Battery and electric device

Abstract

The present application provides a battery and an electric device. The battery comprises a first battery cell module, a second battery cell module, and a cooling assembly. The first battery cell module comprises a plurality of first battery cells, the second battery cell module comprises a plurality of second battery cells, and the second battery cell module is disposed opposite to the first battery cell module. The cooling assembly is located between the first battery cell module and the second battery cell module, the cooling assembly comprises a heat conducting member, and a first cold plate and a second cold plate that are disposed opposite to each other, the heat conducting member is connected to the first cold plate and the second cold plate, the first cold plate abuts against the first battery cell module, and the second cold plate abuts against the second battery cell module.

Description

Battery and electric device

[0001] The present application claims priority to the Chinese patent application No. 202422751450.6, filed on November 11, 2024, with the Chinese Patent Office; the whole content of the above application is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery, in particular to a battery and an electric device. BACKGROUND

[0003] The battery core is a core component of the battery, which is widely used in energy storage systems, transportation tools and consumer electronics. SUMMARY

[0004] In the related art, there is a large temperature difference between the upper battery core module and the lower battery core module of the battery.

[0005] In a first aspect, the present application provides a battery, comprising:

[0006] A first battery core module comprising a plurality of first battery cores;

[0007] A second battery core module comprising a plurality of second battery cores, the second battery core module being oppositely arranged relative to the first battery core module;

[0008] A cooling assembly located between the first battery core module and the second battery core module, the cooling assembly comprising a heat-conducting member and oppositely arranged first and second cold plates, the heat-conducting member connecting the first and second cold plates, the first cold plate abutting against the first battery core module, and the second cold plate abutting against the second battery core module.

[0009] In a second aspect, the present application provides an electric device comprising the above-mentioned battery. ADVANTAGEOUS EFFECTS

[0010] The battery provided by the present application sets the cooling assembly between the first battery core module and the second battery core module, the first cold plate of the cooling assembly can cool and dissipate heat for the first battery core module, the second cold plate of the cooling assembly can cool and dissipate heat for the second battery core module, thereby achieving cooling and heat dissipation for the first battery core module and the second battery core module at the same time, the first battery core module and the second battery core module share one cooling assembly, which simplifies the structure of the battery. The heat-conducting member can conduct heat between the first and second cold plates, and the first and second cold plates can exchange heat through the heat-conducting member, which is conducive to uniform temperature between the first and second battery core modules, reduces the temperature difference between the first and second battery core modules, improves the temperature uniformity of the battery, and is conducive to improving the cycle life of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic diagram of the battery structure provided in an embodiment of this application;

[0012] Figure 2 is an exploded view of the battery structure provided in an embodiment of this application;

[0013] Figure 3 is one of the exploded structural diagrams of the cooling assembly provided in the embodiments of this application;

[0014] Figure 4 is a second exploded view of the cooling assembly provided in an embodiment of this application;

[0015] Figure 5 is one of the partial structural schematic diagrams of the battery provided in the embodiments of this application;

[0016] Figure 6 is a second schematic diagram of a partial structure of a battery provided in an embodiment of this application. Embodiments of the present invention

[0017] An embodiment of this application discloses a battery, as shown in Figures 1, 2, 3, and 4. The battery includes a first cell module 1, a second cell module 2, and a cooling assembly 3. The first cell module 1 includes a plurality of first cells, and the second cell module 2 includes a plurality of second cells. The second cell module 2 is disposed opposite to the first cell module 1. The cooling assembly 3 is located between the first cell module 1 and the second cell module 2. The cooling assembly 3 includes a heat-conducting element 31 and a first cold plate 34 and a second cold plate 35 disposed opposite to each other. The heat-conducting element 31 connects the first cold plate 34 and the second cold plate 35. The first cold plate 34 abuts against the first cell module 1, and the second cold plate 35 abuts against the second cell module 2.

