Box body and battery pack

Abstract

The utility model discloses a box body and a battery pack. The box body comprises a cavity, an exhaust channel and a first cooling flow channel. The chamber is used for containing a battery, the exhaust channel comprises an exhaust inlet and an exhaust outlet, the exhaust inlet is located in the inner wall face of the chamber, and the exhaust outlet is located in the outer surface of the box body. The first cooling flow channel is used for allowing a cooling medium to flow, and at least one part of the first cooling flow channel is adjacent to at least one part of the exhaust channel, so that the cooling medium in the first cooling flow channel cools gas in the exhaust channel. The exhaust channel is used for exhausting gas generated during thermal runaway of the battery contained in the cavity, the first cooling flow channel is arranged, and at least one part of the first cooling flow channel is adjacent to the exhaust channel, so that high-temperature gas can be cooled by a cooling medium in the first cooling flow channel before being exhausted, and the temperature of the exhausted gas is reduced; the safety performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a box and a battery pack. Background Art

[0002] In the related art, battery packs need to take safety measures in case of thermal runaway for safety. In the prior art, exhaust channels are laid in the battery pack to discharge the gas generated when the battery goes into thermal runaway to improve safety. However, the gas generated by the battery during thermal runaway is high in temperature, and direct discharge of high-temperature gas poses a safety hazard. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a box body, which is provided with a cooling flow channel adjacent to the exhaust channel, so that the gas is cooled before being discharged, thereby improving the safety performance of the battery pack.

[0004] The utility model also provides a battery pack having the box body.

[0005] According to the first embodiment of the utility model, the box body includes a chamber, an exhaust channel and a first cooling channel. The chamber is used to accommodate the battery, and the exhaust channel includes an exhaust inlet and an exhaust outlet, the exhaust inlet is located on the inner wall surface of the chamber, and the exhaust outlet is located on the outer surface of the box body. The first cooling channel is used to allow the cooling medium to flow, and at least a portion of the first cooling channel is arranged adjacent to at least a portion of the exhaust channel so that the cooling medium in the first cooling channel cools the gas in the exhaust channel.

[0006] The box body according to the embodiment of the utility model has at least the following beneficial effects: the exhaust channel is used to exhaust the gas generated when the battery contained in the chamber has thermal runaway, and the first cooling channel is provided and at least a part of it is arranged adjacent to the exhaust channel, so that the high-temperature gas can be cooled by the cooling medium in the first cooling channel before being discharged, thereby reducing the temperature of the exhaust gas and improving the safety performance.

[0007] According to some embodiments of the utility model, the box body includes: a bottom plate, a first side plate, a second side plate and a crossbeam. Two first side plates are provided, and the two first side plates are spaced apart in the first direction, and the bottom of the first side plate is connected to the bottom plate. Two second side plates are provided, and the two second side plates are spaced apart in the second direction, and the bottom of the second side plate is connected to the bottom plate, and the two ends of the second side plate are respectively connected to a first side plate, and any two of the first direction, the second direction and the vertical direction are perpendicular to each other. The two ends of the crossbeam are respectively connected to a first side plate, and the crossbeam, the bottom plate, the two first side plates and one of the second side plates jointly define a chamber, the first cooling flow channel includes a first heat exchange section, the exhaust channel includes a second heat exchange section, the first heat exchange section and the second heat exchange section are separated from each other and arranged adjacently, the first heat exchange section and the second heat exchange section are both located inside the crossbeam, and the cooling medium in the first heat exchange section can cool the gas in the second heat exchange section.

[0008] According to some embodiments of the present invention, the exhaust inlet is arranged on the top surface of the bottom plate.

[0009] According to some embodiments of the utility model, the exhaust channel includes a first channel, a second channel and a third channel, the first channel is located inside the first side plate, the second channel is located inside the second side plate, and the third channel is located inside the bottom plate. The third channel is respectively connected to the exhaust inlet and the second heat exchange section, the first channel is connected to the second heat exchange section and the second channel, the second channel is connected to the exhaust outlet, and the exhaust outlet is arranged on the second side plate.

