WO2024141083A1 - 电池包 - Google Patents

电池包 Download PDF

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Publication number
WO2024141083A1
WO2024141083A1 PCT/CN2023/143564 CN2023143564W WO2024141083A1 WO 2024141083 A1 WO2024141083 A1 WO 2024141083A1 CN 2023143564 W CN2023143564 W CN 2023143564W WO 2024141083 A1 WO2024141083 A1 WO 2024141083A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow channel
opening
filter
coolant
battery pack
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/CN2023/143564
Other languages
English (en)
French (fr)
Inventor
曲凡多
杨振宇
张德民
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.)
Svolt Energy Technology Co Ltd
Original Assignee
Svolt Energy Technology 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
Application filed by Svolt Energy Technology Co Ltd filed Critical Svolt Energy Technology Co Ltd
Priority to EP23910996.0A priority Critical patent/EP4447199B1/en
Publication of WO2024141083A1 publication Critical patent/WO2024141083A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • 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, and in particular to a battery pack.
  • the present application aims to solve at least one of the technical problems existing in the prior art.
  • one purpose of the present application is to provide a battery pack, in which the coolant in the battery pack is filtered to prevent impurities in the coolant from contacting the battery cells, reduce the risk of short circuit, and improve the safety of the battery pack.
  • the battery pack of the embodiment of the present application includes: a shell, the shell defines a accommodating cavity, the shell has a side wall; a battery cell, the battery cell is placed in the accommodating cavity; a coolant, the coolant is contained in the accommodating cavity, and the battery cell is at least partially immersed in the coolant; wherein the side wall defines a first flow channel and a second flow channel, the first flow channel and the second flow channel are connected through a connecting port, a filter is provided at the connecting port, the filter can allow the coolant to flow and block impurities; the side wall is provided with a first opening and a second opening, the first opening is connected to the first flow channel, and the second opening is connected to the second flow channel, and the coolant can flow from the second flow channel to the first flow channel.
  • connection port includes a first connection port
  • the filter includes a first filter located at the first connection port
  • the installation port includes a first installation port through which the first filter can pass, and the first installation port is arranged adjacent to the first connection port
  • the mounting plate includes a first mounting plate that closes the first mounting port, and the first opening is formed on the first mounting plate.
  • connection port includes a second connection port
  • the filter includes a second filter located at the second connection port
  • the installation port includes a second installation port through which the second filter can pass, and the second installation port is arranged adjacent to the second connection port
  • the mounting plate includes a second mounting plate that closes the second mounting port, and the second opening is formed on the second mounting plate.
  • a plurality of micropores are formed on the side wall, and the micropores are connected to at least one of the first flow channel and the second flow channel.
  • a barrier membrane is provided on the surface of the micropores, and the barrier membrane allows the coolant to flow and blocks impurities.
  • FIG1 is a schematic diagram of the structure of a battery pack according to an embodiment of the present application.
  • FIG2 is a schematic diagram of the structure of a battery pack after some cells are hidden according to an embodiment of the present application
  • FIG3 is a schematic diagram of the structure of the hidden mounting plate according to the example shown in FIG2 ;
  • FIG4 is a schematic structural diagram of a first mounting plate of a battery pack according to an embodiment of the present application.
  • FIG5 is a schematic structural diagram of a second mounting plate of a battery pack according to an embodiment of the present application.
  • FIG6 is a top view of the battery pack according to the example shown in FIG2 ;
  • Fig. 7 is a cross-sectional view taken along line A-A according to the example shown in Fig. 6;
  • FIG8 is a top view of the battery pack according to the example shown in FIG1 ;
  • FIG9 is a front view of the battery pack according to the example shown in FIG1 ;
  • Fig. 10 is a B-B cross-sectional view according to the example shown in Fig. 9;
  • FIG11 is a partial enlarged view of the C region according to the example shown in FIG10 ;
  • FIG. 12 is a schematic diagram of the structure of a battery pack according to a specific embodiment of the present application.
  • Battery pack 100 Shell 1; accommodating cavity 10; side wall 11; mounting opening 110; first mounting opening 111; second mounting opening 112; micro hole 12; Battery cell 2; First flow channel 31; second flow channel 32; clamping wall 33; first connection port 341; second connection port 342; Mounting plate 4; first mounting plate 41; first opening 411; partition plate 412; second mounting plate 42; second opening 421; The first filter screen 51; the second filter screen 52; the horizontal screen 521; the inclined screen 522.
  • a battery pack 100 according to an embodiment of the present application is described below with reference to FIGS. 1 to 12 .
  • the battery pack 100 of the embodiment of the present application it includes: a shell 1, a battery cell 2 and a coolant.
  • the shell 1 defines a accommodating cavity 10.
  • the shell 1 has a side wall 11.
  • the battery cell 2 is placed in the accommodating cavity 10.
  • the coolant is contained in the accommodating cavity 10, and the battery cell 2 is at least partially immersed in the coolant.
  • the shell 1 plays a supporting and protective role.
