CN212136478U - Tank body of battery tank sealed by rolling - Google Patents

Abstract

The utility model provides a jar body of roll-up sealed battery jar, jar body are that one end or both ends open-ended are cylindric, and jar external wall is the smooth face of cylinder, and jar internal wall is middle sunken surface of revolution, and inner wall and outer wall constitute thin wall section and the thick wall section of jar body, and the thick wall section is located jar body open end, and the thin wall section is located jar body middle or middle and blind end, and thick wall section necking down and turn-ups are handled and are used for the roll-up, and the roll-up sealed battery jar can bear more in quantity under the condition of battery package with space weight, the utility model has the advantages of light in weight, intensity are reliable, save material and the battery.

Description

Tank body of battery tank sealed by rolling

Technical Field

The utility model relates to a battery structure, concretely relates to jar body of book seal battery jar that new energy automobile used.

Background

The new energy automobile uses the battery package as the whole car power supply, be equipped with a plurality of battery modules in its battery package, battery module comprises a plurality of battery monomers, battery monomer is the minimum unit that constitutes new energy battery system, constitute by positive pole, negative pole and electrolyte etc. battery monomer's shell is the battery jar, battery jar one end is anodal, the other end is the negative pole, inside the battery jar was all arranged in to material such as electrolyte, a plurality of assembled battery jars were arranged in the battery package with the parallel state gathering of axis.

After the can body of the battery can is finished, the end of the can body and the can cover are generally welded together. However, the welded thick end portions have low reliability and stability, and are prone to fracture, poor in contact, poor in explosion-proof performance and the like.

The tank body and the end cover are sealed by using a seaming process, so that adverse effects caused by welding can be avoided. When the battery can is sealed by rolling, the wall thickness problem of the battery can needs to be considered, if the wall thickness of the battery can is too thick, the cost of materials is increased, and the weight of the manufactured battery unit is increased, so that the energy density of the whole battery pack is reduced; if the thickness is thin, the battery cell is likely to have a problem of weak seaming.

In view of this, the present invention provides a can body for a battery can with a crimp seal to solve the above problems.

Disclosure of Invention

The utility model aims at providing a jar body of roll-up seal battery jar.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a can body of a roll-sealing closed battery can is cylindrical, at least one end of the can body is provided with an opening, the projection of the outer wall of the can body on the axial section of the can body is a straight line segment, the inner wall of the can body is provided with a circle of recess around the circumference of the can body, so that the can wall of the can body is divided into a thin-wall segment and a thick-wall segment, the thick-wall segment is positioned at the opening of the can body, and the thin-wall segment is positioned in the middle of the can body; the concave edge of the inner wall of the tank body is provided with a gradual change inclined plane, and the thin-wall section and the thick-wall section are in transition connection through the gradual change inclined plane.

Preferably, both ends of the tank body are provided with openings, the thick-wall sections are positioned at the openings at both ends of the tank body, the thin-wall sections are positioned between the thick-wall sections at both ends of the tank body, and the thin-wall sections and the thick-wall sections are in transition of gradual inclined planes.

Preferably, the one end of the jar body is the opening, and the other end is the blind end, thick wall section is located jar body one end opening part, thin wall section is located jar body middle part and blind end, is the transition of gradual change inclined plane between thin wall section and the thick wall section.

Preferably, the diameter of the outer wall of the tank body is 17mm to 67mm, the wall thickness of the thick wall section is 0.15mm to 0.45mm, the length of the thick wall section is 3mm to 35mm, and the wall thickness of the thin wall section is 0.1mm to 0.4 mm.

The relevant content in the above technical solution is explained as follows:

1. in the above scheme, if only one end of the tank body is an opening, the end opening is sealed by rolling after the electrolyte is filled, if both ends are openings, one end of the tank body is sealed by rolling before the electrolyte is filled, and the other end of the tank body is sealed by rolling after the electrolyte is filled.

2. In the scheme, the outer wall of the tank body is a smooth cylindrical surface and is represented as a straight line in the cross section, and the smooth tank wall can enable the gaps among the tank bodies to be smaller when the tank bodies are densely arranged.

3. In the above scheme, the inner wall of the tank body is a revolution surface with a concave middle part, and the inner wall is represented as a multi-segment line with a concave middle part in the cross section.

4. In the scheme, the thick-wall section at the opening end of the tank body is used for necking and flanging, so that the roll seal of the tank body is not easy to break.

5. In the scheme, the thin-wall section of the middle section of the tank body can reduce the weight of the tank body and improve the energy density, and a battery pack with the same weight can bear more battery units.

6. In the above scheme, the tank body gradual change inclined plane is a gradual change transition section formed by stretching the tank body.

Compared with the prior art, the utility model has the advantages of it is following:

firstly, the battery jar is light in weight, and the middle part is the thin wall section, reduces battery jar whole weight.

