Battery module, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery module, a battery pack and electric equipment. The battery module comprises an upper cover, a battery cell, a battery cell bracket and an exhaust shell, an anti-explosion valve is arranged on one side, close to the upper cover, of each battery cell, the battery cell brackets and the battery cells are alternately arranged, an air cooling channel is defined by the battery cell brackets and the battery cells, and the air cooling channel is used for introducing cold air; the exhaust shell is arranged on one side, close to the upper cover, of the battery cell and the battery cell bracket; the exhaust shell is provided with an exhaust cavity, the exhaust cavity is provided with a plurality of air inlets, a plurality of first air inlets and an exhaust port used for guiding out air in the exhaust cavity, and the first air inlets can be selectively opened; and under the condition that cold air is introduced into the air cooling channel, the first air inlet is opened, and the exhaust cavity communicates with the air cooling channel through the first air inlet. According to the battery module, the concentration ratio of a high-temperature gas discharge path in the anti-explosion valve is improved, and meanwhile, by introducing cold air into the air cooling channel, the exhaust speed is increased, and the initiative of the exhaust process is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery module, battery pack, and electrical equipment. Background Technology

[0002] With the development of new energy technologies, battery packs are widely used in various electrical devices. To improve the safety of battery packs during use, explosion-proof valves are installed on the battery cells in the battery pack. These valves release the high-temperature gas generated inside the cell in the event of abnormal pressure rise or thermal runaway, preventing the cell from exploding.

[0003] In related technologies, the exhaust path of high-temperature gas in the explosion-proof valve is relatively dispersed and the exhaust process is relatively passive, which leads to low exhaust efficiency and makes it easy for high-temperature gas to come into contact with the battery cell and damage it. Utility Model Content

[0004] This application aims to provide a battery module, battery pack, and electrical equipment to solve the problem that the exhaust path of high-temperature gas is relatively dispersed and the exhaust process is relatively passive during the exhaust process of explosion-proof valves.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a battery module having a first direction, a second direction and a third direction that intersect each other in pairs. The battery module includes: a top cover, a battery cell, a battery cell bracket and an exhaust housing.

[0007] An explosion-proof valve is provided on the side of the battery cell near the top cover along the first direction. There are multiple battery cell supports and multiple battery cells, which are alternately arranged along the second direction. Multiple battery cell supports and multiple battery cells form multiple air-cooling channels, which are used to introduce cold air. The exhaust housing is provided on the side of the battery cell and the battery cell support near the top cover along the first direction.

[0008] The exhaust housing has an exhaust chamber, and the exhaust housing is respectively provided with an air inlet, a first air inlet and an exhaust port that communicate with the exhaust chamber. The explosion-proof valve is provided with a valve port, and the air inlet and the valve port correspond one-to-one. The exhaust chamber and the valve port are connected through the air inlet. The air-cooling channel corresponds one-to-one with and communicates with the first air inlet. The exhaust housing is also provided with a switch, and the switch is movably connected to the exhaust housing to close or open the first air inlet.

[0009] Optionally, the switching element includes two switch pieces, which are respectively disposed on opposite sides of the first air inlet along the second direction or the third direction, and are rotatably connected to the exhaust housing; the two switch pieces rotate towards each other to close the first air inlet, and rotate away from each other to open the first air inlet.

[0010] Optionally, the exhaust housing includes a housing body and a sealing element. The housing body is disposed on the side of the battery cell and the battery cell support along the first direction near the top cover and is connected to the battery cell support. The sealing element is connected to the side of the housing body near the battery cell and surrounds the housing body to form the exhaust chamber. The switching element is movably connected to the housing body.

[0011] Optionally, the air inlet and the first air inlet are disposed on the sealing element, and the exhaust port is disposed on the housing body.

[0012] Optionally, the housing body includes a first body and a second body, the first body is connected to the cell support, the second body is connected to the side of the first body away from the cell support along the first direction, the switch is movably connected to the first body, and the exhaust port is disposed on the second body.

[0013] Optionally, the exhaust housing is provided with an exhaust pipe, the exhaust pipe is located on the side of the exhaust housing away from the battery cell, the exhaust port is located at the end of the exhaust pipe away from the exhaust housing, the exhaust pipe passes through the top cover and is exposed outside the top cover.

[0014] Optionally, the cell support includes a support body and a compression member. The support body includes an isolation plate disposed opposite to the cell along the second direction. The compression member is connected to the isolation plate and abuts against the cell to form the air-cooling channel with the isolation plate and the cell. The air-cooling channel has an air outlet. When cold air is introduced into the air-cooling channel, the switch is opened to open the first air inlet. The cold air in the air-cooling channel enters the exhaust chamber sequentially through the air outlet and the first air inlet.

