CN217788699U

CN217788699U - Battery box and battery pack

Info

Publication number: CN217788699U
Application number: CN202221645567.0U
Authority: CN
Inventors: 黄伟才
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-11-11
Anticipated expiration: 2032-06-28

Abstract

The utility model belongs to the technical field of the battery, specifically disclose a battery box and battery package, be equipped with a plurality of installation positions in this battery box, every installation position corresponds battery module of installation, corresponds every installation position on the end backplate of battery box and is equipped with gas vent and exhaust passage, and the gas vent passes through exhaust passage and all communicates in total exhaust outlet, and pressure release mouth on total exhaust outlet and the lateral wall of battery box communicates. When a certain battery module takes place the thermal runaway, in a large amount of gas can enter into exhaust passage via the gas vent of the installation position in storehouse that this battery module corresponds, then collect total exhaust outlet through exhaust passage, outside later discharging the battery box through the pressure release mouth, avoided taking place interlocking thermal runaway between the adjacent battery module, guaranteed user of service's safety. The utility model provides a battery pack, including a plurality of battery module to and above-mentioned battery box, the security performance of this battery pack is good.

Description

Battery box and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery box and battery package.

Background

In traditional battery package design process, the exhaust passage in the battery box generally directly communicates and forms a whole, when thermal runaway appears in certain electric core of certain battery module in the battery box, the adjacent electric core of high temperature flame direct initiation easily that accompanies the production produces thermal runaway, chain reaction appears, lead to inside electric core violent combustion of whole battery package, other spare parts even ignite, produce the explosion, dangerous phenomena such as vehicle ignite, the security performance is relatively poor, and when thermal runaway appears in the electric core in the battery package, the explosion-proof valve of electric core is washed away, a large amount of gas is released from electric core inside along with flame, because lack independent exhaust passage with gas and flame etc. derive the battery package, gas and flame can stretch out everywhere in the battery package, hardly ensure that gas is in time discharged to the battery package outside through explosion-proof valve from the position of thermal runaway electric core smoothly, can's safety can't be guaranteed to the user.

Therefore, a battery box and a battery pack are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery box and battery package, the battery module in its battery box all corresponds and is equipped with independent exhaust passage, and when electric core in the battery module takes place the thermal runaway, gaseous can derive through independent exhaust passage, avoids adjacent battery module to produce chain thermal runaway, and the security performance is good.

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

in one aspect, the utility model provides a battery box for a plurality of battery module of installation, the battery box includes:

the frame is internally provided with a partition, and the end part of the partition is connected with the inner side wall of the frame; and

the bottom guard plate, the lower terminal surface of frame with the up end of bottom guard plate is connected and is formed the accommodation space, the lower terminal surface that cuts off with the up end of bottom guard plate is connected, the wall will the accommodation space is separated for a plurality of installation positions, every the installation position corresponds one the battery module, it is every to correspond on the bottom guard plate the installation position is equipped with gas vent and exhaust passage, the gas vent passes through exhaust passage all communicates in total exhalant outlet, the lateral wall of frame is equipped with the pressure release mouth, the lower terminal surface of frame is equipped with the trompil, the trompil intercommunication total exhalant outlet with the pressure release mouth.

Optionally, a groove is formed in the upper end face of the bottom protection plate in each installation bin, an exhaust space is enclosed by the groove and the lower end face of the battery module, and the exhaust space is communicated with the exhaust port.

Optionally, the diapire of recess is upwards protruding to be equipped with a plurality of T types protruding, the T type is protruding to include head end and tail end, the head end orientation the frame sets up, just the up end part of head end with the lower terminal surface of frame is connected, the up end of tail end with the lower terminal surface of battery module is connected, the T type is protruding will exhaust space partition is for a plurality of subspaces, and is adjacent the T type is bellied form between the head end the gas vent.

Optionally, the battery module includes electric core and tray, the electric core is installed in the tray, the bottom of electric core is equipped with the relief valve, correspond on the tray the position of relief valve is equipped with the locating hole, the locating hole with exhaust space communicates.

Optionally, a sealing element is arranged between the tray and the frame and between the tray and the partition, the upper end face of the sealing element is connected with the tray in a sealing manner, and the lower end face of the sealing element is connected with the frame and the partition in a sealing manner.

Optionally, the exhaust passages corresponding to each battery module are mutually independent.

