CN223785196U

CN223785196U - Battery devices, heat exchange components and electrical appliances

Info

Publication number: CN223785196U
Application number: CN202520290008.XU
Authority: CN
Inventors: 高邦; 翟玄; 黄小腾
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-04-28
Filing date: 2025-02-21
Publication date: 2026-01-09
Anticipated expiration: 2035-02-21
Also published as: CN121620830A; CN223771180U; CN223771182U; CN223757567U; CN223771183U; CN223809157U; WO2025227896A1; CN120854735A; CN120854734A; CN223785194U; CN223785195U; CN223785197U; WO2025227894A1; CN223809158U; CN223771181U; WO2025227897A1; CN120854737A; WO2025227895A1; CN223757566U; CN120854736A

Abstract

The application belongs to the technical field of battery production, and provides a battery device, a heat exchange component and an electricity utilization device, wherein the battery device comprises a battery monomer component and a refrigerant heat exchange component; the refrigerant heat exchange component is internally provided with a refrigerant heat exchange flow passage, the refrigerant heat exchange component comprises a first heat exchange area, the first heat exchange area is configured to exchange heat with the battery monomer component, the refrigerant heat exchange flow passage positioned in the first heat exchange area is symmetrical about a first axis, the first axis is the central axis of the refrigerant heat exchange component in the width direction, and the refrigerant heat exchange flow passages positioned in the first heat exchange area and positioned at two sides of the first axis flow into and flow out of a refrigerant heat exchange medium at positions symmetrical relative to the first axis. The battery pack aims to solve the technical problem that the heat exchange component in the battery device is poor in temperature uniformity of a battery unit assembly.

Description

Battery device, heat exchange component and electricity utilization device

The present application claims priority from the national intellectual property agency, chinese patent application number 202420907842.4 entitled "heat exchange device, battery and electric device," filed 28 at 04 at 2024, the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the technical field of battery production, in particular to a battery device, a heat exchange component and an electric device.

Background

With the continuous development of new energy technology, battery devices are applied to more and more industries, and the battery devices need to operate within a certain temperature range, so that the temperature has an important influence on the battery. Particularly, when the temperature is too high, the battery may suffer from thermal runaway. The temperature of the battery itself needs to be adjusted during the operation of the battery.

In the related art, the heat exchange of the heat exchange component on the battery monomer component is unbalanced, so that the temperature of part of the battery monomer component is too high, and a large amount of heat is accumulated in the battery device, so that the service performance and the service life of the battery device are affected.

Disclosure of utility model

The application aims to provide a battery device, a heat exchange component and an electricity utilization device, and aims to solve the technical problem that the heat exchange component in the battery device is poor in temperature uniformity of a battery unit assembly.

In a first aspect, the present application provides a battery device comprising:

Battery cell assembly, and

The refrigerant heat exchange component is internally provided with a refrigerant heat exchange flow passage, the refrigerant heat exchange component comprises a first heat exchange area, the first heat exchange area is configured to exchange heat with the battery unit component, the refrigerant heat exchange flow passage in the first heat exchange area is symmetrical about a first axis, the first axis is the central axis of the refrigerant heat exchange component in the width direction, and the refrigerant heat exchange flow passages in the first heat exchange area and positioned at two sides of the first axis flow into and flow out of a refrigerant heat exchange medium at positions symmetrical relative to the first axis.

The heat exchange device has the advantages that the flow channel structure in the first heat exchange area is symmetrical, and the flowing direction and the track of the refrigerant heat exchange medium in the flow channel are symmetrical, so that the heat exchange capacity at the symmetrical position is balanced, and when the heat exchange is carried out between the battery unit component and the first heat exchange area, balanced heat exchange can be realized, and the temperatures at two sides of the battery unit component are balanced as much as possible. Specifically, when the battery monomer assembly corresponds to the first heat exchange area, the battery monomer assemblies on two sides of the first axis are symmetrical, namely, the battery monomer assemblies on two sides of the first axis can be provided with the same number of battery monomers in the same arrangement form, and the battery monomers on two sides have the same heat exchange effect.

In an embodiment of the first aspect, the refrigerant heat exchange component is further provided with an inflow channel and an outflow channel, the inflow channel is used for flowing refrigerant heat exchange medium into the refrigerant heat exchange channel in the first heat exchange area, the outflow channel is used for flowing refrigerant heat exchange medium out of the refrigerant heat exchange channel in the first heat exchange area, a communication position of the refrigerant heat exchange channel in the first heat exchange area on the inflow channel is an inflow position and a communication position of the refrigerant heat exchange channel on the outflow channel is an outflow position, and a distance between at least one side edge of the refrigerant heat exchange component and the inflow position is greater than a distance between the refrigerant heat exchange component and the outflow position.

The embodiment has the advantages that the medium temperature at the outflow position is higher than that of the medium at the inflow position, so that the outflow position is arranged closer to the edge position, and the inflow position is arranged closer to the middle position, thereby being beneficial to heat dissipation of the heat concentration area in the middle of the battery unit component.

In one embodiment of the first aspect, the refrigerant heat exchange component further includes a second heat exchange region, the refrigerant heat exchange flow passage in the second heat exchange region being in communication with the refrigerant heat exchange flow passage in the first heat exchange region to flow the refrigerant heat exchange medium into and out of the refrigerant heat exchange flow passage in the first heat exchange region.

The effect of this embodiment lies in that the second heat transfer region provides the inflow outflow structure of refrigerant heat transfer medium for the refrigerant heat transfer runner of first heat transfer region for refrigerant heat transfer medium has realized circulating flow, and this embodiment sets up the inflow runner of refrigerant heat transfer medium alone in the second heat transfer region, has avoided causing the interference to the runner setting of first heat transfer region like this, sets up the runner of inflow and outflow through the solitary region, makes the refrigerant heat transfer runner of first heat transfer region can carry out symmetry and lay as required.

In an embodiment of the first aspect, a heat exchange surface is formed on the refrigerant heat exchange component at least corresponding to the first heat exchange area, and the heat exchange surface is used for contacting with or being disposed adjacent to the battery cell assembly.

The embodiment provides a heat exchange mode through the heat exchange surface, wherein the heat exchange surface is a flat surface and can be in good contact with the battery cell assembly, so that a good heat exchange effect is achieved.

In an embodiment of the first aspect, the refrigerant heat exchange channels in the first heat exchange area and located on the same side of the first axis include a plurality of unit channels with identical or different structures, and the structures of the two unit channels located on two sides of the first axis and located at corresponding positions are symmetrical with respect to the first axis.

The heat exchange capacity of the refrigerant heat exchange channels on two sides of the first axis is consistent, the heat exchange capacity of the unit channels on the corresponding positions are identical, the corresponding positions can be symmetrical positions or positions with equal vertical distance to the first axis, and equivalent heat exchange of the battery monomers on two sides of the battery unit assembly can be realized when the battery unit assembly performs heat exchange.

In an embodiment of the first aspect, the refrigerant heat exchange channels in the second heat exchange area include an inflow channel and an outflow channel, and the unit channels located on the same side of the first axis in the first heat exchange area share the same inflow channel to enter the refrigerant heat exchange medium, and share the same outflow channel to flow out of the refrigerant heat exchange medium.

The embodiment provides that the unit flow channels located at the same side of the first axis share the same inflow flow channel, because in normal conditions, various indexes of the refrigerant heat exchange medium in the same inflow flow channel are the same, i.e. the heat exchange effect is the same, such as the flow speed, the temperature, etc., when each unit flow channel at the same side commonly uses one inflow flow channel, the refrigerant heat exchange medium entering each unit flow channel can be controlled more accurately, for example, the sequence of the refrigerant heat exchange medium flowing to each unit flow channel at the same side, etc., so that the heat exchange capability of each unit flow channel at the same side can be controlled to a certain extent. And each unit flow passage on the same side can also flow out the refrigerant heat exchange medium through the same outflow flow passage, and the structure is simplified by flowing out the refrigerant heat exchange medium through the same outflow flow passage.

