Battery structure and battery

Abstract

In order to solve the problems that an existing fireproof battery is complex in structure, large in number of parts and large in size and influences the energy density of the battery, the utility model provides a battery structure which comprises a fixing support and a plurality of battery cells, the fixing support is a phase-change material support, a plurality of limiting holes are formed in the fixing support, and the battery cells are embedded into the limiting holes; the battery cell is directly arranged in the fixing support made of the phase change material, the fixing support made of the phase change material has elasticity, the battery cell and the fixing support can be assembled in a zero-clearance mode, other heat insulation or insulation materials do not need to be arranged between the battery cell and the fixing support, use of parts is reduced, the structure is simple, the number of parts is small, and cost is low. The battery is small in size, so that the energy density of the battery is improved; the phase-change material has the effects of heat absorption and heat dissipation, and the phase-change material absorbs heat generated by the battery cell to cool the battery cell, so that out-of-control ignition caused by over-high temperature rise of the battery during charging of the battery can be controlled.

Description

Technical Field

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

[0002] With the increasing number of wireless electronic products, the use of batteries is also increasing. Consumers are paying more and more attention to battery safety issues. We often see news reports that batteries catch fire during charging, and the entire battery quickly burns, and even causes the entire product to burn. In addition, as fast charging becomes faster and faster, the battery temperature rises faster during charging, which also leads to a higher risk of thermal runaway and fire.

[0003] Existing battery structures for preventing battery fires all have the problems of complex structures and many components, which lead to large battery volume and affect the battery energy density; therefore, how to overcome the above-mentioned technical problems and defects has become a key issue that needs to be solved. Utility Model Content

[0004] Aiming at the problem that existing fireproof batteries have complex structures, many components, large battery volumes and affect battery energy density, the utility model provides a battery structure and a battery.

[0005] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0006] On one hand, the utility model provides a battery structure, including a fixing bracket and a plurality of battery cells, wherein the fixing bracket is a phase change material bracket, and a plurality of limiting holes are provided on the fixing bracket, and the battery cells are embedded in the limiting holes.

[0007] Optionally, the distance between two adjacent limiting holes is 2-5 mm.

[0008] Optionally, the fixed bracket includes a first bracket and a second bracket, one end of the first bracket is provided with multiple first limiting holes, and one end of the second bracket is provided with a second limiting hole at a position corresponding to the first limiting hole, and the limiting hole is composed of the first limiting hole and the second limiting hole, and the two ends of the battery cell are respectively located in the first limiting hole and the second limiting hole.

[0009] Optionally, a first limiting plate is provided at one end of the first bracket facing away from the second bracket, and the first limiting plate is arranged along an axial direction perpendicular to the first limiting hole. A first through hole is provided on the first limiting plate at a position corresponding to the first limiting hole, and the first through hole is coaxially arranged with the first limiting hole, and the diameter of the first through hole is smaller than the diameter of the first limiting hole, and the end of the battery cell abuts against the inner surface of the first limiting plate.

[0010] Optionally, a second limiting plate is provided at the end of the second bracket facing away from the first bracket, and the second limiting plate is arranged along the axial direction perpendicular to the second limiting hole. A second through hole is provided on the second limiting plate at a position corresponding to the second limiting hole, and the second through hole is coaxially arranged with the second limiting hole, and the diameter of the second through hole is smaller than the diameter of the second limiting hole, and the end of the battery cell abuts against the inner surface of the second limiting plate.

[0011] Optionally, multiple adjacent first through holes on the first limiting plate are connected to form a first groove portion, and multiple first groove portions are formed on the first limiting plate, and a first nickel sheet is arranged in each first groove portion, and the first nickel sheet includes multiple first welding sheets, multiple first connecting sheets and second welding sheets, and two adjacent first welding sheets are respectively connected to the two ends of the first connecting sheet, and the second welding sheet is connected to the side of the first connecting sheet and extends in a direction perpendicular to the plane where the first connecting sheet is located; the side of the first welding sheet close to the battery cell is used for welding to the pole of the battery cell, and the side of the first nickel sheet away from the battery cell is connected to a PCM board, and a slot is provided on the PCM board, and the second welding sheet passes through the slot and is welded to the PCM board, and a first insulating sheet is provided on the side of the PCM board away from the first limiting plate.