  • a plurality of battery cells 2 are stacked in the accommodating cavity 10 formed by the shell 1, and the shell 1 protects the battery cell 2 inside.
  • the coolant is contained in the accommodating cavity 10, and the battery cell 2 is at least partially immersed in the coolant.
  • the coolant is in direct contact with the battery cell 2 to dissipate the heat of the battery cell 2, and the direct contact between the coolant and the battery cell 2 can also play a certain insulating role, thereby improving the safety of the battery pack 100.
  • the housing 1 of the battery pack 100 includes a plurality of side walls 11, and a first flow channel 31 and a second flow channel 32 are defined inside the side walls 11.
  • the first flow channel 31 and the second flow channel 32 are connected through a connection port, and the coolant can flow between the first flow channel 31 and the second flow channel 32.
  • a first opening 411 and a second opening 421 are provided on the side wall 11, wherein the first opening 411 is connected to the first flow channel 31, and the second opening 421 is connected to the second flow channel 32, and the coolant can flow between the first flow channel 31, the accommodating cavity 10, and the second flow channel 32.
  • the coolant in the battery pack 100 flows in the order of the first flow channel 31, the accommodating chamber 10, the second flow channel 32, and the first flow channel 31.
  • the coolant flows from the first flow channel 31 to the accommodating chamber 10 through the first opening 411.
  • the coolant flows to the first flow channel 31 through the connecting port.
  • the impurities contained in the coolant are blocked by the filter and remain in the second flow channel 32.
  • the coolant flowing from the first flow channel 31 to the accommodating chamber 10 is a pure coolant without impurities.
  • the impurities contained in the coolant gradually accumulate in the second flow channel 32, thereby effectively reducing the impurity content of the coolant in the accommodating chamber 10, reducing the risk of impurities contacting the battery cell 2, and improving the safety of the battery pack 100.
  • the first flow channel 31 and the second flow channel 32 are defined inside the side wall 11, and a filter is provided at the connection port between the first flow channel 31 and the second flow channel 32, which allows the coolant to flow and blocks impurities.
  • a filter is provided at the connection port between the first flow channel 31 and the second flow channel 32, which allows the coolant to flow and blocks impurities.
  • the impurities contained in the coolant gradually accumulate in the second flow channel 32, thereby effectively reducing the impurity content of the coolant in the accommodating cavity 10, reducing the risk of impurities contacting the battery cell 2, and improving the battery pack 100. safety of use.
  • the shell 1 of the battery pack 100 includes four side walls 11.
  • a first flow channel 31 and a second flow channel 32 may be defined inside one of the side walls 11, and the coolant flows only between the first flow channel 31, the second flow channel 32 and the accommodating chamber 10 of this side wall 11. It is also possible that the first flow channel 31 and the second flow channel 32 are defined in multiple side walls 11, and the coolant can flow between multiple different first flow channels 31, different second flow channels 32 and the accommodating chamber 10, which also falls within the protection scope of the present application.
  • the coolant flowing from different first flow channels 31 to the accommodating chamber 10 is pure coolant without impurities, and the impurities contained in the coolant are accumulated in the multiple second flow channels 32, thereby effectively reducing the impurity content of the coolant in the accommodating chamber 10.
  • a first flow channel 31 and a second flow channel 32 are defined in two opposite first side walls 11 and second side walls 11 , and filters are provided at the connection ports between the corresponding first flow channels 31 and second flow channels 32 , so that the coolant can flow between different first flow channels 31 , different second flow channels 32 and the accommodating chamber 10 .
  • the coolant flowing from the first flow channel 31 in the first side wall 11 and the first flow channel 31 in the second side wall 11 to the accommodating chamber 10 is pure coolant without impurities.
  • the impurities contained in the coolant are accumulated in the second flow channel 32 in the first side wall 11 and the second flow channel 32 in the second side wall 11 as they flow, which can effectively reduce the impurity content of the coolant in the accommodating chamber 10 .
  • the battery pack 100 also includes a pump assembly, which drives the coolant from the second flow channel 32 to the first flow channel 31, and makes the coolant in the battery pack 100 flow in the order of the first flow channel 31, the accommodating cavity 10, the second flow channel 32, and the first flow channel 31, so as to avoid the backflow of the coolant and improve the working stability of the battery pack 100.
  • a pump assembly which drives the coolant from the second flow channel 32 to the first flow channel 31, and makes the coolant in the battery pack 100 flow in the order of the first flow channel 31, the accommodating cavity 10, the second flow channel 32, and the first flow channel 31, so as to avoid the backflow of the coolant and improve the working stability of the battery pack 100.
  • the first flow channel 31 is located above the second flow channel 32. After the coolant flows along the second opening 421 to the second flow channel 32, impurities are more easily deposited in the second flow channel 32 under the action of gravity.
  • the battery pack 100 of the present application is provided with a filter at the connection port between the first flow channel 31 and the second flow channel 32, so as to filter and purify the coolant when the coolant flows from the second flow channel 32 to the first flow channel 31.
