Safe device for recycling brake energy based on super capacitor

Abstract

The utility model relates to a safe device for recycling brake energy based on a super capacitor. The safe device comprises a first circuit board, a second circuit board, a first plug-in port, a second plug-in port used for being connected with the first plug-in port in a pluggable mode and a fingerprint identification circuit used for being connected with the second plug-in port. The first plug interface, the DC bus, the super capacitor, the rectifier bridge BD1, the system control module, the super capacitor charging and discharging switching module and the super capacitor charging current-limiting control module are all arranged on the first circuit board, and the second plug interface and the second fingerprint identification circuit are both arranged on the second circuit board. The main control circuit is connected with the fingerprint identification circuit through the first plugging port and the second plugging port; safety protection of the oil pumping unit is achieved, the oil pumping unit is prevented from being operated by non-professionals, then the oil pumping unit is responsible for a special person and a special machine, if the fingerprint function goes wrong, the second circuit board can be directly disassembled for maintenance and replacement, and maintenance convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pumping unit variable-frequency motor technology field, especially a kind of safety type based on super capacitor recycling brake energy's device. BACKGROUND

[0002] Energy saving and emission reduction is a global trend, all walks of life to improve energy efficiency, reduce energy waste.

[0003] The pumping unit used in current oil extraction is mainly divided into two categories, beam pumping unit and vertical pumping unit. The vertical pumping unit often adjusts the corresponding counterweight in the work due to the change of underground oil reservoir and downhole working condition to achieve the purpose of reducing power consumption and saving energy.

[0004] When pumping unit does reciprocating motion, motor exists brake action.

[0005] When motor brakes, it will convert mechanical energy into electrical energy to raise the direct current bus voltage of frequency converter.

[0006] The safety factor of existing pumping unit is not high, and it is easy for non-professionals to use privately, so it is difficult to guarantee the professionalism of pumping and the safety of equipment use.

[0007] Therefore, in the utility model patent application, the applicant carefully studies a kind of safety type based on super capacitor recycling brake energy's device to solve the above problems. CONTENT OF UTILITY MODEL

[0008] The utility model mainly aims at providing a kind of safety type based on super capacitor recycling brake energy's device to solve the above problems, which realizes the safety protection of pumping unit, prevents pumping unit from being operated by non-professionals, then realizes that special person is responsible for special machine, and if fingerprint function appears problem, second circuit board can be directly removed for maintenance and replacement, improve maintenance convenience.

[0009] To achieve the above purpose, the utility model takes the following technical solutions:

[0010] A kind of safety type based on super capacitor recycling brake energy's device, including direct current bus, super capacitor, rectifier bridge BD1, system control module, super capacitor charge-discharge switching module and super capacitor charging current-limiting control module;

[0011] The direct current bus is connected with super capacitor by rectifier bridge BD1, the super capacitor charge-discharge switching module and super capacitor charging current-limiting control module are connected with super capacitor respectively, and rectifier bridge BD1 is connected with super capacitor charge-discharge switching module;

[0012] The system control module comprises a main control circuit, which is connected with the super capacitor charging and discharging switching module and the super capacitor charging current limiting control module respectively.

[0013] The system further comprises a first circuit board, a second circuit board, a first plug interface, a second plug interface for plugging connection with the first plug interface, and a fingerprint identification circuit for connection with the second plug interface.

[0014] The first plug interface, the DC bus, the super capacitor, the rectifier bridge BD1, the system control module, the super capacitor charging and discharging switching module, and the super capacitor charging current limiting control module are arranged on the first circuit board, the second plug interface and the second fingerprint identification circuit are arranged on the second circuit board, and the main control circuit is connected with the fingerprint identification circuit through the first plug interface and the second plug interface.

[0015] The first plug interface has first pin 1 to first pin 4, and the second plug interface has second pin 1 to second pin 4 correspondingly.

[0016] The main control circuit comprises a main control chip U14, which has main control pin 1 to main control pin 48, main control pin 1 is connected with first pin 1, main control pin 16 is connected with first pin 2, first pin 17 is connected with first pin 3, and main control pin 23 is connected with first pin 4.

