Battery monomer and battery assembly

Abstract

The utility model provides a battery monomer and a battery assembly, and relates to the field of batteries. The battery monomer comprises a shell, a top cover and a plurality of battery cells, the shell comprises a first accommodating part and two second accommodating parts, and a first accommodating space is formed in the first accommodating part; a second accommodating space communicated with the first accommodating space is formed in the second accommodating part; the two second containing parts are arranged in a spaced mode, and a containing cavity is formed between the two second containing parts. And a battery cell is arranged in each second accommodating space. The top cover is arranged on the side, away from the second containing part, of the first containing part so as to seal the first containing space. And the top cover is provided with a plurality of pole columns electrically connected with the battery cells. Limiting pieces are arranged on the sides, close to each other, of the two second containing parts so that the containing cavity can be detachably connected with a heat exchange structure. The battery assembly provided by the utility model adopts the battery monomer. According to the single battery and the battery assembly provided by the utility model, the technical problems of poor heat exchange function and non-uniform heat exchange of the battery core can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery monomer and a battery assembly. Background Art

[0002] With the popularization of new energy technologies, the application scope of batteries is becoming wider and wider. Each battery contains multiple cells. In the process of inputting or outputting electric energy, the cells will generate a lot of heat.

[0003] In the prior art, generally one battery contains two battery cells, and the liquid cooling assembly is generally arranged on a bottom surface of the battery to exchange heat with the battery. Therefore, for the battery cell, only the bottom surface can achieve heat dissipation, or it is arranged on one side of the battery. At this time, only one battery cell can be cooled, and the other battery cell cannot be cooled. The heat dissipation function is limited. If the battery or battery module is used for a long time, a high temperature will appear during use, or the temperature of the two battery cells will be uneven, affecting the battery safety and battery life. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the technical problems of poor heat exchange function and uneven heat exchange of battery cells in the prior art.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the utility model provides a battery cell, comprising:

[0007] The housing comprises a first accommodating portion and two second accommodating portions, wherein a first accommodating space is provided in the first accommodating portion; the two second accommodating portions are connected to the same side of the first accommodating portion, and a second accommodating space communicating with the first accommodating space is provided in the second accommodating portion; the two second accommodating portions are arranged at intervals, and an accommodating cavity is formed between the two second accommodating portions;

[0008] A plurality of battery cells, each of the second accommodating spaces is provided with at least one of the battery cells;

[0009] A top cover is arranged on a side of the first accommodating portion away from the second accommodating portion to close the first accommodating space; the top cover is provided with poles electrically connected to the plurality of battery cells;

[0010] Wherein, a limiting member is provided on one side where the two second accommodating portions are close to each other, so that the accommodating cavity can be detachably connected to a heat exchange structure.

[0011] The battery cell provided by the utility model has the following beneficial effects compared with the prior art:

[0012] In the battery cell, multiple cells are arranged inside the shell, and the heat exchange structure is accommodated by the accommodation cavity formed on the shell; when the heat exchange structure is accommodated in the accommodation cavity, the heat exchange structure can provide heat exchange and cooling effect to the cells in the two second accommodation spaces, which can achieve the purpose of configuring cooling and heat dissipation functions in the single battery and improve the heat exchange efficiency. At the same time, the two second accommodation spaces have the same heat exchange surface, so that heat exchange can be achieved for the cells in the two second accommodation spaces, and the temperature uniformity of the cells in the two second accommodation spaces can be improved to ensure the battery life. Based on this, the technical problems of poor heat exchange function and uneven temperature of the cells in the prior art can be improved.

[0013] Furthermore, due to the setting of the limiting member, the heat exchange structure can be detachably arranged in the accommodating cavity, which facilitates the disassembly and assembly of the heat exchange structure and reduces the difficulty of assembling and maintaining the battery cell.

[0014] Optionally, the stopper includes a first stopper, the first stopper is convexly disposed on a side of the second accommodating portion opposite to another second accommodating portion, and is disposed at an edge of the side away from a first side edge of the first accommodating portion and extending along the first side edge, and the first stopper is used to abut against the bottom surface of the heat exchange structure;

[0015] The two second accommodating portions are each provided with the first limiting member, and the two first limiting members are arranged opposite to each other and at an interval.

