High-voltage tank and energy storage device

Abstract

This application provides a high-voltage box and an energy storage device. The high-voltage box includes: a first relay, a second relay, a first fuse, and a second fuse. The first relay is adapted to control the on / off switching of the negative terminal of a first battery cluster and a converter, and has a first terminal for electrical connection to the negative terminal of the converter; the first fuse is adapted to connect the positive terminal of the first battery cluster and the converter, and has a second terminal for electrical connection to the positive terminal of the converter; the second relay is adapted to control the on / off switching of the positive terminal of a second battery cluster and the converter, and has a third terminal for electrical connection to the positive terminal of the converter; the second fuse is adapted to connect the negative terminal of the second battery cluster and the converter, and has a fourth terminal for electrical connection to the negative terminal of the converter; the first terminal of the first relay is connected to the fourth terminal of the second fuse, and the third terminal of the second relay is connected to the second terminal of the first fuse.

Description

Technical Field

[0001] This application relates to the field of electrical energy storage equipment technology, specifically to a high-voltage box and energy storage equipment. Background Technology

[0002] In related technologies, energy storage devices such as energy storage cabinets and energy storage containers often contain multiple high-voltage boxes. Each high-voltage box is connected to a corresponding battery cluster. A battery cluster control unit is located within the high-voltage box to control the battery clusters. The high-voltage box is then connected to devices such as a power conversion system (PCS). During operation, the high-voltage boxes and PCS are used to control the current, voltage, and other parameters output by each battery cluster to the power-consuming equipment. This approach requires a large number of high-voltage boxes, occupies a significant amount of space, and limits the energy density of energy storage containers and similar devices. Utility Model Content

[0003] The embodiments of this application provide a high-voltage box and an energy storage device, which can improve the technical problem of insufficient energy density of energy storage devices.

[0004] In a first aspect, embodiments of this application provide a high-pressure box, comprising:

[0005] A first relay is adapted to control the on / off state of the negative terminal of a first battery cluster and a converter, the first relay having a first terminal for electrical connection to the negative terminal of the converter;

[0006] A first fuse is adapted to connect the positive terminal of a first battery cluster and a converter, the first fuse having a second terminal for electrical connection to the positive terminal of the converter;

[0007] A second relay is adapted to control the on / off state of the positive terminal of the second battery cluster and the inverter, the second relay having a third terminal for electrical connection to the positive terminal of the inverter;

[0008] A second fuse, adapted to connect the negative terminal of the second battery cluster and the inverter, the second fuse having a fourth terminal for electrical connection to the negative terminal of the inverter;

[0009] Wherein, the first terminal of the first relay is connected to the fourth terminal of the second fuse, and the third terminal of the second relay is connected to the second terminal of the first fuse.

[0010] By integrating a first relay, a first fuse, a second relay, and a second fuse into the high-voltage box, the high-voltage box can be connected to at least two battery clusters. This reduces the space required to install each high-voltage box within the energy storage container, thus freeing up more space for the battery clusters. Furthermore, the coordination of the electronic components within the high-voltage box allows for independent control of each battery cluster, ensuring uninterrupted independent use. This approach maintains flexible charging and discharging capabilities for the battery clusters while minimizing the space occupied by each high-voltage box within the energy storage container.

[0011] In one embodiment, the high-pressure box further includes:

[0012] The positive terminal of the converter is adapted to allow the positive terminal of the converter to be electrically connected to the high-voltage box.

[0013] A battery positive terminal group is adapted to electrically connect the positive terminals of the first battery cluster and the second battery cluster to the high-voltage box.

[0014] A positive electrode busbar is connected between the positive terminal of the inverter and the positive terminal group of the battery;

[0015] The first fuse is connected to the positive port of the inverter and the positive port group of the battery through the positive conductor bus, and the second relay is connected to the positive port of the inverter and the positive port group of the battery through the positive conductor bus.

[0016] The positive terminals of the first and second battery clusters are electrically connected to the high-voltage box via battery positive terminal groups. Specifically, they are connected to components such as the first fuse and second relay in the high-voltage box, and then electrically connected to the positive terminal of the inverter via these components. This achieves the connection between the positive terminals of each battery cluster and the high-voltage box. Multiple battery clusters are connected to the same inverter positive terminal, allowing for easy disconnection of the inverter positive terminal from multiple battery clusters at once through other settings. After the negative terminals of the battery clusters are connected to the high-voltage box, the electrical connection between each battery cluster and the components of the high-voltage box is achieved, enabling the high-voltage box to control the charging and discharging process of each battery cluster.

[0017] In one embodiment, the battery positive terminal group includes:

[0018] The first positive terminal is adapted to be electrically connected to the positive terminal of the first battery cluster;

[0019] The second positive terminal is adapted to be electrically connected to the positive terminal of the second battery cluster;

[0020] The positive electrode conductive busbar includes:

[0021] The first conductive busbar is connected between the first fuse and the first positive terminal.

[0022] The second conductive bus is connected between the second relay and the second positive terminal;

[0023] Wherein, the surface area of ​​the first conductive bus connected to the first fuse is greater than the surface area of ​​the second conductive bus connected to the second relay.

[0024] The above solution increases the surface area of ​​the first conductive busbar near the fuse, which helps to improve the heat dissipation of the first conductive busbar and thus reduces the possibility of the first fuse blowing unexpectedly.

[0025] In one embodiment, the positive electrode conductive busbar further includes:

[0026] A first common positive electrode busbar is connected to the second terminal of the first fuse and the third terminal of the second relay;

[0027] The second common positive electrode busbar is connected to the positive terminal of the converter;

[0028] The high-pressure box also includes:

[0029] The main circuit breaker is connected between the first common positive conductor and the second common positive conductor to control the on / off state of the first common positive conductor and the second common positive conductor.

[0030] By setting a main circuit breaker, in addition to being able to independently disconnect the second battery pack and the positive terminal of the converter using the second relay, the main circuit breaker can also simultaneously disconnect the positive terminal of the first battery pack from the positive terminal of the converter, and the positive terminal of the second battery pack from the positive terminal of the converter, so that the high-voltage box can be de-energized and safety can be guaranteed.

[0031] In one embodiment, the high-pressure box further includes:

[0032] The converter negative terminal is adapted to allow the converter negative terminal to be electrically connected to the high-voltage box.

[0033] The battery negative terminal group is adapted to allow the negative terminals of the first battery cluster and the second battery cluster to be electrically connected to the high-voltage box.

