WO2023142581A1 - 汇流排、电芯采集组件及电池模组 - Google Patents

汇流排、电芯采集组件及电池模组 Download PDF

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Publication number
WO2023142581A1
WO2023142581A1 PCT/CN2022/129614 CN2022129614W WO2023142581A1 WO 2023142581 A1 WO2023142581 A1 WO 2023142581A1 CN 2022129614 W CN2022129614 W CN 2022129614W WO 2023142581 A1 WO2023142581 A1 WO 2023142581A1
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WO
WIPO (PCT)
Prior art keywords
bus bar
battery
busbar
main body
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/129614
Other languages
English (en)
French (fr)
Inventor
张腾飞
汤杰
赵成明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Power Co Ltd
Original Assignee
Eve Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202220244992.2U external-priority patent/CN217158574U/zh
Priority claimed from CN202210113139.1A external-priority patent/CN114583398A/zh
Application filed by Eve Power Co Ltd filed Critical Eve Power Co Ltd
Priority to EP22826791.0A priority Critical patent/EP4243186A4/en
Priority to US18/148,778 priority patent/US12525688B2/en
Publication of WO2023142581A1 publication Critical patent/WO2023142581A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, for example, to a bus bar, a battery collection assembly and a battery module.
  • the battery module is the core component of the battery system.
  • a battery module includes a plurality of battery cells, and bus bars are usually used to electrically connect the multiple battery cells.
  • a plastic wire harness isolation board with reinforcing ribs is usually added between two adjacent bus bars to ensure that the gap between the bus bars Keep a safe distance.
  • this method will increase the weight of the battery system, making it difficult to fully utilize the internal space of the battery system. Due to the addition of the plastic wiring harness isolation board, the production and assembly procedures of the battery module are relatively complicated, and at the same time increase the production cost.
  • the application provides a bus bar, which has a simple structure and good versatility.
  • no plastic wire harness isolation board is used between two adjacent bus bars, which reduces the weight of the battery module.
  • the battery system occupies a small space, and the cells can be closely arranged, and the battery module formed by connecting multiple cells has a high energy density.
  • the embodiment of the present application provides a busbar, which is configured to electrically connect a plurality of batteries to form a battery pack, including:
  • each busbar body includes a positive electrode conductive part and a negative electrode conductive part, the positive electrode conductive part is arranged to be electrically connected to the positive electrode of one battery cell, and the negative electrode conductive part is arranged to be connected to the negative electrode of another battery cell Electrically connected, the positive conductive part and the negative conductive part are electrically connected through a connecting part, and an insulating layer is provided on the surface of the connecting part;
  • each base material there is at least one base material, through which two adjacent busbar main bodies are electrically connected, and an insulating layer is provided on the surface of each base material.
  • each base material is connected to the connecting portion of one of the two adjacent bus bar bodies, and the second end of each base material is connected to the connecting portion of the two adjacent bus bar bodies.
  • the connecting part of the other bus bar body in the bus bar body is connected to the first end of each base material.
  • two adjacent bus bar main bodies are arranged at intervals along a first direction, and are arranged with offsets along a second direction, and the first direction and the second direction are arranged at an included angle.
  • each base material includes a main body segment and two connecting segments, the two connecting segments are connected by the main body segment, and each connecting segment in the two connecting segments forms an included angle with the main body segment It is provided that a busbar main body is connected to a connection section of a substrate or a busbar main body is connected to two connection sections of a substrate.
  • a through hole is provided at the junction between each of the two connecting sections and the main body section.
  • the joint between each of the two connecting segments and the main body segment is rounded.
  • two adjacent bus bar main bodies are arranged at intervals along a first direction, and are arranged with offsets along a second direction, and the first direction and the second direction are arranged at an included angle.
  • the at least one base material and the plurality of bus bar bodies are connected to form a wave shape, and any bus bar body is located on a crest or a trough of a wave.
  • the at least one substrate and the plurality of busbar bodies are integrally formed.
  • each busbar body there is a height difference between the positive conductive part and the negative conductive part of each busbar body.
  • each substrate is provided with a first fusing portion.
  • a second fusing part is arranged on the connecting part.
  • the bus bar is a one-piece structure.
  • the embodiment of the present application provides a cell collection assembly, including pins and the bus bar according to any one of claims, at least one end of the bus bar is connected to a pin, and the pin is set For data connection with the battery management system.
  • the pin includes a first part and a second part arranged at an angle, the bus bar is connected to the first part, and the second part is configured to be connected to the battery management system .
  • the first portion is parallel to the end surfaces of the plurality of electric cores, and the second portion extends along the height direction of the plurality of electric cores.
  • the pin is connected with a signal acquisition element.
  • the signal acquisition element is a temperature sensor.
  • the pins are connected to a voltage signal collecting board.
  • the pins are arranged outside the battery pack.
  • the pin is a sheet structure.
  • the pins are connected to a bus bar main body at at least one of the two ends of the bus bar.
  • an embodiment of the present application provides a battery module, including a plurality of battery cells and at least one of the above-mentioned battery collection components, and a bus bar of the battery collection component electrically connects a plurality of the battery cells.
  • the busbar provided by this application is electrically connected to the positive pole of one cell by setting the positive conductive part, the negative conductive part is electrically connected to the negative pole of another cell, the positive conductive part and the negative conductive part are electrically connected through the connecting part, and then passed
  • the base material electrically connects multiple busbar bodies, so that multiple battery cells are connected in series or in parallel to form a battery pack.
  • An insulating layer is provided on the surface of the base material and the connection part to avoid conductive contact between the bus bars, reduce the risk of short circuit between the bus bars, abandon the use of plastic wire harness isolation boards, save the internal space of the battery system, and improve the battery system. At the same time, it improves the integration of the electrical connection of the battery cells, reduces the weight of the battery system, reduces the current loss, reduces the heat generation of the battery system, facilitates manufacturing and assembly, and has low production costs.
  • the cell acquisition component provided by this application includes the above-mentioned busbar.
  • the pins are directly connected to the battery management system (Battery Management System, BMS) for data connection without using a flexible circuit board (Flexible Circuit Board).
  • BMS Battery Management System
  • FPC Printed Circuit, FPC
  • Flexible Flat Cable Flexible Flat Cable, FFC
  • the battery module provided in this application adopts the above-mentioned cell collection component, connects multiple cells in series or in parallel through the bus bar of the cell collection component, and connects to the BMS through pins, which has a high degree of integration.
  • the connection between the bus bar and the battery cell is convenient and reliable, the structure is simple, the current loss is small, the degree of heat generation is low, and the safety performance is high.
  • the bus bars and pins are light in weight, saving the internal space of the battery system.
  • the structural form enables a plurality of battery cells to be arranged in a compact manner, greatly improving the energy density of the battery module, and the manufacturing cost of the battery module is low.
  • Fig. 1 is an assembly drawing of a bus bar and a battery cell provided by an embodiment of the present application
  • Fig. 2 is a schematic structural diagram of a bus provided by an embodiment of the present application.
  • Fig. 3 is an assembly diagram of the cell collection component and the cell provided by an embodiment of the present application.
  • Fig. 4 is a schematic structural diagram of a busbar provided by another embodiment of the present application.
  • Fig. 5 is an assembly diagram of a bus bar and a battery cell provided by an embodiment of the present application.
  • 100 battery cell; 110, positive pole; 120, negative pole; 200, main body of bus bar; 210, positive pole conductive part; 220, negative pole conductive part; 230, connection part; 201, first conductive part; 202, second conductive part; 300, base material; 310, main body section; 320, connection section; 330, through hole; 400, pin; 500, signal acquisition component; 600, voltage signal collection board.
