A battery device, an electric device, and an energy storage device

Abstract

This application provides a battery device, electrical equipment, and energy storage device, relating to the field of battery technology. The battery device includes a housing and a detection mechanism. The housing includes a base plate, and the detection mechanism includes a base, a detection body, and a pre-tightening member. The base is disposed within the cavity of the housing and located above the base plate. The detection body includes a connecting seat and a sensing element. The connecting seat is slidably mounted on the base along a first direction and can slide from a first position to a second position along the first direction. The sensing element is fixed on the connecting seat. When the connecting seat is in the first position, the end of the sensing element facing the base plate is spaced apart from the base plate. The pre-tightening member is connected to the base and the detection body, and maintains a force applied to the detection body towards the base plate. This application, through the flexible connection between the detection body and the base, achieves the effect of minimal damage to the sensing element caused by base plate vibration during normal battery use, and adaptive movement of the detection body when the base plate deforms.

Description

Technical Field

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

[0002] Batteries are increasingly used in daily life and industry. Although battery packs strictly adhere to waterproof requirements, with increased usage frequency and longer storage time, the waterproof seals on the casing may fail, or liquid cooling lines may leak, resulting in liquid accumulation inside the casing. Leakage sensors can detect leaks or waterproofing failures within the casing.

[0003] Existing leak sensors are bolted to the battery pack housing, which takes up a lot of space and is not easy to install.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a battery device, electrical equipment and energy storage device to solve the technical problem of liquid detection in the battery device in the prior art.

[0006] To achieve at least one of the above objectives, this application provides the following technical solution:

[0007] In a first aspect, this application provides a battery device, including a housing and a detection mechanism; the housing includes a base plate and an inner cavity for placing battery cell components; the detection mechanism includes a base, a detection body, and a pre-tightening member; the base is disposed in the inner cavity of the housing and located above the base plate; the detection body includes a connecting seat and a sensing element, the connecting seat is slidably mounted on the base along a first direction, and the connecting seat can slide from a first position to a second position along the first direction, the second position being away from the base plate relative to the first position along the first direction, the first direction being a direction parallel to or forming an acute angle with the thickness direction of the base plate; the sensing element is fixed on the connecting seat, and when the connecting seat is in the first position, the end of the sensing element facing the base plate is spaced apart from the base plate; the pre-tightening member is connected to the base and the detection body, and when the connecting seat is between the first position and the second position, the pre-tightening member maintains a force applied to the detection body towards the base plate.

[0008] In the above technical solution, the detection body is slidably assembled on the base, and the pre-tightening component applies elastic force to the connecting seat to make the connecting seat in the first position. At this time, the sensing element is close to the base plate, so that the sensing element can detect when there is liquid on the base plate.

[0009] When the base plate is deformed toward the inner cavity of the box by external force, the deformation of the base plate comes into contact with the detection body and applies pressure to the detection body. At this time, the detection body can slide away from the base plate along the first direction, reducing the risk of the detection body being damaged and failing due to the deformation of the base plate, and improving the anti-interference ability of the detection mechanism.

[0010] Compared to directly sliding the sensor onto the base, the sensor itself has relatively low strength. When the sensor is mounted on the base, it needs to be clamped and moved, increasing the failure rate. This application slides the connecting seat of the detection body onto the base, reducing direct manipulation of the sensor. The connecting seat itself has high structural stability; the sensor is fixed to the connecting seat, so the sliding assembly of the detection body has relatively little impact on the sensor.

[0011] The preload applies force to the connecting seat to bring the sensor closer to the base plate, reducing the gap between the sensor and the base plate caused by production and assembly errors between the side wall and the base plate, the base and the side wall, and the connecting seat and the base. This also reduces the need for gap adjustment between the sensor and the base plate during assembly.

[0012] There is a gap between the sensor and the base plate, which reduces the risk of sensor damage caused by relative collision between the sensor and the base plate due to vibration during battery use.

[0013] In some embodiments, the detection body further includes a circuit board, which is fixed to a connector, and a sensor is fixed to the circuit board. In the direction of the first direction toward the base plate, at least a portion of the sensor extends out of the circuit board.

[0014] In the above technical solution, the connection between the circuit board and the sensing element achieves a more uniform contact area and lower contact resistance between the probe and the circuit board. This facilitates the installation of electrical components similar to capacitors or inductors on the circuit board, enabling the detection subject to output accurate detection signals. Furthermore, the relative position of the probe and the circuit board connection is more precise, resulting in better consistency among mass-produced detection subjects.

[0015] At least part of the sensor extends out of the circuit board. After the circuit board is fixed to the connector, the distance between the sensor and the base plate is more accurate. When there is conductive liquid on the base plate, the conductive liquid contacts the sensor first, reducing the contact between the conductive liquid and the circuit board and affecting the normal use of the circuit board.

[0016] In some embodiments, a positioning pin is provided between the circuit board and the connector.

[0017] In the above technical solution, the positioning pins make the circuit board mounted on the connector more precise. By precisely controlling the connection position between the sensor and the circuit board, the accuracy of the sensor's position on the connector is improved. After the connector is installed on the base, it is easy to precisely control the position of the sensor. In particular, when the connector abuts against the base plate and the connector is in the first position, the gap between the sensor and the base plate has high precision, which protects the sensor and improves the timeliness and accuracy of detection.

[0018] In some embodiments, the detection body further includes a protective cover, which is fixedly connected to the connector and covers the circuit board.

[0019] In the above technical solution, the protective cover protects the circuit board and the connection between the circuit board and the sensor, reducing the risk of damage from impacts during circuit board assembly or later maintenance. The protective cover also reduces the adhesion or corrosion of foreign objects on the circuit board, which is beneficial for its normal use.

[0020] In some embodiments, a sliding groove is provided on the connector, and the protective cover is slidably mounted on the connector through the sliding groove. The protective cover can slide to a third position, and the protective cover in the third position covers the circuit board. A fixing buckle is also provided between the protective cover and the connector, and the protective cover in the third position is locked to the connector through the fixing buckle.

[0021] In the above technical solution, the sliding groove and fixing buckle achieve the effect of sliding assembly and snap-fit ​​fixation between the protective cover and the connecting seat, facilitating the installation of the protective cover and the stable connection with the connecting seat. The protective cover automatically locks itself once it slides into place, simplifying the assembly process of the protective cover.

[0022] In some embodiments, the end of the connector facing the base plate is provided with a receiving groove, and the end of the sensor facing the base plate is located in the receiving groove.

[0023] In the above technical solution, by placing the sensor within the receiving groove, the connecting seat protects the sensor and reduces the risk of damage from external forces. During the installation of the detection body and the connecting seat, as well as the installation of the connecting seat and the base, the sensor is less likely to be bumped or damaged, improving the ease of installation of the detection mechanism. When the base plate deforms, it applies pressure to the connecting seat, causing the connecting seat to move along the first direction, thus protecting the sensor and reducing the risk of damage.

[0024] In some embodiments, the end of the connector facing the base plate is provided with a communication port, which connects the outer peripheral space of the connector with the receiving groove. When the connector abuts against the base plate, the connector is in a first position.

[0025] In the above technical solution, the outer peripheral space of the connector and the receiving tank are connected by a connecting port. When the connector abuts against the base plate, the liquid in the outer peripheral space of the connector can enter the receiving tank through the connecting port, so that the liquid can come into contact with the sensing element and meet the needs of the detection subject.

[0026] When the connecting seat abuts against the base plate, the connecting seat is in the first position. The distance between the base plate and the sensor is equal to the distance between the end face of the connecting seat facing the base plate and the sensor. Since the distance between the end face of the connecting seat facing the base plate and the sensor is easily controlled, the distance between the sensor and the base plate can also be accurately controlled. During installation, the detection mechanism requires minimal positional adjustments; it can be directly installed, and the pre-tightening component will press the connecting seat into the first position, enabling rapid control of the distance between the sensor and the base plate. Liquid on the base plate can promptly contact the sensor, allowing for early detection of the detected object and improving the timeliness of the detection.

[0027] In some embodiments, a limiting groove is provided on the base along a first direction, and the detection body includes a limiting member fixedly connected to the connecting seat. When the connecting seat slides from the first position to the second position, the limiting member is in the limiting groove.

[0028] In the above technical solution, the sliding member within the placement groove allows the connecting seat to slide and assemble on the base along the first direction. The limiting member within the limiting groove allows the connecting seat to slide between the first and second positions, reducing the likelihood of the connecting seat detaching from the base. During installation, after connecting the connecting seat, pre-tightening member, and base, the connecting seat is positioned on the base because the limiting member is within the limiting groove. At this point, the detection mechanism functions as a single unit, facilitating the installation of the detection mechanism and the base, and shortening the overall assembly cycle of the battery device.

[0029] In some embodiments, the end of the limiting groove facing the base plate is the first end, and the detection body is located in the first position when the limiting member abuts against the first end.

