Battery pack and electric device

Abstract

The application provides a battery pack and an electric device. The battery pack comprises a box body, a battery module, a first cooling plate, a support and a bottom plate. The box body comprises an immersion cavity, the battery module is arranged in the immersion cavity, the battery module comprises a battery, the first cooling plate is located on a side of a pressure relief valve away from the battery, the support is connected with the first cooling plate and located on a side of the first cooling plate away from the battery module, and the bottom plate is connected with the box body. The first cooling plate comprises a pressure relief opening opposite to a bottom position of the battery, the support comprises a pressure relief part opposite to the pressure relief opening, and the bottom plate and the support have a first pressure relief cavity. The thermal runaway material sprayed from the bottom of the battery can flow out of the pressure relief opening and break through the pressure relief part to flow into the first pressure relief cavity. The battery pack and the electric device provided by the application can avoid the damage of thermal runaway to the battery system caused by pressure relief lag or false triggering of the explosion-proof valve, and reduce the fire risk of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to battery packs and electrical equipment. Background Technology

[0002] As heat increases within the battery pack, there is a risk of thermal runaway. In the event of thermal runaway, the industry commonly adds an explosion-proof valve to the battery pack to expel the high-temperature, high-pressure gases generated during the runaway. However, this design has the following problems: if the explosion-proof valve's opening pressure is improperly set (e.g., too high or too low), it may lead to delayed pressure relief or false triggering of the valve, exacerbating the damage to the battery system caused by thermal runaway and increasing the risk of battery pack fire. Utility Model Content

[0003] The embodiments of this application provide a battery pack and electrical equipment that can optimize the pressure relief path and, to a certain extent, solve the problem of thermal runaway damage to the battery system caused by improper setting of the explosion-proof valve opening pressure, resulting in delayed pressure relief or accidental triggering of the explosion-proof valve, thereby reducing the risk of battery pack fire.

[0004] In a first aspect, embodiments of this application provide a battery pack, the battery pack comprising:

[0005] The enclosure includes the immersion chamber;

[0006] A battery module is disposed within the immersion chamber; the battery module includes a battery.

[0007] The first cooling plate is connected to the casing and located on the bottom side of the battery;

[0008] The bracket is located on the side of the first cooling plate furthest from the battery module; and

[0009] The base plate connects to the housing;

[0010] The first cooling plate includes a pressure relief port opposite to the bottom of the battery, the bracket includes a pressure relief part opposite to the pressure relief port, and a first pressure relief cavity is provided between the bottom plate and the bracket; thermal runaway material ejected from the bottom of the battery can flow out from the pressure relief port and break through the pressure relief part to flow into the first pressure relief cavity.

[0011] In some embodiments of this application, the bracket further includes a first support portion, which is connected to a pressure relief portion, and the first support portion is located between any two pressure relief portions;

[0012] The thickness of the first support portion in the extending direction of the battery is greater than the thickness of the pressure relief portion.

[0013] In some embodiments of this application, the first cooling plate further includes a cooling section located between any two adjacent pressure relief ports; wherein the cooling section is connected to the first support section.

[0014] In some embodiments of this application, the cooling section and the first support section are sealed together, and a first cooling channel is provided between the cooling section and the first support section, and the first cooling channel is in communication with the immersion chamber.

[0015] In some embodiments of this application, the first cooling plate further includes a communicating portion located on the side of the cooling portion away from the first support portion and within the immersion cavity; and

[0016] The connecting part includes a connecting channel, one end of which is connected to the immersion chamber and the other end of which is connected to the first cooling channel.

[0017] In some embodiments of this application, the first support portion includes a first sub-support portion and a second sub-support portion. The second sub-support portion protrudes from the periphery of the first sub-support portion in a direction away from the bottom plate and forms a first groove with the first sub-support portion. The pressure relief portion is connected to the second sub-support portion.

