CN220492056U - battery pack - Google Patents

Abstract

The utility model discloses a battery pack, comprising: the liquid cooling plate is provided with a plurality of cooling cavities and at least one accommodating cavity, the accommodating cavities are mutually separated, and two cooling cavities are respectively arranged on two sides of one accommodating cavity; the cooling cavity is used for accommodating cooling medium, the liquid cooling plate is further provided with a first opening communicated with the accommodating cavity, the cooling cavity is used for accommodating cooling medium, and the liquid cooling plate is further provided with a first opening communicated with the accommodating cavity; the battery cell has an explosion-proof valve, and the explosion-proof valve sets up with first opening is relative, and the explosion-proof valve is configured as: when the pressure in the single battery reaches a set value, the explosion-proof valve is opened, and substances sprayed from the interior of the single battery through the explosion-proof valve enter the accommodating cavity from the first opening; the cooling medium is capable of cooling the substance in the receiving chamber. The battery pack disclosed by the utility model not only can effectively cool down substances sprayed out of the explosion-proof valve by the single battery, but also can prevent thermal runaway from spreading, and has higher adaptability.

Description

battery pack

Technical field

The utility model relates to the field of battery technology, and in particular to a battery pack.

Background technique

In related technologies, in order to avoid safety accidents due to thermal runaway of the battery, an explosion-proof valve is installed on the battery. When the battery undergoes thermal runaway, the explosion-proof valve will emit a large amount of gas and high-temperature particles. Among them, the temperature of the gas and high-temperature particles ejected by the explosion-proof valve is relatively high, which will increase the temperature of the battery pack. Moreover, a large amount of gas and high-temperature particles can easily cause thermal runaway spread inside the battery pack, leading to phase damage in the battery pack. Neighboring batteries burned out together.

Existing battery packs connect explosion-proof valves to the liquid cooling plate, and then allow objects ejected from the battery to enter the liquid cooling plate, thereby protecting adjacent batteries. However, in order to implement this method, the battery needs to be designed to special specifications, which will lead to poor adaptability of the battery pack.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present utility model proposes a battery pack that can not only effectively cool down the material ejected from the explosion-proof valve of the single battery, but also prevent the spread of thermal runaway, and also has high adaptability.

The battery pack according to the first embodiment of the present invention includes:

The liquid cooling plate has a plurality of cooling cavities and at least one accommodation cavity. The accommodation cavity and the cooling cavity are separated from each other along the width direction of the liquid cooling plate, and two accommodation chambers are respectively provided on both sides of the accommodation cavity. The cooling cavity is used to accommodate a cooling medium, and the liquid cooling plate is further provided with a first opening communicating with the accommodation cavity;

Single battery, the single battery has an explosion-proof valve, the explosion-proof valve is arranged opposite to the first opening, the explosion-proof valve is configured to: when the pressure inside the single battery reaches a set value, the explosion-proof valve The explosion-proof valve is opened, and the material ejected from the inside of the single cell through the explosion-proof valve enters the accommodation cavity from the first opening; the cooling medium can carry out treatment on the substance in the accommodation cavity. cool down.

The battery pack according to the embodiment of the present invention has at least the following beneficial effects: the liquid cooling plate has a plurality of cooling cavities and at least one accommodation cavity, and the cooling cavity is used to accommodate the cooling medium to dissipate heat for the single battery; when the single battery is due to When the temperature is too high and thermal runaway occurs, the pressure inside the single cell reaches the set value of the explosion-proof valve, and the explosion-proof valve opens to allow the ejected material in the single cell to enter the accommodation cavity from the first opening. In this way, substances due to thermal runaway of the single cell, such as gas and electrolyte, will enter the containing cavity. In the prior art, when a single cell is thermally out of control, the explosion-proof valve is opened, causing gas and electrolyte to spread around adjacent single cells, thus affecting the performance of adjacent single cells and even causing danger. When the single cell of this application is thermally out of control, the explosion-proof valve opens, and the material in the single cell can enter the containing cavity. The cooling medium in the cooling cavity can also cool down the gas and liquid in the containing cavity, and because the single cell The material ejected from the single cell enters the containing cavity, so it will not affect and spread to adjacent single cells. Specifically, a battery pack with single cells can effectively cool down the material ejected from the explosion-proof valve by the single cells and prevent the spread of thermal runaway. Furthermore, since the accommodating cavity and the cooling cavity are separated from each other along the width direction of the liquid cooling plate, and two cooling cavities are respectively provided on both sides of one accommodating cavity. Therefore, the accommodating cavity may be located at a middle position in the width direction of the liquid cooling plate, or the accommodating cavity may be located at an end position in the width direction of the liquid cooling plate. In this way, the first opening of the accommodation cavity can correspond to multiple types of single cells, so that the battery pack has higher adaptability. Specifically, the battery pack can not only effectively cool down the material ejected from the explosion-proof valve of the single battery, and prevent the spread of thermal runaway, but also has high adaptability.

