Battery tray and battery pack and electric device having the same

Abstract

The utility model discloses a kind of battery tray and the battery pack with it, electric device, the battery tray includes: tray, the tray is defined in and stores battery monomer's containing cavity;Liquid leakage detection zone, the liquid leakage detection zone is located in the bottom wall of the containing cavity, the liquid leakage detection zone includes the first wire and the second wire of interval arrangement, the first end of the first wire and the first end of the second wire are respectively adapted to with detection unit electric connection, the liquid leakage detection zone is configured as the first wire and the second wire can be conducted through electrolyte. According to the battery tray of the utility model embodiment, whether the electrolyte of battery monomer is leaked is detected using whether the first wire and the second wire form passage, so that detection is simpler, faster, and liquid leakage condition of battery monomer is facilitated to discover in time.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery tray and a battery pack and power-consuming device having the same. Background Technology

[0002] In related technologies, battery leakage detection devices are used to detect leakage of individual battery cells in a battery pack. The leakage detection device includes two acquisition ends, one of which is connected to the battery pack casing, and the other is connected to the conductive material of the leakage detection strip. When electrolyte leaks from a battery cell in the battery pack and accumulates on the battery pack casing, it causes a change in the resistance between the casing and the leakage detection strip. By detecting the change in resistance between the casing and the leakage detection strip, a fault alarm is triggered. However, it takes a long time for the electrolyte to accumulate on the casing before the change in resistance between the casing and the leakage detection strip can be detected, which has a certain lag. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery tray that uses the presence or absence of a conductive path formed by a first wire and a second wire to detect whether electrolyte leakage has occurred in a single battery cell, making the detection simpler, faster, and easier to promptly identify leakage in the battery cell.

[0004] This utility model also proposes a battery pack having the aforementioned battery tray.

[0005] A battery tray according to a first aspect of the present invention includes: a tray defining a cavity for holding a single battery cell; and a leakage detection strip disposed on the bottom wall of the cavity. The leakage detection strip includes a first wire and a second wire spaced apart, a first end of the first wire and a first end of the second wire being adapted to be electrically connected to a detection unit, and the leakage detection strip being configured such that the first wire and the second wire can be connected through an electrolyte.

[0006] According to the battery tray of this utility model embodiment, the presence or absence of a circuit formed by the first wire and the second wire is used to detect whether the electrolyte of the battery cell is leaking, making the detection simpler and faster, and facilitating timely detection of leakage in the battery cell.

[0007] In addition, the battery tray according to the above embodiments of the present invention may also have the following additional technical features:

[0008] According to some embodiments of the present invention, a first insulating element is provided between the tray and the leakage detection strip.

[0009] According to some optional embodiments of the present invention, the battery tray further includes a soluble second insulating element that wraps around the first wire and the second wire. The second insulating element is adapted to be dissolved upon contact with the electrolyte, and the first insulating element and the second insulating element are made of different materials.

[0010] According to some embodiments of the present invention, the receiving cavity includes a placement area for supporting the battery cell, and the leakage detection strip extends around the placement area.

[0011] According to some optional embodiments of the present invention, the bottom wall of the receiving cavity defines a guiding surface that extends downward at an angle away from the placement area, and the guiding surface is used to guide liquid to the leakage detection strip.

[0012] According to some specific embodiments of this utility model, the angle between the guide surface and the horizontal plane is 5°-10°.

[0013] According to some optional embodiments of the present invention, the leakage detection strip is laid on the guide surface.

[0014] According to some specific embodiments of this utility model, the guide surface is an annular guide surface extending around the placement area.

[0015] According to some optional embodiments of the present invention, the tray includes a base and a bottom plate, the bottom plate being fixed to the base and together defining the receiving cavity, the base having an annular boss and a support portion, the support portion being located inside the boss, the top surface of the boss being higher than the support portion, at least a portion of the top surface of the boss defining the guide surface, the bottom plate being supported by the support portion, and the bottom plate defining the placement area.