[0034] A negative electrode busbar is connected between the negative terminal of the inverter and the negative terminal group of the battery;

[0035] The second fuse is connected to the negative terminal of the inverter and the negative terminal of the battery via the negative terminal busbar, and the first relay is connected to the negative terminal of the inverter and the negative terminal of the battery via the negative terminal busbar.

[0036] As exemplified above, the negative terminals of the first and second battery clusters are electrically connected to the high-voltage box via battery negative terminal ports, specifically to components such as the second fuse and the first relay in the high-voltage box, and then electrically connected to the negative terminal port of the inverter via these components, thereby realizing the connection between the negative terminals of each battery cluster and the high-voltage box.

[0037] In one embodiment, the battery negative terminal group includes:

[0038] The first negative terminal is adapted to be electrically connected to the negative terminal of the first battery cluster;

[0039] The second negative terminal is suitable for electrical connection to the negative terminal of the second battery cluster;

[0040] The negative electrode conductive busbar includes:

[0041] The third conductive busbar is connected between the first relay and the first negative terminal.

[0042] The fourth conductive busbar is connected between the second fuse and the second negative terminal.

[0043] The surface area of ​​the fourth conductive busbar connected to the second fuse is greater than the surface area of ​​the third conductive busbar connected to the first relay.

[0044] The above solution increases the surface area of ​​the fourth conductive busbar near the second fuse, which helps to improve the heat dissipation of the fourth conductive busbar and thus reduces the possibility of the second fuse blowing unexpectedly.

[0045] In one embodiment, the negative electrode conductive busbar further includes:

[0046] A first common negative electrode busbar is connected to the fourth terminal of the second fuse and the first terminal of the first relay;

[0047] The second common negative electrode busbar is connected to the negative electrode port of the converter;

[0048] The main circuit breaker is connected between the first common negative conductor and the second common negative conductor to control the on / off state of the first common negative conductor and the second common negative conductor.

[0049] The above settings can further utilize the disconnection of the electrical connection between the first negative port, the second negative port and the converter negative port when the main circuit breaker operates, which can further improve the safety of the high-voltage box in some application scenarios.

[0050] In one embodiment, the third conductive bus includes:

[0051] The first connecting segment is connected to the first relay;

[0052] The second connection segment is connected to the first negative terminal port;

[0053] The high-pressure box also includes:

[0054] A first splitter is connected between the first connecting segment and the second connecting segment;

[0055] And / or, the fourth conductive bus includes:

[0056] The third connecting section is connected to the second fuse;

[0057] The fourth connection segment is connected to the second negative terminal port;

[0058] The high-pressure box also includes:

[0059] The second splitter is connected between the third and fourth connecting sections.

[0060] By setting up the first shunt and the second shunt, it is easy to detect the current value of the circuit where the first battery cluster and the second battery cluster are located, so as to adjust the output of the first battery cluster and the second battery cluster as needed.

[0061] In one embodiment, at least a portion of the positive electrode busbar and at least a portion of the negative electrode busbar are arranged in layers inside the high-voltage box.

[0062] The scheme of layering the positive and negative conductor busbars ensures that they work relatively independently and avoids short circuits in the high-voltage box. At the same time, it makes full use of the internal space of the high-voltage box to arrange the positive and negative conductor busbars. The spatial integration of the internal components of the high-voltage box is higher, which can be used to reduce the overall volume of the high-voltage box.

[0063] In one embodiment, the high-voltage box has an external end face;

[0064] The converter positive terminal, the converter negative terminal, the battery positive terminal group, and the battery negative terminal group are all located on the external end face of the high voltage box.

[0065] This setup facilitates the centralized installation of wiring harnesses from the external end face of the high-voltage box, which are connected to the positive terminal of the inverter, the negative terminal of the inverter, the positive terminal group of the battery, and the negative terminal group of the battery.

[0066] In one embodiment, both the converter positive port and the converter negative port are located on the first side of the external terminal face; both the battery positive port group and the battery negative port group are located on the second side of the external terminal face opposite to the first side.

[0067] The above settings separate the inverter-related interfaces from the battery cluster-related interfaces, making it easier for users to distinguish and connect them.

[0068] In one embodiment, the high-pressure box further includes:

[0069] The first equalization branch is connected in parallel with the first relay, and the first equalization branch includes a first resistor and a third relay connected in series.

[0070] And / or, the high-voltage box further includes:

[0071] The second balancing branch is connected in parallel with the second relay. The second balancing branch includes a second resistor and a fourth relay connected in series.

[0072] The first and second equalization branches are designed to improve the stability of the first and second battery clusters during charging and discharging, and to avoid energy loss caused by excessive voltage difference during charging and discharging.

[0073] In one embodiment, the high-pressure box further includes:

[0074] The battery management module includes multiple battery cluster control units;

[0075] At least some of the battery cluster control units are arranged in layers inside the high-voltage box; inside the high-voltage box, the area where the first relay, the first fuse, the second relay, and the second fuse are located is located on the periphery of the battery management module.

[0076] Each battery cluster control unit can be electrically connected to the first battery cluster, the second battery cluster, etc., to control the charging and discharging processes of the first and second battery clusters. The hierarchical arrangement of the battery cluster control units makes full use of the internal space of the voltage box. Each battery cluster control unit operates independently, facilitating separate control of the first and second battery clusters. The relative positions of components such as the first relay, first fuse, second relay, and second fuse to the battery management module facilitate wiring, and the heat generated by these components during operation has minimal impact on the battery management module, contributing to its stable operation.

[0077] Secondly, embodiments of this application provide an energy storage device, including the high-voltage box as described above.

[0078] The beneficial effects of the embodiments of this application are as follows:

[0079] In the embodiments of this application, by integrating a first relay, a first fuse, a second relay, and a second fuse into the high-voltage box, the high-voltage box can be connected to at least two battery clusters. This reduces the space required for installing each high-voltage box in the energy storage device, thus freeing up more space for the battery clusters. Furthermore, the coordination of the electronic components within the high-voltage box enables independent control of each battery cluster, ensuring uninterrupted independent use. This approach reduces the space occupied by each high-voltage box within the energy storage device while maintaining flexible charging and discharging of the battery clusters, thereby addressing the technical problem of insufficient energy density in energy storage devices. Attached Figure Description

[0080] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0081] Figure 1 This is a perspective view of the high-voltage box provided in an embodiment of this application;

[0082] Figure 2 yes Figure 1 A three-dimensional schematic diagram of some structures in the high-voltage box shown;

[0083] Figure 3 yes Figure 1 The diagram shows the topology of the circuit section in the high-voltage box.