[0018] The cooling section further includes a first connecting section, a second connecting section, and a third connecting section; the second connecting section is located on the side of the second sub-support section away from the bottom plate and is connected to the second sub-support section; the first connecting section is connected to the second connecting section, and is located on the side of the first sub-support section away from the bottom plate, and is connected to the side wall of the first groove; the third connecting section is located on the side of the first connecting section away from the second connecting section, and is connected to the first connecting section and is spaced apart from the first sub-support section; the third connecting section and the first connecting section form a first cooling flow channel.

[0019] In some embodiments of this application, a second groove is provided between the second sub-support and the pressure relief part connected thereto, and the second groove communicates with the first pressure relief cavity.

[0020] In some embodiments of this application, the base plate includes: a bottom protective plate connected to the housing; and a first insulating member disposed on the side surface of the bottom protective plate near the bracket, wherein the first insulating member and the bracket have a first pressure relief cavity.

[0021] In some embodiments of this application, the base plate includes a main body and a second support, the second support being fixedly connected between the first support and the main body of the bracket to form a first pressure relief cavity between the bracket and the base plate.

[0022] In some embodiments of this application, the battery pack further includes a second insulating member connected between the bottom of the battery and the first cooling plate;

[0023] The second insulating component is positioned opposite the pressure relief port, allowing thermal runaway material ejected from the bottom of the battery to break through the second insulating component and flow into the pressure relief port.

[0024] In some embodiments of this application, the battery module further includes potting compound, which is located between adjacent batteries and connects the batteries and the first cooling plate.

[0025] In some embodiments of this application, the first cooling plate further includes a connecting portion, which is located on the side of the cooling portion away from the support and within the immersion cavity; the connecting portion includes a connecting channel, one end of which is connected to the immersion cavity and the other end of which is connected to the first cooling channel;

[0026] The potting compound also connects the battery and the connecting part, and the height of the connecting part in the extension direction of the battery is equal to or greater than the height of the potting compound in the extension direction of the battery.

[0027] In some embodiments of this application, the housing includes:

[0028] The first sub-box includes an immersion chamber; and

[0029] The second sub-box includes a receiving cavity; the first sub-box is disposed within the second sub-box.

[0030] The battery pack also includes an explosion-proof valve, which is located on the outer surface of the second sub-box and communicates with the first pressure relief chamber.

[0031] In some embodiments of this application, the second sub-box includes a second pressure relief chamber, one end of which is connected to an explosion-proof valve, and the other end is connected to the first pressure relief chamber.

[0032] In some embodiments of this application, the base plate is fixedly connected to the second sub-box, and the first cooling plate is connected to the first sub-box.

[0033] In some embodiments of this application, the battery pack further includes a second cooling plate, a first pipeline, and a cooling medium inlet. The second cooling plate is located at the end of the battery away from the base plate and has a second cooling channel that communicates with the immersion chamber. The cooling medium inlet is disposed on the outer surface of the second sub-casing, and the first pipeline is located within the receiving cavity and communicates with both the cooling medium inlet and the second cooling channel. The first pipeline serves as an input channel for the cooling medium.

[0034] In some embodiments of this application, the battery pack further includes a second conduit and a cooling medium outlet. The second conduit is located within the receiving cavity and communicates with both the cooling medium outlet and the first cooling channel. The second conduit serves as an output channel for the cooling medium.

[0035] Secondly, this application also provides an electrical device, which includes the battery pack described above.