[0012] Optionally, a cable is further included, and a first slot is provided on the first insulating sheet at a position corresponding to the output end of the PCM board. One end of the cable is embedded in the first slot and connected to the output end of the PCM board.

[0013] Optionally, multiple second through holes on the second limiting plate are connected to form a second groove portion, and a second nickel sheet is arranged in the second groove portion. The second nickel sheet includes multiple third welding sheets, multiple second connecting sheets and fourth welding sheets. The multiple third welding sheets are connected by multiple second connecting sheets. The fourth welding sheet is connected to the outer edge of one of the second connecting sheets and extends in a direction perpendicular to the plane where the second connecting sheet is located; the third welding sheet is welded to the pole of the battery cell on the side close to the battery cell, and a second insulating sheet is provided on the side of the second nickel sheet away from the battery cell.

[0014] Optionally, a wire is further included, and a second slot is provided on the side of the fixing bracket. The wire is embedded in the second slot and connected to the fourth welding piece of the second nickel sheet.

[0015] Another aspect of the present invention provides a battery, and the battery comprises the battery structure as described above.

[0016] According to the battery structure provided by the present invention, the present application directly sets the battery cell in a fixed bracket made of phase change material. The fixed bracket made of phase change material is elastic, the battery cell can be assembled with the fixed bracket with zero gap, and no other heat insulation or insulating materials are required between the battery cell and the fixed bracket, which reduces the use of parts, has a simple structure, fewer parts, and a small battery volume, thereby improving the energy density of the battery; moreover, the two adjacent battery cells are all wrapped and separated by phase change material, which has heat absorption and heat dissipation functions, and the fixed bracket made of phase change material can be adjusted and the temperature limit can be set before molding. For example, during the charging process of the battery, the battery cell temperature cannot exceed 65°C. The phase change material can be customized. When the battery cell temperature exceeds 65°C-85°C, the phase change material absorbs the heat of the battery cell to cool the battery cell, and the absorbed heat can be released to the air or other heat-conducting facilities; in this way, it can be ensured that the battery temperature rise is controlled to be too high during charging to prevent uncontrolled fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic structural diagram of a battery structure provided by an embodiment of the present utility model;

[0019] Figure 2 This is an exploded schematic diagram of a battery structure provided by an embodiment of the present utility model;

[0020] Figure 3 This is a schematic structural diagram of the first nickel sheet in the battery structure provided by one embodiment of the present utility model;

[0021] Figure 4 This is a schematic structural diagram of the second nickel sheet in the battery structure provided by one embodiment of the present utility model;

[0022] Figure 5 This is a schematic top view of the first bracket in the battery structure provided by one embodiment of the present utility model;

[0023] Figure 6 This is a bottom view of the first bracket in the battery structure provided by one embodiment of the present utility model;

[0024] Figure 7 This is a bottom view of the second bracket in the battery structure provided by one embodiment of the present utility model;

[0025] Figure 8This is a schematic top view of the second bracket in the battery structure provided by one embodiment of the present utility model;

[0026] The reference numerals in the drawings of the specification are as follows:

[0027] 100-fixed bracket; 110-limiting hole; 120-second card slot; 11-first bracket; 111-first limiting hole; 112-first limiting plate; 113-first through hole; 114-first groove; 12-second bracket; 121-second limiting hole; 122-second limiting plate; 123-second through hole; 124-second groove; 2-first nickel sheet; 21-first welding sheet; 22-first connecting sheet; 23-second welding sheet; 3-second nickel sheet; 31-third welding sheet; 32-second connecting sheet; 33-fourth welding sheet; 4-battery cell; 5-PCM board; 51-slot; 61-first insulating sheet; 611-first card slot; 62-second insulating sheet; 7-cable; 8-wire. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1-2As shown, in one embodiment, the utility model provides a battery structure, including a fixing bracket 100 and a plurality of battery cells 4, wherein the fixing bracket 100 is a phase change material bracket, and a plurality of limiting holes 110 are provided on the fixing bracket 100, and the battery cells 4 are embedded in the limiting holes 110.

[0032] Specifically, the number of the battery cells 4 is at least 2. In a preferred embodiment, the number of the battery cells 4 is 4.

