Battery

Abstract

The invention discloses a battery, and belongs to the technical field of batteries, the battery comprises a battery cell, the battery cell comprises a battery cell body, a positive tab and a negative tab, a positive electrode space is formed between the positive tab and the battery cell body, and a negative electrode space is formed between the negative tab and the battery cell body; the number of the adapter sheets is two, one adapter sheet is a positive electrode adapter sheet, the other adapter sheet is a negative electrode adapter sheet, the edge of the positive electrode adapter sheet is embedded into the positive electrode space, and the edge of the negative electrode adapter sheet is embedded into the negative electrode space; the number of the pole columns is two, one pole column is a positive pole column, and the other pole column is a negative pole column; and the top cover is provided with a positive electrode hole and a negative electrode hole. According to the battery disclosed by the invention, the space between the adapter piece and the lower plastic part can be fully utilized, the height space is saved, the space utilization rate in the battery is effectively improved, and the energy density of the battery is further improved.

Description

Technical Field

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

[0002] At present, new energy technologies are developing rapidly. As a device for energy storage, batteries are widely used in automobiles, industrial and commercial energy storage, household energy storage, and ships. The current aluminum shell battery is mainly composed of a shell, a top cover assembly, an adapter, an insulating film, a bottom support plate, and a battery cell. The top cover assembly is an important protective device for the battery. In the existing battery structure, the battery top cover assembly usually includes a positive pole, a negative pole, an explosion-proof valve and an explosion-proof patch, a top cover, a lower plastic, an injection hole, and other structures. Furthermore, the pole is connected to the top cover through a seal, a fixing, and the like. The battery cell usually includes a pole ear and a battery body. The pole ear is welded to the adapter. The pole ear is located below the adapter. The battery cell needs to bend the pole ear when it is assembled, and the pole ear occupies the space in the height direction of the battery. The lower plastic, the adapter, and other structures are located below the top cover. After the top cover is assembled with the shell, the pole ear, the lower plastic, the adapter, and other structures will occupy the internal space of the battery, reducing the space utilization rate inside the battery, thereby reducing the energy density of the battery. Summary of the invention

[0003] The present invention overcomes the deficiencies of the prior art and provides a battery to solve the problems existing in the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a battery comprising

[0005] A battery cell, wherein the battery cell comprises a battery cell body, a positive electrode ear and a negative electrode ear, a positive electrode space is formed between the positive electrode ear and the battery cell body, and a negative electrode space is formed between the negative electrode ear and the battery cell body;

[0006] A transfer sheet, wherein the number of the transfer sheets is two, one of the transfer sheets is a positive transfer sheet, and the other transfer sheet is a negative transfer sheet, the edge of the positive transfer sheet is embedded in the positive electrode space, and the edge of the negative transfer sheet is embedded in the negative electrode space;

[0007] A pole, wherein the number of the poles is two, one of the poles is a positive pole, and the other pole is a negative pole, the positive pole is connected to the positive electrode adapter, and the negative pole is connected to the negative electrode adapter;

[0008] A top cover is provided with a positive electrode hole and a negative electrode hole, wherein the positive electrode hole corresponds to the position of the positive electrode column, and the negative electrode hole corresponds to the position of the negative electrode column.

[0009] In a preferred embodiment of the present invention, butterfly welding is adopted between the two battery cells, the two battery cells are distributed on both sides of the positive electrode adapter plate and the negative electrode adapter plate, the positive electrode ear of the battery cell is welded to the positive electrode adapter plate, and the negative electrode ear of the battery cell is welded to the negative electrode adapter plate.

[0010] In a preferred embodiment of the present invention, the negative electrode adapter plate is provided with a positioning hole and a transfer boss, the positive electrode adapter plate is provided with a positioning hole, a transfer boss and a current limiting hole, and the pole is welded to the transfer boss.

[0011] In a preferred embodiment of the present invention, a lower sealing ring is disposed on the transfer boss, and the pole is coaxially disposed with the transfer boss and the lower sealing ring.

[0012] In a preferred embodiment of the present invention, a positive electrode groove and a negative electrode groove are provided on the top cover, the positive electrode groove corresponds to the position of the positive electrode hole, and the negative electrode groove corresponds to the position of the negative electrode hole. A retaining ring and an upper sealing ring are provided at the positions of the positive electrode groove and the negative electrode groove, and the upper sealing ring cooperates with the lower sealing ring to seal the positive electrode hole or the negative electrode hole.