[0015] Optionally, the bracket body further includes two bracket side plates, which are disposed on opposite sides of the isolation plate along the third direction. A second air inlet is provided on the bracket side plate, which is connected to the air-cooling channel to introduce cold air into the air-cooling channel.

[0016] Optionally, the compression component includes two flow guides, one of which, together with a bracket side plate, an isolation plate, and a battery cell, forms a cooling channel.

[0017] Optionally, the compression component further includes a weight-reducing section disposed between the two flow guide sections.

[0018] Optionally, the exhaust housing is provided with a first fixing part, and the cell support is provided with a second fixing part, wherein the first fixing part is connected to the second fixing part to connect the exhaust housing to the cell support.

[0019] Secondly, this application also discloses a battery pack, including a housing, a cover plate, and a battery module as described above. The housing is provided with a receiving cavity, the receiving cavity has an opening, the battery module is disposed in the receiving cavity, and the cover plate is connected to the housing and seals the opening. The battery module is spaced from the inner wall of the housing, and the space is used to form an air intake channel.

[0020] Thirdly, this application also discloses an electrical device, which includes a battery module or battery pack as described above.

[0021] In this embodiment, the exhaust housing has an exhaust chamber with multiple air inlets and multiple first air inlets. The exhaust chamber is connected to the valve port of the explosion-proof valve through the air inlets. The first air inlets can be selectively closed. When the first air inlets are open, the exhaust chamber is connected to the air-cooling channel through the first air inlets. When the explosion-proof valve releases high-temperature gas, the high-temperature gas can flow into the exhaust chamber through the air inlets. At this time, when cold air is introduced into the air-cooling channel, the first air inlets can be opened, and the cold air in the air-cooling channel can flow into the exhaust chamber through the first air inlets. This not only prevents high-temperature gas from flowing back into the air-cooling channel through the first air inlets and damaging the battery cell, but the intervention of cold air can also accelerate the exhaust speed and improve the exhaust efficiency, thereby enhancing the initiative of the exhaust valve and ensuring the safety of the battery module. When no cold air is introduced into the air-cooling channel, the first air inlets remain closed. At this time, the air-cooling channel and the exhaust chamber cannot be connected, and high-temperature gas cannot flow back into the air-cooling channel through the first air inlets and damage the battery cell. According to the above battery module, the high-temperature gas released by the explosion-proof valve can be concentratedly discharged into the exhaust chamber through the air inlet and discharged through the exhaust outlet. The high-temperature gas will not flow back into the air-cooling channel and damage the battery cell, thus improving the concentration of the high-temperature gas emission path. At the same time, the exhaust speed can be increased by introducing cold air into the air-cooling channel, thereby improving the initiative of the exhaust process. In this way, the safety of the battery module is effectively guaranteed.

[0022] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the battery module structure in an embodiment of this application;

[0025] Figure 2 This is an exploded view of the battery module in an embodiment of this application;

[0026] Figure 3 This is a top view of the battery module structure in an embodiment of this application;

[0027] Figure 4 yes Figure 3 Enlarged diagram of section A in the middle;

[0028] Figure 5 This is an exploded schematic diagram of the exhaust casing in an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the exhaust housing in the open state in an embodiment of this application;

[0030] Figure 7 yes Figure 6 Enlarged schematic diagram of section B in the middle;

[0031] Figure 8 This is a schematic diagram of the exhaust housing in the closed state in an embodiment of this application;

[0032] Figure 9 yes Figure 8 Enlarged diagram of section C;

[0033] Figure 10 This is a schematic diagram of the structure of the battery cell support in the embodiments of this application;

[0034] Figure 11 This is a front view of the battery cell support in an embodiment of this application;

[0035] Figure 12 This is a side view of the cell support in an embodiment of this application;

[0036] Figure 13 This is a top view of the cell support in an embodiment of this application.

[0037] Reference numerals: 100 - Battery module, 10 - Battery cell, 11 - Explosion-proof valve, 20 - Battery cell bracket, 201 - Air-cooled channel, 2011 - Air outlet, 21 - Bracket body, 211 - Isolation plate, 212 - Bracket side plate, 2121 - Second air inlet, 22 - Compressor, 221 - Guide section, 222 - Weight reduction section, 23 - Second fixing section, 30 - Exhaust housing, 301 - Exhaust chamber, 302 - Air inlet, 303 - First air inlet, 3 04 - Exhaust port, 305 - Exhaust pipe, 31 - Housing body, 311 - First body, 312 - Second body, 313 - First fixing part, 32 - Switching element, 321 - Switch piece, 33 - Sealing element, 34 - Fastener, 40 - Top cover, 41 - Data acquisition line, 42 - Pole post, 43 - Electrical isolation plate, 44 - Busbar, 50 - End plate, 51 - Insulation plate, 60 - Side plate, x - First direction, y - Second direction, z - Third direction. Detailed Implementation