[0030] In the above technical solution, by setting the limiting member to abut against the first end, the minimum distance between the control connecting seat and the base plate along the first direction is achieved, reducing the situation where the sensor directly abuts against the base plate and the sensor is easily damaged.

[0031] In some embodiments, the limiting member includes a free end that protrudes from the connecting seat along a third direction and is located in the limiting groove. The third direction is the direction from the bottom of the groove to the opening of the groove. When the limiting member is subjected to external force, it can undergo elastic deformation, causing the free end to move toward the connecting seat along the third direction.

[0032] In the above technical solution, by placing a slot through one end of the base, the free end of the limiting member can deform and move. After the free end deforms, the detection body is slid directly away from the base plate until the connecting seat is in the first position. Then, the force on the free end is removed, and the free end returns to its original shape and enters the limiting slot. The pressure applied by the pre-tightening member to the connecting seat keeps the connecting seat stable in the first position, thus realizing the sliding assembly of the connecting seat and the base, which has the effect of quick installation between the connecting seat and the base.

[0033] In some embodiments, the free end includes a stop surface and a guide surface, which are the two end surfaces of the free end along a first direction.

[0034] In the above technical solution, by setting the anti-reverse surface and the guide surface, when assembling the connecting seat and the base, it is only necessary to drive the connecting seat to move away from the base plate along the first direction. After the guide surface contacts the base, it is pressed and deforms the free end. After the free end moves to the limiting groove, the free end restores its deformation and enters the limiting groove. The anti-reverse surface abuts against the first end to keep the free end in the limiting groove. The setting of the guide surface further facilitates the installation of the connecting seat, and the installation operation of the connecting seat is simple and convenient. Tool-free installation of the connecting seat is achieved, which can be achieved by sliding it into place, further simplifying the assembly process of the detection body.

[0035] In some embodiments, the length of the sensor is set along a first direction, one end of the sensor away from the base plate is fixedly connected to the connecting seat, and the other end is spaced apart from the base plate.

[0036] In the above technical solution, by setting the length of the sensing element along the first direction, when the sensing element is pressed by the base plate, the sensing element can transmit the force of the base plate to the connecting seat, and the connecting seat moves along the first direction, thereby reducing the pressure of the base plate on the sensing element and reducing the damage to the sensing element caused by the pressure of the base plate.

[0037] In some embodiments, the pretensioner includes a compression spring, one end of which abuts against the detection body and the other end against the base.

[0038] In the above technical solution, the pre-tensioning member presses the connecting seat against the base by means of a compression spring abutting against the connecting seat and the base, thus achieving the effect of pressing the connecting seat against the base in the first position. When the base plate deforms and squeezes the detection body, the connecting seat can move towards the second position or move to the second position, and the pre-tensioning member continues to apply pressure to the connecting seat, maintaining the stability of the connecting seat on the base.

[0039] In some embodiments, the base has a placement groove arranged in a first direction, the placement groove including a second end away from the base plate; the detection body includes a slider fixed on the connecting seat, the slider sliding in the placement groove in the first direction; the compression spring is located in the placement groove, one end of the compression spring facing the base plate abuts against the slider, and the other end abuts against the second end.

[0040] In the above technical solution, by placing the compression spring in the placement groove, the effect of facilitating the installation of the compression spring is achieved, and the deformation of the compression spring along the radial direction is reduced, so as to maintain the compression spring applying stable pressure to the connecting seat.

[0041] In some embodiments, the base includes two spaced-apart guides; the placement slot includes a first slot and a second slot, the first slot and the second slot being respectively disposed on opposite sides of the two guides, the first slot and the second slot being disposed along a first direction; the connecting seat is located between the two guides, and two sliding members are fixed on the connecting seat, the two sliding members being respectively disposed in the first slot and the second slot.

[0042] In the above technical solution, the stability of the connecting seat sliding is improved by slidably assembling two sliding parts in the first and second slots respectively, and the guide parts located on both sides of the connecting seat have the effect of protecting the detection body.

[0043] In some embodiments, the sensing element includes a first probe and a second probe. When the first probe and the second probe are in contact with the conductive liquid, the first probe and the second probe and the conductive liquid can form a conductive circuit. The detection body also includes a resistor, the two ends of which are electrically connected to the first probe and the second probe respectively, and the resistor and the conductive liquid are connected in parallel between the first probe and the second probe.

[0044] In the above technical solution, by electrically connecting the resistor to the first and second probes, a circuit is formed between the first probe, the resistor, and the second probe when there is no conductive liquid between them. Current flows through the circuit, indicating that the first probe, the second probe, and the circuit itself are fault-free. When there is conductive liquid between the first and second probes, the conductive liquid can be considered an equivalent resistance, connected in parallel with the resistor. With a constant voltage between the first and second probes, the current in the circuit increases. By rationally configuring the resistance of the detection circuit, real-time monitoring of the target liquid can be achieved, while simultaneously detecting circuit faults, effectively improving the reliability and accuracy of liquid detection.

[0045] In some embodiments, the housing includes sidewalls, and the base is detachably fixed to the sidewalls.

[0046] In the above technical solution, the detachable connection between the base and the side wall facilitates the installation and connection of the testing mechanism on the side wall. The testing mechanism can be pre-assembled into independent modular components, eliminating the need for precise height adjustment during on-site installation. Installation is completed simply by fixing the base to the side wall, reducing installation difficulty and improving the assembly efficiency of the battery device.

[0047] In some embodiments, a connecting hole is provided on the side wall, the connecting hole including a first hole and a second hole, the specifications of the first hole and the second hole are different; a connecting part is fixed on the base, the connecting part including a first protrusion and a second protrusion, the specifications of the first protrusion correspond to the specifications of the first hole and the first protrusion passes through the first hole, the specifications of the second protrusion correspond to the specifications of the second hole and the second protrusion passes through the second hole.

[0048] In the above technical solution, by setting the first protrusion to cooperate with the first hole and the second protrusion to cooperate with the second hole, the situation of the base being installed backwards, causing the sensor to be far away from the base plate, is reduced, thus achieving the effect of preventing installation errors.

[0049] Secondly, embodiments of this application also provide an electrical device, including the aforementioned battery device, which is used to store or provide electrical energy.

[0050] The above technical solution improves the liquid detection process to reduce the problem of damage to the liquid detection mechanism when the base plate of the electrical equipment deforms.

[0051] Thirdly, embodiments of this application also provide an energy storage device, including the aforementioned battery device, which is used to store or provide electrical energy.

[0052] The above technical solution improves the liquid detection process to reduce the problem of damage to the liquid detection mechanism when the base plate of the energy storage device deforms. Attached Figure Description

[0053] 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 of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the structure of a vehicle provided according to some embodiments of this application;

[0055] Figure 2 This is an exploded structural diagram of a battery device according to some embodiments of this application;

[0056] Figure 3 This is a top view of the bottom plate and side walls in one embodiment;

[0057] Figure 4 yes Figure 3 A schematic diagram of a partial section along the AA direction;

[0058] Figure 5This is a schematic diagram of the detection mechanism and the sidewall guide portion in one embodiment;

[0059] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0060] Figure 7 This is a schematic diagram of a detection body slidingly assembled on a base in one embodiment;

[0061] Figure 8 This is an isometric structural diagram of the detection mechanism in one embodiment;

[0062] Figure 9 This is a schematic diagram of the exploded structure of the detection body and the base along a first direction in one embodiment;

[0063] Figure 10 yes Figure 7 A schematic diagram of the cross-sectional structure along the CC direction;

[0064] Figure 11 This is a schematic diagram of the structure of a limiting member on the detection body in one embodiment;

[0065] Figure 12 This is a schematic diagram of a circuit board with resistors and sensors connected in one embodiment;

[0066] Figure 13 This is an exploded structural diagram of the protective cover and the connecting seat in one embodiment;

[0067] Figure 14 yes Figure 7 A schematic diagram of the cross-sectional structure along the DD direction.

[0068] The attached figures are labeled as follows:

[0069] 1000, Vehicle; 100, Battery unit; 110, Battery cell assembly; 200, Controller; 300, Motor;

[0070] 1. Box body; 11. First box body; 12. Second box body; 13. Bottom plate; 14. Side wall; 141. Connecting hole;

[0071] 2. Base; 21. Placement slot; 211. First slot; 212. Second slot; 213. Second end; 22. Limiting slot; 221. First end; 23. Guide part; 24. Connecting part;

[0072] 3. Detection body; 31. Connecting seat; 311. Slide groove; 312. Receiving groove; 313. Support surface; 314. Limiting buckle; 315. Positioning pin; 316. Connecting port; 32. Sensing element; 321. First probe; 322. Second probe; 33. Sliding element; 34. Limiting element; 341. Free end; 3411. Anti-reverse surface; 3412. Inlet surface; 35. Resistor; 36. Circuit board; 37. Protective cover; 38. Fixing buckle; 4. Pre-tightening element; 5. Sampling harness. Detailed Implementation

[0073] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0074] The term "embodiment" as used in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0075] The specific term "exemplary" used in this application means "serving as an example, embodiment, or illustration." Any embodiment illustrated as "exemplary" is not necessarily to be construed as superior or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0076] In the description of this application, the technical terms "first", "second", "third", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0077] In the description of this application, the technical term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0078] In the description of this application, the technical terms "upper", "lower", "inner", "outer", "front", "back", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application. They 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. Therefore, they should not be construed as limitations on this application.