[0016] Optionally, the limiting member also includes a second limiting member, which is protruding from the side of the second accommodating portion opposite to the other second accommodating portion, and is arranged at the edge of the side close to the second side of the first accommodating portion. The second limiting member is provided on both second accommodating portions, and the two second limiting members are arranged opposite to each other and at intervals to support a side of the heat exchange structure adjacent to its bottom surface.

[0017] Optionally, the pole includes an external terminal, two internal terminals and a connecting terminal connecting the external terminal and the internal terminals; the external terminal is arranged on the outside of the top cover, the internal terminal is arranged on the inside of the top cover and is electrically connected to the external terminal, the two internal terminals respectively extend into the two second accommodating spaces, and the internal terminals are electrically connected to the battery cell, wherein the connecting terminal is attached to the bottom of the first accommodating portion, and the bottom of the first accommodating portion is attached to the heat exchange structure to exchange heat with the pole through the heat exchange structure.

[0018] Optionally, a liquid injection assembly is further provided on the top cover, a liquid inlet channel is provided in the liquid injection assembly, the liquid inlet channel forms a liquid inlet on the outside of the top cover, and two liquid outlets are formed on the inside of the top cover, and the two liquid outlets are respectively arranged corresponding to the two second accommodating spaces.

[0019] A battery assembly comprises a heat exchange structure and the above-mentioned battery monomer; the heat exchange structure is arranged in the accommodating cavity, and the heat exchange structure is supported by the limiting member.

[0020] The battery assembly provided by the utility model adopts the above-mentioned battery monomer. The beneficial effects of the battery assembly relative to the prior art are the same as the beneficial effects of the above-mentioned battery monomer relative to the prior art, which will not be repeated here.

[0021] Optionally, the heat exchange structure is installed in the accommodating cavity along a first direction from a narrow surface of the battery cell, and is abutted against the limiting member along the first direction and perpendicular to the first direction at the same time.

[0022] Optionally, an elastic member is provided on one side of the heat exchange structure close to the first accommodating portion, and when the heat exchange structure is installed in the accommodating cavity, the elastic member is compressed between the heat exchange structure and the first accommodating portion to provide a preload force perpendicular to the first direction.

[0023] Optionally, the elastic member is in sheet shape, and a protrusion on the elastic member forms a supporting portion, and the supporting portion is in line contact with the first accommodating portion;

[0024] The elastic member is disposed obliquely on the heat exchange structure, and its oblique direction is toward the first direction.

[0025] Optionally, the heat exchange structure comprises a liquid inlet, a liquid outlet and a connecting pipe arranged on one side, the connecting pipe is used to connect the liquid inlets and the liquid outlets of two adjacent heat exchange structures so that the two adjacent heat exchange structures are conductive, wherein the liquid inlet and the liquid outlet of the same heat exchange structure are arranged at both ends of the same side, and the liquid inlet and the liquid outlet of two adjacent heat exchange structures are arranged at the same end of two adjacent sides;

[0026] The side surface on which the connecting pipe is arranged is opposite to the side surface on which the heat exchange structure is installed in the accommodating cavity;

[0027] The heat exchange structure further includes flow channels connected to the liquid inlet and the liquid outlet respectively, and the flow channels are arranged in an S shape to cover the side surface of the heat exchange structure close to any second accommodating portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of an exploded structure of a battery assembly provided in an embodiment of the present application from a first perspective;

[0030] Figure 2 A schematic diagram of an exploded structure of a battery assembly provided in an embodiment of the present application from a second viewing angle;

[0031] Figure 3 This is a schematic structural diagram of a housing from a first viewing angle provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of the structure of the housing from a second viewing angle provided in an embodiment of the present application;

[0033] Figure 5 A schematic cross-sectional view of a battery assembly provided in an embodiment of the present application;

[0034] Figure 6 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0035] Figure 7 This is a schematic diagram of the internal structure of the heat exchange structure provided in an embodiment of the present application.

[0036] Icons: 10-battery assembly; 11-battery cell; 100-shell; 110-first accommodating portion; 111-first accommodating space; 120-second accommodating portion; 101-first side; 102-second side; 121-second accommodating space; 122-accommodating chamber; 123-first limiter; 124-second limiter; 300-top cover; 310-pole; 311-external terminal; 312-internal terminal; 313-connecting terminal; 320-liquid injection assembly; 321-liquid inlet; 322-liquid outlet; 400-heat exchange structure; 410-elastic member; 411-supporting portion; 420-connecting pipe; 430-flow channel. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0041] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0042] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0043] A battery assembly 10 is provided in an embodiment of the present application. The battery assembly 10 can store electric energy and, when applied to an electric device, can deliver electric energy to the electric device.

