Energy storage device

Abstract

The invention discloses energy storage equipment, which comprises a battery pack, a waterproof plug, a first detection piece and a detection unit, and is characterized in that the battery pack comprises a shell, and the shell is provided with an opening; the waterproof plug is configured to seal the opening; the first detection piece is arranged in a gap between the waterproof plug and the shell, and the first detection piece is configured to form a first signal under the condition of water immersion; the detection unit is configured to detect the first signal to determine that water enters the gap. According to the energy storage equipment, the first detection piece is arranged through the gap between the waterproof plug and the shell, the first signal can be formed under the condition that the first detection piece is immersed in water, and meanwhile the detection unit is used for detecting the first signal to judge that water enters the gap; if water enters a gap, the water possibly enters the shell of the battery pack to damage a circuit, and early warning and treatment can be performed in advance through detection, so that damage expansion is prevented, and even damage is prevented. In addition, the waterproof plug is small in size and simple in structure, and the production cost of the energy storage equipment is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and more specifically, to an energy storage device. Background Art

[0002] Energy storage equipment generally includes a plurality of battery packs stacked together. The bottom of the outer shell of each battery pack is usually formed with an opening and a connection terminal is provided at the opening. During assembly, each battery pack is connected to the battery pack below through the connection terminal. At the same time, the battery pack below seals the opening of the battery pack above, and the battery pack at the bottom is sealed with a waterproof plug. However, when water accumulates on the ground where the energy storage equipment is set up, the battery pack is easily flooded due to the presence of the opening, especially when the water level overflows the waterproof plug of the bottom battery pack, which can easily damage the energy storage equipment or cause safety accidents. Summary of the invention

[0003] The embodiments of the present application provide an energy storage device to solve at least one of the above-mentioned technical problems.

[0004] The energy storage device of the embodiment of the present application includes:

[0005] A battery pack, the battery pack comprising a shell, the shell having an opening;

[0006] a waterproof plug configured to close the opening;

[0007] a first detection member, the first detection member being disposed in a gap between the waterproof plug and the housing, the first detection member being configured to generate a first signal in the event of water immersion;

[0008] A detection unit is configured to detect the first signal to determine that water has entered the gap.

[0009] The energy storage device proposed in the embodiment of the present application sets a first detection member through the gap between the waterproof plug and the shell, and can generate a first signal when the first detection member is immersed in water. At the same time, the detection unit detects the first signal to determine whether water has entered the gap. If water has entered the gap, it may enter the shell of the battery pack and cause circuit damage. Through detection, early warning and early processing can be carried out to prevent damage from expanding or even preventing damage from occurring. In addition, the waterproof plug is small in size and simple in structure, which is conducive to reducing the production cost of energy storage equipment.

[0010] In some embodiments, the waterproof plug includes a sealing bottom plate and a first connecting tube extending from the sealing bottom plate in a direction perpendicular to the sealing bottom plate, and the waterproof plug is configured such that when the opening is closed, the first connecting tube extends into the opening, and the first detection member is disposed at the connection between the sealing bottom plate and the first connecting tube.

[0011] In this way, the first detection member is arranged at the connection between the sealing bottom plate and the first connecting tube, and can identify in advance when water has not completely entered the battery pack, which is beneficial to improving the reliability of the energy storage device.

[0012] In some embodiments, the battery pack further includes a connection terminal, which is disposed at the opening and is electrically connected to the detection unit. When the waterproof plug closes the opening, the first detection member is electrically connected to the connection terminal.

[0013] In this way, the connection between the first detection member and the detection unit is achieved through the connection terminal, which is helpful to reduce the difficulty of connecting the first detection member and the detection unit.

[0014] In some embodiments, the connecting terminal includes a first contact end and a second contact end, the detection unit is connected to the first contact end and the second contact end, the first detection member includes a first detection wire group, a first connection end and a second connection end, the first connection end is connected to the second connection end through the first detection wire group, and when the waterproof plug closes the opening, the first connection end is electrically connected to the first contact end, and the second connection end is electrically connected to the second contact end, and the detection unit detects the electrical parameters of the first detection wire group through the first contact end and the second contact end to detect the first signal.