[0079] In the description of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "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 based on the specific circumstances.

[0080] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0081] The terms "parallel" and "perpendicular" used in this application can mean not only perfectly parallel and perpendicular, but also have a certain margin of error; for example, if the angle between the two is greater than or equal to 0° and less than or equal to 5°, they are considered to be parallel; if the angle between the two is greater than or equal to 85° and less than or equal to 95°, they are considered to be perpendicular.

[0082] In the description of this application, "multiple" means two or more (including two), unless otherwise expressly and specifically defined.

[0083] In the description of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, and other dimensions of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0084] As part of the inventive concept of this application, before describing the embodiments of this application, it is necessary to analyze the problem of liquid detection in battery devices in related technologies, and obtain the technical solution of the embodiments of this application through reasonable analysis.

[0085] In related technologies, liquid detection devices are fixed to the housing with bolts. On the one hand, the space inside the housing is limited, making the operation of tightening the bolts inconvenient. On the other hand, the liquid accumulated inside the housing is located above the bottom plate, and the probe of the liquid detection device should be close to the bottom plate so that when there is liquid accumulation on the bottom plate, the liquid can come into contact with the probe in time to form a conductive circuit through the probe. Therefore, the liquid detection device needs to be as close to the bottom plate as possible. However, when the probe comes into contact with the bottom plate, the bottom plate will vibrate to a certain extent during normal battery use. After the vibration of the bottom plate is transmitted to the probe, the probe is easily damaged. When the bottom plate is subjected to external impact, the bottom plate will deform. The deformed bottom plate may come into contact with the probe of the detection device, which also increases the risk of damaging the probe.

[0086] This application provides a battery device, including a housing and a detection mechanism. The housing includes a base plate and an inner cavity for placing individual battery cells. The detection mechanism includes a base, a detection body, and a pre-tightening member. The base is disposed in the inner cavity of the housing and located above the base plate. The detection body includes a connecting seat and a sensing element. The connecting seat is slidably mounted on the base along a first direction and can slide from a first position to a second position along the first direction. The second position is relative to the first position and is away from the base plate along the first direction. The first direction is parallel to or forms an acute angle with the thickness direction of the base plate. The sensing element is fixed on the connecting seat. When the connecting seat is in the first position, the end of the sensing element facing the base plate is spaced apart from the base plate. The pre-tightening member is connected to the base and the detection body. When the connecting seat is between the first position and the second position, the pre-tightening member maintains a force applied to the detection body towards the base plate.

[0087] This application achieves a flexible connection between the detection body and the base by sliding the detection body onto the base fixed to the side wall and applying elastic force to the detection body with a pre-tightening component. During installation and normal use, the connecting seat is in the first position, and the sensing element is adjacent to the base plate. When the conductive liquid on the base plate comes into contact with the sensing element, the sensing element and the conductive liquid form a conductive circuit, and the detection body can detect the liquid accumulated on the base plate. At this time, the gap between the sensing element and the base plate can be minimized so that when a small amount of conductive liquid accumulates on the base plate, the sensing element can detect the presence of the liquid, and the vibration on the base plate is reduced from being transmitted to the sensing element.

[0088] When the base plate is subjected to external force or impact from debris, and deforms towards the inner cavity of the box, the deformed base plate can contact the sensing element or the connecting seat when it comes into contact with the detection body. The deformed base plate will squeeze the detection body, causing the detection body to move towards the second position along the first direction or to the second position, thereby reducing the risk of damage to the detection body caused by rigid contact between the base plate and the detection body.

[0089] There is a gap between the sensor and the base plate, which reduces the risk of sensor damage caused by relative collision between the sensor and the base plate due to vibration during battery use.

[0090] The technical solutions provided in this application are applicable to electrical equipment that uses battery devices as a power source and energy storage devices that use battery devices as energy storage elements. Electrical equipment can be vehicles, ships, spacecraft, etc. Energy storage devices can be energy storage containers, energy storage cabinets, etc.

[0091] For ease of description, this application uses the application of a battery device in a vehicle as an example for illustration.

[0092] refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0093] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0094] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device according to some embodiments of this application. The battery device includes a housing and a battery cell assembly 110. The housing has a receiving cavity, and the battery cell assembly 110 is received within the receiving cavity of the housing.

[0095] In some embodiments, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0096] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0097] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells arranged and fixed together to form an independent module.

[0098] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0099] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0100] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0101] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0102] As an example, such as Figure 2 As shown, the housing 1 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 1 to house the battery cell assembly 110. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0103] As an example, the housing 1 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 1 forms an enclosed space to accommodate the battery cell assembly.

[0104] In some embodiments, the housing 1 may be part of the vehicle's chassis structure. For example, a portion of the housing 1 may be at least a portion of the vehicle's floor, or a portion of the housing 1 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0105] In some embodiments, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0106] As an example, the battery cell 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 in this regard.

[0107] As an example, the battery cell can be a prismatic battery cell or a battery cell with other shapes having a large surface area. Prismatic battery cells include square-shell battery cells with a large surface area, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. The embodiments of this application are not limited in this respect.

[0108] Therefore, this application provides a battery device, referring to Figure 3 It includes a housing 1 and a testing mechanism. The housing 1 includes a base plate 13 and an inner cavity for placing battery cell assemblies.

[0109] Specifically, the base plate 13 is the bottom wall panel of the housing 1, and the battery inside the housing 1 is located above the base plate 13. When liquid accumulates inside the housing 1, the liquid will accumulate above the base plate 13. The base plate 13 is set horizontally, but it can also be tilted at a small angle. Here, the tilt angle of the base plate 13 is considered to be horizontal if it is less than 10°.

[0110] The position of the base plate 13 corresponding to the detection mechanism in the vertical direction is the position on the base plate 13 where liquid is likely to accumulate. It can also be understood that the position on the base plate 13 corresponding to the detection mechanism in the vertical direction should be the lowest point on the inner side of the base plate 13 as much as possible, so that when liquid accumulates on the base plate 13, the liquid will concentrate at this position and the detection mechanism can detect the presence of liquid in time.

[0111] The enclosure 1 also includes a side wall 14 and a top cover. The side wall 14 is located between the bottom plate 13 and the top cover, and the side wall 14 is fixedly connected to the bottom plate 13. The side wall 14 includes not only the outer peripheral wall that forms the inner cavity of the enclosure 1, but also other structures located in the inner cavity of the enclosure 1, such as reinforcing beams, crossbeams, longitudinal beams or other structural components.

[0112] Reference Figure 5 The detection mechanism is used to detect liquids. When the detection mechanism detects liquids, it will emit a corresponding detection signal. The detection mechanism includes a base 2, which is disposed inside the cavity of the housing 1 and located above the base plate 13. The base 2 is fixed to the side wall 14 of the housing 1. The connection between the base 2 and the housing 1 can be a non-detachable fixed connection or a detachable fixed connection. The following description of this application will use a detachable fixed connection as an example.

[0113] Reference Figure 5 as well as Figure 7The testing mechanism also includes a testing body 3, which includes a connecting seat 31 and a sensing element 32. The connecting seat 31 is slidably mounted on the base 2 along a first direction. The connecting seat 31 can slide from a first position to a second position along the first direction. The second position is away from the base plate 13 along the first direction relative to the first position. The first direction is a direction that is parallel to or has an acute angle with the thickness direction of the base plate. The sensing element 32 is fixed to the connecting seat 31 and is positioned facing the base plate 13.

[0114] In this embodiment, the sensor 32 is described using a liquid probe as an example. In another embodiment, the sensor 32 can also be other types of sensors, such as a temperature sensor, pressure sensor, vibration sensor, or humidity sensor.

[0115] For ease of explanation, a first direction, a second direction, and a third direction are defined. The first direction is parallel to or at an acute angle to the thickness direction of the base plate, and it is also the sliding direction of the connecting seat 31 on the base 2. In this embodiment, the first direction being parallel to the thickness direction of the base plate is used as an example. The second direction is the spacing direction between the two guide portions 23 on the base 2, and the third direction is the direction from the bottom of the upper limit groove 22 of the base 2 towards the groove opening. In the accompanying drawings, the first direction is represented by the X direction, the second direction by the Y direction, and the third direction by the Z direction. In one embodiment, the first direction is the length direction of the base 2, the second direction is the width direction of the base 2, and the third direction is the thickness direction of the base 2. In another embodiment, the first direction is a vertical direction, the second direction is a horizontal direction, and the third direction is a horizontal direction perpendicular to the second direction.

