CN217788706U - Directional exhaust battery module, battery box and battery package - Google Patents

Abstract

The utility model belongs to the technical field of the battery, specifically disclose a directional carminative battery module, including a plurality of electric cores, tray, air discharge plate and gas collection piece, the air discharge plate sets up in the below of tray, and forms the gas storage space between air discharge plate and the tray, and the gas storage space includes a plurality of independent subspaces, and first exhaust hole and one-to-one on subspace and the tray lateral wall communicate the exhaust chamber of subspace and gas collection piece through first exhaust hole, are equipped with the gas outlet on the gas collection piece, the gas outlet with the exhaust chamber intercommunication. Subspace, first exhaust hole, exhaust chamber and gas outlet form exhaust passage, and the gas that every line of electric core produced in the battery module all discharges through the exhaust passage who corresponds, has avoided taking place heat to stretch between the electric core of adjacent line or adjacent row, and the security performance is good. The utility model also provides a battery box and battery package, including foretell directional carminative battery module, the security performance of battery box and battery package is good.

Description

Directional exhaust battery module, battery box and battery package

Technical Field

The utility model relates to a battery technology field especially relates to a directional carminative battery module, battery box and battery package.

Background

In the design process of traditional battery package, the bottom of all electric cores in the battery module communicates integratively usually, and when certain electric core in the battery module takes place the thermal runaway, the adjacent electric core of easy direct initiation produced the thermal runaway, causes chain reaction, and whole battery module all has the risk of thermal runaway, and the security performance is relatively poor. In addition, when the battery module thermal runaway appeared, a large amount of gases can be released to electricity core inside, and the inside space of battery module is less and communicate each other, can't in time lead away gas and flame, leads to it to stretch at random everywhere in the battery package, and the diffusion direction has the uncertainty, ignites other spare parts easily, causes danger.

Therefore, a battery module, a battery box and a battery pack with directional exhaust are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a directional carminative battery module, battery box and battery package are equipped with the air discharge plate in its battery module, can separate the electric core in the battery module, avoid taking place heat between the adjacent electric core and stretch, and the inside gas of electric core can be discharged battery package outside, the security performance is good from the position of electric core out of control through exhaust passage.

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

in a first aspect, the utility model provides a directional carminative battery module, this directional carminative battery module includes:

a plurality of battery cells;

the battery cell comprises a tray, a plurality of battery cells and a plurality of first exhaust holes, wherein the battery cells are all arranged in the tray, and the side wall of the tray is provided with the first exhaust holes along the height direction;

the exhaust plate is arranged below the tray, an air storage space is formed between the exhaust plate and the bottom wall of the tray, the air storage space comprises a plurality of mutually independent subspaces, and each subspace is correspondingly communicated with one first exhaust hole;

the gas collecting block is connected with the upper end face of the tray, an exhaust cavity is formed between the gas collecting block and the tray and communicated with the first exhaust hole, and a gas outlet is formed in the gas collecting block and communicated with the exhaust cavity.

Optionally, the edge of the exhaust plate extends upwards to form a flange, and the flange is connected with the tray in a sealing mode.

Optionally, the exhaust plate is provided with a plurality of connecting ribs protruding upwards, the upper end surfaces of the connecting ribs are connected with the bottom wall of the tray, and the connecting ribs divide the air storage space into a plurality of sub-spaces.

Optionally, the gas collection block includes a bottom plate and a side plate connected to the bottom plate, an end of the side plate is connected to the upper end face of the tray, the exhaust cavity is formed between the bottom plate, the side plate and the tray, and the gas outlet is disposed on the side plate or the bottom plate.

Optionally, a sealing member is arranged between the air collecting block and the tray, and an upper end surface and a lower end surface of the sealing member are respectively abutted against the air collecting block and the tray.

Optionally, the battery module capable of exhausting directionally comprises a fixing piece, a fixing hole is formed in the gas collecting block, and one end of the fixing piece penetrates through the fixing hole and then is detachably connected with the tray.

Optionally, the lower terminal surface of tray is equipped with the recess, the air discharge plate sets up in the recess, the air discharge plate with the diapire of recess is connected.

Optionally, the height of the exhaust plate is less than or equal to the depth of the groove.

Optionally, the exhaust plate is welded to the tray, and the battery cell is fixedly connected to the tray through structural adhesive.

