Battery and electric device

Abstract

The utility model relates to a battery and a power utilization device, and relates to the technical field of batteries, the battery comprises a plurality of single battery cells, a plurality of pole connecting pieces and a cooling member, each pole connecting piece comprises a first straight section, a first bending section and a second straight section which are sequentially connected along a first direction, the first straight section and the second straight section are respectively connected with the poles of two adjacent single battery cells; the cooling piece comprises a plurality of groups of cooling units which are connected with one another in the first direction, and each cooling unit comprises a third straight section, a second bent section and a fourth straight section which are sequentially connected in the first direction; the third straight section is matched with the first straight section, the fourth straight section is matched with the second straight section, and the second bent section is matched with the first bent section. According to the battery and the electric device, the cooling efficiency of the pole connecting piece can be improved, the temperature of the pole connecting piece is prevented from being too high, and the probability of safety accidents is reduced.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly relates to a battery and an electrical device. Background Art

[0002] In a battery, the pole columns between multiple single cells are connected by pole column connecting pieces to achieve the function of current transmission. During the current transmission process, the temperature of the pole column connecting pieces gradually increases, and the surface of the pole column connecting pieces is usually covered with cooling plates, which cool down the pole column connecting pieces. In the related art, both the cooling plates and the pole column connecting pieces are flat structures, and the contact area between them is small. Therefore, the cooling efficiency of the cooling plates for the pole column connecting pieces is low, which easily leads to too high a temperature of the pole column connecting pieces and causes safety accidents. Summary of the Utility Model

[0003] In order to solve the above technical problems, embodiments of the present application provide a battery and an electrical device, which can improve the cooling efficiency of the pole column connecting pieces, avoid too high a temperature of the pole column connecting pieces, and reduce the probability of safety accidents.

[0004] In a first aspect, a battery is provided, including:

[0005] Multiple single cells, assembled together along a first direction;

[0006] Multiple pole column connecting pieces, each pole column connecting piece including a first straight section, a first bent section, and a second straight section connected in sequence along the first direction, the first straight section and the second straight section being respectively connected to the pole columns of two adjacent single cells;

[0007] A cooling member, including multiple groups of cooling units connected to each other along the first direction, each cooling unit including a third straight section, a second bent section, and a fourth straight section connected in sequence along the first direction;

[0008] Wherein, multiple groups of the cooling units are in one-to-one correspondence and adaptation with multiple pole column connecting pieces, and the third straight section cooperates with the first straight section, the fourth straight section cooperates with the second straight section, and the second bent section cooperates with the first bent section.

[0009] According to the first aspect of the present application, both the first bent section and the second bent section are wavy structures.

[0010] According to the first aspect of the present application, the first bent section includes multiple first inclined sections connected at an angle in sequence, and the included angle A between two adjacent first inclined sections satisfies: 60°≤A≤160°;

[0011] The second bent section includes multiple second inclined sections that are sequentially connected at an angle. The included angle B between two adjacent second inclined sections satisfies: 60° ≤ B ≤ 160°.

[0012] According to the first aspect of the present application, both the first bent section and the second bent section are concave structures.

[0013] According to the first aspect of the present application, the first bent section includes a first connection section, a first transition section, and a second connection section that are sequentially connected at an angle. The inclination angle C between the first connection section and the first transition section, and the inclination angle D between the second connection section and the first transition section satisfy: 90° ≤ C ≤ °, 90° ≤ D ≤ °;

[0014] The second bent section includes a third connection section, a second transition section, and a fourth connection section that are sequentially connected at an angle. The inclination angle E between the third connection section and the second transition section, and the inclination angle F between the fourth connection section and the second transition section satisfy: 90° ≤ C ≤ 170°, 90° ≤ D ≤ 170°.

[0015] According to the first aspect of the present application, the third connection section and the second transition section are transitioned by a first arc; and / or, the fourth connection section and the second transition section are transitioned by a second arc.

[0016] According to the first aspect of the present application, the height of the pole of the single cell is G, and the distance in the height direction of the single cell from the bottom end of the first bent section to the top end of the first straight section is H. The G and the H satisfy: H < G.

