CN219832930U - Battery pack and energy storage device - Google Patents

Abstract

The utility model discloses a battery pack and energy storage equipment. The battery pack includes: a cover body; the liquid cooling plate is connected with the bottom of the cover body and is provided with a mounting hole; and the explosion-proof valve is arranged in the mounting hole and seals the mounting hole. In the battery pack, the explosion-proof valve is arranged at the mounting hole formed in the liquid cooling plate, the liquid cooling plate is connected with the bottom of the cover body, and when the explosion-proof valve is exploded, electrolyte accumulated in the liquid cooling plate can be discharged out of the battery pack, so that the situation that the electrolyte is ignited and the energy storage system is triggered to generate fire and explosion due to accumulation of the electrolyte and short-circuit ignition in the battery pack is avoided.

Description

Battery pack and energy storage device

Technical Field

The utility model relates to the technical field of energy storage, in particular to a battery pack and energy storage equipment.

Background

Along with the influence of the energy storage battery on the cycle life, the liquid level of the electrolyte in the energy storage battery pack can reach more than 96% of the total height of the battery, so that the electrolyte in the battery monomer is much stored. When the explosion-proof valve of the battery monomer is exploded, electrolyte in the battery monomer is sprayed out to accumulate in the battery pack after the explosion-proof valve of the battery monomer is exploded, and particularly when more than one battery monomer is exploded, a large amount of electrolyte in the battery pack can accumulate. When thermal runaway occurs in the battery pack, a short circuit ignition phenomenon generally occurs, and the short circuit ignition ignites electrolyte to cause ignition explosion of the battery pack, so that the whole energy storage system is induced to generate ignition explosion, and serious safety accidents are caused.

Disclosure of Invention

The embodiment of the utility model provides a battery pack and energy storage equipment.

A battery pack according to an embodiment of the present utility model includes:

a cover body;

the liquid cooling plate is connected with the bottom of the cover body and is provided with a mounting hole;

and the explosion-proof valve is arranged in the mounting hole and seals the mounting hole.

In the battery pack, the explosion-proof valve is arranged at the mounting hole formed in the liquid cooling plate, the liquid cooling plate is connected with the bottom of the cover body, and when the explosion-proof valve is exploded, electrolyte accumulated in the liquid cooling plate can be discharged out of the battery pack, so that the situation that the electrolyte is ignited and the energy storage system is triggered to generate fire and explosion due to accumulation of the electrolyte and short-circuit ignition in the battery pack is avoided.

In some embodiments, the battery pack comprises a battery cell, the cover body and the liquid cooling plate enclose a containing cavity, the battery cell is located in the containing cavity, and the bottom surface of the battery cell is connected with the liquid cooling plate.

In some embodiments, the liquid cooling plate is connected with the bottom surface of the battery cell through heat conducting glue.

In some embodiments, the liquid cooling plate is provided with a receiving groove, and the heat-conducting glue is received in the receiving groove.

In some embodiments, the explosion-proof valve comprises a body and a valve body, the body is provided with a communication channel, the communication channel comprises an air inlet and an air outlet, the air inlet is communicated with the accommodating cavity and the air outlet, and the valve body seals the air outlet;

when the valve body is jacked up by the gas from the communication channel, the accommodating cavity is communicated with the outside of the battery pack through the communication channel.

In some embodiments, the body includes a communicating portion and a holding portion, the holding portion is connected to a circumferential side surface of the communicating portion, the communicating portion is provided with the communicating channel, the communicating portion is located in the mounting hole, and the holding portion holds against an outer side surface of the liquid cooling plate.

In some embodiments, a connecting portion is provided in the communication passage, the valve body is movably connected to the connecting portion, and the valve body is capable of moving back and forth between a closed position in which the valve body seals the air outlet, and an open position in which the valve body opens the air outlet.

In some embodiments, a connecting cavity is arranged in the connecting part, a connecting hole is arranged at the bottom of the connecting cavity, and the valve body comprises a guiding part, a sealing part and an elastic piece;

the guide part is partially positioned in the connecting cavity and penetrates through the connecting hole, the elastic piece is positioned in the connecting cavity, one end of the elastic piece is connected with the guide part, and the other end of the elastic piece is connected with the inner wall of the connecting cavity;

the sealing part is connected with one end of the guiding part, which is positioned outside the connecting part, and seals the air outlet.