  • first position and second position are two different positions, and "above”, “above” and “above” the first feature on the second feature include that the first feature is on the second feature. Directly above and obliquely above, or simply means that the first feature level is higher than the second feature. "Below”, “beneath” and “under” the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application depending on the specific circumstances.
  • FIG. 1 is an assembly diagram of a bus bar and a battery cell 100 provided in this embodiment.
  • FIG. 2 is a schematic structural diagram of the busbar provided in this embodiment. Referring to FIG. 1 and FIG. 2 , the busbar is configured to electrically connect a plurality of battery cells 100 to form a battery pack, and the busbar includes a plurality of busbar main bodies 200 and a base material 300 .
  • Each bus bar body 200 includes a positive electrode conductive part 210 and a negative electrode conductive part 220, the positive electrode conductive part 210 is electrically connected to the positive electrode 110 of one cell 100, the negative electrode conductive part 220 is electrically connected to the negative electrode 120 of the other cell 100, and the positive electrode
  • the conductive part 210 is electrically connected to the negative electrode conductive part 220 through the connection part 230 , and an insulating layer is provided on the surface of the connection part 230 .
  • Adjacent busbar bodies 200 are electrically connected through the base material 300 , and an insulating layer is also provided on the surface of the base material 300 .
  • the base material 300 is used as a current-passing part, and the two adjacent bus bar bodies 200 are electrically connected through the base material 300. Electrically connected, the negative electrode conductive portion 220 is electrically connected to the negative electrode 120 of another battery cell 100 , so that multiple battery cells 100 are connected in series or in parallel by bus bars to form a battery cell group.
  • the present application by disposing an insulating layer on the surface of the base material 300 and the connection portion 230 , the risk of short circuit due to contact between the bus bars can be effectively avoided, and the safety of the battery system is improved.
  • the arrangement of the insulating layer can replace the plastic wiring harness isolation plate in the related art, saves the internal space of the battery system, and thus effectively improves the energy density of the battery module of the battery system.
  • the insulation layer and the bus bar are integrated, which improves the integration of the electrical connection of the battery cell 100 and reduces the number of components, thereby reducing the weight of the battery system and reducing its heat generation. It also simplifies assembly and manufacturing. Reduce costs.
  • the insulating layer is an insulating film coated on the surface of the connecting portion 230 and the base material 300.
  • the insulating layer can also be made by spraying insulating materials on the surface of the connecting portion 230 and the base material 300, or can be made in other ways. As long as it is a structure that can insulate the connecting portion 230 and the base material 300, it is within the protection scope of the present application.
  • the overall busbar is a sheet structure, which can greatly reduce the weight of the busbar, reduce the overall weight of the battery module, and minimize the cost of the busbar in the battery system.
  • the occupied space is conducive to improving the energy density of the battery module.
  • the main body 200 of the bus bar is rectangular, and its corners are rounded to reduce stress concentration and increase the structural strength of the main body 200 of the bus bar.
  • the number of busbar main bodies 200 shown in FIG. 2 is seven, which can connect fourteen battery cells 100.
  • the number of busbar main bodies 200 can be three, five, nine, etc., as required It only needs to be set, and the shape of the bus bar main body 200 is not limited to a rectangle, and can be set to other shapes as required.
  • the material of the bus bar main body 200 may be metal materials such as aluminum (alloy), copper (alloy), nickel, or other conductive materials.
  • the bus bar main body 200 in this embodiment has a simple structure, is easy to process, and is easy to connect with the battery cell 100 .
  • connection between the positive conductive portion 210 of the bus bar body 200 and the positive electrode 110 of one cell 100 , and between the negative conductive portion 220 and the negative electrode 120 of the other cell 100 may be connected by welding. Since there is a height difference between the positive electrode 110 and the negative electrode 120 of the battery cell 100 , in order to match the structure of the battery cell 100 , there is also a height difference between the positive electrode conductive part 210 and the negative electrode conductive part 220 of the busbar body 200 .
  • connection portion 230 of the bus bar body 200 and the positive electrode conductive portion 210 of the bus bar body 200 are in the same plane, and the negative electrode conductive portion 220 of the bus bar body 200 and the connection portion 230 of the bus bar body 200 are stepped
  • the shape is arranged to facilitate the connection between the bus bar main body 200 and the battery cell 100 .
  • the pole is the positive pole 110 of the battery cell 100 , and in other embodiments, the pole can also be the negative pole 120 of the battery cell 100 .
  • Adjacent bus bar bodies 200 are arranged at intervals along the first direction, and are arranged at offsets along the second direction, and are arranged at an included angle between the first direction and the second direction.
  • the first direction is the width direction of the bus bar body 200
  • the second direction is the length direction of the bus bar body 200
  • the first direction is perpendicular to the second direction.
  • the two adjacent bus bar main bodies 200 are arranged in dislocation along their length direction, so that the connected multiple batteries 100 are alternately arranged in dislocation. It can be tightly spliced together, so as to make full use of the internal space of the battery system and improve the energy density of the battery module.
  • a plurality of busbar bodies 200 may also be aligned along the second direction, so that the connected battery cells 100 are arranged in a matrix.
  • the first end of the substrate 300 is connected to the connection portion 230 of one busbar body 200 , and the second end of the substrate 300 is connected to the connection portion 230 of the other busbar body 200 , so as to facilitate the installation of the insulating layer.
  • the base material 300 and the bus bar body 200 are connected to form a wave shape, and the bus bar body 200 is located on the crest or trough of the wave.
  • the busbar main body 200 can also be connected with the substrate 300 to form an in-line shape or other forms.
  • the base material 300 includes a main body section 310 and two connecting sections 320 .
  • the two connecting sections 320 are connected by the main section 310 .
  • the connecting section 320 and the main section 310 are arranged at an angle. Adopting this structural form can facilitate the cells 100 to be closely arranged.
  • the base material 300 may also be in an inline structure or other structural forms, as long as it is a structural form capable of electrically connecting adjacent busbar bodies 200 , it is within the protection scope of the present application.
  • a through hole 330 may be provided at the junction of the connection section 320 and the main body section 310, and the through hole 330 is provided for positioning and increasing structural strength.
  • the connection between the connecting section 320 and the main section 310 is rounded to reduce stress concentration and make the connection between the connecting section 320 and the main section 310 more reliable.
  • the material of the base material 300 may be metal materials such as aluminum (alloy), copper (alloy), nickel, or other conductive materials.
  • the materials of the base material 300 and the busbar main body 200 may be the same or different.
  • the base material 300 and the bus bar main body 200 can be integrally formed by stamping or other methods, or can be fixedly connected by welding or riveting.
  • a first fusing part can be provided on the base material 300.
  • the first fusing part can be fused by self-heating to quickly disconnect the connection between adjacent cells 100. Current, cutting off the current loop, thereby protecting the circuit and improving the safety of the battery system.
  • the first fusing part can be formed by making the component thin or coating it with a low-melting-point metal.
  • a second fusing part may be provided on the connection part 230, and the function of the second fusing part is the same as that of the first fusing part.
  • the manufacturing method of the second fusing part may be the same as or different from that of the first fusing part.
  • the busbar provided by this application is electrically connected to the positive pole of one cell by setting the positive conductive part, the negative conductive part is electrically connected to the negative pole of another cell, the positive conductive part and the negative conductive part are electrically connected through the connecting part, and then passed
  • the base material electrically connects multiple busbar bodies, so that multiple battery cells are connected in series or in parallel to form a battery pack.
