Control box, energy storage equipment and system

Abstract

The utility model provides a control box, energy storage equipment and an energy storage system, and relates to an energy storage technology. Wherein the energy storage equipment comprises a control box and at least one battery box; the control box and the at least one battery box are stacked; wherein two first blind-mating connectors are arranged on the target surface, directly facing the target battery box, of the control box, and the two first blind-mating connectors are in central symmetry about the midpoint of the target surface; a second blind-mating connector matched with the first blind-mating connector is arranged at a corresponding position on one surface, directly facing the control box, of the target battery box; the target battery box is a battery box adjacent to the control box in the at least one battery box; each first blind-mating connector is used for being connected with an outgoing line interface of the control box, and the outgoing line interface is used for being connected with external equipment. The energy storage equipment provided by the utility model can be more flexibly accessed to the external equipment.

Description

Technical Field

[0001] The present application relates to energy storage technology, and in particular to a control box, energy storage equipment and system. Background Art

[0002] Today, every household relies on electricity. Without it, most household activities would be impossible. To cope with unexpected power outages, more and more households are turning to energy storage devices.

[0003] In conventional technology, energy storage devices typically include a control box and at least one battery box. The control box houses a control module, which controls each battery module. The control box and adjacent battery boxes are connected via a blind-mate connector.

[0004] In actual applications, since the position of the control box outlet interface is fixed, there is a defect of inflexible wiring when the control box is connected to an external device at a fixed position. Utility Model Content

[0005] The present application provides a control box, an energy storage device, and a system to solve the problem of inflexible wiring caused by the fixed position of the control box outlet interface.

[0006] In one aspect, the present application provides an energy storage device, comprising a control box and at least one battery box; the control box and at least one battery box are stacked;

[0007] The control box is provided with two first blind-mate connectors on a target surface facing a target battery box, and the two first blind-mate connectors are symmetrical about the midpoint of the target surface; a second blind-mate connector adapted to the first blind-mate connector is provided at a corresponding position on a surface of the target battery box facing the control box; the target battery box is a battery box adjacent to the control box among the at least one battery box;

[0008] Each of the first blind-mate connectors is used to connect to the line outlet interface of the control box, and the line outlet interface is used to connect to an external device.

[0009] In one possible implementation, the first blind-plug connector and the line outlet interface of the control box are connected via a control circuit; the control circuit is used to detect the loop current in the loop formed by the first blind-plug connector and the line outlet interface, and to limit the current when the loop current is greater than a threshold value.

[0010] In one possible implementation, the line outlet interface of the control box includes a total positive pole and a total negative pole; when the number of the second blind-plug connectors is 1, the control circuit includes a first switch and a second switch, the first switch and the second switch are interlocking switches, the first end of the first switch is connected to the positive pole of each of the first blind-plug connectors, and the second end of the first switch is connected to the total positive pole; the first end of the second switch is connected to the negative pole of each of the first blind-plug connectors, and the second end of the second switch is connected to the total negative pole.

[0011] In one possible implementation, the output interface of the control box includes a total positive electrode and a total negative electrode; the control circuit further includes a shunt, a first current limiting unit, and a second current limiting unit; the first current limiting unit includes a third switch, a fourth switch, and a resistor, and the second current limiting unit includes a fuse;

[0012] The main negative electrode is connected to the negative electrode of the first blind-mate connector via the splitter, and the splitter detects the loop current;

[0013] The total positive electrode is connected to the positive electrode of the first blind-mate connector via the third switch, and the fuse is connected in series between the positive electrode of the first blind-mate connector and the third switch. The fourth switch and the resistor are connected in series and then connected in parallel with the third switch. The fourth switch is closed when the loop current is greater than a first threshold and less than a second threshold, and the fuse disconnects the loop when the loop current is greater than the second threshold.

[0014] In one possible implementation, the first blind-mate connector is embedded in the control box, the second blind-mate connector protrudes from a side of the target battery box facing the control box, and the number of the second blind-mate connector is one.

