Energy storage device

Abstract

The utility model 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 technical field of energy storage, and more particularly, to an energy storage device. BACKGROUND

[0002] The energy storage device generally comprises a plurality of battery packs arranged in a stack. The bottom of the shell of each battery pack is usually formed with an opening and provided with a connecting terminal at the opening. During assembly, each battery pack is connected with the battery pack below through the connecting terminal, while the battery pack below seals the opening of the battery pack above, and the bottommost battery pack is sealed with a waterproof plug. However, when there is accumulated water on the ground where the energy storage device is arranged, due to the existence of the opening, the battery pack is prone to water ingress, especially when the water level submerges the waterproof plug of the bottommost battery pack, which is likely to damage the energy storage device or cause safety accidents. CONTENT OF THE UTILITY MODEL

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

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

[0005] a battery pack, the battery pack comprising a shell, the shell being formed with an opening;

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

[0007] a first detection member arranged at a gap between the waterproof plug and the shell, the first detection member being configured to form a first signal in the case of water immersion;

[0008] a detection unit configured to detect the first signal to determine whether the gap is waterlogged.

[0009] The energy storage device provided by the present application sets the first detection member through the gap between the waterproof plug and the shell, and can form a first signal in the case of water immersion of the first detection member. At the same time, the detection unit is used to detect the first signal to determine whether the gap is waterlogged. If the gap is waterlogged, it is likely to enter the inside of the shell of the battery pack and cause circuit damage. Through detection, early warning and early treatment can be achieved to prevent damage from expanding or even occurring. In addition, the waterproof plug has a small volume and a simple structure, which is conducive to reducing the production cost of the energy storage device.

[0010] In some embodiments, the waterproof plug comprises a sealing bottom plate and a first connecting cylinder extending from the sealing bottom plate in a direction perpendicular to the sealing bottom plate. When the waterproof plug is configured to close the opening, the first connecting cylinder extends into the opening, and the first detection member is arranged at the connection between the sealing bottom plate and the first connecting cylinder.

[0011] Therefore, the first detection member arranged at the connection position of the sealing bottom plate and the first connecting barrel can identify the water leakage in advance before the water completely enters the battery pack, thereby improving the reliability of the energy storage device.

[0012] In some embodiments, the battery pack further comprises a connecting terminal arranged at the opening, the connecting terminal being electrically connected with the detection unit, and the first detection member being electrically connected with the connecting terminal when the waterproof plug seals the opening.

[0013] Therefore, the first detection member and the detection unit are connected through the connecting terminal, thereby reducing the connection difficulty of the first detection member and the detection unit.

[0014] In some embodiments, the connecting terminal comprises a first contact end and a second contact end, the detection unit is connected with the first contact end and the second contact end, the first detection member comprises a first detection line group, a first connecting end and a second connecting end, the first connecting end is connected with the second connecting end through the first detection line group, the first connecting end is electrically connected with the first contact end and the second connecting end is electrically connected with the second contact end when the waterproof plug seals the opening, and the detection unit detects the electrical parameter of the first detection line group through the first contact end and the second contact end to detect the first signal.

[0015] Therefore, the detection unit is electrically connected with the first detection member through the first contact end, the second contact end, the first connecting end and the second connecting end, and detects the electrical parameter of the first detection line group, so that the detection unit can detect whether the battery pack leaks at the opening by detecting the change of the electrical parameter of the first detection line group.

[0016] In some embodiments, the first detection line group comprises a first detection line and a second detection line arranged at intervals, the first detection line is connected with the first connecting end, and the second detection line is connected with the second connecting end.

[0017] Therefore, when the first detection member is immersed in water, the first detection line and the second detection line will be immediately short-circuited by water to form the first signal, and the first signal is transmitted to the detection unit through the first connecting end and the second connecting end, thereby facilitating the detection unit to detect the first signal in time.

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

[0019] Therefore, the parameter for detecting the first signal can be flexibly selected according to the actual situation to facilitate the test or be more accurate.

[0020] In some embodiments, the waterproof plug further comprises a second detection member disposed on a surface of the waterproof plug away from the battery pack, the second detection member is electrically connected with the connection terminal when the waterproof plug seals the opening, 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 the bottom surface of the battery pack has water.

[0021] In this way, whether the bottom surface of the battery pack has water can be determined through the second signal generated when the second detection member is immersed in water, which is conducive to obtaining information in advance when water accumulation occurs, so as to make preparations in advance to avoid water entering the battery pack.