[0038] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] With the development of new energy technologies, battery packs are widely used in various electrical devices. To improve the safety of battery packs during use, explosion-proof valves are installed on the battery cells. These valves release high-temperature gases generated inside the cell in the event of abnormal pressure increases or thermal runaway, preventing cell explosions. However, in related technologies, the exhaust path of the high-temperature gases during the venting process is relatively dispersed and the process is passive, resulting in low venting efficiency. This allows the high-temperature gases to easily contact the battery cells and damage them.

[0043] Based on the aforementioned problems of battery packs, this application provides a battery module. The battery module provided by this application not only improves the concentration of the high-temperature gas emission path in the explosion-proof valve, but also increases the exhaust speed and enhances the initiative of the exhaust process by introducing cold air into the air-cooling channel. In addition, when cold air is not introduced into the air-cooling channel, the first air inlet is closed, which can also prevent high-temperature gas from flowing back into the air-cooling channel and damaging the battery cells, thereby improving the safety of the battery module.

[0044] The battery module in this application will be further described in detail below with reference to the accompanying drawings and specific embodiments, such as... Figure 1 and Figure 2 As shown, the battery module provided in this application embodiment has a first direction x, a second direction y, and a third direction z that intersect each other in pairs, wherein the first direction x is the height direction of the battery module, and the second direction y and the third direction z are the length or width directions of the battery module, respectively.

[0045] Reference Figure 1 , Figure 2 The diagram shows a structural schematic of the battery module 100 in an embodiment of this application, as shown below. Figure 1 and Figure 2As shown, the battery module 100 includes: a top cover 40, a battery cell 10, a battery cell support 20, and an exhaust housing 30; an explosion-proof valve 11 is provided on the side of the battery cell 10 near the top cover 40 along the first direction x; the number of battery cell supports 20 and battery cells 10 are both multiple and are alternately arranged along the second direction y; the battery cell supports 20 and battery cells 10 enclose each other to form a cooling channel 201, which is used to introduce cold air; the exhaust housing 30 is provided on the side of the battery cell 10 and battery cell support 20 near the top cover 40 along the first direction x; the exhaust housing 30 has an exhaust chamber 301, and the exhaust housing 30 is provided with multiple air inlets 302 communicating with the exhaust chamber 301, multiple first air inlets 303, and a vent for the exhaust chamber 301. The exhaust port 304 is used to vent the gas inside 301. The exhaust chamber 301 is connected to the valve port of the explosion-proof valve 11 through the air inlet 302. The exhaust housing 30 is also provided with a switch 32 at the position where the first air inlet 303 is opened. The switch 32 is movably connected to the exhaust housing 30 to selectively open the first air inlet 303. When cold air is introduced into the air-cooling channel 201, the switch 32 is opened to open the first air inlet 303. The cold air in the air-cooling channel 201 enters the exhaust chamber 301 through the first air inlet 303. When cold air is not introduced into the air-cooling channel 201, the switch 32 is closed and the first air inlet 303 is sealed. The exhaust port 304 is at least partially exposed on the upper cover 40.

[0046] Specifically, the battery module 100 also includes an end plate 50 and a side plate 60. The end plate 50 and the side plate 60 are connected to both sides of the battery module 100 along the second direction y and the third direction z, respectively. The end plate 50, the side plate 60, and the top cover 40 together form the outer frame of the battery module 100, and the interior encloses a cavity for installing the battery cell 10. The outer frame protects and fixes the battery cell 10 inside. When the battery module 100 is subjected to external impact, the outer frame can withstand a certain pressure to prevent the battery cell 10 inside from being deformed or damaged by the impact. An insulating plate 51 is also provided between the end plate 50 and the battery cell 10 to prevent direct contact between the battery cell 10 and the end plate 50 and short circuit, thereby improving the safety of the battery pack. In addition, the insulating plate 51 can further enhance the structural strength of the battery module 100. Furthermore, since the cell support 20 is equipped with a second air inlet 2121 for cold air entry, in order to meet the air intake conditions of the second air inlet 2121, the side plate 60 is provided with a through hole opposite to the second air inlet 2121 to allow cold air to enter the air-cooling channel 201. Further, the top cover 40 also integrates structures such as terminals 42, busbars 44, data acquisition lines 41, and electrical isolation plates 43. The busbars 44 are electrically connected to the electrode terminals of each cell 10 to achieve series or parallel connection between the cells 10, thereby effectively outputting current. The cells 10 are connected in series or parallel to each other and ultimately form the terminals 42 of the battery module 100. The data acquisition lines 41 are equipped with data acquisition terminals connected to the cells 10 to collect operating parameters such as voltage, current, and temperature of the cells 10, providing a basis for the battery management system to adjust the operating state of the battery module 100. The electrical isolation plates 43 can prevent short circuits between different data acquisition lines 41, improving the safety of the battery module 100.