  • An insulating layer is provided on the surface of the base material and the connection part to avoid conductive contact between the bus bars, reduce the risk of short circuit between the bus bars, abandon the use of plastic wire harness isolation boards, save the internal space of the battery system, and improve the battery system. At the same time, it improves the integration of the electrical connection of the battery cells, reduces the weight of the battery system, reduces the current loss, reduces the heat generation of the battery system, facilitates manufacturing and assembly, and has low production costs.
  • the present embodiment also provides a cell acquisition assembly, including a pin 400 and the above-mentioned busbar, at least one end of the busbar is connected to the pin 400, and the pin 400 is configured to be connected to a battery management system (Battery Management System) , BMS) data connection.
  • BMS Battery Management System
  • the pin 400 is a sheet structure, including a first part and a second part arranged at an angle, the bus bar is connected to the first part, and the BMS is connected to the second part.
  • the second part extends downward along the height direction of the battery cell 100 , and the pins 400 are arranged outside the battery pack.
  • the angle between the first part and the second part is not limited to 90°, and can also be 0°, 30°, 60°, etc., and the second part can also be arranged in two adjacent rows of cells 100 Between or in other positions, the specific structural form can be set according to actual use needs.
  • the pin 400 is connected with a signal acquisition element 500, and the signal acquisition element 500 may be one or more of a temperature sensor, a voltage acquisition element, a pressure sensor, and a humidity sensor.
  • the pin 400 is connected to a voltage signal collecting board 600 , and then connected to the BMS through the voltage signal collecting board 600 , so as to transmit the voltage signal collected by the signal collecting component 500 to the BMS.
  • the setting of pin 400 replaces the traditional flexible circuit board (Flexible Printed Circuit, FPC)/flexible flat cable (Flexible Flat Cable, FFC), thereby reducing the use of components, reducing the weight of the battery system, and saving the battery system interior space.
  • the pin 400 is made of conductive material, and can be integrally formed with the bus bar by stamping, or can be fixedly connected by welding or riveting.
  • the cell acquisition component provided by this application includes the above-mentioned bus bar. By setting pins at one end of the bus bar, the pins are used to directly connect with the BMS for data, without using FPC/FFC for switching, saving the space in the Z direction of the battery system. It is also beneficial to realize the lightweight of the battery system.
  • This embodiment also provides a battery module, which includes a plurality of battery cells 100 and at least one of the above-mentioned battery collection components, and a bus bar of the battery collection component electrically connects the multiple battery cells 100 .
  • Electrically connect a plurality of battery cells 100 through the busbar avoid conductive contact between the busbars by setting an insulating layer, reduce the risk of short circuit between the busbars, and replace the complicated busbar structure and plastic wiring harness in the related art Isolation panel structure.
  • the busbar at the output end of the cell pack can be cut from a complete busbar or produced separately.
  • the battery cell 100 and the BMS are connected for data through the pin 400, and the connection is convenient and reliable.
  • the battery module has the advantages of simple structure, less current loss, low heat generation and high safety performance.
  • the bus bar and the pin 400 adopt a sheet structure, which is light in weight and saves the internal space of the battery system.
  • the structural form of the bus bar enables a plurality of battery cells 100 to be arranged in a compact manner, greatly improving the energy density of the battery module and reducing the manufacturing cost of the battery module.
  • the battery module provided in this application adopts the above-mentioned cell collection component, connects multiple cells in series or in parallel through the bus bar of the cell collection component, and connects to the BMS through pins, which has a high degree of integration.
  • the connection between the bus bar and the battery cell is convenient and reliable, the structure is simple, the current loss is small, the degree of heat generation is low, and the safety performance is high.
  • the bus bars and pins are light in weight, saving the internal space of the battery system.
  • the structural form enables a plurality of battery cells to be arranged in a compact manner, greatly improving the energy density of the battery module, and the manufacturing cost of the battery module is low.
  • FIG. 4 is a schematic structural diagram of a bus bar provided by another embodiment.
  • FIG. 5 is an assembly diagram of a busbar and a battery cell 100 provided by an embodiment.
  • the busbar is configured to electrically connect a plurality of battery cells 100 to form a battery pack, and the busbar includes a plurality of busbar main bodies 200 , a base material 300 and pins 400 .
  • Each bus bar body 200 includes a first conductive part 201 and a second conductive part 202, the first conductive part 201 is electrically connected to the first electrode 110 of one battery cell 100, and the second conductive part 202 is connected to the second electrode 110 of another battery cell 100.
  • the two electrodes 120 are electrically connected, and the first conductive part 201 and the second conductive part 202 are electrically connected through the connecting part 230 .
  • Two adjacent busbar bodies 200 are electrically connected through the substrate 300 .
  • the pin 400 is connected to the bus body 200, and the pin 400 is configured to be connected to the BMS data.
  • the first conductive part 201 is a positive electrode conductive part
  • the second conductive part 202 is a negative electrode conductive part
  • the first electrode is a positive electrode
  • the second electrode is a negative electrode.
  • the first conductive part 201 is a negative electrode conductive part
  • the second conductive part 202 is a positive electrode conductive part
  • the first electrode is a negative electrode
  • the second electrode is a positive electrode, which can be set according to actual needs.
  • the above-mentioned bus bar by electrically connecting the first conductive part 201 of the bus bar main body 200 with the first electrode 110 of one cell 100, and electrically connecting the second conductive part 202 with the second electrode 120 of the other cell 100, through
  • the base material 300 electrically connects two adjacent bus bar bodies 200 , so as to realize the parallel connection or series connection of multiple battery cells 100 to form a battery cell group.
  • pins 400 By setting pins 400 on the main body of the bus bar 200, signal collection is realized.
  • the bus bar adopts this structural form, which has a simple structure and takes up little space.
  • the pin 400 can be connected to the BMS.
  • the pin 400 Through the pin 400, information such as the voltage and temperature of multiple cells 100 connected to the bus bar can be directly transmitted to the BMS, thereby It can replace the traditional FPC/FFC, thereby reducing the use of components and the weight of the battery system. At the same time, it saves the use of the Z-direction space of the battery system and improves the energy density of the battery system.
  • the overall busbar has a sheet structure, which can greatly reduce the weight of the busbar, reduce the overall weight of the battery module, and minimize the amount of time spent on the busbar in the battery system.
  • the occupied space is conducive to improving the energy density of the battery module.
  • the bus bar can be a one-piece structure, which is made by stamping or other processes, or it can be a split structure, and multiple parts are connected by welding or bonding.
  • the corners of the bus bar main body 200 are rounded, which can reduce stress concentration and increase the structural strength of the bus bar main body 200 .
  • the shape of the bus bar main body 200 is not limited thereto, and can be set in other shapes as required.
  • the bus bar body 200 can be made of aluminum (alloy), copper (alloy), nickel and other metal materials, or other conductive materials.
  • the bus bar main body 200 in this embodiment has a simple structure, is easy to process, and is easy to connect with the battery cell 100 .
  • the pin 400 is a sheet structure, including a first part and a second part, the first part and the second part are connected at an angle, the bus bar main body 200 is connected to the first part, and the battery management system is connected to the second part.
  • the first part is parallel to the end face of the cell 100, and the second part extends along the height direction of the cell 100, that is, the first part is perpendicular to the second part Connect to form an L shape.
  • the second part extends downward along the height direction of the battery cell 100 .
  • both the first part and the second part are in-line, and in other embodiments, they can also be in other shapes.
  • the angle between the first part and the second part can be 0°, and the connection forms a straight line, or it can be other angles, which can be set according to the internal space layout of the battery system.
  • the pin 400 is connected to a bus bar main body 200 at least one of the two ends of the bus bar, and the second part is arranged on the outside of the battery pack and connected to the connection part 230 of a bus bar main body 200, so as to facilitate the battery cell 100 and Signal acquisition components are connected.
