Battery pack and gas-liquid treatment system

Abstract

The battery pack comprises a box body, an upper cover, a discharge pipe and a battery cell, the discharge pipe is connected to the upper cover, a pipeline in the discharge pipe is communicated with a containing cavity, the upper cover covers an opening of the box body, and one side, facing the box body, of the upper cover is provided with an inclined surface for guiding gas to the discharge pipe. The inclined surface is arranged on one side, facing the box body, of the upper cover, so that when gas in the accommodating cavity rises to the upper cover, the gas continues to flow along with the guidance of the inclined surface until the gas is discharged out of the battery pack from the discharge pipe. The battery pack is provided with the structure capable of guiding the gas in the battery pack to be exhausted from the exhaust pipe, so that the problem that cooling of a cooling medium is affected due to the fact that the gas is gathered at a certain part in the battery pack is solved, the arrangement of an anti-explosion valve can be omitted, and the situation that the cooling medium is sprayed out from a notch of the anti-explosion valve to pollute the battery pack and the environment is avoided. The utility model further provides a gas-liquid treatment system which comprises the battery pack and has the beneficial effects.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and more specifically, to a battery pack and a gas-liquid treatment system. Background Art

[0002] In the related art, an explosion-proof valve is installed on the box body of the battery pack to prevent explosion. When the internal pressure of the battery pack changes, the explosion-proof valve opens to communicate the inside of the pack with the outside for pressure relief. However, in an immersion-type battery pack, there are battery cells and a cooling medium inside, and the cooling medium fills the inside of the battery pack. When a thermal runaway occurs in the battery cells, a large amount of gas is generated, increasing the pressure inside the battery pack. When the explosion-proof valve opens for pressure relief, the cooling medium will spray out from the gap of the explosion-proof valve, polluting the battery pack and the environment. In addition, when the cooling medium fills the inside of the battery pack, the gas in the battery pack is likely to accumulate in a certain part of the battery pack. The accumulation of gas in a certain part of the pack will affect the cooling effect of the cooling medium in that part, and even affect the composition of the cooling medium. Summary of the Utility Model

[0003] An object of an embodiment of this application is to provide a battery pack. A structure capable of guiding the gas inside the battery pack to be discharged through an exhaust pipe is provided on the upper cover of the battery pack, thereby improving the problem that the cooling of the cooling medium is affected due to the concentrated accumulation of gas in a certain part of the battery pack, and the setting of the explosion-proof valve can also be eliminated, thereby avoiding the cooling medium from spraying out from the gap of the explosion-proof valve and polluting the battery pack and the environment.

[0004] In a first aspect, an embodiment of this application provides a battery pack, including:

[0005] A box body having an accommodation cavity therein. An opening communicating with the accommodation cavity is provided on one side of the box body, and a cooling medium is filled in the accommodation cavity;

[0006] An upper cover covering the opening of the box body;

[0007] An exhaust pipe for discharging the gas in the accommodation cavity. One end of the exhaust pipe is connected to the upper cover, and the pipeline inside the exhaust pipe communicates with the accommodation cavity; and

[0008] Battery cells installed in the accommodation cavity, and at least part of the battery cells are immersed in the cooling medium;

[0009] Wherein, a slope away from the opening is provided on the side of the upper cover facing the opening for guiding the gas to the exhaust pipe.

[0010] In an embodiment, the upper cover includes a plurality of cover plates, and the plurality of cover plates are sequentially connected and surrounded by an intersection point. The slope includes at least one surface of the cover plate facing the opening, and the exhaust pipe is connected to the cover plate.

[0011] In one embodiment, multiple said cover plates are rotationally symmetric about an axis passing through the intersection point, and each said cover plate is inclined downward from the intersection point to form the inclined surface, and the discharge pipe is connected to the intersection point.

[0012] In one embodiment, the cover plate extends and is connected to the side wall of the box body.

[0013] In one embodiment, the included angle between the cover plate and the side wall is 92° to 102°.