[0044] See also Figure 1 and Figure 2 In this embodiment, the battery assembly 10 includes a battery cell 11 and a heat exchange structure 400. The heat exchange structure 400 is arranged on the battery cell 11 to provide heat exchange for the battery cell 11. The heat exchange can be heating or cooling and can be configured as needed. Based on this, the heat exchange function of the battery cell 11 can be improved, and the technical problems of poor heat exchange function and uneven heat exchange of the battery cell 200 in the prior art can be improved. Furthermore, the battery assembly 10 using the battery cell 11 can also improve the technical problems of poor heat exchange function and uneven heat exchange of the battery cell 200 in the prior art.

[0045] The battery cell 11 includes a housing 100, a top cover 300 and a plurality of battery cells 200. Figure 3 and Figure 4The housing 100 includes a first accommodating portion 110 and two second accommodating portions 120. A first accommodating space 111 is provided in the first accommodating portion 110. The two second accommodating portions 120 are connected to the same side of the first accommodating portion 110. A second accommodating space 121 communicating with the first accommodating space 111 is provided in the second accommodating portion 120. The two second accommodating portions 120 are arranged at intervals, and an accommodating cavity 122 is formed between the two second accommodating portions 120. At least one battery cell 200 is provided in each second accommodating space 121. The top cover 300 is arranged on a side of the first accommodating portion 110 away from the second accommodating portion 120 to close the first accommodating space 111; a pole 310 electrically connected to a plurality of battery cells 200 is provided on the top cover 300. A limiting member is provided on the side where the two second accommodating portions 120 are close to each other, so that the accommodating cavity 122 can be detachably connected to a heat exchange structure 400.

[0046] As described above, in the battery cell 11, multiple battery cells 200 are concentrated inside the shell 100, and the heat exchange structure 400 is accommodated by the accommodating cavity 122 formed on the shell 100; when the heat exchange structure 400 is accommodated in the accommodating cavity 122, the heat exchange structure 400 can provide heat exchange to the battery cells 200 in the two second accommodating spaces 121, and the battery cells 200 in the two second accommodating spaces 121 have symmetrical heat exchange surfaces corresponding to the heat exchange structure 400, which directly contact the heat exchange structure 400 respectively, thereby improving the heat exchange efficiency and heat exchange uniformity of the battery cells 200 in the two second accommodating spaces 121. At the same time, the large surface of the battery cell in the second accommodating space 121 corresponds to the heat exchange structure 400 in the accommodating cavity 122, which can increase the heat exchange area and further improve the heat exchange efficiency.

[0047] Furthermore, due to the setting of the limiting member, the heat exchange structure 400 can be detachably arranged in the accommodating cavity 122, which facilitates the disassembly and assembly of the heat exchange structure 400 and reduces the difficulty of assembling and maintaining the battery cell 11.

[0048] It is worth noting that in this embodiment, the two second accommodating portions 120 are both provided with a limiting member on one side thereof close to each other, so as to provide a stable limiting effect on the heat exchange structure 400 and improve the installation stability of the heat exchange structure 400. Of course, in other embodiments of the present application, a limiting member may be provided on only one side of the second accommodating portions 120.

[0049] Optionally, in this embodiment, the stopper includes a first stopper 123, which is convexly disposed on the side of the second accommodating portion 120 relative to the other second accommodating portion 120, and is disposed on the side away from the edge of the first side edge 101 of the first accommodating portion 110 and extends along the first side edge 101, and the first stopper 123 is used to abut the bottom surface of the heat exchange structure 400. The first stopper 123 is disposed on both second accommodating portions 120, and the two first stoppers 123 are disposed opposite to each other and spaced apart. When the heat exchange structure 400 is loaded into the accommodating cavity 122, the first accommodating portion 110 and the stopper provide a limiting effect on the heat exchange structure 400 to ensure that the heat exchange structure 400 is stably assembled in the accommodating cavity 122.

