Electric explosion-proof valve control circuit, electric explosion-proof valve and vehicle

Abstract

The utility model discloses an electric explosion-proof valve control circuit, an electric explosion-proof valve and a vehicle, relates to the technical field of explosion-proof valve control, is applied to the electric explosion-proof valve, and comprises an explosion-proof valve motor, an output end of which is connected with a valve position of the electric explosion-proof valve; the first end of the first bridge arm circuit is connected with the control power supply, and the midpoint is connected with the first input end of the explosion-proof valve motor; the first end of the second bridge arm circuit is connected with the control power supply, the midpoint is connected with the second input end of the explosion-proof valve motor, and the second end is grounded after being connected with the second end of the first bridge arm circuit; the control chip is connected with the third end of the first bridge arm circuit and the third end of the second bridge arm circuit, and is used for controlling the first bridge arm circuit and the second bridge arm circuit, so that a control power supply is input from the first input end of the explosion-proof valve motor and drives the valve position to open, or the control power supply is input from the second input end of the explosion-proof valve motor and drives the valve position to open. And the valve is driven to be closed. The control intelligence of the anti-explosion valve is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosion-proof valve control, in particular to an electric explosion-proof valve control circuit, an electric explosion-proof valve and a vehicle. BACKGROUND

[0002] With the continuous popularity of electric vehicles, users also have higher requirements for the safety of battery packs on electric vehicles (mainly how to achieve battery pack explosion-proof control).

[0003] The traditional explosion-proof control method uses a passive explosion-proof valve (i.e., the valve is opened by the impact of gas in the battery pack) for explosion-proof control. Due to the driving defects of the passive explosion-proof valve itself (i.e., the working principle of the passive explosion-proof valve), this explosion-proof control method cannot actively control the opening and closing of the valve, i.e., this explosion-proof control method cannot actively control the opening and closing of the valve, which results in low intelligence of the explosion-proof valve control.

[0004] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. UTILITY MODEL CONTENT

[0005] The main purpose of the present application is to provide an electric explosion-proof valve control circuit, an electric explosion-proof valve and a vehicle, which aims to solve the technical problem of low intelligence of explosion-proof valve control.

[0006] To achieve the above purpose, the present application provides an electric explosion-proof valve control circuit, which is applied to an electric explosion-proof valve, and the electric explosion-proof valve control circuit comprises:

[0007] An explosion-proof valve motor, the output end of the explosion-proof valve motor is connected with the valve position of the electric explosion-proof valve;

[0008] A first bridge arm circuit, the first end of the first bridge arm circuit is connected with a control power supply, and the midpoint of the first bridge arm circuit is connected with the first input end of the explosion-proof valve motor;

[0009] A second bridge arm circuit, the first end of the second bridge arm circuit is connected with the first end of the first bridge arm circuit, the midpoint of the second bridge arm circuit is connected with the second input end of the explosion-proof valve motor, and the second end of the second bridge arm circuit is connected with the second end of the first bridge arm circuit and then grounded;

[0010] a control chip connected with the third end of the first bridge arm circuit and the third end of the second bridge arm circuit, the control chip being configured to control the first bridge arm circuit to be in a first conduction state and the second bridge arm circuit to be in a second conduction state, so that the control power is input from the first input end of the explosion-proof valve motor and the valve position is opened based on the explosion-proof valve motor rotating in a forward direction, or control the first bridge arm circuit to be in a second conduction state and the second bridge arm circuit to be in a first conduction state, so that the control power is input from the second input end of the explosion-proof valve motor and the valve position is closed based on the explosion-proof valve motor rotating in a reverse direction, wherein the first conduction state is a state in which an upper half bridge is in a conduction state and a lower half bridge is in a non-conduction state, and the second conduction state is a state in which the upper half bridge is in a non-conduction state and the lower half bridge is in a conduction state.

[0011] In an embodiment, the control chip comprises a first control end and a second control end, and the first bridge arm circuit comprises:

[0012] a first switch connected with the control power source at a first end, connected with the first control end at a control end, and connected with the first input end at a second end;

[0013] a second switch connected with the second end of the first switch at a first end, connected with the second control end at a control end, and grounded at a second end.

[0014] In an embodiment, the second bridge arm circuit comprises:

[0015] a third switch connected with the control power source at a first end, connected with the second control end at a control end, and connected with the second input end at a second end;

[0016] a fourth switch connected with the second end of the third switch at a first end, connected with the first control end at a control end, and grounded at a second end.

[0017] In an embodiment, the first switch, the second switch, the third switch and the fourth switch comprise one of a metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor and a triode.

[0018] In an embodiment, the control chip comprises a driving control end, and the electric explosion-proof valve control circuit comprises:

[0019] A fifth switch tube, a first end of the fifth switch tube is connected with the control power supply, a control end of the fifth switch tube is connected with the driving control end, and a second end of the fifth switch tube is connected with the first end of the first bridge arm circuit and the first end of the second bridge arm circuit.

