CN218569116U - Battery package apron and battery package - Google Patents

Abstract

The utility model provides a battery package apron and battery package relates to battery technology field, this battery package apron is including the encapsulation apron, put out a fire tube sheet and fire extinguishing tank, the inboard of encapsulation apron is used for corresponding with electric core, the tube sheet setting of putting out a fire is in the outside of encapsulation apron, the tube sheet of putting out a fire has the passageway of putting out a fire, the passageway of putting out a fire is used for switching on with the inboard space of encapsulation apron under electric core thermal runaway state, the fire extinguishing tank is connected with the tube sheet of putting out a fire, and be used for to the passageway of putting out a fire sprays fire extinguishing agent under the state that the inboard space of passageway of putting out a fire and encapsulation apron switched on. Because the tube sheet of putting out a fire and jar all set up in the outside, can not occupy the inner space of battery package for the jar that goes out a fire can do bigger, promote the dose of fire extinguishing agent, promote the fire control effect. Compared with the prior art, the utility model discloses can realize inhibiting the heat of battery package and stretch the effect betterly, lower to installation space's requirement simultaneously, do not occupy the inner space of battery, and the dose of fire extinguishing agent is sufficient, and fire-extinguishing effect is good.

Description

Battery package apron and battery package

Technical Field

The utility model relates to a battery technology field particularly, relates to a battery package apron and battery package.

Background

In recent years, new energy automobiles are rapidly developed, and with the continuous increase of the electric quantity and the quantity of electric automobiles, the safety of the new energy automobiles is also more noticed. Thermal runaway of batteries, which is the most serious failure mode of electric vehicles, has become the focus of research of various battery manufacturers. Although the internal lithium ion power battery has many advantages such as high energy density and long service life, the phenomenon of fire and explosion is easily caused by overcharge, overdischarge, short circuit, mechanical collision and the like in the using process, and even the life safety of passengers is threatened, so that the problem of thermal runaway spread of the battery pack becomes a key for restricting the development of the electric automobile.

Aiming at the problem of thermal runaway spread of a battery pack, common products on the market at present are mainly solved from two directions: in one direction, various fireproof and heat-insulating materials are added between the battery core and the battery core, between the battery module and the module and between the battery module and the box cover, and the mode has large occupied space, low energy density of the battery and complex assembly process; the other direction is to increase extinguishing device in the battery package, blocks the heat of out of control electricity core through spraying fire extinguishing agent and spreads, but the extinguishing device of this mode sets up usually in the battery package, and battery package inner space is limited, leads to the fire extinguishing dosage of storing not enough, the pressure of putting out a fire scheduling problem, and fire control effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery package apron and battery package, for example, its heat that can realize restraining the battery package well stretchs the effect, and is lower to installation space's requirement simultaneously, does not occupy the inner space of battery, and fire control effect is good.

The embodiment of the utility model discloses a can realize like this:

in a first aspect, the utility model provides a battery package apron, including encapsulation apron, the tube sheet of putting out a fire and jar of putting out a fire, the inboard of encapsulation apron is used for corresponding with electric core, the tube sheet setting of putting out a fire is in the outside of encapsulation apron, the tube sheet of putting out a fire has the passageway of putting out a fire, the passageway of putting out a fire be used for under the electric core thermal runaway state with the inboard space of encapsulation apron switches on, the jar of putting out a fire with the tube sheet of putting out a fire is connected, and be used for the passageway of putting out a fire with the state that the inboard space of encapsulation apron switched on down to the passageway of putting out a fire sprays fire extinguishing agent.

In an optional implementation manner, a via hole is formed in the package cover plate in a penetrating manner, the via hole is used for being arranged corresponding to the explosion-proof valve of the battery cell, the fire extinguishing tube plate is attached to the outer side surface of the package cover plate and is plugged on the via hole, and the via hole is used for being communicated with the fire extinguishing channel in a thermal runaway state of the battery cell.

In an optional embodiment, a blasting indentation is further disposed in an area, corresponding to the conducting hole, of the fire extinguishing tube plate, and the blasting indentation is used for breaking in a thermal runaway state of the cell, so that the conducting hole is communicated with the fire extinguishing channel.

