Lithium battery cap assembly

Abstract

The lithium battery cap assembly comprises a cap, a groove is formed in the bottom of the cap, a silica gel pad is fixedly installed on the inner wall of the groove, micropores are evenly formed in the inner wall of the silica gel pad, a bottom plate is fixedly installed on the inner wall of the bottom of the groove, and the bottom plate is electrically connected with the inner wall of the cap in a matched mode. The inner wall of the periphery of the bottom of the cap is fixedly connected with a protection plate through a first spring, and the protection plate is fixedly connected with the bottom plate through a conductive column. The impact force can act on the surface of the silica gel pad, so that the effects of noise reduction and vibration resistance are achieved, when implosion of the battery occurs and the PU film is damaged by vibration, airflow can be conveniently discharged into the space between the cap and the protective cover, the explosion-proof effect of the lithium battery is improved, and the use safety of the lithium battery is improved.

Description

Technical Field

[0001] The utility model relates to a lithium battery cap assembly, in particular to a lithium battery cap assembly. Background Art

[0002] The lithium battery cap is a key component in lithium-ion power batteries, also known as a power battery explosion-proof piece or a power battery explosion-proof valve. Existing lithium battery caps are generally composed of a metal cover plate and an insulating gasket. Since the conductive structure inside the lithium battery cap generally conducts electricity through the cap spring as a conductor, a cavity is formed inside the lithium battery cap. When the internal pressure of the lithium battery is too high and self-explodes, the internal gas of the lithium battery enters the cavity. The cap lacks a silencer or energy-absorbing structure, which may cause damage to the internal structure of the battery and cause it to be ejected. There are certain safety hazards and it is inconvenient to use. Utility Model Content

[0003] The purpose of the utility model is to provide a lithium battery cap assembly to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A lithium battery cap assembly comprises a cap, wherein a groove is provided inside the bottom of the cap, a silicone pad is fixedly installed on the inner wall of the groove, micropores are evenly provided on the inner wall of the silicone pad, a base plate is fixedly installed on the inner wall of the bottom of the groove, the base plate is electrically connected to the inner wall of the cap, the inner wall around the bottom of the cap is fixedly connected to a protective plate via a spring, and the protective plate and the base plate are fixedly connected via a conductive column.

[0006] In a preferred embodiment of the utility model, a conductive terminal is fixedly installed at the center of the outer wall of the top of the cap, and teeth are evenly fixedly installed around the bottom of the cap, and the teeth are used to cooperate with the outer wall of the end of the lithium battery for detachable fixed connection.

[0007] In a preferred embodiment of the present invention, the material of the cap and the base plate is set to be metallic copper, the surface of the cap and the base plate are electroplated with metallic zinc, and the material of the spring is set to be metallic copper.

[0008] In a preferred embodiment of the present invention, the inner walls around the bottom of the top cap of the spring are electrically connected, and the bottom end of the spring is electrically connected to the top of the protective plate.

[0009] In a preferred embodiment of the utility model, the inner wall of the bottom of the cap is fixedly connected to the protective cover, the outer wall of the protective cover is fixedly installed with a rubber protective pad, the inner wall of the protective plate is evenly provided with ventilation holes, and a PU film is fixedly installed inside the ventilation holes.

[0010] In a preferred embodiment of the utility model, the conductive column includes a sleeve 1, the inner wall of the sleeve 1 is slidably connected to the sleeve 2, a spring 2 is fixedly connected between the sleeve 1 and the sleeve 2, and the sleeve 1 and the sleeve 2 cooperate to support and conduct electricity between the protective plate and the base plate.

[0011] 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.

[0012] 1. By evenly fixing the conductive columns between the bottom plate and the protective plate, the stability of the protective plate installation can be improved, and the stability of the lithium battery power transmission can be improved during conduction;

[0013] 2. By fixing a silicone pad on the inner wall of the cap and evenly opening small holes inside the silicone pad, it is convenient for the impact force to act on the surface of the silicone pad after the airflow inside the battery is discharged, thereby playing a role in silencing and anti-vibration. At the same time, air vents are evenly opened on the inner wall of the protective plate, and a PU film is installed inside the air vent for waterproof and airproofing, thereby improving the safety of lithium battery use. When the battery implodes, the PU film is damaged by vibration, which facilitates the airflow to be discharged between the cap and the protective cover, thereby improving the explosion-proof effect of the lithium battery and improving the safety of lithium battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 It is a schematic diagram of the main structure of a lithium battery cap assembly;

[0016] Figure 2 A schematic diagram of the structure of a lithium battery cap assembly viewed from above;

[0017] Figure 3 A schematic diagram of the exploded structure of a lithium battery cap assembly;

[0018] Figure 4 This is a schematic diagram of a cover plate structure in a lithium battery cap assembly;

[0019] Figure 5 This is a schematic diagram of the exploded structure of a conductive column in a lithium battery cap assembly.