[0022] In some embodiments, the connection terminal comprises a second contact end and a third contact end, the detection unit is connected with the second contact end and the third contact end, the second detection member comprises a second detection line group, a second connection end and a third connection end, the second connection end is connected with the third connection end through the second detection line group, the second connection end is electrically connected with the second contact end and the third connection end is electrically connected with the third contact end when the waterproof plug seals the opening, and the detection unit detects the electrical parameter 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 realizes electrical connection with the second detection line group through the second contact end, the third contact end, the second connection end and the third connection end, and realizes detection of the electrical parameter of the second water immersion detection line, so that the detection unit can detect whether the bottom of the battery pack has water accumulation by detecting the change of the electrical parameter of the second water immersion detection line.

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

[0025] In this way, the parameter for detecting the second signal can be flexibly selected according to actual conditions to facilitate testing or be more accurate.

[0026] In some embodiments, the second detection line group comprises a third detection line and a fourth detection line disposed at intervals, the third detection line is connected with the second connection end, and the fourth detection line is connected with the third connection end.

[0027] In this way, when the second detection line group is immersed in water, the third detection line and the fourth detection line will be immediately short-circuited by water to form the second signal, and the second signal is transmitted to the detection unit through the second connection end and the third connection end, which is conducive to the detection unit detecting the second signal in time.

[0028] Additional aspects and advantages of the embodiments of the present application will be set forth in part in the description which follows, and in part will be obvious from the description, or can be learned by practice of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0031] Figure 2 is a structural schematic diagram of a waterproof plug of an energy storage device of an embodiment of the present application;

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

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

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

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

[0036] Main element symbol explanation: energy storage device 100, battery pack 10, shell 11, opening 12, connection 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 connection cylinder 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] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which like or similar elements are denoted by the same or similar reference signs, and examples of the embodiments are shown in the drawings. The embodiments described below are examples for explaining the present application, and are merely intended to explain the present application, and should not be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0038] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected. It can be a mechanical connection, or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise explicitly specified and limited, "on" or "under" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0040] The disclosure herein provides many different embodiments or examples for implementing different structures of the present application. For the purpose of simplicity, the components and arrangements of the various examples are shown in block diagram form. It will be well understood by those having ordinary skill in the art that these are examples only and that the right of the present application is not limited to the details of the arrangements shown. In addition, the present application can repeat reference numerals and / or letters in various examples and / or throughout the specification and drawings. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and / or configurations discussed. Moreover, the present application provides various examples of specific processes and materials. However, one skilled in the art will appreciate that the application is not limited to these specific processes and / or materials.

[0041] The energy storage device generally comprises a plurality of battery packs arranged in a stack. The bottom of the shell of each battery pack is usually formed with an opening and provided with a connecting terminal at the opening. When assembled, each battery pack is connected to the battery pack below through the connecting terminal, while the battery pack below seals the opening of the battery pack above, and the bottommost battery pack is sealed with a waterproof plug. However, when there is accumulated water on the ground where the energy storage device is arranged, due to the presence of the opening, the battery pack is prone to water ingress, especially when the water level overflows the waterproof plug of the bottommost battery pack, which can damage the energy storage device or cause safety accidents.

[0042] Please refer to Figure 1 The energy storage device 100 of the present application comprises a battery pack 10, a waterproof plug 20, a first detection member 21 and a detection unit 30. The battery pack 10 comprises a shell 11, and the shell 11 is provided with an opening 12. The waterproof plug 20 is configured to close the opening 12. The first detection member 21 is arranged in a gap between the waterproof plug 20 and the shell 11, and the first detection member 21 is configured to form a first signal in the case of water immersion. The detection unit 30 is configured to detect the first signal to determine whether the gap is waterlogged.

[0043] The energy storage device 100 of the present application is provided with the first detection member 21 through the gap between the waterproof plug 20 and the shell 11, and the first detection member 21 can form a first signal in the case of water immersion. At the same time, the detection unit 30 is used to detect the first signal to determine whether the gap is waterlogged. If the gap is waterlogged, it is possible that water will enter the inside of the shell 11 of the battery pack 10 and cause circuit damage. By detecting in advance, the damage can be prevented from expanding or even 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] Specifically, please refer to Figures 1 to 6The energy storage device 100 refers to a device capable of storing electrical energy or other forms of energy and releasing it to supply the power system or other devices when needed. In the embodiments of the present application, the energy storage device 100 refers to a portable energy storage device 100 for home use, which generally 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 specifically can include an energy storage all-in-one machine and at least one power-up pack. The energy storage all-in-one machine mainly includes an inverter and a battery module inside, and the power-up pack mainly includes a battery module. After the energy storage all-in-one machine and the at least one power-up pack are stacked and connected through respective connection terminals 13, conduction and signal transmission can be realized between the all-in-one machine and the power-up pack, thereby realizing the capacity expansion of the battery of the energy storage device 100.