In an alternative embodiment, the blast indentation and the via hole are each waisted.

In an optional embodiment, the conducting hole is a plurality of, the fire extinguishing tube plate includes collecting pipe and a plurality of shunt tubes, and a plurality of shunt tubes distribute in the both sides of collecting pipe, and a plurality of the shunt tubes all with the collecting pipe intercommunication, the collecting pipe with the jar of extinguishing fire is connected, every the shunt tubes all the shutoff is in a plurality of on the conducting hole.

In an optional embodiment, a sealant layer is disposed at the bottom of each of the shunt tubes, and each of the shunt tubes is attached to the surface of the package cover plate in a sealing manner through the sealant layer.

In an optional implementation manner, the fire extinguishing tube plate is integrally arranged on the outer side surface of the encapsulation cover plate, the inner side surface of the encapsulation cover plate is provided with a plurality of blasting areas, each blasting area is arranged corresponding to the fire extinguishing tube plate, the thickness of the encapsulation cover plate located in each blasting area is smaller than that of the encapsulation cover plate located in the other areas, so that the blasting areas form blasting grooves, and the blasting grooves are used for breaking in the cell thermal runaway state, so that the inner space of the encapsulation cover plate is communicated with the fire extinguishing channel.

In an optional embodiment, the battery pack cover plate further includes a sensor and a control valve, the control valve is disposed on the injection port of the fire extinguishing tank, the sensor is disposed at an edge of the fire extinguishing tube plate and is used for detecting the pressure inside the fire extinguishing channel, and the control valve is used for opening when the pressure inside the fire extinguishing channel reaches a preset value, so that the injection port and the fire extinguishing channel are communicated.

In a second aspect, the present invention provides a battery pack, including holding box, battery module and as in any one of the preceding embodiments battery pack apron, the battery module sets up in the holding box, just the holding box has a confession the opening that the battery module was packed into, the encapsulation apron lid is established on the opening, and with the holding box is connected.

In an optional implementation manner, the battery module includes a plurality of battery packs, the plurality of battery packs are all installed in the accommodating box, a heat insulation frame is arranged between every two adjacent battery packs, and the heat insulation frame is used for isolating the two adjacent battery packs.

The utility model discloses beneficial effect includes, for example:

the utility model provides a battery package apron sets up the tube sheet of putting out a fire through the outside at the encapsulation apron to the tube sheet of putting out a fire has the passageway of putting out a fire, and the passageway of putting out a fire can switch on with the inboard space of encapsulation apron when electric core thermal runaway, and the tube sheet of putting out a fire simultaneously is connected with the jar of putting out a fire, and the jar of putting out a fire can spray fire extinguishing agent to the passageway of putting out a fire when the inboard space of passageway and encapsulation apron of putting out a fire switches on, realizes putting out a fire. Because the tube sheet of putting out a fire and jar all set up in the outside of encapsulation apron, so can not occupy the inner space of battery package to make the bigger that the jar of putting out a fire can do, promote the dose of fire extinguishing agent, promote the fire control effect. And the assembly is simple, and the energy density of the battery pack is not influenced. Compared with the prior art, the utility model discloses can realize inhibiting the heat of battery package and stretch the effect betterly, lower to installation space's requirement simultaneously, do not occupy the inner space of battery, and the dose of fire extinguishing agent is sufficient, and fire-extinguishing effect is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a battery pack cover plate according to a first embodiment of the present invention at a first viewing angle;

FIG. 2 is a schematic view of the package cover of FIG. 1;

FIG. 3 is a schematic view showing the connection structure of the fire extinguishing tube plate of FIG. 1;

fig. 4 is a schematic structural view of a battery pack cover plate according to a second embodiment of the present invention;

fig. 5 is an exploded schematic view of a battery pack cover plate according to a first embodiment of the present invention;

fig. 6 is a schematic structural view of a battery pack according to a second embodiment of the present invention;

fig. 7 is an exploded schematic view of a battery pack according to a second embodiment of the present invention.

