CN112542633B

CN112542633B - Battery device containing self-heating layer

Info

Publication number: CN112542633B
Application number: CN202011431727.7A
Authority: CN
Inventors: 高剑; 汤争耀; 周雪; 王铭
Original assignee: Homwee Technology Co ltd
Current assignee: Homwee Technology Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2022-07-12
Anticipated expiration: 2040-12-09
Also published as: CN112542633A

Abstract

The invention discloses a battery device comprising a self-heating layer. The device can utilize the exothermic reaction from the zone of heating to provide heat for the battery, makes the actual temperature of battery be higher than ambient temperature, and then improves the discharge performance of battery under the low temperature.

Description

Battery device containing self-heating layer

Technical Field

The invention relates to the technical field of batteries, in particular to a battery device comprising a self-heating layer.

Background

At present, the starting of military equipment such as tanks, tracked vehicles, armored vehicles and the like generally depends on an external alternating current-direct current conversion power supply, the lead-acid batteries of the tanks can be used for starting in emergency, but the two modes have very obvious short plates. Firstly, an alternating current-direct current conversion power supply must rely on external alternating current input, and generally obtains power input through a diesel generator set, although the weight and the volume of the equipment are not large, the maneuverability of the equipment is seriously influenced by the characteristic of the external power input, and great inconvenience is brought to field battles. The lead-acid battery equipped in the tank itself is used as an emergency starting power supply and is rarely used, and particularly in extremely cold regions (the temperature is lower than-20 ℃), the low-temperature characteristic of the lead-acid battery can not basically ensure the starting of the vehicle. At present, the low temperature resistance of the lithium ion battery can meet the conventional low temperature use environment (about-20 ℃), but the application requirement of military equipment in cold regions is still to be perfected. Therefore, it is an urgent problem to provide a low-temperature start battery that has low-temperature resistance and high reliability and can supply power to equipment for a long time.

Disclosure of Invention

In order to solve the technical problem, the invention provides a battery device comprising a self-heating layer, wherein the self-heating layer and a heat insulation layer are wrapped outside a battery, the self-heating layer can perform exothermic reaction to provide heat for the battery, and the heat insulation layer can effectively prevent heat loss so that the temperature of the battery is in a temperature range suitable for discharging.

In order to achieve the technical effects, the invention provides the following technical scheme:

the utility model provides a battery device who contains self-heating layer, the device includes battery, self-heating layer and thermal insulation layer from inside to outside in proper order.

A further technical scheme does, include reaction layer, segmentation layer and battery contact layer from the zone of heating, the battery contact layer sets up the surface at the battery, the reaction layer divide into first reaction layer and second reaction layer, first reaction layer and second reaction layer are separated through the segmentation layer, be provided with the weeping hole on the segmentation layer, with first reaction layer and second reaction layer intercommunication.

The further technical scheme is that the material of the partition layer is an aluminum plastic film or a PET film, and the material of the battery contact layer is non-woven fabric.

The further technical scheme is that a rubber boss is arranged on the reaction layer and is opposite to the liquid leakage hole, so that the reaction layer and the liquid leakage hole are closed and separated. The reaction rate can be regulated by selecting the appropriate number of bosses.

The further technical scheme is that the substance in the first reaction layer is an aqueous solution which is not solidified at ultralow temperature, and the substance in the second reaction layer can perform exothermic reaction with the substance in the first reaction layer.

The substance in the reaction layer can be a combination of acid and alkali, a combination of metal and acid, a combination of metal simple substance, oxygen and water vapor, a combination of strong base, alkaline oxide, active metal oxide and water, and a combination of oxyacid radical and water.

The further technical proposal is that the diameter of the liquid leakage hole is 0.5 mm-10 mm. The reaction rate can be controlled by selecting an appropriate pore size.

The further technical scheme is that the battery is a primary battery or a secondary battery, and the battery is square, cylindrical or soft-packaged.

The further technical scheme is that the primary battery comprises a zinc-manganese dry battery, an alkaline zinc-manganese dry battery, a zinc-mercury battery, a zinc-silver battery, a zinc-air battery and a lithium primary battery, and the secondary battery comprises a cadmium-nickel battery, a hydrogen-nickel battery, a lithium ion battery, a secondary alkaline zinc-manganese battery and a lead storage battery.

The further technical scheme is that the heat insulation layer is made of one or more of polyurethane heat insulation materials, ceramic fiber cotton materials, silica aerogel materials and vermiculite materials.