[0014] In one embodiment, the included angle between the cover plate and the side wall is 92°.

[0015] In a second aspect, an embodiment of the present application further provides a gas-liquid treatment system, including the above battery pack, and further including a processor, and the other end of the discharge pipe is connected to the processor.

[0016] In one embodiment, the gas-liquid treatment system further includes an explosion component, and the explosion component is arranged in the discharge pipe;

[0017] A control component is arranged in the processor, the control component is electrically connected to the explosion component, and the control component controls the explosion of the explosion component so as to disconnect the discharge pipe.

[0018] In one embodiment, a liquid storage tank is arranged in the processor, the cooling medium is stored in the liquid storage tank, and the liquid storage tank is used to provide the cooling medium to the battery pack;

[0019] The battery pack further includes an input pipe, the input pipe is connected between the box body and the liquid storage tank, the pipeline in the input pipe is communicated with the accommodation cavity, and the input pipe is used to input the cooling medium;

[0020] The liquid storage tank is connected to the other end of the discharge pipe, and the discharge pipe is further used to discharge the cooling medium.

[0021] In one embodiment, a liquid storage cavity and a buffer cavity that are communicated are arranged in the liquid storage tank, the buffer cavity is located on a side of the liquid storage cavity away from the bottom of the box, the cooling medium is located in the liquid storage cavity, and the buffer cavity is communicated with the outside.

[0022] The beneficial effects of the battery pack provided by the embodiments of the present application are as follows: Compared with the related art, the battery pack of the present application includes a box body, an upper cover, a discharge pipe, and battery cells. The discharge pipe is connected to the upper cover, and the pipeline inside the discharge pipe is communicated with the accommodation cavity. The upper cover covers the opening of the box body, and a slope for guiding gas to the discharge pipe is provided on the side of the upper cover facing the box body. The present application provides a slope on the side of the upper cover facing the box body, so that when the gas in the accommodation cavity rises to the upper cover, it continues to flow along the guidance of the slope until it is discharged from the discharge pipe of the battery pack. The battery pack of the present application is provided with a structure that can guide the gas in the battery pack to be discharged from the exhaust pipe, thereby improving the problem that the cooling medium is affected by the accumulation of gas in a certain part of the battery pack, and the setting of the explosion-proof valve can also be eliminated, thereby avoiding the cooling medium from spraying out from the gap of the explosion-proof valve and polluting the battery pack and the environment. The embodiments of the present application also provide a gas-liquid treatment system, including the above battery pack, and having the above beneficial effects. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of the battery pack provided by the embodiments of the present application;

[0025] Figure 2 Structural schematic diagram of the gas-liquid treatment system provided by the embodiments of the present application;

[0026] Figure 3 Structural schematic diagram of the processor in the gas-liquid treatment system provided by the embodiments of the present application;

[0027] Figure 4 A structural schematic diagram of the explosion component, control component, and battery pack in the gas-liquid treatment system provided by the embodiments of the present application;

[0028] Figure 5 Another structural schematic diagram of the explosion component, control component, and battery pack in the gas-liquid treatment system provided by the embodiments of the present application.

[0029] Among them, the reference numerals in the drawings are as follows:

[0030] Gas-liquid treatment system 100; Battery pack 110; Processor 120; Explosion component 130;

[0031] Box body 111; Upper cover 112; Battery cell 113; Discharge pipe 114; Input pipe 115;

[0032] Liquid storage tank 121; control component 122; cooling component 123; heat exchange component 124;

[0033] Resistance wire 131; explosive 132;

[0034] Bottom plate 1111; side wall 1112; cover plate 1121;

[0035] Accommodation cavity U1; liquid storage cavity U2; buffer cavity U3; cooling medium C; inclined plane T; intersection point P; intersection point axis L. Detailed implementation manners

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 to the present application.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0040] Please refer to together Figure 1 and Figure 2 , and a gas-liquid treatment system 100 provided by an embodiment of the present application will be described now.