In an embodiment of the first aspect, the unit flow channels located at different sides of the first axis respectively enter the refrigerant heat exchange medium through different inflow flow channels, and respectively exit the refrigerant heat exchange medium through different outflow flow channels.

The unit flow channels on different sides are provided to flow into the refrigerant heat exchange medium through different inflow flow channels, so that the heat exchange capacity can be increased, and compared with the case that the same inflow flow channel is used on two sides at the same time, the heat exchange capacity is stronger, namely the inflow of the refrigerant heat exchange medium is increased. The unit flow channels on two sides respectively enter the refrigerant heat exchange medium through different inflow flow channels, but the different inflow flow channels are required to be set as far as possible to be identical in each index of the refrigerant heat exchange medium, for example, two inflow flow channels formed by splitting the same main flow channel can be adopted.

In an embodiment of the first aspect, the plurality of unit flow channels located on the same side of the first axis in the flow direction of the inflow flow channel are sequentially communicated with the inflow flow channel in an order from upstream to downstream, an order of communication between any one of the plurality of unit flow channels located on the side of the unit flow channel and the inflow flow channel is denoted by N, and order labels N corresponding to two unit flow channels located on two sides of the first axis and symmetrically arranged are the same.

Therefore, the unit flow channels with symmetrical positions are connected in the same position sequence, so that the refrigerant heat exchange media with approximately the same indexes, such as the indexes of quantity, flow rate, temperature and the like, are correspondingly obtained, the balance of heat exchange capacity of the refrigerant heat exchange flow channels at two sides of the first axis is further enhanced, and the balanced heat exchange of the battery cell assemblies is facilitated during heat exchange.

In an embodiment of the first aspect, the inflow channel has an inflow port, and the communicating positions of the two unit channels located at two sides of the first axis and symmetrically arranged on the inflow channel are equal in distance from the inflow port in the length extending direction of the inflow channel.

Because the distances are equal, the two unit flow channels can better acquire the refrigerant heat exchange media with the same index, so that the refrigerant heat exchange media respectively flowing into the two unit flow channels at symmetrical positions are the same, and the symmetrical unit flow channels can acquire the same heat exchange capacity.

In an embodiment of the first aspect, a distance from a communication position of the unit flow channel on the inflow flow channel to the inflow port in a length extending direction of the inflow flow channel is S, and S values corresponding to the unit flow channels which are located on the same side of the first axis and are sequentially arranged along a direction perpendicular to the first axis and are sequentially arranged from the first axis from the near to the far are sequentially increased.

The heat exchange capacity of the unit flow channels at different positions is matched with different areas of heat of the battery unit assembly, and the temperature of each place of the battery unit assembly is kept balanced.

In one embodiment of the first aspect, the unit flow channel includes an upstream flow channel and a downstream flow channel that are connected, the upstream flow channel and the downstream flow channel are parallel to the first axis, and the upstream flow channel and the downstream flow channel of two adjacent unit flow channels that are located on the same side as the first axis are adjacently arranged.

The effect of this embodiment is that the upstream flow channel and the downstream flow channel of two adjacent unit flow channels are adjacently arranged because the upstream flow channel and the downstream flow channel have a higher heat exchange capacity than the downstream flow channel, i.e., the temperature per se is relatively low, for a certain unit flow channel, so that the heat can be uniform to some extent without forming an overheat and supercooling region.

In an embodiment of the first aspect, upstream flow channels of two unit flow channels located on both sides of and adjacent to the first axis are provided adjacent.

Therefore, the embodiment has the effect that heat exchange can be effectively performed on the middle area of the battery unit assembly, and the overhigh temperature of the middle area of the battery unit assembly is prevented.

In an embodiment of the first aspect, the downstream flow channel of a single said unit flow channel is located on a side of the unit flow channel remote from said first axis.

The downstream flow channel of the single unit flow channel has higher temperature, namely lower heat exchange capacity, than the upstream flow channel of the unit flow channel, so that the downstream flow channel is arranged far away from the first axis, namely correspondingly far away from the middle area of the battery unit component, the condition that the heat exchange capacity of the unit flow channel close to the middle area of the battery unit component is lower is avoided, and the balance of the temperatures of all parts of the battery unit component is facilitated.

In one embodiment of the first aspect, the unit flow passage further includes a return flow passage in communication with a downstream flow passage of the unit flow passage, the return flow passage being configured to communicate with a refrigerant heat exchange flow passage in the second heat exchange region to flow out of the refrigerant heat exchange medium.

The embodiment provides that the unit flow channel further includes a backflow flow channel, the backflow flow channel is a refrigerant heat exchange flow channel which is used for receiving a downstream flow channel and is communicated with the second heat exchange area, because the refrigerant heat exchange medium flowing out of the unit flow channel needs to flow back, the refrigerant temperature in the backflow stage is greatly increased, the effect on heat exchange is not great, the backflow flow channel used for backflow is independently arranged, the backflow flow channel can be independently arranged due to the reduction of heat exchange capacity, the main heat exchange position is avoided, and the influence of the refrigerant in the backflow stage on the heat exchange effect can be reduced.

In one embodiment of the first aspect, the backflow channel includes a backflow section parallel to the first axis, and a plurality of backflow sections of a plurality of unit channels located on the same side of the first axis are disposed adjacent to each other and located at an end region of the first heat exchange region away from the first axis, and a region of the first heat exchange region other than the end region is used for heat exchange with the battery cell assembly.

The effect of this embodiment lies in, set up the main part backward flow section of backward flow runner outside the region of participating in heat transfer, do not participate in heat transfer, reduced the influence to battery cell subassembly temperature equilibrium.

In an embodiment of the first aspect,

In a direction perpendicular to the first axis:

The distance between the adjacent reflux sections positioned on the same side of the first axis is L1;

The upstream flow channel of the same unit flow channel comprises a plurality of upstream flow dividing channels parallel to the first axis, and the distance between adjacent upstream flow dividing channels is L2;

The downstream flow channels of the same unit flow channel comprise a plurality of downstream flow dividing channels parallel to the first axis, and the distance between adjacent downstream flow dividing channels is L3;

then L1 is less than L2 and L1 is less than L3.

The effect of this embodiment is that, because the reflow section is provided denser, the effect on the temperature equalization of the battery cell assembly is reduced.

In one embodiment of the first aspect, the battery cell assembly includes a plurality of battery cells aligned along the first axis direction and along a direction perpendicular to the first axis.

The effect of this embodiment lies in for the arrangement of battery monomer in the battery monomer subassembly has complied with the structural layout that this embodiment provided the refrigerant heat transfer runner, can exert the biggest effect, guarantees the temperature equilibrium of battery monomer subassembly everywhere.

In one embodiment of the first aspect, the battery device further includes a case having a receiving space, the refrigerant heat exchanging member is located in the receiving space or is used as a side plate surface to form the case, and the refrigerant heat exchanging member is used to contact the battery cell assembly.

The embodiment has the advantages that the assembly structure of the refrigerant heat exchange component in the battery device is simple and reasonable, and the use is convenient.

In a second aspect, the present application further provides an embodiment of a heat exchange component, including the refrigerant heat exchange component provided in any one of the foregoing embodiments.

