Battery and welding tool

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and a welding tool, the battery comprises a shell, a battery cell, a pole and an adapter piece, the shell comprises a first shell wall, and the battery cell is accommodated in the shell; the first shell wall is provided with a convex hull structure protruding in the direction away from the battery cell, a concave storage space is formed in the position, corresponding to the convex hull structure, of one face, facing the battery cell, of the first shell wall, and a mounting hole communicated with the storage space is formed in the convex hull structure; the pole is arranged in the mounting hole and is in insulation connection with the convex hull structure, the adapter plate is used for being connected with a tab led out from a battery cell and is used for being connected with the pole, and the accommodating space is used for accommodating the whole adapter plate; the technical problem of how to improve the utilization rate of the internal space of the battery to improve the electric quantity and the energy density of the battery is mainly solved.

Description

Technical Field

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

[0002] At present, the outer shell of a lithium-ion battery includes a shell and a top cover, wherein the battery cell is accommodated in the shell, and the top cover is used to seal the opening on the shell. The top cover is also used to lead out the positive or negative electrode of the battery cell. Specifically, the existing top cover usually includes a pole boss, a lower plastic part and an adapter plate. The current pole boss and adapter plate occupy more space in the height direction, so that there will be a large gap between the top surface of the battery cell and the bottom surface of the top cover, thereby resulting in a waste of the internal space of the shell, that is, the utilization rate of the internal space of the battery is low, so that the power of the battery under a certain volume is limited, and the energy density of the battery cannot be further improved.

[0003] Therefore, there is a need to improve the existing technology. Utility Model Content

[0004] The utility model provides a battery and a welding tool, which mainly solve the technical problem of how to improve the utilization rate of the internal space of the battery to increase the battery power and energy density.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A battery comprises a housing, a battery cell, a terminal and a switching piece, wherein the housing comprises a first housing wall and the battery cell is accommodated in the housing;

[0007] A convex structure protruding in a direction away from the battery cell is provided on the first shell wall, and a recessed storage space is provided on a side of the first shell wall facing the battery cell at a position corresponding to the convex structure. A mounting hole connected to the storage space is provided on the convex structure, the pole is arranged in the mounting hole and is insulated and connected to the convex structure, the adapter is used to connect to the pole ear led out from the battery cell and to connect to the pole, and the storage space is used to accommodate the entire adapter.

[0008] In one of the technical solutions, the adapter includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is used to connect to the pole ear led out from the battery cell, and the second connecting portion is used to connect to the pole. When the adapter is connected to the pole, the first connecting portion and the second connecting portion are arranged adjacent to each other along the first direction of the first shell wall.

[0009] In one of the technical solutions, the top surface of the first connecting portion is used for connection of the tab, and there is a gap between the side of the first connecting portion facing away from the battery cell and the bottom surface of the storage space, and the gap is used to accommodate the tab connected to the top surface of the first connecting portion.

[0010] In one of the technical solutions, a through welding hole is provided on the pole, and an upwardly protruding protrusion is provided on the second connecting portion. The protrusion is inserted into the welding hole and is used for welding with the pole.

[0011] In one of the technical solutions, the pole is a negative pole, and the pole includes a connected pole body and a base, the base is provided with the welding hole, the pole body is connected to the top of the base and the welding hole is exposed, and the pole body and the base are both insulated and connected to the convex structure.

[0012] In one of the technical solutions, the pole is a positive pole, and the pole includes an integrated pole body and a base, the base is provided with the welding hole, the pole body is connected to the top of the base and the welding hole is exposed, the pole body and the base are both insulated and connected to the convex structure, and the protrusion is connected to the pole body or the base.

[0013] In one technical solution, an insulating member is provided on the outer periphery of the pole, and the insulating member is used to insulate and separate the pole from the first shell wall. The outer edge of the base protrudes relative to the pole body and abuts against the insulating member.

[0014] In one of the technical solutions, an insulating layer is provided on a side of the adapter facing the battery core, and the insulating layer is also accommodated in the receiving space.

