Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a bottom box and a cover plate, the bottom box is provided with a containing cavity, and the cover plate is connected to the bottom box to seal the containing cavity. The single battery, the separator and the liquid cooling piece are arranged in the accommodating cavity. Each single battery comprises a shell and an anti-explosion valve arranged on the shell, and the anti-explosion valve is arranged on one side, deviating from the cover plate, of the shell; the separator is arranged on one side of the shell deviating from the cover plate, and the liquid cooling part is arranged on one side of the separator deviating from the single battery. The face, facing the shell, of the isolation piece is partially sunken towards the side close to the isolation piece to form an exhaust channel, and at least part of the anti-explosion valve is arranged opposite to the exhaust channel. A through communicating hole is formed in the wall face of the exhaust channel, the face, facing the shell, of the liquid cooling piece is partially sunken to form a containing groove, and the containing groove communicates with the communicating hole. The liquid cooling plate is provided with the containing groove for containing the solid-liquid mixture, blockage of the exhaust channel is reduced, and the liquid cooling plate cools emissions in time so as to reduce thermal runaway spreading.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to a battery pack and electrical equipment. Background Technology

[0002] As a key component of electrical equipment, the safety performance of battery packs has always been a design focus.

[0003] In related technologies, exhaust channels are typically set up inside the battery pack. When a single cell in the battery pack experiences thermal runaway, high-temperature gas enters the exhaust channel and is eventually discharged to the outside of the battery pack.

[0004] However, when a battery experiences thermal runaway, it releases not only gases but also a solid-liquid mixture. This mixture can block the exhaust channels, leading to poor ventilation and affecting the safety performance of the battery pack. Utility Model Content

[0005] This application provides a battery pack and an electrical device to improve the safety performance of the battery pack.

[0006] In a first aspect, this application provides a battery pack having intersecting first and second directions. The battery pack includes: a base box and a cover plate. The base box has a receiving cavity open at one end along the first direction, and the cover plate is connected to the base box and seals the open end. Multiple individual cells are disposed in the receiving cavity. Each individual cell includes a housing and an explosion-proof valve disposed on the housing. The explosion-proof valve is disposed on the side of the housing away from the cover plate. An isolator and a liquid cooling component are both disposed in the receiving cavity. The isolator is disposed on the side of the housing away from the cover plate, and the liquid cooling component is disposed on the side of the isolator away from the individual cells. The isolator has a portion of its side facing the housing recessed towards the side close to the isolator to form an exhaust channel. The exhaust channel extends along the second direction. In the first direction, at least a portion of the explosion-proof valve is disposed facing the exhaust channel. A through hole is formed on the wall of the exhaust channel, extending along the first direction. The liquid cooling component has a portion of its side facing the housing recessed to form a receiving groove, which communicates with the through hole.

[0007] To achieve the above technical solution, when a single battery cell experiences thermal runaway, high-temperature gas is ejected from the explosion-proof valve and discharged to the outside of the battery pack along the exhaust channel, thereby preventing further aggravation of thermal runaway. It is understood that the exhaust during a single battery cell's thermal runaway includes not only gas but also a solid-liquid mixture. This mixture may block the exhaust channel, leading to obstruction. Furthermore, the solid-liquid mixture carries significant heat, which can further spread and exacerbate the spread of thermal runaway as it flows through the exhaust channel. In this embodiment, a receiving groove is provided on the liquid cooling plate. When the solid-liquid mixture is discharged from the explosion-proof valve and passes through the exhaust channel, it can fall into the receiving groove through the connecting hole, thereby reducing the blockage of the exhaust channel by the solid-liquid mixture. Additionally, the liquid cooling plate can cool the solid-liquid mixture in a timely manner, reducing the risk of thermal runaway spreading.

[0008] As one of the optional embodiments of this application, multiple individual cells are arranged along a second direction, and multiple receiving grooves are formed on the liquid cooling component. The multiple receiving grooves are respectively arranged with explosion-proof valves. Multiple connecting holes are opened on the wall of the exhaust channel along a first direction. The multiple connecting holes are respectively arranged with multiple explosion-proof valves. In the first direction, at least a portion of the explosion-proof valve is arranged facing the corresponding receiving groove and connecting hole.