[0013] In a preferred embodiment of the present invention, the stop ring is attached to the pole via an upper plastic piece, the stop ring and the upper plastic piece form a fixing portion, and the stop ring and the upper plastic piece are buckled to fix the pole.

[0014] In a preferred embodiment of the present invention, a lower plastic part is provided between the top cover and the battery cell, and a first through hole and a second through hole are provided on the lower plastic part, wherein the first through hole corresponds to the position of the positive electrode column, and the second through hole corresponds to the position of the negative electrode column.

[0015] In a preferred embodiment of the present invention, the lower plastic part is provided with a rivet joint on one side and a side stop boss and a center stop boss on the other side, the rivet joint corresponds to the position of the top cover, and the side stop boss and the center stop boss correspond to the position of the battery cell.

[0016] In a preferred embodiment of the present invention, the distance between the lower plastic part and the adapter plate is 0.5-2 mm.

[0017] In a preferred embodiment of the present invention, it further comprises an aluminum shell, the battery core is located in the aluminum shell, and the surface of the battery core is covered with an insulating film.

[0018] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0019] The battery of the present invention reserves a 1-2mm space between the adapter and the lower plastic part to prevent interference between the adapter and the lower plastic part. After the battery cell and the adapter are welded, the core is assembled, and then the positive electrode column and the positive electrode hole, and the negative electrode column and the negative electrode hole are docked and installed. The positive electrode ear and the negative electrode ear are both located between the adapter and the lower plastic. The space between the adapter and the lower plastic part can be fully utilized, saving height space, effectively improving the space utilization rate inside the battery, and then improving the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0022] Figure 2 A top view of a preferred embodiment of the present invention;

[0023] Figure 3 for Figure 2 Sectional view of the AA plane;

[0024] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0025] Figure 5 This is a schematic diagram of the structure of a battery cell according to a preferred embodiment of the present invention;

[0026] Figure 6 This is a schematic structural diagram of a negative electrode adapter sheet according to a preferred embodiment of the present invention;

[0027] Figure 7 This is a schematic structural diagram of a positive electrode adapter sheet according to a preferred embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the top cover of a preferred embodiment of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of a plastic part in a preferred embodiment of the present invention;

[0030] Fig.10 This is a schematic structural diagram of two battery cells welded in a preferred embodiment of the present invention;

[0031] In the figure: 10, battery cell; 11, battery cell body; 12, positive ear; 13, negative ear; 20, adapter; 21, positioning hole; 22, adapter boss; 23, current limiting hole; 30, pole; 40, top cover; 41, positive hole; 42, negative hole; 43, positive groove; 44, negative groove; 50, lower sealing ring; 60, stop ring; 70, upper sealing ring; 80, upper plastic part; 90, lower plastic part; 91, first through hole; 92, second through hole; 93, rivet head; 94, side stop boss; 95, center stop boss; 100, aluminum shell. DETAILED DESCRIPTION

[0032] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0033] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The present embodiment provides a battery, which reserves a space of 0.5-2mm between the adapter 20 and the lower plastic part 90 to prevent interference between the adapter 20 and the lower plastic part 90. After the battery cell 10 and the adapter 20 are welded, the cores are combined, and then the positive electrode column 30 and the positive electrode hole 41, and the negative electrode column 30 and the negative electrode hole 42 are docked and installed. The positive electrode ear 12 and the negative electrode ear 13 are both located between the adapter 20 and the lower plastic. The space between the adapter 20 and the lower plastic part 90 can be fully utilized, saving height space, effectively improving the space utilization rate inside the battery, and thus improving the energy density of the battery.

[0035] Combination Figures 1 to 10As shown, the battery of this embodiment is composed of a top cover 40, a battery cell 10, a positive electrode column 30, a negative electrode column 30, a retaining ring 60, an upper plastic part 80, an upper sealing ring 70, a lower plastic part 90, a positive electrode adapter plate 20, a negative electrode adapter plate 20, a lower sealing ring 50, an insulating film and an aluminum shell 100. The following introduces the assembly scheme of each structural component and the battery.

