Battery module and battery pack

Abstract

The utility model provides a battery module which has a first direction and a second direction which are intersected, the battery module comprises a shell, a plurality of single batteries and at least one isolation plate, the single batteries and the isolation plates are arranged in the shell, the single batteries are arranged in an array along the first direction and the second direction, and the isolation plates are arranged in the first direction and the second direction. The isolation plates are arranged between the adjacent single batteries in the second direction, and the isolation plates extend in the first direction; and the areas outside the single batteries and the isolation plates in the shell are filled with pouring sealant layers. And the isolation plate is designed between the two adjacent strings of single batteries, so that heat spreading between the series connection of the single batteries is prevented, and the safety and reliability of the battery pack are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery module and battery pack. Background Technology

[0002] With the rapid development of the new energy industry, electric bicycles, scooters, motorcycles and other products have been widely used. Battery modules, mainly lithium battery modules, are highly favored due to their high energy density and energy conversion efficiency.

[0003] Battery modules consist of multiple individual cells connected in series and parallel. During charging and discharging, they release heat, making them highly susceptible to thermal runaway. Once a single cell experiences thermal runaway, it can quickly spread to other cells, triggering a chain reaction of thermal runaway—a phenomenon known as thermal propagation—leading to serious safety incidents such as smoke, fire, and explosion of the battery module. Current battery module designs do not incorporate sufficient protective measures against thermal propagation. Utility Model Content

[0004] This utility model provides a battery module and battery pack to solve the problem of thermal runaway of a single cell affecting surrounding cells in related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] In a first aspect, this utility model provides a battery module having intersecting first and second directions, comprising: a housing, a plurality of individual batteries disposed within the housing, and at least one separator plate, wherein...

[0007] The plurality of said individual cells are arranged in an array along the first direction and the second direction, the separator is disposed between adjacent individual cells along the second direction, and the separator extends along the first direction;

[0008] The area inside the casing, excluding the individual battery cells and the separator, is filled with a potting compound layer.

[0009] Optionally, the insulating plate includes at least one layer of heat insulation board.

[0010] Optionally, the insulation board is an aerogel insulation board.

[0011] Optionally, the insulating plate further includes at least one heat-absorbing plate connected to the insulating plate.

[0012] Optionally, the heat absorber is a phase change material heat absorber.

[0013] Optionally, the dimension of the isolation plate in the second direction is D, which satisfies: 2mm≤D≤3mm.

[0014] Optionally, the single cell has a positive electrode, and a protective member is provided on one side of the positive electrode. The protective member passes through the potting compound layer and partially extends outside the potting compound layer. In the event of overheating of the positive electrode, the protective member melts and forms a channel in the potting compound that communicates with the positive electrode.

[0015] Optionally, the protective component is a foam protective component.

[0016] Optionally, the positive electrodes of the individual cells in the same column in the first direction are located at the same end, and the protective member covers the positive electrodes of the individual cells in the same column.

[0017] Secondly, this utility model also provides a battery pack, including any of the battery modules provided in the first aspect.

[0018] This invention provides a battery module having intersecting first and second directions. The battery module includes: a housing, a plurality of individual cells disposed within the housing, and at least one separator plate. The plurality of individual cells are arranged in an array along the first and second directions. The separator plate is disposed between adjacent individual cells along the second direction and extends along the first direction. The area within the housing outside the individual cells and the separator plate is filled with a potting compound layer. The separator plate designed between adjacent strings of individual cells prevents heat propagation between series-connected individual cells, improving the safety and reliability of the battery pack. Attached Figure Description

[0019] Figure 1 This is an exploded view of a battery module provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram illustrating the assembly of the battery module provided in an embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram showing the encapsulating adhesive layer covering a single battery cell and a separator provided in an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional view of the battery module provided in an embodiment of the present invention;

[0023] Figure 5 One of the schematic diagrams shows the isolation plate provided in an embodiment of this utility model;

[0024] Figure 6 A second schematic diagram illustrating the isolation plate provided in an embodiment of this utility model;

[0025] Figure 7 Schematic diagram three illustrating the isolation plate provided in this embodiment of the present utility model;

[0026] Figure 8 This is the fourth schematic diagram showing the isolation plate provided in the embodiment of this utility model.

