A high-voltage tank circuit and a high-voltage tank

Abstract

The utility model discloses a kind of high-voltage box circuit and high-voltage box.The high-voltage box circuit includes: AC / DC module is used to access mains, DC / DC module is connected with battery pack, DC / DC module is also connected with the input end of first isolation module, the output end of first isolation module is connected with control module, AC / DC module is also connected with the output end of first isolation module, output control module is connected between battery pack and electrical equipment, control module is also connected with output control module;AC / DC module and DC / DC module are used to power supply for control module;First isolation module is used to prevent reverse current;Control module is used to control the conduction or turn-off of output control module;Output control module is used to control whether battery pack is for electrical equipment power supply;Wherein, the output voltage of AC / DC module is greater than the output voltage of DC / DC module.The high-voltage box circuit provided in the utility model embodiment is favorable to reduce high-voltage box cost.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a high-voltage box circuit and a high-voltage box. Background Technology

[0002] A high-voltage box is an electrical device used for storing, distributing, and managing high-voltage electrical energy. It is widely used in power systems, industrial fields, and new energy equipment (such as electric vehicles and energy storage systems). A high-voltage box typically contains a low-voltage power supply unit and an uninterruptible power supply (UPS). The low-voltage power supply unit converts mains power into low-voltage direct current to power the low-voltage circuits within the high-voltage box, including the control devices. The UPS supplies power to the low-voltage circuits when the mains power is interrupted.

[0003] However, uninterruptible power supply (UPS) devices are expensive, and the installation of UPS devices inside the high-voltage box also leads to a higher cost for the high-voltage box. Utility Model Content

[0004] This invention provides a high-voltage box circuit and a high-voltage box to reduce the cost of the high-voltage box.

[0005] According to one aspect of the present invention, a high-voltage box circuit is provided, the high-voltage box circuit comprising: an AC / DC module, a DC / DC module, a first isolation module, a control module, and an output control module;

[0006] The AC / DC module is used to connect to mains power. The DC / DC module is connected to the battery pack. The DC / DC module is also connected to the input terminal of the first isolation module. The output terminal of the first isolation module is connected to the control module. The AC / DC module is also connected to the output terminal of the first isolation module. The output control module is connected between the battery pack and the electrical equipment. The control module is also connected to the output control module.

[0007] The AC / DC module and the DC / DC module are used to power the control module; the first isolation module is used to prevent reverse current; the control module is used to control the on or off of the output control module; the output control module is used to control whether the battery pack powers the electrical equipment; wherein, the output voltage of the AC / DC module is greater than the output voltage of the DC / DC module.

[0008] Optionally, the high-voltage box circuit also includes: a second isolation module;

[0009] The input terminal of the second isolation module is connected to the AC / DC module, the output terminal of the second isolation module is connected to the output terminal of the first isolation module, and the output terminal of the first isolation module is connected to the DC / DC module.

[0010] Optionally, the high-voltage box circuit also includes: a first circuit breaker;

[0011] The DC / DC module is connected to the battery pack via the first circuit breaker, and the first circuit breaker is also connected to the control module.

[0012] Optionally, the output control module includes: a detection unit, a relay unit, and a switching unit;

[0013] The positive and negative input terminals of the relay unit are connected to the positive and negative terminals of the battery pack respectively through the detection unit. The positive and negative output terminals of the relay unit are connected to the positive and negative input terminals of the switch unit respectively. The positive and negative output terminals of the switch unit are connected to the electrical equipment. The control terminal of the relay unit and the detection unit are connected to the control module. The control module is also connected to the positive and negative terminals of the battery pack. The control module is also connected to the positive and negative output terminals of the relay unit.

[0014] The detection unit is used to detect the loop current; the control module is used to detect the output voltage of the battery pack and the device voltage of the electrical equipment, and control the relay unit to turn on or off according to the loop current, the output voltage or the device voltage; the relay unit and the switch unit are used to control whether the battery pack supplies power to the electrical equipment.