  • the second part can also be arranged between two adjacent rows of battery cells 100 or at other positions, which can be set according to actual needs.
  • the pin 400 is made of conductive material, and can be integrally formed with the connecting portion 230 by stamping, or can be fixedly connected by welding or riveting.
  • an insulating layer is provided on the surface of the connecting portion 230 and the substrate 300 .
  • an insulating layer is provided on the surface of the base material 300 and the connection part 230, which improves the integration degree of the electrical connection of the battery cell 100, reduces the number of components used, thereby reducing the weight of the battery system and reducing its heat generation.
  • the insulating layer is an insulating film coated on the surface of the connecting portion 230 and the base material 300, such as a PET blue film, and the insulating layer can also be made by spraying an insulating material on the surface of the connecting portion 230 and the base material 300.
  • the insulating layer can be made in other ways, as long as it is a structure capable of insulating the connecting portion 230 and the base material 300 , it is within the protection scope of the present application.
  • connection between the first conductive part 201 and the battery cell 100 and between the second conductive part 202 and the battery cell 100 can be performed by welding. Since there is a height difference between the positive electrode 110 and the negative electrode 120 of the battery cell 100 , in order to match the structure of the battery cell 100 , the connecting portion 230 of the bus bar body 200 and the first conductive portion 201 of the bus bar body 200 are at the same height. In the plane, the second conductive portion 202 of the bus bar body 200 and the connection portion 230 of the bus bar body 200 are arranged in a stepped shape to facilitate the connection between the bus bar body 200 and the battery cell 100 .
  • Adjacent busbar bodies 200 are arranged at intervals along the first direction, and are arranged at offsets along the second direction, and the first direction and the second direction are arranged at an included angle.
  • the first direction is the width direction of the bus bar body 200
  • the second direction is the length direction of the bus bar body 200
  • the first direction is perpendicular to the second direction, that is, two adjacent bus bar bodies 200 are along the Its length direction is misaligned.
  • the internal space of the system improves the energy density of the battery module.
  • the first direction and the second direction are set as required.
  • the busbar main body 200 can also be arranged side by side along a straight line, so that the connected cell groups are arranged in a matrix.
  • the first end of the substrate 300 is connected to the connection portion 230 of one busbar body 200 , and the second end of the substrate 300 is connected to the connection portion 230 of the other busbar body 200 , so as to facilitate the installation of the insulating layer.
  • the base material 300 and the bus bar body 200 are connected to form a wave shape, and the bus bar body 200 is located on the crest or trough of the wave.
  • the base material 300 includes a main body section 310 and two connecting sections 320, the two connecting sections 320 are connected through the main section 310, the bus bar main body 200 is connected to the connecting section 320, the connecting section 320 and the main section 310 are arranged at an angle , so that the bus bar main body 200 can be dislocated.
  • the base material 300 may also be in an inline structure or other structural forms, as long as it is a structural form capable of electrically connecting adjacent busbar bodies 200 , it is within the protection scope of the present application.
  • Through holes 330 may be provided in the body section 310, the through holes 330 being provided for positioning and adding structural strength. Fillet treatment is performed at the junction of the main section 310 and the connecting section 320 to reduce stress concentration and make the connection between the connecting section 320 and the main section 310 more reliable.