[0015] In one possible implementation, in at least one battery box, when some battery boxes are stacked above the control box and some battery boxes are stacked below the control box, the two first blind-plug connectors on each target surface are connected to the output interface of the control box through a corresponding control circuit.

[0016] In one possible implementation, the battery box is provided with a plurality of battery modules, the plurality of battery modules are placed sequentially along the height direction of the battery box, and the plurality of battery modules are connected in any of the following ways: parallel connection, series connection, and mixed connection.

[0017] In a second aspect, the present application provides an energy storage system, which includes at least one energy storage device as described in any one of the first aspects; when there are at least two energy storage devices, at least two energy storage devices are connected in parallel and then connected to an external device.

[0018] In one possible implementation, when the energy storage system includes at least two energy storage devices, the at least two energy storage devices are arranged in two rows, and the outgoing line side of the control box of the energy storage device in each row faces the other row, and the outgoing line side is the side where the outgoing line interface of the control box is located.

[0019] In the third aspect, the present application provides a control box, which is provided with a control module. The control module is used to connect to the target surface of the battery box and is provided with two first blind-plug connectors that are symmetrical about the midpoint of the target surface. The first blind-plug connectors are adapted to the second blind-plug connector on the battery box, and each of the first blind-plug connectors is used to connect to the output interface of the control box, and the output interface is used to connect to an external device.

[0020] The present application provides a control box, an energy storage device and a system, wherein the energy storage device of the present application includes a control box and at least one battery box, and the control box and the at least one battery box are stacked. Specifically, the control box is provided with two first blind-plug connectors on the target surface facing the adjacent target battery box, and the two first blind-plug connectors are symmetrical about the midpoint of the target surface. Correspondingly, a second blind-plug connector adapted to the first blind-plug connector is provided on the side of the target battery box facing the control box. It can be understood that the two first blind-plug connectors on the target surface are both connected to the line outlet interface of the control box, so as to realize the connection between the battery box and the control box and the external device through the second blind-plug connector, the first blind-plug connector and the line outlet interface. Through the energy storage device of the present application, when the control box needs to be connected to an external device set in a fixed position, the user can adjust the line outlet interface of the control box to a side closer to the external device based on the location of the external device, without having to move the entire energy storage device, thereby improving the wiring flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 A schematic diagram of an application scenario of an energy storage device provided in an embodiment of the present application;

[0023] Figure 2A A schematic diagram of the connection of an energy storage device provided in an embodiment of the present application Figure 1 ;

[0024] Figure 2B A schematic diagram of the structure of an energy storage device provided in an embodiment of the present application Figure 1 ;

[0025] Figure 3A A second connection diagram of an energy storage device provided in an embodiment of the present application;

[0026] Figure 3B A second structural diagram of an energy storage device provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the wiring inside a control box provided in an embodiment of the present application;

[0028] Figure 5A An electrical topology of a control circuit provided in an embodiment of the present application Figure 1 ;

[0029] Figure 5B A second electrical topology diagram of a control circuit provided in an embodiment of the present application;

[0030] Figure 5C Electrical topology diagram 3 of a control circuit provided in an embodiment of the present application;

[0031] Figure 6 A wiring diagram of a control box and a battery box provided in an embodiment of the present application Figure 1 ;

[0032] Figure 7 A second wiring diagram of a control box and a battery box provided in an embodiment of the present application;

[0033] Figure 8 A schematic structural diagram of an energy storage system provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Control box; 11. First blind-mate connector; 12. Outlet interface;

[0036] 2. Battery box; 21. Second blind-mate connector;

[0037] 3. Support leg.

[0038] 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

[0039] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.

[0040] As living standards improve, more and more smart devices are entering households. These devices rely on electricity; without it, many become inoperable. Therefore, maintaining a stable household electricity supply is crucial. To cope with unexpected power outages, more and more households are turning to energy storage devices. These devices serve as an emergency power source when the grid fails or other issues cause a power outage. Furthermore, energy storage devices can also transfer electricity back to the grid.