[0033] In the present application, the battery cell 4 is directly arranged in a fixed bracket 100 made of phase change material. The fixed bracket 100 made of phase change material is elastic, and the battery cell 4 can be assembled with the fixed bracket 100 with zero gap, and no other heat insulation or insulating materials are required between the battery cell 4 and the fixed bracket 100, which reduces the use of parts, has a simple structure, fewer parts, and a small battery volume, thereby improving the energy density of the battery; moreover, the two adjacent battery cells 4 are all wrapped and separated by phase change material, which has heat absorption and heat dissipation functions. The fixed bracket 100 made of phase change material can be adjusted and set with a temperature limit before molding. For example, during the charging process of the battery, the temperature of the battery cell 4 cannot exceed 65°C. The phase change material can be customized. When the temperature of the battery cell 4 exceeds 65°C-85°C, the phase change material absorbs the heat of the battery cell 4 to cool the battery cell 4, and the absorbed heat can be released to the air or other heat-conducting facilities; in this way, it can be ensured that the battery temperature rise is controlled to prevent uncontrolled fire during charging.

[0034] like Figure 2 As shown, in one embodiment, the distance between two adjacent limiting holes 110 is 2-5 mm.

[0035] In a preferred embodiment, the distance between two adjacent limiting holes 110 is 3 mm. Specifically, the distance between two adjacent limiting holes 110 is any value among 2 mm, 3 mm, 4 mm or 5 mm, or a range value consisting of any two values.

[0036] When the distance between two adjacent limiting holes 110 is 2-5 mm, the heat conduction and thermal conductivity of the air are very small, so the heat transfer effect between two adjacent battery cells 4 is very small, and it is difficult to cause thermal runaway and fire of adjacent battery cells 4; moreover, the fixing bracket 100 made of phase change material has burn-resistant and heat-insulating effects. When one of the battery cells 4 has thermal runaway and fire, it will be blocked by the fixing bracket 100 made of phase change material, thereby not affecting the thermal runaway and fire of other battery cells 4.

[0037] like Figure 2As shown, in one embodiment, the fixing bracket 100 includes a first bracket 11 and a second bracket 12, one end of the first bracket 11 is provided with a plurality of first limiting holes 111, and one end of the second bracket 12 is provided with a second limiting hole 121 at a position corresponding to the first limiting hole 111, and the limiting hole 110 is composed of the first limiting hole 111 and the second limiting hole 121, and the two ends of the battery cell 4 are respectively located in the first limiting hole 111 and the second limiting hole 121.

[0038] Specifically, the first bracket 11 and the second bracket 12 are both made of insulating material; the number of the first limiting holes 111 is at least 2, and in a preferred embodiment, the number of the first limiting holes 111 is 4.

[0039] Similarly, the number of the second limiting holes 121 is at least 2. In a preferred embodiment, the number of the second limiting holes 121 is 4. The first limiting holes 111 and the second limiting holes 121 are arranged opposite to each other.

[0040] In the present application, one end of the battery cell 4 is embedded in the first limiting hole 111, and the other end of the battery cell 4 is embedded in the second limiting hole 121. The battery cell 4 can be assembled with the first bracket 11 and the second bracket 12 with zero gap, and no other heat-insulating or insulating materials are required between the battery cell 4 and the first bracket 11, and no other heat-insulating or insulating materials are required between the battery cell 4 and the second bracket 12, thereby reducing the use of parts. Moreover, the two adjacent battery cells 4 are all separated by wrapping with phase change materials, and the fixed bracket 100 made of phase change material has burn-resistant and heat-insulating effects. When one of the battery cells 4 has a thermal runaway fire, it will be blocked by the fixed bracket 100 made of phase change material, so as not to affect the thermal runaway fire of other battery cells 4.

[0041] like Figure 5-6 As shown, in one embodiment, a first limiting plate 112 is provided at one end of the first bracket 11 facing away from the second bracket 12, and the first limiting plate 112 is arranged along the axial direction perpendicular to the first limiting hole 111. A first through hole 113 is provided on the first limiting plate 112 at a position corresponding to the first limiting hole 111, and the first through hole 113 is coaxially arranged with the first limiting hole 111, and the diameter of the first through hole 113 is smaller than the diameter of the first limiting hole 111, and the end of the battery cell 4 abuts against the inner surface of the first limiting plate 112.

