Explosion-proof battery cover plate assembly and battery

Abstract

The utility model belongs to the technical field of steel shell buckle batteries, and particularly relates to an explosion-proof battery cover plate assembly and a battery. An explosion-proof battery cover plate assembly comprises a cover plate body and a conductive piece, the cover plate body is provided with a through mounting hole, the conductive piece comprises a protrusion matched with the mounting hole, the protrusion is mounted in the mounting hole, an explosion-proof hole for explosion prevention is formed in the protrusion, one end of the explosion-proof hole is open, and the other end of the explosion-proof hole is open. The other end is closed or opened. The strength of the conductive part is low, the explosion-proof hole can be carved through a mechanical mold when the conductive part is produced, the conductive part with the explosion-proof hole can be produced without adding extra procedures, and the production cost of the explosion-proof hole can be further reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel shell button batteries, in particular to an explosion-proof battery cover assembly and a battery. Background Art

[0002] Metal shell batteries are widely used in portable electronic products. In order to meet consumers' demand for high endurance, high safety and personalization of electronic products, major battery manufacturers have begun to gradually manufacture button batteries. At present, the explosion-proof valve of button batteries is mostly set on the shell. Since the shell is mostly made of stainless steel with high material strength, most of them need laser to make the explosion-proof valve, which has the problem of high cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the problem of high cost in the prior art of setting an explosion-proof valve on a shell, an explosion-proof battery cover assembly and a battery are provided.

[0004] In order to solve the above technical problems, on the one hand, an embodiment of the utility model provides an explosion-proof battery cover assembly, including a cover body and a conductive member, the cover body is provided with a penetrating mounting hole, the conductive member includes a protrusion matching the mounting hole, the protrusion is installed in the mounting hole, and an explosion-proof hole for explosion prevention is provided in the protrusion, one end of the explosion-proof hole is open, and the other end is closed or open.

[0005] According to the explosion-proof battery cover assembly provided in this embodiment, the production cost of the explosion-proof valve can be reduced. In this embodiment, the other end of the explosion-proof hole is preferably closed, that is, the explosion-proof hole is a blind hole, so that the external environment can be prevented from contaminating the interior of the battery through the explosion-proof hole. When the explosion-proof hole is a blind hole, the thickness of the conductive part at the position where the explosion-proof hole is provided will be reduced. When the battery works abnormally and generates gas, the gas breaks through the weak part of the protrusion and leaks out, thereby preventing the battery from exploding. Of course, the setting of the explosion-proof hole as a through hole is also within the protection scope of this embodiment.

[0006] Optionally, the top of the explosion-proof hole is closed and the bottom is open. The explosion-proof hole is set as a blind hole, which can ensure the sealing of the battery and prevent the interior of the battery from being polluted by the external environment. At the same time, when the battery operates abnormally and generates gas, the gas enters the explosion-proof hole and breaks through the protrusion here to allow the gas to leak out, thereby preventing the battery from exploding. In addition, setting the opening of the explosion-proof hole at the bottom of the protrusion can facilitate the subsequent production of batteries. For example, an explosion-proof hole is set at the bottom of the protrusion, but no explosion-proof hole is set at the top of the protrusion, which can ensure that the conductive parts (pole) will not be crushed during the battery production process. Among them, the explosion-proof hole can be circular, semicircular, square, etc. Of course, the explosion-proof hole set at the top of the protrusion is also within the protection scope of the present utility model.

[0007] Optionally, the explosion-proof hole is arranged in the protrusion along the axial direction of the protrusion. Arranging the explosion-proof hole along the axial direction of the protrusion can facilitate the gas to break through the protrusion where the explosion-proof hole is arranged, thereby better preventing the battery from exploding. In this embodiment, it is preferred to arrange the explosion-proof hole on one side of the protrusion. Of course, the scheme of arranging the explosion-proof hole on both sides of the protrusion is also within the protection scope of the present utility model. Alternatively, the structure in which the explosion-proof hole is not arranged along the axis of the protrusion is also within the protection scope of this embodiment.