[0041] It is understood that the energy storage device should include at least a control box and a battery box. The control box is equipped with a control module that connects to the battery modules in the battery box to control the battery modules. More specifically, the control box is connected to external devices. The external devices can be power generation equipment for transmitting electricity to the battery modules, or power consumption equipment for using the electricity released by the battery modules to overcome the period of power outage within the home.

[0042] In the known technology, the control box is generally fixed with wires coming out from one side, which means that when the energy storage device is connected to an external device in a fixed position, it may sometimes be necessary to wind the wires or move the energy storage device to achieve the connection, resulting in the defect of inflexible wiring.

[0043] The present application provides a control box, energy storage device, and system to solve the above-mentioned problems. The energy storage device of the present application includes a stacked control box and a battery box. Two first blind-plug connectors are provided on one side of the control box adjacent to the battery box, symmetrical about the center of the midpoint of the side. Correspondingly, a second blind-plug connector adapted to the first blind-plug connector is provided on the corresponding side of the battery box adjacent to the control box. In the present application, each first blind-plug connector is connected to the outlet interface of the control box, so that the battery box and external equipment are connected through the second blind-plug connector, the first blind-plug connector, and the outlet interface to achieve energy storage or discharge.

[0044] Through this application, when the position of the external device is fixed, the connection method of the control box and the battery box can be changed, that is, the control box output interface side can be changed by connecting it to the battery box through one of the blind plug connectors, thereby eliminating the need to connect to the external device by winding or moving the energy storage device, thereby improving wiring flexibility.

[0045] It is understood that the energy storage device of the present application can be connected to any external device to achieve the function of transmitting or receiving electric energy. Figure 1 A schematic diagram of an application scenario of an energy storage device provided in an embodiment of the present application is shown in FIG. Figure 1As shown, the energy storage device can be connected to the home photovoltaic power generation system and home smart devices. Specifically, the energy storage device is connected to the home photovoltaic power generation system and home smart devices through an energy storage converter. The home photovoltaic power generation system converts solar energy into direct current and transmits it to the energy storage device through the energy storage converter. When the power is cut off in the home, the energy storage device transmits direct current to each home smart device through the energy storage converter. Figure 1 As shown, the energy storage device can also be connected to the power grid through an energy storage converter to store electrical energy when the unit price of electrical energy is low.

[0046] It is understandable that the above-mentioned external devices are generally fixed. When connecting the energy storage device to its corresponding interface, it is sometimes necessary to wind the wires and / or move the energy storage device to make the output interface of the control box closer to the interface of the external device and avoid using too much wire.

[0047] If the energy storage device of the present application is used, the connection method between the control box and the battery box can be changed so that the output interface of the control box is closer to the interface of the external device without moving the energy storage device or winding the wires, thereby improving the wiring flexibility of the energy storage device and effectively saving consumables.

[0048] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the event that the embodiments do not conflict with each other, the following embodiments and features therein may be combined with each other.

[0049] Figure 2A A schematic diagram of the connection of an energy storage device provided in an embodiment of the present application Figure 1 , Figure 2B A schematic diagram of the structure of an energy storage device provided in an embodiment of the present application Figure 1 .like Figure 2A and Figure 2B As shown, in this embodiment, the energy storage device includes a control box 1 and at least one battery box 2. The control box 1 and the at least one battery box 2 are stacked, and the control box 1 is located above the at least one battery box 2. Specifically, the centers of the control box 1 and the battery box 2 are located on the same straight line, and in this embodiment, the cross-sectional areas of the control box 1 and the battery box 2 are the same.

[0050] It is understandable that, in actual applications, the control box 1 and the battery box 2 can be stacked arbitrarily, and the sizes of the control box 1 and the battery box 2 can also be set arbitrarily, which is not limited in this embodiment.

[0051] In this embodiment, the battery box 2 adjacent to the control box 1 is the target battery box 2, and the control box 1 is provided with two first blind-plug connectors 11 on the target surface facing the target battery box 2, and the two first blind-plug connectors 11 are symmetrical about the midpoint of the target surface.