[0047] In this embodiment, the exhaust housing 30 has an exhaust chamber 301, which is provided with an air inlet 302 and a first air inlet 303. The exhaust chamber 301 is connected to the valve port of the explosion-proof valve 11 through the air inlet 302. The first air inlet 303 can be selectively closed. When the first air inlet 303 is open, the exhaust chamber 301 is connected to the air-cooling channel 201 through the first air inlet 303. When the explosion-proof valve 11 releases high-temperature gas, the gas can flow into the exhaust chamber 301 through the air inlet 302. At this time, when cold air is introduced into the air-cooling channel 201, the first air inlet 303 can be opened, and the cold air in the air-cooling channel 201 can flow into the exhaust chamber 301 through the first air inlet 303. This not only prevents the high-temperature gas from flowing back into the air-cooling channel 201 through the first air inlet 303 and damaging the battery cell 10, but the intervention of the cold air can also accelerate the exhaust speed and improve the exhaust efficiency, thereby enhancing the initiative of the exhaust valve and ensuring the safety of the battery module 100. In practical applications, when the battery cell 10 is in a thermal runaway state, the high-temperature gas enters the exhaust chamber 301 through the valve port and air inlet 302 of the explosion-proof valve 11. At this time, the first air inlet 303 can be opened by introducing cold air into the air-cooling channel 201, and the cold air further enters the exhaust chamber 301 through the first air inlet 303, thereby improving the exhaust speed and the initiative of the exhaust. Furthermore, when the battery module 100 lacks ventilation, that is, when the air-cooling channel 201 is not ventilated, the first air inlet 303 can be kept closed. At this time, the air-cooling channel 201 and the exhaust chamber 301 cannot be connected, and the high-temperature gas cannot flow back to the air-cooling channel 201 through the first air inlet 303 and damage the battery cell 10. In this way, the safety of the battery module 100 is effectively guaranteed.

[0048] In this embodiment, the air inlet 302 corresponds one-to-one with the valve port of the explosion-proof valve 11, and the air-cooling channel 201 corresponds one-to-one with the first air inlet 303. Understandably, since there are multiple battery cell supports 20 and multiple battery cells 10 in this embodiment, and they are alternately arranged along the second direction y, there are also multiple valve ports of the explosion-proof valve 11. Multiple battery cell supports 20 and multiple battery cells 10 enclose multiple air-cooling channels 201, and correspondingly, there are also multiple air inlets 302 and multiple first air inlets 303.

[0049] Optionally, the switch 32 includes two switch pieces 321, which are respectively disposed on opposite sides of the first air inlet 303 along the second direction y or the third direction z, and are rotatably connected to the exhaust housing 30; the two switch pieces 321 rotate towards each other to close the first air inlet 303, and rotate away from each other to open the first air inlet 303.

[0050] Specifically, such as Figures 3 to 9As shown, in this embodiment of the application, the first air inlet 303 is a rectangular structure, and its length is set along the third direction z. To match the length of the first air inlet 303, two switch pieces 321 are arranged opposite each other along the third direction z and are rotatably connected to the inner wall of the exhaust housing 30. When the two switch pieces 321 rotate towards each other to be parallel to the exhaust housing 30, the two switch pieces 321 can block the first air inlet 303. When designing the size of the switch pieces 321, it should be ensured that they block the first air inlet 303 and are not exposed to the air inlet 302, so as to avoid the switch piece 32 from being accidentally opened when airflow passes through the air inlet 302.

[0051] In practical applications, the fan can be connected to the exhaust chamber 301, and the two switch pieces 321 can be rotatably connected to the exhaust housing 30. When the fan is on, a negative pressure is formed in the exhaust chamber 301, and the switch pieces 321 rotate toward the exhaust chamber 301 and open the first air inlet 303. At the same time, air from outside the battery module 100 is drawn into the air-cooling channel 201 and enters the exhaust chamber 301 through the first air inlet 303. The airflow in the air-cooling channel 201 cools the battery cell 10 and also carries away the high-temperature gas discharged from the explosion-proof valve 11, increasing the exhaust speed. Alternatively, the fan can be placed outside the battery module 100 and used to supply air into the air-cooling channel 201. In this case, the cold airflow formed in the air-cooling channel 201 can push open the switch pieces 321 and enter the exhaust chamber 301, achieving the functions of heat dissipation and increasing the exhaust speed of high-temperature gas. When the fan is not on, there is no cold airflow in the air-cooling channel, and the switch pieces 321 automatically reset and close the first air inlet 303. The aforementioned switch 32 can automatically open and close by airflow. The control method is simple, and this mechanical control structure is more reliable than electronic control and is also easier to maintain and replace.