[0016] According to some embodiments of the present invention, the first conductor and the second conductor are arranged in parallel.

[0017] A battery pack is provided according to a second aspect of the present invention, the battery pack including a battery tray as described in the first aspect of the present invention.

[0018] According to the battery pack of the present invention, by using the battery tray described in the first aspect of the present invention, the leakage of electrolyte in the battery cell is detected by whether the first wire and the second wire form a circuit, making the detection simpler and faster, and facilitating timely detection of leakage in the battery cell.

[0019] According to a third aspect of the present invention, an electrical device is provided, the electrical device comprising a battery pack as described in a second aspect of the present invention.

[0020] According to the embodiments of the present invention, the electrical device utilizes the battery pack described in the second aspect of the present invention to detect whether the electrolyte of a battery cell is leaking by using whether the first wire and the second wire form a circuit, making the detection simpler and faster, and facilitating timely detection of electrolyte leakage in battery cells.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the battery tray according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the battery tray according to an embodiment of the present utility model;

[0025] Figure 3 This is a partial structural schematic diagram of the battery tray according to an embodiment of the present utility model;

[0026] Figure 4 yes Figure 3 Sectional view at point AA;

[0027] Figure 5 yes Figure 4 Enlarged view of the structure in the central region;

[0028] Figure 6 This is a cross-sectional view of the battery tray according to an embodiment of the present utility model;

[0029] Figure 7 yes Figure 6 Enlarged view of the structure in the central region.

[0030] Reference numerals: 1. Battery tray; 10. Tray; 101. Base support; 1011. Boss; 1012. Support; 102. Base plate; 11. Receiving cavity; 111. Placement area; 112. Guide surface;

[0031] 20. Leakage detection strip; 21. First lead wire; 22. Second lead wire;

[0032] 31. First insulating component; 32. Second insulating component. Detailed Implementation

[0033] The embodiments of this utility model 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] The battery tray 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0035] like Figures 1-7 As shown, the battery tray 1 according to an embodiment of the present invention includes a tray 10 and a leakage detection strip 20.

[0036] The tray 10 defines a cavity 11 for holding individual battery cells. A leakage detection strip 20 is disposed on the bottom wall of the cavity 11. The leakage detection strip 20 includes a first wire 21 and a second wire 22 spaced apart. The first end of the first wire 21 and the first end of the second wire 22 are respectively adapted to be electrically connected to a detection unit. The leakage detection strip 20 is configured such that the first wire 21 and the second wire 22 can be connected through the electrolyte, so that when the electrolyte in the battery cell leaks, a path can be formed between the first wire 21 and the second wire 22, thereby enabling timely detection of electrolyte leakage, which helps to improve the safety of battery use and reduce safety hazards.

[0037] Specifically, when the electrolyte in a battery cell leaks, it flows into the bottom wall of the receiving cavity 11. Since the electrolyte is conductive, it can conduct electricity when it comes into contact with the first wire 21 and the second wire 22. At this time, a path is formed between the first wire 21 and the second wire 22, and the detection unit can obtain an electrical signal. Then, it can determine whether the battery cell in the receiving cavity 11 has leaked based on whether a path is formed between the first wire 21 and the second wire 22.

[0038] Specifically, when electrolyte leakage occurs in a battery cell, the electrolyte can easily come into contact with the first wire 21 and the second wire 22, and electrically connect the first wire 21 and the second wire 22 to form a path between the first wire 21 and the second wire 22, thereby detecting the leakage of the battery cell. This process is relatively simple and takes less time, making it easy to detect the leakage of the battery cell in a timely manner.

[0039] According to the battery tray 1 of this utility model embodiment, when the electrolyte of a battery cell leaks, the electrolyte can electrically connect the first wire 21 and the second wire 22 to form a passage between the first wire 21 and the second wire 22. This process is simple and takes less time. Using this method to detect whether the electrolyte of the battery cell has leaked makes the detection simpler, faster, and easier to detect the leakage of the battery cell in a timely manner.