[0017] According to the first aspect of the present application, the cooling member includes a first cooling body, a connecting body, and a second cooling body. Both the first cooling body and the second cooling body include multiple groups of the cooling units. The first cooling body and the second cooling body are spaced apart along a second direction. The multiple pole connection pieces adapted to the first cooling body connect the positive poles of the single cells, and the multiple pole connection pieces adapted to the second cooling body connect the negative poles of the single cells. The connecting body is disposed between the first cooling body and the second cooling body along the second direction, and opposite ends of the connecting body are respectively connected to the end of the first cooling body and the end of the second cooling body;

[0018] Wherein, one of the first cooling body and the second cooling body is provided with a liquid inlet, and the other is provided with a liquid outlet.

[0019] According to the first aspect of the present application, the battery further includes:

[0020] A heat conductor, which extends along the first direction and is disposed between the cooling member and a plurality of the pole connection pieces, and two opposite sides of the heat conductor are respectively adapted to the cooling member and the plurality of the pole connection pieces.

[0021] In a second aspect, an electrical device is further provided, including the battery as described in the previous embodiment.

[0022] In the battery and the electrical device provided by the embodiments of the present application, through the one-to-one correspondence and adaptation of multiple cooling units and a plurality of pole connection pieces, the third straight section cooperates with the first straight section, the fourth straight section cooperates with the second straight section, and the second bent section cooperates with the first bent section, so that the corresponding parts can be in contact and fit. In this way, compared with the solution in the related art where there are gaps between some parts of the cooling member and some parts of the pole connection pieces, it can effectively increase the contact area (i.e., the heat exchange area) between the cooling member and the plurality of pole connection pieces, thereby improving the cooling efficiency of the cooling member for the plurality of pole connection pieces, avoiding the overheating of the pole connection pieces, and reducing the probability of safety accidents. Description of the Drawings

[0023] By describing the embodiments of the present application in more detail in combination with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application, and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0024] Figure 1 It is a schematic structural diagram of a battery provided by an exemplary embodiment of the present application.

[0025] Figure 2 It is a schematic structural diagram of a cooling member provided by an exemplary embodiment of the present application.

[0026] Figure 3 It is a schematic structural diagram of a pole connection piece provided by an exemplary embodiment of the present application.

[0027] Figure 4 It is a schematic structural diagram of a cooling unit provided by an exemplary embodiment of the present application.

[0028] Figure 5 It is a schematic structural diagram of a pole connection piece provided by another exemplary embodiment of the present application.

[0029] Figure 6 It is a schematic structural diagram of a cooling unit provided by another exemplary embodiment of the present application.

[0030] Figure 7 It is a schematic structural diagram of a cooling unit provided by another exemplary embodiment of the present application.

[0031] Figure 8 Schematic structural diagram of a single battery cell provided by an exemplary embodiment of the present application.

[0032] Figure 9 Partial cross-sectional view of a battery provided by another exemplary embodiment of the present application.

[0033] Reference numerals: 100 - battery; 110 - single battery cell; 111 - terminal post; 120 - terminal post connecting piece; 121 - first straight section; 122 - first bent section; 1221 - first inclined section; 1222 - first connecting section; 1223 - first transition section; 1224 - second connecting section; 123 - second straight section; 130 - cooling member; 131 - cooling unit; 1311 - third straight section; 1312 - second bent section; 13121 - second inclined section; 13122 - third connecting section; 13123 - second transition section; 13124 - fourth connecting section; 1313 - fourth straight section; 1314 - first arc; 1315 - second arc; 132 - first cooling body; 1321 - liquid inlet; 133 - connecting body; 134 - second cooling body; 1341 - liquid outlet; 140 - heat conducting body. Detailed Description of the Embodiment

[0034] Next, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described herein.

[0035] Figure 1 Schematic structural diagram of a battery provided by an exemplary embodiment of the present application. As Figure 1 shown, the battery 100 provided by the embodiment of the present application may include a plurality of single battery cells 110 and a plurality of terminal post connecting pieces 120. The plurality of single battery cells 110 are arranged and assembled together along a first direction ( Figure 1 the direction represented by X in the figure), and the terminal posts 111 of two adjacent single battery cells 110 are connected with a terminal post connecting piece 120. The terminal post connecting piece 120 can be used to transfer current. It should be understood that heat will be generated during the process of the terminal post connecting piece 120 transferring current, resulting in a temperature rise.

[0036] Therefore, the battery 100 provided by the embodiment of the present application may further include a cooling member 130. The cooling member 130 cooperates with the plurality of terminal post connecting pieces 120. The cooling member 130 can perform heat exchange with the plurality of terminal post connecting pieces 120 to cool down the plurality of terminal post connecting pieces 120 and ensure that the plurality of terminal post connecting pieces 120 operate within a normal temperature range.

