CN218849612U

CN218849612U - Lithium battery heating device

Info

Publication number: CN218849612U
Application number: CN202223296686.2U
Authority: CN
Inventors: 刘斌; 周彦涛; 张天明
Original assignee: Wuxi Quanyu Electronic Technology Co ltd
Current assignee: Wuxi Quanyu Electronic Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-11
Anticipated expiration: 2032-12-08

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a lithium battery heating device, which comprises a bottom plate, wherein a silica gel plate is arranged on the top surface of the bottom plate, a first epoxy plate is arranged on the top surface of the silica gel plate, a heat transfer layer is arranged on the top surface of the first epoxy plate, a heating film is arranged between the heat transfer layer and the first epoxy plate, a second epoxy plate is arranged on the top surface of the heat transfer layer, and the top surface of the second epoxy plate is configured on an electric core of a mounted lithium battery; when the lithium battery is used in practice, the silica gel plate has elasticity, so that when the lithium battery of the utility model shakes due to road bump in the conveying process, the silica gel plate can protect the lithium battery cell, and the short circuit between the lithium battery cell and the shell is avoided through the insulating property of the silica gel plate; in addition, the first epoxy plate and the second epoxy plate are arranged above and below the heating film respectively, and the first epoxy plate and the second epoxy plate can resist high temperature and resist flame, so that the lithium battery cell can be prevented from being ignited when the heating film is heated abnormally, and a lithium battery circuit is protected.

Description

Lithium battery heating device

Technical Field

The utility model relates to a lithium cell technical field, concretely relates to lithium cell heating device.

Background

Lithium batteries are widely used in two-wheeled electric vehicles and new energy vehicles due to their advantages of high stored energy density, long service life, low weight, and the like. The lithium battery is divided into positive and negative poles, as in a common lead-acid battery, wherein all lithium ions are stored in the positive pole, the negative pole is made of graphite (carbon), and an electrolyte and a diaphragm are arranged between the positive and negative poles. The discharge process of a lithium battery is a process of moving lithium ions from a negative electrode to a positive electrode, and electric energy required for operation is provided for various devices through the discharge of the lithium battery.

During the in-service use, the activity of the compound of lithium cell can be influenced to the low temperature, consequently can the self-protection let the unable normal charge-discharge of lithium cell use by the inside BMS protection shield of lithium cell when the temperature is lower, need let the lithium cell in the environment more than zero degree centigrade for a period of time that is static, perhaps heat for the lithium cell and let its temperature rise to let the lithium cell normally work in suitable temperature environment.

The traditional heating mode of the lithium battery is only to stick a heating film to a battery shell, and the heating mode has the following defects in actual use:

firstly, the electric core inside the lithium battery is not uniformly heated, and the heating efficiency is low; secondly the heating film pastes and locates the shell surface, and outside cold air forms the air convection with the heating film, and it is faster to make the inside heat dissipation of lithium cell, heating efficiency greatly reduced.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of background art, the utility model provides a lithium cell heating device, the technical problem that solve adds the hotting mask subsides when current lithium cell heating and locates lithium cell casing surface, and heating efficiency is low.

For solving the technical problem, the utility model provides a following technical scheme: lithium cell heating device, including the bottom plate, be equipped with the silica gel board on the top surface of bottom plate, be equipped with first epoxy board on the top surface of silica gel board, the top surface of first epoxy board is equipped with heat transfer layer, be equipped with the heating film between heat transfer layer and the first epoxy board, heat transfer layer's top surface is equipped with the second epoxy board, the top surface of second epoxy board is disposed in installation lithium cell electricity core.

In one embodiment, the first epoxy plate is bonded to the bottom surface of the heat transfer layer by a first adhesive layer, and the second epoxy plate is bonded to the top surface of the heat transfer layer by a second adhesive layer.

In certain embodiments, the first epoxy plate covers the heating film.

Compared with the prior art, the utility model beneficial effect who has is:

firstly, when in actual use, the utility model is arranged in the lithium battery shell, the heating film is arranged in the shell, the heat generated by the heating film can be prevented from expanding outwards, the heating efficiency is improved, and the heat transfer layer is arranged above the heating film, so that the heat transfer layer can be used for heat transfer heating of the lithium battery cell, the heating film can be prevented from directly heating the lithium battery cell when the temperature is too high and the heating function of the lithium battery can not be normally closed due to the temperature protection failure of the lithium battery, and the combustion of the cell can be avoided;

secondly, because the top surface of the bottom plate is provided with the silica gel plate with certain elasticity, when the lithium battery of the utility model is adopted and shakes due to road bump in the conveying process, the silica gel plate can protect the electric core of the lithium battery, and the silica gel plate can resist high temperature and has good insulating property, so that the short circuit between the electric core of the lithium battery and the shell can be avoided;

and finally, the first epoxy plate and the second epoxy plate are respectively arranged above and below the heating film, and the first epoxy plate and the second epoxy plate can resist high temperature and resist flame, so that the lithium battery cell can be prevented from being ignited when the heating film is heated abnormally, and a lithium battery circuit is protected.