[0045] The battery pack 10 is the core part of the energy storage device 100, responsible for the storage and release of electrical energy. In order to improve the storage capacity, the number of battery packs 10 is generally multiple, and each battery pack 10 generally includes components such as a battery management system (BMS).

[0046] The shell 11 of the battery pack 10 is usually a plastic shell 11 formed by injection molding. The shell 11 is provided with a handle on both sides along the height direction for carrying and moving the battery pack 10. The bottom of the shell 11 is provided with a support foot for supporting the shell 11. When the battery pack 10 is used alone, the support foot can elevate the battery pack 10, thereby achieving a certain waterproof effect. Correspondingly, the top of the shell 11 has a receiving groove for accommodating the support foot. When multiple battery packs 10 are stacked together, the support feet can be placed in the receiving grooves, so that the contact area of the shells 11 of adjacent battery packs 10 is larger, thereby dispersing the pressure and making the stacking more secure. In addition, since the opening 12 is usually provided at the bottom, the close fit of the shell 11 can also achieve sealing at the opening 12. The shell 11 is thus arranged to connect multiple battery packs 10 in the form of building blocks, which facilitates the user to reduce or expand the number of battery packs 10 according to the needs.

[0047] In the embodiments of the present application, the waterproof plug 20 is used to cover the opening 12 of the shell 11. When the waterproof plug 20 covers the opening 12, it is attached to the shell 11, thereby forming a gap between the waterproof plug 20 and the shell 11. The first detection member 21 is arranged in the gap. When the water at the bottom of the battery pack 10 seeps into the gap, the first detection member 21 is immersed in water and generates a first signal which is 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 too much water from seeping in.

[0048] Further, in the embodiments of the present application, the first detection member 21 is arranged on the waterproof plug 20, and specifically, the first detection member 21 is arranged on the surface of the waterproof plug 20 close to the shell 11, and the detection unit 30 is arranged in the battery pack 10.

[0049] In some embodiments, the first detection member 21 can also be arranged on the surface of the shell 11 close to the waterproof plug 20.

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

[0051] In this way, the first detection member 21 arranged at the connection between the sealing bottom plate 22 and the first connecting cylinder 23 can be identified in advance before water completely enters the battery pack 10, which is beneficial to improve the reliability of the energy storage device 100.

[0052] Specifically, in the embodiments of the present application, the sealing bottom plate 22 and the first connecting cylinder 23 are an integrated structure integrally processed and formed, and the first connecting cylinder 23 is arranged at the middle part of the sealing bottom plate 22. The sealing bottom plate 22 can be made of the same material as the shell 11. The side of the sealing bottom plate 22 away from the first connecting cylinder 23 is provided with a groove corresponding to the position of the first connecting cylinder 23, so as to prevent defects such as shrinkage holes and stress concentration from being formed at this position during injection molding.

[0053] The shell 11 is internally provided with a second connecting cylinder, and the second connecting cylinder is arranged around the opening 12, and the first connecting cylinder 23 extends upward from the sealing bottom plate 22 through the opening 12 and cooperates with the second connecting cylinder.

[0054] Further, the first detection member 21 is arranged on the sealing bottom plate 22, the first detection member 21 is annular, and the first detection member 21 is arranged around the first connecting cylinder 23 near the connection between the sealing bottom plate 22 and the first connecting cylinder 23.

[0055] In other embodiments, the first connecting member can also be arranged on the outer surface of the first connecting cylinder 23 or the inner surface of the second connecting cylinder.

[0056] In the embodiments of the present application, the first connecting cylinder 23 is further provided with an elastic member 24 on the outer surface, and the first connecting cylinder 23 is connected with the second connecting cylinder in interference fit through the elastic member 24.

[0057] The elastic member 24 is in a cylindrical 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 is elastically deformed, and the two sides thereof abut against the inner wall of the second connecting cylinder and the outer wall of the first connecting cylinder 23 respectively, so that the opening 12 is sealed. In addition, the frictional 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, so that the waterproof plug 20 is not easily detached.