[0015] Optionally, the detection unit includes: a Hall sensor and a shunt;

[0016] The Hall sensor is disposed between the positive terminal of the battery pack and the relay unit, and the shunt is disposed between the negative terminal of the battery pack and the relay unit.

[0017] Optionally, the relay unit includes: a first relay and a second relay;

[0018] The input terminal of the first relay is connected to the positive terminal of the battery pack through the detection unit, and the output terminal of the first relay is connected to the positive input terminal of the switching unit. The input terminal of the second relay is connected to the negative terminal of the battery pack through the detection unit, and the output terminal of the second relay is connected to the negative input terminal of the switching unit. The control terminals of the first relay and the second relay are both connected to the control module. The positive and negative output terminals of the switching unit are connected to the electrical equipment.

[0019] Optionally, the output control module further includes: a pre-charge relay and a pre-charge resistor;

[0020] The input terminal of the precharge relay is connected to the input terminal of the first relay, the output terminal of the precharge relay is connected to the first terminal of the precharge resistor, the second terminal of the precharge resistor is connected to the output terminal of the first relay, and the control terminal of the precharge relay is connected to the control module.

[0021] Optionally, the switching unit includes a manual circuit breaker.

[0022] Optionally, the output control module further includes: a first fuse, a second fuse, a first temperature-sensitive resistor, and a second temperature-sensitive resistor;

[0023] The first end of the first fuse is connected to the positive terminal of the battery pack through the detection unit, and the second end of the first fuse is connected to the relay unit. The first end of the second fuse is connected to the negative terminal of the battery pack through the detection unit, and the second end of the second fuse is connected to the relay unit. The first temperature-sensitive resistor is located close to the first fuse, and the second temperature-sensitive resistor is located close to the second fuse. Both the first temperature-sensitive resistor and the second temperature-sensitive resistor are connected to the control module.

[0024] According to another aspect of the present invention, a high-voltage box is also provided, which includes: a housing and the high-voltage box circuit described in any of the above embodiments;

[0025] The high-voltage box circuit is located inside the housing, which includes a panel, a cover, and a shell. The panel is provided with a positive input interface, a negative input interface, a positive output interface, and a negative output interface. The high-voltage box circuit is connected to the battery pack through the positive input interface and the negative input interface, and the high-voltage box circuit is connected to the electrical equipment through the positive output interface and the negative output interface.

[0026] This utility model embodiment utilizes the different voltage outputs of the AC / DC module and the DC / DC module. When the mains power is normal, the AC / DC module supplies power to the control module, and when the mains power fails, it automatically switches to the DC / DC module to supply power to the control module. This eliminates the need for an uninterruptible power supply device, resulting in a simple circuit structure and reducing the cost of the high-voltage box.

[0027] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a high-voltage box circuit provided in an embodiment of this utility model;

[0030] Figure 2 This is a schematic diagram of another high-voltage box circuit provided in an embodiment of this utility model;

[0031] Figure 3 This is a schematic diagram of another high-voltage box circuit provided in this embodiment of the present utility model;

[0032] Figure 4 This is a schematic diagram of another high-voltage box circuit provided in this embodiment of the present utility model;

[0033] Figure 5 This is a schematic diagram of a high-pressure box provided in an embodiment of the present utility model;

[0034] Figure 6 This is a front view of a high-pressure box provided in an embodiment of this utility model;

[0035] Figure 7 This is a bottom view of a high-pressure box provided in an embodiment of this utility model. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] This utility model provides a high-voltage box circuit. This high-voltage box circuit uses different voltage outputs from an AC / DC module and a DC / DC module. When the mains power is normal, the AC / DC module powers the control module; when the mains power fails, it automatically switches to the DC / DC module to power the control module. The circuit structure is simple and helps reduce the cost of the high-voltage box. Figure 1 This is a schematic diagram of a high-voltage box circuit provided in an embodiment of this utility model. (Refer to...) Figure 1 The high-voltage box circuit includes: AC / DC module 110, DC / DC module 120, first isolation module 130, control module 140 and output control module 150.

