CN218569115U

CN218569115U - Battery pack upper shell and battery pack

Info

Publication number: CN218569115U
Application number: CN202222307218.4U
Authority: CN
Inventors: 陈保国; 刘峰; 王彬; 彭月猛; 梁宏伟
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-03-03
Anticipated expiration: 2032-08-30

Abstract

The utility model belongs to the technical field of the battery, a casing and battery package on battery package is disclosed. The upper shell of the battery pack comprises an upper shell, a heat protection plate and an explosion-proof valve. Wherein, the inner wall of the upper shell is provided with a plurality of exhaust grooves in an upward protruding way; the thermal protection plate is connected with the upper shell, a plurality of exhaust grooves and the thermal protection plate are arranged in an enclosing mode to form a plurality of flow passages, a plurality of exhaust valves are arranged on the thermal protection plate, and when thermal runaway occurs, gas can break through the exhaust valves and enter the flow passages; an explosion-proof valve is disposed on the upper housing, the explosion-proof valve being configured such that gas within the flow passage can exit the upper housing through the explosion-proof valve when the explosion-proof valve is open. The battery pack upper shell is simple in structure, convenient to install and capable of effectively controlling a thermal runaway result.

Description

Battery pack upper shell and battery pack

Technical Field

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

Background

With the development of electric vehicles, power batteries are attracting attention as core components thereof, wherein the safety performance of power batteries is the focus of attention. Aiming at the safety performance of the power battery, the thermal runaway protection of the battery becomes the key point of research and design of the industry people. At present, the design of a thermal runaway protection structure mainly focuses on the structural innovation of a lower shell, an upper shell is generally designed in a split mode with a fireproof layer, and due to the structure, the installation process is long, the process is complex, and more materials are used, so that the management cost is increased. Also, consistency of the thermal runaway results is difficult to control due to the absence of a directional exhaust interface on the upper housing.

Therefore, it is desirable to provide a battery pack upper case and a battery pack to solve the above problems.

SUMMERY OF THE UTILITY MODEL

According to the utility model discloses an aspect, the utility model provides a casing on battery package, its simple structure, the installation of being convenient for can the effective control thermal runaway result.

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

the battery package upper shell includes:

the inner wall of the upper shell is provided with a plurality of air discharge grooves in an upward protruding manner;

the heat protection plate is connected with the upper shell, a plurality of exhaust grooves and the heat protection plate are arranged in an enclosing mode to form a plurality of flow passages, a plurality of exhaust valves are arranged on the heat protection plate, and when thermal runaway occurs, gas can break through the exhaust valves and enter the flow passages;

an explosion-proof valve disposed on the upper housing, the explosion-proof valve configured such that gas within the flow passage can exit the upper housing through the explosion-proof valve when the explosion-proof valve is open.

Optionally, a plurality of reinforcing ribs are arranged on the exhaust groove.

Optionally, the reinforcing rib is arranged on the inner top wall of the exhaust groove, and an included angle is formed between the reinforcing rib and the flowing direction of the gas in the flow channel.

Optionally, the depth of the vent groove is greater than or equal to 8mm.

Optionally, an arch protruding downwards is formed between the adjacent exhaust grooves, a plurality of buckles are arranged on one of the arch and the heat protection plate, a plurality of clamping grooves are formed in the other one of the arch and the heat protection plate, the plurality of buckles are arranged in one-to-one correspondence with the plurality of clamping grooves, and one buckle is connected with one clamping groove in a clamped mode.

Optionally, the explosion-proof valve comprises:

the explosion-proof valve mounting hole is formed in the upper shell, and the shell is mounted at the explosion-proof valve mounting hole;

the filter screen, with the shell links to each other, just the filter screen shutoff explosion-proof valve mounting hole.

Optionally, a guard for protecting the filter screen, the guard comprising:

the baffle is arranged on one side, close to the flow channel, of the filter screen, and a gap is formed between the baffle and the filter screen;

the coaming is arranged around the baffle in a surrounding way, is connected with the upper shell and is hollowed.

