Energy storage equipment

Abstract

The present invention discloses an energy storage device. The energy storage device includes a battery pack, a closure and a short circuit detection unit. The battery pack includes a shell and a connecting terminal, the shell has an opening, and the connecting terminal is arranged at the opening. The closure includes an electrical connector and a short circuit detection unit, and when the closure closes the opening, the electrical connector is connected to the connecting terminal to form a first signal. The short circuit detection unit is configured to detect the first signal to determine that the battery pack is located at the bottom. The above-mentioned energy storage device is connected to the connecting terminal through the electrical connector to form a first signal, and the first signal is detected by the short circuit detection unit to determine that the battery pack is located at the bottom, thereby determining the communication address of the battery pack, thereby realizing address identification of the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and in particular to an energy storage device. Background Art

[0002] The energy storage device includes multiple stacked battery packs. When multiple battery packs communicate, they need to be identified according to different addresses. For example, the top battery pack is the first one, and the communication addresses of the battery packs increase by 1 from top to bottom. The address of the battery pack at the bottom does not increase. The upper battery pack can be connected through the lower battery pack to achieve address recognition. However, there is no battery pack under the bottom battery pack, so the bottom battery pack cannot be identified. Summary of the invention

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

[0004] An energy storage device according to an embodiment of the present invention includes a battery pack, a sealing member, and a short circuit detection unit.

[0005] The battery pack includes a housing and a connection terminal, the housing has an opening, and the connection terminal is arranged at the opening. The closure member includes an electrical connection member, and when the closure member closes the opening, the electrical connection member is connected to the connection terminal to form a first signal. The short circuit detection unit is configured to detect the first signal to determine that the battery pack is located at the bottom.

[0006] The energy storage device is connected to the connection terminal via an electrical connector to form a first signal, and the short circuit detection unit detects the first signal to determine that the battery pack is located at the bottom, thereby determining the communication address of the battery pack, thereby realizing address identification of the battery pack.

[0007] In some embodiments, the short circuit detection unit is disposed on the closure member.

[0008] In some embodiments, the connection terminal includes a first connection terminal and a second connection terminal, the first connection terminal is connected to the positive terminal of the power supply, and the second connection terminal is connected to the negative terminal of the power supply through a first resistor. The electrical connector includes a fourth connection terminal and a fifth connection terminal, and the fourth connection terminal is connected to the fifth connection terminal through a second resistor. When the closing member closes the opening, the fourth connection terminal is electrically connected to the first connection terminal, the fifth connection terminal is electrically connected to the second connection terminal, and the short detection unit detects the first signal by detecting the level of the fifth connection terminal.

[0009] In some embodiments, the energy storage device includes a water immersion detection unit and a water immersion detection component, the water immersion detection unit is electrically connected to the water immersion detection component, and when the closing component closes the opening and the closing component is immersed in water, the water immersion detection unit is configured to detect a second signal emitted by the water immersion detection component to determine whether the closing component is immersed in water, and when water immersion is detected, control the electrical connection component to emit a water immersion alarm signal.

[0010] In some embodiments, the water immersion detection unit and the water immersion detection member are disposed on the sealing member.

[0011] In some embodiments, the connection terminal includes a first connection terminal, a second connection terminal and a third connection terminal, the first connection terminal is connected to the positive terminal of a power supply, the second connection terminal is connected to the negative terminal of a power supply through a first resistor, and the third connection terminal is connected to the negative terminal of the power supply; the electrical connector includes a fourth connection terminal, a fifth connection terminal and a sixth connection terminal; when the closing member closes the opening, the fourth connection terminal is electrically connected to the first connection terminal as the positive terminal of the power supply of the water immersion detection unit, the sixth connection terminal is electrically connected to the third connection terminal as the negative terminal of the power supply of the water immersion detection unit, the fifth connection terminal is electrically connected to the second connection terminal, and the fifth connection terminal is configured to receive a control instruction of the water immersion detection unit to send a water immersion alarm signal.

[0012] In some embodiments, the water immersion detection component is disposed on the bottom plate of the sealing component, and the water immersion detection component includes two conductive wires, and the conductive wires are bent and disposed on a surface of the bottom plate away from the battery pack.

[0013] In some embodiments, the battery pack includes an identification unit configured to determine that the battery pack is in a non-short-circuited state when the potential of the second connection terminal is a third signal.

[0014] In some embodiments, the connecting terminal includes a first connecting portion, the closing member includes a second connecting portion and a base plate, the second connecting portion is formed on the base plate, the second connecting portion extends into the opening and cooperates with the first connecting portion, and the base plate seals the opening in the housing.

[0015] In some embodiments, the connecting terminal includes a terminal base, which includes a first connecting cylinder; the closing piece includes a second connecting cylinder, which extends upward from the bottom plate and cooperates with the opening and the first connecting cylinder; the first connecting portion includes an inner wall of the first connecting cylinder, and the second connecting portion includes an elastic member sleeved on the second connecting cylinder; the closing piece and the connecting terminal are connected by interference fit between the elastic member and the first connecting cylinder.