[0027] Figure label:

[0028] 100: Battery module; 10: Housing; 20: Single cell; 21: Positive electrode; 30: Separator; 31: Heat insulation plate; 32: Heat absorption plate; 40: Encapsulating layer; 50: Protective component; 60: Busbar. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0031] like Figures 1 to 2 As shown, this utility model embodiment provides a battery module 100 having intersecting first and second directions, including: a housing 10, a plurality of individual battery cells 20 disposed in the housing 10 and at least one separator 30, wherein the plurality of individual battery cells 20 are arranged in an array along the first and second directions, the separator 30 is disposed between adjacent individual battery cells 20 along the second direction, and the separator 30 extends along the first direction; the area inside the housing 10 outside the individual battery cells 20 and the separator 30 is filled with a potting compound layer 40.

[0032] Because the voltage and capacity of a single battery cell 20 are limited, they need to be combined in series and parallel in practical applications to obtain higher voltage and capacity to meet the actual power supply requirements of the equipment. Multiple single batteries 20 are arranged in an array along intersecting first and second directions, connected in series and parallel to form a battery cluster. Single batteries 20 arranged in a row along the first direction are connected in parallel to form a parallel battery pack, and multiple parallel battery packs arranged in a row along the second direction are connected in series. In parallel connections, the voltage of the single batteries 20 remains constant, their capacities are added together, their internal resistance decreases, and their power supply time is extended; in series connections, the voltage of the single batteries 20 is added together, their capacity remains constant, but their internal resistance increases.

[0033] The separator 30 is positioned between adjacent strings to separate the individual battery cells 20 connected in series. Encapsulating adhesive is injected into the housing 10, encapsulating the individual battery cells 20 and the separator 30 within the encapsulating adhesive layer 40. This fills the gaps between the individual battery cells 20, adjacent individual battery cells 20, and the separator 30, thus fixing, supporting, and limiting the battery module 100. After curing, the encapsulating adhesive exhibits good heat resistance, allowing it to function normally at high temperatures and preventing deformation of the battery module 100. Simultaneously, the encapsulating adhesive also has high thermal conductivity, allowing the heat generated by the individual battery cells 20 during operation to be released to the external environment through the housing 10, thus aiding in heat dissipation. Since the potting compound layer 40 can play a certain role in fixing the individual cells 20, multiple individual cells 20 can be fixed without the use of brackets. The multiple individual cells 20 can be directly arranged and placed into the housing 10 or the fixture. In the battery cluster, the isolation plates 30 are set at intervals along the second direction to isolate the individual cells 20 arranged in rows in the second direction. The battery management system (BMS) is connected, and then the potting compound is injected to complete the support and fixation of the battery module 100.

[0034] While the high thermal conductivity of the potting compound helps dissipate heat, it also means that the potting compound layer 40 cannot prevent heat transfer between the individual cells 20 encapsulated within it. When a single cell 20 experiences thermal runaway, heat is transferred through the potting compound layer 40 to the cells 20 connected in parallel, continuing until all the parallel cells 20 experience thermal runaway. However, cells 20 connected in series with the affected cell 20, due to the presence of a heat-insulating separator 30, are unaffected by the adjacent thermally runaway cells 20 and maintain normal operation, effectively suppressing heat propagation between the series-connected cells.

[0035] Adjacent cells 20 are separated by a separator 30. After potting, the adhesive fills the gaps between cells 20 and the separator 30, thus fixing the cells 20 in place. When one cell 20 experiences thermal runaway, the heat will spread to the surrounding area. The separator 30 and the adhesive work together to contain the cells 20 connected in series, and the potting compound 40 effectively limits the individual cells 20, preventing explosions and structural deformation of the battery module 100 after a single cell's runaway. The separator 30 prevents heat transfer between the cells 20 connected in series, thus preventing thermal runaway and effectively suppressing heat propagation. However, cells 20 connected in parallel only have the potting compound 40 between them, which cannot prevent heat transfer. Heat spreading to the parallel cells 20 will trigger their thermal runaway, continuing until all parallel cells 20 experience thermal runaway.

[0036] In some alternative embodiments, the partition 30 includes at least one layer of insulation 31.

