CN218827611U

CN218827611U - Battery pack with liquid cooling function and anti-pressure-release energy storage function

Info

Publication number: CN218827611U
Application number: CN202223132607.4U
Authority: CN
Inventors: 周浩; 龙刚; 陈志文; 刘建军; 陈彬; 鄢启新
Original assignee: Weisheng Energy Technology Co ltd
Current assignee: Weisheng Energy Technology Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-07
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a battery pack with liquid cooling function and pressure relief resistance for energy storage, which comprises a box body, wherein a box cover is arranged on the upper cover of the box body; the box body is tightly contacted with the box cover to form a closed space, and a cushion pad, a liquid cooling plate, a heat conducting pad, a plurality of fuses and a battery cell module electrically connected with the fuses are sequentially arranged in the closed space from bottom to top; the liquid cooling plate is provided with a liquid inlet head and a liquid outlet head; a liquid cooling pipe sealing plate respectively corresponding to the liquid inlet head and the liquid outlet head is formed on the box body, and a pressure release valve, and a positive plug connector and a negative plug connector electrically connected with the battery cell module are also arranged on the box body; the case lid intercommunication has the fire control liquid inlet tube, the fire control detection module is installed to the case lid inboard. The utility model discloses set up sealed battery package structure and set up the relief valve to prevent that the outside air from getting into the battery package and leading to it to take place secondary explosion etc. through setting up sealed battery package, regard as the fire control signal with increasing pressure sensor, make the fire control report to the police more timely.

Description

Battery pack with liquid cooling function and anti-pressure-release function for energy storage

Technical Field

The utility model relates to an electricity field especially relates to an anti pressure release of possessing liquid cooling function battery package for energy storage.

Background

With the continuous development of the application scenes of energy storage products, the energy storage market is gradually cultivated and gradually increased. The large-scale energy storage system is also increasingly applied to social production and life, the energy storage system is also developed in the directions of large-scale and high-energy storage, and meanwhile, the economy and the safety of the energy storage system gradually become the key points of attention of people. The battery performance has the barrel effect in the energy storage system, and when the voltage of a single string is too low or the capacity is too low, the overall performance of the energy storage system is influenced. Therefore, the energy storage system puts higher consistency requirements on the battery in application. In the existing energy storage system, because of the difference problem of the battery consistency in the use process of the battery, the fault of the energy storage system also happens occasionally, and the temperature has the greatest influence on the battery consistency in the use process. How to achieve battery system temperature field homogenization in the use process of the energy storage system is an effective method for solving the battery consistency of the energy storage system.

At present, methods and measures for controlling the temperature of the battery in the market still use the power battery of the electric automobile, the mainstream temperature equalization modes in the market are mainly divided into active temperature equalization and passive temperature equalization, and specific measures comprise liquid cooling, air cooling, heat dissipation of a cold plate, natural cooling of a phase change material or a battery system and the like. In the passive temperature equalization mode, the natural equalization effect of the battery system is poor, and the effect of uniformizing the temperature of the whole battery cannot be achieved. The active temperature equalization includes liquid cooling, air cooling or phase change materials and other main measures. At the present stage, the air-cooled battery pack adopts an open or semi-open design scheme, the battery pack does not have good air tightness, the blocking effect cannot be realized when the battery is out of control, and the thermal out-of-control expansion is easily caused when the thermal out-of-control occurs in a single box; meanwhile, the air cooling system conducts heat in a radiation heat dissipation mode, so that the heat conduction efficiency is low, the energy consumption is relatively high, and in addition, the automatic power off is difficult when the heat of the conventional battery pack is too high, so that the thermal runaway is more and more serious, and finally dangerous conditions such as explosion and the like are caused.

In addition, current battery package exists and sets up fire-fighting equipment, sprays the fire extinguishing agent when the battery package internal temperature is too high, but current battery package for the ease of fire extinguishing agent gets into usually non-sealed setting, and the outside air gets into in addition when leading to spraying the fire extinguishing agent, leads to reducing to put out a fire and is efficiency reduction. In addition, the existing fire fighting sensor usually adopts a temperature or smoke sensor to alarm, but when smoke exists, the battery starts to burn, the alarm has certain hysteresis, and the problem that the detection is not timely due to the fact that the temperature sensor is far away from a heat source is often caused only.