[0016] In some embodiments, the elastic member includes a plurality of inverted rings, and the plurality of inverted rings are arranged along the axial direction of the second connecting tube.

[0017] In certain embodiments, the closure includes a sealing gasket located on the base plate, the sealing gasket being located between the housing and the base plate.

[0018] In some embodiments, the battery pack includes a plurality of battery packs, the battery packs are stacked, each of the battery packs is connected to the battery pack below via the connecting terminal, and the battery pack at the bottom is connected to the closure member.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a front view of an energy storage device according to an embodiment of the present invention;

[0022] Figure 2 is a bottom view of an energy storage device according to an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 The enlarged schematic diagram of part III;

[0024] Figure 4 is a bottom view of a battery pack according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of a module of an energy storage device according to an embodiment of the present invention;

[0026] Figure 6 and Figure 7 is a circuit diagram of an energy storage device according to an embodiment of the present invention;

[0027] Figure 8 is a side view of an energy storage device according to an embodiment of the present invention;

[0028] Fig. 9 yes Figure 8 Sectional view along line AA;

[0029] Fig.10 yes Fig. 9 The enlarged schematic diagram of the middle part X;

[0030] Fig.11 is a three-dimensional schematic diagram of a closure member according to an embodiment of the present invention;

[0031] Fig.12 1 is a front view of a closure member according to an embodiment of the present invention.

[0032] Description of main component symbols:

[0033] Battery pack 10, housing 11, opening 110, connection terminal 12, first connection end 121, second connection end 122, third connection end 123, first connection portion 13, terminal base 124, first connection cylinder 1241, inner wall 1242 of first connection cylinder, positive power supply terminal 14, first resistor 15, negative power supply terminal 16, identification unit 18;

[0034] Closing member 20, electrical connector 21, fourth connection end 211, fifth connection end 212, third connection end 213, second resistor 24, second connection portion 26, sealing gasket 27, bottom plate 28, warping edge 281, second connection tube 29, elastic member 291, undercut ring 2911;

[0035] Short circuit detection unit 30, water immersion detection unit 31, water immersion detection element 32, conductive wire 321;

[0036] Energy storage device 100. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having 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.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In the related art, when multiple battery packs communicate, they need to be identified according to different addresses. For example, the top battery pack is the first one, and the communication addresses of the battery packs increase by 1 from top to bottom. The address of the battery pack at the bottom no longer increases. The upper battery pack can be connected through the lower battery pack to achieve address recognition. However, there is no battery pack under the bottom battery pack, so the bottom battery pack cannot be identified.

[0043] See also Figures 1 to 5 An energy storage device 100 provided in an embodiment of the present invention includes a battery pack 10 , a sealing member 20 and a short circuit detection unit 30 .

[0044] In some embodiments, Figure 1As shown, the energy storage device 100 provided in the present application can be a balcony photovoltaic energy storage device. The balcony photovoltaic energy storage device is relatively small and easy to carry and move. It can be moved according to the user's electricity demand, such as from a balcony to a garage or even outdoors.

[0045] The battery pack 10 includes a shell 11 and a connecting terminal 12. The shell 11 has an opening 110. The connecting terminal 12 is arranged in the opening 110. The closure 20 includes an electrical connector 21. When the closure 20 closes the opening 110, the electrical connector 21 is connected to the connecting terminal 12 to form a first signal. The short circuit detection unit 30 is configured to detect the first signal to determine that the battery pack 10 is located at the bottom.

[0046] For the energy storage device 100, when the closure member 20 is installed in the opening 110, the electrical connector 21 is connected to the connection terminal 12 to form a first signal. The short circuit detection unit 30 detects the first signal to determine that the battery pack 10 is located at the bottom, thereby determining the communication address of the battery pack 10, thereby realizing address recognition of the battery pack 10.

[0047] Specifically, 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 home use. The energy storage device 100 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 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, such as Figure 1 As shown, after the energy storage integrated machine and at least one power pack are stacked, they are connected through their respective connection terminals 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.

[0048] The functional module is responsible for monitoring, managing and controlling the battery status, current, voltage and other parameters of the battery pack 10. Furthermore, by introducing advanced technologies such as artificial intelligence and big data, the operation strategy of the energy storage device 100 can be optimized to improve energy utilization efficiency and system stability.

[0049] The battery pack 10 is the core part of the energy storage device 100, responsible for the storage and release of electric energy. In order to improve the storage capacity and the flexibility of the use of the energy storage device 100, the number of battery packs 10 is generally multiple, generally composed of a main battery pack 10 and a power-up battery pack 10, each battery pack 10 includes components such as a battery management system (BMS).

[0050] When using the energy storage device 100 , the main battery pack 10 may be used alone, or a power-up pack may be added to the main battery pack 10 to increase the amount of stored power and the flexibility of use of the energy storage device 100 .