[0039] AC / DC module 110 is used to connect to AC mains power. DC / DC module 120 is connected to battery pack 10 and also connected to the input terminal of first isolation module 130. The output terminal of first isolation module 130 is connected to control module 140, and AC / DC module 110 is also connected to the output terminal of first isolation module 130. Output control module 150 is connected between battery pack 10 and electrical device 20, and control module 140 is also connected to output control module 150. AC / DC module 110 and DC / DC module 120 are used to power control module 140. First isolation module 130 is used to prevent reverse current. Control module 140 is used to control the on / off state of output control module 150. Output control module 150 is used to control whether battery pack 10 supplies power to electrical device 20. The output voltage of AC / DC module 110 is greater than the output voltage of DC / DC module 120.

[0040] Specifically, both AC / DC module 110 and DC / DC module 120 are connected to control module 140, and both AC / DC module 110 and DC / DC module 120 are used to power control module 140. AC / DC module 110 converts AC mains power into a first voltage, and DC / DC module 120 converts the output voltage of battery pack 10 into a second voltage. The first voltage is the output voltage of AC / DC module 110, and the second voltage is the output voltage of DC / DC module 120, with the first voltage being greater than the second voltage. Control module 140 can operate within a certain voltage range, with both the first and second voltages falling within its operating voltage range. The operating voltage range of control module 140 can be, for example, 9V-32V. The output voltage of AC / DC module 110 can be, for example, 24V, and the output voltage of DC / DC module 120 can be, for example, 23V. It should be noted that the output voltage of DC / DC module 120 can be adjusted according to actual needs, so that the output voltage of DC / DC module 120 is less than the output voltage of AC / DC module 110 while remaining within the operating voltage range of control module 140. For example, the control module 140 can be a battery management system.

[0041] The output voltage of AC / DC module 110 is greater than the output voltage of DC / DC module 120. When the AC mains power is normal, control module 140 is powered by the AC / DC module. At this time, the voltage at the output terminal of the first isolation module 130 is greater than the voltage at its input terminal, so the first isolation module 130 is turned off, isolating AC / DC module 110 from DC / DC module 120. The branch containing DC / DC module 120 is effectively open-circuited, and DC / DC module 120 has no output. When the AC mains power is off, AC / DC module 110 has no output. At this time, the voltage at the output terminal of the first isolation module 130 is less than the voltage at its input terminal, so the first isolation module 130 is turned on, and DC / DC module 120 powers control module 140. For example, the first isolation module 130 can be a diode.

[0042] When the control module 140 is powered on, the control module 140 controls the on or off of the output control module 150, thereby controlling the power supply of the battery pack 10 to the electrical equipment 20.

[0043] This utility model embodiment utilizes the different voltage outputs of AC / DC module 110 and DC / DC module 120. When the AC mains power is normal, AC / DC module 110 supplies power to control module 140. When the AC mains power is interrupted, DC / DC module 120 automatically switches to supply power to control module 140. This eliminates the need for an uninterruptible power supply device, resulting in a simple circuit structure and reducing the cost of the high-voltage box.

[0044] Figure 2 This is a schematic diagram of another high-voltage box circuit provided by an embodiment of this utility model. Optionally, based on the above embodiments, refer to... Figure 2 The high-voltage box circuit also includes: a second isolation module 160.

[0045] The input terminal of the second isolation module 160 is connected to the AC / DC module 110, the output terminal of the second isolation module 160 is connected to the output terminal of the first isolation module 130, and the output terminal of the first isolation module 130 is connected to the DC / DC module 120.

[0046] When the AC mains power is interrupted, the AC / DC module 110 has no output. The voltage at the output terminal of the first isolation module 130 is lower than the voltage at its input terminal, so the first isolation module 130 is turned on. At this time, the voltage at the output terminal of the second isolation module 160 is higher than the voltage at its input terminal, so the second isolation module 160 is turned off to prevent the DC / DC module 120 from draining current into the AC / DC module 110, thereby avoiding damage to the AC / DC module 110.

