Battery device and electric equipment

Abstract

The utility model relates to the technical field of battery equipment, and discloses a battery device and electric equipment. The battery device comprises a battery box, a single battery, an insulating part and a liquid leakage detection sensor, the battery box comprises a bottom wall, the single battery is contained in the battery box, the single battery and the bottom wall are arranged in the first direction, a pressure relief mechanism is arranged at the end, facing the bottom wall in the first direction, of the single battery, and the insulating part is arranged on the side, facing the single battery, of the bottom wall; a containing groove is formed in the side, facing the single battery, of the insulating part, at least part of the orthographic projection of the pressure relief mechanism is located in the outer contour of the orthographic projection of the containing groove on the projection plane perpendicular to the first direction, and the liquid leakage detection sensor is arranged in the containing groove. By applying the technical scheme of the invention, a user can timely find electrolyte leakage of the single battery of the battery device and timely maintain the single battery, so that the use reliability of the battery device is improved.

Description

Technical Field

[0001] This application belongs to the field of battery equipment technology, and in particular relates to a battery device and an electrical device. Background Technology

[0002] In related technologies, there is a risk of electrolyte leakage from individual battery cells in battery devices. Once leakage occurs, the electrolyte flows to the battery box walls, causing a short circuit between the individual cell and the box. This can lead to insulation failure of the individual cell or the entire battery device, affecting its overall reliability. Furthermore, because the individual cells are assembled inside the battery box, users may not notice electrolyte leakage in a timely manner, hindering timely maintenance. Utility Model Content

[0003] The purpose of this application is to provide a battery device and electrical equipment that enables users to promptly detect electrolyte leakage in individual battery cells and perform timely maintenance, thereby improving the reliability of the battery device.

[0004] To achieve the above objectives, according to a first aspect of an embodiment of this application, a battery device is provided, comprising:

[0005] Battery compartment, including the bottom wall;

[0006] A battery cell is housed inside a battery box and is arranged along a first direction with the bottom wall. A pressure relief mechanism is provided at the end of the battery cell facing the bottom wall along the first direction.

[0007] An insulating component is provided on the side of the bottom wall facing the battery cell. The side of the insulating component facing the battery cell has a receiving groove. On the projection plane perpendicular to the first direction, at least a portion of the orthographic projection of the pressure relief mechanism is located within the outer contour of the orthographic projection of the receiving groove.

[0008] A leak detection sensor is installed inside the container tank.

[0009] In this battery device, the individual battery cells are installed upside down inside the battery box, meaning the pressure relief mechanism of each cell faces the bottom wall of the battery box. When electrolyte leaks from the pressure relief mechanism, the electrolyte drips directly onto the bottom wall. To address this, the battery device is equipped with an insulating component with a receiving groove within it. Furthermore, on a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of the pressure relief mechanism lies within the outer contour of the orthographic projection of the receiving groove. This allows the electrolyte leaking from the pressure relief mechanism to drip onto the insulating component under its own gravity and flow into the receiving groove, or drip directly into the receiving groove. A leakage detection sensor is installed inside the receiving groove. When electrolyte reaches the receiving groove, it comes into contact with the leakage detection sensor, which then detects the electrolyte and sends an electrical signal indicating a leak in the individual battery cell. This alerts the user to the presence of a leaking battery cell, allowing for timely maintenance—repairing or replacing the leaking cell—improving the reliability of the battery device and enhancing the user experience.

[0010] In some embodiments, the orthographic projection of the pressure relief mechanism lies within the orthographic projection of the receiving tank on a projection plane perpendicular to the first direction. In this embodiment, the pressure relief mechanism is located directly above the receiving tank, so that the electrolyte leaking from the pressure relief mechanism drips directly into the receiving tank under its own gravity.

[0011] In some embodiments, the orthographic projection of the pressure relief mechanism surrounds the orthographic projection of the receiving tank on a projection plane perpendicular to the first direction. This ensures that any dripping electrolyte will flow to the receiving tank regardless of its direction of flow, and the leakage detection sensor will then detect the electrolyte.

[0012] In some embodiments, the insulating component is provided with multiple receiving slots, and the number of leakage detection sensors is also multiple, with each leakage detection sensor corresponding to one of the multiple receiving slots. This enables leakage monitoring of each individual battery cell, which helps improve the reliability of the battery device.

[0013] In some embodiments, on a projection plane perpendicular to the first direction, the outer contour of the orthographic projection of each receiving slot surrounds the orthographic projection of the pressure relief mechanism of multiple battery cells, which reduces the number of leakage detection sensors used and lowers costs; or, on a projection plane perpendicular to the first direction, the outer contour of the orthographic projection of each receiving slot corresponds to the orthographic projection surrounding the pressure relief mechanism of one battery cell, so that no matter which battery cell in the battery box leaks electrolyte, the corresponding leakage detection sensor can detect it accurately and in a timely manner, reducing the possibility of missed detection.

[0014] In some embodiments, the battery device further includes a battery cell group, which includes a plurality of battery cells arranged along a second direction, the first direction being perpendicular to the second direction. The battery device also includes a plurality of insulating members, each corresponding to one of the plurality of battery cell groups, with each insulating member located below the corresponding battery cell group.

[0015] In some embodiments, the battery device includes a battery cell and multiple insulating members, with each insulating member corresponding to one of the battery cells. Each insulating member is located below the corresponding battery cell and each insulating member has a receiving groove.

[0016] In some embodiments, the battery cell abuts against the insulating member; or, the battery cell and the insulating member are spaced apart.