[0010] According to some embodiments of the present invention, the third channel includes multiple flow channel cavities, the flow channel cavities extend along the second direction, the multiple flow channel cavities are spaced apart along the first direction, the exhaust inlet is connected to the flow channel cavity, and one end of the flow channel cavity is connected to the second heat exchange section.

[0011] According to some embodiments of the present invention, at least two exhaust outlets are provided, the exhaust outlets are arranged on the second side plate, and at least two exhaust outlets are arranged back to back with each other.

[0012] According to some embodiments of the present invention, the box body further includes a first explosion-proof valve, and the first explosion-proof valve is installed at the exhaust outlet.

[0013] According to the second aspect of the present invention, the battery pack includes the box body of any one of the first aspect embodiments, and also includes a battery, wherein the battery is arranged in the cavity.

[0014] The battery pack according to the embodiment of the utility model has at least the following beneficial effects:

[0015] The exhaust channel of the box body is used to exhaust the gas generated when the battery contained in the chamber has thermal runaway, and the first cooling channel is provided and at least a part of it is arranged adjacent to the exhaust channel, so that the high-temperature gas can be cooled by the cooling medium in the first cooling channel before being discharged, thereby reducing the temperature of the exhaust gas and improving the safety performance of the battery pack.

[0016] According to some embodiments of the present invention, the battery includes a second explosion-proof valve, and the second explosion-proof valve is arranged opposite to the exhaust inlet.

[0017] According to some embodiments of the present invention, the battery further includes an electrode terminal, and the second explosion-proof valve and the electrode terminal are arranged back to back.

[0018] According to some embodiments of the utility model, the battery pack also includes a cooling plate, which is arranged in the chamber, the cooling plate is thermally connected to the battery, and a second cooling channel is provided in the cooling plate, and the second cooling channel is connected to the first cooling channel.

[0019] According to some embodiments of the utility model, the first cooling channel includes a first heat exchange section, the exhaust channel includes a second heat exchange section, the first heat exchange section and the second heat exchange section are separated from each other and arranged adjacently, the box body also includes a crossbeam, the first heat exchange section and the second heat exchange section are both located inside the crossbeam, and the cooling medium in the first heat exchange section can cool the gas in the second heat exchange section. The second cooling channel includes a cooling inlet and a cooling outlet, the battery pack also includes a cooling pipe, the cooling pipe includes an input pipe and an output pipe, a portion of the input pipe is located outside the box body, the input pipe is connected to the cooling inlet, the output pipe is connected to the cooling outlet, and the output pipe is also connected to the first heat exchange section.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 is a three-dimensional diagram of a battery pack in one embodiment of the utility model;

[0023] Figure 2 It is a three-dimensional diagram of a box in one embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the internal structure of a battery pack in one embodiment of the utility model;

[0025] Figure 4 A schematic diagram of a first cooling channel and a second cooling channel in one embodiment of the utility model;

[0026] Figure 5 A schematic diagram of an exhaust passage in one embodiment of the utility model;

[0027] Figure 6 It is a three-dimensional diagram of a crossbeam in one embodiment of the utility model;

[0028] Figure 7 is a cross-sectional view of a crossbeam in one embodiment of the utility model;

[0029] Figure 8 It is a three-dimensional diagram of a battery in one embodiment of the utility model.

[0030] It should be noted that Figure 4 The arrow direction in the figure indicates the flow direction of the cooling medium. Figure 5 The arrow direction indicates the gas flow direction of the gas exhaust.

[0031] Figure numerals: battery pack 100, first side plate 101, second side plate 102, first explosion-proof valve 103, box body 200, bottom plate 201, exhaust inlet 202, exhaust outlet 203, crossbeam 204, chamber 205, blank area 206, battery 301, cooling plate 302, input pipe 303, output pipe 304, connecting pipe 305, first cooling channel 401, second cooling channel 402, cooling inlet 403, cooling outlet 404, exhaust channel 500, first channel 501, second channel 502, third channel 503, channel cavity 504, first heat exchange section 601, second heat exchange section 602, first connection port 603, second connection port 604, partition 701, electrode terminal 801, second explosion-proof valve 802. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 on the present invention.

