A battery cell and a battery module having the same

Abstract

The application provides a battery monomer and a battery module with the battery monomer. The battery monomer comprises a battery body, a first wall surface and a second wall surface adjacent to each other, the first wall surface extends along a first direction, and the second wall surface extends along a second direction; a pole is arranged at the first wall surface; a heat dissipation plate has a heat dissipation surface; a groove is arranged at the heat dissipation surface, the battery body is attached to the heat dissipation surface through the second wall surface, and the groove is blocked to form a flow channel, and the flow channel is used for containing refrigerant. Since the flow channel is formed by the heat dissipation plate and the second wall surface, the refrigerant can directly contact the second wall surface and exchange heat, the heat exchange efficiency between the refrigerant and the battery body is improved, and the heat dissipation effect of the battery body is improved. In the height direction of the battery body, the refrigerant can uniformly cool the battery body, the temperature consistency of the battery body is improved, and the service life of the battery body is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cell and a battery module having the battery cell. Background Technology

[0002] Battery thermal management is a core aspect of ensuring battery performance and safety. Current battery thermal management technologies primarily focus on dissipating the heat generated during battery operation, with common cooling methods including air cooling and liquid cooling.

[0003] As battery energy density increases and charge / discharge rates rise, existing air-cooling or liquid-cooling methods have limited heat dissipation effects, easily leading to uneven battery temperature distribution, affecting battery consistency and consequently battery lifespan. Utility Model Content

[0004] This application provides a battery cell and a battery module having the battery cell, which can improve the efficiency of heat exchange between the refrigerant and the battery body, thereby improving the heat dissipation effect on the battery body; and along the height direction of the battery body, the refrigerant can perform uniform heat dissipation treatment on the battery body, improve the temperature uniformity of the battery body, and thus improve the service life of the battery body.

[0005] Firstly, embodiments of this application provide a single battery cell, comprising:

[0006] The battery body has a first wall and a second wall that are adjacent to each other, with the first wall extending along a first direction and the second wall extending along a second direction; an electrode post is provided at the first wall.

[0007] The heat sink has a heat dissipation surface; a groove is provided on the heat dissipation surface, and the battery body is attached to the heat dissipation surface through the second wall and the groove is sealed so that the groove forms a flow channel, and the flow channel is used to contain the refrigerant.

[0008] In one possible implementation, the system further includes an inlet pipe and an outlet pipe, both of which are connected to the flow channel.

[0009] In one possible implementation, the inlet pipe and the outlet pipe are connected to the flow channel along the first direction or the second direction.

[0010] In one possible implementation, the battery body includes a third wall extending in a third direction, the third wall being adjacent to the first wall and the second wall.

[0011] The heat sink has an extension that protrudes from the third wall surface along the first direction; a portion of the groove extends to the extension.

[0012] Both the inlet pipe and the outlet pipe are connected to the extension and communicate with the groove.

[0013] In one possible implementation, a connecting plate is also included, the connecting plate having a first connecting portion and a second connecting portion connected to each other, the first connecting portion and the second connecting portion being perpendicular to each other;

[0014] The first connecting part is connected to the extension, and the second connecting part is connected to the third wall surface; wherein, the inlet pipe and the outlet pipe are both connected to the first connecting part and communicate with the flow channel.

[0015] In one possible implementation, the flow channel includes a plurality of straight sections and at least one connecting section;

[0016] The plurality of straight segments extend along the first direction and are spaced apart along the second direction; two adjacent straight segments are connected by the connecting segment.

[0017] In one possible implementation, the straight segment includes a first straight segment and a second straight segment, wherein along the second direction, the first straight segment is closer to the first wall surface than the second straight segment;

[0018] The inlet pipe is connected to the second straight section, and the outlet pipe is connected to the first straight section.

[0019] In one possible implementation, at least a portion of the outer periphery of the battery body and the heat sink is covered with an insulating layer.

[0020] In one possible implementation, the heat sink is welded to the second wall surface.

[0021] Secondly, embodiments of this application provide a battery module, including...

[0022] First main pipeline;

[0023] Second main pipeline;

[0024] One or more battery cells;

[0025] The first main pipeline is connected to the liquid inlet pipe of one or more of the battery cells; the second main pipeline is connected to the liquid outlet pipe of one or more of the battery cells.