In a third aspect, the present application further provides an embodiment of an electrical device, including the battery device provided in any one of the foregoing embodiments, where the battery device is configured to store or provide electrical energy.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the embodiments of the present application or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

Fig. 2 is a schematic view of an exploded structure of a battery device according to some embodiments of the present application;

fig. 3 is an exploded view of a refrigerant heat exchange component according to some embodiments of the present application;

Fig. 4 is a schematic structural diagram of a refrigerant heat exchange flow channel of a refrigerant heat exchange component according to some embodiments of the present application;

FIG. 5 is a schematic view of the relative positions of the cooling heat exchange flow channels and the battery cell assembly of FIG. 4;

Fig. 6 is a schematic temperature distribution diagram of a refrigerant heat exchange flow channel of a refrigerant heat exchange component according to some embodiments of the present application.

Reference numerals illustrate:

1000. A vehicle;

100. 200 parts of battery device, 300 parts of controller and motor;

10. 20, a box body;

1. Refrigerant heat exchange members, 11, refrigerant heat exchange flow passages, 111, inflow flow passages, 112, outflow flow passages, 113, extension flow passages, 114, inflow position, 115, outflow position, 116, inflow port, 117, unit flow passages, 1171, upstream flow passages, 1172, downstream flow passages, 1173, return flow passages, 1174, return flow sections, 12, first heat exchange areas, 121, first axes, 122, end areas, 13, second heat exchange areas, 14, first plates, 15, second plates;

2. and (3) a joint.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are only examples, not to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, the terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "fixed" and the like are to be construed broadly and include, for example, fixed connection, detachable connection, or integral therewith, mechanical connection, electrical connection, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In recent years, new energy automobiles have been developed in a leap way, the market share of the new energy automobiles is higher and higher, and the quick and efficient realization of energy supplementing is a problem to be solved in the new energy automobile industry.

The battery device in the new energy automobile can release more heat in the process of charging and discharging, and the heat exchange component capable of exchanging heat to the battery cell assembly can be arranged in the battery device generally, so that the battery cell assembly can be cooled down through heat exchange.

Fast charging is a mainstream solution for realizing fast energy supplementing of new energy vehicles, and many challenges are encountered in the implementation process, and a great amount of heat can be generated by the electrode assembly in the fast charging process, so that the internal temperature of the battery device is extremely easy to rise rapidly. Under the condition of quick charge, the problem that the heat exchange of the heat exchange component to the battery monomer component is unbalanced is more likely to occur, so that the temperature of part of the battery monomer component is rapidly increased, and a large amount of heat is accumulated in the battery device, so that the service performance and the service life of the battery device are affected, and even the battery device has larger hidden danger in the use process, therefore, the balanced heat dissipation and the quick heat exchange of the battery device are ensured, and the consistency of the temperature distribution of the battery device is improved, so that the bottleneck of battery thermal management is formed.

Specifically, the battery device may generate heat during charging and discharging, if the heat cannot be effectively dissipated, the performance of the battery device may be reduced, the service life of the battery device may be shortened, the chemical reaction inside the battery device may be accelerated due to high temperature, the internal resistance of the battery device may be increased, the energy density may be reduced, and thermal runaway may be caused in severe cases. Therefore, in the battery device, the heat exchange component is arranged to cool the battery cell assembly.

To the inside temperature distribution of battery device uneven, the problem of local easy appearance high temperature, through research finding, there is the overheated region of great area on the heat transfer part of battery device inside, overheated region's heat transfer ability is lower, the overheated region's of large tracts of land existence can reduce heat exchange efficiency, heat transfer ability etc. to battery cell assembly, make the temperature of battery cell assembly corresponding to overheated region can sharply rise, lead to the temperature distribution on the battery cell assembly uneven, influence battery device's normal use, in addition, overheated region can also lead to the inside heat of battery device unable diffusion in time, arouse battery device inside temperature to influence battery cell assembly and battery device's performance and life.

Further analysis, the inside heat exchange flow channel that is equipped with of heat exchange component, the intake way in the heat exchange flow channel sets up intensively, the return circuit also sets up intensively, heat exchange fluid (or heat transfer refrigerant) can become gaseous by liquid after getting into the intake way and exchanging heat, heat transfer refrigerant is basically gasified in the return circuit, gaseous heat transfer refrigerant's heat transfer volume is less, make produce overheated region on the heat exchange component, overheated region reduces the heat transfer ability of battery cell assembly, the return circuit sets up intensively, can form the overheated region of large tracts of land, overheated region indicates the region that heat transfer ability is weaker, overheated region area is too big can influence the holistic heat transfer effect of battery cell assembly, lead to the temperature of battery cell assembly corresponding to overheated region sharply risees, the unbalanced problem appears in temperature distribution on the battery cell assembly, heat accumulation, and then influence battery cell assembly and battery device's performance and life.

The present application provides a battery device 100, which can solve the above problems to a certain extent, and makes the overall temperature of the battery cell assembly 10 more stable and balanced by making an adaptive design for the heat exchange capability of the heat exchange component everywhere, which is beneficial to improving the service performance and service life of the battery cell assembly 10 and the battery device 100.

Specifically, referring to fig. 2, an embodiment of the present application provides a battery device 100 (Battery Apparatus), and the battery device 100 may include one or more battery cell assemblies 10 for providing voltage and capacity, and the battery cell assemblies 10 (Battery Cell Assembly) may include a plurality of battery cells connected in series, parallel, or series-parallel by a bus bar. The battery device 100 may also be a battery Pack (battery Pack) that generally includes a case 20 and one or more battery cell assemblies 10, the battery cell assemblies 10 being housed in the case 20.

The battery device 100 disclosed in the embodiment of the application can be used for an electric device using the battery device 100 as a power source or various energy storage devices and energy storage systems using the battery device 100 as an energy storage element. The powered device may be, but is not limited to, a cell phone, portable device, notebook computer, electric toy, electric tool, battery car, vehicle 1000, boat, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery device 100 is provided in the interior of the vehicle 1000, and the battery device 100 may be provided at the bottom or at the head or at the tail of the vehicle 1000. The battery device 100 may be used for power supply of the vehicle 1000, for example, the battery device 100 may serve as an operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery device 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, the battery device 100 may not only serve as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery device 100 according to some embodiments of the present application. In one embodiment, the Battery device 100 includes a case 20 and a Battery cell assembly 10, where a receiving space is formed in the case 20, the Battery cell assembly 10 is received in the receiving space, and the Battery cell assembly 10 is often formed by arranging a plurality of Battery cells, or the Battery cell assembly 10 may be a Battery Module (Battery Module), and the Battery Module is formed by arranging and fixing a plurality of Battery cells. The case 20 is used for providing a receiving space for the battery cell assembly 10, and the case 20 may have various structures.

The battery cell refers to the smallest unit constituting the battery device 100. Each battery cell may be a secondary battery cell or a primary battery cell, or may be a lithium-sulfur battery cell, a sodium ion battery cell or a magnesium ion battery cell, but is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped.

According to some embodiments of the present application, referring to fig. 2 to 6, a battery device 100 is provided, and the battery device 100 includes a battery cell assembly 10 and a refrigerant heat exchanging member 1.

The refrigerant heat exchange component 1 is internally provided with a refrigerant heat exchange flow passage 11, the refrigerant heat exchange component 1 comprises a first heat exchange area 12, the first heat exchange area 12 is configured to exchange heat with the battery cell assembly 10, the refrigerant heat exchange flow passage 11 positioned in the first heat exchange area 12 is symmetrical about a first axis 121, the first axis 121 is the central axis of the refrigerant heat exchange component 1 in the width direction, and the refrigerant heat exchange flow passages 11 positioned in the first heat exchange area 12 and positioned at two sides of the first axis 121 flow in and out of a refrigerant heat exchange medium at symmetrical positions relative to the first axis 121.

