Batteries and battery modules

Abstract

This application provides a battery and a battery module. The battery includes: a plurality of cells, each cell including a cell body and terminals connected to the cell body; a CCS assembly including a busbar; the busbar connecting the terminals; and a cooling assembly located on the side of the CCS assembly away from the cells. The cooling assembly includes at least one cooling section and a clearance section connected to the cooling section; wherein at least a portion of the cooling section is located within the gap between two adjacent terminals, and the clearance section is located on the side of the terminals away from the cell body. The battery and battery module provided by this application can reduce the Z-axis height space occupied by the cooling assembly.

Description

Technical Field

[0001] This application relates to the field of liquid cooling technology, specifically to a battery and a battery module. Background Technology

[0002] Currently, liquid cooling with a stamped cold plate is a common liquid cooling method in cylindrical battery systems. The stamped cold plate is integrated on the top of the cylindrical cell, and the heat from the cell is transferred to the stamped cold plate through the cell terminals to control the cell temperature.

[0003] When a stamped cold plate is placed on top of the battery cell to control the cell temperature, one disadvantage is that the stamped cold plate occupies the Z-axis height space. Utility Model Content

[0004] The embodiments of this application provide a battery and a battery module that can reduce the Z-axis height space occupied by the cooling components.

[0005] In a first aspect, embodiments of this application provide a battery, the battery comprising:

[0006] Multiple battery cells, each battery cell including a battery cell body and a terminal connected to the battery cell body;

[0007] CCS component, including bus; the terminal connection of the bus; and

[0008] A cooling assembly is located on the side of the CCS assembly away from the battery cell. The cooling assembly includes at least one cooling section and a clearance section connected to the cooling section.

[0009] The cooling section is located at least partly within the gap between two adjacent terminals, and the clearance section is located on the side of the terminal away from the cell body.

[0010] In some embodiments of this application, the cooling assembly includes a cooling plate and a flow channel plate connected to each other, the flow channel plate being located between the cooling plate and the busbar;

[0011] The cooling plate and the flow channel plate form cooling channels at positions corresponding to the cooling part, and the cooling channels contain a cooling medium.

[0012] In some embodiments of this application, the battery cell extends along a first direction, and the cooling portion protrudes from the clearance portion along the first direction;

[0013] The cooling component has a clearance groove at the position corresponding to the clearance part, and the pole and the busbar are located in the clearance groove.

[0014] In some embodiments of this application, in the first direction, the distance between the flow channel plate corresponding to the avoidance portion and the cooling plate is greater than or equal to 0, and less than the distance between the cooling plate corresponding to the cooling portion and the flow channel plate.

[0015] In some embodiments of this application, the flow channel plate corresponding to the avoidance portion is in contact with the cooling plate.

[0016] In some embodiments of this application, one of the two adjacent poles is a first pole and the other is a second pole, and a busbar is located between the first pole and the second pole and connected to the first pole; at least a portion of the cooling section is located in the gap between the second pole and the busbar connected to the first pole.

[0017] In some embodiments of this application, the battery cell extends along a first direction, and a plurality of the battery cells are spaced apart along a second direction, the second direction intersecting the first direction;

[0018] The busbar includes a connecting portion, and the connecting portion is connected to the corresponding pole post;

[0019] At least a portion of the cooling section is located between the corresponding pole and the connecting section.

[0020] In some embodiments of this application, the busbar further includes an extension portion connected to the connecting portion and extending along the second direction, the extension portion being located between two adjacent pole posts;

[0021] In the first direction, the extension is located between the cooling section and the battery cell.

[0022] In some embodiments of this application, the end of the cooling portion away from the cooling plate contacts the extension portion.

[0023] In some embodiments of this application, the distance between one of the cooling sections and the second electrode post is d1, and the distance between the cooling section and the busbar connected to the first electrode post is d2, wherein d1 and d2 satisfy:

[0024] 0≤d2≤d1.

