Water inlet detection device, battery and electric equipment

Abstract

The application relates to a water inlet detection device, a battery and an electric equipment. The water inlet detection device comprises a liquid collecting shell, a photosensitive resistor, a transparent waterproof member, a light emitting member and a water-soluble dyeing layer. The liquid collecting shell has a liquid collecting groove and a first mounting hole, the top end of the first mounting hole penetrates through the liquid collecting groove, the photosensitive resistor is mounted in the first mounting hole and is electrically connected with a BMS, so that the BMS can detect the resistance value of the photosensitive resistor, the transparent waterproof member is arranged in the first mounting hole and is located on the side of the photosensitive resistor facing the liquid collecting groove, the light emitting member is arranged on the side of the liquid collecting shell with the liquid collecting groove and is used for irradiating the photosensitive resistor through the transparent waterproof member, the light emitting member is electrically connected with the BMS, so that the BMS supplies power to the light emitting member, and the water-soluble dyeing layer is coated on the inner wall of the liquid collecting groove. Therefore, if the BMS detects that the photosensitive resistor remains consistent, it can be determined that no water inlet accident occurs; if the BMS detects that the resistance value of the photosensitive resistor changes, it can be determined that the water inlet accident has occurred, the battery water inlet accident can be detected in time and accurately, and the safety of the battery is greatly improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a water ingress detection device, a battery, and an electrical device. Background Technology

[0002] As a key component of new energy vehicles, the performance of batteries directly affects the overall performance of these vehicles. Battery safety, consistency, high and low temperature performance, lifespan, and cost are the main indicators characterizing battery performance. To ensure these performance characteristics, batteries require liquid cooling for temperature control. If leakage occurs in the liquid cooling system, it can easily lead to a short circuit in the battery, potentially causing thermal runaway or even spontaneous combustion, severely impacting battery safety.

[0003] Existing technologies utilize pressure sensors to monitor the pressure within the liquid cooling pipeline in real time, thereby determining whether leakage exists based on changes in the detected pressure. However, leakage in the liquid cooling pipeline is not the only source of water ingress into the battery pack; it could also be condensation or water entering from external sources. This makes it difficult to accurately detect water ingress into the battery, significantly reducing battery safety. Utility Model Content

[0004] Therefore, it is necessary to provide a water ingress detection device, battery, and electrical equipment that can accurately detect water ingress into the battery and improve battery safety, in order to address the above problems.

[0005] In a first aspect, this application provides a water ingress detection device, comprising:

[0006] A liquid collection shell has a liquid collection tank and a first mounting hole, the top end of the first mounting hole passing through the liquid collection tank;

[0007] A photoresistor is installed in the first mounting hole and electrically connected to the BMS so that the BMS can detect the resistance value of the photoresistor.

[0008] A transparent waterproof component is disposed in the first mounting hole and located on the side of the photoresistor facing the liquid collection tank;

[0009] A light-emitting element is disposed on the side of the liquid collection shell having the liquid collection groove, for illuminating the photoresistor through the transparent waterproof component; the light-emitting element is electrically connected to the BMS, so that the BMS supplies power to the light-emitting element; and

[0010] A water-soluble dyeing layer is applied to the inner wall of the collection tank.

[0011] In some embodiments, the liquid collection shell further has a drainage ramp arranged around the first mounting hole, the drainage ramp being arranged downwardly from the peripheral edge away from the first mounting hole to the direction close to the first mounting hole to form the liquid collection groove;

[0012] The water-soluble dye layer is coated on the drainage slope.

[0013] In some embodiments, the liquid collection shell includes a bottom plate and a plurality of side plates, each of the side plates being connected to the bottom plate and extending upward toward the bottom plate, so that each of the side plates and the bottom plate together enclose a cavity;

[0014] The first mounting hole is formed on the base plate, and the drainage slope serves as the side surface of the base plate facing the cavity.