Optionally, the battery box includes an explosion-proof valve mounted on the pressure relief vent.

Optionally, the pressure relief port with the explosion-proof valve all is equipped with a plurality ofly, just the pressure relief port with the explosion-proof valve one-to-one sets up.

Optionally, the bottom guard plate and the frame, and the bottom guard plate and the partition are all welded.

On the other hand, the utility model provides a battery pack, including a plurality of battery module to and the battery box in the above-mentioned arbitrary scheme, the battery module is installed in the battery box.

The utility model has the advantages that:

the utility model provides a battery box, this battery box is used for installing a plurality of battery modules, the battery box includes frame and end backplate, the frame is connected with end backplate and is formed the accommodation space, the inside of frame is equipped with the wall, the wall separates the accommodation space for a plurality of installation positions in storehouse, every installation position in storehouse corresponds battery module of installation, it is equipped with gas vent and exhaust passage to correspond every installation position in storehouse on the backplate in end, the gas vent all communicates in total exhalant outlet through exhaust passage, the pressure release mouth intercommunication of total exhalant outlet and the lateral wall of frame.

When a certain battery module takes place thermal runaway, in a large amount of gas can enter into exhaust passage via the gas vent of the installation position in storehouse that this battery module corresponds, then collect total exhaust outlet through exhaust passage, later outside through the pressure release mouth exhaust battery box, because every battery module all corresponds and is equipped with corresponding independent gas vent, so can not take place interlocked thermal runaway between the adjacent battery module, guaranteed user of service's safety.

On the other hand, the utility model provides a battery pack, including a plurality of battery module to and above-mentioned battery box, the battery module is installed in the battery box, and the battery module in this battery pack all corresponds and is equipped with independent exhaust passage, and can be smoothly with the inside a large amount of gas of battery module out of control in time discharge the battery box outside through the pressure release mouth, when making certain battery module take place the thermal runaway, can not ignite other battery modules, the security performance is good.

Drawings

Fig. 1 is an exploded view of a battery box provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery box provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a frame provided in an embodiment of the present invention;

fig. 4 is a top view of a bottom shield provided in an embodiment of the present invention;

fig. 5 is a partial enlarged view of a portion a in fig. 4.

In the figure:

100. a battery module; 110. an electric core; 120. a tray; 200. a frame; 210. separating; 220. a pressure relief port; 230. opening a hole; 300. a bottom guard plate; 310. an exhaust port; 320. a main exhaust outlet; 330. a groove; 340. t-shaped bulges; 3401. a head end; 3402. a tail end; 350. an exhaust passage; 400. a seal member; 500. an explosion-proof valve.

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 otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; 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 as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning 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 be limiting.

As shown in fig. 1 to 3, the present embodiment provides a battery box, a plurality of battery modules 100 are installed in the battery box, the battery box includes a frame 200 and a bottom guard plate 300, a lower end surface of the frame 200 is connected with an upper end surface of the bottom guard plate 300 to form an accommodating space, a partition 210 is installed inside the frame 200, an end portion of the partition 210 is connected with an inner side wall of the frame 200, a lower end surface of the partition 210 is connected with an upper end surface of the bottom guard plate 300, the partition 210 partitions the accommodating space into a plurality of installation positions, one battery module 100 is correspondingly installed in each installation position, an air outlet 310 and an air exhaust channel 350 are installed on the bottom guard plate 300 corresponding to each installation position, the air outlets 310 are all communicated with a main air outlet 320 through the air exhaust channel 350, a pressure relief opening 220 is installed on an outer side wall of the frame 200, an opening 230 is installed on a lower end surface of the frame 200, and the opening 230 is communicated with the main air outlet 320 and the pressure relief opening 220.

It should be noted that, referring to fig. 4 and fig. 5, the exhaust channels 350 corresponding to each battery module 100 are independent from each other, the gas generated by the thermal runaway of the battery cell can be exhausted through the corresponding exhaust channel 350, and the gas inside the exhaust channel 350 is not easy to escape, so that the gas can be smoothly exhausted out of the battery box through the exhaust channel 350. When a certain battery module 100 in the battery box is out of thermal runaway, a large amount of gas generated inside the battery module 100 can enter the independent exhaust channel 350 through the exhaust port 310 of the installation position corresponding to the battery module 100, then the gas is collected to the main exhaust outlet 320 through the exhaust channel 350, and then the gas is exhausted outside the battery box through the pressure relief port 220.