Icon: 100-a battery pack cover plate; 110-a package cover plate; 111-via holes; 130-fire extinguishing tube sheet; 131-blasting indentation; 133 a manifold; 135-shunt tube; 137-sealing adhesive layer; 150-fire extinguishing tank; 170-a sensor; 190-control valve. 200-a battery pack; 210-a containing box body; 230-a battery module; 250-insulating frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

As disclosed in the background art, there are generally two solutions in the prior art to the thermal runaway propagation problem of a battery pack. The first is to add the fireproof and heat-insulating material inside the battery pack, namely, add various fireproof and heat-insulating materials between the battery core and the battery core, between the battery module and the battery module, and between the battery module and the case cover. The second is that a fire extinguishing device is added in the battery pack, and the thermal spread of the out-of-control battery core is blocked by spraying a fire extinguishing agent.

In any of the above modes, an additional structure needs to be added inside the battery pack, and the first mode of adding the heat insulating material can increase the volume of the whole battery pack, reduce the energy density of the battery, and complicate the assembly process. The second mode then leads to the storage jar of fire extinguishing agent less because the battery package inner space is limited, and then makes the dose of fire extinguishing agent not enough, influences the pressure of putting out a fire and puts out a fire the precision, and fire control effect is not ideal.

In order to solve the problem, the utility model provides a battery package apron and battery package, its heat that can realize inhibiting the battery package better spreads the effect, and is lower to installation space's requirement simultaneously, does not occupy the inner space of battery, and fire control effect is good. It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

First embodiment

Referring to fig. 1 to 5, the present embodiment provides a battery pack cover plate 100 for covering a battery module 230, and the battery pack cover plate 100 can better achieve the effect of suppressing the heat spreading of a battery pack 200, and has low requirements for installation space, does not occupy the internal space of the battery, and has a good fire extinguishing effect.

The battery package apron 100 that this embodiment provided, including encapsulation apron 110, the tube sheet 130 of putting out a fire and jar 150 of putting out a fire, the inboard of encapsulation apron 110 is used for corresponding with electric core, the tube sheet 130 of putting out a fire sets up the outside at encapsulation apron 110, the tube sheet 130 of putting out a fire has the passageway of putting out a fire, the passageway of putting out a fire is used for switching on with the inboard space of encapsulation apron 110 under electric core thermal runaway state, the jar 150 of putting out a fire is connected with tube sheet 130 of putting out a fire, and be used for at the state that the passageway of putting out a fire switches on with the inboard space of encapsulation apron 110 to the passageway of putting out a fire injection fire extinguishing agent.

In this embodiment, battery package apron 100 is used for the lid to establish in electric core top, and the passageway of putting out a fire can switch on with the inboard space of encapsulation apron 110 when electric core thermal runaway, and the tube sheet 130 of putting out a fire is connected with the jar 150 that puts out a fire simultaneously, and the jar 150 that puts out a fire can spray the fire extinguishing agent to the passageway of putting out a fire when the inboard space of passageway of putting out a fire and encapsulation apron 110 switches on, realizes putting out a fire. Because the fire extinguishing tube plate 130 and the fire extinguishing tank 150 are both arranged outside the packaging cover plate 110, the internal space of the battery pack 200 is not occupied, and the fire extinguishing tank 150 can be made larger, so that the dosage of the fire extinguishing agent is increased, and the fire extinguishing effect is improved. And is simple to assemble without affecting the energy density of the battery pack 200.

In this embodiment, a through hole 111 is formed through the package cover plate 110, the through hole 111 is used for being disposed corresponding to an explosion-proof valve of a cell, the fire extinguishing tube plate 130 is attached to the outer side surface of the package cover plate 110 and is sealed on the through hole 111, and the through hole 111 is used for being communicated with a fire extinguishing channel in a thermal runaway state of the cell. Through setting up conducting hole 111, can play the guide effect when thermal runaway for flame or heat switch on to the passageway of putting out a fire rapidly through conducting hole 111, trigger the action of putting out a fire, and utilize extinguishing tank 150 and the passageway of putting out a fire to put out a fire. Of course, in other preferred embodiments of the present invention, the fire extinguishing tube plate 130 may be directly disposed on the package cover plate 110 without providing the through hole 111, and the expanded gas or flame generated during thermal runaway may burst through the package cover plate 110 to reach the fire extinguishing passage.