[0015] In this way, the detection unit realizes electrical connection with the first detection component and detects the electrical parameters of the first detection line group through the first contact end, the second contact end, the first connection end and the second connection end. The detection unit can detect whether there is water leakage at the opening of the battery pack by detecting changes in the electrical parameters of the first detection line group.

[0016] In some embodiments, the first detection line group includes a first detection line and a second detection line that are spaced apart from each other, the first detection line is connected to the first connection end, and the second detection line is connected to the second connection end.

[0017] In this way, when the first detection element is flooded, the first detection line and the second detection line will be immediately short-circuited by water to form a first signal, and transmitted to the detection unit through the first connection end and the second connection end, which is conducive to the detection unit to detect the first signal in time.

[0018] In some embodiments, the electrical parameter includes any one or any combination of voltage, current or resistance of the first detection line group.

[0019] In this way, a more convenient test or more accurate parameter can be flexibly selected according to actual conditions to detect the first signal.

[0020] In some embodiments, the waterproof plug also includes a second detection member, which is arranged on a surface of the waterproof plug facing away from the battery pack, and when the waterproof plug closes the opening, the second detection member is electrically connected to the connecting terminal, and the second detection member is configured to form a second signal in the case of water immersion, and the detection unit is configured to detect the second signal to determine whether there is water on the bottom surface of the battery pack.

[0021] In this way, whether there is water on the bottom of the battery pack can be determined by the second signal emitted when the second detection element is immersed in water, which is helpful for obtaining information in advance when water accumulation just occurs, so as to make preparations in advance to avoid water entering the battery pack.

[0022] In some embodiments, the connecting terminal includes a second contact end and a third contact end, the detection unit is connected to the second contact end and the third contact end, the second detection member includes a second detection line group, a second connection end and a third connection end, the second connection end is connected to the third connection end through the second detection line group, and when the waterproof plug closes the opening, the second connection end is electrically connected to the second contact end, and the third connection end is electrically connected to the third contact end, and the detection unit detects the electrical parameters of the second detection line group through the second contact end and the third contact end to detect the second signal.

[0023] In this way, the detection unit achieves electrical connection with the second detection line group and detects the electrical parameters of the second water immersion detection line through the second contact terminal, the third contact terminal, the second connection terminal and the third connection terminal. The detection unit can detect whether there is water accumulation at the bottom of the battery pack by detecting changes in the electrical parameters of the second water immersion detection line.

[0024] In some embodiments, the electrical parameter includes any one or any combination of voltage, current or resistance value of the second detection line group.

[0025] In this way, a more convenient test or more accurate parameter can be flexibly selected according to actual conditions to detect the second signal.

[0026] In some embodiments, the second detection line group includes a third detection line and a fourth detection line that are spaced apart from each other, the third detection line is connected to the second connection end, and the fourth detection line is connected to the third connection end.

[0027] Thus, when the second detection line group is flooded, the third detection line and the fourth detection line will be immediately short-circuited by water to form a second signal, which is transmitted to the detection unit through the second connection end and the third connection end, which is beneficial for the detection unit to detect the second signal in time.

[0028] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic diagram of the structure of an energy storage device according to an embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the structure of the waterproof plug of the energy storage device according to the embodiment of the present application;

[0032] Figure 3 is a top view of a waterproof plug of an energy storage device according to an embodiment of the present application;

[0033] Figure 4 is a structural schematic diagram of a partial structure of an energy storage device according to an embodiment of the present application;

[0034] Figure 5 is a circuit diagram of an energy storage device according to an embodiment of the present application;

[0035] Figure 6 It is a bottom view of the waterproof plug of the energy storage device according to the embodiment of the present application.

[0036] Description of main component symbols: energy storage device 100, battery pack 10, shell 11, opening 12, connecting terminal 13, first contact end 131, second contact end 132, third contact end 133, waterproof plug 20, first detection member 21, first detection line group 211, first detection line 2111, second detection line 2112, first connection end 212, second connection end 213, sealing bottom plate 22, first connecting tube 23, elastic member 24, second detection member 25, second detection line group 251, third detection line 2511, fourth detection line 2512, third connection end 252, detection unit 30. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The disclosure herein provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described herein. Of course, they are merely examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art may appreciate the application of other processes and / or the use of other materials.