Specifically, the battery unit assembly 10 includes one or more battery units, and the refrigerant heat exchange component 1 needs to exchange heat with the battery unit assembly 10, so the refrigerant heat exchange component 1 needs to be disposed close to the battery unit assembly 10, or the refrigerant heat exchange component 1 needs to be in direct contact with or abut against the battery unit assembly 10, thereby improving the heat exchange effect. The present embodiment provides heat exchange between the first heat exchange area 12 and the battery cell assembly 10, because the design of the refrigerant heat exchange channel 11 in the first heat exchange area 12 can make the temperature of each place of the battery cell assembly 10 as uniform as possible when the first heat exchange area 12 exchanges heat with each place of the battery cell assembly 10.

Specifically, the battery unit assembly 10 may include a plurality of battery units, the surface of the battery unit, which exchanges heat with the first heat exchange area 12, may be a bottom surface of the battery unit or a side surface of the battery unit, taking the battery device 100 as an example, the surface below the battery unit is a bottom surface, and the surface of the battery unit along the vertical direction is a side surface, where in this embodiment, the first heat exchange area 12 of the refrigerant heat exchange component 1 may exchange heat with the bottom surface or the side surface of the battery unit, that is, the refrigerant heat exchange component 1 may be located at the bottom of the battery unit assembly 10, or may be located at a side portion of the battery unit assembly 10, and the refrigerant heat exchange component 1 located at the bottom of the battery unit assembly 10 may also be generally referred to as a heat exchange bottom plate or a cooling bottom plate.

For convenience of description, the following embodiment will take a battery device 100 according to an embodiment of the present application as an example, where the refrigerant heat exchange component 1 is located at the bottom of the battery unit assembly 10.

As shown in fig. 3, the refrigerant heat exchange component 1 may include a first plate 14 and a second plate 15, where the second plate 15 is formed with a groove structure having a preset extension length and an extension shape, and the groove structure may be manufactured by using a press forming method, and the first plate 14 and the second plate 15 are fixedly or detachably connected, and the notch of the groove structure is closed to form a through hole structure or a cavity structure, that is, form the refrigerant heat exchange flow channel 11.

Or the refrigerant heat exchange component 1 can also be an integral plate, and the integral plate is provided with a refrigerant heat exchange flow passage 11.

The first heat exchange area 12 may include a part of refrigerant heat exchange channels 11, the refrigerant heat exchange channels 11 in the first heat exchange area 12 are symmetrical about a first axis 121, the first axis 121 refers to an axis in the first heat exchange area 12, specifically may be a central axis of the refrigerant heat exchange component 1 in a width direction, and the refrigerant heat exchange channels 11 on two sides of the axis are symmetrically disposed about the axis. Therefore, when the heat exchange is performed between the first heat exchange area 12 and the battery unit assembly 10, the symmetrically arranged refrigerant heat exchange channels 11 can make the heat exchange capacity of the two sides of the first axis 121 more balanced.

In the present embodiment, the refrigerant heat exchange channels 11 located in the first heat exchange area 12 and located at two sides of the first axis 121 respectively flow into the refrigerant heat exchange medium at the symmetrical position and flow out of the refrigerant heat exchange medium at the symmetrical position, and when the refrigerant heat exchange channels 11 are symmetrically located, the flow directions of the refrigerant heat exchange mediums at two sides of the first axis 121 are equivalent to be synchronous or the flow track is symmetrical when the refrigerant heat exchange mediums flow into the symmetrical position and flow out of the refrigerant heat exchange medium at the symmetrical position, so that the heat of the refrigerant heat exchange channels 11 at two sides of the first axis 121 is relatively balanced, the heat exchange capacity of the battery cell assembly 10 is substantially uniform, the first axis 121 can be used as a central line when the battery cell assembly 10 is placed, and the structures of the battery cell assembly 10 at two sides of the first axis 121 are substantially the same, so that the temperatures at two sides of the battery cell assembly 10 can be balanced as much as possible when the battery cell assembly 10 performs heat exchange.

The effect of this embodiment is that not only the flow channel structure in the first heat exchange area 12 is symmetrical, but also the flow direction and track of the refrigerant heat exchange medium in the flow channel are symmetrical, so that the heat exchange capacity at the symmetrical position is balanced, and when the heat exchange is performed between the battery unit assembly 10 and the first heat exchange area 12, the balanced heat exchange can be realized, and the temperatures at two sides of the battery unit assembly 10 are balanced as much as possible. Specifically, when the battery cell assemblies 10 are disposed corresponding to the first heat exchange area 12, the battery cell assemblies 10 on both sides of the first axis 121 are also symmetrical, that is, the battery cell assemblies 10 on both sides of the first axis 121 may be disposed with the same number of battery cells in the same arrangement, and the battery cells on both sides have the same heat exchange effect.

In some embodiments, referring to fig. 4, the refrigerant heat exchange component 1 is further provided with an inflow channel 111 and an outflow channel 112, the inflow channel 111 is used for flowing refrigerant heat exchange medium into the refrigerant heat exchange channel 11 in the first heat exchange area 12, the outflow channel 112 is used for flowing refrigerant heat exchange medium out of the refrigerant heat exchange channel 11 in the first heat exchange area 12, a communication position of the refrigerant heat exchange channel 11 in the first heat exchange area 12 on the inflow channel 111 directly or through the extension channel 113 is an inflow position 114, and a communication position on the outflow channel 112 is an outflow position 115, and a distance between at least one side edge of the refrigerant heat exchange component 1 and the inflow position 114 is greater than a distance between the refrigerant heat exchange component and the outflow position 115.

The present embodiment provides the inflow channel 111 and the outflow channel 112, and the refrigerant heat exchange channel 11 in the first heat exchange area 12 may directly communicate with the inflow channel 111 and the outflow channel 112, or may also communicate with the inflow channel 111 and the outflow channel 112 through the extension channel 113 in some cases. The communication position on the inflow channel 111 is an inflow position 114, and the communication position on the outflow channel 112 is an outflow position 115, so that the distance between at least one side of the refrigerant heat exchange component 1 and the inflow position 114 is greater than the distance between the refrigerant heat exchange component 1 and the outflow position 115, and the inflow position 114 and the outflow position 115 meeting the distance relationship in this embodiment may be the inflow position 114 and the outflow position 115 of the same circulation channel. The inflow channel 111 and the outflow channel 112 may be part of the refrigerant heat exchange channel 11 in the refrigerant heat exchange member 1.

The effect of this embodiment is that the medium temperature at the outflow site 115 is higher than the medium temperature at the inflow site 114, so that the outflow site 115 is set closer to the edge position, and the inflow site 114 is set closer to the middle position, thereby facilitating heat dissipation to the heat concentration area in the middle of the battery cell assembly 10. Because the cells are concentrated in the middle of the cell assembly 10, the temperature is higher and the temperature is lower on both sides or edges.

In some embodiments, referring to fig. 4, the refrigerant heat exchange component 1 further includes a second heat exchange area 13, and the refrigerant heat exchange channel 11 in the second heat exchange area 13 is in communication with the refrigerant heat exchange channel 11 in the first heat exchange area 12 so that the refrigerant heat exchange medium flows into and out of the refrigerant heat exchange channel 11 in the first heat exchange area 12.

