Cell stacking module, battery module and battery pack
By using a combination of insulation board, foam and heat insulation board in the cell stacking module, the problems of poor heat preservation and low space utilization in traditional cell stacking methods are solved, achieving higher energy density and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional cell stacking methods have poor heat preservation effects, low space utilization, and difficulty in achieving high energy density.
It adopts a combination structure of insulation board, foam and heat insulation board. The insulation board is used for heat preservation, the foam is used to absorb the expansion of the battery cell, the heat insulation board is used to prevent the spread of faults, and the aluminum fins are used for heat dissipation and structural stability.
It improves the thermal insulation performance and space utilization of the cell stacking module, enhances the safety and charging/discharging efficiency of the cells, and increases the energy density of the battery module.
Smart Images
Figure CN224036453U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of battery manufacturing, in particular to a battery cell stacking module, a battery module and a battery pack. BACKGROUND
[0002] With the continuous progress of science and technology, battery technology, as a key technology for energy storage and supply, has been widely applied in many fields, including but not limited to electric vehicles, portable electronic devices, energy storage power stations and the like. The performance and safety of the battery system have always been the focus of the industry, and the performance and safety of the battery cell, as the core component of the battery, are crucial to the normal operation of the entire battery system.
[0003] In the traditional battery technology, the stacking mode of the battery cell is generally to simply stack each battery cell in different forms, and such stacking mode has poor heat preservation effect, and only a certain space is simply reserved for the expansion of the battery cell, resulting in low energy density of the battery system. CONTENT OF THE UTILITY MODEL
[0004] The application provides a battery cell stacking module, a battery module and a battery pack, aiming to solve the problems of poor heat preservation effect, low space utilization and difficulty in achieving high energy density caused by the traditional battery cell stacking mode.
[0005] In order to solve the above technical problems, the application provides a battery cell stacking module, which comprises: a heat preservation plate, a battery cell, a foam and a heat insulation plate.
[0006] The heat preservation plate is provided with two, and the two heat preservation plates are arranged in parallel and at intervals, and a plurality of battery cells, a plurality of foams and a plurality of heat insulation plates are stacked between the two heat preservation plates.
[0007] The foam is used to absorb the expansion of the battery cell, the heat insulation plate is used to cut off the adjacent battery cell to prevent the accident from spreading when the battery cell fails, and the heat preservation plate is used to heat the battery cell stacking module.
[0008] Further, the battery cell stacking module further comprises a plurality of aluminum fins corresponding to the battery cells one by one, the shape of the aluminum fin matches the shape of the battery cell, and the plurality of battery cells and the plurality of aluminum fins are combined together to form a plurality of aluminum fin battery cell combinations.
[0009] Further, the aluminum fin battery cell combination comprises a battery cell exposed surface, and the battery cell exposed surfaces of two adjacent aluminum fin battery cell combinations face opposite directions.
[0010] Further, the plurality of foams are attached to the battery cell exposed surfaces in the aluminum fin battery cell combination.
[0011] Further, the plurality of aluminum fin battery cell assemblies includes a first aluminum fin battery cell assembly and a second aluminum fin battery cell assembly, the plurality of foams includes a first foam, the plurality of heat insulation plates includes a first heat insulation plate, the first aluminum fin battery cell assembly, the first foam, the second aluminum fin battery cell assembly and the first heat insulation plate are sequentially stacked.
[0012] Further, the plurality of aluminum fin battery cell assemblies further includes a third aluminum fin battery cell assembly, the plurality of foams further includes a second foam, the third aluminum fin battery cell assembly is arranged on a side of the first heat insulation plate away from the second aluminum fin battery cell assembly, and the second foam is arranged on a side of the third aluminum fin battery cell assembly away from the first heat insulation plate.