[0018] According to the battery embodiment of this application, a cooling assembly 3 is disposed between the first cell module 1 and the second cell module 2. The first cold plate 34 of the cooling assembly 3 can cool and dissipate heat from the first cell module 1, and the second cold plate 35 of the cooling assembly 3 can cool and dissipate heat from the second cell module 2, achieving simultaneous cooling and dissipation of the first cell module 1 and the second cell module 2. The first cell module 1 and the second cell module 2 share a single cooling assembly 3, simplifying the battery structure. The heat-conducting component 31 can conduct heat between the first cold plate 34 and the second cold plate 35. Heat exchange between the first cold plate 34 and the second cold plate 35 is facilitated by the heat-conducting component 31, which helps to uniformly distribute the temperature between the first cell module 1 and the second cell module 2, reduce the temperature difference between the first cell module 1 and the second cell module 2, improve the temperature uniformity of the battery, and thus improve the cycle life of the battery.

[0019] It is understandable that both the first cold plate 34 and the second cold plate 35 can cool and dissipate heat from the first cell module 1. At the same time, both the first cold plate 34 and the second cold plate 35 can cool and dissipate heat from the second cell module 2, thereby reducing the temperature difference between the first cell module 1 and the second cell module 2, improving the temperature uniformity of the battery, and helping to improve the cycle life of the battery.

[0020] For example, the cooling component 3 can be a single piece or assembled from different parts.

[0021] In some examples, the thermally conductive element 31 is, for example, a thermally conductive structural adhesive or a thermally conductive pad.

[0022] In some examples, the heat-conducting element 31 is located between the first cold plate 34 and the second cold plate 35 to connect the first cold plate 34 and the second cold plate 35. The heat-conducting element 31 may also be located on one side of the first cold plate 34 and the second cold plate 35, for example, on the side wall of the first cold plate 34, and the heat-conducting element 31 connects the side walls of the first cold plate 34 and the second cold plate 35.

[0023] In some embodiments, the heat-conducting element 31 is located between the first cold plate 34 and the second cold plate 35, wherein the orthographic projection of the first cold plate 34 onto the first cell module 1 coincides with the orthographic projection of the heat-conducting element 31 onto the first cell module 1.

[0024] It is understandable that the projection of the first cold plate 34 onto the first cell module 1 coincides with the projection of the heat-conducting component 31 onto the first cell module 1. In other words, the end face of the first cold plate 34 and the end of the first cell module 1 facing the first cold plate 34 coincides, ensuring the contact area between the first cold plate 34 and the first cell module 1, so that the first cold plate 34 can effectively cool and dissipate heat for the first cell module 1.

[0025] In some embodiments, the heat-conducting element 31 is located between the first cold plate 34 and the second cold plate 35, wherein the orthographic projection of the second cold plate 35 onto the second cell module 2 coincides with the orthographic projection of the heat-conducting element 31 onto the second cell module 2.

[0026] It is understandable that the projection of the second cold plate 35 onto the second cell module 2 coincides with the projection of the heat-conducting component 31 onto the second cell module 2. In other words, the end face of the second cold plate 35 and the end of the second cell module 2 facing the second cold plate 35 coincides, ensuring the contact area between the second cold plate 35 and the second cell module 2, so that the second cold plate 35 can effectively cool and dissipate heat for the second cell module 2.

[0027] In some embodiments, as shown in FIG3, the first cold plate 34 is formed with at least two first flow channel groups 341, and a first receiving space 342 is provided between two adjacent first flow channel groups 341, and a portion of the heat-conducting component 31 is located in the first receiving space 342.

[0028] It is understandable that at least two first flow channel groups 341 are connected in sequence, and a portion of the heat-conducting component 31 is disposed in the first accommodating space 342 between two adjacent first flow channel groups 341. This allows the heat-conducting component 31 to improve the temperature uniformity between the two adjacent first flow channel groups 341, enabling the first cold plate 34 to uniformly dissipate heat from the first cell module 1. Simultaneously, since the heat-conducting component 31 connects the first cold plate 34 and the second cold plate 35, it allows each first flow channel group 341 to exchange heat with the second cold plate 35, improving the temperature uniformity between the first cold plate 34 and the second cold plate 35. This, in turn, reduces the temperature difference between the first cell module 1 and the second cell module 2, improving the battery's temperature uniformity and thus contributing to a longer battery cycle life.