[0040] Therefore, according to the battery tray 1 of this utility model embodiment, the detection of whether the electrolyte of the battery cell has leaked is made by whether the first wire 21 and the second wire 22 form a passage, making the detection simpler and faster, and making it easier to detect the leakage of the battery cell in a timely manner.

[0041] The battery tray 1 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0042] In some specific embodiments of this utility model, such as Figures 1-7 As shown, the battery tray 1 includes a tray 10 and a leakage detection strip 20.

[0043] In some embodiments of this utility model, such as Figure 4 , Figure 5 As shown, a first insulating element 31 is provided between the tray 10 and the leakage detection strip 20. The first insulating element 31 is used to separate the tray 10 and the leakage detection strip 20, so as to prevent the tray 10 from being electrically connected to the first wire 21 and the second wire 22 when the tray 10 is made of conductive metal, so as to avoid affecting the leakage detection strip 20's detection of whether the electrolyte has leaked.

[0044] Meanwhile, by using the first insulating element 31 to separate the tray 10 and the leakage detection strip 20, the risk of arcing caused by the wires overlapping with the tray 10 can be avoided, which can improve the safety of use.

[0045] In some embodiments, the tray 10 is made of aluminum alloy. Since aluminum alloy is conductive, if the first wire 21 and the second wire 22 are directly placed on the tray 10, the tray 10 will be directly electrically connected to the first wire 21 and the second wire 22. That is to say, regardless of whether the electrolyte of the battery cell leaks, a path is formed between the first wire 21 and the second wire 22, so that the leakage detection band 20 cannot detect whether the electrolyte in the battery cell in the receiving cavity 11 has leaked.

[0046] Therefore, a first insulating element 31 needs to be installed between the tray 10 and the leakage detection strip 20 to separate the tray 10 and the leakage detection strip 20, and to prevent the tray 10 from being electrically connected to the first wire 21 and the second wire 22. In this way, when there is no leakage of electrolyte in the battery cell, the first wire 21 and the second wire 22 will not be electrically connected. When there is leakage of electrolyte in the battery cell, since the electrolyte is electrically connected to the first wire 21 and the second wire 22, a circuit is formed between the first wire 21 and the second wire 22. It is possible to determine whether there is leakage of electrolyte in the battery cell based on whether the first wire 21 and the second wire 22 form a circuit.

[0047] In some other embodiments of this invention, the tray 10 is an insulating plastic component, such as PC (polycarbonate) or PPS (polyphenylene sulfide). When the first wire 21 and the second wire 22 are placed on the tray 10, the tray 10 will not cause the first wire 21 and the second wire 22 to be connected. That is, when the tray 10 itself is an insulating component, it is not necessary to place an insulating component between the tray 10 and the leakage detection strip 20.

[0048] In some other optional embodiments of this utility model, such as Figure 4 , Figure 5 As shown, the battery tray 1 also includes a soluble second insulating element 32, which wraps around the first wire 21 and the second wire 22. The second insulating element 32 is adapted to be dissolved when in contact with the electrolyte. The first insulating element 31 and the second insulating element 32 are made of different materials.

[0049] The second insulating member 32 encloses the first wire 21 and the second wire 22. On the one hand, the second insulating member 32 protects the first wire 21 and the second wire 22 and limits their positions, preventing accidental contact that could lead to electrical connection between the first wire 21 and the second wire 22. On the other hand, the second insulating member 32 prevents the first wire 21 and the second wire 22 from directly contacting conductive components inside the receiving cavity 11, thus avoiding accidental connection and improving the accuracy of the leakage detection band 20.

[0050] Specifically, when electrolyte leakage occurs in a battery cell, the electrolyte dissolves the second insulating component 32, causing the first wire 21 and the second wire 22 to leak out. At the same time, the electrolyte electrically connects the first wire 21 and the second wire 22. At this time, the detection unit can obtain an electrical signal, thereby determining whether the battery cell in the receiving cavity 11 has leaked.