[0025] Secondly, this application also provides a battery module, which includes the battery as described above.

[0026] The battery and battery module provided in this application include a battery comprising multiple cells, a CCS module, and a cooling module; each cell includes a terminal post; the CCS module includes a busbar connected to the terminal post; the cooling module is located on the side of the CCS module away from the cell and includes at least one cooling section; wherein at least a portion of the cooling section is located within the gap between two adjacent terminal posts, and the clearance section is located on the side of the terminal post away from the cell body. By integrating the cooling module into the end of the terminal post away from the cell body 12, and such that at least a portion of the cooling section is located within the gap between two adjacent terminal posts, and the clearance section is located on the side of the terminal post away from the cell body, this application can reduce the Z-axis height space occupied by the cooling module compared to the prior art which places the cooling module at one end of the terminal post. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional schematic diagram of a battery provided in some embodiments of this application.

[0029] Figure 2 yes Figure 1 The exploded view of the battery is shown.

[0030] Figure 3 yes Figure 2 The diagram shows the connection diagram of the battery cell and CCS assembly.

[0031] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the cooling assembly of the battery shown.

[0032] Figure 5 yes Figure 1 The image shows a cross-sectional view of the battery.

[0033] Figure 6 yes Figure 5 A magnified view of point A on the battery shown.

[0034] Figure 7 This is a schematic diagram of a battery module provided in some embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100. Battery module; 110. Battery; 10. Cell; 11. Terminal; 12. Cell body; 20. CCS module; 21. Busbar; 30. Cooling assembly; 31. Cooling section; 32. Clearance section; 33. Clearance groove; 111. Gap; 301. Cooling plate; 302. Flow channel plate; 303. Cooling flow channel; 211. Connecting part; 212. Extension part; Z, First direction; X, Second direction; 40. Housing; 50. Cover plate. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0038] In related technologies, liquid cooling with a stamped cold plate placed on top of the cell is used to control the cell temperature. The disadvantages are: first, the stamped cold plate occupies the height space in the Z direction (the extension direction of the cell); second, the heat dissipation efficiency is low due to the small area of ​​the cell electrode.

[0039] To address the aforementioned issues, embodiments of this application provide a battery 110.

[0040] Please see Figures 1 to 6 The battery 100 includes a plurality of cells 10, a cell contacting system (CCS) assembly 20, and a cooling assembly 30; each cell 10 includes a cell body 12 and a terminal post 11 connected to the cell body 12; the CCS assembly 20 includes a busbar 21 connected to the terminal post 11; the cooling assembly 30 is located on the side of the CCS assembly 20 away from the cells, and the cooling assembly 30 includes at least one cooling section 31 and a clearance section 32 connected to the cooling section 31; wherein at least a portion of the cooling section 31 is located within a gap 111 between two adjacent terminals 11, and the clearance section 32 is located on the side of the terminal post 11 away from the cell body 12.

[0041] This application integrates the cooling component 30 into the end of the electrode 11 of the battery cell 10 away from the battery cell body 12, and makes at least a portion of the cooling part located in the gap between two adjacent electrodes, with the clearance portion located on the side of the electrode away from the battery cell body. Compared with the prior art where the cooling component is placed at one end of the electrode, this application can reduce the height space occupied by the cooling component 30 in the Z direction (the extension direction of the battery cell 10, i.e., the first direction Z).

[0042] In some embodiments of this application, one of the two adjacent poles 11 is a first pole and the other is a second pole. A busbar 21 is located between the first pole and the second pole and connected to the first pole. At least a portion of the cooling section 31 is located within the gap 111 between the second pole and the busbar 21 connected to the first pole. Because at least a portion of the cooling section 31 is located within the gap 111 between the second pole and the busbar 21 connected to the first pole, the peripheries of the poles 11 and the busbar 21 can directly face the cooling section 31, increasing the effective heat dissipation area of ​​the poles 11 and the busbar 21 with the cooling assembly 30, thereby effectively improving heat dissipation efficiency.