[0015] In one of the technical solutions, the battery also includes a plastic part arranged on the side of the first shell wall facing the battery cell, and the plastic part is provided with a protruding block structure that protrudes upward and is accommodated in the accommodation space at a position corresponding to the accommodation space, and the protruding block structure is provided with a recessed avoidance groove on the side facing the battery cell, and the top of the protruding block structure is provided with an avoidance hole downwardly connected to the avoidance groove, and the avoidance groove is also used to accommodate the adapter plate, and the avoidance hole is used to avoid mutual welding of the pole and the adapter plate.

[0016] In one of the technical solutions, the top cover includes two poles and two adapter plates, and two mounting holes are provided on the convex structure. One of the poles is inserted into one of the mounting holes, and the other pole is inserted into the other mounting hole. One of the adapter plates is used to connect with the positive electrode ear and one of the poles, and the other adapter plate is used to connect with the negative electrode ear and the other pole. The storage space is used to accommodate two adapter plates at the same time.

[0017] In one technical solution, the housing includes a shell and a top cover, the battery cell is accommodated in the shell, the top cover seals the notch of the shell, and the top cover includes the first shell wall.

[0018] In one technical solution, the battery further includes an explosion-proof valve provided on the first shell wall, wherein the length direction of the explosion-proof valve points to a second direction, and the second direction is not collinear with the first direction.

[0019] In one of the technical solutions, the convex structure includes a first convex structure and a second convex structure, the length of the first convex structure extends along the first direction, the second convex structure is arranged in the middle area of ​​the first convex structure, and the length of the second convex structure extends along the second direction, the pole is arranged at the end of the first convex structure, and the explosion-proof valve is arranged at the second convex structure.

[0020] The present application also provides a welding tool, which is used before the welding operation between the battery cell and the pole of the above-mentioned battery. The welding tool includes a support plate and two bases. The two bases are used to be arranged on opposite sides of the battery cell to jointly limit the position of the battery cell. The support plate is used to extend between the top surface of the battery cell and the adapter plate, so that the support plate can be used to support the adapter plate.

[0021] Compared with the prior art, the battery provided by the present invention has at least the following beneficial effects:

[0022] This solution provides a convex structure that protrudes away from the battery cell on the first shell wall of the shell, so that there is more space to hollow out on the side of the first shell wall facing the battery cell and form a storage space with sufficient depth. By accommodating the entire existing adapter plate in this storage space, more height space can be freed up for the battery cell. Moreover, since the entire adapter plate is accommodated in the storage space, the tabs led out from the battery cell can also be accommodated in this storage space after being connected to the adapter plate, thereby further freeing up more space for the battery cell in the height direction, greatly improving the space utilization inside the battery, and thus improving the battery power and energy density. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 work.

[0024] Figure 1 A schematic structural diagram of a battery provided in Example 1 of the present application;

[0025] Figure 2 for Figure 1 An exploded view of the battery shown;

[0026] Figure 3 for Figure 1 a cross-sectional view of the battery shown;

[0027] Figure 4 for Figure 3 A partial enlarged view of the negative pole at position A in the middle;

[0028] Figure 5 for Figure 3 A partial enlarged view of the positive column at position B in the middle;

[0029] Figure 6 A schematic diagram of the structure of the top cover provided in Example 1 of the present application when viewed from above;

[0030] Figure 7 This is an exploded view of the top cover provided in Example 1 of the present application when viewed from above;

[0031] Figure 8 This is an exploded view of the structure of the top cover provided in Example 1 of the present application when viewed from above;

[0032] Figure 9 A schematic diagram of the structure of the welding tool provided in Example 2 of the present application after cooperating with the battery cell and the top cover 3;

[0033] Figure 10 for Figure 9 a cross-sectional view of the structure shown;

[0034] Figure 11 for Figure 10 A partial enlarged view of point C in the middle.

[0035] Reference numerals:

[0036] 10. Shell; 1. Shell; 11. Mounting slot; 2. Battery cell; 21. Tab;

[0037] 3. Top cover; 31. First shell wall; 311. Mounting hole; 312. Bump structure; 3121. First bump; 3122. Second bump; 313. Storage space; 314. Gap; 32. Pole; 321. Welding hole; 322. Pole body; 323. Base; 33. Adapter; 331. First connecting portion; 332. Second connecting portion; 333. Raised portion; 34. Insulator; 35. Insulating layer; 36. Plastic part; 361. Bump structure; 362. Avoidance groove; 363. Avoidance hole; 364. Guide groove;

[0038] 4. Support plate; 5. Base; 6. Explosion-proof valve. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application 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 this application and are not intended to limit this application.

