Battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery and a power utilization device, the battery comprises a shell, a first cover plate and a battery cell, one end of the shell is provided with a first opening, the first cover plate is arranged at the first opening, an accommodating space is formed between the first cover plate and the shell, and the battery cell is arranged in the accommodating space. The battery cell is arranged in the accommodating space, a weak part is arranged on the first cover plate, and a traction piece is arranged on the weak part or on the edge, close to the weak part, of the first cover plate; the weak part is arranged on the first cover plate, and the traction piece is arranged on the weak part or on the edge, close to the weak part, of the first cover plate, so that when liquid is supplemented to the battery, the weak part is broken by utilizing the traction piece to form the liquid injection port, electrolyte can be injected into the battery through the liquid injection port, the liquid supplementing to the battery is effectively realized, the cycle performance of the battery is improved, and the service life of the battery is prolonged. The service life of the battery is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to batteries and electrical devices. Background Art

[0002] As a new type of secondary battery, lithium-ion battery has the advantages of high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and green environmental protection. It has broad application prospects in portable appliances, power tools, large-scale energy storage, electric transportation power supply, etc.

[0003] With the rapid development of the new energy field, the application field of batteries is becoming more and more extensive, so higher requirements are also put forward for the performance and life of batteries. At present, after multiple charge and discharge, the cycle performance of the battery will decline significantly, and the life of the battery will gradually shorten. This is mainly because the electrolyte will be continuously consumed and decomposed during the continuous charge and discharge cycle of the battery. In the prior art, the battery cannot be refilled after the liquid is injected and sealed. Therefore, when the electrolyte is consumed to a certain extent, the ion transmission inside the battery will be hindered, which will lead to a decrease in the cycle performance of the battery and a shortened life. Utility Model Content

[0004] The purpose of the utility model is to provide a battery and an electrical device to address the deficiencies in the prior art, thereby solving the technical problem in the prior art that the electrolyte is consumed and decomposed during continuous charge and discharge cycles, and the battery cannot be replenished after being filled and sealed, resulting in ion transmission being blocked when the electrolyte is consumed to a certain extent, thereby affecting battery performance and life.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a battery, comprising a shell, a first cover plate and a battery cell, wherein a first opening is provided at one end of the shell, the first cover plate is arranged at the first opening, an accommodating space is formed between the first cover plate and the shell, the battery cell is arranged in the accommodating space, a weak portion is provided on the first cover plate, and a pulling piece is provided on the weak portion or on the edge of the first cover plate close to the weak portion.

[0007] Preferably, the weak portion divides the first cover plate into a connecting portion and a separating portion, the connecting portion is connected to the inner wall of the shell, the separating portion is located in the middle of the connecting portion, and the pulling member is arranged on the weak portion or on the separating portion near the edge of the weak portion.

[0008] Preferably, a notch groove is formed on the first cover plate corresponding to the weak portion, and the area surrounded by the notch groove is the separation portion.

[0009] Preferably, when the pulling member ruptures the weak portion to form a liquid injection port and completes liquid injection, the first opening of the shell is provided with a second cover plate, and the second cover plate is arranged on a side of the first cover plate away from the battery cell.

[0010] Preferably, the inner side wall of the housing is provided with a first convex portion, and the first convex portion abuts against the lower surface of the first cover plate;

[0011] The first protrusion protrudes from the inner side wall of the shell into the accommodating space; or the side wall of the shell protrudes toward the accommodating space at a position close to the first opening.

[0012] Preferably, the inner side wall of the housing is provided with a second convex portion, and the second convex portion abuts against the lower surface or the upper surface of the second cover plate;

[0013] The second protrusion protrudes from the inner wall of the shell into the accommodating space; or, the edge of the shell located at the first opening is bent toward the accommodating space; or, the side wall of the shell protrudes toward the accommodating space near the first opening.

[0014] Preferably, the width of the second convex portion is less than or equal to the width of the first convex portion.

[0015] Preferably, an insulating member is provided between the first protrusion and the battery core.

[0016] Preferably, the battery further comprises an insulating seal, which is arranged between the first cover plate and the inner side wall of the shell; the insulating seal has a sealing ring groove, and the edge of the first cover plate is arranged in the sealing ring groove.

[0017] In a second aspect, the utility model provides an electrical device, comprising the battery of the above embodiment.

