Switch control equipment, battery management system, battery equipment and power consumption devices

Abstract

A switch control device comprises: a switch unit arranged on a main circuit; further comprising: a controller and a reset unit electrically connected to the controller; a drive unit, wherein an input end of the drive unit is electrically connected to the controller and the reset unit, and an output end of the drive unit is electrically connected to the switch unit; the controller is configured to control the switch unit to be turned on or off; the switch control device is configured such that: in response to a failure in the power supply voltage of the controller and / or a failure in the controller, the reset unit sends a reset signal to the controller and the drive unit, and the drive unit drives the switch unit to be turned off in response to the reset signal.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of safety protection technology, and in particular to a switch control device, a battery management system, a battery device and an electrical device. Background Art

[0002] In a battery system where battery devices power loads, when key parameters such as voltage, current and temperature data are abnormal, the battery management system needs to disconnect the main circuit, which is the charging and discharging loop between the battery device and external devices, to reduce the risk of damage to the battery device due to faults such as overcharging, over-discharging and overheating. Summary of the invention

[0003] The embodiments of the present application provide a switch control device, a battery management system, a battery device and an electrical device, which can realize a redundant protection function to improve safety.

[0004] In a first aspect, an embodiment of the present application provides a switch control device, comprising: a controller, a reset unit electrically connected to the controller, and a switch unit arranged on a main circuit; a drive unit, wherein an input end of the drive unit is electrically connected to the controller and the reset unit, and an output end of the drive unit is electrically connected to the switch unit; the controller is configured to control the switch unit to be turned on or off; the switch control device is configured such that: in response to a failure in the power supply voltage of the controller and / or a failure in the controller, the reset unit sends a reset signal to the controller and the drive unit, and the drive unit drives the switch unit to be turned off in response to the reset signal.

[0005] When the battery device equipped with the switch control device has a fault such as overcharge, over discharge and over temperature, on the one hand, the controller can control the switch unit to turn off and the main circuit is disconnected; on the other hand, when the power supply voltage of the controller fails and / or the controller fails, the reset unit sends a reset signal to the controller and the drive unit, and the drive unit responds to the reset signal to drive the switch unit to turn off and the main circuit is disconnected. Therefore, redundant protection of the battery device can be achieved when the battery device has a fault such as overcharge, over discharge and over temperature, and the risk of damage to the battery device is low, and the safety is high.

[0006] In one or more embodiments, the reset unit includes a programmable delay monitoring chip, the reset signal includes a first reset signal, and the switch control device is configured to: in response to a failure of the power supply voltage of the controller, the programmable delay monitoring chip sends the first reset signal to the controller and the drive unit; and / or, the reset unit includes a watchdog, the reset signal includes a second reset signal, and the switch control device is configured to: in response to a failure of the controller, the watchdog sends a second reset signal to the controller and the drive unit.

[0007] In one or more embodiments, the driving unit includes a logic AND gate and a D flip-flop, and the controller is configured to output a clear signal and / or a trigger signal; the logic AND gate is configured to control the D flip-flop to drive the switch unit to turn off in response to the clear signal and / or the reset signal; the D flip-flop is configured to drive the switch unit to turn off in response to the trigger signal.

[0008] In one or more embodiments, the logic AND gate is powered by a supply voltage of the controller and / or a supply voltage of the reset unit.

[0009] In one or more embodiments, the D flip-flop is powered by a supply voltage of the controller and / or a supply voltage of the reset unit.

[0010] In one or more embodiments, the switch control device also includes a power supply monitoring unit; the power supply monitoring unit is electrically connected to the controller, and the power supply monitoring unit is configured to output a first monitoring signal based on the power supply voltage of the controller, and to output a second monitoring signal based on the power supply voltage of the reset unit; the controller is configured to determine that the power supply voltage of the controller has failed based on the first monitoring signal, or to determine that the power supply voltage of the reset unit has failed based on the second monitoring signal, and to control the switch unit to shut down.