[0051] like Figure 1 As described above, the shell 11 of the battery pack 10 is collectively referred to as an injection-molded plastic shell 11. Handles for carrying and moving the battery pack 10 are provided on both sides of the shell 11 in the height direction. Support feet for supporting the shell 11 are provided at the bottom of the 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 at the top of the 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 shells 11 of adjacent battery packs 10 larger, which can disperse the pressure and make the stacking more secure. In addition, since the opening 110 is usually provided at the bottom, the close fit of the shell 11 can also achieve sealing at the opening 110. The 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.

[0052] Since the opening 110 is usually arranged at the bottom, the connection terminal 12 is usually located at the bottom of the battery pack 10, and correspondingly, a connection plug is arranged 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 110 of the top battery pack 10 and electrically connected to the connection terminal 12, so that the two battery packs 10 can communicate with each other.

[0053] In other embodiments, the connection terminal 12 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 sealing member 20 is used to connect with the connection plug and seal the connection plug.

[0054] When multiple battery packs 10 communicate with each other, it is first necessary to determine the communication address of each battery pack 10. In the energy storage device 100 of the embodiment of the present invention, an electrical connector 21 is provided on the closure 20. When the closure 20 closes the opening 110 of the battery pack 10 at the bottom of the energy storage device 100, the electrical connector 21 is connected to the connection terminal 12 to form a first signal. When the short circuit detection unit 30 detects the first signal, it can determine the communication address of the battery pack 10 located at the bottom of the energy storage device 100. Therefore, by using the closure 20 to close the opening 110 of the bottom battery pack 10, the communication address of each battery pack 10 in the energy storage device 100 is determined.

[0055] Multiple battery packs 10 are stacked, and the stacked battery packs 10 communicate with each other and are identified according to different addresses. For example, the topmost battery pack 10 is the first, and the address increases by 1 from top to bottom, and the one at the bottom is the last; the short-circuit detection unit 30 can identify the first signal of the electrical connector 21 short-circuiting the connection terminal 12. Since only the bottommost battery pack 10 is short-circuited, if the battery pack 10 does not generate the first signal, it is not the bottommost battery pack 10, and it needs to continue to increase by 1; if the battery pack 10 generates the first signal, the short-circuit detection unit 30 identifies the signal and determines that it is the last battery pack 10. At this time, the address no longer increases, and the address of the last battery pack 10 is used to determine the number of battery packs 10.

[0056] Furthermore, since the closure member 20 is small in size, after being installed in the energy storage device 100, it basically does not affect the volume and weight of the energy storage device 100. At the same time, the energy storage device 100 can select the number of battery packs 10 (power packs) as needed. Therefore, regardless of whether the number of battery packs 10 of the energy storage device 100 increases or decreases, the above-mentioned function can be achieved by simply installing the closure member 20 in the opening 110 of the battery pack 10 at the bottom layer, thereby improving the ease of use of the energy storage device 100.

[0057] It should be noted that the closure 20 is used to be arranged at the opening 110 of the bottom battery pack 10 of the energy storage device 100. In the case where the energy storage device 100 has only one battery pack 10, the battery pack 10 is the bottom battery pack 10 of the energy storage device 100. The closure 20 closes its opening 110 to determine the communication address, and the energy storage device 100 can be used to communicate with the user's mobile terminal, or can be used to communicate with the user's energy management system.

[0058] In the case where the energy storage device 100 has only a plurality of battery packs 10, the closure 20 is disposed at the opening 110 of the bottommost battery pack 10 of the energy storage device 100. At this time, after the closure 20 closes its opening 110, the communication address of each battery pack 10 in the energy storage device 100 is determined, and the plurality of battery packs 10 can communicate with each other, or can communicate with the user's mobile terminal, or can be used to communicate with the user's energy management system.

[0059] In some embodiments, the short circuit detection unit 30 is disposed on the closure 20 .

[0060] In this way, by disposing the short-circuit detection unit 30 in the sealing member 20 , the short-circuit of the bottommost battery pack 10 can be achieved.

[0061] Specifically, the short circuit detection unit 30 is disposed on the closure 20. When the closure 20 closes the opening of the battery pack 10, the short circuit of the bottom battery pack 10 can be realized, so that the communication addresses of all battery packs 10 can be confirmed. At the same time, the closure 20 is small in size and light in weight. When installed on the energy storage device 100, it basically does not affect its weight and volume, thereby facilitating the lightweight and miniaturized design and manufacturing of the energy storage device 100.

[0062] See also Figure 6 and Figure 7 In some embodiments, the connection terminal 30 includes a first connection terminal 121 and a second connection terminal 122, the first connection terminal 121 is connected to the positive terminal 14 of the power supply, and the second connection terminal 122 is connected to the negative terminal 16 of the power supply through the first resistor 15. The electrical connector 21 includes a fourth connection terminal 211 and a fifth connection terminal 212, and the fourth connection terminal 211 is connected to the fifth connection terminal 212 through the second resistor 24. When the closing member 20 closes the opening, the fourth connection terminal 211 is electrically connected to the first connection terminal 121, and the fifth connection terminal 212 is electrically connected to the second connection terminal 122. The short circuit detection unit 30 detects the first signal by detecting the level of the fifth connection terminal 212.