[0037] Figure 2The structural schematic diagram of the cooling member provided by an exemplary embodiment of the present application. As Figure 2 shown, the cooling member 130 includes multiple groups of cooling units 131 connected to each other in the first direction. The multiple groups of cooling units 131 can respectively cool multiple pole connection pieces 120, so that the operating temperatures of the multiple pole connection pieces 120 can all be maintained within the normal temperature range.

[0038] As Figure 2 shown, the cooling member 130 includes a first cooling body 132, a connecting body 133, and a second cooling body 134. Both the first cooling body 132 and the second cooling body 134 include multiple groups of cooling units 131. The multiple groups of cooling units 131 of the first cooling body 132 and the multiple groups of cooling units 131 of the second cooling body 134 are respectively used to cool different pole connection pieces 120. The connecting body 133 is disposed between the first cooling body 132 and the second cooling body 134 in the second direction ( Figure 2 the direction represented by Y in ), and the opposite ends of the connecting body 133 are respectively connected to the end of the first cooling body 132 and the end of the second cooling body 134.

[0039] It should be noted that the multiple pole connection pieces 120 cooled by the first cooling body 132 are used to connect the positive poles of multiple single cell cores 110, and the multiple pole connection pieces 120 cooled by the second cooling body 134 are used to connect the negative poles of multiple single cell cores 110. In this way, the first cooling body 132 and the second cooling body 134 can respectively cool the positive poles and negative poles of the single cell core 110.

[0040] As Figure 2 shown, the first cooling body 132 is provided with a liquid inlet 1321, and the second cooling body 134 is provided with a liquid outlet 1341. In practical applications, the coolant enters from the liquid inlet 1321, cools the multiple pole connection pieces 120 adapted to the first cooling body 132 and the positive poles of the multiple single cell cores 110, then enters the second cooling body 134 through the connecting body 133, and then cools the multiple pole connection pieces 120 adapted to the second cooling body 134 and the negative poles of the multiple single cell cores 110, and then is output from the liquid outlet 1341. It should be understood that the coolant output from the liquid outlet 1341 exchanges heat with an external device, and after the temperature is reduced, it can enter from the liquid inlet 1321 again and perform the cooling operation again. By analogy, the multiple pole connection pieces 120 and the poles 111 of the multiple single cell cores 110 can be cooled in multiple cycles.

[0041] In an embodiment, the first cooling body 132 can be provided with a liquid outlet 1341, and the second cooling body 134 can be provided with a liquid inlet 1321.

[0042] Figure 3The structural schematic diagram of the pole connection piece provided by an exemplary embodiment of the present application. As Figure 1 and Figure 3 shown, the pole connection piece 120 includes a first straight section 121, a first bending section 122, and a second straight section 123 that are sequentially connected along the first direction ( Figure 3 the direction represented by X in

[0043] Figure 4 The structural schematic diagram of the cooling unit provided by an exemplary embodiment of the present application. As Figure 4 shown, each group of cooling units 131 may include a third straight section 1311, a second bending section 1312, and a fourth straight section 1313 that are sequentially connected along the first direction ( Figure 4 the direction represented by X in

[0044] It should be noted that multiple groups of cooling units 131 are in one-to-one correspondence and adaptation with multiple pole connection pieces 120. The third straight section 1311 cooperates with the first straight section 121, the fourth straight section 1313 cooperates with the second straight section 123, and the second bending section 1312 cooperates with the first bending section 122. That is to say, multiple groups of cooling units 131 are adapted to the shapes of multiple pole connection pieces 120, and the corresponding parts can be in contact and fit. In this way, compared with the solution in the related art where there are gaps between some parts of the cooling member 130 and some parts of the pole connection piece 120, the solution of the present application can effectively increase the contact area (i.e., the heat exchange area) between the cooling member 130 and multiple pole connection pieces 120, thereby improving the cooling efficiency of the cooling member 130 for multiple pole connection pieces 120, avoiding the overheating of the pole connection piece 120, and reducing the probability of safety accidents.