[0040] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms, "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0044] Example 1

[0045] Please also refer to Figures 1 to 8The present invention provides a battery according to an embodiment of the present invention. The battery mainly includes a shell 10, a battery cell 2, a terminal 32 and a transfer plate 33. The battery cell 2 is accommodated in the interior of the shell 10. The shell 10 includes a first shell wall 31. The first shell wall 31 is provided with a convex structure 312 protruding in a direction away from the battery cell 2. A concave receiving space 313 is provided on the side of the first shell wall 31 facing the battery cell 2 at a position corresponding to the convex structure 312. The convex structure 312 is provided with a receiving space 313. The mounting hole 311 is connected to the above-mentioned storage space 313. The above-mentioned pole 32 is arranged in the mounting hole 311 and is insulated and connected to the convex structure 312 through an insulating member 34. The adapter 33 is used to weld the tab 21 led out from the battery cell 2. The adapter 33 is also welded to the pole 32, so that the polarity on the battery cell 2 can be led to the pole 32 through the adapter 33. In addition, the entire adapter 33 is accommodated in the above-mentioned storage space 313. Specifically, this solution provides a raised convex structure 312 on the first shell wall 31 of the shell 10, so that the side of the first shell wall 31 facing the battery cell 2 can have more space to be hollowed out and form a sufficiently deep storage space 313. This solution also accommodates the above-mentioned adapter plate 33 entirely within the storage space 313, thereby freeing up more height space for the battery cell 2. Moreover, since the entire adapter plate 33 is accommodated within the storage space 313, the tab 21 extending from the battery cell 2 can also be accommodated within the storage space 313 after being connected to the adapter plate 33, thereby further freeing up more space for the battery cell 2 in the height direction, significantly improving the space utilization inside the battery, and thus increasing the battery's power and energy density. In fact, this solution designs the top surface of the first shell wall 31 to be as close as possible to the top surface of the pole 32, or even flush with the top surface of the pole 32, so that the bottom surface of the first shell wall 31 can have more space to be hollowed out and form the above-mentioned sufficiently deep storage space 313. Among them, the first shell wall 31 can be stamped by a stamping process to form the above-mentioned convex structure 312 and the receiving space 313 on the first shell wall 31 at the same time, or the above-mentioned convex structure 312 and the receiving space 313 can be processed on the first shell wall 31 in sequence by a tool cutting process.

[0046] Among them, the shell 10 includes a shell 1 and a top cover 3. The shell 1 is provided with a mounting groove 11 for accommodating the battery cell 2. The number of the battery cell 2 can be one or more. When there are multiple battery cells 2, the multiple battery cells 2 can be connected in parallel or in series. All battery cells 2 are accommodated in this mounting groove 11. Among them, the top cover 3 is used to seal the notch of the mounting groove 11. The top cover 3 preferably includes the above-mentioned first shell wall 31, that is, the above-mentioned pole 32 is equivalent to being connected to the top cover 3.

[0047] Please also refer to Figure 4 、 Figure 6 and Figure 7The adapter 33 specifically includes a first connecting portion 331 and a second connecting portion 332 connected to each other, wherein the first connecting portion 331 is used to weld to the pole lug 21 on the battery cell 2, and the second connecting portion 332 is used to weld to the pole 32. When the adapter 33 is connected to the pole 32, the first connecting portion 331 and the second connecting portion 332 are arranged adjacent to each other along the first direction of the first shell wall 31, so that the pole 32 and the pole lug 21 welded on the first connecting portion 331 do not occupy the same height space, that is, the pole 32 and the pole lug 21 are staggered along the direction of the first shell wall 31. At this time, it is easier to achieve the purpose of being able to accommodate the pole lug 21 in the storage space 313 when the adapter 33 is entirely accommodated in the storage space 313, thereby helping to improve the space utilization inside the battery. When the battery is a square battery, the shape of the first shell wall 31 is also square, and the above-mentioned first direction can be the length direction of the first shell wall 31 (that is, Figure 7 X direction in the figure); when the battery is a cylindrical battery, the outer shape of the first shell wall 31 is circular, and the above-mentioned first direction is equivalent to the radial direction of the first shell wall 31.