[0084] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the structure shown from another perspective;

[0085] Figure 5 yes Figure 2 A three-dimensional schematic diagram of a portion of the structure shown.

[0086] Explanation of reference numerals in the attached figures:

[0087] 100. High-voltage box; 100a. External connection face;

[0088] 101, First relay; a1, First terminal;

[0089] 102. First fuse; a2. Second terminal;

[0090] 103, Second relay; a3, Third terminal;

[0091] 104. Second fuse; a4. Fourth terminal;

[0092] 105. Shell; 105a. Accommodation space;

[0093] 106. Converter positive terminal;

[0094] 107. Battery positive terminal group; 107a. First positive terminal; 107b. Second positive terminal;

[0095] 108. Positive electrode conductive bus group; 108a. First conductive bus; 108b. Second conductive bus; 108c. First common positive electrode conductive bus; 108d. Second common positive electrode conductive bus;

[0096] 109. Negative terminal of the converter;

[0097] 110. Battery negative terminal group; 110a. First negative terminal; 110b. Second negative terminal;

[0098] 111, Negative electrode conductive busbar group; 111a, Third conductive busbar; 111b, Fourth conductive busbar; 111c, First common negative electrode conductive busbar; 111d, Second common negative electrode conductive busbar; 111e, First connecting section; 111f, Second connecting section; 111g, Third connecting section; 111h, Fourth connecting section;

[0099] 112. Main circuit breaker;

[0100] 113. First shunt;

[0101] 114. Second shunt;

[0102] 115, First equalization branch; 115a, First resistor; 115b, Third relay;

[0103] 116, Second equalization branch; 116a, Second resistor; 116b, Fourth relay;

[0104] 117. Battery Management Module; 117a. Battery Cluster Control Unit;

[0105] 118. Hall effect current sensor;

[0106] 119. Communication interface;

[0107] 120. Push-button switch;

[0108] 121. Partition;

[0109] 122. Handle;

[0110] A1, First side; A2, Second side;

[0111] 200, First battery cluster; 300, Second battery cluster; 400, Inverter. Detailed Implementation

[0112] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0113] Reference Figures 1 to 5 As shown, the high-voltage box 100 provided in the first aspect of this application is suitable for integration into equipment such as energy storage containers, and forms an electrical connection with the battery cluster for checking and controlling the operating status of the battery cluster. The high-voltage box 100 is also suitable for connection to equipment such as an inverter 400, so as to change parameters such as the current output by the battery cluster through the inverter 400 or similar equipment. (Refer to...) Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the high-voltage box 100 includes: a first relay 101, a second relay 103, a first fuse 102, and a second fuse 104.

[0114] The first relay 101 is adapted to control the on / off state of the negative terminal of the first battery cluster 200 and the inverter 400. That is, in the circuit including the first battery cluster 200 and the inverter 400, the first relay 101 is disposed between the negative terminal of the first battery cluster 200 and the inverter 400. The first relay 101 can cut off or conduct the current transmission between the negative terminal of the first battery cluster 200 and the inverter 400 through its own action.

[0115] The first fuse 102 is adapted to connect the positive terminal of the first battery cluster 200 and the inverter 400. That is, in the circuit including the first battery cluster 200 and the inverter 400, the first fuse 102 is located between the positive terminal of the first battery cluster 200 and the inverter 400. When a fault such as a short circuit occurs in the circuit, the first fuse 102 melts and breaks, thereby cutting off the current transmission between the first battery cluster 200 and the inverter 400, ensuring safe use.

[0116] The second relay 103 is adapted to control the on / off state of the positive terminal of the second battery cluster 300 and the inverter 400. That is, in the circuit including the second battery cluster 300 and the inverter 400, the second relay 103 is disposed between the positive terminal of the second battery cluster 300 and the inverter 400. The second relay 103 can cut off or connect the current transmission between the negative terminal of the second battery cluster 300 and the inverter 400 through its own action.

[0117] The second fuse 104 is adapted to connect the negative terminal of the second battery cluster 300 and the inverter 400. That is, in the circuit including the second battery cluster 300 and the inverter 400, the second fuse 104 is located between the positive terminal of the second battery cluster 300 and the inverter 400. When a fault such as a short circuit occurs in the circuit, the second fuse 104 melts and breaks, thereby cutting off the current transmission between the second battery cluster 300 and the inverter 400, ensuring safe use.

[0118] Reference Figure 1 and Figure 2 As shown, the high-voltage box 100 may specifically include a housing 105, within which a receiving space 105a is formed. The first relay 101, the second relay 103, the first fuse 102, and the second fuse 104 may be specifically integrated within the receiving space 105a. That is, the first relay 101, the second relay 103, the first fuse 102, and the second fuse 104 are installed inside the high-voltage box 100 to obtain protection and isolation from the outside. It is understood that the first battery cluster 200 and the second battery cluster 300 refer to two battery clusters integrated in energy storage devices such as energy storage containers and energy storage cabinets. In other words, the high-voltage box 100 provided in this application can be connected to at least two battery clusters.

[0119] Specifically, refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the first relay 101 has a first terminal a1 for electrical connection to the negative terminal of the converter 400, the first fuse 102 has a second terminal a2 for electrical connection to the positive terminal of the converter 400, the second relay 103 has a third terminal a3 for electrical connection to the positive terminal of the converter 400, and the second fuse 104 has a fourth terminal a4 for electrical connection to the negative terminal of the converter 400. The first terminal a1 of the first relay 101 is connected to the fourth terminal a4 of the second fuse 104, and the third terminal a3 of the second relay 103 is connected to the second terminal a2 of the first fuse 102.

[0120] By integrating the first relay 101, the first fuse 102, the second relay 103, and the second fuse 104 into the high-voltage box 100, the high-voltage box 100 can be connected to at least two battery clusters. This reduces the space required to install each high-voltage box 100 in the energy storage device, thus freeing up more space for battery clusters. Furthermore, the coordination of the electronic components within the high-voltage box 100 allows for independent control of each battery cluster, ensuring uninterrupted independent use. The circuits containing the first battery cluster 200 and the second battery cluster 300 are equipped with the first fuse 102 and the second fuse 104, respectively. This approach ensures flexible and safe charging and discharging of the battery clusters while reducing the space occupied by each high-voltage box 100 within the energy storage device.

