Ultra-thin explosion-proof assembled battery cap

Abstract

The utility model discloses an ultra-thin explosion-proof assembled battery cap which comprises a battery cap steel cap and a battery cap rubber sealing ring arranged at the outer end of the battery cap steel cap, an anti-explosion piece is arranged on the outer side face of a steel cap of the battery cap, the thickness of the anti-explosion piece before improvement is 4 mm, the thickness of the steel cap of the battery cap is 8 mm and is large, a rubber sealing ring of the battery cap needs to be designed to be high, and the anti-explosion piece and the steel cap of the battery cap are connected through welding point arc welding after being riveted. After improvement, the thickness of the explosion-proof piece is designed to be 0.5 mm, the thickness of the battery cap steel cap is 0.5 mm, meanwhile, a riveting process is omitted, the battery cap steel cap and the explosion-proof piece are directly connected through welding spot line welding, the design height of a battery cap rubber sealing ring can be greatly reduced, and the overall height of the battery cap steel cap is greatly reduced; and the battery capacity is improved, so that the practicability of the explosion-proof assembled battery cap in use is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to the electronics and battery manufacturing industries, and particularly relates to an ultra-thin explosion-proof combined battery cap. Background Art

[0002] A chemical power source, also known as a battery, is a device that converts chemical energy directly into electrical energy. It consumes certain chemicals through a chemical reaction and outputs electrical energy. Most common batteries are chemical power sources. They are widely used in the national economy, science and technology, military affairs, and daily life.

[0003] The battery cap is a crucial component of the battery, located at the top and performing multiple functions. For lithium-ion batteries, the cap not only seals the battery but also acts as a safety valve, serving as a positive conductive terminal and preventing electrolyte leakage. Furthermore, the cap provides overcharge protection, protects against external short circuits, reduces internal resistance, and ensures battery safety.

[0004] However, the traditional explosion-proof combination battery cap explosion-proof plate and steel cap are relatively thick, so the sealing ring needs to be designed to be higher in height, and the explosion-proof plate and steel cap are first riveted and then connected by arc welding. Therefore, its battery capacity is relatively small and the sealing ring is designed to be higher in height.

[0005] The utility model improves the above-mentioned problem and specifically relates to an ultra-thin explosion-proof combined battery cap. Utility Model Content

[0006] The purpose of the present utility model is to provide an ultra-thin explosion-proof combined battery cap to solve the problem proposed in the above background technology that the explosion-proof plate and steel cap of the traditional explosion-proof combined battery cap are relatively thick, so the sealing ring needs to be designed to be relatively high, and the explosion-proof plate and the steel cap are first riveted and then connected by arc welding, so the battery capacity is relatively small and the sealing ring is designed to be relatively high.

[0007] To achieve the above object, the utility model provides the following technical solutions: an ultra-thin explosion-proof combined battery cap, comprising a battery cap steel cap and a battery cap rubber sealing ring provided at the outer end of the battery cap steel cap;

[0008] An explosion-proof plate is provided at the outer side surface of the battery cap steel cap. Before improvement, the thickness of the explosion-proof plate is 0.4 mm, and the thickness of the battery cap steel cap is 0.8 mm. The thickness is relatively thick, so the battery cap rubber sealing ring needs to be designed to be higher, and the explosion-proof plate and the battery cap steel cap are first riveted and then connected by welding point arc welding. After improvement, the thickness of the explosion-proof plate is designed to be 0.3 mm, and the thickness of the battery cap steel cap is 0.5 mm. At the same time, the riveting process is cancelled, and the battery cap steel cap and the explosion-proof plate are directly connected by welding point line welding. The design height of the battery cap rubber sealing ring can be greatly reduced.

[0009] Preferably, a connecting isolation ring is provided at the bottom of the explosion-proof disc, and the connecting isolation ring is made of PFA.

[0010] Preferably, a connecting aluminum sheet is provided at the bottom of the connecting isolation ring, and the connecting aluminum sheet is made of aluminum material.

[0011] Preferably, the battery cap steel cap is made of stainless steel, and the battery cap steel cap is sleeved in the groove of the battery metal shell through the inner circumference.

[0012] Preferably, an exhaust connection column is provided at the middle position of the battery cap steel cap, and a ventilation slot is provided at the exhaust connection column near the inner position of the side, and the end of the ventilation slot is connected to the outside of the battery cap steel cap.

[0013] Preferably, a connecting metal filter is provided at a middle position of the ventilation slot close to the outer side, and the connecting metal filter is connected to the ventilation slot by snapping.

[0014] Preferably, a lifting connection mounting piece is provided at the middle position of the exhaust connection column, and an elastic connection mounting spring is provided at the upper position of the lifting connection mounting piece. When the pressure on the upper side of the battery cap steel cap increases, the lifting connection mounting piece will be squeezed to rise, and then when the lifting connection mounting piece rises to the vent groove to expose the gas, the gas will leak out along the vent groove. After the internal and external pressures are restored, the lifting connection mounting piece can be restored due to the action of the elastic connection mounting spring.

