Battery module and battery pack
By using independent first and second glue blocks in the battery module, the problem of difficult to satisfy the expansion amount and structural strength of the absorbent air bag in the battery module is solved, and higher product quality and structural stability are achieved.
Patent Information
- Application Number
- CN202422065690.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-23
AI Technical Summary
The glue filling in existing battery modules is difficult to meet the requirements of absorbing the expansion amount and structural strength of the air bag of the battery absorbing the battery cell.
Two independent rubber blocks are used: the first rubber block is located on the side of the pole ear of the battery cell, wrapping the air bag to absorb the expansion; the second rubber block is located in the shell and connected to the shell to provide structural strength. The hardness of both can be selected according to the demand to meet the dual needs of absorbing expansion and providing strength.
The first rubber block absorbs the expansion amount of the air bag, and the second rubber block ensures the end strength of the battery module, improving the product quality of the battery module and the battery pack.
Smart Images
Figure CN223039030U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of power batteries, and particularly relates to a battery module and a battery pack. Background Art
[0002] In order to reduce costs, existing battery packs generally adopt a method of pouring glue at both ends of the battery module. Therefore, the glue at the ends of the battery module needs to have a certain strength to prevent deformation. When the soft-pack battery cells inside the battery module work, the air bags of the battery cells will expand. Although the glue at the ends of the battery module can meet the strength requirements, there is a problem that it is difficult to absorb the expansion amount of the air bags of the battery cells. Therefore, it has become an urgent technical problem that the glue pouring in the battery module needs to simultaneously meet the requirements of absorbing the expansion amount of the air bags of the battery cells and structural strength. Summary of the Utility Model
[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a battery module and a battery pack, which are used to solve the problem that it is difficult for the glue pouring in the existing battery module to simultaneously meet the requirements of absorbing the expansion amount of the air bags of the battery cells and structural strength, so as to improve the product quality.
[0004] To achieve the above purpose and other related purposes, the present utility model provides a battery module, including:
[0005] A housing;
[0006] A plurality of battery cells, the plurality of battery cells are stacked and arranged in the housing, the battery cells have air bags and tabs, and at least part of the tabs extends out of the air bags;
[0007] A first glue block, which is located in the housing and distributed on the tab side of the battery cells, and the first glue block wraps at least a part of the air bags;
[0008] A second glue block, the second glue block is located on the side of the first glue block facing away from the tabs of the battery cells and is connected to the housing.
[0009] Optionally, the housing has an opening corresponding to the tab side of the battery cells, the second glue block is filled in the opening to block the opening, and the outer side wall of the second glue block forms a part of the outer side wall of the battery module.
[0010] Optionally, the hardness of the first glue block is less than the hardness of the second glue block.
[0011] Optionally, the Shore C hardness of the first glue block is C1, 30 < C1 < 50; the Shore C hardness of the second glue block is C2, C2 ≥ 50.
[0012] Optionally, the battery module further includes an isolation device located between the first rubber block and the second rubber block to separate the first rubber block from the second rubber block.
[0013] Optionally, the isolation device includes a sampling component and two partition plates, and the sampling component is clamped between the two partition plates.
[0014] Optionally, the isolation device is installed on the housing.
[0015] Optionally, the housing includes a side plate, and the isolation device is installed on the side plate and elastically connected to the side plate.
[0016] Optionally, the side plate is provided with an elastic clamping member having a clamping gap that can be elastically adjusted in the thickness direction of the second rubber block, and the elastic clamping member clamps the part of the isolation device extending into the clamping gap.
[0017] Optionally, the elastic clamping member includes two oppositely arranged elastic clamping parts, and the clamping gap is defined between the two elastic clamping parts.
[0018] Optionally, the first rubber block includes a first foaming rubber; the second rubber block includes a second foaming rubber.
[0019] Optionally, the first rubber block wraps at least a part of the tab; alternatively, the first rubber block and the second rubber block wrap at least a part of the tab.