[0042] Specifically, the first through hole 113 is coaxially arranged with the first limiting hole 111, and the diameter of the first through hole 113 is smaller than the diameter of the first limiting hole 111. The diameter of the first limiting hole 111 is the same as the diameter of the battery cell 4, so that the diameter of the first through hole 113 is smaller than the diameter of the battery cell 4. When one end of the battery cell 4 is embedded in the first limiting hole 111, the first through hole 113 can limit the end of the battery cell 4; further, the diameter of the first through hole 113 is larger than the diameter of the battery cell 4 pole, so as to facilitate the subsequent welding of the battery cell 4 pole.

[0043] like Figure 7-8 As shown, in one embodiment, a second limiting plate 122 is provided at one end of the second bracket 12 facing away from the first bracket 11, and the second limiting plate 122 is arranged along the axial direction perpendicular to the second limiting hole 121. A second through hole 123 is provided on the second limiting plate 122 at a position corresponding to the second limiting hole 121. The second through hole 123 is coaxially arranged with the second limiting hole 121, and the diameter of the second through hole 123 is smaller than the diameter of the second limiting hole 121, and the end of the battery cell 4 abuts against the inner surface of the second limiting plate 122.

[0044] Specifically, the second through hole 123 is coaxially arranged with the second limiting hole 121, and the diameter of the second through hole 123 is smaller than the diameter of the second limiting hole 121. The diameter of the second limiting hole 121 is the same as the diameter of the battery cell 4, so that the diameter of the second through hole 123 is smaller than the diameter of the battery cell 4. When one end of the battery cell 4 is embedded in the second limiting hole 121, the second through hole 123 can limit the end of the battery cell 4; further, the diameter of the second through hole 123 is larger than the diameter of the battery cell 4 pole, so as to facilitate the subsequent welding of the battery cell 4 pole.

[0045] like Figure 3 and Figure 5-6As shown, in one embodiment, multiple adjacent first through holes 113 on the first limiting plate 112 are connected to form a first groove portion 114, and multiple first groove portions 114 are formed on the first limiting plate 112, and a first nickel sheet 2 is provided in each first groove portion 114, and the first nickel sheet 2 includes multiple first welding sheets 21, multiple first connecting sheets 22 and second welding sheets 23, and two adjacent first welding sheets 21 are respectively connected to the two ends of the first connecting sheet 22, and the second welding sheet 23 is connected to the side of the first connecting sheet 22 and extends in a direction perpendicular to the plane where the first connecting sheet 22 is located; the side of the first welding sheet 21 close to the battery cell 4 is used for welding to the pole of the battery cell 4, and the side of the first nickel sheet 2 away from the battery cell 4 is connected to the PCM board 5, and a slot 51 is provided on the PCM board 5, and the second welding sheet 23 passes through the slot 51 and is welded to the PCM board 5, and the side of the PCM board 5 away from the first limiting plate 112 is provided with a first insulating sheet 61.

[0046] Specifically, the first welding piece 21 is circular, and the diameter of the first welding piece 21 is smaller than the diameter of the first through hole 113 , so that the first welding piece 21 can be easily embedded in the first through hole 113 .

[0047] In a preferred embodiment, four first limiting holes 111 are provided on the first bracket 11, and the first limiting holes 111 are arranged in a 2*2 array; two adjacent first through holes 113 are connected to form a first groove portion 114, and a total of two first groove portions 114 are formed; a first nickel sheet 2 is provided in each of the first groove portions 114, and the first nickel sheet 2 includes two first welding sheets 21, one first connecting sheet 22 and one second welding sheet 23; the two first welding sheets 21 are respectively connected to the two ends of the first connecting sheet 22; the two first welding sheets 21 are respectively welded to the poles of the opposite battery cells 4.

[0048] In a preferred embodiment, six first limiting holes 111 are provided on the first bracket 11, and the first limiting holes 111 are arranged in a 2*3 array; two adjacent first through holes 113 are connected to form a first groove portion 114, forming a total of three first groove portions 114; a first nickel sheet 2 is provided in each of the first groove portions 114, and the first nickel sheet 2 includes two first welding sheets 21, one first connecting sheet 22, and one second welding sheet 23; the two first welding sheets 21 are respectively connected to the two ends of the first connecting sheet 22; and the two first welding sheets 21 are respectively welded to the poles of the opposite battery cells 4;