[0116] For example, the connecting seat 31 is slidably mounted on the base 2 along the first direction, and the connecting seat 31 can slide from the first position to the second position along the first direction, with the second position being away from the base plate 13 relative to the first position along the first direction.

[0117] Specifically, when the connecting seat 31 is slidably mounted on the base 2, the connecting seat 31 can slide along the first direction. In this embodiment, the connecting seat 31 can only slide along the first direction. In another embodiment, the connecting seat 31 can also rotate while sliding along the first direction.

[0118] The connecting seat 31 slides on the base 2 along a first direction. The connecting seat 31 can only slide between a first position and a second position, where the first position and the second position are included. It is only necessary for the connecting seat 31 to slide from the first position to the second position, but it is not necessary for the connecting seat 31 to slide from the second position to the first position. In this embodiment, the connecting seat 31 can reciprocate between the first position and the second position.

[0119] Since the detection body 3 includes a connecting seat 31 and other components connected to the connecting seat 31, the sliding of the connecting seat 31 along the first direction can be understood as the sliding of the detection body 3 along the first direction.

[0120] The first direction is the direction from the first position to the second position. The first direction can also be understood as the direction from the base plate 13 to the base 2. When the connecting seat 31 is in the first position, it is the position of the connecting seat 31 closest to the base plate 13 along the first direction. When the connecting seat 31 slides from the first position to the second position, the connecting seat 31 gradually moves away from the base plate 13. This can be understood as the detection body 3 moving away from the base plate 13 as a whole.

[0121] The sensor 32 is fixed to the connector 31. The sensor 32 can be directly or indirectly fixed to the connector 31. The sensor 32 is used to detect whether liquid has accumulated on the base plate 13. In this embodiment, the sensor 32 is a conductive contact probe, which includes two or more insulated metal needles. The conductive contact probe uses electrolyte or other liquids as conductors. If the battery leaks electrolyte, and electrolyte accumulates on the base plate 13 of the housing 1, when the liquid level rises and contacts the tip of the sensor 32, a path is formed between the two sensors 32 through the electrolyte, the resistance 35 decreases, or a microcurrent is generated, thereby outputting a leakage signal.

[0122] When the connecting seat 31 is in the first position, the end of the sensing element 32 facing the base plate 13 is spaced apart from the base plate 13. When the connecting seat 31 is in the first position closest to the base plate 13, there is still a gap between the sensing element 32 fixed on the connecting seat 31 and the base plate 13. This gap should be as small as possible while meeting the assembly requirements so that the liquid on the base plate 13 can contact the sensing element 32 in time. Specifically, the gap between the sensing element 32 and the base plate 13 can be 0.5mm, 1mm, 2mm or other gaps.

[0123] The pre-tightening member 4 is connected to the base 2 and the detection body 3. When the connecting seat 31 is between the first position and the second position, the pre-tightening member 4 maintains the force applied to the detection body 3 toward the base plate 13.

[0124] Specifically, the pretensioner 4 can be a compression spring, tension spring, torsion spring, elastic sheet, or other component capable of elastic deformation. The pretensioner 4 can also be an existing structure capable of buffering, such as an air-cushioned cylinder. In this embodiment, the following description will use a compression spring as an example for the pretensioner 4. The connecting seat 31 is connected to the base 2 and the detection body 31. The connecting seat 31 can directly contact and abut against the base 2 and the detection body 3, or it can abut against other features fixed on the base 2 and the detection body 3.

[0125] In another embodiment, the pretensioner 4 may include a first magnetic element fixed on the base 2 and a second magnetic element fixed on the connecting seat 31. The first magnetic element and the second magnetic element are detected and disposed along a first direction, and the first magnetic element and the second magnetic element repel each other along the first direction.

[0126] In this embodiment, the force exerted by the pretensioner 4 on the connecting seat 31 and the base 2 is along the first direction. In another embodiment, the force exerted by the pretensioner 4 on the connecting seat 31 and the base 2 may be inclined relative to the first direction, with an acute angle of inclination.

[0127] The pre-tightening member 4 always maintains contact with the detection body 3 that is slidably mounted on the base 2. When the connecting seat 31 is in the first position, the pre-tightening member 4 presses against the connecting seat 31, and the pressing direction is towards the base plate 13. During the process of the connecting seat 31 moving from the first position to the second position and when it moves to the second position, the pre-tightening member 4 presses against the connecting seat 31, and the pressing direction is towards the base plate 13.

[0128] The pre-tightening member 4 presses against the connecting seat 31, which can press the connecting seat 31 into the first position, reduce the sliding of the detection body 3 along the first direction during the use of the battery device, maintain the stable distance between the sensing element 32 and the base plate 13, and thus improve the accuracy of the detection mechanism.

[0129] When the base plate 13 deforms toward the inner cavity of the housing 1, the deformed base plate 13 abuts against the detection body 3, which may be against the connecting seat 31 or against the sensing element 32. The deformed base plate 13 can exert a force on the detection body 3 in the first direction, causing the connecting seat 31 to move toward the second position in the first direction, so that the connecting seat 31 can move closer to the second position or move to the second position.

[0130] The flexible connection between the detection body 3 and the base 2 can reduce the risk of deformation of the base plate 13 damaging the detection body 3 and causing the detection body 3 to malfunction, and improve the detection mechanism's ability to resist external interference.

[0131] Compared to directly sliding the sensor 32 onto the base 2, the sensor 32 itself has relatively low strength. When the sensor 32 is mounted on the base 2, it needs to be clamped and moved, which increases the failure rate of the sensor 32 itself. In this application, the connecting seat 31 of the detection body 3 is slidably mounted onto the base 2, reducing direct operation on the sensor 32. The connecting seat 31 itself has high structural stability, and the sensor 32 is fixed on the connecting seat 31. The sliding assembly of the detection body 3 has a relatively small impact on the sensor 32.

[0132] The pre-tightening component 4 applies a force to the connecting seat 31 to bring the sensor 32 close to the base plate 13, which reduces the gap between the sensor 32 and the base plate 13 caused by production and assembly errors between the side wall 14 and the base plate 13, the base 2 and the side wall 14, and the connecting seat 31 and the base 2, and reduces the need for gap adjustment between the sensor 32 and the base plate 13 during assembly.

[0133] There is a gap between the sensor 32 and the base plate 13 to reduce the risk of damage to the sensor 32 caused by relative collision between the sensor 32 and the base plate 13 due to vibration during the use of the battery device.

[0134] Reference Figure 7 As an alternative, the first direction is the thickness direction of the base plate 13, and the connecting seat 31 is slidably mounted on the base 2 along the first direction. The first direction is perpendicular to the inner side of the base plate 13. In this case, local protrusions or depressions on the inner side of the base plate 13 are not considered, and only the overall situation of the base plate 13 is considered.

[0135] In another embodiment, the angle between the first direction and the thickness direction of the base plate 13 is no greater than 45°. In another embodiment, the angle between the first direction and the thickness direction of the base plate 13 is no greater than 60°.

[0136] By mounting the connecting seat 31 vertically onto the base 2, when the base plate 13 deforms, the base plate 13 presses against the connecting seat 31, causing the connecting seat 31 to move vertically. This reduces the vertical force exerted by the base plate 13 on the tilted connecting seat 31, and also reduces the likelihood of the detection body 3 sliding in the first direction due to the excessive tilt angle of the connecting seat 31.

[0137] Reference Figure 4 as well as Figure 5 As an alternative, the housing 1 includes a side wall 14, and the base 2 is detachably fixed to the side wall 14.

[0138] For example, the base 2 and the side wall 14 are fixedly connected by a snap-fit. In another embodiment, the base 2 and the side wall 14 are fixedly connected by bolts and nuts.

[0139] With the detachable connection between the base 2 and the side wall 14, the testing mechanism can be pre-assembled into independent modular components. During on-site installation, precise height adjustment is not required; the base 2 can be directly fixed to the side wall 14 to complete the installation, reducing the installation difficulty and improving the assembly efficiency of the battery device.

[0140] Reference Figure 4 as well as Figure 5As an optional solution, a connection hole 141 is provided on the side wall 14. The connection hole 141 includes a first hole and a second hole. The specifications of the first protrusion correspond to the specifications of the first hole, and the first protrusion passes through the first hole. The specifications of the second protrusion correspond to the specifications of the second hole, and the second protrusion passes through the second hole.

[0141] A connecting part 24 is fixed on the base 2. The connecting part 24 includes a first protrusion and a second protrusion. The first protrusion passes through the first hole, and the second protrusion passes through the second hole.

[0142] For example, the length of the first hole along the first direction is greater than the length of the second hole along the second direction, and the length of the first protrusion is greater than the length of the second protrusion.

[0143] When the first protrusion corresponds to the first hole and the second protrusion corresponds to the second hole, the first protrusion and the second protrusion can pass through the connecting hole 141. When the first protrusion corresponds to the second hole and the second protrusion corresponds to the first hole, the first protrusion and the second protrusion cannot pass through the connecting hole 141.