[0047] For example, the second isolation module 160 can also be a diode. When the second isolation module 160 is a diode, the power supply voltage provided to the control module 140 is actually the output voltage of the AC / DC module 110 minus the forward voltage drop of the diode. Taking the output voltage of the AC / DC module 110 as 24 volts and the forward voltage drop of the diode as 0.7 volts, the power supply voltage provided to the control module 140 is actually 23.3 volts.

[0048] Figure 3 This is a schematic diagram of another high-voltage box circuit provided by an embodiment of this utility model. Optionally, based on the above embodiments, refer to... Figure 3 The high-voltage box circuit also includes: a first circuit breaker 170.

[0049] The DC / DC module 120 is connected to the battery pack 10 via a first circuit breaker 170, which is also connected to the control module 140. It should be noted that the first circuit breaker 170 controls the connection between the DC / DC module 120 and the battery pack 10. The control module 140 detects the output voltage of the battery pack 10. When the output voltage of the battery pack 10 exceeds the maximum input voltage of the DC / DC module 120, the control module 140 controls the first circuit breaker 170 to turn off, preventing damage to the first circuit breaker 170.

[0050] Figure 4 This is a schematic diagram of another high-voltage box circuit provided by an embodiment of this utility model. Optionally, based on the above embodiments, refer to... Figure 4The output control module 150 includes: a detection unit 151, a relay unit 152, and a switch unit 153.

[0051] The positive and negative input terminals of relay unit 152 are connected to the positive P+ and negative P1 terminals of battery pack 10 respectively via detection unit 151. The positive and negative output terminals of relay unit 152 are connected to the positive and negative input terminals of switch unit 153 respectively. The positive and negative output terminals of switch unit 153 are connected to electrical equipment 20. The control terminal of relay unit 152 and detection unit 151 are connected to control module 140. Control module 140 is also connected to the positive and negative terminals of battery pack 10, and the positive and negative output terminals of relay unit 152 are also connected to the positive and negative output terminals of relay unit 152. Detection unit 151 is used to detect the circuit current. Control module 140 is used to detect the output voltage of battery pack 10 and the equipment voltage of electrical equipment 20, and controls the relay unit 152 to turn on or off according to the circuit current, output voltage, or equipment voltage. Relay unit 152 and switch unit 153 are used to control whether battery pack 10 supplies power to electrical equipment 20.

[0052] It should be noted that the switch unit 153 and the relay unit 152 are both independent switches, meaning that the switch unit 153 and the relay unit 152 are not linked. The control module 140 detects the loop current, the output voltage of the battery pack 10, and the device voltage of the electrical equipment 20. When any of the loop current, the output voltage of the battery pack 10, or the electrical equipment 20 is abnormal, the control module 140 controls the relay unit 152 to turn off, thereby disconnecting the connection between the battery pack 10 and the electrical equipment 20 when the switch unit 153 is turned on.

[0053] Specifically, when the output voltage of the battery pack 10 is greater than a first preset voltage, the device voltage of the electrical device 20 is greater than a second preset voltage, or the circuit current is greater than a preset current, the control module 140 controls the relay unit 152 to turn off, thereby cutting off the connection between the battery pack 10 and the electrical device 20 to prevent abnormal output voltage of the battery pack 10 from damaging the electrical device 20, or abnormal device voltage of the electrical device 20 from damaging the battery pack 10. When the output voltage of the battery pack 10 is less than or equal to the first preset voltage, the device voltage of the electrical device 20 is less than or equal to the second preset voltage, and the circuit current is less than or equal to the preset current, the control module 140 controls the relay unit 152 to close. The first preset voltage is the maximum input voltage of the electrical device 20, the second preset voltage is the maximum input voltage of the battery pack 10, and the preset current is the maximum input current of the electrical device 20. In practical applications, the first preset voltage, the second preset voltage, and the preset current can be set according to actual needs; this embodiment does not impose any limitations on this.