[0026] This application provides a battery cell and a battery module having the battery cell. Since the flow channel is defined by a heat sink and a second wall, when refrigerant is contained in the flow channel, the refrigerant can directly contact and exchange heat with the second wall of the battery body. This significantly improves the efficiency of heat exchange between the refrigerant and the battery body, thereby enhancing the heat dissipation effect on the battery body. Because the second wall extends along a second direction, which is the height direction of the battery body, the flow channel defined by the heat sink and the second wall can dissipate heat from the battery body along its height. This allows the refrigerant to uniformly dissipate heat from the battery body along its height, improving the temperature uniformity of the battery body and thus extending its service life. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 A schematic diagram of a battery cell provided in some embodiments of this application;

[0029] Figure 2 An exploded view of a battery cell with the connecting plate, inlet pipe, and outlet pipe hidden, provided in some embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the assembly of a battery cell with the connecting plate, inlet pipe and outlet pipe hidden, provided in some embodiments of this application.

[0031] Figure 4 A schematic diagram of a connecting plate provided in some embodiments of this application;

[0032] Figure 5 A schematic diagram of a heat sink provided in some embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the assembly of a battery module provided in some embodiments of this application;

[0034] Figure 7 This is an exploded view of a battery module provided in some embodiments of this application.

[0035] Figure label:

[0036] 100. Battery body; 110. First wall surface; 111. Terminal post; 120. Second wall surface; 130. Bottom wall; 140. Third wall surface;

[0037] 200, Heat sink; 210, Heat dissipation surface; 220, Flow channel; 221, Straight section; 221a, First straight section; 221b, Second straight section; 222, Connecting section; 230, Extension;

[0038] 300. Liquid inlet pipe;

[0039] 400. Discharge tube;

[0040] 500. Connecting plate; 510. First connecting part; 511. First through hole; 512. Second through hole; 520. Second connecting part;

[0041] 600. First main pipeline;

[0042] 700, Second Main Pipeline;

[0043] 800, partition;

[0044] 900, end plate.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0047] Battery thermal management is a core aspect of ensuring battery performance and safety. Current battery thermal management technologies primarily focus on dissipating the heat generated during battery operation, with common cooling methods including air cooling and liquid cooling.

[0048] As battery energy density increases and charge / discharge rates rise, the heat dissipation effect of existing air-cooling or liquid-cooling methods becomes limited. Furthermore, heat dissipation devices for battery cooling are typically located on the bottom wall of the battery, which can easily lead to uneven temperature distribution, affecting battery consistency and consequently, battery lifespan.

[0049] This application provides a battery cell and a battery module having the battery cell. Because the flow channel is defined by a heat sink and a second wall, when refrigerant is contained in the flow channel, the refrigerant can directly contact and exchange heat with the second wall of the battery body. This improves the efficiency of heat exchange between the refrigerant and the battery body, thereby enhancing the heat dissipation effect on the battery body. In the second direction, i.e., in the height direction of the battery body, the battery body has a first wall and a bottom wall opposite to the first wall. Normally, the device for heat dissipation of the battery body is located on the bottom wall. However, in this embodiment, the heat sink is located on the second wall, not the bottom wall. That is, the heat sink is located on the circumferential sidewall of the battery body along the second direction. The circumferential sidewall of the battery body along the second direction has a larger surface area than the bottom wall. Therefore, placing the heat sink on the second wall increases the contact area between the heat sink and the second wall, thereby improving the heat dissipation efficiency of the battery body. Furthermore, since the second wall extends along the second direction, which is the height direction of the battery body, the flow channel defined by the heat sink and the second wall can dissipate heat on the battery body in the height direction. This allows the refrigerant to dissipate heat evenly on the battery body along the height direction, improving the temperature uniformity of the battery body and thus increasing its service life.

[0050] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0051] Firstly, see [the following] Figure 1 and Figure 2 As shown, this application embodiment provides a battery cell, which includes a battery body 100. The battery body 100 has a first wall 110 and a second wall 120 that are adjacent to each other. The first wall 110 extends along a first direction X, and the second wall 120 extends along a second direction Y. A terminal post 111 is provided on the first wall 110, and the terminal post 111 is electrically connected to the electrode tab inside the battery body 100.

[0052] When the battery cell of this embodiment is placed vertically, such that the terminal post 111 is located at the top of the entire battery body 100, see... Figure 1 As shown, the first direction X and the second direction Y are perpendicular to each other, and the first direction X is the horizontal direction, while the second direction Y is the vertical direction.