Specifically, the refrigerant heat exchange component 1 includes a second heat exchange area 13, and the refrigerant heat exchange channels 11 in the second heat exchange area 13 may be symmetrically disposed about the first axis 121 or may not be symmetrically disposed about the first axis 121, which is configured to provide a refrigerant heat exchange medium to the refrigerant heat exchange channels 11 in the first heat exchange area 12, so that the refrigerant heat exchange medium flows in and out. The second heat exchange region 13 may not participate in the heat exchange process with the battery cell assembly 10 as well. The second heat exchange area 13 may be respectively provided with a flow passage for supplying the refrigerant heat exchange medium to the refrigerant heat exchange flow passages 11 of the first heat exchange area 12 at two sides of the first axis 121, and is used for receiving the refrigerant heat exchange medium flowing out from the refrigerant heat exchange flow passages 11 at two sides, specifically, may be an inflow flow passage 111 and an outflow flow passage 112, so as to form a circulation flow of the refrigerant heat exchange medium.

The effect of this embodiment is that the second heat exchange area 13 provides the inflow and outflow structure of the refrigerant heat exchange medium for the refrigerant heat exchange channel 11 of the first heat exchange area 12, so that the refrigerant heat exchange medium realizes the circulation flow, and the inflow and outflow channel of the refrigerant heat exchange medium is separately arranged in the second heat exchange area 13, so that interference to the channel arrangement of the first heat exchange area 12 is avoided, and the inflow and outflow channel is arranged through the separate area, so that the refrigerant heat exchange channel 11 of the first heat exchange area 12 can be symmetrically arranged according to the requirement.

In some embodiments, referring to fig. 4 and 5, the refrigerant heat exchange component 1 forms a heat exchange surface at least corresponding to the first heat exchange area 12, and the heat exchange surface is used to contact the battery cell assembly 10 or is disposed adjacent to the battery cell assembly 10.

Specifically, the refrigerant heat exchange component 1 exchanges heat with the battery unit assembly 10 through a heat exchange surface, and since the first heat exchange area 12 is used for exchanging heat with the battery unit assembly 10, at least a heat exchange surface is formed corresponding to the first heat exchange area 12, in some cases, the second heat exchange area 13 may also form a heat exchange surface correspondingly, the heat exchange surfaces of the first heat exchange area 12 and the second heat exchange area 13 may be the same plane, and when the position of the battery unit assembly 10 is set, the battery unit assembly 10 may be set at the heat exchange surface formed corresponding to the first heat exchange area 12 correspondingly.

The refrigerant heat exchange flow channel 11 is in a flow channel structure, as described above, the refrigerant heat exchange component 1 may include a first plate 14 and a second plate 15, a groove formed along a preset direction of the refrigerant heat exchange flow channel 11 may be formed on a surface of the second plate 15, after the second plate 15 is formed, the groove is closed by attaching the second plate 15 to the first plate 14, so that the refrigerant heat exchange flow channel 11 is formed, at this time, a heat exchange surface is formed on a surface of the first plate 14 opposite to the groove, and the battery unit assembly 10 is disposed on a heat exchange surface portion corresponding to the first heat exchange area 12.

Or when the refrigerant heat exchange component 1 is an integral plate, the integral plate has a certain thickness, and the refrigerant heat exchange flow passage 11 is arranged on the integral plate, and the plate surface of the integral plate is a heat exchange surface.

The embodiment provides a heat exchange mode through the heat exchange surface, wherein the heat exchange surface is a flat surface, and can be in good contact with the battery cell assembly 10, so that a good heat exchange effect is achieved.

In some embodiments, referring to fig. 4, the refrigerant heat exchange channel 11 in the first heat exchange area 12 and located on the same side of the first axis 121 includes a plurality of unit channels 117 with the same or different structures, and the structures of the two unit channels 117 located on two sides of the first axis 121 and located at corresponding positions are symmetrical with respect to the first axis 121.

Specifically, the present embodiment provides a form of a plurality of unit flow channels 117, and the refrigerant heat exchange flow channel 11 located on the same side of the first axis 121 in the first heat exchange region 12 includes a plurality of unit flow channels 117 instead of one integral flow channel, and if the integral flow channel is adopted, the local heat exchange capability is not easy to control, and the specific heat exchange cannot be performed for the specific region of the battery cell assembly 10.

In this embodiment, a plurality of unit flow channels 117 are adopted, and the structures are the same or different, and the middle area of a general battery unit assembly 10 has a relatively concentrated battery unit, and the temperature of the middle area is higher than that of the edge area, so that the corresponding adapted unit flow channel 117 can be arranged corresponding to the area, and the unit flow channel 117 with another structure can be arranged at the edge area, thereby realizing adaptive heat exchange.

In addition, the present embodiment also provides that the two unit flow passages 117 respectively located at both sides of the first axis 121 and at corresponding positions are symmetrical with respect to the first axis 121. In this way, the heat exchange capacities of the refrigerant heat exchange channels 11 at the two sides of the first axis 121 are consistent, the heat exchange capacities of the unit channels 117 at the corresponding positions are identical, the corresponding positions can be symmetrical positions or positions with equal vertical distances to the first axis 121, and when the battery cell assembly 10 performs heat exchange, equivalent heat exchange of the battery cells at the two sides of the battery cell assembly 10 can be realized.

In some embodiments, referring to fig. 4, the refrigerant heat exchange channels 11 in the second heat exchange area 13 include an inflow channel 111 and an outflow channel 112, and the unit channels 117 located on the same side of the first axis 121 in the first heat exchange area 12 share the same inflow channel 111 to enter the refrigerant heat exchange medium, and share the same outflow channel 112 to exit the refrigerant heat exchange medium.

Specifically, the second heat exchange area 13 includes an inflow channel 111 and an outflow channel 112, the inflow channel 111 is used for flowing into the refrigerant heat exchange medium, so that the refrigerant heat exchange medium enters the refrigerant heat exchange channel 11 in the first heat exchange area 12, and the outflow channel 112 is used for flowing out of the refrigerant heat exchange medium, so as to receive the refrigerant heat exchange medium flowing out of the first heat exchange area 12.

The present embodiment provides that the unit flow channels 117 located on the same side of the first axis 121 share the same inflow channel 111, because in normal circumstances, the indicators of the refrigerant heat exchange medium in the same inflow channel 111 are the same, i.e. the heat exchange effect is the same, such as the flow rate, the temperature, etc., when each unit flow channel 117 on the same side shares one inflow channel 111, the refrigerant heat exchange medium entering each unit flow channel 117 can be controlled more accurately, for example, the sequence of the refrigerant heat exchange medium flowing to each unit flow channel 117 on the same side in the same inflow channel 111, etc., so that the heat exchange capability of each unit flow channel 117 on the same side can be controlled to a certain extent.

In addition, each unit flow passage 117 on the same side can also flow out the refrigerant heat exchange medium through the same outflow flow passage 112, and the structure is simplified by flowing out the refrigerant heat exchange medium through the same outflow flow passage 112.

The present embodiment may further provide a joint 2, the joint 2 being connected to the inflow flow passage 111 and the outflow flow passage 112, respectively.

In some embodiments, referring to fig. 4, the unit flow channels 117 located at different sides of the first axis 121 respectively enter the refrigerant heat exchange medium through different inflow flow channels 111, and respectively exit the refrigerant heat exchange medium through different outflow flow channels 112.

The embodiment provides that the unit flow channels 117 on different sides flow into the refrigerant heat exchange medium through the different inflow flow channels 111, which has the effect of increasing the heat exchange capacity, and compared with the case that the same inflow flow channel 111 is used on both sides, the heat exchange capacity is stronger, that is, the inflow of the refrigerant heat exchange medium is increased. The unit flow passages 117 on both sides respectively enter the refrigerant heat exchange medium through different inflow flow passages 111, but the different inflow flow passages 111 need to be set as far as possible so that the indexes of the refrigerant heat exchange medium in the interior are the same, for example, two inflow flow passages 111 formed by splitting the same main flow passage may be used.