[0041] Energy storage equipment generally includes a plurality of battery packs stacked together. The bottom of the outer shell of each battery pack is usually formed with an opening and a connection terminal is provided at the opening. During assembly, each battery pack is connected to the battery pack below through the connection terminal. At the same time, the battery pack below seals the opening of the battery pack above, and the battery pack at the bottom is sealed with a waterproof plug. However, when water accumulates on the ground where the energy storage equipment is set up, the battery pack is easily flooded due to the presence of the opening, especially when the water level overflows the waterproof plug of the bottom battery pack, which can easily damage the energy storage equipment or cause safety accidents.

[0042] See also Figure 1 The energy storage device 100 of the embodiment of the present application includes a battery pack 10, a waterproof plug 20, a first detection member 21 and a detection unit 30. The battery pack 10 includes a shell 11, and the shell 11 has an opening 12; the waterproof plug 20 is configured to close the opening 12; the first detection member 21 is arranged in the gap between the waterproof plug 20 and the shell 11, and the first detection member 21 is configured to generate a first signal in the case of water immersion; the detection unit 30 is configured to detect the first signal to determine that water has entered the gap.

[0043] The energy storage device 100 proposed in the embodiment of the present application sets a first detection member 21 through the gap between the waterproof plug 20 and the shell 11, and can generate a first signal when the first detection member 21 is immersed in water. At the same time, the detection unit 30 is used to detect the first signal to determine whether water has entered the gap. If water has entered the gap, it may enter the shell 11 of the battery pack 10 and cause circuit damage. Through detection, early warning and early processing can be provided to prevent damage from expanding or even preventing damage from occurring. In addition, the waterproof plug 20 is small in size and simple in structure, which is conducive to reducing the production cost of the energy storage device 100.

[0044] For details, please refer to Figures 1 to 6, the energy storage device 100 refers to a device that can store electrical energy or other forms of energy and release it when needed to supply it to the power system or other equipment. In the embodiment of the present application, the energy storage device 100 refers to a portable energy storage device 100 for household use. The energy storage device 100 usually includes a functional module and a plurality of battery packs 10. The plurality of battery packs 10 are stacked, wherein the plurality of battery packs 10 may specifically include an energy storage integrated machine and at least one power pack. The energy storage integrated machine mainly includes an inverter and a battery module, and the power pack mainly includes a battery module. After the energy storage integrated machine and at least one power pack are stacked, they can be connected through their respective connection terminals 13 to achieve electrical conduction and signal conduction between the integrated machine and the power pack, thereby achieving battery capacity expansion of the energy storage device 100.

[0045] The battery pack 10 is the core part of the energy storage device 100 and is responsible for storing and releasing electric energy. In order to increase the amount of electric energy stored, there are generally multiple battery packs 10, and each battery pack 10 generally includes components such as a battery management system (BMS).

[0046] The outer shell 11 of the battery pack 10 is usually an injection-molded plastic shell 11. Handles for carrying and moving the battery pack 10 are provided on both sides of the outer shell 11 in the height direction. Support feet for supporting the outer shell 11 are provided at the bottom of the outer shell 11. When the battery pack 10 is used alone, the support feet can suspend the battery pack 10, which plays a certain waterproof role. Correspondingly, there is a receiving groove for accommodating the supporting feet on the top of the outer shell 11. When multiple battery packs 10 are stacked together, the supporting feet can be placed in the receiving groove to make the contact area of ​​the outer shells 11 of adjacent battery packs 10 larger, which can disperse the pressure and make the stacking more secure. In addition, since the opening 12 is usually provided at the bottom, the close fit of the outer shell 11 can also achieve sealing at the opening 12. The outer shell 11 is arranged in this way, so that multiple battery packs 10 are connected in the form of building blocks, which is convenient for users to reduce or expand the number of battery packs 10 according to their needs.