[0008] Optionally, the conductive member is further provided with an explosion-proof notch for explosion prevention. The function of the explosion-proof notch is the same as that of the explosion-proof hole, which is to reduce the thickness of the conductive member so that the gas can easily break through the conductive member and overflow from the mounting hole. There is no necessary positional relationship between the explosion-proof notch and the explosion-proof hole. The explosion-proof notch can be entirely arranged in the explosion-proof hole, or the explosion-proof notch may not be entirely arranged in the explosion-proof hole. In addition, the explosion-proof hole may be entirely arranged in the explosion-proof notch, or the explosion-proof hole may not be entirely arranged in the explosion-proof notch. In the present embodiment, the explosion-proof notch is preferably interfered with the explosion-proof hole. Under the joint action of the explosion-proof notch and the explosion-proof hole, the position where the explosion-proof notch and the explosion-proof hole are simultaneously arranged in the protrusion is made thinner (there is still a partial protrusion between the explosion-proof notch and the explosion-proof hole), so the pressure relief pressure of the battery can be further reduced. When the battery generates less gas, it will first break through the position where the explosion-proof notch and the explosion-proof hole are set in the conductive part; when the battery generates more gas, it will further break through the place where the explosion-proof notch and the explosion-proof hole do not interfere with each other, thereby making the gas leakage hole larger, allowing the gas to leak out in time and avoiding the battery from exploding. At the same time, the explosion-proof hole and the explosion-proof notch can be set on the same side of the protrusion, or the explosion-proof hole and the explosion-proof notch can be set on two opposite sides of the protrusion. The setting of the explosion-proof notch can further ensure that the gas can break through the protrusion, thereby avoiding the battery from exploding.

[0009] Optionally, the explosion-proof notch is arc-shaped. Of course, the explosion-proof notch can also be circular, semicircular, square, etc. The explosion-proof notch can be arranged at the top or bottom of the protrusion.

[0010] Optionally, the orthographic projection of the explosion-proof hole on the surface of the protrusion along the axial direction of the protrusion covers the orthographic projection of the explosion-proof notch on the surface of the protrusion along the axial direction of the protrusion. In this way, the thickness of the conductive part at the location where the explosion-proof notch and the explosion-proof hole are provided can be further reduced, so that the gas can be more easily broken through the conductive part here and leaked out. It should be noted that only one of the explosion-proof hole or the explosion-proof notch is provided, and by deepening the depth of the explosion-proof hole or the explosion-proof notch or, although the same explosion-proof effect can be achieved, the purpose of the explosion-proof notch provided in the present device is to obtain a better explosion-proof effect without reducing the anti-extrusion ability of the conductive part. In this embodiment, the explosion-proof hole is preferably a semicircular blind hole, and the explosion-proof notch is preferably an arc. In the process of battery manufacturing, the conductive part may be squeezed. If only one of the explosion-proof hole or the explosion-proof notch is provided, and at the same time, in order to enhance the explosion-proof effect, the depth of the entire explosion-proof hole or the explosion-proof notch is processed to a deeper depth, the anti-extrusion ability of the conductive part at this position is very low, and it is difficult to take into account both explosion-proof and anti-extrusion abilities. The device, by adding explosion-proof notches on the premise of setting explosion-proof holes, only reduces the thickness of the conductive member at some explosion-proof holes, so that the conductive member at the explosion-proof hole position of the device has a certain anti-extrusion ability and can increase the explosion-proof effect of the device. The explosion-proof notches can be set in the explosion-proof hole or on the opposite side of the protrusion where the explosion-proof hole is set.

[0011] Optionally, the explosion-proof notch is located at the top of the protrusion. In the present embodiment, the explosion-proof hole is located at the bottom of the protrusion, which is convenient for production.

