Battery module and vehicle

Abstract

The utility model provides a battery module and a vehicle. The battery module comprises a shell and a battery cell group mounted in the shell. The battery cell group comprises a plurality of battery pieces, the thickness direction of the battery pieces is taken as a first direction, and the plurality of battery pieces are stacked along the first direction. The shell is provided with an expansion connecting position, and the expansion connecting position is used for being connected with another battery module in a second direction perpendicular to the first direction. The battery pieces are stacked in the thickness direction, so that the universality of the battery module is improved, and the size of the battery module can be changed by stacking different numbers of battery pieces, so that the battery module is matched with a working platform. On the other hand, due to the fact that the expansion connecting positions are arranged, the multiple battery modules can be assembled and connected through the expansion connecting positions so as to meet the size and electric quantity requirements of the working platform, and the platformization degree of the battery modules is further improved.

Description

Technical Field

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

[0002] With the rise of new energy vehicles, power batteries have also developed rapidly and their designs have become increasingly diversified. For different models, especially in the field of commercial vehicles, there are many types of power batteries. For power batteries of different sizes and types, it is necessary to develop battery modules separately for each power battery.

[0003] Take blade batteries as an example. Blade batteries are widely used in power batteries because of their advantages such as high safety, low cost and high energy density. Different blade batteries have certain differences in length and height. Different power batteries need to match different blade batteries, which has a long development cycle and high development costs. Utility Model Content

[0004] The present application provides a battery module and a vehicle to solve related technical problems.

[0005] The present application provides a battery module, comprising a housing and a battery cell group installed in the housing;

[0006] The battery cell group includes a plurality of battery cells, with the thickness direction of the battery cells being a first direction, and the plurality of battery cells are stacked along the first direction;

[0007] The housing is provided with an expansion connection position, and the expansion connection position is used to connect another battery module in a second direction perpendicular to the first direction.

[0008] Furthermore, the shell includes a pair of end plates, the end plates are arranged on both sides of the battery cell group in the first direction, and the extended connection position is arranged on the end plates.

[0009] Furthermore, the end plate is rectangular, the number of the expansion connection positions is set to at least four, and the four expansion connection positions are respectively arranged at four corners of the end plate.

[0010] Furthermore, the side edge of the end plate protrudes to form a connecting ear, and the extended connecting position includes a connecting hole arranged in the connecting ear.

[0011] Furthermore, the connecting ear protrudes toward a third direction, and the third direction is perpendicular to the first direction and the second direction.

[0012] Further, the battery cell group includes a plurality of sub-battery cell groups, the shell includes a plurality of heat sinks spaced apart along the second direction, the sub-battery cell groups are arranged between adjacent heat sinks, and the sub-battery cell groups are thermally coordinated with the heat sinks.

[0013] Furthermore, the sub-cell groups and the heat dissipation plates are alternately arranged in the second direction.

[0014] Furthermore, the heat sink is hollow, and is provided with a water inlet and a water outlet which are connected with the interior of the heat sink.

[0015] Further, the heat dissipation plate includes a main body abutting against the battery cell group;

[0016] In the third direction, two sides of the main body extend to form a pair of convex plates respectively. The third direction is perpendicular to the first direction and the second direction. The water inlet and the water outlet are respectively arranged on the pair of convex plates.

[0017] The present application also provides a vehicle, comprising the above-mentioned battery module.

[0018] Since the battery cells are stacked in the thickness direction, the size of the battery module can be changed by stacking different numbers of battery cells to meet the diverse size requirements under the same or different platforms, thereby improving the versatility of the battery module. At the same time, since an expansion connection position is provided, the battery module can be expanded in number through the expansion connection position. Multiple battery modules can be assembled and connected through the expansion connection position to match the size and power requirements of the working platform, further improving the platformization of the battery module.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0021] Figure 1 is a structural diagram of a battery module in an exemplary embodiment of the present application;

[0022] Figure 2 is a structural diagram of a power battery in an exemplary embodiment of the present application;

[0023] Figure 3 It is a partial structural diagram of a power battery in an exemplary embodiment of the present application.