[0051] In some embodiments, the first insulating member 32 is insoluble in the electrolyte. Specifically, when a battery cell leaks, the first insulating member 32 always separates the leakage detection strip 20 and the tray 10 to prevent the first wire 21 and the second wire 22 from overlapping with the tray 10 when the electrolyte leaks and the first wire 21 and the second wire 22 are electrically connected, thereby avoiding the risk of arcing.

[0052] In some examples, the material of the first insulating element 31 is PI (polyimide), ceramic coating, PTFE (polytetrafluoroethylene), etc., so that the first insulating element 31 has good insulation properties, thereby separating the leakage detection strip 20 and the tray 10, and preventing the conductive tray 10 from directly connecting the first wire 21 and the second wire 22.

[0053] It should be noted that the first insulating element 31 can also be other materials with good insulating properties, and no further restrictions are imposed here.

[0054] In some embodiments, the material of the second insulating member 32 is PET (polyethylene terephthalate), PVP (polyvinylpyrrolidone), PEG (polyethylene glycol), etc. The second insulating member 32 can wrap the first wire 21 and the second wire 22, and under normal circumstances, it insulates and separates the first wire 21 and the second wire 22 from other conductive parts. In the event of electrolyte leakage, it is dissolved, so that the electrolyte can electrically connect the first wire 21 and the second wire 22. Thus, when the electrolyte leaks, a passage can be formed between the first wire 21 and the second wire 22, so as to determine whether the electrolyte of the battery cell has leaked based on whether the first wire 21 and the second wire 22 form a passage.

[0055] It should be explained here that different materials have different solubility characteristics for different electrolytes. Therefore, the appropriate material for the second insulating component 32 can be selected according to the specific electrolyte in the battery cell so that the second insulating component 32 can separate the first wire 21, the second wire 22 and other conductive components under normal conditions, and can dissolve the second insulating component 32 when the electrolyte leaks, so that the electrolyte can electrically connect the first wire 21 and the second wire 22.

[0056] In some embodiments of this utility model, such as Figure 1 , Figure 7 As shown, the receiving cavity 11 includes a placement area 111 for supporting the battery cell, and a leakage detection strip 20 extends around the placement area 111 so that the leakage detection strip 20 can detect leakage in the battery cell in a timely manner, thereby improving the safety of the battery cell.

[0057] It should be explained here that the leakage detection strip 20 extends around the placement area 111. It can be that the leakage detection strip 20 completely surrounds the placement area 111, or the leakage detection strip 20 partially surrounds the placement area 111. There are no further restrictions here.

[0058] Specifically, the first wire 21 and the second wire 22 both extend around the placement area 111. When the electrolyte in the battery cell leaks from any location, the electrolyte can reach the area corresponding to the leakage detection strip 20 under the action of gravity. This reduces the distance the electrolyte has to reach the leakage detection strip 20, allowing the electrolyte to quickly contact the leakage detection strip 20 and electrically connect the first wire 21 and the second wire 22, forming a connection between the first wire 21 and the second wire 22. This allows the leakage detection strip 20 to quickly detect the leakage of electrolyte in the battery cell when leakage occurs.

[0059] In some embodiments, the leakage detection band 20 is spaced apart from the individual battery cells in the placement area 111 to prevent the individual battery cells from pressing against the leakage detection band 20 and affecting its detection performance. Specifically, if the individual battery cells come into contact with the leakage detection band 20, it will affect the flow of electrolyte to the leakage detection band 20, thereby affecting the detection speed of the leakage detection band 20.

[0060] In some optional embodiments of this utility model, such as Figure 5 As shown, the bottom wall of the receiving cavity 11 defines a flow guiding surface 112. The flow guiding surface 112 extends downward at an angle away from the placement area 111. The flow guiding surface 112 is used to guide the liquid to the leakage detection zone 20 so that when the electrolyte in the battery cell leaks, the electrolyte can flow quickly along the flow guiding surface 112 to the leakage detection zone 20, so that the electrolyte can electrically connect the first wire 21 and the second wire 22, so as to detect the leakage of electrolyte in the battery cell in a timely manner.