A second aspect, the utility model provides a battery box, battery box includes the box to and the directional carminative battery module in the above-mentioned arbitrary scheme, directional carminative battery module is equipped with a plurality of, be equipped with a plurality of mounted position in the box, every be equipped with one in the mounted position directional carminative battery module.

Optionally, a second exhaust hole is formed in the side wall of the box body, an explosion-proof valve is arranged on the second exhaust hole, and the second exhaust hole is communicated with the air outlet through an air guide pipe.

Optionally, the second exhaust hole, the air duct and the explosion-proof valve are provided with a plurality of holes, and the second exhaust hole, the air duct and the explosion-proof valve are arranged in one-to-one correspondence with the battery modules exhausting in a directional manner.

The third aspect, the utility model provides a battery pack, including the battery box in any one of above-mentioned scheme.

The utility model has the advantages that:

the utility model provides a directional carminative battery module, this directional carminative battery module includes a plurality of electric cores, a tray, air discharge plate and gas collection piece, the air discharge plate sets up the below at the tray, and form a plurality of mutually independent subspaces between air discharge plate and the tray, be equipped with a plurality of first exhaust holes along its direction of height on the lateral wall of tray, subspace and first exhaust hole one-to-one set up, a first exhaust hole of every subspace intercommunication, the exhaust chamber intercommunication of first exhaust hole and gas collection piece, be equipped with the gas outlet on the gas collection piece, gas outlet and exhaust chamber intercommunication, thereby at the subspace, first exhaust hole, form relatively independent exhaust passage between exhaust chamber and the gas outlet, can separate the electric core in the battery module, avoid taking place heat spreading between the electric core of adjacent row or adjacent row, and the inside gas of electric core can be arranged the battery module outside from the position of electric core through the exhaust passage orientation, and the security performance is good.

A second aspect, the utility model provides a battery box, including box and the above-mentioned directional carminative battery module, directional carminative battery module is equipped with a plurality of, be equipped with a plurality of mounted position in the box, be equipped with a directional carminative battery module in every mounted position, directional carminative battery module passes through the second exhaust hole on air duct and the box and in time discharges the a large amount of gases that produce when can be out of control with battery module thermal, and can not influence each other between the adjacent directional carminative battery module, avoid taking place chain reaction, user of service's safety has been protected.

The third aspect, the utility model provides a battery pack, including above-mentioned battery box, the security performance of this battery pack is good, and when certain battery module of battery box took place thermal runaway, can in time lead away gas and flame, avoids it to stretch at random everywhere inside the battery pack, ignites other spare parts.

Drawings

Fig. 1 is a schematic structural diagram of a directional-exhaust battery module provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery module with directional exhaust provided in an embodiment of the present invention at another view angle;

fig. 3 is a top view of a tray provided in an embodiment of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view of section A-A of FIG. 5;

fig. 5 is a schematic structural diagram of an exhaust plate provided in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an air collection block provided in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a gas collecting block provided in an embodiment of the present invention at another viewing angle;

fig. 8 is a schematic structural diagram of a battery box provided in an embodiment of the present invention.

In the figure:

100. an electric core; 101. a pressure relief valve;

200. a tray; 201. a first through hole; 202. a first exhaust port; 203. a groove;

300. an exhaust plate; 301. a flange; 302. a subspace; 303. connecting ribs;

400. a gas collecting block; 410. a base plate; 420. a side plate; 421. an air outlet; 430. a fixing hole; 440. a seal member;

500. a fixing member;

600. structural adhesive;

700. a box body; 701. mounting position; 702. a second vent hole; 703. an explosion-proof valve;

800. an air duct.

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 limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

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; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. 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 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 in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, 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.

As shown in fig. 1 to fig. 4, the present embodiment provides a directional exhaust battery module, which includes a plurality of battery cells 100, a tray 200, and an exhaust plate 300, the plurality of battery cells 100 are all installed in the tray 200, a plurality of through first through holes 201 are formed in a bottom wall of the tray 200, the plurality of first through holes 201 are arranged in an array along a first direction and a second direction, each battery cell 100 is disposed corresponding to one first through hole 201, a plurality of first exhaust holes 202 are formed in a side wall of the tray 200 along a height direction thereof, the first exhaust holes 202 penetrate through a side wall of the tray 200, it should be noted that a diameter of the first exhaust holes 202 is smaller than a thickness of the side wall, in addition, the first direction described in the present embodiment is an X-axis direction in fig. 1 and fig. 2, the second direction is a Y-axis direction in fig. 1 and fig. 2, and a height direction of the side wall of the tray 200 is a Z-axis direction in fig. 1 and fig. 2. The exhaust plate 300 is arranged below the tray 200, a gas storage space is formed between the bottom walls of the exhaust plate 300 and the tray 200 and comprises a plurality of mutually independent subspaces 302, each subspace corresponds to and is communicated with a first exhaust hole, the gas collecting block is connected with the upper end face of the tray, an exhaust cavity is formed between the gas collecting block and the tray, the exhaust cavity is communicated with the first exhaust holes, a gas outlet is formed in the gas collecting block, and the gas outlet is communicated with the exhaust cavity.

