Novel lithium battery cap connecting piece structure

Abstract

The utility model discloses a novel lithium battery cap connecting piece structure, and relates to the technical field of lithium battery assemblies. The device comprises an inner fixing disc, an outer limiting ring, an abutting disc and an outer fixing disc, an insulating ring is fixed to the peripheral side of the inner fixing disc, a flexible ring is fixed to the peripheral side of the insulating ring, the outer fixing disc is fixed to the peripheral side of the flexible ring, an outer limiting ring is fixed to the peripheral side of the outer fixing disc, and the abutting disc is arranged above the top end of the inner fixing disc. The diameter of the abutting disc is smaller than that of the inner fixing disc, and a rubber ring is fixed to the top end of the outer fixing disc. Through the arrangement of the inner fixing disc, the outer limiting ring, the abutting disc and the outer fixing disc, the problems that a lithium battery cap connecting piece and a battery internal power connection structure are likely to cause broken contact due to stress after working for a long time, and short circuit is likely to be caused by contact of a positive electrode and a negative electrode in the battery are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery components, and particularly relates to a novel lithium battery cap connecting piece structure. Background Art

[0002] The lithium battery cap connector is an important part of the lithium battery cap. It is usually located inside the cap and plays the role of connecting the internal circuit of the battery and the external circuit. The design and manufacturing quality of the connector directly affect the performance and safety of the lithium battery. Through some structures, such as sealing rings, large aluminum sheets, PTC protection sheets, upper covers, etc., these components together with the connector constitute the overall structure of the lithium battery cap, which jointly ensures the safety performance and stability of the lithium battery. However, it still has the following disadvantages in actual use:

[0003] 1. When the lithium battery cap connector is in use, the structure on it needs to be connected to the conductive electrode structure inside the battery. However, during the connection process, the conductive electrode and the structure on the cap are directly in contact with each other for conduction. When the stress in the battery changes after working for a long time, it is easy to cause battery failure and affect the durability of the battery.

[0004] 2. When the connecting piece is in use, it is necessary to connect the power connection structure with the internal structure. It is easy for the internal structure of the battery to contact with different structures, and after contact, it will cause a short circuit between the positive and negative electrodes, affecting the safe use of the battery. Utility Model Content

[0005] The purpose of the utility model is to provide a novel lithium battery cap connecting piece structure, which solves the problem that the lithium battery cap connecting piece and the internal power connection structure of the battery are easily disconnected due to stress after long-term work, and the problem that short circuit is easily caused by contact between the positive and negative electrodes inside the battery is solved by arranging an inner fixing plate, an outer limiting ring, abutting plate and an outer fixing plate.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] The utility model discloses a novel lithium battery cap connecting piece structure, comprising an inner fixing disk, an outer limiting ring, an abutting disk and an outer fixing disk, an insulating ring is fixed on the circumferential side of the inner fixing disk, a flexible ring is fixed on the circumferential side of the insulating ring, an outer fixing disk is fixed on the circumferential side of the flexible ring, an outer limiting ring is fixed on the circumferential side of the outer fixing disk, an abutting disk is arranged above the top end of the inner fixing disk, the diameter of the abutting disk is smaller than the diameter of the inner fixing disk, a rubber ring is fixed on the top end of the outer fixing disk, when working, the negative pole of the battery is connected to electricity through the inner fixing disk, the outer limiting ring is abutted against the steel shell of the battery, so that the outer fixing disk is connected to electricity to the positive pole of the battery, after the top end of the abutting disk abuts against the negative pole structure in the steel shell of the battery, the negative pole of the inner fixing disk is connected to electricity, and the positive pole of the battery is connected to electricity through the outer fixing disk.

[0008] Furthermore, the top and bottom ends of the flexible ring are both arranged in a wave shape, and the top and bottom ends of the insulating ring are both flush with the two end surfaces of the inner fixed disk. When the flexible ring is working, the wave shape is arranged to increase the flexibility of use.