[0041] The gas-liquid treatment system 100 of the present application includes a battery pack 110 and a processor 120. Among them, the battery pack 110 includes a box body 111, an upper cover 112, battery cells 113, a discharge pipe 114 and an input pipe 115, as Figure 1As shown in the figure. Inside the box body 111, there is a receiving cavity U1. An opening communicating with the receiving cavity U1 is provided on one side of the box body 111. The receiving cavity U1 is filled with a cooling medium C for cooling the battery cell 113. The upper cover 112 is covered on the opening of the box body 111. The discharge pipe 114 is used to discharge the gas in the receiving cavity U1. One end of the discharge pipe 114 is connected to the upper cover 112, and the pipeline inside the discharge pipe 114 communicates with the receiving cavity U1, and the battery cell 113 is installed in the receiving cavity U1. At least a part of the battery cell 113 is immersed in the cooling medium C. It should be noted that there are multiple battery cells 113, and the multiple battery cells 113 are arranged to form a battery cell group and are installed in the receiving cavity U1.

[0042] Among them, on the side of the upper cover 112 facing the opening of the box body 111, there is an inclined surface T away from the opening, and the inclined surface T is used to guide the gas to the discharge pipe 114.

[0043] The battery pack 110 of the present application is provided with an inclined surface T structure that can guide the gas in the receiving cavity U1 of the battery pack 110 to be discharged from the exhaust pipe 114. The gas in the receiving cavity U1 rises to the inclined surface T of the upper cover 112 and continues to flow along the guidance of the inclined surface T until it is discharged from the discharge pipe 114 out of the battery pack 110. The inclined surface T structure of the upper cover 112 of the battery pack 110 can guide the gas in the receiving cavity U1 to be discharged from the exhaust pipe 114, thereby improving the problem that the cooling of the cooling medium C is affected by the accumulation of gas in a certain part of the battery pack 110, and can also eliminate the setting of the explosion-proof valve, thereby avoiding the cooling medium C from spraying out of the gap of the explosion-proof valve and polluting the battery pack 110 and the environment.

[0044] Specifically, as Figure 1 and Figure 2 shown, the upper cover 112 includes a plurality of cover plates 1121. The plurality of cover plates 1121 are sequentially connected and surrounded with a intersection point P, and at least one cover plate 1121 has an inclined surface T on the side facing the opening. The discharge pipe 114 is connected inside any one of the cover plates 1121, or is connected to the intersection point P of the plurality of cover plates 1121.

[0045] Furthermore, the plurality of cover plates 1121 are sequentially connected and rotationally symmetric along the axis L passing through the intersection point P. Each cover plate is inclined downward from the intersection point P to form an inclined surface T. That is, each cover plate 1121 has an inclined surface T on the side facing the opening of the box body 111. It can be understood that the plurality of cover plates 1121 have inclined surfaces T on the side facing the box body 111, and the inclined surface T is rotationally symmetric with the cover plate 1121, so as to evenly guide the gas in the receiving cavity U1 to be discharged.

[0046] Optionally, the discharge pipe 114 is connected to the intersection point P. It can be understood that each cover plate is inclined downward from the intersection point P to form an inclined surface T, such that the intersection point P of the upper cover 112 is located at the topmost position. Since the gas escapes upward, the exhaust pipe 114 is connected to the intersection point P of the upper cover 112, and the gas gathers at the intersection point P along the surrounding inclined surfaces T of the upper cover 112 and is smoothly discharged from the discharge pipe 114 out of the battery pack 110, avoiding the situation where the gas accumulates at the top of the upper cover 112 and cannot be discharged.