In some embodiments, the cover body is provided with a containing groove, the bottom of the cover body is provided with an opening of the containing groove, and the liquid cooling plate is connected with the opening of the containing groove to jointly enclose the containing cavity.

An energy storage device according to an embodiment of the present utility model includes the battery pack of any of the above embodiments.

In the energy storage equipment, the explosion-proof valve is arranged at the mounting hole formed in the liquid cooling plate, the liquid cooling plate is connected with the bottom of the cover body, and when the explosion-proof valve is exploded, electrolyte accumulated in the liquid cooling plate can be discharged out of the battery pack, so that the situation that the electrolyte is ignited and the energy storage system is triggered to generate fire and explosion due to accumulation of the electrolyte and short-circuit ignition in the battery pack is avoided.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained from the structures shown in these drawings without the need for inventive effort to a person skilled in the art.

Fig. 1 is a perspective view of a battery pack according to an embodiment of the present utility model;

fig. 2 is an exploded view of a battery pack according to an embodiment of the present utility model;

FIG. 3 is a perspective view of a liquid cooling plate according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of the liquid cooling plate A of FIG. 3;

FIG. 5 is a top view of a liquid cooling plate according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of the liquid cooling plate of FIG. 5 taken along line B-B;

fig. 7 is an enlarged view of a portion of the liquid cooling plate C of fig. 6;

fig. 8 to 9 are perspective views of a body of an explosion-proof valve according to an embodiment of the present utility model;

FIG. 10 is a top view of the body of the explosion proof valve of an embodiment of the present utility model;

fig. 11 is a perspective view of a valve body of an explosion-proof valve according to an embodiment of the present utility model;

fig. 12 is a side view of a valve body of an explosion proof valve according to an embodiment of the present utility model.

Reference numerals illustrate:

the battery pack-100, the battery cell-14, the explosion-proof valve-16, the accommodating cavity-18, the mounting hole-20, the cover body-24, the liquid cooling plate-26, the first connector-28, the second connector-30, the accommodating groove-32, the body-34, the valve body-36, the communication channel-38, the air inlet-40, the air outlet-42, the communication part-44, the abutting part-46, the connecting part-48, the connecting arm-50, the connecting cavity-52, the connecting hole-54, the guiding part-56, the sealing part-58, the elastic piece-60, the convex ring-62, the groove-63, the connecting cylinder-64, the top cover-66, the accommodating groove-68, the sealing ring-70, the connector-72 and the mounting plate 74.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 4, a battery pack 100 according to an embodiment of the present utility model includes a battery cell 14, an explosion-proof valve 16, a cover 24, and a liquid cooling plate 26. The liquid cooling plate 26 is connected to the bottom of the cover 24, and the liquid cooling plate 26 is provided with mounting holes 20. The explosion-proof valve 16 is installed in the installation hole 20 and seals the installation hole 20.

In the battery pack 100, the explosion-proof valve 16 is mounted in the mounting hole 20 formed in the liquid cooling plate 26, the liquid cooling plate 26 is connected to the bottom of the cover 24, and when the explosion-proof valve 16 is exploded, the electrolyte accumulated in the liquid cooling plate 26 can be discharged out of the battery pack 100, so that the electrolyte is prevented from being ignited due to accumulation of the electrolyte and short-circuit ignition in the battery pack 100, and the ignition and explosion of the energy storage system are induced.

Specifically, the liquid cooling plate 26 may be used as a bottom plate of the battery pack 100, the cover 24 may be used as an upper cover, the cover 24 is connected with the liquid cooling plate 26 and encloses the accommodating cavity 18 together, and the mounting hole 20 is provided in the bottom plate of the battery pack 100. The battery pack 100 may include one or more battery cells 14, and the plurality of battery cells 14 may be electrically connected in series, parallel, or series-parallel. The number, shape and electrical connection form of the battery cells 14 are not particularly limited in the present utility model. In fig. 2, the number of the battery cells 14 is two, the battery cells 14 are square, the two battery cells 14 are connected in series, and the two battery cells 14 are arranged in the left-right direction.