[0015] In some embodiments, at least a portion of the side plate has a through hole, the through hole being positioned vertically above the drainage slope or flush with the peripheral edge of the drainage slope away from the first mounting hole.

[0016] In some embodiments, the water ingress detection device further includes a cover plate covering one end of each of the side plates away from the base plate, and the light-emitting element is mounted on the cover plate.

[0017] In some embodiments, a groove is provided on the side of the base plate opposite to the cavity, and the base plate slides with a slide rail through the groove.

[0018] Secondly, this application provides a battery, including a battery box, a BMS, and a water ingress detection device as described in the first aspect above;

[0019] Both the BMS and the water ingress detection device are located inside the battery box.

[0020] In some embodiments, the water ingress detection device is positioned at the lowest point within the battery compartment; and / or

[0021] The battery also includes a liquid cooling plate, a water inlet pipe, and a water outlet pipe. The liquid cooling plate has a water inlet and outlet nozzle, and the water inlet pipe and the water outlet pipe are both connected to the water inlet and outlet nozzle. The water inlet detection device is arranged below the water inlet and outlet nozzle.

[0022] In some embodiments, the water ingress detection device is configured as one or more.

[0023] Thirdly, this application provides an electrical device including the battery as described in the third aspect above.

[0024] Compared with the prior art, this application has the following beneficial effects:

[0025] In actual use, the BMS supplies power to the light-emitting element of the aforementioned water ingress detection device, battery, and electrical equipment, causing the element to emit light, which then shines through the transparent waterproof component onto the photoresistor. The BMS monitors the resistance value of the photoresistor in real time.

[0026] In the event of water ingress into the battery compartment, the water is collected in the collection tank of the collection housing. The water in the collection tank comes into contact with a water-soluble dye layer on the inner wall of the tank and becomes dyed. The dyed water flows to the transparent waterproof component at the first mounting hole, thus blocking the transparent waterproof component. This reduces the light intensity shining on the photoresistor, causing the photoresistor's resistance to increase. When the BMS detects this change in the photoresistor's resistance (i.e., the increase in resistance), it determines that a water ingress incident has occurred in the battery compartment and takes appropriate action (such as cutting off the circuit and issuing an alarm).

[0027] Thus, the water ingress detection device of this application utilizes a water-soluble dyeing layer to dye water, and then uses the dyed water to block the transparent waterproof component. This causes the resistance value of the photoresistor to change due to the reduced light intensity. The BMS determines whether a water ingress incident has occurred by detecting the resistance value of the photoresistor. If the BMS detects that the photoresistor remains constant, it can be determined that no water ingress incident has occurred; if the BMS detects a change in the resistance value of the photoresistor, it can be determined that a water ingress incident has occurred. This device can detect battery water ingress incidents in a timely and accurate manner, greatly improving battery safety. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a portion of the internal structure of a battery in one embodiment of this application;

[0029] Figure 2 for Figure 1 A schematic diagram of the water ingress detection device for the battery shown.

[0030] Figure 3 for Figure 2 The cross-sectional view of the water inlet detection device shown;

[0031] Figure 4 for Figure 2 The diagram shown is an exploded view of the water inlet detection device.

[0032] Figure 5 for Figure 2 A schematic diagram of the water ingress detection device from another perspective;

[0033] Figure 6 for Figure 2 The diagram shows the structure of the liquid collection shell of the water inlet detection device;

[0034] Figure 7 for Figure 6 The diagram shows the structure of the liquid collection shell (the transparent waterproof component and water-soluble dyeing layer are omitted). Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] One embodiment of this application provides an electrical device that uses a battery as its power source. Specifically, the electrical device can be a vehicle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, and power tool, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; 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, etc. This application embodiment does not impose any special limitations on the above-mentioned electrical device.