[0017] The fingerprint identification circuit comprises a fingerprint identification chip U20, which has fingerprint identification pin 1 to fingerprint identification pin 4, fingerprint identification pin 1 is connected with second pin 1, fingerprint identification pin 2 is connected with second pin 2, fingerprint identification pin 3 is connected with second pin 3, and fingerprint identification pin 4 is connected with second pin 4.

[0018] The first plug interface and the second plug interface are connected, the first pin 1 is connected with the second pin 1, the first pin 2 is connected with the second pin 2, the first pin 3 is connected with the second pin 3, and the first pin 4 is connected with the second pin 4.

[0019] As a preferred solution, the system further comprises a voice playing circuit and a loudspeaker arranged on the first circuit board, and the voice playing circuit is connected with the main control circuit and the loudspeaker respectively.

[0020] As a preferred solution, the voice playing circuit comprises a voice chip U40, which has voice pin 1 to voice pin 8,

[0021] Main control pin 18 is connected with voice pin 1, main control pin 40 is connected with voice pin 2, voice pin 5 and voice pin 7 are connected with two ends of the loudspeaker respectively, voice pin 6 is used for connecting a 3V3 voltage end, voice pin 6 is further grounded through a capacitor C40, and voice pin 8 is grounded.

[0022] As a preferred solution, a key circuit is further arranged on the first circuit board, and the key circuit is connected to the master control circuit.

[0023] As a preferred solution, the key circuit comprises a first key SW1 and a second key SW2.

[0024] One end of the first key SW1 is connected to the master control pin 41, one end of the second key SW2 is connected to the master control pin 42, and the other ends of the first key SW1 and the second key SW2 are both grounded.

[0025] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically: it mainly separately arranges the fingerprint identification circuit and the second plug-in interface on the second circuit board, on the one hand, realizes safety protection of the pumping unit, prevents the pumping unit from being operated by non-professionals, and then realizes that a person is responsible for a machine, on the other hand, if the fingerprint function has a problem, the second circuit board can be directly removed for maintenance and replacement, and the maintenance convenience is improved.

[0026] Secondly, through the voice playing circuit, the fingerprint identification condition can be directly understood, and the use convenience is improved.

[0027] In order to more clearly set forth the structural features and functions of the utility model, the following will be combined with the specific embodiments to be described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the approximate control principle block diagram of the embodiment of the utility model;

[0029] Figure 2 It is the first local circuit principle diagram on the first circuit board of the embodiment of the utility model (mainly shows the first plug-in interface and the master control circuit of the system control module);

[0030] Figure 3 It is the circuit principle diagram on the second circuit board of the embodiment of the utility model (mainly shows the fingerprint identification circuit and the second plug-in interface);

[0031] Figure 4 It is the second local circuit principle diagram on the first circuit board of the embodiment of the utility model (mainly shows the voice playing circuit and the loudspeaker);

[0032] Figure 5 It is the third local circuit principle diagram on the first circuit board of the embodiment of the utility model (mainly shows the key circuit);

[0033] Figure 6 It is the fourth local circuit principle diagram on the first circuit board of the embodiment of the utility model (mainly shows another local circuit of the system control module);

[0034] Figure 7 is the super capacitor charging and discharging switching module circuit principle diagram (including DC bus, rectifier bridge BD1 and super capacitor) of the embodiment of the utility model;

[0035] Figure 8 is the super capacitor charging current limiting control module circuit principle diagram of the embodiment of the utility model.

[0036] Explanation of reference numerals:

[0037] 10, first circuit board 101, first plug interface

[0038] 11, DC bus 12, super capacitor

[0039] 13, voice playing circuit

[0040] 14, loudspeaker 15, keying circuit

[0041] 20, super capacitor charging and discharging switching module

[0042] 21, current detection circuit

[0043] 30, super capacitor charging current limiting control module

[0044] 31, constant current constant voltage control circuit 32, first drive circuit

[0045] 33, second drive circuit

[0046] 40, second circuit board 401, second plug interface

[0047] 41, fingerprint identification circuit

[0048] 51, main control circuit. DETAILED DESCRIPTION

[0049] The utility model will be further described below in combination with the drawings and specific embodiments.