[0009] Furthermore, the outer limiting ring includes a fixed ring, an elastic ring and a power connection ring. The elastic ring is fixed on the circumferential side of the fixed ring, and the power connection ring is fixed on the circumferential side of the elastic ring. The outer limiting ring is connected to the elastic ring through the fixed ring, and the elastic ring cooperates with the power connection ring to abut against the inside of the battery steel shell to connect the positive electrode of the battery.

[0010] Furthermore, the fixing ring is fixed on the peripheral side of the outer fixing disk, the flexible ring is convexly arranged, and the power connection ring is fixed on the convex surface of the flexible ring, so that the power connection ring can be well abutted against the inner wall of the steel shell.

[0011] Furthermore, an upper connecting ring is fixed at the center of the bottom end of the abutment disk, an annular spring is fixed on the circumferential side of the upper connecting ring, a lower connecting ring is fixed to the lower part of the inner wall of the annular spring, and the lower connecting ring is fixed to the top of the inner fixed disk. The abutment disk provides elasticity through the annular spring to cooperate with the top end for electrical connection.

[0012] Furthermore, the inner diameter of the rubber ring is equal to the inner diameter of the outer fixed disk, the outer diameter of the rubber ring is equal to the outer diameter of the outer fixed disk, and a cavity is opened inside the rubber ring. When the rubber ring is working, the cavity is opened inside to increase elasticity and increase insulation strength between the rubber ring and the inner fixed disk.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model solves the problem that the lithium battery cap connecting piece and the internal power connection structure of the battery are easily disconnected due to stress after working for a long time by arranging an inner fixing disk, an outer limiting ring, an abutting disk and an outer fixing disk. When the lithium battery cap connecting piece needs to be installed, the outer fixing disk is placed in the battery cap and extended into the steel shell until the outer fixing disk abuts against the end of the steel shell, and then other structures in the battery can be installed. When the internal structure of the battery is installed, the elastic ring on the circumferential side of the fixing ring cooperates with the power connection ring, and the power connection ring abuts on the steel shell of the battery, and the positive electrode is connected to the power through the outer fixing disk, and the abutting disk abuts on the negative electrode structure in the battery, and through the elastic action of the annular spring sheet, the abutting disk is always in contact with the negative electrode structure in the battery to connect the negative electrode. During the operation, the internal and external power connection of the battery can be well guaranteed, which reduces the problem of disconnection caused by stress between the lithium battery cap connecting piece and the internal power connection structure of the battery after working for a long time, and the stability of power connection is better.

[0015] 2. The utility model solves the problem that the lithium battery cap connecting piece is prone to short circuit inside the battery due to contact between the positive and negative electrodes by arranging an inner fixing disk and an outer fixing disk. When the inner fixing disk and the outer fixing disk are installed, the inner fixing disk and the outer fixing disk are insulated by the cooperation of the insulating ring and the flexible ring. The flexible ring allows the position between the inner fixing disk and the outer fixing disk to be maintained stable through elasticity during operation. The cavity opened inside the rubber ring increases the insulation between the inner fixing disk and the outer fixing disk, thereby reducing the possibility of short circuit caused by short circuit between the positive and negative electrodes caused by the internal structure of the battery, and improving the safety of battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.

[0017] Figure 1 This is a three-dimensional diagram of the assembly structure of a new type of lithium battery cap connecting piece structure;

[0018] Figure 2 It is a three-dimensional diagram of the internal fixing plate structure;

[0019] Figure 3 is a stereogram of the outer confinement ring structure;

[0020] Figure 4 for Figure 3 A magnified view of the structure at A;

[0021] Figure 5 It is a three-dimensional diagram of the abutment plate structure;

[0022] Figure 6 It is a three-dimensional diagram of the external fixed plate structure.

