Battery and battery module

Abstract

The utility model relates to a battery and a battery module and relates to the technical field of batteries, the battery comprises a shell, a battery cell and an adapter piece, the shell comprises a shell body and a top cover, and the top cover covers the opening end of the shell body; the battery cell is arranged in the shell, and a positive pole lug is arranged on one side, facing the top cover in the Z direction, of the battery cell; the adapter plate is arranged between the top cover and the positive pole lug, and the two opposite sides of the adapter plate along the Z direction are respectively connected with the top cover and the positive pole lug; wherein the battery cell, the adapter plate and the top cover are conductors; or the battery cell, the adapter plate, the top cover and the shell are all conductors. According to the battery and the battery module, the problem of large temperature difference between the top and the bottom of the battery cell can be solved, and the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery and a battery module. BACKGROUND

[0002] During the working process of the square aluminum shell battery, it needs to be kept in a suitable temperature range. For this purpose, a cooling device is arranged in the battery, which is generally located at the bottom of the battery cell and is attached to the bottom wall of the battery cell to play a role in heat dissipation and cooling. Since the cooling device is closer to the bottom of the battery cell, a large temperature difference between the top of the battery cell and the bottom of the battery cell is easily caused, which easily causes the output power of the battery to be unstable and affects the service life of the battery. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the above technical problems, the embodiments of the present application provide a battery and a battery module, which can improve the problem of large temperature difference between the top and the bottom of the battery cell and prolong the service life of the battery.

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

[0005] A shell comprising a shell body and a top cover, the top cover being arranged at the open end of the shell body;

[0006] A battery cell arranged in the shell body, the battery cell being provided with a positive electrode tab on one side thereof facing the top cover in a Z direction, the Z direction being the height direction of the battery;

[0007] An adapter plate arranged between the top cover and the positive electrode tab, and the adapter plate being connected to the top cover and the positive electrode tab respectively on opposite sides thereof in the Z direction;

[0008] Wherein, the battery cell, the adapter plate and the top cover are all conductors; or,

[0009] The battery cell, the adapter plate, the top cover and the shell body are all conductors.

[0010] According to the first aspect of the present application, in the X direction, the length of the positive electrode tab is A, the length of the battery cell is B, the A and the B satisfy: A≥50%B, and the length of the adapter plate is greater than the length of the positive electrode tab, wherein the X direction is the length direction of the battery.

[0011] According to the first aspect of the present application, the battery further comprises:

[0012] A heat conductor arranged in the shell body, the heat conductor being arranged in extension in the Z direction, and the battery cell being provided with the heat conductor on both outer sides thereof in the X direction;

[0013] One or more heat conductors are arranged on both sides of the shell along the X direction.

[0014] According to the first aspect of the present application, the battery cell comprises a first winding core and a second winding core arranged adjacently along a Y direction, the Y direction being a width direction of the battery, the first winding core and the second winding core adopting an R-angle structure along two sides of the X direction, an accommodation area being formed between the R-angle structures of the first winding core and the second winding core, at least part of the heat conductor being accommodated in the accommodation area, a first gap being formed between the heat conductor and the first winding core, and a second gap being formed between the heat conductor and the second winding core.

[0015] One heat conductor is arranged in each of the accommodation areas.

[0016] According to the first aspect of the present application, the heat conductor abuts against the top cover and the shell respectively along opposite sides of the Z direction.

[0017] According to the first aspect of the present application, an inner wall of the shell is provided with a clamping groove extending along the Z direction, and a cross section of the heat conductor is in the shape of an isosceles triangle, at least part of any one side of the heat conductor being embedded in the clamping groove.

[0018] According to the first aspect of the present application, the heat conductor is in a hollow structure, and a heat-conducting medium is filled in an inner cavity of the heat conductor.

[0019] An inner wall of the heat conductor is paved with a plurality of granular bodies.

[0020] According to the first aspect of the present application, the battery further comprises a negative tab and a connecting body, the negative tab being arranged on the battery cell and being arranged opposite to the positive tab along the X direction, the connecting body being connected to the top cover and the negative tab respectively along opposite sides of the Z direction, and a length of the negative tab along the X direction being smaller than a length of the positive tab along the X direction.