[0063] In this way, the short detection unit 30 detects the first signal by detecting the level of the fifth connection terminal 212 , and can determine the communication address of the battery pack 10 at the bottom layer.

[0064] Specifically, when the closing member 20 closes the opening 110, the first connection terminal 121 is connected to the fourth connection terminal 211, and the second connection terminal 122 is connected to the fifth connection terminal 212. The second connection terminal 122 is connected to the negative terminal 16 of the power supply through the first resistor 15, and the fourth connection terminal 211 is connected to the fifth connection terminal 212 through the second resistor 24. The first connection terminal 121, the fourth connection terminal 211, the second connection terminal 122 and the fifth connection terminal 212 supply power to the short detection unit 30, the first resistor 15 and the second resistor 24 are connected to form a voltage divider circuit, the voltage at the second connection terminal 122 and the fifth connection terminal 212 is reduced, and the short detection unit 30 detects the level of the fifth connection terminal 212 to detect the first signal.

[0065] In one embodiment, the resistance values ​​of the first resistor 15 and the second resistor 24 are equal. After voltage division by the first resistor 15 and the second resistor 24, the voltage at the second connection terminal 122 and the fifth connection terminal 212 is half of the power supply voltage. In this way, by detecting the voltage at the second connection terminal 122 and / or the fifth connection terminal 212, it is possible to detect whether the bottom-layer battery pack 10 of the energy storage device 100 is installed with the closure 20, that is, to detect whether the battery pack 10 is short-circuited.

[0066] See also Figures 5 to 7In some embodiments, the energy storage device 100 includes a water immersion detection unit 31 and a water immersion detection component 32. The water immersion detection unit 31 is electrically connected to the water immersion detection component 32. When the closing component 20 closes the opening and the closing component 20 is immersed in water, the water immersion detection unit 31 is configured to detect a second signal emitted by the water immersion detection component 32 to determine that the closing component 20 is immersed in water, and when the second signal is detected, the electrical connection component 21 is controlled to emit a water immersion alarm signal.

[0067] In this way, the sealing member 20 has a water immersion detection function, and can timely detect water immersion at the bottom of the battery pack 10, thereby protecting the electrical safety of the energy storage device.

[0068] Specifically, the water immersion detection unit 31 is configured to detect a second signal emitted by the water immersion detection component 32 to determine whether the sealing component 20 is flooded, and control the electrical connection component 21 to emit a water immersion alarm signal when the second signal is detected.

[0069] The closure member 20 is installed at the opening 110 of the battery pack 10, and the electrical connector 21 is connected to the connection terminal 12 to the closure member 20. When the opening 110 is closed and the closure member 20 is immersed in water, the water immersion detection member 32 generates a second signal, and the water immersion detection unit 31 can determine that the closure member 20 is immersed in water according to the second signal.

[0070] The short circuit detection unit 30 has an alarm function. When the second signal is detected, the electrical connector 21 is controlled to send out a water immersion alarm signal. Thus, an alarm message can be sent out in time to remind the user when the bottom of the energy storage device is flooded.

[0071] Optionally, the water immersion detection unit 31 may have an automatic power-off function. When a second signal is obtained to determine that the bottom of the battery pack 1010 is flooded, an automatic power-off instruction may be sent to the BMS to control the energy storage device to stop charging or supplying power to the outside, thereby preventing damage to internal components of the energy storage device and causing safety hazards.

[0072] In some embodiments, the water immersion detection unit 31 and the water immersion detection member 32 are disposed on the closure member 20 .

[0073] In this way, the water immersion detection function of the energy storage device 100 is set in the sealing member 20 , and the battery pack 10 can realize the water immersion detection function by installing the sealing member 20 at the bottom of the battery pack 10 .

[0074] Specifically, the closure member 20 is used to close the opening of the battery pack 10 and short-circuit the bottommost battery pack 10. The water immersion detection unit 31 and the water immersion detection member 32 are arranged on the closure member 20, which can expand the function of the closure member 20. By installing the closure member 20 at the bottom of the battery pack 10, the battery pack 10 can realize the water immersion detection function, thereby reducing the potential safety hazards of the energy storage device.

[0075] Furthermore, the short circuit detection unit 30, the water immersion detection unit 31 and the water immersion detection component 32 are all arranged in the closure 20. In this way, the short circuit detection and water immersion detection functions of the energy storage device 100 are integrated in the closure 20. On the one hand, the functions of the closure 20 are enriched. On the other hand, the sealing and short circuit of the battery pack 10 and water immersion detection can be achieved simultaneously by simply installing the closure 20.