[0020] Optionally, the battery module further includes a sampling component, and the first rubber block wraps at least a part of the sampling component; alternatively, the second rubber block wraps at least a part of the sampling component.
[0021] To achieve the above and other related purposes, the present application further provides a battery pack including the battery module as described above.
[0022] As described above, the battery module and the battery pack of the present utility model have at least the following beneficial effects: The first rubber block and the second rubber block are independent of each other. The first rubber block and the second rubber block can select appropriate hardness according to requirements. The first rubber block absorbs the expansion amount of the compensation air bag, and the second rubber block ensures the end strength of the battery module, which is beneficial to improving the product quality of the battery module and the battery pack. Description of the Drawings
[0023] Figure 1 It is a schematic structural diagram of an embodiment of the battery module of the present utility model;
[0024] Figure 2 is Figure 1 a partial structural schematic diagram of the battery module in
[0025] Figure 3 is Figure 1 the explosion schematic diagram of the battery module in
[0026] Figure 4 is Figure 1 the side view of the battery module in
[0027] Figure 5 is Figure 4 the partial sectional view at A-A in
[0028] Figure 6 is Figure 4 the sectional view at B-B in
[0029] Figure 7 is Figure 6 the enlarged schematic diagram of the partial area D in
[0030] Figure 8 is Figure 2 the explosion schematic diagram of the isolation device in
[0031] Figure 9 is Figure 2 the partial explosion schematic diagram of the elastic clamping member and the side plate in
[0032] Part number description
[0033] Housing 1, upper cover 11, side plate 12, mounting groove 121, bottom plate 13, battery cell 2, tab 21, airbag 22, second adhesive block 3, isolation device 4, partition 41, sampling assembly 42, elastic clamping member 5, elastic clamping part 51, clamping gap 52, seat body 53; first adhesive block 6. Specific embodiments
[0034] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.
[0035] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present utility model can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope in which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present utility model can be implemented.
[0036] See Figures 1 to 3 , in some alternative embodiments, the present application provides a battery pack, and the battery pack includes a battery module.
[0037] See Figures 1 to 3 , in some alternative embodiments, the battery module provided by the present application includes a housing 1, a plurality of battery cells 2, a first rubber block 6, and a second rubber block 3; in addition to the above components, the battery module may further include an isolation device 4. The plurality of battery cells 2 are stacked and arranged in the housing 1. The battery cell 2 has an air bag 22 and a tab 21, and at least a part of the tab 21 extends out of the air bag 22; the battery cell 2 further includes a battery cell main body, a part of the tab 21 is located inside the air bag 22 and is electrically connected to the battery cell main body, and the other part of the tab 21 extends out of the air bag 22 to realize the external output of the electric energy of the battery cell. The first rubber block 6 is located inside the housing 1 and is distributed on the tab side of the battery cell 2, and the first rubber block 6 wraps at least a part of the air bag 22. The first rubber block 6 wrapping at least a part of the air bag 22 can absorb and compensate for the expansion amount of the air bag 22; wherein, the tab side of the battery cell 2 is the side where the battery cell 2 has the tab 21. The second rubber block 3 is located on the side of the first rubber block 6 opposite to the tab side of the battery cell 2, that is, the second rubber block 3 is located on the relatively outer side of the first rubber block 6. The second rubber block 3 is connected to the housing 1, and the second rubber block 3 is independent of the first rubber block 6, so that the second rubber block 3 can select a suitable hardness to have a certain anti-deformation ability, which is beneficial to improving the overall structural strength and playing a protective role for the battery cell 2.
[0038] Optionally, the first rubber block 6 wraps the part of the air bag 22 close to the tab 21. Since the part of the air bag 22 close to the tab 21 is prone to expansion during the use of the battery cell 2, the first rubber block 6 wrapping the part of the air bag 22 close to the tab 21 is beneficial to fully compensating for the expansion of the air bag 22 and is beneficial to improving the stability of the overall structure.
