CN217589265U

CN217589265U - Battery module

Info

Publication number: CN217589265U
Application number: CN202123313715.7U
Authority: CN
Inventors: 孙赞棠; 宁兴广
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-10-14
Anticipated expiration: 2031-12-27

Abstract

The utility model belongs to the technical field of power battery, a battery module is disclosed. This battery module can restrain the thermal runaway of battery, including module and extinguishing device, extinguishing device is including extinguishing pipe and the fire extinguishing agent of locating in the extinguishing pipe, extinguishing pipe sets up the top at the explosion-proof valve of module, and extinguishing pipe is through drawing or bending into corresponding shape according to the mode of setting of explosion-proof valve, when ambient temperature reaches the temperature of predetermineeing of extinguishing pipe, extinguishing pipe release extinguishing agent, because when battery emergence thermal runaway, the flue gas temperature that battery explosion-proof valve sprays is far higher than the temperature of predetermineeing of extinguishing pipe, set up extinguishing pipe in the top of explosion-proof valve, extinguishing device's response speed has been improved, the loss that battery thermal runaway caused has been reduced, and can realize the accurate release of extinguishing agent, improve the effective utilization of extinguishing agent.

Description

Battery module

Technical Field

The utility model relates to a power battery technical field especially relates to a battery module.

Background

At present, power battery's use is more and more popularized, wants to use power battery to replace traditional fuel power, needs to promote power battery's energy density, but the safety problem can appear in the energy density that improves power battery, for example, high energy density's power battery is in the use, because of wading, short circuit, overcharge, high temperature or collision etc. easily lead to thermal runaway, even catch fire, explode, harm passenger's life safety.

Often set up the flexible suppression pipe of a fire control usefulness among energy storage equipment such as traditional outdoor cabinet, at the intraductal gaseous medicament of putting out a fire of setting up of flexible suppression, when taking place thermal runaway, the flexible suppression pipe breaks the release medicament of putting out a fire, and the medicament of putting out a fire is put out a fire through the mode of isolated oxygen. However, the existing flexible suppression pipe is generally installed on the side wall of the outdoor cabinet body, and the fire can be extinguished only when the overall temperature in the cabinet body reaches the trigger temperature of the flexible suppression pipe, but the fire has been in place for a period of time at the moment, and the loss is large.

SUMMERY OF THE UTILITY MODEL

According to an aspect of the utility model provides a battery module can respond rapidly when the battery takes place the thermal runaway and put out a fire, and avoids the further thermal runaway of battery from the root.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery module capable of suppressing thermal runaway of a battery includes a module and a fire extinguishing device,

the fire extinguishing device comprises a fire extinguishing pipe and a fire extinguishing agent arranged in the fire extinguishing pipe, the fire extinguishing pipe is arranged above the explosion-proof valve of the module, the fire extinguishing pipe is stretched or bent into a corresponding shape according to the arrangement mode of the explosion-proof valve, and when the environment temperature reaches the preset temperature of the fire extinguishing pipe, the fire extinguishing pipe releases the fire extinguishing agent.

Optionally, the fire extinguishing agent is a liquid fire extinguishing agent.

Optionally, the fire extinguishing agent is perfluorohexanone.

Optionally, the pressure inside the fire extinguishing pipe is higher than the pressure of the external environment.

Optionally, the explosion-proof valve is arranged in a row, and the fire extinguishing pipe is arranged above the explosion-proof valve in an I-shaped structure.

Optionally, the explosion-proof valves are arranged in two parallel rows, and the fire extinguishing pipes are arranged above the explosion-proof valves in a U-shaped structure.

Optionally, the explosion-proof valves are arranged in three parallel rows, and the fire extinguishing pipes are arranged above the explosion-proof valves in an S-shaped structure.

Optionally, the fire extinguishing apparatus further comprises a fixing device, and the fire extinguishing apparatus is fixed on the module through the fixing device.

Optionally, the fixing device includes a boss portion on which the fire extinguishing pipe is placed, and a horizontal portion connected to the module.

