CN211182266U

CN211182266U - Lithium battery cell that security performance is high

Info

Publication number: CN211182266U
Application number: CN201921654683.7U
Authority: CN
Inventors: 王驰伟; 冯树南; 祁春翔
Original assignee: Jiangsu Weifeng Power Industry Co ltd
Current assignee: Jiangsu Weifeng Power Industry Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-08-04
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a lithium battery cell with high safety performance, which comprises a lithium battery protection shell and a core body, wherein the lithium battery protection shell consists of an outer protective shell and an inner protective shell, the inner protective shell is sleeved in the inner cavity of the outer protective shell, a space is arranged between the outer protective shell and the inner protective shell, the core body is arranged in the cavity of the inner protective shell, an interlayer is arranged inside the inner protective shell, and an explosion-proof liquid is filled in the interlayer, the inner protective shell adopts a folding bending shape, a heat dissipation component is arranged in the space between the outer protective shell and the inner protective shell and is fixed on the outer wall of the inner protective shell, a ventilation zone is arranged at the position of the heat dissipation component of the outer protective shell, the protection effect on the lithium battery cell is improved by arranging the double-layer structure lithium battery protection shell of the inner protective shell outside the core body, utilize radiator fan with the high temperature air suction between outer protective housing and the interior protective housing, be convenient for dispel the heat fast, avoid the core to be in the danger that high temperature environment produced the explosion.

Description

Lithium battery cell that security performance is high

Technical Field

The utility model relates to a lithium cell technical field specifically is a lithium cell electricity core that security performance is high.

Background

Lithium batteries (L, lithium batteries) refer to batteries containing lithium (including metallic lithium, lithium alloys and lithium ions, lithium polymers) in electrochemical systems and are broadly divided into two types, lithium metal batteries and lithium ion batteries.

However, the existing lithium battery cells have the following disadvantages:

1. lithium cell electricity core can produce the heat at long-time charge-discharge in-process, and the heat is piled up in the lithium cell, and lithium cell electricity core is in high temperature environment for a long time, the easy explosion that takes place.

2. The external part of the existing lithium battery cell is only provided with a thin shell, so that the lithium battery cell is easy to damage when being impacted by external force.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lithium battery cell with high safety performance, which can generate heat in the long-time charging and discharging process of the lithium battery cell in the background technology, the heat is accumulated in the lithium battery, and the lithium battery cell is in a high-temperature environment for a long time and is easy to explode; the external part of the existing lithium battery cell is only provided with a thin shell, so that the lithium battery cell is easy to damage when being impacted by external force.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a lithium battery cell that security performance is high, includes lithium battery protection casing and core, lithium battery protection casing comprises outer protective housing and inner protective housing, interior protective housing cover is in the inner chamber of outer protective housing, and has a space between outer protective housing and the inner protective housing, the cavity of protective housing including the core sets up, the inside intermediate layer that is equipped with of inner protective housing, and the intermediate layer intussuseption is filled with explosion-proof liquid, the inner protective housing adopts folding crooked form, be equipped with radiator unit in the space between outer protective housing and the inner protective housing, and radiator unit fixes at the inner protective housing outer wall, the position that outer protective housing is located radiator unit is equipped with ventilative district, lithium battery protection casing outside is equipped with radiator fan, and the space intercommunication that forms between radiator fan and outer protective housing and the inner protective housing.

Preferably, four corners of the inner cavity of the outer protective shell are provided with fixed blocks, the outer corners of the inner protective shell are connected with the fixed blocks, and the four corners of the darting of the inner protective shell are fixed by the four groups of the fixed blocks, so that the inner protective shell is not prone to shaking.

Preferably, the heat radiation component includes heat-conducting plate, heat dissipation fin, heat conduction filler and presss from both sides the chamber, the heat dissipation fin is provided with the multiunit, and the heat dissipation fin sets up perpendicularly on the heat-conducting plate, the heat dissipation fin sets up side by side on the heat-conducting plate, the surface of protective housing including the fixing of heat-conducting plate, be equipped with on the heat-conducting plate and press from both sides the chamber to and press from both sides the intracavity intussuseption and be equipped with the heat conduction filler, during the use, utilize multiunit heat dissipation fin to increase.

Preferably, the heat-conducting filler is heat-conducting silicone grease, and heat generated by the core is rapidly transferred to the heat-radiating member by the heat-conducting silicone grease, so that the heat-radiating effect is improved.