[0036] This application provides a battery pack and an electrical device. The battery pack includes a housing, a battery module, a first cooling plate, a bracket, and a base plate. The housing includes an immersion chamber, in which the battery module is disposed. The battery module includes a battery. The first cooling plate is connected to the housing and located on the side away from the battery from the pressure relief valve. The bracket is located on the side of the first cooling plate away from the battery module. The base plate is connected to the housing. The first cooling plate includes a pressure relief port opposite to the bottom of the battery. The bracket includes a pressure relief section opposite to the pressure relief port. A first pressure relief chamber is formed between the base plate and the bracket. Thermal runaway material ejected from the bottom of the battery can flow out from the pressure relief port and break through the pressure relief section to flow into the first pressure relief chamber. This application forms a pressure relief port, a pressure relief section, and a first pressure relief chamber through the cooperation of the first cooling plate, the bracket, and the base plate. Since the battery in this application is not directly discharged through the explosion-proof valve, but instead the thermal runaway material generated during battery thermal runaway is discharged from the battery through the pressure relief port, pressure relief section and first pressure relief chamber, the pressure relief path of the thermal runaway material generated during battery thermal runaway is optimized. Thus, even if the opening pressure of the explosion-proof valve is improperly set (such as too high or too low), the thermal runaway material can be discharged from the battery through the pressure relief port, pressure relief section and first pressure relief chamber first. This can avoid the damage to the battery system caused by thermal runaway due to pressure relief lag or accidental triggering of the explosion-proof valve, and reduce the risk of battery pack fire. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a perspective view of a battery pack provided in some embodiments of this application.

[0039] Figure 2 for Figure 1 A three-dimensional schematic diagram of the battery pack from another angle.

[0040] Figure 3 for Figure 1 The battery pack shown is a top view.

[0041] Figure 4 For along Figure 3 The sectional view shown is shown in AA.

[0042] Figure 5 for Figure 4 An enlarged view of position C shown.

[0043] Figure 6 For along Figure 3 The 3D sectional view shown in BB is shown.

[0044] Figure 7 for Figure 1 The side view of the battery pack shown.

[0045] Figure 8 For along Figure 7 The cross-sectional view of DD shown.

[0046] Figure 9 A schematic diagram of the electrical equipment provided in this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1000 Electrical equipment; 100 Battery pack; 10 Housing; 20 Battery module; 30 First cooling plate; 40 Bracket; 50 Base plate; 60 Explosion-proof valve;

[0049] 11. First sub-box; 111. Immersion chamber; 12. Second sub-box; 121. Receiving chamber; 13. First pressure relief chamber; 14. Second pressure relief chamber;

[0050] 21. Battery; 22. Encapsulating compound;

[0051] 31. Pressure relief port; 32. Cooling section; 33. First cooling channel; 34. Connecting section; 341. Connecting channel; 321. First connecting section; 322. Second connecting section; 323. Third connecting section;

[0052] 41. Pressure relief section; 42. First support section; 421. First sub-support section; 422. Second sub-support section; 423. First groove; 424. Second groove;

[0053] 51. Bottom protective plate; 511. Main body; 512. Second support part; 52. First insulating component;

[0054] 63. Second insulating component; 631. Pressure relief zone;

[0055] 71. Second cooling plate; 72. First pipeline; 73. Cooling medium inlet; 74. Second cooling flow channel; 75. Second pipeline; 76. Cooling medium outlet;

[0056] 81. Output terminal; 82. Fast charging terminal; 83. Low voltage terminal. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0058] In related technologies, when a battery experiences thermal runaway, the industry often adds an explosion-proof valve inside the battery pack to expel the high-temperature, high-pressure gas generated during thermal runaway. This design has the following problems: if the opening pressure of the explosion-proof valve is not set properly (such as too high or too low), it may lead to delayed pressure relief or false triggering of the explosion-proof valve, exacerbating the damage of thermal runaway to the battery system.

[0059] To improve the above problems, firstly, please refer to [link / reference needed]. Figures 1 to 8 This application provides a battery pack 100, which includes a housing 10, a battery module 20, a first cooling plate 30, a bracket 40, and a base plate 50. The housing 10 includes an immersion chamber 111, in which the battery module 20 is disposed. The battery module 20 includes a battery 21. The first cooling plate 30 is located on one side of the bottom of the battery 21. The bracket 40 is connected to the first cooling plate 30 and is located on the side of the first cooling plate 30 away from the battery module 20. The base plate 50 is connected to the housing 10. The first cooling plate 30 includes a pressure relief port 31 opposite to the bottom of the battery 21. The bracket 40 includes a pressure relief part 41 opposite to the pressure relief port 31. A first pressure relief chamber 13 is formed between the base plate 50 and the bracket 40. Thermal runaway material ejected from the bottom of the battery 21 can flow out from the pressure relief port 31 and break through the pressure relief part 41 to flow into the first pressure relief chamber 13.

