Battery, battery pack and electric equipment

Abstract

The utility model discloses a battery, a battery pack and electric equipment, and belongs to the technical field of batteries. Comprising a shell, a top cover and a plurality of battery cells, a sealed cavity is defined by the shell and the top cover, and the battery cells are arranged in the sealed cavity; the shell comprises a body and at least one heat dissipation piece, the at least one heat dissipation piece is sequentially arranged at intervals so as to divide the sealed cavity into a plurality of containing spaces sequentially arranged in the first direction, the containing spaces are communicated with one another, and the containing spaces and the battery cells are arranged in a one-to-one correspondence mode. As the shell is provided with the heat dissipation piece, the heat dissipation piece does not need to be arranged in the shell to realize heat dissipation, so that the space in the sealed cavity is enlarged, the enlarged space can be converted into a battery cell space, and the battery has the beneficial effects of improving the energy density and the space utilization rate of the battery.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery, a battery pack and an electrical device. Background Art

[0002] Batteries are currently widely used in the fields of power and energy storage. As the requirements for batteries in the above fields increase, the requirements for battery energy density and space utilization are also higher.

[0003] In the prior art, two single-cell stacks are usually placed on both sides of the cover plate after completion, and the single-cell battery is connected to the cover plate in turn by welding, and then the pole core is folded and buckled into the cover plate, and finally inserted into the square aluminum shell to complete the sealing welding of the cover plate and the square shell. The two single-cell battery shares the same aluminum shell and electrolyte.

[0004] However, due to the symmetrical structural design, the maximum number of cells that can be placed is two, and there is an upper limit in the thickness direction of the battery. In addition, the structural design of the above-mentioned cells does not take into account the heat generation of the cells during the charge and discharge cycle, and can only rely on the module heat dissipation cooling system after the subsequent cell assembly to achieve cooling, so there is an upper limit in the length direction. The above problems have greatly restricted the battery energy density and space utilization. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a battery, a battery pack and an electrical device that can solve the problems of low energy density and space utilization of batteries in the prior art.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a battery, wherein the battery has a first direction, a second direction and a third direction, the first direction and the second direction intersect, and the third direction is perpendicular to the plane where the first direction and the second direction are located; the battery comprises a shell, a top cover and a plurality of battery cells, the shell and the top cover enclose a sealed cavity, and the plurality of battery cells are arranged in the sealed cavity; the shell comprises a main body and at least one heat dissipation member to separate the sealed cavity into a plurality of accommodating spaces arranged in sequence along the first direction, the plurality of accommodating spaces are interconnected, and the accommodating spaces and the battery cells are arranged in a one-to-one correspondence.

[0008] In the embodiment of the present application, the battery adopts a single opening, the top cover is connected to the shell along the third direction Z to form a sealed cavity, and multiple battery cells are arranged in the sealed cavity. Specifically, the battery cell can be a solid battery cell, and the battery cell can also be a battery cell wrapped with a diaphragm but the electrolyte can flow in the sealed cavity. The electrolyte is not limited in this embodiment. The shell includes a body and at least one heat sink, at least one heat sink is arranged in the sealed cavity, at least one heat sink and the body are fixedly connected, or at least one heat sink and the body are an integral part, and this embodiment does not limit this. Specifically, when the number of heat sinks is two or more, two or more heat sinks are arranged in sequence in the sealed cavity to separate the sealed cavity into a plurality of accommodation spaces arranged in sequence along the first direction X, and the accommodation space is set to provide a placement space for the battery cell, and the accommodation space and the battery cell are set one by one. Further, the multiple accommodation spaces are interconnected, and when the battery cell is a non-solid battery cell, the electrolyte can flow in the multiple accommodation spaces, so that the electrolyte of multiple batteries can be shared. In the embodiment of the present application, since the shell itself has a heat sink, there is no need to set up another heat sink in the shell to achieve heat dissipation, thereby increasing the space in the sealed cavity, and the increased space can be converted into battery cell space, which has the beneficial effect of improving the battery energy density and space utilization.