[0042] The specific structure of the battery is described below with reference to the accompanying drawings. Please refer to the attached diagram. Figures 1 to 3The battery includes a battery case 10, a battery management system (BMS) 20, and a water ingress detection device 30. Both the BMS 20 and the water ingress detection device 30 are housed within the battery case 10. The water ingress detection device 30 includes a collection shell 31, a photoresistor 32, a transparent waterproof component 33, a light-emitting component 34, and a water-soluble dyeing layer 35. The collection shell 31 has a collection tank 3111 and a first mounting hole 3115. The top of the first mounting hole 3115 penetrates the collection tank 3111, allowing water entering the battery case 10 to be collected into the collection shell 31 and then flow into the first mounting hole 3115. The photoresistor 32 is installed within the first mounting hole 3115 of the collection shell 31 and is electrically connected to the BMS 20 via a wiring harness, enabling the BMS 20 to detect the resistance value of the photoresistor 32. A transparent waterproof component 33 is disposed in the first mounting hole 3115 of the liquid collection shell 31 and is located on the side of the photoresistor 32 facing the liquid collection tank 3111. This allows the transparent waterproof component 33 to waterproof the photoresistor 32, preventing water flowing into the first mounting hole 3115 from contacting the photoresistor 32 and affecting its resistance value. A light-emitting component 34 is arranged on the side of the liquid collection shell 31 with the liquid collection tank 3111 and is used to illuminate the photoresistor 32 through the transparent waterproof component 33. The light-emitting component 34 is electrically connected to the BMS 20 via a wiring harness, enabling the BMS 20 to supply power to the light-emitting component 34. Driven by the power supply from the BMS 20, the light-emitting component 34 emits light and illuminates the photoresistor 32 through the transparent waterproof component 33. A water-soluble dyeing layer 35 is coated on the inner wall of the collection tank 3111. Water entering the collection tank 3111 of the collection shell 31 comes into contact with the water-soluble dyeing layer 35 and is dyed. When the dyed water flows to the first mounting hole 3115, it blocks the transparent waterproof component 33 (i.e., the light transmittance of the transparent waterproof component 33 is reduced), which reduces the light intensity irradiated onto the photoresistor 32, thereby increasing the resistance value of the photoresistor 32.

[0043] In actual use, the BMS20 supplies power to the light-emitting element 34 of the aforementioned water ingress detection device 30, causing the light-emitting element 34 to emit light, which then shines through the transparent waterproof component 33 onto the photoresistor 32. The BMS20 detects the resistance value of the photoresistor 32 in real time.

[0044] In the event of water ingress into the battery compartment 10, the water is collected in the collection tank 3111 of the collection housing 31. The water in the collection tank 3111 comes into contact with the water-soluble dye layer 35 on the inner wall of the collection tank 3111 and is dyed. The dyed water flows to the transparent waterproof component 33 at the first mounting hole 3115, thereby blocking the transparent waterproof component 33. This results in a decrease in the light intensity shining on the photoresistor 32, causing the resistance value of the photoresistor 32 to increase due to the reduced light intensity. At this time, the BMS 20 detects the change in the resistance value of the photoresistor 32 (i.e., the resistance value increases), and can determine that a water ingress accident has occurred in the battery compartment 10, and then take appropriate action (such as cutting off the circuit and issuing an alarm).

[0045] Thus, the water ingress detection device 30 of this application uses a water-soluble dyeing layer 35 to dye water, and then uses the dyed water to block the transparent waterproof component 33, causing the photoresistor 32 to change its resistance value due to the reduced light intensity. The BMS 20 determines whether a water ingress accident has occurred by detecting the resistance value of the photoresistor 32. If the BMS 20 detects that the photoresistor 32 remains constant, it can be determined that no water ingress accident has occurred; if the BMS 20 detects that the resistance value of the photoresistor 32 has changed, it can be determined that a water ingress accident has occurred. This device can detect battery water ingress accidents in a timely and accurate manner, greatly improving battery safety.