It should be noted that, in this embodiment, the fire extinguishing tube plate 130 is attached to the corresponding position of the through hole 111 in a sealing manner, so that the thermal runaway flame can further burst to the fire extinguishing passage through the through hole 111. Meanwhile, the fire extinguishing tank 150 is a high pressure tank body in which a fire extinguishing agent having a certain pressure is stored, and the kind of the fire extinguishing agent may be water, carbon dioxide, nitrogen or other inert gas/fire extinguishing solution. Moreover, the fire extinguishing tank 150 may be fixed to the outer wall surface of the lower case of the battery pack 200, or may be mounted to the end of the entire vehicle and connected to the fire extinguishing tube plate 130.

In this embodiment, the package cover plate 110 is formed by a stamping process and has an upward stamping structure, a flange is disposed around the stamping region, and bolt mounting holes are dug in the flange, so that the package cover plate 110 is conveniently connected to the accommodating box 210 through bolts. The material of the package cover 110 may be steel, aluminum alloy, plastic, SMC, or the like.

In this embodiment, the fire extinguishing tube plate 130 is further provided with a bursting indentation 131 in an area corresponding to the conducting hole 111, and the bursting indentation 131 is configured to rupture in a cell thermal runaway state, so that the conducting hole 111 is communicated with the fire extinguishing channel. Specifically, the thickness of the fire extinguishing tube plate 130 at the burst indentation 131 is thin, so that flame or expanding gas can be preferentially burst to the fire extinguishing channel from the burst indentation 131, and before burst, the position of the burst indentation 131 is in a sealed state, so that the inside of the battery pack 200 can be prevented from being communicated with the fire extinguishing channel under normal conditions, and the phenomenon of fire extinguishing mistakenly touching is avoided.

In the present embodiment, the burst indentation 131 and the via hole 111 are both in a kidney-round shape. Specifically, the bottom surface of each attention-sharing pipe is provided with a plurality of waist-shaped blasting indentations 131, each blasting indentation 131 is groove-shaped, and the size of each blasting indentation 131 is slightly smaller than that of each via hole 111, so that the expansion pressure can be further increased, and the blasting indentations 131 can be smoothly broken. Meanwhile, the blasting indentation 131 enables the area to become relatively weak, and the area can be broken through after the battery core is out of control due to heat.

In other preferred embodiments of the present invention, the blasting indentation 131 may also be a cross-shaped indentation, which can also play a role of reducing the thickness, thereby facilitating the directional blasting.

In this embodiment, the conducting holes 111 are plural, the fire extinguishing tube plate 130 is hollow and includes a collecting pipe and plural dividing pipes 135, the plural dividing pipes 135 are distributed on both sides of the collecting pipe, and the plural dividing pipes 135 are all communicated with the collecting pipe, the collecting pipe is connected with the fire extinguishing tank 150, and each dividing pipe 135 is plugged on the plural conducting holes 111. Specifically, through setting up a plurality of shunt tubes 135, can be sealed with laminating respectively all over the conducting hole 111 on the encapsulation apron 110 to can have pertinence to put out a fire the action, for example fire appears in one of them conducting hole 111 department, only need corresponding shunt tube 135 to conduct and put out a fire can, can not put out a fire through all shunt tubes 135, make to put out a fire more have pertinence, the precision of putting out a fire is higher.

In this embodiment, a sealant layer 137 is disposed at the bottom of each shunt tube 135, and each shunt tube 135 is hermetically attached to the surface of the package cover plate 110 through the sealant layer 137. Specifically, the sealant layers 137 are annular and surround the plurality of via holes 111 therein, so that the via holes 111 are prevented from being directly communicated with the external space, and the airtightness of the inside of the battery pack 200 is ensured. Meanwhile, the sealant layer 137 may be a high temperature resistant sealant, which does not easily come unstuck even if thermal runaway occurs, and ensures that the fire extinguishing agent in the shunt tube 135 can be smoothly sprayed into the battery pack 200 through the conduction hole 111 to extinguish fire.