[0054] Based on the above embodiments, optionally, refer to... Figure 4 The detection unit 151 includes: a Hall sensor CT and a shunt CS.

[0055] The Hall sensor CT is located between the positive terminal P+ of the battery pack 10 and the relay unit 150, and the shunt CS is located between the negative terminal P- of the battery pack 10 and the relay unit 152.

[0056] Specifically, the Hall sensor CT and the shunt converter CS complement each other. The Hall sensor CT detects the magnitude of the current by relying on the magnetic effect of the current, and compared to the shunt converter CS, it can quickly obtain the current magnitude in the circuit and respond quickly when the current changes. The shunt converter CS detects the magnitude of the current by generating a voltage across its terminals under the action of the current, and compared to the Hall sensor CT, it has higher accuracy and can accurately obtain the current magnitude in the circuit.

[0057] In addition, the dual configuration of the shunt CS and the Hall sensor CT allows the shunt CS and the Hall sensor CT to be redundant with each other, thereby enhancing the robustness of the high-voltage box circuit.

[0058] Based on the above embodiments, optionally, refer to... Figure 4 The relay unit 152 includes: a first relay K1 and a second relay K2.

[0059] The input terminal of the first relay K1 is connected to the positive terminal P+ of the battery pack 10 through the detection unit 151. The output terminal of the first relay K1 is connected to the positive input terminal of the switch unit 153. The input terminal of the second relay K2 is connected to the negative terminal P- of the battery pack 10 through the detection unit 151. The output terminal of the second relay K2 is connected to the negative input terminal of the switch unit 153. The control terminals of the first relay K1 and the second relay K2 are both connected to the control module 140. The positive and negative output terminals of the switch unit 153 are connected to the electrical equipment 20.

[0060] Specifically, both the first relay K1 and the second relay K2 are controlled by the control module 140. When the output voltage of the battery pack 10 is greater than a first preset voltage, the device voltage of the electrical device 20 is greater than a second preset voltage, or the circuit current is greater than a preset current, the control module 140 controls the first relay K1 and the second relay K2 to turn off. When the output voltage of the battery pack 10 is less than or equal to the first preset voltage, the device voltage of the electrical device 20 is less than or equal to the second preset voltage, and the circuit current is less than or equal to the preset current, the control module 140 controls the first relay K1 and the second relay K2 to close. The first relay K1 controls the connection between the positive terminal P+ of the battery pack 10 and the electrical device 20, and the second relay K2 controls the connection between the negative terminal P- of the battery pack 10 and the electrical device 20.

[0061] Based on the above embodiments, optionally, refer to... Figure 4 The output control module 150 also includes a pre-charge relay K3 and a pre-charge resistor R1.

[0062] The input terminal of the precharge relay K3 is connected to the input terminal of the first relay K1, the output terminal of the precharge relay K3 is connected to the first terminal of the precharge resistor R1, the second terminal of the precharge resistor R1 is connected to the output terminal of the first relay K1, and the control terminal of the precharge relay K1 is connected to the control module 140.

[0063] Specifically, after the electrical device 20 is connected, the control module 140 controls the pre-charge relay K3 and the second relay K2 to close. At this time, the battery pack 10 supplies power to the electrical device 20 through the pre-charge resistor R1. The pre-charge resistor R1 limits the current between the battery pack 10 and the electrical device 20 to avoid inrush current at the moment the electrical device 20 is powered on. When the device voltage of the electrical device 20 is the same as the output voltage of the battery pack 10, the control module 140 controls the first relay K1 to close and the pre-charge relay K3 to close. At this time, the battery pack 10 supplies power to the electrical device 20 through the first relay K1 and the second relay K2.

[0064] Based on the above embodiments, optionally, refer to... Figure 4 The output control module 150 also includes: a first fuse FU1, a second fuse FU2, a first temperature sensing resistor RT1, and a second temperature sensing resistor RT2.