[0018] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0019] The battery of the utility model is provided with a weak portion on the first cover plate, and a pulling piece is provided on the weak portion or on the edge of the first cover plate near the weak portion. When the battery is replenished with fluid, the pulling piece is used to rupture the weak portion to form a liquid injection port, and the electrolyte can be injected into the battery through the liquid injection port, thereby effectively replenishing the battery, thereby improving the cycle performance of the battery and extending the service life of the battery.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is one of the structural schematic diagrams of the battery after liquid replenishment of the utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Figure 3 This is the second structural schematic diagram of the battery after liquid replenishment of the utility model.

[0025] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0026] Figure 5 This is the third structural schematic diagram of the battery after liquid replenishment of the utility model.

[0027] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at point C in the middle.

[0028] Figure 7 This is the fourth structural schematic diagram of the battery after liquid replenishment of the utility model.

[0029] Figure 8 This is the fifth structural schematic diagram of the battery after liquid replenishment of the utility model.

[0030] Fig. 9 This is one of the structural schematic diagrams of the battery of the utility model before liquid replenishment.

[0031] Fig.10 This is the second structural schematic diagram of the battery of the utility model before liquid replenishment.

[0032] Fig.11 This is the third structural schematic diagram of the battery before liquid replenishment of the utility model.

[0033] Fig.12 This is one of the structural schematic diagrams of the first cover plate of the utility model.

[0034] Fig.13 This is the second structural schematic diagram of the first cover plate of the utility model.

[0035] The reference numerals are described as follows:

[0036] 100. Battery;

[0037] 10. Shell; 11. First opening; 12. Side wall; 13. Bottom wall; 131. Through hole; 132. Pole; 14. Accommodation space;

[0038] 20. first cover plate; 21. weak part; 22. connecting part; 23. separating part; 24. pulling member; 25. notched groove; 26. liquid injection port;

[0039] 30. Second cover plate;

[0040] 40. battery cell; 41. main body; 42. first pole ear; 43. second pole ear;

[0041] 50. The first convex part;

[0042] 60. The second convex part;

[0043] 70. Insulation parts;

[0044] 80. Insulating seal; 81. Sealing ring groove;

[0045] 90. Sealant layer;

[0046] a. Width of the first convex portion; b. Width of the second convex portion. DETAILED DESCRIPTION

[0047] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0048] Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0049] In the utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0050] The following will be combined with the attached Figures 1 to 13 The technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] The power-consuming device of the embodiment of the utility model includes a battery 100. The power-consuming device may 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 may be a fuel car, a gas car, or a new energy car, and the new energy car may be a pure electric car, a hybrid car, or an extended-range car, and the like; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, and the like; 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, and the like; 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, and the like. The embodiment of the present application does not impose any special restrictions on the above-mentioned power-consuming devices.

[0052] See also Figures 1 to 13 The battery 100 of the embodiment of the utility model includes a shell 10, a first cover plate 20 and a battery cell 40, one end of the shell 10 is provided with a first opening 11, the first cover plate 20 is arranged at the first opening 11, an accommodating space 14 is formed between the first cover plate 20 and the shell 10, the battery cell 40 is arranged in the accommodating space 14, a weak portion 21 is provided on the first cover plate 20, and a pulling member 24 is provided on the weak portion 21 or on the edge of the first cover plate 20 close to the weak portion 21.

[0053] Compared with the prior art, the battery 100 of the embodiment of the utility model is provided with a weak portion 21 on the first cover plate 20, and a pulling member 24 is provided on the weak portion 21 or on the edge of the first cover plate 20 near the weak portion 21. When the battery 100 is replenished with fluid, the pulling member 24 is used to rupture the weak portion 21 to form a liquid injection port 26, and the electrolyte can be injected into the battery 100 through the liquid injection port 26, thereby effectively replenishing the battery 100, thereby improving the cycle performance of the battery 100 and extending the service life of the battery 100.

[0054] See also Figures 1 to 8In some embodiments, when the pulling member 24 ruptures the weak portion 21 to form the liquid injection port 26 and completes the liquid injection, the first opening 11 of the housing 10 is provided with a second cover plate 30, and the second cover plate 30 is provided on a side of the first cover plate 20 away from the battery cell 40. Through the provision of the second cover plate 30, the second cover plate 30 is provided at the first opening 11 of the housing 10, and is used to seal the liquid injection port 26 formed when the battery 100 is replenished, thereby achieving sealing of the battery 100 after the liquid is replenished.

