CN215933662U

CN215933662U - Lithium battery with protective shell

Info

Publication number: CN215933662U
Application number: CN202122417294.6U
Authority: CN
Inventors: 汪天奇; 李学兵; 周佃国; 黄桂东; 高正林; 季莹莹; 路遥
Original assignee: Lianyungang Haichuang Electronic Technology Co ltd
Current assignee: Lianyungang Haichuang Electronic Technology Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-03-01
Anticipated expiration: 2031-10-08

Abstract

The utility model discloses a lithium battery with a protective shell, which comprises an upper battery shell and a lower battery shell, wherein concave lead-out grooves are formed in corresponding positions on the upper battery shell and the lower battery shell, and the upper battery shell and the lower battery shell are combined to form a cavity for storing a lithium battery core. In the utility model, in order to avoid the problems of difficult sealing and difficult compromise of anti-explosion performance, the shell is formed by combining the upper shell and the lower shell of the battery, the sealing property is realized by coating PP (polypropylene) colloid on a matching surface, and the sealing of an assembly part is realized by hot melting and pressing, so that the defect of difficult sealing is overcome; and when the lithium battery core has a short circuit fault, the PP colloid can be melted by high temperature and high pressure generated by short circuit, so that high-pressure and high-temperature gas is released rapidly, the problem of blasting is avoided, and the problem that the antiknock property cannot be considered is solved.

Description

Lithium battery with protective shell

Technical Field

The utility model relates to the field of lithium batteries, in particular to a lithium battery with a protective shell.

Background

The external package of the lithium battery at present is divided into a cylindrical shell, a square shell and a special-shaped shell from the shape, and is divided into an aluminum shell, a metal steel shell and a composite flexible packaging material from the material. These packaging and material forms each have advantages, often significant advantages, and also significant disadvantages, such as the aluminum housing being easily formed but not rigid enough to be larger and having the risk of short circuiting after being pierced; the steel shell has good rigidity and is not easy to form, the metal material is not easy to seal during manufacturing, the sealing cost is high, the anti-explosion performance after sealing is difficult to take into account, the explosion of the battery is easy to occur, and the like seriously threatens the life safety of passengers; although the composite soft package material can avoid the deflagration phenomenon to the maximum extent, the composite soft package material is difficult to form due to the fact that the material is soft, and the heat dissipation is not as good as that of a metal material.

Therefore, the size of the single battery cell is limited for various reasons, the single battery cell is too small, hundreds of single batteries are used by a single trolley, and the difficulty and the cost of battery management are increased.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a lithium battery with a protective housing and a method for assembling the same, which solves the above-mentioned problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

a lithium battery having a protective housing, comprising: casing and battery are down gone up to the battery, and corresponding position on casing and the battery under the casing on the battery is equipped with the spill groove of drawing forth, casing and battery under the casing merge and constitute a cavity that is used for depositing lithium cell electricity core on the battery, the sufficient cavity outside of casing and battery under the battery on the battery is stretched out through the groove to electric core utmost point ear on the lithium cell electricity core, the cooperation department of casing and battery under on the battery and the cooperation department of electric core utmost point ear and drawing forth groove all are equipped with the PP colloid that is used for sealing.

Furthermore, the battery upper shell and the battery lower shell are both made of steel materials and formed by one-time stamping.

Furthermore, the lead-out grooves are both positioned on the same side of the upper battery shell and the lower battery shell.

Furthermore, the lead-out grooves are respectively positioned on two opposite sides of the upper battery shell and the lower battery shell.

Further, the PP colloid is a PP polypropylene modified material capable of being subjected to hot melting.

Compared with the prior art, the utility model has the beneficial effects that:

in the utility model, in order to avoid the problems of difficult sealing and difficult compromise of anti-explosion performance, the shell is formed by combining the upper shell and the lower shell of the battery, the sealing performance is realized by coating PP (polypropylene) colloid on a matching surface and realizing the sealing of an assembly part through hot melting and pressing, and the defect of difficult sealing is solved.

And when the lithium battery core has a short circuit fault, the PP colloid can be melted by high temperature and high pressure generated by short circuit, so that high-pressure and high-temperature gas is released rapidly, the problem of blasting is avoided, and the problem that the antiknock property cannot be considered is solved.

In addition, a heat dissipation structure can be arranged on the shell made of the metal material so as to dissipate heat generated by the battery when the battery works and improve the safety and stability of the work; the split type casing of two halves is favorable to placing of lithium cell electric core, and the effectual equipment difficulty problem of solving the big electric core of monomer more than 50cm size.

