Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, it includes: battery cover plate structure, battery cover plate structure includes welding ring, pole and insulation subassembly, welding ring includes bottom plate and spacing body, spacing body is connected to bottom plate, wherein, part of bottom plate can bend towards pole, and with spacing body encloses installation space, and the insulation subassembly is connected to the bottom plate. The pole is clamped and fixed through the bottom plate; at least part of the insulating component is filled between the welding ring and the pole; the current collecting plate is electrically connected with the pole; the battery cell is electrically connected with the collector plate; the battery cover plate structure is arranged on the shell, and the collector plate and the battery cell are arranged in the shell. While the thickness of the pole is reduced, the mounting stability of the pole is improved, the internal space utilization rate of the battery is improved, the energy density of the battery is improved, the cost of structural parts is reduced, in addition, the battery has the advantages of being wide in application range, flexible to dismount and mount, convenient to assemble and process and the like, and a new thought is provided for producing the small-pole low-cost battery.

Description

Technical Field

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

[0002] During the manufacturing and assembly of batteries, the design of the pole is crucial to the performance and safety of the entire battery. Traditional battery poles are mostly connected to the cover shell to ensure stable connection with the busbar and the pole lug.

[0003] Theoretically, in order to match the actual production and processing welding depth, the pole thickness can usually reach about 4mm. However, in the actual battery cover structure, in order to ensure the stability of the pole during use, it is necessary to provide sufficient mechanical strength to press the plastic and the sealing ring. This leads to the actual thickness of the pole needing to reach about 7mm. This adaptive adjustment has greatly increased the use of pole materials, which not only increases production costs and manufacturing complexity, but also increases the overall weight of the battery, thereby indirectly limiting the scope of application and production efficiency of the battery.

[0004] At the same time, excessive thickness of the electrode will also affect the energy density of the battery. Since the electrode occupies the space inside the battery, the amount of active material (such as lithium) that the battery cell can accommodate is reduced, thereby reducing the theoretical energy density of the battery and its actual endurance in use. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the thickness of the pole is difficult to reduce, resulting in increased costs and limited battery performance, and to provide a battery and an electrical device.

[0006] To solve the above technical problems, the utility model provides a battery, which includes: a battery cover structure, the battery cover structure includes a welding ring, a pole and an insulating component, the welding ring includes a base plate and a limiter, the limiter is connected to the base plate, wherein part of the base plate can be bent toward the pole, and together with the limiter, an installation space is enclosed, and the pole is clamped and fixed in the installation space by the base plate; at least part of the insulating component is filled between the welding ring and the pole; a current collecting plate, which is electrically connected to the pole; a battery cell, which is electrically connected to the current collecting plate; a shell, the battery cover structure is arranged on the shell, and the current collecting plate and the battery cell are both arranged inside the shell.

[0007] In one embodiment of the present invention, a projection area of ​​the current collecting plate in the first direction is larger than a projection area of ​​the battery cover structure in the first direction.

[0008] In one embodiment of the utility model, the pole includes a main body and a mounting portion, the main body is connected to the mounting portion, and the diameter of the mounting portion is larger than the diameter of the main body, wherein the welding ring is passed through the main body, and the mounting portion is clamped in the mounting space.

[0009] In one embodiment of the utility model, the insulating assembly includes a fixing member, and the fixing member includes a first fixing portion and a second fixing portion, the first fixing portion covers the outer surface of the limiter, and the second fixing portion is clamped between the pole and the welding ring.

[0010] In one embodiment of the present invention, the insulating assembly includes a seal, and the seal is arranged between the bottom plate and the pole, and the bottom plate can be bent and squeeze the seal.

[0011] In one embodiment of the utility model, at least one first anti-rotation groove is provided on the limiting body; the insulating component includes at least one first anti-rotation portion, and at least one first anti-rotation portion is inserted in at least one first anti-rotation groove.

[0012] In one embodiment of the utility model, at least one second anti-rotation groove is provided on the pole; the insulating component includes at least one second anti-rotation portion, and at least one second anti-rotation portion is inserted in at least one second anti-rotation groove.

[0013] In one embodiment of the present invention, it further comprises a bottom cover structure, wherein the bottom cover structure and the battery cover plate structure are respectively arranged at two ends of the shell in the height direction.

[0014] In one embodiment of the present invention, the bottom cover structure includes a main body and at least one reinforcement portion, at least one reinforcement portion is disposed on the main body and protrudes from the main body, and a gas channel is surrounded by the reinforcement portion and the battery cell.

