In-place detection protection device and formation and capacity grading equipment
By designing an in-place detection and protection device in the chemical component capacity device, using the photocoupler and logic AND door to detect the tray status, the problem of the inability to close the driving signal when the battery tray is disengaged is solved, and the equipment is highly safe and reliable protection is achieved .
Patent Information
- Application Number
- CN202420479752.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-03-12
AI Technical Summary
In the chemical component storage device, when the battery tray is abnormally disengaged, the driving signal output cannot be turned off in time, resulting in the risk of device damage.
Design a position detection protection device, including a position detection module, a signal conversion module and a logic and module, detect the press-fit state of the battery tray through the photocoupler and a logic and door, and close the drive signal output when the tray is disengaged to prevent potential damage. .
It realizes timely protection when the battery tray is abnormally disengaged, improves the safety and reliability of the equipment, and avoids physical damage and potential accidents.
Smart Images
Figure CN222319099U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical fractionation and capacity equipment, in particular to an in-place detection protection device and chemical fractionation and capacity equipment. Background Art
[0002] "Chemicalization" means that before the battery is put into use, the battery is continuously charged and discharged to activate and optimize the internal chemical reaction of the battery and increase the effective capacity of the battery. This process helps to increase the available energy of the battery and optimize its performance. Through chemicalization, the electrode materials inside the battery will gradually form a stable electrochemical reaction and establish better contact with the electrolyte, thereby improving the capacity and performance of the battery. However, when the battery tray is abnormally detached, it is easy to damage the device. Utility Model Content
[0003] The technical purpose of the present application is to provide an in-place detection protection device, which provides a protection function by improving the structural connection relationship.
[0004] The technical purpose of this application is also to provide a safe and reliable power supply system that can shut down the drive signal output when the battery tray is abnormally detached, thereby achieving a protection function.
[0005] This application adopts the following technical solutions.
[0006] In a first aspect, the present application provides an in-place detection protection device, comprising:
[0007] An in-place detection module, wherein the in-place detection module has a first connection end and a second connection end;
[0008] A signal conversion module, the signal conversion module comprising a photoelectric coupler, the photoelectric coupler having a primary side and a secondary side, the primary side comprising a first pole and a second pole, the secondary side comprising a third pole and a fourth pole, the first pole being connected to the first connection end, and the second pole being connected to the second connection end;
[0009] A logic AND module, wherein the logic AND module has at least one AND gate, wherein the AND gate has a first input terminal, a second input terminal and an output terminal; the first input terminal is connected to the third terminal, and the fourth terminal is connected to a common terminal;
[0010] at least one input interface;
[0011] at least one output interface;
[0012] The input interface, the output interface and the AND gate correspond to each other; the input interface is connected to the second input end of the corresponding AND gate; and the output interface is connected to the output end of the corresponding AND gate.
[0013] Optionally, the in-place detection module includes a key switch or an in-place switch.
[0014] Optionally, the signal conversion module also includes a first resistor and a second resistor, the first pole is connected to the positive pole of the first power supply through the first resistor, the second pole is connected to the first common terminal, the third pole is connected to the positive pole of the second power supply through the second resistor, and the fourth pole is connected to the second common terminal.
[0015] Optionally, the in-place detection protection device further includes a power supply module;
[0016] The power input terminal of the power module is connected to an input voltage, and the output interface is connected to a control terminal of the power module.
[0017] Optionally, at least one AND gate includes a first AND gate, a second AND gate and a third AND gate, at least one of the input interfaces includes a first input interface, a second input interface and a third input interface, and at least one of the output interfaces includes a first output interface, a second output interface and a third output interface;
[0018] The first input end of the first AND gate, the first input end of the second AND gate and the first input end of the third AND gate are all connected to the third pole; the second input end of the first AND gate is connected to the first input interface, the second input end of the second AND gate is connected to the second input interface, and the second input end of the third AND gate is connected to the third input interface;
[0019] The output end of the first AND gate is connected to the first output interface, the output end of the second AND gate is connected to the second output interface, and the output end of the third AND gate is connected to the third output interface.