[0009] To achieve the above technical solution, since the receiving tank, the connecting hole, and the explosion-proof valve face each other, the solid-liquid mixture will be preferentially discharged into the receiving tank when it is sprayed from the explosion-proof valve, further reducing the flow of the solid-liquid mixture in the exhaust channel. Furthermore, since the receiving tank and the explosion-proof valve correspond one-to-one, there is a gap between adjacent receiving tanks, which further avoids the impact of the heat of the solid-liquid mixture on surrounding components and reduces the risk of heat spread.

[0010] As one optional embodiment of this application, it also includes an electrical connector disposed between the insulating member and the liquid cooling member;

[0011] The single cell also includes terminals disposed on the outer casing, with the terminals disposed on the side of the outer casing away from the cover plate;

[0012] The isolator has an electrical connection hole that extends along the first direction, and the pole passes through the electrical connection hole to be electrically connected to the electrical connector.

[0013] As one optional embodiment of this application, it further includes a thermally conductive layer disposed between the electrical connector and the liquid cooling component, wherein the electrical connector is fixedly connected to the liquid cooling component through the thermally conductive layer.

[0014] To achieve the above technical solution, during the operation of a single battery cell, the current inside the single battery cell continuously connects to the electrical device through the electrical connector. This causes the electrical connector to generate heat, especially in some high-intensity power consumption scenarios where the electrical connector generates a lot of heat. In this embodiment, the electrical connector contacts the liquid cooling component through a heat-conducting layer, which allows the heat generated by the electrical connector to be quickly exchanged with the liquid cooling component, thereby reducing the temperature of the electrical connector and ensuring the safety performance of the battery pack.

[0015] As one of the optional embodiments of this application, it also includes a third direction, wherein the first direction, the second direction and the third direction intersect each other; multiple isolation members are provided, and the multiple isolation members are spaced apart along the third direction, and each isolation member extends along the second direction.

[0016] To achieve the above technical solution, the isolation component is made into a split structure, which is beneficial for the installation, inspection and maintenance of the isolation component.

[0017] As one optional embodiment of this application, the isolation member includes: a support plate, stacked on the side of the liquid cooler near the outer shell; a plurality of side plates, respectively disposed on both sides of the support plate along a second direction, wherein in a first direction, one side of the side plate is connected to the support plate and the other side of the side plate extends toward the outer shell; a plurality of edge plates, respectively disposed on the side of the side plate away from the support plate, wherein along the first direction, there is a gap between the edge plates and the liquid cooler; wherein the side plates and the support plate enclose to form an exhaust channel, and a connecting hole is opened on the support plate.

[0018] To achieve the above technical solution, for the space between the outer shell and the liquid cooling plate in the first direction, this structural design of the separator only occupies the area corresponding to the support plate and the side plate. For the edge plate, there is a gap between the edge plate and the liquid cooling plate. This gap can be used for the installation and placement of the electrode post, the heat-conducting layer, and the electrical connector. This means that the electrode post, the heat-conducting layer, and the electrical connector do not need to occupy additional space in the battery pack. By designing this structure of the separator, multiple components can be integrated well without sacrificing the internal space of the battery pack, so as to achieve reasonable use of space and ensure the energy density of the battery pack.

[0019] As one of the optional embodiments of this application, an angle is formed between the side plate and the support plate, and the angle is an obtuse angle.

[0020] As one optional embodiment of this application, it further includes a first partition and a second partition, both disposed in the accommodating cavity. In a second direction, the first partition and the second partition are spaced apart to sequentially divide the accommodating cavity into a first chamber, a second chamber, and a third chamber. The single cell is disposed in the second chamber. The liquid cooling component includes a plate, an inlet connector, and an outlet connector. A portion of the plate is placed in the second chamber, and another portion of the plate penetrates the first partition and extends into the first chamber. The portion of the plate located in the first chamber is connected to the inlet connector and the outlet connector.

[0021] To achieve the above technical solution, the liquid inlet connector and the liquid outlet connector are located in the first chamber, and the first chamber and the second chamber are separated. This separates the liquid inlet connector and the liquid outlet connector from the individual cells, reducing the impact on the liquid inlet connector and the liquid outlet connector when the individual cells experience thermal runaway.

[0022] As one of the optional embodiments of this application, the first chamber, the second chamber and the third chamber are sealed together, an exhaust hole is provided on the second partition, the exhaust channel is connected to the third chamber through the exhaust hole, and an explosion relief valve is provided on the bottom box, which is connected to the third chamber.

