WO2023124505A1 - 电池模块及电池模组 - Google Patents

电池模块及电池模组 Download PDF

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Publication number
WO2023124505A1
WO2023124505A1 PCT/CN2022/128982 CN2022128982W WO2023124505A1 WO 2023124505 A1 WO2023124505 A1 WO 2023124505A1 CN 2022128982 W CN2022128982 W CN 2022128982W WO 2023124505 A1 WO2023124505 A1 WO 2023124505A1
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WO
WIPO (PCT)
Prior art keywords
heat
fireproof
battery module
cylindrical cells
fire
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Application number
PCT/CN2022/128982
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English (en)
French (fr)
Inventor
刘攀
刘华俊
张腾飞
Original Assignee
湖北亿纬动力有限公司
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Application filed by 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Publication of WO2023124505A1 publication Critical patent/WO2023124505A1/zh

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • 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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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 power batteries, for example, to a battery module and a battery module group.
  • cylindrical batteries There are multiple cylindrical cells in the battery module. When one of the cylindrical cells catches fire due to various reasons such as a short circuit, it may cause other cylindrical cells to catch fire, or even cause the entire battery module to be scrapped.
  • cylindrical batteries mainly use potting glue or flame-retardant foaming glue to achieve fireproofing and heat insulation. Time can block the fire, so that the fire will not spread in a short time, buy time for the rescue, so as to meet the fire protection level requirements.
  • the high density of the potting glue reduces the energy density of the entire battery module, thereby reducing the energy density of the battery module, and the fire and heat insulation effect of the potting glue is limited; a large amount of styrofoam will also easily reduce the energy density of the entire battery module. drop, and the foaming process is likely to cause problems such as poor verticality of the cell, which reduces the structural reliability.
  • the embodiments of the present application provide a battery module and a battery module group, which can increase the energy density of the battery module, improve the fire prevention and heat insulation effect, and improve the structural reliability.
  • the embodiment of the present application provides a battery module, including:
  • Multiple groups of cylindrical cells multiple groups of cylindrical cells are arranged in parallel and at intervals;
  • a plurality of fireproof and heat insulation strips the material of the fireproof and heat insulation strips is a fireproof and heat insulating material, a plurality of the fireproof and heat insulation strips are arranged in parallel, and the fireproof and heat insulation strips are arranged between two adjacent groups of the cylindrical cells between;
  • the fireproof heat shield is made of a fireproof and heat insulating material, and the fireproof heat shield is arranged on the outside of multiple groups of the cylindrical cells.
  • each group of cylindrical cells includes more than two rows of cylindrical cells, and the battery module further includes a serpentine tube disposed between two adjacent rows of cylindrical cells.
  • each group of cylindrical cells includes two rows of cylindrical cells, and when multiple groups of cylindrical cells are provided, the fireproof and heat-insulating strips and the serpentine tubes are arranged alternately.
  • it further includes a thermally conductive adhesive layer, and the thermally conductive adhesive layer is respectively arranged between the cylindrical cell and the serpentine tube and between the fireproof and heat insulating strip and the cylindrical cell.
  • the length of the fire-proof and heat-insulating strip is equal to the pipe length of the serpentine pipe.
  • the two sides of the multiple serpentine tubes are respectively connected by a first connecting tube and a second connecting tube, the first connecting tube is set for liquid inlet, and the second connecting tube
  • the two connecting pipes are arranged to discharge liquid, and a pipe hole is opened on the fireproof heat shield, and the connecting pipe is passed through the pipe hole.
  • the serpentine pipe is provided with a connecting head, and the connecting head is connected to the connecting pipe through a clamp.
  • both the fireproof and heat insulation strip and the fireproof and heat shield include a heat insulation layer and a fireproof layer for wrapping the heat insulation layer.
  • the fireproof layer is a fireproof layer made of mica
  • the heat insulation layer is a heat insulation layer made of asbestos
  • the embodiment of the present application further provides a battery module, including the above-mentioned battery module.