[0050] As Figures 1 to 8 shown, a safe type brake energy recycling device based on super capacitor 12 includes DC bus 11, super capacitor 12, rectifier bridge BD1, system control module, super capacitor charging and discharging switching module 20, super capacitor charging current limiting control module 30, first circuit board 10, second circuit board 40, first plug interface 101, second plug interface 401 for plugging connection with first plug interface 101, and fingerprint identification circuit 41 for connection with second plug interface 401. In this embodiment, the super capacitor 12 is also the super capacitor BATT in Figure 7 .

[0051] The first plug interface 101, the DC bus 11, the super capacitor 12, the rectifier bridge BD1, the system control module, the super capacitor charge-discharge switching module 20 and the super capacitor charge current limiting control module 30 are arranged on the first circuit board 10. The first circuit board 10 is also provided with a voice playing circuit 13, a loudspeaker 14 and a key circuit 15. In the embodiment, the loudspeaker 14 is also a loudspeaker SPK in Figure 4

[0052] The DC bus 11 connects the super capacitor 12 through the rectifier bridge BD1, and the super capacitor charge-discharge switching module 20 and the super capacitor charge current limiting control module 30 are connected to the super capacitor 12, and the rectifier bridge BD1 is connected to the super capacitor charge-discharge switching module 20.

[0053] The super capacitor charge-discharge switching module 20 includes a diode D5, a diode D6, a diode D1, a diode D2, a diode D3, a diode D4, a diode D7, a voltage stabilizing diode ZD1, a resistor R18, a resistor R19, a resistor R20, a resistor R22, a resistor R23, a resistor R24, an IGBT tube Q1, an IGBT tube Q2, a transformer T1, a current detection circuit 21 and inductors L1 and L2 connected in series;

[0054] One end of the DC bus 11 is connected to the positive electrode of the super capacitor 12 and the cathode of the diode D5, and the other end of the DC bus 11 is connected to the pin 2 and the pin 3 of the rectifier bridge BD1 at the same time, and the pin 2 of the rectifier bridge BD1 is also connected to the current detection circuit 21 through the resistor RS2;

[0055] The non-series node of the inductor L1 is connected to the negative electrode of the super capacitor 12 and the pin 1 of the rectifier bridge BD1 at the same time, the collector of the IGBT tube Q1 is connected to the non-series node of the inductor L1 through the resistor R21, the non-series node of the inductor L2 is connected to the anode of the diode D5 and the first end 1 of the main coil of the transformer T1 at the same time, the second end 2 of the main coil of the transformer T1 is connected to the collector of the IGBT tube Q2, the third end 4 of the auxiliary coil of the transformer T1 is connected to the cathode of the diode D7 and the anode of the diode D6, the anode of the diode D6 is also grounded through the resistor R25, the cathode of the diode D6 is connected to the super capacitor charge current limiting control module 30, the fourth end 3 of the auxiliary coil of the transformer T1 is connected to the cathode of the voltage stabilizing diode ZD1 and grounded, and the anode of the voltage stabilizing diode ZD1 is connected to the anode of the diode D7;

[0056] ​The emitter of the IGBT tube Q1, the anode of the diode D2, the emitter of the IGBT tube Q2 and the anode of the diode D4 are connected to the current detection circuit 21 and grounded, the cathode of the diode D2 is connected to the base of the IGBT tube Q1, the resistor R19 and the resistor R20 are connected in series, the non-series node of the resistor R19 and one end of the resistor R20 are connected to the super capacitor charging current limiting control module 30, the other end of the resistor R19 is connected to the cathode of the diode D1, and the series node of the resistor R19 and the resistor R20 is connected to the anode of the diode D1 and the base of the IGBT tube Q1 respectively;

[0057] The cathode of the diode D4 is connected to the base of the IGBT tube Q2, the resistor R23 and the resistor R24 are connected in series, the non-series node of the resistor R23 and one end of the resistor R24 are connected to the super capacitor charging current limiting control module 30, the other end of the resistor R23 is connected to the cathode of the diode D3, and the series node of the resistor R23 and the resistor R24 is connected to the anode of the diode D3 and the base of the IGBT tube Q2 respectively.