[0058] Optionally, the material of the elastic member 24 can be rubber, silica gel, elastic plastic or other materials with certain elasticity.

[0059] Please refer to Figures 2 to 4 In some embodiments, the battery pack 10 further includes a connecting terminal 13, which is arranged in the opening 12 and is electrically connected with the detection unit 30. When the waterproof plug 20 seals the opening 12, the first detection member 21 is electrically connected with the connecting terminal 13.

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

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

[0062] Further, the connecting terminal 13 is also used for communication between other battery packs 10. Since the opening 12 is usually arranged at the bottom, the connecting terminal 13 is usually located at the bottom of the battery pack 10, and correspondingly, a connecting plug is arranged at the top of the battery pack 10. When two battery packs 10 are stacked with each other, the connecting plug of the battery pack 10 at the bottom is inserted into the opening 12 of the battery pack 10 at the top and is electrically connected with the connecting terminal 13, so as to realize the communication between the two battery packs 10.

[0063] In other embodiments, the connecting terminal 13 can also be arranged at the top of the battery pack 10, and the connecting plug can be arranged at the bottom of the battery pack 10. At this time, the waterproof plug 20 is used for connecting and sealing the connecting plug.

[0064] Please refer to Figure 5In some embodiments, the connecting terminal 13 includes a first contact end 131 and a second contact end 132, the detection unit 30 is connected with the first contact end 131 and the second contact end 132, the first detection member 21 includes a first detection line group 211, a first connecting end 212 and a second connecting end 213, the first connecting end 212 is connected with the second connecting end 213 through the first detection line group 211, when the waterproof plug 20 seals the opening 12, the first connecting end 212 is electrically connected with the first contact end 131, and the second connecting end 213 is electrically connected with the second contact end 132, and the detection unit 30 detects the electrical parameter of the first detection line group 211 through the first contact end 131 and the second contact end 132 to detect the first signal.

[0065] In this way, the detection unit 30 realizes the electrical connection with the first detection member 21 through the first contact end 131, the second contact end 132, the first connecting end 212 and the second connecting end 213, and realizes the detection of the electrical parameter of the first detection line group 211, and the detection unit 30 can detect whether the battery pack 10 leaks water at the opening 12 by detecting the change of the electrical parameter of the first detection line group 211.

[0066] Specifically, in the embodiments of the present application, the electrical parameter of the first detection line group 211 changes when water immersion occurs, and the detection unit 30 detects the electrical parameter of the first detection line group 211 through the first contact end 131 and the second contact end 132 to detect the first signal.

[0067] Further, in the embodiments of the present application, the first contact end 131 and the second contact end 132 of the connecting terminal 13 can be needle seats, and the first connecting end 212 and the second connecting end 213 of the first detection member 21 can be signal needles, when the waterproof plug 20 seals the opening 12, the signal needles of the first detection member 21 are inserted into the needle seats of the connecting terminal 13, so as to realize the electrical connection between the first detection member 21 and the connecting terminal 13.

[0068] In other embodiments, the first contact end 131 and the second contact end 132 of the connecting terminal 13 can be signal needles, and the first connecting end 212 and the second connecting end 213 of the first detection member 21 can be needle seats.

[0069] In some embodiments, the first detection line group 211 includes a first detection line 2111 and a second detection line 2112 arranged at intervals, the first detection line 2111 is connected with the first connecting end 212, and the second detection line 2112 is connected with the second connecting end 213.

[0070] Thus, when the first detection piece 21 is immersed in water, the first detection line 2111 and the second detection line 2112 are immediately short-circuited by water to form the first signal, which is transmitted to the detection unit 30 through the first connecting end 212 and the second connecting end 213, so that the detection unit 30 can 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 arranged at intervals, which is equivalent to a break, and the resistance tends to be infinite. When the water level is too high, the first detection line 2111 and the second detection line 2112 are both immersed in water, and the first detection line 2111 and the second detection line 2112 are connected by water, so that the electrical parameter changes.

[0072] The interval between the first detection line 2111 and the second detection line 2112 should not be too large, so as to avoid that the first detection line 2111 and the second detection line 2112 cannot be turned on.

[0073] Alternatively, the shape of the first detection line 2111 can be arranged as O-shaped, E-shaped, S-shaped, M-shaped, H-shaped, etc. Such arrangement is to facilitate the first detection line 2111 and the second detection line 2112 to be turned on by water. Similarly, the shape of the second detection line 2112 can be arranged as O-shaped, E-shaped, S-shaped, M-shaped, H-shaped, 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 cylinder 23. 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 multiple of the voltage, the current or the resistance value of the first detection line group 211.