[0017] In some embodiments, the bottom wall includes a body portion and a recessed portion. The recessed portion is formed by recessing from the body portion in a first direction away from the battery cell, and the recessed portion is disposed corresponding to a receiving groove in the first direction. The bottom of the receiving groove protrudes from the side of the insulating member away from the battery cell and is accommodated within the recessed portion. In this way, a portion of the insulating member is embedded and fitted onto the bottom wall, thereby reducing the space required for the insulating member to occupy in the battery box along the first direction, thereby increasing the volumetric energy density of the battery device.

[0018] In some embodiments, the bottom surface of the receiving tank is a plane and intersects the first direction at an acute angle. Furthermore, along the first direction, the leakage detection sensor is located at the position with the greatest distance between the bottom surface of the tank and the pressure relief mechanism. Dripping electrolyte flows along the bottom surface of the tank to the lowest point, where it comes into contact with the leakage detection sensor. The sensor then detects the electrolyte and sends an electrical signal, allowing the user to perform timely maintenance on the battery device.

[0019] In some embodiments, the bottom surface of the receiving groove is a plane and perpendicular to the first direction.

[0020] In some embodiments, a leak detection sensor is located below the pressure relief mechanism along a first direction.

[0021] In some embodiments, the battery cell includes a housing portion and electrode terminals disposed on the housing portion; the electrode terminals and the pressure relief mechanism are respectively disposed at both ends of the housing portion along a first direction.

[0022] In some embodiments, a battery cell includes a housing portion and electrode terminals disposed on the housing portion. The electrode terminals and the pressure relief mechanism are both located at the same end of the housing portion along a first direction. The battery cell includes a sampling component, which is at least electrically connected to the electrode terminals to obtain the voltage signal of the corresponding battery cell. By sampling and monitoring each battery cell through the sampling component, the charging and discharging operation of the battery cells can be monitored in real time. This allows the user to know the operating status of each battery cell in real time, enabling timely detection of any abnormalities and prompt maintenance, thus improving the reliability of the battery device. Furthermore, the sampling component is disposed on the surface of the battery cell facing the bottom wall and connected to a leakage detection sensor.

[0023] According to a second aspect of the embodiments of this application, an electrical device is provided. The electrical device includes an electrical load; and further includes a battery device as described above, wherein the electrical load is electrically connected to the battery device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a battery device according to an embodiment of this application;

[0026] Figure 2 for Figure 1 The diagram shows the structure of a single battery cell in the battery device. Figure 1 ;

[0027] Figure 3 for Figure 1 The diagram shows the structure of a single battery cell in the battery device. Figure 2 ;

[0028] Figure 4 for Figure 1 The diagram shows the assembly structure of the battery device's housing, insulating components, and leakage detection assembly.

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 for Figure 4 A schematic diagram of the decomposition process;

[0031] Figure 7 for Figure 6Enlarged view of point B in the middle;

[0032] Figure 8 This is an exploded view of an insulating component and a leakage detection assembly according to an embodiment of this application;

[0033] Figure 9 for Figure 8 The diagram shows the assembly structure of the insulating component and the leakage detection assembly.

[0034] Figure 10 for Figure 9 A cross-sectional schematic diagram of an embodiment in which the bottom of the receiving groove in the CC direction is flat.

[0035] Figure 11 for Figure 9 A cross-sectional schematic diagram of an embodiment in which the bottom of the receiving groove in the CC direction is an inclined surface;

[0036] Figure 12 This is an exploded view of another battery device according to an embodiment of this application;

[0037] Figure 13 for Figure 12 Enlarged view of point D in the middle;

[0038] Figure 14 for Figure 12 The diagram shows the structure of a single battery cell in the battery device.

[0039] Figure 15 This is a schematic diagram of the structure of an electrical device according to an embodiment of this application.

[0040] The figures in the diagram are labeled as follows:

[0041] 100. Battery cell packs;

[0042] 10. Battery cell; 11. Housing; 111. Top wall; 112. Bottom wall; 113. Large side wall; 114. Small side wall; 12. Electrode terminals; 13. Pressure relief mechanism;

[0043] 20. Battery box; 21. Box body; 211. Bottom wall; 2111. Main body; 2112. Recess; 22. Box cover; 23. Assembly space; 231. First space; 232. Second space; 24. Crossbeam;

[0044] 30. Insulating component; 31. Receiving groove; 32. Inclined surface;

[0045] 41. Leakage detection sensor; 42. Detection wiring harness; 43. Connector;

[0046] 50. Sampling component; 51. Wiring harness board; 52. Connector;

[0047] 60. Busbar;

[0048] 200. Battery device;

[0049] 400. Electrical equipment; 410. Electrical load; 420. Control device; 430. Chassis; 440. Wheel;

[0050] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0051] The embodiments of this application are described in detail below. Examples of these embodiments are shown 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 intended to explain this application, and should not be construed as limiting this application.

[0052] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0053] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants (battery devices used in these applications are generally referred to as energy storage batteries), but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars (battery devices used in these applications are generally referred to as power batteries).

[0056] In related technologies, with the increasing application of new energy electric machinery products, such as the popularization of electric vehicles, battery devices, as an important component of new energy electric machinery products, are receiving more and more attention from users regarding their reliability.

[0057] When batteries are assembled under complex and harsh operating conditions, the individual battery cells are prone to electrolyte leakage. If leakage occurs, the electrolyte will flow to the battery box walls, causing a short circuit between the individual cell and the box. This can lead to insulation failure of the individual cell or the entire battery pack, affecting the overall reliability of the battery pack. Furthermore, because the individual battery cells are assembled inside the battery box, even if electrolyte leakage occurs within a single cell, the user may not notice it in time, hindering timely maintenance.