[0058] When the voltage of the super capacitor BATT is lower than the first preset value (500V), the IGBT tube Q1 is turned on, and the current on one end of the DC bus 11 passes through the super capacitor BATT, the resistor R21 and the IGBT tube Q1 in sequence to pre-charge the super capacitor BATT.

[0059] When the voltage of the super capacitor BATT reaches a certain voltage, the IGBT tube Q1 is turned off, the IGBT tube Q2 is turned on, and the current on one end of the DC bus 11 passes through the super capacitor BATT, the inductor L2, the inductor L1, the main coil of the transformer T1 and the IGBT tube Q2 in sequence to charge the super capacitor BATT with constant current.

[0060] When the IGBT tube Q2 is turned on, the current passing through the inductor L2 and the inductor L1 starts to increase. When the current passing through the inductor L2 and the inductor L1 reaches a set value, the IGBT tube Q2 is turned off. Due to the characteristics of the inductor L2 and the inductor L1, the current passing through the inductor L2 and the inductor L1 continues to charge the super capacitor BATT, but no longer passes through the IGBT tube Q2 but through the diode D5.

[0061] The IGBT tube Q2 is periodically turned on and off, so that the super capacitor BATT is quickly and efficiently charged, and the charging efficiency can reach 98%. Thus, the excessive power on the DC bus 11 is recovered into the super capacitor 12.

[0062] When the pumping unit variable frequency motor needs a large amount of electricity, it will pull down the voltage of the DC bus 11, and the voltage on the super capacitor BATT will be higher than the DC bus 11, at this time the rectifier bridge DB1 will be naturally turned on, and the super capacitor BATT will discharge to the DC bus 11, realizing the use of the electric energy of the super capacitor BATT, and the electric energy can reach 20kw.

[0063] In the embodiment, as shown in Figure 7 The current detection circuit 21 includes a current detection chip U3, a capacitor C11, a capacitor C10 and a capacitor C12.

[0064] The pin 3 and the pin 4 of the current detection chip U3 are connected to the pin 3 of the rectifier bridge BD1 through the resistor RS2, the pin 1 and the pin 2 of the current detection chip U3 are connected to the anode of the diode D4 and grounded, the pin 5 of the current detection chip U3 is grounded, the pin 6 of the current detection chip U3 is connected to the pin 5 of the current detection chip U3 through the capacitor C12, the pin 7 of the current detection chip U3 is connected to the super capacitor charging current limiting control module 30, the pin 8 of the current detection chip U3 is connected to the voltage end 3.3V-MCU, the pin 8 of the current detection chip U3 is connected to the pin 5 of the current detection chip U3 through the capacitor C11, and the capacitor C10 is connected across the capacitor C11.

[0065] In the embodiment, the super capacitor charging current limiting control module 30 includes a constant current and constant voltage control circuit 31, a first drive circuit 32 for driving the IGBT tube Q1, and a second drive circuit 33 for driving the IGBT tube Q2.

[0066] The output end of the current detection circuit 21 is connected to the constant current and constant voltage control circuit 31, the output end of the constant current and constant voltage control circuit 31 is connected to the first drive circuit 32 and the second drive circuit 33 respectively, the output end of the first drive circuit 32 is connected to the base of the IGBT tube Q1 through the resistor R18 and the diode D1, and the output end of the second drive circuit 33 is connected to the base of the IGBT tube Q2 through the resistor R22 and the diode D3.

[0067] As shown in Figure 8 In the embodiment, the constant current and constant voltage control circuit 31 includes a constant current and constant voltage control chip U9, a capacitor C25, a resistor R33, a diode D9, a resistor R34, a diode D8, a resistor R32, a light emitting device U7B and a resistor R35.