[0075] Thus, the parameter for detecting the first signal can be flexibly selected according to the actual situation.

[0076] Specifically, compared with the voltage and the current, the resistance of the first detection line group 211 changes more obviously and is more convenient to measure. Therefore, in the embodiment of the present application, the electrical parameter is 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 the resistance is usually greater than 1000 kΩ. When water enters the gap between the waterproof plug 20 and the shell 11, i.e. the inside of the battery pack 10, the first detection line 2111 and the second detection line 2112 inside the gap are connected by water, so that the resistance of the first detection line group 211 becomes smaller, usually tens to 100 kΩ. At this time, the battery pack 10 starts to enter water or has water inside, and the battery pack 10 can be alarmed or protected, for example, an alarm is sent and power is cut off in time.

[0079] Please refer to Figure 2 、 Figure 5 and Figure 6 In some embodiments, the waterproof plug 20 further comprises a second detection member 25, the second detection member 25 is arranged on the surface of the waterproof plug 20 away from the battery pack 10, and the second detection member 25 is electrically connected with the connecting terminal 13 when the waterproof plug 20 seals the opening 12, and the second detection member 25 is configured to form 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 surface 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, which is beneficial to obtaining information in advance when water accumulation occurs, so as to make preparations in advance to avoid water entering the battery pack 10.

[0081] Specifically, in the embodiments of the present application, the second detection member 25 is arranged on the surface of the sealing bottom plate 22 away from the shell 11, when water accumulation occurs on the bottom surface of the battery pack 10 and the water level rises, the water accumulation will first contact the second detection member 25 to cause the second detection member 25 to be immersed in water, so that the detection unit 30 detects that there is water on the bottom surface and sends a first warning to inform the user that water has contacted the bottom of the battery pack 10 and is about to enter the inside of the battery pack 10. If the water level continues to rise, the first detection member 21 will be contacted, causing the first detection member 21 to be immersed in water, so that the detection unit 30 detects that the gap is waterlogged and sends a second warning to inform the user that water has started to enter the inside of the battery pack 10 and should be handled in time.

[0082] Please refer to Figure 5In some embodiments, the connection terminal 13 includes a second contact end 132 and a third contact end 133, the detection unit 30 is connected with the second contact end 132 and the third contact end 133, the second detection member 25 includes a second detection line group 251, a second connection end 213 and a third connection end 252, the second connection end 213 is connected with the third connection end 252 through the second detection line group 251, when the waterproof plug 20 seals the opening 12, the second connection end 213 is electrically connected with the second contact end 132, and the third connection end 252 is electrically connected with the third contact end 133, and the detection unit 30 detects the electrical parameter of the second detection line group 251 through the second contact end 132 and the third contact end 133 to detect the second signal.

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

[0084] Specifically, in the embodiments of the present application, the electrical parameter of the second detection line group 251 changes when water immersion occurs, and the detection unit 30 detects the electrical parameter of the second detection line group 251 through the second contact end 132 and the third contact end 133 to detect the second signal.

[0085] Further, in the embodiments of the present application, the second contact end 132 and the third contact end 133 of the connection terminal 13 can be needle seats, and the second connection end 213 and the third connection end 252 of the second detection member 25 can be signal needles, when the waterproof plug 20 seals the opening 12, the signal needles of the second detection member 25 are inserted into the needle seats of the connection terminal 13, so that the electrical connection between the second detection member 25 and the connection terminal 13 is realized.

[0086] In other embodiments, the second contact end 132 and the third contact end 133 of the connection terminal 13 can be signal needles, and the second connection end 213 and the third connection end 252 of the first detection member 21 can be needle seats.

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

[0088] In this way, the parameters for convenient testing or more accurate detection of the second signal can be flexibly selected according to actual conditions.

[0089] Specifically, compared with voltage and current, the resistance change of the second detection line group 251 is more obvious and more convenient to measure, and therefore, in the embodiments of the present application, the electrical parameter is 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 kΩ; when water contacts the outer surface of the bottom of the battery pack 10, the second detection line group 251 is immersed by water, so that the resistance of the second detection line group 251 becomes smaller, usually tens to 100 kΩ, at this time, the outer surface of the bottom of the battery pack 10 has water, and the battery pack 10 can issue a warning to remind that there is water on the outer surface of the battery pack 10.

