Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The battery module comprises: a liquid cooling assembly; the battery assembly comprises a first battery pack and a second battery pack which are alternately arranged; wherein the first battery pack comprises at least one first battery cell, the second battery pack comprises at least one second battery cell, both the first battery cell and the second battery cell are connected to the liquid cooling assembly, a first anti-explosion valve of the first battery cell faces one side of the battery module, and a second anti-explosion valve of the second battery cell faces the other side of the battery module. In the battery pack, the influence of heat released during thermal runaway on the first battery cell and the second battery cell is reduced through the liquid cooling assembly, and meanwhile, the first anti-explosion valve and the second anti-explosion valve are driven to face different sides, so that eruptions are effectively prevented from being erupted to the surrounding anti-explosion valves, and the explosion-proof performance of the battery pack is improved. Therefore, thermal runaway of any cell under the influence of thermal runaway heat and eruption substances is avoided, and thermal runaway diffusion in the battery module is prevented.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module and a battery pack. Background Art

[0002] With the rise of the new energy industry, the use of batteries is becoming more and more widespread. During the use of batteries, thermal runaway has become an important issue affecting the safe use of batteries. The heat released by a single battery cell during thermal runaway is limited and will not cause too serious harm, but the heat released will quickly spread to the surrounding batteries, causing the adjacent batteries to be affected by the heat generated by the thermal runaway. In addition, the explosion-proof valves of the batteries in the same battery module generally face the same direction, causing the ejecta ejected by the batteries during thermal runaway to easily erupt onto the surrounding explosion-proof valves. Therefore, the surrounding batteries are very likely to experience thermal runaway under the influence of the heat and ejecta of the thermal runaway, which in turn triggers a "domino effect", causing the entire battery module to enter the overall thermal runaway stage, releasing huge energy and seriously endangering the safety of electrical equipment and users. Utility Model Content

[0003] In order to overcome at least one of the defects of the above-mentioned prior art, the present application provides a battery module, which can prevent any battery cell from experiencing thermal runaway under the influence of heat and eruptions of thermal runaway, thereby preventing the thermal runaway from spreading within the battery module.

[0004] A battery module according to an embodiment of the application includes: a liquid cooling assembly; a battery assembly, wherein the battery assembly includes a first battery group and a second battery group arranged alternately; wherein: the first battery group includes at least one first battery cell, the second battery group includes at least one second battery cell, the first battery cell and the second battery cell are both connected to the liquid cooling assembly, and the first explosion-proof valve of the first battery cell faces one side of the battery module, and the second explosion-proof valve of the second battery cell faces the other side of the battery module.

[0005] In the present battery module, the first battery cell and the second battery cell are both connected to the liquid cooling assembly, thereby reducing the influence of the heat released during thermal runaway on the adjacent first battery cell and the second battery cell. Meanwhile, the first battery group and the second battery group are alternately arranged, and the first explosion-proof valve and the second explosion-proof valve are respectively oriented to different sides of the battery module, thereby effectively preventing the eruption of materials from being ejected onto the surrounding first explosion-proof valve and the second explosion-proof valve, thereby preventing any battery cell from experiencing thermal runaway under the influence of the heat of thermal runaway and the eruption materials, thereby preventing the thermal runaway from spreading within the battery module.

[0006] According to some embodiments of the present application, the liquid cooling assembly includes a first liquid cooling plate and a second liquid cooling plate. The first explosion-proof valve of the first battery cell faces the first liquid cooling plate, and the second liquid cooling plate is attached to one end of the first battery cell away from the first explosion-proof valve. The second explosion-proof valve of the second battery cell faces the second liquid cooling plate, and the first liquid cooling plate is attached to one end of the second battery cell away from the second explosion-proof valve.

[0007] According to some embodiments of the present application, the first liquid cooling plate is provided with a first flow channel, and the second liquid cooling plate is provided with a second flow channel. The first flow channel is attached to one end of the second battery cell away from the second explosion-proof valve, and the second flow channel is attached to one end of the first battery cell away from the first explosion-proof valve.