Drawings

Fig. 1 is an exploded view of a lithium battery having a protective casing;

fig. 2 is a schematic structural diagram of a lower battery case in a lithium battery with a protective casing.

In the figure: 1. a battery upper case; 2. a battery lower case; 3. a lead-out groove; 4. a lithium battery cell; 5. a battery core tab; 6. and (3) PP colloid.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

a lithium battery having a protective housing, comprising: casing 2 under casing 1 and the battery on the battery, and casing 1 and the battery under on the battery corresponding position on the casing 2 be equipped with concave lead-out groove 3, casing 1 and battery under casing 2 merge and constitute a cavity that is used for depositing lithium cell electric core 4 on the battery, the electric core utmost point ear 5 on the lithium cell electric core 4 stretches out the battery on casing 1 and the battery under the cavity outside that casing 2 can become through lead-out groove 3, casing 1 and battery under 2 cooperation department and electric core utmost point ear 5 and the cooperation department of lead-out groove 3 all are equipped with the PP colloid 6 that is used for sealing on the battery.

The upper battery shell 1 and the lower battery shell 2 are both steel shells formed by one-step stamping, so that the stable quality of the upper battery shell 1 and the lower battery shell 2 is ensured, and the production efficiency is higher.

The lead-out grooves 3 are both positioned on the same side of the upper battery shell 1 and the lower battery shell 2; the lead-out grooves 3 are respectively positioned on two opposite sides of the upper battery shell 1 and the lower battery shell 2, and can adopt different positions according to actual use requirements.

The PP colloid 6 is a PP polypropylene modified material capable of being melted by heat, has good sealing performance, and can be melted at high temperature, so that the upper shell 1 and the lower shell 2 of the battery have certain anti-explosion performance after being sealed by the PP colloid 6.

The steel shell is good in rigidity, in order to avoid the problems that sealing is not easy and anti-explosion performance is difficult to take into account, the shell is formed by combining the upper shell 1 of the battery and the lower shell 2 of the battery, PP colloid 6 is coated on a matching surface in the sealing performance, sealing of an assembly position is achieved through hot melting and pressing, and the defect that sealing is not easy is overcome.

And when the lithium battery core 4 has a short circuit fault, the PP colloid 6 can be melted by high temperature and high pressure generated by short circuit, so that high-pressure and high-temperature gas is released rapidly, the problem of explosion is avoided, and the problem that the anti-explosion performance cannot be considered is solved.

In addition, a heat dissipation structure can be arranged on the shell made of the metal material so as to dissipate heat generated by the battery when the battery works and improve the safety and stability of the work; the two halves of the split type shell are beneficial to the placement of the lithium battery cell 4, and the problem of difficulty in assembling the single large battery cell with the size of more than 50cm, for example, the problem of difficulty in entering the shell when the current popular blade battery is assembled, is effectively solved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which includes the appended claims and their equivalents.

Claims

1. A lithium battery having a protective housing, comprising: casing (2) under casing (1) and the battery on the battery, and casing (1) and the battery on the battery corresponding position on casing (2) be equipped with concave groove (3) of drawing forth, casing (1) and battery under casing (2) merge and constitute a cavity that is used for depositing lithium cell electricity core (4) on the battery, electric core utmost point ear (5) on lithium cell electricity core (4) stretch out the battery through drawing forth groove (3) and go up the casing (1) and the battery under casing (2) the enough cavity outside that becomes, casing (1) and battery under the cooperation department of casing (2) and electric core utmost point ear (5) and the cooperation department of drawing forth groove (3) all are equipped with and are used for sealed PP colloid (6) on the battery.

2. A lithium battery having a protective casing as claimed in claim 1, characterized in that: the upper battery shell (1) and the lower battery shell (2) are both steel shells formed in one-step stamping mode.

3. A lithium battery having a protective casing as claimed in claim 1, characterized in that: the lead-out grooves (3) are positioned on the same side of the upper battery shell (1) and the lower battery shell (2).

4. A lithium battery having a protective casing as claimed in claim 1, characterized in that: the lead-out grooves (3) are respectively positioned on two opposite sides of the upper battery shell (1) and the lower battery shell (2).

5. A lithium battery having a protective casing as claimed in claim 1, characterized in that: the PP colloid (6) is a PP polypropylene modified material capable of being subjected to hot melting.