CN218333932U

CN218333932U - Automatic liquid supplementing battery

Info

Publication number: CN218333932U
Application number: CN202221707678.XU
Authority: CN
Inventors: 项良顺; 谢跃; 赖美珍; 冯裔; 章飞; 相佳媛; 郭锋
Original assignee: Zhejiang Narada Power Source Co Ltd; Hangzhou Nandu Power Technology Co Ltd
Current assignee: Zhejiang Narada Power Source Co Ltd; Hangzhou Nandu Power Technology Co Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2023-01-17
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses an automatic fluid infusion battery aims at solving present battery and is difficult to carry out the fluid infusion because of its application scenario, leads to the battery inefficacy or battery thermal runaway not enough. The utility model discloses an including electric core and liquid storage container, electric core is equipped with the encapsulation packing, the fluid infusion hole has been installed to the encapsulation packing, fluid infusion hole fixedly connected with is broken piece in advance, and the encapsulation packing forms the enclosed environment through breaking piece in advance, electric core is located in the liquid storage container, breaking piece in advance is equipped with predetermined liquid feeding time, be equipped with electrolyte in the liquid storage container, electrolyte is in flow into the encapsulation packing after breaking piece leakproofness reduces in advance, predetermined liquid feeding time suits with the scarce liquid cycle of electric core. When the functional liquid is the electrolyte, the service life of the electrolyte of the battery cell is aligned with the sealing service life of the pre-breaking block, so that automatic and passive liquid supplementing is realized, and the service life of batteries difficult to supplement is effectively prolonged. When the functional liquid is the liquid extinguishing agent, the functional liquid can get into the inside cooling of electric core when the battery thermal runaway, improves the battery security.

Description

Automatic liquid supplementing battery

Technical Field

The utility model relates to a battery field, more specifically say, it relates to automatic fluid infusion battery.

Background

At present, the problem that the battery performance is reduced due to the consumption of electrolyte after the battery is used for a long time exists, and the risk of thermal runaway and even spontaneous combustion of the battery due to internal short circuit exists.

In case of a problem of a decrease in the electrolyte level of the battery, the electrolyte may be replenished.

For the problem of thermal runaway of the battery, the safety of the battery can be improved by cooling the battery, for example, fire extinguishing agents are injected to reduce the spontaneous combustion probability.

Chinese patent publication No. CN113437452A, entitled battery electrolyte injection assembly and electrolyte injection system, discloses a battery electrolyte injection assembly and electrolyte injection system. The battery electrolyte injection assembly comprises a liquid injection needle and a sealing sleeve which are coaxially arranged, wherein the sealing sleeve is arranged on the outer side of the liquid injection needle, the liquid injection needle is provided with a channel for electrolyte to flow, and the channel penetrates through two ends of the liquid injection needle in the length direction of the channel; the liquid injection needle comprises an extending section, and the extending section is used for extending into the battery through the liquid injection hole of the battery so as to enable the electrolyte in the channel to flow into the battery; part of the structure of the sealing sleeve is used for extending into the battery through the liquid injection hole; the sealing sleeve is provided with a first end part and a second end part which are distributed in the extending direction of the sealing sleeve, and the outer diameter of the first end part is different from that of the second end part.

The document provides a fluid infusion device, but the device requires manual intervention and cannot automatically infuse fluid. In view of this, the present application aims to realize an automatic liquid replenishing battery, which can replenish liquid for a battery after a predetermined condition is satisfied, maintain the normal operation of the battery or improve the safety of the battery.

Disclosure of Invention

The utility model overcomes present battery is difficult to carry out the not enough of fluid infusion because of its application, provides an automatic fluid infusion battery, after satisfying the condition, can carry out the fluid infusion for the battery, prolongs the life-span of battery or improves the security of battery.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides an automatic fluid infusion battery, includes electric core and liquid storage container, electric core is equipped with the fluid infusion hole, the fluid infusion hole is packaged with the piece of breaking in advance, and electric core is arranged in the liquid storage container, is equipped with the functional liquid in the liquid storage container, and the functional liquid flows into electric core after the piece leakproofness of breaking in advance reduces.