[0121] In one embodiment, reference is made to Figure 1 and Figure 2 As shown, the high-voltage box 100 also includes: a converter positive terminal 106, a battery positive terminal group 107, a positive electrode busbar group 108, a converter negative terminal 109, a battery negative terminal group 110, and a negative electrode busbar group 111.

[0122] The converter positive port 106 is adapted to provide an electrical connection between the positive terminal of the converter 400 and the high-voltage box 100. The battery positive port group 107 is adapted to provide an electrical connection between the positive terminals of the first battery cluster 200 and the second battery cluster 300 and the high-voltage box 100. Thus, the positive terminals of the first battery cluster 200 and the second battery cluster 300 can be connected to the battery positive port group 107 via wires, and the positive terminal of the converter 400 can be connected to the converter positive port 106 via wires. The positive electrode busbar group 108 can be, for example, an integral assembly of multiple copper busbars for conducting electricity, and the conductive components in the positive electrode busbar group 108 can also be made of other conductive materials.

[0123] The positive electrode busbar 108 is connected between the positive terminal 106 of the inverter and the positive terminal 107 of the battery, enabling the positive terminal 106 of the inverter and the positive terminal 107 of the battery to conduct through the positive electrode busbar 108. (Refer to...) Figure 1 , Figure 2 and Figure 4 As shown, the first fuse 102 is connected to the positive port 106 of the inverter and the positive port group 107 of the battery via the positive conductor bus 108, thereby providing protection between the first battery cluster 200 and the inverter 400. The second relay 103 is connected to the positive port 106 of the inverter and the positive port group 107 of the battery via the positive conductor bus 108, thereby controlling the on / off of current transmission between the second battery cluster 300 and the inverter 400.

[0124] The positive terminals of the first battery cluster 200 and the second battery cluster 300 are electrically connected to the high-voltage box 100 via the battery positive terminal port group 107. Specifically, they are connected to components such as the first fuse 102 and the second relay 103 in the high-voltage box 100, and then electrically connected to the positive terminal port 106 of the inverter via these components. This achieves the connection between the positive terminal of each battery cluster and the high-voltage box 100. Multiple battery clusters are connected to the same inverter positive terminal port 106, which allows for easy disconnection of the inverter positive terminal port 106 from multiple battery clusters through other settings. After the negative terminal of the battery cluster is connected to the high-voltage box 100, the electrical connection between each battery cluster and the components of the high-voltage box 100 is achieved, enabling the high-voltage box 100 to control the charging and discharging process of each battery cluster.

[0125] Accordingly, refer to Figure 1 , Figure 2 and Figure 5 As shown, the inverter negative port 109 is adapted to provide an electrical connection between the negative terminal of the inverter 400 and the high-voltage box 100, and the battery negative port group 110 is adapted to provide an electrical connection between the negative terminals of the first battery cluster 200 and the second battery cluster 300 and the high-voltage box 100. Thus, the negative terminals of the first battery cluster 200 and the second battery cluster 300 can be connected to the battery negative port group 110 via wires, and the negative terminal of the inverter 400 can be connected to the inverter negative port 109 via wires. The negative electrode busbar group 111 can be, for example, an integral assembly of multiple copper busbars for conducting electricity, and the conductive components in the negative electrode busbar group 111 can also be made of other conductive materials. The negative electrode busbar group 111 is connected between the inverter negative port 109 and the battery negative port group 110, enabling the inverter negative port 109 and the battery negative port group 110 to conduct electricity through the negative electrode busbar group 111.

[0126] The second fuse 104 is connected to the negative port 109 of the inverter and the negative port group 110 of the battery via the negative conductor bus 111, thereby providing protection between the second battery cluster 300 and the inverter 400. The first relay 101 is connected to the negative port 109 of the inverter and the negative port group 110 of the battery via the negative conductor bus 111, thereby controlling the on / off of current transmission between the first battery cluster 200 and the inverter 400.

[0127] As exemplified above, the negative terminals of the first battery cluster 200 and the second battery cluster 300 are electrically connected to the high-voltage box 100 via the battery negative terminal port group 110, specifically to components such as the second fuse 104 and the first relay 101 in the high-voltage box 100, and then electrically connected to the inverter negative terminal port 109 via these components, thus connecting the negative terminals of each battery cluster to the high-voltage box 100. Multiple battery clusters are connected to the same inverter negative terminal port 109, allowing for easy disconnection of the inverter negative terminal port 109 from multiple battery clusters through other settings.

[0128] As a specific embodiment, the battery positive terminal port group 107 includes: a first positive terminal port 107a and a second positive terminal port 107b. The positive electrode busbar group 108 includes: a first busbar 108a and a second busbar 108b.

[0129] The first positive port 107a is adapted to be electrically connected to the positive terminal of the first battery cluster 200. The second positive port 107b is adapted to be electrically connected to the positive terminal of the second battery cluster 300. Specifically, the first positive port 107a and the second positive port 107b can be connection terminals, plugs, interfaces, etc., disposed on the housing 105, forming a structure on the high-voltage box 100 specifically connected to the positive terminals of the first battery cluster 200 and the second battery cluster 300. The first conductive bus 108a is connected between the first fuse 102 and the first positive port 107a to connect the first fuse 102 to the circuit containing the first battery cluster 200. The second conductive bus 108b is connected between the second relay 103 and the second positive port 107b to connect the second relay 103 to the circuit containing the second battery cluster 300.

[0130] In some embodiments of this application, the surface area of ​​the end of the first conductive busbar 108a connected to the first fuse 102 can be specified to be greater than the surface area of ​​the end of the second conductive busbar 108b connected to the second relay 103. The calculation of the surface area of ​​either the end of the first conductive busbar 108a connected to the first fuse 102 or the end of the second conductive busbar 108b connected to the second relay 103 can be achieved by limiting variables. For example, the surface area of ​​the first conductive busbar 108a at the end connected to the first fuse 102 can be calculated by taking a specific length (e.g., 10 cm) along the extension direction of the first conductive busbar 108a, using the end face of the second conductive busbar 108a connected to the first fuse 102 as a reference. Similarly, the surface area of ​​the first conductive busbar 108a at the aforementioned specific length can be calculated by taking the end face of the second conductive busbar 108b connected to the second circuit breaker as a reference, along the extension direction of the second conductive busbar 108b.