[0144] The connecting part 24 also includes an aircraft-shaped buckle, which is disposed between the first protrusion and the second protrusion. The first hole and the second hole are spaced apart along a first direction. The connecting hole 141 also includes a third hole, which is disposed between the first hole and the second hole, which are spaced apart along the first direction. The aircraft-shaped buckle passes through the third hole to achieve a snap-fit ​​fixation between the connecting part and the side wall 14.

[0145] By aligning the first protrusion with the first hole and the second protrusion with the second hole, the occurrence of the base 2 being installed backwards and the sensor 32 being far away from the base plate 13 is reduced, thus achieving the effect of preventing installation errors.

[0146] Reference Figure 6 as well as Figure 9 As an optional solution, the base 2 is provided with a limiting groove 22 that is set along the first direction.

[0147] The detection body 3 includes a limiting member 34 that is fixedly connected to the connecting seat 31. When the connecting seat 31 slides from the first position to the second position, the limiting member 34 is in the limiting groove 22.

[0148] For example, the limiting groove 22 is a long groove with its length set along the first direction. The limiting member 34 on the detection body 3 is located in the limiting groove 22. The limiting member 34 slides in the limiting groove 22 along the first direction. The sliding of the limiting member 34 along the first direction is restricted by the two ends of the limiting groove 22 along the first direction. The connecting seat 31 can only slide in the set area on the base 2 along the first direction.

[0149] Furthermore, the placement groove 21 is a long groove with its length set along the first direction, and the slider 33 on the detection body 3 is located in the placement groove 21, and the slider 33 slides in the placement groove 21 along the first direction.

[0150] In another embodiment, a sliding member is fixed on the base 2, and a sliding groove is formed on the connecting seat 31, with the sliding member located within the sliding groove, thus enabling the connecting seat 31 to be slidably assembled onto the base 2. A limiting groove is formed on the connecting seat 31, and a limiting member is fixed on the base 2, with the limiting member located within the limiting groove.

[0151] In another embodiment, the limiting groove 22 and the sliding groove can be the same groove, which does not penetrate the base 2 at either end along the first direction. This groove enables the connecting seat 31 to be slidably assembled on the base 2.

[0152] By sliding the slider 33 within the placement groove 21 and the limiting member 34 within the limiting groove 22, the connecting seat 31 is slidably assembled onto the base 2 and slides within the designated area along the first direction. The sliding of the connecting seat 31, rather than the sliding of the sensing element 32, reduces damage caused by the assembly of the sensing element 32 and frequent contact between the sensing element 32 and the base 2 during battery device vibration, thus improving the reliability of the detection mechanism itself.

[0153] Reference Figure 10 as well as Figure 11 As an optional solution, the placement groove 21 extends through the end of the base 2 facing the base plate 13. The limiting member 34 includes a free end 341, which protrudes from the connecting seat 31 along a third direction and is located in the limiting groove 22. The third direction is the direction from the bottom of the limiting groove 22 to the opening of the groove. The limiting member 34 can undergo elastic deformation under external force, causing the free end 341 to move towards the connecting seat 31 along the third direction.

[0154] Specifically, the placement groove 21 extends through the end of the base 2 facing the base plate 13. In this embodiment, the placement groove 21 does not extend through the end of the base 2 away from the base plate 13. In another embodiment, the placement groove 21 may extend through the end of the base plate 13 away from the base plate 13.

[0155] The limiting member 34 includes a fixed end and a free end 341. The fixed end is fixed to the side of the limiting member 34 facing the base 2 (not shown in the drawings). The limiting member 34 is capable of elastic deformation. When the free end 341 of the limiting member 34 is subjected to a force toward the connecting seat 31, it can also elastically deform, causing the free end 341 to move toward the connecting seat 31. The connecting seat 31 has a notch, allowing the elastically deformed free end 341 to enter the notch, making the surface of the connecting seat 31 facing the base 2 flat. For example, the limiting member 34 can be a polyethylene block capable of elastic deformation.

[0156] The sliding member 33 can slide directly into the placement groove 21 from the end facing the base plate 13, facilitating the sliding assembly of the connecting seat 31 and the base 2. Then, by applying a force to the free end 341, it undergoes elastic deformation along a third direction towards the connecting seat 31, allowing the sliding member 33 to smoothly enter the placement groove 21. When the limiting member 34 aligns with the limiting groove 22 along a third direction, the force applied to the limiting member 34 is removed, and the limiting member 34 returns to its original deformation, allowing the free end 341 of the limiting member 34 to enter the limiting groove 22. The sliding connection between the connecting seat 31 and the base 2 is convenient and facilitates the installation of the connecting seat 31.

[0157] Reference Figure 11 As an optional solution, the free end 341 includes a stop surface 3411 and a guide surface 3412, which are the two end surfaces of the free end 341 along the first direction.

[0158] Specifically, the guide surface 3412 is used to guide the free end 341 into the limiting groove 22. When the guide surface 3412 contacts the base 2, the force exerted by the base 2 on the guide surface 3412 causes the free end 341 to deform toward the connecting seat 31. When the anti-reverse surface 3411 contacts the base 2, the force exerted by the base 2 on the anti-reverse surface 3411 causes the free end 341 to deform away from the connecting seat 31. At this time, since the free end 341 cannot produce this deformation, the free end 341 hinders the connecting seat from continuing to move.

[0159] For example, the angle between the anti-retraction surface 3411 and the first direction is a right angle or an acute angle, and the angle between the guide surface 3412 and the first direction is an acute angle.

[0160] The angle between the anti-reverse surface 3411 and the first direction is a right angle, indicated by angle B in the attached drawing. The angle between the guide surface 3412 and the first direction is 45°, indicated by angle A in the attached drawing. To facilitate the differentiation of the free end 341, an array of dots is used to illustrate the free end 341 in the attached drawing.

[0161] When the connecting seat 31 is installed with the base 2 in the direction away from the base plate 13, the connecting seat 31 moves in the first direction. After the guide surface 3412 contacts the base 2, the guide surface 3412 is subjected to the pressure component of the base 2, causing the free end 341 to deform in the third direction toward the connecting seat 31. The free end 341 moves closer to the connecting seat 31. When the free end 341 corresponds with the limiting groove 22 in the third direction, the free end 341 recovers its deformation and enters the limiting groove 22. When the anti-reverse surface 3411 contacts the end of the limiting groove 22 near the base plate 13, the free end 341 will not deform in the direction toward the connecting seat 31.

[0162] When installing the connector 31 on the base 2, the connection between the connector 31 and the base 2 can be achieved simply by moving the connector 31 along the first direction. The assembly is simple and quick, which helps to shorten the production cycle of the battery device. Tool-free installation of the connector 31 can be achieved; it can be slid into place, simplifying the assembly process of the connector 31.

[0163] Reference Figure 6 as well as Figure 9 As an optional solution, the base 2 includes two spaced-apart guides 23; the placement groove 21 includes a first groove 211 and a second groove 212, the first groove 211 and the second groove 212 are respectively disposed on opposite sides of the two guides 23, and the first groove 211 and the second groove 212 are disposed along a first direction; the connecting seat 31 is located between the two guides 23, and two sliding members 33 are provided, the two sliding members 33 are respectively disposed in the first groove 211 and the second groove 212.

[0164] For example, two guide parts 23 are integrally disposed on the base 2, the length of the two guide parts 23 is arranged along the first direction, the two guide parts 23 are located on the side of the base 2 facing the connecting seat 31, the two guide parts 23 are spaced apart along the second direction of the base 2, and are located at both ends of the base 2 along the second direction.

[0165] Two guide sections 23 are respectively provided with a first groove 211 and a second groove 212 on opposite sides along the second direction. The first groove 211 and the second groove 212 pass through the end of the guide section 23 facing the base plate 13.

[0166] In this embodiment, the first groove 211 and the second groove 212 have the same cross-section. In another embodiment, the cross-sections of the first groove 211 and the second groove 212 may be different. The opening of the first groove 211 is smaller than the bottom of the groove. The opening and bottom of the first groove 211 are arranged sequentially along the second direction. In this embodiment, the cross-section of the first groove 211 is L-shaped.

[0167] Reference Figure 9 Two sliders 33 are provided, located on opposite sides of the connecting base 31 along the second direction. Each slider 33 includes a first slider and a second slider, with the first slider closer to the connecting base 31 than the second slider. The length of the first slider along the first direction is greater than the length of the second slider along the first direction, and the thickness of the first slider along the third direction is less than the thickness of the second slider along the third direction. The first slider, the second slider, and the connecting base 31 are integrally formed. The first slider is located at the opening of the first groove 211, and the second slider is located at the bottom of the first groove 211.

[0168] The connecting seat 31 is located between the two guide portions 23. Specifically, along the second direction, the connecting seat 31 is located between the two guide portions 23; along the third direction, the connecting seat 31 does not protrude from the guide portions 23.