[0020] Optionally, the in-place detection protection device further comprises a power module; the power input terminal of the power module is connected to an input voltage;
[0021] The power module comprises a first MOS tube, a second MOS tube and a third MOS tube, the source and drain of the first MOS tube are connected in series with the source and drain of the third MOS tube, the source and drain of the second MOS tube are connected between a connection node and the ground GND, the connection node is located on a connection line between the first MOS tube and the third MOS tube, and the third MOS tube outputs a voltage;
[0022] The gate of the first MOS tube is connected to the first output interface, the gate of the second MOS tube is connected to the second output interface, and the gate of the third MOS tube is connected to the third output interface.
[0023] Optionally, the in-place detection protection device further includes a bypass board, and a power supply end of the bypass board is connected to the output voltage of the power supply module.
[0024] Optionally, the power module and the bypass board are communicatively connected.
[0025] Optionally, the in-position detection protection device further includes a transistor and a relay, and the output interface is connected to the base of the transistor.
[0026] One end of the coil of the relay is connected to the collector of the transistor, the other end of the coil is connected to the positive electrode of the third power supply, and a load is connected between the contact input end and the contact output end of the relay.
[0027] In a second aspect, the present application provides a chemical component capacity device, including a position detection protection device provided in any possible implementation manner of the first aspect.
[0028] Compared with the prior art, the in-place detection module provided in the embodiment of the present application further has a first connection terminal and a second connection terminal; a signal conversion module, the signal conversion module includes a photoelectric coupler, the photoelectric coupler has a primary side and a secondary side, the primary side includes a first pole and a second pole, the secondary side includes a third pole and a fourth pole, the first pole is connected to the first connection terminal, and the second pole is connected to the second connection terminal; a logic and module, the logic and module has at least one AND gate, the AND gate has a first input terminal, a second input terminal and an output terminal; the first input terminal is connected to the third pole, and the fourth pole is connected to the common terminal; at least one input interface; at least one output interface; wherein the input interface, the output interface and the AND gate correspond; the input interface is connected to the second input terminal of the corresponding AND gate; the output interface is connected to the output terminal of the corresponding AND gate. The present application provides a protection function by improving the structural connection relationship.
[0029] Compared with the prior art, the chemical fractionation equipment provided in the embodiment of the present application has all the technical effects of the above-mentioned in-place detection module, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0031] Figure 1 A schematic diagram of the circuit structure of the in-place detection protection device provided in Example 1 of the present application;
[0032] Figure 2 A schematic diagram of the circuit structure of the in-place detection protection device provided in Example 2 of the present application;
[0033] Figure 3 A schematic diagram of the circuit structure of the in-place detection protection device provided in Example 3 of the present application;
[0034] Figure 4 A schematic diagram of the circuit structure of a power module and a bypass board in the in-place detection protection device provided in Example 3 of the present application;
[0035] Figure 5 A schematic diagram of the circuit structure of a power module and a bypass board in the in-place detection protection device provided in Example 3 of the present application;
[0036] Figure 6 A schematic diagram of the circuit structure of a power module and a bypass board in the in-place detection protection device provided in Example 4 of the present application;
[0037] Figure 7 A schematic diagram of the structure of a chemical fractionation and capacity separation device provided in an embodiment of the present application;
[0038] Reference numerals:
[0039] 100-in-place detection protection device, 200-chemical component capacity equipment, 11-in-place detection module, 12-signal conversion module, 13-logic AND module, 14-input interface, 15-output interface, 16-power module, 17-bypass board, 18-relay, 19-transistor, 111-key switch, 121-photoelectric coupler, 131-first AND gate, 132-second AND gate, 133-third AND gate, 141-first input interface, 142-second input interface, 143-third input interface, 151-first output interface, 152-second output interface, 153-third output interface, 161-first MOS tube, 162-second MOS tube, 163-third MOS tube. DETAILED DESCRIPTION
[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0041] In the chemical dispensing equipment, "battery tray" is a tray or container specially used to store and support batteries, which can place the batteries on a flat surface. The storage location is used to place and store battery trays. When entering the warehouse, the battery trays are placed in the corresponding storage location.