[0047] In the embodiment of the present application, the waterproof plug 20 is used to cover the opening 12 of the housing 11. When the waterproof plug 20 covers the opening 12, it will be attached to the housing 11, thereby generating a gap between the waterproof plug 20 and the housing 11. The first detection member 21 is disposed in the gap. When the accumulated water at the bottom of the battery pack 10 infiltrates from the gap, the first detection member 21 is flooded and generates a first signal to be sent to the detection unit 30. The detection unit 30 determines that water has entered the gap according to the first signal, and can issue an alarm according to the first signal to prevent excessive water infiltration.

[0048] Furthermore, in the embodiment of the present application, the first detection member 21 is disposed on the waterproof plug 20 . Specifically, the first detection member 21 is disposed on the surface of the waterproof plug 20 on the side close to the outer shell 11 , and the detection unit 30 is disposed in the battery pack 10 .

[0049] In some embodiments, the first detection member 21 may also be disposed on the surface of the housing 11 on a side close to the waterproof plug 20 .

[0050] See also Figure 2 and Figure 3 In some embodiments, the waterproof plug 20 includes a sealing bottom plate 22 and a first connecting tube 23 extending from the sealing bottom plate 22 in a direction perpendicular to the sealing bottom plate 22. When the waterproof plug 20 is configured to close the opening 12, the first connecting tube 23 extends into the opening 12, and the first detection member 21 is disposed at the connection between the sealing bottom plate 22 and the first connecting tube 23.

[0051] In this way, the first detection member 21 disposed at the connection between the sealing bottom plate 22 and the first connecting tube 23 can identify in advance that water has not completely entered the battery pack 10 , which is beneficial to improving the reliability of the energy storage device 100 .

[0052] Specifically, in the embodiment of the present application, the sealing bottom plate 22 and the first connecting tube 23 are an integral structure formed by integral processing, and the first connecting tube 23 is arranged in the middle of the sealing bottom plate 22. The sealing bottom plate 22 can be made of the same material as the housing 11. A groove is arranged on the side of the sealing bottom plate 22 facing away from the first connecting tube 23, corresponding to the position of the first connecting tube 23, so as to prevent defects such as shrinkage holes and stress concentration from being formed here during the injection molding process.

[0053] A second connecting tube is disposed inside the housing 11 and is disposed around the opening 12 . The first connecting tube 23 extends upward from the sealing bottom plate 22 through the opening 12 and cooperates with the second connecting tube.

[0054] Furthermore, the first detecting member 21 is disposed on the sealing bottom plate 22 . The first detecting member 21 is annular. The first detecting member 21 surrounds the first connecting tube 23 and is disposed near the connection between the sealing bottom plate 22 and the first connecting tube 23 .

[0055] In other embodiments, the first connecting member may also be disposed on the outer surface of the first connecting tube 23 or the inner surface of the second connecting tube.

[0056] In the embodiment of the present application, an elastic member 24 is further provided on the outer surface of the first connecting tube 23 , and the first connecting tube 23 is connected to the second connecting tube by interference fit via the elastic member 24 .

[0057] The elastic member 24 is cylindrical in shape as a whole, and is sleeved on the outer surface of the first connecting cylinder 23. When the waterproof plug 20 is installed on the battery pack 10, the elastic member 24 is at least partially located between the second connecting cylinder and the first connecting cylinder 23. The elastic member 24 produces elastic deformation, and its two sides respectively abut against the inner wall of the second connecting cylinder and the outer wall of the first connecting cylinder 23, so that the opening 12 is sealed. In addition, the friction force generated between the elastic member 24 and the inner wall of the second connecting cylinder and the outer wall of the first connecting cylinder 23 can fix the waterproof plug 20 in the opening 12 to prevent it from falling off easily.

[0058] Optionally, the elastic member 24 may be made of rubber, silicone, elastic plastic or other materials with a certain degree of elasticity.

[0059] See also Figures 2 to 4 In some embodiments, the battery pack 10 further includes a connection terminal 13 , which is disposed at the opening 12 . The connection terminal 13 is electrically connected to the detection unit 30 . When the waterproof plug 20 closes the opening 12 , the first detection member 21 is electrically connected to the connection terminal 13 .