[0053] See Figure 2 , Figure 3 and Figure 5As shown, the battery cell in this embodiment further includes a heat sink 200, which has a heat dissipation surface 210 and is attached to the second wall surface 120 of the battery body 100 via the heat dissipation surface 210. A groove is formed on the heat dissipation surface 210. When the heat dissipation surface 210 is attached to the second wall surface 120, the second wall surface 120 can seal the groove, thereby forming a flow channel 220 for accommodating refrigerant under the constraint of the second wall surface 120.

[0054] Furthermore, the refrigerant contained in the flow channel 220 can be in gaseous or liquid form, without any particular limitation.

[0055] It should be noted that, in this embodiment, since the flow channel 220 is formed by the heat sink 200 and the second wall 120, when the flow channel 220 contains refrigerant, the refrigerant can directly contact the second wall 120 of the battery body 100 and exchange heat, which can better improve the efficiency of heat exchange between the refrigerant and the battery body 100, thereby improving the heat dissipation effect of the battery body 100.

[0056] It is worth mentioning that, in the embodiments of this application, see Figure 1 and Figure 3 As shown, in the second direction Y, that is, in the height direction of the battery body 100, the battery body 100 has a first wall surface 110 and a bottom wall 130 opposite to the first wall surface 110. Normally, a heat dissipation device for heat dissipation of the battery body 100 is provided on the bottom wall 130. However, in this embodiment, the heat dissipation plate 200 is provided on the second wall surface 120, not on the bottom wall 130. That is, the heat dissipation plate 200 is provided on the circumferential side wall of the battery body 100 along the second direction Y. The circumferential side wall of the battery body 100 along the second direction Y has a larger surface area than the bottom wall 130. Therefore, providing the heat dissipation plate 200 on the second wall surface 120 can better increase the contact area between the heat dissipation plate 200 and the second wall surface 120, thereby improving the heat dissipation efficiency of the battery body 100.

[0057] Furthermore, since the second wall 120 extends along the second direction Y, and the second direction Y is the height direction of the battery body 100, the flow channel 220 defined by the heat sink 200 and the second wall 120 can dissipate heat from the battery body 100 in the height direction of the battery body 100, so that the refrigerant can dissipate heat from the battery body 100 uniformly along the height direction of the battery body 100, thereby improving the temperature uniformity of the battery body 100 and thus improving the service life of the battery body 100.

[0058] In some implementations, see Figure 1As shown, the battery cell also includes an inlet pipe 300 and an outlet pipe 400, both of which are connected to the flow channel 220. The inlet pipe 300 can deliver refrigerant into the flow channel 220, allowing the refrigerant to directly contact the second wall 120 inside the flow channel 220 for heat exchange with the battery body 100. The outlet pipe 400 can discharge the refrigerant from the flow channel 220.

[0059] For example, in the battery cell of this application embodiment, when the battery cell is in working condition, the refrigerant enters the flow channel 220 through the liquid inlet pipe 300. During the flow of the refrigerant in the flow channel 220, the refrigerant will directly contact the second wall surface 120, thereby achieving the function of heat dissipation treatment for the battery body 100. After the refrigerant and the battery body 100 exchange heat for a certain period of time, the refrigerant flows to the liquid outlet pipe 400 and is discharged from the flow channel 220 through the liquid outlet pipe 400.

[0060] Understandably, the outlet pipe 400 can deliver the discharged refrigerant to the cooling device, which cools the refrigerant to reduce its temperature. The cooling device then delivers the refrigerant back to the flow channel 220 through the inlet pipe 300, thus achieving the circulation of the refrigerant to the battery body 100.

[0061] In some embodiments, the inlet pipe 300 is connected to the flow channel 220 along the first direction X or the second direction Y, and the outlet pipe 400 is connected to the flow channel 220 along the first direction X or the second direction Y; more specifically, the inlet pipe 300 and the outlet pipe 400 may be connected to the flow channel 220 simultaneously in the first direction X or in the second direction Y, or the inlet pipe 300 and the outlet pipe 400 may be connected to the flow channel 220 respectively in the first direction X and the second direction Y.