  • the fire-proof and heat-insulating strips are arranged between the gaps between two adjacent groups of cylindrical cells. Heat transfer between groups of cylindrical cells; by using fireproof heat insulation strips, potting glue or styrofoam can be replaced, and the energy density of the entire battery module is improved due to the small structure of fireproof heat insulation strips; fireproof heat insulation cover Set outside multiple groups of cylindrical cells, it can be used to block heat and flame transfer between different battery modules in the same battery module; by using a fireproof heat shield, it can replace the shell of the battery module and prevent external liquid cooling tubes The condensed water droplets short-circuit on the cylindrical battery cell, which improves the safety.
  • Fig. 1 is a schematic structural diagram of a battery module provided by a specific embodiment of the present application.
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components.
  • connection can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components.
  • a first feature being “on” or “under” a second feature may include the first feature being in direct contact with the second feature, and may also include the first feature and the second feature. Two features are not in direct contact but through another feature between them. Moreover, “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally 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.
  • the battery module includes a battery module; in order to improve the fireproof and heat insulation effect of the battery module and increase the energy density of the battery module, this embodiment also provides a battery module.
  • the battery module includes multiple groups of cylindrical cells 1, multiple fire-proof and heat-insulating strips 2, and fire-proof and heat-insulating covers 3; for example, multiple groups of cylindrical cells 1 are arranged in parallel at intervals;
  • the material of the heat strip 2 is a fireproof and heat-insulating material.
  • a plurality of fireproof and heat-insulating strips 2 are arranged in parallel, and the fire-proof and heat-insulating strips 2 are arranged between two adjacent groups of cylindrical cells 1;
  • the fireproof and heat shield 3 covers are arranged outside the multiple groups of cylindrical cells 1 .
  • the fire-proof and heat-insulating strip 2 is arranged between the gaps between two adjacent groups of cylindrical cells 1, and when the cylindrical cells 1 experience a small-scale thermal runaway, it can well block the heat transfer between the adjacent two groups of cylindrical cells 1;
  • the use of fire-proof and heat-insulating strips 2 can replace potting glue or styrofoam.
  • fire-proof and heat-insulating strips 2 Due to the small structure of fire-proof and heat-insulating strips 2, the energy density of the entire battery module is improved; fire-proof and heat-insulating covers 3 are arranged on multiple sets of cylindrical cells 1 Externally, the fireproof heat shield 3 can block the heat transfer and flame transfer between different battery modules arranged in the same battery module; by using the fireproof heat shield 3, it can replace the shell of the battery module, preventing the external liquid cooling tube The condensed water droplets on the surface short-circuit on the cylindrical battery cell 1, which improves the safety.
  • both the fireproof and heat insulation strip 2 and the fireproof and heat shield 3 include a heat insulation layer and a fireproof layer for wrapping the heat insulation layer, and the heat insulation and fireproof functions are respectively realized through the heat insulation layer and the fireproof layer.
  • the fireproof layer is a fireproof layer made of mica. Mica has a good fireproof effect, and the mica material is relatively soft.
  • the extrusion of the fireproof heat insulation strip 2 can adapt to the shape of the cylindrical cell 1 and fit between the two rows of cylindrical cells 1, ensuring the verticality of the cylindrical cell 1 and improving the structural reliability; in addition, the mica has Insulation performance, more reliable and safe to use.
  • the heat insulation layer is made of asbestos, and asbestos has a good heat insulation effect.
  • each group of cylindrical cells 1 includes more than two rows of cylindrical cells 1.
  • each group of cylindrical cells 1 includes two rows of cylindrical cells 1 as an example.
  • the battery module also includes a serpentine tube 4 arranged between two adjacent rows of cylindrical cells 1 , and the serpentine tube 4 is arranged to cool the cylindrical cells 1 .
  • each group of cylindrical cells 1 includes two rows of cylindrical cells 1, reducing the number of cylindrical cells 1 in each group of cylindrical cells 1, reducing the probability of fire; and making every two rows of cylindrical cells 1 share a serpentine
  • the tube 4 reduces the number of serpentine tubes 4 used.
  • the fire-proof and heat-insulating strips 2 and the serpentine tubes 4 are arranged alternately.
  • a row of cylindrical cells 1 can be installed first, and then a serpentine tube 4 can be installed. A row of cylindrical cells 1, and finally a fire-proof and heat-insulating strip 2 is installed, and the installation of a battery module is completed in this cycle.