[0060] In this way, the connection between the first detection member 21 and the detection unit 30 is achieved through the connection terminal 13 , which helps to reduce the difficulty of connecting the first detection member 21 and the detection unit 30 .

[0061] Specifically, in the embodiment of the present application, the connection terminal 13 cooperates with the waterproof plug 20 to achieve the connection between the first detection member 21 and the detection unit 30 .

[0062] Furthermore, the connection terminal 13 is also used for communication with other battery packs 10. Since the opening 12 is usually provided at the bottom, the connection terminal 13 is usually located at the bottom of the battery pack 10, and correspondingly, a connection plug is provided at the top of the battery pack 10. When two battery packs 10 are stacked on each other, the connection plug of the bottom battery pack 10 will be inserted into the opening 12 of the top battery pack 10 and electrically connected to the connection terminal 13, so that the two battery packs 10 can communicate with each other.

[0063] In other embodiments, the connection terminal 13 may be disposed at the top of the battery pack 10, and the connection plug may be disposed at the bottom of the battery pack 10. In this case, the waterproof plug 20 is used to connect with the connection plug and seal the connection plug.

[0064] See also Figure 5In some embodiments, the connecting terminal 13 includes a first contact terminal 131 and a second contact terminal 132, the detecting unit 30 is connected to the first contact terminal 131 and the second contact terminal 132, the first detecting member 21 includes a first detecting wire group 211, a first connecting terminal 212 and a second connecting terminal 213, the first connecting terminal 212 is connected to the second connecting terminal 213 through the first detecting wire group 211, when the waterproof plug 20 closes the opening 12, the first connecting terminal 212 is electrically connected to the first contact terminal 131, the second connecting terminal 213 is electrically connected to the second contact terminal 132, and the detecting unit 30 detects the electrical parameters of the first detecting wire group 211 through the first contact terminal 131 and the second contact terminal 132 to detect the first signal.

[0065] In this way, the detection unit 30 realizes electrical connection with the first detection component 21 through the first contact terminal 131, the second contact terminal 132, the first connection terminal 212 and the second connection terminal 213, and realizes the detection of electrical parameters of the first detection line group 211. The detection unit 30 can detect whether there is water leakage at the opening 12 of the battery pack 10 by detecting changes in the electrical parameters of the first detection line group 211.

[0066] Specifically, in the embodiment of the present application, when the first detection line group 211 is flooded, its electrical parameters will change, and the detection unit 30 detects the electrical parameters of the first detection line group 211 through the first contact terminal 131 and the second contact terminal 132 to detect the first signal.

[0067] Furthermore, in the embodiment of the present application, the first contact end 131 and the second contact end 132 of the connecting terminal 13 can be needle holders, and the first connecting end 212 and the second connecting end 213 of the first detecting member 21 can be signal pins. When the waterproof plug 20 closes the opening 12, the signal pin of the first detecting member 21 is inserted into the needle holder of the connecting terminal 13, thereby realizing the electrical connection between the first detecting member 21 and the connecting terminal 13.

[0068] In other embodiments, the first contact end 131 and the second contact end 132 of the connection terminal 13 may be signal pins, and the first connection end 212 and the second connection end 213 of the first detection member 21 may be pin sockets.

[0069] In some embodiments, the first detection line group 211 includes a first detection line 2111 and a second detection line 2112 that are spaced apart from each other. The first detection line 2111 is connected to the first connection end 212 , and the second detection line 2112 is connected to the second connection end 213 .

[0070] In this way, when the first detection element 21 is flooded, the first detection line 2111 and the second detection line 2112 will be immediately short-circuited by water to form a first signal, and transmitted to the detection unit 30 through the first connection end 212 and the second connection end 213, which is conducive to the detection unit 30 to detect the first signal in time.

[0071] Specifically, in the embodiment of the present application, the first detection line 2111 and the second detection line 2112 are spaced apart, which is equivalent to an open circuit, and the resistance approaches infinity. When the water level is too high, the first detection line 2111 and the second detection line 2112 are both immersed in water. At this time, the first detection line 2111 and the second detection line 2112 are connected by water, and the electrical parameters will change.