[0046] Optionally, the water-soluble dyeing layer 35 can be made of a black water-soluble dyeing material, which can dye water black, providing good opacity and thus better blocking the photoresistor 32 from receiving the light source, increasing the resistance of the photoresistor 32. Of course, in other embodiments, the water-soluble dyeing layer 35 can also use water-soluble dyeing materials of other colors, as long as it can dye water and the dyed water can block the transparent waterproof component 33, thereby reducing the light transmittance of the transparent waterproof component 33. This is not limited here.

[0047] Optionally, the light-emitting element 34 can be a light-emitting diode (LED). When the BMS20 starts supplying power, the LED begins to operate. To avoid false alarms, the resistance value of the photoresistor 32 is detected after a 1-second delay. Of course, in other embodiments, the light-emitting element 34 can also be other light-emitting devices, and no special limitation is made here.

[0048] Please see Figures 3 to 7 In this embodiment of the application, the liquid collection shell 31 further has a drainage slope 3113 arranged around the first mounting hole 3115. The drainage slope 3113 is arranged inclined downstream from the peripheral edge away from the first mounting hole 3115 to the direction close to the first mounting hole 3115 to form the aforementioned liquid collection groove 3111. The aforementioned water-soluble dyeing layer 35 is coated on the drainage slope 3113. Thus, since the drainage slope 3113 is inclined downwards from the peripheral edges to the center of the first mounting hole 3115, in the event of a water ingress accident into the battery box 10, the water can automatically flow along the drainage slope 3113 towards the first mounting hole 3115 under its own gravity. Because the drainage slope 3113 is coated with the water-soluble dyeing layer 35, the water can be dyed by the water-soluble dyeing layer 35 as it flows along the drainage slope 3113 towards the first mounting hole 3115.

[0049] Furthermore, the liquid collection shell 31 includes a base plate 311 and multiple side plates 313. Each side plate 313 is connected to the base plate 311 and extends upward toward the base plate 311, so that the side plates 313 and the base plate 311 together enclose a cavity A. The aforementioned first mounting hole 3115 is formed on the base plate 311, and the aforementioned drainage slope 3113 serves as the side surface of the base plate 311 facing the cavity A. In this way, the side plates 313 protect the water-soluble dyeing layer 35, transparent waterproof component 33, and other components on the base plate 311, preventing them from being damaged by impact, which helps to improve the service life of the water ingress detection device 30.

[0050] Furthermore, at least a portion of the side plate 313 is provided with a through hole 3131. The through hole 3131 is positioned vertically higher than the drainage slope 3113 or flush with the peripheral edge of the drainage slope 3113 away from the first mounting hole 3115. This ensures that in the event of a water ingress accident in the battery box 10, the water inside the battery box 10 can enter the liquid collection tank 3111 through the through hole 3131 on the side plate 313, and then flow along the drainage slope 3113 towards the first mounting hole 3115.

[0051] Furthermore, the water ingress detection device 30 also includes a cover plate 36. This cover plate 36 covers the end of each side plate 313 facing away from the bottom plate 311, and the aforementioned light-emitting element 34 is mounted on this cover plate 36. Specifically, the cover plate 36 has a second mounting hole 361. The light-emitting element 34 is located on the inner side of the cover plate 36 (i.e., the side of the cover plate 36 facing the bottom plate 311) and is mounted at the second mounting hole 361. The wiring harness connected to the light-emitting element 34 is led out through the second mounting hole 361 to the outer side of the cover plate 36 (i.e., the side of the cover plate 36 facing away from the bottom plate 311), and then connected to the BMS 20, thereby realizing the electrical connection between the light-emitting element 34 and the BMS 20 via the wiring harness. In this embodiment, after the light-emitting element 34 is mounted at the second mounting hole 361, it is then fixed with sealant to prevent it from falling off. Thus, the base plate 311, each side plate 313, and the cover plate 36 together enclose the cavity A, thereby protecting the water-soluble dyeing layer 35, the transparent waterproof component 33, and the light-emitting component 34 inside the cavity A. This prevents the water-soluble dyeing layer 35, the transparent waterproof component 33, and the light-emitting component 34 from being damaged by collisions during assembly or use, which helps to improve the service life of the water ingress detection device 30.