[0076] In other embodiments, either the short circuit detection function or the water immersion detection function may be provided on the sealing member 20 , and the other function may be provided on the outer shell of the battery pack 10 .

[0077] It is understandable that the short circuit detection unit 30 and the water immersion detection unit 31 may be a microcontroller unit (MCU) disposed on the sealing member 20. Specifically, the short circuit detection unit 30 and the water immersion detection unit 31 may be integrated into one control chip, or the short circuit detection unit 30 and the water immersion detection unit 31 may use one control chip separately and be disposed on the sealing member 20 respectively.

[0078] In some embodiments, the connection terminal 30 includes a first connection terminal 121, a second connection terminal 122 and a third connection terminal 123, the first connection terminal 121 is connected to the positive power terminal 14, the second connection terminal 122 is connected to the negative power terminal 16 through the first resistor 15, and the third connection terminal 123 is connected to the negative power terminal 16; the electrical connector 21 includes a fourth connection terminal 211, a fifth connection terminal 212 and a sixth connection terminal 213; when the closing member 20 closes the opening, the fourth connection terminal 211 is electrically connected to the first connection terminal 121 as the positive power terminal 14 of the water immersion detection unit 31, the sixth connection terminal 213 is electrically connected to the third connection terminal 123 as the negative power terminal 16 of the water immersion detection unit 31, the fifth connection terminal 212 is electrically connected to the second connection terminal 122, and the fifth connection terminal 212 is configured to receive a control instruction of the water immersion detection unit 31 to send a water immersion alarm signal.

[0079] In this way, based on the second signal of the water immersion detection element 32, it can be determined that the sealing element 20 is flooded and an alarm is issued.

[0080] Specifically, when the closing piece 20 closes the opening, the connecting terminal 30 and the electrical connecting piece 21 are connected, the fourth connecting end 211 is electrically connected to the first connecting end 121 as the positive power terminal 14 of the water immersion detection unit 31, and the sixth connecting end 213 is electrically connected to the third connecting end 123 as the negative power terminal 16 of the water immersion detection unit 31, so as to supply power to the water immersion detection piece 32 and the water immersion detection unit 31.

[0081] The water immersion detection member is configured to send out a second signal when the closure member 20 closes the opening 110 and the closure member 20 is immersed in water. The water immersion detection unit 31 may have an alarm function, and when the second signal is detected, the electrical connection member 21 is controlled to send out a water immersion alarm signal, so that an alarm message can be sent out in time to remind the user when the bottom of the energy storage device is immersed in water.

[0082] In one embodiment, the first connection end 121, the second connection end 122 and the third connection end 123 of the connecting terminal 30 can be needle holders, and the fourth connection end 211, the fifth connection end 212 and the sixth connection end 213 of the electrical connector 21 can be signal pins. When the closing member 20 closes the opening 100, the signal pin of the electrical connector 21 is inserted into the needle holder of the connecting terminal 30, thereby realizing the electrical connection between the electrical connector 21 and the connecting terminal 30.

[0083] In other embodiments, the first connection end 121, the second connection end 122 and the third connection end 123 of the connection terminal 30 may be signal pins, and the fourth connection end 211, the fifth connection end 212 and the sixth connection end 213 of the electrical connector 21 may be needle holders.

[0084] See also Figure 3 In some embodiments, the water immersion detection component 32 is disposed on the bottom plate 28 of the closure member 20 , and the water immersion detection component 32 includes two conductive wires 321 , and the conductive wires 321 are bent and disposed on the surface of the bottom plate 28 away from the battery pack 10 .

[0085] In this way, by detecting the resistance value of the conductive thread 321 , it is possible to detect whether water has occurred at the bottom of the battery pack 10 .

[0086] Specifically, the water immersion detection member 32 includes two conductive wires 321, which are spaced apart and bent and arranged on the surface of the bottom plate 28 away from the battery pack 10. When the bottom plate 28 is dry, the detection unit has a large resistance. When the bottom plate 28 is soaked in water, the two conductive wires 321 are turned on and the resistance is significantly reduced, so that it can be judged whether the bottom plate 28 is soaked in water according to the change in the resistance of the detection unit.

[0087] The two conductive wires 321 are located side by side on the bottom surface of the sealing member 20 , at the lowest point of the entire battery pack 10 chassis, and are electrically connected to the short circuit detection unit 30 .

[0088] When there is no water immersion, the two conductive wires 321 are insulated and have a high resistance (greater than 1000K ohms). When water penetrates into the bottom of the chassis, water is conducted between the two conductive wires 321 and the resistance becomes smaller, less than 1000K ohms, usually tens to 200K ohms.

[0089] The water immersion detection unit 31 is connected to the water immersion detection member 32 through the water immersion detection port. When water enters the bottom plate 28, the resistance between the two conductive wires 321 decreases and is less than a set value (e.g., less than 200K ohms), and the short circuit detection unit 30 can control the fifth connection terminal 212 to output a square wave signal at a preset frequency, thereby sending an alarm signal indicating that there is water at the bottom of the battery pack 10 chassis.