[0013] Further, the plurality of aluminum fin battery cell assemblies further includes a fourth aluminum fin battery cell assembly, a fifth aluminum fin battery cell assembly and a sixth aluminum fin battery cell assembly, the fourth aluminum fin battery cell assembly, the fifth aluminum fin battery cell assembly, a third foam, a second heat insulation plate, a fourth foam and the sixth aluminum fin battery cell assembly are sequentially stacked.
[0014] Further, a plurality of exhaust grooves are arranged on the aluminum fin in a uniform distribution, the exhaust grooves penetrate the aluminum fin, and the exhaust grooves are used for exhausting the battery cell.
[0015] To achieve the above-mentioned utility model purposes, the utility model provides a battery module, the battery module includes the battery cell stacking module.
[0016] To achieve the above-mentioned utility model purposes, the utility model provides a battery module, the battery module includes the battery cell stacking module.
[0017] The application has the beneficial effects that in the battery cell stacking module, the battery module and the battery pack provided by the application, the battery cell stacking module includes the heat preservation plate, the battery cell, the foam and the heat insulation plate, the heat preservation plate is provided with two, the two heat preservation plates are arranged in parallel and are spaced apart, a plurality of battery cells, a plurality of foams and a plurality of heat insulation plates are stacked between the two heat preservation plates, the foam is used for absorbing the expansion of the battery cell, the heat insulation plate is used for cutting off the adjacent battery cell to prevent the accident from spreading when the battery cell fails, and the heat preservation plate is used for heat preservation of the battery cell stacking module. The heat management between the battery cells can be optimized by skillfully combining the heat preservation plate, the battery cell, the foam and the heat insulation plate, the heat preservation performance of the battery cell stacking module is improved, the battery cell works at an appropriate temperature, and the charging and discharging efficiency and safety are improved. At the same time, reasonable stacking can more effectively utilize the space and increase the energy density of the battery module. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings. Among them:
[0019] Figure 1 is the explosion view of the specific embodiment 1 of the utility model;
[0020] Figure 2 is the explosion view of the specific embodiment 2 of the utility model;
[0021] Figure 3 is the explosion view of the specific embodiment 3 of the utility model.
[0022] Mark explanation: 100, insulation board; 200, electric core; 210, electric core bare surface; 211, first foam; 212, second foam; 213, third foam; 214, fourth foam; 300, first heat insulation plate; 310, second heat insulation plate; 500, aluminum fin; 501, exhaust groove; 510, first aluminum fin electric core combination; 520, second aluminum fin electric core combination; 530, third aluminum fin electric core combination; 540, fourth aluminum fin electric core combination; 550, fifth aluminum fin electric core combination; 560, sixth aluminum fin electric core combination. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.
[0024] Those skilled in the art can understand that, unless specifically stated, the singular form "a", "one", "above" and "the" used herein can also include the plural form. It should be further understood that the phrase "comprising" used in the specification of the present application means that the features, integers, steps, operations, elements, modules, modules and / or components exist, but do not exclude the existence or addition of one or more other features, integers, steps, operations, elements, modules, modules, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there can be intermediate elements. In addition, the "connection" or "coupling" used herein can include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any module and all combinations of the associated listed items.
[0025] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. Specific embodiment 1
[0027] As Figure 1 shown, the application provides a battery cell stacking module, the battery cell stacking module includes thermal insulation plates 100, battery cells 200, foam, thermal insulation plates, two thermal insulation plates 100 are provided, the two thermal insulation plates 100 are arranged in parallel and are spaced apart, a plurality of battery cells 200, a plurality of foams and a plurality of thermal insulation plates are stacked between the two thermal insulation plates 100, the foam is used to absorb the expansion of the battery cell 200, the thermal insulation plate is used to cut off the adjacent battery cell 200 when the battery cell 200 fails to prevent the spread of the accident, and the thermal insulation plate 100 is used to thermally insulate the battery cell stacking module.