[0058] Based on the above considerations, embodiments of this application provide a battery device in which individual battery cells are installed inverted within a battery casing, meaning the pressure relief mechanism of each cell faces the bottom wall of the battery casing. When electrolyte leaks from the pressure relief mechanism, the electrolyte drips directly onto the bottom wall. To address this, the battery device includes an insulating component with a receiving groove. The receiving groove is located below the pressure relief mechanism, and on a projection plane perpendicular to the first direction X, the orthographic projection of the pressure relief mechanism lies within the outer contour of the orthographic projection of the receiving groove. This allows the electrolyte leaking from the pressure relief mechanism to drip onto the insulating component under its own gravity and flow into the receiving groove, or drip directly into the receiving groove. Furthermore, a leakage detection sensor is installed inside the container. When electrolyte drips into the container, it comes into contact with the leakage detection sensor, which then detects the electrolyte and sends an electrical signal indicating that a single battery cell is leaking. This alerts the user to the presence of a leaking battery cell, allowing for timely maintenance, repair, or replacement of the leaking cell. This improves the reliability of the battery system and enhances the user experience.

[0059] To illustrate the technical solutions provided by the embodiments of this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0060] like Figure 2 , Figure 3 , Figure 12 and Figure 14 The spatial rectangular coordinate system O-XYZ is shown, and combined with Figure 10 and Figure 11 The planar rectangular coordinate system O-XZ is shown, where the X-axis represents the first direction X, the Y-axis represents the second direction Y, and the Z-axis represents the third direction Z.

[0061] According to a first aspect of the embodiments of this application, embodiments of this application provide a battery device 200. For example... Figures 1 to 6 , Figures 8 to 11 As shown, the battery device 200 includes a battery cell 10, a battery box 20, an insulating component 30, and a leakage detection sensor 41. The battery box 20 includes a bottom wall 211. The battery cell 10 is housed inside the battery box 20. The battery cell 10 and the bottom wall 211 are arranged along a first direction. A pressure relief mechanism 13 is provided at one end of the battery cell 10 facing the bottom wall 211 along the first direction. The insulating component 30 is provided on the side of the bottom wall 211 facing the battery cell 10. A receiving groove 31 is provided on the side of the insulating component 30 facing the battery cell 10. On a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of the pressure relief mechanism 13 is located within the outer contour of the orthographic projection of the receiving groove 31. The leakage detection sensor 41 is located inside the receiving groove 31.

[0062] Among them, "maximum opening range of pressure relief mechanism 13" is one of the design parameters of pressure relief mechanism 13, which is a fixed parameter value that has been designed and determined in the design stage of pressure relief mechanism 13.

[0063] In this battery device 200, the battery cell 10 is installed in the battery box 20 in an inverted manner, that is, the pressure relief mechanism 13 of the battery cell 10 faces the bottom wall 211 of the battery box 20. When electrolyte leaks from the pressure relief mechanism 13, the electrolyte will drip directly onto the bottom wall 211. To address this, the battery device 200 is provided with an insulating member 30 and a receiving groove 31 is provided on the insulating member 30. Furthermore, on a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of the pressure relief mechanism 13 is located within the outer contour of the orthographic projection of the receiving groove 31. This allows the electrolyte leaking from the pressure relief mechanism 13 to drip onto the insulating member 30 under its own gravity and flow into the receiving groove 31, or drip directly into the receiving groove 31. The leakage detection sensor 41 is installed inside the receiving tank 31. When the electrolyte reaches the receiving tank 31, the electrolyte will come into contact with the leakage detection sensor 41, that is, the leakage detection sensor 41 will detect the electrolyte. Then, the leakage detection sensor 41 will send an electrical signal that the battery cell 10 has leaked. Thus, the leakage detection sensor 41 will warn the user that the battery device 200 has a leaking battery cell 10, so that the user can maintain the battery device 200 in time, that is, repair or replace the leaking battery cell 10, which helps to improve the reliability of the battery device 200 and enhance the user experience.

[0064] In some embodiments, the orthographic projection of the pressure relief mechanism 13 is located within the orthographic projection of the receiving tank 31 on a projection plane perpendicular to the first direction X. In this embodiment, the pressure relief mechanism 13 is located directly above the receiving tank 31. Thus, the electrolyte leaking from the pressure relief mechanism 13 drips directly into the receiving tank 31 under its own gravity, and then the electrolyte comes into contact with the leakage detection sensor 41, that is, the leakage detection sensor 41 detects the electrolyte. Subsequently, the leakage detection sensor 41 sends an electrical signal indicating that leakage has occurred in the battery cell 10, thereby alerting the user that there is a leakage in the battery device 200, allowing the user to perform timely maintenance on the battery device 200.

[0065] In some embodiments, on a projection plane perpendicular to the first direction X, the orthographic projection of the pressure relief mechanism 13 surrounds the orthographic projection of the receiving groove 31. That is, in this embodiment, the receiving groove 31 is an annular groove, and the orthographic projection of the receiving groove 31 is annular in shape. The orthographic projection of the pressure relief mechanism 13 is located within the area surrounded by the annular orthographic projection of the receiving groove 31. In this embodiment, the electrolyte leaking from the pressure relief mechanism 13 drips onto the surface of the insulating member 30 surrounded by the annular receiving groove 31 under its own gravity. The electrolyte on this surface flows outward into the receiving groove 31, and then the electrolyte comes into contact with the leakage detection sensor 41, that is, the leakage detection sensor 41 detects the electrolyte. Subsequently, the leakage detection sensor 41 sends an electrical signal indicating that the battery cell 10 has leaked, thereby alerting the user that the battery device 200 has a battery cell 10 leaking, allowing the user to maintain the battery device 200 in a timely manner.