[0090] See also Figure 5 In some embodiments, the battery pack 10 includes an identification unit 18, and the identification unit 18 is configured to determine that the battery pack 10 is in a non-short state when the potential of the second connection terminal 122 is a third signal.

[0091] In this way, the battery pack 10 has a short circuit detection function.

[0092] Specifically, when the closure member 20 is not installed at the bottom of the battery pack 10, the voltage of the second connection terminal 122 is pulled down by the first resistor 15 to the same voltage as the negative terminal 16 of the power supply. In this way, the BMS of the battery pack 10 can identify that the closure member 20 is not installed at the bottom of the battery pack 10 or that the battery pack 10 is not short-circuited through the third signal of the second connection terminal 122.

[0093] When the short circuit detection unit 30 identifies that the voltage value of the second connection terminal 122 is between the voltage values ​​of the positive power terminal 14 and the negative power terminal 16, it can be identified that the closing member 20 closes the opening 110 and the battery pack 10 is short-circuited. When the short circuit detection unit 30 identifies that the voltage value of the second connection terminal 122 is the same as the voltage of the negative power terminal 16, it can be identified that the closing member 20 is not installed at the bottom of the battery pack 10, or the battery pack 10 is not short-circuited. Further, if the battery pack 10 is not short-circuited, it can be determined that the battery pack 10 is not the bottommost battery pack.

[0094] See also Figures 9 to 11 In some embodiments, the connecting terminal 12 includes a first connecting portion 13, the closure member 20 includes a second connecting portion 26 and a bottom plate 28, the second connecting portion 26 is formed on the bottom plate 28, the second connecting portion 26 extends into the opening 110 and cooperates with the first connecting portion 13, and the bottom plate 28 seals the opening 110 in the housing 11.

[0095] Thus, the sealing member 20 has a simple structure and is easy to process, which is beneficial to reducing production costs.

[0096] Specifically, in the embodiment of the present application, the bottom plate 28 is a thin plate. It is easy to understand that the size of the bottom plate 28 should be larger than the size of the opening 110. Furthermore, when the closure 20 is installed on the outer shell 11, a sealing pattern can be provided in the area where the surface of the bottom plate 28 close to the outer shell 11 is in contact with the outer shell 11.

[0097] Furthermore, all corners of the bottom plate 28 are provided with transition chamfers, which not only facilitates processing but also prevents scratches on the hands, thereby improving the safety of the producers and assemblers.

[0098] See also Fig.10 and Fig.11 In some embodiments, the bottom plate 28 is in a runway shape, and both ends of the bottom plate 28 in the length direction are warped away from the housing 11 to form warped edges 281.

[0099] Thus, warped edges 281 are provided at both ends of the bottom plate 28 to facilitate assembly and disassembly of the closure member 20 .

[0100] Specifically, the warped edge 281 is semicircular, and the side where the diameter of the semicircle is located is connected to the bottom plate 28. The angle formed by the warped edge 281 and the outer shell 11 should not be too small. A too small angle does not provide sufficient convenience when installing or removing the closure 20. The angle formed by the warped edge 281 and the outer shell 11 should not be too large. A too large angle will cause the warped edge 281 to extend outward for a long distance, making the warped edge 281 susceptible to collision. If a collision occurs at the warped edge 281, it is very easy to cause the closure 20 to fall off, causing the waterproofing of the battery pack 10 to be destroyed, causing a safety hazard. At the same time. An angle that is too large can easily cause the warped edge 281 to break when the warped edge 281 is impacted, causing damage to the closure 20, and increasing the cost of maintenance and care of the battery pack 10. In the embodiment of the present application, the angle formed by the warped edge 281 and the outer shell 11 is 15° to 45°. Preferably, the angle formed by the warped edge 281 and the outer shell 11 is 30°.

[0101] See also Figures 9 to 11 In some embodiments, the connection terminal 12 includes a terminal base 124, and the terminal base 124 includes a first connection cylinder 1241; the closure member 2020 includes a second connection cylinder 29, and the second connection cylinder 29 extends upward from the bottom plate 28 and cooperates with the opening 110 and the first connection cylinder 1241; the first connection portion 13 includes an inner wall 1242 of the first connection cylinder 1241, and the second connection portion 26 includes an elastic member 291 sleeved on the second connection cylinder 29. The closure member 2020 and the connection terminal 12 are connected by interference fit with the elastic member 291 and the first connection cylinder 1241.

[0102] In this way, the elastic member 291 can fix the closing member 20 on the first connecting tube 1241 , and at the same time, the elastic member 291 can enhance the waterproof effect of the closing member 20 .