[0052] Optionally, the cover plate 36 and the side plate 313 can be fixedly connected by a snap-fit ​​connection. Of course, in other embodiments, the cover plate 36 and the side plate 313 can also be fixedly connected by bonding, welding, screw locking, etc., and no special limitation is made here.

[0053] Furthermore, a groove 3117 is provided on the side of the base plate 311 facing away from the cavity A, and a slide rail is provided inside the battery box 10. The base plate 311 slides with the slide rail through the groove 3117, thereby enabling the water ingress detection device 30 to be installed inside the battery box 10. Thus, when it is necessary to install the water ingress detection device 30, simply align the groove 3117 on the base plate 311 with the slide rail inside the battery box 10 and slide it in; when it is necessary to remove the water ingress detection device 30, push the water ingress detection device 30 along the slide rail until the slide rail is completely slid out of the groove 3117. The use of the slide rail and the groove 3117 in combination greatly simplifies the steps of installing and removing the water ingress detection device 30, reduces the difficulty of installing and removing the water ingress detection device 30, makes installation simple and operation convenient, and facilitates subsequent inspection or maintenance of the water ingress detection device 30.

[0054] Furthermore, the first mounting hole 3115 penetrates the base plate 311, and the photoresistor 32 is installed inside the first mounting hole 3115. In this embodiment, after the photoresistor 32 is installed in the first mounting hole 3115, it is then fixed with sealant to prevent it from falling off. The wiring harness connected to the photoresistor 32 is led out through the first mounting hole 3115 to the outside of the base plate 311 (i.e., the side of the base plate 311 facing away from the cover plate 36), and then connected to the BMS20, thereby realizing the electrical connection between the photoresistor 32 and the BMS20 through the wiring harness.

[0055] In some embodiments, the transparent waterproof component 33 is disposed at one end of the first mounting hole 3115 facing the liquid collection tank 3111, and the first mounting hole 3115 is sealed, so that water entering the liquid collection tank 3111 can only flow to the transparent waterproof component 33 and cannot enter the first mounting hole 3115 and reach the photoresistor 32, thereby preventing water from entering the first mounting hole 3115 and contacting the photoresistor 32 and affecting the resistance value.

[0056] Optionally, the surface of the base plate 311 facing the cavity A has a mounting plane 3119, which surrounds the first mounting hole 3115, and the aforementioned drainage slope 3113 surrounds the mounting plane 3119. The transparent waterproof component 33 is attached to the mounting plane 3119 with waterproof adhesive, thereby sealing the first mounting hole 3115.

[0057] Alternatively, the transparent waterproof component 33 may be a transparent waterproof membrane.

[0058] It should be noted that the transparent waterproof component 33 is not limited to sealing the first mounting hole 3115. In other embodiments, the transparent waterproof component 33 covers the photoresistor 32 without sealing the first mounting hole 3115, allowing water entering the collection tank 3111 to flow into the first mounting hole 3115. Since the transparent waterproof component 33 covers the photoresistor 32, it can isolate the photoresistor 32 from the water entering the first mounting hole 3115, and the water entering the first mounting hole 3115 can also block the transparent waterproof component 33.

[0059] It should be noted that the number of water ingress detection devices 30 inside the battery box 10 can be one or multiple, depending on the battery specifications and other factors, and is not limited here.

[0060] In some embodiments, the water ingress detection device 30 can be arranged at the lowest position inside the battery box 10 to ensure that water in the battery box 10 can quickly enter the collection tank 3111, thereby enabling faster detection of water ingress accidents in the battery box 10.