According to the battery pack according to some embodiments of the present invention, the battery pack further includes a box body, the box body has a storage cavity, and the liquid cooling plate and the single battery are arranged in the storage cavity; The box also has an exhaust channel and an exhaust port that communicate with each other. The liquid cooling plate is also provided with a second opening that communicates with the accommodation cavity. The second opening communicates with the exhaust channel. The exhaust port is located on a side surface of the box facing away from the storage chamber.

According to the battery pack of some embodiments of the present invention, both ends of the liquid cooling plate are respectively connected to the walls of the storage cavity.

According to the battery pack of some embodiments of the present invention, the single battery is connected to the liquid cooling plate, and there are multiple single batteries and the liquid cooling plate, and each liquid cooling plate has A row of single cells is provided on both sides, the liquid cooling plate is provided with a plurality of first openings, and the explosion-proof valve of each single cell is arranged opposite to one of the first openings.

According to the battery pack of some embodiments of the present invention, the liquid cooling plate includes a first partition that divides the accommodation chamber into two mutually independent sub-accommodation chambers, and the first opening It is arranged on the side of the sub-accommodating cavity away from the first partition.

According to the battery pack of some embodiments of the present invention, the battery pack further includes a sealing member, the sealing member has a third opening, and both sides of the sealing member are connected to the single battery and the liquid cooling respectively. The first opening and the explosion-proof valve are arranged opposite to the third opening.

According to the battery pack of some embodiments of the present invention, the liquid cooling plate includes a second partition, the accommodation cavity and the cooling cavity are respectively provided on both sides of the second partition, and the second partition The plate includes a weak area and a surrounding area, the surrounding area is connected to the periphery of the weak area, and the thickness of the weak area is smaller than the thickness of the surrounding area.

According to the battery pack according to some embodiments of the present invention, the battery pack further includes a temperature adjustment plate, the explosion-proof valve is provided at one end of the single battery, and the temperature adjustment plate is connected to the end of the single battery. On the side, the temperature adjustment plate is used to cool or heat the single cell.

A battery pack according to a second embodiment of the present invention includes:

The box includes a plurality of plates, and the plurality of plates jointly define a storage cavity. The interior of the plate has a plurality of cooling chambers and at least one receiving cavity. Along the height direction of the plate, the cooling chamber and the The accommodation chambers are separated from each other, and two cooling chambers are provided on both sides of one accommodation chamber; the cooling chamber is used to store cooling medium, and the plate is also provided with a first opening communicating with the accommodation chamber ;

A single battery is connected to the box. The single battery is arranged in the storage cavity. The single battery has an explosion-proof valve. The explosion-proof valve is arranged opposite to the first opening. The explosion-proof valve It is configured to: when the pressure inside the single cell reaches a set value, the explosion-proof valve opens, and the material ejected from the inside of the single cell through the explosion-proof valve enters the first opening. In the accommodation cavity; the cooling medium can cool the substance in the accommodation cavity.

The battery pack according to the embodiment of the present invention has at least the following beneficial effects: multiple plates jointly form a storage cavity in which single batteries can be placed; in addition, the plates have multiple cooling cavities and at least one accommodation cavity, and the cooling cavity is used for storage and cooling. medium, thereby dissipating heat to the single battery; when the single battery undergoes thermal runaway due to excessive temperature, the pressure inside the single battery reaches the set value of the explosion-proof valve, the explosion-proof valve opens, and the pressure from the single battery passes through the explosion-proof valve. The material ejected from the inside enters the containing cavity from the first opening, and the cooling medium can act on the material in the containing cavity. In this way, substances due to thermal runaway of the single cell, such as gas and electrolyte, will enter the containing cavity. In the prior art, when a single cell is thermally out of control, the explosion-proof valve is opened, causing gas and electrolyte to spread around adjacent single cells, thus affecting the performance of adjacent single cells and even causing danger. When the single cell of this application is thermally out of control, the explosion-proof valve is opened, and the material in the single cell can enter the containing cavity. The cooling medium in the cooling cavity can also cool the containing cavity, and because the material in the single cell can into the containing cavity, so it will not affect and spread to adjacent single cells. Specifically, a battery pack with single cells can effectively cool down the material ejected from the explosion-proof valve by the single cells and prevent the spread of thermal runaway. Furthermore, since the accommodating cavity and the cooling cavity are separated from each other along the height direction of the plate, and two cooling cavities are respectively provided on both sides of one accommodating cavity. Therefore, the accommodating cavity may be located at a middle position in the height direction of the board, or the accommodating cavity may be located at an end position in the height direction of the board. In this way, the first opening of the accommodation cavity can correspond to multiple types of single cells, so that the battery pack has higher adaptability. Specifically, the battery pack can not only effectively cool down the material ejected from the explosion-proof valve of the single battery, and prevent the spread of thermal runaway, but also has high adaptability.

According to the battery pack of some embodiments of the present invention, the plate is further provided with an exhaust port connected to the accommodation chamber, and the exhaust port is located on a side surface of the box facing away from the storage chamber.