Generally speaking, the bottom of electric core 100 all is equipped with relief valve 101, and when certain electric core 100 took place thermal runaway, the inside gas of this electric core 100 can break through relief valve 101 to enter into the subspace 302 of gas storage space through first through-hole 201, and then outside the gas storage space is discharged through first exhaust hole 202, because all do not communicate between every subspace 302, thereby form mutually independent exhaust passage between subspace 302, first exhaust hole 202, exhaust chamber and gas outlet 421. In some embodiments, the first exhaust hole 202 is disposed on the side wall of the tray 200 along the first direction, so that each row of the battery cells 100 in the battery module for directional exhaust corresponds to an independent exhaust channel, when a certain battery cell 100 is out of thermal runaway, the adjacent row of the battery cells 100 is not affected, a chain reaction between the adjacent row of the battery cells 100 in the battery module for directional exhaust is avoided, a thermal spreading tendency is controlled, and the damage degree of the battery module for directional exhaust is reduced.

It should be noted that, in this embodiment, compared with the conventional manner of forming the vent hole at the bottom of the battery module, in this embodiment, the outlet of the exhaust channel is disposed above the battery module exhausting air directionally, so that the exhaust position is far away from the center of the thermal spread, the intensity of combustion is reduced, and the effect of controlling the thermal spread is better. In order to further improve the effect of controlling the thermal spread, inert gases such as nitrogen or helium and the like can be filled in the exhaust passage, so that the oxygen content is reduced, the combustion time is shortened, and a better flame retardant effect is achieved.

In other embodiments, first exhaust hole 202 also can set up on the lateral wall of tray 200 along the second direction, at this moment, every subspace 302 corresponds a row of electric core in the carminative battery module of orientation, thereby every row of electric core 100 all corresponds an independent exhaust duct in the carminative battery module of orientation, when making certain electric core 100 take place the thermal runaway, can not influence adjacent row's electric core 100, the chain reaction takes place between the adjacent row's electric core 100 in the carminative battery module of orientation has been avoided, the trend of thermal creep has been controlled, thereby reduce the damage degree of the carminative battery module of orientation.

As an alternative solution, referring to fig. 2 and 5, a flange 301 extends upwards from the edge of the air discharge plate 300, and the flange 301 is hermetically connected with the tray 200, so that a closed air storage space between the air discharge plate 300 and the tray 200 prevents air and flame from randomly spreading around the inside of the directionally-discharged battery module.

As an optional technical scheme, the exhaust plate 300 is provided with a plurality of connecting ribs 303 protruding upwards, the upper end surfaces of the connecting ribs 303 are connected with the bottom wall of the tray 200, the end portions of the two connecting ribs 303 along the first direction are connected with the flange 301, and the air storage space can be divided into a plurality of sub-spaces 302 through the connecting ribs 303, so that adjacent rows or adjacent columns of battery cells are separated, the trend of thermal expansion is better controlled, and the safety of users is ensured. Further, the connection rib 303 in this embodiment is wavy to dodge the first through hole 201, so that the relief valve 101 can be smoothly opened.

For example, the exhaust plate 300 in this embodiment may be manufactured by stamping, and by stamping the exhaust plate 300 downward, a plurality of downward convex strip-shaped convex hulls are formed on the exhaust plate 300, the connecting rib 303 is formed between adjacent convex strip-shaped convex hulls, and the sub-space 202 is formed between the convex strip-shaped convex hulls and the bottom wall of the tray 200. Of course, in other embodiments, the exhaust plate 300 may be integrally injection-molded by a mold, which is not limited in this embodiment.