[0029] In some embodiments, as shown in FIG3, the first flow channel group 341 includes at least two first cooling flow channels 3411, and a portion of the heat-conducting element 31 is located between two adjacent first cooling flow channels 3411.

[0030] It is understandable that at least two first cooling channels 3411 are connected in sequence, and a portion of the heat-conducting component 31 is disposed between two adjacent first cooling channels 3411. This allows the heat-conducting component 31 to improve the temperature uniformity between the two adjacent first cooling channels 3411, enabling the first cold plate 34 to uniformly dissipate heat from the first cell module 1. Simultaneously, since the heat-conducting component 31 connects the first cold plate 34 and the second cold plate 35, it allows each first cooling channel 3411 to exchange heat with the second cold plate 35, improving the temperature uniformity between the first cold plate 34 and the second cold plate 35. This, in turn, reduces the temperature difference between the first cell module 1 and the second cell module 2, improves the battery's temperature uniformity, and is beneficial for increasing the battery's cycle life.

[0031] In some embodiments, as shown in FIG4, the second cold plate 35 is formed with at least two second flow channel groups 351, wherein a second receiving space 352 is provided between two adjacent second flow channel groups 351, and a portion of the heat-conducting element 31 is located in the second receiving space 352.

[0032] It is understood that at least two second flow channel groups 351 are connected in sequence, and a portion of the heat-conducting element 31 is disposed in the second accommodating space 352 between two adjacent second flow channel groups 351. This allows the heat-conducting element 31 to improve the temperature uniformity between the two adjacent second flow channel groups 351, enabling the second cold plate 35 to uniformly dissipate heat to the second cell module 2. Simultaneously, since the heat-conducting element 31 connects the first cold plate 34 and the second cold plate 35, it allows each second flow channel group 351 to exchange heat with the first cold plate 34, improving the temperature uniformity between the first cold plate 34 and the second cold plate 35. This, in turn, reduces the temperature difference between the first cell module 1 and the second cell module 2, improving the battery's temperature uniformity and thus contributing to a longer battery cycle life.

[0033] In some embodiments, as shown in FIG4, the second flow channel group 351 includes at least two second cooling flow channels 3511, and a portion of the heat-conducting element 31 is located between two adjacent second cooling flow channels 3511.

[0034] It is understandable that at least two second cooling channels 3511 are connected in sequence, and a portion of the heat-conducting component 31 is disposed between two adjacent second cooling channels 3511. This allows the heat-conducting component 31 to improve the temperature uniformity between the two adjacent second cooling channels 3511, enabling the second cold plate 35 to uniformly dissipate heat from the second cell module 2. Simultaneously, since the heat-conducting component 31 connects the first cold plate 34 and the second cold plate 35, it allows each second cooling channel 3511 to exchange heat with the first cold plate 34, improving the temperature uniformity between the first cold plate 34 and the second cold plate 35. This, in turn, reduces the temperature difference between the first cell module 1 and the second cell module 2, improves the battery's temperature uniformity, and is beneficial for increasing the battery's cycle life.

[0035] In some embodiments, at least two first flow channel groups 341 and at least two second flow channel groups 351 are staggered. This can effectively improve the cooling uniformity of the cooling assembly 3, enabling the cooling assembly 3 to dissipate heat evenly to the first battery cell module 1 and the second battery cell module 2, thereby reducing the temperature difference between the first battery cell module 1 and the second battery cell module 2.

[0036] In some embodiments, the battery further includes a first thermally conductive layer 4, which is disposed between the first cell module 1 and the cooling assembly 3, and connects the first cell module 1 and the first cold plate 34.

[0037] It is understandable that the first thermal conductive layer 4 can improve the heat transfer efficiency between the first battery cell module 1 and the cooling component 3, so that the cooling component 3 can effectively cool and dissipate heat from the first battery cell module 1.