[0039] Optionally, the housing 1 has an opening corresponding to the tab side of the battery cell 2. The second rubber block 3 is filled at the opening to block the opening, and the outer sidewall of the second rubber block 3 forms a part of the outer sidewall of the battery module. That is, there is no other structure outside the second rubber block 3 to shield the second rubber block 3, so that the second rubber block 3 can serve as the function and role of the end plate of the traditional battery module. Among them, the housing 1 includes an upper cover 11, a bottom plate 13 and two side plates 12. The two side plates 12 are arranged oppositely. The bottom plate 13 and the side plates 12 are connected and cooperate with the upper cover 11 to construct a housing 1 with openings at both ends; specifically, the bottom plate 13 is located between the two side plates 12, and both ends of the bottom plate 13 are respectively connected to the two side plates 12 to form a U-shaped structure with the opening facing the upper cover 11. This structural design blocks the opening through the second rubber block 3. The second rubber block 3 replaces the end plate covering the opening, and there is no need to separately set an end plate additionally, which is beneficial to simplifying the structure and reducing the weight. The first rubber block 6 and the second rubber block 3 are separately arranged so that the second rubber block 3 can select a suitable hardness according to requirements to prevent deformation, thereby improving the end strength of the battery module, and further being beneficial to ensuring the strength of the overall structure. The first rubber block 6 selects a suitable hardness according to requirements to have a certain elastic deformation ability to provide a deformation space for the expansion and deformation of the airbag 22.
[0040] Optionally, the first rubber block 6 includes a first foaming rubber, and the first foaming rubber can be filled on the tab side of the battery cell 2 and solidified. The filling is simple, convenient, fast, and has good heat insulation, insulation and flame retardant effects.
[0041] Optionally, the second rubber block 3 includes a second foaming rubber, and the second foaming rubber can be filled at the opening of the housing 1 and solidified. The filling is simple, convenient, fast, and has good heat insulation, insulation and flame retardant effects.
[0042] During specific setting, the first tooling can be inserted into the opening to a certain depth, and then the second foaming rubber is poured into the housing 1 through the glue injection hole on the housing 1. When the second foaming rubber is foamed and formed into a stable rubber block structure, the first tooling is removed. Then, the second tooling is used to block the opening, and then the second foaming rubber is poured between the second rubber block 3 and the second tooling. When the second foaming rubber is foamed and formed into a stable rubber block structure and blocks the opening, the second tooling is removed, thus completing the setting of the second rubber block 3.
[0043] Optionally, the hardness of the first rubber block 6 is less than that of the second rubber block 3. Further, the Shore C hardness of the first rubber block 6 is C1, 30 < C1 < 50; the Shore C hardness of the second rubber block 3 is C2, C2 ≥ 50. Specifically, C1 can be any value among 31, 35, 40, 43, 49, etc.; C2 can be any value among 50, 51, 56, 60, 70, etc.
[0044] For the battery module of the above embodiments, the first rubber block 6 and the second rubber block 3 are separately provided, and appropriate hardness can be selected according to requirements. The first rubber block 6 plays a role in protecting the tab side of the battery cell 2 and absorbing the expansion of the airbag 22, while the second rubber block 3 plays a role in enhancing the overall structural strength. Specifically, the first rubber block 6 can be a rubber block with a relatively small hardness and has a certain elastic deformation ability. The first rubber block 6 is located on the tab side of the battery cell 2 and can wrap at least a part of the airbag 22. The first rubber block 6 covers the airbag 22, which can provide an elastic deformation space for the expansion of the airbag 22 and absorb the expansion amount of the airbag 22. The second rubber block 3 can be a rubber block with a relatively large hardness and has a certain anti-deformation ability. It is connected to the housing 1 to improve the overall structural strength of the battery module.