[0015] Compared with the prior art, the present invention provides an ultra-thin explosion-proof combined battery cap, which has the following beneficial effects:

[0016] 1. In the ultra-thin explosion-proof combination battery cap, an explosion-proof piece is provided at the outer side of the battery cap steel cap. The thickness of the explosion-proof piece before improvement is 0.4 mm, and the thickness of the battery cap steel cap is 0.8 mm. The thickness is relatively thick, so the battery cap rubber sealing ring needs to be designed to be higher, and the explosion-proof piece and the battery cap steel cap are first riveted and then connected by welding point arc welding. After improvement, the thickness of the explosion-proof piece is designed to be 0.3 mm, and the thickness of the battery cap steel cap is 0.5 mm. At the same time, the riveting process is cancelled, and the battery cap steel cap and the explosion-proof piece are directly connected by welding point line welding. The design height of the battery cap rubber sealing ring can be greatly reduced, and the design height of the battery cap rubber sealing ring can be greatly reduced, which greatly reduces the overall height of the battery cap steel cap and improves the battery capacity.

[0017] 2. In the ultra-thin explosion-proof combination battery cap, an exhaust connection column is provided in the middle of the battery cap steel cap, and a venting slot is provided near the inner position of the exhaust connection column near the side. The end of the venting slot is connected to the outside of the battery cap steel cap, and a connecting metal filter is provided near the middle position of the venting slot near the outside. The connecting metal filter is connected to the venting slot by snap connection. A lifting connection mounting piece is provided in the middle of the exhaust connection column, and an elastic connection mounting spring is provided on the upper side of the lifting connection mounting piece. When the pressure on the upper side of the battery cap steel cap increases, the battery cap steel cap will be squeezed. The pressure lifting connection mounting piece rises, and then when the lifting connection mounting piece rises to the vent slot and the gas is exposed, it will leak out along the vent slot. After the internal and external pressures are restored, the lifting connection mounting piece can be restored due to the action of the elastic connection mounting spring. Because the air pressure at the bottom of the battery cap steel cap increases due to the increase in battery temperature, the increased air pressure can easily cause pressure on the battery cap steel cap and cause it to fall off. After the improvement, the air can be deflated and decompressed when the pressure at the bottom of the battery cap steel cap is high, thereby effectively avoiding the phenomenon of the battery cap steel cap falling off due to internal temperature and air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic top view of the improved structure of the ultra-thin explosion-proof combined battery cap of the present invention.

[0019] Figure 2 The figure is a schematic side cross-sectional structure diagram of the improved ultra-thin explosion-proof combined battery cap of the present invention.

[0020] Figure 3 The figure is a schematic diagram of the top view of the improved structure of the ultra-thin explosion-proof combined battery cap of the present invention.

[0021] Figure 4 The utility model is a schematic diagram of the improved front side cross-sectional structure of the ultra-thin explosion-proof combined battery cap.

[0022] Figure 5This is an enlarged structural diagram of the ultra-thin explosion-proof combined battery cap at position A of the utility model.

[0023] In the figure: 1. Battery cap rubber sealing ring; 2. Battery cap steel cap; 3. Welding point; 4. Explosion-proof plate; 5. Connecting aluminum plate; 6. Connecting isolation ring; 7. Exhaust connecting column; 8. Lifting connecting mounting plate; 9. Elastic connecting mounting spring; 10. Ventilation slot; 11. Connecting metal filter. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The utility model provides Figure 1-5 As shown, an ultra-thin explosion-proof combination battery cap comprises a battery cap steel cap 2 and a battery cap rubber sealing ring 1 arranged at the outer end of the battery cap steel cap 1; an explosion-proof plate 4 is arranged at the outer side surface of the battery cap steel cap 2. Before improvement, the thickness of the explosion-proof plate 4 is 0.4 mm, and the thickness of the battery cap steel cap 2 is 0.8 mm. The thickness is relatively thick, so the battery cap rubber sealing ring 1 needs to be designed to be higher, and the explosion-proof plate 4 and the battery cap steel cap 2 are first riveted and then connected by arc welding at the welding point 3. After improvement, the thickness of the explosion-proof plate 4 is designed to be 0.3 mm, and the thickness of the battery cap steel cap 2 is 0.5 mm. At the same time, the riveting process is cancelled, and the battery cap steel cap 2 and the explosion-proof plate 4 are directly connected by line welding at the welding point 3. The design height of the battery cap rubber sealing ring 1 can be greatly reduced, which greatly reduces the overall height of the battery cap steel cap, thereby improving the battery capacity.

[0026] like Figure 2 As shown, a connecting isolation ring 6 is provided at the bottom of the explosion-proof disc 4. The connecting isolation ring 6 is made of PFA. Its arrangement greatly improves the high temperature resistance and the safety of the cap.