[0043] In this embodiment, the battery cell 10 is a cylindrical battery cell. In other embodiments, the battery cell 10 is not limited to a cylindrical battery cell, and can also be a battery cell of other shapes, such as a prismatic battery cell.

[0044] In this embodiment, the battery cell 10 further includes a battery cell body 12, and the terminal post 11 is connected to the battery cell body 12.

[0045] In this embodiment, the pole 11 and the busbar 21 can be electrically connected by welding or other means.

[0046] In this embodiment, the busbar 21 is also called an aluminum busbar or "Busbar".

[0047] In this embodiment, there is a gap between the two terminals 11 of two adjacent and spaced-apart battery cells 10, and at least one busbar 21 connected to the terminal 11 is located in the first gap. The busbar 21 occupies a part of the space of the gap, and the gap 111 is the space after removing the part of the space occupied by the busbar 21 from the gap.

[0048] In some embodiments of this application, the cooling assembly 30 includes a cooling plate 301 and a flow channel plate 302 connected to each other, with the flow channel plate 302 located between the cooling plate 301 and the electrode post 11. The cooling plate 301 and the flow channel plate 302 form cooling channels 303 at positions corresponding to the cooling section 31. The cooling channels 303 contain a cooling medium for dissipating heat from the battery cell 10. At least a portion of the cooling section 31 is located within the gap 111, that is, at least a portion of the cooling channel 303 is located within the gap 111, meaning that at least a portion of the cooling channel 303 is embedded between two adjacent electrode posts 11, saving Z-axis space in the battery and improving the overall volume utilization and energy density of the battery module.

[0049] In this embodiment, the cooling plate 301 and the flow channel plate 302 are fitted or sealed together to prevent the cooling medium in the cooling flow channel 303 from leaking out.

[0050] In this embodiment, the flow channel plate 302 corresponding to the location of the cooling part 31 is bent away from the side of the cooling plate 301 (i.e., the cooling part 31 protrudes along the first direction Z) to form a cooling flow channel on the flow channel plate 302, and the cooling plate 301 can seal the cooling flow channel.

[0051] In this embodiment, the flow channel plate 302 can be formed by stamping or other methods.

[0052] In this embodiment, the cooling plate 301 is a flat plate.

[0053] Generally, the cooling plate 301 primarily serves a supporting and temperature-equalizing function, requiring a certain thickness for both. The flow channel plate 302, on the other hand, mainly guides the fluid; its thin walls facilitate weight reduction and compact design. Furthermore, the internal flow channels within the flow channel plate 302 are formed through etching or stamping, and excessive thickness would increase manufacturing difficulty. Therefore, in most liquid cooling plate designs, the thickness of the cooling plate 301 is greater than that of the other plate.

[0054] In this embodiment, the cooling plate 301 is disposed away from the battery cell, while the flow channel plate 302 is disposed close to the battery cell 10. Since the thickness of the flow channel plate 302 is generally less than the thickness of the cooling plate 301, compared to the prior art where the cooling plate 301 is disposed close to the battery cell, the flow channel plate 302 in this embodiment is disposed close to the battery cell 10. By using the flow channel plate 302 as a heat exchange plate between the battery cell 10 and the CCS module 20, and directly exchanging heat between the battery cell 10 and the CCS module 20, the electrode post 11 and the busbar 21 can be placed closer to the cooling medium, thereby enabling faster heat dissipation, improving the battery's heat dissipation efficiency, and resulting in higher economic benefits.

[0055] In some embodiments of this application, the cooling section 31 protrudes from the clearance section 32 along the first direction Z; the cooling assembly has a clearance groove 33 at the position corresponding to the clearance section 32, and the terminal post 11 and the busbar 21 are located within the clearance groove 33. By providing the clearance section 32 connected to the cooling section 31 in the cooling assembly 30, and making the terminal post 11 and the busbar 21 located within the clearance groove 33, this application saves the Z-direction space of the battery and improves the volume utilization rate and energy density of the entire battery module.