[0037] The separator 30 serves to block heat transfer between adjacent individual cells 20. Therefore, the separator 30 includes at least one heat-insulating plate 31 with good heat resistance. The heat-insulating plate 31 needs to have a low thermal conductivity (<0.1W / mK) and a high operating temperature (>600℃) to maintain its integrity under thermal runaway conditions. Furthermore, the separator 30 can be designed as a layered structure, composed of multiple layers of heat-insulating plates 31 as needed. Each layer of heat-insulating plate 31 can be made of the same material or different materials.

[0038] In some alternative embodiments, the insulation panel 31 is an aerogel insulation panel 31.

[0039] Thermal insulation panels 31 typically use aerogel materials. Aerogel has a nanoporous mesh structure and a very low bulk density. Because its pore size is smaller than the mean free path of air molecules at normal pressure, the air molecules in the aerogel pores are approximately stationary, thus limiting convective heat transfer from the air. The thermal conductivity can reach below 0.013 W / mK, resulting in excellent thermal insulation performance.

[0040] In some alternative embodiments, the insulating plate 30 further includes at least one heat-absorbing plate 32 connected to the heat insulation plate 31.

[0041] The heat insulation plate 31 can only cut off the heat transfer between adjacent individual cells 20, but heat still accumulates in the battery module 100. Once a single cell 20 begins thermal runaway, it cannot be stopped until the internal reactants are exhausted. During this process, heat will continue to be released, causing the temperature of the single cell 20 to rise continuously. When the heat released by the single cell 20 reaches a certain level, the temperature of the single cell 20 exceeds the working limit of the heat insulation plate 31, which will still affect adjacent individual cells 20.

[0042] Therefore, the heat insulation plate 31 can be used in conjunction with the heat absorption plate 32. The heat absorption plate 32 is set close to the heat insulation plate 31. The heat absorption plate 32 can be placed on the side closer to the individual battery 20, absorbing heat first and then insulating it; or it can be placed on the side farther away from the individual battery 20, insulating it first and then absorbing heat. The heat insulation plate 31 isolates the generated heat within the row of individual batteries 20 where the thermally runaway individual battery 20 is located. The heat absorption plate 32 absorbs the heat released by the thermally runaway individual battery 20, storing it or releasing it to the external environment through the casing 10, quickly reducing the temperature in the battery module 100. The heat is then released after the battery module 100 has cooled down. In practical applications, the combustion process of individual batteries 20, mainly lithium batteries, is very fast. A row of individual batteries can release a large amount of heat in a short time. Adding the heat absorption plate 32 to the heat insulation plate 30 can improve the working limit of the heat insulation plate 30, enabling it to insulate and dissipate heat when a large amount of heat is released in a short time, effectively suppressing the heat spread between battery modules 100 and improving the reliability of the battery module 100.

[0043] In some alternative embodiments, the heat absorber 32 is a phase change material heat absorber 32.

[0044] In practical applications, phase change materials (PCMs) are often used as heat absorbers 32. PCMs are substances that change their state of matter while maintaining a constant temperature and can provide latent heat. The process by which PCMs transform their physical properties is called a phase change process, during which the PCM absorbs or releases a large amount of latent heat. Taking solid-liquid phase change as an example, when heated to the melting temperature, a phase change occurs from solid to liquid. During melting, the PCM absorbs and stores a large amount of latent heat. When the PCM cools, the stored heat is released into the environment within a certain temperature range, undergoing a reverse phase change from liquid to solid. When the physical state changes, the material's own temperature remains almost constant before the phase change is complete, forming a wide temperature plateau that can store a large amount of heat. This allows the PCM to absorb a large amount of heat released from the thermal runaway of the individual battery cells 20, ensuring that the battery module 100 operates within its normal temperature range.

[0045] It should be noted that phase change materials undergo a physical transformation from a solid to a liquid state during the phase change process. After transforming into a liquid state, the phase change material becomes fluid. Therefore, when potting the encapsulant, the encapsulant must completely cover the top of the separator 30, encapsulating all individual cells 20 and the separator 30 within the encapsulant layer 40. This forms a high-temperature resistant sealed outer shell around the heat absorber 32, preventing the phase change material constituting the heat absorber 32 from flowing to other locations after transforming into a liquid state. Alternatively, an outer shell can be added to the heat absorber 32, with the phase change material placed inside the shell to form the heat absorber 32. Alternatively, a high thermal conductivity, high-temperature resistant outer shell can be applied to the outside of the separator 30, which consists of the heat insulation plate 31 and the heat absorber 32, to fix and constrain the internal phase change material.