Additional aspects and advantages of the invention 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 invention.

Description of the drawings

The utility model will be further described below in conjunction with the accompanying drawings and examples, wherein:

Figure 1 is a schematic diagram of a battery pack according to some embodiments of the present invention;

Figure 2 is an exploded schematic diagram of a battery pack according to some embodiments of the present invention;

Figure 3 is a partial schematic diagram of a battery pack according to some embodiments of the present invention;

Figure 4 is an enlarged schematic diagram of position A in Figure 3;

Figure 5 is a schematic diagram of the liquid cooling plate in the battery pack according to the first embodiment of the present invention;

Figure 6 is a schematic diagram of the liquid cooling plate in the battery pack according to the second embodiment of the present invention;

Figure 7 is a schematic plan view of the second partition of the liquid cooling plate in the battery pack according to the first embodiment of the present invention;

Figure 8 is a schematic diagram of a single battery in the battery pack according to the first embodiment of the present invention;

Figure 9 is a schematic diagram of a single battery in the battery pack according to the second embodiment of the present invention;

Figure 10 is a schematic diagram of a seal in a battery pack according to some embodiments of the present invention.

Reference signs:

Battery pack 10, box 100, storage cavity 110, exhaust channel 120, main body 130, cross beam 140, liquid cooling plate 200, cooling cavity 210, accommodation cavity 220, opening group 230, first opening 240, second opening 250, The first partition 260 , the second partition 270 , the weak area 280 , the surrounding area 290 , the single cell 300 , the explosion-proof valve 310 , the seal 400 , the third opening 410 , and the exhaust valve 500 .

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and cannot be understood as limitations of the present invention.

In the description of the present invention, it should be understood that the orientation descriptions involved, such as the orientation or positional relationships indicated by up, down, front, back, left, right, etc. are based on the orientation or positional relationships shown in the drawings, and only It is intended to facilitate the description of the present invention and simplify the description, but does 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 therefore cannot be understood as a limitation of the present invention.

In the description of the present invention, several means one or more, plural means two or more, greater than, less than, over, etc. are understood as excluding the original number, and above, below, within, etc. are understood as including the original number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features. relation.

In the description of the present utility model, unless otherwise explicitly limited, words such as setting, installation, and connection should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution. .

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

Referring to FIG. 1 , in some embodiments, the battery pack 10 includes: a liquid cooling plate 200 and a single battery 300 . The liquid cooling plate 200 has a plurality of cooling cavities 210 and at least one receiving cavity 220. The receiving cavities 220 and the cooling cavities 210 are separated from each other along the width direction of the liquid cooling plate 200, and two cooling chambers are respectively provided on both sides of the receiving cavity 220. Cavity 210. The liquid cooling plate 200 is also provided with a first opening 240 that communicates with the accommodating cavity 220. The cooling cavity 210 is used to accommodate a cooling medium, and the cooling medium can cool the material in the accommodating cavity 220. When the liquid cooling plate 200 is in contact with the single battery 300, the cooling medium can dissipate heat to the single battery 300 to prevent the temperature of the single battery 300 from being too high. In addition, the single battery 300 is connected to the liquid cooling plate 200, and the cooling cavity 210 can also cool down the accommodation cavity 220.

Referring to Figure 8, the single battery 300 has an explosion-proof valve 310. When the internal pressure of the battery is too high, the explosion-proof valve 310 automatically opens the valve and directly discharges the internal high-pressure gas, thereby achieving the purpose of explosion prevention. Among them, the structure of the explosion-proof valve 310 belongs to the existing technology and will not be introduced in detail here. The explosion-proof valve 310 is arranged opposite to the first opening 240. The specific way in which the explosion-proof valve 310 is arranged opposite to the first opening 240 is that the opening of the explosion-proof valve 310 and the first opening 240 are arranged oppositely. The first openings 240 are arranged oppositely, so that when the material in the single cell 300 is ejected from the opening of the explosion-proof valve 310, the material in the single cell 300 can enter the accommodation chamber 220 through the first opening 240.