[0060] In this embodiment, the battery module 20 also includes a pressure relief valve (not shown) located at the bottom of the battery 21. When the pressure relief valve is opened, thermal runaway material can be ejected from the pressure relief valve.

[0061] In this embodiment, the first cooling plate 30 is connected to the housing 10.

[0062] This application uses a first cooling plate 30, a bracket 40, and a base plate 50 to form a pressure relief port 31, a pressure relief section 41, and a first pressure relief chamber 13. Because the thermal runaway material generated during the thermal runaway of the battery 21 is not directly discharged through the explosion-proof valve, but rather discharged from inside the battery 21 through the pressure relief port 31, the pressure relief section 41, and the first pressure relief chamber 13, the pressure relief path of the thermal runaway material is optimized. Thus, even if the opening pressure of the explosion-proof valve 60 is improperly set (e.g., too high or too low), the thermal runaway material can still be quickly discharged from inside the battery 21 through the pressure relief port 31, the pressure relief section 41, and the first pressure relief chamber 13. This achieves rapid pressure relief, avoiding damage to the battery structure caused by delayed pressure relief or accidental triggering of the explosion-proof valve 60, thereby reducing the fire risk of the battery pack 100. The thermal runaway protection effect is good, the service life is long, and it is safe and reliable. In addition, when thermal runaway occurs in battery 21, this application adopts a "drainage without blockage" strategy to avoid the high pressure and high temperature inside battery 21 from damaging the battery structure.

[0063] In this embodiment, the thermal runaway substance is a high-temperature, high-pressure thermal runaway substance or gas.

[0064] In some embodiments of this application, the bracket 40 and the first cooling plate 30 are made of plastic. In other embodiments, the materials of the bracket 40 and the first cooling plate 30 are not limited to plastic and can be selected according to the actual situation.

[0065] In some embodiments of this application, the bracket 40 further includes a first support portion 42, which is connected to the pressure relief portion 41. The first support portion 42 is located between any two pressure relief portions 41, and at least a portion of the first support portion 42 is opposite to the gap between two adjacent batteries 21. The thickness of the first support portion 42 in the extending direction of the battery 21 is greater than the thickness of the pressure relief portion 41 in the extending direction of the battery 21. The extending direction of the battery 21 can be understood as the axial direction of the battery or the length direction of the battery 21.

[0066] This application achieves partial thinning of the aforementioned support 40 (i.e., pressure relief section 41), allowing thermal runaway material to penetrate the pressure relief section 41. The first support section 42 prevents thermal runaway material ejected from the thermal runaway battery from affecting the bottom of other batteries 21 when it is ejected from the pressure relief section 41. In other words, the first support section 42 can protect adjacent batteries from being affected by thermal runaway material.

[0067] In some embodiments of this application, the first cooling plate 30 further includes a cooling section 32, which is located between any two adjacent pressure relief ports 31, and is connected to the first support section 42. By connecting the cooling section 32 and the first support section 42, this application can increase the reliability of the connection between the first cooling plate 30 and the support 40, and can prevent the support 40 from separating from the first cooling plate 30 due to the large impact force generated when thermal runaway material is ejected.

[0068] In some embodiments of this application, the cooling section 32 and the first support section 42 are sealed together, and a first cooling channel 33 is provided between the cooling section 32 and the first support section 42, which communicates with the immersion chamber 111. By sealing the cooling section 32 and the first support section 42 together, this application can completely isolate the cooling medium and the thermal runaway substance in the first cooling channel 33, thereby avoiding mutual interference between the cooling medium and the thermal runaway substance.