[0009] Optionally, the heat sink is provided with a heat dissipation channel, which extends along the second direction; the body includes a first surface and a second surface arranged opposite to each other along the second direction; the first surface and the second surface are both provided with the through holes, and the through holes on the first surface and the through holes on the second surface are arranged correspondingly and oppositely; one end of the heat dissipation channel is connected to the through holes on the first surface, and the other end of the heat dissipation channel is connected to the through holes on the second surface, so that the heat dissipation channel is connected to the outside world.

[0010] Optionally, the top cover is connected to one end of the shell along the first direction, the heat sink has a first preset interval with the top cover along the third direction, and the heat sink has a second preset interval with the shell along the third direction.

[0011] Optionally, a width of the heat dissipation channel along the first direction is H, wherein 1 mm≤H≤2 mm.

[0012] Optionally, the battery cell comprises a positive electrode tab and a negative electrode tab, and an orthographic projection of at least one of the positive electrode tab and the negative electrode tab on the body along the second direction is S-shaped.

[0013] Optionally, the battery cell further includes a positive electrode post lead-out piece and a negative electrode post lead-out piece; the positive electrode post lead-out piece includes a first planar portion and a first protruding portion, the first planar portion is connected to the positive electrode lug, the first protruding portion is arranged on a side of the first planar portion away from the positive electrode lug, and the first protruding portion protrudes from the first planar portion along the third direction; the negative electrode post lead-out piece includes a second planar portion and a second protruding portion, the second planar portion is connected to the negative electrode lug, the second protruding portion is arranged on a side of the second planar portion away from the negative electrode lug, and the second protruding portion protrudes from the second planar portion along the third direction.

[0014] Optionally, the top cover includes a cover plate and an insulating member, the insulating member is arranged on a side of the cover plate close to the battery cell; the top cover is provided with a plurality of first connection holes and a plurality of second connection holes, the insulating member is provided with a plurality of third connection holes and a plurality of fourth connection holes, the first connection holes and the third connection holes are arranged in a one-to-one correspondence, and the second connection holes and the fourth connection holes are arranged in a one-to-one correspondence; the first protrusion passes through the third connection hole and the second connection hole in sequence, and the second protrusion passes through the fourth connection hole and the third connection hole in sequence; wherein the number of the first connection holes, the number of the second connection holes, the number of the third connection holes, and the number of the fourth connection holes are all the same as the number of the battery cells.

[0015] Optionally, the battery cell further includes a positive outer pole and a negative outer pole, and the positive outer pole and the negative outer pole are both arranged on a side of the cover plate away from the insulating member; wherein the positive outer pole is sleeved on the first protrusion, and the negative outer pole is sleeved on the second protrusion.

[0016] Optionally, the battery further comprises a first fixing member and a second fixing member, a first groove and a second groove are provided on a side of the cover plate facing away from the insulating member, the first fixing member is clamped in the first groove, and the second fixing member is clamped in the second groove; the first fixing member is provided with a first limiting groove, and the second fixing member is provided with a second limiting groove, the positive outer pole is clamped in the first limiting groove, and the negative outer pole is clamped in the second limiting groove.

[0017] In a second aspect, the present application also provides a battery pack, comprising the battery as described above.

[0018] In a third aspect, the present application also provides an electrical device, including the battery pack as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the structure of a battery in an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the structure of a battery at another angle in an embodiment of the present application;

[0021] Figure 3 is a schematic structural diagram of a housing in an embodiment of the present application;

[0022] Figure 4 In the embodiment of this application Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 is a schematic diagram of a partial explosion structure of a battery in an embodiment of the present application;

[0024] Figure 6 In the embodiment of this application Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 7 is a schematic diagram of a top view of a battery in an embodiment of the present application;

[0026] Figure 8 In the embodiment of this application Figure 7 Schematic diagram of the cross-sectional structure at CC in the middle.