[0046] Commonly used phase change materials can be divided into inorganic phase change materials and organic phase change materials, including crystalline hydrated salts, molten salts (nitrates, carbonates, halides, etc.), metals, paraffins, and non-paraffins. In this embodiment of the present invention, the heat absorption plate 32 generally uses an inorganic phase change material with a phase change point of about 40 to 50 degrees Celsius. 40 to 50 degrees Celsius is usually the upper limit of the normal operating temperature of a single cell 20. Exceeding this temperature may lead to thermal runaway, so it is necessary to take cooling and heat dissipation measures.

[0047] Furthermore, the isolation plate 30 has a layered structure, allowing for the selection and combination of appropriate materials for the insulation plate 31 and heat-absorbing plate 32 to achieve different insulation effects. It is important to note that the core of the insulation function of the isolation plate 30 is the insulation plate 31, while the heat-absorbing plate 32 primarily serves to balance the temperature and increase the upper limit of heat capacity. Regardless of the combination, the isolation plate 30 must always include at least one layer of insulation plate 31.

[0048] The design of the isolation plate 30 is as follows Figures 5-8 As shown, this embodiment provides the following four combination schemes:

[0049] (a) A single aerogel is used to form an isolation plate 30, which inhibits heat spread through the good thermal insulation effect of the aerogel;

[0050] (b) An isolation plate 30 is formed by aerogel + phase change material + aerogel. The aerogel at both ends can play a heat insulation role. The heat that exceeds the limit of aerogel can be absorbed by the phase change material to achieve the effect of inhibiting heat spread.

[0051] (c) A phase change material + aerogel + phase change material is used to form an isolation plate 30. The phase change materials at both ends can absorb part of the heat generated by the thermal runaway of the battery cell, and the remaining part can be isolated by the aerogel in the middle to achieve the effect of suppressing heat spread.

[0052] (d) A phase change material + aerogel is used to form an isolation plate 30. The heat spread is suppressed by the interaction between the heat absorption of the phase change material and the heat isolation of the aerogel.

[0053] Experiments revealed that the solution using a single aerogel to form the separator 30 exhibited the best performance in terms of pure thermal insulation, resisting the highest thermal runaway temperature. The use of aerogel + phase change material + aerogel to form the separator 30 improved the heat dissipation capacity of the battery module 100 while providing thermal insulation. The thermal runaway temperature was lower compared to the case using only the insulation plate 31, and the temperature difference between different locations within the battery module 100 was also smaller, improving the temperature uniformity of the battery module 100.

[0054] The heat absorber plate 32 can be set on the outside of the separator plate 30 and directly contact the single cell 20. The heat released by the single cell 20 is first absorbed by the heat absorber plate 32, and the overflowing heat is isolated by the heat insulation plate 31. Alternatively, it can be set on the inside of the separator plate 30 and indirectly contact the single cell 20 through the heat insulation plate 31. The heat that exceeds the limit of the heat insulation plate 31 can be absorbed by the heat absorber plate 32.

[0055] In addition, in some alternative embodiments, the size of the isolation plate 30 in the second direction is D, which satisfies: 2mm≤D≤3mm.

[0056] In practical applications, regardless of the number of layers the separator 30 has, whether it consists solely of aerogel or is a composite structure formed by aerogel and phase change materials, the total thickness of a separator 30 should be controlled within the range of 2mm to 3mm, taking into account both heat insulation performance and battery pack assembly. The thickness of the separator 30 directly affects its heat insulation performance; the thicker the separator 30, the better the heat insulation effect and the less impact adjacent individual cells 20 are affected. However, due to the limited space in the battery pack, a separator 30 is required between every two strings of individual cells 20. The thickness of the separator 30 cannot be increased indefinitely to avoid wasting battery capacity.

[0057] In addition, in some alternative embodiments, the single cell 20 has a positive electrode 21, and a protective member 50 is provided on one side of the positive electrode 21. The protective member 50 passes through the potting compound layer 40 and extends partially outside the potting compound layer 40. In the event of overheating of the positive electrode 21, the protective member 50 melts and forms a channel in the potting compound layer 40 that communicates with the positive electrode 21.