  • the material of the base material 300 may be metal materials such as aluminum (alloy), copper (alloy), nickel, or other conductive materials.
  • the materials of the base material 300 and the busbar main body 200 may be the same or different.
  • the base material 300 and the bus bar main body 200 can be integrally formed by stamping, or can be fixedly connected by welding or riveting.
  • this embodiment also provides a cell collection assembly, including the above-mentioned bus bar and a signal collection component 500 , and the pin 400 is configured to be connected to the signal collection component 500 for data.
  • the signal acquisition element 500 can be a temperature sensor, or one or more of a voltage acquisition element, a pressure sensor, and a humidity sensor.
  • the signal acquisition element 500 is connected to the BMS through the pin 400 to output 100 information of the battery cell to BMS.
  • the pin 400 can be connected to the voltage signal summarizing board 600, and the voltage signal summarizing board 600 is connected to the BMS, so as to output the voltage information of the cell to the BMS.
  • This embodiment also provides a battery module, which includes a plurality of battery cells 100 and at least one of the above-mentioned battery collection components, and a bus bar of the battery collection component electrically connects the multiple battery cells 100 .
  • the BMS is connected through the pin 400, which has a high degree of integration.
  • the bus bar and the pin 400 adopt a thin sheet structure, which is light in weight and saves the internal space of the battery system.
  • the structural form of the bus bar can make a plurality of battery cells 100 arranged compactly, greatly improving the energy density of the battery module, and the manufacturing cost of the battery module is low.
  • the conductive contact between the bus bars is avoided by setting the insulating layer, the risk of short circuit is reduced, and the complex bus bar structure and the plastic wiring harness isolation plate structure in the related art are replaced.
  • the busbar at the output of the battery pack can be cut from a complete busbar or produced separately.
  • the battery cell 100 and the BMS are connected for data through the pin 400, and the connection is convenient and reliable.
  • the battery module has the advantages of simple structure, less current loss, low heat generation and high safety performance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请公开了一种汇流排、电芯采集组件及电池模组。该汇流排设置为将多个电芯电连接形成电芯组，该汇流排包括多个汇流排主体和至少一个基材。每个汇流排主体包括正极导电部和负极导电部，连接部与一个电芯的正极电连接，负极连接部与另一个电芯的负极电连接，正极导电部与负极导电部之间通过连接部电连接，连接部的表面设置有绝缘层。相邻两个汇流排主体之间通过一个基材电连接，每个基材的表面设置有绝缘层。该汇流排结构简单，通用性好，通过设置绝缘层，无需使用塑料线束隔离板，减轻了电池模组的重量，在电池系统中占用空间小，能够使电芯紧密排列，连接形成的电池模组能量密度大。

Description

汇流排、电芯采集组件及电池模组
本申请要求在2022年01月29日提交中国专利局、申请号为202220244992.2和202210113139.1的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，例如涉及一种汇流排、电芯采集组件及电池模组。
背景技术
电池模组是电池系统的核心部件。电池模组包括多个电芯，通常采用汇流排将多个电芯电连接。
在相关技术中，为了使相邻两个汇流排之间能够满足绝缘耐压的要求，通常会在相邻两个汇流排之间增设带有加强筋的塑料线束隔离板，保证汇流排之间保持安全距离。而这种方式将会增加电池系统的重量，难以充分利用电池系统的内部空间。由于增加了塑料线束隔离板，电池模组的生产和装配工序都比较复杂，同时增加生产成本。
发明内容
本申请提供一种汇流排，该汇流排结构简单，通用性好，通过设置绝缘层，在相邻两个汇流排之间无需使用塑料线束隔离板，减轻了电池模组的重量，汇流排在电池系统中占用空间小，能够使电芯紧密排列，多个电芯连接形成的电池模组能量密度大。
第一方面，本申请实施例提供一种汇流排，设置为将多个电芯电连接形成电芯组，包括：
多个汇流排主体，每个汇流排主体包括正极导电部和负极导电部，所述正极导电部设置为与一个电芯的正极电连接，所述负极导电部设置为与另一个电芯的负极电连接，所述正极导电部与所述负极导电部之间通过连接部电连接，所述连接部的表面设置有绝缘层；
至少一个基材，相邻两个汇流排主体之间通过一个基材电连接，每个基材的表面设置有绝缘层。
在一实施例中，每个基材的第一端连接于相邻两个汇流排主体中的一个汇 流排主体的连接部，所述每个基材的第二端连接于所述相邻两个汇流排主体中的另一个汇流排主体的连接部。
在一实施例中，相邻两个汇流排主体沿第一方向间隔设置，沿第二方向错位设置，所述第一方向与所述第二方向呈夹角设置。
在一实施例中，每个基材包括主体段和两个连接段，所述两个连接段通过主体段连接，所述两个连接段中的每个连接段与所述主体段呈夹角设置，一个汇流排主体连接于一个基材的连接段或一个汇流排主体连接于两个基材的连接段。
在一实施例中，所述两个连接段中的每个连接段与所述主体段的连接处设置通孔。
在一实施例中，所述两个连接段中的每个连接段与所述主体段的连接处做圆角处理。
在一实施例中，相邻两个汇流排主体沿第一方向间隔设置，沿第二方向错位设置，所述第一方向与所述第二方向呈夹角设置。
在一实施例中，所述至少一个基材和所述多个汇流排主体连接形成波浪形，任一个汇流排主体位于波峰或波谷上。
在一实施例中，所述至少一个基材和所述多个汇流排主体一体成型。
在一实施例中，每个汇流排主体的正极导电部与负极导电部之间具有高度差。
在一实施例中，每个基材上设置有第一熔断部。
在一实施例中，所述连接部上设置有第二熔断部。
在一实施例中，所述汇流排为一体式结构。
第二方面，本申请实施例提供一种电芯采集组件，包括引脚和如权利要求-任一项所述的汇流排，所述汇流排的至少一端连接有引脚，所述引脚设置为和电池管理系统数据连接。
在一实施例中，所述引脚包括呈夹角设置的第一部和第二部，所述汇流排连接于所述第一部，所述第二部设置为和所述电池管理系统连接。