The explosion-proof valve 310 is configured such that when the pressure inside the single cell 300 reaches a set value, the explosion-proof valve 310 opens, and the material ejected from the inside of the single cell 300 through the explosion-proof valve 310 enters the accommodation cavity 220 from the first opening 240 . Specifically, please refer to FIG. 4 . The arrows in FIG. 4 illustrate the flow path of the material in the single battery 300 when the single battery 300 is thermally runaway. The liquid cooling plate 200 has a cooling cavity 210 and a receiving cavity 220 that are separated from each other. The cooling cavity 210 is used to store a cooling medium to dissipate heat for the single battery 300; when the single battery 300 undergoes thermal runaway due to excessive temperature, the single battery 300 will lose heat. When the pressure inside the cell 300 reaches the set value of the explosion-proof valve 310, the explosion-proof valve 310 opens, and the material ejected from the interior of the cell 300 through the explosion-proof valve 310 enters the accommodation cavity 220 from the first opening 240. In this way, substances due to thermal runaway of the single cell 300, such as gas and electrolyte, may enter the accommodation cavity 220. In the prior art, when the single cell 300 is thermally out of control, the explosion-proof valve 310 is opened, causing gas and electrolyte to spread around the adjacent single cells 300, thereby affecting the performance of the adjacent single cells 300, and even causing danger. . When the single cell 300 of the present application is thermally out of control, the explosion-proof valve 310 is opened, and the material in the single cell 300 can enter the accommodation cavity 220. The cooling medium in the cooling cavity 210 can also cool down the accommodation cavity 220, and due to The material in the single cell 300 enters the containing cavity 220 and therefore does not affect or spread to adjacent single cells 300 . Specifically, the battery pack 10 with the single cell 300 can effectively cool down the material ejected from the explosion-proof valve by the single cell 300 and prevent the spread of thermal runaway. Further, along the width direction of the liquid cooling plate 200, the accommodation cavity 220 and the cooling cavity 210 are separated from each other, and two cooling cavities 210 are respectively provided on both sides of one accommodation cavity 220. Therefore, the accommodation cavity 220 may be located at a middle position in the width direction of the liquid cooling plate 200 , or the accommodation cavity 220 may be located at an end position in the width direction of the liquid cooling plate 200 . In this way, the first opening 240 of the accommodation cavity 220 can correspond to multiple types of single cells 300 , so that the battery pack 10 has higher adaptability. Specifically, the battery pack 10 can not only effectively cool down the material ejected from the explosion-proof valve 310 of the single cell 300 and prevent the spread of thermal runaway, but also has high adaptability.

Referring to Figures 8 and 9, various types of single cells 300 are introduced below. Among them, the explosion-proof valve 310 is generally provided on the top cover. The explosion-proof valve 310 of a single cell 300 will be located in the middle of the top cover. In this case, an accommodation cavity 220 corresponding to the explosion-proof valve 310 can be provided in the middle of the liquid cooling plate 200 . The explosion-proof valves 310 of another type of single cell 300 will be located at both ends of the top cover. In this case, accommodating cavities 220 corresponding to the explosion-proof valves 310 can be provided at both ends of the liquid cooling plate 200 . Please refer to FIGS. 5 and 6 . The specific manner in which the liquid cooling plate 200 has mutually separated cooling cavities 210 and accommodating cavities 220 is that the liquid cooling plate 200 has two cooling cavities 210 and one accommodating cavity 220 . The two cooling cavities 210 respectively located at the upper and lower ends of a receiving cavity 220. That is, in the vertical direction, the receiving cavity 220 is located in the middle position. The liquid cooling plate 200 may have a cooling cavity 210 and an accommodating cavity 220 that are separated from each other. The liquid cooling plate 200 may have a cooling cavity 210 and an accommodating cavity 220 , and the cooling cavity 210 is located on one side of the accommodating cavity 220 . For example, the receiving cavity 220 is on the left side, and the cooling cavity 210 is on the right side. Alternatively, the receiving cavity 220 is on the right side and the cooling cavity 210 is on the left side. Among them, the changeable positions of the cooling cavity 210 and the accommodation cavity 220 allow the liquid cooling plate 200 to have more adaptability to match the arrangement of the single cells 300 in the storage cavity 110 of the battery pack 10 . Specifically, please refer to Figures 6, 8 and 9. It can be known that the explosion-proof valves 310 of different types of single cells 300 can correspond to the first opening 240 of the accommodation cavity 220 of the liquid cooling plate 200. Therefore, this application The battery pack 10 can be adapted to different types of single cells 300 .

As mentioned above, since the accommodation cavity 220 is provided in the liquid cooling plate 200, it can prevent the single cell 300 from spreading the material in the single cell 300 to the adjacent single cells 300 when the thermal runaway occurs. Among them, when the single cell 300 ejects a large amount of material due to thermal runaway, it can be discharged out of the battery pack 10 , that is, into the external environment of the battery pack 10 , thereby reducing the impact on the battery pack 10 and improving safety performance. Therefore, please refer to FIGS. 3 and 4 . The arrows in FIG. 4 illustrate the flow paths of materials in the single battery 300 when the single battery 300 is thermally runaway. In some embodiments, the battery pack 10 further includes a box 100 having a storage cavity 110 in which the liquid cooling plate 200 and the single battery 300 are disposed. The box 100 also has an exhaust channel 120 and an exhaust port (please refer to Figure 1 for the exhaust channel 120. The dotted line in Figure 1 indicates the exhaust channel 120). The liquid cooling plate 200 is also provided with a second air outlet connected to the accommodation cavity 220. The opening 250 , the second opening 250 and the exhaust channel 120 are connected, and the exhaust port is located on a side surface of the box 100 facing away from the storage chamber 110 . The exhaust passage 120 communicates with the outside through the exhaust port. The following is a detailed description of the flow path of the material in the single battery 300 when the single battery 300 is thermally runaway. First, when the single cell 300 undergoes thermal runaway due to excessive temperature, the pressure inside the single cell 300 will gradually increase, thereby reaching the set value of the explosion-proof valve 310 . At this time, the explosion-proof valve 310 is opened, and the substances in the single cell 300 such as gas and electrolyte will be ejected from the opening of the explosion-proof valve 310 and then enter the accommodation cavity 220 through the first opening 240 . After entering the accommodation cavity 220 , since the accommodation cavity 220 is connected to the second opening 250 , the material in the single cell 300 will pass through the second opening 250 and enter the exhaust channel 120 . Finally, the outside is exhausted through the exhaust channel 120 .