[0023] Reference numerals:

[0024] 1. Inner fixed disk; 101. Insulating ring; 102. Flexible ring; 2. Outer limiting ring; 201. Fixed ring; 202. Elastic ring; 203. Electrical connection ring; 3. Abutment disk; 301. Upper connecting ring; 302. Annular spring; 303. Lower connecting ring; 4. Outer fixed disk; 401. Rubber ring; 402. Cavity. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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. Specific embodiment 1

[0027] See also Figure 1-6 The utility model is a novel lithium battery cap connection piece structure, comprising an inner fixed disk 1, an outer limiting ring 2, an abutting disk 3 and an outer fixed disk 4. An insulating ring 101 is fixed to the circumference of the inner fixed disk 1. When the inner fixed disk 1 is working, the negative pole of the battery is connected to the electricity, and the flexible ring 102 is connected to the circumference of the insulating ring 101. The flexible ring 102 is fixed to the circumference of the insulating ring 101. The inner fixed disk 1 and the outer fixed disk 4 are insulated by the insulating ring 101 and the flexible ring 102. The outer fixed disk 4 is fixed to the circumference of the flexible ring 102. The disk 4 performs external power connection operations. An outer limiting ring 2 is fixed on the circumferential side of the outer fixed disk 4. The outer limiting ring 2 is limited to abut against the installed battery steel shell to connect the positive pole. An abutment disk 3 is arranged above the top of the inner fixed disk 1. The diameter of the abutment disk 3 is smaller than the diameter of the inner fixed disk 1. The abutment disk 3 contacts the negative pole in the battery, so that the inner fixed disk 1 is connected to the negative pole. A rubber ring 401 is fixed on the top of the outer fixed disk 4. The rubber ring 401 is further cooperated with the flexible ring 102 to insulate the inner fixed disk 1 and the outer fixed disk 4.

[0028] Specifically, the top and bottom ends of the flexible ring 102 are both arranged in a wave shape, and the top and bottom ends of the insulating ring 101 are both flush with the two end surfaces of the inner fixed disk 1. When the flexible ring 102 is working, the wave shape is arranged so that the inner fixed disk 1 can be well set in the outer fixed disk 4.

[0029] Furthermore, the outer limiting ring 2 includes a fixed ring 201, an elastic ring 202 and a power connecting ring 203. The elastic ring 202 is fixed on the circumferential side of the fixed ring 201, and the power connecting ring 203 is fixed on the circumferential side of the elastic ring 202. When the outer limiting ring 2 is working, the elastic ring 202 and the power connecting ring 203 cooperate to be movably connected to the inner wall of the lithium battery steel shell. The elastic action of the elastic ring 202 makes the power connecting ring 203 and the lithium battery steel shell squeezed tightly.

[0030] Furthermore, the fixing ring 201 is fixed on the peripheral side of the outer fixing disk 4, the flexible ring 102 is arranged in a raised manner, and the power-connecting ring 203 is fixed on the raised surface of the flexible ring 102, and is connected to the outer fixing disk 4 through the fixing ring 201. When the fixing ring 201 is working, it is fixed on the outer fixing disk 4, and cooperates to connect the elastic ring 202 and the power-connecting ring 203 to the outer fixing disk 4.

[0031] Furthermore, an upper connecting ring 301 is fixed at the center of the bottom end of the abutment disk 3, an annular spring 302 is fixed on the circumferential side of the upper connecting ring 301, a lower connecting ring 303 is fixed to the lower part of the inner wall of the annular spring 302, and the lower connecting ring 303 is fixed to the top of the inner fixed disk 1. When the abutment disk 3 is working, the annular spring 302 is connected through the upper connecting ring 301, and is fixed to the inner fixed disk 1 through the lower connecting ring 303 at the bottom end of the annular spring 302.