[0169] By sliding the two sliding parts 33 onto the first groove 211 and the second groove 212 respectively, the stability of the sliding of the connecting seat 31 is improved. The guide parts 23 located on both sides of the connecting seat 31 protect the detection body 3 and reduce the chance of the detection body 3 being bumped.

[0170] Reference Figure 9 As an optional solution, the end of the limiting groove 22 facing the base plate 13 is the first end 221, and when the limiting member 34 abuts against the first end 221, the detection body 3 is in the first position.

[0171] It should be noted that, since there is only one first position, in one embodiment, when the limiting member 34 abuts against the first end 221, the connecting seat 31 is in the first position. In this embodiment, the position of the connecting seat 31 when it abuts against the base plate 13, as described below, is selected as the first position.

[0172] Compared to the scheme where the connecting seat is in the first position when the sensor 32 directly abuts against the base plate 13, this embodiment sets the limiting member 34 to abut against the first end 221. At this time, there is a gap between the sensor 32 and the base plate 13, which controls the minimum distance between the connecting seat 31 and the base plate 13 along the first direction, reducing the possibility of the sensor 32 being easily damaged due to direct contact with the base plate 13.

[0173] Reference Figure 7 As an alternative, the length of the sensor 32 is set along the first direction, one end of the sensor 32 away from the base plate 13 is fixedly connected to the connecting seat 31, and the other end is spaced apart from the base plate 13.

[0174] When the sensor 32 is pressed by the base plate 13, the sensor 32 can transmit the force of the base plate 13 to the connecting seat 31, and the connecting seat 31 moves in the first direction, thereby reducing the pressure of the base plate 13 on the sensor 32 and reducing the damage to the sensor 32 caused by the pressure of the base plate 13.

[0175] Reference Figure 7 As an alternative, the end of the connector 31 facing the base plate 13 is provided with a receiving groove 312, and the end of the sensor 32 facing the base plate 13 is located in the receiving groove 312.

[0176] For example, the receiving groove 312 is disposed at one end of the connecting seat 31 facing the base plate 13, and the sensing element 32 is located in the receiving groove 312.

[0177] The preload 4 presses against the connecting seat 31, causing the connecting seat 31 to abut against the base plate 13, thus bringing the sensor 32 close to the base plate 13. When the base plate 13 deforms, it applies pressure to the connecting seat 31, causing the connecting seat 31 to move along the first direction. The connecting seat 31 can protect the sensor 32 and reduce the risk of damage to the sensor 32.

[0178] The sensor 32 located in the receiving groove 312 is protected by the connecting seat 31. When installing the detection body 3 and the connecting seat 31, as well as the connecting seat 31 and the base 2, the sensor 32 is less likely to be bumped or damaged, thus reducing the occurrence of collision damage to the sensor 32 and improving the ease of installation of the detection mechanism.

[0179] Reference Figure 8 As an optional solution, the end of the connecting seat 31 facing the base plate 13 is provided with a communication port 316, which connects the outer peripheral space of the connecting seat 31 and the receiving groove 312. When the connecting seat 31 abuts against the base plate 13, the connecting seat 31 is in the first position.

[0180] For example, the connecting port 316 extends through the end of the connecting seat 31 away from the base 2 and the side wall 14 of the receiving groove 312, so that the part of the connecting seat 31 facing the base plate 13 and abutting against the base plate 13 forms an open area, thereby connecting the receiving groove 312 and the outer peripheral space of the connecting seat 31.

[0181] In another embodiment, the communication port 316 extends through the end of the connecting seat 31 facing the base plate 13 and the side wall 14 of the receiving groove 312. In another embodiment, the communication port extends through at least one end of the connecting seat 31 along a second direction and the side wall 14 of the receiving groove 312.

[0182] When the connector 31 is in the first position, if there is liquid on the base plate 13, the liquid will enter the receiving groove 312 through the connecting port 316. The liquid can contact the sensing element 32 in the receiving groove 312 and be detected by the detection body 3.

[0183] Reference Figure 9 As an optional solution, the pretensioner 4 includes a compression spring, with one end of the compression spring facing the base plate 13 abutting against the detection body 3 and the other end abutting against the base 2.

[0184] For example, the compression spring is arranged along the first direction and is always in a compressed state. One end of the compression spring facing the base plate 13 abuts against the detection body 3, and the other end abuts against the base 2. When the connecting seat 31 moves from the first position to the second position, the compression spring is further compressed and deformed.

[0185] When the base plate 13 deforms and squeezes the detection body 3, the connecting seat 31 can move toward the second position or move to the second position. The pre-tightening member 4 continues to apply pressure to the connecting seat 31 to maintain the stability of the connecting seat 31 on the base 2.

[0186] Reference Figure 10 As an optional solution, the base 2 has a placement groove 21 arranged along the first direction, and the placement groove 21 includes a second end 213 away from the base plate 13; the detection body 3 includes a slider 33, which slides in the placement groove 21 along the first direction.

[0187] The compression spring is located in the placement groove 21. One end of the compression spring facing the base plate 13 abuts against the sliding member 33, and the other end abuts against the second end 213.

[0188] For example, the end of the compression spring facing the base plate 13 abuts against the slider 33, and the end facing away from the base plate 13 abuts against the second end 213. Furthermore, a hole is provided on the second end 213, which passes through the end of the guide portion 23 facing away from the base plate 13.

[0189] By placing the compression spring in the placement groove 21, the installation of the compression spring is facilitated, and the deformation of the compression spring along the radial direction is reduced, so as to maintain the compression spring applying stable pressure to the connecting seat 31.

[0190] Reference Figure 12 As an optional solution, a sampling harness 5 is also included, one end of which is connected to the sensor 32 for signal transmission.

[0191] For example, the sampling harness 5 is connected to the sensor 32, and the sensor 32 outputs the acquired current change signal to the outside through the sampling harness 5.

[0192] In another embodiment, a wireless communication module is electrically connected to the sensor 32, and the wireless communication module transmits signals with other wireless communication modules on the battery device.

[0193] By connecting the sampling harness 5 to the sensor 32, the data detected by the sensor 32 is stably transmitted outwards. The signal transmitted by the sampling harness 5 is less susceptible to interference from external electromagnetic signals. The sampling harness 5 can transmit the weak current signal collected by the sensor 32 with higher transmission accuracy. The real-time performance of the signal transmitted by the sampling harness 5 is stronger, which is beneficial for the detection body 3 to quickly output the acquired signal.

[0194] Reference Figure 12 As an optional solution, the sensing element 32 includes a first probe 321 and a second probe 322. When the first probe 321 and the second probe 322 can contact the conductive liquid, the first probe 321 and the second probe 322 can form a conductive circuit with the conductive liquid.

[0195] The detection body 3 also includes a resistor 35, the two ends of which are electrically connected to the first probe 321 and the second probe 322 respectively, and the resistor 35 is connected in parallel with the conductive liquid between the first probe 321 and the second probe 322.

[0196] In this embodiment, resistor 35 is fixed on circuit board 36 and electrically connected to first probe 321 and second probe 322. In another embodiment, resistor 35 can be electrically connected to first probe 321 and second probe 322 via wires.

[0197] For example, the first probe 321 and the second probe 322 are spaced apart along the second direction, and the distance between the first probe 321 and the second probe 322 and the base plate 13 is equal.

[0198] When there is no conductive liquid between the first probe 321 and the second probe 322, a circuit is formed between the first probe 321, the resistor 35 and the second probe 322, and current flows in the circuit. This allows us to determine that the first probe 321, the second probe 322 and the circuit in which they are located are without faults.

[0199] When there is conductive liquid between the first probe 321 and the second probe 322, the conductive liquid can be considered as an equivalent resistance 35. The equivalent resistance 35 is connected in parallel with the resistor 35. Under the condition that the voltage between the first probe 321 and the second probe 322 remains unchanged, the current in the circuit increases. The setting of resistor 35 enables the detection body 3 to monitor the liquid while also detecting whether the circuit is faulty, thereby improving the accuracy of liquid monitoring.

[0200] Reference Figure 12 As an optional solution, the detection body 3 also includes a circuit board 36, on which the resistor 35, the first probe 321 and the second probe 322 are all disposed.

[0201] Specifically, resistor 35, first probe 321, and second probe 322 are integrated and fixed on circuit board 36 using an integrated reflow soldering process. Other electrical components can also be installed on circuit board 36.

[0202] Resistor 35, first probe 321, and second probe 322 are mounted on circuit board 36, resulting in a more uniform contact area and lower contact resistance between the first probe 321 and the second probe 322 and circuit board 36. The more precise relative positions of the first probe 321 and the second probe 322 and circuit board 36 facilitate accurate control of the gap between sensor 32 and base plate 13 after circuit board 36 is mounted on connector 31.

[0203] It should be noted that regardless of whether the detection body 3 includes resistor 35, the sensing element 32 is fixed on the circuit board 36. For details, please refer to the following content.

