Energy storage device

Abstract

The utility model relates to the technical field of energy storage, in particular to an energy storage device which comprises a body and at least one state indicating circuit, and the state indicating circuit is installed on the body. The state indicating circuit comprises a superior circuit, an optocoupler MOS tube and a subordinate circuit, wherein the optocoupler MOS tube is connected between the superior circuit and the subordinate circuit. Wherein the upper-level circuit is used for sending a first electric signal indicating the state of the body, the optocoupler MOS tube is used for converting the first electric signal into an optical signal and then converting the optical signal into a second electric signal, and the lower-level circuit indicates the corresponding state based on the second electric signal. The safety performance of the energy storage device can be improved.

Description

Technical Field

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

[0002] An energy storage device is a device that stores electrical energy. It can be charged and discharged according to the needs of production activities to maintain their normal operation.

[0003] Energy storage devices typically include circuits with various functions, which can be used to display operating conditions, such as operational status, grid connection status, and fault conditions, to personnel. Based on these displays, personnel can determine the operating status of the energy storage device.

[0004] In related technologies, when an energy storage device fails, its circuit often suffers extensive damage, and even parts unrelated to the cause of the failure are destroyed, resulting in poor safety. Utility Model Content

[0005] In view of this, the present application provides an energy storage device to improve its safety performance.

[0006] Specifically, the following technical solutions are included:

[0007] The present application provides an energy storage device, which includes a body and at least one status indication circuit, wherein the status indication circuit is mounted on the body.

[0008] The status indication circuit includes an upper circuit, an optocoupler MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor) and a lower circuit, and the optocoupler MOS transistor is connected between the upper circuit and the lower circuit.

[0009] Among them, the upper circuit is used to send a first electrical signal indicating the state of the body, the optocoupler MOS tube is used to convert the first electrical signal into an optical signal and then into a second electrical signal, and the lower circuit indicates the corresponding state based on the second electrical signal.

[0010] Optionally, the lower-level circuit includes an indicator light, which indicates the corresponding state by one or more of turning on and off, different colors, and flashing, or the lower-level circuit includes a switch, which indicates the corresponding state by opening and closing.

[0011] Optionally, the main body has a door body, the door body is rotatable relative to the main body, and the indicator light is installed on the door body.

[0012] Optionally, the optocoupler MOS tube includes an upper-level interface and a lower-level interface, the upper-level interface and the lower-level interface are electrically isolated, the upper-level interface is connected to the upper-level circuit, and the lower-level interface is connected to the lower-level circuit.

[0013] Optionally, the optocoupler MOS tube includes a light-emitting diode, a photoelectric conversion element, a first MOS tube and a second MOS tube, the light-emitting diode is connected to the upper interface, the photoelectric conversion element is connected to the first MOS tube and the second MOS tube, and the lower interface is connected to the first MOS tube and the second MOS tube respectively.

[0014] Optionally, the status indication circuit includes a fuse, and the fuse is connected to the lower-level interface and the drain of the second MOS tube.

[0015] Optionally, the photoelectric conversion element is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, and the source of the first MOS transistor is connected to the source of the second MOS transistor.

[0016] Optionally, the optocoupler MOS tube includes a first parasitic diode and a second parasitic diode, the first parasitic diode is connected to the drain of the first MOS tube and the source of the first MOS tube, and the second parasitic diode is connected to the drain of the second MOS tube and the source of the second MOS tube.

[0017] Optionally, the drain of the first MOS transistor is connected to the lower-level interface, and the drain of the second MOS transistor is connected to the lower-level interface.

[0018] Optionally, the drain of the first MOS transistor is connected to the lower-level interface, and the drain of the second MOS transistor is grounded.

[0019] The beneficial effects of the technical solutions provided by the embodiments of the present application include at least the following: the upper circuit can indicate the status of the main body via a first electrical signal. The lower circuit can help the user understand the status of the main body via a second electrical signal. Because the user is informed via the second electrical signal converted from the optical signal, if a fault such as a short circuit occurs in the lower circuit, excessive current will not flow through the lower circuit and break down the main body, thereby improving the safety performance of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of a status indication circuit provided in an embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the assembly of a lower-level interface and an optocoupler MOS tube provided in an embodiment of the present application.