[0038] For example, the first thermally conductive layer 4 is, for instance, a thermally conductive structural adhesive or a thermally conductive pad.

[0039] In some embodiments, the battery further includes a second thermally conductive layer disposed between the second cell module 2 and the cooling assembly 3, and the second thermally conductive layer connects the second cell module 2 and the second cold plate 35.

[0040] Understandably, the second thermal conductive layer can improve the heat transfer efficiency between the second battery cell module 2 and the cooling component 3, so that the cooling component 3 can effectively cool and dissipate heat from the second battery cell module 2.

[0041] For example, the second thermally conductive layer is, for instance, a thermally conductive structural adhesive or a thermally conductive pad.

[0042] In some embodiments, as shown in Figures 1, 2, 5 and 6, the battery further includes a first housing 5 and a second housing 6. The first housing 5 has a first mounting cavity 51, and the first cell module 1 is mounted in the first mounting cavity 51. The second housing 6 has a second mounting cavity 61, and the second cell module 2 is mounted in the second mounting cavity 61.

[0043] In some examples, as shown in Figure 6, at least one inner wall surface of the first housing 5 has a third cooling channel formed therein. It is understood that the inner wall surface with the cooling channel contacts the first battery cell module 1, allowing the inner wall surface to cool and dissipate heat from the first battery cell module 1. That is, at least both ends of the first battery cell module 1 have cooling structures, so that the first battery cell module 1 is simultaneously subjected to heat dissipation from the first cold plate 34 and the inner wall surface of the first housing 5. This achieves multi-end heat dissipation for the first battery cell module 1, improves the temperature uniformity of the first battery cell module 1, reduces the temperature difference between different ends of the first battery cell module 1, and helps to increase the cycle life of the first battery cell module 1.

[0044] Meanwhile, instead of adding cooling components to the first housing 5, a third cooling channel is formed directly on the inner wall surface of the first housing 5, thus reusing the inner wall surface of the first housing 5 and simplifying its structure. For example, a cold plate can be used as the side wall or bottom wall of the first housing 5, and the cold plate has a third cooling channel formed on it.

[0045] For example, a third cooling channel is formed on the inner bottom wall of the first housing 5. The inner bottom wall of the first housing 5 can cool and dissipate heat to the bottom of the first battery cell module 1, and the first cold plate 34 can cool and dissipate heat to the top of the first battery cell module 1, thereby reducing the temperature difference between the upper and lower ends of the first battery cell module 1, which is beneficial to increasing the cycle life of the first battery cell module 1 and reducing the risk of thermal runaway.

[0046] The battery also includes a third thermally conductive layer, which is disposed between the inner bottom wall of the first housing 5 and the first cell module 1, connecting the inner bottom wall of the first housing 5 and the first cell module 1. The third thermally conductive layer can improve the heat transfer efficiency between the inner bottom wall of the first housing 5 and the first cell module 1, enabling the inner bottom wall of the first housing 5 to effectively cool and dissipate heat from the first cell module 1.

[0047] For example, the third thermally conductive layer is, for instance, a thermally conductive structural adhesive or a thermally conductive pad.

[0048] For example, the first housing 5 includes four side walls and a cold plate serving as the bottom wall. The four side walls and the cold plate are arranged to form the first housing 5, and an anti-expansion beam is also provided between two oppositely arranged side walls. The cold plate and the four side walls are connected by friction stir welding.

[0049] In some examples, as shown in Figure 5, at least one inner wall surface of the second housing 6 has a fourth cooling channel formed therein. It is understood that the inner wall surface with the fourth cooling channel contacts the second battery cell module 2, allowing the inner wall surface of the second housing 6 to cool and dissipate heat from the second battery cell module 2. That is, at least both ends of the second battery cell module 2 have cooling structures, meaning the second battery cell module 2 is simultaneously cooled by the inner wall surface of the second housing 6 and the second cold plate 35. This achieves multi-end heat dissipation for the second battery cell module 2, improving the temperature uniformity of the second battery cell module 2, reducing the temperature difference between different ends of the second battery cell module 2, and thus increasing the cycle life of the second battery cell module 2.

