CN217848010U - Discharge equipment for preventing high potential of galvanic pile when vehicle is stopped suddenly - Google Patents

Discharge equipment for preventing high potential of galvanic pile when vehicle is stopped suddenly Download PDF

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Publication number
CN217848010U
CN217848010U CN202222219677.7U CN202222219677U CN217848010U CN 217848010 U CN217848010 U CN 217848010U CN 202222219677 U CN202222219677 U CN 202222219677U CN 217848010 U CN217848010 U CN 217848010U
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circuit
resistor
discharge
capacitance
output end
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王海平
赵兴旺
方川
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Beijing Sinohytec Co Ltd
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Beijing Sinohytec Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

The utility model provides a discharge apparatus of galvanic pile high potential when preventing vehicle scram belongs to fuel cell technical field, has solved the technique and can't be rapidly and effectively discharged problem when whole car scram. The device comprises a capacitance-resistance circuit, a selection control circuit, a discharge circuit and a controller. The positive pole of the galvanic pile is respectively connected with the input end of the capacitance resistance circuit and the input end of the discharge circuit, and the negative pole of the galvanic pile is respectively connected with the output end of the capacitance resistance circuit and the output end of the discharge circuit. The input end of the selection control circuit is connected with the output end of the controller, the selection control circuit is provided with two independent selection branches, the output end of the first branch is connected with the control end of the capacitance-resistance circuit, and the output end of the second branch is connected with the control end of the discharge circuit. And the controller is used for gating the first branch in the selection control circuit to maintain the high-potential output of the stack when the fuel cell is normally used, and gating the second branch in the selection control circuit to quickly discharge the stack when the vehicle is in sudden stop.

Description

Discharge equipment for preventing high potential of galvanic pile when vehicle is stopped suddenly
Technical Field
The utility model relates to a fuel cell technical field especially relates to a prevent discharge apparatus of pile high potential when vehicle scram.
Background
When the fuel cell system is applied to the whole vehicle, the high-low voltage power failure can be caused when the whole vehicle is in emergency stop, and at the moment, the galvanic pile is in a high potential, so that the service life of the galvanic pile is seriously damaged.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing analysis, the embodiments of the present invention provide a discharge device for preventing high voltage of a stack when a vehicle suddenly stops, so as to solve the problem that the prior art cannot rapidly and effectively discharge when the vehicle suddenly stops.
On the one hand, the embodiment of the utility model provides a prevent discharge apparatus of pile high potential when vehicle scram, including holding to hinder circuit, selection control circuit, discharge circuit to and be arranged in fuel cell when normally using control selection control circuit branch road one gate, branch road two gate in order to maintain the high potential output of pile and control selection control circuit branch road one gate in when vehicle scram, branch road two gate in order to the controller that discharges to the pile; wherein the content of the first and second substances,
the positive pole of the electric pile is respectively connected with the input end of the capacitance resistance circuit and the input end of the discharge circuit, and the negative pole of the electric pile is respectively connected with the output end of the capacitance resistance circuit and the output end of the discharge circuit;
the input end of the selection control circuit is connected with the output end of the controller, the selection control circuit is provided with two independent selection branches, the output end of the first branch is connected with the control end of the capacitance-resistance circuit, and the output end of the second branch is connected with the control end of the discharge circuit.
The beneficial effects of the above technical scheme are as follows: when the fuel cell is in a sudden stop, the discharging circuit designed in the direct current converter is adopted, electricity is taken from the side of the galvanic pile, and then the discharging branch is gated through the selection control circuit to discharge, so that the galvanic pile is prevented from being in a high potential and influencing the service life of the galvanic pile. Under the normal working condition of the fuel cell, the discharge circuit is switched off by selecting the control circuit, so that the power loss is avoided, the system efficiency is improved, and the capacitance-resistance circuit is started to ensure that the electric pile is at a high potential after the whole vehicle is normally electrified.
