CN207938726U - a kind of safety-type lithium battery - Google Patents

Abstract

The utility model discloses a kind of safety-type lithium battery, including battery case, battery core, upper cover body；Battery case includes outer housing and inner housing, and the cushion chamber of annular is formed between outer housing and inner housing；Battery core is built in inner housing, and one end of outer housing is equipped with opening, and upper cover body is threadedly coupled with the open at one end of outer housing；The side wall of inner housing is wavy, and annular groove is disposed adjacent with annular protrusion；The side wall of inner housing is equipped with several relief holes, is covered with a burst disk on each relief hole, is tightly connected with corresponding relief hole by fluid sealant arround burst disk；Each burst disk is divided into upper sawtooth piece, lower sawtooth piece along center axis, is connected between upper sawtooth piece, lower sawtooth piece；Upper cover body is equipped with relief valve, and the cavity being connected to cushion chamber is formed between inner housing and upper cover body.The utility model inner casing it is wavy be conducive to keep battery structure stability, by relief valve can manually or automatically pressure release, the service life of battery can be extended.

Description

A kind of safety-type lithium battery

Technical field

The utility model is related to technical field of lithium batteries more particularly to a kind of safety-type lithium batteries.

Background technology

It by lithium metal or lithium alloy is negative material, using the battery of non-aqueous electrolytic solution that lithium battery, which is a kind of,.For many years Come, the place that material and battery processing technology selected by lithium battery also all make great progress, but still have much room for improvement, such as battery The stability problem of structure is easily deformed whens by bad external force etc..In addition, in lithium battery use to the appearance such as inside battery core When problem, can only entirely it scrap, waste of resource.

Utility model content

The purpose of this utility model is to provide a kind of safety-type lithium battery, and the wavy of inner casing is conducive to keep battery structure Stability, by relief valve can manually or automatically pressure release, the service life of battery can be extended.

To achieve the above object, using following technical scheme：

A kind of safety-type lithium battery, including battery case, battery core, upper cover body；The battery case includes outer housing and interior Shell forms the cushion chamber of annular between outer housing and inner housing；The battery core is built in inner housing, and one end of outer housing is equipped with Opening, upper cover body are threadedly coupled with the open at one end of outer housing；The side wall of the inner housing is wavy and includes interval setting To the central axis direction of side wall be recessed annular groove and it is spaced to far from side wall central axis direction protrusion ring Shape protrusion, annular groove are disposed adjacent with annular protrusion；The side wall of the inner housing is equipped with several relief holes, on each relief hole It is covered with a burst disk, is tightly connected with corresponding relief hole by fluid sealant arround burst disk；Each burst disk is along its center Axis is divided into sawtooth piece, lower sawtooth piece, is connected between upper sawtooth piece, lower sawtooth piece；The upper cover body is equipped with pressure release Valve forms the cavity being connected to cushion chamber between inner housing and upper cover body.

Preferably, the relief hole is set as arc strip hole, and it is arranged along the bottom of annular groove.

Preferably, the relief valve is set to upper cover body centre position.

Preferably, the burst disk uses beallon material.

Preferably, the fluid sealant uses polyurethane sealant.

Using the above scheme, the utility model has the beneficial effects that：

1) the wavy stability for being conducive to keep battery structure of inner casing, reinforces the resistance to compression of battery structure to a certain extent Performance；

2) by relief valve can manually or automatically pressure release, the service life of battery can be extended；

3) upper cover body is threadedly coupled with the open at one end of outer housing, easy to disassemble or replacement internal structure.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the stereogram of the utility model；

Fig. 3 is the structural schematic diagram that Fig. 1 saves outer housing, upper cover body, relief valve；

Fig. 4 is the burst disk structural schematic diagram of the utility model；

Wherein, description of drawing identification：

1-battery case, 2-upper cover bodies,

3-burst disks, 4-relief valves,

11-outer housings, 12-inner housings,

31-upper sawtooth pieces, 32-lower sawtooth pieces,

121-annular grooves, 122-annular protrusions.