[0131] Furthermore, considering that conductive busbars are often configured as long strips in practical applications, when calculating the surface area of ​​the end of the first conductive busbar 108a connected to the first fuse 102 and the surface area of ​​the end of the second conductive busbar 108b connected to the second relay 103, the aforementioned specific length can be used as the length of the end of the first conductive busbar 108a connected to the first fuse 102, and the width of the first conductive busbar 108a can be used as the width of the end of the first conductive busbar 108a connected to the first fuse 102. The product of the length of the end of the first conductive busbar 108a connected to the first fuse 102 and the width of the end of the first conductive busbar 108a connected to the first fuse 102 is calculated, and the obtained value is used as the surface area of ​​the end of the first conductive busbar 108a connected to the first fuse 102.

[0132] Accordingly, the aforementioned specific length can be used as the length of one end of the second conductive busbar 108b connected to the second relay 103, and the width of the second conductive busbar 108b can be used as the width of one end of the second conductive busbar 108b connected to the second relay 103. The product of the length of one end of the second conductive busbar 108b connected to the second relay 103 and the width of one end of the second conductive busbar 108b connected to the second relay 103 can be calculated, and the obtained value can be used as the surface area of ​​one end of the second conductive busbar 108b connected to the second relay 103.

[0133] In the above scheme, by limiting the relative values ​​of the surface areas of the first conductive bus 108a and the second conductive bus 108b, since in practical applications, the second conductive bus 108b often needs to have sufficient surface area to ensure its heat dissipation effect and the connection strength with the first contactor meet the usage requirements, the above scheme is equivalent to increasing the surface area of ​​the first conductive bus 108a near the fuse, which is beneficial to improving the heat dissipation of the first conductive bus 108a. The first fuse 102 can also use the first conductive bus 108a for heat dissipation, which avoids abnormal heat accumulation in the vicinity of the first fuse 102, thereby reducing the possibility of the first fuse 102 accidentally blowing, and enabling the circuit where the first fuse 102 is located to stably transmit current during normal use.

[0134] For more specific solutions, refer to Figure 2 and Figure 4 As shown, the positive electrode busbar group 108 further includes: a first common positive electrode busbar 108c and a second common positive electrode busbar 108d. The high-voltage box 100 also includes: a main circuit breaker 112.

[0135] The first common positive busbar 108c is connected to the second terminal a2 of the first fuse 102 and the third terminal a3 of the second relay 103, so that in the circuit containing the first fuse 102 and the second relay 103, the first fuse 102 and the second relay 103 can be connected to the positive port 106 of the converter through the first common positive busbar 108c. The second common positive busbar 108d is connected to the positive port 106 of the converter. The main circuit breaker 112 is connected between the first common positive busbar 108c and the second common positive busbar 108d to control the on / off state of the first common positive busbar 108c and the second common positive busbar 108d, so that the first fuse 102 and the second relay 103 can be connected to the positive port 106 of the converter through the first common positive busbar 108c, the main circuit breaker 112 and the second common positive busbar 108d.

[0136] Therefore, in addition to being able to independently disconnect the second battery cluster 300 and the converter positive port 106 using the second relay 103, the main circuit breaker 112 can also be used to simultaneously disconnect the positive terminal of the first battery cluster 200 from the converter positive port 106 and the positive terminal of the second battery cluster 300 from the converter positive port 106, so that the high voltage box 100 can be de-energized and safety can be guaranteed.

[0137] As a specific example, refer to Figure 2 and Figure 5 As shown, the battery negative terminal port group 110 includes: a first negative terminal port 110a and a second negative terminal port 110b. The negative electrode busbar group 111 includes: a third busbar 111a and a fourth busbar 111b.

[0138] The first negative port 110a is adapted to be electrically connected to the negative terminal of the first battery cluster 200, and the second negative port 110b is adapted to be electrically connected to the negative terminal of the second battery cluster 300. Specifically, the first negative port 110a and the second negative port 110b can be connection terminals, plugs, interfaces, etc., disposed on the housing 105, forming a structure on the high-voltage box 100 specifically connected to the negative terminals of the first battery cluster 200 and the second battery cluster 300. The third conductive bus 111a is connected between the first relay 101 and the first negative port 110a to connect the first relay 101 to the circuit containing the first battery cluster 200. The fourth conductive bus 111b is connected between the second fuse 104 and the second negative port 110b to connect the second fuse 104 to the circuit containing the second battery cluster 300.

[0139] In some embodiments of this application, the surface area of ​​the end of the fourth conductive bus 111b connected to the second fuse 104 may be greater than the surface area of ​​the end of the third conductive bus 111a connected to the first relay 101. Referring to the foregoing description, the surface area of ​​the end of the fourth conductive bus 111b connected to the second fuse 104 can be determined with reference to the method described above for determining the surface area of ​​the end of the first conductive bus 108a connected to the first fuse 102, and the surface area of ​​the third conductive bus 111a connected to the end of the second relay 103 can be determined with reference to the method described above for determining the surface area of ​​the end of the second conductive bus 108b connected to the first relay 101. This scheme, by limiting the relative surface areas of the third conductive busbar 111a and the fourth conductive busbar 111b, effectively increases the surface area of ​​the fourth conductive busbar 111b near the second fuse 104, which is beneficial for improving the heat dissipation of the fourth conductive busbar 111b. The first fuse 102 can also use the first conductive busbar 108a for heat dissipation, avoiding abnormal heat accumulation in the area near the second fuse 104, thereby reducing the possibility of the second fuse 104 blowing unexpectedly. This allows the circuit containing the second fuse 104 to stably transmit current during normal use, further reducing the possibility of the second fuse 104 blowing unexpectedly.

[0140] For more specific solutions, refer to Figure 2 and Figure 5 As shown, the negative electrode conductive bus group 111 further includes: a first common negative electrode conductive bus 111c and a second common negative electrode conductive bus 111d.

[0141] The first common negative busbar 111c connects the fourth terminal a4 of the second fuse 104 and the first terminal a1 of the first relay 101, such that in the circuit containing the first relay 101 and the second fuse 104, the first relay 101 and the second fuse 104 can be connected to the converter negative port 109 via the first common negative busbar 111c. The second common negative busbar 111d is connected to the converter negative port 109. The main circuit breaker 112 is connected between the first common negative busbar 111c and the second common negative busbar 111d to control the on / off state of the first common negative busbar 111c and the second common negative busbar 111d, such that the first relay 101 and the second fuse 104 can be connected to the converter negative port 109 via the first common negative busbar 111c, the main circuit breaker 112, and the second common negative busbar 111d.

[0142] The above configuration can further utilize the operation of the main circuit breaker 112 to disconnect the electrical connection from the first negative port 110a and the second negative port 110b to the converter negative port 109, which can further improve the safety of the high voltage box 100 in some application scenarios.