[0027] Description of reference numerals:

[0028] 10. Shell; 11. Body; 111. Through hole; 112. First surface; 113. Second surface; 12. Heat sink; 121. Heat dissipation channel; 20. Top cover; 21. Cover plate; 211. First connection hole; 212. Second connection hole; 213. First groove; 214. Second groove; 22. Insulator; 221. Third connection hole; 222. Fourth connection hole; 30. Cell; 31. Positive electrode ear; 32. Negative electrode tab; 33. Positive electrode lead-out piece; 34. Negative electrode lead-out piece; 331. First planar portion; 332. First protrusion; 341. Second planar portion; 342. Second protrusion; 35. Positive outer electrode; 36. Negative outer electrode; 40. First fixing piece; 41. First limiting groove; 50. Second fixing piece; 51. Second limiting groove; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0031] The battery and electrical equipment provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0032] See also Figures 1 to 8 The embodiment of the present application provides a battery, the battery has a first direction X, a second direction Y and a third direction Z, the first direction X and the second direction Y intersect, and the third direction Z is perpendicular to the plane where the first direction X and the second direction Y are located; it includes a shell 10, a top cover 20 and a plurality of battery cells 30, the shell 10 and the top cover 20 are enclosed to form a sealed cavity, and the plurality of battery cells 30 are arranged in the sealed cavity; the shell 10 includes a body 11 and at least one heat dissipation member 12, so as to separate the sealed cavity into at least two accommodating spaces arranged in sequence along the first direction X, the at least two accommodating spaces are interconnected, and the accommodating spaces and the battery cells 30 are arranged one by one.

[0033] In the embodiment of the present application, the battery adopts a single opening, the top cover 20 is connected to the shell 10 along the third direction Z to form a sealed cavity, and a plurality of battery cells 30 are arranged in the sealed cavity. Specifically, the battery cell 30 can be a solid battery cell, or the battery cell 30 can be a battery cell wrapped with a diaphragm but the electrolyte can flow in the sealed cavity. The electrolyte is not limited in this embodiment. The shell 10 includes a body 11 and at least one heat sink 12, at least one heat sink 12 is arranged in the sealed cavity, at least one heat sink 12 and the body 11 are fixedly connected, or at least one heat sink 12 and the body 11 are an integral part, and this embodiment does not make any restrictions. Specifically, when the number of heat sinks 12 is two or more, two or more heat sinks 12 are arranged in sequence in the sealed cavity to separate the sealed cavity into a plurality of accommodation spaces arranged in sequence along the first direction X, and the accommodation space is provided to provide a placement space for the battery cell 30, and the accommodation space and the battery cell 30 are arranged one by one. Furthermore, the multiple accommodation spaces are interconnected, and when the battery cell 30 is a non-solid battery cell 30, the electrolyte can flow in the multiple accommodation spaces, thereby enabling the electrolyte of the multiple battery cells 30 to be shared. In the embodiment of the present application, since the housing 10 itself has a heat sink 12, it is not necessary to provide another heat sink 12 in the housing 10 to achieve heat dissipation, thereby increasing the space in the sealed cavity, and the increased space can be converted into a space for the battery cell 30, which has the beneficial effect of improving the battery energy density and space utilization.

[0034] Furthermore, a plurality of battery cells 30 may be provided in the battery, and the plurality of battery cells 30 share the housing 10 and the electrolyte. Compared with the design mode in which one battery cell 30 is one battery, the capacity of the battery cell 30 in the present application may be multiplied as required.

[0035] Furthermore, since the batteries share electrolyte, compared to the design mode in which one battery cell 30 is one battery, the number of battery fillings in the present application can be reduced from the common multiple fillings to two fillings, and the filling efficiency and subsequent detection efficiency can also be greatly increased.

[0036] Furthermore, since large-surface heat dissipation channels 121 are provided between the multiple battery cells 30, compared with the side heat dissipation of the traditional battery pack, the heat dissipation efficiency of the large-surface battery cells 30 is higher, the internal temperature of the battery cells 30 is more balanced, and the battery life can be improved simultaneously.

[0037] It should be noted that the material of the housing 10 can be aluminum or steel, and the wall thickness of the housing 10 can be between 0.1 mm and 0.6 mm.