Please refer to Figure 1. In some embodiments, an exhaust valve 500 is provided at the exhaust port of the exhaust channel 120. The exhaust valve 500 can exhaust the gas in the material of the single cell 300 and prevent the electrolyte from being discharged to the outside world. ,polluted environment. Or, when the battery pack 10 is installed on a car, the electrolyte is prevented from harming the car. In addition, the exhaust valve 500 may be replaced by a pressure relief valve. The exhaust valve 500 can completely discharge the gas in the accommodating cavity 220, and the pressure relief valve can remove the gas in the accommodating cavity 220 when the gas pressure exceeds the pressure.

In some embodiments, the single cell 300 also has a pole, wherein the pole can be disposed on one side of the single cell 300, and the explosion-proof valve 310 is disposed on the side of the single cell 300 opposite to the pole. The pole can also be disposed on the same side of the single cell 300 as the explosion-proof valve 310 . This method can make the single battery 300 have higher adaptability.

Further, it can be understood that the greater the strength of the battery pack 10, the less impact the battery pack 10 will receive when it encounters collision, impact, or drop. Therefore, the battery pack 10 can protect the single cells 300 in the battery pack 10 due to its high structural strength, and the battery pack 10 is not easily deformed. Therefore, the structural strength of the battery pack 10 can be improved by arranging the cross beams 140 . Specifically, please refer to Figure 3. In some embodiments, the box 100 includes a main body 130 and a beam 140. The main body 130 has a storage cavity 110, and the beam 140 is connected to the cavity wall of the storage cavity 110. The cross beam 140 is connected to the main body 130, thereby strengthening the structural strength of the main body 130, so that the box 100 of the battery pack 10 has higher strength.

In some embodiments, the main body 130 and the beam 140 are a one-piece structure. Among them, the box 100 is made through an integrated molding process, which is fast in efficiency and high in strength, and can meet the usage requirements of the battery pack 10 .

Please refer to FIG. 3 . In some embodiments, both ends of the liquid cooling plate 200 are respectively connected to the chamber walls of the storage chamber 110 . Specifically, both ends of the liquid cooling plate 200 can be welded to the chamber walls of the storage chamber 110 respectively. The liquid cooling plate 200 can serve as the beam 140 of the box 100 and enhance the structural strength of the box 100 . The liquid cooling plate 200 can also play a role in dissipating heat for the single battery 300 . In this way, compared with the prior art in which the box 100 in the battery pack 10 is provided with a liquid cooling plate 200 , the battery pack 10 in this embodiment can save the space occupied by the liquid cooling plate 200 . In this way, the integration level and space utilization of the battery pack 10 can be improved, more single cells 300 can be placed in the storage cavity 110 , and the energy density of the battery pack 10 can be increased.

The liquid cooling plate 200 mentioned above can be used as the cross beam 140 to improve the structural strength of the box 100 . The following describes the case where the battery pack 10 includes multiple single cells 300 and multiple liquid cooling plates 200 . Please refer to Figures 2 and 5. In some embodiments, the single cell 300 is connected to the liquid cooling plate 200. There are multiple single cells 300 and liquid cooling plates 200, and both sides of each liquid cooling plate 200 are respectively A row of single cells 300 is provided, the liquid cooling plate 200 is provided with a plurality of first openings 240 , and the explosion-proof valve 310 of each single cell 300 is arranged opposite to one first opening 240 . A row of single cells 300 includes a plurality of single cells 300 . The following is an example of a liquid cooling plate 200 with four single cells 300 provided on both sides. That is, a row of single cells 300 includes four single cells 300 . The liquid cooling plate 200 is provided with a plurality of opening groups 230 , and the opening groups 230 include two first openings 240 respectively provided on both sides of the accommodation cavity 220 . Please refer to FIG. 2 , there may be eight single cells 300 , four single cells 300 are located on the left side of the liquid cooling plate 200 , and four single cells 300 are located on the right side of the liquid cooling plate 200 . The liquid cooling plate 200 is provided with four opening groups 230 . (The position of the opening groups 230 can be referred to FIG. 5 ). The two first openings 240 of one opening group 230 are respectively on both sides of the liquid cooling plate 200 . Among them, the four first openings 240 on the left side of the liquid cooling plate 200 correspond to the explosion-proof valves 310 of the four single cells 300 respectively, and the four first openings 240 on the right side of the liquid cooling plate 200 correspond to the explosion-proof valves 310 of the four single cells respectively. The explosion-proof valve 310 of the battery 300 corresponds. In this way, by arranging multiple opening groups 230 on the liquid cooling plate 200, when the explosion-proof valve 310 of a certain single cell 300 among the plurality of single cells 300 is opened, the material in the single cell 300 can enter the accommodation cavity 220 without It will affect the adjacent single cells 300. In addition, one liquid cooling plate 200 can not only dissipate heat to eight single cells 300 at the same time, but also prevent thermal runaway of one single cell 300 from spreading to surrounding single cells 300 through one liquid cooling plate 200 . .