[0023] To achieve the above technical solution, a specific structure for gas discharge is proposed. One end of the exhaust channel is sealed by the first partition, and the gas in the exhaust channel enters the third chamber through the exhaust hole along the second direction and is finally discharged through the explosion relief valve.

[0024] As one of the optional embodiments of this application, a buffer layer is also included, which is disposed on the side of the liquid cooler away from the individual battery cell and is in contact with the bottom box.

[0025] An electrical device comprising: a battery pack as described above.

[0026] One of the above technical solutions has the following advantages or beneficial effects: When a single cell experiences thermal runaway, high-temperature gas is ejected from the explosion-proof valve and discharged to the outside of the battery pack along the exhaust channel, thereby preventing further aggravation of thermal runaway. It is understood that the exhaust during a single cell's thermal runaway includes not only gas but also a solid-liquid mixture. This mixture may block the exhaust channel, leading to obstruction. Furthermore, the solid-liquid mixture carries a significant amount of heat, which can further aggravate the spread of thermal runaway as it flows through the exhaust channel. In this embodiment, a receiving groove is provided on the liquid cooling plate. When the solid-liquid mixture is discharged from the explosion-proof valve and passes through the exhaust channel, it can fall into the receiving groove through the connecting hole, thereby reducing the blockage of the exhaust channel by the solid-liquid mixture. Additionally, the liquid cooling plate can cool the solid-liquid mixture in a timely manner, reducing the risk of thermal runaway propagation. Attached Figure Description

[0027] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0028] Figure 1 This is an overall structural diagram of the battery pack provided in the embodiments of this application;

[0029] Figure 2 This is an exploded structural diagram of the battery pack provided in the embodiments of this application;

[0030] Figure 3 This is an exploded structural diagram of the internal structure of the accommodating cavity of the battery pack provided in the embodiments of this application;

[0031] Figure 4 This is an exploded structural view of the internal structure of the accommodating cavity of the battery pack provided in the embodiments of this application from another perspective;

[0032] Figure 5 This is an exploded structural diagram provided in the embodiments of this application, mainly used to illustrate the positional relationship between the isolation component, the liquid cooling component, and the electrical connection component;

[0033] Figure 6 This is a schematic diagram provided in the embodiments of this application, mainly used to illustrate the structure of the isolation component;

[0034] Figure 7 This is a cross-sectional view of the battery pack provided in an embodiment of this application;

[0035] Figure 8 This is provided by the embodiments of this application. Figure 7 A magnified view of part A in the middle;

[0036] Figure 9 This is a structural diagram illustrating the positional relationship between the liquid cooling plate and the first partition provided in an embodiment of this application;

[0037] Figure 10 This is a structural diagram provided in an embodiment of this application for illustrating the exhaust of the exhaust channel.

[0038] Attached reference numerals: 11, bottom box; 110, opening; 1100, explosion relief valve; 12, cover plate;

[0039] 2. Single battery cell; 21. Casing; 22. Explosion-proof valve; 23. Terminal post;

[0040] 3. Isolation component; 30. Exhaust passage; 301. Connecting hole; 300. Electrical connection hole; 31. Support plate; 32. Side plate; 33. Edge plate;

[0041] 4. Liquid-cooled component; 40. Receiving tank; 41. Plate; 42. Liquid inlet connector; 43. Liquid outlet connector;

[0042] 5. Electrical connectors; 6. Thermal conductive layer; 7. Spacing;

[0043] 81. First partition; 82. Second partition; 820. Vent hole;

[0044] 9. Receptacle cavity; 91. First chamber; 92. Second chamber; 93. Third chamber;

[0045] 10. Buffer layer; 100. Spacing space;

[0046] Z, first direction; X, second direction; Y, third direction. Detailed Implementation

[0047] 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0049] The following is in conjunction with the appendix Figure 1-10 This application will be further described below.

[0050] Reference Figures 1-4 This application provides a battery pack having intersecting first direction Z, second direction X, and third direction Y. Specifically, the battery pack is generally cuboid, and the first direction Z, second direction X, and third direction Y form a spatial rectangular coordinate system. In one example, the first direction Z, second direction X, and third direction Y correspond to the thickness direction, length direction, and width direction of the battery pack, respectively.