[0052] It should be noted that when using a fan for air intake cooling, the air cooling channel 201 of the battery module 100 is generally designed to be connected to the vehicle passenger compartment to draw in air from the passenger compartment to form cooling air. In this case, by setting up an exhaust casing 30 to centrally discharge high-temperature gas, it is also possible to prevent high-temperature gas from flowing back and spreading to the passenger compartment, thereby reducing the risk of vehicle occupants in the passenger compartment and ensuring passenger safety.

[0053] like Figure 5As shown, the exhaust housing 30 includes a housing body 31 and a sealing member 33. The housing body 31 is disposed on the side of the battery cell 10 and the battery cell support 20 along the first direction x near the upper cover 40 and is connected to the battery cell support 20. The sealing member 33 is connected to the side of the housing body 31 near the battery cell 10. Further, the sealing member 33 is connected between the housing body 31 and the battery cell 10 and the battery cell support 20, and surrounds the housing body 31 to form an exhaust chamber 301. The switch member 32 is movably connected to the housing body 31. The sealing member 33 is used to seal the exhaust chamber 301 to prevent external air from entering the exhaust chamber 301 through the gaps between the housing body 31 and the battery cell support 20 and between the housing body 31 and the battery cell 10, thus affecting the opening and closing state of the first air inlet 303 and the exhaust path of the high-temperature gas.

[0054] The exhaust housing 30 is provided with a first fixing part 313, and the cell support 20 is provided with a second fixing part 23. The first fixing part 313 is connected to the second fixing part 23 to connect the exhaust housing 30 to the cell support 20. Specifically, the first fixing part 313 extends outward from both sides of the exhaust housing 30 along the third direction z and is provided with a first fixing hole. The cell support 20 is provided with two second fixing parts 23, each of which is provided with a second fixing hole. Fasteners 34 pass through the first fixing holes and are fixed in the second fixing holes to connect the exhaust housing 30 to the cell support 20. The sealing element 33 can be a rubber sealing element, a silicone sealing element, a resin sealing element, etc., and this application does not specifically limit it. It should be noted that since a high-temperature gas exhaust path is formed inside the exhaust housing 30, the high-temperature resistance should also be considered when selecting the sealing element 33.

[0055] In practical applications, the air inlet 302 and the first air inlet 303 can be located on the housing body 31 or on the sealing element 33. This application does not make any specific limitation on this.

[0056] In this embodiment, the air inlet 302 and the first air inlet 303 are disposed on the sealing member 33, and the exhaust port 304 is disposed on the housing body 31. Specifically, as shown... Figure 5 As shown, along the length of the seal 33, the air inlet 302 and the first air inlet 303 are alternately arranged. The switch 32 is movably connected to the housing body 31 and is correspondingly arranged with the first air inlet 303. The housing body 31 only needs to be provided with a top plate and an annular side plate. In practical applications, since the structure of the seal 33 is simpler, setting the air inlet 302 and the first air inlet 303 on the seal 33 makes the processing of the air inlet 302 and the first air inlet 303 simpler. In addition, by setting the air inlet 302 and the first air inlet 303 on the seal 33, the top plate and the annular side plate in the housing body 31 can directly form the exhaust chamber 301, simplifying the structure of the housing body 31 and making the processing of the housing body 31 easier.

[0057] Furthermore, the housing body 31 includes a first body 311 and a second body 312. The first body 311 is connected to the cell support 20, and the second body 312 is connected to the side of the first body 311 away from the cell support 20 along the first direction x. The switch 32 is movably connected to the first body 311, and the exhaust port 304 is disposed on the second body 312.

[0058] In this embodiment, the first body 311 can be designed as a ring structure and serve as a side plate. The first body 311 has openings on both sides along the first direction x. The second body 312 is a flat plate structure and serves as a top plate. The second body 312 is connected to one side of the first body 311 and blocks the opening on that side. The sealing member 33 is connected to the other side of the first body 311 and is connected to the cell support 20.

[0059] Understandably, this split-structure design of the shell body 31, compared to a one-piece molded shell body 31, allows the first body 311 and the second body 312 to be manufactured separately and then assembled, reducing production difficulty and thus facilitating the control of manufacturing precision. In practical applications, the first body 311 and the second body 312 can be metal structures, and the connection between them can be achieved through welding. To ensure the sealing of the connection, sealant can also be added at the connection point.