[0045] Optionally, the first rubber block 6 wraps at least a part of the tab 21; or, the first rubber block 6 and the second rubber block 3 wrap at least a part of the tab 21. The first rubber block 6 or the first rubber block 6 and the second rubber block 3 wrapping the tab 21 can protect the tab side of the battery cell 2. On the one hand, it can prevent the tab side of the battery cell 2 from colliding and deforming, and on the other hand, it can reduce the risk of thermal propagation during thermal runaway.
[0046] See Figures 1 to 7 and Figure 9 In some alternative embodiments, the battery module further includes a sampling component 42. The first rubber block 6 wraps at least a part of the sampling component 42; or, the second rubber block 3 wraps at least a part of the sampling component 42.
[0047] See Figure 2 、 Figure 3 、 Figure 7 and Figure 8 In some alternative embodiments, the isolation device 4 is located between the first rubber block 6 and the second rubber block 3 and separates the first rubber block 6 from the second rubber block 3 to facilitate the independent setting of the first rubber block 6 and the second rubber block 3. When specifically setting, a tooling can be used to block the opening, and then the first foaming glue and the second foaming glue are respectively poured into both sides of the isolation device 4 in the housing 1 from the glue injection holes on the housing 1. When the first foaming glue and the second foaming glue are both foamed and form a stable rubber block structure, the tooling is removed, thereby completing the setting of the first rubber block 6 and the second rubber block 3.
[0048] Furthermore, the isolation device 4 includes a sampling component 42 and two partition plates 41. The sampling component 42 is clamped between the two partition plates 41 to replace the traditional bracket and ensure the stable setting of the sampling component 42.
[0049] Optionally, the sampling component 42 includes a flexible circuit board and a sampling nickel sheet. The flexible circuit board is electrically connected to the tab 21 of the battery cell 2 through the sampling nickel sheet. The partition plate 41 is provided with an opening corresponding to the sampling nickel sheet to facilitate the electrical connection between the sampling nickel sheet and the tab 21 of the battery cell 2.
[0050] Optionally, two partition plates 41 in the same isolation device 4 can be stacked and adhesively fixed. The two partition plates 41 in the same isolation device 4 wrap at least a part of the flexible circuit board. The two ends of the partition plate 41 are elastically clamped in the elastic clamping members 5 on the corresponding side plates 12 respectively.
[0051] In the battery module of the above embodiment, the sampling component 42 is clamped between the two partition plates 41 to fix the sampling component 42, so that the partition plate 41 can not only isolate the first adhesive block 6 from the second adhesive block 3, but also position and fix the sampling component 42, with a simple structure and convenient assembly.
[0052] Optionally, the partition plate 41 is installed on the housing 1. Further referring to Figure 6 、 Figure 7 and Figure 9 , the partition plate 41 is installed on the side plate 12 and elastically connected to the side plate 12. Wherein, an elastic clamping member 5 is provided on the side plate 12. The elastic clamping member 5 has a clamping gap 52 that can be elastically adjusted along the thickness direction of the second adhesive block 3. The elastic clamping member 5 clamps the part of the partition plate 41 extending into the clamping gap 52. Specifically, the elastic clamping member 5 includes two oppositely arranged elastic clamping parts 51, and a clamping gap 52 is defined between the two elastic clamping parts 51.
[0053] Optionally, an installation groove 121 is provided on the side plate 12, and the elastic clamping member 5 is installed in the installation groove 121; wherein, the elastic clamping member 5 further includes a seat body 53. The seat body 53 cooperates with the installation groove 121 to realize the positioning installation of the elastic clamping member 5. The elastic clamping part 51 is arranged on the seat body 53 and can elastically deform to move closer to each other to reduce the clamping gap 52 and elastically deform to move away from each other to increase the clamping gap 52.