  • the setting position and number of this connection port can be selected according to actual needs.
  • a mounting opening 110 through which a filter can pass is provided on the side wall 11, and the mounting opening 110 is provided adjacent to the connection opening.
  • the shell 1 of the battery pack 100 protects the internal battery cell 2, and the connection opening is processed between the first flow channel 31 and the second flow channel 32 inside the side wall 11, and the processing method of providing a filter at the connection opening is relatively difficult, which reduces the manufacturing efficiency. Therefore, in some embodiments, As shown in Figures 2 and 3, an installation port 110 is opened on the side wall 11, and the installation port 110 is connected to the first flow channel 31 and/or the second flow channel 32. Subsequently, a connecting port is set and processed at the opened installation port 110, and a filter is installed at the connecting port at the soy sauce installation port 110, which can improve the processing efficiency of the battery pack 100 of the present application.
  • an installation port 110 is opened on the side wall 11, and a mounting plate 4 for closing the installation port 110 is also provided on the side wall 11.
  • the installation port 110 is provided on the side wall 11 to facilitate the opening of the connecting port and the installation of the filter, and the installation port 110 is connected to the first flow channel 31 and/or the second flow channel 32. After the connecting port is opened and the filter is installed, the installation port 110 can be closed by providing the mounting plate 4 to avoid mixing of the coolant.
  • the installation port 110 can be connected to the first flow channel 31, and the installation port 110 can also be connected to the second flow channel 32.
  • the installation port 110 can also be connected to the first flow channel 31 and the second flow channel 32 at the same time.
  • the installation port 110 is set to open a connection port and install a filter. The specific layout position and number of the installation port 110 can be selected according to actual needs.
  • a mounting opening 110 is opened on the side wall 11, and a mounting plate 4 for closing the mounting opening 110 is also provided on the side wall 11, and the filter needs to be arranged at the connecting port, and the connecting port is arranged near the mounting opening 110, so that the filter can be directly fixedly connected to the mounting plate 4, and the installation of the filter and the installation of the mounting plate 4 are combined into one action.
  • the filter is directly installed in place, thereby further improving the processing efficiency of the battery pack 100 of the present application.
  • the mounting plate 4 is detachable from the side wall 11, and the mounting plate 4 is detachably connected to the side wall 11, which facilitates the removal and replacement of the filter and increases the service life.
  • the side wall 11 is constructed into a multi-cavity structure by extruding a profile or rolling, so as to define a first flow channel 31 and a second flow channel 32 in the side wall 11.
  • the first flow channel 31 is located above the second flow channel 32, and the first flow channel 31 and the second flow channel 32 are separated by a clamping wall 33.
  • a through connection port is provided on the clamping wall 33, so that the first flow channel 31 and the second flow channel 32 are connected through the connection port.
  • the first installation plate 41 When the first installation plate 41 is connected to the side wall 11, the first installation plate 41 blocks the second flow channel 32, and the first opening 411 on the first installation plate 41 is in communication with the first flow channel 31.
  • the coolant can flow from the first flow channel 31 to the accommodating chamber 10 through the first opening 411 , and the coolant can flow from the second flow channel 32 to the first flow channel 31 through the first connecting port 341 .
  • Impurities contained in the coolant are filtered by the first filter 51 , and the impurities contained in the coolant are blocked and accumulated in the second flow channel 32 .
  • a partition 412 is connected to the first mounting plate 41, the lower end of the partition 412 is connected to the side of the first filter 51 away from the second opening 421, and the upper end of the partition 412 is connected to the top wall of the first flow channel 31.
  • the partition 412 is provided to block the first flow channel 31 to prevent the liquid from flowing along the first flow channel 31 in a direction away from the second opening 421.
  • the partition 412 may improve the flow stability of the coolant, ensure the unidirectional flow of the coolant, reduce the turbulence of the liquid, and improve the heat exchange efficiency.
  • the second opening 421 is located below the second filter screen 52, and part of the edge of the second opening 421 is consistent with the shape of the second filter screen 52. Since the second filter screen 52 includes a horizontal screen 521 and an inclined screen 522, and the inclined screen 522 is arranged in the first flow channel 31, the coolant will also be filtered by the second filter screen 52 when it flows through the inclined screen 522 in the first flow channel 31. Therefore, the second opening 421 can be connected not only to the second flow channel 32, but also to the first flow channel 31. The second opening 421 is located on the side of the second filter screen 52 away from the first opening 411.
  • the angle between the horizontal net 521 and the inclined net 522 is 90°-170°, so that the impurities automatically settle after contacting the inclined net 522 .
  • the coolant flowing from the micropores 12 to the accommodating chamber 10 is pure coolant without impurities. After multiple cycles, the impurities contained in the coolant gradually accumulate in the first flow channel 31 and/or the second flow channel 32, thereby effectively reducing the impurity content of the coolant in the accommodating chamber 10, reducing the risk of impurities contacting the battery cell 2, and improving the safety of the battery pack 100.