在一实施例中，所述第一部与所述多个电芯的端面平行，所述第二部沿所述多个电芯的高度方向延伸。
在一实施例中，所述引脚连接有信号采集元件。
在一实施例中，所述信号采集元件为温度传感器。
在一实施例中，所述引脚连接有电压信号汇总板。
在一实施例中，所述引脚设置在所述电芯组的外侧。
在一实施例中，所述引脚为片状结构。
在一实施例中，所述引脚连接于所述汇流排两端中至少一端的一个汇流排主体上。
第三方面，本申请实施例提供一种电池模组，包括多个电芯和至少一个上述的电芯采集组件，所述电芯采集组件的汇流排将多个所述电芯电连接。
本申请的有益效果：
本申请提供的汇流排通过设置正极导电部与一个电芯的正极电连接，负极导电部和另一个电芯的负极电连接，正极导电部和负极导电部之间通过连接部电连接，再通过基材将多个汇流排主体之间电连接，从而将多个电芯进行串联或并联形成电芯组。在基材和连接部的表面设置绝缘层，避免汇流排之间导电接触，降低了汇流排之间的短路风险，摒弃了塑料线束隔离板的使用，节省电池系统的内部空间，从而提高电池系统的能量密度，同时，提高了电芯电连接的集成化程度，减轻电池系统的重量，减少电流损失，降低电池系统的发热程度，制造装配方便，生产成本低。
本申请提供的电芯采集组件包括上述的汇流排，通过在汇流排的一端设置引脚，采用引脚直接和电池管理系统(Battery Management System，BMS)进行数据连接，无需采用柔性线路板(Flexible Printed Circuit，FPC)/挠性扁平电缆(Flexible Flat Cable，FFC)进行转接，节省电池系统Z向空间的使用，也有利于实现电池系统的轻量化。
本申请提供的电池模组采用上述的电芯采集组件，通过电芯采集组件的汇流排将多个电芯进行串联或并联，通过引脚连接到BMS，集成化程度高。汇流排与电芯之间的连接方便可靠，结构简单，电流损失少，发热程度低，安全性能高。汇流排及引脚重量轻，节约电池系统的内部空间。其结构形式能够使多个电芯紧凑排列，极大程度上提高了电池模组的能量密度，电池模组的制造成本低。
附图说明
图1是本申请一实施例提供的汇流排与电芯的装配图；
图2是本申请一实施例提供的汇流排的结构示意图；
图3是本申请一实施例提供的电芯采集组件与电芯的装配图；
图4是本申请另一实施例提供的汇流排的结构示意图；
图5是本申请一实施例提供的汇流排与电芯的装配图。
图中：
100、电芯；110、正极；120、负极；200、汇流排主体；210、正极导电部；220、负极导电部；230、连接部；201、第一导电部；202、第二导电部；300、基材；310、主体段；320、连接段；330、通孔；400、引脚；500、信号采集元件；600、电压信号汇总板。
具体实施方式
在本申请的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位或以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、仅用于描述目的，而不能理解为指示或暗示相对重要性。其中，术语“第一位置”和“第二位置”为两个不同的位置，而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以视具体情况理解上述术语在本申请中的具体含义。
下面描述本申请的实施例，所述实施例的示例在附图中示出，其中相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
图1所示为本实施例提供的汇流排和电芯100的装配图。图2所示为本实施例提供的汇流排的结构示意图。参见图1和图2，该汇流排设置为将多个电芯100电连接形成电芯组，该汇流排包括多个汇流排主体200和基材300。每个汇 流排主体200均包括正极导电部210和负极导电部220，正极导电部210与一个电芯100的正极110电连接，负极导电部220与另一个电芯100的负极120电连接，正极导电部210与负极导电部220之间通过连接部230电连接，连接部230的表面设置有绝缘层。相邻汇流排主体200之间通过基材300电连接，基材300的表面也设置有绝缘层。
上述的汇流排，基材300作为过流件，通过基材300将相邻的两个汇流排主体200之间进行电连接，汇流排主体200的正极导电部210和一个电芯100的正极110电连接，负极导电部220和另一个电芯100的负极120电连接，从而多个电芯100被汇流排串联或并联形成电芯组。本申请通过在基材300和连接部230的表面设置绝缘层，能够有效避免汇流排之间因接触而发生短路的危险，提高了电池系统的安全性。绝缘层的设置能够替代相关技术中的塑料线束隔离板，节省了电池系统的内部空间，从而有效提高电池系统的电池模组的能量密度。同时，绝缘层和汇流排集成一体，提高了电芯100电连接的集成化程度，减少零部件的数量，从而减轻电池系统的重量，降低其发热程度，在装配制造方面也得到了简化，生产成本降低。
可选地，绝缘层为连接部230和基材300表面包覆的绝缘膜，也可以采用在连接部230和基材300的表面喷涂绝缘材料的方式制成绝缘层，也可以采用其他方式制成绝缘层，只要是能够对连接部230和基材300进行绝缘的结构，均在本申请的保护范围之内。
继续参见图1和图2，汇流排整体为片状结构，片状结构能够极大程度上减轻汇流排的重量，使电池模组整体重量减小，并且能够尽量减少汇流排在电池系统中所占用的空间，有利于提高电池模组的能量密度。本实施例中，汇流排主体200为长方形，其转角处进行圆角处理，以减小应力集中，增加汇流排主体200的结构强度。图2所示的汇流排主体200的数量为七个，能够连接十四个电芯100，在其他实施例中，汇流排主体200的数量可以为三个、五个、九个等，根据需要进行设置即可，汇流排主体200的形状不限于长方形，可以根据需要设置为其他形状。汇流排主体200的材质可以为铝(合金)、铜(合金)、镍等金属材质，也可以为其他导电材质。本实施例中的汇流排主体200的结构简单，容易加工，容易与电芯100进行连接。
汇流排主体200的正极导电部210与一个电芯100的正极110之间、负极导电部220与另一个电芯100的负极120之间可通过焊接的方式进行连接。由于电芯100的正极110与负极120之间具有高度差，因此，为了和电芯100的结构相配合，汇流排主体200的正极导电部210与负极导电部220之间也具有高度差。示例性的，汇流排主体200的连接部230与该汇流排主体200的正极 导电部210在同一平面内，该汇流排主体200的负极导电部220和该汇流排主体200的连接部230呈阶梯状设置，以方便汇流排主体200与电芯100之间的连接。在本实施例中，极柱为电芯100的正极110，在其他实施例中，极柱也可以为电芯100的负极120。
相邻汇流排主体200沿第一方向间隔设置，沿第二方向错位设置，第一方向与第二方向呈夹角设置。在本实施例中，第一方向为汇流排主体200的宽度方向，第二方向为汇流排主体200的长度方向，第一方向和第二方向垂直。相邻的两个汇流排主体200沿其长度方向错位设置，从而连接后的多个电芯100交替错位设置，由于一个电芯组内的多个电芯100错位排列，所以多个电芯100能够紧密地拼接在一起，从而充分利用电池系统的内部空间，提高电池模组的能量密度。在其他实施例中，多个汇流排主体200也可以沿第二方向对齐设置，使连接后的电芯100呈矩阵排列。
基材300的第一端连接于一个汇流排主体200的连接部230，基材300的第二端连接于另一个汇流排主体200的连接部230，从而方便绝缘层的设置。在本实施例中，基材300和汇流排主体200连接形成波浪形，汇流排主体200位于波峰或波谷上。在其他实施例中，汇流排主体200也可以和基材300连接形成一字型或其他形式。
基材300包括主体段310和两个连接段320，两个连接段320之间通过主体段310连接，连接段320与主体段310呈夹角设置，汇流排主体200连接于连接段320。采用这种结构形式，能够方便电芯100紧密排列。在其他实施例中，基材300也可以为一字型结构或其他结构形式，只要是能够将相邻汇流排主体200之间进行电连接的结构形式，均在本申请的保护范围之内。
本申请可以在连接段320与主体段310的连接处设置通孔330，通孔330设置为定位和增加结构强度。在连接段320与主体段310的连接处做圆角处理，达到减少应力集中的目的，使连接段320与主体段310的连接更加可靠。基材300的材质可以为铝(合金)、铜(合金)、镍等金属材质，也可以为其他导电材质。基材300与汇流排主体200的材质可以相同也可以不同。基材300与汇流排主体200可以采用冲压等方式一体成型，也可以通过焊接或铆接等方式进行固定连接。
可以在基材300上设置有第一熔断部，当电路出现短路等极端情况使电路温度过高时，第一熔断部能够通过自身发热而熔断，以迅速断开相邻电芯100之间的电流，切断电流回路，从而起到保护电路的作用，提高电池系统的安全性。第一熔断部可以通过将部件做薄或涂覆低熔点金属等方式形成。可选地，可以在连接部230设置第二熔断部，第二熔断部与第一熔断部的作用相同。第 二熔断部的制作方式可以和第一熔断部相同也可以不同。
本申请提供的汇流排通过设置正极导电部与一个电芯的正极电连接，负极导电部和另一个电芯的负极电连接，正极导电部和负极导电部之间通过连接部电连接，再通过基材将多个汇流排主体之间电连接，从而将多个电芯进行串联或并联形成电芯组。在基材和连接部的表面设置绝缘层，避免汇流排之间导电接触，降低了汇流排之间的短路风险，摒弃了塑料线束隔离板的使用，节省电池系统的内部空间，从而提高电池系统的能量密度，同时，提高了电芯电连接的集成化程度，减轻电池系统的重量，减少电流损失，降低电池系统的发热程度，制造装配方便，生产成本低。