[0058] like Figure 1 As shown, this embodiment uses a cylindrical battery, which is placed horizontally in the casing 10, with the positive electrode 21 and the negative electrode at its two ends, respectively. The positive electrode 21 is the most unstable position of the single cell 20 during operation. Under full charge, it decomposes to produce oxygen. After the temperature exceeds 140°C, both the positive and negative electrode materials participate in the electrochemical reaction. After reaching this temperature range, the separator begins to melt in large quantities, and the positive and negative electrodes are directly connected, causing a large-scale short circuit. In a short time, the violent reaction generates a large amount of gas and heat, which in turn heats the gas. The expanding gas breaks through the casing of the cylindrical battery, causing phenomena such as material ejection. Therefore, the positive electrode 21 of the single cell 20 is generally equipped with an explosion-proof valve to release pressure in time when a large amount of gas and liquid are generated inside the positive electrode 21, preventing the single cell 21 from deforming and exploding.

[0059] In this embodiment, the single cell 20 is encapsulated in a potting compound layer 40. The potting compound has good heat resistance and does not melt even when the battery burns to 1000 degrees Celsius. The sealed potting compound layer 40 encapsulates the surface of the single cell 20, which would affect the normal pressure relief of the explosion-proof valve at the positive electrode 21. Therefore, a protective component 50 is bonded to the positive electrode 21 as a pressure relief auxiliary device. The protective component 50 melts at around 200 degrees Celsius, forming a channel communicating with the positive electrode 21 at the original location where the protective component 50 was located. This allows substances released at the positive electrode 21 to be discharged through the channel, reducing energy accumulation inside the single cell 20.

[0060] For electrical connection purposes, a busbar 60 is also connected to the positive terminal 21, such as... Figure 4 As shown, the positive electrodes 21 of the individual cells 20 arranged in the first direction are located at the same end, and the negative electrodes are located at the other end. Two sets of busbars 60 extend along the first direction and are connected to the positive electrode 21 and the negative electrode of each individual cell 20 located in the same column, respectively, connecting the individual cells 20 arranged in the same column together in parallel. A protective element 50 is attached to the side of the busbar 60 connected to the positive electrode 21 away from the individual cell 20, covering the positive electrode 21 of the individual cell 20. The tops of the busbar 60 and the protective element 50 are higher than the individual cell 20 and the separator 30. During assembly, the welding of the busbar 60 and the bonding of the protective element 50 are completed first. Then, glue is poured into the housing 10, and the glue covers the top of the individual cell 20 and the separator 30, connecting the individual cell 20, the separator 30, the busbar 60 and the protective element 50 into a whole. Parts of the busbar 60 and the protective element 50 protrude from the potting glue layer 40. The protruding part of the busbar 60 is used for connection with the BMS system. The extended portion of the protective element 50 is used to form a channel connecting the positive electrode 21 with the external environment. After the protective element 50 melts, a hollow channel is formed in the potting compound layer 40 around the original location where the protective element 50 was located. The substances released by the positive electrode 21 are discharged through the channel. A pressure relief valve is provided at the corresponding position of the housing 10 to release the liquid and gas discharged through the channel into the external environment.

[0061] In some embodiments, to enhance the pressure relief effect and improve the safety of the battery pack, explosion-proof valves are provided at both the positive and negative terminals of the individual battery 20. Therefore, a protective component 50 can also be attached to the negative terminal to discharge the substances released by the explosion-proof valve into the external environment.

[0062] In some alternative embodiments, the protective element 50 is a foam protective element 50.

[0063] Foam possesses a series of characteristics such as elasticity, light weight, rapid pressure-sensitive fixation, ease of use, and flexibility. Using foam as a protective component 50 can, on the one hand, protect and buffer the positive electrode 21 and busbar 60; on the other hand, the low density of foam will not add extra weight to the battery pack. When selecting foam, waterproof foam should be used to prevent the injected adhesive from seeping into the foam's gaps and blocking the channels. Furthermore, the melting point should be within the range of 120°C to 240°C, which is basically matched to the temperature at which the single cell 20 experiences thermal runaway and ejection of substances.

[0064] In some alternative embodiments, the positive electrodes 21 of the individual cells 20 in the same column in the first direction are located at the same end, and the protective member 50 covers the positive electrodes 21 of the individual cells 20 in the same column.