[0021] The positive tab and the negative tab are arranged on the first winding core and the second winding core, two positive tabs being arranged opposite to each other along the Y direction, the adapter plate being connected to the two positive tabs, and two negative tabs being arranged opposite to each other along the Y direction, the connecting body being connected to the two negative tabs.

[0022] According to the first aspect of the present application, the adapter plate is welded to the top cover to form a target welding mark, the target welding mark being in the shape of an I-beam.

[0023] The second aspect further provides a battery module comprising the battery as described in the foregoing embodiments.

[0024] The battery and battery module provided in this application embodiment, when the battery cell, adapter plate, and top cover are all conductors, can improve the problem of excessively high bottom temperature of the battery cell by using a cooling device to cool and dissipate heat at the bottom of the battery cell. Furthermore, the adapter plate transfers heat generated at the top of the battery cell to the top cover. Because the top cover has a larger heat dissipation area, heat dissipation can be achieved more quickly, thus improving the problem of excessively high top temperature of the battery cell. Therefore, it can effectively improve the problem of large temperature difference between the top and bottom of the battery cell, ensuring stable battery output power and extending battery life. Additionally, when the battery cell, adapter plate, top cover, and casing are all conductors, the cooling device can cool and dissipate heat at the bottom of the battery cell, improving the problem of excessively high bottom temperature. Furthermore, the adapter plate transfers heat generated at the top of the battery cell to the top cover and casing. Because the top cover and casing have a larger heat dissipation area, heat dissipation can be achieved more quickly, thus improving the problem of excessively high top temperature of the battery cell. Therefore, it can effectively improve the problem of large temperature difference between the top and bottom of the battery cell, ensuring stable battery output power and extending battery life. Attached Figure Description

[0025] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0026] Figure 1 This is a schematic diagram of the structure of a battery provided for an exemplary embodiment of this application.

[0027] Figure 2 An exploded view of a battery provided for an exemplary embodiment of this application.

[0028] Figure 3 A top view of a battery cell and a heat conductor provided for an exemplary embodiment of this application.

[0029] Figure 4 A top view of the housing provided for an exemplary embodiment of this application.

[0030] Figure 5 A bottom view of the positive electrode tab, adapter plate, and top cover provided for an exemplary embodiment of this application.

[0031] Reference numerals: 100-Battery; 110-Outer casing; 111-Housing shell; 112-Top cover; 113-Positive terminal; 114-Negative terminal; 115-Slot; 116-Through hole; 120-Cell; 121-Positive tab; 122-Negative tab; 123-First winding core; 124-Second winding core; 125-Accommodation area; 126-First gap; 127-Second gap; 130-Adapter piece; 140-Heat conductor; 150-Target solder mark; 160-Connector. Detailed Implementation

[0032] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0033] Figure 1 This is a schematic diagram of the structure of a battery provided for an exemplary embodiment of this application. Figure 2 An exploded view of a battery provided for an exemplary embodiment of this application. Figure 1 and Figure 2 As shown, the battery 100 provided in this application embodiment may include a casing 110 and a battery cell 120. The casing 110 may include a housing 111 and a top cover 112. The housing 111 generally has an open end. The battery cell 120 can be assembled into the housing 111 through the open end of the housing 111. After the battery cell 120 is assembled into the housing 111, the top cover 112 can be placed on the open end of the housing 111. The top cover 112 and the housing 111 play a role in isolating and protecting the battery cell 120.

[0034] like Figure 1 and Figure 2 As shown, cell 120 is along the Z direction (reference). Figure 2 In the spatial rectangular coordinate system, the positive electrode tab 121 is provided on the side of the battery 100 facing the top cover 112 (the height direction of the battery 100). Correspondingly, the battery 100 may also include an adapter piece 130, which is disposed between the top cover 112 and the positive electrode tab 121. The adapter piece 130 connects the top cover 112 and the positive electrode tab 121 on opposite sides along the Z direction. The adapter piece 130 can be used to fix the positive electrode tab 121 and the top cover 112, thereby improving the connection strength between the positive electrode tab 121 and the top cover 112.