[0050] Among them, during the assembly process, the heat exchange structure 400 can be installed into the accommodating cavity 122 from the side of the accommodating cavity 122 adjacent to the first accommodating portion 110, that is, the heat exchange structure 400 is installed from the narrow side of the battery cell. At this time, the heat exchange structure 400 can slide on the first stopper 123 until the heat exchange structure 400 is assembled in place, which can improve the installation stability. The first stopper 123 is continuously arranged along the first side 101, so as to facilitate the smooth installation of the heat exchange structure 400. The battery cell 11 is columnar, including a top surface provided with the first accommodating portion 110, a bottom surface opposite to the top surface, two opposite large surfaces and a narrow surface connecting the top surface and the bottom surface, the large surface and the narrow surface are arranged at intervals and the area of ​​the large surface is greater than the area of ​​the narrow surface. The heat exchange structure 400 is installed from the narrow side of the battery cell 11, so that the side area of ​​the accommodating cavity 122 formed in the second accommodating portion 120 corresponds to the large surface, so as to increase the heat exchange area of ​​the heat exchange structure 400 and the battery cell 200, and improve the heat exchange effect.

[0051] Furthermore, the stopper also includes a second stopper 124, which is convexly disposed on the side of the second accommodating portion 120 opposite to the other second accommodating portion 120, and is disposed on the side close to the edge of the second side edge 102 of the first accommodating portion 110. The two second accommodating portions 120 are each provided with a second stopper 124, and the two second stoppers 124 are disposed oppositely and at intervals to support a side surface of the heat exchange structure 400 adjacent to its bottom surface. It is worth noting that in this embodiment, reference Figure 4As shown, the second accommodating portion 120 has two first side edges 101 and two second side edges 102; the first accommodating portion 110 and the first stopper 123 are respectively arranged on the two first side edges 101; and the second stopper 124 is arranged on one of the second side edges 102, at this time, one of the second side edges 102 is vacant. During the assembly of the heat exchange structure 400, the heat exchange structure 400 can be loaded into the accommodating cavity 122 from the vacant second side edge 102; as the heat exchange structure 400 is loaded, the heat exchange structure 400 first slides on the first stopper 123, and the heat exchange structure 400 is mounted against the second stopper 124 of the other second side edge 102, and the assembly of the heat exchange structure 400 is completed. The second side 102 corresponds to the narrow side of the battery cell 11, and the first side 101 corresponds to the large side of the battery cell 11, so that the heat exchange structure 400 can be installed into the accommodating cavity 122 from the narrow side of the battery cell 10, so that the large side of the battery cell 200 corresponds to the heat exchange structure 400, thereby improving the overall heat exchange efficiency. The second limiting member 124 is arranged at intervals along the second side 102, so as to limit the heat exchange structure 400 at the end point of the installation direction, and prevent the heat exchange structure 400 and the battery cell 10 from being misaligned.

[0052] Among them, the first limit member 123 and the second limit member 124 jointly provide a limiting effect on the heat exchange structure 400. On the one hand, they can provide a positioning effect for the heat exchange structure 400 to ensure that the heat exchange structure 400 is accurately installed at the specified position to prevent the misalignment of the heat exchange structure 400 from affecting the heat exchange effect; on the other hand, they can also provide a limiting effect on the heat exchange structure 400 from multiple directions to achieve the purpose of improving the stability of the heat exchange structure 400.

[0053] It should be understood that in other embodiments of the present application, the first limiting member 123 may be provided alone or the second limiting member 124 may be provided alone, and the settings may be made as required.

[0054] Optionally, during the assembly process of the heat exchange structure 400, the heat exchange structure 400 is installed in the accommodating cavity 122 from the narrow side of the battery cell 10 along the first direction, and after the assembly is completed, the heat exchange structure 400 is simultaneously abutted against the stopper along the first direction and perpendicular to the first direction. The first direction refers to the direction from one of the second side edges 102 to the other second side edge 102, specifically, from the second side edge 102 without the second stopper 124 to the second side edge 102 with the second stopper 124; and the direction perpendicular to the first direction refers to the direction from the first accommodating portion 110 to the first stopper 123. The narrow side of the battery cell 10 refers to the side with a smaller area among the side faces of the battery cell 10.

[0055] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 5The pole 310 includes an external terminal 311, two internal terminals 312, and a connecting terminal 313 connecting the external terminal 311 and the internal terminal 312; the external terminal 311 is arranged on the outside of the top cover 300, the internal terminal 312 is arranged on the inside of the top cover 300 and is electrically connected to the external terminal 311, the two internal terminals 312 extend into the two second accommodating spaces 121 respectively, and the internal terminals 312 are electrically connected to the battery cell 200, wherein the connecting terminal 313 is attached to the bottom of the first accommodating portion 110, and the bottom of the first accommodating portion 110 is attached to the heat exchange structure 400, so as to exchange heat with the pole 310 through the heat exchange structure 400.