[0038] Optionally, in an embodiment of the present application, the heat sink 12 is provided with a heat dissipation channel 121, which extends along the second direction Y. The body 11 includes a first surface 112 and a second surface 113 arranged opposite to each other along the second direction Y. The first surface 112 and the second surface 113 are both provided with through holes 111. The through holes 111 on the first surface 112 and the through holes 111 on the second surface 113 are arranged correspondingly and oppositely; one end of the heat dissipation channel 121 is connected to the through hole 111 on the first surface 112, and the other end of the heat dissipation channel 121 is connected to the through hole 111 on the second surface 113, so that the heat dissipation channel 121 is connected to the outside world.

[0039] In the embodiment of the present application, the heat sink 12 is provided with a heat dissipation channel 121, and the body 11 is provided with a through hole 111. Specifically, the first surface 112 and the second surface 113 are two surfaces of the body 11 that are arranged opposite to each other along the second direction Y, and the through hole 111 is provided on the second surface 113 and the second surface 113, and the through hole 111 on the first surface 112 and the through hole 111 on the second surface 113 are arranged opposite to each other. Further, one end of the heat dissipation channel 121 is connected to the through hole 111 on the first surface 112, and the other end of the heat dissipation channel 121 is connected to the through hole 111 on the second surface 113. It can be understood that the heat dissipation channel 121 is respectively connected to the through holes 111 arranged opposite to each other, so as to realize the medium exchange and flow between the outside and the heat dissipation channel 121, and then realize the cooling of the heat of the battery cell 30 through the heat dissipation channel 121. In the embodiment of the present application, since the shell 10 itself has the heat dissipation channel 121, there is no need to set the heat dissipation channel 121 in the shell 10 to achieve heat dissipation, thereby increasing the space in the sealed cavity, and the increased space can be converted into space for the battery cell 30, which has the beneficial effect of improving the battery energy density and space utilization.

[0040] Optionally, in an embodiment of the present application, the top cover 20 is connected to one end of the shell 10 along the third direction Z, the heat sink 12 has a first preset interval with the top cover 20 along the third direction Z, and the heat sink 12 has a second preset interval with the shell 10 along the third direction Z.

[0041] In the embodiment of the present application, the top cover 20 is provided to be connected to the shell 10 from the open end of the shell 10 to realize the packaging of the battery. The first preset interval is provided to provide an installation distance for the assembly between the top cover 20 and the shell 10. The second preset interval is provided to realize the circulation of electrolyte between multiple accommodating spaces. The heat sink 12 has a second preset interval along the third direction Z, that is, the heat sink 12 is not connected to the shell 10 along the third direction Z, therefore, each accommodating space is an open space, thereby providing a basic condition for realizing the sharing of electrolyte of multiple battery cells 30.

[0042] Furthermore, the first preset interval is greater than or equal to 5 mm, and the second preset interval is greater than or equal to 5 mm.

[0043] Optionally, in the embodiment of the present application, the width of the heat dissipation channel 121 along the first direction X is H, wherein 1 mm≤H≤2 mm.

[0044] In the embodiment of the present application, the heat dissipation channel 121 is provided to realize the flow of the medium, thereby realizing the cooling of the large surface of the battery cell 30. The medium can be gas or liquid, and this embodiment does not impose any limitation on this. Setting the width of the heat dissipation channel 121 to be greater than or equal to 1 mm and less than or equal to 2 mm can realize good flow of the medium in the heat dissipation channel 121.

[0045] It should be noted that at least one heat sink 12 divides the sealed cavity into at least two accommodating spaces. It can be understood that one heat sink 12 can divide the sealed cavity into two accommodating spaces. In order to improve the battery energy density and space utilization, an even number of battery cells 30 are usually arranged in the sealed cavity to utilize every surface of the heat dissipation channel 121.

[0046] Optionally, in the embodiment of the present application, the battery cell 30 includes a positive electrode tab 31 and a negative electrode tab 32 , and the orthographic projection of at least one of the positive electrode tab 31 and the negative electrode tab 32 along the second direction Y on the body 11 is S-shaped.

[0047] In the embodiment of the present application, the pole ear whose orthographic projection on the main body 11 along the second direction Y is S-shaped has the effect of improving the bearing capacity of the pole ear. In actual application, when the battery is subjected to external force, the pole ear is easily deformed and causes the battery cell 30 to fail, while the S-shaped pole ear has a higher bearing capacity, thereby having the beneficial effect of preventing deformation due to force.