[0012] Optionally, a pin for welding is provided on the top of the protrusion, and the orthographic projection of the pin on the surface of the protrusion is located outside the orthographic projection of the explosion-proof hole on the surface of the protrusion. In this embodiment, the pin is provided at a position where the protrusion is not provided with a countersunk hole, which can reduce the risk of welding through.

[0013] Optionally, the cover body is a stainless steel cover body, and the conductive member is an aluminum conductive member. In button batteries, the cover body and the battery housing are mostly stainless steel products, the conductive member is an aluminum product, and the cover assembly covers the positive electrode position of the battery housing. Because the steel material has high strength, the existing technology mostly first makes a steel housing, and then adds an additional laser valve engraving process, and uses a laser to engrave the valve on the housing to produce an explosion-proof valve, which is costly. However, the strength of the conductive member (aluminum product) is relatively low. When producing the conductive member, the explosion-proof hole can be engraved by a mechanical mold (tool), and no additional process is required to generate a conductive member with an explosion-proof hole, thereby reducing the production cost of the explosion-proof hole (explosion-proof valve). At the same time, compared with setting a blind hole in the housing, because the strength of the conductive member is much smaller than the strength of the housing, the pressure required for the gas to break through the blind hole in the conductive member is less than the pressure required to break through the blind hole in the housing, which can reduce the pressure relief pressure of the explosion-proof valve, thereby further reducing the safety hazards of the battery.

[0014] Optionally, an insulating member is provided between the conductive member and the cover body, so as to avoid short circuit of the battery. The insulating member has sealing and insulating functions, so as to avoid short circuit of the positive and negative electrodes in the battery, and also to avoid the electrolyte and other substances in the battery from flowing to the outside of the battery.

[0015] On the other hand, an embodiment of the utility model provides a battery, including a shell and a conductive part, the shell is provided with a penetrating mounting hole, the conductive part includes a protrusion matching the mounting hole, the protrusion is installed in the mounting hole, the protrusion is provided with an explosion-proof hole for explosion-proof, one end of the explosion-proof hole is open, and the other end is closed or open.

[0016] On the other hand, an embodiment of the utility model provides a battery, comprising a shell and the above-mentioned explosion-proof battery cover assembly, wherein the explosion-proof battery cover assembly is covered on the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an explosion-proof battery cover assembly provided by an embodiment of the utility model from a first perspective;

[0018] Figure 2 This is a structural schematic diagram of an explosion-proof battery cover assembly provided by an embodiment of the utility model from a second viewing angle;

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure cut along AA;

[0020] Figure 4 yes Figure 3 Enlarged view of B.

[0021] The reference numerals in the specification are as follows:

[0022] 1. Cover body; 2. Conductive parts; 3. Mounting holes; 4. Protrusions; 5. Explosion-proof holes; 6. Explosion-proof notches; 7. Pin feet; 8. Insulating parts. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] like Figures 1 to 4As shown, an embodiment of the utility model provides an explosion-proof battery cover assembly, including a cover body 1 and a conductive member 2, the cover body 1 is provided with a penetrating mounting hole 3, the conductive member 2 includes a protrusion 4 matching the mounting hole 3, the protrusion 4 is installed in the mounting hole 3, and an explosion-proof hole 5 for explosion prevention is provided in the protrusion 4, one end of the explosion-proof hole 5 is open, and the other end is closed or open.