[0020] In an embodiment, the control chip comprises a current collection end, and the electric explosion-proof valve control circuit comprises:

[0021] A current sensor, a first end of the current sensor is connected with the control power supply, a second end of the current sensor is connected with the first end of the first bridge arm circuit and the first end of the second bridge arm circuit, and a collection end of the current sensor is connected with the current collection end.

[0022] In an embodiment, the electric explosion-proof valve control circuit comprises:

[0023] A key switch, a first end of the key switch is connected with the control power supply.

[0024] A line selector, a control end of the line selector is connected with a second end of the key switch, a selection input end of the line selector is connected with the control power supply, a first selection output end of the line selector is connected with the first end of the current sensor, and a second selection output end of the line selector is connected with the second end of the current sensor.

[0025] In an embodiment, the first end of the current sensor is connected with the first end of the fifth switch tube, the second end of the current sensor is connected with the second end of the fifth switch tube, or the first end of the fifth switch tube is connected with the control power supply through the current sensor, the second end of the current sensor is connected with the first end of the first bridge arm circuit and the first end of the second bridge arm circuit through the fifth switch tube, or the first end of the current sensor is connected with the control power supply through the fifth switch tube, and the second end of the fifth switch tube is connected with the first end of the first bridge arm circuit and the first end of the second bridge arm circuit through the current sensor.

[0026] In addition, to achieve the above-mentioned purpose, the application further provides an electric explosion-proof valve, which comprises the electric explosion-proof valve control circuit.

[0027] In addition, to achieve the above-mentioned purpose, the application further provides a vehicle, which comprises the electric explosion-proof valve and the battery pack, and the electric explosion-proof valve is arranged on the battery pack.

[0028] The embodiment of the application provides an electric explosion-proof valve control circuit, which is applied to an electric explosion-proof valve and comprises an explosion-proof valve motor, the output end of the explosion-proof valve motor is connected with the valve position of the electric explosion-proof valve, a first bridge arm circuit, the first end of the first bridge arm circuit is connected with a control power supply, the midpoint of the first bridge arm circuit is connected with the first input end of the explosion-proof valve motor, a second bridge arm circuit, the first end of the second bridge arm circuit is connected with the first end of the first bridge arm circuit, the midpoint of the second bridge arm circuit is connected with the second input end of the explosion-proof valve motor, and the second end of the second bridge arm circuit is connected with the second end of the first bridge arm circuit and then grounded, and a control chip, the control chip is connected with the third end of the first bridge arm circuit and the third end of the second bridge arm circuit, the control chip is used for controlling the first bridge arm circuit to be in a first conduction state and controlling the second bridge arm circuit to be in a second conduction state, so that the control power supply is input from the first input end of the explosion-proof valve motor and the valve position is opened based on the forward rotation of the explosion-proof valve motor, or the control chip is used for controlling the first bridge arm circuit to be in the second conduction state and controlling the second bridge arm circuit to be in the first conduction state, so that the control power supply is input from the second input end of the explosion-proof valve motor and the valve position is closed based on the reverse rotation of the explosion-proof valve motor, wherein the first conduction state is a state that the upper half bridge is in conduction and the lower half bridge is in cut-off, the second conduction state is a state that the upper half bridge is in cut-off and the lower half bridge is in conduction, the control chip is used for controlling the first bridge arm circuit to be in the first conduction state and controlling the second bridge arm circuit to be in the second conduction state, so that the control power supply is input from the first input end and output from the second input end, thereby controlling the explosion-proof valve motor to rotate forward and driving the valve position to open (namely, the electric explosion-proof valve is opened), or the control chip is used for controlling the first bridge arm circuit to be in the second conduction state and controlling the second bridge arm circuit to be in the first conduction state, so that the control power supply is input from the second input end and output from the first input end, thereby controlling the explosion-proof valve motor to rotate reversely and driving the valve position to close (namely, the electric explosion-proof valve is closed), so that the phenomenon that the valve cannot be actively opened and closed when the passive explosion-proof valve is used can be avoided. The electric explosion-proof valve control circuit controls the explosion-proof valve motor to rotate forward and reversely through the control chip, so that the electric explosion-proof valve is opened and closed, and the intelligence of explosion-proof valve control is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a frame schematic diagram of the first embodiment of the electric explosion-proof valve control circuit of the application.

[0030] Figure 2 It is a use scene schematic diagram of the existing passive explosion-proof valve.

[0031] Figure 3 It is a circuit schematic diagram of the first embodiment of the electric explosion-proof valve control circuit of the application.

[0032] Figure 4 It is a working schematic diagram of the first embodiment of the electric explosion-proof valve control circuit of the application.

[0033] Figure 5 Figure 2 is a working schematic diagram of a second embodiment of the electric explosion-proof valve control circuit of the present application;

[0034] Figure 6 Figure 3 is a working schematic diagram of a third embodiment of the electric explosion-proof valve control circuit of the present application;

[0035] Figure 7 Figure 4 is a circuit schematic diagram of the second embodiment of the electric explosion-proof valve control circuit of the present application;

[0036] Figure 8 Figure 5 is a circuit schematic diagram of the third embodiment of the electric explosion-proof valve control circuit of the present application.