  • a barrier film is provided on the surface of the micropore 12, which allows the coolant to flow and blocks impurities.
  • the barrier film can further enhance the filtering effect, retain impurities in the first flow channel 31 and/or the second flow channel 32, reduce the impurity content of the coolant in the accommodating cavity 10, and further improve the safety of the battery pack 100.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)

Abstract

本申请公开了一种电池包，电池包包括：壳体、电芯和冷却液，壳体限定出容纳腔，壳体具有侧壁，电芯置于容纳腔内，冷却液盛装在容纳腔内，电芯至少部分浸没在冷却液内。其中，侧壁内部限定出第一流道和第二流道，第一流道和第二流道之间通过连接口连通，在连接口处设置有滤网，滤网可供冷却液流动且阻隔杂质；侧壁上开设有第一开口和第二开口，第一开口与第一流道连通，第二开口与第二流道连通，冷却液可从第二流道流向第一流道。通过在侧壁内部限定出第一流道和第二流道，第一流道和第二流道之间的连接口处设置有滤网，滤网可供冷却液流动且阻隔杂质。可降低容纳腔内冷却液的杂质含量，减小杂质接触到电芯的风险，提升电池包的使用安全性。

Description

电池包
相关申请的交叉引用
本申请基于申请号为202223599518.0(申请日为2022-12-30)的中国专利申请提出，并要求上述中国专利申请的优先权，上述中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及电池技术领域，尤其涉及一种电池包。
背景技术
现有电池包采用将电芯浸泡在浸没液中实现散热，并且浸没液与电芯直接接触还可起到一定的绝缘作用。但是浸没液中混杂了金属颗粒时会导致电池包的绝缘失效，使得电池包具有短路风险。
申请内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请的一个目的在于提出一种电池包，该电池包内的冷却液过滤，避免冷却液中的杂质与电芯接触，降低短路风险，提升电池包的安全性。
根据本申请实施例的电池包，包括：壳体，所述壳体限定出容纳腔，所述壳体具有侧壁；电芯，所述电芯置于所述容纳腔内；冷却液，所述冷却液盛装在所述容纳腔内，所述电芯至少部分浸没在所述冷却液内；其中，所述侧壁内部限定出第一流道和第二流道，所述第一流道和所述第二流道之间通过连接口连通，在所述连接口处设置有滤网，所述滤网可供所述冷却液流动且阻隔杂质；所述侧壁上开设有第一开口和第二开口，所述第一开口与所述第一流道连通，所述第二开口与所述第二流道连通，所述冷却液可从所述第二流道流向所述第一流道。
根据本申请实施例的电池包，通过在侧壁内部限定出第一流道和第二流道，第一流道和第二流道之间的连接口处设置有滤网，滤网可供冷却液流动且阻隔杂质。当冷却液从第二流道流向第一流道时，冷却液包含的杂质被阻拦积攒在第二流道内，从第一流道流向容纳腔的冷却液则是不含杂质的纯净冷却液，在经过多次循环流动后，冷却液包含 的杂质逐渐积攒到第二流道内，从而可有效降低容纳腔内冷却液的杂质含量，减小杂质接触到电芯的风险，提升电池包的使用安全性。
在一些实施例中，所述侧壁上开设有所述滤网能够穿过的安装口，所述安装口邻近所述连接口设置；所述侧壁还包括用于封闭所述安装口的安装板。
在一些实施例中，所述滤网固定连接在所述安装板上，所述安装板在所述侧壁上可拆卸。
在一些实施中，所述安装口的一部分正对所述第一流道且另一部分正对所述第二流道，所述连接口朝向所述安装口敞开，所述滤网经所述安装口插接在所述连接口处；所述第一开口和/或所述第二开口形成在所述安装板上。
在一些实施例中，所述连接口包括第一连接口，所述滤网包括位于所述第一连接口处的第一滤网；所述安装口包括所述第一滤网能够穿过的第一安装口，所述第一安装口邻近所述第一连接口设置；所述安装板包括封闭所述第一安装口的第一安装板，所述第一开口形成在所述第一安装板上。
具体地，所述第一滤网水平设置，所述第一流道的至少部分位于所述第一滤网上方，所述第二流道的至少部分位于所述第一滤网下方，所述第一开口位于所述第一滤网上方；所述第一安装板上连接有隔板，所述隔板的下端连接在所述第一滤网的远离所述第二开口的一侧，所述隔板的上端连接所述第一流道的顶壁。
在一些实施例中，所述连接口包括第二连接口，所述滤网包括位于所述第二连接口处的第二滤网；所述安装口包括所述第二滤网能够穿过的第二安装口，所述第二安装口邻近所述第二连接口设置；所述安装板包括封闭所述第二安装口的第二安装板，所述第二开口形成在所述第二安装板上。