Based on the further improvement of the equipment, the capacitance-resistance circuit further comprises a resistor R1, a diode D1 and a capacitor C1 which are connected in sequence; wherein the content of the first and second substances,
one end of a resistor R1 is used as the input end of the capacitance-resistance circuit at the outer side of the capacitance-resistance circuit and is respectively connected with the anode of the electric pile and the input end of the discharge circuit; one end of the resistor C1 is used as the output end of the capacitance-resistance circuit and is respectively connected with the cathode of the pile and the output end of the discharge circuit;
in the capacitance-resistance circuit, the control end of the capacitance-resistance circuit is arranged at the connecting part between the diode D1 and the capacitor C1 and is connected with the output end of the first branch in the selection control circuit.
Further, the capacitance-resistance circuit further comprises a voltage stabilizing diode D2; wherein the content of the first and second substances,
the zener diode D2 is connected in parallel with the capacitor C1.
Further, the discharge circuit further comprises a resistor R6 and a discharge control element Q4 which are connected in sequence; wherein the content of the first and second substances,
on the outer side of the discharge circuit, one end of a resistor R6 is used as the input end of the discharge circuit and is respectively connected with the anode of the electric pile and the input end of the capacitance resistance circuit; the source electrode of the discharge control element Q4 is used as the output end of the discharge circuit and is respectively connected with the cathode of the galvanic pile and the output end of the capacitance resistance circuit;
in the discharge circuit, a control end of the discharge circuit is arranged at a connection part between the resistor R6 and the discharge control element Q4, and is connected with an output end of the second branch in the selection control circuit.
Further, the discharge control element Q4 is a solid-state relay, an N-type field effect transistor or an insulated gate bipolar transistor, or more than two N-type field effect transistors connected in parallel, or more than two insulated gate bipolar transistors connected in parallel.
Further, the selection control circuit further comprises a resistor R2, a resistor R4, a resistor R5, an N-type transistor Q1, an N-type transistor Q2 and a P-type transistor Q3; wherein, the first and the second end of the pipe are connected with each other,
the grid electrode of the N-type transistor Q1 is used as the input end of the selection control circuit and is connected with the output end of the controller, the drain electrode of the N-type transistor Q1 is respectively connected with one end of the resistor R2, the grid electrode of the N-type transistor Q2 and the grid electrode of the P-type transistor Q3, and the source electrode of the N-type transistor Q1 is respectively connected with the source electrode of the P-type transistor Q3, the source electrode of the discharge control element Q4 and the negative electrode of the pile;
the other end of the resistor R2 is used as an output end of a first branch in the selection control circuit and is respectively connected with a control end of the capacitance-resistance circuit and a drain electrode of the N-type transistor Q2; the source electrode of the N-type transistor Q2 is respectively connected with the drain electrode of the P-type transistor Q3 and one end of the resistor R4;
the other end of the resistor R4 is used as the output end of the second branch in the selection control circuit, is connected with the grid of the discharge control element Q4, and is connected with the cathode of the electric pile through a resistor R5.
Further, the selection control circuit further comprises a resistor R3; wherein, the first and the second end of the pipe are connected with each other,
the grid electrode of the N-type transistor Q1 is connected with the output end of the controller after passing through the resistor R3.
Further, the selection control circuit further comprises a light emitting diode D3; and also,
the N-type transistor Q1 is a photosensitive transistor, and the grid electrode of the photosensitive transistor is coupled and connected with the output end of the controller through a light-emitting diode D3 and a resistor R3 in sequence.
Further, the stack includes at least one of a proton exchange membrane fuel cell stack, a solid oxide fuel cell stack, an alkaline fuel cell stack, or a methanol fuel cell stack.
Further, the resistor R1, the resistor R2, the resistor R3, the resistor R4 and the resistor R5 are respectively one of a transistor resistor, a polysilicon resistor or an N-type well; and the number of the first and second electrodes,
the capacitor C1 adopts one of a metal oxide semiconductor capacitor, a metal oxide metal capacitor or a metal insulation layer metal capacitor.
Compared with the prior art, the utility model discloses can realize one of following beneficial effect at least:
1. when the fuel cell is normally charged at low voltage, the controller controls the conduction of the N-type transistor Q1 to enable the P-type transistor Q3 to be synchronously conducted, the discharge control element Q4 is closed to realize the starting of the capacitance-resistance circuit and the disconnection of the discharge loop, and the fuel cell charges the capacitor C1 through the resistor R1 and the diode D1. Because the discharge circuit is disconnected, the power loss of the system is reduced, and the efficiency of the system is improved.