[0024] Description of the accompanying drawings: shell, 10; extended connection position, 100; connection hole, 101; end plate, 11; connection ear, 111; heat sink, 12; water inlet, 1201; main body, 121; convex plate, 122; battery cell group, 20; sub-battery cell group, 200; battery cell, 21; power battery, 30; upper shell, 31; lower shell, 32; sealing gasket, 33; water pipe, 34. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0026] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this specification should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate the existence of one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0027] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms of "a", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0028] Next, the embodiments of this specification are described in detail.

[0029] With the rise of new energy vehicles, the types of power batteries are gradually increasing, the designs are becoming more diverse, and the sizes of power batteries are increasing accordingly. For power batteries of different sizes and types, it is necessary to develop battery modules separately, which takes a long time and is expensive. This application provides a battery module and a vehicle to solve the above problems.

[0030] like Figure 1 As shown, the present application provides a battery module 1, including a shell 10 and a battery cell group 20. The battery cell group 20 is installed in the shell 10. The battery cell group 20 includes a plurality of battery cells 21. With the thickness direction of the battery cell 21 as the first direction, the plurality of battery cells 21 are stacked along the first direction. The shell 10 is provided with an expansion connection position 100. The expansion connection position 100 is used to connect another battery module 1 in a second direction perpendicular to the first direction.

[0031] Since the battery cells 21 are stacked in the thickness direction, the size of the battery module 1 can be changed by stacking different numbers of battery cells 21 to meet diverse size requirements under the same or different platforms, thereby improving the versatility of the battery module 1.

[0032] In addition, the battery module 1 is also compatible with different types of battery cells 21. Different types of battery cells 21 have different thicknesses. By stacking in the thickness direction, the battery cell group 20 composed of different types of battery cells 21 can have similar thicknesses. Under the same size requirement, more different types of battery cells 21 can be selected to further improve the versatility of the battery module 1. Under the premise of meeting functional requirements such as capacity and internal resistance, battery cells 21 of different sizes can also be used in the same battery module 1.

[0033] At the same time, since an expansion connection position 100 is provided, the battery module 1 can be expanded in number through the expansion connection position 100. Multiple battery modules 1 can be assembled and connected through the expansion connection position 100 to match the size and power requirements of the working platform, further improving the platformization of the battery module 1. Multiple battery modules 1 are arranged along the second direction to prevent interference with the size in the first direction. For different size requirements, only the stacking of the battery cells 21 needs to be considered, and the versatility of the battery module 1 is further improved.

[0034] The number of the expansion connection positions 100 may be one or more. When the number of the expansion connection positions 100 is one, one battery module 1 can be assembled with another battery module 1 through the expansion connection position 100. When the number of the expansion connection positions 100 is two, the two expansion connection positions 100 can be located on both sides of the battery module 1 in the second direction, and the battery module 1 can be expanded in quantity on both sides, and multiple battery modules 1 can be connected and fixed through the expansion connection positions 100. The specific number of the expansion connection positions 100 is not limited, and a larger number of expansion connection positions can be set to improve the fixing strength.

[0035] The present application also provides a vehicle, including the above-mentioned battery module 1. Since the battery module 1 of the present application has a high degree of platformization, it is not necessary to develop the battery module 1 separately for the power battery 30 used in different vehicles, thereby improving the production efficiency of the vehicle and reducing the production cycle and cost. The vehicle of the present application can be an electric vehicle or a hybrid vehicle.

[0036] like Figure 1 and 2 As shown, the first direction is the height direction of the vehicle, and the second direction can be the front-to-back direction of the vehicle or the left-to-right direction of the vehicle. By setting different numbers of battery cells 21, the battery module 1 can match the sizes of different power batteries 30 in the height direction. Multiple battery modules 1 can be installed and fixed by extending the connection position 100 to meet the size requirements and corresponding power requirements of the power battery 30 in the second direction. In the power battery 30 of the same size, different types of battery cells 21 can also be used, and the size of the battery cell group 20 can be matched with the power battery 30 by stacking the thickness.