[0035] In one embodiment, the battery cell 120, the adapter plate 130, and the top cover 112 are all conductors. Thus, when a cooling device is installed at the bottom of the battery cell 120, on the one hand, the cooling device can cool and dissipate heat from the bottom of the battery cell 120, improving the problem of excessively high bottom temperature; on the other hand, the heat generated at the top of the battery cell 120 can be transferred to the top cover 112 through the adapter plate 130. The top cover 112 has a large heat dissipation area, enabling faster heat dissipation and improving the problem of excessively high top temperature of the battery cell 120. In other words, it can effectively improve the problem of a large temperature difference between the top and bottom of the battery cell 120, ensuring stable output power of the battery 100 and extending the battery 100's lifespan.

[0036] In one embodiment, the battery cell 120, the adapter plate 130, the top cover 112, and the housing 111 are all conductors. Thus, when a cooling device is installed at the bottom of the battery cell 120, on the one hand, the cooling device can cool and dissipate heat from the bottom of the battery cell 120, improving the problem of excessively high bottom temperature. On the other hand, the heat generated at the top of the battery cell 120 can be transferred to the top cover 112 and the housing 111 through the adapter plate 130. The top cover 112 and the housing 111 have a large heat dissipation area, enabling faster heat dissipation and improving the problem of excessively high top temperature of the battery cell 120. In other words, it can effectively improve the problem of a large temperature difference between the top and bottom of the battery cell 120, ensuring stable output power of the battery 100 and extending the service life of the battery 100.

[0037] It should be noted that, since the battery cell 120, the adapter piece 130, and the top cover 112 are all conductors, in order to prevent the top cover 112 from coming into contact with other charged objects and causing the battery 100 to short circuit, explode, or other safety problems, an insulating film is generally wrapped around the outer wall of the top cover 112 to improve the overall safety performance of the battery 100.

[0038] Similarly, when the battery cell 120, adapter 130, top cover 112, and casing 111 are all conductors, in order to prevent the top cover 112 and / or casing 111 from coming into contact with other charged objects, which could lead to short circuits, explosions, or other safety problems in the battery 100, an insulating layer is generally wrapped around the outer wall of the top cover 112 and casing 111 to improve the overall safety performance of the battery 100.

[0039] Figure 3 This is a top view of a battery cell and a heat conductor provided for an exemplary embodiment of this application. Figure 3 As shown, along the X direction (reference) Figure 3 The X direction and Figure 2In the spatial rectangular coordinate system (which can be the length direction of battery 100), the length of the positive electrode tab 121 is A, and the length of the cell 120 is B, where A and B satisfy: A ≥ 50% B. That is, compared with related technologies, this embodiment of the application specifically extends the length of the positive electrode tab 121 along the X direction. This effectively improves the heat conduction efficiency of the positive electrode tab 121. The extended positive electrode tab 121 can transfer heat from the top of the cell 120 to the top cover 112 and / or the outer casing 110 with higher heat conduction efficiency, effectively improving the heat dissipation efficiency of the top of the cell 120. Furthermore, after the targeted extension of the positive electrode tab 121 along the X direction, its cross-sectional area increases, which can effectively reduce heat generation.

[0040] like Figure 2 and Figure 3 As shown, along the X direction, the length of the adapter piece 130 is greater than the length of the positive electrode tab 121. That is, along the X direction, the adapter piece 130 can completely cover the positive electrode tab 121. This increases the contact area between the adapter piece 130 and the positive electrode tab 121, thereby increasing the connection strength between them and improving the heat conduction efficiency.

[0041] like Figure 2 As shown, the battery 100 may also include a negative electrode tab 122 and a connector 160. The negative electrode tab 122 is located on the side of the cell 120 facing the top cover 112 along the Z direction, and the negative electrode tab 122 and the positive electrode tab 121 are arranged at intervals relative to each other along the X direction. The connector 160 is connected to the top cover 112 and the negative electrode tab 122 on opposite sides along the Z direction, respectively.