[0025] According to the explosion-proof battery cover assembly provided in this embodiment, the production cost of the explosion-proof valve can be reduced. In this embodiment, the other end of the explosion-proof hole 5 is preferably closed, that is, the explosion-proof hole 5 is a blind hole, so that the external environment can be prevented from polluting the inside of the battery through the explosion-proof hole 5. When the explosion-proof hole 5 is a blind hole, the thickness of the conductive member 2 at the position where the explosion-proof hole 5 is provided will be reduced. When the battery works abnormally and produces gas, the gas breaks through the weak part of the protrusion 4 and leaks out, thereby preventing the battery from exploding. At the same time, relative to setting a blind hole in the shell, because the strength of the conductive member 2 is much smaller than the strength of the shell, the pressure required for the gas to break through the blind hole in the conductive member 2 is less than the pressure required to break through the blind hole in the shell, so that the pressure relief pressure of the explosion-proof hole 5 (acting as an explosion-proof valve) can be reduced, thereby further reducing the safety hazards of the battery. Of course, the setting of the explosion-proof hole as a through hole is also within the protection scope of this embodiment.

[0026] In one embodiment, the top of the explosion-proof hole 5 is closed and the bottom is open. The explosion-proof hole 5 is set as a blind hole, which can ensure the sealing of the battery and prevent the interior of the battery from being polluted by the external environment. At the same time, when the battery works abnormally and generates gas, the gas enters the explosion-proof hole 5 and breaks through the protrusion 4 here to allow the gas to leak out, thereby preventing the battery from exploding. In addition, setting the opening of the explosion-proof hole at the bottom of the protrusion 4 can facilitate the subsequent production of batteries. For example, the explosion-proof hole 5 is set at the bottom of the protrusion, and the explosion-proof hole 5 is not set at the top of the protrusion 4, which can ensure that the conductive part (pole) will not be collapsed during the battery production process. Among them, the explosion-proof hole 5 can be circular, semicircular, square, etc. The explosion-proof hole 5 can be set at the top of the protrusion 4 and is also within the protection scope of the present utility model.

[0027] In one embodiment, the explosion-proof hole 5 is provided in the protrusion 4 along the axial direction of the protrusion 4. Providing the explosion-proof hole 5 along the axial direction of the protrusion 4 can facilitate the gas to break through the protrusion 4 where the explosion-proof hole 5 is provided, thereby better preventing the battery from exploding. In this embodiment, it is preferred to provide the explosion-proof hole 5 on one side of the protrusion 4. Of course, the scheme of providing the explosion-proof hole 5 on both sides of the protrusion 4 is also within the protection scope of the present utility model. Alternatively, the structure in which the explosion-proof hole 5 is not provided along the axis of the protrusion 4 is also within the protection scope of this embodiment.

[0028] In one embodiment, the conductive member 2 is further provided with an explosion-proof notch 6 for explosion-proof. The function of the explosion-proof notch 6 is the same as that of the explosion-proof hole 5, which is to reduce the thickness of the conductive member 2 so that the gas can easily break through the conductive member 2 and overflow from the mounting hole 3. There is no necessary positional relationship between the explosion-proof notch 6 and the explosion-proof hole 5. The explosion-proof notch 6 can be entirely arranged in the explosion-proof hole 5, or the explosion-proof notch 6 can not be entirely arranged in the explosion-proof hole 5. In addition, the explosion-proof hole 5 can be entirely arranged in the explosion-proof notch 6, or the explosion-proof hole 5 can not be entirely arranged in the explosion-proof notch 6. In this embodiment, the explosion-proof notch 6 preferably interferes with the explosion-proof hole 5. Under the joint action of the explosion-proof notch 6 and the explosion-proof hole 5, the position where the explosion-proof notch 6 and the explosion-proof hole 5 are simultaneously arranged in the protrusion 4 is thinner (there is still a part of the protrusion 4 between the explosion-proof notch 6 and the explosion-proof hole 5), so the pressure relief pressure of the battery can be further reduced. When the battery generates less gas, it will first break through the position where both the explosion-proof notch 6 and the explosion-proof hole 5 are provided in the protrusion 4; when the battery generates more gas, it will further break through the place where the explosion-proof notch 6 and the explosion-proof hole 5 do not interfere with each other, thereby making the gas leakage hole larger, allowing the gas to be released in time to avoid the battery from exploding. At the same time, the explosion-proof hole 5 and the explosion-proof notch 6 can be set on the same side of the conductive member 2, and the explosion-proof hole 5 and the explosion-proof notch 6 can also be set on both sides of the conductive member 2. The setting of the explosion-proof notch 6 can further ensure that the gas can break through the protrusion 4, thereby avoiding the battery from exploding.