The utility model has the advantages that:

set up the fire extinguishing pipe that is equipped with the fire extinguishing agent through the top at the module explosion-proof valve to when ambient temperature reached the temperature of predetermineeing of fire extinguishing pipe, fire extinguishing pipe can release the fire extinguishing agent, can release the fire extinguishing agent when battery emergence thermal runaway conflagration, and the solution is by the conflagration problem that battery thermal runaway leads to, avoids producing further loss, protects passenger's life safety. Because when the battery takes place the thermal runaway, the battery explosion-proof valve can break the valve and spray the flue gas, the flue gas temperature is higher and is far above the temperature of predetermineeing of fire extinguishing pipe, set up the fire extinguishing pipe in the top of explosion-proof valve, when explosion-proof valve sprays the flue gas, fire extinguishing pipe can in time respond to release extinguishing agent, and need not wait that the temperature in the whole battery package rises to the predetermined temperature of fire extinguishing pipe and just can release extinguishing agent, fire extinguishing device's response speed has been improved, and then the loss that the battery thermal runaway caused has been reduced, and because explosion-proof valve is located the battery directly over, set up fire extinguishing pipe in explosion-proof valve's top, can realize the accurate release of extinguishing agent, improve the effective utilization of extinguishing agent, and then improve the reliability of extinguishing agent work. The fire extinguishing pipe is made to form the shape of the explosion-proof valve in a stretching or bending mode, so that on one hand, the production process of the fire extinguishing pipe can be simplified, and only one fire extinguishing pipe is needed; on the other hand, the assembling process of the fire extinguishing pipe can be simplified, the assembling efficiency can be improved, and the cost can be reduced.

Drawings

Fig. 1 is a first schematic structural diagram of a battery module provided by the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a battery module according to the present invention;

fig. 4 is a schematic structural diagram three of the battery module provided by the present invention;

fig. 5 is a schematic structural diagram of the fixing device provided by the present invention.

In the figure:

100. a module; 110. an explosion-proof valve; 210. fire extinguishing pipes; 300. a fixing device; 310. a boss portion; 320. a horizontal portion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

At present, fire control is with flexible suppression pipe generally install on the lateral wall of the outdoor cabinet body of energy storage equipment, when energy storage equipment conflagration breaing out, need wait for the internal temperature of cabinet to reach the preset temperature of flexible suppression pipe, just can release the fire extinguishing agent, and the response speed of flexible suppression pipe is slower, and the loss because of the conflagration leads to is higher, moreover because the response speed of flexible suppression pipe is slow, accidents such as explosion probably take place between this.

To solve the above problem, in an embodiment of the present invention, a battery module is provided, as shown in fig. 1 and fig. 2, this battery module includes module 100 and extinguishing device, wherein, extinguishing device includes fire extinguishing pipe 210, be equipped with the fire extinguishing agent in fire extinguishing pipe 210, set up fire extinguishing pipe 210 in the top of the explosion-proof valve 110 of battery module, and form the shape that sets up corresponding to explosion-proof valve 110 through drawing or bending, can laminate the setting of explosion-proof valve 110, when ambient temperature reaches fire extinguishing pipe 210's predetermined temperature, fire extinguishing pipe 210 can explode, and then release the fire extinguishing agent, begin to put out a fire.

When the battery in the module 100 is out of control due to heat, the explosion-proof valve 110 explodes to release smoke, and the temperature of the smoke far exceeds the preset temperature of the fire extinguishing pipe 210 and the ambient temperature in the battery pack at the moment, and the fire extinguishing pipe 210 is arranged above the explosion-proof valve 110 of the module 100, so that on one hand, the fire extinguishing pipe 210 can timely respond to release of a fire extinguishing agent, and timely extinguish fire when a fire disaster is small, and the loss of the battery out of control due to heat is reduced; on the other hand, because the battery cell is located below the explosion-proof valve 110, and the rupture of the fire extinguishing pipe 210 is located at the explosion-proof valve 110, the fire extinguishing agent can be released accurately, and the fire extinguishing reliability is improved. The fire extinguishing pipe 210 is formed into a required shape by adopting a stretching or bending mode according to the arrangement mode of the explosion-proof valve 110, only one fire extinguishing pipe 210 is needed, the structure and the assembly process of the fire extinguishing pipe 210 can be simplified, the cost is reduced, and the assembly efficiency is improved.

Further, the fire extinguishing pipe 210 may be made of an organic material, and when the ambient temperature around the fire extinguishing pipe 210 reaches the melting temperature of the fire extinguishing pipe 210, the fire extinguishing pipe 210 is broken to release the fire extinguishing agent.

