High-voltage battery cell structure and cylindrical battery

Abstract

The utility model provides a high-voltage battery cell structure and a cylindrical battery, the high-voltage battery cell structure comprises a shell, a positive electrode cover assembly, a negative electrode cover assembly and a cell body assembly, the shell is provided with a battery cell placing cavity, and the positive electrode cover assembly and the negative electrode cover assembly which are provided with liquid guide holes are respectively arranged at two ends of the shell in a covering manner; the core body assembly comprises at least two core bodies, a separation sheet and a confluence connecting piece, the core bodies are sequentially arranged in the battery cell placing cavity, two ends of the confluence connecting piece are respectively connected to one ends of the two core bodies, the other end of one core body is connected to the positive electrode cover assembly, and the other end of the other core body is connected to the negative electrode cover assembly; the confluence connecting piece is arranged in a connecting through groove formed in the partition piece in a penetrating mode, and the two sides of the partition piece abut against the two ends of the confluence connecting piece in an interference mode. The cell bodies are connected in series and are infiltrated in the cell placing cavity, so that the output voltage is increased, and the cost is reduced; and the separation sheets abut against the confluence connecting piece in an interference manner and tightly press the cell body, so that the high-voltage cell structure is tighter.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cylindrical batteries, and in particular, to a high-voltage cell structure and a cylindrical battery. Background Art

[0002] With the rapid development of the new energy industry, large cylindrical batteries such as 46120 and 46135 have gradually become the new stars in the industry. Due to their excellent performance and easy-to-use flexible size, each manufacturer has invested in the research and development of large cylindrical batteries.

[0003] However, since cylindrical batteries are mainly used for energy storage and power, the open-circuit voltage of a single cell is generally lower than 4.4V. Among them, the single cell voltage of the lithium iron phosphate system is only 3.65V. When applied at the Pack end, it is usually necessary to provide the battery's operating voltage by connecting multiple cells in series. When connecting multiple cells in series, it is necessary to weld or use a series connection device to connect each cell. The battery with multiple cells connected in series cannot be applied to small-sized portable energy storage products.

[0004] For example, the comparative document CN202221173972.7 of the prior art discloses a cylindrical battery series connection device and a cylindrical battery. The cylindrical battery series connection device includes a first elastic bracket, the first elastic bracket forms a first groove body, and the first elastic bracket is adapted to clamp the negative electrode end of the cell inserted into the first groove body. A first conductor is provided on the inner wall of the first groove body, and the first conductor is connected to the negative electrode end of the cell; a second elastic bracket, the second elastic bracket forms a second groove body, and the second elastic bracket is adapted to clamp the cap end of the cell inserted into the second groove body. A second conductor is provided in the second groove body, and the second conductor is connected to the cap of the cell, and the first conductor and the second conductor are electrically connected. When multiple cells are connected in series in this solution, it is not necessary to fix the cells by welding, reducing the battery assembly cost. However, in this solution, when connecting multiple cylindrical batteries through a series connection device, since the series connection device needs to occupy additional space, this solution is not suitable for small-sized portable energy storage products. Summary of the Utility Model

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a high-voltage cell structure and a cylindrical battery that increase the output voltage and have a compact structure.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] A high-voltage battery cell structure includes a housing, a positive cover assembly, a negative cover assembly, and a core assembly. The housing is provided with a battery cell placement cavity. The positive cover assembly and the negative cover assembly are respectively disposed at both ends of the housing. The positive cover assembly is provided with a positive liquid guiding hole communicating with the battery cell placement cavity, and the negative cover assembly is provided with a negative liquid guiding hole communicating with the battery cell placement cavity. A second seal is installed in the negative liquid guiding hole. Its characteristics are as follows:

[0008] The core assembly includes cores, separator sheets, and current collecting connectors. The number of cores is at least two. Each core is sequentially arranged in the battery cell placement cavity. Both ends of the current collecting connector are respectively connected to one end of two different cores. One end of one core is connected to the positive cover assembly, and the other end of the other core is connected to the negative cover assembly. The separator sheet is provided with a connecting through groove, and the current collecting connector passes through the connecting through groove. Both sides of the separator sheet are in interference contact with both ends of the current collecting connector.