The battery cell 14 is supported on a liquid cooling plate 26. The explosion-proof valve 16 seals the mounting hole 20, so that the tightness of the inside of the accommodating cavity 18 can be ensured when the battery pack 100 is used normally, and the moisture and dust resistance of the battery pack 100 can be ensured.

When the battery cell 14 is out of control, the high-pressure gas in the battery cell 14 is discharged into the accommodating cavity 18 from the explosion-proof valve of the battery cell 14, the air pressure in the accommodating cavity 18 rises, the explosion-proof valve 16 on the liquid cooling plate 26 is exploded, and the high-pressure gas is discharged. When the explosion-proof valve 16 is opened, the electrolyte accumulated in the liquid cooling plate 26 can be discharged out of the battery pack 100, so that the electrolyte is prevented from being ignited due to accumulation of the electrolyte and short-circuit ignition in the battery pack 100, and the ignition and explosion of the energy storage system are induced.

In some embodiments, the bottom surface of the battery cell 14 is connected to a liquid cooling plate 26. In this way, the battery cell 14 can be ensured to operate in the normal temperature range.

Specifically, the liquid cooling plate 26 may be used as a bottom plate of the battery pack 100, an internal flow channel (not shown) is formed inside the liquid cooling plate 26, a first connector 28 and a second connector 30 are further provided on the liquid cooling plate 26, and the first connector 28 and the second connector 30 are respectively communicated with two ends of the internal flow channel, alternatively, the first connector 28 may be used as a liquid inlet connector, and the second connector 30 may be used as a liquid outlet connector. The liquid cooling unit (not shown) can be connected with the first connector 28 and the second connector 30 through pipelines, the liquid cooling unit can input low-temperature cooling liquid into the internal flow passage from the first connector 28, heat exchange is carried out between the liquid cooling unit 26 and the battery cell 14, heat is dissipated to the battery cell 14, the temperature of the cooling liquid after heat absorption is increased, the cooling liquid flows out of the internal flow passage from the second connector 30 and enters the liquid cooling unit, the liquid cooling unit cools the cooling liquid to form low-temperature cooling liquid, and the low-temperature cooling liquid is input into the internal flow passage through the first connector 28 again, so that circulation is carried out.

In some embodiments, the liquid cooling plate 26 is connected to the bottom surface of the battery cell 14 by a heat conductive adhesive (not shown).

In this way, the heat dissipation efficiency of the battery cell 14 can be improved.

Specifically, the heat-conducting glue can be attached to the bottom surfaces of the liquid cooling plate 26 and the battery cells 14, so that the gap between the liquid cooling plate 26 and the battery cells 14 is reduced, the heat transfer path can be increased, and the heat dissipation efficiency of the battery cells 14 is improved. In one example, the thermally conductive gel may be a silicone gel.

In some embodiments, the liquid cooling plate 26 is provided with a receiving groove 32, and the thermally conductive paste is received in the receiving groove 32.

Thus, the heat conduction glue can be prevented from overflowing.

Specifically, in order to ensure the heat conducting effect of the heat conducting glue, the heat conducting glue is generally required to cover the bottom surfaces of all the battery cells 14, and therefore, more heat conducting glue is generally disposed on the liquid cooling plate 26. Because the heat-conducting glue has certain fluidity, the heat-conducting glue is contained by the containing groove 32 of the liquid cooling plate 26, so that on one hand, the quantity of the heat-conducting glue on the liquid cooling plate 26 can be more, the heat dissipation efficiency is ensured, and on the other hand, the heat-conducting glue is not easy to overflow from the liquid cooling plate 26, and the cleanliness of the battery pack 100 is ensured.

In certain embodiments, referring to fig. 5-12, the explosion-proof valve 16 includes a body 34 and a valve body 36, the body 34 is provided with a communication channel 38, the communication channel 38 includes an air inlet 40 and an air outlet 42, the air inlet 40 communicates with the receiving chamber 18 and the air outlet 42, and the valve body 36 seals the air outlet 42;

when the valve body 36 is lifted by the gas from the communication passage 38, the accommodation chamber 18 is made to communicate with the outside of the battery pack 100 through the communication passage 38.

In this manner, venting and sealing may be achieved by movement of valve body 36.

