CN207705270U - A kind of lithium ion battery pack outer case - Google Patents

Abstract

The utility model is related to a kind of lithium ion battery pack outer cases.The utility model belongs to technical field of lithium ion.A kind of lithium ion battery pack outer case, its main feature is that：Lithium ion battery pack outer case includes upper cover and lower cover, and upper cover and lower cover are in structure as pattern；Battery case shape is in I-shaped, it is divided into enlarged head, waisting portion, small head, it is fluted in enlarged head end, there is outlet hole in groove, each corner of shell uses designed arc-shaped appearance, outer casing frontispiece has screw hole, screw hole to be located at four corner locations of shell and enlarged head and waisting portion binding site position.The utility model have many advantages, such as of simple structure and low cost, easily operated, reliable in quality not cracky, be easily installed and dismantle.

Description

Lithium-ion battery case

technical field

The utility model belongs to the technical field of lithium ion batteries, in particular to a casing of a lithium ion battery pack.

Background technique

At present, with the continuous development of lithium-ion battery technology, the application of lithium-ion battery packs in daily life is becoming more and more popular. Especially in the field of electric bicycles, light weight, large capacity, and long life have become the first choice for the public to travel conveniently.

In the field of lithium-ion battery packs for electric bicycles, common lithium-ion battery packs are processed by combining several battery cells in series and parallel, and then wrapped with PVC thermoplastic film to achieve waterproof insulation. However, in actual use, one is to pack lithium-ion batteries wrapped in PVC thermoplastic film into plastic or metal casings; the other is to add epoxy resin boards between PVC and battery packs as protective layers. Install directly into the battery compartment of the electric vehicle. Because the PVC thermoplastic film is relatively thin, it is easily damaged during use, resulting in the loss of insulation and waterproof functions, and the process of adding fillers such as epoxy resin boards and other protective layers is relatively complicated and labor costs are too high. In addition, the above two methods need to be fixed with a large amount of filler and structural glue during installation, which increases the difficulty of installation and disassembly. Therefore, there is an urgent need to develop a lithium-ion battery case with low cost, beautiful appearance, and easy production and operation, which has solved the above problems.

Contents of the invention

The utility model provides a lithium-ion battery pack casing for solving the technical problems existing in the known technology.

The purpose of the utility model is to provide a lithium-ion battery case with the characteristics of simple structure, low cost, easy operation, reliable quality, unbreakable, easy installation and disassembly.

A lithium-ion battery pack casing, including an upper cover and a lower cover, and the upper cover and the lower cover are exactly the same in structure and composition;

Among them, the shape of the battery case is I-shaped, which is divided into a big head, a narrow waist, and a small head. There is a groove at the end of the big head, and there are outlet holes in the groove. Each corner of the casing is designed with a circular arc. There are six screw holes on the front of the shell, and the screw holes are located at the four corners of the shell and the junction of the big head and the waist.

The technical scheme adopted by the utility model lithium-ion battery pack shell is:

A lithium-ion battery pack casing, which is characterized in that: the lithium-ion battery pack casing includes an upper cover and a lower cover, the upper cover and the lower cover are the same in structure and appearance; There is a groove at the end of the big head and a small head. There are outlet holes in the groove. Each corner of the shell is designed with a circular arc. There are screw holes on the front of the shell, and the screw holes are located at the four corners of the shell. And the position of the combination point of the big head and the waist.

The utility model lithium-ion battery pack casing can also adopt the following technical scheme:

The lithium-ion battery pack case is characterized in that the contact edges of the upper cover and the lower cover are designed with grooves and protrusions. When the upper and lower covers are combined, the grooves and protrusions of the upper cover correspond to the protrusions and recesses of the lower cover. groove.

The lithium-ion battery case is characterized in that: the outlet hole is located in the groove of the big head, and the opening runs through the contact edge of the upper cover and the lower cover.

The lithium-ion battery pack case is characterized in that: there are label sticking positions on the surface of the upper cover and the lower cover, which are convenient for sticking LOGO and precautions.

The advantages and positive effects that the utility model has are:

Due to the adoption of the brand-new technical scheme of the utility model, the lithium-ion battery pack casing has obvious features compared with the prior art: first, the utility model is a lithium-ion battery pack casing, and the upper cover and the lower cover adopt the same mold Made of injection molding, which greatly saves cost investment; the I-shaped design makes it easy to hold the battery pack in the process of loading and unloading the battery compartment, making the operation process simple; big head and small head, the inner cavity of the big head The large space is conducive to the installation of the lithium-ion battery pack BMS, and improves the heat dissipation efficiency of the BMS during work; the design of the large head and small head is conducive to the fixing of the battery pack in the battery compartment, and the outer shell is made of ABS plastic injection molding. Molded, with strong toughness, strength and insulation, which protects the battery pack to a large extent; the outlet hole of the battery case is located in the groove of the big head, so that the wire will not be caught by the wall of the battery compartment and the battery case during use Squeeze, thereby protecting the wires and reducing potential safety hazards; the corners of the shell are designed with arcs, so that the shell can be in good contact with the battery compartment wall, avoiding the puncture damage of the battery shell by the burr at the corners of the battery compartment, and prolonging the battery life. Service life; grooves and protrusions are used on the contact side of the upper cover and the lower cover. When the upper and lower covers are combined, the grooves and protrusions of the upper cover correspond to the protrusions and grooves of the lower cover, making the combination of the upper and lower covers stronger. It avoids the misalignment of the upper and lower covers, and protects the gaps of the shell from being inserted by external objects, further protecting the safety of the battery pack; the surface of the upper and lower covers is designed with a label sticker, which is convenient for sticking the company LOGO and precautions.

Description of drawings

Fig. 1 is a finished perspective view of the lithium-ion battery pack casing of the present invention.

Fig. 2 is a perspective view of the appearance of the lithium-ion battery pack casing of the present invention.

Fig. 3 is a three-dimensional view and a partially enlarged view of the inner cavity of the lithium-ion battery pack casing of the present invention.

In the figure, 1. upper cover, 2. lower cover, 101. label sticking position, 102. outer screw hole, 103. corner arc, 104. narrow waist, 105. big head, 106. small head, 107 . Big head groove, 108. Outlet hole, 109. Edge groove, 110. Edge protrusion, 111. Fastening hole, 112. Free hole.

Detailed ways

In order to further understand the utility model content, characteristics and effects of the present utility model, the following examples are given hereby, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Example 1

A lithium-ion battery case, including an upper cover and a lower cover, the upper cover and the lower cover are the same in structure and shape; There is a groove at the end of the head, and there is an outlet hole in the groove. Each corner of the shell is designed with a circular arc. There are screw holes on the front of the shell. The screw holes are located at the four corners of the shell and the junction of the big head and the waist. Location. Brand stickers are designed on the surface of the upper cover and the lower cover, which is convenient for pasting the company LOGO and precautions.

The concrete structure of this embodiment:

Refer to attached drawing 1. The structure of the lithium-ion battery casing is composed of two parts, the upper cover 1 and the lower cover 2, and the upper cover 1 and the lower cover 2 are exactly the same in structure combination and appearance, and they are all injection molded by the same mold. Take the above cover 1 as an example to describe in detail below. On the outer surface of the upper cover 1, there are trademark sticking positions 101, external screw holes 102, and outlet holes 108 are located in the groove of the big head 105, and the opening runs through the upper cover 1 and contacts the lower cover 2. The external screw holes 102 are respectively located at the four corners of the upper cover and the connecting part between the big head 105 and the waist 104, the edge grooves 109 and the edge protrusions 110 are respectively located on both sides of the edge of the upper cover 1, and are symmetrically distributed for fastening. The hole 111 and the free hole 112 are respectively located in the inner cavity of the upper cover 1, and the distribution is the same as that of the external screw hole 102, and the distribution is symmetrical; the free hole 112 allows the screw thread part to pass freely, but the screw cap cannot, and the fastening hole 111 is used for Tighten the threaded part of the screw, merge the upper cover 1 and the lower cover 2 symmetrically, so that the edge grooves and edge protrusions of the upper cover 1 and the lower cover 2 are embedded in each other, and then fasten them into the fastening holes through the free holes with screws. Can.

This embodiment has the positive effects of simple structure, low cost, easy operation, reliable quality, unbreakable, easy installation and disassembly.

Claims (4)

1. A lithium-ion battery pack casing is characterized in that: the lithium-ion battery pack casing includes a loam cake and a lower cover, and the loam cake and the lower lid are the same in structure and appearance; There is a groove at the end of the big head, and there is an outlet hole in the groove. Each corner of the shell is designed with a circular arc. There are screw holes on the front of the shell, and the screw holes are located on the four sides of the shell. Angle position and the joint position of the big head and the waist. 2. The lithium-ion battery pack case according to claim 1, wherein the contact edges of the upper cover and the lower cover are designed with grooves and protrusions, and when the upper and lower covers are combined, the grooves and protrusions of the upper cover correspond to each other. Protrusions and grooves on the lower cover. 3. The case of the lithium-ion battery pack according to claim 1, wherein the outlet hole is located in the groove of the big head, and the opening runs through the contact edge of the upper cover and the lower cover. 4. The case of the lithium-ion battery pack according to claim 1, characterized in that: there are label sticking positions on the surface of the upper cover and the lower cover, which are convenient for sticking LOGO and precautions.