[0048] Please refer to the Figure 4 、 Figure 6 and Figure 7 The top surface of the first connecting portion 331 is used for welding the pole tab 21 of the battery cell 2. In fact, after the pole tab 21 on the battery cell 2 and the first connecting portion 331 are welded, the pole tab 21 on the battery cell 2 is C-shaped and wraps the first connecting portion 331. In addition, there is a gap 314 between the top surface of the first connecting portion 331 and the bottom surface of the storage space 313. This gap 314 is used to accommodate the pole tab 21 connected to the top surface of the first connecting portion 331. Through such a design, when the top cover 3 seals the notch of the mounting groove 11, the pole tab 21 can be accommodated in the storage space 313, that is, no space for the pole tab 21 to bend does not need to be reserved between the top cover 3 and the top surface of the battery cell 2, thereby freeing up more height space for the battery cell 2 to improve the space utilization inside the battery, thereby improving the battery power and energy density. The above-mentioned structural design of the present solution can reduce and shorten the distance between the top cover 3 and the top surface of the battery cell 2, and can even make the top cover 3 directly contact the top surface of the battery cell 2. In this solution, since the distance between the second connecting portion 332 and the top surface of the battery cell 2 is small, it is preferred to set an insulating layer 35 on the bottom surface of the second connecting portion 332 facing the battery cell 2. The insulating layer 35 can insulate and separate the adapter plate 33 and the battery cell 2, reduce the risk of short circuit caused by contact between the adapter plate 33 and the battery cell 2, and improve the safety of the battery. At the same time, this insulating layer 35 is preferably also accommodated in the storage space 313, so that the insulating layer 35 does not occupy the space of the battery cell 2, thereby improving the space utilization inside the battery, and further improving the battery power and energy density.

[0049] The top cover 3 of this solution is difficult to weld the adapter 33 pre-welded with the tab 21 to the pole 32 from bottom to top. Figure 4 、 Figure 7 and Figure 8 The pole 32 is provided with a through welding hole 321, and the second connecting portion 332 on the adapter 33 is provided with a protruding portion 333 protruding upward. This protruding portion 333 is inserted upward into the welding hole 321. At this time, the protruding portion 333 and the pole 32 can be welded together at the edge of the welding hole 321 from top to bottom, thereby achieving the purpose of welding the adapter 33 and the pole 32 to each other. In other words, by providing the welding hole 321 on the pole 32 and the protruding portion 333 on the adapter 33, even if the distance between the top cover 3 and the battery cell 2 is small, the adapter 33 and the pole 32 can be welded to each other.

[0050] See also Figure 4 、 Figure 7 and Figure 8 When the pole 32 is a negative pole, the pole 32 of this embodiment includes a pole body 322 and a base 323 that are separately connected, wherein the pole body 322 is preferably an aluminum part, the base 323 is preferably a copper part, and the corresponding adapter 33 is preferably also a copper part. The adapter 33, which is also a copper part, can be reliably welded to the base 323. The above-mentioned welding hole 321 is provided on the base 323. The pole body 322 is connected to the top of the base 323 and exposes the welding hole 321. The pole body 322 is preferably an annular structure annularly arranged around the outer periphery of the welding hole 321. The pole body 322 and the base 323 are both insulated and connected to the convex structure 312 through the above-mentioned insulating member 34. At this time, the raised portion 333 on the adapter 33 is preferably required to be lower than the welding hole 321 to ensure that the adapter 33 and the pole 32 can be reliably welded.

[0051] See also Figure 5 When the pole 32 is a positive pole, the pole body 322 and the base 323 are equivalent to an integrated structural design. The entire pole 32 is preferably an aluminum part, and the corresponding adapter 33 is also preferably an aluminum part. The adapter 33, which is also an aluminum part, can be reliably welded to the pole 32. At this time, the protrusion 333 on the adapter 33 can be flush with the welding hole 321 or protrude relative to the welding hole 321, and the adapter 33 and the pole 32 can be reliably welded.