[0049] Or three adjacent first through holes 113 are connected to form a first groove portion 114, forming two first groove portions 114 in total; a first nickel sheet 2 is disposed in each of the first groove portions 114, and the first nickel sheet 2 includes three first welding sheets 21, two first connecting sheets 22, and one second welding sheet 23; a first connecting sheet 22 is connected between adjacent first welding sheets 21; the three first welding sheets 21 are respectively welded to the poles of the opposite battery cells 4;

[0050] Similarly, a plurality of first limiting holes 111 are provided on the first bracket 11, and the plurality of first limiting holes 111 form a plurality of first groove portions 114 according to a certain rule, and a first nickel sheet 2 is provided in each of the first groove portions 114; a plurality of first welding sheets 21 are provided on the first nickel sheet 2 for welding with the poles of the relative battery cells 4.

[0051] The first insulating sheet 61 is used to seal one end of the first bracket 11 , thereby protecting the first nickel sheet 2 and the PCM board 5 .

[0052] like Figure 1-2 As shown, in one embodiment, a flat cable 7 is further included. A first slot 611 is provided on the first insulating sheet 61 at a position corresponding to the output end of the PCM board 5. One end of the flat cable 7 is embedded in the first slot 611 and connected to the output end of the PCM board 5. The other end of the flat cable 7 is connected to an electrical device to provide power to the electrical device.

[0053] like Figure 4 and Figure 7-8 As shown, in one embodiment, multiple second through holes 123 on the second limiting plate 122 are connected to form a second groove portion 124, and a second nickel sheet 3 is arranged in the second groove portion 124, and the second nickel sheet 3 includes multiple third welding sheets 31, multiple second connecting sheets 32 and fourth welding sheets 33. The multiple third welding sheets 31 are connected by multiple second connecting sheets 32, and the fourth welding sheet 33 is connected to the outer edge of one of the second connecting sheets 32 and extends in a direction perpendicular to the plane where the second connecting sheet 32 is located; the third welding sheet 31 is welded to the pole of the battery cell 4 on the side close to the battery cell 4, and a second insulating sheet 62 is provided on the side of the second nickel sheet 3 away from the battery cell 4.

[0054] Specifically, the third welding piece 31 is circular, and the diameter of the third welding piece 31 is smaller than the diameter of the second through hole 123 , so that the third welding piece 31 can be easily embedded in the second through hole 123 .

[0055] In a preferred embodiment, four first limiting holes 111 are provided on the first bracket 11, and the first limiting holes 111 are arranged in a 2*2 array; the four second through holes 123 are connected to form a second groove portion 124, and a second nickel sheet 3 is provided in the second groove portion 124. The second nickel sheet 3 includes four first welding sheets 21, 3-4 second connecting sheets 32 and one second welding sheet 23; the four first welding sheets 21 are connected by the second connecting sheet 32 to form the second nickel sheet 3, and the second nickel sheet 3 is in the shape of a "mouth", an "I" or a "cross", and the four third welding sheets 31 are respectively welded to the poles of the opposite battery cell 4;

[0056] Similarly, a plurality of first limiting holes 111 are provided on the first bracket 11, and the plurality of first limiting holes 111 are connected to form a second groove portion 124, in which a second nickel sheet 3 is provided; a plurality of first welding sheets 21 are provided on the second nickel sheet 3 for welding with the poles of the relative battery cells 4.

[0057] The second insulating sheet 62 is used to seal the end of the second bracket 12 , thereby protecting the second nickel sheet 3 .

[0058] like Figure 1-2 As shown, in one embodiment, a wire 8 is further included. A second slot 120 is opened on the side of the fixing bracket 100. The wire 8 is embedded in the second slot 120 and connected to the fourth welding piece 33 of the second nickel sheet 3.

[0059] The wire 8 is disposed in the second slot 120 and connected to the fourth welding piece 33 of the second nickel sheet 3 ; the other end of the wire 8 is connected to an electrical device to provide power to the electrical device.

[0060] The shape of the second card slot 120 is close to that of a triangular prism. The width of the second card slot 120 gradually decreases from the edge to the center of the fixing bracket 100. The setting of the second card slot 120 is convenient for fixing the wire 8 and does not occupy the volume of the battery. The shape of the second card slot 120 is close to that of a triangular prism. The width of the second card slot 120 gradually decreases in the area close to the limiting hole 110, thereby not affecting the distance between the adjacent limiting holes 110 and not increasing the heat transfer between the two adjacent battery cells 4. It can ensure that the battery temperature rise is controlled to be too high during charging to prevent uncontrolled fire.