Optionally, the explosion-proof valve is provided in plurality, and the explosion-proof valves are provided on the front panel of the upper case and/or the rear panel of the upper case.

Optionally, a controller mounting position is convexly arranged on the front panel of the upper shell, and a plug hole is arranged on the controller mounting position.

The utility model also provides a battery package, including any one of the above-mentioned technical scheme battery package on the casing.

The utility model has the advantages that:

the utility model provides a battery package upper casing, including epitheca, hot guard plate and explosion-proof valve. Through linking to each other hot guard plate and epitheca, be integrated as an organic whole with hot guard plate and epitheca, will originally need to install hot guard plate and battery package epitheca respectively and simplify to install simultaneously, shortened installation time greatly, improved the installation effectiveness, reduced technology cost.

Through setting up explosion-proof valve on the epitheca to make hot guard plate and epitheca enclose to establish and form the runner, when electric core emergence thermal runaway, the hot guard plate entering runner can be broken through to the high temperature gas of production in, and finally spout from explosion-proof valve, avoid the inside atmospheric pressure of battery package too big and the explosion, make the result after the thermal runaway takes place controllable, reduced thermal runaway's loss.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an upper case of a battery pack at a first viewing angle according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an upper case of a battery pack at a second viewing angle according to an embodiment of the present invention;

fig. 3 is an exploded view of an upper case of a battery pack according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a heat protection plate provided by an embodiment of the present invention;

fig. 5 is a partial schematic view of a cross-sectional view of a housing of a battery pack provided in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a protection component according to an embodiment of the present invention.

In the figure:

100. an upper shell; 110. an exhaust groove; 111. reinforcing ribs; 120. a flow channel; 130. a protrusion; 131. buckling; 140. an explosion-proof valve mounting hole; 150. a controller mounting location; 151. inserting holes; 200. a heat shield plate; 210. an exhaust valve; 300. an explosion-proof valve; 400. a guard; 410. a baffle plate; 420. and (4) enclosing plates.

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 related to the present invention are shown in the drawings, not all of the structures.

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

In the present 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.

The utility model provides a casing on battery package, its simple structure, the installation of being convenient for can the effective control thermal runaway result.

Specifically, as shown in fig. 1 to 6, the upper case of the battery pack includes an upper case 100, a heat shielding plate 200, and an explosion prevention valve 300. A plurality of exhaust grooves 110 are formed in the inner wall of the upper casing 100 in an upward protruding manner, in this embodiment, the exhaust grooves 110 extend along the length direction (X-axis direction in fig. 1) of the upper casing 100, and the exhaust grooves 110 are spaced along the width direction (Y-axis direction in fig. 1) of the upper casing 100. The hot guard plate 200 links to each other with epitheca 100, and a plurality of exhaust ducts 110 enclose with hot guard plate 200 and establish and form a plurality of runners 120, and gas can flow in runner 120, is equipped with a plurality of discharge valves 210 on the hot guard plate 200, and when taking place the thermal runaway, a large amount of high temperature high-pressure gas can be erupted to the electric core in the battery package, and high temperature high-pressure gas can break through discharge valve 210 just in getting into runner 120. The explosion-proof valve 300 is disposed on the upper case 100, and the gas entering the flow passage 120 can be discharged from the explosion-proof valve 300 out of the upper case 100, thereby preventing the explosion of the upper case of the battery pack caused by the excessive gas pressure in the flow passage 120.

By integrating the heat protection plate 200 on the upper case 100, the heat protection plate 200 is a part of the upper case of the battery pack, so that the installation process of the battery pack is simplified, and the installation efficiency of the battery pack is improved. Through set up the water conservancy diversion structure on above-mentioned battery package upper shell, when the battery package takes place the thermal runaway, gaseous upper shell 100 that can follow above-mentioned battery package upper shell discharges, avoids the battery package inside to take place to guarantee because of gas pressure is too big, and then the consequence takes place for effective control thermal runaway, has reduced the loss after the thermal runaway takes place.