[0011] In one or more embodiments, the switch control device also includes a first input power supply, a second input power supply, a first power supply unit and a second power supply unit; the first power supply unit is electrically connected to the first input power supply, and the first power supply unit is configured to convert the voltage of the first input power supply into a power supply voltage of the controller; the second power supply unit is electrically connected to the second input power supply, and the second power supply unit is configured to convert the voltage of the second input power supply into a power supply voltage of the reset unit.

[0012] In one or more embodiments, the controller is configured to output a third reset signal when the power supply voltage of the controller is less than the first voltage threshold; the driving unit is configured to drive the switch unit to turn off in response to the third reset signal.

[0013] In a second aspect, an embodiment of the present application provides a battery management system, including a switch control device as in the first aspect.

[0014] In a third aspect, an embodiment of the present application provides a battery device, including a battery module and a battery management system as in the second aspect.

[0015] In a fourth aspect, an embodiment of the present application provides an electrical device, including a load and the battery device in the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by the figures in the corresponding drawings, and these exemplary descriptions are not intended to limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements.

[0017] Figure 1 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 3 ;

[0020] Figure 4 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 4 ;

[0021] Figure 5 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 5 ;

[0022] Figure 6 is a schematic diagram of the circuit structure of a driving unit provided in an embodiment of the present application;

[0023] Figure 7 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 6 ;

[0024] Figure 8 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 7 ;

[0025] Fig. 9 is a schematic diagram of the circuit structure of a power supply monitoring unit provided in an embodiment of the present application;

[0026] Fig.10 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 8 ;

[0027] Fig.11 This is a schematic diagram of the composition of the switch control device provided in the embodiment of the present application. Figure 9 ;

[0028] Fig.12 It is a schematic diagram of the composition of the electrical device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that, when an element is described as being “connected to” another element, it may be directly connected to the other element, or one or more intervening elements may exist therebetween.

[0031] In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as there is no structural conflict between them.

[0032] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the switch device provided in the embodiment of the present application. Figure 1 As shown, the switch control device 100 includes a switch unit 10 , a controller 20 , a reset unit 30 and a drive unit 40 .

[0033] The switch unit 10 is arranged on the main circuit. It is understandable that the main circuit of the present application is a power circuit for transmitting electrical energy. For example, the main circuit is a charge and discharge circuit between a battery device and an external device. In some embodiments, the switch unit 10 is one or a group of electrical components for controlling the on and off of the main circuit. Specifically, the switch unit 10 connects (the switch unit 10 is turned on) or disconnects (the switch unit 10 is turned off) the main circuit as needed, thereby establishing or disconnecting the electrical connection between the battery device and the external device. In some embodiments, the switch unit 10 includes a controllable switch such as a circuit breaker, a contactor or a relay, and the external device includes a load and a charging device.

[0034] In some embodiments of the present application, the controller 20 is electrically connected to the input ends of the reset unit 30 and the drive unit 40, respectively, and the output end of the drive unit 40 is electrically connected to the switch unit 10. When a fault or anomaly occurs, the controller 20 receives the reset signal RST output by the reset unit 30 to reset. On the other hand, in a normal working state, the controller 20 outputs a control signal to the drive unit 40 to control the switch unit 10 to turn on or off. As an example, the controller 20 includes a microcontroller unit (MCU) or a digital signal processing (DSP) controller.

[0035] The switch control device 100 is configured such that: in response to a failure of the power supply voltage V1 of the controller 20 and / or a failure of the controller 20, the reset unit 30 sends a reset signal RST to the controller 20 and the drive unit 40, and the drive unit 40 drives the switch unit 10 to turn off in response to the reset signal RST.

[0036] The failure of the power supply voltage V1 of the controller 20 can be understood as: the power supply to the controller 20 fails to output a stable power supply voltage to the controller 20 as expected. For example, the power supply voltage V1 is less than the lower limit of the working voltage range specified by the controller 20 or the power supply voltage V1 is unstable.