Further, referring to fig. 6 and 7, the gas collection block 400 includes a bottom plate 410 and a side plate 420 that are connected to each other, a housing structure is formed between the bottom plate 410 and the side plate 420, an opening is formed at one end of the side plate 420, an end of one side of the opening on the side plate 420 is connected with an upper end face of the tray 200, thereby forming an exhaust cavity between the bottom plate 410 and the tray 200, the exhaust cavity is communicated with upper ports of the first exhaust holes 202, and an air outlet 421 is formed on the side plate 420, the air outlet 421 is communicated with the exhaust cavity, when a certain electric core 100 is out of thermal runaway, air is discharged into the exhaust cavity of the gas collection block 400 from the first exhaust holes 202, and then is discharged out of the battery module through the air outlet 421. Of course, in other embodiments, the air outlet 421 may also be disposed on the bottom plate of the air collecting block 400, which is not limited in this embodiment.

With reference to fig. 1, in order to improve the reliability of the sealing of the exhaust cavity, a sealing member 440 is disposed between the gas collection block 400 and the tray 200, the upper end surface of the sealing member 440 abuts against the opening end of the gas collection block 400, the lower end surface of the sealing member 440 abuts against the upper end surface of the tray 200, and by means of the arrangement of the sealing member 440, the sealing performance of the exhaust cavity is ensured to be good, and the gas leakage is not easy to occur.

As an optional scheme, the battery module with directional exhaust further includes a fixing member 500, a fixing hole 430 is formed on the air collection block 400, and one end of the fixing member 500 passes through the fixing hole 430 and then is detachably connected to the tray 200. In some embodiments, the fixing member 500 may be a bolt or a screw, and the sealing member 440 may be conveniently and periodically replaced by such a detachable installation manner, so as to ensure that the sealing performance of the exhaust cavity is good.

With continued reference to fig. 2, in the present embodiment, the lower end surface of the tray 200 is provided with a groove 203, the air discharge plate 300 is disposed in the groove 203, and the flange 301 is connected to the bottom wall of the groove 203. Further, the height of the exhaust plate 300 is smaller than or equal to the depth of the groove 203, so that the exhaust plate 300 can be completely located in the groove 203 of the tray 200 and cannot protrude out of the lower end face of the tray 200, the occupied space of the exhaust plate 300 is reduced, the space utilization rate is improved, and the improvement of the energy density of the directional exhaust battery module is facilitated.

In some embodiments, the flange 301 of the air discharge plate 300 is welded to the tray 200 by full-length welding, and the connecting rib 303 is welded to the tray 200 by penetration welding, so as to ensure that the air storage space between the air discharge plate 300 and the tray 200 has good sealing performance and reliable sealing. In addition, the battery cell 100 and the tray 200 in this embodiment are fixedly connected by the structural adhesive 600, so that the fixing effect is good.

The embodiment also provides a battery box, as shown in fig. 8, which includes a box body 700 and the above-mentioned battery modules exhausting in a directional manner, the battery modules exhausting in a directional manner are provided in a plurality, a plurality of mounting positions 701 are provided in the box body 700, and one battery module exhausting in a directional manner is provided in each mounting position 701. Illustratively, the present embodiment will be described by taking four mounting positions 701 and four directionally-exhausting battery modules as an example.

In this embodiment, a second exhaust hole 702 is disposed on a side wall of the box body 700, an explosion-proof valve 703 is disposed on the second exhaust hole 702, and the second exhaust hole 702 is communicated with the air outlet 421 through an air duct 800. Form directional carminative passageway in box 700 through gas storage space, first exhaust hole 202, the exhaust chamber, air duct 800 and second exhaust hole 702 for when certain electricity core 100 takes place thermal runaway, a large amount of gas and flame can be discharged into gas collection piece 400 through corresponding gas storage space and first exhaust hole 202, later discharge from the gas vent of box 700 through air duct 800, the explosion-proof valve 703 that the gas vent department set up can play the effect of exhaust, the pressure release, air duct 800 can avoid gas and flame to stretch at random everywhere in box 700, directional carminative effect has been reached. As an alternative, a welding joint is provided at one end of the second exhaust hole 702 located at the inner side of the tray 200, and the air duct 800 is fixedly connected with the welding joint through a clamp. In some embodiments, the gas-guiding tube 800 and the gas outlet 421 of the gas-collecting block 400 can also be fixedly connected by a clip, and the fixing effect of the clip is good.