[0050] Meanwhile, instead of adding cooling components to the second housing 6, a fourth cooling channel is formed directly on the inner wall surface of the second housing 6, thus reusing the inner wall surface of the second housing 6 and simplifying its structure. For example, a cold plate can be used as the side wall or bottom wall of the second housing 6, and the cold plate has a fourth cooling channel formed on it.

[0051] For example, a fourth cooling channel is formed on the inner bottom wall of the second housing 6. The inner bottom wall of the second housing 6 can cool and dissipate heat to the bottom of the second battery cell module 2 and to the top of the second battery cell module 2, thereby reducing the temperature difference between the upper and lower ends of the second battery cell module 2, which helps to increase the cycle life of the second battery cell module 2 and reduce the risk of thermal runaway.

[0052] The battery also includes a fourth thermally conductive layer, which is disposed between the inner bottom wall of the second housing 6 and the second cell module 2, connecting the inner bottom wall of the second housing 6 and the second cell module 2. The fourth thermally conductive layer can improve the heat transfer efficiency between the inner bottom wall of the second housing 6 and the second cell module 2, enabling the inner bottom wall of the second housing 6 to effectively cool and dissipate heat from the second cell module 2.

[0053] The fourth thermally conductive layer may be, for example, a thermally conductive structural adhesive or a thermally conductive pad.

[0054] For example, the second housing 6 includes four side walls and a cold plate serving as the bottom wall. The four side walls and the cold plate are arranged to form the second housing 6, and an anti-expansion beam is also provided between two oppositely arranged side walls. The cold plate and the four side walls are connected by friction stir welding.

[0055] In some embodiments, as shown in Figures 5 and 6, one end of the first housing 5 is formed with a first opening 53 communicating with the first mounting cavity 51, and one end of the second housing 6 is formed with a second opening 63 communicating with the second mounting cavity 61. One end of the first housing 5 is connected to one end of the second housing 6, and the first opening 53 and the second opening 63 are arranged opposite to each other.

[0056] It is understandable that the first cell module 1 can be installed in the first mounting cavity 51 through the first opening 53, and the second cell module 2 can be installed in the second mounting cavity 61 through the second opening 63. The second housing 6 is placed on top of the first housing 5, and the first housing 5 and the second housing 6 are connected to complete the battery assembly.

[0057] The second opening 63 of the second housing 6 is directly opposite the first opening 53 of the first housing 5, so neither the first housing 5 nor the second housing 6 needs to be equipped with a top cover, which simplifies the battery structure.

[0058] In some embodiments, as shown in FIG2, the battery further includes a seal 7, which is disposed at the connection between the first housing 5 and the second housing 6.

[0059] Understandably, the seal 7 can improve the sealing performance at the connection between the first housing 5 and the second housing 6, thereby improving the sealing performance of the battery.

[0060] For example, the seal 7 is a sealing ring or sealant.

[0061] Embodiments of this application also disclose an electrical device, including the battery described above.

[0062] According to the embodiments of this application, in the electrical device, a cooling assembly 3 is disposed between the first cell module 1 and the second cell module 2. The first cold plate 34 of the cooling assembly 3 can cool and dissipate heat from the first cell module 1, and the second cold plate 35 of the cooling assembly 3 can cool and dissipate heat from the second cell module 2, thereby achieving simultaneous cooling and dissipation of the first cell module 1 and the second cell module 2. The first cell module 1 and the second cell module 2 share a single cooling assembly 3, simplifying the battery structure. The heat-conducting component 31 can conduct heat between the first cold plate 34 and the second cold plate 35. Heat exchange between the first cold plate 34 and the second cold plate 35 is facilitated by the heat-conducting component 31, which helps to uniformly distribute the temperature between the first cell module 1 and the second cell module 2, reduce the temperature difference between the first cell module 1 and the second cell module 2, improve the temperature uniformity of the battery, and thus improve the cycle life of the battery, thereby increasing the range of the electrical device.