[0037] The failure of the controller 20 can be understood as: the controller 20 cannot perform its intended function as expected. For example, the controller 20 cannot work normally due to program errors, external interference, improper system clock configuration, etc., and outputs a control signal to control the switch unit 10 to turn on or off.

[0038] Specifically, when the battery device equipped with the switch control device 100 has a fault such as overcharge, over discharge, and over temperature, on the one hand, the controller 20 is in a normal working state, the control switch unit 10 is turned off, and the main circuit is disconnected; on the other hand, when the power supply voltage V1 of the controller 20 fails and / or the controller 20 fails, the reset unit 30 sends a reset signal RST to the controller 20 and the drive unit 40, and the drive unit 40 responds to the reset signal RST and drives the switch unit 10 to turn off, and the main circuit is disconnected. In the above manner, when the battery device has a fault such as overcharge, over discharge, and over temperature, the power-off protection of the battery device is achieved, and the risk of damage to the battery device is reduced.

[0039] In some embodiments, Figure 2 As shown, the reset unit 30 includes a programmable delay monitoring chip 31 and / or a watchdog 32, and the reset signal RST includes a first reset signal RST_1 and / or a second reset signal RST_2. The switch control device 100 is configured as follows: in response to a failure of the power supply voltage V1 of the controller 20, the programmable delay monitoring chip 31 sends the first reset signal RST_1 to the controller 20 and the drive unit 40, and / or, in response to a failure of the controller 20, the watchdog 32 sends the second reset signal RST_2 to the controller 20 and the drive unit 40.

[0040] In a specific embodiment, the reset unit 30 includes a programmable delay monitoring chip 31 and a watchdog 32 , and the reset signal RST includes a first reset signal RST_1 and a second reset signal RST_2 .

[0041] Specifically, the programmable delay monitoring chip (Programmable Delay Timer Monitor IC) 31 is an integrated circuit designed for power management, system startup sequence control, and fault detection and recovery. The programmable delay monitoring chip 31 monitors the power supply voltage V1 in real time, and sends a first reset signal RST_1 to the controller 20 and the drive unit 40 when the power supply voltage V1 fails, so that the controller 20 is reset and the drive unit 40 drives the switch unit 10 to turn off, and the main circuit is disconnected, which is conducive to reducing the risk of damage to the battery device due to overcharging, over-discharging, over-temperature and other faults. Secondly, the programmable delay monitoring chip 31 provides a precise time delay, so that the first reset signal RST_1 is sent only when the power supply voltage V1 fails for a preset period of time, reducing the risk of the power supply voltage being detected incorrectly.

[0042] The watchdog 32 is a watchdog timer (Watchdog Timer, WDT), which is used to detect and recover the system unresponsive state caused by software failure (such as dead loop, infinite waiting, etc.). Specifically, the controller 20 will periodically send a signal WDI to the watchdog 32, which is called "feeding the dog" or "kicking the dog". This operation resets the timer of the watchdog 32, indicating that the controller 20 has not failed. If the timer of the watchdog 32 does not receive the "feeding the dog" signal within the set time, it is determined that the controller 20 has failed. The watchdog 32 sends a second reset signal RST_2 to the controller 20 and the drive unit 40 to reset the controller 20 and enable the drive unit 40 to drive the switch unit 10 to turn off, and the main circuit is disconnected, which is conducive to reducing the risk of damage to the battery device due to failures such as overcharging, over-discharging and over-temperature. In some embodiments, the controller 20 also sends an enable signal EN to the watchdog 32 to enable the watchdog 32 to work.