[0061] By providing a flow guiding surface 112, when the electrolyte of a battery cell leaks in the receiving cavity 11, the flow guiding surface 112 can guide the electrolyte to flow towards the leakage detection band 20, thereby enabling the electrolyte to quickly come into contact with the leakage detection band 20, so as to improve the speed at which the leakage detection band 20 detects whether the electrolyte in the battery cell has leaked.

[0062] In some specific embodiments of this utility model, the angle between the guide surface 112 and the horizontal plane is θ, which is in the range of 5°-10°, so as to guide the electrolyte and enable the electrolyte to flow smoothly along the guide surface 112 to the leakage detection zone 20.

[0063] Specifically, if the angle θ between the guide surface 112 and the horizontal plane is too small, the liquid guiding effect of the guide surface 112 will be poor. Therefore, the angle between the guide surface 112 and the horizontal plane is greater than or equal to 5° to ensure that the guide surface 112 has a better liquid guiding effect. If the angle between the guide surface 112 and the horizontal plane is too large, it will increase the manufacturing difficulty of the tray 10 and cause the guide surface 112 to occupy too much space, affecting the layout of other components inside the tray 10. Therefore, the angle between the guide surface 112 and the horizontal plane is less than or equal to 10°.

[0064] In some embodiments, the tray 10 is an aluminum tray. By adjusting the angle in the aluminum extrusion die, the aluminum can be directly extruded to form a sloped guide surface 112, which makes it easier to reduce the molding difficulty of the tray 10.

[0065] In other embodiments, the tray 10 is a steel tray, and a sloped guide surface 112 can be rolled out on the tray 10 by a roller press.

[0066] In some embodiments, the angle between the guide surface 112 and the horizontal plane can be 5°, 6°, 7°, 8°, 9° or 10°.

[0067] In some optional embodiments of this utility model, such as Figure 7 As shown, the leakage detection strip 20 is laid on the flow guiding surface 112 so that the electrolyte leaking from the battery cell can flow smoothly to the leakage detection strip 20 under the flow guiding effect of the flow guiding surface 112.

[0068] In some examples, a first insulating element 31 is provided between the leakage detection strip 20 and the flow guiding surface 112. The first insulating element 31 is glued to the flow guiding surface 112. A second insulating element 32 wraps around the first wire 21 and the second wire 22. The second insulating element 32 is fixed to the first insulating element 31, thereby fixing the leakage detection strip 20 to the flow guiding surface 112.

[0069] In some specific embodiments of this utility model, the guide surface 112 is an annular guide surface 112 extending around the placement area 111.

[0070] The guide surface 112 extends around the placement area 111, and the leakage detection strip 20 is laid on the guide surface 112 and extends around the placement area 111. When the electrolyte in the battery cell leaks, the electrolyte flows along the guide surface 112 toward the leakage detection strip 20 and can quickly flow to the location of the leakage detection strip 20, so that the electrolyte can quickly connect the first wire 21 and the second wire 22, so as to detect the leakage of the battery cell in time.

[0071] Specifically, by utilizing the sloping guide surface 112 to collect the leaked electrolyte from the battery cells, the electrolyte electrically connects the first conductor 21 and the second conductor 22, forming a circuit between them. Simultaneously, the layered design of the first insulating component 31 and the second insulating component 32 provides sufficient electrical protection for the first conductor 21 and the second conductor 22, ensuring comprehensive monitoring of electrolyte leakage within the battery pack, high alarm timeliness, and excellent insulation performance.

[0072] In some optional embodiments of this utility model, such as Figure 2 , Figure 7 As shown, the tray 10 includes a base 101 and a base plate 102. The base plate 102 is fixed to the base 101, and the base plate 102 and the base 101 together define the receiving cavity 11.