[0008] According to some embodiments of the present application, the first liquid cooling plate is provided with a first pressure relief port, and the second liquid cooling plate is provided with a second pressure relief port. The first explosion-proof valve is disposed opposite to the first pressure relief port, and the second explosion-proof valve is disposed opposite to the second pressure relief port.

[0009] According to some embodiments of the present application, it further includes a first isolation member and a second isolation member. The first isolation member closes the first pressure relief port, and the second isolation member closes the second pressure relief port.

[0010] According to some embodiments of the present application, it further includes a protective layer, and the protective layer is disposed on a side of the liquid cooling assembly close to the battery assembly.

[0011] According to some embodiments of the present application, it further includes a heat conducting member, and the heat conducting member is disposed between the liquid cooling assembly and the battery assembly.

[0012] Based on the same inventive concept, the present application also proposes a battery pack, including: a plurality of battery modules as described above.

[0013] According to some embodiments of the present application, a plurality of the battery modules are arranged at intervals, and the adjacent liquid cooling assemblies form a pressure relief channel.

[0014] According to some embodiments of the present application, it further includes a closing member, and the closing member closes the periphery of the pressure relief channel.

[0015] In summary, the battery module provided by the present application has the following technical effects:

[0016] 1) By connecting both the first battery cell and the second battery cell to the liquid cooling component, the influence of the heat released during thermal runaway on the adjacent first battery cell and the second battery cell is reduced. At the same time, the first battery pack and the second battery pack are arranged alternately, and the first explosion-proof valve and the second explosion-proof valve face different sides of the battery module respectively, effectively preventing the ejected substances from spraying onto the surrounding first explosion-proof valve and the second explosion-proof valve, thereby preventing any battery cell from experiencing thermal runaway under the influence of the heat and ejected substances during thermal runaway, and further preventing the spread of thermal runaway within the battery module;

[0017] 2) By forming a pressure relief channel between adjacent liquid cooling components, the pressure relief channel is integrated into the liquid cooling components between the battery modules, enabling the liquid cooling components to simultaneously possess heat dissipation and pressure relief functions, thereby optimizing the overall structure of the battery pack, meeting the requirement of the overall pack for lightweight, and reducing production costs. Description of the Drawings

[0018] Figure 1 Structural schematic diagram of the battery module according to an embodiment of the present application;

[0019] Figure 2 Right view of the battery module according to an embodiment of the present application;

[0020] Figure 3 Left view of the battery module according to an embodiment of the present application;

[0021] Figure 4 Structural schematic diagram of the battery assembly according to an embodiment of the present application;

[0022] Figure 5 Structural schematic diagram of the battery pack according to an embodiment of the present application.

[0023] Among them, the meanings of the reference numerals are as follows:

[0024] 1. Liquid cooling component; 11. First liquid cooling plate; 111. First flow channel; 112. First pressure relief port; 12. Second liquid cooling plate; 121. Second flow channel; 122. Second pressure relief port; 2. Battery assembly; 21. First battery pack; 211. First battery cell; 2111. First explosion-proof valve; 22. Second battery pack; 221. Second battery cell; 2211. Second explosion-proof valve; 3. Pressure relief channel. Detailed Embodiments

[0025] For better understanding and implementation, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0026] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] Referring to Figure 1 , the present application discloses a battery module. The battery module includes a liquid cooling component 1 and a battery component 2. In some embodiments, the battery component 2 includes a first battery group 21 and a second battery group 22 arranged alternately; wherein: the first battery group 21 includes at least one first battery cell 211, the second battery group 22 includes at least one second battery cell 221, both the first battery cell 211 and the second battery cell 221 are connected to the liquid cooling component 1, and the first explosion-proof valve 2111 of the first battery cell 211 faces one side of the battery module, and the second explosion-proof valve 2211 of the second battery cell 221 faces the other side of the battery module. Preferably, by connecting both the first battery cell 211 and the second battery cell 221 to the liquid cooling component 1, the influence of the heat released during thermal runaway on the adjacent first battery cell 211 and second battery cell 221 is reduced. At the same time, the first battery group 21 and the second battery group 22 are arranged alternately, and the first explosion-proof valve 2111 and the second explosion-proof valve 2211 face different sides of the battery module respectively, effectively preventing the ejected matter from spraying onto the surrounding first explosion-proof valve 2111 and second explosion-proof valve 2211, thereby preventing any battery cell from undergoing thermal runaway under the influence of the heat and ejected matter during thermal runaway, and further realizing the prevention of the spread of thermal runaway within the battery module.