[0029] In one embodiment, the explosion-proof notch 6 is arc-shaped. Of course, the explosion-proof notch 6 can also be circular, semicircular, square, etc. The explosion-proof notch 6 can be set at the top or bottom of the protrusion 4.

[0030] In one embodiment, the orthographic projection of the explosion-proof hole 6 on the surface of the protrusion 4 along the axial direction of the protrusion 4 covers the orthographic projection of the explosion-proof notch 5 on the surface of the protrusion 4 along the axial direction of the protrusion 4. In this way, the thickness of the conductive part 2 where the explosion-proof notch 6 and the explosion-proof hole 5 are provided can be further reduced, thereby making it easier for the gas to break through the conductive part 2 there and leak out. It should be noted that only one of the explosion-proof hole 5 or the explosion-proof notch 6 is provided, and although the same explosion-proof effect can be achieved by deepening the depth of the explosion-proof hole 5 or the explosion-proof notch 6, the purpose of providing the explosion-proof notch 6 in the present device is to obtain a better explosion-proof effect without reducing the anti-extrusion ability of the conductive part 2. In the present embodiment, the explosion-proof hole 5 is preferably a semicircular blind hole, and the explosion-proof notch 6 is preferably an arc. During the battery manufacturing process, the conductive part 2 may be squeezed. If only one of the explosion-proof hole 5 or the explosion-proof notch 6 is set, and at the same time, in order to enhance the explosion-proof effect, the entire explosion-proof hole 5 or the explosion-proof notch 6 is processed to a deeper depth, then the anti-extrusion ability of the conductive part 2 at this position is very low, and it is difficult to take into account both explosion-proof and anti-extrusion abilities. However, by adding the explosion-proof notch 6 on the premise of setting the explosion-proof hole 5, the thickness of the conductive part 2 at part of the explosion-proof hole 5 is only reduced, so that the conductive part 2 at the position of the explosion-proof hole 5 of the device has a certain anti-extrusion ability and can increase the explosion-proof effect of the device. Among them, the explosion-proof notch 6 can be set in the explosion-proof hole 5, and can also be set on the opposite side of the protrusion 4 where the explosion-proof hole 5 is set.

[0031] In one embodiment, the explosion-proof notch 6 is disposed at the top of the protrusion 4. In this embodiment, the explosion-proof hole 5 is disposed at the bottom of the protrusion 4, which is convenient for production.

[0032] In one embodiment, a pin foot 7 for welding is provided on the top of the protrusion 4, and the orthographic projection of the pin foot 7 on the surface of the protrusion 4 is located outside the orthographic projection of the explosion-proof hole 5 on the surface of the protrusion 4. In this embodiment, the pin foot 7 is arranged at a position where there is no countersunk hole in the protrusion 4, which can reduce the risk of welding through. It should be noted that Figure 3 and Figure 4 The pin 7 in the circuit is not located directly above the explosion-proof notch 6, nor does it cover the explosion-proof notch 6, because Figure 3 and Figure 4 It is a cross-sectional view, which may cause misunderstanding to some people, so when understanding the present device, it is necessary to combine it with the other drawings to facilitate understanding of the overall structure of the present device.