[0024] The reference numerals in the figures represent:

[0025] 1. Main body; 11. Door; 12. High-voltage box;

[0026] 2. Status indication circuit; 21. Upper-level circuit; 22. Optocoupler MOS tube; 221. Upper-level interface; 222. Lower-level interface; 223. Light-emitting diode; 224. Photoelectric conversion element; 225. First MOS tube; 226. Second MOS tube; 227. First parasitic diode; 228. Second parasitic diode; 23. Lower-level circuit; 231. Indicator light; 232. Switch; 24. Fuse.

[0027] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] The directional nouns involved in the embodiments of this application, such as "upper", "lower", "side", etc., are generally expressed in the form of Figure 1 The relative relationships shown in the figure are used as a reference, and these directional terms are used only to more clearly describe the relationship between structures, not to describe absolute directions. When the product is placed in different postures, the direction may change, for example, "up" and "down" may be interchangeable.

[0030] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0031] In order to make the technical solutions and advantages of the present application clearer, the implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0032] The present application provides an energy storage device, such as Figure 1 and Figure 2 As shown, the energy storage device includes a body 1 and at least one status indication circuit 2 , and the status indication circuit 2 is mounted on the body 1 .

[0033] The status indication circuit 2 includes an upper circuit 21 , an optocoupler MOS transistor 22 and a lower circuit 23 . The optocoupler MOS transistor 22 is connected between the upper circuit 21 and the lower circuit 23 .

[0034] Among them, the upper circuit 21 is used to send a first electrical signal indicating the state of the body 1, the optocoupler MOS tube 22 is used to convert the first electrical signal into an optical signal and then into a second electrical signal, and the lower circuit 23 indicates the corresponding state based on the second electrical signal.

[0035] It is understood that the upper circuit 21 can indicate the status of the main body 1 through a first electrical signal. The lower circuit 23 can help the user understand the status of the main body 1 through a second electrical signal. Because the user is informed through the second electrical signal converted from the optical signal, if a fault such as a short circuit occurs in the lower circuit 23, excessive current will not flow through the lower circuit 23 and break down the main body 1, thereby improving the safety performance of the energy storage device.

[0036] In an embodiment of the present application, the upper circuit 21 is not directly connected to the lower circuit 23. While transmitting information, the on / off signal of the upper circuit 21 does not receive and accept feedback from the lower circuit 23. Even if a high-cost fault such as breakdown occurs in the lower circuit 23, it will not be transmitted to the upper circuit 21. The information transmission power between the upper circuit 21 and the lower circuit 23 is extremely low, and is transmitted through the optocoupler MOS tube 22, so the lower circuit 23 does not use the energy of the upper circuit 21. In addition, the optocoupler MOS tube 22 couples the upper circuit 21 and the lower circuit 23, which can reduce interference from external signals. Due to the use of the optocoupler MOS tube 22, there is almost no energy leakage in the energy storage device. The transmission of information will mainly be realized in the form of light inside the integrated darkroom, which also reduces the structural complexity of the energy storage device.

[0037] In the embodiment of the present application, the first electrical signal and the second electrical signal may be voltage signals, current signals, or the like.

[0038] In the embodiment of the present application, the state of the main body 1 can be one or more of an operating state, a grid-connected state and a fault state, and the optical signal obtained by converting the second electrical signal can be perceived by the user.

[0039] In the embodiment of the present application, the state of the main body 1 may refer to the state of all components of the main body 1 , or may refer to the state of some components of the main body 1 .

[0040] In the embodiment of the present application, the number of the state indicating circuits 2 can be 1, 2, 3 or 4, or any other number. Different state indicating circuits 2 can indicate different states of the body 1 or the same state of different parts of the body 1.

[0041] In the embodiment of the present application, the status indication circuit 2 includes a first status indication circuit, a second status indication circuit, and a third status indication circuit. The first status indication circuit is used to indicate whether the main body 1 is in an operating state, the second status indication circuit is used to indicate whether the main body is in a fault state, and the third status indication circuit is used to indicate whether the main body is in a grid-connected state. The first status indication circuit, the second status indication circuit, and the third status indication circuit are adapted to the operating state of the main body 1, facilitating the status indication circuit 2 to indicate the current state of the main body 1, thereby providing a user with a judgment.

[0042] In the embodiments of this application, Figure 1 As shown, the main body 1 includes a high-voltage box 12, and an indicator light 231 is mounted on the high-voltage box 12 to indicate the status of the high-voltage box 12. The high-voltage box 12 can be used to connect to other devices to achieve electrical energy input and output. The indicator light 231 indicates the status of the high-voltage box 12, which helps the user understand and take appropriate measures in the event of a malfunction of the high-voltage box 12.