[0009] In one embodiment, the current collecting connector includes a first current collecting plate, a second current collecting plate, and a connector. The first current collecting plate is connected to one of the cores, the second current collecting plate is connected to the other core, and both ends of the connector are respectively connected to the first current collecting plate and the second current collecting plate. The connector passes through the connecting through groove.

[0010] In one embodiment, the connecting through groove is an inclined through groove structure. One end of the connector is disposed on one side of the core, and the other end of the connector is disposed on the other side of the core.

[0011] In one embodiment, the first current collecting plate is provided with a first liquid passing through groove, and the second current collecting plate is provided with a second liquid passing through groove.

[0012] In one embodiment, the number of the first liquid passing through grooves and the second liquid passing through grooves is multiple. The multiple first liquid passing through grooves are arranged at intervals along the circumferential direction of the first current collecting plate, and the multiple second liquid passing through grooves are arranged at intervals along the circumferential direction of the second current collecting plate.

[0013] In one embodiment, the separator sheet is provided with liquid passing holes.

[0014] In one embodiment, the number of the cores, the separator sheets, and the current collecting connectors is multiple. The multiple cores are arranged in the battery cell placement cavity. Both ends of each current collecting connector are respectively connected to two adjacent cores, and each separator sheet is respectively disposed on the corresponding current collecting connector.

[0015] In one embodiment, the positive electrode cover assembly includes a positive electrode busbar, a positive electrode post, a positive electrode end cover, a first pressure relief valve, and a first seal. The positive electrode end cover is connected to one end of the housing. The positive electrode end cover is provided with a positive electrode post hole and a first pressure relief hole that communicate with the battery cell placement cavity. The positive electrode liquid guide hole is opened in the positive electrode end cover. The seal is installed in the positive electrode liquid guide hole. The positive electrode post is installed in the positive electrode post hole. The first pressure relief valve is installed in the first pressure relief hole. The positive electrode busbar is disposed in the battery cell placement cavity, and both ends of the positive electrode busbar are respectively connected to the positive electrode post and the cell body.

[0016] In one embodiment, the negative electrode cover assembly includes a negative electrode busbar, a negative electrode post, a negative electrode end cover, a second pressure relief valve, and a second seal. The negative electrode end cover is connected to one end of the housing. The negative electrode end cover is provided with a negative electrode post hole and a second pressure relief hole that communicate with the battery cell placement cavity. The negative electrode post is installed in the negative electrode post hole. The second pressure relief valve is installed in the second pressure relief hole. The negative electrode liquid guide hole is opened in the negative electrode end cover. The second seal is installed in the negative electrode liquid guide hole. The negative electrode busbar is disposed in the battery cell placement cavity, and both ends of the negative electrode busbar are respectively connected to the negative electrode post and the cell body.

[0017] A cylindrical battery includes the high-voltage battery cell structure according to any one of the above embodiments.

[0018] Compared with the prior art, the present disclosure has at least the following advantages:

[0019] 1. For the above-mentioned high-voltage battery cell structure, at least two cell bodies are connected at both ends of the busbar connecting member, and each cell body is infiltrated in the same battery cell placement cavity. The cell bodies are connected in series in the housing, increasing the output voltage and thus reducing the cost.

[0020] 2. Each cell body of the high-voltage battery cell structure is charged and discharged using the same power, reducing the temperature rise of the high-voltage battery cell structure.

[0021] 3. When the cell body is loaded into the housing for encapsulation, the spacer is disposed on the busbar connecting member, and both sides of the spacer are in interference contact with both ends of the busbar connecting member, so that the spacer presses and fixes the cell body in the housing, making the cell body structure more compact, and further making the high-voltage battery cell structure suitable for small-sized portable products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present disclosure, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a high-voltage battery cell structure of an embodiment;

[0024] Figure 2 For Figure 1 It is a schematic structural diagram of the separator shown;

[0025] Figure 3 For Figure 1 It is a schematic structural diagram of the busbar connector shown. Detailed implementation manners

[0026] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant accompanying drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure content of the present disclosure understood more thoroughly and comprehensively.