[0052] See also Figure 4 or Figure 5The above-mentioned insulating member 34 is provided on the outer periphery of the pole 32. The insulating member 34 is used to insulate and separate the pole 32 from the first shell wall 31. The outer edge of the base 323 protrudes relative to the pole body 322 and abuts against the insulating member 34. That is, the outer dimensions of the base 323 are larger than the outer dimensions of the pole body 322, thereby preventing the pole 32 from detaching upward and improving the reliability of the insulation connection between the pole 32 and the first shell wall 31.

[0053] Please also refer to Figures 3 to 8 The top cover 3 also includes a plastic part 36 arranged at the bottom of the first shell wall 31. The plastic part 36 is mainly used to separate the first shell wall 31 and the battery cell 2, reducing the risk of short circuit caused by contact between the first shell wall 31 and the top surface of the battery cell 2. Specifically, the plastic part 36 is provided with an upwardly protruding bump structure 361 at a position corresponding to the receiving space 313. This bump structure 361 is also accommodated in the receiving space 313. The bottom of the bump structure 361 is provided with a concave avoidance groove 362, and the top of the bump structure 361 is provided with a downwardly connected The avoidance hole 363 leads to the avoidance groove 362. In fact, the above-mentioned adapter plate 33 is accommodated in this avoidance groove 362, so that the protrusion structure 361 can separate the first shell wall 31 and the adapter plate 33, thereby avoiding the contact between the pole ear 21 connected to the adapter plate 33 and the bottom surface of the first shell wall 31, thereby reducing the risk of battery short circuit and improving the safety of the battery. The avoidance hole 363 is used to avoid the pole 32 or the adapter plate 33, so that the pole 32 and the adapter plate 33 can be welded to each other across the plastic part 36.

[0054] Please also refer to Figures 1 to 5 The top cover 3 of this embodiment preferably includes two poles 32 and two adapter plates 33. Correspondingly, the first shell wall 31 is provided with two mounting holes 311 on the convex structure 312. Figure 4 As shown, one of the poles 32 is inserted into one of the mounting holes 311, as shown in FIG. Figure 5 As shown, another pole 32 is inserted into another mounting hole 311, one adapter plate 33 is connected to the positive pole ear on the battery cell 2 and is connected to one of the poles 32, and the other adapter plate 33 is connected to the negative pole ear on the battery cell 2 and is connected to the other pole 32. In other words, one of the two poles 32 is a positive pole and the other is a negative pole. In addition, the storage space 313 accommodates two adapter plates 33 at the same time to ensure that the two adapter plates 33 do not occupy the height space under the top cover 3, thereby improving the space utilization inside the battery, and then improving the battery's power and energy density. In other embodiments, only one pole 32 can be designed on the top cover 3, and correspondingly only one adapter plate 33 is provided. Under this structure, the shell 1 or the top cover 3 is usually designed to have another polarity opposite to the polarity of the pole 32.

[0055] See also Figure 7The battery further includes an explosion-proof valve 6 provided on the first shell wall 31, so that the battery can release pressure outward through the explosion-proof valve 6 when thermal runaway occurs, thereby reducing the risk of battery explosion and improving battery safety. In this embodiment, the length direction of the explosion-proof valve 6 points to the second direction (i.e. Figure 7 In the Y direction), since the adapter plate 33 occupies more space in the first direction, in order to ensure that the explosion-proof valve 6 has sufficient length to have a sufficient pressure relief area, the second direction of this solution is designed to be non-collinear with the above-mentioned first direction. Preferably, the first direction and the second direction are designed to be perpendicular to each other.

[0056] Please refer again Figure 7 The convex structure 312 of this embodiment specifically includes a first convex structure 3121 and a second convex structure 3122. The length of the first convex structure 3121 extends along the first direction (i.e., the X direction), and the second convex structure 3122 is arranged in the middle area of ​​the first convex structure 3121. The length of the second convex structure 3122 extends along the second direction (i.e., the Y direction). The first convex structure 3121 and the second convex structure 3122 together form a cross convex structure. The above-mentioned pole 32 is actually arranged at the end position of the first convex structure 3121, and the above-mentioned explosion-proof valve 6 is arranged at the second convex structure 3122. Through this design, while being able to accommodate the explosion-proof valve 6 extending along the Y direction, the width occupied by the first convex structure 3121 in the Y direction can be reduced, thereby reserving more space for the margin of the top cover 3 and improving the reliability of the top cover 3 sealing the housing 1. At the same time, the cross-shaped convex structure 312 has the advantage of greater structural strength and better resistance to deformation when subjected to external force.