[0062] For example, when the inlet pipe 300 and the outlet pipe 400 are simultaneously connected to the flow channel 220 in the first direction X, the inlet pipe 300 and the outlet pipe 400 may be located on the same side of the battery body 100 along the first direction X, or the inlet pipe 300 and the outlet pipe 400 may be located on opposite sides of the battery body 100 along the first direction X.

[0063] When the inlet pipe 300 and the outlet pipe 400 are simultaneously connected to the flow channel 220 in the second direction Y, the inlet pipe 300 and the outlet pipe 400 can be located on the same side of the battery body 100 along the second direction Y, or the inlet pipe 300 and the outlet pipe 400 can be located on opposite sides of the battery body 100 along the second direction Y.

[0064] For example, when the inlet pipe 300 and the outlet pipe 400 are connected to the flow channel 220 in the first direction X and the second direction Y respectively, the inlet pipe 300 can be located on either side of the battery body 100 along the first direction X, and the outlet pipe 400 can be located on either side of the battery body 100 along the second direction Y. Alternatively, the inlet pipe 300 can be located on either side of the battery body 100 along the second direction Y, and the outlet pipe 400 can be located on either side of the battery body 100 along the first direction X.

[0065] In the embodiments of this application, see Figure 1 As shown, the inlet pipe 300 and the outlet pipe 400 are simultaneously connected to the flow channel 220 in the first direction X, and the inlet pipe 300 and the outlet pipe 400 are simultaneously located on the same side of the battery body 100 along the first direction X.

[0066] In some implementations, see Figure 1 , Figure 2 and Figure 3 As shown, the battery body 100 also has a third wall 140, which is adjacent to both the first wall 110 and the second wall 120, and extends along a third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y.

[0067] Furthermore, in the embodiments of this application, see... Figure 3 As shown, the heat sink 200 has an extension 230 on one side along the first direction X, and the extension 230 protrudes from the third wall surface 140 in the first direction X. A portion of the groove formed on the heat dissipation surface 210 extends to the extension 230.

[0068] Further, see Figure 1 As shown, both the inlet pipe 300 and the outlet pipe 400 are connected to the extension 230, and both the inlet pipe 300 and the outlet pipe 400 are connected to the groove on the extension 230.

[0069] In this embodiment, the refrigerant enters the groove on the extension 230 through the inlet pipe 300, thereby allowing the refrigerant to directly contact the second wall surface 120 through its flow in the groove, so as to achieve heat exchange between the refrigerant and the battery body 100. When the refrigerant flows into the groove of the extension 230 corresponding to the position of the outlet pipe 400, the refrigerant no longer contacts the second wall surface 120, thereby allowing the refrigerant to be discharged through the outlet pipe 400.

[0070] It is worth mentioning that, by setting the extension 230 on the heat sink 200, the flow channel 220 can be led out to the extension 230 in the first direction X. Since the extension 230 protrudes from the third wall surface 140 in the first direction X, it is convenient to install the liquid inlet pipe 300 and the liquid outlet pipe 400, thereby facilitating the connection between the liquid inlet pipe 300 and the liquid outlet pipe 400 and the flow channel 220, so as to facilitate the transportation of refrigerant.

[0071] In some implementations, see Figure 1 and Figure 4 As shown, the battery cell also includes a connecting plate 500. The connecting plate 500 has a first connecting portion 510 and a second connecting portion 520 that are connected to each other. The first connecting portion 510 and the second connecting portion 520 are kept perpendicular to each other, so that the connecting plate 500 is L-shaped as a whole.

[0072] In this embodiment, the connecting plate 500 is located on one side of the battery body 100 along the first direction X, and the position of the connecting plate 500 corresponds to the position of the extension 230. More specifically, see [link to relevant documentation]. Figure 1 and Figure 3 As shown, the connecting plate 500 is connected to the extension 230 through the first connecting part 510, and the connecting plate 500 is connected to the third wall surface 140 through the second connecting part 520. By connecting the connecting plate 500 to the extension 230 and the third wall surface 140 respectively, the connecting plate 500 can seal the groove on the extension 230.

[0073] Further, see Figure 4 As shown, a first through hole 511 and a second through hole 512 are provided on the first connecting portion 510 of the connecting plate 500. Both the first through hole 511 and the second through hole 512 are connected to the groove on the extension portion 230. The inlet pipe 300 and the outlet pipe 400 are both connected to the first connecting portion 510, with the inlet pipe 300 connected to the first through hole 511 and the outlet pipe 400 connected to the second through hole 512. This allows the inlet pipe 300 and the outlet pipe 400 to communicate with the groove on the extension portion 230, enabling them to connect with the flow channel 220.