[0028] In a specific embodiment, the thermal insulation plate 100 is a plate material with thermal insulation performance, which can be made of polyurethane foam, for example. The thermal insulation plate 100 is rectangular, the two thermal insulation plates 100 are arranged in parallel and are spaced apart, and the two thermal insulation plates 100 are respectively arranged at the two ends of the battery cell stacking module. The thermal insulation plate 100 can reduce the heat exchange between the battery cell stacking module and the external environment, maintain the overall temperature of the battery cell stacking module stable, and provide a suitable temperature environment for the normal operation of the battery cell 200.
[0029] The battery cell 200 is the core energy storage unit of the battery cell stacking module, such as a lithium ion battery cell. The battery cell 200 is rectangular as a whole, and the shape of the thermal insulation plate 100 matches the shape of the battery cell 200. The battery cell 200 generates heat and volume change during charging and discharging. The foam is rectangular, and the shape of the foam matches the shape of the battery cell 200. The foam is a material with elasticity and cushioning performance, such as polyurethane foam. The soft characteristics of the foam can absorb the volume change of the battery cell 200 due to expansion during use, avoiding extrusion and damage to other components. In this embodiment, the thermal insulation plate can be a ceramic fiber material, and the thermal insulation plate has good thermal insulation performance. When one of the battery cells 200 fails due to thermal runaway, the thermal insulation plate can effectively block the heat transfer and prevent the failure from spreading to the adjacent battery cell 200, thereby avoiding a chain safety accident of the entire battery cell stacking module.
[0030] In summary, by reasonably combining the heat preservation plate 100, the battery cell 200, the foam and the heat insulation plate, the functions in multiple aspects are realized. The heat preservation plate 100 maintains the suitable temperature for the working of the battery cell 200, ensures the performance stability of the battery cell 200 and reduces the performance attenuation caused by the temperature fluctuation. The foam absorbs the expansion of the battery cell 200, improves the structural stability and safety of the module and avoids the structural deformation and damage caused by the expansion of the battery cell 200. The heat insulation plate is a key safety protection component and can play an isolation role when the battery cell 200 fails, prevents the spread of the faults such as thermal runaway in the whole module, greatly reduces the safety risk, improves the safety and reliability of the whole battery cell stacking module and prolongs the service life, which provides a guarantee for the stable operation of the whole battery system.
[0031] As shown in Figure 1 The battery cell stacking module further includes a plurality of aluminum fins 500 corresponding to the battery cells 200 one by one. The shape of the aluminum fin 500 matches the shape of the battery cell 200, and the plurality of battery cells 200 and the plurality of aluminum fins 500 are combined together to form a plurality of aluminum fin battery cell combinations.
[0032] In a specific embodiment, the aluminum fin 500 is a component made of aluminum alloy, and the shape thereof is designed according to the shape of the battery cell 200. For example, the battery cell 200 is a cuboid, and the aluminum fin 500 is designed as a U-shaped thin sheet structure that can closely fit the side surface of the battery cell 200. The battery cell 200 and the aluminum fin 500 are combined together to form an aluminum fin battery cell combination, and such a combination helps to improve the heat dissipation performance of the battery cell 200. Since aluminum has good thermal conductivity, the heat generated during the working of the battery cell 200 can be quickly transferred away through the aluminum fin 500 closely fitted with the battery cell 200. Moreover, the close fit of the aluminum fin 500 and the battery cell 200 can enhance the structural stability of the battery cell 200 in the module and avoid displacement or shaking of the battery cell 200 during stacking.
[0033] A plurality of L-shaped exhaust grooves 501 are arranged on the top of the aluminum fin 500, and the exhaust grooves 501 penetrate the aluminum fin 500. When the battery cell 200 appears thermal runaway, the exhaust grooves 501 are used for exhausting the battery cell 200, and the exhaust grooves 501 are uniformly distributed on the aluminum fin 500, so that the gas generated by the battery cell 200 can be quickly and uniformly exhausted.