[0036] The top cover 40 is provided with a positive electrode hole 41, a negative electrode hole 42, a positive electrode groove 43, a negative electrode groove 44, an explosion-proof valve hole, a liquid injection hole, a top cover riveting hole and a top cover chamfer;

[0037] The pole 30 is provided with a pole hole, a pole groove, a pole first step and a pole second step, and the positive pole 30 has the same structure as the negative pole 30;

[0038] The stop ring 60 is provided with a stop ring pole hole, a stop ring first step, a stop ring second step and a stop ring groove;

[0039] The upper plastic part 80 is provided with an upper plastic part pole hole, an upper plastic part first step, an upper plastic part second step and an upper plastic part groove;

[0040] The fixing assembly is composed of a stop ring 60 and an upper plastic part 80. The upper plastic part 80 is placed at the lower part of the stop ring 60. The upper surface of the second step of the upper plastic part overlaps with the lower surface of the first step of the stop ring. The outer surface of the second step side of the upper plastic part overlaps with the inner surface of the first step side of the stop ring.

[0041] The upper sealing ring 70 is provided with an upper sealing ring pole hole;

[0042] The lower plastic part 90 is provided with a first through hole 91, a second through hole 92, a rivet head 93, a side stop boss 94 and a center stop boss 95;

[0043] Assembly instructions for top cover 40:

[0044] The positive electrode column 30 is placed in the groove of the upper plastic part of the fixing assembly, the upper surface of the first step of the positive electrode column coincides with the lower surface of the first step of the upper plastic part, and the side surfaces coincide, and the second step of the positive electrode column coincides with the lower surface of the second step of the upper plastic part; the assembled positive electrode column 30 and the fixing assembly are installed in the positive electrode groove 43 of the top cover 40, the upper sealing ring 70 is placed between the bottom of the positive electrode column 30 and the positive electrode groove 43 of the top cover 40, the pole hole of the positive electrode column 30, the pole hole of the upper sealing ring, and the positive pole hole 41 of the top cover 40 are coaxial; the upper surface of the second step of the stop ring of the fixing assembly is connected to the surface of the top cover 40, thereby fixing the positive electrode column 30, the fixing assembly, and the upper sealing ring 70.

[0045] The negative electrode column 30 is placed in the groove of the upper plastic part of the fixing assembly, the upper surface of the first step of the negative electrode column coincides with the lower surface of the first step of the upper plastic part, and the side surfaces coincide, and the second step of the negative electrode column coincides with the lower surface of the second step of the upper plastic part; the assembled negative electrode column 30 and the fixing assembly are installed in the negative electrode groove 44 of the top cover 40, the upper sealing ring 70 is placed between the bottom of the negative electrode column 30 and the positive electrode groove 43 of the top cover 40, the negative electrode column hole of the negative electrode column 30, the upper sealing ring electrode hole, and the negative electrode hole 42 of the top cover 40 are coaxial; the upper surface of the second step of the stop ring of the fixing assembly is connected to the surface of the top cover 40, thereby fixing the negative electrode column 30, the fixing assembly, and the upper sealing ring 70.

[0046] The rivet head 93 of the lower plastic part 90 is inserted into the riveting hole of the top cover 40 , the first through hole 91 of the lower plastic part 90 is coaxial with the positive hole 41 of the top cover 40 , and the second through hole 92 of the lower plastic part 90 is coaxial with the negative hole 42 of the top cover 40 .

[0047] The negative electrode column 30 is provided with a negative electrode column positioning hole, a negative electrode column aluminum column, a negative electrode column copper column and a negative electrode column groove;

[0048] The negative electrode adapter 20 is provided with a process hole, an adapter boss 22 and a positioning hole 21;

[0049] The lower sealing ring 50 is provided with a lower sealing ring boss and a lower sealing ring base;

[0050] The negative electrode column 30 is welded on the transfer boss 22 of the negative electrode transfer plate 20 , and the negative electrode column 30 is coaxial with the transfer boss 22 of the negative electrode transfer plate 20 . The lower sealing ring 50 is installed on the transfer boss 22 , and the lower sealing ring 50 is coaxial with the transfer boss 22 . The lower sealing ring base coincides with the transfer boss 22 .

[0051] The positive electrode column 30 is provided with a positive electrode column positioning hole and a positive electrode column groove;

[0052] The positive electrode adapter 20 is provided with a current limiting hole 23, a positioning hole 21, a process hole and an adapter boss 22;

[0053] The following are the assembly operations of battery cell 10:

[0054] The positive electrode column 30 is welded on the transfer boss 22 of the positive electrode adapter 20, the positive electrode column 30 is coaxial with the transfer boss 22 of the positive electrode adapter 20, the lower sealing ring 50 is installed on the transfer boss 22 of the positive electrode adapter 20, the lower sealing ring 50 is coaxial with the transfer boss 22 of the positive electrode adapter 20, and the lower sealing ring base coincides with the transfer boss 22 of the positive electrode adapter 20;

[0055] The battery cell 10 of the present embodiment includes a battery cell body 11 , a positive electrode tab 12 and a negative electrode tab 13 . The positive electrode tab 12 and the negative electrode tab 13 of the battery cell 10 are firstly subjected to ultrasonic flat-tooth welding and then the tabs are cut to obtain the battery cell 10 .