[0042] When the battery tray is abnormally disconnected, the drive signal output cannot be turned off in time, which can easily damage the device. For example, when the high-series power module of the capacity-combined application is in the charging process, if the battery load is abnormally disconnected, the switching board or bypass board will be subjected to the high voltage and energy output by the power module, causing the risk of damage to the switching board or bypass board.
[0043] If the battery tray is abnormally detached, the battery may become unstable or fall out of the device. If the drive signal continues to be output, the device may continue to operate, which may easily cause physical damage to the device.
[0044] The in-place detection protection device 100 provided in the embodiment of the present application includes an in-place detection module 11, which can detect the in-place signal of the storage position. When the pallet is abnormally disengaged, protection is carried out in time according to the in-place signal, and the control output signal is turned off, so as to prevent potential damage or accidents in time. By using the in-place detection module 11 to realize the in-place signal detection, the in-place detection protection device 100 has higher safety and reliability.
[0045] The present application is further described below in conjunction with the accompanying drawings and specific embodiments.
[0046] Embodiment 1
[0047] See also Figure 1 , Figure 1 The in-place detection protection device 100 provided in this embodiment is shown, including an in-place detection module 11, a signal conversion module 12, a logic and module 13, at least one input interface 14 and at least one output interface 15, and the input interface 14, the output interface 15 correspond to the AND gate. The in-place detection module 11 has a first connection end and a second connection end; the signal conversion circuit includes a photoelectric coupler 121, the photoelectric coupler 121 has a primary side and a secondary side, the primary side includes a first pole and a second pole, the secondary side includes a third pole and a fourth pole, and the first pole and the second pole are connected to the in-place detection module 11; the logic and module 13 has at least one AND gate, and the AND gate has a first input end, a second input end and an output end; the first input end is connected to the third pole; the input interface 14 is connected to the second input end of the corresponding AND gate; the output interface 15 is connected to the output end of the corresponding AND gate.
[0048] The in-place detection module 11 can be arranged at a designated position of the storage location, and is used to detect whether the battery tray is pressed in place and convert it into a pressed in place electrical signal.
[0049] In some embodiments, the in-place detection module 11 has a physical trigger mechanism, which is used to be set corresponding to the target object to be detected in-place. In some embodiments, the physical trigger mechanism is a key cap.
[0050] In some embodiments, the in-place detection module 11 includes a key switch 111, and the two ends of the key switch 111 are respectively connected to the first pole and the second pole. The key switch 111 includes a button or a key cap, and when the battery tray is pressed into place, the key cap is pressed as a physical trigger mechanism, and when the battery tray is abnormally disengaged, the key cap is released, thereby changing the state of the switch.
[0051] In some other embodiments, the in-place detection module 11 may include an in-place switch, which can detect whether the battery tray has reached a specific position or state. A mechanical limit switch is a common in-place switch that uses a mechanical trigger mechanism to detect the position of an object. When an object touches or applies pressure to the mechanical trigger mechanism of the mechanical limit switch, the switch switches state, thereby indicating that the object has reached or left a specific position.
[0052] As an implementation mode, the signal conversion module 12 also includes a first resistor R1 and a second resistor R2, the first pole is connected to the first power supply positive pole VCC1 through the first resistor R1, the second pole is connected to the first common terminal GND1, the third pole is connected to the second power supply positive pole VCC2 through the second resistor R2, and the fourth pole is connected to the second common terminal GND2.
[0053] In a specific embodiment, the input interface 14 can be connected to a control signal, such as a PWM signal.
[0054] Optionally, the photocoupler 121 uses a PC817C photocoupler. By using a photocoupler to detect the in-position signal, the in-position detection protection device has higher safety and reliability. The coupling effect of the photocoupler can effectively isolate the input and output and reduce the impact of external interference on the device.
[0055] Figure 1 The working principle of the in-place detection protection device 100 shown is:
[0056] When the battery tray is pressed into place, the push switch 111 is pressed, and there is no voltage between the first polarity and the second polarity of the primary side of the photocoupler 121, so no light signal can be generated. The phototransistor does not receive the light signal and is therefore not turned on. The third pole of the photocoupler 121 is pulled up by the second resistor R2, and the AND gate performs a logical AND on the signal of the third pole and the control signal received by the input interface 14. The output signal is determined by the control signal received by the input interface 14.