[0034] In summary, the addition of aluminum fins 500 enhances the heat dissipation capacity of individual cells 200, allowing the heat generated during charging and discharging to dissipate in a timely manner. This prevents overheating from affecting the performance of cells 200 or even causing thermal runaway, ensuring that cells 200 operate within a safe temperature range and improving their efficiency and performance stability. On the other hand, the combined structure of aluminum fins 500 and cells 200 increases the overall strength and stability of cells 200. Under conditions such as vehicle movement and equipment vibration, it can maintain the relatively fixed position of cells 200, enhancing the reliability of the entire cell stack module.
[0035] like Figure 1 As shown, the aluminum finned battery cell assembly includes a battery cell exposed surface 210, which is the large surface of the battery cell 200. The battery cell exposed surfaces 210 of two adjacent aluminum finned battery cell assemblies face opposite directions.
[0036] In one specific embodiment, the exposed cell surface 210 refers to the surface portion of the cell 200 in the aluminum finned cell assembly that is not completely covered by the aluminum fins 500. When assembling the cell stacking module, adjacent aluminum finned cell assemblies are arranged with their exposed cell surfaces 210 facing opposite directions. For example, if the first vertically positioned aluminum finned cell assembly is placed with its exposed cell surface 210 facing backward, then the adjacent second vertically positioned aluminum finned cell assembly is placed with its exposed cell surface 210 facing forward. This design aims to more rationally arrange and utilize the internal space of the module, while balancing the heat dissipation and structural stability of the entire cell stacking module. By opposing the exposed cell surfaces 210, the overall layout of the cell stacking module can be made more rational, avoiding problems such as uneven heat dissipation or weak structural strength caused by excessive exposed cell surfaces 210 accumulating in the same direction.
[0037] like Figure 1 As shown, several foam pads are attached to the exposed surface 210 of the battery cell in the aluminum fin battery cell assembly.
[0038] In one specific embodiment, foam is attached to the exposed surface 210 of the battery cell. When the battery cell 200 expands during charging and discharging, the foam can buffer and absorb the expansion force generated by the exposed surface 210. For example, when the volume of the battery cell 200 increases during charge-discharge cycles, the foam in contact with the exposed surface 210 will be compressed, absorbing the expansion deformation of the battery cell 200 through its own elastic deformation, preventing the battery cell 200 from directly pressing against other components, especially adjacent battery cells 200 or heat insulation plates. At the same time, the foam can also play a role in shock absorption to a certain extent. When the module is subjected to external vibration or impact, the foam can buffer this external force and protect the exposed surface 210 of the battery cell from damage.
[0039] In summary, the arrangement of the foam at the exposed surface 210 of the battery cell 200 effectively solves the problem of battery cell 200 swelling, ensuring that the battery cell 200 does not damage other components when the volume changes, and ensuring the integrity and stability of the internal structure of the battery cell stack module. Secondly, the cushioning and shock-absorbing properties of the foam can reduce the impact of external shocks and impacts on the battery cell 200, allowing the battery cell 200 to work in a more stable environment, reducing the performance degradation or damage of the battery cell 200 caused by physical impact, and improving the durability of the battery cell 200.
[0040] As shown in Figure 1 , the several aluminum fin battery cell combinations include a first aluminum fin battery cell combination 510 and a second aluminum fin battery cell combination 520, the several foams include a first foam 211, the several heat insulation plates include a first heat insulation plate 300, and the first aluminum fin battery cell combination 510, the first foam 211, the second aluminum fin battery cell combination 520, and the first heat insulation plate 300 are sequentially stacked.