[0073] The base 101 has an annular boss portion 1011 and a support portion 1012. The support portion 1012 is located inside the boss portion 1011. The top surface of the boss portion 1011 is higher than the support portion 1012. At least a portion of the top surface of the boss portion 1011 defines a guide surface 112. The base plate 102 is supported on the support portion 1012 and defines a placement area 111.

[0074] Specifically, the top surface of the boss portion 1011 is made higher than the support portion 1012, so that when the base plate 102 is supported on the support portion 1012, the top surface of the base plate 102 can be in contact with the top surface of the boss portion 1011, thereby allowing the electrolyte flowing onto the base plate 102 to flow smoothly onto the guide surface 112 and flow along the guide surface 112 to the leakage detection zone 20.

[0075] The boss portion 1011 defines an inclined and extended guide surface 112, and the base plate 102 defines a placement area 111, so as to facilitate the separate forming of the placement area 111 and the guide surface 112, thereby reducing the processing difficulty.

[0076] In some embodiments, the top surface of the base plate 102 is a plane to define a flat placement area 111, thereby facilitating the placement of individual battery cells in the placement area 111.

[0077] In some embodiments, the support portion 1012 is an annular support portion 1012, and the base plate 102 is supported on the support portion 1012. The top surface of the base plate 102 is in contact with the guide surface 112 so that when the electrolyte of the battery cell on the base plate 102 leaks, the electrolyte can flow smoothly through the top surface of the base plate 102 to the guide surface 112 and flow along the guide surface 112 to the leakage detection zone 20.

[0078] In some examples, the base plate 102 is fixed to the support 1012 by welding.

[0079] In some embodiments of this utility model, such as Figure 6 , Figure 7 As shown, the first wire 21 and the second wire 22 are arranged in parallel to reduce the distance between them while ensuring that the first wire 21 and the second wire 22 are not directly electrically connected. This allows the electrolyte to come into contact with the first wire 21 and the second wire 22 simultaneously when the electrolyte of the battery cell leaks in the receiving cavity 11, thus electrically connecting the first wire 21 and the second wire 22. This enables the detection unit to obtain an electrical signal, facilitating rapid detection of leakage in the battery cell.

[0080] Furthermore, by setting the first wire 21 and the second wire 22 in parallel, it is easy to reasonably distribute the positions of the first wire 21 and the second wire 22, so that the other end of the first wire 21 and the other end of the second wire 22 are not directly connected. Instead, when the electrolyte in the receiving cavity 11 leaks, the first wire 21 and the second wire 22 are electrically connected by the electrolyte when the electrolyte comes into contact with the first wire 21 and the second wire 22 respectively.

[0081] In some embodiments of the present invention, the tray 10 defines at least one receiving cavity 11, and at least one battery cell is disposed in the placement area 111.

[0082] The tray 10 may also define a plurality of separate receiving cavities 11, such as two or three receiving cavities 11. The bottom wall of each receiving cavity 11 has a placement area 111 for supporting a battery cell. At least one battery cell is placed in the placement area 111. Each receiving cavity 11 is provided with a leakage detection band 20 to detect whether the battery cell in the corresponding receiving cavity 11 has leaked.

[0083] The following describes a battery pack according to an embodiment of the present invention. The battery pack according to an embodiment of the present invention includes a battery tray 1, individual battery cells, and a detection unit according to the above-described embodiment of the present invention.

[0084] The battery cell is supported on the bottom wall of the cavity 11, and the detection unit is electrically connected to the first wire 21 and the second wire 22.

[0085] When electrolyte leakage occurs in a battery cell within the containment cavity 11, the electrolyte comes into contact with the first wire 21 and the second wire 22 within the containment cavity 11, electrically connecting the first wire 21 and the second wire 22 and forming a path in the first wire 21 and the second wire 22. The detection unit can obtain an electrical signal and determine whether electrolyte leakage has occurred in the battery cell based on whether a path has been formed between the first wire 21 and the second wire 22.