[0029] Referring to Figure 4 , optionally, N first battery cells 211 form one first battery group 21, and M second battery cells 221 form one second battery group 22. Further, there may be multiple first battery groups 21 and multiple second battery groups 22 arranged alternately, in the form of: A N |B M |A N |B M....., where N and M are arbitrary positive integers. Optionally, the first battery pack 21 and the second battery pack 22 are arranged alternately along the X-axis direction and / or along the Z-axis direction. Further, referring to Figure 4 , the first battery cells 211 are arranged along the X-axis direction, and the second battery cells 221 are also arranged along the X-axis direction, so that the first battery cells 211 and the second battery cells 221 are adjacent to each other in the Z-axis direction; alternatively, the first battery cells 211 are arranged along the Z-axis direction, and the second battery cells 221 are arranged along the Z-axis direction, so that the first battery cells 211 and the second battery cells 221 are adjacent to each other in the X-axis direction. Among them, the Y-axis direction can be one of the height, width, and length directions of the battery module. Preferably, the Y-axis direction is the width direction of the battery module. Correspondingly, the X-axis direction is the length direction of the battery module, and the Z-axis direction is the height direction of the battery module. Optionally, the first battery cells 211 and the second battery cells 221 are square or cylindrical. Optionally, the positive and negative electrode tabs of the first battery cells 211 and the second battery cells 221 can be arranged on the same side or two opposite sides. Further, CCSs are arranged on both sides of the battery assembly 2. The first battery cells 211 and the second battery cells 221 are cylindrical, and the positive and negative electrode tabs are arranged on two opposite sides. The first battery cells 211 and the second battery cells 221 are welded on different sides through the CCS. For example, the positive electrode tab of the first battery cell 211A1 is electrically connected to the negative electrode tab of the second battery cell 221B1, and the positive electrode tab of the second battery cell 221B1 is electrically connected to the negative electrode tab of the first battery cell 211B2, and so on. Optionally, the liquid cooling assembly 1 can be connected to any side of the first battery cells 211 and the second battery cells 221. Further, by fitting the liquid cooling assembly 1 to any side of the first battery cells 211 and the second battery cells 221, heat exchange between the first battery cells 211 and the second battery cells 221 and the liquid cooling assembly 1 is driven, so as to dissipate heat from the first battery cells 211 and the second battery cells 221 and lower their temperatures.

[0030] Referring to Figure 1 、 Figure 2 and Figure 3, in some embodiments, the liquid cooling assembly 1 includes a first liquid cooling plate 11 and a second liquid cooling plate 12. The first explosion-proof valve 2111 of the first battery cell 211 faces the first liquid cooling plate 11. The second liquid cooling plate 12 is attached to one end of the first battery cell 211 away from the first explosion-proof valve 2111. The second explosion-proof valve 2211 of the second battery cell 221 faces the second liquid cooling plate 12. The first liquid cooling plate 11 is attached to one end of the second battery cell 221 away from the second explosion-proof valve 2211. Optionally, the first liquid cooling plate 11 and the second liquid cooling plate 12 are arranged at intervals in the Y-axis direction and both extend in the X-axis direction, so that the first liquid cooling plate 11 and the second liquid cooling plate 12 form a cooling cavity, and the first battery pack 21 and the second battery pack 22 are alternately arranged in the cooling cavity, so that the first liquid cooling plate 11 and the second liquid cooling plate 12 dissipate heat from the first battery pack 21 and the second battery pack 22; in this embodiment, when any of the first battery cells 211 has a thermal runaway, the first explosion-proof valve 2111 ejects towards the first liquid cooling plate 11, and at the same time, the first liquid cooling plate 11 can cool and dissipate heat from one end of the adjacent second battery cell 221 close to the first explosion-proof valve 2111, so as to avoid the ejecta spraying onto the second explosion-proof valve 2211 and reduce the influence of the heat released during thermal runaway on the adjacent second battery cell 221, thereby fully preventing the spread of thermal runaway in the battery module; when any of the second battery cells 221 has a thermal runaway, the second explosion-proof valve 2211 ejects towards the second liquid cooling plate 12, and at the same time, the second liquid cooling plate 12 can cool and dissipate heat from one end of the adjacent first battery cell 211 close to the second explosion-proof valve 2211, so as to avoid the ejecta spraying onto the first explosion-proof valve 2111 and reduce the influence of the heat released during thermal runaway on the adjacent first battery cell 211, thereby fully preventing the spread of thermal runaway in the battery module.