[0072] The interval between the first detection line 2111 and the second detection line 2112 should not be too large to avoid failure in conducting the first detection line 2111 and the second detection line 2112 .

[0073] Optionally, the shape of the first detection line 2111 can be arranged in an O-shape, an E-shape, an S-shape, an M-shape, an H-shape, etc., and such arrangement is to facilitate the first detection line 2111 and the second detection line 2112 to be connected by water. Similarly, the shape of the second detection line 2112 can be arranged in an O-shape, an E-shape, an S-shape, an M-shape, an H-shape, etc. In the embodiment of the present application, the first detection line 2111 is O-shaped, and the first detection line 2111 is arranged around the first connecting tube 23, and the second detection line 2112 is also O-shaped, and the second detection line 2112 is arranged around the first detection line 2111.

[0074] In some embodiments, the electrical parameter includes any one or any combination of voltage, current or resistance of the first detection line group 211 .

[0075] In this way, a more convenient test or more accurate parameter can be flexibly selected according to actual conditions to detect the first signal.

[0076] Specifically, compared with voltage and current, the resistance change of the first detection line group 211 is more obvious and easier to measure. Therefore, in the embodiment of the present application, the electrical parameter selects the resistance value of the first detection line group 211.

[0077] Further, the water immersion detection method is:

[0078] When there is no water immersion, the first detection line 2111 and the second detection line 2112 are insulated, and their resistance is usually greater than 1000 kilo-ohms. When water enters the gap between the waterproof plug 20 and the shell 11, that is, the inside of the battery pack 10, the first detection line 2111 and the second detection line 2112 in the gap will be connected by water, so that the resistance of the first detection line group 211 becomes smaller, usually tens to 100 kilo-ohms. At this time, water begins to enter the bottom of the battery pack 10 or there is water inside, and the battery pack 10 can be alarmed or protected, such as sounding an alarm and cutting off the power in time.

[0079] See also Figure 2 , Figure 5 and Figure 6 In some embodiments, the waterproof plug 20 further includes a second detection member 25, which is disposed on a surface of the waterproof plug 20 facing away from the battery pack 10. When the waterproof plug 20 closes the opening 12, the second detection member 25 is electrically connected to the connection terminal 13. The second detection member 25 is configured to generate a second signal in the case of water immersion, and the detection unit 30 is configured to detect the second signal to determine whether there is water on the bottom surface of the battery pack 10.

[0080] In this way, whether there is water on the bottom of the battery pack 10 can be determined by the second signal emitted by the second detection member 25 when it is immersed in water. This is helpful for obtaining information in advance when water accumulation just occurs, so as to make preparations in advance to prevent water from entering the battery pack 10.

[0081] Specifically, in the embodiment of the present application, the second detection member 25 is disposed on the surface of the sealing bottom plate 22 away from the housing 11. When water accumulates on the bottom of the battery pack 10 and the water level rises, the accumulated water will first contact the second detection member 25, causing the second detection member 25 to be flooded, so that the detection unit 30 detects water on the bottom and issues a first warning, informing the user that water has contacted the bottom of the battery pack 10 and is about to enter the battery pack 10. If the water level continues to rise, it will contact the first detection member 21, causing the first detection member 21 to be flooded, so that the detection unit 30 detects water entering the gap and issues a second warning, informing the user that water has begun to enter the battery pack 10 and should be handled in a timely manner.

[0082] See also Figure 5In some embodiments, the connecting terminal 13 includes a second contact terminal 132 and a third contact terminal 133, the detecting unit 30 is connected to the second contact terminal 132 and the third contact terminal 133, the second detecting member 25 includes a second detecting wire group 251, a second connecting terminal 213 and a third connecting terminal 252, the second connecting terminal 213 is connected to the third connecting terminal 252 through the second detecting wire group 251, when the waterproof plug 20 closes the opening 12, the second connecting terminal 213 is electrically connected to the second contact terminal 132, the third connecting terminal 252 is electrically connected to the third contact terminal 133, and the detecting unit 30 detects the electrical parameters of the second detecting wire group 251 through the second contact terminal 132 and the third contact terminal 133 to detect the second signal.