Therefore, how to improve the structure of the energy storage battery pack to ensure the uniform temperature and safe operation of the battery core is an urgent problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an possess anti pressure release of liquid cooling function battery package for energy storage. The purpose of the utility model is realized through the following technical scheme:

a battery pack with a liquid cooling function and anti-pressure-release energy storage function comprises a box body, wherein a box cover is arranged on the upper cover of the box body; the box body is tightly contacted with the box cover to form a closed space, and a cushion pad, a liquid cooling plate, a heat conducting pad, a plurality of fuses and a battery cell module electrically connected with the fuses are sequentially arranged in the closed space from bottom to top; the liquid cooling plate is provided with a liquid inlet head and a liquid outlet head; a liquid cooling pipe sealing plate corresponding to the liquid inlet head and the liquid outlet head respectively is formed on the box body, and a pressure release valve, and a positive plug connector and a negative plug connector electrically connected with the battery cell module are further arranged on the box body; the case lid intercommunication has the fire control liquid inlet tube, the fire control detection module is installed to the case lid inboard.

Further improvement, electric core module electricity is connected with the copper tablet.

In a further improvement, the fire detection module includes a temperature sensor, a smoke sensor, and a pressure sensor.

In a further improvement, the periphery of the box body and the box cover is provided with a convex edge, an elastic sealing gasket is fixed on the convex edge, a plurality of through holes are formed in the convex edge and the elastic sealing gasket, and a bolt penetrates through the through holes to fix the box body and the box cover.

In a further improvement, the pressure relief range of the pressure relief valve is 0.1MPa-1MPa.

In a further improvement, the box body 1 is also provided with a BMU communicator, a BMU maintenance cover and a fire-fighting communicator.

The beneficial effects of the utility model reside in that:

1. the battery pack structure is sealed, and the pressure release valve is arranged, so that the battery pack is prevented from secondary explosion caused by the fact that outside air enters the battery pack.

2. Through setting up sealed battery package to increase pressure sensor and smoke transducer and regard as the fire control signal, make the fire control report to the police more timely.

3. The liquid cooling structure is arranged, so that the heat of the battery cell can be taken away in time, and the liquid cooling structure can be converted into a preheating structure to preheat the battery cell in winter to increase the discharge efficiency of the battery cell

4. The fuse is arranged, so that the thermal runaway electric core can be powered off in time, and the fire is prevented from spreading.

Drawings

The present invention is further explained by using the attached drawings, but the content in the attached drawings does not constitute any limitation to the present invention.

Fig. 1 is a schematic diagram of the explosion structure of the present invention;

fig. 2 is a schematic view of the overall structure of the present invention.

Wherein, box 1, case lid 2, blotter 3, liquid cooling board 4, heat conduction pad 5, a plurality of fuses 6, electric core module 7, inlet head 8, go out liquid head 9, liquid cooling pipe fitting shrouding 10, anodal plug connector 11, negative pole plug connector 12, relief valve 13, fire control detection module 14, copper tablet 15, protruding edge 16, elastic seal pad 17, BMU communicator 18, BMU maintenance lid 19, fire control communicator 20, fire control liquid inlet tube 21.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.

Example 1

The utility model provides an anti pressure release of possessing liquid cooling function battery package for energy storage, wherein after the positive negative pole connector of battery connects external line in figure 1, when external charging and discharging, electric core carries out the in-process of charging and discharging, produce electrochemical reaction in the electric core, the release heat, carry out heat transfer and then the heat is taken away to the coolant liquid by single electric core bottom through the heat conduction pad as in figure 2, form a circulation work system of liquid cooling system, can heat the coolant liquid through the liquid cooling host computer when cold weather or region, let the coolant liquid come to preheat the electric core and flourish the inside chemical molecule of electric core, let electric core charge-discharge efficiency improve.