[0069] In some embodiments of this application, the first cooling plate 30 further includes a connecting portion 34, which is located on the side of the cooling portion 32 away from the first support portion 42 and within the immersion cavity 111. The connecting portion 34 includes a connecting channel 341, one end of which connects to the immersion cavity 111 and the other end of which connects to the first cooling channel 33. In this way, the cooling medium located in the immersion cavity 111 can smoothly flow from the immersion cavity 111 into the first cooling channel 33 and out of the first cooling channel 33, facilitating the circulation of the cooling medium.

[0070] In some embodiments of this application, the first support portion 42 includes a first sub-support portion 421 and a second sub-support portion 422. The second sub-support portion 422 protrudes around the first sub-support portion 421 along the direction away from the bottom plate 50 and forms a first groove 423 with the first sub-support portion 421. The pressure relief portion 41 is connected to the second sub-support portion 422. The cooling portion 32 further includes a first connecting portion 321, a second connecting portion 322, and a third connecting portion 323. The second connecting portion 322 is disposed on the side of the second sub-support portion 422 away from the bottom plate 50 and is connected to the second sub-support portion 422. The first connecting part 321 is connected to the second connecting part 322. The first connecting part 322 is located on the side of the first sub-support part 421 away from the bottom plate 50. The first connecting part 322 is connected to the first sub-support part 421 and is also connected to the side wall of the first groove 423. The third connecting part 323 is located on the side of the first connecting part 321 away from the second connecting part 322. The third connecting part 323 is connected to the first connecting part 321 and is spaced apart from the first sub-support part 421. The third connecting part 323 and the first connecting part 321 form the first cooling channel 33. With this connection method, this application can not only achieve a sealed connection between the cooling part 32 and the first support part 42, but also enhance the reliability of the connection between the cooling part 32 and the first support part 42.

[0071] In some embodiments of this application, a second groove 424 is provided between the second sub-support 422 and the pressure relief part 41 connected thereto, and the second groove 424 communicates with the first pressure relief chamber 13. By forming the second groove 424, the support 40 is thinned at the position corresponding to the pressure relief port 31, which facilitates the smooth passage of thermal runaway material through the pressure relief part 41.

[0072] In some embodiments of this application, the base plate 50 includes a bottom guard plate 51, which is connected to the housing 10, and a first pressure relief chamber 13 is provided between the bottom guard plate 51 and the bracket 40.

[0073] In some embodiments of this application, the base plate 50 further includes a first insulating member 52, which is disposed on the surface of the base plate 51 near the support 40, and a first pressure relief cavity 13 is provided between the first insulating member 52 and the support 40. By providing the first insulating member 52 on the side of the base plate 51 near the support 40, this application can prevent short circuits between the battery, thermal runaway material, base plate, and housing.

[0074] The first insulating component 52 is made of a high-temperature resistant insulating material. In this embodiment, the first insulating component 52 is a mica plate. The mica plate has flame-retardant and heat-insulating properties, which can greatly reduce the risk of heat diffusion in the battery module 20 and improve the safety of the battery pack 100.

[0075] In some embodiments of this application, the base plate 50 includes a main body 511 and a second support 512. The second support 512 is fixedly connected between the first support 42 and the main body 511 of the bracket 40 to form a first pressure relief cavity 13 between the bracket 40 and the base plate 50.

[0076] In some embodiments of this application, the battery pack 100 further includes a second insulating member 63, which is connected between the bottom of the battery 21 and the first cooling plate 30. Thermal runaway material ejected from the pressure relief valve can break through the second insulating member 63 and flow into the pressure relief port 31. By providing a second insulating member 63 between the bottom of the battery and the first cooling plate 30, this application can reduce the possibility of damage to other areas caused by the ejection path of thermal runaway material, thus ensuring high safety.

[0077] In this embodiment, the second insulating member 63 includes a pressure relief area 631 and a connecting area (not shown in the figure). The pressure relief area 631 is positioned opposite to the pressure relief port 31. The connecting area is arranged around the pressure relief area 631. The thickness of the pressure relief area 631 in the extension direction of the battery 21 is less than the thickness of the connecting area in the extension direction of the battery 21.