[0015] The utility model also provides an electrical device, which comprises at least one of the above-mentioned batteries.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] The battery and electrical equipment described in the utility model clamp and fix the pole through the insulating component and the bent welding ring, and then connect the battery cover structure as a whole to the rest of the battery structure, thereby reducing the thickness of the pole and improving the installation stability of the pole. Compared with the conventional battery structure at this stage, this application improves the internal space utilization of the battery, increases the energy density of the battery, and reduces the cost of structural parts. In addition, it also has the advantages of wide application range, flexible disassembly and installation, and easy assembly and processing, providing a new idea for the production of small pole low-cost batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the battery cover structure in the preferred battery of the utility model;

[0020] Figure 2 yes Figure 1 A schematic cross-sectional view of the battery cover structure at AA;

[0021] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the welding ring in the battery cover structure shown;

[0022] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the fixing member in the battery cover structure shown;

[0023] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the pole in the battery cover structure shown;

[0024] Figure 6 yes Figure 1 Schematic diagram of the cell cover structure and current collecting plate structure of the battery shown;

[0025] Figure 7 yes Figure 6 The exploded structural diagram of the pool cover structure and the collecting plate structure shown;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of a battery cover structure of a battery in another embodiment of the utility model.

[0027] Explanation of the reference numerals in the specification: 100, welding ring; 110, bottom plate; 120, limiting body; 121, first stop portion; 122, second stop portion; 1221, first anti-rotation groove; 200, pole; 210, main body; 220, mounting portion; 221, second anti-rotation groove; 300, insulating component; 310, fixing member; 311, first fixing portion; 312, second fixing portion; 320, sealing member; 400, lower plastic; 410, pole stop portion; 420, pole tab stop portion; 500, collecting plate; 510, pole connection portion; 520, pole tab connection portion. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0029] Embodiment 1

[0030] See also Figures 1 to 5 As shown, this embodiment provides a battery, which includes: a battery cover structure, the battery cover structure includes a welding ring 100, a pole 200 and an insulating component 300, the welding ring 100 includes a base plate 110 and a limiter 120, the limiter 120 is connected to the base plate 110, wherein a portion of the base plate 110 can be bent toward the pole 200, and an installation space is enclosed with the limiter 120, and the pole 200 is clamped and fixed in the installation space by the base plate 110; at least a portion of the insulating component 300 is filled between the welding ring 100 and the pole 200; a current collecting plate 500, the current collecting plate 500 is electrically connected to the pole 200; a battery cell, the battery cell is electrically connected to the current collecting plate 500; a shell, the battery cover structure is arranged on the shell, and the current collecting plate 500 and the battery cell are both arranged inside the shell.

[0031] The battery in this embodiment clamps and fixes the pole 200 through the insulating component 300 and the bent welding ring 100, and then the battery cover structure is connected to the rest of the battery structure as a whole, thereby reducing the thickness of the pole 200 and improving the installation stability of the pole 200. Compared with the conventional battery structure at this stage, this application improves the internal space utilization of the battery, increases the energy density of the battery, and reduces the cost of structural parts. In addition, it also has the advantages of wide application range, flexible disassembly and installation, and easy assembly and processing, providing a new idea for the production of small pole low-cost batteries.

[0032] In this embodiment, the battery is preferably a cylindrical battery, and two openings, one large and one small, are respectively provided at both ends of the length direction of the shell. The battery cover assembly, the current collecting plate 500 and the battery cell are connected in sequence and enter the shell through the large opening until part of the battery cover structure passes through the shell through the small opening, and then the large opening is covered. Among them, the battery cover structure is used to connect with the shell to cover the small opening of the shell, and on the other hand, it is used to achieve electrical connection with the current collecting plate 500 through the pole 200 thereon; the current collecting plate 500 is used to connect the pole ear of the battery cell and the pole 200 of the battery, thereby achieving electrical conduction inside the battery. Further, the projection area of ​​the current collecting plate 500 in the first direction in this embodiment is greater than the projection area of ​​the battery cover structure in the first direction. Specifically, the first direction in this embodiment is the length direction of the battery shell. This structure is different from conventional batteries. It can not only ensure the connection stability of the battery cover assembly, but also realize the split setting between the pole 200, the shell and the current collecting plate 500, thereby achieving the purpose of reducing the thickness of the pole 200.