[0037] like Figure 1 As shown, the housing 10 includes a pair of end plates 11 and a heat sink 12 connected to the end plates 11. The plurality of heat sinks 12 are spaced apart along the second direction. The end plates 11 and the heat sink 12 can be welded or riveted to fix. The end plates 11 are arranged on both sides of the battery cell group 20 in the first direction, and the extended connection position 100 is arranged on the end plates 11. By fixing the two ends, the installation strength of the battery module 1 can be improved.

[0038] On the other hand, since the battery modules 1 are expanded in number and multiple battery modules 1 are distributed along the second direction, the expansion connection position 100 is set on the end plate 11, which can avoid the installation space on both sides of the battery module 1 in the second direction. The multiple battery modules 1 can be installed more compactly, so that the battery module 1 can be applied to a smaller power battery 30, further improving the platformization degree of the battery module 1.

[0039] In one embodiment, the end plate 11 may be rectangular for easy manufacturing. In this embodiment, the number of expansion connection positions 100 may be set to at least four, wherein the four expansion connection positions 100 are respectively set at the four corners of the end plate 11. By setting a plurality of expansion connection positions 100, the fixing strength of the battery module 1 during expansion connection is improved. In other embodiments, the shape of the end plate 11 is not limited, and the number of expansion connection positions 100 is also not limited.

[0040] In one embodiment, the end plate 11 protrudes from the side to form a connecting ear 111, and the extended connecting position 100 can be a connecting hole 101 disposed on the connecting ear 111. Figure 1As shown, the connecting ears 111 are formed by protruding from both sides of the end plate 11, and two connecting ears 111 are provided on each side. The hole structure is easy to manufacture, which reduces the production cost of the battery module 1. In other embodiments, the structure of the extended connection position 100 is not limited, and can be a buckle or a bump.

[0041] At the same time, the expansion connection position 100 is set on the connection ear 111, avoiding the installation space of the battery cell 21, and preventing the assembly of the battery cell 21 from being affected. When the battery module 1 is manufactured, there is no need to develop a special battery cell 21 specifically, which further improves the versatility of the battery module 1. The specific position of the expansion connection position 100 is not limited, and multiple battery modules 1 can be installed through the expansion connection position 100.

[0042] In one embodiment, if Figure 1 As shown, the connecting ear 111 can protrude toward the third direction, and the third direction is perpendicular to the first direction and the second direction. The connecting ear 111 extends toward the third direction, which can avoid the space on both sides of the battery module 1 in the second direction. Multiple battery modules 1 can be installed more compactly, and the battery module 1 can be applied to a small-volume power battery 30, further enhancing the versatility of the battery module 1.

[0043] The battery cell group 20 includes a plurality of sub-battery cell groups 200. The sub-battery cell groups 200 are arranged between adjacent heat sinks 12. The sub-battery cell groups 200 cooperate with the heat sink 12 to dissipate heat from the battery cell group 20. In one embodiment, the sub-battery cell groups 200 and the heat sink 12 are alternately arranged in the second direction to form a sandwich structure. Both sides of the sub-battery cell group 200 in the second direction can conduct heat, thereby increasing the heat dissipation area and enhancing the cooling effect. A thermally conductive adhesive can be applied or a related thermally conductive structure can be provided between the heat sink 12 and the battery cell group 20 to enhance the heat exchange capacity between the heat sink 12 and the battery cell group 20.

[0044] In one embodiment, if Figure 1 and Figure 2 As shown, the heat sink 12 can be hollow, and the heat sink 12 is provided with a water inlet 1201 and a water outlet (not shown in the figure) connected to the inside of the heat sink 12. The power battery 30 also includes a water pipe 34, which is connected to the water inlet 1201 and the water outlet respectively. The heat sink 12 can dissipate heat from the battery cell group 20 by liquid cooling, and has a good cooling effect. In other embodiments, the specific heat dissipation method of the heat sink 12 is not limited, and can be air cooling, etc.