[0052] Accordingly, it can be understood that the target battery box 2 is provided with a second blind-mate connector 21 adapted to the first blind-mate connector 11 on the side facing the target surface of the control box 1. Specifically, the number of the second blind-mate connector 21 is one.

[0053] In this embodiment, the line outlet interface 12 of the control box 1 is used to connect to an external device, and each first blind-plug connector 11 is used to connect to the line outlet interface 12 of the control box 1, so as to connect the battery box 2 with the external device through the second blind-plug connector 21 and any first blind-plug connector 11 and the line outlet interface 12, thereby releasing or absorbing electrical energy.

[0054] Specifically, a switch is provided between the first blind-mate connector 11 and the outlet interface 12. The switch is initially in the off state. By turning the switch on and off, whether the first blind-mate connector 11 is connected to the outlet interface 12 is set to achieve connection between the battery box 2 and the external device. It is understood that if the first blind-mate connector 11 is connected to the second blind-mate connector 21, it is connected to the outlet interface 12.

[0055] In this embodiment, a detection button can be provided on the control box 1 on a side of the two first blind-mate connectors 11 facing the second blind-mate connector 21, and the detection button is pressed when the first blind-mate connector 11 is connected to the second blind-mate connector 21. When the control module detects that any detection button is pressed, it controls the switch connecting the corresponding first blind-mate connector 11 and the outlet interface 12 to change from an off state to an on state, thereby connecting the first blind-mate connector 11 to the outlet interface 12. In actual application, the user can also press the button corresponding to the first blind-mate connector 11 to let the controller know that the first blind-mate connector 11 is connected to the second blind-mate connector 21. Alternatively, a control button corresponding to a switch can be provided on the outside of the control box 1. After the user determines the connection method between the battery box 2 and the control box 1, he or she can press the corresponding control button according to the connection method to change the corresponding switch from an off state to an on state, thereby connecting the battery box 2 to the control box 1.

[0056] Optionally, the first blind-plug connector 11 and the line outlet interface 12 can also be directly connected through a wire, that is, after the user determines which first blind-plug connector 11 the second blind-plug connector 21 of the battery box 2 is connected to, the second blind-plug connector 21 and the first blind-plug connector 11 are connected through a wire. This is not limited in this embodiment.

[0057] It can be understood that in actual applications, the number of second blind-plug connectors 21 can also correspond to the number of first blind-plug connectors 11. This is not limited in this embodiment. As long as the connection method between the positive and negative poles of the battery modules inside the battery box 2 and the second blind-plug connectors 21 is adaptively modified, the battery box 2 can be connected to the external device.

[0058] It is understood that the first blind-mate connector 11 and the second blind-mate connector 21 are male and female connectors, respectively. When configuring the first blind-mate connector 11 and the second blind-mate connector 21, the first blind-mate connector 11 can protrude from the target surface, while the second blind-mate connector 21 can be embedded in the target surface. Alternatively, the first blind-mate connector 11 can be embedded in the target surface, while the second blind-mate connector 21 protrudes from the target surface. This embodiment is not limited to this.

[0059] It is understandable that Figure 3A This is a second connection diagram of an energy storage device provided in an embodiment of the present application. Figure 3B This is a structural diagram of an energy storage device provided in an embodiment of the present application. Figure 3A and Figure 3B As shown, the control box 1 can also be located below each battery box 2. In practical applications, the control box 1 can also be located in the middle of each battery box 2, which is not limited in this embodiment.

[0060] Optionally, when the control box 1 is located above each battery box 2, as shown in FIG. Figure 2A As shown, the energy storage device further includes a support leg 3, which is detachably mounted on the bottom of the battery box 2 below. The cross-sectional area of the support leg 3 increases as the distance from the battery box 2 increases. When the control box 1 is located below each battery box 2, as shown in FIG. Figure 3A As shown, the support legs 3 are detachably mounted on the bottom of the control box 1 to separate the energy storage device from the ground and avoid unnecessary damage. It is understood that when the control box 1 is located between the battery boxes 2, the support legs 3 are detachably mounted on the bottom of the bottommost battery box 2.