[0057] Example 2

[0058] Please also refer to Figures 9 to 11 This embodiment provides a welding tool that can be used before welding the battery cell 2 and the pole 32 in the top cover 3. The welding tool mainly includes a support plate 4 and two bases 5. The following is a method for welding the pole 32 of the battery cell 2 and the top cover 3:

[0059] Step 1: Pre-weld the tabs 21 of each flat-lying battery cell 2 to the top surface of the first connecting portion 331 of the adapter 33, and pre-connect the pole 32 to the first shell wall 31;

[0060] Step 2: Place each battery cell 2 downward so that each battery cell 2 is in the following position: Figure 9 or Figure 10In the vertical posture shown, the adapter plate 33 is located on the top of each battery cell 2. Then, two bases 5 are arranged on opposite sides of all the battery cells 2. The two bases 5 jointly limit the lateral positions of the multiple battery cells 2. Then, the support plate 4 is extended between the top surface of the battery cell 2 and the second connection portion 332 of the adapter plate 33. At this time, the support plate 4 can support the second connection portion 332 of the adapter plate 33 to prevent the adapter plate 33 from falling relative to the pole 32 during subsequent welding with the pole 32.

[0061] Step 3: Then place the first shell wall 31 with the pole 32 on top of the adapter 33, and make the protrusion 333 on the adapter 33 and the welding hole 321 on the pole 32 match and plug in;

[0062] Step 4: Welding is performed from top to bottom at the edge of the welding hole 321 of the pole 32 to complete the welding operation of the adapter 33 and the pole 32. After welding is completed, the support plate 4 and the two bases 5 are removed.

[0063] It is additionally noted here that if the battery uses a plastic part 36, a penetrating guide groove 364 needs to be provided on the bottom surface of the plastic part 36. This guide groove 364 is used to avoid the insertion of the above-mentioned support plate 4, and this guide groove 364 can also guide the support plate 4 to be accurately inserted between the top surface of the battery cell 2 and the second connecting portion 332 of the adapter 33, thereby improving the reliability of welding the second connecting portion 332 and the pole 32.

[0064] This welding tool efficiently welds the adapter plate 33 to the terminal 32 from top to bottom, improving the reliability of the weld between the adapter plate 33 and the terminal 32, thereby improving battery production efficiency and quality. Furthermore, the outer surface of the support plate 4 is preferably covered with an insulating PET or PP film. This design not only prevents metal shavings from being dropped from the support plate 4 due to friction with the adapter plate 33, but also prevents short circuits caused by contact between the support plate 4 and the top surface of the battery cell 2.

[0065] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A battery, characterized in that: It comprises a housing (10), a battery cell (2), a pole (32) and a switching piece (33), wherein the housing (10) comprises a first housing wall (31), and the battery cell (2) is accommodated in the housing (10); The first shell wall (31) is provided with a convex structure (312) protruding in a direction away from the battery cell (2); a concave receiving space (313) is provided on a side of the first shell wall (31) facing the battery cell (2) at a position corresponding to the convex structure (312); a mounting hole (311) communicating with the receiving space (313) is provided on the convex structure (312); the pole (32) is arranged in the mounting hole (311) and is insulated from the convex structure (312); the adapter (33) is used to connect to the tab led out from the battery cell and to connect to the pole (32); and the receiving space (313) is used to accommodate the entire adapter (33).

2. The battery according to claim 1, wherein The adapter plate (33) comprises a first connecting portion (331) and a second connecting portion (332) connected to each other, wherein the first connecting portion (331) is used to connect to a tab led out from the battery cell, and the second connecting portion (332) is used to connect to the pole (32). When the adapter plate (33) is connected to the pole (32), the first connecting portion (331) and the second connecting portion (332) are arranged adjacent to each other along a first direction of the first shell wall (31).

3. The battery according to claim 2, wherein The top surface of the first connecting portion (331) is used for connection to the tab, and a gap (314) is provided between a surface of the first connecting portion (331) facing away from the battery cell (2) and the bottom surface of the storage space (313), wherein the gap (314) is used for accommodating the tab connected to the top surface of the first connecting portion (331).