  • the fireproof heat shield 3 itself has fireproof and heat insulation properties, for example, as shown in Figure 1, the first group of cylindrical cells 1 and the last group of cylindrical cells 1 are respectively arranged on the frame and fireproof Between the heat insulation strips 2, the frame of the fireproof heat shield 3 plays the role of the fireproof heat insulation strip 2, and there is no need to set the fireproof heat insulation strip 2 again at the frame of the fireproof heat shield 3, which saves space.
  • the battery module further includes a heat-conducting adhesive layer, which is respectively arranged between the cylindrical battery cell 1 and the serpentine tube 4 and between the fireproof and heat-insulating strip 2 and the cylindrical battery cell 1, so as to improve the performance of the cylindrical battery cell 1 respectively.
  • a heat-conducting adhesive layer which is respectively arranged between the cylindrical battery cell 1 and the serpentine tube 4 and between the fireproof and heat-insulating strip 2 and the cylindrical battery cell 1, so as to improve the performance of the cylindrical battery cell 1 respectively.
  • the length of the fire-proof and heat-insulating strip 2 is equal to the pipe length of the serpentine pipe 4. Since the serpentine pipe 4 is in a curved state, the length of the fire-proof and heat-insulating strip 2 is greater than the length of the serpentine pipe 4 along the straight line, so that the fireproof The heat insulation strip 2 fully separates two adjacent rows of cylindrical battery cells 1 to prevent fire and heat insulation, thereby improving reliability and safety.
  • the length of the serpentine tube 4 is not less than the length of the entire row of cylindrical cells 1, so that each cylindrical cell 1 is fully cooled and the temperature uniformity of multiple cylindrical cells 1 is improved.
  • the two ends of the fireproof heat insulation strip 2 extend to the frame around the fireproof heat shield 3, which is fully insulated without increasing the volume.
  • the width of the fire-proof and heat-insulating strip 2 is not greater than the height of the cylindrical cell 1 to avoid increasing the size of the battery module along the height direction of the cylindrical cell 1; width for adequate fire insulation.
  • the two sides of the plurality of serpentine tubes 4 are respectively connected by a first connecting pipe and a second connecting pipe, the first connecting pipe is set for liquid inlet, and the second connecting pipe is set for In order to discharge the liquid, the coolant in the serpentine tube 4 can be liquid circulated to realize cooling, avoiding the communication between multiple serpentine tubes 4 and the outside to realize liquid circulation, which simplifies the structure; in addition, the connecting pipe connects multiple serpentine tubes
  • the tube 4 makes the structure between the plurality of serpentine tubes 4 relatively stable, improving the structural stability and reliability.
  • the first connecting pipe may communicate with an external cooling liquid outlet device
  • the second connecting pipe may communicate with an external cooling liquid recovery device.
  • a pipe hole 31 is opened on the fireproof heat shield 3 , and the connecting pipe is passed through the pipe hole 31 ;
  • a connecting head is provided on the serpentine pipe 4, and the connecting head and the connecting pipe are connected by a clamp to improve connection reliability.
  • the fire-proof and heat-insulating strips are arranged between the gaps between two adjacent groups of cylindrical cells.
  • the cylindrical cells experience thermal runaway in a small range, they can well block the Heat transfer between batteries; by using fireproof and heat-insulating strips, it can replace potting glue or styrofoam.
  • the energy density of the entire battery module is improved; the fireproof and heat-insulating cover is located on The exterior of multiple groups of cylindrical cells can be used for heat insulation and flame transfer between different battery modules in the same battery module; by using a fireproof heat shield, it can replace the shell of the battery module and prevent external liquid cooling tubes The condensed water droplets short-circuit on the cylindrical battery cell, which improves the safety.