In addition, when there are a row of single cells 300 on both sides of the liquid cooling plate 200, the single cell 300 on the left thermally loses control, and when the material inside is ejected, the material may be sprayed on the single cell on the opposite side. 300 on. That is, the material in the single cell 300 on the left side will be sprayed on the single cell 300 on the right side. Therefore, please refer to FIG. 5 . In some embodiments, the liquid cooling plate 200 includes a first partition 260 . The first partition 260 divides the accommodation cavity 220 into two mutually independent sub-accommodation cavities. The first opening 240 is disposed on The side of the sub-accommodating cavity facing away from the first partition 260 . In this way, when the single cell 300 located on one side of the liquid cooling plate 200 experiences thermal runaway, the contents inside the cell will not be sprayed onto the single cell 300 on the opposite side.

The arrangement of the plurality of single cells 300 in the storage cavity 110 will be described below. Please refer to FIG. 5 . In some embodiments, multiple single cells 300 are arranged in an array along the length direction of the liquid cooling plate 200 , and multiple opening groups 230 are arranged at intervals. In this embodiment, the single battery 300 can be placed in the storage cavity 110 in a horizontal manner.

In some embodiments, along the width direction of the liquid cooling plate 200, multiple single cells 300 are arranged in an array, and multiple opening groups 230 are arranged at intervals. In this embodiment, the single battery 300 can be placed in the storage cavity 110 in a vertical manner.

Further, in order to ensure that when the single cell 300 is thermally runaway, when the material in the single cell 300 enters the first opening 240 from the explosion-proof valve 310, the material in the single cell 300 will not overflow to the outside of the single cell 300. , but enters the accommodation cavity 220. This may be in the form of a seal 400 disposed between the single cell 300 and the liquid cooling plate 200 . Specifically, please refer to Figure 10. In some embodiments, the battery pack 10 further includes a seal 400. The seal 400 has a third opening 410. Both sides of the seal 400 are connected to the single cell 300 and the liquid cooling plate respectively. 200, the first opening 240 and the explosion-proof valve 310 are both arranged opposite to the third opening 410. Wherein, the sealing member 400 may be high temperature resistant rubber. After the seal 400 is provided around the explosion-proof valve 310, it can further ensure that the material in the single cell 300 enters the accommodation cavity 220.

Please refer to FIG. 7 . In some embodiments, the liquid cooling plate 200 includes a second partition 270 . The accommodating cavity 200 and the cooling cavity 210 are respectively disposed on both sides of the second partition 270 . The second partition 270 includes a weak area 280 and a surrounding area 290, the surrounding area 290 is connected to the periphery of the weak area 280, and the thickness of the weak area 280 is smaller than the thickness of the surrounding area 290. A flow channel is provided in the cooling cavity 210. The cooling medium may be water, and the water may flow or stand still in the flow channel. The liquid cooling plate 200 may be made of metal. The liquid cooling plate 200 has a cooling cavity 210 and an accommodating cavity 220. The cooling cavity 210 and the accommodating cavity 220 are separated by a second partition 270. The structure of the second partition 270 can be a mechanical structure with different thicknesses, such as a second The separator 270 includes a weak area 280 and a surrounding area 290. The thickness of the weak area 280 is smaller than the thickness of the surrounding area 290. In this way, under the action of high pressure and high temperature, the weak area 280 is under great pressure. When the weak area 280 cannot withstand the pressure, the material in the single cell 300 will break through the weak area 280 and enter from the accommodation cavity 220 into the cooling chamber 210. When the weak area 280 ruptures, a large amount of fluid inside the cooling cavity 210 will flow out, cooling the emissions from the single cell 300 and greatly improving the cooling effect. In addition, the weak zone 280 may also be formed by a brittle material, which is easily affected by pressure and thus breaks.

Among them, when the single cell 300 does not undergo thermal runaway, when the temperature of the single cell 300 is very high, or when the temperature of the single cell 300 is very low, the temperature of the single cell 300 can be managed through the temperature adjustment board. Specifically, in some embodiments, the battery pack 10 further includes a temperature regulating plate. The explosion-proof valve 310 is disposed at one end of the single cell 300 . For example, the explosion-proof valve 310 is disposed at the top or bottom end of the single cell 300 . The temperature regulating plate is connected to the side of the single cell 300 , for example, the temperature regulating plate is connected to the large surface or the small surface of the single cell 300 . The temperature regulating plate is used to cool or heat the single cell 300 . Specifically, hot water can be provided in the temperature adjustment plate, so that when the temperature of the single battery 300 is low, the temperature adjustment plate can heat the single battery 300 . Cold water can be installed in the temperature adjustment plate, so that when the temperature of the single battery 300 is high, the temperature adjustment plate can dissipate heat to the single battery 300 .

