CN204375813U - Cylindrical lithium ion battery exempts from spot welding battery case - Google Patents

Abstract

A kind of cylindrical lithium ion battery exempts from spot welding battery case, comprise battery container, battery core putting hole and baffle holddown groove is designed with in battery container, baffle is plugged with in baffle holddown groove, battery container is provided with direct current charge-discharge socket, battery container upper end has been bolted to connection upper cover, battery container lower end has been bolted to connection lower cover, upper cover and under cover with plug, plug and direct current charge-discharge socket plug, also spring groove is had in upper cover and lower cover, spring groove internal fixtion is connected with spring, the other end of spring is connected with shaping nickel sheet, shaping nickel sheet is placed in battery container.

Description

Cylindrical lithium-ion battery without spot welding battery case

technical field

The utility model relates to a cylindrical lithium-ion battery shell, in particular to a spot-welding-free battery shell for a cylindrical lithium-ion battery.

Background technique

With the wide application of lithium-ion battery packs and the trend of replacing lead-acid batteries in an all-round way, the demand for lithium-ion battery packs is increasing within a certain period of time, but the spot welding in the traditional cylindrical lithium-ion battery pack assembly process is troublesome, Unstable equipment and operational differences affect product consistency, and a series of safety issues such as insulation and shock absorption must be considered in the later packaging. Therefore, it is very necessary to develop a battery case free of spot welding, easy to assemble, and convenient for mass production.

Contents of the invention

The purpose of the utility model is to provide a spot-welding-free battery case for a cylindrical lithium-ion battery, which can simplify the processes such as spot welding in the battery pack process, and reduce equipment instability, operational differences, and assembly troubles faced during the assembly process of the cylindrical lithium-ion battery. A range of issues affecting product consistency.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a spot-welding-free battery shell for a cylindrical lithium-ion battery, including a battery shell, which is characterized in that: a cell placement hole and a protective plate fixing groove are designed in the battery shell, A protective plate is inserted into the protective plate fixing groove, and a DC charging and discharging socket is installed on the battery case. There is a plug on the cover, and the plug is plugged into the DC charging and discharging socket. There are also spring slots in the upper cover and the lower cover, and a spring is fixedly connected in the spring slot. The other end of the spring is connected with a formed nickel sheet, and the formed nickel sheet is placed inside the battery case.

In this structure, wire slots are provided on the inner surfaces of the upper cover and the lower cover.

In this structure, the battery casing, the upper cover and the lower cover are coated with a flame retardant layer.

In this structure, the flame retardant layer is an ABS material layer.

The advantages and effects of the utility model are: due to the structure of the utility model, the electric core in the battery shell is free of spot welding, the position of the wiring harness is fixed, the lithium battery protection plate and the electric core are placed separately, and no other insulation and shock absorption are required after the assembly is completed Packaging, the utility model simplifies the spot welding and other processes in the battery pack process, and reduces a series of problems that affect product consistency, such as equipment instability, operational differences, and assembly troubles, in the assembly process of cylindrical lithium-ion batteries. The safety factor of the battery pack is improved, and the use effect is good.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the assembly explosion diagram of the utility model;

Fig. 3 is a top view of the utility model with the loam cake removed;

Fig. 4 is the bottom view of the utility model with the lower cover removed;

Fig. 5 is a perspective view of the battery case in the utility model;

Fig. 6 is the structural representation of upper cover in the utility model;

Fig. 7 is a schematic structural view of the lower cover in the present invention.