Preferably, ventilation holes are formed in the ventilation area, multiple groups of ventilation holes are formed in the ventilation area, the air suction opening of the cooling fan is located outside the ventilation holes, and the ventilation holes are utilized, so that the cooling fan can have an air suction space when absorbing heat.

Preferably, the side of the inner protective shell is provided with a plurality of groups of heat dissipation members to increase the heat dissipation effect, so that the four sides of the inner protective shell can dissipate heat.

The utility model provides a lithium cell electricity core that security performance is high possesses following beneficial effect:

(1) the utility model discloses a set up lithium battery protection casing in the core outside, utilize lithium battery protection casing protection core, and lithium battery protection casing adopts the bilayer structure of protective housing inner protective housing for lithium battery protection casing's protecting effect is better, improves the protecting effect to lithium battery cell.

(2) The utility model discloses an outer wall including the protective housing sets up the heat radiation component, utilize in the heat radiation component in time transmits the space between outer protective housing and the inner protective housing with the heat on the inner protective housing, and set up radiator fan in the outside of outer protective housing, set up the ventilative district with external intercommunication simultaneously on the outer protective housing, during the use, radiator fan is with the high temperature air suction between outer protective housing and the inner protective housing, inhale external low temperature air simultaneously, air flow between outer protective housing and the inner protective housing with higher speed, be convenient for dispel the heat fast, avoid the core to be in the danger that high temperature environment produced the explosion.

(3) The utility model discloses an adopt heat-conducting plate and multiunit heat dissipation fin to constitute with the radiating component, the heat dissipation fin is when increasing heat radiating area, and usable heat dissipation fin supports outer protective housing and inner protective housing, sets up the heat conduction filler in the heat-conducting plate simultaneously, utilizes the heat conduction filler can heat conduction fast, improves heat conduction and radiating effect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a heat dissipation member of the present invention;

fig. 3 is the utility model discloses a lithium battery protection shell structure schematic diagram of inner protective shell.

In the figure: 100. a lithium battery protection case; 110. an outer protective shell; 111. a breathable zone; 120. an inner protective shell; 121. an interlayer; 122. an explosion-proof liquid; 200. a heat dissipating member; 210. a heat conducting plate; 211. a thermally conductive filler; 212. a clamp cavity; 220. a heat dissipating fin; 300. a core body; 400. a fixed block; 500. a heat dissipation fan.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-3, the utility model provides a technical solution: a lithium battery cell with high safety performance comprises a lithium battery protection shell 100 and a core body 300, the lithium battery protection casing 100 is composed of an outer protection casing 110 and an inner protection casing 120, the inner protection casing 120 is sleeved in an inner cavity of the outer protection casing 110, a space is formed between the outer protective shell 110 and the inner protective shell 120, the core body 300 is arranged in the cavity of the inner protective shell 120, an interlayer 121 is arranged in the inner protective shell 120, and the interlayer 121 is filled with the explosion-proof liquid 122, the inner protective shell 120 adopts a folding curved shape, a heat radiating member 200 is provided in a space between the outer protective case 110 and the inner protective case 120, and the heat dissipation member 200 is fixed on the outer wall of the inner protective shell 120, the outer protective shell 110 is provided with a ventilation zone 111 at the position of the heat dissipation member 200, the exterior of the lithium battery protective shell 100 is provided with a heat dissipation fan 500, and the heat dissipation fan 500 communicates with the space formed between the outer protective case 110 and the inner protective case 120.

Preferably, the fixing blocks 400 are disposed at four corners of the inner cavity of the outer protective shell 110, the outer corners of the inner protective shell 120 are connected to the fixing blocks 400, and the fixing blocks 400 can be used to reinforce the stability of the connection between the outer protective shell 110 and the inner protective shell 120.

Preferably, the heat dissipation member 200 includes a heat conduction plate 210, heat dissipation fins 220, a heat conductive filler 211, and a cavity 212, the heat dissipation fins 220 are provided with a plurality of sets, and the heat dissipation fins 220 are vertically disposed on the heat conduction plate 210, the heat dissipation fins 220 are disposed on the heat conduction plate 210 side by side, the surface of the protective housing 120 including the heat conduction plate 210 is fixed, the heat conduction plate 210 is provided with the cavity 212, and the cavity 212 is filled with the heat conductive filler 211, and the heat dissipation member 200 is utilized to perform rapid heat dissipation while rapidly guiding out the heat generated by the core 300.

Preferably, the heat conductive filler 211 is heat conductive silicone grease, and the heat can be rapidly transferred to the heat dissipation member 200 by utilizing the rapid heat conductivity of the heat conductive silicone grease.