In some embodiments, in order to make the temperature adjustment plate have a better effect in managing the temperature of the single cell 300 , a circulating medium can be used to flow in the flow channel of the temperature adjustment plate. Specifically, the temperature regulating plate is connected to the outside world, so that hot water or cold water can flow in the flow channel in the temperature regulating plate. The flowing hot water can continuously heat the single battery 300, and the flowing cold water can continuously heat the single battery 300. Body battery 300 heat dissipation.

Please refer to FIG. 3 . In some embodiments, the battery pack 10 includes a box 100 and a single battery 300 . The box 100 includes a plurality of plates that together define a storage cavity 110 . For example, among the plurality of plates, four plates surround the side walls forming the storage cavity 110 , and two plates surround the top wall and the bottom wall forming the storage cavity 110 . There are multiple cooling cavities 210 and at least one receiving cavity 220 inside the plate. The cooling cavities 210 and the receiving cavity 220 are separated from each other along the height direction of the plate, and two cooling cavities 210 are respectively provided on both sides of one receiving cavity 220. The cooling cavity 210 is used to store cooling medium, and the plate is also provided with a first opening 240 communicating with the containing cavity 220 . The single battery 300 is connected to the box 100 and is arranged in the storage cavity 110 . The single battery 300 has an explosion-proof valve 310 , and the explosion-proof valve 310 is arranged opposite to the first opening 240 . The explosion-proof valve 310 is configured such that when the pressure inside the single cell 300 reaches a set value, the explosion-proof valve 310 opens, and the material ejected from the inside of the single cell 300 through the explosion-proof valve 310 enters the accommodation cavity 220 from the first opening 240 , the cooling medium can cool the material in the containing cavity 220 . Specifically, multiple plates jointly form a storage cavity 110 in which the single battery 300 can be placed. In addition, the plate has a cooling cavity 210 and a receiving cavity 220 that are separated from each other. The cooling cavity 210 is used to store cooling medium to dissipate heat to the single battery 300 ; When the single cell 300 undergoes thermal runaway due to excessive temperature, the internal pressure of the single cell 300 reaches the set value of the explosion-proof valve 310, the explosion-proof valve 310 opens, and the explosion-proof valve 310 ejects from the inside of the single cell 300. The outgoing material enters the containing chamber 220 from the first opening 240 . In this way, substances due to thermal runaway of the single cell 300, such as gas and electrolyte, may enter the accommodation cavity 220. In the prior art, when the single cell 300 is thermally out of control, the explosion-proof valve 310 is opened, causing gas and electrolyte to spread around the adjacent single cells 300, thereby affecting the performance of the adjacent single cells 300, and even causing danger. . When the single cell 300 of the present application is thermally out of control, the explosion-proof valve 310 is opened, and the material in the single cell 300 can enter the accommodation cavity 220. The cooling medium in the cooling cavity 210 can also cool down the accommodation cavity 220, and due to The material in the single cell 300 enters the containing cavity 220 and therefore does not affect or spread to adjacent single cells 300 . Specifically, the battery pack 10 with the single cell 300 can effectively cool down the material ejected from the explosion-proof valve by the single cell 300 and prevent the spread of thermal runaway. Further, along the height direction of the plate, the accommodating cavity 220 and the cooling cavity 210 are separated from each other, and two cooling cavities 210 are respectively provided on both sides of one accommodating cavity 220. Therefore, the accommodating cavity 220 may be located at a middle position in the height direction of the board, or the accommodating cavity 220 may be located at an end position in the height direction of the board. In this way, the first opening 240 of the accommodation cavity 220 can correspond to multiple types of single cells 300 , so that the battery pack 10 has higher adaptability. Specifically, the battery pack 10 can not only effectively cool down the material ejected from the explosion-proof valve 310 of the single cell 300 and prevent the spread of thermal runaway, but also has high adaptability.

In addition, in the above embodiment, because the cooling cavity 210 is provided in the plate, the box 100 of the battery pack 10 also has the function of cooling the single battery 300 . In this way, the battery pack 10 in this embodiment does not require an additional liquid cooling plate 200 , thereby saving more time to place the single cells 300 and improving the energy density of the battery pack 10 .

In addition, the structure of the liquid cooling plate 200 in FIGS. 5 and 6 can be referred to as the manner in which the interior of the plate has multiple cooling cavities 210 and at least one receiving cavity 220 . In the above embodiment, the plate may serve as the liquid cooling plate 200 .