[0068] The pin 8 of the constant current and constant voltage control chip U9 is grounded through the capacitor C23, the pin 3 of the constant current and constant voltage control chip U9 is grounded through the capacitor C24, the pin 6 of the constant current and constant voltage control chip U9 is connected with the pin 3 thereof, the pin 4 of the constant current and constant voltage control chip U9 is grounded, the pin 5 of the constant current and constant voltage control chip U9 is connected with the output end of the current detection circuit 21 through the resistor R34, the pin 5 of the constant current and constant voltage control chip U9 is also grounded through the resistor R33, and the pin 5 of the constant current and constant voltage control chip U9 is also connected with the pin 7 of the constant current and constant voltage control chip U9 through the capacitor C25.

[0069] The pin 7 of the constant current and constant voltage control chip U9 is connected with the anode of the diode D9, the cathode of the diode D9 is the output end of the constant current and constant voltage control circuit 31, the pin 4 of the light emitting device U7B is connected with one end of the resistor R32, the other end of the resistor R32 is used for connecting the voltage end 3.3V-MCU, the pin 3 of the light emitting device U7B is connected with the anode of the diode D8, and the cathode of the diode D8 is connected with the cathode of the diode D9.

[0070] As shown in Figure 8 In the embodiment, the first driving circuit 32 comprises the MOS tube Q3, the resistor R37, the capacitor C27, the chip U10 and the chip U11.

[0071] The pin 1 and the pin 8 of the chip U10 are commonly connected with the drain of the MOS tube Q3, the gate of the MOS tube Q3 is connected with the output end of the constant current and constant voltage control circuit 31, the pin 8 of the chip U10 is grounded through the capacitor C26, the pin 2 and the pin 4 of the chip U10 are commonly connected with one end of the resistor R37, the other end of the resistor R37 is used for connecting the PWM2 pin of the main control circuit 51, the pin 6 of the chip U10 is used for connecting the voltage end VCC-12V, the pin 6 of the chip U10 is also grounded through the capacitor C34, the capacitor C27 is connected in parallel with the capacitor C34, and the pin 3 of the chip U10 is grounded.

[0072] The pin 7 of the chip U10 is connected with the pin 1 of the chip U11 through the resistor R38, the pin 3 and the pin 4 of the chip U11 are grounded, the pin 6 of the chip U11 is used for connecting the voltage end VCC-12V-2, the pin 6 of the chip U11 is also grounded through the capacitor C28, and the pin 5 of the chip U11 is connected with the base of the IGBT tube Q1 through the resistor R18 and the diode D1.

[0073] The PWM2 signal output by the chip U14 is transmitted to the chip U10 through the resistor R37, the chip U10 amplifies the signal and transmits the amplified signal to the chip U11 through the resistor R38, and the chip U11 drives the IGBT tube Q1.

[0074] As shown in Figure 8As shown, in the embodiment, the second driving circuit 33 comprises a MOS tube Q4, a diode D10, a resistor R39, a resistor R41, a capacitor C29, a capacitor C31, a chip U12 and a chip U13.

[0075] The gate of the MOS tube Q4 is connected to the cathode of the diode D10, the anode of the diode D10 is used to connect the PWM1 pin of the main control circuit 51, the source of the MOS tube Q4 is grounded, and the drain of the MOS tube Q4 is connected to the pin 1 of the chip U12 through the resistor R39.

[0076] The pin 1 of the chip U12 is grounded through the resistor R43, the capacitor C31 is connected in parallel across the resistor R43, the pin 2 of the chip U12 is grounded, the pin 3 of the chip U12 is connected to the cathode of the diode D6 through the resistor R40, the pin 3 of the chip U12 is also grounded through the resistor R42, the capacitor C29 is connected in parallel across the resistor R42, the pin 4 of the chip U12 is connected to the pin 8 of the chip U12 through the resistor R41, the pin 8 of the chip U12 is grounded through the capacitor C32, and the pin 4 of the chip U12 is also grounded through the capacitor C30.