[0051] The battery pack includes a base box 11 and a cover plate 12. The base box 11 has a receiving cavity 9 with an opening 110 at one end along the first direction Z. The cover plate 12 is connected to the base box 11 and covers the opening 110. The base box 11 and the cover plate 12 form the external protective structure of the battery pack.

[0052] The battery pack also includes individual cells 2, separators 3, electrical connectors 5, thermal conductive layer 6, liquid cooling component 4, and buffer layer 10 disposed in the accommodating cavity 9.

[0053] Reference Figure 2 and Figure 3 Multiple individual battery cells 2 are provided, and each individual battery cell 2 includes a housing 21 and an explosion-proof valve 22 disposed on the housing 21. The explosion-proof valve 22 is disposed on the side of the housing 21 opposite to the cover plate 12. Specifically, multiple groups of individual battery cells 2 are provided, and each group includes several individual battery cells 2. The several individual battery cells 2 in each group are stacked along the second direction X. The multiple groups of individual battery cells 2 are arranged along the third direction Y.

[0054] Reference Figures 5-8 The isolator 3 is disposed on the side of the outer casing 21 away from the cover plate 12, and the liquid cooling component 4 is disposed on the side of the isolator 3 away from the single cell 2. The portion of the isolator 3 facing the outer casing 21 is recessed towards the side close to the isolator 3 to form an exhaust channel 30. The exhaust channel 30 extends along the second direction X. In the first direction Z, at least a portion of the explosion-proof valve 22 is disposed opposite to the exhaust channel 30. A connecting hole 301 extending along the first direction Z is provided on the wall of the exhaust channel 30. The portion of the liquid cooling component 4 facing the outer casing 21 is recessed to form a receiving groove 40, which communicates with the connecting hole 301.

[0055] In this embodiment, when a single cell 2 experiences thermal runaway, high-temperature gas is ejected from the explosion-proof valve 22 and discharged to the outside of the battery pack along the exhaust channel 30, thereby preventing further aggravation of thermal runaway. It is understood that the exhaust from a single cell 2 during thermal runaway includes not only gas but also a solid-liquid mixture. This mixture may block the exhaust channel 30, causing it to become obstructed. Furthermore, the mixture carries a significant amount of heat, which can further aggravate the spread of thermal runaway as it flows through the exhaust channel 30. This embodiment addresses this by providing a receiving groove 40 on the liquid cooling plate. When the solid-liquid mixture is discharged from the explosion-proof valve 22 through the exhaust channel 30, it can fall into the receiving groove 40 through the connecting hole 301, reducing the blockage of the exhaust channel 30. Additionally, the liquid cooling plate can cool the solid-liquid mixture promptly, reducing the risk of thermal runaway propagation.

[0056] More specifically regarding the above components.

[0057] Reference Figure 4 As one of the optional embodiments of this application, multiple single-cell batteries 2 in the same group are arranged along the second direction X. Multiple receiving slots 40 are formed on the liquid cooling component 4. The multiple receiving slots 40 are correspondingly arranged with explosion-proof valves 22. Multiple connecting holes 301 extending along the first direction Z are opened on the wall of the exhaust channel 30. The multiple connecting holes 301 are correspondingly arranged with multiple explosion-proof valves 22. In the first direction Z, at least a portion of the explosion-proof valve 22 is arranged facing the corresponding receiving slot 40 and connecting hole 301.

[0058] More specifically, the receiving tank 40 is racetrack-shaped, the liquid cooling component 4 is a plate-like structure, and the orthographic projection of the explosion-proof valve 22 on the liquid cooling component 4 is within the area defined by the orthographic projection of the connecting hole 301 on the liquid cooling component 4. The orthographic projection of the connecting hole 301 on the liquid cooling component 4 is also within the area defined by the orthographic projection of the receiving tank 40 on the liquid cooling component 4. This allows the solid and liquid discharges ejected from the explosion-proof valve 22 to enter the receiving tank 40 relatively comprehensively and smoothly.