[0055] It is understandable that the second cover plate 30 may be plate-shaped, or may have the same structure as the first cover plate 20 , that is, the second cover plate 30 is also provided with a weak portion 21 and a pulling member 24 so that the battery 100 can be refilled later.

[0056] Of course, the second cover plate 30 can also be detachably arranged at the first opening 11 of the housing 10, for example, the second cover plate 30 is threadedly connected to the first opening 11 of the housing 10. When the battery 100 is replenished, the second cover plate 30 is removed from the first opening 11 of the housing 10, and the pulling member 24 is used to rupture the weak portion 21 to form a liquid injection port 26, and the electrolyte is injected into the battery 100 through the liquid injection port 26. After the battery 100 is replenished, the second cover plate 30 is arranged at the first opening 11 of the housing 10, and the second cover plate 30 and the housing 10 are sealed.

[0057] See also Figures 12-13 In some embodiments, the weak portion 21 divides the first cover plate 20 into a connecting portion 22 and a separating portion 23, the connecting portion 22 is connected to the inner wall 12 of the shell 10, the separating portion 23 is located in the middle of the connecting portion 22, and the pulling member 24 is arranged on the weak portion 21 or on the separating portion 23 close to the edge of the weak portion 21. The first cover plate 20 is divided into a connecting portion 22 and a separating portion 23 by the weak portion 21. The first cover plate 20 is connected to the inner wall 12 of the shell 10 by the connecting portion 22. Since the pulling member 24 is arranged on the weak portion 21 or on the separating portion 23 near the edge of the weak portion 21, when the battery 100 is replenished, the pulling member 24 is used to enable the separating portion 23 to be broken or separated along the weak portion 21, so that the weak portion 21 is ruptured to form a liquid injection port 26. The electrolyte can be injected into the battery 100 through the liquid injection port 26, effectively realizing the liquid replenishment of the battery 100, thereby improving the cycle performance of the battery 100 and extending the service life of the battery 100.

[0058] Furthermore, a notch 25 is formed on the first cover plate 20 corresponding to the weak portion 21, and the area surrounded by the notch 25 is the separation portion 23. This effectively makes it easier for the separation portion 23 to break or separate along the line of the notch 25 when subjected to external force or internal pressure, thereby facilitating the refilling of the battery 100.

[0059] It can be understood that the pulling member 24 is a pull ring, one end of which is riveted to the edge of the weak portion 21 or the separation portion 23 close to the weak portion 21, and the other end of the pull ring has a hollow area. The pull ring is pulled through the hollow area, and the separation portion 23 is broken or separated along the weak portion 21, so that the weak portion 21 is broken to form a liquid injection port 26, and the electrolyte can be injected into the battery 100 through the liquid injection port 26, effectively realizing the liquid replenishment of the battery 100, thereby improving the cycle performance of the battery 100 and extending the service life of the battery 100.

[0060] See also Figure 1 , Figure 4 , Figures 6 to 13 In some embodiments, the battery 100 further includes an insulating seal 80, which is disposed between the first cover plate 20 and the inner side wall 12 of the housing 10. The insulating seal 80 effectively avoids direct contact between the first cover plate 20 and the inner side wall 12 of the housing 10, effectively insulates the first cover plate 20 and the housing 10, and thus prevents the battery 100 from short circuiting.

[0061] Furthermore, the insulating seal 80 has a sealing ring groove 81, and the edge of the first cover plate 20 is arranged in the sealing ring groove 81. This effectively increases the connection strength between the insulating seal 80 and the first cover plate 20, and improves the connection effect between the insulating seal 80 and the first cover plate 20.

[0062] It is understandable that, in order to improve the sealing effect of the battery 100 , a sealant layer 90 is coated on the connection between the edge of the insulating seal 80 and the shell 10 or the connection between the first cover plate 20 .

[0063] See also Figures 1 to 11 In some embodiments, the inner side wall 12 of the housing 10 is provided with a first protrusion 50, and the first protrusion 50 abuts against the lower surface of the first cover plate 20. Through the provision of the first protrusion 50, the first protrusion can support the first cover plate 20 and assist in the installation of the first cover plate 20. In addition, the first protrusion 50 can also limit the battery cell 40 to prevent the battery cell 40 from shaking due to the influence of external force on the battery 100.