[0056] In this embodiment, the connection method of the battery cell 10 with the positive electrode adapter 20, the positive electrode column 30, the lower sealing ring 50, the negative electrode adapter 20 and the negative electrode column 30 adopts a butterfly welding scheme. The two battery cells 10 are distributed on both sides of the positive electrode adapter 20 and the negative electrode adapter 20. The positive electrode ear 12 of the battery cell 10 is welded to the positive electrode adapter 20, and the negative electrode ear 13 of the battery cell 10 is welded to the negative electrode adapter 20. Before welding, the positive electrode adapter 20 is positioned through the positioning hole 21. Position the positive electrode adapter 20, position the negative electrode adapter 20 through the positioning hole 21 of the negative electrode adapter 20, and then use insulating tape to cover the weld mark, avoiding the lower sealing ring 50, the transfer boss 22 of the positive electrode adapter 20 and the transfer boss 22 of the negative electrode adapter 20, and merge the two battery cells 10 after the welding mark is affixed with the insulating tape. The two battery cells 10 are aligned left and right and up and down, and the insulating tape is affixed to the sides and bottom of the battery cells 10 to fix them, and then the top cover 40 is welded.

[0057] Top cover 40 welding: positive pole 30 is coaxial with the positive pole hole and enters the positive pole hole, the groove of the positive lower pole is flush with the groove of the positive pole, laser is used to connect the groove of the positive lower pole with the groove of the positive pole, and enters the negative pole hole, the groove of the negative lower pole is flush with the groove of the negative pole, and laser is used to connect the groove of the negative lower pole with the groove of the negative pole.

[0058] After the top cover 40 is welded, it is wrapped with an insulating film, the insulating film is used to cover the battery cell 10, and the side and bottom are fixed with insulating tape.

[0059] After the insulating film is coated, the battery cell 10 coated with the insulating film is installed in the aluminum shell 100 , and the edge of the aluminum shell 100 is connected with the chamfer of the periphery of the top cover 40 , and the chamfer of the periphery of the top cover 40 can improve the welding mark bulge of the aluminum shell 100 .

[0060] In this embodiment, the battery cell 10 of this embodiment includes a battery cell body 11, a positive electrode ear 12 and a negative electrode ear 13, a positive electrode space is formed between the positive electrode ear 12 and the battery cell body 11, a negative electrode space is formed between the negative electrode ear 13 and the battery cell body 11, the edge of the positive electrode adapter 20 is embedded in the positive electrode space, the edge of the negative electrode adapter 20 is embedded in the negative electrode space, the positive electrode column 30 is connected to the positive electrode adapter 20, the negative electrode column 30 is connected to the negative electrode adapter 20, the edge of the positive electrode adapter 20 of this embodiment is located in the positive electrode space, and is welded to the positive electrode ear 12. The positive electrode adapter 20 is connected to the battery cell 10, and the edge of the negative electrode adapter 20 is located in the negative electrode space and is welded to the negative electrode ear 13, so that the negative electrode adapter 20 is connected to the battery cell 10, that is, the edge of the positive electrode adapter 20 is located below the positive electrode ear 12, and the edge of the negative electrode adapter 20 is located below the negative electrode ear 13. The adapter 20 of the original battery is located above the ear. Therefore, the battery of this embodiment can make effective use of the space of the positive electrode space and the negative electrode space, effectively improve the space utilization rate inside the battery, and then improve the energy density of the battery.

[0061] Furthermore, a positive electrode groove 43 and a negative electrode groove 44 are provided on the top cover 40 of the present embodiment. The positive electrode groove 43 corresponds to the position of the positive electrode hole 41, and the negative electrode groove 44 corresponds to the position of the negative electrode hole 42. A stop ring 60 and an upper sealing ring 70 are provided at the positions of the positive electrode groove 43 and the negative electrode groove 44. The upper sealing ring 70 cooperates with the lower sealing ring 50 to seal the positive electrode hole 41 or the negative electrode hole 42. The stop ring 60 is attached to the pole 30 through the upper plastic part 80. The stop ring 60 and the upper plastic part 80 form a fixing part. The stop ring 60 and the upper plastic part 80 are buckled to fix the pole 30.

