CN218414775U

CN218414775U - Battery heating and heat-preserving device

Info

Publication number: CN218414775U
Application number: CN202223177519.6U
Authority: CN
Inventors: 马冠香; 徐靖; 江城; 陈柏林
Original assignee: Beijing Qingguan Technology Co ltd
Current assignee: Beijing Qingguan Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-01-31
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a battery heating heat preservation device, including following subassembly: the device comprises a protective shell, a heat preservation and insulation layer, a heating layer, a temperature sensor and a control module. This heating heat preservation device has intelligent temperature-sensing and control function, can respond to the battery temperature change in real time to utilize the unique functional unit design and the combination of self, with battery ambient temperature control in being suitable for its inside chemical reaction to go on the within range, can solve the problem that the battery performance reduces in low temperature service environment effectively, can prolong battery life simultaneously. In addition, the heating and heat-insulating device can also effectively reduce the risks of heat leakage and thermal runaway spread caused by local combustion or explosion in the battery.

Description

Battery heating and heat-preserving device

Technical Field

The invention relates to the field of battery heat preservation and insulation, in particular to a heating and heat preservation device for a power battery for an electric automobile.

Background

The power batteries for various electric vehicles are chemical batteries which provide energy by means of chemical reactions. The greatest feature of a chemical battery is that it is required that chemical reactions in the battery be able to proceed normally, which requires that the battery surroundings satisfy conditions under which the chemical reactions proceed normally, and that temperature is an important condition in these surroundings. Therefore, the battery needs to be used at a certain temperature. Therefore, in a region or time with lower temperature, especially in winter in the north, the normal use of a general battery, especially a power battery of an electric automobile, is difficult. There is a need for a device capable of efficiently preserving and insulating heat to maintain the internal temperature of the battery within a certain range, so as to ensure that the chemical reaction inside the battery can be performed normally.

Disclosure of Invention

In order to solve the above problems, the present invention provides a battery heating and heat preserving device, which comprises the following components:

the protective shell is arranged on the outer side of the shell,

a heat-preservation and heat-insulation layer,

a heating layer is arranged on the outer surface of the heating layer,

a temperature sensor is arranged at the bottom of the shell,

a control module;

wherein, the material used for the heat preservation and insulation layer is aerogel or glass fiber fabric.

The protection object of the heating and heat-preserving device is a single battery cell, a battery pack consisting of a plurality of battery cells or the protection of the battery cells and the battery pack.

The protective shell needs to meet the requirements of water resistance, impact resistance and the like so as to protect internal components and a battery cell or a battery pack from being damaged; the protective shell is provided with a hole for leading out a lead, and the hole is sealed by a non-flammable material when not used.

The heat insulation layer is used for reducing heat exchange between the protected object and the external environment. The material used by the heat preservation and insulation layer is a heat preservation and insulation material which can be made into a sheet shape or a film shape.

Wherein the aerogel material is a silica aerogel felt or a ceramic aerogel sheet.

The heat insulation layer can prolong the temperature holding time of the heating and heat insulation device when the temperature of the external use environment is low, and can isolate the external temperature when the temperature of the external use environment is high, so that the temperature inside the battery cell or the battery pack is kept within a proper temperature range. Under extreme conditions, if the temperature in the battery cell or the battery pack is too high or combustion occurs, the heat insulation layer can keep the heat generated therewith in the heating and heat insulation device, so that the risks of heat leakage and thermal runaway spread are reduced, and the safety of peripheral equipment, devices and personnel is further protected.

The heating layer is internally provided with a heating resistance wire, and heat can be generated on the heating layer by applying certain voltage to the heating resistance wire in the actual use process. Preferably, the heating layer is a thin film structure or a sheet structure. Preferably, a heat-resistant insulating layer is disposed on each of both sides of the heating layer to prevent a short circuit from occurring.

Wherein, the temperature sensor is placed between the heating layer and the protection object and is used for monitoring the temperature of the protection object in real time. The temperature sensor includes but is not limited to various thermistors, thermocouples and the like which meet the requirement of temperature measurement range, and the thermistors are preferred. The number of the temperature sensors is one or more.

The control module is an intelligent electronic management module, is connected with the temperature sensor and the heating layer, and is used for collecting and analyzing the temperature data collected by the temperature sensor and controlling the heating process of the heating layer. In the using process, the temperature range required by the normal work of the battery cell or the battery pack is input into the control module; when the temperature monitored by the temperature sensor is lower than the temperature range, starting the heating layer to heat; and when the temperature monitored by the temperature sensor is higher than the temperature range, stopping heating the heating layer.