具体地，所述第二滤网包括水平网和倾斜网，所述倾斜网的一端连接所述水平网，所述倾斜网的另一端位于所述水平网的上方；所述第一流道的至少部分位于所述水平网上方，所述第二流道的至少部分位于所述水平网下方，所述倾斜网的所述另一端连接所述第一流道的顶壁；所述第二开口位于所述第一滤网下方，所述第二开口的部分边缘与所述第一滤网形状一致。
在一些实施例中，所述侧壁上开设有多个微孔，所述微孔与所述第一流道、所述第二流道中至少一个连通。
具体地，所述微孔表面设有阻隔膜片，所述阻隔膜片可供冷却液流动且阻隔杂质。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得 明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍。
图1是根据本申请实施例的电池包的结构示意图；
图2是根据本申请实施例的电池包隐藏部分电芯后的结构示意图；
图3是根据图2所示示例隐藏安装板的结构示意图；
图4是根据本申请实施例的电池包的第一安装板的结构示意图；
图5是根据本申请实施例的电池包的第二安装板的结构示意图；
图6是根据图2所示示例的电池包的俯视图；
图7是根据图6所示示例的A-A截面图；
图8是根据图1所示示例的电池包的俯视图；
图9是根据图1所示示例的电池包的主视图；
图10是根据图9所示示例的B-B截面图；
图11是根据图10所示示例的C区域局部放大图；
图12是根据本申请一个具体实施例的电池包的结构示意图。
附图标记：
电池包100；
壳体1；容纳腔10；侧壁11；安装口110；第一安装口111；第二安装口112；微
孔12；
电芯2；
第一流道31；第二流道32；夹壁33；第一连接口341；第二连接口342；
安装板4；第一安装板41；第一开口411；隔板412；第二安装板42；第二开口421；
第一滤网51；第二滤网52；水平网521；倾斜网522。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终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。
下面参考图1-图12描述根据本申请实施例的电池包100。
根据本申请实施例的电池包100，包括：壳体1、电芯2和冷却液，壳体1限定出容纳腔10，壳体1具有侧壁11，电芯2置于容纳腔10内，冷却液盛装在容纳腔10内，电芯2至少部分浸没在冷却液内。壳体1起到支撑和保护作用，如图1所示，多个电芯2堆叠设置在壳体1形成的容纳腔10中，壳体1保护内部的电芯2。冷却液承装在容纳腔10内，电芯2至少部分浸没在冷却液中，冷却液直接与电芯2接触对电芯2进行散热，并且冷却液与电芯2直接接触还可起到一定绝缘作用，提升电池包100的安全性。
电池包100的壳体1包括多个侧壁11，在侧壁11内部限定出第一流道31和第二流道32，第一流道31和第二流道32通过连接口连接，冷却液可在第一流道31和第二流道32之间流动。同时在侧壁11上设置有第一开口411和第二开口421，其中第一开口411与第一流道31连通，第二开口421与第二流道32连通，冷却液即可在第一流道31、容纳腔10和第二流道32之间流动。
而在第一流道31和第二流道32之间的连接口处设置有滤网，滤网可供冷却液流动且阻隔杂质，因此当冷却液从第二流道32流向第一流道31时，冷却液包含的杂质，比如金属颗粒等就被滤网阻拦在第二流道32内，冷却液则可顺利流向第一流道31。
电池包100内的冷却液按第一流道31、容纳腔10、第二流道32、第一流道31的顺序依次流动，冷却液从第一流道31穿过第一开口411流向容纳腔10，冷却液在容纳腔10内与电芯2接触后，穿过第二开口421从容纳腔10流向第二流道32，接着冷却液经过连接口流向第一流道31。冷却液在从第二流道32流向第一流道31的过程中，冷却液包含的杂质就被滤网阻拦留在第二流道32内。从第一流道31流向容纳腔10的冷却液则是不含杂质的纯净冷却液，在经过多次循环流动后，冷却液包含的杂质逐渐积攒到第二流道32内，从而可有效降低容纳腔10内冷却液的杂质含量，减小杂质接触到电芯2的风险，提升电池包100的使用安全性。
根据本申请实施例的电池包100，通过在侧壁11内部限定出第一流道31和第二流道32，第一流道31和第二流道32之间的连接口处设置有滤网，滤网可供冷却液流动且阻隔杂质。当冷却液从第二流道32流向第一流道31时，冷却液包含的杂质被阻拦积攒在第二流道32内，从第一流道31流向容纳腔10的冷却液则是不含杂质的纯净冷却液，在经过多次循环流动后，冷却液包含的杂质逐渐积攒到第二流道32内，从而可有效降低容纳腔10内冷却液的杂质含量，减小杂质接触到电芯2的风险，提升电池包100 的使用安全性。