Optionally, explosion-proof valve 300 can set up a plurality ofly, and the gas is discharged fast when taking place the thermal runaway, reduces the thermal runaway loss. In one embodiment, as shown in fig. 1, a plurality of explosion-proof valves 300 are provided on the front panel of the upper case 100 at intervals along the length direction of the front panel. In another embodiment, as shown in fig. 2, a plurality of explosion-proof valves 300 are provided on the rear panel of the upper case 100 at intervals along the length direction of the rear panel. In other embodiments, the explosion-proof valve 300 may be disposed on both the front panel and the rear panel of the upper case 100, as required.

Further, with continued reference to fig. 1 and fig. 3, a controller mounting location 150 is protruded on the front panel of the upper case 100, and the controller of the battery cell is mounted at the controller mounting location 150. The controller mounting position 150 is provided with a plug hole 151, which is convenient for the plug of the connector of the electrical appliance and the thermal management system.

Further, with continued reference to fig. 4, the plurality of exhaust valves 210 form a plurality of exhaust valve sets, each exhaust valve set being disposed opposite one of the flow channels 120, such that when the exhaust valves 210 are opened, gas can directly enter the flow channels 120. In this embodiment, the exhaust valve 210 is formed by performing a weakening process on the heat protection plate 200, so that the thickness of the heat protection plate 200 at this position is thinner than that at other positions, on one hand, under the impact of high-pressure gas, since the thickness of the exhaust valve 210 is thinner, the exhaust valve is convenient to break, and the gas is ensured to smoothly enter the flow channel 120; on the other hand, the structural design can effectively prevent gas from flowing back, so that the gas can be rapidly discharged from the upper shell 100, and the thermal runaway loss can be reduced.

Preferably, with continued reference to FIGS. 1-5, the vent slot 110 is provided with a plurality of ribs 111. Through set up strengthening rib 111 on exhaust duct 110, improved the structural strength of epitheca 100, improved the structural stability of epitheca 100, and then be favorable to improving the security performance of battery package.

Further, still referring to fig. 5, the reinforcing rib 111 is disposed on the inner top wall of the exhaust groove 110, and an included angle is formed between the reinforcing rib 111 and the flow direction of the gas in the flow channel 120, so that the reinforcing rib 111 can play a certain role in disturbing the gas, and the direct impact of the gas on the explosion-proof valve 300 is slowed down, thereby protecting the explosion-proof valve 300. In the present embodiment, the angle between the rib 111 and the flow direction of the gas in the flow channel 120 is 90 °. In other embodiments, the included angle between the reinforcing rib 111 and the flow direction of the gas in the flow channel 120 may be other, such as 45 ° and 60 °, which may be set according to actual needs.

Preferably, with continued reference to fig. 5, the depth a of the vent groove 110 is greater than or equal to 8mm, such that the height of the flow channel 120 is greater than or equal to 8mm, so that the gas can flow smoothly along the flow channel 120 under pressure.

Optionally, in this embodiment, with reference to fig. 5, a protrusion 130 protruding downward is formed between adjacent exhaust grooves 110, one of the protrusion 130 and the heat protection plate 200 is provided with a plurality of fasteners 131, the other one is provided with a plurality of slots, the plurality of fasteners 131 are arranged in one-to-one correspondence with the slots, and one fastener 131 is engaged with one slot. The clamping structure is simple, and the installation and the detachment of the heat protection plate 200 and the upper case 100 are facilitated. Of course, in other embodiments, the connection mode between the heat protection plate 200 and the upper shell 100 may be other, such as welding, bolting, etc., and may be set according to actual needs.

Further, with continued reference to fig. 3, the explosion-proof valve 300 includes a housing and a filter screen, the upper housing 100 is provided with an explosion-proof valve mounting hole 140, the housing is mounted at the explosion-proof valve mounting hole 140, and the filter screen is connected to the housing and blocks the explosion-proof valve mounting hole 140. Through setting up the filter screen, can prevent to block explosion-proof valve 300 and influence the exhaust effect of casing on the above-mentioned battery package from the impurity that mix with in the gas that explosion-proof valve mounting hole 140 department jetted, improved the reliability of casing water conservancy diversion work on the above-mentioned battery package.