[0054] In the battery module of the above embodiment, the first adhesive block 6 and the second adhesive block 3 are separated by the isolation device 4, and the first adhesive block 6 and the second adhesive block 3 do not interfere with each other. The first adhesive block 6 and the second adhesive block 3 can be filled synchronously, which is simple, convenient, and low-cost in production and manufacturing. For example, the first adhesive block 6 is filled and installed in the first area, the second adhesive block 3 is filled and installed in the second area. The upper cover 11 is provided with a first filling hole corresponding to the first area and a second filling hole corresponding to the second area. Glues with different hardnesses are filled into the first area and the second area from the corresponding filling holes respectively. In addition, the isolation device 4 is elastically clamped with the housing 1, so that the isolation device 4 can float and adjust within a certain range during the assembly process, and further the sampling nickel sheet can move within a certain range, which is beneficial to avoiding the sampling nickel sheet being pulled when moving during the assembly process of the isolation device 4 and is beneficial to improving the product quality.
[0055] The battery module and battery pack of the present utility model cooperate with the mutually independent first rubber block 6 and second rubber block 3, which can not only absorb the expansion of the air bag 22 of the battery cell 2, but also ensure the strength and reliability of the overall structure of the battery module and battery pack, which is beneficial to improving the product quality of the battery module and battery pack and reducing costs.
[0056] In the description of this specification, the descriptions referring to terms such as "this embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0057] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.
Claims
1. A battery module, characterized in that: include: case; A plurality of battery cells, wherein the plurality of battery cells are stacked and arranged in the housing, the battery cells having an air bag and a pole ear, and at least a portion of the pole ear extends out of the air bag; A first rubber block is located in the housing and distributed on the lug side of the battery cell, and the first rubber block wraps at least a portion of the air bag; The second rubber block is located on a side of the first rubber block that faces away from the tab side of the battery cell and is connected to the shell.
2. The battery module according to claim 1, characterized in that: The shell has an opening corresponding to the tab side of the battery cell, the second rubber block is filled in the opening to seal the opening, and the outer side wall of the second rubber block forms a part of the outer side wall of the battery module.
3. The battery module according to claim 1, characterized in that: The hardness of the first rubber block is smaller than the hardness of the second rubber block.
4. The battery module according to claim 3, characterized in that: The Shore C hardness of the first rubber block is C1, 30<C1<50; the Shore C hardness of the second rubber block is C2, C2≥50.
5. The battery module according to claim 1, characterized in that: The battery module further includes an isolation device, which is located between the first rubber block and the second rubber block and separates the first rubber block from the second rubber block.
6. The battery module according to claim 5, characterized in that: The isolation device comprises a sampling component and two partitions, and the sampling component is sandwiched between the two partitions.
7. The battery module according to claim 5 or 6, characterized in that: The isolation device is mounted on the shell.
8. The battery module according to claim 7, characterized in that: The shell includes a side plate, and the isolation device is installed on the side plate and elastically connected to the side plate.
9. The battery module according to claim 8, characterized in that: The side plate is provided with an elastic clamping piece, the elastic clamping piece has a clamping gap that can be elastically adjusted along the thickness direction of the second rubber block, and the elastic clamping piece clamps the portion of the isolation device extending into the clamping gap.
10. The battery module according to claim 9, characterized in that: The elastic clamping member comprises two elastic clamping parts which are arranged opposite to each other, and the clamping gap is defined between the two elastic clamping parts.
11. The battery module according to claim 1, characterized in that: The first glue block includes a first foam glue; the second glue block includes a second foam glue.
12. The battery module according to claim 1, characterized in that: The first rubber block wraps at least a portion of the pole lug; or the first rubber block and the second rubber block wrap at least a portion of the pole lug.
13. The battery module according to claim 1, characterized in that: The battery module further includes a sampling component, and the first rubber block wraps at least a portion of the sampling component; or the second rubber block wraps at least a portion of the sampling component.
14. A battery pack, characterized in that: Comprising a battery module as claimed in any one of claims 1 to 13.