[0059] To achieve the above technical solution, since the receiving tank 40, the connecting hole 301, and the explosion-proof valve 22 face each other, the solid-liquid mixture will preferentially be discharged into the receiving tank 40 when it is ejected from the explosion-proof valve 22, further reducing the flow of the solid-liquid mixture in the exhaust channel 30. Furthermore, since the receiving tanks 40 and the explosion-proof valves 22 correspond one-to-one, there is a gap between adjacent receiving tanks 40, thus further avoiding the impact of the heat of the solid-liquid mixture on surrounding components and reducing the risk of heat spread. It should be noted that, in an optional example, the receiving tank 40 can also be a continuous tank structure along the second direction X.

[0060] Reference Figure 5 , Figure 7 and Figure 8 As one optional embodiment of this application, the electrical connector 5 is disposed between the separator 3 and the liquid cooler 4; the single cell 2 also includes an electrode post 23 disposed on the outer casing 21, the electrode post 23 being disposed on the side of the outer casing 21 away from the cover plate 12; wherein, the separator 3 has an electrical connection hole 300 extending along the first direction Z, and the electrode post 23 passes through the electrical connection hole 300 and is electrically connected to the electrical connector 5. A thermally conductive layer 6 is also included, disposed between the electrical connector 5 and the liquid cooler 4, and the electrical connector 5 is fixedly connected to the liquid cooler 4 through the thermally conductive layer 6.

[0061] More specifically, each individual battery cell 2 has a positive terminal 23 and a negative terminal 23 on its terminals 23, both of which are located on the side of the outer casing 21 facing away from the cover plate 12. The electrical connector 5 is a metal connecting piece, and the electrical connector 5, the connecting hole 301, and the terminal 23 are correspondingly arranged one-to-one. In one example, the electrical connector 5 is a nickel or aluminum sheet, and multiple individual batteries 2 arranged along the second direction X are connected in series through the electrical connector 5. The thermally conductive layer 6 is designed as a thermally conductive structural adhesive. The thermally conductive structural adhesive is applied to the side of the separator 3 facing the cover plate 12, allowing the electrical connector 5 to contact and connect with the thermally conductive layer 6. In one example, the thermally conductive layer 6 is a continuous strip shape along the second direction X.

[0062] To achieve the above technical solution, during the operation of the single battery 2, the current within the single battery 2 continuously connects to the electrical equipment through the electrical connector 5. This causes the electrical connector 5 to generate heat, especially in some high-intensity power consumption scenarios where the heat generated by the electrical connector 5 is relatively large. In this embodiment, the electrical connector 5 contacts the liquid cooling component 4 through the heat-conducting layer 6, which allows the heat generated by the electrical connector 5 to quickly exchange heat with the liquid cooling component 4, thereby reducing the temperature of the electrical connector 5 and ensuring the safety performance of the battery pack. The buffer layer 10 is disposed on the side of the liquid cooling component 4 away from the single battery 2, and the buffer layer 10 contacts the bottom box 11. The buffer layer 10 is mainly used to support the single battery 2, liquid cooling component 4, and other structures to reduce hard contact, ensure stability and service life. In one example, the buffer layer 10 is foam.

[0063] Reference Figure 4 and Figure 5 As one optional embodiment of this application, multiple separators 3 are provided, spaced apart along a third direction Y, with each separator 3 extending along a second direction X. Each group of individual cells 2 mentioned above corresponds to each separator 3. The separator 3 is made into a split structure, which is beneficial for the installation, inspection, and maintenance of the separator 3.

[0064] Reference Figure 6 and Figure 8 As one of the optional embodiments of this application, the isolation member 3 includes: a support plate 31, stacked on the side of the liquid cooling member 4 near the outer shell 21; a plurality of side plates 32, respectively disposed on both sides of the support plate 31 along the second direction X, and in the first direction Z, one side of the side plate 32 is connected to the support plate 31, and the other side of the side plate 32 extends toward the outer shell 21; a plurality of edge plates 33, respectively disposed on the side of the side plate 32 away from the support plate 31, and along the first direction Z, a gap space 7 is left between the edge plates 33 and the liquid cooling member 4; wherein, the side plates 32 and the support plate 31 enclose to form an exhaust channel 30, and a connecting hole 301 is opened on the support plate 31.