[0045] In one embodiment, if Figure 1As shown, the heat sink 12 may include a main body 121. The main body 121 abuts against the battery cell group 20. In the third direction, both sides of the main body 121 extend to form a pair of convex plates 122. The third direction is perpendicular to the first direction and the second direction. The water inlet 1201 and the water outlet are respectively arranged on the pair of convex plates 122.

[0046] The water inlet 1201 and the water outlet are arranged on both sides of the heat sink 12, which can increase the travel distance of the coolant and enhance the heat dissipation effect. At the same time, the convex plate 122 is extended in the third direction to avoid the space of the battery module 1 in the second direction. Multiple battery modules 1 can be assembled more compactly along the second direction. The battery module 1 can meet the application requirements of the small-volume power battery 30, further improving the platformization degree of the battery module 1.

[0047] The battery cell 21 may be a blade battery. Currently, the thickness of the blade battery is greater than or equal to 12 mm and less than or equal to 25 mm. By stacking different numbers of blade batteries, the height of the battery pack 20 can be greater than or equal to 130 mm and less than or equal to 400 mm. The battery cells 21 can be connected by gluing.

[0048] like Figures 1 to 3 As shown, the battery module 1 is installed in the power battery 30. The power battery 30 includes an upper shell 31, a lower shell 32 and a sealing gasket 33. The upper shell 31, the lower shell 32 and the sealing gasket 33 are assembled to form a relatively closed space, and the battery module 1 is assembled in the closed space. By setting battery modules 1 of different heights, it is possible to match power batteries 30 with a design height greater than or equal to 130 mm and less than or equal to 420 mm, basically covering the height dimensions of all power batteries.

[0049] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Moreover, the above embodiments can complement each other in the absence of conflict. Although the present application has been disclosed as a preferred embodiment as above, it is not used to limit the present application. Any technician familiar with this profession can make some changes or modify the technical content disclosed above to an equivalent embodiment of equivalent changes without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A battery module, characterized in that: include: A housing and a battery cell assembly installed in the housing; The battery cell group includes a plurality of battery cells, with the thickness direction of the battery cells being a first direction, and the plurality of battery cells are stacked along the first direction; The housing is provided with an expansion connection position, and the expansion connection position is used to connect another battery module in a second direction perpendicular to the first direction.

2. The battery module according to claim 1, characterized in that: The shell includes a pair of end plates, the end plates are arranged on both sides of the battery cell group in the first direction, and the extended connection position is arranged on the end plates.

3. The battery module according to claim 2, characterized in that: The end plate is rectangular, the number of the expansion connection positions is set to at least four, and the four expansion connection positions are respectively arranged at four corners of the end plate.

4. The battery module according to claim 2, characterized in that: The side edge of the end plate protrudes to form a connecting ear, and the extended connecting position includes a connecting hole arranged on the connecting ear.

5. The battery module according to claim 4, characterized in that: The connecting ear protrudes toward a third direction, and the third direction is perpendicular to the first direction and the second direction.

6. The battery module according to claim 1, characterized in that: The battery cell group includes a plurality of sub-battery cell groups, the shell includes a plurality of heat sinks spaced apart along the second direction, the sub-battery cell groups are arranged between adjacent heat sinks, and the sub-battery cell groups are thermally coordinated with the heat sinks.

7. The battery module according to claim 6, characterized in that: The sub-cell groups and the heat dissipation plates are alternately arranged in the second direction.

8. The battery module according to claim 6, characterized in that: The heat sink is hollow and is provided with a water inlet and a water outlet which are connected with the inside of the heat sink.

9. The battery module according to claim 8, characterized in that: The heat dissipation plate includes a main body abutting against the battery cell group; In the third direction, two sides of the main body extend to form a pair of convex plates respectively. The third direction is perpendicular to the first direction and the second direction. The water inlet and the water outlet are respectively arranged on the pair of convex plates.

10. A vehicle, characterized in that: include: A battery module as claimed in any one of claims 1 to 9.

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