[0048] Further, in the embodiment of the present application, the orthographic projections of the positive electrode tab 31 and the negative electrode tab 32 on the body 11 along the second direction Y may both be S-shaped. Alternatively, the orthographic projection of the positive electrode tab 31 on the body 11 may be S-shaped, and the orthographic projection of the negative electrode tab 32 on the body 11 along the second direction Y may be C-shaped. Alternatively, the orthographic projection of the positive electrode tab 31 on the body 11 may be C-shaped, and the orthographic projection of the negative electrode tab 32 on the body 11 along the second direction Y may be S-shaped. This embodiment does not impose any limitation on the specific situation.

[0049] Optionally, in the embodiment of the present application, the battery cell 30 also includes a positive electrode lead-out piece 33 and a negative electrode lead-out piece 34; the positive electrode lead-out piece 33 includes a first planar portion 331 and a first protruding portion 332, the first planar portion 331 is connected to the positive electrode tab 31, the first protruding portion 332 is arranged on a side of the first planar portion 331 away from the positive electrode tab 31, and the first protruding portion 332 protrudes from the first planar portion 331 along a third direction Z; the negative electrode lead-out piece 34 includes a second planar portion 341 and a second protruding portion 342, the second planar portion 341 is connected to the negative electrode tab 32, the second protruding portion 342 is arranged on a side of the second planar portion 341 away from the negative electrode tab 32, and the second protruding portion 342 protrudes from the second planar portion 341 along the third direction Z.

[0050] In the embodiment of the present application, the first planar portion 331 is provided for being connected to the positive electrode tab 31 by welding, the first protrusion 332 protrudes from the first planar portion 331 and extends in a direction away from the first planar portion 331, and is finally connected to the top cover 20. The first planar portion 331 is connected to the positive electrode tab 31 to increase the contact surface with the first tab, thereby improving the connection stability. The second planar portion 341 is provided for being connected to the negative electrode tab 32 by welding, the second protrusion 342 protrudes from the second planar portion 341 and extends in a direction away from the second planar portion 341, and is finally connected to the top cover 20. The second planar portion 341 is connected to the negative electrode tab 32 to increase the contact surface with the second tab, thereby improving the connection stability.

[0051] Optionally, in an embodiment of the present application, the top cover 20 includes a cover plate 21 and an insulating member 22, the insulating member 22 is arranged on a side of the cover plate 21 close to the battery cell 30; the top cover 20 is provided with a plurality of first connection holes 211 and a plurality of second connection holes 212, the insulating member 22 is provided with a plurality of third connection holes 221 and a plurality of fourth connection holes 222, the first connection holes 211 and the third connection holes 221 are arranged in a one-to-one correspondence, and the second connection holes 212 and the fourth connection holes 222 are arranged in a one-to-one correspondence; the first protrusion 332 passes through the third connection hole 221 and the first connection hole 211 in sequence, and the second protrusion 342 passes through the fourth connection hole 222 and the second connection hole 212 in sequence; wherein the number of the first connection holes 211, the number of the second connection holes 212, the number of the third connection holes 221, and the number of the fourth connection holes 222 are all the same as the number of the battery cells 30.

[0052] In the embodiment of the present application, the insulating member 22 is provided to achieve insulation between the cover plate 21 and the battery cell 30. The first connection hole 211 and the third connection hole 221 are provided to provide a position for the installation of the first protrusion 332, and the second connection hole 212 and the fourth connection hole 222 are provided to provide a position for the installation of the second protrusion 342. Specifically, in the actual installation process, the first protrusion 332 sequentially passes through the third connection hole 221 and the first connection hole 211 to achieve connection, and the second protrusion 342 sequentially passes through the fourth connection hole 222 and the second connection hole 212 to achieve connection. It can be understood that the first connection hole 211, the second connection hole 212, the third connection hole 221, and the fourth connection hole 222 are all provided corresponding to the battery cell 30, so the number of the first connection hole 211, the number of the second connection hole 212, the number of the third connection hole 221, and the number of the fourth connection hole 222 are the same as the number of the battery cell 30.