Abstract

本申请公开了一种电池模块及电池模组，电池模块包括多组圆柱电芯、多个防火隔热条和防火隔热罩，多组圆柱电芯平行间隔设置；防火隔热条的材质为防火且隔热的材质，多个防火隔热条平行设置，防火隔热条设置于相邻两组圆柱电芯之间；防火隔热罩的材质为防火且隔热的材质，防火隔热罩罩设于多组圆柱电芯外部。

Description

电池模块及电池模组
本申请要求在2021年12月29日提交中国专利局、申请号为202123376874.1的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及动力电池领域，例如涉及一种电池模块及电池模组。
背景技术
电池模块内具有多个圆柱电芯，当其中一个圆柱电芯由于短路等各种原因起火时，或引发其他圆柱电芯起火，甚至会导致整个电池模块报废。相关技术中，圆柱电芯主要使用灌封胶或者阻燃发泡胶等形式实现防火隔热，阻燃发泡胶是在发泡胶的性能上增添了阻燃的效果，这样在发生火灾的时候可以起到隔阻火情，使火情不会在短时间内扩散，给救援争取时间，从而来达到防火等级要求。灌封胶密度较大，降低了整个电池模块的能量密度，进而降低了电池模组的能量密度，且灌封胶的防火隔热效果有限；大量使用发泡胶也容易导致整个电池模块能量密度下降，且发泡过程容易导致电芯垂直度不良等问题，降低了结构可靠性。
发明内容
本申请实施例提供一种电池模块及电池模组，提高电池模块的能量密度，提高防火隔热效果，提高结构可靠性。
第一方面，本申请实施例提供一种电池模块，包括：
多组圆柱电芯，多组所述圆柱电芯平行间隔设置；
多个防火隔热条，防火隔热条的材质为防火且隔热的材质，多个所述防火隔热条平行设置，所述防火隔热条设置于相邻两组所述圆柱电芯之间；
防火隔热罩，防火隔热罩的材质为防火且隔热的材质，所述防火隔热罩罩设于多组所述圆柱电芯外部。
在一实施例中，每组所述圆柱电芯包括两排以上所述圆柱电芯，所述电池模块还包括设置于相邻两排所述圆柱电芯之间的蛇形管。
在一实施例中，每组所述圆柱电芯包括两排所述圆柱电芯，设置有多组所述圆柱电芯时，所述防火隔热条和所述蛇形管交替设置。
在一实施例中，还包括导热胶层，所述导热胶层分别设置于所述圆柱电芯和所述蛇形管之间以及所述防火隔热条和所述圆柱电芯之间。
在一实施例中，所述防火隔热条的长度与所述蛇形管的管道长度相等。
在一实施例中，设置有多个所述蛇形管时，多个所述蛇形管的两侧分别通过第一连接管和第二连接管连接，第一连接管设置为进液，第二连接管设置为出液，所述防火隔热罩上开设有管孔，所述连接管穿设于所述管孔。
在一实施例中，所述蛇形管上设有连接头，所述连接头与所述连接管通过卡箍连接。
在一实施例中，所述防火隔热条和所述防火隔热罩均包括隔热层和用于包裹所述隔热层的防火层。
在一实施例中，所述防火层为云母材质的防火层，所述隔热层为石棉材质的隔热层。
第二方面，本申请实施例还提供一种电池模组，包括上述的电池模块。
本申请实施例的有益效果：
本申请实施例提供的一种电池模块及电池模组，防火隔热条设置于相邻两组圆柱电芯的间隙之间，圆柱电芯出现小范围热失控时，可以很好阻隔相邻两组圆柱电芯之间的传热；通过使用防火隔热条，能够替代灌封胶或者发泡胶，由于防火隔热条结构较小，提高了整个电池模块的能量密度；防火隔热罩罩设于多组圆柱电芯外部，能够用于同一电池模组内的不同电池模块之间的阻隔热量和火焰传递；通过使用防火隔热罩，能够替代电池模块的外壳，防止了外部液冷管上凝水滴在圆柱电芯上发生短路，提高了安全性。
附图说明
图1是本申请的具体实施方式提供的电池模块的结构示意图。
图中：
1、圆柱电芯；2、防火隔热条；3、防火隔热罩；31、管孔；4、蛇形管。