[0042] It should be noted that, on the one hand, the connector 160 can enhance the connection strength between the top cover 112 and the negative electrode tab 122, and play a role in fixing the negative electrode tab 122; on the other hand, since the top cover 112 in this embodiment is a conductor, the surface of the connector 160 that is in contact with the top cover 112 is covered with an insulating film, and the part of the connector 160 that is in contact with the negative electrode tab 122 can be made of a conductor material. In this way, the current of the negative electrode tab 122 can be transmitted, and the negative electrode tab 122 can be prevented from being energized with the top cover 112, thereby avoiding the direct electrical connection between the positive electrode tab 121 and the negative electrode tab 122 through the top cover 112, and preventing the problem of short circuit in the battery cell 120.

[0043] like Figure 2 As shown, since the negative electrode tab 122 does not generate much heat during the reaction, the length of the negative electrode tab 122 along the X direction can be less than the length of the positive electrode tab 121 along the X direction, thereby reducing the space occupied by the negative electrode tab 122 and improving the compactness of the battery 100.

[0044] like Figure 2 and Figure 3 As shown, cell 120 includes the Y direction (reference). Figure 3 The Y direction and Figure 2 The space rectangular coordinate system can be the width direction of the battery 100. The first core 123 and the second core 124 are arranged adjacent to each other. The first core 123 and the second core 124 are provided with positive electrode tabs 121 and negative electrode tabs 122. The two positive electrode tabs 121 are arranged relatively spaced along the Y direction. The adapter piece 130 is connected to the two positive electrode tabs 121. The two negative electrode tabs 122 are arranged relatively spaced along the Y direction. The connector 160 is connected to the two negative electrode tabs 122.

[0045] It should be understood that the adapter 130 can be used to fix the two positive electrode tabs 121, and the heat generated by the two positive electrode tabs 121 can be transferred to the top cover 112 and / or the housing 111 through the adapter 130; the connector 160 can be used to fix the two negative electrode tabs 122, and the connector 160 can be used to prevent the two negative electrode tabs 122 from being directly electrically connected to the top cover 112.

[0046] like Figure 2 As shown, the battery 100 may further include a positive terminal 113, which is connected to the top cover 112. Thus, the positive terminal 113 can be electrically connected to the positive electrode tab 121 via the top cover 112 and the adapter plate 130. During heat transfer, the heat generated at the top of the cell 120 and the positive electrode tab 121 can be transferred to the top cover 112 via the adapter plate 130, and then more quickly transferred to the casing 111 via the top cover 112 and the positive terminal 113, effectively improving heat dissipation efficiency.

[0047] It should be noted that the positive electrode post 113 and the top cover 112 form an integrated structure, which can improve the structural strength between the positive electrode post 113 and the top cover 112, and facilitate processing, manufacturing and assembly.

[0048] like Figure 3 As shown, the battery 100 may also include a negative terminal post 114. The top cover 112 is provided with a through hole 116. A portion of the negative terminal post 114 passes through the through hole 116 and is connected to the connector 160. The current of the negative terminal tab 122 can be transmitted to the negative terminal post 114 through the connector 160, and then transmitted to other electrical components through the negative terminal post 114.

[0049] It should be noted that the outer surface of the portion of the negative terminal 114 that passes through the through hole 116 is also covered with an insulating film, as is the surface of the negative terminal 114 that contacts the top cover 112. This prevents the negative terminal 114 from being energized with the top cover 112, thereby preventing the positive terminal 113 and the negative terminal 114 from being directly electrically connected through the top cover 112, and preventing short circuits in the battery cell 120.

[0050] like Figure 2 and Figure 3 As shown, the battery 100 may also include a heat conductor 140, which is disposed inside the housing 111 and extends along the Z direction. The aforementioned heat conductor 140 is provided on both outer sides of the cell 120 along the X direction.

[0051] In practical applications, the heat generated at the top of the battery cell 120 can be transferred to the top of the heat conductor 140, and then along the heat conductor 140 to the bottom. The cooling device located at the bottom of the battery cell 120 can also dissipate heat from the bottom of the heat conductor 140. In other words, by using the heat conductor 140, the heat generated at the top of the battery 100 can be transferred to the bottom, enhancing the cooling effect of the cooling device on the battery cell 120, thereby further improving the problem of a large temperature difference between the top and bottom of the battery cell 120.