[0061] In a specific embodiment, the battery further includes a liquid cooling plate, a water inlet pipe, and a water outlet pipe. The liquid cooling plate has an inlet and an outlet nozzle. Both the water inlet pipe and the water outlet pipe are connected to the inlet and outlet nozzles. The coolant transported by the water inlet pipe enters the liquid cooling plate through the inlet and outlet nozzles, and the coolant in the liquid cooling plate is discharged into the drain pipe through the inlet and outlet nozzles, thereby realizing the circulation of coolant in the liquid cooling plate.

[0062] In some embodiments, the water ingress detection device 30 can be arranged below the inlet and outlet nozzles to ensure that when the inlet and outlet nozzles leak, the leaked liquid can quickly enter the collection tank 3111, thereby enabling faster detection of a water ingress accident in the battery box 10.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A water inlet detection device, characterized in that, include: The liquid collection shell (31) has a liquid collection groove (3111) and a first mounting hole (3115), the top end of the first mounting hole (3115) passing through the liquid collection groove (3111); A photoresistor (32) is installed in the first mounting hole (3115) and electrically connected to the BMS (20) so that the BMS (20) can detect the resistance value of the photoresistor (32); A transparent waterproof component (33) is disposed in the first mounting hole (3115) and located on the side of the photoresistor (32) facing the liquid collection tank (3111); A light-emitting element (34) is disposed on one side of the liquid collection shell (31) having the liquid collection groove (3111) for illuminating the photoresistor (32) through the transparent waterproof component (33); the light-emitting element (34) is electrically connected to the BMS (20) so that the BMS (20) supplies power to the light-emitting element (34); and A water-soluble dyeing layer (35) is applied to the inner wall of the collection tank (3111).

2. The water inlet detection device according to claim 1, characterized in that, The liquid collection shell (31) also has a drainage slope (3113) arranged around the first mounting hole (3115), the drainage slope (3113) being arranged downwardly from the peripheral edge away from the first mounting hole (3115) to the direction close to the first mounting hole (3115) to form the liquid collection groove (3111). The water-soluble dye layer (35) is coated on the drainage slope (3113).

3. The water inlet detection device according to claim 2, characterized in that, The liquid collection shell (31) includes a bottom plate (311) and a plurality of side plates (313). Each of the side plates (313) is connected to the bottom plate (311) and extends upward toward the bottom plate (311) so that each of the side plates (313) and the bottom plate (311) together enclose a cavity (A). The first mounting hole (3115) is formed on the base plate (311), and the drainage slope (3113) is the side surface of the base plate (311) facing the cavity (A).

4. The water inlet detection device according to claim 3, characterized in that, At least a portion of the side plate (313) has a through hole (3131), the through hole (3131) being positioned vertically higher than the drainage slope (3113) or flush with the peripheral edge of the drainage slope (3113) away from the first mounting hole (3115).

5. The water inlet detection device according to claim 3, characterized in that, The water inlet detection device (30) also includes a cover plate (36), which covers one end of each of the side plates (313) away from the bottom plate (311), and the light-emitting element (34) is mounted on the cover plate (36).

6. The water inlet detection device according to claim 3, characterized in that, The bottom plate (311) is provided with a sliding groove (3117) on the side opposite to the cavity (A), and the bottom plate (311) slides with the slide rail through the sliding groove (3117).

7. A battery, characterized in that, Includes a battery box (10), a BMS (20), and a water ingress detection device (30) as described in any one of claims 1 to 6; Both the BMS (20) and the water ingress detection device (30) are located inside the battery box (10).

8. The battery according to claim 7, characterized in that, The water ingress detection device (30) is located at the lowest position inside the battery box (10); and / or The battery also includes a liquid cooling plate, a water inlet pipe and a water outlet pipe. The liquid cooling plate has a water inlet and outlet nozzle. The water inlet pipe and the water outlet pipe are both connected to the water inlet and outlet nozzle. The water inlet detection device (30) is arranged below the water inlet and outlet nozzle.

9. The battery according to claim 7, characterized in that, The water inlet detection device (30) is configured as one or more.

10. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 7 to 9.

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