具体实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；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或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据情况理解上述术语在本申请中的含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一特征和第二特征直接接触，也可以包括第一特征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。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。
本实施例提供了一种电池模组，所述电池模组包括电池模块；为提高电池模组的防火隔热效果以及提高电池模块的能量密度，本实施例还提供了一种电池模块。示例性地，如图1所示，电池模块包括多组圆柱电芯1、多个防火隔热条2和防火隔热罩3；示例性地，多组圆柱电芯1平行间隔设置；防火隔热条2的材质为防火且隔热的材质，多个防火隔热条2平行设置，防火隔热条2设置于相邻两组圆柱电芯1之间；防火隔热罩3为防火隔热的材质，防火隔热罩3罩设于多组圆柱电芯1外部。
防火隔热条2设置于相邻两组圆柱电芯1的间隙之间，圆柱电芯1出现小范围热失控时，可以很好阻隔相邻两组圆柱电芯1之间的传热；通过使用防火隔热条2，能够替代灌封胶或者发泡胶，由于防火隔热条2结构较小，提高了整个电池模块的能量密度；防火隔热罩3罩设于多组圆柱电芯1外部，防火隔热罩3能够阻隔设置于同一电池模组内的不同电池模块之间的热量传递和火焰传递；通过使用防火隔热罩3，能够替代电池模块的外壳，防止了外部液冷管上的凝水滴在圆柱电芯1上发生短路，提高了安全性。
示例性地，防火隔热条2和防火隔热罩3均包括隔热层和用于包裹隔热层的防火层，分别通过隔热层和防火层实现隔热和防火功能。示例性地，防火层为云母材质的防火层，云母的防火效果好，且云母材质比较柔软，当防火隔热条2设置于相邻两组圆柱电芯1之间时，受到圆柱电芯1的挤压，使防火隔热条2能够自适应于圆柱电芯1的外形并贴合在两排圆柱电芯1之间，保证圆柱电芯1垂直度，提高了结构可靠性；另外云母具有绝缘性能，使用更可靠和安全。
示例性地，隔热层为石棉材质的隔热层，石棉具有良好的隔热效果。
示例性地，每组圆柱电芯1包括两排以上圆柱电芯1，图1以每组圆柱电芯1包括两排圆柱电芯1为例，每排圆柱电芯1沿防火隔热条2的长度方向延伸，电池模块还包括设置于相邻两排圆柱电芯1之间的蛇形管4，蛇形管4设置为使得圆柱电芯1冷却。示例性地，每组圆柱电芯1包括两排圆柱电芯1，减少每组圆柱电芯1中圆柱电芯1的数量，降低起火概率；且使每两排圆柱电芯1共用一个蛇形管4，减少了蛇形管4的使用数量。示例性地，设置有多组圆柱电芯1时，防火隔热条2和蛇形管4交替设置，组装时可以先安装一排圆柱电芯1，然后安装一条蛇形管4，接着再安装一排圆柱电芯1，最后安装一条 防火隔热条2，如此循环完成一个电池模块的安装。
由于防火隔热罩3本身具有防火隔热性，示例性地，如图1所示，第一组圆柱电芯1和最后一组圆柱电芯1分别设置于防火隔热罩3的边框和防火隔热条2之间，防火隔热罩3的边框起到了防火隔热条2的作用，而无需再在防火隔热罩3的边框处再次设置防火隔热条2，节省了空间。
示例性地，电池模块还包括导热胶层，导热胶层分别设置于圆柱电芯1和蛇形管4之间以及防火隔热条2和圆柱电芯1之间，提高了圆柱电芯1分别与蛇形管4和防火隔热条2之间连接可靠性。
示例性地，防火隔热条2的长度与蛇形管4的管道长度相等，由于蛇形管4呈弯曲状态，防火隔热条2的长度大于蛇形管4沿直线方向的长度，使防火隔热条2充分隔离开相邻两排圆柱电芯1，以防火隔热，提高了可靠性和安全性。本实施例中，如图1所示，蛇形管4长度不小于整排圆柱电芯1的长度，以使每个圆柱电芯1充分冷却，提高了多个圆柱电芯1的温度均一性，防火隔热条2两端延伸至防火隔热罩3在四周的边框处，充分隔热且不会增大体积。