[0056] In some embodiments of this application, the gap between the flow channel plate 302 corresponding to the avoidance part 32 and the cooling plate 301 is smaller than the gap between the cooling plate 301 and the flow channel plate 302 corresponding to the cooling part 31.

[0057] When the gap between the flow channel plate 302 and the cooling plate 301 of the connecting part 211 is greater than 0, that is, there is also a cooling flow channel between the flow channel plate 302 and the cooling plate 301 of the connecting part 211, in this way, while saving the Z-direction space of the battery, the end of the terminal 11 and the busbar 21 away from the cell body 12 can also be in close contact with the cooling medium, which can increase the effective heat dissipation area of ​​the terminal 11 and the busbar 21, resulting in higher heat exchange efficiency and better cooling effect.

[0058] When the gap between the flow channel plate 302 and the cooling plate 301 of the connecting part 211 is equal to 0, that is, the flow channel plate 302 and the cooling plate 301 of the connecting part 211 are in close contact, it is beneficial to further save the Z-direction space of the battery and improve the volume utilization rate and energy density of the entire battery module.

[0059] In some embodiments of this application, the battery cell 10 extends along a first direction Z, and a plurality of battery cells 10 are spaced apart along a second direction X, the second direction X intersecting the first direction Z; the busbar 21 includes a connecting portion 211, the connecting portion 211 being connected to the corresponding terminal post 11; wherein, at least a portion of the cooling portion 31 is located between the corresponding terminal post 11 and the connecting portion 211.

[0060] In some embodiments of this application, the busbar 21 further includes an extension 212, which is connected to the connecting portion 211 and extends along the second direction X. The extension 212 is located between two adjacent terminals 11; wherein, in the first direction Z, the extension 212 is located between the cooling portion 31 and the battery cell. This increases the effective heat dissipation area of ​​the busbar 21 and the cooling channel 303, resulting in higher heat exchange efficiency and better cooling effect.

[0061] In some embodiments of this application, the end of the cooling section 31 away from the cooling plate 301 contacts the extension 212. This increases the effective contact area between the busbar 21 and the cooling channel 303, resulting in higher heat exchange efficiency and better cooling effect.

[0062] In some embodiments of this application, the distance between a cooling section 31 and the terminal post 11 located on one side of the cooling section 31 (i.e., the distance between the cooling section 31 and the second terminal post) is d1, and the distance between the cooling section 31 and the busbar 21 located on the other side of the cooling section 31 (i.e., the distance between the cooling section 31 and the busbar 21 connected to the first terminal post) is d2, wherein d1 and d2 satisfy: 0 < d2 ≤ d1. That is, when installing the cooling assembly 30 to one end of the battery cell 10, the cooling section 31 has a certain installation margin, which can reduce the installation difficulty to a certain extent.

[0063] In some embodiments of this application, the cooling assembly 30 may be a stamped liquid cooling plate, a flat tube liquid cooling plate, an aluminum extruded liquid cooling pipeline structure, etc.

[0064] In this embodiment, the cooling component 30 is a stamped liquid cooling plate. Unlike flat tube liquid cooling plates and aluminum extruded liquid cooling pipe structures, stamped liquid cooling plates only require one inlet and one outlet, and the flow rate difference between different areas of the stamped liquid cooling plate is small.

[0065] In some embodiments of this application, the battery 110 further includes a housing 40 and a cover plate 50. The battery cell 10 is located inside the housing 40. The cover plate 50 is fixedly or detachably connected to the housing 40. The CCS assembly 20 is connected to a plurality of terminals 11 of the plurality of battery cells 10, so that the plurality of battery cells 10 can be connected in series or in parallel. The cooling assembly 20 is located between the cover plate 50 and the CCS assembly 20.