[0062] In the present embodiment, a lower plastic part 90 is arranged between the top cover 40 and the battery cell 10 of the present embodiment, and a first through hole 91 and a second through hole 92 are arranged on the lower plastic part 90, the first through hole 91 corresponds to the position of the positive electrode column 30, and the second through hole 92 corresponds to the position of the negative electrode column 30, a rivet head 93 is arranged on one side of the lower plastic part 90, and a side stop boss 94 and a center stop boss 95 are arranged on the other side, the rivet head 93 corresponds to the position of the top cover 40, the side stop boss 94 and the center stop boss 95 correspond to the position of the battery cell 10, the rivet head 93 of the lower plastic part 90 is inserted into the concave hole of the top cover 40, the first through hole 91 of the lower plastic part 90 is coaxially arranged with the positive electrode hole 41 of the top cover 40, and the second through hole 92 of the lower plastic part 90 is coaxially arranged with the negative electrode hole 42 of the top cover 40.

[0063] During the assembly process of the battery of this embodiment, a butterfly welding scheme is used to weld the battery cell 10 with the positive electrode adapter 20, the positive electrode column 30, the lower sealing ring 50, the negative electrode adapter 20, the negative electrode column 30, and the lower sealing ring 50. The two battery cells 10 are distributed on both sides of the positive electrode adapter 20 and the negative electrode adapter 20. The positive electrode ear 12 of the battery cell 10 is welded to the positive electrode adapter 20, and the negative electrode ear 13 is welded to the negative electrode adapter 20. Before welding, the positive electrode adapter 20 is positioned through the positioning hole 21 on the positive electrode adapter 20, and the negative electrode adapter 20 is positioned through the positioning hole 21 on the negative electrode adapter 20. After the welding is completed, the welding mark is covered with insulating tape, and the lower sealing ring 50, the transfer boss 22 of the positive electrode adapter 20 and the transfer boss 22 of the negative electrode adapter 20 need to be avoided. After the welding mark is affixed with the insulating tape, the two battery cells 10 are merged, and the two battery cells 1 are 0 is aligned left and right and up and down, insulating tape is attached to the sides and bottom of the battery cell 10, and the top cover 40 is welded after being fixed. The positive electrode column 30 is coaxially arranged with the positive electrode hole 41 of the top cover 40 and enters the positive electrode hole 41. The bottom of the positive electrode column 30 is flush with the positive electrode groove 43 of the top cover 40, and laser welding is adopted for the bottom of the positive electrode column 30 and the positive electrode groove 43; the negative electrode column 30 is coaxially arranged with the negative electrode hole 42 of the top cover 40 and enters the negative electrode hole 42. The bottom of the negative electrode column 30 is flush with the negative electrode groove 44 of the top cover 40, and the bottom of the negative electrode column 30 and the negative electrode groove 44 are welded by laser. After the welding of the top cover 40 is completed, the battery cell 10 is covered with an insulating film, and the side and the bottom are fixed with insulating tape, and then the battery cell 10 covered with the insulating film is installed in the aluminum shell 100, and the edge of the aluminum shell 100 is connected with the chamfer around the top cover 40. The chamfer around the top cover 40 can improve the weld mark bulge of the aluminum shell 100.

[0064] In summary, the battery of this embodiment reserves a space of 0.5-2mm between the adapter 20 and the lower plastic part 90 to prevent interference between the adapter 20 and the lower plastic part 90. After the battery cell 10 and the adapter 20 are welded, the cores are combined, and then the positive electrode column 30 and the positive electrode hole 41, and the negative electrode column 30 and the negative electrode hole 42 are docked and installed. The positive electrode ear 12 and the negative electrode ear 13 are both located between the adapter 20 and the lower plastic. The space between the adapter 20 and the lower plastic part 90 can be fully utilized, saving height space, effectively improving the space utilization inside the battery, and thus improving the energy density of the battery.

[0065] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems or devices discussed above are all examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from the order described, and / or various stages may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations. Different aspects and elements of the configurations may be combined in a similar manner. In addition, with the development of technology, many elements are merely examples and do not limit the scope of the present disclosure or claims.

[0066] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including implementations. However, the configurations can be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. This description provides only example configurations and does not limit the scope, applicability, or configurations of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0067] In addition, although each operation may describe the operation as a sequential process, many operations may be performed in parallel or simultaneously. In addition, the order of the operations may be rearranged. A process may have additional steps. In addition, examples of methods may be implemented by hardware, software, firmware, middleware, code, hardware description language, or any combination thereof. When implemented in software, firmware, middleware, or code, program code or code segments for performing the necessary tasks may be stored in a non-transitory computer-readable medium such as a storage medium, and the described tasks are performed by a processor.