[0065] The first terminal of the first fuse FU1 is connected to the positive terminal P+ of the battery pack 10 through the detection unit 151. The second terminal of the first fuse FU1 is connected to the relay unit 152. The first terminal of the second fuse FU2 is connected to the negative terminal P- of the battery pack 10 through the detection unit 151. The second terminal of the second fuse FU2 is connected to the relay unit 152. The first temperature sensing resistor RT1 is set close to the first fuse FU1, and the second temperature sensing resistor RT2 is set close to the second fuse FU2. Both the first temperature sensing resistor RT1 and the second temperature sensing resistor RT2 are connected to the control module 150.

[0066] Specifically, the maximum allowable current of the first fuse FU1 and the second fuse FU2 is the same. When the current in the circuit between the battery pack 10 and the electrical equipment 20 exceeds the maximum allowable current of the first fuse FU1 and the second fuse FU2, the first fuse FU1 and the second fuse FU2 will blow to prevent overcurrent in the circuit. The maximum allowable current of the first fuse FU1 and the second fuse FU2 can be set with reference to the maximum output current of the battery pack 10 and the maximum allowable current of the electrical equipment 20.

[0067] The first temperature-sensitive resistor RT1 detects the temperature of the first fuse FU1, and the second temperature-sensitive resistor RT2 detects the temperature of the second fuse FU2. The temperatures of both fuse FU1 and FU2 are related to the magnitude of the current flowing through them, and are positively correlated. That is, the greater the current flowing through fuse FU1 and FU2, the higher their temperatures. The resistance values ​​of both RT1 and RT2 are temperature-dependent; their resistance values ​​change with temperature. Therefore, the control module 140 can calculate the current flowing through fuse FU1 and FU2 based on the resistance values ​​of RT1 and RT2, respectively. In other words, the control module 140 can determine whether an overcurrent has occurred in the circuit before fuse FU1 and FU2 blow, and control the relay unit 152 to turn off when an overcurrent occurs, thus forming active protection. This embodiment employs active protection via a first fuse FU1, a second fuse FU2, a first temperature sensor RT1, and a second temperature sensor RT2, and passive protection via the first fuse FU1 and the second fuse FU2. This configuration combines active and passive protection, further enhancing the safety of the high-voltage box circuit.

[0068] This utility model embodiment also provides a high-pressure box. Figure 5 This is a schematic diagram of a high-pressure box provided in an embodiment of the present invention. Figure 6 This is a front view of a high-pressure box provided in an embodiment of this utility model. Figure 7 This is a bottom view of a high-voltage box provided in an embodiment of this utility model. Combined with... Figure 5 , Figure 6 and Figure 7 The high-voltage box includes: a housing 200 and a high-voltage box circuit 100 provided in any of the above embodiments.

[0069] The high-voltage box circuit 100 is housed inside the housing 200, which includes a panel 210, a cover 220, and a housing 230. The panel 210 is provided with a positive input interface 211, a negative input interface 212, a positive output interface 212, and a negative output interface 214. The high-voltage box circuit 100 is connected to the battery pack 10 through the positive input interface 211 and the negative input interface 212, and the high-voltage box circuit 100 is connected to the electrical equipment 20 through the positive output interface 213 and the negative output interface 214.

[0070] The high-voltage box provided in this embodiment has the beneficial effects of the high-voltage box circuit 100 provided in any of the above embodiments, which will not be described in detail here.

[0071] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0072] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-voltage box circuit, characterized in that, include: AC / DC module, DC / DC module, first isolation module, control module and output control module; The AC / DC module is used to connect to mains power. The DC / DC module is connected to the battery pack. The DC / DC module is also connected to the input terminal of the first isolation module. The output terminal of the first isolation module is connected to the control module. The AC / DC module is also connected to the output terminal of the first isolation module. The output control module is connected between the battery pack and the electrical equipment. The control module is also connected to the output control module. The AC / DC module and the DC / DC module are used to power the control module; the first isolation module is used to prevent reverse current; the control module is used to control the on or off of the output control module; the output control module is used to control whether the battery pack powers the electrical equipment; wherein, the output voltage of the AC / DC module is greater than the output voltage of the DC / DC module.