[0083] In this way, the detection unit 30 realizes electrical connection with the second detection line group 251 through the second contact terminal 132, the third contact terminal 133, the second connection terminal 213 and the third connection terminal 252, and realizes the detection of the electrical parameters of the second water immersion detection line. The detection unit 30 can detect whether there is water accumulation at the bottom of the battery pack 10 by detecting changes in the electrical parameters of the second water immersion detection line.

[0084] Specifically, in the embodiment of the present application, when the second detection line group 251 is flooded, its electrical parameters will change, and the detection unit 30 detects the electrical parameters of the second detection line group 251 through the second contact terminal 132 and the third contact terminal 133 to detect the second signal.

[0085] Furthermore, in the embodiment of the present application, the second contact end 132 and the third contact end 133 of the connecting terminal 13 can be needle holders, and the second connecting end 213 and the third connecting end 252 of the second detecting member 25 can be signal pins. When the waterproof plug 20 closes the opening 12, the signal pin of the second detecting member 25 is inserted into the needle holder of the connecting terminal 13, thereby realizing the electrical connection between the second detecting member 25 and the connecting terminal 13.

[0086] In other embodiments, the second contact end 132 and the third contact end 133 of the connection terminal 13 may be signal pins, and the second connection end 213 and the third connection end 252 of the first detection member 21 may be pin holders.

[0087] In some embodiments, the electrical parameter includes any one or any combination of voltage, current or resistance of the second detection line group 251 .

[0088] In this way, a more convenient test or more accurate parameter can be flexibly selected according to actual conditions to detect the second signal.

[0089] Specifically, compared with voltage and current, the resistance change of the second detection line group 251 is more obvious and easier to measure. Therefore, in the embodiment of the present application, the electrical parameter selects the resistance value of the first detection line group 211.

[0090] Further, the water immersion detection method is:

[0091] When there is no water immersion, the resistance of the second detection line group 251 is usually greater than 1000 kilo-ohms; when water contacts the outer surface of the bottom of the battery pack 10 chassis, the second detection line group 251 will be immersed in water, causing the resistance of the second detection line group 251 to decrease, usually to tens to 100 kilo-ohms. At this time, there is water on the outer surface of the bottom of the battery pack 10 chassis, and the battery pack 10 can issue a warning to remind the battery pack 10 that there is water on the surface.

[0092] See also Figure 6 In some embodiments, the second detection line group 251 includes a third detection line 2511 and a fourth detection line 2512 that are spaced apart, the third detection line 2511 is connected to the second connection end 213 , and the fourth detection line 2512 is connected to the third connection end 252 .

[0093] In this way, when the second detection line group 251 is flooded, the third detection line 2511 and the fourth detection line 2512 will be immediately short-circuited by water to form a second signal, and transmitted to the detection unit 30 through the second connection end 213 and the third connection end 252, which is beneficial for the detection unit 30 to detect the second signal in time.

[0094] Specifically, in the embodiment of the present application, the third detection line 2511 and the fourth detection line 2512 are spaced apart, which is equivalent to a short circuit, and the resistance approaches infinity. When the water level is too high, the third detection line 2511 and the fourth detection line 2512 are both immersed in water. At this time, the third detection line 2511 and the fourth detection line 2512 are connected by water, and the electrical parameters will change.

[0095] The interval between the third detection line 2511 and the fourth detection line 2512 should not be too large to avoid failure to conduct the third detection line 2511 and the fourth detection line 2512 .

[0096] Optionally, the shape of the third detection line 2511 can be arranged in an O-shape, an E-shape, an S-shape, an M-shape, an H-shape, etc. This is arranged to facilitate the third detection line 2511 and the fourth detection line 2512 to be connected by water. Similarly, the shape of the fourth detection line 2512 can be arranged in an O-shape, an E-shape, an S-shape, an M-shape, an H-shape, etc. In the embodiment of the present application, the third detection line 2511 and the fourth detection line 2512 are arranged in an E-shape relative to each other.