[0043] In some embodiments, Figure 3 As shown, the programmable delay monitoring chip 31 and the watchdog 32 are both powered by the power supply voltage V2. The power supply voltage V2 of the programmable delay monitoring chip 31 and the watchdog 32 is different from the power supply voltage V1 of the controller 20, so that when the power supply voltage V1 of the controller 20 fails, the programmable delay monitoring chip 31 and the watchdog 32 maintain normal operation, so as to send the first reset signal RST_1 and / or the second reset signal RST_2 to drive the switch unit 10 to turn off, which is conducive to improving safety and reliability.

[0044] In some embodiments, Figure 4 As shown, the driving unit 40 includes a logic AND gate 41 and a D flip-flop 42 .

[0045] The controller 20 is configured to output a clear signal CLR and / or a trigger signal SD. The logic AND gate 41 is configured to control the D flip-flop 42 to drive the switch unit 10 to turn off in response to the clear signal CLR and / or the reset signal RST. The D flip-flop 42 is configured to drive the switch unit 10 to turn off in response to the trigger signal SD. It can be understood that when at least one of the following conditions is met, the D flip-flop 42 drives the switch unit 10 to turn off: condition i, the controller 20 sends a clear signal CLR to the logic AND gate 41; condition ii, the controller 20 sends a trigger signal SD to the D flip-flop 42; condition iii, the programmable delay monitoring chip 31 sends a first reset signal RST_1 to the logic AND gate 41; condition iiii, the watchdog 32 sends a second reset signal RST_2 to the logic AND gate 41.

[0046] Specifically, when the power supply voltage V1 of the controller 20 does not fail and the controller 20 is in a normal working state, the controller 20 outputs a clear signal CLR and / or a trigger signal SD to drive the switch unit 10 to turn off, thereby disconnecting the main circuit, reducing the risk of damage to the battery device due to faults such as overcharging, overdischarging, and overtemperature. When the power supply voltage V1 of the controller 20 fails, the programmable delay monitoring chip 31 sends a first reset signal RST_1 to the logic AND gate 41 to drive the switch unit 10 to turn off, thereby disconnecting the main circuit, reducing the risk of damage to the battery device due to faults such as overcharging, overdischarging, and overtemperature. When the controller 20 fails, the watchdog 32 sends a second reset signal RST_2 to the logic AND gate 41 to drive the switch unit 10 to turn off, thereby disconnecting the main circuit, reducing the risk of damage to the battery device due to faults such as overcharging, overdischarging, and overtemperature.

[0047] In some embodiments, Figure 5 As shown, the logic AND gate 41 is powered by the power supply voltage V1 of the controller 20 and / or the power supply voltage V2 of the reset unit 30. In a specific embodiment, the logic AND gate 41 is powered by the power supply voltage V1 of the controller 20 and the power supply voltage V2 of the reset unit 30 at the same time, and one of the power supply voltage V1 of the controller 20 and the power supply voltage V2 of the reset unit 30 does not fail, and the logic AND gate 41 works normally. This embodiment realizes redundant power supply of the logic AND gate 41, which is conducive to improving the reliability and stability of the operation of the logic AND gate 41.

[0048] In some embodiments, the D flip-flop 42 is powered by the power supply voltage V1 of the controller 20 and / or the power supply voltage V2 of the reset unit 30. In a specific embodiment, taking the case where the D flip-flop 42 is powered by both the power supply voltage V1 of the controller 20 and the power supply voltage V2 of the reset unit 30, if one of the power supply voltage V1 of the controller 20 and the power supply voltage V2 of the reset unit 30 does not fail, the D flip-flop 42 works normally. This embodiment implements redundant power supply of the D flip-flop 42, which is beneficial to improving the reliability and stability of the operation of the D flip-flop 42.

[0049] Please refer to Figure 6 , Figure 6 FIG. 4 is an exemplary diagram showing a circuit structure of the driving unit 40. Figure 6 As shown, the driving unit 40 also includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R7, a seventh resistor R8, a ninth resistor R9, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first Schottky diode D1, a second Schottky diode D2, a third Schottky diode D3 and a fourth Schottky diode D4.