[0103] Specifically, the connection terminal 12 is fixed to the housing 11 of the battery pack 10 through the terminal base 124. The terminal base 124 includes a mounting portion and a first connection cylinder 1241. The terminal base 124 is mounted on the housing 11 of the battery pack 10 through a fastener penetrating the mounting portion. The first connection cylinder 1241 is hollow inside, the cavity is narrow at the top and wide at the bottom, and the bottom outlet corresponds to the opening 110 of the housing 11.

[0104] The bottom plate 28 and the second connecting tube 29 are an integral structure formed by integral processing, and the second connecting tube 29 is arranged in the middle of the bottom plate 28. The bottom plate 28 can be made of the same material as the housing 11. A groove is arranged on the side of the bottom plate 28 away from the second connecting portion 26 corresponding to the position of the second connecting portion 26 to prevent defects such as shrinkage holes and stress concentration from being formed here during the injection molding process.

[0105] The elastic member 291 is cylindrical in shape as a whole, and is sleeved on the outer surface of the second connecting cylinder 29. When the closure member 20 is installed on the battery pack 10, the elastic member 291 is at least partially located between the first connecting cylinder 1241 and the second connecting cylinder 29. The elastic member 291 undergoes elastic deformation, and its two sides respectively abut against the inner wall 1242 of the first connecting cylinder 1241 and the outer wall of the second connecting cylinder 29, so that the opening 110 is sealed. In addition, the friction force generated between the elastic member 291 and the inner wall 1242 of the first connecting cylinder 1241 and the outer wall of the second connecting cylinder 29 can fix the closure member 20 in the opening 110 to prevent it from falling off easily.

[0106] Optionally, the elastic member 291 may be made of rubber, silicone, elastic plastic or other materials with a certain degree of elasticity.

[0107] See also Fig.12 In some embodiments, the elastic member 291 includes a plurality of inverted rings 2911 , and the plurality of inverted rings 2911 are arranged along the axial direction of the second connecting tube 29 .

[0108] In this way, the multiple inverted rings 2911 form multiple waterproof structures, further improving the waterproof effect of the closure member 20.

[0109] Specifically, the inverted ring 2911 is disposed on the outer surface of the elastic member 291 , one end of the inverted ring 2911 is connected to the outer surface of the elastic member 291 , and the other end thereof abuts against the inner wall 1242 of the first connecting tube 1241 .

[0110] The first inverted ring 2911 is tilted downward, and the angle formed by the inverted ring 2911 and the horizontal plane is about 30°. In the embodiment of the present application, the number of the inverted rings 2911 is three, and the three inverted rings 2911 are equidistantly distributed along the axial direction of the second connecting cylinder 29. Further, the thickness of the inverted ring 2911 should not be too thin. An inverted ring 2911 that is too thin has a poor sealing effect and is easily damaged. The thickness of the inverted ring 2911 should not be too thick. An inverted ring 2911 that is too thick has poor elasticity, which is not conducive to the installation and removal of the closure 20.

[0111] See also Fig.10 In some embodiments, the closure 2020 includes a sealing gasket 27 located on the bottom plate 28, and the sealing gasket 27 is located between the housing 11 and the bottom plate 28.

[0112] In this way, the sealing gasket 27 forms another waterproof structure between the housing 11 and the bottom plate 28 , which is beneficial to further improve the waterproof effect of the closure 20 .

[0113] Specifically, the elastic member 291 is an integral structure of integral injection molding, and the sealing gasket 27 is located at one end of the elastic member 291 close to the bottom plate 28. Further, the surface where the sealing gasket 27 contacts the bottom plate 28 and / or the surface where the sealing gasket 27 contacts the housing 11 may be provided with an anti-slip sealing pattern.

[0114] In some embodiments, the battery pack 10 includes a plurality of battery packs 10 , which are stacked and each battery pack 10 is connected to the battery pack 10 below via a connecting terminal 12 , and the battery pack 10 at the bottom is connected to the closure 20 .

[0115] In this way, the battery capacity of the energy storage device 100 can be expanded or reduced as needed.

[0116] Specifically, the energy storage device 100 generally includes a functional module and a plurality of battery packs 10, wherein the plurality of battery packs 10 are stacked and arranged, wherein the plurality of battery packs 10 may specifically include an energy storage integrated machine and at least one power pack, wherein the energy storage integrated machine mainly includes an inverter and a battery module, and the power pack mainly includes a battery module, such as Figure 1 As shown, after the energy storage integrated machine and at least one power pack are stacked, they are connected through their respective connection terminals 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.

[0117] In summary, an energy storage device 100 provided by an embodiment of the present invention, when the closure member 20 is installed in the opening 110, is connected to the connection terminal 12 through the electrical connector 21. The short detection unit 30 can detect and identify the signal of the electrical connector 21. The short detection unit 30 detects the first signal to determine the communication address of the battery pack 10, thereby realizing the address identification of the battery pack 10.