[0053] It should be noted that the cover plate 21 and the housing 10 may be made of the same material, such as aluminum or steel.

[0054] Optionally, in an embodiment of the present application, the battery cell 30 further includes a positive external pole 35 and a negative external pole 36, and the positive external pole 35 and the negative external pole 36 are both arranged on a side of the cover plate 21 away from the insulating member 22; wherein the positive external pole 35 is sleeved on the first protrusion 332, and the negative external pole 36 is sleeved on the second protrusion 342.

[0055] In the embodiment of the present application, the positive outer pole 35 is configured to be connected to the first protrusion 332, and the negative outer pole 36 is configured to be connected to the second protrusion 342. In actual application, after the first protrusion 332 passes through the third connection hole 221 and the first connection hole 211 in sequence, the first protrusion 332 is installed in the positive outer pole 35 and the outer pole welding is completed. After the second protrusion 342 passes through the fourth connection hole 222 and the second connection hole 212 in sequence, the second protrusion 342 is installed in the negative outer pole 36 to complete the outer pole welding.

[0056] Optionally, in an embodiment of the present application, the battery also includes a first fixing member 40 and a second fixing member 50, and a first groove 213 and a second groove 214 are provided on a side of the cover plate 21 facing away from the insulating member 22, the first fixing member 40 is clamped in the first groove 213, and the second fixing member 50 is clamped in the second groove 214; the first fixing member 40 is provided with a first limiting groove 41, and the second fixing member 50 is provided with a second limiting groove 51, the positive outer pole 35 is clamped in the first limiting groove 41, and the negative outer pole 36 is clamped in the second limiting groove 51.

[0057] In the embodiment of the present application, the first fixing member 40 is configured to limit the positive outer pole 35, and the second fixing member 50 is configured to limit the negative outer pole 36. The first groove 213 is configured to limit the first fixing member 40, and the second groove 214 is configured to limit the second fixing member 50. The first fixing member 40, the second fixing member 50, the first groove 213 and the second groove 214 are all limiting members, and the limiting members are configured to prevent the various components of the battery from being separated from each other when subjected to external force. Further, the positive outer pole 35 is clamped in the first limiting groove 41 to limit the positive outer pole 35, and the negative outer pole 36 is clamped in the second limiting groove 51 to limit the negative outer pole 36.

[0058] It should be noted that both the first fixing member 40 and the second fixing member 50 are made of insulating materials.

[0059] Furthermore, the battery in the present application may have the following assembly process: the positive electrode sheet is produced by rolling, slitting, die-cutting and other technologies. The negative electrode sheet is produced by rolling, slitting, die-cutting and other technologies. The positive electrode sheet, negative electrode sheet, diaphragm, etc. are stacked into a battery cell 30 according to specific rules through lamination technology. The pre-welding treatment of the positive electrode tab 31 and the negative electrode tab 32 is completed by an ultrasonic welding machine; the welding of the positive electrode tab 31, the negative electrode tab 32, the positive electrode column lead-out piece 33 and the negative electrode column lead-out piece 34 of each battery cell 30 is completed by a laser welding machine. The battery cells 30 are combined in a specific manner and assembled and sunk into the shell 10. The insulating part 22 is installed and a specific tab shape is folded using the tab folding technology. The insulating member 22 and the cover plate 21 are sequentially installed and the welding between the top cover 20 and the shell 10 is completed; the positive outer pole column 35 spacer, the negative outer pole column 36 spacer, the positive outer pole column 35 and the negative outer pole column 36 are installed and the welding is completed.

[0060] Optionally, in an embodiment of the present application, a battery pack is also provided, comprising the battery as described above.

[0061] In the embodiment of the present application, the battery pack having the battery as described above, because the battery shell itself has the heat sink 12, there is no need to set another heat sink 12 in the shell 10 to achieve heat dissipation, thereby increasing the space in the sealed cavity, and the increased space can be converted into space for preventing the battery cell 30, which has the beneficial effect of improving the battery energy density and space utilization.

[0062] Optionally, in an embodiment of the present application, an electrical device is also provided, comprising the battery pack as described above.

[0063] In the embodiment of the present application, the electrical equipment includes the battery pack as described above, and has all the beneficial effects of the battery pack as described above, which will not be repeated here.