In some cases, for example, when the requirement on heat exchange capacity is not high, the unit flow channels 117 on both sides can also enter the refrigerant heat exchange medium through the same inlet flow channel 111, so that the unit flow channels 117 on both sides are set to have the same or approximately the same heat exchange capacity.

In some embodiments, referring to fig. 4, a plurality of unit flow channels 117 located on the same side of the first axis 121 in the flow direction of the inflow flow channel 111 are sequentially connected to the inflow flow channel 111 in the order from upstream to downstream, the order of connecting any one of the unit flow channels 117 to the inflow flow channel 111 among the plurality of unit flow channels 117 located on the side thereof is denoted by N, and the order of connecting two unit flow channels 117 located on both sides of the first axis 121 and symmetrically arranged is denoted by N.

Specifically, in this embodiment, on the basis that the structure of the unit flow channels 117 on both sides of the first axis 121 is symmetrical and the positions of the inflow and outflow of the refrigerant heat exchange medium are also symmetrical, the heat exchange capacity of the refrigerant heat exchange medium is set to be symmetrical or approximately the same, so that the unit flow channels 117 on both sides of the first axis 121 can be further designed to have substantially the same heat exchange capacity.

If the refrigerant heat exchange media in the unit flow channels 117 at the two symmetrical positions are set to be approximately the same, the order of the unit flow channels 117 at the two symmetrical positions to the inlet flow channel 111 in each unit flow channel 117 at the side is required to be the same, the order refers specifically to the order of sequentially connecting each unit flow channel 117 at the same side from the upstream to the downstream of the inlet flow channel 111, and the smaller the order mark N is, the closer to the upstream is indicated. For example, the plurality of unit flow channels 117 on one side are sequentially connected in order from upstream to downstream, and the closer to the upstream of the inflow flow channel 111, the stronger the heat exchange capability of the refrigerant heat exchange medium, or the higher the flow rate of the refrigerant heat exchange medium of the unit flow channel 117 connected first may be. The sequence of the connection of any one of the unit flow paths 117 from upstream to downstream in the plurality of unit flow paths 117 on the same side is denoted by N, for example, if the sequence of a certain unit flow path 117 is denoted by N being 1, it means that among all the unit flow paths 117 on the same side, the connection position of the unit flow path 117 is the most upstream position, and N is denoted by 2, it means that there is a unit flow path 117 connected upstream of the unit flow path 117 in advance. The unit flow paths 117 may be directly connected to the inlet flow path 111, or the unit flow paths 117 may be connected to the inlet flow path 111 through the extension flow path 113, and the lengths of the extension flow paths 113 through which the respective unit flow paths 117 are provided may be the same in order to eliminate the influence of the extension flow paths 113 on heat exchange capability.

In this embodiment, the flow direction of the inflow channel 111 refers to the direction in which the internal refrigerant heat exchange medium flows, and is the flow direction from upstream to downstream, the multiple unit channels 117 on the same side are sequentially connected in order of the connection positions from upstream to downstream, and the order marks N corresponding to the two unit channels 117 symmetrically disposed on both sides of the first axis 121 are the same, which means that, for example, the connection position of a certain unit channel 117 on the side with the inflow channel 111 is the second from upstream to downstream among the multiple unit channels 117 on the side, the connection position of the unit channel 117 symmetrical to the unit channel 117 on the opposite side with the inflow channel 111 is the second from upstream to downstream among the multiple unit channels 117 on the side.

Therefore, in this embodiment, the unit flow channels 117 with symmetrical positions are connected in the same order, so that the refrigerant heat exchange media with approximately the same indexes, such as the number, the flow rate, the temperature, and the like, are correspondingly obtained, so that the heat exchange capacity of the refrigerant heat exchange flow channels 11 on both sides of the first axis 121 is further balanced, and the balanced heat exchange of the portions of the battery cell assembly 10 on both sides of the first axis 121 is facilitated during the heat exchange.

In some embodiments, referring to fig. 4, the inflow channel 111 has an inflow port 116, and two unit channels 117 disposed symmetrically on two sides of the first axis 121 are equally spaced from the inflow port 116 in a length extending direction of the inflow channel 111.

Specifically, in order to further achieve that the heat exchange capacities of the two unit flow passages 117 at the two symmetrical positions on the two sides of the first axis 121 are approximately the same, the present embodiment provides that the distances from the two symmetrical unit flow passages 117 to the inlet 116 in the length extension direction of the inlet flow passage 111 at the communication position of the inlet flow passage 111 are equal. The communication location may be the inflow location 114 described above. The inlet 116 may be provided on the joint 2, and the outlet may also be provided on the joint 2.

Since the distances are equal, the two unit flow passages 117 can better acquire the refrigerant heat exchange medium with the same index, so that the refrigerant heat exchange medium respectively flowing into the two unit flow passages 117 at the symmetrical positions is the same, and the symmetrical unit flow passages 117 can acquire the same heat exchange capacity.

In some cases, referring to fig. 4, the unit flow channel 117 may be connected to the inflow flow channel 111 through the extension flow channel 113, where the connection position may be a connection position between the extension flow channel 113 and the inflow flow channel 111, and the connection position may be the inflow position 114. In this case, the extension flow paths 113 of the plurality of unit flow paths 117 also need to have the same length, so that the extension flow paths 113 may be located in the second heat exchange region 13 without affecting the heat exchange capability of the refrigerant heat exchange medium in the plurality of unit flow paths 117.

In some embodiments, referring to fig. 4, the distance between the communication position of the unit flow channel 117 on the inflow flow channel 111 and the inflow port 116 in the length extending direction of the inflow flow channel 111 is S, and the S values corresponding to the unit flow channels 117 sequentially arranged along the direction perpendicular to the first axis 121 and sequentially arranged from the first axis 121 from the top to the bottom sequentially increase.

Specifically, if the distances from the communication position to the inlet 116 are the same, the index of the refrigerant heat exchange medium flowing into the unit flow passage 117 is approximately the same. The first axis 121 is a middle position of the first heat exchanging region 12, which corresponds to a central region of the battery cell assembly 10, and the arrangement of the battery cells at this position is concentrated, so that the temperature of the battery cell assembly 10 in this region is higher, and the temperature of the battery cell assembly 10 gradually decreases toward the two sides, and therefore, a stronger heat exchanging capability is required for the cell flow channels 117 near the first axis 121. The communication location may be the inflow location 114 described above.

Therefore, the present embodiment provides that the S values corresponding to the plurality of unit flow channels 117 sequentially arranged from the near to the far from the first axis 121 sequentially increase, and the larger the S value is, the larger the path that the internal refrigerant heat exchange medium flows through, the lower the heat exchange capacity is relatively, so that the heat exchange capacity of the unit flow channels 117 near the first axis 121 is strongest, and the heat exchange capacity of the unit flow channels 117 sequentially arranged to the two sides sequentially decreases.

The effect of this embodiment is that the heat exchange capability of the unit flow channels 117 at different positions is matched with different areas of the heat of the battery cell assembly 10, which is beneficial to maintaining the temperature of the battery cell assembly 10 at all positions in a uniform manner.

Also, in some cases, referring to fig. 4, the unit flow channel 117 may be connected to the inflow flow channel 111 through the extension flow channel 113, and the connection position may be the connection position between the extension flow channel 113 and the inflow flow channel 111, and the connection position may be the inflow position 114. In this case, the extension flow paths 113 of the plurality of unit flow paths 117 are also required to have the same length, and are not affected by the extension flow paths 113 having different lengths. The extended flow channels 113 may be located in the second heat exchange area 13.