[0066] In some embodiments of this application, expanding foam (not shown) can be used to fill the spaces between adjacent battery cells 10 and between the battery cell 10 and the housing 40. This solves the problem of requiring additional sealing between the battery cell 10 and the bottom support, eliminating the need for additional sealing between the battery cell 10 and the battery cell bracket (not shown). Expanding foam has good flame-retardant and heat-insulating properties, preventing the transfer of heat, substances, flames, etc., from one battery cell 10 after thermal runaway to adjacent battery cells 10. In this application, the expanding foam is polyurethane or silicone-based, and this application is not limited to either.

[0067] Secondly, please refer to Figure 7 This application also provides a battery module 100, which includes the battery 110 as described above. The specific structure of the battery is described in the above embodiments. Since this battery module 100 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0068] Furthermore, this utility model also proposes an electrical device, which includes a battery module. The specific structure of the battery module is described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0069] It is understood that electrical equipment includes, but is not limited to, electric toys, power tools, electric vehicles, automobiles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Automobiles can include gasoline-powered cars, natural gas-powered cars, and new energy vehicles.

[0070] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery, characterized in that, include: Multiple battery cells, each battery cell including a battery cell body and a terminal connected to the battery cell body; The CCS component includes a busbar; the busbar is connected to the pole. and A cooling assembly is located on the side of the CCS assembly away from the battery cell. The cooling assembly includes a cooling section and a clearance section connected to the cooling section. The cooling section is located at least partly within the gap between two adjacent terminals, and the clearance section is located on the side of the terminal away from the cell body.

2. The battery as described in claim 1, characterized in that, The cooling assembly includes a cooling plate and a flow channel plate connected to each other, the flow channel plate being located between the cooling plate and the busbar; The cooling plate and the flow channel plate form cooling channels at positions corresponding to the cooling part, and the cooling channels contain a cooling medium.

3. The battery as described in claim 2, characterized in that, The battery cell extends along a first direction, and the cooling portion protrudes from the clearance portion along the first direction; The cooling component has a clearance groove at the position corresponding to the clearance part, and the pole and the busbar are located in the clearance groove.

4. The battery as described in claim 3, characterized in that, In the first direction, the distance between the flow channel plate corresponding to the avoidance part and the cooling plate is greater than or equal to 0, and less than the distance between the cooling plate corresponding to the cooling part and the flow channel plate.

5. The battery as described in claim 4, characterized in that, The flow channel plate corresponding to the avoidance part is in contact with the cooling plate.

6. The battery according to any one of claims 2-5, characterized in that, One of the two adjacent poles is a first pole and the other is a second pole. A busbar is located between the first pole and the second pole and is connected to the first pole. At least a portion of the cooling section is located within the gap between the second pole and the busbar connected to the first pole.

7. The battery as described in claim 6, characterized in that, The battery cell extends along a first direction, and a plurality of the battery cells are spaced apart along a second direction, the second direction intersecting the first direction; The busbar includes a connecting portion, and the connecting portion is connected to the corresponding pole post; At least a portion of the cooling section is located between the corresponding pole and the connecting section.

8. The battery as claimed in claim 7, characterized in that, The busbar further includes an extension portion, which is connected to the connecting portion and extends along the second direction, and the extension portion is located between two adjacent pole posts; In the first direction, the extension is located between the cooling section and the battery cell.

9. The battery as claimed in claim 8, characterized in that, The end of the cooling section away from the cooling plate contacts the extension.

10. The battery as claimed in claim 6, characterized in that, The distance between the cooling section and the second electrode post is d1, and the distance between the cooling section and the busbar connected to the first electrode post is d2. d1 and d2 satisfy the following: 0≤d2≤d1.

11. A battery module, characterized in that, Includes the battery as described in any one of claims 1-10.

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