[0020] In the figure: a cap 100 , teeth 110 , a groove 120 , a bottom plate 122 , a spring 130 , a protective cover 140 , a rubber protective pad 141 , a protective plate 150 , a sleeve 1 200 , a sleeve 2 210 , and a spring 220 . DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] Example 1: Figure 1-3 , including a cap 100, a groove 120 is opened inside the bottom of the cap 100, a silicone pad 121 is fixedly installed on the inner wall of the groove 120, and micropores are evenly opened on the inner wall of the silicone pad 121. A bottom plate 122 is fixedly installed on the inner wall of the bottom of the groove 120, and the bottom plate 122 is electrically connected to the inner wall of the cap 100. The inner walls around the bottom of the cap 100 are fixedly connected to the protective plate 150 through a spring 130, and the protective plate 150 and the bottom plate 122 are fixedly connected through a conductive column.

[0023] The specific usage scenario of this embodiment is as follows: the cap 100 is provided to seal and protect the end of the battery, and the silicone pad 121 is provided to play a role in sound insulation and shock prevention when the gas pressure on the battery pack is too high and an explosion occurs, thereby improving the performance of preventing the battery from exploding. The bottom plate 122 and the cap 100 are provided for use in conjunction, thereby facilitating the hidden installation of the silicone pad 121 inside the cap 100, and the spring 130 is provided to isolate the protective plate 150 from the bottom plate 122, thereby facilitating the formation of a cavity between the cap 100 and the protective plate 150, so that after the airflow inside the battery pack explodes, the airflow can enter the cavity after impacting the surface of the protective plate 150, thereby improving the protection of the battery.

[0024] Example 2: Figure 1 , including a cap 100, a groove 120 is opened inside the bottom of the cap 100, a silicone pad 121 is fixedly installed on the inner wall of the groove 120, and micropores are evenly opened on the inner wall of the silicone pad 121, a bottom plate 122 is fixedly installed on the inner wall of the bottom of the groove 120, the bottom plate 122 is electrically connected to the inner wall of the cap 100, the inner wall around the bottom of the cap 100 is fixedly connected to the protective plate 150 through a spring 130, the protective plate 150 and the bottom plate 122 are fixedly connected through a conductive column, a conductive terminal is fixedly installed at the center of the outer wall of the top of the cap 100, and teeth 110 are evenly fixedly installed around the bottom of the cap 100, and the teeth 110 are used to cooperate with the outer wall of the end of the lithium battery for detachable fixed connection.

[0025] The specific usage scenario of this embodiment is: the teeth 110 are provided to facilitate the fixed connection between the cap 100 and the end of the lithium battery.

[0026] Example 3: Figure 3, including a cap 100, a groove 120 is opened inside the bottom of the cap 100, a silicone pad 121 is fixedly installed on the inner wall of the groove 120, and micropores are evenly opened on the inner wall of the silicone pad 121, a bottom plate 122 is fixedly installed on the inner wall of the bottom of the groove 120, the bottom plate 122 is electrically connected to the inner wall of the cap 100, the inner wall around the bottom of the cap 100 is fixedly connected to the protective plate 150 through a spring 130, the protective plate 150 and the bottom plate 122 are fixedly connected through a conductive column, the material of the cap 100 and the bottom plate 122 is set to metal copper, the surface of the cap 100 and the bottom plate 122 are electroplated with metal zinc, the material of the spring 130 is set to metal copper, the top of the spring 130 is electrically connected to the inner wall around the bottom of the cap 100, and the bottom end of the spring 130 is electrically connected to the top of the protective plate 150.

[0027] The specific usage scenario of this embodiment is: by setting the material of the cap 100 and the base plate 122 to be metallic copper, and galvanizing the surface of the cap 100 and the base plate 122, the conductive effect of the cap 100 and the base plate 122 and the corrosion resistance are effectively improved, and by setting a spring 130 for elastically connecting the base plate 122 and the protective plate 150, and being able to conduct electricity, the power supply stability is improved.

[0028] Example 4: Figure 3 , including a cap 100, a groove 120 is opened inside the bottom of the cap 100, a silicone pad 121 is fixedly installed on the inner wall of the groove 120, micropores are evenly opened on the inner wall of the silicone pad 121, a bottom plate 122 is fixedly installed on the inner wall of the bottom of the groove 120, the bottom plate 122 is electrically connected with the inner wall of the cap 100, the inner wall around the bottom of the cap 100 is fixedly connected to the protective plate 150 through a spring 130, the protective plate 150 and the bottom plate 122 are fixedly connected through a conductive column, the inner wall of the bottom of the cap 100 is fixedly connected to the protective cover 140, the outer wall of the protective cover 140 is fixedly installed with a rubber protective pad 141, the inner wall of the protective plate 150 is evenly opened with ventilation holes, and a PU film is fixedly installed inside the ventilation holes,

[0029] The specific usage scenario of this embodiment is as follows: by fixing the rubber protective pad 141 on the outer wall of the protective cover 140, it is convenient to improve the waterproof and anti-leakage performance when the protective cover 140 is connected to the outer wall of the battery, thereby improving the practicability and safety of the equipment; by opening a vent hole on the inner wall of the protective plate 150 and fixing the PU film inside the vent hole, it is convenient to damage the surface of the PU film under the impact of the explosion when the air flow pressure inside the battery pack is too high and an explosion occurs, so that the air flow can pass through the vent hole into the cavity between the protective plate 1506 and the bottom plate 122, thereby releasing the air flow in the battery pack, and at the same time, it can also keep the surface of the battery pack normal and without damage, thereby improving the safety of lithium battery use.