[0078] In other embodiments, the thickness of the pressure relief region 631 and the connection region may be identical.

[0079] The second insulating component 63 is made of a high-temperature resistant insulating material. In this embodiment, the second insulating component 63 is a mica plate. The mica plate has flame-retardant and heat-insulating properties, which can greatly reduce the risk of heat diffusion in the power battery module 20 and improve the safety of the battery pack 100.

[0080] In some embodiments of this application, the battery module 20 further includes a potting compound 22, which is located between adjacent batteries and connects the battery 21 and the first cooling plate 30. The potting compound 22 can not only be used to fix the battery and the first cooling plate 30, but also to seal the gap between the bottom of the adjacent battery 21 and the first cooling plate 30, thereby further preventing thermal runaway substances from affecting other batteries.

[0081] In some embodiments of this application, the first cooling plate 30 further includes a connecting portion 34, which includes a connecting channel 341. One end of the connecting channel 341 is connected to the immersion chamber 111, and the other end is connected to the first cooling channel 33. The potting compound 22 also connects the battery and the connecting portion 34. In the extending direction of the battery 21, the height of the connecting portion 34 in the extending direction of the battery 21 is equal to or greater than the height of the potting compound 22 in the extending direction of the battery 21.

[0082] In some embodiments of this application, the housing 10 includes a first sub-housing 11 and a second sub-housing 12. The first sub-housing 11 includes an immersion chamber 111, and the second sub-housing 12 includes a receiving chamber 121. The first sub-housing 11 is disposed within the second sub-housing 12. The battery pack 100 also includes an explosion-proof valve 60, which is disposed on the outer surface of the second sub-housing 12 and communicates with the first pressure relief chamber 13.

[0083] In this embodiment, the explosion-proof valve 60 is disposed on the crossbeam of the housing 10.

[0084] In this embodiment, the explosion-proof valve 60 is also protected by a protective cover (not shown) with an opening.

[0085] This application optimizes the installation of the explosion-proof valve 60 by placing the explosion-proof valve 60 on the outer surface (beam) of the second sub-box 12 and communicating it with the first pressure relief chamber 13. It eliminates the need for a customized immersion type explosion-proof valve 60 and prevents the cooling medium from entering the explosion-proof valve 60.

[0086] Furthermore, in this application, the battery 21 and the cooling medium are located within the immersion chamber 111 of the battery pack 100, while the pressure relief chambers (first pressure relief chamber 13 and second pressure relief chamber 14) and the explosion-proof valve 60 are located outside the battery pack 100. The battery 21 and the cooling medium are located in different chambers from the pressure relief chambers and the explosion-proof valve 60, thus avoiding mutual interference. Since the explosion-proof valve 60 is not in the cooling medium (immersion liquid), there is no risk of cooling medium (immersion liquid) leakage, and conventional explosion-proof valves can be used, resulting in low cost.

[0087] In some embodiments of this application, the second sub-box 12 includes a second pressure relief chamber 14, one end of which is connected to an explosion-proof valve, and the other end is connected to a first pressure relief chamber 13. The presence of the second pressure relief chamber 14 increases the pressure relief path for thermal runaway substances, thus increasing the space for accommodating them. Furthermore, it allows for timely discharge of thermal runaway substances from the battery into the first and second pressure relief chambers 13 and 14 when the explosion-proof valve's opening pressure is improperly set (e.g., too high or too low). This further prevents damage to the battery system caused by delayed pressure relief or accidental triggering of the explosion-proof valve due to thermal runaway.

[0088] In some embodiments of this application, the base plate 50 is fixedly connected to the second sub-box 12, and the first cooling plate 30 is connected to the first sub-box 11.