在本申请的一些实施例中，电池包100的壳体1包括四个侧壁11。可选地，可在其中一个侧壁11内部限定出第一流道31和第二流道32，冷却液仅在这个侧壁11的第一流道31、第二流道32和容纳腔10之间流动。还可为在多个侧壁11均限定出第一流道31和第二流道32，冷却液可在多个不同的第一流道31、不同的第二流道32和容纳腔10之间流动，这也落入到本申请的保护范围内。而由于第一流道31和第二流道32之间均设置有滤网，因此从不同的第一流道31流向容纳腔10的冷却液均为不含杂质的纯净冷却液，冷却液包含的杂质就积攒到多个第二流道32内，从而可有效降低容纳腔10内冷却液的杂质含量。
在本申请的一些具体实施例中，如图10所示，在两个相对的第一侧壁11和第二侧壁11内均限定出第一流道31和第二流道32，相对应的第一流道31和第二流道32之间的连接口均设置有滤网，冷却液可在不同的第一流道31、不同的第二流道32和容纳腔10之间流动。从第一侧壁11内的第一流道31和第二侧壁11内的第一流道31流向容纳腔10的冷却液为不含杂质的纯净冷却液。冷却液包含的杂质就分别随着流动积攒到第一侧壁11内的第二流道32和第二侧壁11内的第二流道32内，可有效降低容纳腔10内冷却液的杂质含量。
在本申请的一些具体实施例中，电池包100还包括泵组件，泵组件驱动冷却液从第二流道32流向第一流道31，并且使电池包100内的冷却液沿第一流道31、容纳腔10、第二流道32、第一流道31的顺序依次流动，避免冷却液倒流，提升电池包100的工作稳定性。
在本申请的一些具体实施例中，如图7和图10所示，第一流道31位于第二流道32的上方，冷却液沿第二开口421流向第二流道32后，杂质在重力的作用下更容易沉积在第二流道32内。
本申请的电池包100在第一流道31和第二流道32之间的连接口处设置有滤网，即可在冷却液从第二流道32流向第一流道31时，对冷却液起到过滤净化的作用，这个连接口的设置位置和数量可根据实际需要进行选择。
在本申请的一些实施例中，如图3所示，侧壁11上开设有滤网能够穿过的安装口110，安装口110邻近连接口设置。可以理解的是，电池包100的壳体1对内部电芯2起到保护作用，在侧壁11内部的第一流道31和第二流道32之间加工出连接口，并且在连接口处设置滤网的加工方式较为困难，降低生产制造效率。因此在一些实施例中， 如图2和图3所示，在侧壁11上开设安装口110，安装口110与第一流道31和/或第二流道32连通，随后在开设的安装口110处设置、加工连接口，并且酱油安装口110处将滤网安装在连接口处，则可提升本申请电池包100的加工效率。
在本申请的一些实施例中，在侧壁11上开设安装口110，在侧壁11上还设置有封闭安装口110的安装板4，在侧壁11上设置安装口110以便于连接口的开设和滤网的安装，而安装口110与第一流道31和/或第二流道32连通，在连接口开设完毕后和滤网安装完成后，可通过设置安装板4将安装口110封闭，避免冷却液混流。
安装口110可与第一流道31连通，安装口110还可与第二流道32连通，安装口110还可同时与第一流道31和第二流道32连通，安装口110的设置就是为了开设连接口和安装滤网，安装口110的具体布置位置和数量可根据实际需要进行选择。
在本申请的一些实施例中，在侧壁11上开设安装口110，在侧壁11上还设置有封闭安装口110的安装板4，而滤网需要设置在连接口处，连接口临近安装口110设置，因此可直接将滤网固定连接在安装板4上，将滤网的安装和安装板4的安装动作合并为一个动作，将安装板4安装在安装口110上时直接就将滤网安装到位，进一步提升本申请电池包100的加工效率。
在本申请的一些实施例中，安装板4在侧壁11上可拆卸，安装板4与侧壁11可拆卸连接，便于对滤网的拆卸和更换，提升使用寿命。
安装板4可与侧壁11通过螺接、胶接或者粘接装配，在此不做具体限制。
在本申请的一些具体实施例中，侧壁11通过挤压型材或辊压构造为多腔体结构，以在侧壁11内限定出第一流道31和第二流道32。如图2和图6所示，第一流道31位于第二流道32的上方，第一流道31和第二流道32通过夹壁33间隔开。在夹壁33上开设有贯通的连接口，以使第一流道31和第二流道32通过连接口连通。
在本申请的一些具体实施例中，安装口110同时与第一流道31和第二流道32连通，安装口110的一部分正对第一流道31且另一部分正对第二流道32。连接口朝向安装口110敞开，滤网经安装口110插接在连接口处，在将安装板4安装在侧壁11上时，滤网可直接插接到连接口上，提升加工装配效率。
可以理解的是，在侧壁11上需要开设有第一开口411和第二开口421以将第一流道31和第二流道32分别与容纳腔10连通。而通过在侧壁11上开设安装口110，安装口110就直接将第一流道31和/或第二流道32与容纳腔10连通，因此可省略在侧壁11上重新开孔的步骤。在安装板4上设置第一开口411和/或第二开口421，即可将第一流 道31和/或第二流道32与容纳腔10连通。比如，第一开口411形成在安装板4上，安装口110与第一流道31连通，安装板4连接在侧壁11上，第一开口411即与安装口110连通，第一开口411即可实现将第一流道31与容纳腔10连通。又比如，第一开口411形成在安装板4上，安装口110与第一流道31和第二流道32均连通，安装板4连接在侧壁11上时，安装板4将第二流道32封堵，第一开口411即通过安装口110与第一流道31连通，第一开口411即可实现将第一流道31与容纳腔10连通。
