Negative electrode end cover of lithium battery

Abstract

The utility model discloses a lithium battery cathode end cover, which relates to the field of batteries, and adopts the technical scheme that the lithium battery cathode end cover comprises an end cover main body, the end cover main body is respectively and fixedly connected with a splicing piece and a connecting piece used for being detachably connected with the splicing piece, and the splicing piece and the connecting piece are symmetrically arranged along the diameter direction of the end cover main body; when a plurality of batteries are not stored in the storage box, the splicing pieces on one end cover main body are spliced with the connecting pieces on the other end cover main bodies, so that the plurality of end cover main bodies can be spliced with one another, and the plurality of batteries can be concentrated and stably placed together; and a plurality of batteries are prevented from being dispersedly placed in different places.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and more specifically, to a negative terminal cover of a lithium battery. Background Art

[0002] A battery refers to a cup, trough or other container or part of the space of a composite container that contains an electrolyte solution and metal electrodes to generate electric current. It is a device that can convert chemical energy into electrical energy and has a positive electrode and a negative electrode.

[0003] A battery is usually composed of a positive terminal cover, a negative terminal cover and a cylinder. The positive terminal cover and the negative terminal cover are respectively welded to the two end surfaces of the cylinder. The negative terminal cover is set relatively flat, usually just a circular sheet. In the prior art, a battery compartment is provided on a tool for using batteries, and a spring for contacting the positive terminal cover and a spring for contacting the negative terminal cover are usually provided in the battery compartment.

[0004] When storing multiple batteries, people usually choose a storage box specially used for placing batteries to store multiple batteries at the same time. However, when there is no storage box to store multiple batteries, people usually scatter the batteries on a desktop or other places, so that the multiple batteries cannot be placed together in a centralized and stable manner.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model aims to provide a negative terminal cover for a lithium battery.

[0007] The above technical purpose of the utility model is achieved through the following technical scheme: a negative terminal cap of a lithium battery, comprising an end cap body, to which a splicing piece and a connecting piece for detachable connection with the splicing piece are fixedly connected, and the splicing piece and the connecting piece are symmetrically arranged along the diameter direction of the end cap body.

[0008] The utility model is further configured as follows: the splicing piece is a threaded rod, and the connecting piece is a threaded tube for threaded connection with the threaded rod.

[0009] The utility model is further configured as follows: a resistance ring is arranged on the end cover body, and a gap for accommodating the threaded pipe is formed between the resistance ring and the end cover body, a plurality of short rods are integrally formed on the resistance ring, and one end of the short rods is bonded to the end cover body.

[0010] The utility model is further configured as follows: a connecting pipe coaxially arranged is integrally formed on the abutment ring, and one end of the connecting pipe is bonded to the end cover body.

[0011] The utility model is further configured as follows: a plane is opened on the outer wall of the threaded tube, the plane and the end cover body are bonded to each other, a rectangular block is bonded to the end face of the threaded rod, and one end face of the rectangular block is bonded to the end cover body.

[0012] The utility model is further configured as follows: the end cover body and the abutment ring are both made of lithium alloy.

[0013] In summary, the utility model has the following beneficial effects: when there is no storage box to store multiple batteries, the splicing pieces on one of the end cover bodies are first spliced ​​with the connecting pieces on the other end cover bodies, so that the splicing between the multiple end cover bodies can be completed, so that the multiple batteries can be concentrated and stably placed together, avoiding the multiple batteries being scattered in different places. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a partial exploded view of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the end cover body in the utility model;

[0016] Figure 3 It is a schematic diagram of the structure on the interference ring in the utility model.