[0052] like Figure 3 As shown, one or more heat conductors 140 can be provided on each side of the housing 111 along the X direction. It should be understood that the more heat conductors 140 there are, the higher the heat conduction efficiency, and the faster the heat generated at the top of the battery cell 120 can be transferred to the cooling device at the bottom. In practical applications, the number of heat conductors 140 can be determined according to the remaining space inside the housing 111.

[0053] like Figure 3 As shown, both the first core 123 and the second core 124 adopt an R-angle structure on their opposite sides along the X direction. Taking the first core 123 as an example, the opposite sides of the first core 123 along the Y direction are connected by a circular arc, which can be considered as the R-angle structure of the first core 123.

[0054] It should be understood that, compared to the right-angle transition structure, the R-angle structure adopted by the first core 123 and the second core 124 can improve the problem of stress concentration. When the first core 123 and the second core 124 are squeezed, the R-angle structure can play a buffering role, effectively improving the problem of puncture caused by the compression of the first core 123 and the second core 124.

[0055] like Figure 3As shown, an accommodating region 125 is formed between the R-corner structures of adjacent first core 123 and second core 124. At least a portion of the heat conductor 140 is accommodated within the accommodating region 125. In this way, on the one hand, the area between the R-corner structures of the first core 123 and second core 124 can be fully utilized, improving the overall space utilization rate inside the housing 111; on the other hand, it can ensure that the heat conductor 140 is relatively close to the first core 123 and second core 124, thereby improving the heat conduction efficiency of the heat conductor 140, and further improving the heat dissipation efficiency of the top of the first core 123 and second core 124.

[0056] In one embodiment, the heat conductor 140 may be selected from structures such as cylinder, triangular prism, and square prism.

[0057] In one embodiment, the heat conductor 140 is selected as a triangular prism structure, which can better fit the shape of the receiving area 125, make it easier to assemble the heat conductor 140, and make full use of the space within the receiving area 125.

[0058] like Figure 3 As shown, a first gap 126 is formed between the heat conductor 140 and the first core 123. This can prevent the heat conductor 140 from directly contacting the first core 123, thereby preventing the first core 123 from short-circuiting.

[0059] Similarly, a second gap 127 is formed between the heat conductor 140 and the second core 124, which can prevent the heat conductor 140 from directly contacting the second core 124, thereby preventing the second core 124 from short-circuiting.

[0060] It should be noted that the widths of the first gap 126 and the second gap 127 can be set according to actual conditions. In this embodiment of the application, the widths of the first gap 126 and the second gap 127 are not specifically limited.

[0061] like Figure 3 As shown, considering the size of the accommodating area 125, a single heat conductor 140 is typically provided in each accommodating area 125. This ensures that the space of each accommodating area 125 is utilized and that a heat conductor 140 is present in each accommodating area 125 to conduct heat, thereby improving the overall heat dissipation efficiency. On the other hand, compared to providing multiple (two or more) heat conductors 140, providing only one heat conductor 140 in a single accommodating area 125 avoids the heat conductor 140 encroaching on the space of the battery cell 120, thus ensuring that the battery cell 120 has a larger energy density.

[0062] It should be noted that the heat conductor 140 is positioned on opposite sides along the Z-direction between the top cover 112 and the housing 111. In this way, the heat conductor 140 can quickly transfer heat from the top cover 112 to the bottom of the housing 111, allowing the cooling device to cool both the top cover 112 and the housing 111, preventing localized overheating of the top cover 112 and further mitigating the large temperature difference between the top and bottom of the battery cell 120.

[0063] It should be noted that the heat conductor 140 has a hollow structure, and the inner cavity of the heat conductor 140 is filled with a heat-conducting medium. The heat-conducting medium can transfer the heat received at the top of the heat conductor 140 (the heat from the top of the battery cell 120 and the top cover 112 will be transferred to the top of the heat conductor 140) to the bottom of the heat conductor 140, which facilitates rapid cooling by the cooling device and improves the problem of large temperature difference between the top and bottom of the battery cell 120.