[0074] Understandably, by connecting the connecting plate 500 to both the extension 230 and the third wall surface 140, the connecting plate 500 assists in the connection of the heat sink 200 to the second wall surface 120, improving the stability of the heat sink 200 mounted on the second wall surface 120. Simultaneously, the connecting plate 500 can seal the groove on the extension 230, preventing refrigerant leakage and improving the overall safety of the mechanism.

[0075] In some embodiments, the heat sink 200 is fixed to the second wall 120 of the battery body 100 by welding. However, in practical applications, the heat sink 200 can also be installed on the second wall 120 with the sealing element by bolt connection, snap connection, adhesive connection, etc., so that while the heat sink 200 is fixed on the second wall 120, the second wall 120 can cooperate with the heat sink 200, so that the groove forms a sealed flow channel 220.

[0076] Furthermore, in this embodiment, the first connecting portion 510 of the connecting plate 500 is fixed to the extension portion 230 by welding. However, in practical applications, the first connecting portion 510 can also be installed on the second wall surface 120 with the sealing element by bolt connection, adhesive connection, or other methods, so that while the first connecting portion 510 is fixed to the extension portion 230, the first connecting portion 510 can seal the groove on the extension portion 230. Similarly, the second connecting portion 520 of the connecting plate 500 is fixed to the third wall surface 140 by welding. However, in practical applications, the second connecting portion 520 can also be installed on the third wall surface 140 with the sealing element by bolt connection, adhesive connection, or other methods, so that while the second connecting portion 520 is fixed to the third wall surface 140, the second connecting portion 520 can cooperate with the first connecting portion 510 to seal the groove on the extension portion 230.

[0077] In some implementations, see Figure 3 and Figure 5 As shown, the flow channel 220 includes straight sections 221 and connecting sections 222, wherein there are multiple straight sections 221 and one or more connecting sections 222. In this embodiment, the multiple straight sections 221 extend in a long strip along a first direction X and are spaced apart along a second direction Y. Adjacent straight sections 221 are connected by connecting sections 222, so that refrigerant can flow between adjacent straight sections 221 through the connecting sections 222.

[0078] For example, see Figure 5 As shown in the embodiment of this application, the inlet pipe 300 can be connected to the straight section 221 via the extension 230, and the inlet pipe 300 can also be connected to the connecting section 222 via the extension 230; there is no particular limitation in this regard. Similarly, in the embodiment of this application, the outlet pipe 400 can be connected to the straight section 221 via the extension 230, and the outlet pipe 400 can also be connected to the connecting section 222 via the extension 230; there is no particular limitation in this regard.

[0079] Further, exemplarily, see Figure 5As shown in the embodiment of this application, the number of straight segments 221 is set to four, and two adjacent straight segments 221 are connected only through a connecting segment 222. Therefore, the number of connecting segments 222 is set to three.

[0080] In this embodiment, the refrigerant that enters the flow channel 220 through the inlet pipe 300 can flow in the straight section 221 and the connecting section 222, and at the same time come into contact with the second wall surface 120 for heat exchange. Finally, the refrigerant is discharged through the outlet pipe 400.

[0081] It should be noted that, in practical applications, depending on different needs, at least a number of straight segments 221 can remain parallel to each other, and at least a number of straight segments 221 can remain parallel to or at a certain angle to the first direction X while extending along the first direction X. This application embodiment does not make any special limitation on this.

[0082] In some implementations, see Figure 3 and Figure 5 As shown, the straight section 221 includes a first straight section 221a and a second straight section 221b, wherein, along the second direction Y, the first straight section 221a is closer to the first wall surface 110 than the second straight section 221b.

[0083] Furthermore, in this embodiment of the application, the inlet pipe 300 is connected to the second straight section 221b, and the outlet pipe 400 is connected to the first straight section 221a.

[0084] It is understood that, in this embodiment of the application, since the second direction Y is the height direction of the battery body 100, the first straight section 221a is closer to the first wall 110 than the second straight section 221b in the second direction Y. That is to say, the position of the liquid outlet pipe 400 connected to the first straight section 221a is higher than the position of the liquid inlet pipe 300 connected to the second straight section 221b.