[0204] Reference Figure 12 As an optional solution, the detection body 3 also includes a circuit board 36, which is fixed to the connector 31, and the sensor 32 is fixed to the circuit board 36. At least a portion of the sensor 32 extends out of the circuit board 36 in the direction of the first direction toward the base plate 13.

[0205] Reference Figure 13 The connecting seat 31 has an installation groove on the side opposite to the base 2. The installation groove is a square groove and the bottom of the groove is a support surface 313. The connecting seat 31 is also provided with a limit buckle 314. The limit buckle 314 and the support surface 313 are spaced apart along a third direction. Four limit buckles 314 are arranged in an array along the first direction and the second direction. The circuit board 36 is located between the support surface 313 and the limit buckle 314.

[0206] Move the circuit board 36 along the third direction so that after the circuit board 36 passes the limiting buckle 314, the circuit board 36 contacts the support surface 313. At this time, the limiting buckle 314 can contact the side of the circuit board 36 away from the base 2, so as to realize the installation connection between the circuit board 36 and the connecting seat 31.

[0207] In this embodiment, the sensor 32 includes a first probe 321 and a second probe 322. The first probe 321 and the second probe 322 are spaced apart along a second direction. Both the first probe 321 and the second probe 322 are spring pins with their lengths arranged along a first direction. One end of the first probe 321 and the second probe 322 along the first direction is fixed on the circuit board 36, and the other end extends out of the circuit board 36.

[0208] By connecting the circuit board 36 to the sensing element 32, a more uniform contact area between the probe and the circuit board 36 is achieved, resulting in lower contact resistance. This facilitates the installation of electrical components similar to capacitors or inductors on the circuit board 36, enabling the detection body 3 to output accurate detection signals. The more precise relative spacing and position of the probe and the circuit board 36 connection improves the consistency of the detection bodies 3 produced in batches, and helps to accurately control the gap between the sensing element 32 and the base plate 13 after the circuit board is installed on the connector 31.

[0209] When there is conductive liquid on the base plate 13, the conductive liquid will first come into contact with the sensing element 32, reducing the contact between the conductive liquid and the circuit board 36, thus affecting the normal use of the circuit board 36.

[0210] Reference Figure 13 As an optional solution, a positioning pin 315 is provided between the circuit board 36 and the connector 31.

[0211] For example, the connector 31 is provided with a positioning pin 315, and the circuit board 36 is provided with a positioning hole that matches the positioning pin 315. In this embodiment, the positioning pin 315 is provided on the support surface 313, and the positioning pin 315 is integrally formed with the connector 31. There are three positioning pins 315. In another embodiment, positioning holes can be opened on the connector 31, and positioning pins can be provided on the circuit board 36.

[0212] The positioning pin 315 and the positioning hole cooperate to facilitate the precise installation of the circuit board 36 and the connector 31, which helps to control the position of the sensor 32 on the connector 31, and helps to reduce the gap between the sensor 32 and the base plate 13 when the connector 31 is installed on the base 2, thereby improving the timeliness of the sensor 32 in detecting liquid.

[0213] Reference Figure 13 As an optional solution, the detection body 3 also includes a protective cover 37, which is fixedly connected to the connector 31 and covers the circuit board 36.

[0214] For example, the protective cover 37 is a square plate that covers the circuit board 36, and the protective cover 37 is detachably fixedly connected to the connector 31.

[0215] The protective cover 37 protects the circuit board 36 and the connection point between the circuit board 36 and the sensor 32, reducing the risk of damage to the circuit board 36 during assembly or later maintenance. The protective cover 37 also reduces the adhesion or corrosion of foreign objects to the circuit board 36, which is beneficial for its normal operation.

[0216] Reference Figure 13 as well as Figure 14 As an optional solution, the connector 31 is provided with a slide groove 311, and the protective cover 37 is slidably mounted on the connector 31 through the slide groove 311. The protective cover 37 can slide to a third position, and the protective cover 37 in the third position covers the circuit board 36.

[0217] A fixing buckle 38 is also provided between the protective cover 37 and the connecting seat 31, and the protective cover 37 in the third position is locked to the connecting seat 31 by the fixing buckle 38.

[0218] For example, a groove 311 is provided at one end of the connector 31 along the second direction. The depth of the groove 311 is along the second direction. The groove 311 is located above the circuit board 36. The groove 311 does not penetrate either end of the connector 31 along the first direction.

[0219] When the end of the protective cover 37 along the second direction contacts the bottom of the groove 311, the protective cover 37 is in the third position. When the protective cover 37 slides to the third position along the second direction, the protective cover 37 covers the circuit board 36.

[0220] The protective cover 37 is provided with a fixing buckle 38. When the fixing buckle 38 is engaged with the connecting seat 31, the fixing buckle 38 prevents the protective cover 37 from moving along the bottom of the slide groove 311 toward the groove opening.

[0221] The sliding assembly and snap-fit ​​mechanism between the protective cover 37 and the connecting seat 31 facilitates the installation of the protective cover 37 and ensures a stable connection with the connecting seat 31. The protective cover 37 automatically locks in place once slid into position, simplifying the assembly process.

[0222] Reference Figure 12 As an optional solution, a sampling harness 5 is also included. One end of the sampling harness 5 is connected to the circuit board 36, and the sampling harness 5 is signal-connected to the sensor 32 through the circuit board 36. The sensor 32 includes a first probe 321 and a second probe 322. The ends of the first probe 321 and the second probe 322 away from the base plate 13 are fixedly connected to the circuit board 36. The detection body 3 also includes a resistor 35, which is fixed to the circuit board 36. The two ends of the resistor 35 are electrically connected to the first probe 321 and the second probe 322 respectively.

[0223] Reference Figure 13 For example, the sensor 32 pins, resistor 35, and sampling harness 5 are integrally reflow soldered onto the circuit board 36. The connector 31 is also provided with a clearance notch to allow the sampling harness 5 and the sensor 32 to pass through.

[0224] The circuit board 36 enables signal connection between the sensor 32 and the sampling harness 5. The resistor 35 on the circuit board 36 is connected to the first probe 321 and the second probe 322. After the sensor 32 and the sampling harness 5 are fixed on the circuit board 36, the circuit board 36 and the connector 31 are installed. The circuit board 36 has a high degree of integration, which enables the assembly of the detection body 3.

[0225] Reference Figures 2 to 14As an optional solution, the battery device includes a housing 1 and a detection mechanism. The housing 1 includes a base plate 13 and an inner cavity for placing battery cell components. The detection mechanism includes a base 2, a detection body 3, and a pre-tightening member 4. The base 2 is disposed in the inner cavity of the housing 1 and located above the base plate 13. The detection body 3 includes a connecting seat 31 and a sensing element 32. The connecting seat 31 is slidably mounted on the base 2 along a first direction. The connecting seat 31 can slide from a first position to a second position along the first direction. The second position is away from the base plate 13 relative to the first position along the first direction, which is the thickness direction of the base plate 13. The sensing element 32 is fixed on the connecting seat 31. When the connecting seat 31 is in the first position, the end of the sensing element 32 facing the base plate 13 is spaced apart from the base plate 13. The pre-tightening member 4 is connected to the base 2 and the detection body 3. When the connecting seat 31 is between the first position and the second position, the pre-tightening member 4 maintains a force applied to the detection body 3 towards the base plate 13.

[0226] The base 2 has a placement groove 21 and a limiting groove 22 arranged along a first direction. The detection body 3 includes a limiting member 34 fixedly connected to the connecting seat 31. When the connecting seat slides from the first position to the second position, the limiting member 34 is in the limiting groove 22. The placement groove 21 passes through the end of the base 2 facing the bottom plate 13. The limiting member 34 includes a free end 341 fixed to the connecting seat 31. The free end 341 protrudes from the connecting seat 31 along a third direction and is located in the limiting groove 22. The third direction is the direction from the bottom of the groove to the opening of the groove. The limiting member 34 can generate elastic deformation under external force, causing the free end 341 to move towards the connecting seat 31 along the third direction. The free end 341 includes a stop surface 3411 and a guide surface 3412. The stop surface 3411 and the guide surface 3412 are the two end faces of the free end 341 along the first direction. The angle between the stop surface 3411 and the first direction is a right angle, and the angle between the guide surface 3412 and the first direction is an acute angle. The base 2 includes two spaced-apart guide portions 23; the placement groove 21 includes a first groove 211 and a second groove 212, the first groove 211 and the second groove 212 are respectively disposed on opposite sides of the two guide portions 23, and the first groove 211 and the second groove 212 are disposed along a first direction; the connecting seat 31 is located between the two guide portions 23, and two sliding members 33 are provided, the two sliding members 33 are respectively disposed in the first groove 211 and the second groove 212.

[0227] The length of the sensing element 32 is set along a first direction. A receiving groove 312 is provided at one end of the connecting seat 31 facing the base plate 13, and the end of the sensing element 32 facing the base plate 13 is located within the receiving groove 312. A communicating port is provided at one end of the connecting seat 31 facing the base plate 13, connecting the outer peripheral space of the connecting seat 31 with the receiving groove 312. When the connecting seat 31 abuts against the base plate 13, the connecting seat 31 is located in a first position.