在本申请的一些实施例中，如图2所示，连接口包括第一连接口341，滤网包括位于第一连接口341处的第一滤网51。安装口110包括第一滤网51能够穿过的第一安装口111，第一安装口111邻近第一连接口341设置在侧壁11上，第一安装口111的一部分与第一流道31正对，且第一安装口111的另一部分与第二流道32正对。安装板4包括封闭第一安装口111的第一安装板41，第一开口411形成在第一安装板41上，第一安装板41连接在侧壁11上时，第一安装板41将第二流道32封堵，且第一安装板41上的第一开口411与第一流道31连通。冷却液可经过第一开口411从第一流道31流向容纳腔10，且冷却液可从第二流道32经过第一连接口341流向第一流道31，冷却液包含的杂质被第一滤网51过滤，冷却液包含的杂质被阻拦积攒在第二流道32内。
在本申请的一些具体实施例中，如图2和图4所示，第一滤网51水平设置，第一流道31的至少部分位于第一滤网51上方，第二流道32的至少部分位于第一滤网51下方，第一开口411位于第一滤网51上方。
第一滤网51水平设置，第一流道31位于第一滤网51的上方，第二流道32位于第二流道32的下方，第一滤网51与夹壁33正对设置。通过设置第一滤网51，从第二流道32经过第一连接口341流向第一流道31的冷却液包含的杂质被第一滤网51过滤，冷却液包含的杂质被阻拦积攒在第二流道32内。
在本申请的一些具体实施例中，如图5所示，第一安装板41上连接有隔板412，隔板412的下端连接在第一滤网51的远离第二开口421的一侧，隔板412的上端连接第一流道31的顶壁。
通过设置隔板412将第一流道31封堵，避免液体沿第一流道31朝向远离第二开口421发方向流动。设置隔板412可能提升冷却液的流动稳定性，保证冷却液单向流动，降低液体紊流，提升换热效率。
在本申请的一些实施例中，如图2所示，连接口包括第二连接口342，滤网包括位于第二连接口342处的第二滤网52。安装口110包括第二滤网52能够穿过的第二安装 口112，第二安装口112邻近第二连接口342设置在侧壁11上，第二安装口112的一部分与第一流道31正对，且第二安装口112的另一部分与第二流道32正对。安装板4包括封闭第二安装口112的第二安装板42，第二开口421形成在第二安装板42上，第二安装板42连接在侧壁11上时，第二安装板42将第一流道31封堵，且第二安装板42上的第二开口421与第二流道32连通。冷却液可经过第二开口421从容纳腔10流向第二流道32，且冷却液可从第二流道32经过第二连接口342流向第一流道31，冷却液包含的杂质被第二滤网52过滤，冷却液包含的杂质被阻拦积攒在第二流道32内。
在本申请的一些具体实施例中，如图2和图5所示，第二滤网52包括水平网521和倾斜网522，倾斜网522的一端连接水平网521，倾斜网522的另一端位于水平网521的上方。第一流道31的至少部分位于水平网521上方，第二流道32的至少部分位于水平网521下方，水平网521与夹壁33正对设置，倾斜网522的另一端连接第一流道31的顶壁。通过将第二滤网52设置水平网521和倾斜网522，相比于仅设置与夹壁33正对的水平网521，第二滤网52的过滤面积更大，提升过滤效果，提升冷却液流动稳定性。
如图5所示，第二开口421位于第二滤网52下方，第二开口421的部分边缘与第二滤网52形状一致。由于第二滤网52包括水平网521和倾斜网522，而倾斜网522设置在第一流道31内，冷却液在第一流道31内流动经过倾斜网522时也会被第二滤网52过滤。因此第二开口421可不仅与第二流道32连通，第二开口421还可与第一流道31连通，第二开口421位于第二滤网52远离第一开口411的一侧，即使冷却液经过第二开口421流向第一流道31，冷却液朝向第一开口411的流动过程中还是会被倾斜网522过滤。因此如图5所示，第二开口421还可与第一流道31连通去，且第二开口421的边缘形状与第二滤网52形状一致，提升第二开口421的开设面积，冷却液流量较大，提升冷却液的过滤效果。
在本申请的一些实施例中，如图5所示，在左右方向上，水平网521和倾斜网522的之间的夹角为钝角，倾斜网522的面积增大，提升第二滤网52的过滤效果。
优选地，水平网521和倾斜网522之间的夹角为90°-170°，以便杂质接触到倾斜网522后自动沉降。
在本申请的一些具体实施例中，如图12所示，侧壁11上开设有多个微孔12，微孔12与第一流道31、第二流道32中至少一个连通。冷却液经由第一开口411和/或第二开口421流向第一流道31和/或第二流道32，随后冷却液经过微孔12流向容纳腔10。 微孔12的孔径较小，冷却液流过微孔12进入容纳腔10时，冷却液包含的杂质就被微孔12阻拦留在第一流道31和/或第二流道32内。从微孔12流向容纳腔10的冷却液则是不含杂质的纯净冷却液，在经过多次循环流动后，冷却液包含的杂质逐渐积攒到第一流道31和/或第二流道32内，从而可有效降低容纳腔10内冷却液的杂质含量，减小杂质接触到电芯2的风险，提升电池包100的使用安全性。