[0043] In the embodiment of the present application, the indicator light 231 can indicate that the high-voltage box 12 is in a fault state by lighting up red light.

[0044] In summary, the energy storage device of the present application uses an integrated low-cost, low-power optocoupler MOS tube 22 to solve the problem of accidental high-voltage electric shock in the lower-level circuit 23, which may cause the energy storage cabinet body to be reversely broken down and catch fire; at the same time, it also uses simple measures to prevent the collapse of the exposed circuit, and solves the problems of personal safety, anti-reverse, and anti-cascade breakdown that damage multiple devices during the transmission of electronic signals such as the indicator lights 231 of industrial equipment.

[0045] In some of the embodiments of this application, Figure 1 As shown, the lower circuit 23 includes an indicator light 231, and the indicator light 231 indicates the corresponding state by one or more of lighting, different colors, and flashing.

[0046] It is understandable that the changing mode of the above-mentioned indicator light 231 can be perceived by the user, which is helpful for the user to know the status of the main body 1.

[0047] In the embodiment of the present application, the indicator light 231 may be a light emitting diode, which may undergo corresponding changes when receiving the second electrical signal.

[0048] In the embodiment of the present application, the indicator light 231 can indicate that the body 1 is in different states by emitting red, blue, green or yellow light.

[0049] In some of the embodiments of this application, Figure 1 As shown, the lower circuit 23 includes a switch 232 , which indicates a corresponding state by being opened and closed.

[0050] It is understandable that the changing mode of the switch 232 can be perceived by the user, which helps the user to know the status of the body 1.

[0051] In some of the embodiments of this application, Figure 1 As shown, the main body 1 has a door body 11 , which can rotate relative to the main body 1 , and the indicator light 231 is installed on the door body 11 .

[0052] It is understandable that the door body 11 is a position that the user often touches and needs to watch when operating the main body 1. Installing the indicator light 231 on the door body 11 is helpful for the user to understand the status of the main body 1.

[0053] In the embodiment of the present application, the indicator light 231 can be installed on the door body 11 by embedding, bonding, etc.

[0054] In some of the embodiments of this application, Figure 2 As shown, the optocoupler MOS tube 22 includes an upper interface 221 and a lower interface 222 . The upper interface 221 and the lower interface 222 are electrically isolated from each other. The upper interface 221 is connected to the upper circuit 21 , and the lower interface 222 is connected to the lower circuit 23 .

[0055] It will be appreciated that the light-emitting diode 223, connected to the upper interface 221, can convert the first electrical signal into an optical signal, which is received by the optocoupler MOS transistor 22. The lower interface 222 facilitates the electrical connection between the optocoupler MOS transistor 22 and the lower circuit 23, and facilitates the second electrical signal sent by the lower circuit 23 to indicate the status of the main body 1. The upper interface 221 and the lower interface 222 are electrically isolated, so that when a fault such as a short circuit occurs in the upper circuit 21 and a large current is generated, the lower circuit 23 will not be broken down through the optocoupler MOS transistor 22, causing damage to the main body 1.

[0056] In some of the embodiments of this application, Figure 2As shown, the optocoupler MOS tube 22 includes a light-emitting diode 223, a photoelectric conversion element 224, a first MOS tube 225 and a second MOS tube 226. The light-emitting diode 223 is connected to the upper interface 221, the photoelectric conversion element 224 is connected to the first MOS tube 225 and the second MOS tube 226, and the lower interface 222 is connected to the first MOS tube 225 and the second MOS tube 226 respectively.

[0057] It can be understood that the light-emitting diode 223 can convert the first electrical signal into an optical signal, and the photoelectric conversion element 224 can convert the received optical signal into a second electrical signal, and at the same time cooperate with the first MOS tube 225 and the second MOS tube 226 to realize the transmission of the second electrical signal, and transmit the second electrical signal to the lower-level circuit 23 through the lower-level interface 222, which is conducive to the user's perception of the status of the main body 1.

[0058] In the embodiment of the present application, the first MOS transistor 225 and the second MOS transistor 226 may be N-type MOS transistors or P-type MOS transistors.