[0047] The box body 111 includes a bottom plate 1111 and side walls 1112 surrounding the bottom plate 1111. Specifically, the box body 111 has four side walls 1112, and the four side walls 1112 are connected end to end and surround the bottom plate 1111. The upper cover 112 includes four cover plates 1121 extending in different directions. Each cover plate 1121 extends and is connected to one side wall 1112 of the box body 111. That is, one cover plate 1121 is correspondingly connected to one side wall 1112. It can be understood that the inclined surface T extends along with the extension of the cover plate 1121, and the gas in the accommodation cavity U1 rises to the connection between the cover plate 1121 and the side wall 1112 and is then guided by the inclined surface T to be discharged, reducing the probability of gas accumulation at the connection of the side walls 1112.

[0048] Optionally, the box body 111 has three side walls 1112, and correspondingly, the upper cover 112 includes three cover plates 1121. Or, the box body 111 has five side walls 1112, and correspondingly, the upper cover 112 includes five cover plates 1121. As long as the cover plate 1121 and the side wall 1112 form an inclined surface T, the present application does not limit this.

[0049] Optionally, in some other embodiments, one cover plate 1121 includes a first sub-plate and a second sub-plate. A plurality of first sub-plates are rotationally symmetric about the center of the upper cover 112. A plurality of second sub-plates are rotationally symmetric about the center of the upper cover 112. The second sub-plate is connected to the side of the first sub-plate away from the center, and the second sub-plate is connected to the side wall 1112. The discharge pipe 114 is connected to the center of the upper cover 112. The first sub-plate and the second sub-plate respectively form an upward inclined surface T with respect to the side wall 1112. It can be understood that the gas in the battery pack 110 escapes upward, continues to flow along the second sub-plate, and then flows along the first sub-plate and enters the discharge pipe 114.

[0050] Further, the included angle α between the cover plate 1121 and the corresponding side wall 1112 is 92° to 102°, such as 92°, 92.5°, 93°, 93.5°, 94°, 94.5°, 95°, 95.5°, 96°, 96.5°, 97°, 97.5°, 98°, 98.5°, 99°, 99.5°, 100°, 100.5°, 101°, 101.5° or 102°, etc. It can be understood that if the included angle α between the cover plate 1121 and the corresponding side wall 1112 connected to it is too large, the space formed by the upper cover 112 enclosing is relatively large, so that the volume of the battery pack 110 is relatively large and the occupied space is relatively large. Setting the included angle α between the cover plate 1121 and the corresponding side wall 1112 connected to it to 92° to 102° can reduce the space occupied by the battery pack 110.

[0051] In this embodiment, the included angle α between the cover plate 1121 and the side wall 1112 is 92°. Setting the included angle α between the cover plate 1121 and the side wall 1112 to 92° can, on the one hand, ensure that the gas in the battery pack 110 gathers in the space formed by the upper cover 112 and then is discharged from the discharge pipe 114; on the other hand, since the included angle α between the cover plate 1121 and the side wall 1112 is greater than 90°, the enhancement effect on the energy density of the battery pack 110 is relatively small. On the premise that the upper cover 112 and the side wall 1112 form an inclined plane T, setting the included angle α between the cover plate 1121 and the side wall 1112 to 92° has a relatively small processing difficulty, is beneficial to cost saving, and is beneficial to saving the space of the battery pack 110.

[0052] As Figure 2 shown, one end of the discharge pipe 114 is communicated with the center of the upper cover 112, and the other end is connected to the processor 120. In this embodiment, the processor 120 is a cooler. The pipeline in the discharge pipe 114 is communicated with the accommodation cavity U1. The discharge pipe 114 is used to discharge the gas and the reflux cooling medium C in the accommodation cavity U1. The input pipe 115 is connected between the box body 111 and the processor 120. The pipeline in the input pipe 115 is communicated with the accommodation cavity U1. The input pipe 115 is used to input the cooling medium C into the box body 111.

[0053] It can be understood that connecting the input pipe 115 to the box body 111 facilitates the cooling medium C to enter the box body 111 and squeeze the gas in the battery pack 110 to the upper cover 112. Further, connecting the input pipe 115 to the bottom of the box body 111 away from the upper cover 112 facilitates the cooling medium C to flow into the bottom of the box body 111 and squeeze the gas in the battery pack 110 upward from the bottom of the box body 111.