[0032] The operation process of this embodiment is as follows: during operation, when it is necessary to install the lithium battery cap connector, place the external fixing disk 4 into the battery cap and extend it into the steel shell until the external fixing disk 4 abuts against the end of the steel shell, then other structures in the battery can be installed. After the internal structure of the battery is installed, the elastic ring 202 on the side of the fixing ring 201 cooperates with the power connection ring 203, and the power connection ring 203 abuts against the battery steel shell, and the positive pole is connected to the power through the external fixing disk 4, and the abutment disk 3 abuts against the negative pole structure in the battery, and through the elastic action of the annular spring sheet 302, the abutment disk 3 is always in contact with the negative pole structure in the battery to connect the negative pole. During operation, the internal and external power connection of the battery can be well guaranteed. Specific embodiment 2

[0034] See also Figure 1 , 2 6. Based on the specific embodiment 1, the inner diameter of the rubber ring 401 is equal to the inner diameter of the outer fixed disk 4, the outer diameter of the rubber ring 401 is equal to the outer diameter of the outer fixed disk 4, and a cavity 402 is opened inside the rubber ring 401. When the rubber ring 401 is working, the volume is increased by the cavity 402 opened inside, so that the insulation between the inner fixed disk 1 and the outer fixed disk 4 is increased during the working process.

[0035] The operation process of this embodiment is as follows: during operation, after the inner fixing disk 1 and the outer fixing disk 4 are installed, the inner fixing disk 1 and the outer fixing disk 4 are insulated by the cooperation of the insulating ring 101 and the flexible ring 102, and the position between the inner fixing disk 1 and the outer fixing disk 4 is maintained stable by elasticity through the flexible ring 102 during operation, and the insulation between the inner fixing disk 1 and the outer fixing disk 4 is increased through the cavity 402 opened inside the rubber ring 401.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A novel lithium battery cap connecting piece structure, comprising an inner fixing plate (1), an outer limiting ring (2), an abutting plate (3) and an outer fixing plate (4), characterized in that: An insulating ring (101) is fixed on the circumferential side of the inner fixed disk (1), a flexible ring (102) is fixed on the circumferential side of the insulating ring (101), an outer fixed disk (4) is fixed on the circumferential side of the flexible ring (102), an outer limiting ring (2) is fixed on the circumferential side of the outer fixed disk (4), an abutment disk (3) is arranged above the top end of the inner fixed disk (1), the diameter of the abutment disk (3) is smaller than the diameter of the inner fixed disk (1), and a rubber ring (401) is fixed on the top end of the outer fixed disk (4).

2. A novel lithium battery cap connecting piece structure according to claim 1, characterized in that: The top and bottom ends of the flexible ring (102) are both arranged in a wave shape, and the top and bottom ends of the insulating ring (101) are both flush with the two end surfaces of the inner fixing plate (1).

3. A novel lithium battery cap connecting piece structure according to claim 1, characterized in that: The outer limiting ring (2) comprises a fixed ring (201), an elastic ring (202) and an electric connection ring (203); the elastic ring (202) is fixed on the circumference of the fixed ring (201), and the electric connection ring (203) is fixed on the circumference of the elastic ring (202).

4. A novel lithium battery cap connecting piece structure according to claim 3, characterized in that: The fixing ring (201) is fixed on the peripheral side of the outer fixing disk (4), the flexible ring (102) is arranged in a convex manner, and the power connection ring (203) is fixed on the convex surface of the flexible ring (102).

5. The novel lithium battery cap connecting piece structure according to claim 1 is characterized in that: An upper connecting ring (301) is fixed at the center of the bottom end of the abutting disk (3), an annular spring sheet (302) is fixed on the circumference of the upper connecting ring (301), a lower connecting ring (303) is fixed at the lower part of the inner wall of the annular spring sheet (302), and the lower connecting ring (303) is fixed to the top end of the inner fixing disk (1).

6. The novel lithium battery cap connecting piece structure according to claim 1 is characterized in that: The inner diameter of the rubber ring (401) is equal to the inner diameter of the outer fixing disk (4), the outer diameter of the rubber ring (401) is equal to the outer diameter of the outer fixing disk (4), and a cavity (402) is provided inside the rubber ring (401).

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