[0057] When the battery tray is abnormally detached, the push switch 111 is released, and there is a voltage difference between the first polarity and the second polarity of the primary side of the photocoupler 121. The light-emitting diode is turned on to generate a light signal. The phototransistor is turned on after receiving the light signal, and the third pole of the photocoupler 121 is pulled low. At this time, no matter what control signal the input interface 14 receives, the signal output by the output interface 15 is zero. Therefore, when the battery tray is abnormally detached, the drive signal output can be turned off in time to provide a protection function.
[0058] In some embodiments, the in-place detection protection device 100 also includes a power module 16; the power input end of the power module 16 is connected to the input voltage Vin, and the output interface 15 is connected to the control end of the power module 16. The control end of the power module 16 receives a switch signal for controlling the start and stop of the power module 16. When the battery tray is abnormally disengaged, the output of the output port is promptly turned off to cut off the power supply, disconnect the relay or the anti-reverse connection, etc., to avoid the risk of device damage. If the switching board or bypass board continues to bear the high voltage and energy output by the power supply after the battery tray is disengaged, it is easy to cause over-power damage to the switching board or bypass board, or if the power module 16 continues to supply power after the battery tray is abnormally disengaged, the probe and the battery pole may spark.
[0059] Embodiment 2
[0060] like Figure 2 As shown, the in-place detection protection device 100 provided in this embodiment is based on the first embodiment, and the logic AND module 13 includes a first AND gate 131, a second AND gate 132 and a third AND gate 133. The input interface 14 in the in-place detection protection device 100 includes a first input interface 141, a second input interface 142 and a third input interface 143, and the output interface 15 includes a first output interface 151, a second output interface 152 and a third output interface 153; the first input end of the first AND gate 131, the first input end of the second AND gate 132 and the first input end of the third AND gate 133 are all connected to the third pole; the second input end of the first AND gate 131 is connected to the first input interface 141, the second input end of the second AND gate 132 is connected to the second input interface 142, and the second input end of the third AND gate 133 is connected to the third input interface 143; the output end of the first AND gate 131 is connected to the first output interface 151, the output end of the second AND gate 132 is connected to the second output interface 152, and the output end of the third AND gate 133 is connected to the third output interface 153.
[0061] In some embodiments, if different control signals are input to the first input interface 141, the second input interface 142 and the third input interface 143 respectively, different devices can be controlled. Through the in-position detection protection device 100, multiple control signal outputs can be turned off at the same time, which has more flexible functions and application scenarios.
[0062] In practical applications, the logic and module 13 may use a CD4081BM96 integrated circuit (IC), which is a model of the CD4081 series. The CD4081 series is a set of four two-input AND gates (AND gates) integrated circuits, each gate having two input pins and one output pin. Devices in this series are widely used in many digital and analog applications.
[0063] Embodiment 3
[0064] Based on Example 2, see Figure 3 and Figure 4 , the in-place detection protection device 100 provided in this embodiment also includes a power supply module 16; in order to facilitate the description of the technical solution, Figure 4 The power module 16 is only a schematic diagram, and the power input end of the power module 16 is connected to the input voltage Vin; the power module 16 includes a first MOS tube 161, a second MOS tube 162 and a third MOS tube 163, the source and drain of the first MOS tube 161 are connected in series with the source and drain of the third MOS tube 163, the source and drain of the second MOS tube 162 are connected between the connection node and the ground GND, and the connection node is located on the connection line between the first MOS tube 161 and the third MOS tube 163, and the third MOS tube 163 outputs the voltage; the gate of the first MOS tube 161 is connected to the first output interface 151, the gate of the second MOS tube 162 is connected to the second output interface 152, and the gate of the third MOS tube 163 is connected to the third output interface 153.
[0065] The power module 16 can realize effective power control and flexibly control the switching and disconnection states of the power supply by connecting the first MOS tube 161 and the third MOS tube 163 in series, and connecting the source of the second MOS tube 162 between the connection node and the ground GND. When the battery tray is abnormally disengaged, the in-place detection protection device 100 can turn off the three control signals PWM1, PWM2 and PWM3 at the same time, completely turning off the output of the power module 16, thereby improving safety and reliability.