[0054] In this embodiment, the cooling medium C includes at least one of insulating liquids such as synthetic oil, silicone oil, or fluorinated liquid. The gas in the battery pack 110 includes air. Since the cooling medium C is a liquid and the density of air is much smaller than that of the cooling medium C, after the cooling medium C is poured into the accommodation chamber U1 from the input pipe 115, the gas is squeezed upward, and then the gas gathers in the space surrounded by the upper cover 112 along the inclined surface T of the upper cover 112 and is discharged from the discharge pipe 114.

[0055] In this embodiment, the cooling medium C is an insulating liquid, so that when the cooling medium C enters the accommodation chamber U1 to cool the battery cells 113, it remains insulated, avoiding the situation of short - circuit failure of the battery cells 113.

[0056] During the operation of the battery pack 110, if thermal runaway occurs, the battery cells 113 will release gases such as hydrogen, carbon monoxide, and carbon dioxide into the battery pack 110. The density of the gas mixture in the battery pack 110 is less than 2 kg / m 3 , and the density of the cooling medium C is much greater than 2 kg / m 3 , so that during thermal runaway, the gas generated by the battery cells 113 quickly rises to the cover plate 1121, separates from the cooling medium C, and then enters the exhaust pipe along the inclined surface T of the upper cover 112 to complete pressure relief.

[0057] Optionally, the density of the cooling medium C is 1.96×10 3 ~2.5×10 3 kg / m 3 . Optionally, the cooling medium C is silicone oil, and the density of silicone oil is 0.69×10 3 ~1.06×10 3 kg / m 3 . Or, the cooling medium C is a fluorinated liquid, and the density of the fluorinated liquid is 1×10 3 ~2.5×10 3 kg / m 3 etc. As long as the density of the cooling medium C is greater than the density of the gas in the battery pack 110.

[0058] It should be noted that the density in this application refers to the density of gas or liquid under standard conditions. The standard conditions in this application refer to the state where the temperature is 0°C and the pressure is 101.325 kPa.

[0059] Optionally, the battery pack 110 further includes pole piece fragments. The pole piece fragments are located in the accommodation cavity U1 and immersed in the cooling medium C. It can be understood that the pole pieces of the battery cell 113 may generate fragments, and the pole piece fragments are immersed in the cooling medium C. The density of the pole piece fragments is greater than that of the gas inside the pack. By connecting the exhaust pipe to the upper cover 112, the gas inside the battery pack 110 can escape upward from the mixture of the pole piece fragments and the cooling medium C, thereby discharging the battery pack 110. The battery pack 110 of the present application eliminates the setting of the explosion-proof valve, thus avoiding the situation where the mixture of the pole piece fragments and the cooling medium C blocks the explosion-proof valve and cannot relieve pressure.

[0060] Optionally, the battery pack 110 may further include fragments of the outer shell of the battery cell 113, etc.

[0061] Optionally, in some other embodiments, the horizontal distance between the connection point of the input pipe 115 and the box body 111 and the bottom plate 1111 is greater than or equal to 1 centimeter (cm). Optionally, the horizontal distance between the connection point of the input pipe 115 and the box body 111 and the bottom plate 1111 is 1 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, 1.5 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm or 2 cm, etc. When the pole piece fragments and the fragments of the outer shell of the battery cell 113 fall into the cooling medium C, they are easily deposited at the bottom of the box body 111. The horizontal distance between the connection point of the input pipe 115 and the box body 111 and the bottom plate 1111 being greater than 1 cm can prevent the mixture of the pole piece fragments, the fragments of the outer shell of the battery cell 113 and the cooling medium C from blocking the inlet of the input pipe 115.