[0034] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] refer to Figures 1 to 5 According to the first embodiment of the utility model, the box 200 includes a chamber 205, an exhaust channel 500 and a first cooling channel 401. The chamber 205 is used to accommodate the battery 301, and the exhaust channel 500 includes an exhaust inlet 202 and an exhaust outlet 203. The exhaust inlet 202 is located on the inner wall of the chamber 205, and the exhaust outlet 203 is located on the outer surface of the box 200. The first cooling channel 401 is used to allow the cooling medium to flow, and at least a part of the first cooling channel 401 is arranged adjacent to at least a part of the exhaust channel 500, so that the cooling medium in the first cooling channel 401 cools the gas in the exhaust channel 500. The exhaust channel 500 is used to exhaust the gas generated when the battery 301 accommodated in the chamber 205 has a thermal runaway, and the first cooling channel 401 is arranged and at least a part of it is arranged adjacent to the exhaust channel 500, so that the high-temperature gas can be cooled by the cooling medium in the first cooling channel 401 before being discharged, thereby reducing the temperature of the exhaust gas and improving the safety performance.

[0038] It should be noted that if Figure 1 As shown, in some embodiments of the present invention, the outer surface of the box body 200 refers to the surface of the box body 200 that faces away from the chamber 205 .

[0039] It should be noted that the cooling medium can be water or common refrigerants such as Freon.

[0040] refer to Figures 4 to 6 In some embodiments of the present invention, the first cooling channel 401 and the exhaust channel 500 exchange heat in the cross beam 204. It should be noted that in some embodiments of the present invention, heat can also be exchanged in the first side plate 101 or the second side plate 102. A heat-conducting partition is set in the first side plate 101 or the second side plate 102, and then the first cooling channel 401 and the exhaust channel 500 are respectively connected to the two ends of the heat-conducting partition.

[0041] refer to Figure 2 , Figure 6 and Figure 7 In some embodiments of the present invention, the box body 200 includes: a bottom plate 201, a first side plate 101, a second side plate 102 and a crossbeam 204. Two first side plates 101 are provided, and the two first side plates 101 are spaced apart in the first direction, and the bottom of the first side plate 101 is connected to the bottom plate 201. Two second side plates 102 are provided, and the two second side plates 102 are spaced apart in the second direction, and the bottom of the second side plate 102 is connected to the bottom plate 201, and both ends of the second side plate 102 are connected to one first side plate 101, and any two of the first direction, the second direction and the vertical direction are perpendicular to each other. The two ends of the crossbeam 204 are connected to a first side plate 101 respectively. The crossbeam 204, the bottom plate 201, the two first side plates 101 and one of the second side plates 102 jointly define a chamber 205. The first cooling channel 401 includes a first heat exchange section 601, and the exhaust channel 500 includes a second heat exchange section 602. The first heat exchange section 601 and the second heat exchange section 602 are separated from each other and arranged adjacent to each other. The first heat exchange section 601 and the second heat exchange section 602 are both located inside the crossbeam 204. The cooling medium in the first heat exchange section 601 can cool the gas in the second heat exchange section 602. The crossbeam 204 is arranged inside the box body 200 to improve the structural stability and bearing capacity of the box body 200. At the same time, the crossbeam 204 can also divide the inside of the box body 200 into two areas, which is convenient for the classification and arrangement of internal components and optimizes space utilization. The first heat exchange section 601 and the second heat exchange section 602 are arranged adjacent to each other in the crossbeam 204, which makes it more convenient for the cooling medium to cool the gas. Figure 7 As shown, the cavity structure inside the crossbeam 204 can also well connect the first cooling channel 401 and the exhaust channel 500 .