[0143] The high-voltage box 100 integrates a greater number of conductive busbars to achieve a more complex circuit configuration required for matching and connecting more battery clusters. This results in a larger number of conductive busbars within the high-voltage box 100. In one embodiment, at least a portion of the positive electrode conductive busbar group 108 and at least a portion of the negative electrode conductive busbar group 111 are arranged in layers within the high-voltage box 100. More specifically, refer to... Figure 2 and Figure 5 As shown, for example, at least a portion of the first conductive bus 108a and at least a portion of the third conductive bus 111a can be layered together, and at least a portion of the second conductive bus 108b and at least a portion of the fourth conductive bus 111b can be layered together.

[0144] The layered arrangement of the positive electrode busbar 108 and the negative electrode busbar 111 ensures that they operate relatively independently and avoids short circuits within the high-voltage box 100. At the same time, it makes full use of the internal space of the high-voltage box 100 to arrange the positive electrode busbar 108 and the negative electrode busbar 111. The spatial integration of the internal components of the high-voltage box 100 is higher, which can be used to reduce the overall volume of the high-voltage box 100. Based on connecting at least two battery clusters in one high-voltage box 100, the volume of the high-voltage box 100 itself is further limited. The overall volume of energy storage containers and other equipment can be made smaller, or more battery clusters can be set in the same volume, thereby further improving the energy density of energy storage containers and other equipment.

[0145] Specifically, refer to Figure 2 and Figure 5 As shown, the high-voltage box 100 may include a partition 121, which is fixed within the receiving space 105a and is at least partially located between the layers of the positive electrode conductive busbar group 108 and the negative electrode conductive busbar group 111, i.e., the partition 121 is at least partially located between the positive electrode conductive busbar group 108 and the negative electrode conductive busbar group 111. In a more specific embodiment, for example, when at least a portion of the first conductive busbar 108a and at least a portion of the third conductive busbar 111a are arranged in layers, the partition 121 is at least partially located between the first conductive busbar 108a and the third conductive busbar 111a. The partition can be used to block the first conductive busbar 108a and the third conductive busbar 111a, and the first conductive busbar 108a or the third conductive busbar 111a can be fixed on the partition 121, which provides support.

[0146] More functions can be achieved by adding more components to the high-voltage box 100. For example, refer to... Figure 3 and Figure 5 As shown, the high-voltage box 100 also includes a first shunt 113. Specifically, the third conductor bus 111a includes a first connecting section 111e and a second connecting section 111f.

[0147] The first connecting segment 111e is connected to the first relay 101, and the second connecting segment 111f is connected to the first negative port 110a. Connecting the first connecting segment 111e to the second connecting segment 111f establishes the electrical connection between the first negative port 110a and the first relay 101. A first shunt 113 is connected between the first connecting segment 111e and the second connecting segment 111f, connecting both segments. The first shunt 113 can also be used to detect the current in the circuit containing the first battery cluster 200.

[0148] Or, refer to Figure 3 and Figure 5As shown, the high-voltage box 100 also includes a second shunt 114. Specifically, the fourth conductor bus 111b includes a third connecting section 111g and a fourth connecting section 111h. The third connecting section 111g is connected to the second fuse 104. The fourth connecting section 111h is connected to the second negative terminal 110b. After the third connecting section 111g is connected to the fourth connecting section 111h, the electrical connection between the second negative terminal 110b and the second fuse 104 is established. The second shunt 114 is connected between the third connecting section 111g and the fourth connecting section 111h, connecting the third connecting section 111g and the fourth connecting section 111h. The second shunt 114 can also be used to detect the current in the circuit containing the second battery cluster 300.

[0149] In this way, by setting the first shunt 113 and the second shunt 114, it is easy to detect the current value of the circuit where the first battery cluster 200 and the second battery cluster 300 are located, so that the output of the first battery cluster 200 and the second battery cluster 300 can be adjusted as needed to match the current value of the circuit with the power demand.

[0150] In one embodiment, reference is made to Figure 3 and Figure 4 As shown, the high-voltage box 100 also includes a first balancing branch 115. The first balancing branch 115 is connected in parallel with the first relay 101. Specifically, the first balancing branch 115 includes a first resistor 115a and a third relay 115b connected in series. In a more specific embodiment, wires (not shown) are used between the first resistor 115a and the third relay 115b, between the first resistor 115a and the second common negative terminal bus 111d, and between the third relay 115b and the second common negative terminal bus 111d. For example, the first resistor 115a is connected between the first negative terminal 110a and the third relay 115b. During the charging and discharging process of the first battery cluster 200 and the second battery cluster 300, if the voltage difference between the first battery cluster 200 and the second battery cluster 300 is large, with the first equalization branch 115 provided, the resistance value of the circuit where the first battery cluster 200 is located can be adjusted by disconnecting the first relay 101 and connecting the third relay 115b, or by connecting the first relay 101 and disconnecting the third relay 115b, so that the voltage difference between the first battery cluster 200 and the second battery cluster 300 tends to decrease, thereby reducing the crosstalk between the first battery cluster 200 and the second battery cluster 300.

[0151] For example, refer to Figure 3 and Figure 4As shown, the high-voltage box 100 may also include a second equalization branch 116. The second equalization branch 116 is connected in parallel with the second relay 103. Specifically, the second equalization branch 116 includes a second resistor 116a and a fourth relay 116b connected in series. More specifically, the second resistor 116a and the fourth relay 116b, the second resistor 116a and the second common positive terminal bus 108d, and the fourth relay 116b and the second common positive terminal bus 108d are connected by wires (not shown in the figure). For example, the second resistor 116a is connected between the second positive terminal 107b and the fourth relay 116b. With the second equalization branch 116 provided, the resistance value of the circuit where the first battery cluster 200 is located can be adjusted by disconnecting the second relay 103 and connecting the fourth relay 116b, or by connecting the second relay 103 and disconnecting the fourth relay 116b, so that the voltage difference between the first battery cluster 200 and the second battery cluster 300 tends to decrease, thereby reducing the crosstalk between the first battery cluster 200 and the second battery cluster 300.

[0152] In this way, the first equalization branch 115 and the second equalization branch 116 are set to improve the stability of the first battery cluster 200 and the second battery cluster 300 during the charging and discharging process, and avoid energy loss caused by excessive voltage difference during the charging and discharging process.