[0030] Example 5: Figure 3 and Figure 5 , including a cap 100, a groove 120 is opened inside the bottom of the cap 100, a silicone pad 121 is fixedly installed on the inner wall of the groove 120, and micropores are evenly opened on the inner wall of the silicone pad 121, a bottom plate 122 is fixedly installed on the inner wall of the bottom of the groove 120, and the bottom plate 122 is electrically connected to the inner wall of the cap 100, and the inner wall around the bottom of the cap 100 is fixedly connected to the protective plate 150 through a spring 130, and the protective plate 150 and the bottom plate 122 are fixedly connected through a conductive column, and the conductive column includes a sleeve 1 200, and the inner wall of the sleeve 1 200 is slidably connected to the sleeve 2 210, and the spring 220 is fixedly connected between the sleeve 1 200 and the sleeve 2 210, and the sleeve 1 200 and the sleeve 2 210 are used to support and conduct electricity between the protective plate 150 and the bottom plate 122.

[0031] The specific usage scenario of this embodiment is: by setting the sleeve 1 200 and the sleeve 2 210 to cooperate with each other in sliding connection, the spring 220 is installed between the sleeve 1 200 and the sleeve 2 210, so as to facilitate the sleeve 1 200 and the sleeve 2 210 to be able to extend and retract, so that when the protective plate 150 slides inside the protective cover 140, when the airflow causes impact on the surface of the protective plate 150, the stability of the protective plate 150 during movement can still be maintained, and the protective cover 140 has a good limiting function when the protective plate 150 moves.

[0032] The working principle of the utility model is: when in use, a technician in this field fixes the silicone pad in the groove 120 inside the bottom of the cap 100, then fixes the bottom plate 122 on the inner wall of the groove 120, and fixes the rubber protective pad 141 on the outer wall of the protective cover 140, then inserts the protective cover 140 and the rubber protective pad 141 into the inner wall of the cap 100 together, then fixes the protective plate 150 to the bottom plate 122 through the spring 130 and a plurality of conductive columns, and then fixes the cap 100 on the outer wall of the end of the lithium battery through the teeth 110.

[0033] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lithium battery cap assembly, comprising a cap (100), wherein a groove (120) is formed inside the bottom of the cap (100), characterized in that: A silicone pad (121) is fixedly installed on the inner wall of the groove (120), and micropores are evenly opened on the inner wall of the silicone pad (121). A base plate (122) is fixedly installed on the inner wall of the bottom of the groove (120), and the base plate (122) is electrically connected to the inner wall of the cap (100). The inner walls around the bottom of the cap (100) are fixedly connected to the protective plate (150) through a spring (130), and the protective plate (150) and the base plate (122) are fixedly connected through a conductive column.

2. A lithium battery cap assembly according to claim 1, characterized in that: A conductive terminal is fixedly mounted at the center of the top outer wall of the cap (100), and teeth (110) are evenly fixedly mounted around the bottom of the cap (100), the teeth (110) being used to cooperate with the outer wall of the end of the lithium battery for detachable fixed connection.

3. A lithium battery cap assembly according to claim 1, characterized in that: The cover cap (100) and the bottom plate (122) are made of metallic copper, the surfaces of the cover cap (100) and the bottom plate (122) are both electroplated with metallic zinc, and the spring 1 (130) is made of metallic copper.

4. A lithium battery cap assembly according to claim 3, characterized in that: The inner walls around the bottom of the top cap (100) of the spring one (130) are electrically connected, and the bottom end of the spring one (130) is electrically connected to the top of the protective plate (150).

5. A lithium battery cap assembly according to claim 1, characterized in that: The inner wall at the bottom of the cap (100) is fixedly connected to the protective cover (140), the outer wall of the protective cover (140) is fixedly installed with a rubber protective pad (141), and the inner wall of the protective plate (150) is evenly provided with ventilation holes, and a PU film is fixedly installed inside the ventilation holes.

6. A lithium battery cap assembly according to claim 1, characterized in that: The conductive column comprises a sleeve 1 (200), the inner wall of the sleeve 1 (200) is slidably connected to a sleeve 2 (210), a spring 2 (220) is fixedly connected between the sleeve 1 (200) and the sleeve 2 (210), and the sleeve 1 (200) and the sleeve 2 (210) cooperate to support and conduct electricity between the protective plate (150) and the bottom plate (122).

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