In some embodiments, the plate is also provided with an exhaust port connected to the accommodation cavity 220 , and the exhaust port is located on a side surface of the box 100 facing away from the storage cavity 110 . The accommodating cavity 200 is connected to the outside through the exhaust port, so that the substances in the single cell 300 can be discharged to the outside. The following is a detailed description of the flow path of the material in the single battery 300 when the single battery 300 is thermally runaway. First, when the single cell 300 undergoes thermal runaway due to excessive temperature, the pressure inside the single cell 300 will gradually increase, thereby reaching the set value of the explosion-proof valve 310 . At this time, the explosion-proof valve 310 is opened, and the substances in the single cell 300 such as gas and electrolyte will be ejected from the opening of the explosion-proof valve 310 and then enter the accommodation cavity 220 through the first opening 240 . After entering the accommodating cavity 220, since the accommodating cavity 220 is connected to the exhaust port, the material in the single cell 300 will pass through the exhaust port and be discharged to the outside.

The embodiments of the present utility model are described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, other modifications may be made without departing from the purpose of the present utility model. Make various changes. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims (10)

1. Battery pack, characterized by including: The liquid cooling plate has a plurality of cooling cavities and at least one accommodation cavity. The accommodation cavity and the cooling cavity are separated from each other along the width direction of the liquid cooling plate, and two accommodation chambers are respectively provided on both sides of the accommodation cavity. the cooling cavity; the cooling cavity is used to accommodate a cooling medium, and the liquid cooling plate is further provided with a first opening communicating with the accommodation cavity; Single battery, the single battery has an explosion-proof valve, the explosion-proof valve is arranged opposite to the first opening, the explosion-proof valve is configured to: when the pressure inside the single battery reaches a set value, the explosion-proof valve The explosion-proof valve is opened, and the material ejected from the inside of the single cell through the explosion-proof valve enters the accommodation cavity from the first opening; the cooling medium can carry out treatment on the substance in the accommodation cavity. cool down. 2. The battery pack according to claim 1, characterized in that, the battery pack further includes a box body, the box body has a storage cavity, and the liquid cooling plate and the single battery are both arranged in the storage cavity. In the cavity; the box also has an exhaust channel and an exhaust port that communicate with each other, and the liquid cooling plate is also provided with a second opening that communicates with the accommodation cavity, and the second opening and the exhaust channel Communicated, the exhaust port is located on a side surface of the box facing away from the storage chamber. 3. The battery pack according to claim 2, wherein two ends of the liquid cooling plate are respectively connected to the walls of the storage chamber. 4. The battery pack according to claim 1, wherein the single cell is connected to the liquid cooling plate, and there are multiple single cells and liquid cooling plates, each of which is A row of single cells is provided on both sides of the liquid cooling plate. The liquid cooling plate is provided with a plurality of first openings. The explosion-proof valve of each single cell has one first opening. Relative settings. 5. The battery pack according to claim 4, wherein the liquid cooling plate includes a first partition, and the first partition divides the accommodation chamber into two mutually independent sub-accommodation chambers, so The first opening is provided on a side of the sub-containing cavity away from the first partition. 6. The battery pack according to claim 1, wherein the battery pack further comprises a sealing member, the sealing member has a third opening, and both sides of the sealing member are respectively connected to the single cell and the The liquid cooling plate, the first opening and the explosion-proof valve are all arranged opposite to the third opening. 7. The battery pack according to claim 1, wherein the liquid cooling plate includes a second partition, and the accommodation cavity and the cooling cavity are respectively provided on both sides of the second partition, so The second separator includes a weak area and a surrounding area, the surrounding area is connected to the periphery of the weak area, and the thickness of the weak area is smaller than the thickness of the surrounding area. 8. The battery pack according to claim 1, wherein the battery pack further includes a temperature adjustment plate, the explosion-proof valve is provided at one end of the single battery, and the temperature adjustment plate is connected to the On the side of the single cell, the temperature adjustment plate is used to cool or heat the single cell. 9. Battery pack, characterized by including: The box includes a plurality of plates, and the plurality of plates jointly define a storage cavity. The interior of the plate has a plurality of cooling chambers and at least one receiving cavity. Along the height direction of the plate, the cooling chamber and the The accommodation chambers are separated from each other, and two cooling chambers are provided on both sides of one accommodation chamber; the cooling chamber is used to store cooling medium, and the plate is also provided with a first opening communicating with the accommodation chamber ; A single battery is connected to the box. The single battery is arranged in the storage cavity. The single battery has an explosion-proof valve. The explosion-proof valve is arranged opposite to the first opening. The explosion-proof valve It is configured to: when the pressure inside the single cell reaches a set value, the explosion-proof valve opens, and the material ejected from the inside of the single cell through the explosion-proof valve enters the first opening. In the accommodation cavity; the cooling medium can cool the substance in the accommodation cavity. 10. The battery pack according to claim 9, wherein the plate is further provided with an exhaust port connected to the accommodation chamber, and the exhaust port is located on the side of the box facing away from the storage chamber. one side surface.