[0062] Please refer to Figure 3 , a liquid storage tank 121, a cooling component 123, a heat exchange component 124 and a control component 122 are arranged in the processor 120, as Figure 3 shown. Among them, the liquid storage tank 121 is used to supply the cooling medium C to the battery pack 110, receive the refluxed cooling medium C and the discharged gas. The cooling component 123 reduces the temperature of the cooling medium C in the liquid storage tank 121 through the heat exchange component 124. The control component 122 is electrically connected to the cooling component 123 and controls the temperature of the cooling medium C by controlling the temperature of the cooling component 123.

[0063] The liquid storage tank 121 supplies the cooling medium C with a suitable temperature to the battery pack 110. When the cooling medium C is heated and its temperature rises during the operation of the battery cell 113, when the control component 122 monitors that the temperature inside the battery pack 110 is too high, the pressure is too high or even thermal runaway occurs, it controls the cooling medium C to flow back to the liquid storage tank 121. At this time, the control component 122 cools down the cooling medium C by controlling the cooling component 123, and then inputs the cooling medium C into the battery pack 110 to cool down the battery pack 110. The cooling component 123 cools down the cooling medium C through the heat exchange component 124.

[0064] Optionally, the control component 122 can also control the flow rate of the cooling medium C. When the control component 122 monitors that the temperature is too high, the pressure is too high or even thermal runaway occurs in the battery pack 110, it can increase the flow rate of the cooling medium C entering the battery pack 110 to quickly cool down the battery pack 110.

[0065] In this embodiment, the control component 122 monitors the temperature and pressure inside the battery pack 110 through a plurality of sensors arranged inside the battery pack 110. Optionally, the plurality of sensors include a temperature sensor and a pressure sensor.

[0066] As Figure 3 shown, a communicating liquid storage cavity U2 and a buffer cavity U3 are provided in the liquid storage tank 121. The buffer cavity U3 is located on the side of the liquid storage cavity U2 away from the bottom of the tank to facilitate the separation of the gas entering the liquid storage cavity U2 from the cooling medium C, so that the cooling medium C remains in the liquid storage cavity U2 and the gas enters the buffer cavity U3. The buffer cavity U3 is communicated with the outside, so that the gas can be discharged to the outside.

[0067] Please refer to Figure 4 and Figure 5 . In this embodiment, the gas-liquid treatment system 100 further includes an explosion component 130. A control component 122 is arranged inside the processor 120. The control component 122 is electrically connected to the explosion component 130 to control the explosion of the explosion component 130, thereby disconnecting the discharge pipe 114.

[0068] Optionally, the explosion component 130 can be arranged at any position inside the discharge pipe 114 as long as it is isolated from the cooling medium inside the pipe. In this embodiment, the explosion component 130 is arranged inside the pipe wall of the discharge pipe 114. Specifically, at the connection between the discharge pipe 114 and the upper cover 112, as Figure 4 shown. Or, in some other embodiments, the explosion component 130 is arranged at the connection between the discharge pipe 114 and the processor 120, as Figure 5 shown.

[0069] In this embodiment, the explosion component 130 includes an initiation part and an explosion part. The control component 122 is electrically connected to the initiation part, and the explosion part is in contact with the initiation part. When thermal runaway occurs in the battery pack 110 and the air pressure inside the battery pack 110 increases rapidly and cannot be discharged through the exhaust pipe into the processor 120 in time for pressure relief, the control component 122 ignites the explosion part through the initiation part. As the explosion part explodes, the discharge pipe 114 is blown off, and the gas inside the battery pack 110 can be quickly discharged directly to the outside of the battery pack 110 through the disconnected discharge pipe 114 to complete rapid pressure relief.

[0070] Specifically, the triggering part is the resistance wire 131, and the explosion part is the explosive 132. When the battery pack 110 undergoes thermal runaway and the air pressure inside the battery pack 110 rapidly increases and cannot be vented into the processor 120 through the exhaust pipe in time, the control component 122 causes the resistance wire 131 to heat up, thereby igniting the explosive 132. As the explosive 132 explodes, the discharge pipe 114 is broken.

[0071] The above is the description of the battery pack 110 and the gas-liquid treatment system 100 provided by the embodiments of the present application.