Drawings

Fig. 1 is a schematic structural diagram of the present invention in the embodiment.

In the figure: 1. the solar cell comprises a silica gel plate, 2, a first epoxy plate, 3, a heating film, 4, a heat transfer layer, 5, a second epoxy plate, 6 and a bottom plate.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the lithium battery heating device includes a bottom plate 6, a silicon rubber plate 1 is arranged on the top surface of the bottom plate 6, a first epoxy plate 2 is arranged on the top surface of the silicon rubber plate 1, a heat transfer layer 4 is arranged on the top surface of the first epoxy plate 2, a heating film 3 is arranged between the heat transfer layer 4 and the first epoxy plate 2, a second epoxy plate 5 is arranged on the top surface of the heat transfer layer 4, and the top surface of the second epoxy plate 5 is configured on the lithium battery cell.

Wherein the bottom plate 6 may be a support plate at the bottom of the lithium battery housing. Because the shape of the shell of lithium cell differs, and the utility model discloses mainly silica gel board 1, first epoxy board 2, heating film 3, heat transfer layer 4 and second epoxy board 5 through on the bottom plate 6 protect lithium cell electricity core, consequently do not show the shell structure in figure 1, to the shell structure of difference, only need with silica gel board 1, first epoxy board 2, heating film 3, heat transfer layer 4 and second epoxy board 5 install can on the medial surface of the backup pad of shell bottom.

For two-wheeled electric motor car, because need just can carry electric motor car manufacturer through the transportation after lithium cell production is accomplished, if the road jolts in the transportation, the lithium cell takes place to rock, then makes lithium cell electricity core striking shell easily. And the silicon rubber plate 1 with certain elasticity is arranged to protect the lithium battery cell when the lithium battery transportation bumps. In addition, the silica gel plate 1 has high insulativity, and the short circuit between the lithium battery cell and the shell can be avoided through the silica gel plate 1.

When in actual use, if the lithium cell receives external force striking or other reasons influences, the short circuit burning can take place for inside the lithium cell electricity core, and through setting up first epoxy board 2 and second epoxy board 5 and utilizing first epoxy board 2 and second epoxy board 5 high temperature resistant and fire-retardant characteristic, can play the effect of isolated intensity of a fire.

Because whether the heating of heating film 3 is controlled by the BMS protection shield of lithium cell, if the BMS protection shield appears unusually, do not let heating film 3 stop heating after heating film 3 heats the temperature to the temperature that the lithium cell can normally work, under the condition that does not increase heat transfer layer 4 and second epoxy plate 5, heating film 3 can the direct heating lithium cell electricity core, lead to lithium cell electricity core high temperature, and lithium cell electricity core takes place to burn. And the utility model discloses a set up heat transfer layer 4 and carry out the heat transfer heating and can avoid this kind of condition to appear.

Specifically, in this embodiment, the first epoxy plate 2 is bonded to the bottom surface of the heat transfer layer 4 by a first adhesive layer, and the second epoxy plate 5 is bonded to the top surface of the heat transfer layer 4 by a second adhesive layer, wherein the first adhesive layer and the second adhesive layer may be high temperature tapes.

Specifically, in this embodiment, the heat transfer layer 4 is an aluminum sheet, and the aluminum sheet has a good heat conduction property, so that heat loss occurring when the lithium battery cell is heated by heat generated by the heating film 3 can be reduced.

Specifically, in the present embodiment, the first epoxy plate 2 covers the heating film 3. In actual use, the second epoxy plate 2 covers the heating film 3, so that heat generated by the heating film 3 is prevented from being emitted to the inside of the housing, and the heat emitted to the inside of the housing is partially emitted to the outside.

Specifically, in this embodiment, in order to avoid the movement of the silicone rubber plate 1 in the lithium battery case, four side surfaces of the silicone rubber plate 1 are respectively in contact with inner wall surfaces of four side walls of the lithium battery case.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the terms "connected" and "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "one end" and "the other end" merely indicate relative positional relationships, and when the absolute positional relationship of the object to be described is changed, the corresponding positional relationship is also changed accordingly. Further, the term "at least one" as used herein includes one, two or more.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. Lithium battery heating device, including bottom plate (6), its characterized in that, be equipped with silica gel plate (1) on the top surface of bottom plate (6), be equipped with first epoxy board (2) on the top surface of silica gel plate (1), the top surface of first epoxy board (2) is equipped with heat transfer layer (4), be equipped with between heat transfer layer (4) and first epoxy board (2) heating film (3), the top surface of heat transfer layer (4) is equipped with second epoxy board (5), the top surface of second epoxy board (5) is disposed in installation lithium battery electricity core.

2. The lithium battery heating device according to claim 1, wherein the first epoxy sheet (2) is bonded to the bottom surface of the heat transfer layer (4) by a first adhesive layer, and the second epoxy sheet (5) is bonded to the top surface of the heat transfer layer (4) by a second adhesive layer.

3. The lithium battery heating device according to claim 1, characterized in that the first epoxy plate (2) covers the heating film (3).

4. The lithium battery heating device as claimed in claim 1, characterized in that the heat transfer layer (4) is an aluminium sheet.