[0045] As Figure 3 and Figure 4 shown, in an embodiment, both the first bending section 122 and the second bending section 1312 are wavy structures. It should be understood that compared with the flat structure in the related art, the wavy structure can increase the surface area of the first bending section 122 and the second bending section 1312. In this way, when the first bending section 122 and the second bending section 1312 cooperate, a larger heat exchange area can be obtained, thereby effectively improving the heat exchange efficiency.

[0046] Specifically, as Figure 3As shown, the first bent section 122 includes multiple first inclined sections 1221 that are sequentially connected at an angle, and the included angle between two adjacent first inclined sections 1221 is A. It should be understood that if the included angle A is too small, it will not only increase the processing difficulty, but also the tip formed at the connection of two adjacent first inclined sections 1221 is likely to damage the top wall of the single cell 110; if the included angle A is too large, the overall heat exchange efficiency of the first bent section 122 will not be significantly different from the flat heat exchange efficiency in the related art, and it cannot play an obvious role in improving the heat exchange efficiency. Therefore, it is necessary to limit the included angle A within a certain range, that is, the included angle A satisfies: 60° ≤ A ≤ 160°.

[0047] In one embodiment, the included angle A can be selected as 60°, 80°, 160°, etc.

[0048] As Figure 4 shown, the second bent section 1312 includes multiple second inclined sections 13121 that are sequentially connected at an angle, and the included angle between two adjacent second inclined sections 13121 is B. In order to achieve the purpose that the second bent section 1312 and the first bent section 122 are mutually adapted and increase the heat exchange area, the included angle B should be equal to the included angle A. Therefore, the value range of the included angle B should also be the same as the value range of the included angle A. That is, the included angle B satisfies: 60° ≤ B ≤ 160°.

[0049] In one embodiment, the included angle B can be selected as 60°, 80°, 160°, etc.

[0050] Figure 5 It is a schematic structural diagram of a pole connection piece provided by another exemplary embodiment of the present application. Figure 6 It is a schematic structural diagram of a cooling unit provided by another exemplary embodiment of the present application. As Figure 5 and Figure 6 shown, in one embodiment, both the first bent section 122 and the second bent section 1312 are concave structures. It should be understood that compared with the flat structure, the inner wall of the concave structure can be used as a heat exchange surface, thereby effectively increasing the heat exchange area; and compared with the wavy structure, the concave structure has lower processing difficulty and can effectively reduce the manufacturing cost.

[0051] In one embodiment, the inner cavity of the concave structure can be a pyramid shape, a prism shape, a cylinder shape, a cone shape, etc.

[0052] Specifically, as Figure 5As shown, the first bent section 122 includes a first connecting section 1222, a first transition section 1223, and a second connecting section 1224 that are sequentially connected at an angle. The inclination angle between the first connecting section 1222 and the first transition section 1223 is C, and the inclination angle between the second connecting section 1224 and the first transition section 1223 is D. It should be understood that if the included angle C and / or the included angle D is too small, it will not only increase the processing difficulty but also result in a narrow opening of the concave structure, which is not conducive to the cooperation between the second bent section 1312 and the first bent section 122 and affects the assembly efficiency. If the included angle C and / or the included angle D is too large, the overall heat exchange efficiency of the first bent section 122 will not be significantly different from the flat plate heat exchange efficiency in the related art, and it cannot play an obvious role in improving the heat exchange efficiency. Therefore, it is necessary to limit the included angle C and the included angle D within a certain range, that is, the included angle C and the included angle D satisfy: 90° ≤ C ≤ 170°, 90° ≤ D ≤ 170°.

[0053] In one embodiment, the included angle C can be selected as 90°, 120°, 170°, etc.

[0054] In one embodiment, the included angle D can be selected as 90°, 120°, 170°, etc.

[0055] As Figure 6 shown, the second bent section 1312 includes a third connecting section 13122, a second transition section 13123, and a fourth connecting section 13124 that are sequentially connected at an angle. The inclination angle between the third connecting section 13122 and the second transition section 13123 is E, and the inclination angle between the fourth connecting section 13124 and the second transition section 13123 is F. In order to achieve the foregoing purpose of mutual adaptation between the second bent section 1312 and the first bent section 122 and increase the heat exchange area, the included angle E should be equal to the included angle C, and the included angle F should be equal to the included angle D. Therefore, the value range of the included angle E should also be the same as the value range of the included angle C, and the value range of the included angle F should also be the same as the value range of the included angle D. That is, the included angle E and the included angle F satisfy: 90° ≤ E ≤ 170°, 90° ≤ F ≤ 170°.