[0027] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] To better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below with specific embodiments:

[0030] Such as Figures 1 to 3As shown, it is a high-voltage battery cell structure 10 according to an embodiment of the present disclosure, including a housing 100, a positive cover assembly 200, a negative cover assembly 300, and a cell assembly 400. The housing 100 is provided with a battery cell placement cavity 101, and the battery cell placement cavity 101 can be used to accommodate the cell assembly 400 and the electrolyte. The positive cover assembly 200 and the negative cover assembly 300 are respectively covered at both ends of the housing 100. The positive cover assembly 200 is provided with a positive liquid guide hole 201 communicating with the battery cell placement cavity 101, and the negative cover assembly 300 is provided with a negative liquid guide hole 301 communicating with the battery cell placement cavity 101. The positive liquid guide hole 201 and the negative liquid guide hole 301 can be used to inject the electrolyte, and the positive cover assembly 200 and the negative cover assembly 300 can be sealed on the housing 100 by laser welding.

[0031] Further, the cell assembly 400 further includes a cell 410, a separator 420, and a current collector connector 430. The number of cells 410 is at least two, and each cell 410 is sequentially arranged in the battery cell placement cavity 101. Both ends of the current collector connector 430 are respectively connected to one end of two different cells 410. One end of the other cell 410 is connected to the positive cover assembly 200, and the other end of the other cell 410 is connected to the negative cover assembly 300. The separator 420 is arranged on the current collector connector 430. The separator 420 is provided with a connection through groove 4201, and the current collector connector 430 passes through the connection through groove 4201. The current collector connector 430 is bent when installed in the connection through groove 4201, and the connection through groove 4201 makes the connection between the current collector connector 430 and the separator 420 tighter.

[0032] In this embodiment, the cell 410 is manufactured by winding. One cell 410 is laser welded to the negative cover assembly 300, and then the two cells 410 are respectively welded to both ends of the current collector connector 430 in series. The separator 420 is installed on the current collector connector 430, so that the separator 420 separates both ends of the current collector connector 430 and the cell 410. When the two cells 410 are installed in the housing, the separator 420 presses the two cells 410, so that the positions of the two cells 410 are fixed. The negative cover assembly 300 is sealed by laser welding. One end of the other cell 410 is laser welded to the positive cover assembly 200, and then the positive cover assembly 200 is sealed to the housing 100 by laser welding. Finally, the electrolyte is injected from one end of the positive cover assembly 200 and left to stand for formation.

[0033] The above-mentioned high-voltage battery cell structure 10 connects at least two cell bodies 410 through both ends of a current collecting connector 430. Each cell body 410 is immersed in the same battery cell placement cavity 101, and the cell bodies 410 are connected in series within the housing 100, increasing the output voltage and thus reducing the cost. Each cell body 410 of the high-voltage battery cell structure 10 is charged and discharged using the same power, reducing the temperature rise of the high-voltage battery cell structure 10. When the cell body 410 is installed in the housing 100 for encapsulation, a separator 420 is provided on the current collecting connector 430, and both sides of the separator 420 are in interference contact with both ends of the current collecting connector 430, causing the current collecting connector 430 at both ends of the separator 420 to tightly fix the cell body 410, making the structure of the cell body 410 more compact, and further making the high-voltage battery cell structure suitable for small-sized portable products.