When a local single battery core is abnormal and thermal runaway is generated, the fuse fuses to cut off the power of the corresponding battery core, the fuse is prevented from continuing to heat up, meanwhile, a fire-fighting sensor (a temperature sensor, a smoke sensor and a pressure sensor) in the battery pack can transmit a signal to an external control circuit through fire-fighting communication, the electromagnetic valve is used for controlling the on-off of a fire-fighting pipeline, a fire-fighting agent is accurately sprayed into the battery pack generating the thermal runaway from a fire-fighting spray head, thermal runaway suppression is carried out, after the internal thermal runaway is relieved, because a battery pack box body has good air tightness, when the internal air pressure of the battery pack is increased, after a limit value is reached, flammable and explosive gas in the battery pack can be actively discharged through a pressure release valve in the figure 1, meanwhile, external air is prevented from entering the battery pack to prevent the flammable and explosive gas from bringing secondary damage in the battery pack box body, and a circulating work system of a fire-fighting system can be formed in the battery pack.

Wherein, because electric core intensification can lead to the battery package air pressure to carry out the fire control through three kinds of sensors of temperature sensor, smoke transducer and pressure sensor and detect to prevent that electric core is overheated, and temperature sensor distance too far leads to the condition that can not in time report to the police. More specifically, the pressure sensor can detect the increase of the air pressure in the battery pack in unit time, and when the increase in unit time is larger than a preset threshold value, the temperature abnormality of the battery cell is shown, and at the moment, fire alarm can be performed.

In addition, this battery package difference traditional energy storage battery package has liquid cooling system and fire control system, and the liquid cooling system can effectively dispel the heat and reduce electric core temperature, lets electric core temperature reach the homogeneity, also can preheat for the battery, makes charge-discharge efficiency higher, and the fire control system can restrain the harm that electric core thermal runaway brought, can reduce the incident that the battery package brought.

It should be finally noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A battery pack with a liquid cooling function and anti-pressure-release energy storage function comprises a box body (1), and is characterized in that a box cover (2) is arranged on the upper cover of the box body (1); the box body (1) is in close contact with the box cover (2) to form a closed space, and a cushion pad (3), a liquid cooling plate (4), a heat conducting pad (5), a plurality of fuses (6) and a battery cell module (7) electrically connected with the fuses (6) are sequentially arranged in the closed space from bottom to top; the liquid cooling plate (4) is provided with a liquid inlet head (8) and a liquid outlet head (9); a liquid cooling pipe fitting sealing plate (10) corresponding to the liquid inlet head (8) and the liquid outlet head (9) is formed on the box body (1), and a pressure release valve (13) and a positive connector (11) and a negative connector (12) electrically connected with the battery cell module (7) are further installed on the box body (1); case lid (2) intercommunication has fire-fighting liquid inlet tube (21), fire control detection module (14) are installed to case lid (2) inboard.

2. The liquid-cooled anti-decompression energy storage battery pack with the liquid cooling function according to claim 1, wherein the battery core module (7) is electrically connected with a copper plate (15).

3. The liquid-cooled anti-decompression energy storage battery pack having the liquid cooling function as claimed in claim 1, wherein the fire detection module (14) comprises a temperature sensor, a smoke sensor and a pressure sensor.

4. The battery pack with the liquid cooling function and the anti-pressure-release energy storage function as claimed in claim 1, wherein the case body (1) and the case cover (2) are formed with a convex edge (16) at the periphery, an elastic sealing gasket (17) is fixed on the convex edge (16), a plurality of through holes are formed on the convex edge (16) and the elastic sealing gasket (17), and bolts penetrate through the through holes to fix the case body (1) and the case cover (2).

5. The liquid-cooled anti-pressure-release energy storage battery pack with the liquid cooling function as claimed in claim 1, wherein the pressure release range of the pressure release valve (13) is 0.1Mpa-1Mpa.

6. The battery pack with liquid cooling function and anti-pressure-release function for energy storage according to claim 1, wherein the BMU communicator (18), the BMU maintenance cover (19) and the fire-fighting communicator (20) are further installed on the box body (1).