Further, the fire extinguishing agent may be a liquid fire extinguishing agent. In case of fire caused by thermal runaway of the lithium ion battery, the lithium ion battery has the characteristic of self-heating in the thermal runaway process, so that the temperature of the battery is continuously increased even in an oxygen-isolated environment, the battery is always in a dangerous high-temperature environment, anode and cathode materials, electrolyte and the like in the battery are combustible, and if inert gas is used as a fire extinguishing agent, once the fire extinguishing agent fails along with the prolonging of time, the battery can continuously burn at any time, and the thermal runaway of the battery cannot be fundamentally controlled. And adopt liquid fire extinguishing agent, can also vaporize and absorb the heat and cool down for the battery when isolated oxygen restraines the battery burning, and then reduce the temperature of battery to within the safe scope, avoid the fire extinguishing agent to lose efficacy at any time the back battery continues the burning because the temperature is high, solve the potential safety hazard of battery thermal runaway conflagration from the root, improve the security of passenger's taking.

Preferably, in one embodiment, the fire extinguishing agent may be perfluorohexanone, which is a clear, colorless, odorless liquid that, in the event of thermal runaway in the battery, can continue to fire; on the other hand, the heat of the battery can be vaporized and absorbed, so that the temperature of the battery is reduced, and further thermal runaway of the battery is avoided fundamentally. The perfluorohexanone has excellent environmental protection performance, avoids polluting the environment while putting out a fire, and has long atmospheric survival time and strong fire-extinguishing stability.

Preferably, the fire extinguishing agent is stored in the fire extinguishing pipe 210 in a pressurized manner, so that the pressure inside the fire extinguishing pipe 210 is higher than the pressure of the external environment, and when the temperature of the environment around the fire extinguishing pipe 210 reaches the preset temperature of the fire extinguishing pipe 210, the fire extinguishing pipe can be smoothly exploded to release the agent. The medicament is released in an explosion mode, so that the release area of the medicament can be increased, the fire extinguishing area is increased, and the aim of thoroughly extinguishing fire is fulfilled.

Further, with reference to fig. 1, in an embodiment, the explosion-proof valves 110 of the module 100 are arranged in a row, and according to the arrangement manner of the explosion-proof valves 110, the fire extinguishing pipe 210 may be an I-shaped structure, so that the fire extinguishing pipe 210 can be completely disposed above the explosion-proof valves 110, thereby increasing the response speed of the fire extinguishing pipe 210, reducing the thermal runaway loss of the battery, realizing the precise release of the fire extinguishing agent, and improving the reliability of the fire extinguishing agent.

Further, as shown in fig. 3, in another embodiment, the explosion-proof valves 110 of the module 100 are arranged in two rows, and the two rows of explosion-proof valves 110 are arranged in parallel, and accordingly, the fire extinguishing pipe 210 may be arranged in a U-shaped structure, so that the fire extinguishing pipe 210 is arranged above the explosion-proof valve 110, and the fire extinguishing pipe 210 is arranged in a U-shaped structure, so that the explosion-proof valve 110 of the module 100 can be fully covered by only installing one fire extinguishing pipe 210, thereby simplifying the assembly process, improving the assembly efficiency, and reducing the cost.

Further, as shown in fig. 4, in another embodiment, the explosion-proof valves 110 of the module 100 are arranged in 3 rows, and three rows of explosion-proof valves 110 are arranged in parallel, accordingly, the fire extinguishing pipe 210 may be arranged in an S-shape, such that the fire extinguishing pipe 210 is disposed above the explosion-proof valve 110, and the fire extinguishing pipe 210 is arranged in an S-shape structure, such that the explosion-proof valve 110 of the module 100 can be fully covered by only one fire extinguishing pipe 210, thereby simplifying the assembly process, improving the assembly efficiency, and reducing the cost.

Further, in other embodiments, the fire extinguishing pipes 210 may be provided in other shapes, and the number of the fire extinguishing pipes 210 used may be reduced as much as possible by adjusting the installation of the explosion-proof valve 110, thereby simplifying the assembly process, improving the assembly efficiency, and reducing the cost.

Preferably, the battery module further includes a fixing device 300, and the fire extinguishing device is fixed to the module 100 by the fixing device 300. The fire extinguishing apparatus is fixed by the fixing device 300, so that the fire extinguishing apparatus is prevented from falling off when the module 100 is collided or extruded, and the influence on the response speed and the working reliability of the fire extinguishing pipe 210 due to the deviation of the fire extinguishing pipe 210 from the explosion-proof valve 110 is avoided.