[0037] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0038] Explanation of reference numerals:

[0039] 200 (VCC), control power supply; 310, valve position; 10 (M), explosion-proof valve motor; 20, first bridge arm circuit; 30, second bridge arm circuit; 40, control chip; 400, passive explosion-proof valve; 500, battery pack; Q1, first switch tube; Q2, second switch tube; Q3, third switch tube; Q4, fourth switch tube; EN1, first control end; EN2, second control end; Q5, fifth switch tube; RI, current sensor; HSD, drive control end; HALL, current collection end. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application.

[0041] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings and specific embodiments of the specification.

[0042] The battery pack explosion-proof valve solutions on the market at present all adopt passive explosion-proof valve solutions, which can be referred to as Figure 2 , Figure 2 Figure 1 is a use scenario schematic diagram of the existing passive explosion-proof valve, that is, passive explosion-proof valves 400 are installed at four positions of a battery pack 500 to achieve exhaust of the battery pack 500 (i.e., explosion-proof control, which will be described as exhaust hereinafter), but the passive explosion-proof valve has the problems of being unable to actively control the opening and closing of the valve due to its own opening characteristics (i.e., mechanically opened by the internal gas pressure of the battery pack), long response time of opening, and uncertain opening position of the valve, especially when the battery cell is in thermal runaway, a large amount of high-temperature and toxic gas is released, and the gas cannot be discharged in time, which may cause a major personnel safety accident, and thus the intelligence of the explosion-proof valve control is not high.

[0043] Therefore, based on the above deficiencies of the explosion-proof valve control, the electric explosion-proof valve control circuit of the present application is proposed. The main solution of the embodiment of the present application is: by controlling the control chip to control the first bridge arm circuit to be in the first conduction state, and control the second bridge arm circuit to be in the second conduction state, at this time, the control power is input from the first input end and output from the second input end, to control the explosion-proof valve motor to rotate forward and drive the valve position to open (i.e. the electric explosion-proof valve is opened), or the first bridge arm circuit can be controlled to be in the second conduction state, and the second bridge arm circuit is controlled to be in the first conduction state, at this time, the control power is input from the second input end and output from the first input end, to control the explosion-proof valve motor to rotate reversely and drive the valve position to close (i.e. the electric explosion-proof valve is closed), thereby avoiding the phenomenon that the valve cannot be actively opened and closed when using the passive explosion-proof valve. The electric explosion-proof valve control circuit controls the explosion-proof valve motor to rotate forward and reversely by the control chip to realize the opening and closing of the electric explosion-proof valve, thereby improving the intelligence of the explosion-proof valve control.

[0044] Based on this, the embodiment of the present application provides an electric explosion-proof valve control circuit, referring to Figure 1 , Figure 1 The figure is a schematic diagram of the first embodiment of the electric explosion-proof valve control circuit of the present application.

[0045] Referring to Figure 1 , the present application provides an electric explosion-proof valve control circuit applied to an electric explosion-proof valve 300 (marked in the figure), the electric explosion-proof valve control circuit comprising:

[0046] An explosion-proof valve motor 10 (which can be a commonly used DC motor), the output end of the explosion-proof valve motor 10 is connected with the valve position 310 of the electric explosion-proof valve 300;

[0047] A first bridge arm circuit 20, the first end of the first bridge arm circuit 20 is connected with the control power supply 200, and the midpoint of the first bridge arm circuit 20 is connected with the first input end of the explosion-proof valve motor 10;

[0048] A second bridge arm circuit 30, the first end of the second bridge arm circuit 30 is connected with the first end of the first bridge arm circuit 20, the midpoint of the second bridge arm circuit 30 is connected with the second input end of the explosion-proof valve motor 10, and the second end of the second bridge arm circuit 30 is connected with the second end of the first bridge arm circuit 20 and then grounded;

[0049] The control chip 40 is connected with the third end of the first bridge arm circuit 20 and the third end of the second bridge arm circuit 30, and is used for controlling the first bridge arm circuit 20 to be in a first conduction state and the second bridge arm circuit 30 to be in a second conduction state, so as to realize that the power supply 200 is input from the first input end of the explosion-proof valve motor 10 and drives the valve position 310 to be opened based on the forward rotation of the explosion-proof valve motor 10, or the first bridge arm circuit 20 is controlled to be in a second conduction state and the second bridge arm circuit 30 is controlled to be in a first conduction state, so as to realize that the power supply 200 is input from the second input end of the explosion-proof valve motor 10 and drives the valve position 310 to be closed based on the reverse rotation of the explosion-proof valve motor 10, wherein the first conduction state is a state that the upper half bridge is in conduction and the lower half bridge is in cut-off, and the second conduction state is a state that the upper half bridge is in cut-off and the lower half bridge is in conduction.