[0056] In one embodiment, the included angle E can be selected as 90°, 120°, 170°, etc.

[0057] In one embodiment, the included angle F can be selected as 90°, 120°, 170°, etc.

[0058] Figure 7 is a schematic structural diagram of a cooling unit provided by another exemplary embodiment of the present application. As Figure 7As shown, the third connecting section 13122 and the second transition section 13123 are transitioned by a first arc 1314. In this way, the stress concentration problem occurring at the corner between the third connecting section 13122 and the second transition section 13123 can be improved, and the probability of fracture between the third connecting section 13122 and the second transition section 13123 can be reduced.

[0059] Similarly, the fourth connecting section 13124 and the second transition section 13123 are transitioned by a second arc 1315. In this way, the stress concentration problem occurring at the corner between the fourth connecting section 13124 and the second transition section 13123 can be improved, and the probability of fracture between the fourth connecting section 13124 and the second transition section 13123 can be reduced.

[0060] Figure 8 It is a schematic structural diagram of a single cell provided by an exemplary embodiment of the present application. Combining Figure 3 、 Figure 5 and Figure 8 , the height of the terminal 111 of the single cell 110 is G, and the distance from the bottom end of the first bent section 122 to the top end of the first straight section 121 in the height direction of the single cell 110 is H. G and H satisfy: H < G. In this way, after the terminal connecting piece 120 is assembled on the terminal 111, it can be ensured that there is a gap between the bottom end of the first bent section 122 and the top wall of the single cell 110, avoiding the bottom end of the first bent section 122 from contacting the top wall of the single cell 110, thereby preventing the top wall of the single cell 110 from being damaged by the bottom end of the first bent section 122.

[0061] Figure 9 It is a partial cross-sectional view of a battery provided by another exemplary embodiment of the present application. As Figure 9 shown, the battery 100 may further include a heat conductor 140. The heat conductor 140 extends along the first direction and is disposed between the cooling member 130 and the plurality of terminal connecting pieces 120. In this way, on the one hand, the heat conductor 140 can assist in realizing rapid heat exchange between the cooling member 130 and the plurality of terminal connecting pieces 120; on the other hand, the heat conductor 140 can play an insulating role between the cooling member 130 and the plurality of terminal connecting pieces 120, avoiding short circuit accidents.

[0062] It should be noted that the opposite sides of the heat conductor 140 are respectively adapted to the cooling member 130 and the plurality of terminal connecting pieces 120. In this way, the heat conductor 140 does not affect the heat exchange area between the cooling member 130 and the plurality of terminal connecting pieces 120, ensuring that there is a large heat exchange area between the cooling member 130 and the plurality of terminal connecting pieces 120, and effectively improving the heat exchange efficiency.

[0063] It should be noted that the foregoing "the two opposite sides of the heat conductor 140 are respectively adapted to the cooling member 130 and the plurality of pole connecting pieces 120" can be understood as follows: when both the first bending section 122 and the second bending section 1312 are wavy structures, both opposite sides of the heat conductor 140 are wavy structures; or when both the first bending section 122 and the second bending section 1312 are concave structures, both opposite sides of the heat conductor 140 are concave structures.

[0064] In one embodiment, the heat conductor 140 can be selected from a rubber layer, a silicone grease layer, etc.

[0065] The embodiment of the present application further provides an electrical device, which includes the battery 100 described in the foregoing embodiment and has all the functions of the battery 100. The beneficial effects of this electrical device can refer to the beneficial effects of the foregoing battery 100.

[0066] In one embodiment, the electrical device can be powered by the above battery 100. The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, a amusement device, an elevator and a lifting device, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy or an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator and a planer, etc.; the energy storage device can be an energy storage wall, a base station energy storage, a container energy storage, etc.; the amusement device can be a carousel, a drop tower, etc.

[0067] The basic principle of the present application has been described above in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purpose of illustration and easy understanding, rather than limitations, and the above details do not limit the present application to necessarily adopt the above specific details to implement.

[0068] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "comprising," "including," "having," etc. are open-ended terms that mean "including but not limited to" and can be used interchangeably with each other. The word "or" and "and" used herein refer to the phrase "and / or" and can be used interchangeably with it, unless the context clearly indicates otherwise. The phrase "such as" used herein refers to the phrase "such as but not limited to" and can be used interchangeably with it.

[0069] It should also be noted that in the devices, equipment, and methods of this application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of this application.