[0050] The anode of the first Schottky diode D1 is input with the supply voltage V1 of the controller 20 , the anode of the second Schottky diode D2 is input with the supply voltage V2 of the reset unit 30 , and the cathodes of the first Schottky diode D1 and the second Schottky diode D2 are electrically connected to the power supply terminal VCC of the logic AND gate 41 . The third capacitor C3 is arranged between the cathode of the first Schottky diode D1 and the ground GND, the fourth resistor R4 is arranged between the cathode of the first Schottky diode D1 and the third input terminal C of the logic AND gate 41, the third resistor R3 is arranged between the cathode of the first Schottky diode D1 and the first input terminal A of the logic AND gate 41, the clear signal CLR is electrically connected to the first input terminal A of the logic AND gate 41 through the first resistor R1, the first capacitor C1 is arranged between the first input terminal A of the logic AND gate 41 and the ground GND, the first reset signal RST_1 / the second reset signal RST_2 is electrically connected to the second input terminal B of the logic AND gate 41 through the second resistor R2, the second capacitor C2 is arranged between the second input terminal B of the logic AND gate 41 and the ground GND, and the fifth resistor R5 is arranged between the output terminal Y of the logic AND gate 41 and the clear terminal of the D flip-flop The fourth capacitor C4 is set between the reset terminal of the D trigger Between GND and ground.

[0051] The anode of the third Schottky diode D3 is input with the power supply voltage V1 of the controller 20, the anode of the fourth Schottky diode D4 is input with the power supply voltage V2 of the reset unit 30, and the cathode of the third Schottky diode D3 and the cathode of the fourth Schottky diode D4 are electrically connected to the power supply terminal VCC of the D flip-flop 42. The output terminal Q of the D flip-flop 42 is electrically connected to the switch unit 10, the eighth capacitor C8 is arranged between the power supply terminal VCC of the D flip-flop 42 and the ground GND, the seventh capacitor C7 is arranged between the output terminal Q of the D flip-flop 42 and the ground GND, the trigger signal SD is input to the trigger terminal D of the D flip-flop 42 through the seventh resistor R7, the sixth capacitor C6 is arranged between the trigger terminal D of the D flip-flop 42 and the ground GND, the fifth capacitor C5 is arranged between the clock terminal CLK of the D flip-flop 42 and the ground GND, the clock signal CLK is input to the clock terminal CLK of the D flip-flop 42 through the sixth resistor R6, the ninth resistor R9 is arranged between one end of the seventh resistor R7 and the ground GND, and the eighth resistor R8 is arranged between one end of the sixth resistor R6 and the ground GND.

[0052] Specifically, when the logic AND gate 41 receives at least one of the clear signal CLR, the first reset signal RST_1, and the second reset signal RST_2, the output terminal Y of the logic AND gate 41 outputs a low level signal to the clear terminal of the D flip-flop 42. The output terminal Q of the D flip-flop 42 outputs a low-level signal to the switch unit 10, thereby controlling the switch unit 10 to turn off. When the logic AND gate 41 does not receive the clear signal CLR, the first reset signal RST_1, and the second reset signal RST_2, the output terminal Y of the logic AND gate 41 keeps outputting a high level. When the trigger terminal D of the D flip-flop 42 inputs the trigger signal SD, the output terminal Q of the D flip-flop 42 outputs a low-level signal to the switch unit 10, thereby controlling the switch unit 10 to turn off. In this embodiment, it is taken as an example that the clear signal CLR, the first reset signal RST_1, the second reset signal RST_2, and the trigger signal SD are all low-level signals.