[0092] Please refer to Figure 6 In some embodiments, the second detection line group 251 includes a third detection line 2511 and a fourth detection line 2512 arranged at intervals, the third detection line 2511 is connected with the second connection end 213, and the fourth detection line 2512 is connected with the third connection end 252.

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

[0094] Specifically, in the embodiment of the application, the third detection line 2511 and the fourth detection line 2512 are arranged at intervals, which is equivalent to a break, and the resistance tends to 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 parameter will change.

[0095] The interval between the third detection line 2511 and the fourth detection line 2512 should not be too large, so as to avoid that the third detection line 2511 and the fourth detection line 2512 cannot be turned on.

[0096] Optionally, the shape of the third detection line 2511 can be arranged as O-shaped, E-shaped, S-shaped, M-shaped, H-shaped, etc. Such arrangement is to make the third detection line 2511 and the fourth detection line 2512 be turned on by water more easily. Similarly, the shape of the fourth detection line 2512 can be arranged as O-shaped, E-shaped, S-shaped, M-shaped, H-shaped, etc. In the embodiment of the application, the third detection line 2511 and the fourth detection line 2512 are relatively arranged in E-shaped.

[0097] In the description of the application, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearance of the above terms in various places in the description are not necessarily intended to refer to the same embodiment or example. Moreover, the particular features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0098] Furthermore, the terms "first", "second" or the like are used merely to describe corresponding features, and do not imply or connote relative importance or a quantity of the specified technical features. Thus, a feature defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the application, the meaning of "plurality" is at least two, for example two, three, unless otherwise explicitly and specifically limited.

[0099] Although the embodiments of the application have been shown and described above, it is to be understood that the above-described embodiments are merely exemplary, and are not to be taken as limiting the present application. Within the scope of the present application, various changes, modifications, substitutions and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present application, which are defined by the claims and their equivalents.

Claims

1. An energy storage device (100), characterized by, The application relates to a battery pack (10) comprising: a battery pack (10) comprising a housing (11) with an opening (12) formed therein; a waterproof plug (20) configured to seal the opening (12); a first detection member (21) arranged in a gap between the waterproof plug (20) and the housing (11), the first detection member (21) being configured to form a first signal in the case of water immersion; a detection unit (30) configured to detect the first signal to determine whether water enters 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 cylinder (23) extending from the sealing bottom plate (22) in a direction perpendicular to the sealing bottom plate (22), the first connecting cylinder (23) extending into the opening (12) when the waterproof plug (20) is configured to seal the opening (12), and the first detection member (21) is arranged at a connection between the sealing bottom plate (22) and the first connecting cylinder (23).

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

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 detection unit (30) is connected to the first contact end (131) and the second contact end (132), the first detection member (21) comprises a first detection line 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) through the first detection line group (211), 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) when the waterproof plug (20) seals the opening (12), and the detection unit (30) detects an electrical parameter of the first detection line group (211) through 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) arranged at intervals, the first detection line (2111) is connected to the first connecting end (212), and the second detection line (2112) is connected to the second connecting end (213).

6. The energy storage device (100) according to claim 4, characterized in that The electrical parameter comprises 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 piece (25) arranged on a surface of the waterproof plug (20) away from the battery pack (10), the second detection piece (25) is electrically connected with the connecting terminal (13) when the waterproof plug (20) seals the opening (12), the second detection piece (25) is configured to form a second signal in the case of water immersion, and the detection unit (30) is configured to detect the second signal to determine that the bottom surface of the battery pack (10) has water.

8. The energy storage device (100) according to claim 7, characterized in that The connecting terminal (13) comprises a second contact end (132) and a third contact end (133), the detection unit (30) is connected with the second contact end (132) and the third contact end (133), the second detection piece (25) comprises a second detection line group (251), a second connecting end (213) and a third connecting end (252), the second connecting end (213) is connected with the third connecting end (252) through the second detection line group (251), the second connecting end (213) is electrically connected with the second contact end (132) and the third connecting end (252) is electrically connected with the third contact end (133) in the case that the waterproof plug (20) seals the opening (12), and the detection unit (30) detects the electrical parameter of the second detection line group (251) through the second contact end (132) and the third contact end (133) to detect the second signal.

9. The energy storage device (100) according to claim 8, characterized in that The electrical parameter comprises 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) arranged at intervals, the third detection line (2511) is connected with the second connecting end (213), and the fourth detection line (2512) is connected with the third connecting end (252).

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