[0066] in:

[0067] In the embodiments of this application, the battery cell 10 can be a secondary battery, which refers to a battery cell 10 that can be recharged after discharge to activate the active materials and continue to be used. The battery cell 10 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this. Furthermore, the battery cell 10 provided in the embodiments of this application is a square battery cell, also referred to as a square cell. Of course, the battery cell 10 can also be a cylindrical battery cell, also referred to as a cylindrical cell. Taking a square battery cell 10 as an example... Figure 2 , Figure 3 and Figure 14As shown, the battery cell 10 includes a housing portion 11 and electrode terminals 12. The housing portion 11 has two large sidewalls 113 with larger surface areas along the second direction Y, two small sidewalls 114 with smaller surface areas along the third direction Z, and a bottom wall 112 and a top wall 111 along the first direction X. The two large sidewalls 113 and the two small sidewalls 114 are alternately connected to form prism-shaped sidewalls. The bottom wall 112 and the top wall 111 are located at the upper and lower ends of the prism-shaped sidewalls, respectively. In embodiments of this application, the bottom wall 112 may have structures such as electrode terminals 12 and pressure relief mechanisms 13, that is, the electrode terminals 12 and pressure relief mechanisms 13 are both located on the bottom wall 112 of the housing portion 11 along the first direction X; or, in other embodiments, the bottom wall 112 may have pressure relief mechanisms 13, and the top wall 111 may have electrode terminals 12, that is, the electrode terminals 12 and pressure relief mechanisms 13 may be located at the two ends of the housing portion 11 along the first direction X, respectively.

[0068] In the embodiments of this application, the electrolyte is a liquid electrolyte, comprising an electrolyte salt and a solvent. The electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate. The solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. Ether solvents may also be selected. Ether solvents may include one or more of the following: ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ethers. The electrolyte may also optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cells, such as additives that improve the overcharge / fast charge performance of the battery cells, additives that improve the high-temperature performance of the battery cells, and additives that improve the low-temperature performance of the battery cells.

[0069] In the embodiments of this application, the pressure relief mechanism 13 refers to an element or component that is activated to release internal pressure when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold. "Activation" means that the pressure relief mechanism 13 performs an action, thereby releasing the internal pressure and temperature of the battery cell 10. The action performed by the pressure relief mechanism 13 may include, but is not limited to, at least a portion of the pressure relief mechanism 13 rupturing, tearing, or melting, etc. After activation, the high-temperature flue gas inside the battery cell 10 will be discharged outward from the pressure relief mechanism 13. The predetermined threshold can be adjusted according to different design requirements. The predetermined threshold may depend on one or more of the materials of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 10. The pressure relief mechanism 13 may employ elements or components that are sensitive to pressure or temperature; that is, when the internal pressure or temperature of the battery cell 10 reaches the predetermined threshold, the pressure relief mechanism 13 is activated, thereby forming a channel for releasing internal pressure.

[0070] In the embodiments of this application, the leakage detection sensor 41 is, for example, a water immersion sensor that senses the liquid and converts the sensed changes in the liquid into electrical signals.

[0071] In the embodiments of this application, the insulating component 30 is a component for receiving dripping electrolyte, preventing the dripping electrolyte from directly contacting the battery box 20, reducing the possibility of insulation failure caused by the dripping electrolyte contacting the battery box 20, and the insulating component 30 is also a component for installing the leakage detection sensor 41.

[0072] The "inverted mounting method" in this application embodiment is defined in terms of the orientation of the pressure relief mechanism 13 of the battery cell 10, that is, the assembly method in which the pressure relief mechanism 13 of the battery cell 10 is always facing downwards. In contrast, the "normal mounting method" refers to the assembly method in which the pressure relief mechanism 13 of the battery cell 10 is always facing upwards.

[0073] like Figure 1 and Figure 12As shown, in some embodiments, the battery device 200 includes a plurality of battery cells 10, which are arranged to form at least one battery cell group 100. The battery cell group 100 extends along a second direction Y, meaning that the plurality of battery cells 10 are arranged along the second direction Y to form the battery cell group 100, where the second direction Y is perpendicular to the first direction X. The insulating member 30 is provided with a plurality of receiving grooves 31, each receiving groove 31 corresponding to a pressure relief mechanism 13 of at least one battery cell 10. Furthermore, there are multiple leakage detection sensors 41, each corresponding to one of the multiple receiving grooves 31. This enables leakage monitoring of each battery cell 10. When leakage is detected, the leakage detection sensor 41 will alert the user that a battery cell 10 in the battery device 200 is leaking, allowing the user to maintain the battery device 200 in a timely manner, thus improving the reliability of the battery device 200.

[0074] In some embodiments, a plurality of battery cells 10 may be arranged to form a battery cell group 100, that is, a plurality of battery cells 10 are arranged in a row along the second direction Y. Accordingly, see Figure 8 and Figure 9 As shown, multiple receiving tanks 31 are arranged in a row along the second direction Y, and multiple leakage detection sensors 41 are also arranged in a row along the second direction Y. The multiple leakage detection sensors 41 are installed one-to-one in the multiple receiving tanks 31.