As an optional scheme, the number of the second exhaust holes 702, the number of the air guide pipes 800 and the number of the explosion-proof valves 703 are four, the second exhaust holes 702, the air guide pipes 800 and the explosion-proof valves 703 are arranged in a one-to-one correspondence with the battery modules exhausting in a fixed direction, a large amount of gas generated when the battery modules are out of control due to heat can be exhausted timely through the air guide pipes 800 and the second exhaust holes 702 in the box body 700, adjacent battery modules exhausting in a fixed direction cannot be affected mutually, chain reaction is avoided, and safety of users is protected.

This embodiment still provides a battery package, including above-mentioned battery box, this battery package's security performance is good, and when certain battery module in the battery box takes place thermal runaway, can in time lead away gas and flame, avoids it to stretch at random everywhere in the battery package, ignites other spare parts.

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 (13)

1. A directional vented battery module, comprising:

a number of cells (100);

the battery cell structure comprises a tray (200), wherein a plurality of battery cells (100) are all arranged in the tray (200), and a plurality of first exhaust holes (202) are formed in the side wall of the tray (200) along the height direction of the tray;

the exhaust plate (300) is arranged below the tray (200), a gas storage space is formed between the exhaust plate (300) and the bottom wall of the tray (200), the gas storage space comprises a plurality of mutually independent subspaces (302), and each subspace (302) is correspondingly communicated with one first exhaust hole (202);

the gas collecting block (400), the gas collecting block (400) with the up end of tray (200) is connected, gas collecting block (400) with form the exhaust chamber between tray (200), the exhaust chamber with first exhaust hole (202) intercommunication, be equipped with gas outlet (421) on gas collecting block (400), gas outlet (421) with the exhaust chamber intercommunication.

2. The vent-directed battery module of claim 1, wherein the vent plate (300) has a flange (301) extending upward from an edge thereof, and the flange (301) is sealingly connected to the tray (200).

3. The battery module with directional exhaust function as claimed in claim 2, wherein the exhaust plate (300) is provided with a plurality of connecting ribs (303) protruding upwards, the upper end surfaces of the connecting ribs (303) are connected with the bottom wall of the tray (200), and the connecting ribs (303) divide the air storage space into a plurality of sub-spaces (302).

4. The battery module of claim 1, wherein the gas collection block (400) comprises a bottom plate (410), and a side plate (420) connected to the bottom plate (410), wherein an end of the side plate (420) is connected to an upper end surface of the tray (200), the bottom plate (410), the side plate (420) and the tray (200) form the gas discharge chamber therebetween, and the gas outlet (421) is disposed on the side plate (420) or the bottom plate (410).

5. The battery module with directional exhaust according to claim 1, wherein a sealing member (440) is arranged between the gas collection block (400) and the tray (200), and an upper end surface and a lower end surface of the sealing member (440) are respectively abutted against the gas collection block (400) and the tray (200).

6. The battery module with the directional exhaust function as claimed in claim 1, wherein the battery module with the directional exhaust function comprises a fixing member (500), a fixing hole (430) is formed in the air collecting block (400), and one end of the fixing member (500) passes through the fixing hole (430) and is detachably connected with the tray (200).

7. The directional exhaust battery module according to any one of claims 1 to 6, wherein the lower end surface of the tray (200) is provided with a groove (203), the exhaust plate (300) is arranged in the groove (203), and the exhaust plate (300) is connected with the bottom wall of the groove (203).

8. The directional venting battery module according to claim 7, wherein the height of the vent plate (300) is less than or equal to the depth of the groove (203).

9. The directional exhaust battery module according to any one of claims 1 to 6, wherein the exhaust plate (300) is welded to the tray (200), and the battery cell (100) is fixedly connected to the tray (200) through a structural adhesive (600).

10. A battery box, characterized in that the battery box comprises a box body (700) and a plurality of directional-exhaust battery modules according to any one of the above claims 1-9, the directional-exhaust battery modules are provided in plurality, a plurality of mounting positions (701) are provided in the box body (700), and one directional-exhaust battery module is provided in each mounting position (701).

11. The battery box according to claim 10, characterized in that a second vent hole (702) is formed in the side wall of the box body (700), an explosion-proof valve (703) is arranged on the second vent hole (702), and the second vent hole (702) is communicated with the air outlet (421) through an air duct (800).

12. The battery box according to claim 11, characterized in that a plurality of the second exhaust holes (702), the air guide pipes (800) and the explosion-proof valves (703) are arranged, and the second exhaust holes (702), the air guide pipes (800) and the explosion-proof valves (703) are arranged in one-to-one correspondence with the battery modules exhausting in the oriented direction.

13. A battery pack comprising a battery case according to any one of claims 10 to 12.

Images