Preferably, as shown in fig. 6, the battery pack upper case further includes a protection member 400 for protecting the filter net. The guard 400 includes a baffle 410 and an enclosure 420. Wherein, baffle 410 sets up with the filter screen relatively, and baffle 410 sets up in the filter screen one side that is close to runner 120, can avoid electric core to spout and explode gaseous direct impact filter screen and cause the filter screen inefficacy, has improved the hot protective effect of casing on the above-mentioned battery package. A gap is formed between the baffle 410 and the filter screen, the surrounding plate 420 is arranged around the baffle 410, the surrounding plate 420 is connected with the upper shell 100, and the surrounding plate 420 is hollowed out. Through setting up the clearance that has between baffle 410 and the filter screen, and bounding wall 420 sets to the fretwork form, can make the gaseous space entering filter screen that passes through bounding wall 420 that electric core spouts the gas of exploding, guarantees the gaseous smooth discharge that electric core spouts the exploding.

The utility model also provides a battery package, casing on foretell battery package.

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

Claims

1. Casing on the battery package, its characterized in that includes:

the air purifier comprises an upper shell (100), wherein a plurality of air exhaust grooves (110) are formed in the inner wall of the upper shell (100) in an upward protruding mode;

the heat protection plate (200) is connected with the upper shell (100), the exhaust grooves (110) and the heat protection plate (200) are arranged in an enclosing mode to form a plurality of flow passages (120), a plurality of exhaust valves (210) are arranged on the heat protection plate (200), and when thermal runaway occurs, gas can break through the exhaust valves (210) and enter the flow passages (120);

an explosion-proof valve (300) disposed on the upper case (100), the explosion-proof valve (300) being configured such that gas in the flow passage (120) can be discharged out of the upper case (100) through the explosion-proof valve (300) when the explosion-proof valve (300) is opened.

2. The upper case for battery pack according to claim 1, wherein the vent groove (110) is provided with a plurality of ribs (111).

3. The upper casing of the battery pack according to claim 2, wherein the reinforcing ribs (111) are disposed on the inner top wall of the air discharge groove (110), and the reinforcing ribs (111) are disposed at an angle to the flow direction of the gas in the flow channel (120).

4. The battery pack upper case according to claim 1, wherein the depth of the vent groove (110) is greater than or equal to 8mm.

5. The upper shell of the battery pack according to claim 1, wherein a protrusion (130) protruding downward is formed between the adjacent air vent grooves (110), one of the protrusion (130) and the heat protection plate (200) is provided with a plurality of buckles (131), the other one of the protrusion and the heat protection plate is provided with a plurality of clamping grooves, the plurality of buckles (131) and the plurality of clamping grooves are arranged in a one-to-one correspondence, and one buckle (131) is clamped with one clamping groove.

6. The battery pack upper case according to claim 1, wherein the explosion-proof valve (300) comprises:

the explosion-proof valve mounting hole (140) is formed in the upper shell (100), and the outer shell is mounted at the explosion-proof valve mounting hole (140);

the filter screen is connected with the shell and used for plugging the explosion-proof valve mounting hole (140).

7. The battery pack upper case according to claim 6, further comprising a protection member (400) for protecting the filter net, the protection member (400) comprising:

the baffle (410) is arranged opposite to the filter screen, the baffle (410) is arranged on one side of the filter screen close to the flow channel (120), and a gap is formed between the baffle (410) and the filter screen;

the surrounding plate (420) is arranged around the baffle (410), the surrounding plate (420) is connected with the upper shell (100), and the surrounding plate (420) is hollow.

8. The battery pack upper case according to any one of claims 1 to 7, wherein the explosion-proof valve (300) is provided in plurality, and the plurality of explosion-proof valves (300) are provided on a front panel of the upper case (100) and/or a rear panel of the upper case (100).

9. The upper casing of the battery pack as claimed in any one of claims 1 to 7, wherein the front panel of the upper casing (100) is provided with a controller mounting position (150) in a protruding manner, and the controller mounting position (150) is provided with a plug hole (151).

10. A battery pack, comprising the battery pack upper case according to any one of claims 1 to 9.