[0077] The pin 7 of the chip U12 is used to connect the voltage terminal VCC-12V, the pin 7 of the chip U12 is also grounded through the capacitor C33, and the pin 5 of the chip U12 is grounded.

[0078] The pin 6 of the chip U12 is connected to the pin 1 of the chip U13 through the resistor R4, the pins 3 and 4 of the chip U13 are both grounded, the pin 6 of the chip U13 is used to connect the voltage terminal VCC-12V-2, the pin 6 of the chip U13 is also grounded through the capacitor C4, and the pin 5 of the chip U13 is connected to the base of the IGBT tube Q2 through the resistor R22 and the diode D3.

[0079] The chip U12 is a PWM chip that periodically sends a driving signal. The driving signal is transmitted to the chip U13 through the resistor R4, and the chip U13 drives the IGBT tube Q2.

[0080] The system control module comprises a main control circuit 51, and the main control circuit 51 is connected to the super capacitor charging and discharging switching module 20 and the super capacitor charging current limiting control module 30 respectively.

[0081] The main control circuit 51 comprises a main control chip U14, and preferably, the model of the main control chip U14 is STM32G431CBT6. The main control chip U14 has main control pins 1 to 48.

[0082] The main control pin 31 is a PWM1 pin of the main control circuit 51, the main control pin 32 is a PWM2 pin of the main control circuit 51, and the main control pin 11 is connected to the pin 7 of the chip U3 through the resistor R1. The main control chip U14 samples the level signal of the pin 7 of the chip U3 through the resistor R1, so as to obtain the current size information, and if the current is too large, a protection action is taken.

[0083] The main control pin 1 is connected to the first pin 1, the main control pin 16 is connected to the first pin 2, the first pin 17 is connected to the first pin 3, and the main control pin 23 is connected to the first pin 4.

[0084] The voice playing circuit 13 is connected to the main control circuit 51 and the loudspeaker 14 respectively. In the embodiment, the voice playing circuit 13 comprises a voice chip U40, the voice chip U40 has voice pins 1 to 8,

[0085] The main control pin 18 is connected to the voice pin 1, the main control pin 40 is connected to the voice pin 2, the voice pin 5 and the voice pin 7 are respectively connected to two ends of the loudspeaker 14, the voice pin 6 is used for connecting a 3V3 voltage end, and the voice pin 6 is also connected to the ground through the capacitor C40, and the voice pin 8 is connected to the ground.

[0086] The key circuit 15 is connected to the main control circuit 51. In the embodiment, the key circuit 15 comprises a first key SW1 and a second key SW2.

[0087] One end of the first key SW1 is connected to the main control pin 41, one end of the second key SW2 is connected to the main control pin 42, and the other ends of the first key SW1 and the second key SW2 are both connected to the ground.

[0088] The second plug interface 401 and the second fingerprint identification circuit 41 are both arranged on the second circuit board 40, and the main control circuit 51 is connected to the fingerprint identification circuit 41 through the first plug interface 101 and the second plug interface 401.

[0089] The first plug interface 101 has first pins 1 to 4, and correspondingly, the second plug interface 401 has second pins 1 to 4.

[0090] The fingerprint identification circuit 41 comprises a fingerprint identification chip U20, the fingerprint identification chip U20 has fingerprint identification pins 1 to 4, the fingerprint identification pin 1 is connected to the second pin 1, the fingerprint identification pin 2 is connected to the second pin 2, the fingerprint identification pin 3 is connected to the second pin 3, and the fingerprint identification pin 4 is connected to the second pin 4.

[0091] The first plug interface 101 and the second plug interface 401 are connected, the first pin 1 is connected with the second pin 1, the first pin 2 is connected with the second pin 2, the first pin 3 is connected with the second pin 3, and the first pin 4 is connected with the second pin 4.

[0092] The utility model discloses design main points at, it mainly is with fingerprint identification circuit and second plug interface are all separately arranged on second circuit board, one aspect, realizes safety protection to pumping unit, prevents pumping unit to give non-professional personnel operation, and then realizes the person in charge of special person special machine, another aspect, if the fingerprint function appears the problem, can directly remove second circuit board and maintain and replace, improve the maintenance convenience.