[0089] In some embodiments of this application, the battery pack 100 further includes a second cooling plate 71, a first pipe 72, and a cooling medium inlet 73. The second cooling plate 71 is located at the end of the battery 21 away from the bottom plate 50. The second cooling plate 71 has a second cooling channel 74, which is connected to the immersion chamber 111. The cooling medium inlet 73 is disposed on the outer surface of the second sub-box 12. The first pipe 72 is located in the receiving cavity 121 and is connected to the cooling medium inlet 73 and the second cooling channel 74 respectively. The first pipe 72 can transport the cooling medium from the cooling medium inlet 73 to the second cooling channel 74.

[0090] In some embodiments of this application, the battery pack 100 further includes a second pipe 75 and a cooling medium outlet 76. The second pipe 75 is located in the receiving cavity 121 and is connected to the cooling medium outlet 76 and the first cooling channel 33 respectively. The second pipe 75 can transport the cooling medium from the first cooling channel 33 to the cooling medium outlet 76.

[0091] In this embodiment, the first pipe 72 and the second pipe 75 are housed in the space between the second sub-box 12 and the first sub-box 11, and the cooling medium inlet 73 and the cooling medium outlet 76 are located on the same side of the second sub-box 12.

[0092] In this embodiment, the explosion-proof valve 60 is located on different sides of the cooling medium inlet 73 and the cooling medium outlet 76, which can prevent thermal runaway substances from affecting the cooling medium inlet 73 and the cooling medium outlet 76 when the explosion-proof valve 60 is opened.

[0093] In this embodiment, the battery pack 100 also includes an output terminal 81, a fast charging terminal 82, and a low-voltage terminal 83. The output terminal 81, fast charging terminal 82, and low-voltage terminal 83 are located on the same side of the second sub-box 12, and are also located on the same side of the second sub-box 12 as the cooling medium inlet 73 and the cooling medium outlet 76. That is, the output terminal 81, fast charging terminal 82, and low-voltage terminal 83 are located on different sides of the second sub-box 12 from the explosion-proof valve 60. In this way, when the explosion-proof valve 60 is opened, thermal runaway substances can be prevented from affecting the output terminal 81, fast charging terminal 82, and low-voltage terminal 83.

[0094] Please see Figure 9 Secondly, this application also provides an electrical device 1000, which includes the battery pack 100 as described above.

[0095] The specific structure of the battery pack 100 is as described in the above embodiments. Since the electrical equipment 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0096] It is understood that electrical equipment 1000 includes, but is not limited to, electric toys, power tools, electric vehicles, automobiles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Automobiles can include gasoline-powered cars, natural gas-powered cars, and new energy vehicles.

[0097] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery pack, characterized in that, include: The enclosure includes the immersion chamber; A battery module is disposed within the immersion chamber; the battery module includes a battery. The first cooling plate is connected to the housing and located on one side of the bottom of the battery; The bracket is located on the side of the first cooling plate away from the battery module; and The base plate is connected to the housing. The first cooling plate includes a pressure relief port opposite to the bottom of the battery, the bracket includes a pressure relief section opposite to the pressure relief port, and a first pressure relief cavity is formed between the bottom plate and the bracket; thermal runaway material ejected from the bottom of the battery can flow out from the pressure relief port and break through the pressure relief section to flow into the first pressure relief cavity.

2. The battery pack as described in claim 1, characterized in that, The bracket further includes a first support portion, which is connected to the pressure relief portion, and the first support portion is located between any two of the pressure relief portions; The thickness of the first support portion in the extending direction of the battery is greater than the thickness of the pressure relief portion.

3. The battery pack as described in claim 2, characterized in that, The first cooling plate further includes a cooling section, which is located between any two adjacent pressure relief ports; The cooling section and the first support section are connected.

4. The battery pack as described in claim 3, characterized in that, The cooling section and the first support section are sealed together, and a first cooling channel is provided between the cooling section and the first support section. The first cooling channel is in communication with the immersion chamber.

5. The battery pack as described in claim 4, characterized in that, The first cooling plate further includes a communicating portion, the communicating portion being located on the side of the cooling portion away from the first support portion and within the immersion cavity; and The connecting portion includes a connecting channel, one end of which is connected to the immersion chamber and the other end of which is connected to the first cooling channel.