[0065] For ease of connection, the individual cells 20 in the same row are arranged in the same direction, with their positive terminals 21 connected to the same busbar 60 and their negative terminals connected to another busbar 60, connected in parallel through a pair of busbars 60. A protective component 50 is bonded to the side of the positive busbar 60 away from the individual cell 20, extending from one end of the busbar 60 to the other, covering the positive terminal 21 of each individual cell 20. Its top extends beyond the potting compound layer 40, penetrating from the bottom to the top of the potting compound layer 40 and communicating with the positive terminal 21. When one of the individual cells 20 triggers thermal runaway, the resulting high temperature will melt the protective component 50 located at the positive terminal 21, thus forming a smoke exhaust channel. When the individual cell 20 experiences thermal runaway, it will emit dense smoke at the positive terminal 21. This smoke exhaust channel allows the dense smoke to be discharged from the battery module 100, preventing energy accumulation inside the battery module 100 and reducing the impact of the individual cell 20's runaway.

[0066] This application provides a battery module 100 having intersecting first and second directions. The battery module 100 includes: a housing 10, a plurality of individual battery cells 20 disposed in the housing 10, and at least one separator 30. The plurality of individual battery cells 20 are arranged in an array along the first and second directions, and the separator 30 is disposed between adjacent individual battery cells 20 along the second direction, extending along the first direction. The area within the housing 10 outside the individual battery cells 20 and the separator 30 is filled with a potting compound layer 40. The separator 30 designed between two adjacent strings of individual battery cells 20 prevents heat propagation between the series-connected individual battery cells 20, improving the safety and reliability of the battery pack.

[0067] On the other hand, this utility model embodiment also discloses a battery pack, including the battery module in any of the above embodiments.

[0068] The battery pack also includes components such as circuit boards, wiring harnesses, and covers, and can be applied to electric bicycles, electric scooters, and other small power battery applications. These devices are widely used, and their charging and storage environments are complex. In the event of thermal runaway, a large amount of heat can be released in a short time, and it is difficult to extinguish, posing a significant safety hazard. The battery pack provided in this embodiment incorporates an isolation layer between adjacent strings of individual cells and a smoke exhaust channel at the positive terminal of each individual cell. This design minimizes the risk of overall pack failure in the event of a single internal cell thermal failure, thus improving the safety and reliability of the battery pack.

[0069] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0070] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the present invention.

[0071] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0072] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery module (100) having a first direction and a second direction which intersect, characterized in that, The battery module (100) comprises: a housing (10), a plurality of single batteries (20) and at least one isolation plate (30) arranged in the housing (10), wherein the plurality of single batteries (20) are arranged in an array along the first direction and the second direction, the isolation plate (30) is arranged between the single batteries (20) adjacent along the second direction, and the isolation plate (30) extends along the first direction; an area in the housing (10) outside the single batteries (20) and the isolation plate (30) is filled with a potting layer (40).

2. The battery module (100) of claim 1, characterized in that The isolation plate (30) comprises at least one heat insulation plate (31).

3. The battery module (100) of claim 2, characterized in that The heat insulation plate (31) is an aerogel heat insulation plate.

4. The battery module (100) of claim 2, wherein, The isolation plate (30) further comprises at least one heat absorption plate (32) connected to the heat insulation plate.

5. The battery module (100) of claim 4, characterized in that The heat absorption plate (32) is a phase change material heat absorption plate.

6. The battery module (100) of claim 1, wherein, The isolation plate (30) has a size D in the second direction, and 2mm≤D≤3mm is satisfied.

7. The battery module (100) of claim 1, wherein, The single battery (20) has a positive electrode (21), a protection member (50) is arranged on one side of the positive electrode (21), the protection member (50) penetrates through the potting layer (40) and partially extends out of the potting layer (40), in the case of overheating of the positive electrode (21), the protection member (50) melts and forms a channel in the potting layer (40) in communication with the positive electrode (21).

8. The battery module (100) of claim 7, characterized in that The protection member (50) is a foam protection member.

9. The battery module (100) of claim 7, wherein, The positive electrodes (21) of the single batteries (20) in the same column in the first direction are located at the same end, and the protection member (50) covers the positive electrodes (21) of the single batteries (20) in the same column.

10. A battery pack, characterized by, The battery module (100) comprises any one of claims 1-9.

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