[0053] In some embodiments, Figure 7As shown, the controller 20 is configured to output a third reset signal RST_3 when the power supply voltage V1 of the controller 20 is less than the first voltage threshold. The driving unit 40 is configured to drive the switch unit 10 to turn off in response to the third reset signal. In some embodiments, the first voltage threshold is the minimum value within the operating voltage range specified by the controller 20. When the power supply voltage V1 of the controller 20 is less than the first voltage threshold, the power supply voltage V1 of the controller 30 is in an undervoltage state, and the controller 20 further outputs the third reset signal RST_3 to the logic AND gate 41, so that the logic AND gate 41 controls the D flip-flop 42 to drive the switch unit 10 to turn off. It can be seen from the above embodiment that when the power supply voltage V1 of the controller 20 fails, the programmable delay monitoring chip 31 outputs the first reset signal RST_1 to the logic AND gate 41, so that the logic AND gate 41 controls the D flip-flop 42 to drive the switch unit 10 to turn off. The power supply voltage V1 of the controller 20 fails, including that the power supply voltage of the controller 20 is less than the first voltage threshold. The programmable delay monitoring chip 31 also implements the undervoltage reset function. That is, the programmable delay monitoring chip 31 and the controller 20 both implement the undervoltage reset function of the power supply voltage V1 of the controller 20, and realize the redundancy of the undervoltage reset function, which is beneficial to more reliably drive the switch unit 10 to shut down when the power supply voltage V1 of the controller 20 is in an undervoltage state, causing the controller 20 to fail to work normally.

[0054] In some embodiments, Figure 8 As shown, the switch control device 100 further includes a power monitoring unit 50 .

[0055] The power monitoring unit 50 is electrically connected to the controller 20, and is configured to output a first monitoring signal based on the power supply voltage V1 of the controller 20, and to output a second monitoring signal based on the power supply voltage V2 of the reset unit 30. The controller 20 is configured to determine that the power supply voltage V1 of the controller 20 fails based on the first monitoring signal, or to determine that the power supply voltage V2 of the reset unit 30 fails based on the second monitoring signal, and the controller 20 sends at least one of the clear signal CLR, the trigger signal SD, and the third reset signal RST_3 to control the switch unit 10 to turn off.

[0056] Please refer to Fig. 9 , Fig. 9 A circuit structure of the power monitoring unit 50 provided in the embodiment of the present application. Fig. 9 As shown, the power monitoring unit 50 includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a ninth capacitor C9 and a tenth capacitor C10.

[0057] The tenth resistor R10 and the eleventh resistor R11 are connected in series between the power supply voltage V1 of the controller 20 and the ground GND, the twelfth resistor R12 and the ninth capacitor C9 are connected in series between the first node N1 and the ground GND, the second node N2 is electrically connected to the controller 20, the first node N1 is the connection point between the tenth resistor R10 and the eleventh resistor R11, and the second node N2 is the connection point between the twelfth resistor R12 and the ninth capacitor C9. The power supply voltage V1 of the controller 20 is divided by the tenth resistor R10 and the eleventh resistor R11, and filtered by the RC filter composed of the twelfth resistor R12 and the ninth capacitor C9. The voltage of the second node N2 is the first monitoring signal, and the first monitoring signal is input to the controller 20. Then, the controller 20 monitors the power supply voltage V1 of the controller 20 based on the first monitoring signal, thereby determining whether the power supply voltage V1 of the controller 20 fails.

[0058] The thirteenth resistor R13 and the fourteenth resistor R14 are connected in series between the power supply voltage V2 of the reset unit 30 and the ground GND, the fifteenth resistor R15 and the tenth capacitor C10 are connected in series between the third node N3 and the ground GND, the fourth node N4 is electrically connected to the controller 20, the third node N3 is the connection point between the thirteenth resistor R13 and the fourteenth resistor R14, and the fourth node N4 is the connection point between the fifteenth resistor R15 and the tenth capacitor C10. The power supply voltage V2 of the reset unit 30 is divided by the thirteenth resistor R13 and the fourteenth resistor R14, and filtered by the RC filter composed of the fifteenth resistor R15 and the tenth capacitor C10. The voltage of the fourth node N4 is the second monitoring signal, and the second monitoring signal is input to the controller 20. Then, the controller 20 monitors the power supply voltage V2 of the reset unit 30 based on the second monitoring signal, thereby determining whether the power supply voltage V2 of the reset unit 30 fails.