6. The battery pack as described in claim 4, characterized in that, The first support portion includes a first sub-support portion and a second sub-support portion. The second sub-support portion protrudes around the first sub-support portion in a direction away from the bottom plate and forms a first groove with the first sub-support portion. The pressure relief portion is connected to the second sub-support portion. The cooling section further includes a first connecting section, a second connecting section, and a third connecting section; the second connecting section is disposed on the side of the second sub-support section away from the base plate and is connected to the second sub-support section; the first connecting section is connected to the second connecting section, and is disposed on the side of the first sub-support section away from the base plate, and is connected to the first sub-support section and the side wall of the first groove; the third connecting section is located on the side of the first connecting section away from the second connecting section, and is connected to the first connecting section and spaced apart from the first sub-support section; the third connecting section and the first connecting section form the first cooling channel.

7. The battery pack as described in claim 6, characterized in that, The second sub-support portion has a second groove between itself and the pressure relief portion connected thereto, and the second groove communicates with the first pressure relief cavity.

8. The battery pack according to any one of claims 1-7, characterized in that, The base plate includes: A bottom protective plate, which is connected to the housing; and a first insulating member, disposed on the side surface of the bottom protective plate near the support, wherein the first insulating member and the support have a first pressure relief cavity.

9. The battery pack according to any one of claims 2-7, characterized in that, The base plate includes a main body and a second support. The second support is fixedly connected between the first support and the main body of the bracket to form the first pressure relief cavity between the bracket and the base plate.

10. The battery pack according to any one of claims 1-7, characterized in that, The battery pack also includes a second insulating member, which is connected between the bottom of the battery and the first cooling plate; The second insulating element is positioned opposite the pressure relief port, and thermal runaway material ejected from the bottom of the battery can break through the second insulating element and flow into the pressure relief port.

11. The battery pack according to any one of claims 4-7, characterized in that, The battery module also includes potting compound, which is located between adjacent batteries and connects the batteries and the first cooling plate.

12. The battery pack as claimed in claim 11, characterized in that, The first cooling plate further includes a connecting portion, which is located on the side of the cooling portion away from the support and within the immersion cavity; the connecting portion includes a connecting channel, one end of which is connected to the immersion cavity and the other end of which is connected to the first cooling channel; The potting compound also connects the battery and the connecting portion, and the height of the connecting portion in the extending direction of the battery is equal to or greater than the height of the potting compound in the extending direction of the battery.

13. The battery pack according to any one of claims 4-7, characterized in that, The enclosure includes: The first sub-box includes the immersion cavity; and The second sub-box includes a receiving cavity; the first sub-box is disposed within the second sub-box. The battery pack also includes an explosion-proof valve, which is disposed on the outer surface of the second sub-box and communicates with the first pressure relief chamber.

14. The battery pack as claimed in claim 13, characterized in that, The second sub-box includes a second pressure relief chamber, one end of which is connected to the explosion-proof valve, and the other end of which is connected to the first pressure relief chamber.

15. The battery pack as claimed in claim 13, characterized in that, The base plate is fixedly connected to the second sub-box, and the first cooling plate is connected to the first sub-box.

16. The battery pack as claimed in claim 13, characterized in that, The battery pack further includes a second cooling plate, a first pipeline and a cooling medium inlet. The second cooling plate is located at the end of the battery away from the bottom plate. The second cooling plate has a second cooling channel, which is connected to the immersion chamber. The cooling medium inlet is located on the outer surface of the second sub-box, and the first pipeline is located inside the receiving cavity and is connected to the cooling medium inlet and the second cooling channel, respectively.

17. The battery pack as claimed in claim 13, characterized in that, The battery pack also includes a second pipeline and a cooling medium outlet. The second pipeline is located within the receiving cavity and is connected to the cooling medium outlet and the first cooling channel, respectively.

18. An electrical appliance, characterized in that, include: The battery pack as described in any one of claims 1-17.

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