参见图3，本实施例还提供一种电芯采集组件，包括引脚400和上述的汇流排，汇流排的至少一端连接有引脚400，引脚400设置为和电池管理系统(Battery Management System，BMS)数据连接。可选地，引脚400为片状结构，包括呈夹角设置的第一部和第二部，汇流排连接于第一部，BMS连接于第二部。为了方便电池系统内部的布局，第二部沿电芯100的高度方向向下延伸，并且引脚400设置在电芯组的外侧。在其他实施例中，第一部和第二部之间的夹角不限于90°，也可以为0°，30°60°等，第二部也可以设置在相邻的两排电芯100之间或设置在其他位置，具体结构形式根据实际的使用需要进行设置即可。
引脚400连接有信号采集元件500，信号采集元件500可以为温度传感器、电压采集件、压力传感器和湿度传感器等中的一种或几种。引脚400连接有电压信号汇总板600，通过电压信号汇总板600再连接于BMS，以将信号采集元件500采集到的电压信号传递至BMS。引脚400的设置代替了传统的柔性线路板(Flexible Printed Circuit，FPC)/柔性扁平电缆(Flexible Flat Cable，FFC)，从而减少了零部件的使用，减轻电池系统的重量，同时，节省电池系统的内部空间。可以理解地，引脚400采用导电材质，与汇流排之间可以采用冲压的方式一体成型，也可以通过焊接或铆接等方式进行固定连接。
本申请提供的电芯采集组件包括上述的汇流排，通过在汇流排的一端设置引脚，采用引脚直接和BMS进行数据连接，无需采用FPC/FFC进行转接，节省电池系统Z向空间的使用，也有利于实现电池系统的轻量化。
本实施例还提供一种电池模组，该电池模组包括多个电芯100和至少一个上述的电芯采集组件，电芯采集组件的汇流排将多个电芯100电连接。通过汇流排将多个电芯100之间进行电连接，通过设置绝缘层避免汇流排之间导电接触，降低了汇流排之间的短路风险，替代了相关技术中复杂的汇流排结构及塑 料线束隔离板结构。电芯组的输出端的汇流排可以由完整的汇流排裁剪制成或单独进行生产。通过引脚400将电芯100和BMS进行数据连接，连接方便可靠。该电池模组结构简单，电流损失少，发热程度低，安全性能高。汇流排及引脚400采用片状结构，重量轻，节约电池系统的内部空间。汇流排的结构形式能够使多个电芯100紧凑排列，极大程度上提高了电池模组的能量密度，降低了电池模组的制造成本。
本申请提供的电池模组采用上述的电芯采集组件，通过电芯采集组件的汇流排将多个电芯进行串联或并联，通过引脚连接到BMS，集成化程度高。汇流排与电芯之间的连接方便可靠，结构简单，电流损失少，发热程度低，安全性能高。汇流排及引脚重量轻，节约电池系统的内部空间。其结构形式能够使多个电芯紧凑排列，极大程度上提高了电池模组的能量密度，电池模组的制造成本低。
图4所示为另一实施例提供的汇流排的结构示意图。图5所示为一实施例提供的汇流排和电芯100的装配图。参见图4和图5，该汇流排设置为将多个电芯100电连接形成电芯组，该汇流排包括多个汇流排主体200、基材300和引脚400。每个汇流排主体200包括第一导电部201和第二导电部202，第一导电部201与一个电芯100的第一电极110电连接，第二导电部202与另一个电芯100的第二电极120电连接，第一导电部201与第二导电部202之间通过连接部230电连接。相邻两个汇流排主体200之间通过基材300电连接。引脚400连接于汇流排主体200，引脚400设置为和BMS数据连接。在本实施例中，第一导电部201为正极导电部，第二导电部202为负极导电部，第一电极为正极，第二电极为负极。在其他实施例中，第一导电部201为负极导电部，第二导电部202为正极导电部，第一电极为负极，第二电极为正极，可依据实际需求来设置。
上述的汇流排，通过将汇流排主体200的第一导电部201和一个电芯100的第一电极110电连接，第二导电部202和另一个电芯100的第二电极120电连接，通过基材300将相邻的两个汇流排主体200之间进行电连接，从而实现了多个电芯100的并联或串联，形成了电芯组。通过在汇流排主体200上设置引脚400，实现信号的采集。汇流排采用这种结构形式，结构简单，占用空间小，引脚400能够与BMS相连，通过引脚400可以将汇流排连接的多个电芯100的电压及温度等信息直接传递到BMS，从而能够取代传统的FPC/FFC，从而减少了零部件的使用，减轻电池系统的重量，同时，节省电池系统Z向空间的使用，提高了电池系统的能量密度。
继续参见图4和图5，汇流排整体为片状结构，片状结构能够极大程度上减轻汇流排的重量，使电池模组整体重量减小，并且能够尽量减少汇流排在电池 系统中所占用的空间，有利于提高电池模组的能量密度。汇流排可以为一体式结构，通过冲压或其他工艺制作成，也可以为分体式结构，多个部件之间通过焊接或粘接等方式连接。本实施例中，汇流排主体200的转角处进行圆角处理，其转角处进行圆角处理能够减小应力集中，增加汇流排主体200的结构强度。当然，汇流排主体200的形状不限于此，可以根据需要设置为其他形状。汇流排主体200的材质可以为铝(合金)、铜(合金)、镍等金属材质，或其他导电材质。本实施例中的汇流排主体200的结构简单，容易加工，容易与电芯100进行连接。
引脚400为片状结构，包括第一部和第二部，第一部和第二部呈夹角连接，汇流排主体200连接在第一部，电池管理系统连接在第二部。在本实施例中，为了方便电池系统内多个部件的布局，第一部和电芯100的端面平行，第二部沿电芯100的高度方向延伸，即，第一部与第二部垂直连接形成L型。可选地，根据电池系统内部空间布局，第二部沿电芯100的高度方向向下延伸。在本实施例中，第一部和第二部均为一字型，在其他实施例中，也可以为其他形状。第一部与第二部之间的夹角可以为0°，连接形成一字型，也可以为其他角度，根据电池系统内部空间布局进行设置即可。引脚400连接于汇流排两端中至少一端的一个汇流排主体200上，第二部设置在电芯组的外侧，连接于一个汇流排主体200的连接部230上，以方便电芯100和信号采集元件进行连接。在其他实施例中，第二部也可以设置在相邻的两排电芯100之间或设置在其他位置，根据实际需要进行设置即可。引脚400采用导电材质，与连接部230之间可以采用冲压的方式一体成型，也可以通过焊接或铆接等方式进行固定连接。
为有效避免汇流排之间因接触而发生短路的危险，在连接部230和基材300的表面设置绝缘层。通过在基材300和连接部230的表面设置绝缘层，提高了电池系统的安全性。绝缘层的设置能够替代相关技术中的塑料线束隔离板，节省了电池系统的内部空间，从而有效提高电池系统的电池模组的能量密度。同时，绝缘层设置在基材300和连接部230的表面，提高了电芯100电连接的集成化程度，减少了零部件的使用数量，从而减轻电池系统的重量，降低其发热程度，在装配制造方面也得到了简化，生产成本降低。可选地，绝缘层为连接部230和基材300表面包覆的绝缘膜，如PET蓝膜，也可以采用在连接部230和基材300的表面喷涂绝缘材料的方式制成绝缘层，也可以采用其他方式制成绝缘层，只要是能够对连接部230和基材300进行绝缘的结构，均在本申请的保护范围之内。
第一导电部201与电芯100之间、第二导电部202与电芯100之间可通过焊接的方式进行连接。由于电芯100的正极110与负极120之间具有高度差，因此，为了和电芯100的结构相配合，汇流排主体200的连接部230与该汇流 排主体200的第一导电部201在同一平面内，该汇流排主体200的第二导电部202和该汇流排主体200的连接部230呈阶梯状设置，以方便汇流排主体200与电芯100之间的连接。
相邻汇流排主体200沿第一方向间隔设置，沿第二方向错位设置，第一方向与所述第二方向呈夹角设置。在本实施例中，第一方向为汇流排主体200宽度方向，第二方向为汇流排主体200的长度方向，第一方向和第二方向垂直，即，相邻的两个汇流排主体200沿其长度方向错位设置。采用这种结构设计，连接后的多个电芯100交替错位设置，将一个电芯组内的多个电芯100错位排列，使多个电芯100能够紧密地拼接在一起，从而充分利用电池系统的内部空间，提高电池模组的能量密度。在其他实施例中，第一方向和第二方向根据需要进行设置，当然，汇流排主体200也可以沿一条直线并排设置，使连接后的电芯组呈矩阵型排列。
基材300的第一端连接于一个汇流排主体200的连接部230，基材300的第二端连接于另一个汇流排主体200的连接部230，从而方便绝缘层的设置。在本实施例中，基材300和汇流排主体200连接形成波浪形，汇流排主体200位于波峰或波谷上。基材300包括主体段310和两个连接段320，两个连接段320之间通过主体段310连接，汇流排主体200连接于所述连接段320，连接段320与主体段310呈夹角设置，从而汇流排主体200能够错位设置。在其他实施例中，基材300也可以为一字型结构或其他结构形式，只要是能够将相邻汇流排主体200之间进行电连接的结构形式，均在本申请的保护范围之内。
可以在主体段310上设置通孔330，通孔330设置为定位和增加结构强度。在主体段310和连接段320的连接处进行圆角处理，达到减少应力集中的目的，使连接段320与主体段310的连接更加可靠。基材300的材质可以为铝(合金)、铜(合金)、镍等金属材质，也可以为其他导电材质。基材300与汇流排主体200的材质可以相同也可以不同。基材300与汇流排主体200可以采用冲压的方式一体成型，也可以通过焊接或铆接等方式进行固定连接。
继续参见图5，本实施例还提供一种电芯采集组件，包括上述的汇流排和信号采集元件500，引脚400设置为和信号采集元件500数据连接。信号采集元件500可以为温度传感器，也可以为电压采集件、压力传感器和湿度传感器等中的一种或几种，信号采集件500通过引脚400连接到BMS，以将电芯的100信息输出至BMS。引脚400可连接电压信号汇总板600，电压信号汇总板600连接到BMS，从而将电芯的电压信息输出至BMS。