[0042] It should be noted that, in some embodiments of the present invention, the two ends of the crossbeam 204 may also be connected to the two ends of the second side plate 102 respectively, and the specific placement method may be adjusted according to actual usage requirements.

[0043] It should be noted that if Figure 6 and Figure 7As shown, in some embodiments of the present invention, the first heat exchange section 601 and the second heat exchange section 602 are separated from each other and arranged adjacently, which means that the beam 204 is separated from the first heat exchange section 601 by a partition 701, so that the cooling medium in the first heat exchange section 601 and the gas in the second heat exchange section 602 will not directly contact or mix. The partition 701 can be made of a material with high thermal conductivity, and the material used for the partition 701 is thermal conductive silica gel, which can improve the thermal conductivity efficiency and improve the cooling effect of the cooling medium on the gas in the second heat exchange section 602.

[0044] It should be noted that in some embodiments of the present invention, the first side plate 101, the second side plate 102 and the crossbeam 204 are made of aluminum, which is light in weight, high in strength, strong in impact resistance, and has good thermal conductivity.

[0045] It should be noted that the reference Figure 2 In some embodiments of the utility model, in addition to the chamber 205 inside the box body 200, the crossbeam 204 also divides the inside of the box body 200 into a blank area 206 together with another second side plate 102, two first side plates 101, and the bottom plate 201. This position is used to place components such as BDU (battery disconnect unit) and BMS (battery management system), which can improve the space utilization inside the box body 200 and make the structure more compact.

[0046] refer to Figure 3 In some embodiments of the present invention, the exhaust inlet 202 is disposed on the top surface of the bottom plate 201. This can adapt to the battery 301 with an explosion-proof valve disposed at the bottom, and the exhaust inlet 202 is disposed on the top surface of the bottom plate 201 to further utilize the space inside the bottom plate 201. After the gas is discharged into the bottom plate 201, it can extend to the first side plate 101 and the second side plate 102, and the distribution in structure is more reasonable.

[0047] refer to Figure 5 and Figure 6 In some embodiments of the present utility model, the exhaust channel 500 includes a first channel 501, a second channel 502 and a third channel 503. The first channel 501 is located inside the first side plate 101, the second channel 502 is located inside the second side plate 102, and the third channel 503 is located inside the bottom plate 201. The third channel 503 is communicated with the exhaust inlet 202 and the second heat exchange section 602 respectively. The first channel 501 is communicated with the second heat exchange section 602 and the second channel 502. The second channel 502 is communicated with the exhaust outlet 203, and the exhaust outlet 203 is provided on the second side plate 102.

[0048] The specific exhaust path of the gas during thermal runaway is as follows: the gas enters the third channel 503 of the bottom plate 201 from the exhaust inlet 202, and the third channel 503 passes through Figure 6 The second connection port 604 shown enters the second heat exchange section 602 in the crossbeam 204, and then flows from the second heat exchange section 602 to the first channel 501 in the first side plates 101 at both ends, and then flows from the first channel 501 to the second channel 502 in the second side plate 102, and finally discharged from the exhaust outlet 203. Such a design makes full use of the interlayer in the structure of the box body 200 to realize gas discharge, and no additional pipeline is required. In addition, during the discharge process, the gas will first pass through the second heat exchange section 602 for heat exchange and cooling, which can also improve safety.

[0049] refer to Figure 5 In some embodiments of the present invention, the third channel 503 includes a plurality of flow channel cavities 504, the flow channel cavities 504 extend along the second direction, the plurality of flow channel cavities 504 are spaced apart along the first direction, the exhaust inlet 202 is connected to the flow channel cavity 504, and one end of the flow channel cavity 504 is connected to the second heat exchange section 602. The flow channel cavity 504 can further narrow the scope of the third channel 503, define the exhaust path of the gas, and improve the exhaust efficiency of the gas. The plurality of flow channel cavities 504 spaced apart along the first direction can meet the needs of the plurality of exhaust inlets 202, so that each exhaust inlet 202 is connected to the flow channel cavity 504, and the extension of the flow channel cavity 504 along the second direction can enable the gas to reach the crossbeam 204 as soon as possible, thereby realizing rapid exhaust.