Second, intensity is reliable, and the open end is the thick wall section, and the reinforcing makes jar body difficult damaged.

And thirdly, materials are saved, and the thick wall section and the thin wall section are reasonably arranged, so that the whole material consumption is reduced.

And fourthly, the manufactured battery pack is high in energy density, the weight is light, meanwhile, the occupied volume of a welding seam is removed, the battery pack with the same weight can bear more battery units, and the energy density is improved.

Drawings

FIG. 1 is a perspective view of a can body;

FIG. 2 is a sectional view of the can body with openings at both ends in the axial direction;

FIG. 3 is a sectional view in the axial direction of a can body having an open end and a closed end;

in the above drawings: 1. a tank body; 2, opening; 3, sinking; a thin-walled segment; thick wall sections; 6, gradually changing the inclined plane; and 7, closed end.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example 1: tank body of battery tank sealed by rolling

Referring to attached drawings 1 and 2, a can body of a roll-sealed battery can is cylindrical, two ends of the can body 1 are provided with openings 2, a projection of an outer wall of the can body 1 on an axial section of the can body is a straight line segment, a circle of recess 3 is formed in the inner wall of the can body 1 and surrounds the inner wall of the can body in the circumferential direction, so that a can wall of the can body 1 is divided into a thin-wall section 4 and a thick-wall section 5, the thick-wall section 5 is located at the openings 2 at the two ends of the can body 1, the thin-wall section 4 is located between the thick-wall sections 5 at the two ends of the can body 1, the edge of the recess 3 in the inner wall of the can body 1 is provided with a gradually.

Preferably, the diameter of the outer wall of the tank body 1 is 17mm to 67mm, the wall thickness of the thick wall section 5 is 0.15mm to 0.45mm, the length is 3mm to 35mm, and the wall thickness of the thin wall section 4 is 0.1mm to 0.4 mm.

Example 2: tank body of battery tank sealed by rolling

Referring to attached drawings 1 and 3, a can body of a roll-sealed battery can is cylindrical, one end of the can body 1 is an opening 2, the other end of the can body is a closed end 7, a projection of an outer wall of the can body 1 on an axial section of the can body is a straight line segment, a circle of recess 3 is arranged on the inner wall of the can body 1 and surrounds the inner wall of the can body in the circumferential direction of the can body, so that the can wall of the can body 1 is divided into a thin-wall section 4 and a thick-wall section 5, the thick-wall section 5 is located at the opening 2 at two ends of the can body 1, the thin-wall section 4 is located in the middle of the can body 1 and the closed end 7, a gradual change inclined surface 6 is arranged at the edge.

Preferably, the diameter of the outer wall of the tank body 1 is 17mm to 67mm, the wall thickness of the thick wall section 5 is 0.15mm to 0.45mm, the length is 3mm to 35mm, and the wall thickness of the thin wall section 4 is 0.1mm to 0.4 mm.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (6)

1. The utility model provides a can body of roll-seal closed battery jar, its jar body (1) is cylindric, its characterized in that: the tank body (1) is provided with an opening (2) at least at one end, the projection of the outer wall of the tank body (1) on the axial section is a straight line segment, the inner wall of the tank body (1) is provided with a circle of recess (3) around the circumference of the tank body, so that the tank wall of the tank body (1) is divided into a thin-wall section (4) and a thick-wall section (5), the thick-wall section (5) is positioned at the opening (2) of the tank body (1), and the thin-wall section (4) is positioned in the middle of the tank body (1); the edge of the inner wall depression (3) of the tank body (1) is provided with a gradual change inclined plane (6), and the thin wall section (4) and the thick wall section (5) are in transition connection through the gradual change inclined plane (6).

2. The can of claim 1, wherein: the jar body (1) both ends are opening (2), thick wall section (5) are located jar body (1) both ends opening (2) department, thin wall section (4) are located between thick wall section (5) at jar body (1) both ends, are gradual change inclined plane (6) transition between thin wall section (4) and thick wall section (5).

3. The can of claim 1, wherein: the utility model discloses a jar body, including jar body (1), thick wall section (5), thin wall section (4), jar body (1) one end is opening (2), and the other end is blind end (7), thick wall section (5) are located jar body (1) one end opening (2) department, thin wall section (4) are located jar body (1) middle part and blind end (7), are gradual change inclined plane (6) transition between thin wall section (4) and thick wall section (5).

4. The can of claim 1, wherein: the diameter of the outer wall of the tank body (1) is 17mm to 67 mm.

5. The can of claim 1, wherein: the thick wall section (5) has a wall thickness of 0.15mm to 0.45mm and a length of 3mm to 35 mm.

6. The can of claim 1, wherein: the wall thickness of the thin-wall section (4) is 0.1mm to 0.4 mm.

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