[0031] Refer to Figure 1 , Figure 2 and Figure 3, in some embodiments, the first liquid cooling plate 11 is provided with a first flow channel 111, and the second liquid cooling plate 12 is provided with a second flow channel 121. The first flow channel 111 is attached to one end of the second battery cell 221 away from the second explosion-proof valve 2211, and the second flow channel 121 is attached to one end of the first battery cell 211 away from the first explosion-proof valve 2111. That is, the first flow channel 111 dissipates heat from and cools one end of the second battery cell 221 away from the second explosion-proof valve 2211, and the second flow channel 121 dissipates heat from and cools one end of the first battery cell 211 away from the first explosion-proof valve 2111. When the first battery cell 211 undergoes thermal runaway, the first explosion-proof valve 2111 ejects towards the first liquid cooling plate 11, and the first flow channel 111 cools and dissipates heat from one end of the second battery cell 221 close to the first explosion-proof valve 2111, reducing the impact of the heat released during thermal runaway on the adjacent second battery cell 221. Similarly, when the second battery cell 221 undergoes thermal runaway, the second explosion-proof valve 2211 ejects towards the second liquid cooling plate 12, and the second flow channel 121 cools and dissipates heat from one end of the first battery cell 211 close to the second explosion-proof valve 2211, reducing the impact of the heat released during thermal runaway on the adjacent first battery cell 211. Thus, the overall heat dissipation capacity can be effectively improved, and the spread of thermal runaway within the battery module can be prevented.

[0032] Refer to Figure 1 , Figure 2 and Figure 3 , in some embodiments, a corresponding pressure relief structure may be provided on the first liquid cooling plate 11 and arranged opposite to the first explosion-proof valve 2111, and a corresponding pressure relief structure may also be provided on the second liquid cooling plate 12 and arranged opposite to the second explosion-proof valve 2211, so that both the first explosion-proof valve 2111 and the second explosion-proof valve 2211 can relieve pressure through the corresponding pressure relief structures. Preferably, the first liquid cooling plate 11 is provided with a first pressure relief port 112, and the second liquid cooling plate 12 is provided with a second pressure relief port 122. The first explosion-proof valve 2111 is arranged opposite to the first pressure relief port 112, and the second explosion-proof valve 2211 is arranged opposite to the second pressure relief port 122. That is, the first explosion-proof valve 2111 relieves pressure through the first pressure relief port 112, and the second explosion-proof valve 2211 relieves pressure through the second pressure relief port 122. Optionally, the first pressure relief port 112 corresponds one-to-one to the first explosion-proof valve 2111; optionally, the first pressure relief port 112 corresponds one-to-one to the first battery pack 21; optionally, the second pressure relief port 122 corresponds one-to-one to the second explosion-proof valve 2211; optionally, the second pressure relief port 122 corresponds one-to-one to the second battery pack 22.