本实施例还提供一种电池模组，该电池模组包括多个电芯100和至少一个上述的电芯采集组件，电芯采集组件的汇流排将多个电芯100电连接。通过引 脚400连接BMS，集成化程度高，汇流排及引脚400采用薄片结构，重量轻，节约电池系统的内部空间。汇流排的结构形式能够使多个电芯100紧凑排列，极大程度上提高了电池模组的能量密度，电池模组的制造成本低。通过设置绝缘层避免汇流排之间导电接触，降低了短路风险，替代了相关技术中复杂的汇流排结构及塑料线束隔离板结构。电芯组输出端的汇流排可以由完整的汇流排裁剪制成或单独进行生产。通过引脚400将电芯100和BMS进行数据连接，连接方便可靠。该电池模组结构简单，电流损失少，发热程度低，安全性能高。

Claims (22)

  1. 一种汇流排，设置为将多个电芯(100)电连接形成电芯组，包括：
    多个汇流排主体(200)，每个汇流排主体(200)包括正极导电部(210)和负极导电部(220)，所述正极导电部(210)设置为与一个电芯(100)的正极(110)电连接，所述负极导电部(220)设置为与另一个电芯(100)的负极(120)电连接，所述正极导电部(210)与所述负极导电部(220)之间通过连接部(230)电连接，所述连接部(230)的表面设置有绝缘层；
    至少一个基材(300)，相邻两个汇流排主体(200)之间通过一个基材(300)电连接，每个基材(300)的表面设置有绝缘层。
  2. 根据权利要求1所述的汇流排，其中，每个基材(300)的第一端连接于相邻两个汇流排主体(200)中的一个汇流排主体(200)的连接部(230)，所述每个基材(300)的第二端连接于所述相邻两个汇流排主体(200)中的另一个汇流排主体(200)的连接部(230)。
  3. 根据权利要求1所述的汇流排，其中，每个基材(300)包括主体段(310)和两个连接段(320)，所述两个连接段(320)通过主体段(310)连接，所述两个连接段(320)中的每个连接段(320)与所述主体段(310)呈夹角设置，每个连接段(320)连接于一个汇流排主体(200)。
  4. 根据权利要求3所述的汇流排，其中，所述两个连接段(320)中的每个连接段(320)与所述主体段(310)的连接处设置通孔(330)。
  5. 根据权利要求3所述的汇流排，其中，所述两个连接段(320)中的每个连接段(320)与所述主体段(310)的连接处做圆角处理。
  6. 根据权利要求1-5任一项所述的汇流排，其中，相邻两个汇流排主体(200)沿第一方向间隔设置，沿第二方向错位设置，所述第一方向与所述第二方向呈夹角设置。
  7. 根据权利要求1-5任一项所述的汇流排，其中，所述至少一个基材(300)和所述多个汇流排主体(200)连接形成波浪形，任一个汇流排主体(200)位于波峰或波谷上。
  8. 根据权利要求1-5任一项所述的汇流排，其中，所述至少一个基材(300)和所述多个汇流排主体(200)一体成型。
  9. 根据权利要求1-5任一项所述的汇流排，其中，每个汇流排主体(200)的正极导电部(210)与负极导电部(220)之间具有高度差。
  10. 根据权利要求1-5任一项所述的汇流排，其中，每个基材(300)上设置有第一熔断部。
  11. 根据权利要求1-5任一项所述的汇流排，其中，所述连接部(230)上设置有第二熔断部。
  12. 根据权利要求1所述的汇流排，其中，所述汇流排为一体式结构。
  13. 一种电芯采集组件，包括引脚(400)和如权利要求1-12任一项所述的汇流排，所述汇流排的至少一端连接有引脚(400)，所述引脚(400)设置为和电池管理系统数据连接。
  14. 根据权利要求13所述的电芯采集组件，其中，所述引脚(400)包括呈夹角设置的第一部和第二部，所述汇流排连接于所述第一部，所述第二部设置为和所述电池管理系统连接。
  15. 根据权利要求14所述的电芯采集组件，其中，所述第一部与所述多个电芯(100)的端面平行，所述第二部沿所述多个电芯(100)的高度方向延伸。
  16. 根据权利要求13所述的电芯采集组件，其中，所述引脚(400)连接有信号采集元件(500)。
  17. 根据权利要求16所述的电芯采集组件，其中，所述信号采集元件(500)为温度传感器。
  18. 根据权利要求13所述的电芯采集组件，其中，所述引脚(400)连接有电压信号汇总板(600)。
  19. 根据权利要求13所述的电芯采集组件，其中，所述引脚(400)设置在所述电芯组的外侧。
  20. 根据权利要求13所述的电芯采集组件，其中，所述引脚(400)为片状结构。
  21. 根据权利要求13所述的电芯采集组件，其中，所述引脚(400)连接于所述汇流排两端中至少一端的一个汇流排主体(200)上。
  22. 一种电池模组，包括多个电芯(100)和至少一个如权利要求13-21任一项所述的电芯采集组件，所述电芯采集组件的汇流排将所述多个电芯(100)电连接。
PCT/CN2022/129614 2022-01-29 2022-11-03 汇流排、电芯采集组件及电池模组 Ceased WO2023142581A1 (zh)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117293489A (zh) * 2023-10-13 2023-12-26 惠州亿纬锂能股份有限公司 电池模块及用电设备
WO2025031223A1 (zh) * 2023-08-09 2025-02-13 惠州亿纬锂能股份有限公司 电池模组
CN119852660A (zh) * 2024-08-28 2025-04-18 北京车和家汽车科技有限公司 采样单元、采样组件以及电池包
WO2025081850A1 (zh) * 2023-10-20 2025-04-24 惠州亿纬锂能股份有限公司 一种汇流排结构、ccs组件及电池模组
WO2025208834A1 (zh) * 2024-04-02 2025-10-09 惠州亿纬锂能股份有限公司 电池模组及电池包

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110492278A (zh) * 2019-07-25 2019-11-22 孚能科技(赣州)股份有限公司 汇流排和具有该汇流排的电池模组、电池系统和电动车辆
CN111129413A (zh) * 2020-04-01 2020-05-08 惠州亿纬锂能股份有限公司 电池模组加热采集装置、电池模组及车辆
CN214754065U (zh) * 2021-03-30 2021-11-16 湖北亿纬动力有限公司 一种集成化汇流排连接的电池模组
CN113764832A (zh) * 2021-09-30 2021-12-07 蜂巢能源科技有限公司 汇流排组件及具有其的电池模组
CN215220933U (zh) * 2021-03-30 2021-12-17 湖北亿纬动力有限公司 一种集成化汇流排
CN215299453U (zh) * 2021-05-18 2021-12-24 福建飞毛腿动力科技有限公司 一种提高汇流排通用性和安全性的结构
CN114583398A (zh) * 2022-01-29 2022-06-03 湖北亿纬动力有限公司 一种汇流排、电芯采集组件及电池模组
CN217158574U (zh) * 2022-01-29 2022-08-09 湖北亿纬动力有限公司 一种汇流排、电芯采集组件及电池模组

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110492278A (zh) * 2019-07-25 2019-11-22 孚能科技(赣州)股份有限公司 汇流排和具有该汇流排的电池模组、电池系统和电动车辆
CN111129413A (zh) * 2020-04-01 2020-05-08 惠州亿纬锂能股份有限公司 电池模组加热采集装置、电池模组及车辆
CN214754065U (zh) * 2021-03-30 2021-11-16 湖北亿纬动力有限公司 一种集成化汇流排连接的电池模组
CN215220933U (zh) * 2021-03-30 2021-12-17 湖北亿纬动力有限公司 一种集成化汇流排
CN215299453U (zh) * 2021-05-18 2021-12-24 福建飞毛腿动力科技有限公司 一种提高汇流排通用性和安全性的结构
CN113764832A (zh) * 2021-09-30 2021-12-07 蜂巢能源科技有限公司 汇流排组件及具有其的电池模组
CN114583398A (zh) * 2022-01-29 2022-06-03 湖北亿纬动力有限公司 一种汇流排、电芯采集组件及电池模组
CN217158574U (zh) * 2022-01-29 2022-08-09 湖北亿纬动力有限公司 一种汇流排、电芯采集组件及电池模组

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025031223A1 (zh) * 2023-08-09 2025-02-13 惠州亿纬锂能股份有限公司 电池模组
CN117293489A (zh) * 2023-10-13 2023-12-26 惠州亿纬锂能股份有限公司 电池模块及用电设备
WO2025081850A1 (zh) * 2023-10-20 2025-04-24 惠州亿纬锂能股份有限公司 一种汇流排结构、ccs组件及电池模组
WO2025208834A1 (zh) * 2024-04-02 2025-10-09 惠州亿纬锂能股份有限公司 电池模组及电池包
CN119852660A (zh) * 2024-08-28 2025-04-18 北京车和家汽车科技有限公司 采样单元、采样组件以及电池包

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