[0056] It is worth noting that in this embodiment, when two internal terminals 312 are provided, it means that the number of the second accommodating parts 120 is two, and each second accommodating space 121 accommodates a battery cell 200; the two internal terminals 312 are electrically connected to the battery cells 200 in the two second accommodating parts 120, respectively. It should be understood that in other embodiments, if the number of the second accommodating parts 120 is three, and each second accommodating space 121 accommodates a battery cell 200, at this time, the number of the internal terminals 312 can be set to three, and the three internal terminals 312 are electrically connected to the external terminals.

[0057] Furthermore, since the heat generated in the pole 310 is relatively high, the bottom wall of the first accommodating portion 110 is attached to the heat exchange structure 400, and the heat exchange function can be provided to the first accommodating portion 110 through the heat exchange structure 400. At this time, the bottom of the first accommodating portion 110 is attached by the connecting terminal 313 to ensure efficient heat exchange of the pole 310, thereby ensuring the heat exchange effect of the battery cell 11 and improving the safety and service life of the battery cell 11.

[0058] In addition, a liquid injection assembly 320 is also provided on the top cover 300, and a liquid inlet channel is provided in the liquid injection assembly 320. The liquid inlet channel forms a liquid inlet 321 on the outside of the top cover 300, and two liquid outlets 322 are formed on the inside of the top cover 300. The two liquid outlets 322 are respectively provided corresponding to the two second accommodating spaces 121. Through the provision of the liquid injection assembly 320, when liquid is injected, the liquid injection of the two second accommodating spaces 121 can be completed at the same time, thereby improving the liquid injection efficiency.

[0059] In this embodiment, please refer to Figure 1 and Figure 6In order to further improve the stability of the heat exchange structure 400, an elastic member 410 is provided on one side of the heat exchange structure 400 close to the first accommodating portion 110. When the heat exchange structure 400 is loaded into the accommodating cavity 122, the elastic member 410 is compressed between the heat exchange structure 400 and the first accommodating portion 110 to provide a preload perpendicular to the first direction. When the elastic member 410 is compressed, the elastic member 410 can provide a preload for the heat exchange structure 400 through its elastic restoring force, so that the heat exchange structure 400 can be stably supported between the first limiting member 123 and the first accommodating portion 110, thereby improving the overall stability of the heat exchange structure 400 and ensuring the heat exchange contact area between the heat exchange structure 400 and the first accommodating portion 110. At the same time, the friction between the heat exchange structure 400 and the first limiting member 123 can also be increased to prevent the heat exchange structure 400 from moving relative to the first limiting member 123.

[0060] Optionally, the elastic member 410 is in the form of a sheet, and a protrusion on the elastic member 410 forms a supporting portion 411, and the supporting portion 411 is in line contact with the first accommodating portion 110. It is worth noting that in the process of assembling the heat exchange structure 400, one side of the heat exchange structure 400 is first loaded into the accommodating cavity 122, and at the same time, the elastic member 410 is pressed between the first accommodating portion 110 and the heat exchange structure 400. In the process of pushing the heat exchange structure 400 into the accommodating cavity 122, the elastic member 410 slides on the bottom wall of the first accommodating portion 110. Based on this, the protrusion on the elastic member 410 to form the supporting portion 411 can reduce the contact area between the elastic member 410 and the first accommodating portion 110, reduce the sliding friction, and make it more convenient to load the heat exchange structure 400.

[0061] In addition, the elastic member 410 is tiltedly arranged on the heat exchange structure 400, and its tilting direction is toward the first direction, that is, toward the installation direction. It should be noted that two elastic members 410 are arranged on the heat exchange structure 400, and the two elastic members 410 are respectively arranged on both sides of the top surface of the heat exchange structure 400, and the two elastic members 410 are tilted away from the center of the top surface of the heat exchange structure 400. In the process of loading the heat exchange structure 400, the tilted end of one of the elastic members 410 is first pressed down and loaded into the accommodating cavity 122. At this time, the elastic member 410 loaded into the accommodating cavity 122 is in a compressed state, and the other elastic member 410 is in a free state; as the heat exchange structure 400 is loaded, until the elastic member 410 located on the outside enters the accommodating cavity 122; because when the elastic member 410 located on the outside enters the accommodating cavity 122, the part connected to the heat exchange structure 400 enters the accommodating cavity 122 first, it can automatically complete the compression through the extrusion of the first accommodating portion 110, and then complete the assembly of the heat exchange structure 400. After the heat exchange structure 400 is installed in the accommodating cavity 122 , the heat exchange structure 400 is prevented from being separated from the installation direction by the tilted elastic member 410 .