[0060] Optionally, such as Figure 5 As shown, the second body 312 is provided with an exhaust pipe 305. One end of the exhaust pipe 305 is connected to the second body 312, and the other end passes through the upper cover 40. The exhaust port 304 is provided at the end of the exhaust pipe 305 away from the upper cover 40, and the exhaust port 304 is exposed outside the upper cover 40.

[0061] In specific applications, for example, the exhaust port 304 can be used to connect to an exhaust device to collect the gas in the exhaust chamber 301 through the exhaust pipe 305. In this example, the exhaust port 304 is exposed outside the upper cover 40, which facilitates connection with the exhaust device. Alternatively, since the exhaust pipe 305 passes through the upper cover 40 and the exhaust port is exposed outside the upper cover 40, the exhaust pipe 305 can also communicate with the outside atmosphere through the exhaust port 304, thereby discharging the gas in the exhaust chamber 301 through the exhaust port 304. In this case, since the exhaust port 304 is exposed outside the upper cover 40, the guiding effect of the exhaust pipe 305 on the gas in the exhaust chamber 301 is enhanced, and the exhaust efficiency is improved.

[0062] like Figure 10As shown, the cell support 20 includes a support body 21 and a compression member 22. The support body 21 includes an isolation plate 211 disposed opposite to the cell 10 along the second direction y. The compression member 22 is connected to the isolation plate 211 and abuts against the cell 10 to form a cooling channel 201 with the isolation plate 211 and the cell 10. Figure 13 As shown, the air-cooled channel 201 has an air outlet 2011. When cold air is introduced into the air-cooled channel 201, the switch 32 is opened to open the first air inlet 303. The cold air in the air-cooled channel 201 enters the exhaust chamber 301 through the air outlet 2011 and the first air inlet 303 in sequence.

[0063] Specifically, the support body 21 includes two sides facing away from each other along the second direction y. Each side is provided with a compression member 22, and multiple compression members 22 are provided on each side, spaced apart from the isolation plate 211. The compression members 22 are coated with adhesive on both sides, one side is bonded to the isolation plate 211, and the other side is bonded to the battery cell 10. The isolation plate 211 can separate adjacent battery cells 10, preventing short circuits caused by expansion of adjacent battery cells 10. In the embodiments of this application, as... Figure 11 As shown, three compression members 22 are provided on one side of the bracket body 21, including one lower compression member 22 and two upper compression members 22. The upper compression members 22 are located on the upper part of the isolation plate 211 and are straight strips with a small area. The two upper compression members 22 are symmetrically arranged along the third direction z and are spaced apart, forming the air outlet 2011 of the air-cooling channel 201. The lower compression member 22 is located on the lower part of the isolation plate 211, and its two sides are connected to the two bracket side plates 212 of the bracket body 21 respectively. The middle part extends upward along the first direction x and forms a sharp corner between the two upper compression members 22. The compression members 22 can be flexible and compressible structures, such as silicone or rubber. The compressor 22 can not only form a cooling channel 201 with the battery cell 10 and the isolation plate 211, but also absorb the expansion of the battery cell 10 by deformation due to its flexible deformation capability, preventing damage to the battery cell 10 due to excessive pressure. It can also avoid short circuits or damage caused by squeezing between adjacent battery cells 10. In addition, this deformable battery cell bracket 20 design can also meet the air volume requirements of the vehicle in the EOL (End of Life) state.

[0064] Furthermore, the support body 21 also includes two support side plates 212, which are disposed on opposite sides of the isolation plate 211 along the third direction z, such as... Figure 12 As shown, a second air inlet 2121 is provided on the side plate 212 of the bracket. The second air inlet 2121 is connected to the air-cooling channel 201 to introduce cold air into the air-cooling channel 201.

[0065] In this embodiment, a bracket side plate 212 is provided with a second air inlet 2121. The second air inlet 2121 is a strip-shaped air inlet with a relatively long length. An isolation plate 211 is connected to the bracket side plate 212 and divides the second air inlet 2121 into two, which can respectively introduce cold air into the air-cooling channels 201 on both sides of the isolation plate 211. When the area of ​​the bracket side plate 212 is small, the utilization rate of the bracket side plate 212 can be improved, the structure of the bracket side plate 212 can be simplified, and the increase in the number of openings can be avoided from affecting its structural strength. In addition, both side plates 60 are provided with second air inlets 2121 to form a double-sided top-out air-cooling channel 201 structure, which allows the air-cooling channel 201 to enter from both sides, with a shorter air intake path, improving air intake efficiency, and better heat dissipation effect of the battery cell 10.