[0086] In some embodiments, the detection unit is the battery management system of the battery pack.

[0087] According to the battery pack of the present invention, by using the battery tray 1 of the above embodiment of the present invention, the leakage of electrolyte in the battery cell is detected by whether the first wire 21 and the second wire 22 form a circuit, making the detection simpler and faster, and facilitating timely detection of leakage in the battery cell.

[0088] Other configurations and operations of the battery pack according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0089] The following describes an electrical device according to an embodiment of the present invention. The electrical device according to an embodiment of the present invention includes a battery pack according to the above-described embodiment of the present invention.

[0090] The electrical devices mentioned here can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0091] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0092] In some embodiments, the electrical device is a vehicle, which may be a pure electric vehicle or a hybrid vehicle.

[0093] According to the embodiment of the present invention, the electrical device utilizes the battery pack according to the above embodiment of the present invention to detect whether the electrolyte of the battery cell is leaking by whether the first wire 21 and the second wire 22 form a circuit, making the detection simpler and faster, and facilitating timely detection of leakage of the battery cell.

[0094] Other components and operations of the electrical device according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0095] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0096] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0097] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0099] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery tray, characterized in that, include: A tray (10) having a cavity (11) defined within it for holding individual battery cells; A leakage detection strip (20) is disposed on the bottom wall of the receiving cavity (11). The leakage detection strip (20) includes a first wire (21) and a second wire (22) spaced apart. The first end of the first wire (21) and the first end of the second wire (22) are respectively adapted to be electrically connected to the detection unit. The leakage detection strip (20) is configured such that the first wire (21) and the second wire (22) can be connected by electrolyte.

2. The battery tray according to claim 1, characterized in that, A first insulating element (31) is provided between the tray (10) and the leakage detection strip (20).

3. The battery tray according to claim 2, characterized in that, It also includes a soluble second insulating element (32) that wraps around the first conductor (21) and the second conductor (22). The second insulating element (32) is adapted to be dissolved upon contact with the electrolyte. The first insulating element (31) and the second insulating element (32) are made of different materials.

4. The battery tray according to claim 1, characterized in that, The receiving cavity (11) includes a placement area (111) for supporting the battery cell, and the leakage detection strip (20) extends around the placement area (111).

5. The battery tray according to claim 4, characterized in that, The bottom wall of the receiving cavity (11) defines a flow guide surface (112) that extends downward at an angle away from the placement area (111) and is used to guide liquid to the leakage detection strip (20).

6. The battery tray according to claim 5, characterized in that, The angle between the guide surface (112) and the horizontal plane is 5°-10°.

7. The battery tray according to claim 5, characterized in that, The leakage detection strip (20) is laid on the guide surface (112).

8. The battery tray according to claim 7, characterized in that, The guide surface (112) is an annular guide surface (112) extending around the placement area (111).

9. The battery tray according to claim 5, characterized in that, The tray (10) includes a base (101) and a base plate (102), the base plate (102) being fixed to the base (101) and together defining the receiving cavity (11). The base (101) has an annular boss (1011) and a support (1012), the support (1012) being located inside the boss (1011), the top surface of the boss (1011) being higher than the support (1012), at least a portion of the top surface of the boss (1011) defining the guide surface (112), the base plate (102) being supported on the support (1012), and the base plate (102) defining the placement area (111).

10. The battery tray according to any one of claims 1-9, characterized in that, The first conductor (21) and the second conductor (22) are arranged in parallel.

11. A battery pack, characterized in that, include: A battery tray, wherein the battery tray is the battery tray according to any one of claims 1-10; A battery cell, the battery cell being supported on the bottom wall of the receiving cavity (11); The detection unit is electrically connected to the first wire (21) and the second wire (22).

12. An electrical appliance, characterized in that, Includes the battery pack as described in claim 11.

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