As an alternative, with continued reference to fig. 2 and 4, a groove 330 is formed in the upper end surface of the bottom protection plate 300 in each installation bin, the upper end surface of the groove wall of the groove 330 is connected with the lower end surface of the battery module 100 and encloses an exhaust space, and the exhaust space is communicated with the exhaust port 310, so that a large amount of gas generated when the battery module 100 is out of thermal runaway can release a part of pressure in the exhaust space, and then is exhausted out of the battery box through the exhaust port 310 and the exhaust channel 350. More preferably, the exhaust space and the exhaust passage 350 may be filled with inert gas such as nitrogen or helium, so as to achieve better flame retardant effect.

Further, the bottom wall of the groove 330 is provided with a plurality of T-shaped protrusions 340 in an upward protruding manner, each T-shaped protrusion 340 comprises a head end 3401 and a tail end 3402, the head end 3401 is arranged towards the frame 200, the upper end face of the head end 3401 is connected with the lower end face of the frame 200, the upper end face of the tail end 3402 is connected with the lower end face of the battery module 100, the T-shaped protrusions 340 separate an exhaust space into a plurality of subspaces, each subspace is relatively independent, each subspace corresponds to one or more rows of battery cells 110 in the battery module 100, so that the battery cells 110 in the battery module 100 are divided into a plurality of groups, an exhaust port 310 is formed between the head ends 3401 of the adjacent T-shaped protrusions 340, and in the same battery module 100, each exhaust port 310 is communicated with the corresponding exhaust channel 350.

Exemplarily, the T-shaped protrusions 340 in this embodiment are provided with 6, the exhaust space is divided into 7 subspaces by 6T-shaped protrusions 340, each subspace corresponds to 2 rows of electric cells 110, each two rows of electric cells 110 are a group, when a thermal runaway occurs to an electric cell 110 in a certain group, the gas inside the certain group flows into the exhaust channel 350 through the corresponding exhaust port 310 of the subspace, and is then exhausted through the total exhaust outlet 320, the electric cells 110 in the adjacent subspaces do not affect each other, the spreading of gas or flame inside the battery module 100 is avoided, and the damage degree of the battery module 100 is reduced.

With reference to fig. 1, the battery module 100 includes a battery cell 110 and a tray 120, the battery cell 110 is installed in the tray 120, a pressure release valve is disposed at the bottom of the battery cell 110, a positioning hole is disposed on the tray 120 corresponding to the pressure release valve, and the positioning hole is communicated with a subspace of the exhaust space. When electric core 110 takes place thermal runaway, the relief valve of electric core 110 bottom is opened, and gaseous passing through the relief valve discharges, later in getting into the subspace through the locating hole, gets into exhaust passage 350 through the gas vent 310 that the subspace corresponds, discharges outside the battery box through total exhaust outlet 320 at last. In some embodiments, the battery cell 110 may be fixed in the tray 120 through a structural adhesive, the tray 120 is filled with the structural adhesive to fix the battery cell 110, and a sealing effect is achieved at the same time, it should be noted that the structural adhesive is not disposed at the position of the positioning hole at the bottom of the tray 120, so as to ensure that the pressure release valve at the bottom of the battery cell 110 can be communicated with the exhaust space. Of course, in other embodiments, the battery cell 110 may also adopt other fixing schemes, and this embodiment does not limit this.

Further, a sealing element 400 is arranged between the tray 120 and the frame 200 and between the tray and the partition 210, the upper end surface of the sealing element 400 is connected with the tray 120 in a sealing manner, and the lower end surface of the sealing element 400 is connected with the frame 200 and the partition 210 in a sealing manner, so that good air tightness of an exhaust space is ensured, and other parts are prevented from being easily ignited.

As an optional solution, the battery box in this embodiment further includes an explosion-proof valve 500, the explosion-proof valve 500 is mounted on the pressure relief opening 220, and the explosion-proof valve 500 plays a role in exhausting and relieving pressure. Further, the pressure relief ports 220 and the explosion-proof valve 500 are provided in plurality, and the pressure relief ports 220 and the explosion-proof valve 500 are arranged in one-to-one correspondence. In the present embodiment, 4 pressure relief ports 220 and 4 explosion-proof valves 500 are provided. Of course, in other embodiments, the number of the pressure relief ports 220 and the number of the explosion-proof valves 500 may be other, as long as the pressure relief ports 220 and the explosion-proof valves 500 are ensured to be in one-to-one correspondence, which is not described herein.