[0066] Optionally, the compressor 22 includes two guide sections 221. One guide section 221, together with a bracket side plate 212, an isolation plate 211 and a battery cell 10, forms a cooling channel 201. The guide section 221 can provide guidance for the cold air in the cooling channel 201, so as to guide the cold air to flow smoothly to the air outlet 2011.

[0067] Specifically, the lower isolation component is provided with two air guides 221. The two air guides 221 are symmetrically arranged along the third direction z. The air guides 221 have a guide side facing the side plate 60. The guide side has an arc-shaped structure to provide a guiding function. The cold air can flow along the guide side to the air outlet 2011, thereby better controlling the direction and speed of air flow, improving the stability and flow speed of airflow, and ensuring the cooling effect.

[0068] Furthermore, in this embodiment of the application, a perforated structure is designed between the two flow guides 221 to form a weight reduction section 222. The setting of the weight reduction section 222 can reduce the overall weight of the cell support 20 and even the battery module 100 while satisfying the strength of the cell support 20, which helps to achieve the lightweight design of the battery module 100.

[0069] In summary, the battery module provided in this application embodiment may include at least the following advantages:

[0070] In this embodiment, the exhaust housing has an exhaust chamber with an air inlet and a first air inlet. The exhaust chamber is connected to the valve port of the explosion-proof valve through the air inlet. The first air inlet can be selectively closed. When the first air inlet is open, the exhaust chamber is connected to the air-cooling channel through the first air inlet. When the explosion-proof valve releases high-temperature gas, the high-temperature gas can flow into the exhaust chamber through the air inlet. At this time, when cold air is introduced into the air-cooling channel, the first air inlet can be opened, and the cold air in the air-cooling channel can flow into the exhaust chamber through the first air inlet. This not only prevents high-temperature gas from flowing back into the air-cooling channel through the first air inlet and damaging the battery cell, but the intervention of cold air can also accelerate the exhaust speed and improve the exhaust efficiency, thereby enhancing the initiative of the exhaust valve and ensuring the safety of the battery module. When no cold air is introduced into the air-cooling channel, the first air inlet remains closed. At this time, the air-cooling channel and the exhaust chamber cannot be connected, and high-temperature gas cannot flow back into the air-cooling channel through the first air inlet and damage the battery cell. According to the above battery module, the high-temperature gas released by the explosion-proof valve can be concentratedly discharged into the exhaust chamber through the air inlet and discharged through the exhaust outlet. The high-temperature gas will not flow back into the air-cooling channel and damage the battery cell, thus improving the concentration of the high-temperature gas emission path. At the same time, the exhaust speed can be increased by introducing cold air into the air-cooling channel, thereby improving the initiative of the exhaust process. In this way, the safety of the battery module is effectively guaranteed.

[0071] This application embodiment also provides a battery pack, including a housing, a cover plate, and the battery module 100 as described above. The housing is provided with a receiving cavity with an opening. The battery module 100 is disposed in the receiving cavity. The cover plate is connected to the housing and seals the opening. The battery module 100 is spaced from the inner wall of the housing, and the space is used to form an air intake channel.

[0072] Specifically, the inner wall of the enclosure and the battery module 100 can be spaced apart to form an air intake channel. Cold air can enter the air intake channel from the enclosure. The air intake channel is interconnected with multiple through holes on the side plate 60 of the battery module 100, so that cold air can be simultaneously introduced into multiple air-cooling channels 201, improving exhaust efficiency. This closed enclosure can also improve the overall structural strength of the battery pack. When the internal battery module 100 experiences thermal runaway, it can also isolate the battery module 100 from the external environment, preventing the internal structure of the battery pack from being exposed and ensuring the safety of the passenger compartment. According to the battery module 100 provided in the embodiments of this application, the explosion-proof valve 11 of its cell 10 has a more concentrated gas path and faster exhaust speed when exhausting high-temperature gas during thermal runaway, which is conducive to ensuring the overall safety performance and reliability of the battery pack, and at the same time improves the effectiveness and initiative of the battery pack in managing thermal runaway.

[0073] This application embodiment also provides an electrical device, which includes the battery module 100 or battery pack as described above.