[0033] Furthermore, at least one first flow channel 111 is provided on the first liquid cooling plate 11, and the first pressure relief port 112 is opened in the non-flow channel area of the first liquid cooling plate 11. Therefore, the non-explosion-proof valve area at one end of the first battery cell 211 close to the first liquid cooling plate 11 abuts against the first flow channel 111. That is, the first battery cell 211 is cooled by heat dissipation through the first flow channel 111 and the second flow channel 121 together. Similarly, at least one second flow channel 121 is provided on the second liquid cooling plate 12, and the second pressure relief port 122 is opened in the non-flow channel area of the second liquid cooling plate 12. Therefore, the non-explosion-proof valve area at one end of the second battery cell 221 close to the second liquid cooling plate 12 abuts against the second flow channel 121. That is, the second battery cell 221 is also cooled by heat dissipation through the first flow channel 111 and the second flow channel 121 together. The first liquid cooling plate 11 and the second liquid cooling plate 12 are used to simultaneously cool the two opposite sides of the first battery cell 211 and the second battery cell 221, improving the overall heat dissipation capacity and reducing the probability of thermal runaway in the battery module.

[0034] In some embodiments, a heat conducting member is further included, and the heat conducting member is disposed between the liquid cooling assembly 1 and the battery assembly 2. Specifically, a first heat conducting member is disposed between the first liquid cooling plate 11 and the battery assembly 2, and a second heat conducting member is disposed between the second liquid cooling plate 12 and the battery assembly 2. Optionally, the first heat conducting member is formed by a heat conducting structural adhesive coated on the first liquid cooling plate 11, and the second heat conducting member is formed by a heat conducting structural adhesive coated on the second liquid cooling plate 12. Preferably, the first flow channel 111 is in full contact with the second battery cell 221 and the non-explosion-proof valve area at one end of the first battery cell 211 close to the first liquid cooling plate 11 through the first heat conducting member, and at the same time, the second flow channel 121 is in full contact with the first battery cell 211 and the non-explosion-proof valve area at one end of the second battery cell 221 close to the second liquid cooling plate 12 through the second heat conducting member, thereby improving the heat transfer efficiency between the battery cell and the liquid cooling plate and further optimizing the overall heat dissipation capacity.

[0035] In some embodiments, when any battery cell experiences thermal runaway, its explosion-proof valve will eject the winding core material inside the battery cell. Therefore, the ejecta ejected during thermal runaway can cause a short circuit in the surrounding circuit. Preferably, it further includes a first isolation member and a second isolation member. The first isolation member closes the first pressure relief port 112, and the second isolation member closes the second pressure relief port 122. By respectively closing the first pressure relief port 112 and the second pressure relief port 122 with the first isolation member and the second isolation member, when any of the first explosion-proof valves 2111 or the second explosion-proof valves 2211 ejects, the ejecta can only break through the area opposite to the explosion-proof valve, while the remaining area remains closed, thereby preventing the ejecta from spraying onto adjacent devices or components. Optionally, the first isolation member and the second isolation member are made of an insulating material with good heat resistance and chemical stability. Preferably, both the first isolation member and the second isolation member are mica papers.

[0036] In some embodiments, it further includes a protective layer, and the protective layer is disposed on the side of the liquid cooling assembly 1 close to the battery assembly 2. Specifically, a first protective layer is disposed on the side of the first liquid cooling plate 11 close to the battery assembly 2, and a second protective layer is disposed on the side of the second liquid cooling plate 12 close to the battery assembly 2. Optionally, by spraying an insulating powder material with excellent voltage resistance on the first liquid cooling plate 11 and the second liquid cooling plate 12, the first protective layer and the second protective layer are respectively formed on the first liquid cooling plate 11 and the second liquid cooling plate 12. In this embodiment, the protective layer prevents the ejecta from directly impacting the first liquid cooling plate 11 or the second liquid cooling plate 12, improves the protection of the first liquid cooling plate 11 and the second liquid cooling plate 12, avoids the ejecta from damaging the first liquid cooling plate 11 or the second liquid cooling plate 12, increases the service life of the first liquid cooling plate 11 or the second liquid cooling plate 12, and at the same time can also prevent the battery assembly 2 from forming a path with the first liquid cooling plate 11 or the second liquid cooling plate 12, resulting in leakage, short circuit and other situations.

[0037] Refer to Figure 5 , in some embodiments, a battery pack includes: a plurality of battery modules as described above.