In other preferred embodiments of the present invention, the fire extinguishing tube plate 130 can be integrally disposed on the outer surface of the encapsulating cover plate 110, and the inner surface of the encapsulating cover plate 110 has a plurality of blasting areas, each blasting area is corresponding to the fire extinguishing tube plate 130, the thickness of the encapsulating cover plate 110 located in the blasting area is smaller than the thickness of the encapsulating cover plate 110 located in other areas, so that the blasting area forms a blasting groove, and the blasting groove is used for breaking under the thermal runaway state of the battery cell, so that the inner space of the encapsulating cover plate 110 is connected to the fire extinguishing channel. That is, the weak area for explosion is formed by the thickness variation of the packing cover plate 110 itself, so that the gas or flame expanded at the time of thermal runaway can rapidly reach the weak point and burst into the fire extinguishing passage.

It should be noted that the battery pack cover plate 100 in this embodiment further includes a sensor 170 and a control valve 190, the control valve 190 is disposed on the injection port of the fire extinguishing tank 150, the sensor 170 is disposed on the edge of the fire extinguishing tube plate 130 for detecting the pressure inside the fire extinguishing passage, and the control valve 190 is configured to open when the pressure inside the fire extinguishing passage reaches a preset value, so as to conduct the injection port and the fire extinguishing passage. Specifically, the sensors 170 may be a plurality of pressure sensors 170, the sensors 170 are respectively disposed in the shunt pipes 135 and serially connected through a wire, when a pressure value detected by one of the sensors 170 exceeds a standard, it is indicated that a fire occurs in the corresponding shunt pipe 135, at this time, the fire extinguishing tank 150 may be directly opened through the control valve 190, and the high-pressure fire extinguishing agent in the fire extinguishing tank 150 can rapidly reach a thermal runaway position through the return pipe and the shunt pipe 135 to extinguish a fire.

In this embodiment, the end of the collecting pipe is further provided with a connector, the fire extinguishing tank 150 is provided with a connector, and the connector is connected with the control valve 190, the connector and the fire extinguishing tank 150. Meanwhile, each shunt tube 135 is further provided with a mounting hole, and the sensors 170 are mounted in the mounting holes in a one-to-one correspondence manner, wherein the number of the shunt tubes 135 can be consistent with the number of the battery modules 230 in the battery pack 200, so that accurate prevention and control are realized.

Here, the fire extinguishing pipe plate 130 may be made of plastic such as PC, PBT, PP, or aluminum alloy.

The connection relationship of the battery pack cover plate 100 provided in this embodiment is as follows: the bottom of the shunt tube 135 is connected with the packaging cover plate 110 through a sealant layer 137, the connection port of the shunt tube is connected with the control valve 190, the switching port and the fire extinguishing tank 150, and each connection part is coated with sealant to ensure the sealing performance. The sensor 170 is mounted on the mounting hole of the shunt tube 135 and is connected to the control valve 190 by a wire. After a certain battery cell in the battery pack 200 is out of control due to heat, the explosion-proof valve of the battery cell is opened, and flame is ejected from the explosion-proof valve, passes through the via hole 111 on the package cover plate 110, and breaks the explosion indentation 131 on the shunt tube 135. At this time, the air pressure in the fire extinguishing passage changes instantaneously, that is, the air pressure in the shunt tube 135 rises, the sensor 170 arranged on the shunt tube 135 transmits a signal to the control valve 190, the control valve 190 opens after receiving the signal, the fire extinguishing agent in the fire extinguishing tank 150 is sprayed out to reach the ignition point position, the flame is extinguished quickly, and the effect of inhibiting the thermal spread is achieved.