[0050] In the embodiment, the whole electric explosion-proof valve control circuit is applied to the electric explosion-proof valve 300, by connecting the explosion-proof valve motor 10 in the electric explosion-proof valve control circuit with the valve position 310 of the electric explosion-proof valve 300, and then by controlling the explosion-proof valve motor 10 to rotate forward and reverse, the opening and closing of the electric explosion-proof valve 300 are realized. It is worth noting that, for the valve position 310, it can be the opening valve position of the electric explosion-proof valve 300, or it can be the position of the electric explosion-proof valve 300 to push the opening valve and the closing valve, that is, the valve position 310 can be any one position of the electric explosion-proof valve 300 that directly or indirectly controls the opening and closing of the valve, which is not limited here. At this time, the first bridge arm circuit 20 and the second bridge arm circuit 30 are used to control the explosion-proof valve motor 10 to rotate forward and reverse, that is, the control chip 40 is used to control the first bridge arm circuit 20 to be in the first conduction state, and the second bridge arm circuit 30 is controlled to be in the second conduction state, thereby forming a power supply loop of the control power supply 200-the upper bridge arm of the first bridge arm circuit 20-the first input terminal-the second input terminal-the lower bridge arm of the second bridge arm circuit 30, and then the explosion-proof valve motor 10 rotates forward (assuming that the loop is a forward power supply circuit at this time), thereby driving the valve position 310 to open, that is, the explosion-proof valve motor 10 rotating forward can realize the opening of the electric explosion-proof valve 300, that is, the explosion-proof valve motor 10 rotating forward opens the valve of the electric explosion-proof valve 300; the control chip 40 is used to control the first bridge arm circuit 20 to be in the second conduction state, and the second bridge arm circuit 30 is controlled to be in the first conduction state, thereby forming a power supply loop of the control power supply 200-the upper bridge arm of the second bridge arm circuit 30-the second input terminal-the first input terminal-the lower bridge arm of the first bridge arm circuit 20, and then the explosion-proof valve motor 10 rotates reversely (assuming that the loop is a reverse power supply circuit at this time), thereby driving the valve position 310 to close, that is, the explosion-proof valve motor 10 rotating reversely can realize the closing of the electric explosion-proof valve 300, that is, the explosion-proof valve motor 10 rotating reversely closes the valve of the electric explosion-proof valve 300. It is worth noting that the first bridge arm circuit 20 and the second bridge arm circuit 30 can form an H-bridge circuit for controlling the explosion-proof valve motor 10, and by controlling the conduction of the switch tubes in the first bridge arm circuit 20 and the second bridge arm circuit 30, different conduction states of the first bridge arm circuit 20 and the second bridge arm circuit 30 can be realized, so as to finally realize the forward and reverse control of the explosion-proof valve motor 10. Finally, the explosion-proof valve motor 10 can be controlled to rotate forward and reverse based on the whole electric explosion-proof valve control circuit, so as to realize the opening or closing of the electric explosion-proof valve intelligently, so as to improve the intelligence of the explosion-proof valve control.

[0051] In the embodiment, the electric explosion-proof valve control circuit is applied to the electric explosion-proof valve 300, including an explosion-proof valve motor 10, an output end of the explosion-proof valve motor 10 being connected with a valve position 310 of the electric explosion-proof valve 300; a first bridge arm circuit 20, a first end of the first bridge arm circuit 20 being connected with a control power supply 200, a midpoint of the first bridge arm circuit 20 being connected with a first input end of the explosion-proof valve motor 10; a second bridge arm circuit 30, a first end of the second bridge arm circuit 30 being connected with the first end of the first bridge arm circuit 20, a midpoint of the second bridge arm circuit 30 being connected with a second input end of the explosion-proof valve motor 10, a second end of the second bridge arm circuit 30 being connected with a second end of the first bridge arm circuit 20 and then grounded; a control chip 40, the control chip 40 being connected with a third end of the first bridge arm circuit 20 and a third end of the second bridge arm circuit 30, the control chip 40 being used for controlling the first bridge arm circuit 20 to be in a first conduction state and controlling the second bridge arm circuit 30 to be in a second conduction state, so as to realize that the control power supply 200 is input from the first input end of the explosion-proof valve motor 10 and based on the explosion-proof valve motor 10 being driven to rotate in a forward direction to open the valve position 310, or the control chip 40 being used for controlling the first bridge arm circuit 20 to be in a second conduction state and controlling the second bridge arm circuit 30 to be in a first conduction state, so as to realize that the control power supply 200 is input from the second input end of the explosion-proof valve motor 10 and based on the explosion-proof valve motor 10 being driven to rotate in a reverse direction to close the valve position 310, wherein the first conduction state is a state that an upper half bridge is conducted and a lower half bridge is closed, the second conduction state is a state that the upper half bridge is closed and the lower half bridge is conducted, the first bridge arm circuit 20 is controlled to be in the first conduction state and the second bridge arm circuit 30 is controlled to be in the second conduction state by the control chip 40, so that the control power supply 200 is input from the first input end and output from the second input end at this time, so as to control the explosion-proof valve motor 10 to rotate in the forward direction and then drive the valve position 310 to open (that is, the electric explosion-proof valve 300 is opened), or the first bridge arm circuit 20 can be controlled to be in the second conduction state and the second bridge arm circuit 30 can be controlled to be in the first conduction state, so that the control power supply 200 is input from the second input end and output from the first input end at this time, so as to control the explosion-proof valve motor 10 to rotate in the reverse direction and then drive the valve position 310 to close (that is, the electric explosion-proof valve 300 is closed), thereby avoiding the phenomenon that the valve cannot be actively controlled to open and close when a passive explosion-proof valve is used. The electric explosion-proof valve control circuit controls the explosion-proof valve motor 10 to rotate in the forward direction and the reverse direction by the control chip 40 to realize that the electric explosion-proof valve 300 is opened and closed, thereby improving the intelligence of explosion-proof valve control.