[0068] In summary, it is intended that the above detailed description is considered to be exemplary rather than restrictive, and it should be understood that the claims (including all equivalents) are intended to limit the spirit and scope of the present invention. The above embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the content of the record of the present invention, the technician can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall into the scope limited by the claims of the present invention.

Claims

1. A battery, characterized in that: include A battery cell (10), the battery cell (10) comprising a battery cell body (11), a positive electrode ear (12) and a negative electrode ear (13), a positive electrode space being formed between the positive electrode ear (12) and the battery cell body (11), and a negative electrode space being formed between the negative electrode ear (13) and the battery cell body (11); A transfer sheet (20), wherein the number of the transfer sheets (20) is two, one of the transfer sheets (20) is a positive transfer sheet (20), and the other of the transfer sheets (20) is a negative transfer sheet (20), an edge of the positive transfer sheet (20) is embedded in the positive electrode space, and an edge of the negative transfer sheet (20) is embedded in the negative electrode space; A pole (30), wherein the number of the poles (30) is two, one of the poles (30) is a positive pole (30), and the other pole (30) is a negative pole (30), the positive pole (30) is connected to the positive electrode adapter (20), and the negative pole (30) is connected to the negative electrode adapter (20); A top cover (40), wherein a positive electrode hole (41) and a negative electrode hole (42) are provided on the top cover (40), wherein the positive electrode hole (41) corresponds to the position of the positive electrode column (30), and the negative electrode hole (42) corresponds to the position of the negative electrode column (30).

2. A battery according to claim 1, characterized in that: Butterfly welding is adopted between the two battery cells (10), and the two battery cells (10) are distributed on both sides of the positive electrode adapter plate (20) and the negative electrode adapter plate (20). The positive electrode ear (12) of the battery cell (10) is welded to the positive electrode adapter plate (20), and the negative electrode ear (13) of the battery cell (10) is welded to the negative electrode adapter plate (20).

3. A battery according to claim 1, characterized in that: The negative electrode adapter plate (20) is provided with a positioning hole (21) and a transfer boss (22), the positive electrode adapter plate (20) is provided with a positioning hole (21), a transfer boss (22) and a current limiting hole (23), and the pole (30) is welded to the transfer boss (22).

4. A battery according to claim 3, characterized in that: A lower sealing ring (50) is arranged on the transfer boss (22), and the pole (30), the transfer boss (22) and the lower sealing ring (50) are arranged coaxially.

5. A battery according to claim 4, characterized in that: The top cover (40) is provided with a positive electrode groove (43) and a negative electrode groove (44); the positive electrode groove (43) corresponds to the position of the positive electrode hole (41); the negative electrode groove (44) corresponds to the position of the negative electrode hole (42); a stop ring (60) and an upper sealing ring (70) are provided at the positions of the positive electrode groove (43) and the negative electrode groove (44); the upper sealing ring (70) cooperates with the lower sealing ring (50) to seal the positive electrode hole (41) or the negative electrode hole (42).

6. A battery according to claim 5, characterized in that: The stop ring (60) is fitted to the pole (30) via an upper plastic part (80), the stop ring (60) and the upper plastic part (80) form a fixing portion, and the stop ring (60) and the upper plastic part (80) are buckled to fix the pole (30).

7. A battery according to claim 1, characterized in that: A lower plastic part (90) is arranged between the top cover (40) and the battery cell (10), and a first through hole (91) and a second through hole (92) are arranged on the lower plastic part (90), wherein the first through hole (91) corresponds to the position of the positive electrode column (30), and the second through hole (92) corresponds to the position of the negative electrode column (30).

8. A battery according to claim 7, characterized in that: The lower plastic part (90) is provided with a rivet joint (93) on one side and a side stop boss (94) and a center stop boss (95) on the other side. The rivet joint (93) corresponds to the position of the top cover (40), and the side stop boss (94) and the center stop boss (95) correspond to the position of the battery cell (10).

9. A battery according to claim 7, characterized in that: The distance between the lower plastic part (90) and the adapter plate (20) is 0.5-2 mm.

10. A battery according to claim 1, characterized in that: It also comprises an aluminum shell (100), the battery core (10) is located in the aluminum shell (100), and the surface of the battery core (10) is covered with an insulating film.

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