[0059] In some embodiments, Fig.10 As shown, the switch control device 100 further includes a first input power source VI N1 , a second input power source VI N2 , a first power source unit 60 and a second power source unit 70 .

[0060] The first power supply unit 60 is electrically connected to the first input power supply VI N1, and the first power supply unit 60 is configured to convert the voltage of the first input power supply VI N into the power supply voltage V1 of the controller 20. The second power supply unit 70 is electrically connected to the second input power supply VIN2, and the second power supply unit 70 is configured to convert the voltage of the second input power supply VI N2 into the power supply voltage V2 of the reset unit 30. By converting the power supply voltage V1 of the controller 20 and the power supply voltage V2 of the reset unit 30 from different input power supplies, the controller 20 and the reset unit 30 are independently powered, reducing mutual interference between the two, and enhancing the reliability of power supply, which is conducive to making the controller 20 and the reset unit 30 more reliably realize their functions.

[0061] In some embodiments, Fig.11 As shown, the first power supply unit 60 includes a DC-DC circuit 61, an electronic fuse 62 and a first low voltage drop linear regulator 63 which are electrically connected in sequence.

[0062] Specifically, the DC-DC circuit 61 is configured to convert the voltage of the first input power source VIN1 into another DC voltage. For example, in some embodiments, the voltage of the first input power source VIN1 is 12V and the other DC voltage is 5V, then the DC-DC circuit 61 converts 12V into 5V. The electronic fuse 62 is configured to output the voltage output by the DC-DC circuit 61 to the first low-voltage difference linear regulator 63 when the voltage output by the DC-DC circuit 61 is not faulty, and is configured to stop outputting the voltage when the voltage output by the DC-DC circuit 61 fails, so as to reduce the risk of cascading failure of subsequent circuits due to the abnormal voltage output by the DC-DC circuit 61. The first low-voltage difference linear regulator 63 is configured to convert the voltage output by the DC-DC circuit 61 into the power supply voltage V1 of the controller 20 when receiving the voltage output by the DC-DC circuit 61.

[0063] In some embodiments, the second power supply unit 70 includes a second low voltage dropout linear regulator 71. The second low voltage dropout linear regulator 71 is configured to convert the voltage of the second input power source VI N2 into the supply voltage V2 of the reset unit 30.

[0064] In the related art, the power supply of the controller 20 is usually directly designed to be redundant. For example, two sets of power supply units are designed to convert the voltage of the first input power supply VI N1 into the power supply voltage V1 of the controller 20, so that when one of the power supply units has an abnormality such as component damage and causes the provided power supply voltage V1 to fail, the controller 20 can be powered by another power supply unit to maintain the normal operation of the controller 20. However, the power consumption and cost of this method are relatively high. In the embodiment of the present application, since the power consumption of the programmable delay monitoring chip 31 and the watchdog 32 during operation is less than the power consumption of the controller 20, although two sets of power supply units (including the first power supply unit 60 and the second power supply unit 70) are also used, the power consumption and cost of the present application are lower than those of the related art.

[0065] Please refer to Fig.12 , Fig.12 This is a schematic diagram of the composition of the electrical device 1 provided in the embodiment of the present application. Fig.12 As shown, the electrical device 1 includes a battery device 10000 and a load 20000 .

[0066] In some embodiments of the present application, the electrical device includes an energy storage system, which includes a battery device 10000 and a load 20000. The battery device includes the battery management system 1000 and one or more battery modules 2000 in the above embodiment, and the load 20000 includes an energy storage inverter.

[0067] In other embodiments of the present application, the electrical equipment includes products powered by the battery device 10000, such as drones, power tools, electric vehicles, etc.