[0052] Further, based on the first embodiment of the present application, the second embodiment of the electric explosion-proof valve control circuit of the present application is proposed, referring to Figure 3 , Figure 3 The first embodiment of the electric explosion-proof valve control circuit of the present application is a circuit schematic diagram, the control chip 40 includes a first control end EN1 and a second control end EN2, the first bridge arm circuit 20 includes:

[0053] The first switch Q1 has a first end (as a first end of the first bridge arm circuit 20) connected to the control power supply 200, a control end (as a third end of the first bridge arm circuit 20) connected to the first control end EN1, and a second end (as a midpoint of the first bridge arm circuit 20) connected to the first input end.

[0054] The second switch Q2 has a first end connected to the second end of the first switch Q1, a control end (as a third end of the first bridge arm circuit 20) connected to the second control end EN2, and a second end (as a second end of the first bridge arm circuit 20) connected to the ground.

[0055] In an embodiment, the second bridge arm circuit 30 includes:

[0056] The third switch Q3 has a first end (as a first end of the second bridge arm circuit 30) connected to the control power supply 200, a control end (as a third end of the second bridge arm circuit 30) connected to the second control end EN2, and a second end (as a midpoint of the second bridge arm circuit 30) connected to the second input end.

[0057] The fourth switch Q4 has a first end connected to the second end of the third switch Q3, a control end (as a third end of the second bridge arm circuit 30) connected to the first control end EN1, and a second end (as a second end of the second bridge arm circuit 30) connected to the ground.

[0058] In an embodiment, the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 include one of a metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor, and a triode.

[0059] In the embodiment, the first bridge arm circuit 20 and the second bridge arm circuit 30 are both upper and lower bridge arms composed of two switching tubes, and the control ends of the switching tubes of the upper and lower bridge arms are respectively connected to the first control end EN1 and the second control end EN2. However, the control ends of the two switching tubes are staggered to be connected to the first control end EN1 and the second control end EN2, that is, the upper bridge arm of the first bridge arm circuit 20 and the lower bridge arm of the second bridge arm circuit 30 are connected to the first control end EN1, and the lower bridge arm of the first bridge arm circuit 20 and the upper bridge arm of the second bridge arm circuit 30 are connected to the second control end EN2, so as to realize the forward and reverse rotation control of the explosion-proof valve motor 10 based on the first bridge arm circuit 20 and the second bridge arm circuit 30. In addition, the switching tube only serves to connect and disconnect the circuit, so the first switching tube Q1, the second switching tube Q2, the third switching tube Q3 and the fourth switching tube Q4 can be one of a metal oxide semiconductor field effect tube, an insulated gate bipolar transistor and a triode, and can also be a simple manual button switch, which is not limited herein. In the embodiment, the switching tube used in all embodiments of the present application can be a TFT (Thin Film Transistor), a field effect tube or other devices with the same characteristics. Since the second end and the drain of the switching tube used herein are symmetrical, the source and the drain can be interchangeable. In the embodiment, in order to distinguish the two poles of the switching tube except the gate, one pole is called the source and the other pole is called the drain. In addition, the switching tube used in the embodiment can include P-type switching tubes and / or N-type switching tubes, wherein the P-type switching tube is turned on when the gate is at a low level and is turned off when the gate is at a high level, and the N-type switching tube is turned on when the gate is at a high level and is turned off when the gate is at a low level. The corresponding N-type and P-type switching tubes have different gate driving voltage conduction modes and different control modes. The actual switching tube is controlled, which is not limited herein. For example, as shown in Figure 3 Table 1, the first control end EN1 and the second control end EN2 only have two states of 0 and 1, which are issued by the BMS (Battery Management System) software according to the thermal runaway strategy (or can be directly input by the user). In order to avoid the situation that all the switching tubes are turned on to cause the power supply to be short-circuited when EN1 / EN2 are both 1, a gate circuit is used to perform the control logic in Table 1.