To sum up, the utility model provides a battery package apron 100 sets up the tube sheet 130 of putting out a fire through the outside at encapsulation apron 110 to the tube sheet 130 of putting out a fire has the passageway of putting out a fire, and the passageway of putting out a fire can switch on with encapsulation apron 110's inboard space when electric core thermal runaway, and the tube sheet 130 of putting out a fire simultaneously is connected with the cupping 150 that puts out a fire, and cupping 150 can be to the channel of putting out a fire injection fire extinguishing agent of putting out a fire when the inboard space of passageway of putting out a fire and encapsulation apron 110 switches on, realizes putting out a fire. Because the fire extinguishing tube plate 130 and the fire extinguishing tank 150 are both arranged on the outer side of the packaging cover plate 110, the inner space of the battery pack 200 is not occupied, the fire extinguishing tank 150 can be made larger, the dosage of the fire extinguishing agent is increased, and the fire extinguishing effect is improved. And is simple to assemble without affecting the energy density of the battery pack 200. Compare in prior art, this embodiment can realize inhibiting the thermal-arrest effect that spreads of battery package 200 better, and is lower to the requirement of installation space simultaneously, does not occupy the inner space of battery, and the dose of fire extinguishing agent is sufficient, and fire control effect is good.

Second embodiment

Referring to fig. 6 and 7, the present embodiment provides a battery pack 200, which includes a housing case 210, a battery module 230 and a battery pack cover plate 100, wherein the basic structure and principle of the battery pack cover plate 100 and the generated technical effects are the same as those of the first embodiment, and for the sake of brief description, reference may be made to corresponding contents in the first embodiment where no part is mentioned in the present embodiment.

The battery pack 200 that this embodiment provided, including holding box 210, battery module 230 and battery package apron 100, including encapsulation apron 110, fire extinguishing tube board 130 and fire extinguishing pot 150, the inboard of encapsulation apron 110 is used for corresponding with electric core, fire extinguishing tube board 130 sets up the outside at encapsulation apron 110, fire extinguishing tube board 130 has the passageway of putting out a fire, the passageway of putting out a fire is used for switching on with the inboard space of encapsulation apron 110 under electric core thermal runaway state, fire extinguishing pot 150 is connected with fire extinguishing tube board 130, and a state that is used for switching on to the passageway of putting out a fire to the fire extinguishing agent under the inboard space of fire extinguishing passage and encapsulation apron 110. The battery module 230 is disposed in the accommodating case 210, the accommodating case 210 has an opening for the battery module 230 to be inserted into, and the cover plate 110 covers the opening and is connected to the accommodating case 210.

In this embodiment, the battery module 230 includes a plurality of battery packs, the plurality of battery packs are all installed in the accommodating box 210, and a heat insulation frame 250 is disposed between every two adjacent battery packs, and the heat insulation frame 250 is used for isolating the two adjacent battery packs. Specifically, the height of the heat insulation frame 250 is high, so that the plurality of battery packs can be forcibly separated, and the heat spreading between the battery packs can be further effectively reduced, thereby further improving the effect of the battery pack 200 on suppressing the heat spreading.

The assembly process of the battery pack 200 provided in this embodiment is as follows: the receiving case 210 is prepared, the battery module 230 and other components are sequentially mounted in the receiving case 210, and the package cover 110 is fastened by bolts from the top. Finally, the fire suppression tube sheet 130 of the fire suppression system is bonded to the containment cover sheet 110 while the connections for other components of the fire suppression system, such as the sensors 170 and the fire suppression canister 150, are completed. The accommodating box 210 may be formed by stamping a metal plate or welding an aluminum alloy. The battery module 230 includes a plurality of battery packs, each of which includes cells arranged with a plurality of explosion-proof valves facing upward. After a certain electric core in the battery pack 200 is out of control due to heat, the electric core explosion-proof valve is opened, the explosion indentation 131 at the bottom of the fire extinguishing tube plate 130 can be broken by flame, at the moment, the fire extinguishing agent is sprayed out, the flame is extinguished, and meanwhile, the purpose of cooling is achieved. In addition, the heat insulation frame 250 is further disposed in the accommodating box 210 to separate the plurality of battery packs by force, so as to effectively reduce heat spreading between the battery packs and also achieve the effect of suppressing the heat spreading.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a battery package apron, its characterized in that, is including encapsulation apron (110), fire extinguishing tube board (130) and fire extinguishing tank (150), the inboard of encapsulation apron (110) is used for corresponding with electric core, fire extinguishing tube board (130) set up the outside of encapsulation apron (110), fire extinguishing tube board (130) have the passageway of putting out a fire, the passageway of putting out a fire be used for under the electric core thermal runaway state with the inboard space of encapsulation apron (110) switches on, fire extinguishing tank (150) with fire extinguishing tube board (130) are connected, and are used for the passageway of putting out a fire with the state that the inboard space of encapsulation apron (110) switches on is down to the passageway of putting out a fire sprays extinguishing agent.