[0075] In some embodiments, the plurality of receiving slots 31 correspond one-to-one with and face the pressure relief mechanisms 13 of the plurality of battery cells 10. That is, on the projection plane perpendicular to the first direction X, the outer contour of the orthographic projection of each receiving slot 31 corresponds to the orthographic projection surrounding the pressure relief mechanism 13 of one battery cell 10, thus enabling the detection of multiple battery cells 10. In this way, no matter which battery cell 10 in the battery box 20 leaks electrolyte, the corresponding leakage detection sensor 41 can accurately and timely detect it, reducing the possibility of missed detection, and promptly sending an electrical signal indicating that the battery cell 10 has leaked. This allows the user to quickly know which specific battery cell 10 has leaked, and then accurately locate and efficiently maintain the leaking battery cell 10 in the battery device 200.

[0076] In some embodiments, such as Figure 1 and Figure 12 As shown, multiple battery cells 10 can be arranged to form multiple battery cell groups 100, and the multiple battery cell groups 100 are arranged along a third direction Z. Specifically, the first direction X and the second direction Y are perpendicular to each other in the third direction Z. See also... Figures 4 to 6 , Figure 12As shown, multiple receiving slots 31 are arranged in multiple columns corresponding one-to-one with multiple battery cell groups 100, and each of the multiple receiving slots 31 corresponds one-to-one with the pressure relief mechanism 13 of each of the multiple battery cells 10 (that is, on the projection plane perpendicular to the first direction X, the outer contour of the orthographic projection of each receiving slot 31 corresponds to the orthographic projection of the pressure relief mechanism 13 of one battery cell 10). Multiple leakage detection sensors 41 are also arranged in multiple columns and installed one-to-one in the multiple receiving slots 31. In this way, it is possible to detect whether any battery cell 10 has leaked, thereby promptly alerting the user that there is a leakage in the battery device 200, allowing the user to maintain the battery device 200 in a timely manner.

[0077] In some embodiments, on a projection plane perpendicular to the first direction X, the outer contour of the orthographic projection of each receiving slot 31 surrounds the orthographic projection of the pressure relief mechanism 13 of the plurality of battery cells 10. That is, the pressure relief mechanism 13 of the plurality of battery cells 10 corresponds to one receiving slot 31 and one leakage detection sensor 41 disposed within the receiving slot 31. This reduces the number of leakage detection sensors 41 used, thereby reducing costs.

[0078] In some embodiments, regardless of whether the battery device 200 includes only a single battery cell 10, a battery cell group 100 composed of multiple battery cells 10, or multiple battery cell groups 100 composed of multiple battery cells 10, the battery device 200 includes only one insulating member 30. That is, only one integral insulating member 30 is provided between the battery cell 10 and the bottom wall 211, and one or more receiving grooves 31 are provided on the insulating member 30. This reduces the number of insulating members 30, that is, reduces the number of parts in the battery device 200 during assembly and production, which is beneficial to improving assembly efficiency.

[0079] In some embodiments, when the plurality of battery cells 10 of the battery device 200 are arranged to form a plurality of battery cell groups 100, such as Figure 6 and Figure 12 As shown, the battery device 200 includes multiple insulating members 30. The extending direction of the insulating members 30 is parallel to the extending direction of the battery cell pack 100, that is, the insulating members 30 extend along the second direction Y. Each insulating member 30 corresponds one-to-one with a plurality of battery cell packs 100. Furthermore, see... Figure 4 , Figure 6 , Figure 8 and Figure 9As shown, each insulating component 30 has a mutually separated and independent receiving groove 31 along the second direction Y. The pressure relief mechanism 13 of the multiple battery cells 10 of the battery cell group 100 corresponding to the insulating component 30 corresponds one-to-one with the multiple receiving grooves 31 on the insulating component 30. In this way, when assembling and producing the battery device 200, the appropriate number of insulating components 30 can be selected according to the number of battery cell groups 100, so that the insulating components 30 have flexible adaptability.

[0080] In some embodiments, the battery device 200 includes a plurality of battery cells 10 and a plurality of insulating members 30. The plurality of battery cells 10 are arranged to form a plurality of battery cell groups 100, which extend along a second direction Y and are arranged along a third direction Z, wherein the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The plurality of insulating members 30 are distributed one-to-one with the plurality of battery cells 10; in this embodiment, each insulating member 30 has only one receiving groove 31.

[0081] In some embodiments, the battery device 200 includes a plurality of battery cells 10 and a plurality of insulating members 30. The plurality of battery cells 10 are arranged to form a plurality of battery cell groups 100, which extend along a second direction Y and are arranged along a third direction Z, wherein the first direction X, the second direction Y, and the third direction Z are mutually perpendicular. A plurality of sequentially adjacent battery cells 10 in a battery cell group 100 correspond to an insulating member 30, and the insulating member 30 is provided with a plurality of receiving grooves 31 opposite to the pressure relief mechanisms 13 of the corresponding plurality of battery cells 10.

[0082] In some embodiments, the battery device 200 includes a plurality of battery cells 10 and a plurality of insulating members 30. The plurality of battery cells 10 are arranged to form a plurality of battery cell groups 100, which extend along a second direction Y and are arranged along a third direction Z. Furthermore, along the third direction Z, a plurality of adjacent battery cells 10 in a plurality of adjacent battery cell groups 100 correspond to an insulating member 30, and the insulating member 30 is provided with a plurality of receiving grooves 31 opposite to the pressure relief mechanism 13 of the corresponding plurality of battery cells 10.