[0085] For example, in this embodiment of the application, the refrigerant enters the second straight section 221b through the lower-positioned inlet pipe 300. Under the action of gravity, the refrigerant will gradually fill the straight section 221 and the connecting section 222 from bottom to top until the refrigerant enters the first straight section 221a. During the process of filling the first straight section 221a, the refrigerant is also discharged through the outlet pipe 400 connected to the first straight section 221a.

[0086] It is worth mentioning that, since the position of the liquid outlet pipe 400 is higher than that of the liquid inlet pipe 300, the refrigerant flows from bottom to top in the flow channel 220, and the refrigerant can fill the entire flow channel 220. This improves the uniformity of heat dissipation of the battery body 100 by the refrigerant in the second direction Y, thereby maintaining the consistency of the battery body 100 and improving the service life of the battery body 100.

[0087] In some embodiments, in order to improve the safety of the battery cell, at least a portion of the outer periphery of the battery body 100 and the heat sink 200 is covered with an insulating layer, thereby preventing short circuits in the battery body 100.

[0088] For example, in this embodiment of the application, the insulating layer covers the entire battery body 100 and the heat sink 200, so that while preventing short circuits in the battery body 100, it can also prevent the refrigerant in the flow channel 220 from leaking, thereby further improving safety.

[0089] Secondly, see Figure 6 As shown, this application provides a battery module that includes the aforementioned battery cells, and therefore possesses the corresponding technical effects and advantages.

[0090] Furthermore, in this embodiment of the application, the number of battery cells is set to multiple, and the multiple battery cells are arranged in close proximity along the third direction Z. It is worth mentioning that in this state, a heat sink 200 is necessarily sandwiched between two adjacent battery cells. The heat sink 200 is in contact with the corresponding two battery cells at the same time, so that one heat sink 200 can heat up two battery cells at the same time, which can better improve the heat dissipation efficiency of the battery module.

[0091] It should be noted that, in this embodiment, multiple battery cells are arranged in close proximity along the third direction Z. Therefore, the space in the third direction Z is limited. In this embodiment, the liquid inlet pipe 300 is connected to the flow channel 220 along the first direction X or the second direction Y, and the liquid outlet pipe 400 is connected to the flow channel 220 along the first direction X or the second direction Y. For example, in this embodiment, the liquid inlet pipe 300 and the liquid outlet pipe 400 are simultaneously connected to the flow channel 220 in the first direction X, and the liquid inlet pipe 300 and the liquid outlet pipe 400 are simultaneously located on the same side of the battery body 100 along the first direction X. This can better facilitate the installation of the liquid inlet pipe 300 and the liquid outlet pipe 400, thereby facilitating the connection between the liquid inlet pipe 300 and the liquid outlet pipe 400 and the flow channel 220, and achieving the function of facilitating the transportation of refrigerant.

[0092] In some embodiments, the battery module further includes a first main pipe 600, which is connected to the liquid inlet pipes 300 of at least a portion of the battery cells, so that the first main pipe 600 can simultaneously supply refrigerant to the liquid inlet pipes 300 of multiple battery cells, thereby enabling simultaneous heat dissipation of multiple battery cells and improving the heat dissipation efficiency of the battery module in this embodiment.

[0093] For example, in this embodiment of the application, the first main pipe 600 is connected to the liquid inlet pipes 300 of all the battery cells, thereby enabling the first main pipe 600 to supply refrigerant to all the liquid inlet pipes 300.

[0094] Furthermore, in this embodiment of the application, the battery module also includes a second main pipe 700, which is connected to the liquid outlet pipes 400 of at least a portion of the battery cells, so that the refrigerant in the liquid outlet pipes 400 of multiple battery cells can be discharged simultaneously through the second main pipe 700, thereby improving the heat dissipation efficiency of the battery module in this embodiment of the application.

[0095] For example, in this embodiment of the application, the second main pipe 700 is connected to the liquid outlet pipes 400 of all the battery cells, thereby enabling the refrigerant in the liquid outlet pipes 400 of all the battery cells to be discharged through the second main pipe 700.

[0096] It should be noted that, since the inlet pipe 300 and outlet pipe 400 in this embodiment are both located on the same side of the battery cell in the first direction X, the first main pipe 600 and the second main pipe 700 in this embodiment are also located on the same side of the battery cell.