[0060] EN1 EN2 Motor state 1 0 Forward rotation 0 1 Reverse rotation 1 1 Stop 0 0 Stop

[0061] Table 1

[0062] Further, refer to Figure 4 , Figure 4For the working schematic diagram of the first embodiment of the electric explosion-proof valve control circuit of the present application, when it is detected that the conditions such as air pressure, voltage, temperature, etc. are abnormal to judge that the battery pack is in a thermal runaway state (internal detection program, which is not detailed here), the BMU (Battery Management Unit) sends a forward rotation signal, the signal value of the first control end EN1 is 1 and the signal value of the second control end EN2 is 0, then the first switch tube Q1 and the fourth switch tube Q4 are turned on, the second switch tube Q2 and the third switch tube Q3 are turned off, the driving current of the control power supply 200 flows through the first switch tube Q1-the first input end of the explosion-proof valve motor 10-the second input end of the explosion-proof valve motor 10-the fourth switch tube Q4 back to GND, at this time the explosion-proof valve motor 10 rotates forward, the electric explosion-proof valve 300 opens the valve, releases the thermal runaway gas in the battery pack 500, to complete the intelligent valve opening process. Further, refer to Figure 5 , Figure 5 For the working schematic diagram of the second embodiment of the electric explosion-proof valve control circuit of the present application, when it is detected that the conditions such as air pressure, voltage, temperature, etc. are restored, the BMU immediately outputs a reverse rotation signal, at this time the signal value of the first control end EN1 is 0 and the signal value of the second control end EN2 is 1, the second switch tube Q2 and the third switch tube Q3 are turned on, the first switch tube Q1 and the fourth switch tube Q4 are turned off, the driving current of the control power supply 200 flows through the third switch tube Q3-the second input end of the explosion-proof valve motor 10-the first input end of the explosion-proof valve motor 10-the second switch tube Q2 back to GND, at this time the explosion-proof valve motor 10 reverses, releases the thermal runaway gas in the battery pack 500, to complete the intelligent valve closing process. Further, refer to Figure 6 , Figure 6 For the working schematic diagram of the third embodiment of the electric explosion-proof valve control circuit of the present application, when it is detected that the conditions such as air pressure, voltage, temperature, etc. are abnormal to judge that the battery pack is not in a thermal runaway state, on the one hand, the signal value of the first control end EN1 can be directly controlled to be 1 and the signal value of the second control end EN2 can be directly controlled to be 1, to realize the conduction of the entire H-bridge circuit, at this time the driving current of the control power supply 200 will not flow through the explosion-proof valve motor 10, the explosion-proof valve motor 10 stops working, on the other hand, the signal value of the first control end EN1 can be directly controlled to be 0 and the signal value of the second control end EN2 can be directly controlled to be 0, to realize the non-conduction of the entire H-bridge circuit, at this time the driving current of the control power supply 200 will not flow through the explosion-proof valve motor 10, the explosion-proof valve motor 10 stops working, to realize the opening or closing of the electric explosion-proof valve 300 by controlling the opening and closing of the switch tubes in the H-bridge circuit to realize the forward and reverse rotation of the explosion-proof valve motor 10, thereby improving the control intelligence of the electric explosion-proof valve 300.

[0063] In an embodiment, based on the first embodiment and / or the second embodiment of the present application described above, the third embodiment of the electric explosion-proof valve control circuit of the present application is proposed, refer to Figure 7 , Figure 7The second embodiment of the electric explosion-proof valve control circuit is shown in the circuit schematic diagram. The control chip 40 comprises a driving control end HSD, and the electric explosion-proof valve control circuit comprises:

[0064] The fifth switch tube Q5 has a first end connected with the control power supply 200, a control end connected with the driving control end HSD, and a second end connected with the first end of the first bridge arm circuit 20 and the first end of the second bridge arm circuit 30.

[0065] In the embodiment, the whole electric explosion-proof valve control circuit can further comprise the fifth switch tube Q5 (which can also be of the same type as the first to fourth switch tubes described above) connected between the two bridge arm circuits and the control power supply 200. When the battery pack is in a non-thermal runaway state, the fifth switch tube Q5 is in an open state, and the whole H-bridge driving circuit is in a dormant state. It is worth noting that the fifth switch tube Q5 can be directly controlled by the high and low voltages of the driving control end HSD, or can be directly controlled by a button switch, which is not limited herein. Of course, the fifth switch tube Q5 can also be connected at other positions, such as between the two bridge arm circuits and the ground, or on both sides of the explosion-proof valve motor 10, as long as the explosion-proof valve motor 10 is controlled not to be connected to the control power supply 200.

[0066] Based on the first embodiment, the second embodiment and / or the third embodiment of the present application described above, the fourth embodiment of the electric explosion-proof valve control circuit is proposed. The control chip 40 comprises a current collection end HALL, and the electric explosion-proof valve control circuit comprises:

[0067] The current sensor RI has a first end connected with the control power supply 200, a second end connected with the first end of the first bridge arm circuit 20 and the first end of the second bridge arm circuit 30, and a collection end connected with the current collection end HALL.

[0068] In an embodiment, referring to Figure 8 , Figure 8 The third embodiment of the electric explosion-proof valve control circuit is shown in the circuit schematic diagram. The electric explosion-proof valve control circuit comprises:

[0069] The button switch has a first end connected with the control power supply 200.