[0093] Secondly, through the voice playing circuit, the fingerprint identification condition can be directly understood, and the use convenience is improved.

[0094] The above is only the preferred embodiment of the utility model, and does not limit the technical range of the utility model, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belong to the range of the technical scheme of the utility model.

Claims

1. A safe super capacitor-based brake energy recycling device, comprising a DC bus, a super capacitor, a rectifier bridge BD1, a system control module, a super capacitor charging and discharging switching module, and a super capacitor charging current limiting control module; The DC bus connects the super capacitor through the rectifier bridge BD1, the super capacitor charging and discharging switching module and the super capacitor charging current limiting control module are connected to the super capacitor respectively, and the rectifier bridge BD1 connects the super capacitor charging and discharging switching module; The system control module comprises a main control circuit, and the main control circuit is connected to the super capacitor charging and discharging switching module and the super capacitor charging current limiting control module respectively; characterized in that It also includes a first circuit board, a second circuit board, a first plug-in interface, a second plug-in interface for plugging connection with the first plug-in interface, and a fingerprint recognition circuit for connection with the second plug-in interface; The first plug-in interface, the DC bus, the super capacitor, the rectifier bridge BD1, the system control module, the super capacitor charging and discharging switching module, and the super capacitor charging current limiting control module are all arranged on the first circuit board, the second plug-in interface and the second fingerprint recognition circuit are arranged on the second circuit board, and the main control circuit connects the fingerprint recognition circuit through the first plug-in interface and the second plug-in interface; The first plug-in interface has first pin 1 to first pin 4, and correspondingly, the second plug-in interface has second pin 1 to second pin 4; The main control circuit comprises a main control chip U14, the main control chip U14 has main control pin 1 to main control pin 48, main control pin 1 is connected to first pin 1, main control pin 16 is connected to first pin 2, first pin 17 is connected to first pin 3, and main control pin 23 is connected to first pin 4; The fingerprint recognition circuit comprises a fingerprint recognition chip U20, the fingerprint recognition chip U20 has fingerprint recognition pin 1 to fingerprint recognition pin 4, fingerprint recognition pin 1 is connected to second pin 1, fingerprint recognition pin 2 is connected to second pin 2, fingerprint recognition pin 3 is connected to second pin 3, and fingerprint recognition pin 4 is connected to second pin 4; The first plug-in interface and the second plug-in interface are connected, the first pin 1 is connected to the second pin 1, the first pin 2 is connected to the second pin 2, the first pin 3 is connected to the second pin 3, and the first pin 4 is connected to the second pin 4.

2. The safety type supercapacitor-based brake energy recycling device according to claim 1, characterized in that: It also includes a voice playing circuit and a loudspeaker arranged on the first circuit board, and the voice playing circuit is connected to the main control circuit and the loudspeaker respectively.

3. The safety type supercapacitor-based brake energy recycling device according to claim 2, characterized in that: The voice playing circuit comprises a voice chip U40, the voice chip U40 has voice pin 1 to voice pin 8, main control pin 18 is connected to voice pin 1, main control pin 40 is connected to voice pin 2, voice pin 5 and voice pin 7 are respectively connected to two ends of the loudspeaker, voice pin 6 is used for connecting a 3V3 voltage end, voice pin 6 is also grounded through a capacitor C40, and voice pin 8 is grounded.

4. The safety type supercapacitor-based brake energy recycling device according to claim 1, characterized in that: It also includes a key circuit arranged on the first circuit board, and the key circuit is connected to the main control circuit.

5. The safety type supercapacitor-based brake energy recycling device according to claim 4, characterized in that: The key circuit comprises a first key SW1 and a second key SW2; One end of the first button SW1 is connected to the master control pin 41, one end of the second button SW2 is connected to the master control pin 42, and the other ends of the first button SW1 and the second button SW2 are both grounded.

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