The electric core is arranged in the liquid storage container, when the pre-breaking block fails, the sealing performance of the pre-breaking block is lost, and functional liquid in the liquid storage container outside the electric core enters the electric core to realize functions. The service life and the high temperature and high pressure resistance of the pre-breaking block are inferior to those of various parts on the surface of the battery cell, and the pre-breaking block is artificially set as a weak part of the battery cell. The device can realize liquid supplement for the battery core by utilizing the attribute of the pre-breaking block under the condition of no external interference. When the functional liquid is electrolyte, the functional liquid entering the battery core can be used for maintaining the performance of the battery, so that the service life of the battery is prolonged; when the functional liquid is a liquid fire extinguishing agent, the functional liquid entering the battery core can improve the safety of the battery.

Preferably, the liquid storage container is enclosed by the liquid storage plate, and a battery shell is arranged outside the liquid storage container. The battery core, the liquid storage plate and the battery shell are of a three-layer structure. The gap between the liquid storage plate and the cell forms a chamber for containing electrolyte. And sealing between the adjacent liquid storage plates.

Preferably, the functional liquid is an electrolyte, and the breaking time of the pre-breaking block is adapted to the preset liquid adding time of the battery core.

Preferably, the preset liquid adding time is 2 years, the time of 2 years is preset battery performance decay time obtained by simulating the working condition of the battery, and the service life of the pre-breaking block is close to the preset battery performance decay time.

Preferably, the functional liquid is a liquid fire extinguishing agent, and the damage temperature and the damage strength of the pre-breaking block are lower than the risk temperature of the battery core. The liquid fire extinguishing agent absorbs heat and cools when flowing into the battery, and specifically, the liquid fire extinguishing agent is perfluorohexanone.

Preferably, the liquid storage container is a battery shell, the electrolyte is located inside the battery shell, the battery shell is provided with an insulating layer, and the cell-battery shell two-layer structure can simplify the internal design and components of the battery and achieve the purpose of reducing cost.

Preferably, the pre-breaking block is located at the bottom end of the cell. When the pre-breaking block is positioned at a lower position, the functional liquid is easier to flow into the battery cell.

Preferably, the material of the pre-breaking block is polyethylene, polypropylene or polybutylene, and the copolymers have similar properties and gradually age after a predetermined time to lose the sealing property, wherein the compression ratio of the polyethylene, polypropylene or polybutylene in the extrusion molding is 10-20%.

Preferably, the battery core and the pre-breaking block are of an integrated structure, and the battery core and the pre-breaking block are processed through an integrated forming process.

Preferably, the battery core is provided with a packaging package, and the packaging package is formed by thermal packaging of an aluminum plastic film.

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

(1) When the functional liquid is electrolyte, the service life of the electrolyte of the battery core is aligned with the sealing service life of the pre-breaking block, so that automatic and passive liquid supplement is realized, and the service lives of batteries difficult to supplement are effectively prolonged.

(2) When the functional liquid is the liquid fire extinguishing agent, the functional liquid can get into the inside cooling of electricity core when the battery thermal runaway, improves the battery security.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is an exploded view of another embodiment of the present invention;

FIG. 4 is a schematic front view of the liquid storage plate of the present invention;

in the figure:

the battery comprises a battery core 1, a packaging package 2, a pre-breaking block 3, a battery shell 4, a battery cover 6 and a liquid storage plate 7.

Detailed Description

The present disclosure is further described with reference to the following drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.

In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.

The embodiment is as follows:

an automatic liquid supplementing battery comprises an electric core 1 and a liquid storage container, wherein the electric core 1 is provided with a packaging package 2, the packaging package 2 is provided with a liquid supplementing hole, the liquid supplementing hole is fixedly connected with a pre-breaking block 3, concretely, the packaging package 2 is made of an aluminum plastic film, the aluminum plastic film is subjected to heat sealing to form the packaging package 2, the packaging package 2 and the pre-breaking block 3 are formed through an integrated forming process, the two integrated structures are formed, and the packaging package 2 forms a closed environment through the pre-breaking block 3.

As shown in fig. 2, the battery cell 1 is located in a liquid storage container, the pre-breaking block 3 has a predetermined liquid adding time, and the liquid storage container is filled with a functional liquid. In this embodiment, the liquid storage container is enclosed by a liquid storage plate 7, a space between the liquid storage plate 7 and the electric core 1 is used for containing functional liquid, and a battery shell 4 is arranged outside the liquid storage container. The packaging package 2, the liquid storage plate 7 and the battery shell 4 are of a three-layer structure.