Compared with the prior art, the invention has the following beneficial effects: the self-heating layer and the heat-insulating layer are arranged on the outer side of the battery, the self-heating layer can perform exothermic reaction to provide heat for the battery, and the heat-insulating layer can effectively prevent heat loss, so that the temperature of the battery is in a temperature range suitable for discharging, and further the low-temperature (-less than-20 ℃) discharging performance of the battery is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a battery device according to the present invention;

FIG. 2 is a cross-sectional view of the self-heating layer of the present invention;

wherein, A: a battery contact layer; b: a rubber boss; c: a first reaction layer; d: dividing the layer; e: a second reaction layer; f: and (4) a liquid leakage hole.

Detailed Description

Example 1

And (3) wrapping and sticking the self-heating layer on the outer surface of a square lithium battery with the size of 50 x 30 x 4mm and the nominal capacity of 1000mAh, wherein the battery heat-insulating jacket is prepared from a polyurethane heat-insulating material. Wherein the first substance in the self-heating reaction layer is 29.9 percent calcium chloride aqueous solution, and the solidification temperature of the calcium chloride aqueous solution with the concentration is-55 ℃. The second substance is calcium oxide powder with the particle size of less than 100um. The aperture of the liquid leakage hole is 0.8mm. The mass ratio of the first substance to the second substance is 1:1, which is 20g respectively. The number of the rubber bosses facing a single large surface of the battery is 3, and the rubber bosses are uniformly distributed below the battery contact layer. And closing the rubber boss and the liquid leakage hole, putting the battery containing the self-heating layer into a low-temperature test box at the temperature of 50 ℃ below zero, standing for 2 hours, separating the rubber boss and the liquid leakage hole, starting an exothermic reaction, and testing the discharge performance.

Example 2

Example 2 differs from example 1 in that: the mass of the first substance and the second substance was 10g, respectively.

Example 3

Example 3 differs from example 1 in that: the aperture of the liquid leakage hole is 1.2mm.

Example 4

Example 4 differs from example 1 in that: the number of the rubber bosses is 4.

Example 5

Example 5 differs from example 1 in that: the second substance is sodium hydroxide powder.

Comparative example 1

Comparative example 1 differs from example 1 in that: the comparative example did not contain a self-heating layer.

The batteries of the above examples and comparative examples were subjected to measurement of surface temperature, and 0.2C discharge performance test, and the obtained data are shown in table 1.

TABLE 1 test results of examples and comparative examples

Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.

Claims

1. A battery device containing a self-heating layer is characterized by comprising a battery, the self-heating layer and a heat insulation layer in sequence from inside to outside; the self-heating layer comprises a reaction layer, a partition layer and a battery contact layer, the battery contact layer is arranged on the outer surface of the battery, the reaction layer is divided into a first reaction layer and a second reaction layer, the first reaction layer and the second reaction layer are separated through the partition layer, and the partition layer is provided with a liquid leakage hole which is communicated with the first reaction layer and the second reaction layer; the reaction layer is also provided with a rubber boss which is opposite to the position of the liquid leakage hole and realizes the closing and the separation of the rubber boss and the liquid leakage hole; the diameter of the liquid leakage hole is 0.5 mm-10 mm, the substance in the first reaction layer is an aqueous solution which is not solidified at ultralow temperature, the substance in the second reaction layer can perform exothermic reaction with the substance in the first reaction layer, the substance in the first reaction layer is a calcium chloride aqueous solution, and the substance in the second reaction layer is calcium oxide powder or sodium hydroxide powder.

2. The battery device comprising a self-heating layer according to claim 1, wherein the material of the partition layer is an aluminum plastic film or a PET film, and the material of the battery contact layer is a non-woven fabric.

3. The battery device comprising a self-heating layer according to claim 1, wherein the battery is a primary battery or a secondary battery, and the battery has a square or cylindrical shape.

4. The battery device comprising a self-heating layer according to claim 3, wherein the primary battery comprises a zinc-manganese dry cell, an alkaline zinc-manganese dry cell, a zinc-mercury cell, a zinc-silver cell, a zinc-air cell, a lithium primary battery, and the secondary battery comprises a cadmium-nickel battery, a hydrogen-nickel battery, a lithium ion battery, a secondary alkaline zinc-manganese battery, a lead storage battery.

5. The battery device comprising a self-heating layer according to claim 1, wherein the material of the thermal insulation layer is one or more of a polyurethane thermal insulation material, a ceramic fiber cotton material, a silica aerogel material, and a vermiculite material.