[0064] Further, the first convex portion 50 has any of the following configurations:

[0065] First arrangement M1: The first protrusion 50 protrudes from the inner side wall 12 of the housing 10 into the accommodating space 14. In this case, the first protrusion 50 and the housing 10 can be an integrally formed structure, that is, the first protrusion 50 and the housing 10 are one component. The first protrusion 50 and the housing 10 can also be a split-formed structure, that is, the first protrusion 50 and the housing 10 are two separate components.

[0066] Second arrangement M2: The side wall 12 of the housing 10 protrudes toward the accommodating space 14 near the first opening 11. In this case, the first protrusion 50 and the housing 10 are an integrally formed structure, that is, the first protrusion 50 and the housing 10 are one component. The side wall 12 of the housing 10 can form the first protrusion 50 by rolling grooves.

[0067] See also Figures 1 to 11 In some embodiments, an insulating member 70 is disposed between the first protrusion 50 and the battery cell 40. By disposing the insulating member 70, the insulating member 70 is disposed between the first protrusion 50 and the end surface of the battery cell 40, effectively preventing the end surface of the battery cell 40 from directly contacting the first protrusion 50, effectively insulating the first protrusion 50 and the battery cell 40, thereby preventing the battery 100 from short-circuiting.

[0068] See also Figures 1 to 11 In some embodiments, the inner side wall 12 of the housing 10 is provided with a second protrusion 60, and the second protrusion 60 abuts against the lower surface or the upper surface of the second cover plate 30. By the provision of the second protrusion 60, when the second protrusion 60 is provided on the lower surface of the second cover plate 30, the second protrusion 60 is located between the first cover plate 20 and the second cover plate 30, and the second protrusion 60 can not only support the second cover plate 30 and assist the installation of the second cover plate 30, but also cooperate with the first protrusion 50 to limit the first cover plate 20 between the first protrusion 50 and the second protrusion 60, effectively limiting the first cover plate 20, so as to ensure that the first cover plate 20 will not easily slide out or move when subjected to external force. When the second protrusion 60 is provided on the upper surface of the second cover plate 30, the second cover plate 30 is located between the first cover plate 20 and the second protrusion 60, and the second cover plate 30 can be directly installed on the first cover plate 20, thereby improving space utilization.

[0069] Further, the second convex portion 60 has any of the following configurations:

[0070] First arrangement mode N1: The second protrusion 60 protrudes from the inner side wall 12 of the housing 10 into the accommodating space 14. In this case, the second protrusion 60 and the housing 10 are an integrally formed structure, that is, the second protrusion 60 and the housing 10 are one component. The second protrusion 60 and the housing 10 are a split structure, that is, the second protrusion 60 and the housing 10 are two separate components.

[0071] Second arrangement mode N2: The edge of the housing 10 located at the first opening 11 is bent toward the accommodating space 14. In this case, the second protrusion 60 and the housing 10 are an integrally formed structure, that is, the second protrusion 60 and the housing 10 are one component. Moreover, the second protrusion 60 is a folded edge structure of the housing 10 located at the first opening 11.

[0072] Third arrangement N3: The side wall 12 of the housing 10 protrudes toward the accommodating space 14 near the first opening 11. In this case, the second protrusion 60 and the housing 10 are an integrally formed structure, that is, the second protrusion 60 and the housing 10 are one component. The side wall 12 of the housing 10 can form the second protrusion 60 by rolling grooves.

[0073] Further, when the second protrusion 60 is in the first setting mode N1, the width b of the second protrusion 60 is smaller than the width a of the first protrusion 50, so as to facilitate the installation of the first cover plate 20. Since an installation area is formed between the first protrusion 50 and the second protrusion 60, the first cover plate 20 and the insulating seal 80 need to be deformed and pressed into the installation area. If the width b of the second protrusion 60 is greater than or equal to the width a of the first protrusion 50, the first cover plate 20 and the insulating seal 80 cannot be pressed into the installation area, thereby failing to seal the first opening 11 of the housing 10.

[0074] When the second protrusion 60 is in the second arrangement mode N2 or the third arrangement mode N3 , the width b of the second protrusion 60 is less than or equal to the width a of the first protrusion 50 .

[0075] It is understandable that the arrangement of the first protrusion 50 and the arrangement of the second protrusion 60 can be combined at will, and the present invention has no specific limitation on this.