Preferably, ventilation holes are formed in the ventilation area 111, and multiple groups of ventilation holes are formed in the ventilation area, and the air suction opening of the cooling fan 500 is located outside the ventilation holes, so that the cooling fan 500 can suck out hot air between the outer protective shell 110 and the inner protective shell 120 through the ventilation holes and suck in low-temperature gas.

Preferably, the heat dissipation members 200 are disposed on the side surfaces of the inner protective shell 120, so as to improve the heat dissipation efficiency.

It should be noted that, in operation, because the lithium battery protection casing 100 is disposed outside the core body 300, the core body 300 is protected by the lithium battery protection casing 100, and the lithium battery protection casing 100 adopts a double-layer structure in which the outer protection casing 110 is sleeved outside the inner protection casing 120, so that the protection effect of the lithium battery protection casing 100 is better, wherein, because the outer wall of the inner protection casing 120 directly contacting with the core body 300 is connected to the heat conduction plate 210 of the heat dissipation member 200, when in use, the heat conduction filler 211 in the inner cavity 212 of the heat conduction plate 210 rapidly guides the heat generated in the charging and discharging processes of the core body 300 onto the heat dissipation fins 220 of the heat dissipation member 200, the heat dissipation fins 220 are utilized for heat dissipation, and the heat dissipation fan 500 is installed outside the outer protection casing 110, and the ventilation area 111 is disposed on the side surface of the outer protection casing 110, the heat dissipation fan 500 is started, because, the suction force generated when the heat dissipation fan 500 operates sucks the hot air in the space between the outer protective shell 110 and the inner protective shell 120 out of the lithium battery protection casing 100, and simultaneously sucks the external low-temperature air into the space between the outer protective shell 110 and the inner protective shell 120, thereby accelerating the air flow between the outer protective shell 110 and the inner protective shell 120, facilitating the rapid heat dissipation, avoiding the danger of explosion when the core 300 is in a high-temperature environment, vertically arranging the heat dissipation fins 220 on the heat conduction plate 210, and using the heat dissipation fins 220 to increase the heat dissipation area while supporting the outer protective shell 110 and the inner protective shell 120.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A lithium battery cell with high safety performance comprises a lithium battery protection shell (100) and a core body (300), and is characterized in that: the lithium battery protection shell (100) is composed of an outer protection shell (110) and an inner protection shell (120), the inner protection shell (120) is sleeved in an inner cavity of the outer protection shell (110), a space is formed between the outer protection shell (110) and the inner protection shell (120), the core body (300) is arranged in the cavity of the inner protection shell (120), an interlayer (121) is arranged inside the inner protection shell (120), an explosion-proof liquid (122) is filled in the interlayer (121), the inner protection shell (120) is in a folding bent shape, a heat dissipation member (200) is arranged in the space between the outer protection shell (110) and the inner protection shell (120), the heat dissipation member (200) is fixed on the outer wall of the inner protection shell (120), a ventilation area (111) is arranged at the position, located on the heat dissipation member (200), of the outer protection shell (110), and a heat dissipation fan (500) is arranged outside the lithium battery, and the heat radiating fan (500) is communicated with a space formed between the outer protective case (110) and the inner protective case (120).

2. The lithium battery cell with high safety performance of claim 1, wherein: four corners of the inner cavity of the outer protective shell (110) are provided with fixing blocks (400), and the outer corners of the inner protective shell (120) are connected with the fixing blocks (400).

3. The lithium battery cell with high safety performance of claim 1, wherein: the heat dissipation member (200) comprises a heat conduction plate (210), heat dissipation fins (220), a heat conduction filler (211) and a clamping cavity (212), wherein the heat dissipation fins (220) are provided with multiple groups, the heat dissipation fins (220) are vertically arranged on the heat conduction plate (210), the heat dissipation fins (220) are arranged on the heat conduction plate (210) side by side, the heat conduction plate (210) is fixed on the surface of the inner protection shell (120), the heat conduction plate (210) is provided with the clamping cavity (212), and the clamping cavity (212) is filled with the heat conduction filler (211).

4. The lithium battery cell with high safety performance of claim 3, wherein: the heat-conducting filler (211) adopts heat-conducting silicone grease.

5. The lithium battery cell with high safety performance of claim 1, wherein: set up the ventilation hole in ventilative district (111), and the ventilation hole is equipped with the multiunit, the inlet scoop of radiator fan (500) is located outside the ventilation hole.

6. The lithium battery cell with high safety performance of claim 1, wherein: the side surfaces of the inner protective shell (120) are provided with heat dissipation members (200).