[0064] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0065] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery, characterized in that: The battery has a first direction, a second direction and a third direction, the first direction and the second direction intersect, and the third direction is perpendicular to the plane where the first direction and the second direction are located; The battery comprises a shell, a top cover and a plurality of battery cells, wherein the shell and the top cover enclose a sealed cavity, and the plurality of battery cells are arranged in the sealed cavity; The shell includes a main body and at least one heat sink, so as to separate the sealed cavity into at least two accommodating spaces arranged in sequence along the first direction, at least two of the accommodating spaces are interconnected, and the accommodating spaces and the battery cells are arranged in one-to-one correspondence.

2. The battery according to claim 1, characterized in that The heat sink is provided with a heat dissipation channel, the heat dissipation channel extends along the second direction, the body comprises a first surface and a second surface arranged opposite to each other along the second direction, the first surface and the second surface are both provided with through holes, the through holes on the first surface and the through holes on the second surface are arranged opposite to each other; One end of the heat dissipation channel is connected to the through hole on the first surface, and the other end of the heat dissipation channel is connected to the through hole on the second surface, so that the heat dissipation channel is connected to the outside.

3. The battery according to claim 1, characterized in that The top cover is connected to one end of the shell along the third direction, the heat sink has a first preset interval with the top cover along the third direction, and the heat sink has a second preset interval with the shell along the third direction.

4. The battery according to claim 2, characterized in that The width of the heat dissipation channel along the first direction is H, wherein 1 mm≤H≤2 mm.

5. The battery according to claim 1, characterized in that The battery cell comprises a positive electrode tab and a negative electrode tab, and an orthographic projection of at least one of the positive electrode tab and the negative electrode tab on the body along the second direction is S-shaped.

6. The battery according to any one of claims 1 to 5, characterized in that: The battery cell also includes a positive electrode lead-out piece and a negative electrode lead-out piece; The positive electrode lead-out piece includes a first plane portion and a first protrusion portion, the first plane portion is connected to the positive electrode tab of the battery cell, the first protrusion portion is arranged on a side of the first plane portion away from the positive electrode tab, and the first protrusion portion protrudes from the first plane portion along the third direction; The negative electrode lead-out piece includes a second planar portion and a second protruding portion, the second planar portion is connected to the negative electrode tab of the battery cell, the second protruding portion is arranged on a side of the second planar portion away from the negative electrode tab, and the second protruding portion protrudes from the second planar portion along the third direction.

7. The battery according to claim 6, characterized in that The top cover includes a cover plate and an insulating member, and the insulating member is arranged on a side of the cover plate close to the battery cell; The top cover is provided with a plurality of first connection holes and a plurality of second connection holes, the insulating member is provided with a plurality of third connection holes and a plurality of fourth connection holes, the first connection holes and the third connection holes are arranged in a one-to-one correspondence, and the second connection holes and the fourth connection holes are arranged in a one-to-one correspondence; The first protrusion passes through the third connection hole and the second connection hole in sequence, and the second protrusion passes through the fourth connection hole and the third connection hole in sequence; The number of the first connection holes, the number of the second connection holes, the number of the third connection holes, and the number of the fourth connection holes are all the same as the number of the battery cells.

8. The battery according to claim 7, characterized in that The battery cell further comprises a positive external pole and a negative external pole, wherein the positive external pole and the negative external pole are both arranged on a side of the cover plate away from the insulating member; Wherein, the positive outer pole is sleeved on the first protrusion, and the negative outer pole is sleeved on the second protrusion.

9. The battery according to claim 8, characterized in that The battery further comprises a first fixing member and a second fixing member, a first groove and a second groove are formed on a side of the cover plate away from the insulating member, the first fixing member is clamped in the first groove, and the second fixing member is clamped in the second groove; The first fixing member is provided with a first limiting groove, the second fixing member is provided with a second limiting groove, the positive outer pole is clamped in the first limiting groove, and the negative outer pole is clamped in the second limiting groove.

10. A battery pack, characterized in that: Comprising the battery according to any one of claims 1 to 9.

11. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 10.

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