[0065] To achieve the above technical solution, for the space between the outer shell 21 and the liquid cooling plate in the first direction Z, the structure of the separator 3 only occupies the area corresponding to the support plate 31 and the side plate 32. For the edge plate 33, there is a gap space 7 between the edge plate 33 and the liquid cooling plate. The gap space 7 can be used for the installation and placement of the pole post 23, the heat-conducting layer 6 and the electrical connector 5. This means that the pole post 23, the heat-conducting layer 6 and the electrical connector 5 do not need to occupy additional space in the battery pack. Through this structural design of the separator 3, multiple components can be integrated well without sacrificing the internal space of the battery pack, so as to achieve reasonable use of space and ensure the energy density of the battery pack.

[0066] As one optional embodiment of this application, an angle β is formed between the side plate 32 and the support plate 31, and the angle β is an obtuse angle. In this embodiment, since the support plate 31 and the side plate 32 form an obtuse angle, the flow area of ​​the exhaust channel 30 is larger, thereby improving the exhaust smoothness. Furthermore, while enabling the installation of the liquid cooling component 4, the electrical connector 5, and the heat-conducting layer 6, the size of the spacing space 7 in the first direction Z is effectively compressed, thereby improving the overall compactness of the battery pack layout, achieving higher space utilization, and optimizing the energy density of the battery pack.

[0067] Reference Figure 2 , Figure 9 and Figure 10 As one optional embodiment of this application, the battery pack further includes a first separator 81 and a second separator 82, both disposed in the accommodating cavity 9. Both the first separator 81 and the second separator 82 extend along a third direction Y, and both ends of the first separator 81 and the second separator 82 are connected to the inner wall of the bottom casing 11. In the second direction X, the first separator 81 and the second separator 82 are spaced apart to sequentially divide the accommodating cavity 9 into a first chamber 91, a second chamber 92, and a third chamber 93. The individual battery 2 is disposed in the second chamber 92.

[0068] The liquid cooling component 4 includes a plate 41, an inlet connector 42, and an outlet connector 43. Part of the plate 41 is placed in the second chamber 92, and another part of the plate 41 passes through the first partition 81 and extends into the first chamber 91. The part of the plate 41 located in the first chamber 91 is connected to the inlet connector 42 and the outlet connector 43.

[0069] To achieve the above technical solution, the liquid inlet connector 42 and the liquid outlet connector 43 are disposed in the first chamber 91, and the first chamber 91 and the second chamber 92 are separated. This separates the liquid inlet connector 42 and the liquid outlet connector 43 from the single cell 2, thereby reducing the impact on the liquid inlet connector 42 and the liquid outlet connector 43 when the single cell 2 experiences thermal runaway.

[0070] Reference Figure 10 As one of the optional embodiments of this application, the first chamber 91, the second chamber 92 and the third chamber 93 are sealed together. The second partition 82 is provided with an exhaust hole 820. The exhaust channel 30 is connected to the third chamber 93 through the exhaust hole 820. The bottom box 11 is provided with an explosion relief valve 1100, which is connected to the third chamber 93.

[0071] To achieve the above technical solution, a specific structure for gas discharge is proposed. One end of the exhaust channel 30 is sealed by the first partition 81. The gas in the exhaust channel 30 enters the third chamber 93 through the exhaust hole 820 along the second direction X and is finally discharged through the explosion relief valve 1100.

[0072] An electrical device comprising: a battery pack as described above.

[0073] The above description is only a partial implementation of the embodiments of this application and is not intended to limit the application in any way. The protection scope of the embodiments of this application is not limited thereto. Any simple modifications, equivalent changes and alterations that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A battery pack, characterized in that, Having intersecting first direction (Z) and second direction (X), the battery pack includes: A bottom box (11) and a cover plate (12), the bottom box (11) having a receiving cavity (9) with an opening (110) at one end along the first direction (Z), and the cover plate (12) being connected to the bottom box (11) and sealing the opening (110); Multiple individual batteries (2) are disposed in the accommodating cavity (9). Each individual battery (2) includes a housing (21) and an explosion-proof valve (22) disposed on the housing (21). The explosion-proof valve (22) is disposed on the side of the housing (21) away from the cover plate (12). The isolation component (3) and the liquid cooling component (4) are both disposed in the accommodating cavity (9). The isolation component (3) is disposed on the side of the outer shell (21) away from the cover plate (12), and the liquid cooling component (4) is disposed on the side of the isolation component (3) away from the single cell (2). The isolation member (3) is recessed on one side facing the outer shell (21) to form an exhaust channel (30), the exhaust channel (30) extends along the second direction (X), and at least a portion of the explosion-proof valve (22) is disposed facing the exhaust channel (30) in the first direction (Z). The exhaust channel (30) has a through hole (301) extending along the first direction (Z) on its wall surface. The liquid cooling component (4) has a recessed section (40) on the side facing the outer shell (21) to form a receiving groove (40), which is connected to the through hole (301).