2. The high-voltage box circuit according to claim 1, characterized in that, Also includes: Second isolation module; The input terminal of the second isolation module is connected to the AC / DC module, the output terminal of the second isolation module is connected to the output terminal of the first isolation module, and the output terminal of the first isolation module is connected to the DC / DC module.

3. The high-voltage box circuit according to any one of claims 1-2, characterized in that, Also includes: First circuit breaker; The DC / DC module is connected to the battery pack via the first circuit breaker, and the first circuit breaker is also connected to the control module.

4. The high-voltage box circuit according to claim 1, characterized in that, The output control module includes: a detection unit, a relay unit, and a switching unit; The positive and negative input terminals of the relay unit are connected to the positive and negative terminals of the battery pack respectively through the detection unit. The positive and negative output terminals of the relay unit are connected to the positive and negative input terminals of the switch unit respectively. The positive and negative output terminals of the switch unit are connected to the electrical equipment. The control terminal of the relay unit and the detection unit are connected to the control module. The control module is also connected to the positive and negative terminals of the battery pack. The control module is also connected to the positive and negative output terminals of the relay unit. The detection unit is used to detect the loop current; the control module is used to detect the output voltage of the battery pack and the device voltage of the electrical equipment, and control the relay unit to turn on or off according to the loop current, the output voltage or the device voltage; the relay unit and the switch unit are used to control whether the battery pack supplies power to the electrical equipment.

5. The high-voltage box circuit according to claim 4, characterized in that, The detection unit includes: a Hall sensor and a shunt; The Hall sensor is disposed between the positive terminal of the battery pack and the relay unit, and the shunt is disposed between the negative terminal of the battery pack and the relay unit.

6. The high-voltage box circuit according to claim 4, characterized in that, The relay unit includes: a first relay and a second relay; The input terminal of the first relay is connected to the positive terminal of the battery pack through the detection unit, and the output terminal of the first relay is connected to the positive input terminal of the switching unit. The input terminal of the second relay is connected to the negative terminal of the battery pack through the detection unit, and the output terminal of the second relay is connected to the negative input terminal of the switching unit. The control terminals of the first relay and the second relay are both connected to the control module. The positive and negative output terminals of the switching unit are connected to the electrical equipment.

7. The high-voltage box circuit according to claim 6, characterized in that, The output control module also includes: a pre-charge relay and a pre-charge resistor; The input terminal of the precharge relay is connected to the input terminal of the first relay, the output terminal of the precharge relay is connected to the first terminal of the precharge resistor, the second terminal of the precharge resistor is connected to the output terminal of the first relay, and the control terminal of the precharge relay is connected to the control module.

8. The high-voltage box circuit according to claim 4, characterized in that, The switching unit includes a manual circuit breaker.

9. The high-voltage box circuit according to any one of claims 4-8, characterized in that, The output control module further includes: a first fuse, a second fuse, a first temperature-sensitive resistor, and a second temperature-sensitive resistor; The first end of the first fuse is connected to the positive terminal of the battery pack through the detection unit, and the second end of the first fuse is connected to the relay unit. The first end of the second fuse is connected to the negative terminal of the battery pack through the detection unit, and the second end of the second fuse is connected to the relay unit. The first temperature-sensitive resistor is located close to the first fuse, and the second temperature-sensitive resistor is located close to the second fuse. Both the first temperature-sensitive resistor and the second temperature-sensitive resistor are connected to the control module.

10. A high-pressure box, characterized in that, include: The housing and the high-voltage box circuit as described in any one of claims 1-9; The high-voltage box circuit is located inside the housing, which includes a panel, a cover, and a shell. The panel is provided with a positive input interface, a negative input interface, a positive output interface, and a negative output interface. The high-voltage box circuit is connected to the battery pack through the positive input interface and the negative input interface, and the high-voltage box circuit is connected to the electrical equipment through the positive output interface and the negative output interface.

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