[0034] As Figure 1 and Figure 3 , in one embodiment, the current collecting connector 430 includes a first current collecting plate 431, a second current collecting plate 432, and a connector 433. The first current collecting plate 431 is connected to one of the cell bodies 410, the second current collecting plate 432 is connected to another cell body 410, and both ends of the connector 433 are respectively connected to the first current collecting plate 431 and the second current collecting plate 432. The connector 433 passes through the connection through groove 4201. In this embodiment, the cell body 410 has a structure without an ear. Through the first current collecting plate 431 and the second current collecting plate 432, the two ends of the corresponding cell body 410 without an ear can be respectively connected, enabling the current to flow more evenly in and out of the cell body 410 through the first current collecting plate 431 and the second current collecting plate 432, thereby reducing the temperature rise inside the battery. When the current of the high-voltage battery cell structure 10 is too large, the connector 433 fuses, causing the connection between the two cell bodies 410 to be disconnected, thereby protecting the high-voltage battery cell structure 10.

[0035] As Figure 1 and Figure 2 shown, in one embodiment, the connection through groove 4201 is a through groove structure with an inclined setting. One end of the connector 433 is arranged on one side of the cell body 410, and the other end of the connector 433 is arranged on the other side of the cell body 410. In this embodiment, through the through groove structure with an inclined setting, the connector 433 is adapted to be embedded in the connection through groove 4201, and both ends of the connector 433 are bent, making the position where the connector 433 passes through the connection through groove 4201 fixed, and further making the high-voltage battery cell structure 10 more compact.

[0036] As Figure 3As shown, in one embodiment, the first current collector plate 431 is provided with a first liquid passing groove 4301, and the second current collector plate 432 is provided with a second liquid passing groove 4302. In this embodiment, the electrolyte is filled in the battery cell placement cavity 101 to soak the core body 410. Through the first liquid passing groove 4301 and the second liquid passing groove 4302, the electrolyte can smoothly enter the core body 410, enabling the two core bodies 410 to be fully soaked, thereby ensuring the rate performance and discharge capacity of the battery.

[0037] As Figure 3 shown, in one embodiment, the number of both the first liquid passing grooves 4301 and the second liquid passing grooves 4302 is multiple. The multiple first liquid passing grooves 4301 are arranged at intervals along the circumferential direction of the first current collector plate 431, and the multiple second liquid passing grooves 4302 are arranged at intervals along the circumferential direction of the second current collector plate 432. In this embodiment, through the multiple first liquid passing grooves 4301 and the second liquid passing grooves 4302, the electrolyte can flow into the core body 410 more smoothly, thereby accelerating the injection and outflow of the electrolyte, enabling the two core bodies 410 to be fully soaked, and thus ensuring the rate performance and discharge capacity of the battery.

[0038] As Figure 2 shown, in one embodiment, the separator 420 is provided with a liquid passing hole 4201. In this embodiment, during the process of injecting the electrolyte, due to the liquid passing hole 4201 provided in the separator 420, the blockage of the electrolyte flow by the separator 420 is avoided, thereby accelerating the liquid injection process of the electrolyte and enabling the electrolyte to flow smoothly between the two core bodies 410, so that the core body 410 is soaked more fully.

[0039] As Figure 1 shown, in one embodiment, the number of the core bodies 410, the separators 420, and the current collecting connectors 430 is multiple. The multiple core bodies 410 are arranged in the battery cell placement cavity 101. Both ends of each current collecting connector 430 are respectively connected to two adjacent core bodies 410. Each separator 420 is respectively arranged on the corresponding current collecting connector 430, and each current collecting connector 430 passes through the corresponding connection through groove 4201. In this embodiment, when a higher voltage is required, the number of core bodies 410 can be adjusted as needed, so that the multiple core bodies 410 are connected in series in sequence. Each core body 410 is connected by a current collecting connector 430. The separator 420 separates both ends of the corresponding current collecting connector 430, and when the core bodies 410 are installed, the multiple core bodies 410 are all pressed tightly in the housing 100.