[0033] See also Figures 1 to 3 As shown, in this embodiment, the base plate 110 and the limiting body 120 in the welding ring 100 are fixedly connected and are actually an integrated arrangement, wherein the limiting body 120 includes a first stop portion 121 and a second stop portion 122, the second stop portion 122 is connected to the base plate 110 through the first stop portion 121, and the second stop portion 122 extends toward the installation space. Specifically, the second stop portion 122 in this embodiment is arranged parallel to the base plate 110. Furthermore, the welding ring 100 in the present embodiment is preferably a bendable metal ring. Before installation, part of the bottom plate 110 extends in the same direction as the first stop portion 121, thereby facilitating the pole 200 to pass into the interior thereof. When the pole 200 reaches the target position, part of the bottom plate 110 extending in the same direction as the first stop portion 121 can be bent toward the pole 200 based on rolling processing or the like until it is parallel to the second stop portion 122. This structural arrangement can stably clamp the pole 200 in the installation space.

[0034] See also Figures 1 to 4As shown, in this embodiment, the insulating component 300 includes a fixing member 310, and the fixing member 310 includes a first fixing portion 311 and a second fixing portion 312. The first fixing portion 311 covers the outer surface of the limiting body 120, and the second fixing portion 312 is clamped between the pole 200 and the welding ring 100. Specifically, part of the fixing member 310 in this embodiment tightly connects the pole 200 and the welding ring 100 by injection molding, and at the same time realizes insulation isolation between the two. After the other part of the fixing member 310 is injection molded, the welding ring 100 is tightly covered inside it, thereby improving the safety of battery use and also playing the role of dust and collision prevention for the welding ring 100. Further, the insulating component 300 in this embodiment includes a sealing member 320, which is arranged between the bottom plate 110 and the pole 200, and the bottom plate 110 can be bent and squeeze the sealing member 320. The sealing member 320 and the fixing member 310 in this embodiment are separately provided. Since it is difficult to precisely control the sealing degree of the fixing member 310 during the injection molding process, the sealing member 320 is provided at a position where the fixing member 310 is difficult to be injection molded, thereby maximizing the insulation degree between the welding ring 100 and the pole 200. Specifically, the sealing member 320 in this embodiment needs to be inserted to a predetermined position before the bottom plate 110 is bent, and then it can transmit the force it receives during the bending process of the bottom plate 110, so as to achieve a high degree of sealing and clamping and fixing of the pole 200.

[0035] Furthermore, at least one first anti-rotation groove 1221 is provided on the limiting body 120, and the insulating assembly 300 includes at least one first anti-rotation portion, and at least one first anti-rotation portion is inserted into at least one first anti-rotation groove 1221. In the present embodiment, there are four first anti-rotation grooves 1221 and four first anti-rotation portions corresponding to each other, wherein the four first anti-rotation grooves 1221 are provided at the edge of the limiting body 120 facing the installation space, and the four first anti-rotation grooves 1221 are evenly spaced, and any first anti-rotation groove 1221 extends from the edge of the limiting body 120 toward a direction away from the installation space, and accordingly, the shape of the first anti-rotation portion matches the shape of the first anti-rotation groove 1221, and it can be tightly connected to the corresponding first anti-rotation groove 1221. In the present embodiment, a limiting structure can be formed between the first anti-rotation portion and the first anti-rotation groove 1221 to prevent the welding ring 100 and the insulating assembly 300 from rotating relative to each other during installation or use.

[0036] See also Figures 1 to 5As shown, the pole 200 includes a main body 210 and a mounting portion 220, the main body 210 is connected to the mounting portion 220, and the diameter of the mounting portion 220 is greater than the diameter of the main body 210, wherein the main body 210 is penetrated by a welding ring 100, and the mounting portion 220 is clamped in the mounting space. In this embodiment, the main body 210 and the mounting portion 220 are fixedly connected. In order to reduce costs, the main body 210 and the mounting portion 220 are designed to be made of different materials in this embodiment. In other embodiments, the pole 200 can also be configured as an integrally formed single-material component. In this embodiment, the mounting portion 220 and the main body 210 are both configured as a circular structure with the same cross-section as the cylindrical shell, and the two are concentrically arranged, wherein the diameter of the mounting portion 220 is greater than the diameter of the main body 210. When the pole 200 enters the welding ring 100, the main body 210 will pass through the welding ring 100 to facilitate subsequent electrical connection. The mounting portion 220 abuts against the welding ring 100, thereby restricting the pole 200 in the welding ring 100. When the bottom plate 110 is bent, it can tightly clamp the mounting portion 220 inside the installation space, thereby realizing the installation and fixing process of the pole 200.