[0097] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0099] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. An energy storage device (100), characterized in that: include: A battery pack (10), the battery pack (10) comprising a housing (11), the housing (11) having an opening (12); a waterproof plug (20), the waterproof plug (20) being configured to close the opening (12); A first detection element (21), the first detection element (21) being arranged in a gap between the waterproof plug (20) and the housing (11), the first detection element (21) being configured to generate a first signal in the event of water immersion; A detection unit (30), the detection unit (30) is configured to detect the first signal to determine that water has entered the gap.

2. The energy storage device (100) according to claim 1, characterized in that: The waterproof plug (20) comprises a sealing bottom plate (22) and a first connecting tube (23) extending from the sealing bottom plate (22) in a direction perpendicular to the sealing bottom plate (22); when the waterproof plug (20) is configured to close the opening (12), the first connecting tube (23) extends into the opening (12); and the first detecting member (21) is arranged at the connection between the sealing bottom plate (22) and the first connecting tube (23).

3. The energy storage device (100) according to claim 1, characterized in that: The battery pack (10) further comprises a connection terminal (13), wherein the connection terminal (13) is arranged at the opening (12), the connection terminal (13) is electrically connected to the detection unit (30), and when the waterproof plug (20) closes the opening (12), the first detection member (21) is electrically connected to the connection terminal (13).

4. The energy storage device (100) according to claim 3, characterized in that: The connecting terminal (13) comprises a first contact end (131) and a second contact end (132); the detecting unit (30) is connected to the first contact end (131) and the second contact end (132); the first detecting member (21) comprises a first detecting wire group (211), a first connecting end (212) and a second connecting end (213); the first connecting end (212) is connected to the second connecting end (213) via the first detecting wire group (211); when the waterproof plug (20) closes the opening (12), the first connecting end (212) is electrically connected to the first contact end (131), and the second connecting end (213) is electrically connected to the second contact end (132); the detecting unit (30) detects electrical parameters of the first detecting wire group (211) via the first contact end (131) and the second contact end (132) to detect the first signal.

5. The energy storage device (100) according to claim 4, characterized in that: The first detection line group (211) comprises a first detection line (2111) and a second detection line (2112) which are arranged at intervals, the first detection line (2111) is connected to the first connection end (212), and the second detection line (2113) is connected to the second connection end (213).

6. The energy storage device (100) according to claim 4, characterized in that: The electrical parameter includes any one or any combination of voltage, current or resistance value of the first detection line group (211).

7. The energy storage device (100) according to claim 3, characterized in that: The waterproof plug (20) further comprises a second detection member (25), the second detection member (25) being arranged on a surface of the waterproof plug (20) facing away from the battery pack (10), and when the waterproof plug (20) closes the opening (12), the second detection member (25) is electrically connected to the connection terminal (13), and the second detection member (25) is configured to generate a second signal in the case of water immersion, and the detection unit (30) is configured to detect the second signal to determine whether there is water on the bottom surface of the battery pack (10).

8. The energy storage device (100) according to claim 7, characterized in that: The connecting terminal (13) comprises a second contact terminal (132) and a third contact terminal (133); the detecting unit (30) is connected to the second contact terminal (132) and the third contact terminal (133); the second detecting member (25) comprises a second detecting wire group (251), a second connecting terminal (213) and a third connecting terminal (252); the second connecting terminal (213) is connected to the third connecting terminal (252) via the second detecting wire group (251); when the waterproof plug (20) closes the opening (12), the second connecting terminal (213) is electrically connected to the second contact terminal (132); the third connecting terminal (252) is electrically connected to the third contact terminal (133); the detecting unit (30) detects the electrical parameters of the second detecting wire group (251) via the second contact terminal (132) and the third contact terminal (133) to detect the second signal.

9. The energy storage device (100) according to claim 8, characterized in that: The electrical parameter includes any one or any combination of voltage, current or resistance value of the second detection line group (251).

10. The energy storage device (100) according to claim 8, characterized in that: The second detection line group (251) comprises a third detection line (2511) and a fourth detection line (2512) which are arranged at intervals, the third detection line (2511) is connected to the second connection end (213), and the fourth detection line (2512) is connected to the third connection end (252).

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