2. The battery pack as described in claim 1, characterized in that, Multiple individual battery cells (2) are arranged along the second direction (X). Multiple receiving slots (40) are formed on the liquid cooling component (4). The multiple receiving slots (40) are arranged one-to-one with the explosion-proof valves (22). Multiple connecting holes (301) are opened on the wall of the exhaust channel (30) along the first direction (Z). The multiple connecting holes (301) are arranged one-to-one with the multiple explosion-proof valves (22). In the first direction (Z), at least a portion of the explosion-proof valve (22) is arranged facing the corresponding receiving slot (40) and the connecting hole (301).

3. The battery pack as described in claim 2, characterized in that, It also includes an electrical connector (5) disposed between the isolation member (3) and the liquid cooling member (4); The single battery cell (2) also includes an electrode post (23) disposed on the outer casing (21), the electrode post (23) being disposed on the side of the outer casing (21) away from the cover plate (12); The isolator (3) has an electrical connection hole (300) that extends along the first direction (Z), and the pole (23) passes through the electrical connection hole (300) and is electrically connected to the electrical connector (5).

4. The battery pack as described in claim 3, characterized in that, It also includes a heat-conducting layer (6), which is disposed between the electrical connector (5) and the liquid cooling component (4), and the electrical connector (5) is fixedly connected to the liquid cooling component (4) through the heat-conducting layer (6).

5. The battery pack as described in claim 1 or 2, characterized in that, It also includes a third direction (Y), where the first direction (Z), the second direction (X), and the third direction (Y) intersect each other; Multiple isolation members (3) are provided, and the multiple isolation members (3) are spaced apart along the third direction (Y), and each isolation member (3) extends along the second direction (X).

6. The battery pack as described in claim 5, characterized in that, The isolation element (3) includes: A support plate (31) is stacked on the side of the liquid cooling component (4) near the outer shell (21); Multiple side plates (32) are respectively disposed on both sides of the support plate (31) along the second direction (X). In the first direction (Z), one side of the side plate (32) is connected to the support plate (31), and the other side of the side plate (32) extends toward the outer shell (21). Multiple edge plates (33) are respectively disposed on the side of the side plate (32) away from the support plate (31), and along the first direction (Z), there is a gap space (7) between the edge plates (33) and the liquid cooling component (4); The side plate (32) and the support plate (31) together form the exhaust channel (30), and the connecting hole (301) is opened on the support plate (31).

7. The battery pack as described in claim 6, characterized in that, An angle (β) is formed between the side plate (32) and the support plate (31), and the angle (β) is an obtuse angle.

8. The battery pack as claimed in claim 1, characterized in that, It also includes a first partition (81) and a second partition (82), both of which are disposed in the accommodating cavity (9). In the second direction (X), the first partition (81) and the second partition (82) are spaced apart to divide the accommodating cavity (9) into a first chamber (91), a second chamber (92) and a third chamber (93) in sequence. The single cell (2) is disposed in the second chamber (92). The liquid cooling component (4) includes a plate (41), a liquid inlet connector (42), and a liquid outlet connector (43). A portion of the plate (41) is placed in the second chamber (92), and another portion of the plate (41) passes through the first partition (81) and extends into the first chamber (91). The portion of the plate (41) located in the first chamber (91) is connected to the liquid inlet connector (42) and the liquid outlet connector (43).

9. The battery pack as described in claim 8, characterized in that, The first chamber (91), the second chamber (92) and the third chamber (93) are sealed together. The second partition (82) is provided with an exhaust hole (820). The exhaust channel (30) is connected to the third chamber (93) through the exhaust hole (820). The bottom box (11) is provided with an explosion relief valve (1100) which is connected to the third chamber (93).

10. The battery pack as claimed in claim 1, characterized in that, It also includes a buffer layer (10), which is disposed on the side of the liquid cooling component (4) away from the single cell (2) and is in contact with the bottom box (11).

11. An electrical appliance, characterized in that, include: The battery pack as described in any one of claims 1-10.

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