[0033] In one embodiment, the cover body 1 is a stainless steel cover body, and the conductive member 2 is an aluminum conductive member. In button batteries, the cover body 1 and the battery housing are generally stainless steel products, and the conductive member 2 is mostly aluminum products, and the cover assembly covers the positive electrode position of the battery housing. Because the steel material has high strength, the existing technology mostly first produces a steel housing, and then adds an additional laser valve engraving process, and uses a laser to engrave the valve on the housing to produce an explosion-proof valve, which is costly. However, the strength of the conductive member 2 (aluminum product) is relatively low. When producing the conductive member 2, the explosion-proof hole 5 can be engraved by a mechanical mold (tool), and the conductive member 2 with the explosion-proof hole 5 can be generated without adding additional processes, thereby reducing the production cost of the explosion-proof hole 5 (explosion-proof valve).

[0034] In one embodiment, an insulating member 8 is provided between the conductive member 2 and the cover body 1. This can prevent the battery from short-circuiting. The insulating member 8 has a sealing and insulating function, which can prevent the positive and negative electrodes in the battery from short-circuiting, and can also prevent the electrolyte and other substances in the battery from flowing to the outside of the battery.

[0035] On the other hand, an embodiment of the utility model provides a battery, including a shell and a conductive part 2, the shell is provided with a penetrating mounting hole, the conductive part 2 includes a protrusion 4 matching the mounting hole, the protrusion 4 is installed in the mounting hole, and the protrusion 4 is provided with an explosion-proof hole 5 for explosion-proofing, one end of the explosion-proof hole 5 is open, and the other end is closed or open.

[0036] On the other hand, the embodiment of the utility model provides a battery, including a housing and the above-mentioned explosion-proof battery cover assembly, the explosion-proof battery cover assembly is covered on the housing. At the same time, in this embodiment, a battery cell is arranged in the housing, and the conductive member 2 (aluminum pole) is connected to the positive electrode (pole ear) of the battery cell. The battery in this embodiment is a button battery.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An explosion-proof battery cover assembly, characterized in that: It includes a cover body and a conductive member, wherein the cover body is provided with a penetrating mounting hole, the conductive member includes a protrusion matching the mounting hole, the protrusion is installed in the mounting hole, an explosion-proof hole for explosion prevention is provided in the protrusion, one end of the explosion-proof hole is open, and the other end is closed or open.

2. The explosion-proof battery cover assembly according to claim 1, characterized in that: The top end of the explosion-proof hole is closed, and the bottom end is open.

3. The explosion-proof battery cover assembly according to claim 1, characterized in that: The explosion-proof hole is arranged in the protrusion along the axial direction of the protrusion.

4. The explosion-proof battery cover assembly according to any one of claims 1 to 3, characterized in that: The protrusion is also provided with explosion-proof notches for explosion-proofing.

5. The explosion-proof battery cover assembly according to claim 4, characterized in that: The orthographic projection of the explosion-proof hole on the surface of the protrusion along the axial direction of the protrusion covers the orthographic projection of the explosion-proof notch on the surface of the protrusion along the axial direction of the protrusion.

6. The explosion-proof battery cover assembly according to claim 4, characterized in that: The explosion-proof notch is arc-shaped.

7. The explosion-proof battery cover assembly according to claim 4, characterized in that: The explosion-proof notch is arranged on the top of the protrusion.

8. The explosion-proof battery cover assembly according to claim 1, characterized in that: A pin for welding is also provided on the top of the protrusion, and the orthographic projection of the pin on the surface of the protrusion is located outside the orthographic projection of the explosion-proof hole on the surface of the protrusion.

9. The explosion-proof battery cover assembly according to claim 1, characterized in that: The cover plate body is a stainless steel cover body, and the conductive member is an aluminum conductive member.

10. A battery, characterized in that: It comprises a shell and a conductive part, wherein the shell is provided with a penetrating mounting hole, the conductive part comprises a protrusion matching the mounting hole, the protrusion is installed in the mounting hole, an explosion-proof hole for explosion prevention is provided in the protrusion, one end of the explosion-proof hole is open, and the other end is closed or open.

11. A battery, characterized in that: It comprises a shell and the explosion-proof battery cover assembly according to any one of claims 1 to 9, wherein the explosion-proof battery cover assembly is covered on the shell.

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