[0061] Another aspect of the present invention provides a battery, and the battery comprises the battery structure as described above.

[0062] The shape of the battery can be any one of a cylindrical shape, a triangular prism shape, and a rectangular shape. The shape of the first nickel sheet 2 and / or the second nickel sheet 3 is the same as that of the battery.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery structure, characterized in that: It includes a fixing bracket and multiple battery cells. The fixing bracket is a phase change material bracket. The fixing bracket is provided with multiple limiting holes, and the battery cells are embedded in the limiting holes.

2. The battery structure according to claim 1, wherein: The distance between two adjacent limiting holes is 2-5 mm.

3. The battery structure according to claim 1, wherein: The fixed bracket includes a first bracket and a second bracket, one end of the first bracket is provided with multiple first limiting holes, and one end of the second bracket is provided with a second limiting hole at a position corresponding to the first limiting hole. The limiting hole is composed of the first limiting hole and the second limiting hole, and the two ends of the battery cell are respectively located in the first limiting hole and the second limiting hole.

4. The battery structure according to claim 3, characterized in that: A first limiting plate is provided at one end of the first bracket facing away from the second bracket, and the first limiting plate is arranged along an axial direction perpendicular to the first limiting hole. A first through hole is provided on the first limiting plate at a position corresponding to the first limiting hole, and the first through hole is coaxially arranged with the first limiting hole, and the diameter of the first through hole is smaller than the diameter of the first limiting hole, and the end of the battery cell abuts against the inner surface of the first limiting plate.

5. The battery structure according to claim 3, characterized in that: A second limiting plate is provided at one end of the second bracket facing away from the first bracket, and the second limiting plate is arranged along the axial direction perpendicular to the second limiting hole. A second through hole is provided on the second limiting plate at a position corresponding to the second limiting hole, and the second through hole is coaxially arranged with the second limiting hole, and the diameter of the second through hole is smaller than the diameter of the second limiting hole, and the end of the battery cell abuts against the inner surface of the second limiting plate.

6. The battery structure according to claim 4, characterized in that: Multiple adjacent first through holes on the first limiting plate are connected to form a first groove portion, and multiple first groove portions are formed on the first limiting plate. A first nickel sheet is arranged in each of the first groove portions, and the first nickel sheet includes multiple first welding sheets, multiple first connecting sheets and a second welding sheet. Two adjacent first welding sheets are respectively connected to the two ends of the first connecting sheet, and the second welding sheet is connected to the side of the first connecting sheet and extends in a direction perpendicular to the plane where the first connecting sheet is located; the side of the first welding sheet close to the battery cell is used for welding to the pole of the battery cell, and the side of the first nickel sheet away from the battery cell is connected to the PCM board, and the PCM board is provided with a slot hole. The second welding sheet passes through the slot hole and is welded to the PCM board, and the side of the PCM board away from the first limiting plate is provided with a first insulating sheet.

7. The battery structure according to claim 6, characterized in that: The cable is also included. A first slot is provided on the first insulating sheet at a position corresponding to the output end of the PCM board. One end of the cable is embedded in the first slot and connected to the output end of the PCM board.

8. The battery structure according to claim 5, characterized in that: Multiple second through holes on the second limiting plate are connected to form a second groove portion, and a second nickel sheet is arranged in the second groove portion. The second nickel sheet includes multiple third welding sheets, multiple second connecting sheets and fourth welding sheets. The multiple third welding sheets are connected by multiple second connecting sheets. The fourth welding sheet is connected to the outer edge of one of the second connecting sheets and extends in a direction perpendicular to the plane where the second connecting sheet is located; the side of the third welding sheet close to the battery cell is welded to the pole of the battery cell, and the side of the second nickel sheet away from the battery cell is provided with a second insulating sheet.

9. The battery structure according to claim 8, characterized in that: It also includes a wire. A second slot is opened on the side of the fixing bracket. The wire is embedded in the second slot and connected to the fourth welding piece of the second nickel sheet.

10. A battery, characterized in that: The battery comprises a battery structure as described in any one of claims 1-9.

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