In some embodiments, referring to fig. 4, the unit flow channels 117 include an upstream flow channel 1171 and a downstream flow channel 1172 that are in communication, the upstream flow channel 1171 and the downstream flow channel 1172 are parallel to the first axis 121, and the upstream flow channel 1171 and the downstream flow channel 1172 of two adjacent unit flow channels 117 on the same side of the first axis 121 are disposed adjacent to each other.

Specifically, the upstream flow passage 1171 refers to an upstream portion of the unit flow passage 117 in the flow direction of the refrigerant heat exchange medium, and the downstream flow passage 1172 refers to a downstream portion of the unit flow passage 117 in the flow direction of the refrigerant heat exchange medium, both of which are parallel to the first axis 121.

Meanwhile, for a certain unit flow passage 117, the upstream flow passage 1171 has a higher heat exchange capacity than the downstream flow passage 1172, that is, the temperature itself is relatively low, so that the upstream flow passage 1171 and the downstream flow passage 1172 of two adjacent unit flow passages 117 are adjacently arranged, so that heat can be uniform to some extent, and no overheat and supercooling region is formed.

In some embodiments, referring to fig. 4, upstream flow channels 1171 of two unit flow channels 117 located on either side of the first axis 121 and adjacent to the first axis 121 are disposed adjacent.

In this embodiment, the two unit flow channels 117 near the first axis 121, that is, the upstream flow channels 1171 of the two unit flow channels 117 located on both sides of the first axis 121 and adjacent to the first axis 121 are disposed adjacently, that is, the upstream flow channels 1171 of the two unit flow channels 117 are both near the first axis 121, so that the heat exchange capacity near the first axis 121 is enhanced, that is, the heat exchange capacity of the middle region of the battery cell assembly 10 is enhanced, because the battery cell assembly 10 is disposed corresponding to the first heat exchange region 12, the heat of the middle region of the battery cell assembly 10 is more concentrated and the temperature is higher near the first axis 121.

The present embodiment has the effect of effectively exchanging heat to the middle region of the battery cell assembly 10, and preventing the temperature of the middle region of the battery cell assembly 10 from being excessively high.

In some embodiments, referring to fig. 4, the downstream flow channel 1172 of a single unit flow channel 117 is located on a side of the unit flow channel 117 remote from the first axis 121.

Specifically, the downstream flow channel 1172 of the single unit flow channel 117 has a higher temperature, i.e., a lower heat exchange capacity, than the upstream flow channel 1171 of the unit flow channel 117, so that it is disposed away from the first axis 121, i.e., correspondingly away from the middle region of the battery cell assembly 10, thereby avoiding the situation that the heat exchange capacity of the unit flow channel 117 near the middle region of the battery cell assembly 10 is lower, and facilitating the equalization of the temperatures across the battery cell assembly 10.

In some embodiments, referring to fig. 4, the unit flow channel 117 further includes a return flow channel 1173 in communication with the downstream flow channel 1172 of the unit flow channel 117, and the return flow channel 1173 is configured to communicate with the refrigerant heat exchange flow channel 11 in the second heat exchange region 13 to flow out the refrigerant heat exchange medium.

The refrigerant heat exchange flow passage 11 in the second heat exchange region 13 can supply the refrigerant heat exchange medium to the unit flow passage 117 flow and can also receive the refrigerant heat exchange medium flowing out of the unit flow passage 117.

The present embodiment provides that the unit flow passage 117 further includes a return flow passage 1173, the return flow passage 1173 is a refrigerant heat exchange flow passage 11 that receives the downstream flow passage 1172 and communicates with the second heat exchange area 13, because the refrigerant heat exchange medium flowing out of the unit flow passage 117 needs to flow back, the effect on heat exchange is not great due to the great increase of the temperature of the refrigerant in the return stage, so that the return flow passage 1173 for flow back is separately provided, and the position of the return flow passage 1173 can be separately set to avoid the main heat exchange position due to the decrease of the heat exchange capability, so that the influence of the refrigerant in the return stage on the heat exchange effect can be reduced.

The return flow channel 1173 may be directly connected to the refrigerant heat exchange channel 11 in the second heat exchange region 13, or may be connected through the extension flow channel 113, and the extension flow channel 113 may be located in the second heat exchange region 13.

In some embodiments, referring to fig. 4, the return flow channel 1173 includes a return section 1174 parallel to the first axis 121, and the return sections 1174 of the unit flow channels 117 located on the same side of the first axis 121 are disposed adjacent to each other and located at an end region 122 of the first heat exchange region 12 away from the first axis 121, and a region of the first heat exchange region 12 other than the end region 122 is used for heat exchange with the battery cell assembly 10.

Specifically, the portion of the return flow channel 1173 located in the first heat exchange region 12 mainly consists of the return flow sections 1174, and the heat exchange capability of the return flow sections 1174 of all the unit flow channels 117 is low, so that the plurality of return flow sections 1174 of the plurality of unit flow channels 117 in this embodiment are arranged parallel to the first axis 121 and are adjacently arranged, and are located side by side in the end region 122 of the first heat exchange region 12 away from the first axis 121, and the end region 122 does not participate in heat exchange, so that the return flow sections 1174 with low heat exchange capability do not greatly affect the heat exchange effect, and the problem of uneven temperature of the battery cell assembly 10 is avoided.

The effect of this embodiment is that the main portion of the return section 1174 of the return flow channel 1173 is disposed outside the region involved in heat exchange, does not participate in heat exchange, and reduces the influence on the temperature balance of the battery cell assembly 10.

In some embodiments, referring to fig. 4, in a direction perpendicular to the first axis 121:

The distance between adjacent return sections 1174 on the same side of the first axis 121 is L1;

The upstream flow channel 1171 of the same unit flow channel 117 includes a plurality of upstream flow branches parallel to the first axis 121, and a distance between adjacent upstream flow branches is L2;

The downstream flow channel 1172 of the same unit flow channel 117 includes a plurality of downstream flow branches parallel to the first axis 121, and a distance between adjacent downstream flow branches is L3;

then L1 is less than L2 and L1 is less than L3.

Specifically, the heat exchange capability of the return sections 1174 is lower, that is, the temperature of the refrigerant heat exchange medium in the return sections 1174 is higher, and even if the return sections 1174 are located in the end regions 122, a certain influence may be caused on the uniformity of the temperature of the battery cell assembly 10, for example, a local temperature of the end of the battery cell assembly 10 may be caused to be higher, so that the distance L1 between the return sections 1174 is set smaller, specifically smaller than L2 and L3, and the heat exchange capability is properly increased due to the influence is reduced to a certain extent due to the denser arrangement.

The effect of this embodiment is that the effect on the temperature equalization of the battery cell assembly 10 is reduced because the reflow section 1174 is disposed denser.

In some embodiments, referring to fig. 5, the battery cell assembly 10 includes a plurality of battery cells aligned along a first axis 121 and in a direction perpendicular to the first axis 121.

Specifically, the battery cell assembly 10 includes a plurality of battery cells, which are increased in energy storage, and are arranged along the first axis 121 or in a direction perpendicular to the first axis 121. The arrangement of the battery cells in the battery cell assembly 10 conforms to the structural layout of the refrigerant heat exchange flow channel 11 provided by the embodiment, and can play the maximum role, so that the temperature balance of the battery cell assembly 10 is ensured.