[0066] Please continue to see Figure 4 ,exist Figure 4 In the embodiment, the in-place detection protection device 100 further includes a bypass board 17, and the power supply end of the bypass board 17 is connected to the output voltage of the power module 16. The bypass board 17 includes a plurality of bypass units, each of which includes a bypass branch and a battery branch, and each bypass branch is provided with a bypass switch (such as Figure 4 M1, M2, ..., Mn), each battery branch includes batteries C1, C2, ..., Cn, and control switches N1, N2, ..., Nn for switching each battery branch.
[0067] When the high-series power module 16 of the capacity-splitting application is in the charging step, the battery load is abnormally disconnected, and the switching plate or bypass plate 17 will be subjected to the high voltage and energy output by the power module 16, causing the risk of damage to the switching plate or bypass plate 17. The in-place detection protection device 100 provided in the embodiment of the present application includes an in-place detection module 11, which can detect the in-place signal of the storage position. When the pallet is abnormally disconnected, it can be protected in time according to the in-place signal of the in-place pressing, and the control output signal can be turned off to prevent potential damage or accidents in time.
[0068] like Figure 5 As shown, in some embodiments, the power module 16 and the bypass board 17 are communicatively connected, such as the power module 16 and the bypass board 17 can communicate via RS485 communication protocol.
[0069] Embodiment 4
[0070] like Figure 6 As shown, on the basis of Example 1, the in-place detection protection device 100 provided in this embodiment also includes a transistor 19 and a relay 18, the output interface is connected to the base of the transistor 19, the emitter of the transistor 19 is connected to the ground GND, the coil of the relay 18 is connected between the collector of the transistor 19 and the positive pole of the third power supply, and the load is connected between the contact input terminal and the contact output terminal of the relay 18.
[0071] The working principle of the in-place detection protection device 100 provided in this embodiment is:
[0072] When the battery tray is pressed into place, the key switch 111 is pressed, and there is no voltage between the primary first polarity and the second polarity of the photocoupler 121, and no optical signal can be generated. The phototransistor does not receive the optical signal and therefore does not conduct. The third polarity of the photocoupler 121 is pulled high by the second resistor R2, and the signal at the third polarity of the AND gate is logically ANDed with the control signal received by the input interface 14, and the output signal is determined by the control signal received by the input interface 14. If the signal received by the input interface 14 is at a high level, the transistor 19 is turned on, and when the coil of the relay 18 is activated, a magnetic field is generated, causing the mechanical contacts to close, thereby connecting the load.
[0073] When the battery tray is abnormally disconnected, the key switch 111 is released, there is a voltage difference between the first polarity and the second polarity of the primary side of the photocoupler 121, the light-emitting diode is turned on, and a light signal is generated. The phototransistor is turned on after receiving the light signal, and the third polarity of the photocoupler 121 is pulled low. At this time, no matter what control signal the input interface 14 receives, the signal output by the output interface is zero, the transistor 19 cannot be turned on, the coil of the relay 18 is not activated, and the mechanical contact is disconnected, thereby disconnecting the load. Therefore, when the battery tray is abnormally disconnected, the drive signal output can be turned off in time to provide a protection function.
[0074] The in-place detection protection device 100 provided in the embodiment of the present application provides a protection function by improving the structural connection relationship. The in-place detection module 11 can detect the mechanical state of whether the storage position is in place, convert the mechanical state into an electrical signal, the signal conversion module 12 converts the electrical signal, and the logic module 13 inputs the converted electrical signal, thereby affecting the output of the output interface 15; when the battery tray is abnormally disengaged, the protection function can be realized.
[0075] like Figure 7 As shown, the embodiment of the present application further provides a chemical separation and containment device 200, and the chemical separation and containment device 200 includes the in-place detection protection device 100 provided in the above embodiment.
[0076] Compared with the prior art, the chemical fractionation equipment 200 provided in the embodiment of the present application can detect the pressing-in-place signal in real time and provide timely protection, thereby avoiding the risk of damage caused by abnormal detachment of the storage position and having high reliability and safety.