[0050] refer to Figure 5 In some embodiments of the present invention, at least two exhaust outlets 203 are provided, and the exhaust outlets 203 are arranged on the second side plate 102, and at least two exhaust outlets 203 are arranged back to back. In this way, the gas can be discharged through multiple channels, thereby improving the discharge efficiency. At the same time, the exhaust outlet 203 is arranged on the first side plate 101, which can also match the direction of the gas in some embodiments of the present invention. The gas flows from the crossbeam 204 to the first side plate 101, and then flows to the second side plates 102 at both ends, and can be naturally discharged from the exhaust outlets 203 arranged on the second side plate 102.

[0051] It should be noted that the reference Figure 5 In some embodiments of the present invention, four exhaust outlets 203 are provided, and two second side panels 102 are each provided with two exhaust outlets 203, which can further improve the gas exhaust efficiency and avoid damage to the internal structure of the box body 200 caused by too slow gas exhaust.

[0052] refer to Figure 1In some embodiments of the present invention, the box 200 further includes a first explosion-proof valve 103, which is installed at the exhaust outlet 203. The first explosion-proof valve 103 can improve the overall safety performance of the box 200. When the air pressure on the first explosion-proof valve 103 is greater than a preset value during thermal runaway, the first explosion-proof valve 103 will automatically open for release. In normal times, the first explosion-proof valve 103 also has the properties of waterproof, dustproof, and oil-proof, ensuring that the exhaust outlet 203 will not be polluted or blocked by the outside world, thereby ensuring the exhaust performance of the box 200.

[0053] refer to Figure 1 and Figure 3 According to the battery pack 100 of the second embodiment of the utility model, the battery pack 100 includes the box body 200 of any one of the first embodiment, and also includes a plurality of batteries 301, and the batteries 301 are arranged in the chamber 205. The exhaust channel 500 of the box body 200 is used to exhaust the gas generated when the battery 301 contained in the chamber 205 has a thermal runaway, and the first cooling channel 401 is provided and at least a part of it is arranged adjacent to the exhaust channel 500, so that the high-temperature gas can be cooled by the cooling medium in the first cooling channel 401 before being discharged, thereby reducing the temperature of the exhaust gas and improving the safety performance of the battery pack 100.

[0054] refer to Figure 3 , Figure 5 and Figure 8 In some embodiments of the present invention, the battery pack 100 includes a second explosion-proof valve 802, and the second explosion-proof valve 802 is arranged opposite to the exhaust inlet 202. The second explosion-proof valve 802 can improve the safety performance of the battery 301. When the air pressure on the second explosion-proof valve 802 is greater than the preset value during thermal runaway, it will automatically open and release. In normal times, the second explosion-proof valve 802 also has the properties of waterproof, dustproof and oil-proof, ensuring that the battery 301 will not be polluted or blocked by the outside world, and ensuring the exhaust performance of the battery 301. The second explosion-proof valve 802 and the exhaust inlet 202 are arranged opposite to each other, and the gas can flow into the exhaust inlet 202 as soon as possible when the battery 301 has thermal runaway, thereby improving the exhaust efficiency and safety performance.

[0055] It should be noted that, in some embodiments of the present invention, a sealing ring is further provided between the exhaust inlet 202 and the second explosion-proof valve 802 to further improve the sealing performance of the connection to ensure that the gas can smoothly enter the exhaust channel 500 and avoid gas leakage.

[0056] refer to Figure 8In some embodiments of the present invention, the battery 301 further includes an electrode terminal 801, and the second explosion-proof valve 802 is arranged opposite to the electrode terminal 801. The electrode terminal 801 and the second explosion-proof valve 802 are arranged opposite to each other, which can make more reasonable distribution and utilization of the internal structure of the battery 301, on the one hand, prevent the discharged high-temperature gas from damaging the electrical connection components such as cables and connecting bars, and on the other hand, prevent the above-mentioned electrical connection components from obstructing the exhaust.