[0068] In some embodiments, the battery module 2000 is used to store and provide electrical energy, and the battery management system 1000 is used to monitor, manage and / or protect the battery module 2000. The battery module 2000 includes at least one battery cell. When the battery module 2000 includes more than two battery cells, each battery cell is connected in series, in parallel, or in a mixed connection of series and parallel. The battery cell includes a single battery cell, or a battery cell module composed of multiple battery cells, and the battery cells in the battery cell module are connected in series, in parallel, or in a mixed connection.

[0069] In some embodiments, the switch control device 100 of the present application is disposed on a battery management system 1000. The switch unit 10 in the switch control device 100 is disposed between the battery module 2000 and the load 20000 to close or open the main circuit.

[0070] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A switch control device, comprising: A switch unit provided on the main circuit; characterized in that it also includes: A controller and a reset unit electrically connected to the controller; A driving unit, wherein an input end of the driving unit is electrically connected to the controller and the reset unit, and an output end of the driving unit is electrically connected to the switch unit; The controller is configured to control the switch unit to be turned on or off; The switch control device is configured to: In response to a failure in the power supply voltage of the controller and / or a failure in the controller, the reset unit sends a reset signal to the controller and the drive unit, and the drive unit drives the switch unit to turn off in response to the reset signal.

2. The switch control device according to claim 1, characterized in that: The reset unit includes a programmable delay monitoring chip, and the reset signal includes a first reset signal; The switch control device is configured such that: in response to a failure in the power supply voltage of the controller, the programmable delay monitoring chip sends the first reset signal to the controller and the drive unit; and / or, The reset unit includes a watchdog, and the reset signal includes a second reset signal; The switch control device is configured such that, in response to a failure of the controller, the watchdog sends the second reset signal to the controller and the driving unit.

3. The switch control device according to claim 1, characterized in that: The driving unit includes a logic AND gate and a D flip-flop, and the controller is configured to output a reset signal and / or a trigger signal; The logic AND gate is configured to control the D flip-flop to drive the switch unit to turn off in response to the clear signal and / or the reset signal; The D flip-flop is configured to drive the switch unit to turn off in response to the trigger signal.

4. The switch control device according to claim 3, characterized in that: The logic AND gate is powered by a power supply voltage of the controller and / or a power supply voltage of the reset unit.

5. The switch control device according to claim 3, characterized in that: The D flip-flop is powered by a power supply voltage of the controller and / or a power supply voltage of the reset unit.

6. The switch control device according to claim 1, characterized in that: The switch control device also includes a power supply monitoring unit; The power monitoring unit is electrically connected to the controller, and the power monitoring unit is configured to output a first monitoring signal based on the power supply voltage of the controller, and output a second monitoring signal based on the power supply voltage of the reset unit; The controller is configured to determine that a power supply voltage of the controller fails based on the first monitoring signal, or to determine that a power supply voltage of the reset unit fails based on the second monitoring signal, and control the switch unit to turn off.

7. The switch control device according to claim 1, characterized in that: The switch control device further includes a first input power supply, a second input power supply, a first power supply unit and a second power supply unit; The first power supply unit is electrically connected to the first input power supply, and the first power supply unit is configured to convert the voltage of the first input power supply into a supply voltage of the controller; The second power supply unit is electrically connected to the second input power supply, and the second power supply unit is configured to convert a voltage of the second input power supply into a supply voltage of the reset unit.

8. The switch control device according to any one of claims 1 to 7, characterized in that: The controller is configured to output a third reset signal when a power supply voltage of the controller is less than a first voltage threshold; The driving unit is configured to drive the switch unit to turn off in response to the third reset signal.

9. A battery management system, characterized in that: Comprising a switch control device as described in any one of claims 1-8.

10. A battery device, characterized in that: It comprises a battery module and a battery management system as claimed in claim 9.

11. An electrical device, characterized in that: The invention comprises a load and the battery device as claimed in claim 10.

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