[0061] The energy storage device provided in this embodiment, when it needs to be connected to an external device set at a fixed position, can adjust the connection method between the control box 1 and the target battery box 2 based on the position of the external device, that is, adjust the position of the output interface 12 of the battery box 2 to make it closer to the external device, thereby effectively avoiding wire tangling and the like, and there is no need to move the entire energy storage device, effectively improving the wiring flexibility.

[0062] Figure 4 This is a wiring diagram inside a control box provided in an embodiment of the present application. Based on the previous embodiment, this embodiment further illustrates the connection method between the first blind-mate connector 11 and the outlet interface 12.

[0063] Specifically, such as Figure 4 As shown, in this embodiment, a control circuit is provided in the control box 1, and the line output interface 12 of the control box 1 specifically includes a total positive pole P+, a total negative pole P- and a COM terminal, and the corresponding first blind-plug connector 11 includes a positive pole, a negative pole and a COM terminal, wherein the COM terminal is connected through a communication line.

[0064] In this embodiment, the first blind-mate connector 11 is connected to the outlet port 12 of the control box 1 via a control circuit. The control circuit is configured to detect the loop current in the loop formed by the first blind-mate connector 11 and the outlet port 12 and, when the loop current exceeds a threshold, to limit the loop current. This effectively reduces losses caused by overcurrent when the energy storage device releases or absorbs electrical energy, thereby effectively protecting the energy storage device.

[0065] When the battery box 2 is provided with a second blind-mate connector 21 adapted to the first blind-mate connector 11, Figure 5A An electrical topology of a control circuit provided in an embodiment of the present application Figure 1 ,like Figure 5A As shown, P+ represents the total positive pole of the control box 1, P- represents the total negative pole of the control box 1, B+1 and B-1 respectively represent the positive pole and negative pole of one of the first blind-plug connectors 11, and B+2 and B-2 respectively represent the positive pole and negative pole of the other first blind-plug connector 11.

[0066] In this embodiment, the control circuit includes a first switch K1 and a second switch K2, which are arranged in a linked manner. The output interface 12 of the control box 1 includes a common positive electrode P+ and a common negative electrode P-. The first end of the first switch K1 is connected to the positive electrodes of each first blind-mate connector 11 (including B+1 and B+2), and the second end of the first switch K1 is connected to the common positive electrode P+. The first end of the second switch K2 is connected to the negative electrodes of each first blind-mate connector 11 (including B-1 and B-2), and the second end of the second switch K2 is connected to the common negative electrode P-.

[0067] In the above structure, the two first blind-mate connectors 11 of the control box 1 are both connected to the line outlet 12 . When any first blind-mate connector 11 is connected to the second blind-mate connector 21 , the battery box 2 and the control box 1 can be connected.

[0068] Specifically, through the control circuit described above, after the control box 1 and the battery box 2 are connected via any of the first blind-mate connectors 11, the first switch K1 and the second switch K2, which are arranged in a linked manner, are controlled to be closed, thereby establishing a connection between the first blind-mate connector 11 and the outlet interface 12. The linked arrangement of the first switch K1 and the second switch K2 can, on the one hand, ensure that the circuit is completely disconnected when the battery is not in use, thereby avoiding accidental short circuits or over-discharge, thereby improving safety. On the other hand, it can prevent the battery from continuously discharging when not in use, reduce the battery's self-discharge phenomenon, and thus extend the battery's service life.

[0069] In one possible design, the control circuit includes a splitter SP, a first current limiting unit, and a second current limiting unit. Specifically, the main negative electrode is connected to the negative electrode of the first blind-mate connector 11 via the splitter, and the splitter detects the loop current.

[0070] In this embodiment, the first current limiting unit includes a third switch K3, a fourth switch K4, and a resistor R. The third switch K3 connects the main positive electrode to the positive electrode of the first blind-mate connector 11, and the fourth switch K4 is connected in series with the resistor R and then connected in parallel with the third switch K3. Specifically, in this embodiment, the resistor R is a programmable resistor.