[0057] refer to Figure 4 In some embodiments of the present invention, the battery pack 100 further includes a cooling plate 302, which is disposed in the chamber 205, and is thermally connected to the battery 301. A second cooling channel 402 is disposed in the cooling plate 302, and the second cooling channel 402 is connected to the first cooling channel 401. The cooling plate 302 can cool the battery 301, and at the same time, connecting the second cooling channel 402 in the cooling plate 302 with the first cooling channel 401 of the box 200 can simplify the structure of the pipeline for conveying the cooling medium of the battery pack, and it is not necessary to set up two independent pipeline systems to convey the cooling medium to the cooling plate and the box.

[0058] It should be noted that the reference Figure 4 In some embodiments of the utility model, a plurality of cooling plates 302 are provided, and the plurality of cooling plates 302 are spaced apart along the second direction, and the battery 301 is placed between the cooling plates 302. This can further increase the heat exchange area between the cooling plates 302 and the battery 301, enhance the cooling effect on the battery 301, and thus improve the overall performance of the battery pack 100.

[0059] refer to Figure 4 , Figure 6 and Figure 7 In some embodiments of the present invention, the second cooling channel 402 includes a cooling inlet 403 and a cooling outlet 404, the battery pack 100 also includes a cooling pipe, the cooling pipe includes an input pipe 303 and an output pipe 304, a portion of the input pipe 303 is located outside the box 200, the input pipe 303 is connected to the cooling inlet 403, the output pipe 304 is connected to the cooling outlet 404, and the output pipe 304 is also connected to the first heat exchange section 601. The input pipe 303 and the output pipe 304 are respectively connected to the cooling inlet 403 and the cooling outlet 404 so that the cooling medium can flow from the cooling inlet 403 to the cooling outlet 404 and thus pass through the entire cooling plate 302, thereby achieving heat exchange and cooling of the batteries 301 on both sides of the cooling plate 302. Reference Figure 7 The output pipe 304 is connected to the first heat exchange section 601 through the first connecting port 603 , so that the second cooling channel 402 is connected to the first heat exchange section 601 , and the cooling medium can smoothly enter the first heat exchange section 601 to cool the gas in the second heat exchange section 602 .

[0060] It should be noted that the reference Figure 3 and Figure 4 In some embodiments of the present invention, the battery pack also includes a connecting tube 305, one end of which is connected to the first heat exchange section 601 in the beam 204, and a part of the other end is located outside the box 200, so that the cooling medium can be discharged smoothly after circulating in the box 200.

[0061] refer to Figure 4 In some embodiments of the present invention, the specific circulation path of the cooling medium is as follows: the cooling medium enters from the input pipe 303, then flows through the cooling inlet 403 of each cooling plate 302, flows through the entire cooling plate 302, and then flows from the cooling outlet 404 to the output pipe 304, and finally converges and flows to the first heat exchange section 601 in the beam 204, and finally is discharged from the connecting pipe 305.

[0062] It should be noted that in some embodiments of the present invention, the output pipe 304 and the input pipe 303 are formed by splicing and installation, so that one section of the pipe can be sealed and connected to the surface of one side of the cooling plate 302, and then the other section of the pipe can be sealed and connected to the surface of the other side of the cooling plate 302. The alternating installation and molding are carried out to realize the assembly of the entire second cooling channel 402, which can ensure that each connection point has good sealing performance and avoid leakage of the cooling medium. In addition, the splicing and installation molding can also be assembled together using different numbers of short pipes according to actual needs, thereby improving the usage scenarios.