[0027] like Figure 2 As shown, a connecting aluminum sheet 5 is provided at the bottom position of the connecting isolation ring 6, which is made of aluminum material. The battery cap steel cap 2 is made of stainless steel material. The battery cap steel cap 2 is sleeved in the groove of the battery metal shell through the inner circumference. The connecting aluminum sheet 5 is part of the cap, which helps to seal the battery and provide safety protection.

[0028] like Figure 5As shown, an exhaust connection column 7 is provided at the middle position of the battery cap steel cap 2, and a vent slot 10 is provided near the inner position of the side of the exhaust connection column 7. The end of the vent slot 10 is connected to the outer vent slot 10 of the battery cap steel cap 2. A connecting metal filter 11 is provided near the middle position of the outer side. The connecting metal filter 11 is connected to the vent slot 10 by snap connection. A lifting connection mounting piece 8 is provided at the middle position of the exhaust connection column 7, and an elastic connection mounting spring 9 is provided on the upper side of the lifting connection mounting piece 8. When the pressure on the upper side of the battery cap steel cap 2 increases, the lifting connection will be squeezed. The connecting mounting piece 8 rises, and then when the lifting connecting mounting piece 8 rises to the vent groove 10 to expose the gas, it will leak out along the vent groove 10. After the internal and external pressures are restored, the lifting connecting mounting piece 8 can be restored due to the action of the elastic connecting mounting spring 9. Because the air pressure at the bottom of the battery cap steel cap 2 increases due to the increase in battery temperature, the increased air pressure can easily cause pressure on the battery cap steel cap 2 and cause it to fall off. After the improvement, the air can be deflated and decompressed when the pressure at the bottom of the battery cap steel cap 2 is high, thereby effectively avoiding the phenomenon of the battery cap steel cap 2 falling off due to internal temperature and air pressure.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ultra-thin explosion-proof battery cap, comprising A battery cap steel cap (2) and a battery cap rubber sealing ring (1) provided at the outer end of the battery cap steel cap (2); Its characteristics are: The battery cap steel cap (2) is provided with an explosion-proof plate (4) at the outer side surface. Before the improvement, the thickness of the explosion-proof plate (4) is 0.4 mm, and the thickness of the battery cap steel cap (2) is 0.8 mm. The thickness is relatively thick, so the battery cap rubber sealing ring (1) needs to be designed to be higher, and the explosion-proof plate (4) and the battery cap steel cap (2) are first riveted and then connected by arc welding at the welding point (3). After the improvement, the thickness of the explosion-proof plate (4) is designed to be 0.3 mm, and the thickness of the battery cap steel cap (2) is 0.5 mm. At the same time, the riveting process is cancelled, and the battery cap steel cap (2) and the explosion-proof plate (4) are directly connected by line welding at the welding point (3). The design height of the battery cap rubber sealing ring (1) can be greatly reduced.

2. The ultra-thin explosion-proof assembled battery cap according to claim 1, characterized in that: A connecting isolation ring (6) is provided at the bottom of the explosion-proof disc (4), and the connecting isolation ring (6) is made of PFA.

3. The ultra-thin explosion-proof assembled battery cap according to claim 2, characterized in that: A connecting aluminum sheet (5) is provided at the bottom of the connecting isolation ring (6), and the connecting aluminum sheet (5) is made of aluminum material.

4. The ultra-thin explosion-proof assembled battery cap according to claim 1, characterized in that: The battery cap steel cap (2) is made of stainless steel material, and the battery cap steel cap (2) is sleeved in the groove of the battery metal shell through the inner peripheral surface.

5. The ultra-thin explosion-proof assembled battery cap according to claim 1, characterized in that: An exhaust connection column (7) is provided at the middle position of the battery cap steel cap (2), and a venting notch (10) is provided near the inner position of the side of the exhaust connection column (7), and the end of the venting notch (10) is connected to the outside of the battery cap steel cap (2).

6. The ultra-thin explosion-proof assembled battery cap according to claim 5, characterized in that: A connecting metal filter screen (11) is provided at a middle position close to the outer side of the ventilation slot (10), and the connecting metal filter screen (11) is connected to the ventilation slot (10) by snapping.

7. The ultra-thin explosion-proof assembled battery cap according to claim 6, characterized in that: A lifting connection mounting piece (8) is provided at the middle position of the exhaust connection column (7), and an elastic connection mounting spring (9) is provided at the upper side position of the lifting connection mounting piece (8). When the pressure on the upper side of the battery cap steel cap (2) increases, the lifting connection mounting piece (8) will be squeezed to rise, and then when the lifting connection mounting piece (8) rises to the vent slot (10) and the exposed gas will leak out along the vent slot (10), and after the internal and external pressures are restored, the lifting connection mounting piece (8) can be restored due to the action of the elastic connection mounting spring (9).

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