[0228] The pretensioning member 4 includes a compression spring. One end of the compression spring facing the base plate 13 abuts against the detection body 3, and the other end abuts against the base 2. The compression spring is located in the placement groove 21. One end of the compression spring facing the base plate 13 abuts against the sliding member 33, and the other end abuts against the second end 213.

[0229] The detection body 3 also includes a circuit board 36, which is fixed to the connector 31, and the sensor 32 is fixed to the circuit board 36. A positioning pin is provided between the circuit board 36 and the connector 31. The detection body 3 also includes a protective cover 37, which is fixedly connected to the connector 31 and covers the circuit board 36. The connector 31 is provided with a sliding groove 311, and the protective cover 37 is slidably mounted on the connector 31 through the sliding groove 311. The protective cover 37 can slide to a third position, where it covers the circuit board 36. A fixing buckle 38 is also provided between the protective cover 37 and the connector 31, and the protective cover 37 in the third position is locked to the connector 31 by the fixing buckle 38.

[0230] The battery device also includes a sampling harness 5, one end of which is connected to the circuit board 36. The sampling harness 5 is connected to the sensor 32 via the circuit board 36. The sensor 32 includes a first probe 321 and a second probe 322. When the first probe 321 and the second probe 322 are in contact with the conductive liquid, they can form a conductive circuit with the conductive liquid. The detection body 3 also includes a resistor 35, which is fixed to the circuit board 36. The two ends of the resistor 35 are electrically connected to the first probe 321 and the second probe 322 respectively. The resistor 35 and the equivalent resistance are connected in parallel between the first probe 321 and the second probe 322. The sensor 32 extends out of the circuit board 36 in the direction of the first direction toward the base plate 13.

[0231] The housing 1 includes a side wall 14, and the base 2 is detachably fixedly connected to the side wall 14. The side wall 14 is provided with connecting holes, including a first hole and a second hole, the specifications of the first hole and the second hole are different; a connecting part is fixed on the base plate 13, the connecting part includes a first protrusion and a second protrusion, the specifications of the first protrusion correspond to the specifications of the first hole and the first protrusion passes through the first hole, the specifications of the second protrusion correspond to the specifications of the second hole and the second protrusion passes through the second hole.

[0232] During installation, the sensor 32, resistor 35 and sampling harness 5 are first soldered and fixed to the circuit board 36. After the circuit board 36 is connected to the connector 31 via the positioning pin 315, the protective cover 37 is moved in the slide groove 311 to install the protective cover 37 and the connector 31, thereby realizing the installation of the detection body 3.

[0233] Next, the testing mechanism is assembled. The pre-tightening component 4 is placed into the receiving groove 312. The assembled testing body 3 moves along the first direction, so that the sliding component 33 enters the placement groove 21 and presses against the pre-tightening component 4. The limiting component 34 enters the limiting groove 22, thus realizing the assembly of the testing mechanism.

[0234] A connection hole 141 is pre-drilled on the side wall 14, and the connecting part 24 of the detection mechanism is snapped into the connection hole 141 to fix it, thereby realizing the installation of the detection mechanism and the side wall 14.

[0235] Secondly, embodiments of this application also provide an electrical device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to provide or store electrical energy.

[0236] The above technical solution improves the liquid detection process to reduce the problem of damage to the liquid detection mechanism when the base plate of the electrical equipment deforms.

[0237] Thirdly, embodiments of this application also provide an energy storage device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to provide or store electrical energy.

[0238] The above technical solution improves the liquid detection process to reduce the problem of damage to the liquid detection mechanism when the base plate of the energy storage device deforms.

[0239] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and the foregoing description of this application are intended to cover non-exclusive inclusion.

[0240] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0241] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

[0242] This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, This includes the enclosure and the testing mechanism; among which, The housing includes a base plate and an inner cavity for placing individual battery cells; The testing mechanism includes a base, a testing body, and pre-tightening components; wherein... The base is disposed within the inner cavity of the housing and is located above the bottom plate; The detection body includes a connecting seat and a sensing element. The connecting seat is slidably mounted on the base along a first direction. The connecting seat can slide from a first position to a second position along the first direction. The second position is away from the base plate relative to the first position along the first direction. The first direction is a direction that is parallel to or forms an acute angle with the thickness direction of the base plate. The sensing element is fixed on the connecting seat. When the connecting seat is in the first position, the end of the sensing element facing the base plate is spaced apart from the base plate. The pre-tightening member is connected to the base and the detection body. When the connecting seat is between the first position and the second position, the pre-tightening member maintains a force applied to the detection body toward the base plate.

2. The battery device according to claim 1, characterized by The detection body also includes a circuit board, which is fixed on the connector. The sensor is fixed on the circuit board and faces the base plate in the first direction. At least a portion of the sensor extends out of the circuit board.

3. The battery device of claim 2, wherein A positioning pin is provided between the circuit board and the connector.

4. The battery device of claim 2, wherein The detection body also includes a protective cover, which is fixedly connected to the connector and covers the circuit board.

5. The battery device of claim 4, wherein, The connector is provided with a sliding groove, and the protective cover is slidably mounted on the connector through the sliding groove. The protective cover can slide to a third position, and the protective cover in the third position covers the circuit board. A fixing buckle is also provided between the protective cover and the connecting seat, and the protective cover located at the third position is locked to the connecting seat by the fixing buckle.

6. The battery device of claim 1, wherein The end of the connector facing the base plate is provided with a receiving groove, and the end of the sensor facing the base plate is located in the receiving groove.

7. The battery device of claim 6, wherein The connecting seat has a communication port at one end facing the base plate, and the communication port connects the outer peripheral space of the connecting seat with the receiving groove. When the connecting seat abuts against the base plate, the connecting seat is located in the first position.

8. The battery device of claim 1, wherein The base is provided with a limiting groove arranged along the first direction; The detection body includes a limiting member fixedly connected to the connecting seat. When the connecting seat slides from the first position to the second position, the limiting member is in the limiting groove.

9. The battery device of claim 8, wherein, The end of the limiting groove facing the base plate is the first end, and the detection body is located at the first position when the limiting member abuts against the first end.

10. The battery device of claim 9, wherein, The limiting member includes a free end, which protrudes from the connecting seat along a third direction and is located in the limiting groove. The third direction is the direction from the bottom of the limiting groove to the opening of the groove. When the limiting member is subjected to external force, it can generate elastic deformation, causing the free end to move toward the connecting seat along the third direction.

11. The battery device of claim 10, wherein, The free end includes an inlet surface and a stop surface, which are the two end surfaces of the free end along the first direction.

12. The battery device of claim 1, wherein, The length of the sensor is set along a first direction, and one end of the sensor away from the base plate is fixedly connected to the connecting seat, while the other end is spaced apart from the base plate.

13. The battery device of claim 1, wherein The pretensioning component includes a compression spring, one end of which faces the base plate and abuts against the detection body, and the other end of which abuts against the base.

14. The battery device of claim 13, wherein, The base has a placement groove arranged along the first direction, and the placement groove includes a second end away from the base plate; the detection body includes a sliding member fixed on the connecting seat, and the sliding member slides in the placement groove along the first direction; The compression spring is located in the placement groove, with one end of the compression spring facing the base plate abutting against the sliding member, and the other end abutting against the second end.

15. The battery device of claim 14, wherein, The base includes two spaced-apart guide sections; The placement slot includes a first slot and a second slot, which are respectively disposed on opposite sides of the two guide portions in a one-to-one correspondence, and the first slot and the second slot are disposed along the first direction; The connecting seat is located between the two guide portions, and two sliding members are fixed on the connecting seat. The two sliding members are respectively located in the first groove and the second groove.

16. The battery device according to any one of claims 1 to 15, wherein The sensing element includes a first probe and a second probe. When the first probe and the second probe are in contact with the conductive liquid, the first probe and the second probe can form a conductive circuit with the conductive liquid. The detection body also includes a resistor, the two ends of which are electrically connected to the first probe and the second probe respectively, and the resistor and the conductive liquid are connected in parallel between the first probe and the second probe.

17. The battery device of claim 1, wherein, The housing includes side walls, and the base is detachably fixed to the side walls.

18. The battery device of claim 17, wherein, The side wall is provided with a connection hole, which includes a first hole and a second hole, and the specifications of the first hole and the second hole are different. The base is fixed with a connecting part, which includes a first protrusion and a second protrusion. The specifications of the first protrusion correspond to the specifications of the first hole, and the first protrusion passes through the first hole. The specifications of the second protrusion correspond to the specifications of the second hole, and the second protrusion passes through the second hole.

19. An electrical device, comprising: It includes a plurality of battery devices according to any one of claims 1 to 18, the battery devices being used to store or provide electrical energy.

20. An energy storage device, comprising: It includes a plurality of battery devices according to any one of claims 1 to 18, the battery devices being used to store or provide electrical energy.

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