[0064] In one embodiment, the heat-conducting medium can be gaseous, liquid, or the like.

[0065] In one embodiment, the heat-conducting medium may include water, ammonia, heat-conducting oil, etc.

[0066] It should be noted that the inner wall of the heat conductor 140 is lined with multiple particles, which can form a capillary structure on the inner wall of the heat conductor 140. These particles can form tiny channels through which the cooling medium can pass. Specifically, taking ammonia as the heat transfer medium as an example, the inner cavity of the heat conductor 140 is pre-filled with a portion of ammonia. Then, the inner cavity of the heat conductor 140 is evacuated. In actual operation, the top of the heat conductor 140 receives heat and reaches a higher temperature. The ammonia evaporates and absorbs heat at the top of the heat conductor 140. The cooling device cools the bottom of the heat conductor 140 through the bottom of the shell 111. The ammonia vapor condenses at the bottom of the heat conductor 140 and can then rise upwards through the tiny channels in the aforementioned capillary structure. Upon reaching the top of the heat conductor 140, it absorbs heat and evaporates again, continuing the cycle of evaporation, condensation, and evaporation. This achieves the continuous transfer of heat from the top of the heat conductor 140 to the bottom of the heat conductor 140.

[0067] It should be noted that, for the capillary structure formed by multiple particles on the inner wall of the heat conductor 140, on the one hand, the multiple small channels in the capillary structure can provide an upward force for the cooling medium, transporting the cooling medium from the bottom to the top of the heat conductor 140; on the other hand, the capillary structure has a large surface area, and the cooling medium can absorb more heat during the process of passing through the capillary structure, thereby improving the heat dissipation efficiency.

[0068] Figure 4 A top view of the housing provided for an exemplary embodiment of this application. Figure 2 and Figure 4As shown, the inner wall of the housing 111 is provided with a slot 115, which extends along the Z direction. At least a portion of the heat conductor 140 can be embedded in the slot 115. In this way, the slot 115 can limit the heat conductor 140, restricting its movement within the housing 111, and preventing it from contacting the first core 123 and / or the second core 124.

[0069] like Figure 2 and Figure 4 As shown, the heat conductor 140 has an isosceles triangle cross section, and at least a portion of any one side is embedded in the slot 115. This improves the engagement stability between the heat conductor 140 and the slot 115, making it less likely for the heat conductor 140 to detach from the slot 115. In addition, during assembly, the heat conductor 140 can be inserted into the slot 115 along the Z direction, making the assembly process simple and convenient and improving the assembly efficiency of the heat conductor 140.

[0070] Figure 5 A bottom view of the positive electrode tab, adapter plate, and top cover provided for an exemplary embodiment of this application. Figure 5 As shown, the adapter piece 130 is welded to the top cover 112 (e.g., by laser welding) to form the target solder mark 150.

[0071] It should be noted that, during the welding process, considering the relatively long length of the adapter piece 130, a segmented welding method was adopted to reduce stress.

[0072] like Figure 5 As shown, the target solder mark 150 is in the shape of an I-beam. In this way, the target solder mark 150 can avoid the positive electrode tab 121, and at the same time, it can weld the two sides and the middle of the adapter piece 130 along the X direction, ensuring the structural strength of the adapter piece 130 after welding with the top cover 112, and preventing the adapter piece 130 from detaching from the top cover 112.

[0073] In one embodiment, the positive electrode tab 121 and the adapter piece 130 can be connected and fixed by ultrasonic welding, and the negative electrode tab 122 and the connector 160 can also be connected and fixed by ultrasonic welding.

[0074] In one embodiment, the battery 100 has a length of 220 mm along the X direction, a length of 46 mm along the Y direction, and a length of 105 mm along the Z direction; the first core 123 has a length of 20.4 mm along the Y direction, and the second core 124 has a length of 20.4 mm along the Y direction; the positive electrode tab 121 has a length of 120 mm along the X direction; the adapter piece 130 has a length of 125 mm along the X direction; the target solder mark 150 may include three sub-solder marks with a length of 30 mm, and the three sub-solder marks are spaced apart; the heat conductor 140 has a length of 102.7 mm along the Z direction, and the base length of the isosceles triangle of the cross-section of the heat conductor 140 is 7 mm.