[0038] Refer to Figure 5 , in some embodiments, a plurality of the battery modules are arranged at intervals, and adjacent liquid cooling assemblies 1 form a pressure relief channel 3. Preferably, by forming the pressure relief channel 3 with adjacent liquid cooling assemblies 1, the pressure relief channel 3 is integrated into the liquid cooling assemblies 1 between the battery modules, enabling the liquid cooling assemblies 1 to simultaneously have the functions of heat dissipation and pressure relief, thereby optimizing the overall structure of the battery pack, meeting the requirement of overall pack lightweight, and reducing production costs.

[0039] Further, in adjacent battery modules, the first liquid cooling plate 11 of one battery module and the second liquid cooling plate 12 of another battery module form a pressure relief channel 3, preventing the ejecta ejected from the first explosion-proof valve 2111 or the second explosion-proof valve 2211 in one battery module from directly passing through the first pressure relief port 112 or the second pressure relief port 122 in another battery module and triggering thermal runaway of the first explosion-proof valve 2111 or the second explosion-proof valve 2211 in another battery module.

[0040] In some embodiments, it further includes a sealing member that seals the periphery of the pressure relief channel 3. Optionally, the sealing member can be made of aluminum alloy material. Further, the sealing member is made of an aluminum alloy material with high strength and fire resistance; in this embodiment, the sealing member is assembled between two adjacent liquid cooling components 1 that form the pressure relief channel 3 and extends along the edge of the liquid cooling component 1, so that the sealing member seals the periphery of the pressure relief channel 3, driving the pressure relief channel 3 to form a closed pressure relief cavity, preventing the ejecta entering the pressure relief channel 3 from flowing out and affecting other battery modules or equipment in the battery pack.

[0041] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 In some embodiments, since the space of the battery pack in the Z-axis direction is small and cannot meet the requirement of arranging several battery modules at intervals in the Z-axis direction, to optimize the utilization of the internal space of the battery pack, the first battery cell 211 and the second battery cell 221 both extend in the Y-axis direction. Correspondingly, the liquid cooling component 1 extends in the X-axis direction, so that the ends of the first battery cell 211 and the second battery cell 221 can be attached to the liquid cooling component 1, thereby realizing the arrangement of several battery modules at intervals in the Y-axis direction and solving the problem of the small space of the battery pack in the Z-axis direction. Wherein the height direction of the battery module is parallel to the height direction of the battery pack, the width direction of the battery module is parallel to the width direction of the battery pack, and the length direction of the battery module is parallel to the length direction of the battery pack.

[0042] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5, in some embodiments, a plurality of the battery modules are arranged at intervals inside the battery pack. Each battery module contains the first battery cell 211 and the second battery cell 221 that extend along the Y-axis direction. The first liquid cooling plate 11 and the second liquid cooling plate 12 are respectively arranged on both sides along the Y-axis direction. The first liquid cooling plate 11 and the second liquid cooling plate 12 extend along the X-axis direction, driving the first liquid cooling plate 11, the second liquid cooling plate 12, the first battery cell 211, and the second battery cell 221 to form the battery module, enabling a plurality of the battery modules to be arranged at intervals along the Y-axis direction, and solving the problem that the space of the battery pack is small along the Z-axis direction. Further, among two adjacent battery modules in the Y-axis direction, the first liquid cooling plate 11 of one battery module and the second liquid cooling plate 12 of the other battery module form a pressure relief channel 3, driving the liquid cooling assembly 1 to simultaneously have the functions of heat dissipation and pressure relief, thereby optimizing the overall structure of the battery pack and meeting the requirement of the whole pack for light weight. Optionally, the periphery of the pressure relief channel 3 is enclosed by a sealing member, driving the pressure relief channel 3 to form a closed pressure relief cavity to prevent the ejected material entering the pressure relief channel 3 from flowing out and affecting other battery modules or the equipment inside the battery pack; preferably, inside each battery module, the first explosion-proof valve 2111 of the first battery cell 211 faces the first pressure relief port 112 of the first liquid cooling plate 11, the second explosion-proof valve 2211 of the second battery cell 221 faces the second pressure relief port 122 of the second liquid cooling plate 12, and at least one first battery cell 211 forms the first battery group 21, and at least one second battery cell 221 forms the second battery group 22 that is alternately arranged with the first battery group 21, effectively avoiding the ejected material spraying onto the surrounding first explosion-proof valve 2111 and second explosion-proof valve 2211. At the same time, the second flow channel 121 of the second liquid cooling plate 12 fits to the non-explosion-proof valve area at one end of the first battery cell 211 away from the first explosion-proof valve 2111 and at one end of the second battery cell 221 close to the second liquid cooling plate 12, and the first flow channel 111 of the first liquid cooling plate 11 fits to the non-explosion-proof valve area at one end of the second battery cell 221 away from the second explosion-proof valve 2211 and at one end of the first battery cell 211 close to the first liquid cooling plate 11, realizing simultaneous heat dissipation and cooling of the two opposite sides of the first battery cell 211 and the second battery cell 221, improving the overall heat dissipation capacity, reducing the probability of thermal runaway occurring inside the battery module and the influence of the heat released during thermal runaway on the adjacent first battery cell 211 and second battery cell 221, thereby avoiding any battery cell from undergoing thermal runaway under the influence of the heat and ejected material during thermal runaway, and further preventing the spread of thermal runaway inside the battery module.