[0083] In some embodiments, the battery device 200 includes a plurality of battery cells 10 and a plurality of insulating members 30. The plurality of battery cells 10 are arranged to form a plurality of battery cell groups 100, which extend along a second direction Y and are arranged along a third direction Z. In one battery cell group 100, a plurality of sequentially adjacent battery cells 10 correspond to one insulating member 30. The insulating member 30 has a plurality of receiving grooves 31 opposite to the pressure relief mechanisms 13 of the corresponding plurality of battery cells 10. Furthermore, along the third direction Z, a plurality of sequentially adjacent battery cells 10 between adjacent battery cell groups 100 correspond to one insulating member 30, and the insulating member 30 has a plurality of receiving grooves 31 opposite to the pressure relief mechanisms 13 of the corresponding plurality of battery cells 10.

[0084] In some embodiments, the two shoulders of the battery cell 10 facing the insulating member 30 along the third direction Z abut against the circumferential region of the receiving groove 31 of the insulating member 30. In this embodiment, there is a gap between the bottom of the receiving groove 31 and the pressure relief mechanism 13, so that the pressure relief mechanism 13 can be smoothly actuated and opened to relieve pressure when the battery cell 10 experiences thermal runaway. Since the battery cell 10 abuts against the insulating member 30, the ineffective space between the insulating member 30 and the battery cell 10 is minimized, thereby improving the volumetric energy density of the battery device 200.

[0085] To further ensure that the pressure relief mechanism 13 can always be smoothly actuated and opened to relieve pressure when the battery cell 10 experiences thermal runaway, in some embodiments, the battery cell 10 and the insulating member 30 are spaced apart. This increases the distance between the bottom of the receiving groove 31 and the pressure relief mechanism 13, so even if some large fragments are ejected when the battery cell 10 experiences thermal runaway, it will not cause blockage between the bottom of the receiving groove 31 and the pressure relief mechanism 13, ensuring that the pressure relief mechanism 13 is always in a pressure relief working state and improving the working reliability of the pressure relief mechanism 13.

[0086] like Figure 11As shown, in some embodiments, the bottom surface of the receiving tank 31 opposite to the pressure relief mechanism 13 is a plane, and the bottom surface is set to intersect the first direction X at an acute angle, that is, the bottom surface is set as an inclined plane 32 relative to the surface of the bottom wall 112. In other words, with the surface of the bottom wall 112 as the horizontal reference plane, the bottom surface of the receiving tank 31 is inclined. Furthermore, along the first direction X, the leakage detection sensor 41 is located at the position where the distance between the inclined plane 32 and the pressure relief mechanism 13 is the greatest. That is, along the first direction X, the leakage detection sensor 41 is located at the lowest point of the bottom of the receiving tank 31 relative to the pressure relief mechanism 13. In this way, when the pressure relief mechanism 13 of the battery cell 10 leaks electrolyte and drips to the bottom of the receiving tank 31, due to the characteristic of liquids flowing downhill, the dripping electrolyte will flow along the bottom surface of the tank to the lowest point of the tank. Then, the electrolyte comes into contact with the leakage detection sensor 41, which detects the electrolyte and sends an electrical signal, thereby promptly alerting the user that there is a leakage in the battery cell 10 of the battery device 200, so that the user can maintain the battery device 200 in a timely manner.

[0087] like Figure 10 As shown, in some embodiments, the bottom surface of the receiving tank 31 opposite to the pressure relief mechanism 13 is a plane perpendicular to the first direction X, and the leakage detection sensor 41 is disposed below the pressure relief mechanism 13 along the first direction X. Furthermore, the leakage detection sensor 41 is preferably disposed directly below the pressure relief mechanism 13 along the first direction X, because the weakest opening position of the pressure relief mechanism 13 is generally located in the middle of the pressure relief mechanism 13, and this weakest opening position is most prone to electrolyte leakage. By disposing of the leakage detection sensor 41 directly below the pressure relief mechanism 13, the electrolyte leaking from the pressure relief mechanism 13 will drip directly onto the leakage detection sensor 41 under its own gravity, thereby quickly detecting leakage in the battery cell 10. In this embodiment, when electrolyte leaks from the pressure relief mechanism 13 of the battery cell 10 and drips to the bottom of the receiving tank 31, the leaked electrolyte will drip directly onto the leakage detection sensor 41 located below the pressure relief mechanism 13 along the first direction X. The leakage detection sensor 41 can then detect the electrolyte immediately and send an electrical signal, promptly alerting the user that a battery cell 10 is leaking from the battery device 200, allowing the user to maintain the battery device 200 in a timely manner. Furthermore, compared to a sloped bottom surface of the receiving tank 31, the bottom surface of the receiving tank 31 in this embodiment is a plane perpendicular to the first direction X. This reduces the height of the insulating component 30 along the first direction X, thus reducing the space occupied by the insulating component 30 within the battery box 20, thereby improving the volumetric energy density of the battery device 200.

[0088] like Figure 2 and Figure 3As shown, in some embodiments, the battery cell 10 includes a housing portion 11 and electrode terminals 12 disposed on the housing portion 11. The electrode terminals 12 and the pressure relief mechanism 13 may be respectively disposed at both ends of the housing portion 11 along the first direction X, that is, the electrode terminals 12 are disposed on the top wall 111 of the housing portion 11, and the pressure relief mechanism 13 is disposed on the bottom wall 112 of the housing portion 11. In other embodiments, the electrode terminals 12 and the pressure relief mechanism 13 may both be disposed at one end of the housing portion 11 facing the bottom wall 211. In addition, in other embodiments, the electrode terminals 12 may also be disposed on the side wall of the housing portion 11 along the second direction Y, or may be disposed on the side wall of the housing portion 11 along the third direction Z, and the pressure relief mechanism 13 may be disposed at the end of the housing portion 11 facing the bottom wall 211. In other words, by using the receiving groove 31 of the insulating component 30 to receive the dripping electrolyte and the leakage detection sensor 41 installed in the receiving groove 31 to detect the dripping electrolyte, the insulating component 30 of this application can be applied to battery cells 10 with electrode terminals 12 located at different positions of the housing portion 11. It only needs to satisfy that the pressure relief mechanism 13 is located at the end of the housing portion 11 facing the bottom wall 211, which has high versatility.