2. When the vehicle is in a sudden stop, the controller controls the N-type transistor Q1 to be closed, so that the capacitor C1 conducts the N-type transistor Q2 through the resistor R2, the discharge control element Q4 is synchronously conducted, the fuel cell discharges through the resistor R6 and the discharge control element Q4, and after the discharge is completed, the discharge control element Q4 is automatically turned off. Under the condition of sudden stop of the fuel cell system, residual hydrogen of the galvanic pile is consumed through the discharge circuit, high potential of the galvanic pile is avoided, and the service life of the galvanic pile is prolonged.
The following detailed description is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. The summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 is a schematic diagram showing the composition of a discharge apparatus of a cell stack according to example 1;
fig. 2 shows a schematic circuit connection diagram of the electric pile discharge device of embodiment 2.
Reference numerals are as follows:
FC-stack; r1, R2, R3, R4, R5, R6, -resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6; c1-capacitance C1; d1-diode D1; d2-zener diode D2; d3-light emitting diode D3; Q1-N type transistor Q1;
a Q2-N transistor Q2; Q3-P transistor Q3; q4-discharge control element Q4.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same objects. Other explicit and implicit definitions are also possible below.
Example 1
The utility model discloses an embodiment discloses a discharge apparatus of galvanic pile high potential when preventing vehicle scram, as shown in FIG. 1, including the shell and locate the appearance in the shell and hinder circuit, selection control circuit, discharge circuit controller.
The positive pole of the pile is respectively connected with the input end of the capacitance resistance circuit and the input end of the discharge circuit, and the negative pole is respectively connected with the output end of the capacitance resistance circuit and the output end of the discharge circuit.
The input end of the selection control circuit is connected with the output end of the controller, the selection control circuit is provided with two independent selection branches, the output end of the first branch is connected with the control end of the capacitance-resistance circuit, and the output end of the second branch is connected with the control end of the discharge circuit.
And the controller is used for controlling the first branch in the selective control circuit to be switched on and the second branch in the selective control circuit to be switched off so as to maintain the high-potential output of the stack when the fuel cell is normally used, and controlling the first branch in the selective control circuit to be switched off and the second branch to be switched on so as to quickly discharge the stack when the vehicle is in sudden stop.
Specifically, a capacitance-resistance circuit, i.e., a circuit in which a resistor R1 is connected in series with a capacitor C1. Besides the form described in embodiment 2, the circuit in the prior patent CN202011330774.2 can also be used. The capacitor C1 is used for charging, and the preset charging time is determined by the time constants of the resistor R1 and the capacitor C1. The time required for rising to the high-state level is only microsecond (mus) grade, so as to ensure the high potential after the vehicle is normally electrified.
And the selection control circuit is a circuit for gating the pile-capacitance resistance circuit connecting branch or the pile-discharge circuit connecting branch. Besides the form described in embodiment 2, the circuit in the prior patents cn201710711638.X, CN202110942310.5, etc. can also be used.
And the discharge circuit is a circuit for rapidly discharging the electric pile. The circuit form can adopt the circuits in the prior patents CN201520041481.0, CN201310390870.X and the like in addition to the form described in the embodiment 2.
When the fuel cell is in normal working condition, the control circuit is selected to gate the capacitance-resistance circuit, and the capacitor in the capacitance-resistance circuit is rapidly charged, so that the high potential after the whole vehicle is normally powered on is ensured, and the discharge circuit is disconnected, thereby reducing the power loss of the system and improving the system efficiency; under the condition that the fuel cell is shut down due to sudden stop of the vehicle, residual hydrogen of the galvanic pile is consumed through the gating discharge circuit, high potential of the galvanic pile is avoided, and the service life of the galvanic pile is prolonged.