[0072] The battery pack provided by the embodiments of the present application includes a box body, an upper cover, a discharge pipe, and battery cells. The discharge pipe is connected to the upper cover, and the pipe inside the discharge pipe communicates with the accommodation cavity. The upper cover covers the opening of the box body, and a slope for guiding gas to the discharge pipe is provided on the side of the upper cover facing the box body. By providing a slope on the side of the upper cover facing the box body in the present application, when the gas in the accommodation cavity rises to the upper cover, it continues to flow along the guidance of the slope until it is discharged from the battery pack through the discharge pipe. The battery pack of the present application is provided with a structure that can guide the gas in the battery pack to be discharged from the exhaust pipe, thereby improving the problem that the cooling medium is affected by the accumulation of gas in a certain part of the battery pack, and can also eliminate the setting of the explosion-proof valve, thereby avoiding the cooling medium spraying out from the notch of the explosion-proof valve and causing pollution to the battery pack and the environment. The present application also provides a gas-liquid treatment system, including the above-mentioned battery pack, which has the above-mentioned beneficial effects.

[0073] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that: include: A box body having a receiving cavity therein, an opening communicating with the receiving cavity is formed on one side of the box body, and the receiving cavity is filled with a cooling medium; An upper cover, which is arranged at the opening of the box body; an exhaust pipe, used to exhaust the gas in the accommodating chamber, one end of the exhaust pipe is connected to the upper cover, and a pipeline in the exhaust pipe is in communication with the accommodating chamber; and A battery cell is installed in the accommodating cavity, and the battery cell is at least partially immersed in the cooling medium; Wherein, a side of the upper cover facing the opening is provided with an inclined surface away from the opening, which is used to guide the gas to the exhaust pipe.

2. The battery pack according to claim 1, characterized in that: The upper cover includes a plurality of cover plates, which are sequentially connected and surrounded at an intersection, the inclined surface includes at least one side of the cover plate facing the opening, and the discharge pipe is connected to the cover plate.

3. The battery pack according to claim 2, characterized in that: The plurality of cover plates are rotationally symmetrical along an axis passing through the intersection, each of the cover plates is tilted downward from the intersection to form the inclined surface, and the discharge pipe is connected to the intersection.

4. The battery pack according to claim 3, characterized in that: The cover plate extends and is connected to the side wall of the box body.

5. The battery pack according to claim 4, characterized in that: The included angle between the cover plate and the side wall is 92° to 102°.

6. The battery pack according to claim 5, characterized in that: The included angle between the cover plate and the side wall is 92°.

7. A gas-liquid processing system, characterized in that: Comprising the battery pack according to any one of claims 1 to 6, the gas-liquid processing system further comprises a processor, and the other end of the exhaust pipe is connected to the processor.

8. The gas-liquid processing system according to claim 7, characterized in that: The gas-liquid processing system further comprises an explosion assembly, wherein the explosion assembly is arranged in the discharge pipe; A control component is provided in the processing machine, and the control component is electrically connected to the explosion component. The control component controls the explosion of the explosion component to disconnect the discharge pipe.

9. The gas-liquid processing system according to claim 7, characterized in that: A liquid storage tank is provided in the processing machine, the cooling medium is stored in the liquid storage tank, and the liquid storage tank is used to provide the cooling medium to the battery pack; The battery pack further includes an input pipe, the input pipe is connected between the box body and the liquid storage tank, the pipe in the input pipe is communicated with the accommodating cavity, and the input pipe is used to input the cooling medium; The liquid storage tank is connected to the other end of the discharge pipe, and the discharge pipe is also used to discharge the cooling medium.

10. The gas-liquid processing system according to claim 9, characterized in that: The liquid storage box is provided with a connected liquid storage cavity and a buffer cavity, the buffer cavity is located at a side of the liquid storage cavity away from the bottom of the box, the cooling medium is located in the liquid storage cavity, and the buffer cavity is connected to the outside.

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