[0089] To reduce the space occupied by the insulating component 30 within the battery box 20, thereby increasing the volumetric energy density of the battery device 200, such as... Figure 6 and Figure 7 As shown, in some embodiments, the bottom wall 211 includes a body portion 2111 and a recessed portion 2112. The recessed portion 2112 is formed by recessing from the body portion 2111 in a direction away from the battery cell 10 along a first direction X. The recessed portion 2112 is provided corresponding to the receiving groove 31, such as... Figure 10 and Figure 11 As shown, the bottom of the receiving groove 31 protrudes from the side of the insulating member 30 away from the battery cell 10 and is housed in the recess 2112. In this way, a portion of the insulating member 30 is embedded in the bottom wall 211, which reduces the space required for the insulating member 30 in the battery box 20 along the first direction X, thereby increasing the volumetric energy density of the battery device 200.

[0090] like Figure 14 As shown, in some embodiments, the battery cell 10 includes a housing portion 11 and electrode terminals 12 disposed on the housing portion 11, and the electrode terminals 12 and the pressure relief mechanism 13 are located at the same end of the housing portion 11 along the first direction X, that is, the electrode terminals 12 and the pressure relief mechanism 13 are both disposed on the bottom end wall 112 of the housing portion 11. Figure 12 and Figure 13As shown, the battery device 200 includes a sampling component 50 housed within the battery case 20. The sampling component 50 extends along a second direction Y. One sampling component 50 is correspondingly disposed for each battery cell group 100. The sampling component 50 includes a wiring harness plate 51 located between two rows of electrode terminals 12 of the corresponding battery cell group 100 along the second direction Y. An insulating member 30 is disposed between the wiring harness plate 51 and the housing portion 11, i.e., the insulating member 30 insulates and isolates the wiring harness plate 51 from the housing portion 11. The wiring harness plate 51 has multiple connection ends 52, which are electrically connected to multiple electrode terminals 12 one-to-one. That is, the sampling component 50 is at least used to electrically connect the electrode terminals 12 to obtain the voltage signal of the corresponding battery cell 10. Furthermore, the sampling component 50 is disposed on the end surface of the battery cell 10 facing the bottom wall 211 and connected to a leakage detection sensor 41. The leakage detection sensor 41 also includes a detection wiring harness 42, which is integrated into the wiring harness plate 51. In this embodiment, the sampling component 50 samples and monitors each battery cell 10, thereby monitoring the charging and discharging operation of the battery cell 10 in real time. This allows the user to know the operating status of each battery cell 10 in real time, and to promptly identify any abnormalities in a particular battery cell 10, enabling timely maintenance and improving the operational reliability of the battery device 200. Furthermore, the integrated wiring harness 42 of the leakage detection sensor 41 with the wiring harness board 51 of the sampling component 50 not only reduces the number of parts required for assembling the battery device 200, but also makes the internal wiring of the battery device 200 neater and simpler, reducing the space required for wiring harness routing and thus improving the volumetric energy density of the battery device 200.

[0091] In embodiments of this application, the battery device 200 includes a housing 21, a cover 22, and a plurality of battery cells 10 as described above. The cover 22 closes onto the open end of the housing 21, and the housing 21 and the cover 22 together form an assembly space 23. Figure 1 , Figures 4 to 7 As shown, the battery box 20 has a crossbeam 24 extending Z-direction, which divides the assembly space 23 into a first space 231 and a second space 232. Battery cells 10 are installed in the first space 231. When the battery device 200 includes multiple battery cells 10, the multiple battery cells 10 are connected in series, parallel, or mixed configurations via a busbar 60. Furthermore, the battery device 200 also includes a battery management system, such as... Figure 1 , Figures 4 to 7As shown, the battery management system is located in the second space 232 of the battery box 20. The connector 43 connected to the end of the detection harness 42 and the harness of the harness board 51 are both electrically connected to the battery management system. When the leakage detection sensor 41 detects dripping electrolyte, the electrical signal emitted by the leakage detection sensor 41 is transmitted to the battery management system. Upon receiving the electrical signal from the leakage detection sensor 41, the battery management system triggers an alarm, such as issuing a buzzer alarm or illuminating a corresponding fault light. This timely alerts the user, allowing them to maintain the battery device 200 promptly. Furthermore, the battery management system automatically controls power-off protection upon receiving the electrical signal from the leakage detection sensor 41, reducing the possibility of damage to electrical equipment. In the embodiments of this application, the battery management system can achieve the following monitoring advantages: real-time monitoring, providing 24-hour uninterrupted monitoring of electrolyte leakage in the battery cells 10 inside the battery device 200; precise location, accurately locating the leakage point, i.e., identifying which battery cell 10 is leaking electrolyte, ensuring that the failed battery cell 10 can be immediately located during failure analysis, automatically controlling power-off protection and promptly reminding the user for maintenance to prevent the problem from recurring; traceability, recording information such as the time of leakage event in the battery cell 10 and the location of the leaking battery cell 10, facilitating later query and analysis; background monitoring, enabling real-time monitoring and management through alarms from the battery management system; and high safety, enabling timely detection of potential leakage hazards, which helps prevent accidents.