2. The battery pack cover plate according to claim 1, wherein a via hole (111) is formed through the package cover plate (110), the via hole (111) is used for being arranged corresponding to an explosion-proof valve of the battery cell, the fire extinguishing tube plate (130) is attached to the outer side surface of the package cover plate (110) and is sealed on the via hole (111), and the via hole (111) is used for being communicated with the fire extinguishing channel in the thermal runaway state of the battery cell.

3. The battery pack cover plate according to claim 2, wherein the fire extinguishing tube plate (130) is further provided with a bursting indentation (131) at an area corresponding to the via hole (111), and the bursting indentation (131) is used for breaking under the thermal runaway state of the cell so as to enable the via hole (111) to be communicated with the fire extinguishing channel.

4. The battery pack cover plate according to claim 3, wherein the burst indentation (131) and the via hole (111) are each in the shape of a kidney circle.

5. The battery pack cover plate according to claim 2, wherein the through holes (111) are plural, the fire extinguishing tube plate (130) includes a manifold and a plurality of shunt tubes (135), the plurality of shunt tubes (135) are distributed on both sides of the manifold, and the plurality of shunt tubes (135) are all communicated with the manifold, the manifold is connected with the fire extinguishing pot (150), and each shunt tube (135) is plugged on the plurality of through holes (111).

6. The battery pack cover plate according to claim 5, wherein a sealant layer (137) is disposed at the bottom of each shunt tube (135), and each shunt tube (135) is sealingly attached to the surface of the package cover plate (110) through the sealant layer (137).

7. The battery pack cover plate according to claim 1, wherein the fire extinguishing tube plate (130) is integrally arranged on the outer side surface of the packaging cover plate (110), the inner side surface of the packaging cover plate (110) is provided with a plurality of blasting areas, each blasting area is arranged corresponding to the fire extinguishing tube plate (130), the thickness of the packaging cover plate (110) in each blasting area is smaller than that of the packaging cover plate (110) in the other areas, so that each blasting area forms a blasting groove, and each blasting groove is used for being broken under the thermal runaway state of the battery cell, so that the inner space of the packaging cover plate (110) is communicated with the fire extinguishing channel.

8. The battery pack cover plate according to any one of claims 1 to 7, further comprising a sensor (170) and a control valve (190), wherein the control valve (190) is disposed on the injection port of the fire extinguishing tank (150), the sensor (170) is disposed on the edge of the fire extinguishing tube plate (130) for detecting the pressure inside the fire extinguishing channel, and the control valve (190) is configured to open when the pressure inside the fire extinguishing channel reaches a preset value to conduct the injection port and the fire extinguishing channel.

9. A battery pack (200) comprising a housing case (210), a battery module (230), and a cover plate of the battery pack according to any one of claims 1 to 8, wherein the battery module (230) is disposed in the housing case (210), the housing case (210) has an opening for the battery module (230) to be inserted into, and the package cover plate (110) is disposed on the opening and connected to the housing case (210).

10. The battery pack (200) of claim 9, wherein the battery module (230) comprises a plurality of battery packs, each of the plurality of battery packs is mounted in the accommodating box (210), and a heat insulation frame (250) is disposed between every two adjacent battery packs, and the heat insulation frame (250) is used for isolating the two adjacent battery packs.

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