[0071] The second current limiting unit includes a fuse FA, which is connected in series between the positive electrode of the first blind-mate connector 11 and the third switch K3. Specifically, in this embodiment, the fuse FA is an electronic fuse.

[0072] Based on the first and second current-limiting units described above, when the loop current detected by the shunt is greater than a first threshold but less than a second threshold, the fourth switch K4 is controlled to close, increasing the loop load and reducing the loop current. When the loop current exceeds the second threshold, the electronic fuse is controlled to disconnect the loop to ensure safety. Furthermore, in this embodiment, a programmable resistor is used to flexibly limit the loop current. The use of an electronic fuse effectively reduces fuse replacement time and improves the applicability of the control circuit.

[0073] It is understandable that Figure 5B The second electrical topology diagram of a control circuit provided in an embodiment of the present application is as follows: Figure 5C FIG3 is an electrical topology diagram of a control circuit provided in an embodiment of the present application.

[0074] like Figure 5B and Figure 5C As shown, the control circuit can include a first switch K1, a second switch K2, a first current limiting unit, a second current limiting unit, and a shunt SP. Specifically, the first end of the first switch K1 is connected to the positive electrode of the first blind-mate connector 11, the second end of the first switch K1 is connected in series with a fuse and a third switch K3, and then connected to the total positive electrode. The fourth switch K4 and a resistor R are connected in series and then connected in parallel across the third switch K3. The first end of the second switch K2 is connected to the negative electrode of the first blind-mate connector 11, and the second end of the second switch K2 is connected in series with the shunt SP and then connected to the total negative electrode.

[0075] If the first blind-plug connector 11 corresponding to B+1 and B-1 is connected to the second blind-plug connector 21, and the line is output from the left side of the control box 1, then the electrical topology of the first blind-plug connector 11 and the line output interface 12 is as follows: Figure 5B If the first blind-mate connector 11 corresponding to B+2 and B-2 is connected to the second blind-mate connector 21, and the line is output from the right side of the control box 1, then the electrical topology of the first blind-mate connector 11 and the line output interface 12 is as follows: Figure 5C shown.

[0076] It can be understood that when two second blind-plug connectors 21 are provided in the battery box 2, each first blind-plug connector 11 of the control box 1 is connected to the line outlet interface 12 through an independent control circuit, that is, each first blind-plug connector 11 corresponds to a set of control circuits, and by controlling the corresponding linkage switch to be closed, the second blind-plug connector 21 is connected to the line outlet interface 12 through the first blind-plug connector 11, so as to realize the connection between the battery box 2 and the external device.

[0077] It is understandable that when the control box 1 is located in the middle of the battery box 2, that is, when some battery boxes 2 are stacked above the control box 1 and some battery boxes 2 are stacked below the control box 1, if the corresponding surface of the battery box 2 has only one matching second blind-mate connector 21, then each target surface has a set of control circuits, and the two first blind-mate connectors 11 on each target surface are connected to the output interface 12 through the corresponding control circuits. If the corresponding surface of the battery box 2 has two matching second blind-mate connectors 21, then each first blind-mate connector 11 corresponds to a set of control circuits, so that by controlling the closing of the corresponding linkage switch, the battery box 2 and the external device are connected through the corresponding first blind-mate connector 11.

[0078] Based on this setting, the control module can connect the battery box 2 with external devices regardless of whether it is between the battery boxes 2, on the top, or at the bottom, so that the battery modules and control modules can be stacked at will, making the control module compatible with multiple scenarios and improving the flexibility of the energy storage device.

[0079] like Figure 2A and Figure 3A As described above, in this embodiment, the first blind-mate connector 11 is embedded in the target surface of the control box 1 , the second blind-mate connector 21 protrudes from the side of the target battery box 2 facing the control box 1 , and the number of the second blind-mate connector 21 is one.

[0080] It can be understood that in the known technology, adjacent battery boxes 2 are connected by blind-plug connectors. In this embodiment, the first blind-plug connector 11 protrudes from the side of the target battery box 2 facing the control box 1, and the external structure of the battery box 2 is not changed. Therefore, there is no need to change the existing production method of the battery box 2, which is conducive to the mass production of the battery box 2.