[0075] This application also provides a battery module, which includes the battery 100 as described in the previous embodiment and has all the functions of the battery 100. The beneficial effects of this battery module can be referred to the beneficial effects of the aforementioned battery 100.

[0076] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0077] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0078] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0079] 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 be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0080] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A battery, characterized in that, include: The outer casing (110) includes a housing (111) and a top cover (112), the top cover (112) covering the open end of the housing (111); A battery cell (120) is disposed inside the housing (111), and a positive electrode tab (121) is provided on the side of the battery cell (120) facing the top cover (112) along the Z direction; An adapter piece (130) is disposed between the top cover (112) and the positive electrode tab (121), and the adapter piece (130) connects the top cover (112) and the positive electrode tab (121) on opposite sides along the Z direction, where the Z direction is the height direction of the battery (100); Wherein, the battery cell (120), the adapter plate (130), and the top cover (112) are all conductors; or, The battery cell (120), the adapter plate (130), the top cover (112), and the housing (111) are all conductors.

2. The battery according to claim 1, characterized in that, Along the X direction, the length of the positive electrode tab (121) is A, the length of the battery cell (120) is B, and A and B satisfy: A≥50%B, and the length of the adapter piece (130) is greater than the length of the positive electrode tab (121); wherein, the X direction is the length direction of the battery (100).

3. The battery according to claim 2, characterized in that, The battery also includes: A heat conductor (140) is disposed inside the housing (111). The heat conductor (140) extends along the Z direction, and the heat conductor (140) is disposed on both outer sides of the battery cell (120) along the X direction. Along the X direction, one or more heat conductors (140) are respectively provided on both sides of the housing (111).

4. The battery according to claim 3, characterized in that, The battery cell (120) includes a first core (123) and a second core (124) arranged adjacent to each other along the Y direction, where the Y direction is the width direction of the battery (100). The first core (123) and the second core (124) adopt an R-angle structure on both sides along the X direction. An accommodating region (125) is formed between the R-angle structures of adjacent first cores (123) and second cores (124). At least a portion of the heat conductor (140) is accommodated in the accommodating region (125). A first gap (126) is formed between the heat conductor (140) and the first core (123), and a second gap (127) is formed between the heat conductor (140) and the second core (124). A heat conductor (140) is disposed within a single accommodating region (125).

5. The battery according to claim 3, characterized in that, The heat conductor (140) abuts against the top cover (112) and the housing (111) on opposite sides along the Z direction.

6. The battery according to claim 3, characterized in that, The inner wall of the housing (111) is provided with a slot (115) which extends along the Z direction. The heat conductor (140) has an isosceles triangle cross section, and at least a portion of any one side is embedded in the slot (115).

7. The battery according to claim 3, characterized in that, The heat conductor (140) has a hollow structure, and the inner cavity of the heat conductor (140) is filled with a heat-conducting medium; The inner wall of the heat conductor (140) is covered with multiple particles.

8. The battery according to claim 4, characterized in that, The battery also includes a negative electrode tab (122) and a connector (160). The negative electrode tab (122) is disposed on the cell (120) and is spaced apart from the positive electrode tab (121) along the X direction. The connector (160) is connected to the top cover (112) and the negative electrode tab (122) on opposite sides along the Z direction. The length of the negative electrode tab (122) along the X direction is less than the length of the positive electrode tab (121) along the X direction. The first core (123) and the second core (124) are each provided with a positive electrode tab (121) and a negative electrode tab (122). The two positive electrode tabs (121) are arranged at intervals relative to each other along the Y direction. The adapter piece (130) is connected to the two positive electrode tabs (121). The two negative electrode tabs (122) are arranged at intervals relative to each other along the Y direction. The connector (160) is connected to the two negative electrode tabs (122).

9. The battery according to any one of claims 1 to 8, characterized in that, The adapter piece (130) is welded to the top cover (112) to form a target solder mark (150), which is I-shaped.

10. A battery module, characterized in that, Includes the battery as described in any one of claims 1-9.

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