[0040] As Figure 1As shown, in one embodiment, the positive electrode cover assembly 200 includes a positive electrode busbar 210, a positive electrode post 220, a positive electrode end cap 230, a first pressure relief valve 240, and a first seal 250. The positive electrode end cap 230 is connected to one end of the housing 100. The positive electrode end cap 230 is provided with a positive electrode post hole 2301 and a first pressure relief hole 2302 that communicate with the battery cell placement cavity 101. A positive electrode liquid guide hole 201 is provided in the positive electrode end cap 230. The first seal 250 is installed in the positive electrode liquid guide hole 201. The positive electrode post 220 is installed in the positive electrode post hole 2301. The first pressure relief valve 240 is installed in the first pressure relief hole 2302. The positive electrode busbar 210 is disposed in the battery cell placement cavity 101. Two ends of the positive electrode busbar 210 are respectively connected to the positive electrode post 220 and the cell body 410. In this embodiment, current is connected through the positive electrode post 220, the positive electrode busbar 210, and the corresponding cell body 410. The positive electrode liquid guide hole 201 is used to inject electrolyte. The first pressure relief valve 240 can quickly detect the pressure at one end of the battery cell placement cavity 101 adjacent to the positive electrode end cap 230. When the pressure in the battery cell placement cavity 101 is too high, the first pressure relief valve 240 can communicate with the outside, so that the first pressure relief valve 240 protects the high-voltage battery cell structure 10.

[0041] As Figure 1 As shown, in one embodiment, the negative electrode cover assembly 300 includes a negative electrode busbar 310, a negative electrode post 320, a negative electrode end cap 330, a second pressure relief valve 340, and a second seal 350. The negative electrode end cap 330 is connected to one end of the housing 100. The negative electrode end cap 330 is provided with a negative electrode post hole 3301 and a second pressure relief hole 3302 that communicate with the battery cell placement cavity 101. A negative electrode liquid guide hole 301 is provided in the negative electrode end cap 330. The second seal 350 is installed in the negative electrode liquid guide hole 301. The negative electrode post 320 is installed in the negative electrode post hole 3301. The second pressure relief valve 340 is installed in the second pressure relief hole 3302. The negative electrode busbar 310 is disposed in the battery cell placement cavity 101. Two ends of the negative electrode busbar 310 are respectively connected to the negative electrode post 320 and the cell body 410. In this embodiment, current is connected through the negative electrode post 320, the negative electrode busbar 310, and the corresponding cell body 410. The second pressure relief valve 340 can quickly detect the pressure at one end of the battery cell placement cavity 101 adjacent to the negative electrode end cap 330. When the pressure in the battery cell placement cavity 101 is too high, the second pressure relief valve 340 can communicate with the outside, so that the second pressure relief valve 340 protects the high-voltage battery cell structure 10.

[0042] This application also provides a cylindrical battery, including the high-voltage battery cell structure 10 in any of the embodiments. In this embodiment, through the high-voltage battery cell structure 10, a plurality of cell bodies 410 are connected in series, increasing the output voltage and reducing the pack cost. Moreover, each cell body 410 is charged and discharged using the same power, making the temperature rise of the cylindrical battery lower.

[0043] Compared with the prior art, the present disclosure has at least the following advantages:

[0044] 1. For the above-mentioned high-voltage cell structure 10 and cylindrical battery, at least two cell bodies 410 are connected at both ends of the bus bar connector 430, and each cell body 410 is infiltrated in the same cell placement cavity 101, and the cell bodies 410 are connected in series in the housing 100, increasing the output voltage and thus reducing the cost;

[0045] 2. Each cell body 410 of the high-voltage cell structure 10 is charged and discharged using the same power, reducing the temperature rise of the high-voltage cell structure 10;

[0046] 3. When the cell body 410 is loaded into the housing 100 for encapsulation, the spacer 420 is arranged on the bus bar connector 430, and both sides of the spacer 420 are in interference contact with both ends of the bus bar connector 430, so that the bus bar connectors 430 at both ends of the spacer 420 tightly fix the cell body 410, making the structure of the cell body 410 more compact, and further making the high-voltage cell structure applicable to small-sized portable products.