进一步地，微孔12表面设有阻隔膜片，阻隔膜片可供冷却液流动且阻隔杂质。通过设置阻隔膜片可进一步过滤效果，将杂质留存在第一流道31和/或第二流道32内，降低容纳腔10内冷却液的杂质含量，进一步提升电池包100的使用安全性。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”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、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。
在本申请的描述中，“第一特征”、“第二特征”可以包括一个或者更多个该特征。
在本申请的描述中，“多个”的含义是两个或两个以上。
在本申请的描述中，第一特征在第二特征“之上”或“之下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。
在本申请的描述中，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。
根据本申请实施例的电池包的其他构成例如电芯和冷却液等以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型， 本申请的范围由权利要求及其等同物限定。

Claims (10)

  1. 一种电池包，其特征在于，包括：
    壳体，所述壳体限定出容纳腔，所述壳体具有侧壁；
    电芯，所述电芯置于所述容纳腔内；
    冷却液，所述冷却液盛装在所述容纳腔内，所述电芯至少部分浸没在所述冷却液内；
    其中，所述侧壁内部限定出第一流道和第二流道，所述第一流道和所述第二流道之间通过连接口连通，在所述连接口处设置有滤网，所述滤网可供所述冷却液流动且阻隔杂质；
    所述侧壁上开设有第一开口和第二开口，所述第一开口与所述第一流道连通，所述第二开口与所述第二流道连通，所述冷却液可从所述第二流道流向所述第一流道。
  2. 根据权利要求1所述的电池包，其特征在于，所述侧壁上开设有所述滤网能够穿过的安装口，所述安装口邻近所述连接口设置；所述侧壁还包括用于封闭所述安装口的安装板。
  3. 根据权利要求2所述的电池包，其特征在于，所述滤网固定连接在所述安装板上，所述安装板在所述侧壁上可拆卸。
  4. 根据权利要求2所述的电池包，其特征在于，所述安装口的一部分正对所述第一流道且另一部分正对所述第二流道，所述连接口朝向所述安装口敞开，所述滤网经所述安装口插接在所述连接口处；
    所述第一开口和/或所述第二开口形成在所述安装板上。
  5. 根据权利要求4所述的电池包，其特征在于，所述连接口包括第一连接口，所述滤网包括位于所述第一连接口处的第一滤网；
    所述安装口包括所述第一滤网能够穿过的第一安装口所述第一安装口邻近所述第一连接口设置；
    所述安装板包括封闭所述第一安装口的第一安装板，所述第一开口形成在所述第一安装板上。
  6. 根据权利要求5所述的电池包，其特征在于，所述第一滤网水平设置，所述第一流道的至少部分位于所述第一滤网上方，所述第二流道的至少部分位于所述第一滤网下方，所述第一开口位于所述第一滤网上方；
    所述第一安装板上连接有隔板，所述隔板的下端连接在所述第一滤网的远离所述第二开口的一侧，所述隔板的上端连接所述第一流道的顶壁。
  7. 根据权利要求4所述的电池包，其特征在于，所述连接口包括第二连接口，所述滤网包括位于所述第二连接口处的第二滤网；
    所述安装口包括所述第二滤网能够穿过的第二安装口，所述第二安装口邻近所述第二连接口设置；
    所述安装板包括封闭所述第二安装口的第二安装板，所述第二开口形成在所述第二安装板上。
  8. 根据权利要求7所述的电池包，其特征在于，所述第二滤网包括水平网和倾斜网，所述倾斜网的一端连接所述水平网，所述倾斜网的另一端位于所述水平网的上方；
    所述第一流道的至少部分位于所述水平网上方，所述第二流道的至少部分位于所述水平网下方，所述倾斜网的所述另一端连接所述第一流道的顶壁；
    所述第二开口位于所述第二滤网下方，所述第二开口的部分边缘与所述第二滤网形状一致。
  9. 根据权利要求1-8中任一项所述的电池包，其特征在于，所述侧壁上开设有多个微孔，所述微孔与所述第一流道、所述第二流道中至少一个连通。
  10. 根据权利要求9所述的电池包，其特征在于，所述微孔表面设有阻隔膜片，所述阻隔膜片可供冷却液流动且阻隔杂质。
PCT/CN2023/143564 2022-12-30 2023-12-29 电池包 Ceased WO2024141083A1 (zh)

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