Specifically, the communication passage 38 may communicate with the accommodation chamber 18 through the air inlet 40, and in a normal state, the valve body 36 seals the air outlet 42, so that the accommodation chamber 18 forms a relatively sealed space. In the event of thermal runaway of the battery cell 14, high-pressure gas may enter the communication passage 38 from the gas inlet 40 and lift up the valve body 36 sealing the gas outlet 42, and the high-pressure gas may be discharged from the gas outlet 42 to the outside of the battery pack 100.

In some embodiments, referring to fig. 7 to 9, the body 34 includes a communication portion 44 and a supporting portion 46, the supporting portion 46 is connected to a circumferential side surface of the communication portion 44, the communication portion 44 is provided with a communication channel 38, the communication portion 44 is located in the mounting hole 20, and the supporting portion 46 supports an outer side surface of the liquid cooling plate 26.

In this way, the installation of the explosion proof valve 16 is facilitated.

Specifically, the shape of the mounting hole 20 may be adapted to the shape of the communication portion 44. In the embodiment shown in fig. 7 and 8, the mounting hole 20 is a circular hole, and the communication portion 44 is cylindrical.

The communication portion 44 may be mounted in the mounting hole 20 by an interference fit. The abutting portion 46 abuts against the outer side surface of the liquid cooling plate 26, when the explosion-proof valve 16 is mounted, the communicating portion 44 is mounted in the mounting hole 20, and when the abutting portion 46 abuts against the outer side surface of the liquid cooling plate 26, the explosion-proof valve 16 is prompted to be mounted in place, and mounting of the explosion-proof valve 16 is facilitated.

In some embodiments, a connection 48 is provided within the communication channel 38, the valve body 36 is movably connected to the connection 48, and the valve body 36 is movable back and forth between a closed position, in which the valve body 36 seals the air outlet 42, and an open position, in which the valve body 36 opens the air outlet 42.

In this manner, the opening and sealing of the air outlet 42 may be achieved by the connection portion 48 movably connecting the valve body 36.

Specifically, in fig. 10, the communication passage 38 is cylindrical, and the connecting portion 48 is connected to the inner wall of the communication passage 38 in the radial direction of the communication passage 38 by two connecting arms 50, and is fixed in the communication passage 38.

Valve body 36 is movable between a closed position, in which valve body 36 seals air outlet 42, and an open position, in which chamber 18 forms a relatively sealed space. In the open position, valve body 36 opens vent 42, allowing high pressure gas to escape through vent 42 to the exterior of battery pack 100.

When the valve body 36 is lifted by the gas in the communication passage 38, the valve body 36 is in the open position, the gas outlet 42 is opened, and the high-pressure gas can be discharged to the outside of the battery pack 100 through the gas outlet 42.

In some embodiments, a connecting cavity 52 is provided in the connecting portion 48, a connecting hole 54 is provided at the bottom of the connecting cavity 52, and the valve body 36 includes a guide portion 56, a sealing portion 58, and an elastic member 60.

The guide portion 56 is partially located in the connection chamber 52 and penetrates through the connection hole 54, the elastic member 60 is located in the connection chamber 52, one end of the elastic member 60 is connected to the guide portion 56, and the other end is connected to the inner wall of the connection chamber 52. The sealing portion 58 is connected to one end of the guide portion 56 outside the connection portion 48, and the sealing portion 58 seals the air outlet 42.

In this manner, the valve body 36 may be reset from the open position to the closed position and maintained in the closed position.

Specifically, in the embodiment shown in fig. 11 and 12, the top of the guide portion 56 has a convex ring 62, and one end of the elastic member 60 abuts against the lower surface of the convex ring 62, and the other end abuts against the bottom wall of the connection chamber 52. Under normal conditions, the elastic member 60 applies upward thrust to the collar 62, causing the guide portion 56 to tighten the sealing portion 58, causing the sealing portion 58 to seal the air outlet 42.

Optionally, a groove 63 is formed at the bottom of the abutting portion 46, the shape and size of the groove 63 are matched with those of the sealing portion 58, the groove 63 can guide the moving process of the sealing portion 58, smooth movement of the sealing portion 58 is ensured, and reliability of the explosion-proof valve 16 is improved.