[0081] Furthermore, in this embodiment, the number of the second blind-mate connectors 21 on the battery box 2 is kept at 1, which avoids changing the internal structure of the battery box 2 and is also beneficial for maintaining the existing production scale of the battery box 2.

[0082] Figure 6 A wiring diagram of a control box and a battery box provided in an embodiment of the present application Figure 1 , Figure 7 This is a wiring diagram of a control box and a battery box provided in an embodiment of the present application. Figure 6 and Figure 7 As shown, a control module is provided in the control box 1, and a plurality of battery modules CELL are provided in the battery box 2. The plurality of battery modules CELL are arranged in sequence along the height direction of the battery box 2, and the plurality of battery modules are connected in parallel, in series, or in mixed connection, respectively, to meet the requirements of increasing capacity, increasing voltage, or increasing capacity and voltage.

[0083] Specifically, the control module includes a battery management system (BMS). The positive terminal of the control module is connected to the positive terminal of the adjacent battery module, and the negative terminal of the control module is connected to the negative terminal of the adjacent battery module. The battery modules are connected in parallel. In addition, the control module and the battery module are both equipped with a signal transmission terminal. The signal transmission terminal of the control module is connected to the signal transmission terminal of each battery module to obtain battery data from each battery module.

[0084] The present application also provides an energy storage system, which includes at least one energy storage device. Figure 8 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, when at least two energy storage devices are provided, at least two energy storage devices are connected in parallel and then connected to an external device. Based on actual needs, if the capacity of one energy storage device is insufficient and the actual layout scenario does not support further stacking of battery boxes 2 on one energy storage device (for example, when the overall height of the energy storage device is too high, the control module is not supported, or the load-bearing capacity is insufficient), the user can connect a corresponding number of energy storage devices to the external device to form an energy storage system to achieve capacity expansion.

[0085] Furthermore, at least two energy storage devices are arranged in two rows, and the outgoing side of the control box 1 of the energy storage device in each row faces the other row, and the outgoing side is the side where the outgoing interface 12 of the control box 1 is located. For example, when the energy storage system includes two energy storage devices, the control box 1 of one energy storage device can be made to output the lines from the right side, including the total positive and total negative outputs and communication lines, and the control box 1 of the other energy storage device can be made to output the lines from the left side, including the total positive and total negative outputs and communication lines. After being connected in parallel, the other total positive and total negative outputs and communication lines of one of the control boxes 1 are connected to an external device, such as an energy storage converter, and this operation can be achieved regardless of whether the control box 1 is at the top or bottom of the energy storage device. The two energy storage devices are connected in parallel to increase capacity, with one control box 1 outputting the lines from the right side and the other control box 1 outputting the lines from the left side. Compared with two control boxes 1 outputting the lines from the same side, this can reduce the length of cables, reduce costs, and reduce user usage space, while being more beautiful and convenient.

[0086] A control box 1 is also provided in an embodiment of the present application. A control module is provided in the control box 1. The control module is used to connect to the target surface of the battery box 2 and is provided with two first blind-plug connectors 11 that are symmetrical about the center of the midpoint of the target surface. The first blind-plug connector 11 is adapted to the second blind-plug connector 21 on the battery box 2, and each first blind-plug connector 11 is used to connect to the output interface 12 of the control box 1, and the output interface 12 is used to connect to an external device.

[0087] It can be understood that the first blind-mate connector 11 can be directly connected to the outlet interface 12 through a wire, or can be connected to the outlet interface 12 through a series switch, or can be connected to the outlet interface 12 through the control circuit in the aforementioned embodiment. This is not limited in this embodiment and will not be repeated.