The heating and heat-insulating device further comprises an internal filler, wherein the internal filler is used for filling a gap between the battery electric core and the heating layer or a gap inside the battery pack, and collision is prevented. The internal filler is a high thermal conductive material, and can rapidly guide heat from the heating layer into the battery cell or the battery pack. The internal filler also has the performances of nonflammability, high temperature resistance, strong plasticity and the like.

Advantageous effects

The utility model discloses have intelligent temperature-sensing and control function, can respond to the battery temperature change in real time to utilize the unique functional unit design and the combination of self, with battery ambient temperature control in being suitable for its internal chemical reaction to go on, can solve the problem that the battery performance reduces in low temperature service environment effectively, can prolong battery life simultaneously. In addition, under extreme condition, if battery electricity core or the inside high temperature of group battery or take place the burning, the utility model provides a technical scheme can make the heat that produces keep inside the device, reduces the risk that the heat leaked and thermal runaway stretchs, and then protects peripheral equipment, device and personnel's safety.

Drawings

FIG. 1 is a schematic sectional view of example 1;

FIG. 2 is a schematic sectional view of example 2;

description of reference numerals: 1. a protective housing; 2. a heat insulation layer; 3. a heating layer; 4. a temperature sensor; 5. a wire; 6. a protection object, i.e. a battery cell or a battery pack; 7. an internal filler; 8. and a control module.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the invention can be made by those skilled in the art after reading the teachings of the invention, and equivalents which do not afford inventive faculty, will also fall within the scope of the invention disclosed or claimed herein.

Example 1

As shown in fig. 1, the protection object of the heating and heat-insulating device in this embodiment is a single battery cell 6. This heating heat preservation device includes: a protective housing 1; the heat insulation layer 2 is made of aerogel felt; the heating layer 3 is of a thin film structure; a temperature sensor 4; a wire 5 of a temperature sensor and a heating layer; an inner filler 7; and a control module 8. Temperature sensor 4 is located between zone of heating 3 and battery electricity core 6, and the laminating is on battery electricity core 6. Monitoring the temperature of the battery cell 6 in real time by using the temperature sensor 4; when the temperature is too low, the heating layer 3 is heated by the control module 8, so that the temperature around the battery electric core 6 is increased. The heat insulation layer 2 is used for keeping the internal temperature and preventing external high temperature from entering the device; under extreme conditions, when the inside burning or explosion of battery also can prevent to take place, stop the heat to peripheral conduction, reduce the accident risk that probably causes, protect external device or equipment and personnel's safety.

Example 2

As shown in fig. 2, the object to be protected by the heat retention device in the present embodiment is a battery pack 6. This heating heat preservation device includes: a protective housing 1; the heat insulation layer 2 is made of aerogel felt; the heating layer 3 is of a thin film structure; a temperature sensor 4; a temperature sensor and a wire 5 of the heating layer; an inner filler 7; and a control module 8. Temperature sensor 4 is located in the middle of whole group battery, can set up one or more for the inside temperature of real-time supervision group battery, when the temperature was crossed lowly, heats zone of heating 3 via control module 8, risees the inside and peripheral temperature of group battery. The heat insulation layer 2 is used for keeping the internal temperature and preventing external high temperature from entering the device; under extreme conditions, when the inside burning or explosion of battery also can prevent to take place, stop the heat to peripheral conduction, reduce the accident risk that probably causes, protect external device or equipment and personnel's safety.

Claims

1. A battery heating and heat preservation device is characterized by comprising the following components: the device comprises a protective shell, a heat insulation layer, a heating layer, a temperature sensor and a control module; wherein, the material used for the heat preservation and insulation layer is aerogel or glass fiber fabric.

2. The battery heating and insulating device according to claim 1, wherein the protective casing has a hole for leading out a wire.

3. The battery heating and heat insulating device according to claim 1, wherein the material used for the heat insulating layer is a sheet-like or film-like heat insulating material.

4. The battery heating and thermal insulating device according to claim 1, wherein the aerogel is a silica aerogel blanket or a ceramic aerogel sheet.

5. The battery heating and heat preserving device as claimed in claim 1, wherein the heating layer is of a thin film structure or a sheet structure, and contains a heating resistance wire inside.

6. The battery heating and insulating device according to claim 1, wherein a heat-resistant insulating layer is disposed on each of both sides of the heating layer.

7. The battery heating and temperature keeping device of claim 1, wherein the temperature sensor is one or two of a thermistor and a thermocouple; the number of the temperature sensors is one or more.

8. The battery-heated thermal insulation device according to claim 1, wherein the control module is an intelligent electronic management module, and is connected with the temperature sensor and the heating layer.

9. The battery heating and thermal insulating device according to claim 1, further comprising a high thermal conductivity internal filler for internal void filling.