In the attached drawings: 1. DC charging and discharging socket; 2. Upper cover; 3. Lower cover; 4. Battery case; , Formed nickel sheet; 10, Spring groove; 11, Wire groove.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

As shown in Figures 1, 2, 3, 4, 5, 6, and 7, the utility model is a spot-welding-free battery case for a cylindrical lithium-ion battery, including a battery case 4, and is characterized in that: the battery case 4 is designed with The cell placement hole 6 and the protective plate fixing slot 5, the protective plate is inserted into the protective plate fixing slot 5, the DC charging and discharging socket 1 is installed on the battery case 4, and the upper end of the battery case 4 is fixedly connected with the upper cover by bolts 7 2. The lower end of the battery case 4 is fixedly connected with the lower cover 3 through the bolt 7, and the upper cover 2 and the lower cover 3 have plugs, and the plugs are plugged into the DC charging and discharging socket 1, and the upper cover 2 and the lower cover 3 are also opened. There is a spring groove 10, and a spring 8 is fixedly connected in the spring groove 10, and the other end of the spring 8 is connected with a formed nickel sheet 9, and the formed nickel sheet 9 is placed in the battery case 4. In this embodiment, wire slots 11 are formed on the inner surfaces of the upper cover 2 and the lower cover 3 . In this embodiment, the battery case 4 , the upper cover 2 and the lower cover 3 are coated with a flame retardant layer. In this embodiment, the flame retardant layer is an ABS material layer.

In this way, after the assembly is completed, the insulation and shock absorption of the battery pack are reduced, and the overall safety of the battery pack is greatly increased.

The utility model prevents the protective plate from contacting with the electric core, and each electric core does not touch, which increases the safety of the battery pack.

The utility model can utilize the upper cover, the lower cover and the formed nickel sheet to realize the series-parallel connection of the battery, and avoid spot welding, which simplifies the assembly process of the cylindrical lithium ion battery.

When the utility model is used, the wire can be welded to the formed nickel sheet and the wire can be plugged into it, which not only reduces the space occupancy of the wire, but also the other end of the wire is installed on the plug of the upper cover and the lower cover, and the upper cover and the lower cover are installed at the same time. The plugs on the cover and the lower cover only need to be docked with the sockets on the battery case, which simplifies the assembly process and reduces safety hazards caused by wires.

Put the screened cylindrical lithium-ion battery into the battery case, weld the charging and discharging wires of the lithium battery protection board and the tributary charging and discharging socket, and install them in the fixing slot of the protection board. According to the series and parallel requirements of the battery pack, take the corresponding The length of the power line and the cable, weld the line to the formed nickel sheet of the lower cover in order, weld the cable and B+/B- line to the corresponding plug on the upper cover and the lower cover, and then fix the power line and the cable Insert the plugs on the upper cover and the lower cover into the upper and lower sockets on the lithium battery protection board respectively as required.

The above-mentioned embodiment is only to describe the preferred implementation of the present utility model, not to limit the design and protection scope of the present utility model. Various modifications and improvements made in the technical solution of the utility model shall fall within the scope of protection of the utility model.

Claims (4)

1. a cylindrical lithium ion battery exempts from spot welding battery case, comprise battery container (4), it is characterized in that: in battery container (4), be designed with battery core putting hole (6) and baffle holddown groove (5), baffle holddown groove is plugged with baffle in (5), battery container (4) is provided with direct current charge-discharge socket (1), battery container (4) upper end is fixedly connected with upper cover (2) by bolt (7), battery container (4) lower end is fixedly connected with lower cover (3) by bolt (7), with plug on upper cover (2) and lower cover (3), plug and direct current charge-discharge socket (1) plug, spring groove (10) is also had in upper cover (2) and lower cover (3), spring groove (10) internal fixtion is connected with spring (8), the other end of spring (8) is connected with shaping nickel sheet (9), shaping nickel sheet (9) is placed in battery container (4).

2. a kind of cylindrical lithium ion battery according to claim 1 exempts from spot welding battery case, it is characterized in that: the inner surface of described upper cover (2) and lower cover (3) has metallic channel (11).

3. a kind of cylindrical lithium ion battery according to claim 2 exempts from spot welding battery case, it is characterized in that: scribble flame-retardant layer outside described battery container (4), upper cover (2) and lower cover (3).

4. a kind of cylindrical lithium ion battery according to claim 3 exempts from spot welding battery case, it is characterized in that: described flame-retardant layer is ABS material layer.