[0070] The line selector has a control end connected with the second end of the button switch, a selection input end connected with the control power supply 200, a first selection output end connected with the first end of the current sensor RI, and a second selection output end connected with the second end of the current sensor RI.

[0071] In the embodiment, the first bridge arm circuit 20 and the second bridge arm circuit 30 can control the electric explosion-proof valve 300 to realize opening and closing of the valve after the passive explosion-proof valve is changed to the electric explosion-proof valve. On the one hand, in order to prevent the electric explosion-proof valve 300 from being opened by mistake, the fifth switch tube Q5 can be arranged on the electric explosion-proof valve control circuit to ensure that the battery pack is in a normal operation state and the explosion-proof valve control loop is in a dormant state, thereby ensuring the accuracy of the control of the electric explosion-proof valve 300. On the other hand, the abnormal operation of the explosion-proof valve motor can also be monitored to prevent the explosion-proof valve motor from being damaged due to the risk of locked-rotor overcurrent, that is, the current sensor RI for monitoring the current of the explosion-proof valve motor is added to the electric explosion-proof valve control circuit. The working current of the explosion-proof valve motor is monitored, thereby ensuring the safety of the subsequent control of the explosion-proof valve motor 10. Because the sensor can be cancelled according to the maturity of the electric explosion-proof valve control circuit and the explosion-proof valve motor, the key switch and the line selector can be designed in the electric explosion-proof valve control circuit. When the key switch is pressed, the control end of the line selector is connected to the high level of the control power supply 200, and at this time the line selector can control the second selection output end to be connected to the selection input end, so that the current sensor RI is directly short-circuited at this time, thereby realizing the function of cancelling the current sensor RI. When the key switch is not pressed, the control end of the line selector is not connected to the high level of the control power supply 200, and at this time the line selector can control the first selection output end to be connected to the selection input end, so that the current sensor RI is directly connected to the circuit at this time, thereby realizing the function of selecting the current sensor RI. Therefore, the selective function of the current sensor RI can be realized based on the key switch and the line selector, and the functionality of the electric explosion-proof valve control circuit can be expanded.

[0072] Further, based on the first, third and fourth embodiments of the present application, the fifth embodiment of the electric explosion-proof valve control circuit of the present application is proposed. The first end of the current sensor RI is connected to the first end of the fifth switch tube Q5, and the second end of the current sensor RI is connected to the second end of the fifth switch tube Q5. Alternatively, the first end of the fifth switch tube Q5 is connected to the control power supply 200 through the current sensor RI, and the second end of the current sensor RI is connected to the first end of the first bridge arm circuit 20 and the first end of the second bridge arm circuit 30. Alternatively, the first end of the current sensor RI is connected to the control power supply 200 through the fifth switch tube Q5, and the second end of the fifth switch tube Q5 is connected to the first end of the first bridge arm circuit 20 and the first end of the second bridge arm circuit 30 through the current sensor RI.

[0073] In the embodiment, the current sensor RI and the fifth switch tube Q5 can be in parallel or series relationship, that is, the current sensor RI and the fifth switch tube Q5 can be simultaneously added to the entire electric explosion-proof valve control circuit to jointly realize respective functions, or the current sensor RI or the fifth switch tube Q5 can be separately added to separately realize respective functions. It is worth noting that, in order to ensure the safety of the entire circuit, other devices can also be connected to realize other functions, such as devices or circuits for limiting the current or voltage of the control power supply 200, to ensure the safety of the electric explosion-proof valve control circuit for controlling the explosion-proof valve motor 10 to rotate forward or reverse.

[0074] Based on the above embodiment of the electric explosion-proof valve control circuit, an electric explosion-proof valve is provided, which comprises the above electric explosion-proof valve control circuit.

[0075] In the embodiment, the above electric explosion-proof valve is connected to the output end of the explosion-proof valve motor through the valve position, and then the control chip in the electric explosion-proof valve control circuit controls the first bridge arm circuit to be in the first conduction state and controls the second bridge arm circuit to be in the second conduction state, so that the control power supply is input from the first input end and output from the second input end to control the explosion-proof valve motor to rotate forward and drive the valve position to open (that is, the electric explosion-proof valve opens). The first bridge arm circuit can also be controlled to be in the second conduction state, and the second bridge arm circuit can be controlled to be in the first conduction state, so that the control power supply is input from the second input end and output from the first input end to control the explosion-proof valve motor to rotate reverse and drive the valve position to close (that is, the electric explosion-proof valve closes), so as to realize intelligent opening and closing of the electric explosion-proof valve, thereby improving the intelligence of the explosion-proof valve control.

[0076] Based on the above embodiment of the electric explosion-proof valve control circuit, a vehicle is provided, which comprises the above electric explosion-proof valve and a battery pack, wherein the electric explosion-proof valve is arranged on the battery pack.

[0077] In the embodiment, the above vehicle is designed with the above electric explosion-proof valve on the battery pack, so as to control the electric explosion-proof valve to intelligently open and close based on the electric explosion-proof valve control circuit in the electric explosion-proof valve, thereby avoiding the phenomenon that the valve cannot be actively opened and closed when a passive explosion-proof valve is used. Such an electric explosion-proof valve control circuit can control the explosion-proof valve motor to rotate forward or reverse through the control chip to realize opening and closing of the electric explosion-proof valve, thereby improving the intelligence of the explosion-proof valve control.