[0070] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0071] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A battery, characterized in that, Comprising: Multiple single - cell batteries (110), and the multiple single - cell batteries (110) are arranged and assembled together along a first direction; Multiple pole connection pieces (120), each of the pole connection pieces (120) includes a first straight section (121), a first bent section (122), and a second straight section (123) that are sequentially connected along the first direction, and the first straight section (121) and the second straight section (123) are respectively connected to the poles (111) of two adjacent single - cell batteries (110); A cooling member (130), including multiple groups of cooling units (131) connected to each other along the first direction, and the cooling unit (131) includes a third straight section (1311), a second bent section (1312), and a fourth straight section (1313) that are sequentially connected along the first direction; Wherein, the multiple groups of cooling units (131) are in one - to - one correspondence and adaptation with the multiple pole connection pieces (120), and the third straight section (1311) cooperates with the first straight section (121), the fourth straight section (1313) cooperates with the second straight section (123), and the second bent section (1312) cooperates with the first bent section (122).

2. The battery according to claim 1, wherein Both the first bent section (122) and the second bent section (1312) are wavy structures.

3. The battery according to claim 2, characterized in that, The first bent section (122) includes multiple first inclined sections (1221) sequentially connected at an angle, and the angle between two adjacent first inclined sections (1221) is A, and A satisfies: 60° ≤ A ≤ 160°; The second bent section (1312) includes multiple second inclined sections (13121) sequentially connected at an angle, and the angle between two adjacent second inclined sections (13121) is B, and B satisfies: 60° ≤ B ≤ 160°.

4. The battery according to claim 1, characterized in that, Both the first bent section (122) and the second bent section (1312) are concave structures.

5. The battery according to claim 4, characterized in that, The first bent section (122) includes a first connection section (1222), a first transition section (1223), and a second connection section (1224) sequentially connected at an angle. The inclination angle between the first connection section (1222) and the first transition section (1223) is C, and the inclination angle between the second connection section (1224) and the first transition section (1223) is D. C and D satisfy: 90° ≤ C ≤ 170°, 90° ≤ D ≤ 170°; The second bent section (1312) includes a third connection section (13122), a second transition section (13123), and a fourth connection section (13124) sequentially connected at an angle. The inclination angle between the third connection section (13122) and the second transition section (13123) is E, and the inclination angle between the fourth connection section (13124) and the second transition section (13123) is F. E and F satisfy: 90° ≤ E ≤ 170°, 90° ≤ F ≤ 170°.

6. The battery according to claim 5, characterized in that, A first arc (1314) is provided for transitioning between the third connecting section (13122) and the second transition section (13123); and / or, a second arc (1315) is provided for transitioning between the fourth connecting section (13124) and the second transition section (13123).

7. The battery according to any one of claims 1 to 6, characterized in that, The height of the terminal post (111) of the single cell (110) is G, and the distance in the height direction of the single cell (110) from the bottom end of the first bent section (122) to the top end of the first straight section (121) is H. G and H satisfy: H < G.

8. The battery according to any one of claims 1 to 6, characterized in that, The cooling member (130) includes a first cooling body (132), a connecting body (133), and a second cooling body (134). Both the first cooling body (132) and the second cooling body (134) include multiple groups of the cooling units (131). The first cooling body (132) and the second cooling body (134) are spaced apart along a second direction. The plurality of terminal post connecting tabs (120) adapted to the first cooling body (132) connect the positive terminal posts of the single cells (110). The plurality of terminal post connecting tabs (120) adapted to the second cooling body (134) connect the negative terminal posts of the single cells (110). The connecting body (133) is disposed between the first cooling body (132) and the second cooling body (134) along the second direction. Opposite ends of the connecting body (133) are respectively connected to the end of the first cooling body (132) and the end of the second cooling body (134); Wherein, one of the first cooling body (132) and the second cooling body (134) is provided with a liquid inlet (1321), and the other is provided with a liquid outlet (1341).

9. The battery according to any one of claims 1 to 6, characterized in that, The battery further includes: A heat conductor (140) extending along the first direction and disposed between the cooling member (130) and the plurality of terminal post connecting tabs (120). Opposite sides of the heat conductor (140) are respectively adapted to the cooling member (130) and the plurality of terminal post connecting tabs (120).

10. An electrical device, characterized in that, A battery comprising the battery according to any one of claims 1 to 9.

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