In some embodiments, referring to fig. 2, the battery device 100 further includes a case 20 having a receiving space, the refrigerant heat exchange component 1 is located in the receiving space or is used as a side surface to form the case 20, and the refrigerant heat exchange component 1 is used to contact the battery cell assembly 10.

The present embodiment provides a form of the refrigerant heat exchange component 1 in the battery device 100, which can be placed in the accommodating space, i.e. at the bottom of the accommodating space, for carrying the battery cell assembly 10, and then can be used as a side plate surface forming the box 20, and in either form can contact the battery cell assembly 10 to form heat exchange.

The embodiment has the advantages that the assembly structure of the refrigerant heat exchange component 1 in the battery device 100 is simple and reasonable, and the use is convenient.

The application also provides a specific embodiment of the heat exchange component, which comprises the refrigerant heat exchange component 1 provided by any embodiment.

The heat exchange component of the embodiment comprises the refrigerant heat exchange component 1, so that the heat exchange component can maintain balanced heat dissipation of the battery device 100 when exchanging heat of the battery device 100, and the normal working temperature of the battery device 100 is ensured.

The application also provides an electric device, comprising the battery device 100 provided by any embodiment, wherein the battery device 100 is used for storing or providing electric energy.

Since the power consumption device includes the battery device 100 provided by the embodiment of the present application, the reliability of the use of the power consumption device can be increased.

The foregoing description of the preferred embodiments of the present application has been provided for the purpose of illustrating the general principles of the present application and is not to be construed as limiting the scope of the application in any way. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application, and other embodiments of the present application as will occur to those skilled in the art without the exercise of inventive faculty, are intended to be included within the scope of the present application.

Claims

1. A battery device, characterized in that it comprises:

Battery cell modules; and

A refrigerant heat exchange component is provided with a refrigerant heat exchange channel. The refrigerant heat exchange component includes a first heat exchange region configured to exchange heat with the battery cell assembly. The refrigerant heat exchange channel located within the first heat exchange region is symmetrical about a first axis, which is the central axis of the refrigerant heat exchange component in the width direction. The refrigerant heat exchange channel located within the first heat exchange region and on both sides of the first axis flows into and out of the refrigerant heat exchange medium at positions symmetrical to the first axis.

2. The battery device as claimed in claim 1, wherein the refrigerant heat exchange component further comprises an inlet channel and an outlet channel, the inlet channel being used to allow refrigerant heat exchange medium to flow into the refrigerant heat exchange channel within the first heat exchange region, and the outlet channel being used to allow refrigerant heat exchange medium to flow out of the refrigerant heat exchange channel within the first heat exchange region, wherein the refrigerant heat exchange channel within the first heat exchange region is connected to the inlet channel directly or through an extension channel at a position that is an inlet position and to the outlet channel at a position that is an outlet position, and at least one side of the refrigerant heat exchange component is at a greater distance from the inlet position than from the outlet position.

3. The battery device as claimed in claim 1 or 2, wherein the refrigerant heat exchange component further includes a second heat exchange region, wherein the refrigerant heat exchange channel in the second heat exchange region is connected to the refrigerant heat exchange channel in the first heat exchange region so that the refrigerant heat exchange medium flows into and out of the refrigerant heat exchange channel in the first heat exchange region.

4. The battery device according to any one of claims 1-3, wherein a heat exchange surface is formed on the refrigerant heat exchange component at least corresponding to the first heat exchange region, and the heat exchange surface is used to contact the battery cell assembly or to be disposed adjacent to the battery cell assembly.

5. The battery device as claimed in claim 3, wherein the refrigerant heat exchange channel within the first heat exchange area and located on the same side of the first axis comprises a plurality of unit channels with the same or different structures, and the structures of two of the unit channels located on opposite sides of the first axis and in corresponding positions are symmetrical about the first axis.

6. The battery device as claimed in claim 5, wherein the refrigerant heat exchange channel in the second heat exchange region includes an inlet channel and an outlet channel, and the unit channels located on the same side of the first axis in the first heat exchange region share the same inlet channel to enter the refrigerant heat exchange medium, and share the same outlet channel to exit the refrigerant heat exchange medium.

7. The battery device as claimed in claim 6, wherein the unit flow channels located on different sides of the first axis enter the refrigerant heat exchange medium through different inlet flow channels and exit the refrigerant heat exchange medium through different outlet flow channels.

8. The battery device as claimed in claim 6 or 7, characterized in that, in the direction of the inlet flow channel, a plurality of unit channels located on the same side of the first axis are connected to the inlet flow channel in sequence from upstream to downstream, and the order in which any one of the unit channels is connected to the inlet flow channel in the plurality of unit channels on its side is marked as N, and the order marking N corresponding to two unit channels located on both sides of the first axis and symmetrically arranged is the same.

9. The battery device according to any one of claims 6-8, wherein the inlet channel has an inlet, and the connection position of two unit channels located on both sides of the first axis and symmetrically arranged on the inlet channel is equidistant from the inlet in the length extension direction of the inlet channel.

10. The battery device as claimed in claim 9, wherein the distance from the connection position of the unit flow channel on the inlet flow channel to the inlet in the length extension direction of the inlet flow channel is S, and the S values corresponding to the plurality of unit flow channels located on the same side of the first axis are arranged sequentially along a direction perpendicular to the first axis and arranged sequentially from near to far from the first axis.

11. The battery device according to any one of claims 5-10, wherein the unit flow channel includes an upstream flow channel and a downstream flow channel that are connected, the upstream flow channel and the downstream flow channel are parallel to the first axis, and the upstream flow channel and the downstream flow channel of two adjacent unit flow channels located on the same side of the first axis are arranged adjacently.

12. The battery device as claimed in claim 11, wherein the upstream channels of the two unit channels located on both sides of the first axis and adjacent to the first axis are arranged adjacently.

13. The battery device of claim 11, wherein the downstream channel of a single cell channel is located on the side of the cell channel away from the first axis.

14. The battery device according to any one of claims 11-13, wherein the unit flow channel further comprises a return flow channel communicating with the downstream flow channel of the unit flow channel, the return flow channel being used to connect with the refrigerant heat exchange channel in the second heat exchange region to allow the refrigerant heat exchange medium to flow out.

15. The battery device of claim 14, wherein the return flow channel includes a return section parallel to the first axis, and multiple return sections of multiple unit channels located on the same side of the first axis are arranged adjacently and located in the end region of the first heat exchange region away from the first axis, and the region of the first heat exchange region other than the end region is used for heat exchange with the battery cell assembly.

16. The battery device as claimed in claim 15, characterized in that,

In the direction perpendicular to the first axis:

The distance between adjacent recirculation sections located on the same side of the first axis is L1;

The upstream flow channel of the same unit flow channel includes multiple upstream branch channels parallel to the first axis, and the distance between adjacent upstream branch channels is L2;

The downstream flow channel of the same unit flow channel includes multiple downstream branch channels parallel to the first axis, and the distance between adjacent downstream branch channels is L3;

Therefore, L1 is less than L2 and L1 is less than L3.

17. The battery device according to any one of claims 1-16, wherein the battery cell assembly comprises a plurality of battery cells arranged along the first axial direction and along a direction perpendicular to the first axial direction.

18. The battery device according to any one of claims 1-17, wherein the battery device further comprises a housing having an accommodating space, the refrigerant heat exchange component being located within the accommodating space or serving as a side panel to form the housing, and the refrigerant heat exchange component being used to contact the battery cell assembly.

19. A heat exchange component, characterized in that it comprises the refrigerant heat exchange component according to any one of claims 1-18.

20. An electrical device, characterized in that it includes a battery device as described in any one of claims 1-18, the battery device being used to store or provide electrical energy.