[0059] In the embodiments of this application, Figure 3 As shown in the figure, DO1P, DO2P, DO3P and DO4P respectively represent the drain of a second MOS tube 226, DO1N, DO2N, DO3N and DO4N respectively represent the drain of a first MOS tube 225, DO1P and DO1N belong to the same optocoupler MOS tube 22, DO2P and DO2N belong to the same optocoupler MOS tube 22, DO3P and DO3N belong to the same optocoupler MOS tube 22, DO4P and DO4N belong to the same optocoupler MOS tube 22, wherein DO1P, DO1N, DO2N, DO3N and DO4N are all connected to the lower-level interface 222, and DO2P, DO3P and DO4P are grounded, so that it can be used to indicate the grid-connected, operating and fault status of the main body 1.

[0060] In some of the embodiments of this application, Figure 2 As shown, the status indication circuit 2 includes a fuse 24 , which is connected to the lower-level interface 222 and the drain of the second MOS transistor 226 .

[0061] It is understandable that the fuse 24 can generate heat sufficient to melt itself when the lower circuit 23 generates a large current, thereby promptly cutting off the connection between the optocoupler MOS tube 22 and the lower circuit 23, thereby improving the safety of the energy storage device.

[0062] In some of the embodiments of this application, Figure 2 As shown, the photoelectric conversion element 224 is connected to the gate of the first MOS transistor 225 and the gate of the second MOS transistor 226 , and the source of the first MOS transistor 225 and the source of the second MOS transistor 226 are connected.

[0063] It can be understood that the second electric signal generated by the photoelectric conversion element 224 can be transmitted to the lower interface 222 through the gate of the first MOS tube 225 and the gate of the second MOS tube 226, and enter the lower circuit 23 through the lower interface 222.

[0064] In the embodiment of the present application, the arrangement can also make the optocoupler MOS tube 22 not need to distinguish the drain of the first MOS tube 225 and the drain of the second MOS tube 226, and the optocoupler MOS tube 22 has the same function when the two are connected in positive or negative.

[0065] In some embodiments of the present application, as shown in Figure 2 The optocoupler MOS tube 22 includes a first parasitic diode 227 and a second parasitic diode 228, the first parasitic diode 227 connects the drain of the first MOS tube 225 and the source of the first MOS tube 225, and the second parasitic diode 228 connects the drain of the second MOS tube 226 and the source of the second MOS tube 226.

[0066] It can be understood that the first parasitic diode 227 and the second parasitic diode 228 are beneficial for the abnormal energy generated by the lower circuit 23 to pass through and return to the lower circuit 23, avoiding the first MOS tube 225 and the second MOS tube 226 being broken down and damaged by bearing the abnormal energy. In this way, the isolation degree between the lower circuit 23 and the upper circuit 21 can be improved, avoiding the two being damaged by the energy of the same fault at the same time.

[0067] In some embodiments of the present application, as shown in Figure 2 The drain of the first MOS tube 225 is connected with the lower interface 222, and the drain of the second MOS tube 226 is connected with the lower interface 222.

[0068] It can be understood that in this way, the optocoupler MOS tube 22 forms a loop with the lower circuit 23, so that the second electric signal generated by the photoelectric conversion element 224 is fed back to the lower circuit 23 through the first MOS tube 225 and the second MOS tube 226, which is beneficial for the user to know the state of the body 1 through the lower circuit 23.

[0069] In the embodiment of the present application, the lower circuit 23 includes a switch 232, which is turned off when the second electric signal is greater than a set value, indicating the state of the body 1 to the user.

[0070] In the embodiment of the present application, as shown in Figure 3 In the figure, DO1N represents the drain of the first MOS tube 225, and DO1P represents the drain of the second MOS tube 226.

[0071] In the embodiment of the present application, the lower-level circuit 23 can be connected to the lower-level interface 222 using dry contacts.

[0072] In some of the embodiments of this application, Figure 3 As shown, the drain of the first MOS transistor 225 is connected to the lower-level interface 222 , and the drain of the second MOS transistor 226 is grounded.

[0073] It can be understood that the upper circuit 21 can be used to indicate whether the main body 1 is in a grid-connected, operating or faulty state. The drain of the second MOS tube 226 is grounded, which is beneficial to reducing the accumulation of static electricity in the lower circuit 23 and avoiding the situation where the outer shell of the optocoupler MOS tube 22 is charged, which is beneficial to improving the safety of the energy storage device.