[0062] In this embodiment, please refer to Figure 7 The heat exchange structure 400 includes a liquid inlet 321, a liquid outlet 322 and a connecting pipe 420 arranged on a side surface, and the connecting pipe 420 is used to connect the liquid inlet 321 and the liquid outlet 322 of two adjacent heat exchange structures 400 so that the two adjacent heat exchange structures 400 are conductive, wherein the liquid inlet 321 and the liquid outlet 322 of the same heat exchange structure 400 are arranged at both ends of the same side surface, and the liquid inlet 321 and the liquid outlet 322 of two adjacent heat exchange structures 400 are arranged at the same end of two adjacent side surfaces. The side surface where the connecting pipe 420 is arranged is opposite to the side surface where the heat exchange structure 400 is installed into the accommodating cavity 122. The side surface where the heat exchange structure 400 is installed into the accommodating cavity 122 is the side surface where the heat exchange structure 400 is close to the accommodating cavity 122 when installed into the accommodating cavity 122. That is, the heat exchange structure 400 is installed into the accommodating cavity 122 from the side opposite to the side where the connecting pipe 420 is arranged, and the connecting pipe 420 is arranged on the side away from the installation direction, so as to avoid the interference of the connecting pipe 420 on the installation. The heat exchange structure 400 can be installed first, and then the connecting pipe 420 can be installed, or the connecting pipe 420 can be connected to the heat exchange structure and then installed into the accommodating cavity 122, so as to improve the installation convenience.

[0063] The heat exchange structure 400 further includes a flow channel 430 connected to the liquid inlet 321 and the liquid outlet 322, respectively, and the flow channel 430 is arranged in an S shape to cover the side of the heat exchange structure 400 close to any second accommodation portion 120. That is, the two opposite sides of the heat exchange structure 400 correspond to the sides of the two second accommodation portions 120, respectively, so as to improve the temperature uniformity of the battery cells of the two second accommodation portions 120.

[0064] In summary, in the battery cell 11 and the battery assembly 10 provided in the present embodiment, a plurality of battery cells 200 are concentrated inside the shell 100, and the heat exchange structure 400 is accommodated by the accommodating cavity 122 formed on the shell 100; when the heat exchange structure 400 is accommodated in the accommodating cavity 122, the heat exchange structure 400 can provide heat exchange to the battery cells 200 in the two second accommodating spaces 121, and can provide heat exchange efficiency and heat exchange effect, while improving the temperature uniformity of the battery cells in the two second accommodating spaces 121. Based on this, the technical problems of poor heat exchange and uneven heat exchange of the battery cells 200 in the prior art can be improved. Furthermore, due to the setting of the limiter, the heat exchange structure 400 can be detachably arranged in the accommodating cavity 122, which facilitates the disassembly and assembly of the heat exchange structure 400, and reduces the assembly difficulty and maintenance difficulty of the battery cell 11. Furthermore, by configuring the elastic member 410 , the recovery action of the elastic member 410 can cause the heat exchange structure 400 to be stably held between the first limiting member 123 and the first accommodating portion 110 , thereby achieving the purpose of improving the installation stability and heat exchange efficiency of the heat exchange structure 400 .

[0065] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A battery cell, characterized in that: include: A housing (100) comprises a first accommodating portion (110) and two second accommodating portions (120); a first accommodating space (111) is provided in the first accommodating portion (110); the two second accommodating portions (120) are connected to the same side of the first accommodating portion (110); a second accommodating space (121) communicating with the first accommodating space (111) is provided in the second accommodating portion (120); the two second accommodating portions (120) are arranged at intervals, and an accommodating cavity (122) is formed between the two second accommodating portions (120); A plurality of battery cells, each of the second accommodating spaces (121) being provided with at least one of the battery cells; A top cover (300) is arranged on a side of the first accommodating portion (110) away from the second accommodating portion (120) to close the first accommodating space (111); the top cover (300) is provided with poles (310) electrically connected to the plurality of battery cells; Wherein, a limiting member is provided on one side of the two second receiving portions (120) close to each other, so that the receiving cavity (122) can be detachably connected to a heat exchange structure.