[0041] In a specific embodiment, the first aluminum fin battery cell combination 510 and the second aluminum fin battery cell combination 520 are the combination structure of the battery cell 200 and the aluminum fin 500 mentioned above. During assembly, the first aluminum fin battery cell combination 510 is placed first, then the first foam 211 is placed on the side, and then the second aluminum fin battery cell combination 520 is placed on the side of the first foam 211 away from the first aluminum fin battery cell combination 510, and finally the first heat insulation plate 300 is placed on the side of the second aluminum fin battery cell combination 520 away from the first foam 211. The first foam 211 absorbs the swelling of the battery cell 200 in the first aluminum fin battery cell combination 510, and when the battery cell 200 swells, it is compressed to adapt to the change in volume; the first heat insulation plate 300 can effectively block heat and prevent the spread of failure when the battery cell 200 in the second aluminum fin battery cell combination 520 fails.
[0042] In summary, through the above-mentioned orderly stacking mode, a battery cell stack module with a hierarchical structure is formed. The first foam 211 and the first heat insulation plate 300 respectively play the roles of absorbing the swelling of the battery cell 200 and blocking the failure, so that the adjacent first aluminum fin battery cell combination 510 and second aluminum fin battery cell combination 520 can maintain a good structural relationship and work independently of each other, avoiding interference and influence between each other. Specific embodiment 2
[0044] As shown in Figure 2As shown, unlike the specific embodiment 1 above, the plurality of aluminum wing battery cell assemblies also include a third aluminum wing battery cell assembly 530, and the plurality of foams also include a second foam 212. The third aluminum wing battery cell assembly 530 is disposed on the side of the first heat insulation plate 300 away from the second aluminum wing battery cell assembly 520, and the second foam 212 is disposed on the side of the third aluminum wing battery cell assembly 530 away from the first heat insulation plate 300.
[0045] In one specific embodiment, the third aluminum finned cell assembly 530 is a combination unit of another cell 200 and aluminum fins 500. During assembly, the third aluminum finned cell assembly 530 is placed on the side of the first heat insulation plate 300 away from the second aluminum finned cell assembly 520, and then the second foam 212 is placed on the side of the third aluminum finned cell assembly 530 away from the first heat insulation plate 300. The function of the second foam 212 is also to absorb the expansion of the cell 200 in the third aluminum finned cell assembly 530. At the same time, the third aluminum finned cell assembly 530, together with other aluminum finned cell assemblies, constitutes a more complex stacked structure, increasing the energy storage capacity and output capability of the battery stacking module.
[0046] In summary, the addition of the third aluminum finned cell assembly 530 and the second foam 212 further expands the structure and function of the cell stacking module. On the one hand, it increases the energy storage capacity of the cell stacking module, meeting higher energy demands; on the other hand, the presence of the second foam 212 ensures that the expansion of the cells 200 in the third aluminum finned cell assembly 530 will not affect the structure of the entire cell stacking module, improving the safety of the cell stacking module in the case of multiple cells 200 stacked. Specific Implementation Example 3
[0048] like Figure 3 As shown, unlike the specific embodiment 1 above, the plurality of aluminum wing battery cell assemblies include a fourth aluminum wing battery cell assembly 540, a fifth aluminum wing battery cell assembly 550 and a sixth aluminum wing battery cell assembly 660, which are stacked sequentially.
[0049] In a specific embodiment, the fourth aluminum fin cell combination 540, the fifth aluminum fin cell combination 550 and the sixth aluminum fin cell combination 660 are all structures with the same principle as the aluminum fin cell combination described in specific embodiment 1, the third foam 213 can be a foam with fireproof performance, for example, adding a flame retardant therein, the fourth foam 214 can be a foam with good pressure resistance, and the second heat insulation plate 310 can be a ceramic heat insulation plate with heat insulation performance. In assembly, the fourth aluminum fin cell combination 540 is placed first, then the fifth aluminum fin cell combination 550 is placed at the side of the fourth aluminum fin cell combination 540, the third foam 213 is placed at the side of the fifth aluminum fin cell combination 550 away from the fourth aluminum fin cell combination 540, the second heat insulation plate 310 is placed at the side of the third foam 213 away from the fifth aluminum fin cell combination 550, the fourth foam 214 is placed at the side of the second heat insulation plate 310 away from the third foam 213, and the sixth aluminum fin cell combination 660 is placed at the side of the fourth foam 214 away from the second heat insulation plate 310. The third foam 213 can play a role in buffering and absorbing the expansion force when the cells 200 of the fifth aluminum fin cell combination 550 expand, the second heat insulation plate 310 can prevent the failure of the fifth aluminum fin cell combination 550 and the sixth aluminum fin cell combination 660 from spreading to other positions, and the fourth foam 214 provides expansion buffering for the cells 200 of the sixth aluminum fin cell combination 660.