Compared with the prior art, the galvanic pile discharge equipment that this embodiment provided can adopt the discharge circuit of design among the direct current converter when fuel cell scrams, through getting the electricity from the galvanic pile side, and then discharges through selecting control circuit gating discharge branch, avoids the galvanic pile to be in the high potential, influences the galvanic pile life-span. Under the normal working condition of the fuel cell, the discharge circuit is switched off by selecting the control circuit, so that the power loss is avoided, the system efficiency is improved, and the capacitance-resistance circuit is started to ensure that the electric pile is at a high potential after the whole vehicle is normally electrified.
Example 2
The improvement is made on the basis of embodiment 1, and the capacitance-resistance circuit further includes a resistor R1, a diode D1, and a capacitor C1, which are connected in sequence, as shown in fig. 2, but not limited to the range shown in fig. 2. The capacitor C1 can be charged and discharged.
One end of a resistor R1 is used as an input end of the capacitance-resistance circuit at the outer side of the capacitance-resistance circuit and is respectively connected with the anode of the electric pile and the input end of the discharge circuit; one end of the resistor C1 is used as the output end of the capacitance-resistance circuit and is respectively connected with the cathode of the pile and the output end of the discharge circuit.
In the capacitance-resistance circuit, a control end of the capacitance-resistance circuit is configured at a connection part between the diode D1 and the capacitor C1 and is connected with an output end of a first branch in the selection control circuit.
Preferably, the capacitance-resistance circuit further comprises a voltage stabilizing diode D2. The zener diode D2 is connected in parallel with the capacitor C1 to prevent overvoltage protection from being provided to the capacitor C1.
Preferably, the discharge circuit further includes a resistor R6 and a discharge control element Q4 connected in sequence. The discharge control element Q4 is an N-type transistor (including one of a field effect transistor MOSFET and an insulated gate bipolar transistor IGBT), a solid-state relay, or a combination of the two.
In the prior art, a discharge circuit adopts a discharge mode of a single resistor, and the discharge circuit is not controlled and has high power consumption. Compared with the prior art, the discharging circuit of the embodiment automatically controls discharging through the discharging control element Q4, and under the working condition that discharging is not needed, the discharging circuit is closed, so that power consumption can be reduced, and efficiency is improved. The resistor R6 can limit the current that discharges, in particular in the event of a switching failure, and damage to other components is avoided.
One end of a resistor R6 is used as the input end of the discharge circuit at the outer side of the discharge circuit and is respectively connected with the anode of the galvanic pile and the input end of the capacitance resistance circuit; and the source electrode of the discharge control element Q4 is used as the output end of the discharge circuit and is respectively connected with the cathode of the galvanic pile and the output end of the capacitance resistance circuit.
In the discharge circuit, a control end of the discharge circuit is arranged at a connection part between the resistor R6 and the discharge control element Q4, and is connected with an output end of the second branch in the selection control circuit.
Preferably, the discharge control element Q4 is a solid-state relay, an N-type transistor, or two or more N-type transistors connected in parallel. The N-type MOSFET transistor has high input resistance (10) 8 ～10 9 Omega), small noise, low power consumption, large dynamic range, easy integration, no secondary breakdown phenomenon, wide safe working area and the like, and can prevent the resistor R6 from being overheated. A plurality of N-type MOSFET transistors may be used in parallel.
Preferably, the selection control circuit further comprises a resistor R2, a resistor R4, a resistor R5, an N-type transistor Q1, an N-type transistor Q2 and a P-type transistor Q3.
The gate of the N-type transistor Q1 is used as the input terminal of the selection control circuit, and is connected to the output terminal of the controller, the drain thereof is connected to one end of the resistor R2, the gate of the N-type transistor Q2, and the gate of the P-type transistor Q3, respectively, and the source thereof is connected to the source of the P-type transistor Q3, the source of the discharge control element Q4, and the cathode of the cell stack, respectively.
The other end of the resistor R2 is used as the output end of a first branch in the selection control circuit and is respectively connected with the control end of the capacitance-resistance circuit and the drain electrode of the N-type transistor Q2; the source of the N-type transistor Q2 is connected to the drain of the P-type transistor Q3 and one end of the resistor R4, respectively.
The other end of the resistor R4 is used as the output end of the second branch in the selection control circuit, is connected with the grid of the discharge control element Q4, and is connected with the cathode of the pile through a resistor R5. The resistors R4 and R5 form a voltage division circuit to prevent the discharge control element Q4 from being damaged by overvoltage.