4. The battery according to claim 2, wherein The pole (32) is provided with a through welding hole (321), and the second connecting portion (332) is provided with a protruding portion (333) protruding upwards. The protruding portion (333) is inserted into the welding hole (321) and is used for welding with the pole (32).

5. The battery according to claim 4, wherein The pole (32) is a negative pole, comprising a pole body (322) and a base (323) connected to each other, the base (323) being provided with the welding hole (321), the pole body (322) being connected to the top of the base (323) and exposing the welding hole (321), and the pole body (322) and the base (323) being insulated and connected to the convex structure (312).

6. The battery according to claim 4, wherein The pole (32) is a positive pole, comprising a pole body (322) and a base (323) of an integrated structure, the base (323) being provided with the welding hole (321), the pole body (322) being connected to the top of the base (323) and exposing the welding hole (321), the pole body (322) and the base (323) being insulated from and connected to the convex structure (312), and the raised portion (333) being connected to the pole body (322) or the base (323).

7. The battery according to any one of claims 5 or 6, characterized in that An insulating member (34) is provided on the outer periphery of the pole (32), and the insulating member (34) is used to insulate and separate the pole (32) and the first shell wall (31). The outer edge of the base (323) protrudes relative to the pole body (322) and abuts against the insulating member (34).

8. The battery according to any one of claims 1 to 6, characterized in that An insulating layer (35) is provided on a side of the adapter plate (33) facing the battery core (2), and the insulating layer (35) is also accommodated in the storage space (313).

9. The battery according to any one of claims 1 to 6, characterized in that The battery further comprises a plastic part (36) arranged on the side of the first shell wall (31) facing the battery cell (2), the plastic part (36) being provided with a convex block structure (361) protruding upward and accommodated in the accommodation space (313) at a position corresponding to the accommodation space (313), the convex block structure (361) being provided with a concave avoidance groove (362) on a side facing the battery cell (2), the top of the convex block structure (361) being provided with an avoidance hole (363) downwardly connected to the avoidance groove (362), the avoidance groove (362) also being used to accommodate the adapter plate (33), and the avoidance hole (363) being used to avoid mutual welding of the pole (32) and the adapter plate (33).

10. The battery according to any one of claims 1 to 6, characterized in that The housing (10) comprises a shell (1) and a top cover (3); the battery core (2) is accommodated in the shell (1); the top cover (3) seals the notch of the shell (1); and the top cover (3) comprises the first shell wall (31).

11. The battery according to claim 10, wherein The top cover includes two poles (32) and two adapter plates (33); the convex structure (312) is provided with two mounting holes (311); one pole (32) is plugged into one mounting hole (311); the other pole (32) is plugged into the other mounting hole (311); one adapter plate (33) is used to connect to the positive electrode ear and to one pole (32); the other adapter plate (33) is used to connect to the negative electrode ear and to the other pole (32); and the storage space (313) is used to simultaneously accommodate the two adapter plates (33).

12. The battery according to claim 2, wherein The battery further comprises an explosion-proof valve (6) arranged on the first shell wall (31), wherein the length direction of the explosion-proof valve (6) points to a second direction, and the second direction is not collinear with the first direction.

13. The battery according to claim 12, wherein The convex structure (312) comprises a first convex structure (3121) and a second convex structure (3122), wherein the length of the first convex structure (3121) extends along the first direction, the second convex structure (3122) is arranged in a middle area of ​​the first convex structure (3121), and the length of the second convex structure (3122) extends along the second direction, the pole (32) is arranged at the end of the first convex structure (3121), and the explosion-proof valve (6) is arranged at the second convex structure (3122).

14. A welding tool, characterized in that: Before being used for welding the battery cell (2) and the pole (32) of the battery according to any one of claims 1 to 13, the welding tool comprises a support plate (4) and two bases (5), wherein the two bases (5) are arranged on opposite sides of the battery cell (2) to jointly limit the position of the battery cell (2), and the support plate (4) is used to extend between the top surface of the battery cell (2) and the adapter plate (33), so that the support plate (4) can be used to support the adapter plate (33).

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