[0043] The technical means disclosed in the solution of this application are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of this application.

Claims

1. A battery module, characterized in that, Comprising: A liquid cooling component (1); A battery component (2), the battery component (2) comprising a first battery pack (21) and a second battery pack (22) arranged alternately; wherein: The first battery pack (21) comprises at least one first battery cell (211), the second battery pack (22) comprises at least one second battery cell (221), both the first battery cell (211) and the second battery cell (221) are connected to the liquid cooling component (1), and a first explosion-proof valve (2111) of the first battery cell (211) faces one side of the battery module, and a second explosion-proof valve (2211) of the second battery cell (221) faces the other side of the battery module.

2. The battery module according to claim 1, wherein: The liquid cooling component (1) comprises a first liquid cooling plate (11) and a second liquid cooling plate (12), the first explosion-proof valve (2111) of the first battery cell (211) faces the first liquid cooling plate (11), the second liquid cooling plate (12) is attached to one end of the first battery cell (211) away from the first explosion-proof valve (2111), the second explosion-proof valve (2211) of the second battery cell (221) faces the second liquid cooling plate (12), and the first liquid cooling plate (11) is attached to one end of the second battery cell (221) away from the second explosion-proof valve (2211).

3. The battery module according to claim 2, characterized in that: The first liquid cooling plate (11) is provided with a first flow channel (111), the second liquid cooling plate (12) is provided with a second flow channel (121), the first flow channel (111) is attached to one end of the second battery cell (221) away from the second explosion-proof valve (2211), and the second flow channel (121) is attached to one end of the first battery cell (211) away from the first explosion-proof valve (2111).

4. The battery module according to claim 2, characterized in that: The first liquid cooling plate (11) is provided with a first pressure relief port (112), the second liquid cooling plate (12) is provided with a second pressure relief port (122), the first explosion-proof valve (2111) is arranged opposite to the first pressure relief port (112), and the second explosion-proof valve (2211) is arranged opposite to the second pressure relief port (122).

5. The battery module according to claim 4, wherein: It further comprises a first isolation member and a second isolation member, the first isolation member closes the first pressure relief port (112), and the second isolation member closes the second pressure relief port (122).

6. The battery module according to any one of claims 1-5, characterized in that: It further comprises a protective layer, the protective layer is arranged on a side of the liquid cooling component (1) close to the battery component (2).

7. The battery module according to any one of claims 1-5, characterized in that: It further comprises a heat conducting member, the heat conducting member is arranged between the liquid cooling component (1) and the battery component (2).

8. A battery pack, characterized in that, Comprising: A plurality of battery modules as described in any one of claims 1-7.

9. The battery pack according to claim 8, wherein: A plurality of the battery modules are arranged at intervals, and adjacent liquid cooling components (1) form a pressure relief channel (3).

10. The battery pack according to claim 9, wherein: It further comprises a sealing member, the sealing member closes the periphery of the pressure relief channel (3).

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