[0153] In one embodiment, reference is made to Figure 2 As shown, the high-voltage box 100 also includes a battery management module 117. The battery management module 117 includes multiple battery cluster management units 117a. Each battery cluster management unit 117a (SBMU) integrates electronic components such as control chips and is responsible for managing the energy distribution and safety monitoring of the battery clusters in the energy storage system. Specifically, the battery cluster management unit 117a can be electrically connected to, for example, the aforementioned first relay 101, second relay 103, third relay 115b, fourth relay 116b, main circuit breaker 112, first shunt 113, and second shunt 114, to control the operation of these components in case of overcurrent, short circuit, or other abnormalities in the circuit containing the first battery cluster 200 and the second battery cluster 300, or when the voltage difference between the first battery cluster 200 and the second battery cluster 300 is too large, ensuring the safety and stability of the first battery cluster 200 and the second battery cluster 300.

[0154] At least some of the battery cluster control units 117a are arranged in layers inside the high-voltage box 100; inside the high-voltage box 100, the areas where the first relay 101, the first fuse 102, the second relay 103 and the second fuse 104 are located are on the periphery of the battery management module 117.

[0155] Each battery cluster control unit 117a can be electrically connected to the first battery cluster 200, the second battery cluster 300, etc., to control the charging and discharging processes of the first battery cluster 200 and the second battery cluster 300. The layered arrangement of the battery cluster control units 117a makes full use of the internal space of the voltage box. The use of each battery cluster control unit 117a is independent, which facilitates the separate control of the operation of the first battery cluster 200 and the second battery cluster 300. The relative positions of components such as the first relay 101, the first fuse 102, the second relay 103, and the second fuse 104 with the battery management module 117 facilitate the wiring of each component, and the heat generated by each component during operation has a small impact on the battery management module 117, which is conducive to the stable operation of the battery management module 117.

[0156] In one embodiment, the high-voltage box 100 further includes a first temperature sensor. This first temperature sensor is used to detect the temperature of the space surrounding the first fuse 102. Specifically, the first temperature sensor is, for example, an inductive temperature sensor. If a non-electrical fault causes the first fuse 102 to blow, the temperature data detected by the first temperature sensor can be retrieved. By comparing the temperature surrounding the first fuse 102 with the melting temperature of the first fuse 102, it is possible to indirectly analyze whether thermal shock is the cause of the unexpected melting of the second fuse 104, facilitating fault diagnosis. More specifically, the distance between the first temperature sensor and the first fuse 102 ranges from 10mm to 30mm. The first temperature sensor is not shown in the figure.

[0157] For example, the high-voltage box 100 may further include a second temperature sensor. This second temperature sensor is used to detect the temperature of the space surrounding the second fuse 104. Specifically, the second temperature sensor is, for example, an inductive temperature sensor. If a non-electrical fault causes the second fuse 104 to blow, the temperature data detected by the second temperature sensor can be retrieved. By comparing the temperature surrounding the second fuse 104 with the melting temperature of the second fuse 104, it is possible to indirectly analyze whether thermal shock is the cause of the unexpected melting of the second fuse 104, facilitating fault diagnosis. More specifically, the distance between the second temperature sensor and the second fuse 104 ranges from 10mm to 30mm. The second temperature sensor is not shown in the figure.

[0158] In some embodiments, refer to Figure 2 and Figure 4As shown, the high-voltage box 100 also includes a Hall current sensor 118. The Hall current sensor 118 is used to detect the current in the circuit where the converter 400 is located. Specifically, the Hall sensor is configured, for example, to detect the current of the second common positive busbar 108d and is electrically connected to the battery cluster control unit 117a, thereby enabling the current parameter at the second common positive busbar 108d to be transmitted to the battery cluster control unit 117a in the form of an electrical signal.

[0159] Based on the configuration of the first shunt 113 and the second shunt 114, the Hall current sensor 118 is designed to be redundant. However, when one of the first shunt 113 and the second shunt 114 fails, the Hall sensor can indirectly obtain the current of the circuit where the first battery cluster 200 or the second battery cluster 300 is located by detecting the current in the circuit where the converter 400 is located, combined with the detection of the other of the first shunt 113 and the second shunt 114.

[0160] In one embodiment, reference is made to Figure 1 As shown, the high-voltage box 100 has an external end face 100a. Specifically, the external end face 100a can be an outer surface of the housing 105. The converter positive port 106, converter negative port 109, battery positive port group 107, and battery negative port group 110 are all located at the external end face 100a of the high-voltage box 100. This arrangement facilitates the centralized arrangement of wiring harnesses connected to the converter positive port 106, converter negative port 109, battery positive port group 107, and battery negative port group 110 from the external end face 100a of the high-voltage box 100.

[0161] For more specific solutions, refer to Figure 1 As shown, a communication interface 119 electrically connected to the battery management module 117 can be further provided on the external end face 100a. The communication interface 119 can be connected to external control devices such as computer hosts that can perform human-computer interaction, so that external devices can retrieve information from devices such as the battery cluster control unit 117a of the battery management module 117, and control the battery cluster control unit 117a to adjust the on / off state of components such as the first relay 101.

[0162] Reference Figure 1 As shown, a push-button switch 120 electrically connected to the main circuit breaker 112 can also be installed on the external terminal face 100a so that the user can manually disconnect the main circuit breaker 112 by operating the push-button switch 120 during maintenance.

[0163] In one embodiment, reference is made to Figure 1As shown, the converter positive port 106 and converter negative port 109 are both located on the first side A1 of the external end face 100a; the battery positive port group 107 and battery negative port group 110 are both located on the second side A2 of the external end face 100a opposite to the first side A1. This arrangement partitions the interfaces related to the converter 400 and the interfaces related to the battery clusters, making it easier for users to distinguish and wire them. When integrating the high-voltage box 100 into the energy storage device, this configuration also facilitates the partitioned wiring within the energy storage device, making the spatial distribution of wiring within the energy storage device more rational.

[0164] Reference Figure 1 As shown, a handle 122 can also be provided on the high-voltage box 100. The handle 122 can be fixedly installed on the housing 105. More specifically, the handle 122 can be installed at the external end face 100a, so that the user can grab the high-voltage box to assemble the high-voltage box 100 into the energy storage device.

[0165] Based on the use of the high-voltage box 100, a second aspect of this application also provides an energy storage device, including the aforementioned high-voltage box 100, which has the beneficial effects of the high-voltage box 100, which will not be described in detail here.