When thermal runaway occurs in the battery cells 14 in the battery pack 100, the air pressure in the battery pack 100 increases, and when the downward pressure of the high-pressure air to the sealing part 58 is greater than the upward thrust of the elastic member 60 to the convex ring 62, the sealing part 58 is jacked up by the high-pressure air to drive the guiding part 56 to move downward, the air outlet 42 is opened, the high-pressure air can be discharged to the outside of the battery 100 through the opened air outlet 42, at this time, the guiding part 56 compresses the elastic member 60 through the convex ring 62, and the size L is reduced. Meanwhile, since a large amount of electrolyte is sprayed out when the battery cell 14 is out of control, the electrolyte falls on the bottom of the battery pack 100, namely the liquid cooling plate 26 under the action of gravity, and at this time, the explosion-proof valve 16 is opened, and the electrolyte is discharged from the explosion-proof valve 16 under the action of high-pressure gas and gravity, so that the electrolyte is prevented from being stored in the battery pack 100, and the electrolyte is ignited to cause ignition explosion when short-circuit ignition occurs in the battery pack 100.

When the air pressure in the accommodating cavity 18 is balanced with the air pressure outside the battery pack 100, the compressed elastic member 60 drives the convex ring 62 to move upwards, so that the guiding portion 56 drives the sealing portion 58 to reseal the air outlet 42.

It will be appreciated that in other embodiments, one end of the resilient member 60 may be connected to the top of the guide 56 and the other end may be connected to the top wall of the connecting chamber 52. In a normal state, the elastic member 60 applies an upward pulling force to the guide portion 56, so that the sealing portion 58 seals the opening. When the downward pressure of the high-pressure gas on the sealing portion 58 is greater than the upward tension of the elastic member 60 on the guiding portion 56, the sealing portion 58 is lifted by the high-pressure gas to drive the guiding portion 56 to move downward, the air outlet 42 is opened, and the high-pressure gas can be discharged to the outside of the battery pack 100 through the opened air outlet 42, at this time, the guiding portion 56 stretches the elastic member 60. When the air pressure in the accommodating chamber 18 is balanced with the air pressure outside the battery pack 100, the stretched elastic member 60 pulls the guiding portion 56 to move upwards, so that the guiding portion 56 drives the sealing portion 58 to reseal the air outlet 42.

In one embodiment, the connection portion 48 includes a connection post 64 and a cap 66, the connection post 64 defines the connection cavity 52, and the cap 66 connects the connection post 64. When the guide portion 56 and the elastic member 60 are mounted, the top cover 66 is separated from the connection cylinder 64, the top of the connection cylinder 64 is in an open state, the guide portion 56 is separated from the sealing portion 58, the guide portion 56 sleeved with the elastic member 60 is loaded into the connection cavity 52 from the top of the connection cylinder 64, and then the top cover 66 is fixedly mounted on the top of the connection cylinder 64 to seal. The elastic member 60 is located between the collar 62 and the bottom wall of the connection chamber 52, and the guide portion 56 extends from the connection hole 54 to be connected with the sealing portion 58, so that the guide portion 56 and the elastic member 60 are mounted in the connection chamber 52.

In some embodiments, the cover 24 is provided with a receiving slot 68, and the bottom of the cover 24 is provided with an opening of the receiving slot 68, and the liquid cooling plate 26 is connected at the opening of the receiving slot 68 to collectively enclose the receiving chamber 18.

In this way, the weight of the battery pack 100 can be reduced, and the energy density of the battery pack 100 can be improved.

Specifically, in fig. 2, with the opening of the receiving groove 68 facing downward, the liquid cooling plate 26 may be attached to the bottom of the cover 24 and seal the opening of the receiving groove 68 to form the relatively sealed receiving chamber 18. The liquid cooling plate 26 part provided with the first connector 28 and the second connector 30 is not covered by the cover body 24, so that the first connector 28 and the second connector 30 are conveniently connected through pipelines. A sealing ring 70 is arranged at the joint of the cover 24 and the liquid cooling plate 26 to ensure the tightness of the accommodating cavity 18. The cover 24 and the liquid cooling plate 26 may be fixed by welding, bolting, or the like. Preferably, the cover 24 is detachably connected to the liquid cooling plate 26.