[0037] Furthermore, at least one second anti-rotation groove 221 is provided on the pole 200; the insulating assembly 300 includes at least one second anti-rotation portion, and at least one second anti-rotation portion is inserted into at least one second anti-rotation groove 221. In this embodiment, there are four second anti-rotation grooves 221 and four second anti-rotation portions corresponding to each other, wherein the four second anti-rotation grooves 221 are provided at the edge of the mounting portion 220, and the four second anti-rotation grooves 221 are evenly spaced, and any second anti-rotation groove 221 extends from the edge of the limiting body 120 toward the center thereof, and accordingly, the shape of the second anti-rotation portion matches the shape of the second anti-rotation groove 221, and it can be tightly connected to the corresponding second anti-rotation groove 221. In this embodiment, a limiting structure can be formed between the second stop portion and the second stop groove 221 to prevent the pole 200 and the insulating component 300 from relative rotation during installation or use. Based on this structural setting, the welding ring 100, the pole 200 and the insulating component 300 have a relatively fixed position relationship, thereby enabling the battery cover structure to remain stable during use.

[0038] See also Figure 6 and Figure 7As shown, in this embodiment, the collector plate 500 is arranged between the battery cell and the battery cover structure, and is provided with a pole lug connection portion 520 and a pole column connection portion 510, wherein the pole column connection portion 510 is convexly arranged toward the pole column 200, and the pole lug connection portion 520 is concavely arranged toward the battery cell pole lug. Furthermore, the pole column connection portion 510 is penetrated into the welding ring 100 and abuts against the pole column 200, thereby realizing the electrical connection between the collector plate 500 and the pole column 200. Based on this structural setting, the pole column connection portion 510 can make up for the shortened thickness of the pole column 200, thereby achieving the effect of reducing costs while achieving electrical conduction between the two. The pole lug connection portion 520 is welded to the pole lug of the battery, thereby completing the electrical connection between the battery cover structure and the battery cell.

[0039] In this embodiment, the current collecting plate 500 is set as a guide metal plate with the same diameter as the cross-section of the shell, the pole connecting portion 510 is set at the center of the current collecting plate 500, and four pole lug connecting portions 520 are evenly spaced around the pole connecting portion 510, so that the current collecting plate 500 can connect four pole lugs at the same time. Furthermore, in addition to serving as an electrical connection, the larger diameter of the current collecting plate 500 can also limit the battery cover structure connected to it, so as to cooperate with the shell to position and connect the battery cover structure. In other embodiments, the current collecting plate 500 can be set to other shapes according to actual needs, and other numbers or other positions of pole lug connecting portions 520 can also be provided thereon, and the utility model does not make specific restrictions on this.

[0040] The present embodiment also includes a lower plastic 400, which is filled between the pole connection part 510, the current collecting disk 500 and the welding ring 100. Specifically, the lower plastic 400 includes a pole lug stopper 420 and a pole stopper 410, wherein the pole stopper 410 covers the surface of the current collecting disk 500, and the pole lug stopper 420 is connected to the center of the pole lug stopper 420, which is located inside the welding ring 100 and inserted between the pole connection part 510 and the welding ring 100. In the present embodiment, the pole lug stopper 420 is used to achieve insulation isolation between the pole lug welding part and the welding ring 100, and the pole connection part 510 is used to achieve insulation isolation between the pole connection part 510 and the welding ring 100. Based on this, the lower plastic 400 realizes a comprehensive insulation setting between the current collecting disk 500 and the welding ring 100.

[0041] The battery in this embodiment also includes a bottom cover structure, and the bottom cover structure and the battery cover plate structure are respectively arranged at both ends of the shell height direction. Specifically, the bottom cover structure is used to cover the large opening of the shell. Further, the bottom cover structure includes a body and at least one reinforcement part, at least one reinforcement part is arranged on the body, and protrudes from the body, and the reinforcement part and the battery core are surrounded by a gas channel. The reinforcement part is used to improve the impact resistance of the bottom cover, thereby improving the overall safety of the battery, and the gas channel is used to guide the gas generated during the battery charging and discharging operation. Specifically, in this embodiment, a liquid injection port is provided at the center of the bottom cover, and an explosion-proof plate is provided on the liquid injection port. The gas guide channel extends to the liquid injection port, so that whenever the gas pressure inside the battery is too large, the guide channel can guide the above-mentioned gas to the liquid injection port where the strength is the weakest, and then the gas breaks through the explosion-proof plate and discharges the shell to prevent the battery from exploding. Furthermore, in this embodiment, the battery is injected with liquid through the liquid injection port, and then sealed by welding a sealing nail. After the sealing is completed, the explosion-proof plate is connected and the blue film is coated, and the battery assembly process is completed.