Preferably, as shown in fig. 5, in one embodiment, the fixing device 300 may include a protrusion 310 and a horizontal portion 320, the extinguishing tube 210 is received and connected to the protrusion 310, the horizontal portion 320 is connected to the module 100, and the extinguishing tube 210 is received in the protrusion 310, so that the extinguishing tube 210 is prevented from being pressed, the extinguishing tube 210 is protected, the extinguishing tube 210 is prevented from being exploded due to the pressing force, and the stability of the extinguishing tube 210 is ensured.

Preferably, in one embodiment, horizontal portion 320 and module 100 may be connected by welding; in another embodiment, the horizontal part 320 and the module 100 can be connected by bolts; in other embodiments, the horizontal portion 320 and the module 100 may be connected by a snap-fit connection, which may be selected according to actual requirements.

The utility model discloses a set up fire extinguishing pipe 210 above explosion-proof valve 110, on the one hand, can utilize explosion-proof valve 110 to break the characteristic that the flue gas temperature of injection is higher and is higher than fire extinguishing pipe 210's preset temperature far away when the battery takes place the thermal runaway, accelerate fire extinguishing pipe 210's response speed, and then reduce the loss that the battery thermal runaway produced, avoid the battery thermal runaway to further serious condition development; on the other hand, the fire extinguishing agent inside after the fire extinguishing pipe 210 explodes can directly act on the battery electric core, realize the accurate release of fire extinguishing agent, improve the reliability of fire extinguishing agent work for fire extinguishing efficiency. Through set up the liquid fire extinguishing agent in fire extinguishing pipe 210 for the fire extinguishing agent is when restraining battery thermal runaway conflagration, can vaporize and absorb the heat of battery electricity core, avoids the temperature of battery electricity core to further rise, and then makes when the fire extinguishing agent is invalid along with the time after, the battery electricity core also can not continue the spontaneous combustion because of itself high temperature, from the root control battery further thermal runaway. By setting the pressure in the fire extinguishing pipe 210 to be higher than the pressure of the external environment, when the ambient temperature around the fire extinguishing pipe 210 reaches the preset temperature, the fire extinguishing pipe 210 can explode instantly under the action of the pressure, the coverage range of the fire extinguishing agent is expanded, and the fire extinguishing efficiency of the fire extinguishing agent is improved.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery module capable of suppressing thermal runaway of a battery, characterized by comprising a module (100) and a fire extinguishing device,

the fire extinguishing device comprises a fire extinguishing pipe (210) and a fire extinguishing agent arranged in the fire extinguishing pipe (210), the fire extinguishing pipe (210) is arranged above an explosion-proof valve (110) of the module (100), the fire extinguishing pipe (210) is stretched or bent into a corresponding shape according to the arrangement mode of the explosion-proof valve (110), and when the environment temperature reaches the preset temperature of the fire extinguishing pipe (210), the fire extinguishing pipe (210) releases the fire extinguishing agent.

2. The battery module according to claim 1, wherein the fire extinguishing agent is a liquid fire extinguishing agent.

3. The battery module according to claim 2, wherein the fire extinguishing agent is perfluorohexanone.

4. The battery module according to claim 1, wherein the pressure inside the fire extinguishing pipe (210) is greater than the pressure of the external environment.

5. The battery module according to any one of claims 1 to 4, wherein the explosion-proof valve (110) is disposed in a row, and the fire extinguishing pipe (210) is disposed above the explosion-proof valve (110) in an I-shaped structure.

6. The battery module according to any one of claims 1 to 4, wherein the explosion-proof valves (110) are arranged in two parallel rows, and the fire extinguishing pipe (210) is arranged above the explosion-proof valves (110) in a U-shaped structure.

7. The battery module according to any one of claims 1 to 4, wherein the explosion-proof valves (110) are arranged in three parallel rows, and the fire extinguishing pipe (210) is arranged above the explosion-proof valves (110) in an S-shaped structure.

8. The battery module according to claim 1, further comprising a fixing device (300), the fire extinguishing device being fixed to the module (100) by the fixing device (300).

9. The battery module according to claim 8, wherein the fixing means (300) comprises a boss (310) and a horizontal portion (320), the fire extinguishing pipe (210) is placed on the boss (310), and the horizontal portion (320) is connected to the module (100).