Specific implementation mode

Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.

Shown in 4, the utility model provides a kind of safety-type lithium battery, including battery case 1, battery core are (in figure Be not shown), upper cover body 2；The battery case 1 includes outer housing 11 and inner housing 12, shape between outer housing 11 and inner housing 12 The cushion chamber circularized；The battery core is built in inner housing 11, and one end of outer housing 12 is equipped with opening, upper cover body 2 and outer housing 11 open at one end is threadedly coupled；The side wall of the inner housing 12 is wavy and includes the spaced central shaft to side wall The annular groove 121 and the spaced annular protrusion 122 to the central axis direction protrusion far from side wall of direction recess, annular Groove 121 is disposed adjacent with annular protrusion 122；The side wall of the inner housing 12 is equipped with several relief holes, each relief hole overlying It is stamped a burst disk 3, is tightly connected with corresponding relief hole by fluid sealant arround burst disk 3；Each burst disk 3 is along its center Axis is divided into sawtooth piece 31, lower sawtooth piece 32, is connected between upper sawtooth piece 31, lower sawtooth piece 32；In the upper cover body 2 Equipped with relief valve 4, the cavity being connected to cushion chamber is formed between inner housing 12 and upper cover body 2.

Wherein, the relief hole is set as arc strip hole, and is arranged along the bottom of annular groove 121.The relief valve 4 is set In 2 centre position of upper cover body.The burst disk 3 uses beallon material.The fluid sealant uses polyurethane sealant.

Utility model works principle：

When air pressure inside inner housing 12 is excessive, can it is open-top (burst disk 3 be arranged on annular groove 121, be conducive to gas Press to outer open-top) upper sawtooth piece 31, the lower sawtooth piece 32 of burst disk 3.After gas enters cushion chamber, when the air pressure in cushion chamber reaches When to setting value, 4 releasing pressure automatically of relief valve；When inner housing 12 air pressure reduce after, burst disk 3 restore supreme sawtooth piece 31, under Sawtooth piece 32 is connected state (the beallon material that burst disk 3 uses is memory material).Meanwhile it being also manually operable and letting out Gas in cushion chamber is discharged pressure valve 4.Upper cover body 2 is threadedly coupled with outer housing 11, and outer housing 11 is revolved relative to upper cover body 2 Turn to install or remove.

The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all in this practicality All any modification, equivalent and improvement etc., should be included in the guarantor of the utility model made by within novel spirit and principle Within the scope of shield.

Claims (5)

1. a kind of safety-type lithium battery, which is characterized in that including battery case, battery core, upper cover body；The battery case includes outer Shell and inner housing form the cushion chamber of annular between outer housing and inner housing；The battery core is built in inner housing, outer housing One end is equipped with opening, and upper cover body is threadedly coupled with the open at one end of outer housing；The side wall of the inner housing is wavy and includes The spaced annular groove being recessed to the central axis direction of side wall and the spaced central axis direction to separate side wall The annular protrusion of protrusion, annular groove are disposed adjacent with annular protrusion；The side wall of the inner housing is equipped with several relief holes, each It is covered with a burst disk on relief hole, is tightly connected with corresponding relief hole by fluid sealant arround burst disk；Each burst disk It is divided into upper sawtooth piece, lower sawtooth piece along center axis, is connected between upper sawtooth piece, lower sawtooth piece；In the upper cover body Equipped with relief valve, the cavity being connected to cushion chamber is formed between inner housing and upper cover body.

2. safety-type lithium battery according to claim 1, which is characterized in that the relief hole is set as arc strip hole, and It is arranged along the bottom of annular groove.

3. safety-type lithium battery according to claim 1, which is characterized in that the relief valve is set to upper cover body interposition It sets.

4. safety-type lithium battery according to claim 1, which is characterized in that the burst disk uses beallon material.

5. safety-type lithium battery according to claim 4, which is characterized in that the fluid sealant uses polyurethane sealant.