[0166] In the specific scheme, the energy storage device also includes the aforementioned first battery cluster 200, third battery cluster 300, and converter 400. The connection relationship between the high-voltage box 100, the first battery cluster 200, the third battery cluster 300, and the converter 400 is as described above and will not be repeated here.

[0167] It should be noted that although this application mainly uses the connection of the high-voltage box 100 to the first battery cluster 200 and the second battery cluster 300 as an example to illustrate the inventive concept, in actual application, it is understandable that more battery clusters can be connected to the high-voltage box 100, and the circuit connected to the first battery cluster 200 and the second battery cluster 300 can be integrated and set at the high-voltage box 100. This application will not elaborate further here.

[0168] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A high-pressure box, characterized in that, include: A first relay is adapted to control the on / off state of the negative terminal of a first battery cluster and a converter, the first relay having a first terminal for electrical connection to the negative terminal of the converter; A first fuse is adapted to connect the positive terminal of a first battery cluster and a converter, the first fuse having a second terminal for electrical connection to the positive terminal of the converter; A second relay is adapted to control the on / off state of the positive terminal of the second battery cluster and the inverter, the second relay having a third terminal for electrical connection to the positive terminal of the inverter; A second fuse, adapted to connect the negative terminal of the second battery cluster and the inverter, the second fuse having a fourth terminal for electrical connection to the negative terminal of the inverter; Wherein, the first terminal of the first relay is connected to the fourth terminal of the second fuse, and the third terminal of the second relay is connected to the second terminal of the first fuse.

2. The high-voltage box according to claim 1, characterized in that, The high-pressure box also includes: The positive terminal of the converter is adapted to allow the positive terminal of the converter to be electrically connected to the high-voltage box. A battery positive terminal group is adapted to electrically connect the positive terminals of the first battery cluster and the second battery cluster to the high-voltage box. A positive electrode busbar is connected between the positive terminal of the inverter and the positive terminal group of the battery; The first fuse is connected to the positive terminal of the inverter and the positive terminal of the battery via the positive terminal busbar, and the second relay is connected to the positive terminal of the inverter and the positive terminal of the battery via the positive terminal busbar.

3. The high-pressure box according to claim 2, characterized in that, The battery positive terminal group includes: The first positive terminal is adapted to be electrically connected to the positive terminal of the first battery cluster; The second positive terminal is adapted to be electrically connected to the positive terminal of the second battery cluster; The positive electrode conductive busbar includes: The first conductive busbar is connected between the first fuse and the first positive terminal. The second conductive bus is connected between the second relay and the second positive terminal; Wherein, the surface area of ​​the first conductive bus connected to the first fuse is greater than the surface area of ​​the second conductive bus connected to the second relay.

4. The high-pressure box according to claim 2, characterized in that, The positive electrode conductive busbar also includes: A first common positive electrode busbar is connected to the second terminal of the first fuse and the third terminal of the second relay; The second common positive electrode busbar is connected to the positive terminal of the converter; The high-pressure box also includes: The main circuit breaker is connected between the first common positive conductor and the second common positive conductor to control the on / off state of the first common positive conductor and the second common positive conductor.

5. The high-pressure box according to claim 4, characterized in that, The high-pressure box also includes: The converter negative terminal is adapted to allow the converter negative terminal to be electrically connected to the high-voltage box. The battery negative terminal group is adapted to allow the negative terminals of the first battery cluster and the second battery cluster to be electrically connected to the high-voltage box. A negative electrode busbar is connected between the negative terminal of the inverter and the negative terminal group of the battery; The second fuse is connected to the negative terminal of the inverter and the negative terminal of the battery via the negative terminal busbar, and the first relay is connected to the negative terminal of the inverter and the negative terminal of the battery via the negative terminal busbar.

6. The high-voltage box according to claim 5, characterized in that, The battery negative terminal group includes: The first negative terminal is adapted to be electrically connected to the negative terminal of the first battery cluster; The second negative terminal is suitable for electrical connection to the negative terminal of the second battery cluster; The negative electrode conductive busbar includes: The third conductive busbar is connected between the first relay and the first negative terminal. The fourth conductive busbar is connected between the second fuse and the second negative terminal. The surface area of ​​the fourth conductive busbar connected to the second fuse is greater than the surface area of ​​the third conductive busbar connected to the first relay.

7. The high-voltage box according to claim 6, characterized in that, The third conductive bus includes: The first connecting segment is connected to the first relay; The second connection segment is connected to the first negative terminal port; The high-pressure box also includes: A first splitter is connected between the first connecting segment and the second connecting segment; And / or, the fourth conductive bus includes: The third connecting section is connected to the second fuse; The fourth connection segment is connected to the second negative terminal port; The high-pressure box also includes: The second splitter is connected between the third and fourth connecting sections.

8. The high-voltage box according to claim 6, characterized in that, The negative electrode conductive busbar also includes: A first common negative electrode busbar is connected to the fourth terminal of the second fuse and the first terminal of the first relay; The second common negative electrode busbar is connected to the negative electrode port of the converter; The main circuit breaker is connected between the first common negative conductor and the second common negative conductor to control the on / off state of the first common negative conductor and the second common negative conductor.

9. The high-voltage box according to claim 5, characterized in that, At least a portion of the positive electrode busbar and at least a portion of the negative electrode busbar are arranged in layers inside the high-voltage box.

10. The high-voltage box according to claim 5, characterized in that, The high-voltage box has an external end face; The converter positive terminal, the converter negative terminal, the battery positive terminal group, and the battery negative terminal group are all located on the external end face of the high voltage box.

11. The high-voltage box according to claim 10, characterized in that, The positive terminal and the negative terminal of the converter are both located on the first side of the external terminal face; the positive terminal group and the negative terminal group of the battery are both located on the second side of the external terminal face opposite to the first side.

12. The high-voltage box according to any one of claims 1 to 11, characterized in that, The high-pressure box also includes: The first equalization branch is connected in parallel with the first relay, and the first equalization branch includes a first resistor and a third relay connected in series. And / or, the high-voltage box further includes: The second balancing branch is connected in parallel with the second relay. The second balancing branch includes a second resistor and a fourth relay connected in series.

13. The high-voltage box according to any one of claims 1 to 11, characterized in that, The high-pressure box also includes: The battery management module includes multiple battery cluster control units; At least some of the battery cluster control units are arranged in layers inside the high-voltage box; inside the high-voltage box, the area where the first relay, the first fuse, the second relay, and the second fuse are located is located on the periphery of the battery management module.

14. An energy storage device, characterized in that, Includes the high-voltage box as described in any one of claims 1 to 13.

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