[0074] In the embodiments of this application, Figure 3 As shown in the figure, DO2P, DO3P and DO4P respectively represent the drain of a second MOS tube 226, DO2N, DO3N and DO4N respectively represent the drain of a first MOS tube 225, DO1P and DO1N belong to the same optocoupler MOS tube 22, DO2P and DO2N belong to the same optocoupler MOS tube 22, DO3P and DO3N belong to the same optocoupler MOS tube 22, DO4P and DO4N belong to the same optocoupler MOS tube 22, wherein DO2N, DO3N and DO4N are all connected to the lower-level interface 222, and DO2P, DO3P and DO4P are grounded, so that it can be used to indicate the grid-connected, operating and fault status of the main body 1.

[0075] In summary, the energy storage device of the present application completes the transmission of energy level signals at a relatively low safety cost. At the same time, the energy storage device of the present application avoids damage to the upper circuit 21 due to abnormal high voltage of the upper circuit 21, and unnecessary burning of the lower circuit 23 due to the high energy input of the upper circuit 21. The energy storage device of the present application can also realize blind operation of the lower circuit 23, without adding special attention to the anti-reverse insertion text instructions between the boards or in the specification manual.

[0076] The energy storage device of the present application replaces individual components with higher integrated circuits, reduces the complexity and cost of procurement, and reduces the energy consumption required to complete the signal transmission function. It directly ensures that industrial energy storage and even large container energy storage cabinets do not have the risk of reverse triggering of electric shock, lightning strikes, etc. due to exposed fault lights and other signal display lights, which can cause fire in the cabinet.

[0077] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0078] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0079] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises a body (1) and at least one state indicating circuit (2), wherein the state indicating circuit (2) is mounted on the body (1); The state indicating circuit (2) comprises an upper circuit (21), an optical coupling MOS transistor (22) and a lower circuit (23), wherein the optical coupling MOS transistor (22) is connected between the upper circuit (21) and the lower circuit (23); The upper circuit (21) is used to send a first electrical signal indicating the state of the body (1), the optical coupler MOS tube (22) is used to convert the first electrical signal into an optical signal and then into a second electrical signal, and the lower circuit (23) indicates the corresponding state based on the second electrical signal.

2. The energy storage device according to claim 1, characterized in that The lower level circuit (23) includes an indicator light (231), and the indicator light (231) indicates a corresponding state by one or more of lighting, different colors, and flashing. or, The lower circuit (23) includes a switch (232), and the switch (232) indicates a corresponding state by opening and closing.

3. The energy storage device according to claim 2, characterized in that The main body (1) has a door body (11), the door body (11) is rotatable relative to the main body (1), and the indicator light (231) is mounted on the door body (11).

4. The energy storage device according to claim 1, characterized in that The optical coupling MOS tube (22) comprises an upper-level interface (221) and a lower-level interface (222), wherein the upper-level interface (221) and the lower-level interface (222) are electrically isolated from each other, the upper-level interface (221) is connected to the upper-level circuit (21), and the lower-level interface (222) is connected to the lower-level circuit (23).

5. The energy storage device according to claim 4, characterized in that The optical coupling MOS tube (22) comprises a light emitting diode (223), a photoelectric conversion element (224), a first MOS tube (225) and a second MOS tube (226); the light emitting diode (223) is connected to the upper interface (221); the photoelectric conversion element (224) is connected to the first MOS tube (225) and the second MOS tube (226); and the lower interface (222) is respectively connected to the first MOS tube (225) and the second MOS tube (226).

6. The energy storage device according to claim 5, characterized in that The state indication circuit (2) comprises a fuse (24), and the fuse (24) is connected to the lower-level interface (222) and the drain of the second MOS tube (226).

7. The energy storage device according to claim 5, characterized in that The photoelectric conversion element (224) is connected to the gate of the first MOS tube (225) and the gate of the second MOS tube (226), and the source of the first MOS tube (225) and the source of the second MOS tube (226) are connected.

8. The energy storage device according to claim 7, characterized in that The optical coupling MOS tube (22) comprises a first parasitic diode (227) and a second parasitic diode (228), wherein the first parasitic diode (227) is connected to the drain of the first MOS tube (225) and the source of the first MOS tube (225), and the second parasitic diode (228) is connected to the drain of the second MOS tube (226) and the source of the second MOS tube (226).

9. The energy storage device according to claim 7, characterized in that: The drain of the first MOS transistor (225) is connected to the lower-level interface (222), and the drain of the second MOS transistor (226) is connected to the lower-level interface (222).

10. The energy storage device according to claim 7, characterized in that: The drain of the first MOS transistor (225) is connected to the lower-level interface (222), and the drain of the second MOS transistor (226) is grounded.

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