[0042] Embodiment 2

[0043] This embodiment provides another battery, whose main structure and operating principle are the same as those of the first embodiment, and no further details are given here. In this embodiment, only the shape of the battery cover structure is different from that of the first embodiment, specifically: Figure 8 As shown, the battery cover structure in this embodiment is set to a runway shape. In other embodiments, the battery cover structure can also be designed to be a square, a square with rounded corners or other special shapes according to actual use requirements. The utility model does not make specific restrictions on this.

[0044] Embodiment 3

[0045] The present embodiment provides an electrical device, which includes the battery in the embodiment. The electrical device in the present embodiment can be a car, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The car can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended-range car, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiments of the present invention do not impose any special restrictions on the above-mentioned electrical devices.

[0046] In summary, the battery and electrical equipment of the utility model clamp and fix the pole 200 through the insulating component 300 and the bent welding ring 100, and then connect the battery cover structure as a whole to the rest of the battery structure, thereby reducing the thickness of the pole 200 while improving the installation stability of the pole 200. Compared with the conventional battery structure at this stage, this application improves the internal space utilization of the battery, increases the energy density of the battery, and reduces the cost of structural parts. In addition, it also has the advantages of a wide range of applications, flexible disassembly and installation, and easy assembly and processing, providing a new idea for the production of low-cost batteries with small poles 200.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A battery, characterized in that: include: A battery cover plate structure, the battery cover plate structure comprising a welding ring (100), a pole (200) and an insulating component (300), the welding ring (100) comprising a bottom plate (110) and a stopper (120), the stopper (120) being connected to the bottom plate (110), wherein a portion of the bottom plate (110) can be bent toward the pole (200) and an installation space is enclosed with the stopper (120), and the pole (200) is clamped and fixed in the installation space by the bottom plate (110); at least a portion of the insulating component (300) is filled between the welding ring (100) and the pole (200); A current collecting plate (500), the current collecting plate (500) being electrically connected to the pole (200); A battery cell, the battery cell being electrically connected to the current collecting plate (500); The battery cover structure is arranged on the shell, and the current collecting plate and the battery core are arranged inside the shell.

2. The battery according to claim 1, characterized in that: The projection area of ​​the current collecting plate (500) in the first direction is larger than the projection area of ​​the battery cover structure in the first direction.

3. The battery according to claim 1, characterized in that: The pole (200) comprises a main body (210) and a mounting portion (220), wherein the main body (210) is connected to the mounting portion (220), and the diameter of the mounting portion (220) is greater than the diameter of the main body (210), wherein the welding ring is passed through the main body (210), and the mounting portion (220) is clamped in the mounting space.

4. The battery according to claim 1, characterized in that: The insulating component (300) comprises a fixing member (310), wherein the fixing member comprises a first fixing portion (311) and a second fixing portion (312), wherein the first fixing portion (311) covers the outer surface of the limiting body (120), and the second fixing portion (312) is clamped between the pole (200) and the welding ring (100).

5. The battery according to claim 1, characterized in that: The insulating component (300) comprises a sealing member (320), wherein the sealing member (320) is arranged between the bottom plate (110) and the pole (200), and the bottom plate (110) can be bent and squeeze the sealing member (320).

6. The battery according to claim 1, characterized in that: At least one first anti-rotation groove (1221) is provided on the limiting body (120); the insulating component (300) comprises at least one first anti-rotation portion, and at least one first anti-rotation portion is inserted into at least one first anti-rotation groove (1221).

7. The battery according to claim 1, characterized in that: At least one second anti-rotation groove (221) is provided on the pole (200); the insulating component (300) comprises at least one second anti-rotation portion, and at least one second anti-rotation portion is inserted into at least one second anti-rotation groove (221).

8. The battery according to claim 1, characterized in that: It also includes a bottom cover structure, and the bottom cover structure and the battery cover plate structure are respectively arranged at two ends of the shell in the height direction.

9. The battery according to claim 8, characterized in that: The bottom cover structure includes a main body and at least one reinforcement part. The at least one reinforcement part is arranged on the main body and protrudes from the main body. The reinforcement part and the battery core surround a gas channel.

10. An electrical equipment, characterized in that: Comprising at least one battery according to any one of claims 1 to 9.

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