Further, backplate 300, frame 200 and wall 210 all adopt aluminium material to make in this embodiment, backplate 300 and frame 200, and backplate 300 and wall 210 can adopt full welding welded connection, thereby reach sealed effect, guarantee that exhaust space's seal is good, and aluminium material can not burn, design exhaust passage 350 in the enclosure space that backplate 300 and frame 200 constitute, can avoid flame and the inside other combustible substance contact of battery package to lead to the aggravation burning.

The utility model also provides a battery pack, including a plurality of battery module 100, and above-mentioned battery box, battery module 100 installs in the battery box, and battery module 100 in this battery pack all corresponds and is equipped with independent exhaust passage 350, and can be smoothly with the inside a large amount of gas of battery module 100 out of control in time discharge the battery box outside through pressure release mouth 220 through this exhaust passage 350, when making certain battery module 100 take place the thermal runaway, can not ignite other battery module 100, the security performance is good.

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. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or 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 box for mounting a plurality of battery modules (100), the battery box comprising:

the frame (200), the inside of the frame (200) is provided with a partition (210), and the end part of the partition (210) is connected with the inner side wall of the frame (200); and

end backplate (300), the lower terminal surface of frame (200) with the up end of end backplate (300) is connected and is formed the accommodation space, cut off the lower terminal surface of (210) with the up end of end backplate (300) is connected, cut off (210) will the accommodation space separates for a plurality of installation positions in storehouse, every the installation position in storehouse corresponds one battery module (100), it is equipped with gas vent (310) and exhaust passage (350) to correspond every on end backplate (300) the installation position in storehouse, gas vent (310) pass through exhaust passage (350) all communicate in total exhaust outlet (320), the lateral wall of frame (200) is equipped with pressure release mouth (220), the lower terminal surface of frame (200) is equipped with trompil (230), trompil (230) intercommunication total exhaust outlet (320) with pressure release mouth (220).

2. The battery box according to claim 1, characterized in that the upper end face of the bottom guard plate (300) in each mounting bin is provided with a groove (330), the groove (330) and the lower end face of the battery module (100) enclose an exhaust space, and the exhaust space is communicated with the exhaust port (310).

3. The battery box of claim 2, wherein the bottom wall of the groove (330) is provided with a plurality of T-shaped protrusions (340) in an upward protruding manner, each T-shaped protrusion (340) comprises a head end (3401) and a tail end (3402), the head end (3401) faces the frame (200), the upper end face of the head end (3401) is connected with the lower end face of the frame (200), the upper end face of the tail end (3402) is connected with the lower end face of the battery module (100), the exhaust space is divided into a plurality of sub-spaces by the T-shaped protrusions (340), and the exhaust port (310) is formed between the head ends (3401) of the adjacent T-shaped protrusions (340).

4. The battery box according to claim 2, characterized in that the battery module (100) comprises a battery core (110) and a tray (120), the battery core (110) is installed in the tray (120), a pressure relief valve is arranged at the bottom of the battery core (110), a positioning hole is arranged on the tray (120) corresponding to the pressure relief valve, and the positioning hole is communicated with the exhaust space.

5. The battery box according to claim 4, characterized in that a sealing member (400) is arranged between the tray (120) and the frame (200) and the partition (210), the upper end face of the sealing member (400) is connected with the tray (120) in a sealing manner, and the lower end face of the sealing member (400) is connected with the frame (200) and the partition (210) in a sealing manner.

6. The battery box according to any one of claims 1-5, characterized in that the exhaust passages (350) of each battery module (100) are independent of each other.

7. A battery box according to any of claims 1-5, characterized in that the battery box comprises an explosion-proof valve (500), the explosion-proof valve (500) being mounted on the pressure relief opening (220).

8. The battery box according to claim 7, characterized in that a plurality of the pressure relief ports (220) and the explosion-proof valves (500) are provided, and the pressure relief ports (220) and the explosion-proof valves (500) are provided in one-to-one correspondence.

9. The battery box according to any one of claims 1-5, characterized in that the bottom guard plate (300) and the frame (200), and the bottom guard plate (300) and the partition (210) are all welded.

10. A battery pack, characterized in that it comprises a number of battery modules (100), and a battery box according to any one of claims 1-9, in which the battery modules (100) are mounted.