[0050] In summary, by introducing multiple aluminum fin cell combinations and foams with different performances and stacking them in a specific order, a more complex and multifunctional cell stacking module is constructed. This design can meet higher energy density and different safety requirement application scenarios, and the use of foams with different performances enhances the response capability of the cell stacking module to various complex situations, improving the stability and reliability of the entire cell stacking module.
[0051] In order to achieve the purpose of the present application, in an embodiment, the present application further provides a battery module, which comprises the cell stacking module of any one of the above embodiments. In this embodiment, the specific structure of the battery module is not limited, as long as the battery module comprises the above-mentioned cell stacking module.
[0052] In order to achieve the purpose of the present application, in an embodiment, the present application further provides a battery module, which comprises the cell stacking module of any one of the above embodiments. In this embodiment, the specific structure of the battery module is not limited, as long as the battery module comprises the above-mentioned cell stacking module.
[0053] The above is only a preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. An electric cell stack module, characterized by, include: Insulation board, battery cell, foam, heat insulation board; The insulation board is provided in two parallel and spaced apart. Several battery cells, several foams and several heat insulation boards are stacked between the two insulation boards. The foam is used to absorb the expansion of the battery cell, the heat insulation plate is used to separate two adjacent battery cells, and the heat insulation plate is used to keep the battery cell stack module warm.
2. The electric cell stack module of claim 1, wherein, The cell stacking module also includes several aluminum wings that correspond one-to-one with the cells. The shape of the aluminum wings matches the shape of the cells. The cells and the aluminum wings are combined together to form several aluminum wing cell combinations.
3. The electric cell stack module of claim 2, wherein, The aluminum finned battery cell assembly includes exposed cell surfaces, with the exposed cell surfaces of two adjacent aluminum finned battery cell assemblies facing opposite directions.
4. The electric cell stack module of claim 3, wherein, The plurality of foams are attached to the exposed surface of the battery cell in the aluminum fin battery cell assembly.
5. The electric cell stack module of claim 3, wherein, The plurality of aluminum wing battery cell assemblies include a first aluminum wing battery cell assembly and a second aluminum wing battery cell assembly; the plurality of foams include a first foam; and the plurality of heat insulation boards include a first heat insulation board. The first aluminum wing battery cell assembly, the first foam, the second aluminum wing battery cell assembly, and the first heat insulation board are stacked sequentially.
6. The electric cell stack module of claim 5, wherein, The plurality of aluminum finned battery cell assemblies also include a third aluminum finned battery cell assembly, and the plurality of foams also include a second foam. The third aluminum finned battery cell assembly is disposed on the side of the first heat insulation plate away from the second aluminum finned battery cell assembly, and the second foam is disposed on the side of the third aluminum finned battery cell assembly away from the first heat insulation plate.
7. The electric cell stack module of claim 3, wherein, The plurality of aluminum wing battery cell assemblies also include a fourth aluminum wing battery cell assembly, a fifth aluminum wing battery cell assembly, and a sixth aluminum wing battery cell assembly, which are stacked sequentially.
8. The electric cell stack module of claim 2, wherein, The aluminum wing has several evenly distributed exhaust grooves that extend through the aluminum wing and are used to exhaust air from the battery cell.
9. A battery module, characterized by Includes the cell stacking module as described in any one of claims 1 to 8.
10. A battery pack, characterized by, Includes the battery module as described in claim 9.