The cover 24 and the liquid cooling plate 26 together enclose the accommodating cavity 18, so that the side beams used by the conventional box body can be reduced, the weight of the battery pack 100 can be further reduced, and the energy density of the battery pack 100 can be improved. Preferably, the cover 24 is made of a non-metallic material (e.g., plastic) to further reduce the weight of the battery pack 100.

In fig. 1, the front side of the cover 24 is provided with a high voltage connector 72, the high voltage connector 72 may be connected to an electrode of a battery pack formed by electrically connecting a plurality of battery cells 14, and the battery cells 14 may be supplied with power to the outside through the high voltage connector 72 and charged through the high voltage connector 72. The high voltage connector 72 is secured to the front side of the cover 24 by a mounting plate 74.

An energy storage device of an embodiment of the present utility model includes the battery pack 100 of any of the above embodiments.

In the above energy storage device, the explosion-proof valve 16 is mounted at the mounting hole 20 formed in the liquid cooling plate 26, the liquid cooling plate 26 is connected to the bottom of the cover 24, and when the explosion-proof valve 16 is exploded, the electrolyte accumulated in the liquid cooling plate 26 can be discharged out of the battery pack 100, so that the electrolyte is prevented from being ignited due to accumulation of the electrolyte and short-circuit ignition in the battery pack 100, and the ignition and explosion of the energy storage system are induced.

In particular, the energy storage device may further include a cluster frame on which one or more battery packs 100 may be mounted. The plurality of battery packs 100 may be arranged in an array on a cluster frame. The plurality of battery packs 100 may be electrically connected in series, parallel, or series-parallel.

The energy storage device may include, but is not limited to, an energy storage container, a household energy storage cabinet, and the like.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery pack, comprising:

a cover body;

the liquid cooling plate is connected with the bottom of the cover body and is provided with a mounting hole;

and the explosion-proof valve is arranged in the mounting hole and seals the mounting hole.

2. The battery pack according to claim 1, wherein the battery pack comprises a battery cell, the cover body and the liquid cooling plate enclose a containing cavity, the battery cell is located in the containing cavity, and the bottom surface of the battery cell is connected with the liquid cooling plate.

3. The battery pack of claim 2, wherein the liquid cooling plate is connected to the bottom surface of the battery cell by a heat conductive adhesive.

4. The battery pack according to claim 3, wherein the liquid cooling plate is provided with a receiving groove, and the heat conductive adhesive is received in the receiving groove.

5. The battery pack according to claim 2, wherein the explosion-proof valve includes a body provided with a communication passage including an air inlet communicating with the accommodation chamber and the air outlet, and a valve body sealing the air outlet;

when the valve body is jacked up by the gas from the communication channel, the accommodating cavity is communicated with the outside of the battery pack through the communication channel.

6. The battery pack according to claim 5, wherein the body includes a communication portion and a holding portion, the holding portion is connected to a circumferential side surface of the communication portion, the communication portion is provided with the communication passage, the communication portion is located in the mounting hole, and the holding portion holds against an outer side surface of the liquid cooling plate.

7. The battery pack according to claim 5, wherein a connecting portion is provided in the communication passage, the valve body is movably connected to the connecting portion, the valve body is movable back and forth between a closed position in which the valve body seals the air outlet, and an open position in which the valve body opens the air outlet.

8. The battery pack according to claim 7, wherein a connecting cavity is formed in the connecting portion, a connecting hole is formed in the bottom of the connecting cavity, and the valve body comprises a guide portion, a sealing portion and an elastic member;

the guide part is partially positioned in the connecting cavity and penetrates through the connecting hole, the elastic piece is positioned in the connecting cavity, one end of the elastic piece is connected with the guide part, and the other end of the elastic piece is connected with the inner wall of the connecting cavity;

the sealing part is connected with one end of the guiding part, which is positioned outside the connecting part, and seals the air outlet.

9. The battery pack according to claim 2, wherein the cover body is provided with a receiving groove, an opening of the receiving groove is provided at a bottom of the cover body, and the liquid cooling plate is connected at the opening of the receiving groove to jointly enclose the receiving chamber.

10. An energy storage device comprising the battery pack of any one of claims 1-9.