[0118] At the same time, the energy storage device 100 also has the functions of water immersion identification and closure member 20 installation identification. When the short circuit detection unit 30 detects the first signal, the battery pack 10 is short-circuited, that is, the closure member 20 is installed at the opening 110 of the battery pack 10; when the water immersion detection unit 31 detects the second signal, it indicates that the bottom of the battery pack 10 is flooded, and when the short circuit detection unit 30 does not detect any signal or the battery pack 10 detects the third signal, it indicates that the closure member 20 is not installed, or the battery pack 10 is not the bottommost battery pack 10 of the energy storage device 100.

[0119] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. 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 invention. In this specification, the schematic representation of the above terms does 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.

[0120] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An energy storage device, characterized in that: include: A battery pack, the battery pack comprising a shell and a connecting terminal, the shell having an opening, and the connecting terminal being arranged at the opening; A closure member, the closure member comprising an electrical connector, the closure member being used to seal the opening to prevent water from entering the opening, and when the closure member seals the opening, the electrical connector is connected to the connection terminal to form a first signal; A short detection unit is configured to detect the first signal to determine that the battery pack is located at the bottom.

2. The energy storage device according to claim 1, characterized in that: The short circuit detection unit is arranged on the closing member.

3. The energy storage device according to claim 1, characterized in that: The connecting terminal includes a first connecting end and a second connecting end, the first connecting end is connected to the positive end of a power supply, and the second connecting end is connected to the negative end of a power supply through a first resistor. The electrical connector includes a fourth connecting end and a fifth connecting end, and the fourth connecting end is connected to the fifth connecting end through a second resistor. When the closing member closes the opening, the fourth connecting end is electrically connected to the first connecting end, and the fifth connecting end is electrically connected to the second connecting end. The short circuit detection unit detects the first signal by detecting the level of the fifth connecting end.

4. The energy storage device according to claim 1, characterized in that: The energy storage device includes a water immersion detection unit and a water immersion detection member, wherein the water immersion detection unit is electrically connected to the water immersion detection member, and when the closing member closes the opening and the closing member is immersed in water, the water immersion detection unit is configured to detect a second signal emitted by the water immersion detection member to determine that the closing member is immersed in water.

5. The energy storage device according to claim 4, characterized in that: The water immersion detection unit is configured to control the electrical connection component to send out a water immersion alarm signal when the second signal is detected.

6. The energy storage device according to claim 4, characterized in that: The water immersion detection unit and the water immersion detection member are arranged on the sealing member.

7. The energy storage device according to claim 4, characterized in that: The connection terminal includes a first connection end, a second connection end and a third connection end, the first connection end is connected to the positive end of the power supply, the second connection end is connected to the negative end of the power supply through a first resistor, and the third connection end is connected to the negative end of the power supply. The electrical connector includes a fourth connection end, a fifth connection end and a sixth connection end; when the closing member closes the opening, the fourth connection end is electrically connected to the first connection end as the positive end of the power supply of the water immersion detection unit, the sixth connection end is electrically connected to the third connection end as the negative end of the power supply of the water immersion detection unit, and the fifth connection end is electrically connected to the second connection end. The fifth connection end is configured to receive a control instruction of the water immersion detection unit to send a water immersion alarm signal.

8. The energy storage device according to claim 4, characterized in that: The water immersion detection component is arranged on the bottom plate of the sealing component, and the water immersion detection component includes two conductive wires, and the conductive wires are bent and arranged on a surface of the bottom plate away from the battery pack.

9. The energy storage device according to claim 3, characterized in that: The battery pack includes an identification unit, and the identification unit is configured to determine that the battery pack is in a non-short-circuited state when detecting that the level of the second connection end is a third signal.

10. The energy storage device according to claim 1, characterized in that: The connecting terminal includes a first connecting portion, and the sealing member includes a second connecting portion and a bottom plate, wherein the second connecting portion is formed on the bottom plate, the second connecting portion extends into the opening and cooperates with the first connecting portion, and the bottom plate seals the opening in the housing.

11. The energy storage device according to claim 10, characterized in that: The connecting terminal includes a terminal base, and the terminal base includes a first connecting cylinder; the closing piece includes a second connecting cylinder, and the second connecting cylinder extends upward from the bottom plate and cooperates with the opening and the first connecting cylinder; the first connecting part includes an inner wall of the first connecting cylinder, and the second connecting part includes an elastic part sleeved on the second connecting cylinder; the closing piece and the connecting terminal are connected by interference fit between the elastic part and the first connecting cylinder.

12. The energy storage device according to claim 11, characterized in that: The elastic member includes a plurality of inverted rings, and the plurality of inverted rings are arranged along the axial direction of the second connecting tube.

13. The energy storage device according to claim 11, characterized in that: The closure includes a sealing gasket located on the bottom plate, the sealing gasket being located between the housing and the bottom plate.

14. The energy storage device according to claim 1, characterized in that: The battery packs include a plurality of battery packs, which are stacked and each of which is connected to the battery pack below via the connecting terminal, and the battery pack at the bottom is connected to the closing member.

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