[0078] The above is only part of the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made based on the technical concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A control circuit for an electric explosion-proof valve, characterized in that, The electric explosion-proof valve control circuit is applied to the electric explosion-proof valve, and the electric explosion-proof valve control circuit includes: An explosion-proof valve motor, the output end of which is connected to the valve position of the electric explosion-proof valve; The first bridge arm circuit has its first end connected to the control power supply and its midpoint connected to the first input end of the explosion-proof valve motor. The second bridge arm circuit has its first end connected to the first end of the first bridge arm circuit, its midpoint connected to the second input terminal of the explosion-proof valve motor, and its second end connected to the second end of the first bridge arm circuit and then grounded. A control chip is connected to the third terminal of the first bridge arm circuit and the third terminal of the second bridge arm circuit. The control chip is used to control the first bridge arm circuit to be in a first conducting state and control the second bridge arm circuit to be in a second conducting state, so that the control power is input from the first input terminal of the explosion-proof valve motor and drives the valve to open based on the forward rotation of the explosion-proof valve motor; or, it controls the first bridge arm circuit to be in the second conducting state and controls the second bridge arm circuit to be in the first conducting state, so that the control power is input from the second input terminal of the explosion-proof valve motor and drives the valve to close based on the reverse rotation of the explosion-proof valve motor. The first conducting state is a state in which the upper half bridge is conducting and the lower half bridge is closed, and the second conducting state is a state in which the upper half bridge is closed and the lower half bridge is conducting.

2. The electric explosion-proof valve control circuit as described in claim 1, characterized in that, The control chip includes a first control terminal and a second control terminal, and the first bridge arm circuit includes: A first switching transistor, wherein a first end of the first switching transistor is connected to the control power supply, a control end of the first switching transistor is connected to the first control end, and a second end of the first switching transistor is connected to the first input end; The second switch has its first end connected to the second end of the first switch, its control terminal connected to the second control terminal, and its second end grounded.

3. The electric explosion-proof valve control circuit as described in claim 2, characterized in that, The second bridge arm circuit includes: The third switch has a first terminal connected to the control power supply, a control terminal connected to the second control terminal, and a second terminal connected to the second input terminal. The fourth switch is connected to the second terminal of the third switch, the control terminal of the fourth switch is connected to the first control terminal, and the second terminal of the fourth switch is grounded.

4. The electric explosion-proof valve control circuit as described in claim 3, characterized in that, The first switch, the second switch, the third switch, and the fourth switch include one of a metal-oxide-semiconductor field-effect transistor, an insulated-gate bipolar transistor, and a transistor.

5. The electric explosion-proof valve control circuit as described in any one of claims 1 to 4, characterized in that, The control chip includes a drive control terminal, and the electric explosion-proof valve control circuit includes: The fifth switching transistor has its first terminal connected to the control power supply, its control terminal connected to the drive control terminal, and its second terminal connected to the first terminal of the first bridge arm circuit and the first terminal of the second bridge arm circuit.

6. The electric explosion-proof valve control circuit as described in claim 5, characterized in that, The control chip includes a current acquisition terminal, and the electric explosion-proof valve control circuit includes: A current sensor is provided, with its first end connected to the control power supply, its second end connected to the first end of the first bridge arm circuit and the first end of the second bridge arm circuit, and its acquisition end connected to the current acquisition end.

7. The electric explosion-proof valve control circuit as described in claim 6, characterized in that, The electric explosion-proof valve control circuit includes: A push-button switch, wherein the first end of the push-button switch is connected to the control power supply; A line selector, wherein the control terminal of the line selector is connected to the second terminal of the push-button switch, the selection input terminal of the line selector is connected to the control power supply, the first selection output terminal of the line selector is connected to the first terminal of the current sensor, and the second selection output terminal of the line selector is connected to the second terminal of the current sensor.

8. The electric explosion-proof valve control circuit as described in claim 6, characterized in that, The first end of the current sensor is connected to the first end of the fifth switching transistor, and the second end of the current sensor is connected to the second end of the fifth switching transistor; or, the first end of the fifth switching transistor is connected to the control power supply through the current sensor, and the second end of the current sensor is connected to the first end of the first bridge arm circuit and the first end of the second bridge arm circuit through the fifth switching transistor; or, the first end of the current sensor is connected to the control power supply through the fifth switching transistor, and the second end of the fifth switching transistor is connected to the first end of the first bridge arm circuit and the first end of the second bridge arm circuit through the current sensor.

9. An electric explosion-proof valve, characterized in that, The electric explosion-proof valve includes the electric explosion-proof valve control circuit according to any one of claims 1 to 8.

10. A vehicle, characterized in that, The vehicle includes the electric explosion-proof valve and battery pack as described in claim 9, wherein the electric explosion-proof valve is disposed on the battery pack.

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