[0047] The above embodiments only represent several implementation manners of the present disclosure, and their descriptions are relatively specific and detailed, but should not be construed as a limitation on the scope of the disclosed patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several deformations and improvements can still be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. A high-voltage battery cell structure, comprising a shell, a positive electrode cap assembly, a negative electrode cap assembly and a core assembly, wherein the shell has a battery cell placement cavity, the positive electrode cap assembly and the negative electrode cap assembly are respectively covered at both ends of the shell, the positive electrode cap assembly has a positive electrode liquid guide hole connected to the battery cell placement cavity, and the negative electrode cap assembly has a negative electrode liquid guide hole connected to the battery cell placement cavity, characterized in that: The core assembly includes a core, a separator and a busbar connector. The number of the cores is at least two, and each of the cores is sequentially arranged in the battery cell placement cavity. The two ends of the busbar connector are respectively connected to one end of two different cores, wherein the other end of one core is connected to the positive electrode cover assembly, and the other end of the other core is connected to the negative electrode cover assembly. The separator is provided with a connecting groove, and the busbar connector is penetrated through the connecting groove. Both sides of the separator are interference-contacted with the two ends of the busbar connector.

2. The high voltage battery cell structure according to claim 1, characterized in that: The bus connector includes a first current collecting plate, a second current collecting plate and a connector, the first current collecting plate is connected to one of the core bodies, the second current collecting plate is connected to the other core body, the two ends of the connector are respectively connected to the first current collecting plate and the second current collecting plate, and the connector is inserted into the connecting groove.

3. The high voltage battery cell structure according to claim 2, characterized in that: The connecting through-slot is an inclined through-slot structure, one end of the connecting piece is arranged on one side of the core body, and the other end of the connecting piece is arranged on the other side of the core body.

4. The high voltage battery cell structure according to claim 2, characterized in that: The first current collecting plate is provided with a first liquid passing groove, and the second current collecting plate is provided with a second liquid passing groove.

5. The high voltage battery cell structure according to claim 4, characterized in that: There are multiple first liquid-passing grooves and multiple second liquid-passing grooves. The multiple first liquid-passing grooves are spaced apart along the circumference of the first current collecting disk, and the multiple second liquid-passing grooves are spaced apart along the circumference of the second current collecting disk.

6. The high voltage battery cell structure according to claim 1, characterized in that: The separator is provided with a liquid-passing hole.

7. The high voltage battery cell structure according to claim 1, characterized in that: There are multiple core bodies, separators and bus connectors. Multiple core bodies are arranged in the battery cell placement cavity. Both ends of each bus connector are respectively connected to two adjacent core bodies, and each separator is respectively arranged on a corresponding bus connector.

8. The high voltage battery cell structure according to claim 1, characterized in that: The positive electrode cap assembly includes a positive busbar, a positive electrode column, a positive terminal cap, a first pressure relief valve and a first sealing member. The positive terminal cap is connected to one end of the shell, and the positive terminal cap is provided with a positive electrode column hole and a first pressure relief hole connected to the battery cell placement cavity. The positive electrode liquid guide hole is provided in the positive terminal cap, the sealing member is installed in the positive electrode liquid guide hole, the positive electrode column is installed in the positive electrode column hole, the first pressure relief valve is installed in the first pressure relief hole, the positive busbar is arranged in the battery cell placement cavity, and the two ends of the positive busbar are respectively connected to the positive electrode column and the core body.

9. The high voltage battery cell structure according to claim 1, characterized in that: The negative electrode cap assembly includes a negative electrode busbar, a negative electrode column, a negative end cap, a second pressure relief valve and a second sealing member. The negative end cap is connected to one end of the shell. The negative end cap is provided with a negative electrode column hole and a second pressure relief hole connected to the battery cell placement cavity. The negative electrode liquid guide hole is provided in the negative end cap. The second sealing member is installed in the negative electrode liquid guide hole. The negative electrode column is installed in the negative electrode column hole. The second pressure relief valve is installed in the second pressure relief hole. The negative electrode busbar is arranged in the battery cell placement cavity. The two ends of the negative electrode busbar are respectively connected to the negative electrode column and the core body.

10. A cylindrical battery, characterized in that: A high voltage battery cell structure comprising any one of claims 1 to 9.

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