Through the circuit structure, the capacitor C1 can automatically supply power to the second branch of the selective control circuit in a gating mode when the vehicle is in sudden stop, and power supply of the controller is not needed.
Preferably, the selection control circuit further includes a resistor R3. The grid electrode of the N-type transistor Q1 is connected with the output end of the controller after passing through the resistor R3.
Preferably, the selection control circuit further includes a light emitting diode D3. And the N-type transistor Q1 is a photosensitive transistor, and the grid electrode of the N-type transistor Q1 is coupled and connected with the output end of the controller through a light-emitting diode D3 and a resistor R3 in sequence. The optical coupling mode is adopted, so that the input and the output of the selection control circuit are isolated from each other, and the electric signal transmission has the characteristics of unidirectionality and the like, so that the selection control circuit has good electric insulation capacity and anti-interference capacity, has strong common mode rejection capacity, and prevents false triggering.
Preferably, the stack comprises at least one of a proton exchange membrane fuel cell stack, a solid oxide fuel cell stack, an alkaline fuel cell stack, or a methanol fuel cell stack. Parallel or series modes may be used, as will be appreciated by those skilled in the art.
Preferably, the resistor R1, the resistor R2, the resistor R3, the resistor R4, and the resistor R5 are respectively one of a transistor resistor, a polysilicon resistor, and an N-type well resistor. The capacitor C1 is one of a metal oxide semiconductor capacitor, a metal oxide metal capacitor, or a metal insulation layer metal capacitor.
Compared with the prior art, the discharge device provided by the embodiment has the following beneficial effects:
1. when the fuel cell is normally powered up and powered down, the controller controls the conduction of the N-type transistor Q1 to enable the P-type transistor Q3 to be synchronously conducted, the discharge control element Q4 is closed to realize the starting of the capacitance-resistance circuit and the disconnection of the discharge loop, and the fuel cell charges the capacitor C1 through the resistor R1 and the diode D1. The discharge circuit is disconnected, so that the power loss of the system is reduced, and the efficiency of the system is improved.
2. When the vehicle is in a sudden stop, the controller controls the N-type transistor Q1 to be closed, so that the capacitor C1 conducts the N-type transistor Q2 through the resistor R2, the discharge control element Q4 is synchronously conducted, the fuel cell discharges through the resistor R6 and the discharge control element Q4, and after the discharge is completed, the discharge control element Q4 is automatically turned off. Under the condition of sudden stop of the fuel cell system, residual hydrogen of the galvanic pile is consumed through the discharge circuit, high potential of the galvanic pile is avoided, and the service life of the galvanic pile is prolonged.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or improvements over the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The discharge equipment for preventing the high potential of the galvanic pile when the vehicle is in sudden stop is characterized by comprising a capacitance-resistance circuit, a selection control circuit, a discharge circuit and a controller, wherein the controller is used for controlling the gating of a branch circuit I and the gating of a branch circuit II in the selection control circuit to maintain the high potential output of the galvanic pile when a fuel cell is normally used and controlling the gating of the branch circuit I and the gating of the branch circuit II in the selection control circuit to discharge the galvanic pile when the vehicle is in sudden stop; wherein, the first and the second end of the pipe are connected with each other,
the positive pole of the pile is respectively connected with the input end of the capacitance resistance circuit and the input end of the discharge circuit, and the negative pole of the pile is respectively connected with the output end of the capacitance resistance circuit and the output end of the discharge circuit;
the input end of the selection control circuit is connected with the output end of the controller, the selection control circuit is provided with two independent selection branches, the output end of the first branch is connected with the control end of the capacitance-resistance circuit, and the output end of the second branch is connected with the control end of the discharge circuit.
2. The discharge device for preventing the high potential of the galvanic pile when the vehicle is in the scram according to claim 1, wherein the capacitance-resistance circuit further comprises a resistor R1, a diode D1 and a capacitor C1 which are connected in sequence; wherein, the first and the second end of the pipe are connected with each other,
one end of a resistor R1 is used as the input end of the capacitance-resistance circuit at the outer side of the capacitance-resistance circuit and is respectively connected with the anode of the electric pile and the input end of the discharge circuit; one end of the resistor C1 is used as the output end of the capacitance-resistance circuit and is respectively connected with the cathode of the pile and the output end of the discharge circuit;
in the capacitance-resistance circuit, the control end of the capacitance-resistance circuit is arranged at the connecting part between the diode D1 and the capacitor C1 and is connected with the output end of the first branch in the selection control circuit.