示例性地，防火隔热条2的宽度不大于圆柱电芯1的高度，避免增大电池模块沿圆柱电芯1高度方向的尺寸；且防火隔热条2的宽度不小于蛇形管4的宽度，以便充分防火隔热。
示例性地，设置有多个蛇形管4时，多个蛇形管4的两侧分别通过第一连接管和第二连接管连接，第一连接管设置为进液，第二连接管设置为出液，从而使蛇形管4内的冷却液进行液体循环，实现冷却，避免多个蛇形管4分别与外部进行连通实现液体循环，简化了结构；另外，连接管连接多个蛇形管4，使多个蛇形管4之间的结构相对稳定，提高了结构稳定性和可靠性。示例性地，第一连接管可以与外部冷却液的出液装置连通，第二连接管可以与外部冷却液回收装置连通。
示例性地，如图1所示，防火隔热罩3上开设有管孔31，连接管穿设于管孔31；示例性地，防火隔热条2上开设有孔位，连接管能够穿设于孔位及管孔31；示例性地，孔位中心线与管孔31的中心线重合，以便于穿设连接管；或者防火隔热条2上开设有避空区域，不会阻挡连接管穿设。
示例性地，蛇形管4上设有连接头，连接头与连接管通过卡箍连接，提高连接可靠性。
本申请提供的一种电池模块及电池模组，防火隔热条设置于相邻两组圆柱电芯的间隙之间，圆柱电芯出现小范围热失控时，可以很好阻隔相邻两组圆柱电芯之间的传热；通过使用防火隔热条，能够替代灌封胶或者发泡胶，由于防火隔热条结构较小，提高了整个电池模块的能量密度；防火隔热罩罩设于多组圆柱电芯外部，能够用于设置于同一电池模组内的不同电池模块之间的热量阻隔和火焰传递；通过使用防火隔热罩，能够替代电池模块的外壳，防止了外部 液冷管上凝水滴在圆柱电芯上发生短路，提高了安全性。

Claims (10)

  1. 一种电池模块，包括：
    多组圆柱电芯(1)，多组所述圆柱电芯(1)平行间隔设置；
    多个防火隔热条(2)，所述防火隔热条(2)的材质为防火且隔热的材质，多个所述防火隔热条(2)平行设置，所述防火隔热条(2)设置于相邻两组所述圆柱电芯(1)之间；
    防火隔热罩(3)，所述防火隔热罩(3)的材质为防火且隔热的材质，所述防火隔热罩(3)罩设于多组所述圆柱电芯(1)外部。
  2. 根据权利要求1所述的电池模块，其中，每组所述圆柱电芯(1)包括两排以上所述圆柱电芯(1)，所述电池模块还包括设置于相邻两排所述圆柱电芯(1)之间的蛇形管(4)。
  3. 根据权利要求2所述的电池模块，其中，每组所述圆柱电芯(1)包括两排所述圆柱电芯(1)，设置有多组所述圆柱电芯(1)时，所述防火隔热条(2)和所述蛇形管(4)交替设置。
  4. 根据权利要求2所述的电池模块，还包括导热胶层，所述导热胶层分别设置于所述圆柱电芯(1)和所述蛇形管(4)之间以及所述防火隔热条(2)和所述圆柱电芯(1)之间。
  5. 根据权利要求2所述的电池模块，其中，所述防火隔热条(2)的长度与所述蛇形管(4)的管道长度相等。
  6. 根据权利要求2所述的电池模块，其中，设置有多个所述蛇形管(4)时，多个所述蛇形管(4)的两侧分别通过第一连接管和第二连接管连接，第一连接管设置为进液，第二连接管设置为出液，所述防火隔热罩(3)上开设有管孔(31)，所述连接管穿设于所述管孔(31)。
  7. 根据权利要求6所述的电池模块，其中，所述蛇形管(4)上设有连接头，所述连接头与所述连接管通过卡箍连接。
  8. 根据权利要求1-7任一项所述的电池模块，其中，所述防火隔热条(2)和所述防火隔热罩(3)均包括隔热层和用于包裹所述隔热层的防火层。
  9. 根据权利要求8所述的电池模块，其中，所述防火层为云母材质的防火层，所述隔热层为石棉材质的隔热层。
  10. 一种电池模组，包括权利要求1-9任一项所述的电池模块。
PCT/CN2022/128982 2021-12-29 2022-11-01 电池模块及电池模组 WO2023124505A1 (zh)

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