[0063] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. Box body, characterized in that, The box body comprises: a chamber for accommodating a battery; An exhaust passage, the exhaust passage comprising an exhaust inlet and an exhaust outlet, the exhaust inlet being located on the inner wall surface of the chamber, and the exhaust outlet being located on the outer surface of the box body; The first cooling channel is used for allowing a cooling medium to flow, and at least a portion of the first cooling channel is disposed adjacent to at least a portion of the exhaust channel so that the cooling medium in the first cooling channel cools the gas in the exhaust channel.

2. The box according to claim 1, characterized in that: The box body comprises: Base plate; A first side plate, wherein two first side plates are provided, the two first side plates are spaced apart in a first direction, and the bottom of the first side plate is connected to the bottom plate; A second side panel, wherein two second side panels are provided, and the two second side panels are spaced apart in the second direction, the bottom of the second side panel is connected to the bottom panel, and both ends of the second side panel are respectively connected to one of the first side panels, and any two of the first direction, the second direction and the vertical direction are perpendicular to each other; A crossbeam, each end of which is connected to one of the first side plates, the crossbeam, the bottom plate, the two first side plates and one of the second side plates together define the chamber, the first cooling channel includes a first heat exchange section, the exhaust channel includes a second heat exchange section, the first heat exchange section and the second heat exchange section are separated from each other and arranged adjacent to each other, the first heat exchange section and the second heat exchange section are both located inside the crossbeam, and the cooling medium in the first heat exchange section can cool the gas in the second heat exchange section.

3. The box according to claim 2, characterized in that: The exhaust inlet is arranged on the top surface of the bottom plate.

4. The box according to claim 3, characterized in that: The exhaust channel comprises a first channel, a second channel and a third channel, the first channel is located inside the first side plate, the second channel is located inside the second side plate, and the third channel is located inside the bottom plate; The third channel is in communication with the exhaust gas inlet and the second heat exchange section, the first channel is in communication with the second heat exchange section and the second channel, and the second channel is in communication with the exhaust gas outlet; The exhaust outlet is provided on the second side plate.

5. The box according to claim 4, characterized in that: The third channel includes a plurality of flow channel cavities, the flow channel cavities extend along the second direction, and the plurality of flow channel cavities are spaced apart and distributed along the first direction; The exhaust inlet is in communication with the flow channel cavity, and one end of the flow channel cavity is in communication with the second heat exchange section.

6. The box according to claim 2, characterized in that: At least two exhaust outlets are provided, and the exhaust outlets are arranged on the second side plate, and at least two exhaust outlets are arranged to face away from each other.

7. The box according to claim 1, characterized in that: The box body further comprises a first explosion-proof valve, which is installed at the exhaust outlet.

8. A battery pack, characterized in that: include: The box as claimed in any one of claims 1 to 7; A battery is disposed in the chamber.

9. The battery pack according to claim 8, characterized in that: The battery comprises a second explosion-proof valve, and the second explosion-proof valve is arranged opposite to the exhaust inlet.

10. The battery pack according to claim 9, characterized in that: The battery further includes an electrode terminal, and the second explosion-proof valve and the electrode terminal are arranged back to back.

11. The battery pack according to claim 8, characterized in that: The battery pack further includes a cooling plate, which is disposed in the chamber and is thermally connected to the battery. A second cooling channel is disposed in the cooling plate, and the second cooling channel is communicated with the first cooling channel.

12. The battery pack according to claim 11, characterized in that: The first cooling flow channel includes a first heat exchange section, the exhaust channel includes a second heat exchange section, the first heat exchange section and the second heat exchange section are separated from each other and arranged adjacent to each other, the box body also includes a crossbeam, the first heat exchange section and the second heat exchange section are both located inside the crossbeam, and the cooling medium in the first heat exchange section can cool the gas in the second heat exchange section; The second cooling channel includes a cooling inlet and a cooling outlet, the battery pack also includes a cooling pipe, the cooling pipe includes an input pipe and an output pipe, a portion of the input pipe is located outside the box, the input pipe is connected to the cooling inlet, the output pipe is connected to the cooling outlet, and the output pipe is also connected to the first heat exchange section.

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