[0076] See also Figures 1 to 3 , Figure 5 and Fig. 9 In some embodiments, the shell 10 includes a side wall 12 and a bottom wall 13, the first opening 11 is arranged at one end of the side wall 12, the bottom wall 13 is connected to the other end of the side wall 12, and a through hole 131 is arranged on the bottom wall 13, and a pole 132 is passed through the through hole 131, and the pole 132 is insulated and connected to the bottom wall 13, and the battery cell 40 includes a main body 41, a first pole ear 42 and a second pole ear 43, the first pole ear 42 and the second pole ear 43 are both arranged on one side of the main body 41, the first pole ear 42 is connected to the side wall 12 or the bottom wall 13, and the second pole ear 43 is connected to the pole 132.

[0077] It is understandable that the side wall 12 and the bottom wall 13 can be an integrally formed structure, that is, the side wall 12 and the bottom wall 13 are one component. Of course, the side wall 12 and the bottom wall 13 can also be a split structure, that is, the side wall 12 and the bottom wall 13 are two components, the other end of the side wall 12 is provided with a second opening, the bottom wall 13 is provided at the second opening, and the bottom wall 13, the side wall 12 and the first cover plate 20 enclose the accommodating space 14.

[0078] It can be understood that when the first protrusion 50 is in the first setting mode M1 and the second protrusion 60 is in the first setting mode N1, and the first protrusion 50, the second protrusion 60 and the shell 10 are an integrally formed structure, the side wall 12 and the bottom wall 13 are split structures so that the battery cell 40 can enter the shell from the second opening of the side wall 12.

[0079] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A battery, characterized in that: The invention comprises a shell (10), a first cover plate (20) and a battery cell (40); a first opening (11) is provided at one end of the shell (10); the first cover plate (20) is arranged at the first opening (11); an accommodating space (14) is formed between the first cover plate (20) and the shell (10); the battery cell (40) is arranged in the accommodating space (14); a weak portion (21) is provided on the first cover plate (20); a pulling piece (24) is provided on the weak portion (21) or on the edge of the first cover plate (20) close to the weak portion (21).

2. The battery according to claim 1, characterized in that: The weak portion (21) divides the first cover plate (20) into a connecting portion (22) and a separating portion (23); the connecting portion (22) is connected to the inner side wall (12) of the shell (10); the separating portion (23) is located in the middle of the connecting portion (22); and the pulling member (24) is arranged on the weak portion (21) or on the separating portion (23) near the edge of the weak portion (21).

3. The battery according to claim 2, characterized in that: A notched groove (25) is formed on the first cover plate (20) corresponding to the weak portion (21), and the area surrounded by the notched groove (25) is the separation portion (23).

4. The battery according to any one of claims 1 to 3, characterized in that: When the pulling member (24) ruptures the weak portion (21) to form a liquid injection port (26) and completes liquid injection, the first opening (11) of the shell (10) is provided with a second cover plate (30), and the second cover plate (30) is provided on a side of the first cover plate (20) away from the battery cell (40).

5. The battery according to claim 4, characterized in that: The inner side wall (12) of the housing (10) is provided with a first protrusion (50), and the first protrusion (50) abuts against the lower surface of the first cover plate (20); The first protrusion (50) protrudes from the inner side wall (12) of the shell (10) into the accommodating space (14); or the side wall (12) of the shell (10) protrudes toward the accommodating space (14) at a position close to the first opening (11).

6. The battery according to claim 5, characterized in that: The inner side wall (12) of the housing (10) is provided with a second protrusion (60), and the second protrusion (60) abuts against the lower surface or the upper surface of the second cover plate (30); The second protrusion (60) protrudes from the inner side wall (12) of the shell (10) into the accommodating space (14); or, the edge of the shell (10) located at the first opening (11) is bent toward the accommodating space (14); or, the side wall (12) of the shell (10) protrudes toward the accommodating space (14) at a position close to the first opening (11).

7. The battery according to claim 6, characterized in that: The width (b) of the second convex portion (60) is less than or equal to the width (a) of the first convex portion (50).

8. The battery according to claim 5, characterized in that: An insulating member (70) is provided between the first protrusion (50) and the battery core (40).

9. The battery according to any one of claims 1 to 3, characterized in that: It also includes an insulating seal (80), which is arranged between the first cover plate (20) and the inner side wall (12) of the shell (10); the insulating seal (80) has a sealing ring groove (81), and the edge of the first cover plate (20) is arranged in the sealing ring groove (81).

10. An electrical device, characterized in that: A battery comprising any one of claims 1 to 9.

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