2. The battery cell according to claim 1, characterized in that: The limiting member comprises a first limiting member (123), the first limiting member (123) being protrudingly arranged on a side surface of the second accommodating portion (120) opposite to another second accommodating portion (120), and being arranged on an edge of the side surface away from a first side edge of the first accommodating portion (110) and extending along the first side edge, the first limiting member (123) being used to abut against a bottom surface of the heat exchange structure (400); The two second accommodating portions (120) are each provided with the first limiting member (123), and the two first limiting members (123) are arranged opposite to each other and at a distance.

3. The battery cell according to claim 1, characterized in that: The limiting member also includes a second limiting member (124), the second limiting member (124) being protruding from a side surface of the second accommodating portion (120) opposite to another second accommodating portion (120), and being arranged at an edge of the side surface close to a second side edge of the first accommodating portion (110), the two second accommodating portions (120) being provided with the second limiting member (124), and the two second limiting members (124) being arranged opposite to each other and spaced apart so as to support a side surface of the heat exchange structure (400) adjacent to its bottom surface.

4. The battery cell according to claim 1, characterized in that: The pole (310) comprises an external terminal (311), two internal terminals (312) and a connecting terminal (313) connecting the external terminal (311) and the internal terminal (312); the external terminal (311) is arranged on the outside of the top cover (300), the internal terminal (312) is arranged on the inside of the top cover (300) and is electrically connected to the external terminal (311), the two internal terminals (312) respectively extend into the two second accommodating spaces (121), and the internal terminals (312) are electrically connected to the battery cell, wherein the connecting terminal (313) is attached to the bottom of the first accommodating portion (110), and the bottom of the first accommodating portion (110) is attached to the heat exchange structure (400) so as to exchange heat with the pole (310) through the heat exchange structure (400).

5. The battery cell according to claim 1, characterized in that: The top cover (300) is also provided with a liquid injection assembly (320), and a liquid inlet channel is provided in the liquid injection assembly (320), the liquid inlet channel forms a liquid inlet (321) on the outside of the top cover (300), and forms two liquid outlets (322) on the inside of the top cover (300), and the two liquid outlets (322) are respectively arranged corresponding to the two second accommodating spaces (121).

6. A battery assembly, characterized in that: It comprises a heat exchange structure (400) and a battery cell (10) as claimed in any one of claims 1 to 5; the heat exchange structure (400) is arranged in the accommodating cavity (122), and the heat exchange structure (400) is supported by the limiting member.

7. The battery assembly according to claim 6, characterized in that: The heat exchange structure (400) is installed in the accommodating cavity (122) from the narrow surface of the battery cell (10) along a first direction, and is abutted against the limiting member along the first direction and perpendicular to the first direction at the same time.

8. The battery assembly according to claim 7, characterized in that: An elastic member (410) is provided on one side of the heat exchange structure (400) close to the first accommodating portion (110); when the heat exchange structure (400) is installed in the accommodating cavity (122), the elastic member (410) is compressed between the heat exchange structure (400) and the first accommodating portion (110) to provide a preload force perpendicular to the first direction.

9. The battery assembly according to claim 8, characterized in that: The elastic member (410) is in sheet shape, and a protrusion on the elastic member (410) forms a supporting portion (411), and the supporting portion (411) is in line contact with the first accommodating portion (110); The elastic member (410) is arranged obliquely on the heat exchange structure (400), and its inclination direction faces the first direction.

10. The battery assembly according to claim 7, characterized in that: The heat exchange structure (400) comprises a liquid inlet, a liquid outlet and a connecting pipe arranged on one side, the connecting pipe being used to connect the liquid inlet and the liquid outlet of two adjacent heat exchange structures (400) so as to make the two adjacent heat exchange structures (400) conductive, wherein the liquid inlet and the liquid outlet of the same heat exchange structure (400) are arranged at two ends of the same side, and the liquid inlet and the liquid outlet of two adjacent heat exchange structures (400) are arranged at the same end of two adjacent side. The side surface on which the connecting pipe is arranged is installed into the side surface of the accommodating cavity (122) relative to the heat exchange structure (400); The heat exchange structure (400) further comprises flow channels connected to the liquid inlet and the liquid outlet respectively, and the flow channels are arranged in an S shape to cover the side surface of the heat exchange structure (400) close to any second accommodating portion (120).

Images