[0074] It should be noted that in the embodiments of this application, the structure of the battery module is the same as that of the battery module in any of the above embodiments, and its beneficial effects are similar, so they will not be described in detail here.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0076] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module (100) having a first direction (x), a second direction (y) and a third direction (z) that intersect two by two, characterized in that, The battery module (100) comprises an upper cover (40), a battery cell (10), a battery cell support (20) and an exhaust shell (30); The battery cell (10) is provided with an explosion-proof valve (11) on the side close to the upper cover (40) along the first direction (x), the number of the battery cell support (20) and the battery cell (10) is multiple, and they are alternately arranged along the second direction (y), multiple battery cell supports (20) and multiple battery cells (10) enclose multiple air cooling channels (201) for entering cold air; the exhaust shell (30) is arranged on the side of the battery cell (10) and the battery cell support (20) close to the upper cover (40) along the first direction (x); The exhaust shell (30) has an exhaust cavity (301), the exhaust shell (30) is respectively provided with multiple air inlets (302), multiple first air inlets (303) and an exhaust port (304) for guiding the gas inside the exhaust cavity (301) out, the explosion-proof valve (11) is provided with a valve port, the air inlet (302) corresponds to the valve port one by one, the exhaust cavity (301) and the valve port are communicated through the air inlet (302), the air cooling channel (201) corresponds to and communicates with the first air inlet (303) one by one, and the exhaust shell (30) is further provided with a switching piece (32), the switching piece (32) is movably connected to the exhaust shell (30) to close or open the first air inlet (303).

2. The battery module (100) according to claim 1, characterized in that The switching piece (32) comprises two switching pieces (321), the two switching pieces (321) are respectively arranged on the opposite sides of the first air inlet (303) along the second direction (y) or the third direction (z) and are rotatably connected to the exhaust shell (30); the two switching pieces (321) are rotated towards each other to close the first air inlet (303), and the two switching pieces (321) are rotated away from each other to open the first air inlet (303).

3. The battery module (100) according to claim 1, characterized in that The exhaust shell (30) comprises a shell body (31) and a sealing piece (33), the shell body (31) is arranged on the side of the battery cell (10) and the battery cell support (20) close to the upper cover (40) along the first direction (x) and is connected with the battery cell support (20), the sealing piece (33) is connected to the side of the shell body (31) close to the battery cell (10) and encloses the exhaust cavity (301) with the shell body (31), and the switching piece (32) is movably connected to the shell body (31).

4. The battery module (100) according to claim 3, characterized in that The air inlet (302) and the first air inlet (303) are arranged on the sealing piece (33), and the exhaust port (304) is arranged on the shell body (31).

5. The battery module (100) according to claim 3, characterized in that The shell body (31) comprises a first body (311) connected to the cell support (20) and a second body (312) connected to one side of the first body (311) away from the cell support (20) along the first direction (x), and the switch member (32) is movably connected to the first body (311), and the exhaust port (304) is arranged on the second body (312).

6. The battery module (100) according to claim 1, characterized in that The exhaust shell (30) is provided with an exhaust duct (305) arranged on a side of the exhaust shell (30) away from the cell (10), and the exhaust port (304) is arranged on one end of the exhaust duct (305) away from the exhaust shell (30), and the exhaust duct (305) penetrates through the upper cover (40) and is exposed to the upper cover (40).

7. The battery module (100) according to claim 1, characterized in that The cell support (20) comprises a support body (21) comprising a partition plate (211) arranged opposite to the cell (10) along the second direction (y), and a compression member (22) connected to the partition plate (211) and abutting against the cell (10) to form the air cooling channel (201) together with the partition plate (211) and the cell (10), wherein the air cooling channel (201) has an air outlet (2011), and when the air cooling channel (201) is supplied with cooling air, the switch member (32) is opened to open the first air inlet (303), and the cooling air in the air cooling channel (201) enters the exhaust cavity (301) through the air outlet (2011) and the first air inlet (303) in sequence.

8. The battery module (100) according to claim 7, characterized in that The support body (21) further comprises two support side plates (212) arranged on opposite sides of the partition plate (211) along the third direction (z), and the support side plates (212) are provided with second air inlets (2121) in communication with the air cooling channel (201) to supply cooling air into the air cooling channel (201).

9. The battery module (100) according to claim 8, characterized in that The compression member (22) comprises two flow guide portions (221), and each flow guide portion (221) forms one air cooling channel (201) together with one support side plate (212), the partition plate (211) and the cell (10).

10. The battery module (100) according to claim 9, characterized in that The compression member (22) further comprises a weight-reducing portion (222) arranged between the two flow guide portions (221).

11. The battery module (100) according to claim 1, characterized in that The exhaust shell (30) is provided with a first fixing portion (313), the cell support (20) is provided with a second fixing portion (23), the first fixing portion (313) is connected to the second fixing portion (23) to connect the exhaust shell (30) to the cell support (20).

12. A battery pack, characterized by, The battery module (100) as claimed in any one of claims 1 to 11, wherein the battery module (100) is arranged in a receiving cavity of a box, the receiving cavity having an opening, and a cover plate is connected to the box and seals the opening, and the battery module (100) is spaced apart from an inner wall of the box to form an air inlet channel.

13. An electrical device, characterized by The battery module (100) as claimed in any one of claims 1 to 11, or the battery pack as claimed in claim 12.

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