[0097] Furthermore, in this embodiment of the application, the position of the outlet pipe 400 is higher than the position of the inlet pipe 300 in the second direction Y. Therefore, in this embodiment of the application, the position of the second main pipe 700 is higher than the position of the first main pipe 600.

[0098] In some implementations, see Figure 7 As shown, on the third direction Z, at least one side of the battery module is provided with a spacer 800. When the battery module is installed in the battery box, the spacer 800 can isolate and protect the battery module, and can also provide heat insulation and buffer against external impacts, thereby improving the stability and safety of the battery module.

[0099] For example, in this embodiment of the application, the battery module is provided with spacers 800 on both sides along the third direction Z.

[0100] In some implementations, see Figure 6 and Figure 7As shown, on the third direction Z, at least one side of the battery module is provided with an end plate 900, and the end plate 900 presses the separator 800 at the corresponding position onto the battery module. When the battery module is installed in the battery box, the end plate 900 can isolate and protect the battery module, and can provide heat insulation and a certain buffer against external impacts, thereby improving the stability and safety of the battery module.

[0101] For example, in this embodiment of the application, the battery module is provided with end plates 900 on both sides along the third direction Z.

[0102] Thirdly, this application provides a battery pack that includes the aforementioned battery cells or battery modules, thus possessing the corresponding technical effects and advantages.

[0103] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A single battery cell, characterized in that: include, The battery body (100) has a first wall (110) and a second wall (120) that are adjacent to each other, wherein the first wall (110) extends along a first direction and the second wall (120) extends along a second direction; a terminal post (111) is provided at the first wall (110). The heat sink (200) has a heat dissipation surface (210); a groove is provided on the heat dissipation surface (210), and the battery body (100) is attached to the heat dissipation surface (210) through the second wall surface (120) and the groove is sealed so that the groove forms a flow channel (220), and the flow channel (220) is used to contain the refrigerant.

2. The battery cell according to claim 1, characterized in that: It also includes an inlet pipe (300) and an outlet pipe (400), both of which are connected to the flow channel (220).

3. The battery cell according to claim 2, characterized in that: The inlet pipe (300) and the outlet pipe (400) are connected to the flow channel (220) along the first direction or the second direction.

4. The battery cell according to claim 3, characterized in that: The battery body (100) includes a third wall (140) extending in a third direction, the third wall (140) being adjacent to the first wall (110) and the second wall (120); The heat sink (200) has an extension (230) that protrudes from the third wall surface (140) along the first direction; a portion of the groove extends to the extension (230). Both the inlet pipe (300) and the outlet pipe (400) are connected to the extension (230) and communicate with the groove.

5. The battery cell according to claim 4, characterized in that: It also includes a connecting plate (500), which has a first connecting portion (510) and a second connecting portion (520) that are connected to each other, the first connecting portion (510) and the second connecting portion (520) being perpendicular to each other; The first connecting part (510) is connected to the extension part (230), and the second connecting part (520) is connected to the third wall surface (140); wherein the liquid inlet pipe (300) and the liquid outlet pipe (400) are both connected to the first connecting part (510) and communicate with the flow channel (220).

6. The battery cell according to any one of claims 2-5, characterized in that: The flow channel (220) includes multiple straight sections (221) and at least one connecting section (222); The plurality of straight segments (221) extend along the first direction and are spaced apart along the second direction; two adjacent straight segments (221) are connected by the connecting segment (222).

7. The battery cell according to claim 6, characterized in that: The straight segment (221) includes a first straight segment (221a) and a second straight segment (221b). Along the second direction, the first straight segment (221a) is closer to the first wall surface (110) than the second straight segment (221b). The inlet pipe (300) is connected to the second straight section (221b), and the outlet pipe (400) is connected to the first straight section (221a).

8. The battery cell according to any one of claims 1-5, 7, characterized in that: At least a portion of the outer periphery of the battery body (100) and the heat sink (200) is covered with an insulating layer.

9. The battery cell according to any one of claims 1-5, 7, characterized in that: The heat sink (200) is welded to the second wall surface (120).

10. A battery module, characterized in that: include, First main pipeline (600); Second main pipeline (700); One or more battery cells as described in any one of claims 1-9; The first main pipeline (600) is connected to the liquid inlet pipe (300) of one or more of the battery cells; the second main pipeline (700) is connected to the liquid outlet pipe (400) of one or more of the battery cells.

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