[0077] The block diagrams of the circuits, devices, apparatuses, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these circuits, devices, apparatuses, equipment, and systems may be connected, arranged, or configured in any manner as long as the desired purpose can be achieved.
[0078] Those skilled in the art should understand that the above-mentioned specific embodiments are merely examples and not limitations, and various modifications, combinations, partial combinations and replacements may be made to the embodiments of the utility model according to design requirements and other factors. As long as they are within the scope of the attached claims or their equivalents, they belong to the scope of rights to be protected by the utility model.
Claims
1. A detection protection device, characterized in that: include: An in-place detection module, wherein the in-place detection module has a first connection end and a second connection end; A signal conversion module, the signal conversion module includes a photoelectric coupler, the photoelectric coupler has a primary side and a secondary side, the primary side includes a first pole and a second pole, the secondary side includes a third pole and a fourth pole, the first pole is connected to the first connection end, the second pole is connected to the second connection end, and the fourth pole is connected to a common end; A logic AND module, wherein the logic AND module has at least one AND gate, wherein the AND gate has a first input terminal, a second input terminal and an output terminal; the first input terminal is connected to the third terminal; at least one input interface; at least one output interface; Among them, the input interface, the output interface and the AND gate correspond to each other; the input interface is connected to the second input end of the corresponding AND gate; and the output interface is connected to the output end of the corresponding AND gate.
2. The in-place detection protection device according to claim 1, characterized in that: The in-place detection module includes a key switch or an in-place switch.
3. The in-place detection protection device according to claim 1, characterized in that: The signal conversion module also includes a first resistor and a second resistor, the first pole is connected to the positive pole of the first power supply through the first resistor, the second pole is connected to the first common end, the third pole is connected to the positive pole of the second power supply through the second resistor, and the fourth pole is connected to the second common end.
4. The in-place detection protection device according to claim 1, characterized in that: The in-place detection protection device also includes a power supply module; The power input terminal of the power module is connected to an input voltage, and the output interface is connected to a control terminal of the power module.
5. The in-place detection protection device according to claim 1, characterized in that: At least one AND gate includes a first AND gate, a second AND gate and a third AND gate, at least one of the input interfaces includes a first input interface, a second input interface and a third input interface, and at least one of the output interfaces includes a first output interface, a second output interface and a third output interface; The first input end of the first AND gate, the first input end of the second AND gate and the first input end of the third AND gate are all connected to the third pole; the second input end of the first AND gate is connected to the first input interface, the second input end of the second AND gate is connected to the second input interface, and the second input end of the third AND gate is connected to the third input interface; The output end of the first AND gate is connected to the first output interface, the output end of the second AND gate is connected to the second output interface, and the output end of the third AND gate is connected to the third output interface.
6. The in-place detection protection device according to claim 5, characterized in that: The in-place detection protection device further comprises a power module; the power input terminal of the power module is connected to the input voltage; The power module comprises a first MOS tube, a second MOS tube and a third MOS tube, the source and drain of the first MOS tube are connected in series with the source and drain of the third MOS tube, the source and drain of the second MOS tube are connected between a connection node and a ground GND, the connection node is located on a connection line between the first MOS tube and the third MOS tube, and the third MOS tube outputs a voltage; The gate of the first MOS tube is connected to the first output interface, the gate of the second MOS tube is connected to the second output interface, and the gate of the third MOS tube is connected to the third output interface.
7. The in-place detection protection device according to claim 6, characterized in that: The in-place detection protection device further comprises a bypass board, and a power supply end of the bypass board is connected to the output voltage of the power supply module.
8. The in-place detection protection device according to claim 7, characterized in that: The power module is communicatively connected to the bypass board.
9. The in-place detection protection device according to claim 1, characterized in that: The in-place detection protection device also includes a transistor and a relay, the output interface is connected to the base of the transistor, one end of the coil of the relay is connected to the collector of the transistor, the other end of the coil is connected to the positive electrode of the third power supply, and a load is connected between the contact input end and the contact output end of the relay.
10. A chemical fractionation device, characterized in that: The chemical fractionation equipment comprises the in-place detection protection device as described in any one of claims 1 to 9.