[0017] In the figure: 1. end cover body; 2. threaded rod; 3. threaded pipe; 4. abutment ring; 5. short rod; 6. connecting pipe; 7. rectangular block. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0019] Lithium battery negative terminal cap, such as Figures 1 to 3As shown, it includes an end cap body 1, on which a splicing piece and a connecting piece for detachably connecting with the splicing piece are respectively fixedly connected, the splicing piece and the connecting piece are symmetrically arranged along the diameter direction of the end cap body 1, the splicing piece is a threaded rod 2, and the connecting piece is a threaded tube 3 for threaded connection with the threaded rod 2, a plane is provided on the outer wall of the threaded tube 3, the plane and the end cap body 1 are bonded to each other, a rectangular block 7 is bonded to the end surface of the threaded rod 2, and one end surface of the rectangular block 7 is bonded to the end cap body 1. When there is no storage box to store multiple batteries, the threaded rod 2 on one of the end cap bodies 1 is first threadedly connected to the threaded tube 3 on the other end cap bodies 1, which can increase the stability when two adjacent end cap bodies 1 are spliced, thereby completing the connection between multiple end cap bodies 1. They are spliced ​​together so that multiple batteries can be placed together in a concentrated and stable manner, avoiding multiple batteries being placed in different places, and the threaded tube 3 and the threaded rod 2 do not affect the normal use of the end cover body 1 placed in the battery compartment. When the spliced ​​multiple batteries need to be used, by rotating one of the batteries, the threaded rod 2 on the end cover body 1 of the battery gradually disengages from the threaded tube 3 on the end cover body 1 of other batteries, so that the battery can be disassembled for use, and the flat part on the threaded tube 3 is bonded to the end cover body 1, so that the threaded tube 3 can be conveniently installed on the end cover body 1, and is bonded to the end cover body 1 through the rectangular block 7 on the threaded rod 2. Because the outer surface of the rectangular block 7 is flat, it is convenient to fix the rectangular block 7 and the threaded rod 2 on the end cover body 1.

[0020] like Figures 1 to 3As shown, a resistance ring 4 is provided on the end cover body 1, and a gap for accommodating the threaded tube 3 is formed between the resistance ring 4 and the end cover body 1, two short rods 5 are integrally formed on the resistance ring 4, one end of the short rod 5 is bonded to the end cover body 1, and a coaxially arranged connecting tube 6 is integrally formed on the resistance ring 4, one end of the connecting tube 6 is bonded to the end cover body 1, the end cover body 1 and the resistance ring 4 are both made of lithium alloy material, after the splicing of multiple batteries is completed by threading the threaded rod 2 in the threaded tube 3, the multiple batteries in the spliced ​​state need to be stored, if the cylindrical parts of multiple batteries are in contact with the desktop at the same time, the multiple batteries are in a horizontally placed state, which will occupy more area of ​​the desktop, and the multiple batteries can be placed through It is placed vertically so that the abutment ring 4 fits against the desktop, and the battery can be supported by the short rod 5. When the battery is placed in the battery compartment for use, the spring in the battery compartment can first pass through the inside of the abutment ring 4 and then through the connecting tube 6 until the end of the spring abuts against the end cover body 1. At this time, parts of the spring are respectively accommodated in the abutment ring 4 and the connecting tube 6, which can reduce the sliding of the spring on the end cover body 1 when the spring abuts against the end cover body 1, thereby reducing the scratches caused by the spring to the end cover body 1 when the spring abuts against the end cover body 1. The lithium alloy material has good wear resistance, which can reduce the wear caused by the spring to the end cover body 1 when the spring in the battery compartment abuts against the end cover body 1, and can improve the wear resistance of the end cover body 1 and the abutment ring 4.

[0021] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A negative terminal cap of a lithium battery, comprising an end cap body (1), characterized in that: The end cap body (1) is respectively fixedly connected with a splicing piece and a connecting piece for detachably connecting with the splicing piece, the splicing piece and the connecting piece are symmetrically arranged along the diameter direction of the end cap body (1), the splicing piece is a threaded rod (2), the connecting piece is a threaded tube (3) for threaded connection with the threaded rod (2), the end cap body (1) is provided with a resistance ring (4), and a gap for accommodating the threaded tube (3) is formed between the resistance ring (4) and the end cap body (1), and a plurality of short rods (5) are integrally formed on the resistance ring (4), and one end of the short rods (5) is bonded to the end cap body (1); The abutment ring (4) is integrally formed with a coaxially arranged connection pipe (6), one end of which is bonded to the end cover body (1), a plane is provided on the outer wall of the threaded tube (3), the plane and the end cover body (1) are bonded to each other, a rectangular block (7) is bonded to the end surface of the threaded rod (2), one end surface of the rectangular block (7) is bonded to the end cover body (1), and the end cover body (1) and the abutment ring (4) are both made of lithium alloy.

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