[0063] It should be noted that electrical equipment can be vehicles, aircraft, or household appliances. It is important to note that the above examples are merely illustrative and do not impose any specific limitations on the types of electrical equipment used.

Claims

1. A battery, comprising: The first battery cell module includes multiple first battery cells; The second battery cell module includes a plurality of second battery cells, and the second battery cell module is disposed opposite to the first battery cell module. A cooling assembly is located between the first battery cell module and the second battery cell module. The cooling assembly includes a heat-conducting component and a first cold plate and a second cold plate disposed opposite to each other. The heat-conducting component connects the first cold plate and the second cold plate. The first cold plate abuts against the first battery cell module, and the second cold plate abuts against the second battery cell module.

2. The battery according to claim 1, wherein, The heat-conducting component is located between the first cold plate and the second cold plate, wherein, The orthographic projection of the first cold plate onto the first cell module coincides with the orthographic projection of the heat-conducting component onto the first cell module; and / or, The orthographic projection of the second cold plate onto the second cell module coincides with the orthographic projection of the heat-conducting component onto the second cell module.

3. The battery according to claim 1, wherein, The first cold plate has at least two first flow channel groups, wherein, A first receiving space is provided between two adjacent first flow channel groups, and part of the heat-conducting element is located in the first receiving space; and / or, The first flow channel group includes at least two first cooling flow channels, with a portion of the heat-conducting element located between two adjacent first cooling flow channels.

4. The battery according to claim 3, wherein, The first cold plate has at least two first flow channel groups, and the second cold plate has at least two second flow channel groups, with the at least two first flow channel groups and the at least two second flow channel groups being staggered.

5. The battery according to claim 4, wherein, A first receiving space is provided between two adjacent first flow channel groups, and part of the heat-conducting element is located in the first receiving space; and / or, The first flow channel group includes at least two first cooling flow channels, with a portion of the heat-conducting element located between two adjacent first cooling flow channels; and / or, A second receiving space is provided between two adjacent second flow channel groups, and part of the heat-conducting element is located in the second receiving space; and / or, The second flow channel group includes at least two second cooling flow channels, with a portion of the heat-conducting element located between two adjacent second cooling flow channels.

6. The battery according to any one of claims 1 to 5, wherein, The battery further includes a first thermally conductive layer disposed between the first cell module and the cooling assembly, the first thermally conductive layer connecting the first cell module and the first cold plate; and / or The battery further includes a second thermally conductive layer, which is disposed between the second cell module and the cooling assembly, and connects the second cell module and the second cold plate.

7. The battery according to any one of claims 1 to 5, wherein, The battery also includes a first housing and a second housing. The first housing has a first mounting cavity, in which the first cell module is installed. The second housing has a second mounting cavity, in which the second cell module is installed.

8. The battery according to claim 7, wherein, At least one inner wall surface of the first housing is formed with a third cooling channel, and / or at least one inner wall surface of the second housing is formed with a fourth cooling channel.

9. The battery according to claim 8, wherein, The third cooling channel is formed on the inner bottom wall of the first housing, and the fourth cooling channel is formed on the inner bottom wall of the second housing.

10. The battery according to claim 8, wherein, The battery further includes a third thermally conductive layer, which is disposed between the inner bottom wall of the first housing and the first cell module, and the third thermally conductive layer connects the inner bottom wall of the first housing and the first cell module. And / or, The battery also includes a fourth thermally conductive layer, which is disposed between the inner bottom wall of the second housing and the second cell module, and the fourth thermally conductive layer connects the inner bottom wall of the second housing and the second cell module.

11. The battery according to claim 7, wherein, One end of the first housing has a first opening communicating with the first mounting cavity, and one end of the second housing has a second opening communicating with the second mounting cavity. One end of the first housing is connected to one end of the second housing. The first opening and the second opening are arranged opposite to each other. The first housing closes the second opening, and the second housing closes the first opening.

12. The battery according to claim 11, wherein, The battery also includes a seal, which is located at the connection between the first housing and the second housing.

13. An electrical device comprising a battery as described in any one of claims 1 to 12.

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