[0088] In the above embodiments, the description of each embodiment has its own focus. For parts not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the solutions disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0090] It should be understood that the present application is not limited to the exact structure 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 control box (1) and at least one battery box (2); the control box (1) and the at least one battery box (2) are stacked; The control box (1) is provided with two first blind-plug connectors (11) on a target surface facing a target battery box (2), and the two first blind-plug connectors (11) are symmetrical about the center of the midpoint of the target surface; a second blind-plug connector (21) adapted to the first blind-plug connector (11) is provided at a corresponding position on a surface of the target battery box (2) facing the control box (1); and the target battery box (2) is a battery box (2) adjacent to the control box (1) among the at least one battery box (2); Each of the first blind-plug connectors (11) is used to connect to an outlet interface (12) of the control box (1), and the outlet interface (12) is used to connect to an external device.

2. The energy storage device according to claim 1, characterized in that The first blind-plug connector (11) and the line outlet interface (12) of the control box (1) are connected via a control circuit; the control circuit is used to detect a loop current in a loop formed by the first blind-plug connector (11) and the line outlet interface (12), and to limit the current when the loop current is greater than a threshold value.

3. The energy storage device according to claim 2, characterized in that The outlet interface (12) of the control box (1) includes a total positive pole and a total negative pole; when the number of the second blind-plug connectors (21) is 1, the control circuit includes a first switch and a second switch, the first switch and the second switch are linked switches, the first end of the first switch is connected to the positive pole of each of the first blind-plug connectors (11), and the second end of the first switch is connected to the total positive pole; the first end of the second switch is connected to the negative pole of each of the first blind-plug connectors (11), and the second end of the second switch is connected to the total negative pole.

4. The energy storage device according to claim 2, characterized in that The output interface (12) of the control box (1) includes a total positive pole and a total negative pole; the control circuit includes a shunt, a first current limiting unit, and a second current limiting unit; the first current limiting unit includes a third switch, a fourth switch, and a resistor, and the second current limiting unit includes a fuse; The total negative electrode is connected to the negative electrode of the first blind-plug connector (11) via the shunt, and the shunt detects the loop current; The total positive electrode and the positive electrode of the first blind-plug connector (11) are connected via the third switch, and the fuse is connected in series between the positive electrode of the first blind-plug connector (11) and the third switch; the fourth switch and the resistor are connected in series and then connected in parallel with the third switch; the fourth switch is closed when the loop current is greater than a first threshold and less than a second threshold, and the fuse cuts off the loop when the loop current is greater than the second threshold.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: The first blind-mate connector (11) is embedded in the control box (1), and the second blind-mate connector (21) protrudes from a side of the target battery box (2) facing the control box (1).

6. The energy storage device according to any one of claims 2 to 4, characterized in that: In at least one battery box (2), when part of the battery boxes (2) are stacked above the control box (1) and part of the battery boxes (2) are stacked below the control box (1), the two first blind-plug connectors (11) on each target surface and the line outlet interface (12) of the control box (1) are connected via corresponding control circuits.

7. The energy storage device according to any one of claims 1 to 4, characterized in that: The battery box (2) is provided with a plurality of battery modules, the plurality of battery modules are placed in sequence along the height direction of the battery box (2), and the plurality of battery modules are connected in any of the following ways: parallel connection, series connection, and mixed connection.

8. An energy storage system, characterized in that: The energy storage system includes at least one energy storage device according to any one of claims 1 to 7; when at least two energy storage devices are provided, at least two energy storage devices are connected in parallel and then connected to an external device.

9. The energy storage system according to claim 8, characterized in that: When the energy storage system includes at least two energy storage devices, the at least two energy storage devices are arranged in two rows, and the outgoing line side of the control box (1) of the energy storage device in each row faces the other row, and the outgoing line side is the side where the outgoing line interface (12) of the control box (1) is located.

10. A control box, characterized in that: The control box (1) is provided with a control module, and the control module is used to connect to a target surface of a battery box (2). Two first blind-plug connectors (11) are provided, which are symmetrical about the center of the target surface. The first blind-plug connectors (11) are adapted to be matched with second blind-plug connectors (21) on the battery box (2), and each of the first blind-plug connectors (11) is used to be connected to an output interface (12) of the control box (1), and the output interface (12) is used to be connected to an external device.

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