In other possible embodiments, as shown in fig. 3, the liquid storage container is a battery shell 4, the functional liquid is located in the gap between the battery shell 4 and the battery core 1, the battery shell 4 is provided with an insulating layer, and the packaging package 2-the battery shell 4 has a two-layer structure, which can simplify the internal design and components of the battery.

The functional liquid flows into the package 2 after the sealing performance of the pre-breaking block 3 is reduced. In one embodiment, the functional fluid is an electrolyte. In another embodiment, the functional liquid is a liquid fire extinguishing agent, and the damage temperature and the damage strength of the pre-breaking block are lower than the risk temperature of the battery core. Specifically, the liquid fire extinguishing agent is perfluorohexanone.

The preset time for losing the sealing performance of the pre-breaking block 3 is adapted to the preset liquid adding time of the battery core 1, wherein the preset liquid adding time is 2 years, the time of 2 years is the preset battery performance decay time obtained by simulating the working condition of the battery, and the service life of the pre-breaking block 3 is similar to the preset liquid adding time. In some other possible embodiments, the predetermined charging time is 1000 cycles of the battery cell.

The material of the pre-breaking block 3 is polyethylene, polypropylene or polybutylene, the copolymers have similar properties and can gradually age and lose the sealing property after a preset time, wherein the compression ratio of the pre-breaking block 3 in extrusion forming is 10-20%, and the sealing property can also be lost under high temperature or high pressure.

In another embodiment, the battery case 4 includes a battery cover 6, which is located at the top of the battery case, and the battery cover 6 is always upward for stabilizing the moving posture of some batteries, and the pre-breaking block 3 is located at the bottom end of the battery core 1. When the pre-breaking block 3 is positioned at a lower position, the functional liquid can flow into the battery cell 1 more easily.

The battery core 1 is arranged in the liquid storage container, when the pre-breaking block fails, the sealing performance of the pre-breaking block is lost, and the functional liquid in the liquid storage container outside the battery core enters the battery core to realize the function. The life and high temperature and high pressure resistance of the pre-breaking block 3 are inferior to those of the package 2, and the pre-breaking block is artificially set as a weak portion of the package 2. The device can realize liquid supplement for the battery cell 1 by utilizing the attribute of the pre-breaking block 3 under the condition of no external interference. When the functional liquid is electrolyte, the functional liquid entering the battery core can be used for maintaining the performance of the battery, so that the service life of the battery is prolonged; when the functional liquid is a liquid fire extinguishing agent, the functional liquid entering the battery core can improve the safety of the battery.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the claims.

Claims

1. The automatic liquid supplementing battery is characterized by comprising an electric core and a liquid storage container, wherein the electric core is provided with a liquid supplementing hole, a pre-breaking block is packaged in the liquid supplementing hole, the electric core is positioned in the liquid storage container, functional liquid is arranged in the liquid storage container, and the functional liquid flows into the electric core after the sealing performance of the pre-breaking block is reduced.

2. The automatic liquid replenishing battery of claim 1, wherein the pre-breaking block is made of polyethylene, polypropylene or polybutylene.

3. The automatic liquid replenishing battery of claim 2, wherein the cell and the pre-breaking block are integrally formed.

4. The automatic liquid replenishing battery of claim 1, wherein the pre-breaking block is located at the bottom end of the cell.

5. The automatic liquid replenishing battery of claim 1, wherein the functional liquid is an electrolyte, and the destruction time of the pre-breaking block is adapted to the predetermined charging time of the battery cell.

6. The automatic liquid replenishing battery according to claim 5, wherein the predetermined liquid adding time is 2 years.

7. The automatic liquid replenishing battery of claim 1, wherein the functional liquid is a liquid fire extinguishing agent, and the destruction temperature and the destruction strength of the pre-breaking block are lower than the risk temperature of the battery core.

8. The automatic liquid replenishing battery of claim 1, wherein the battery cell is provided with a packaging package, and the packaging package is formed by heat-sealing an aluminum plastic film.

9. The automatic liquid replenishing battery according to claim 1, wherein the liquid storage container is a battery case, the electrolyte is located inside the battery case, and the battery case is provided with an insulating layer.

10. The automatic liquid replenishing battery according to claim 1, wherein the liquid storage container is surrounded by a plurality of liquid storage plates, and a battery shell is arranged outside the liquid storage container.