[0092] According to a second aspect of the embodiments of this application, an electrical appliance 400 is provided, such as... Figure 15 As shown. The electrical device 400 includes a battery device 200, meaning the electrical device 400 uses one battery device 200 or multiple battery devices 200 connected in series, parallel, or a combination thereof, and the electrical load 410 is electrically connected to the battery device 200. The battery device 200 is used to store electrical energy, or to provide electrical energy to the electrical load 410, thereby enabling the electrical load 410 to operate normally.

[0093] Electrical equipment 400 includes, but is not limited to, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys may include, but are not limited to, stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft may include, but are not limited to, airplanes, rockets, space shuttles, and spacecraft.

[0094] In the embodiments of this application, the electrical equipment 400 is an electric vehicle, and it is assembled using a battery device 200, such as... Figure 15As shown, the battery device 200 is mounted on the frame 430 of the electric vehicle. The electric vehicle includes the frame 430, a drive motor, and wheels 440. The battery device 200 and the drive motor are both fixedly mounted on the frame 430, and the wheels 440 are rotatably connected to the frame 430. The battery device 200 is electrically connected to the drive motor, and the drive motor is driven by the wheels 440. When the battery device 200 provided in this application supplies power to the drive motor (the drive motor is one of the electrical loads 410 of the electrical equipment 400), the drive motor drives the wheels 440 to rotate, enabling the electric vehicle to drive normally. Furthermore, the electric vehicle includes a control device 420, which is mounted on the frame 430 and electrically connected to the battery device 200. The control device 420 is used to control and monitor the charging and discharging status of the battery device 200. In some electric vehicles, the battery housing of the battery device 200 can be part of the chassis structure of the electric vehicle. For example, a portion of the battery box can be at least part of the floor of the electric vehicle, or a portion of the battery box can be at least part of the crossbeams and longitudinal beams of the electric vehicle.

[0095] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized by, include: Battery compartment, including the bottom wall; A battery cell is housed inside the battery box and is arranged along the bottom wall in a first direction. The end of the battery cell facing the bottom wall along the first direction is provided with a pressure relief mechanism. An insulating component is provided on the side of the bottom wall facing the battery cell. The side of the insulating component facing the battery cell has a receiving groove. On a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of the pressure relief mechanism is located within the outer contour of the orthographic projection of the receiving groove. A leakage detection sensor is disposed within the receiving tank.

2. The battery device according to claim 1, characterized in that, On a projection plane perpendicular to the first direction, the orthographic projection of the pressure relief mechanism lies within the orthographic projection of the receiving groove.

3. The battery device according to claim 1, characterized in that, On a projection plane perpendicular to the first direction, the orthographic projection of the pressure relief mechanism surrounds the orthographic projection of the receiving groove.

4. The battery device according to claim 1, characterized in that, The insulating component is provided with a plurality of receiving grooves, and the number of leakage detection sensors is a plurality of them, with each of the plurality of leakage detection sensors corresponding to one of the plurality of receiving grooves.

5. The battery device according to claim 4, characterized in that, On a projection plane perpendicular to the first direction, the outer contour of the orthographic projection of each of the receiving slots surrounds the orthographic projection of the pressure relief mechanism of the plurality of battery cells; or, On a projection plane perpendicular to the first direction, the outer contour of the orthographic projection of each of the receiving slots corresponds to the orthographic projection of the pressure relief mechanism surrounding one of the battery cells.

6. The battery device according to claim 5, characterized in that, The battery device further includes a battery cell group, which comprises a plurality of battery cells arranged along a second direction, wherein the first direction is perpendicular to the second direction. The battery device includes multiple insulating components, each of which corresponds to one of the multiple battery cell groups, with each insulating component located below the corresponding battery cell group.

7. The battery device according to claim 4, characterized in that, The battery device includes multiple battery cells and multiple insulating components. The multiple insulating components are arranged in a one-to-one correspondence with the multiple battery cells. Each insulating component is located below the corresponding battery cell, and each insulating component is provided with a receiving groove.

8. The battery device according to claim 1, characterized in that, The battery cell abuts against the insulating member; or... The battery cells and the insulating components are spaced apart.

9. The battery device according to claim 1, characterized in that, The bottom wall includes a body portion and a recessed portion. The recessed portion is formed by recessing from the body portion in a direction away from the battery cell along the first direction. Along the first direction, the recessed portion is disposed corresponding to the receiving groove.

10. The battery device according to claim 9, characterized in that, The bottom surface of the receiving groove is a plane and intersects the first direction at an acute angle.

11. The battery device according to claim 10, characterized in that, Along the first direction, the leakage detection sensor is located at the position where the distance between the bottom surface of the tank and the pressure relief mechanism is the greatest.

12. The battery device according to claim 1, characterized in that, The bottom surface of the receiving groove is a plane and perpendicular to the first direction.

13. The battery device according to claim 12, characterized in that, The leakage detection sensor is located below the pressure relief mechanism along the first direction.

14. The battery device according to claim 1, characterized in that, The battery cell includes a housing portion and electrode terminals disposed on the housing portion; The electrode terminals and the pressure relief mechanism are respectively located at both ends of the housing portion along the first direction.

15. The battery device according to any one of claims 1-14, characterized in that, The battery cell includes a housing portion and electrode terminals disposed on the housing portion. The electrode terminals and the pressure relief mechanism are both located at the same end of the housing portion along the first direction. The battery device also includes a sampling component, which is at least used to electrically connect the electrode terminals to obtain the voltage signal of the corresponding battery cell. The sampling component is disposed on the surface of the battery cell facing the bottom wall and connected to the leakage detection sensor.

16. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-15.

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