3. The electric discharge device for preventing high potential of electric pile when vehicle is in scram according to claim 2, characterized in that the capacitance-resistance circuit further comprises a voltage-stabilizing diode D2; wherein the content of the first and second substances,
the zener diode D2 is connected in parallel with the capacitor C1.
4. The apparatus according to claim 3, wherein the discharge circuit further comprises a resistor R6, a discharge control element Q4; wherein the content of the first and second substances,
on the outer side of the discharge circuit, one end of a resistor R6 is used as the input end of the discharge circuit and is respectively connected with the anode of the electric pile and the input end of the capacitance resistance circuit; the source electrode of the discharge control element Q4 is used as the output end of the discharge circuit and is respectively connected with the cathode of the galvanic pile and the output end of the capacitance resistance circuit;
in the discharge circuit, a control end of the discharge circuit is arranged at a connection part between the resistor R6 and the discharge control element Q4, and is connected with an output end of the second branch in the selection control circuit.
5. The device for preventing high-potential discharge of the galvanic pile in sudden vehicle stop according to claim 4, wherein the discharge control element Q4 is a solid-state relay, an N-type field effect transistor or an insulated gate bipolar transistor, or more than two N-type field effect transistors connected in parallel, or more than two insulated gate bipolar transistors connected in parallel.
6. The device for preventing high potential of the electric pile when a vehicle is in scram according to claim 4 or 5, characterized in that the selection control circuit further comprises a resistor R2, a resistor R4, a resistor R5, an N-type transistor Q1, an N-type transistor Q2 and a P-type transistor Q3; wherein the content of the first and second substances,
the grid electrode of the N-type transistor Q1 is used as the input end of the selection control circuit and is connected with the output end of the controller, the drain electrode of the N-type transistor Q1 is respectively connected with one end of the resistor R2, the grid electrode of the N-type transistor Q2 and the grid electrode of the P-type transistor Q3, and the source electrode of the N-type transistor Q1 is respectively connected with the source electrode of the P-type transistor Q3, the source electrode of the discharge control element Q4 and the negative electrode of the pile;
the other end of the resistor R2 is used as an output end of a first branch in the selection control circuit and is respectively connected with a control end of the capacitance-resistance circuit and a drain electrode of the N-type transistor Q2; the source electrode of the N-type transistor Q2 is respectively connected with the drain electrode of the P-type transistor Q3 and one end of the resistor R4;
the other end of the resistor R4 is used as the output end of the second branch in the selection control circuit, is connected with the grid of the discharge control element Q4, and is connected with the cathode of the pile through a resistor R5.
7. The apparatus for preventing high potential discharge of a pile when a vehicle is scrammed according to claim 6, wherein said selection control circuit further comprises a resistor R3; wherein the content of the first and second substances,
the grid electrode of the N-type transistor Q1 is connected with the output end of the controller after passing through the resistor R3.
8. The apparatus for preventing high potential discharge of a pile when a vehicle is in an emergency stop according to claim 7, wherein said selection control circuit further comprises a light emitting diode D3; and also,
the N-type transistor Q1 is a photosensitive transistor, and the grid electrode of the photosensitive transistor is coupled and connected with the output end of the controller through a light-emitting diode D3 and a resistor R3 in sequence.
9. The apparatus for preventing high-potential discharge of a stack during vehicle sudden stop according to any one of claims 1, 2, 3, 4, 5, 7 and 8, wherein the stack comprises at least one of a proton exchange membrane fuel cell stack, a solid oxide fuel cell stack, an alkaline fuel cell stack or a methanol fuel cell stack.
10. The discharge device for preventing high potential of the pile when the vehicle is in sudden stop according to claim 7 or 8, wherein the resistor R1, the resistor R2, the resistor R3, the resistor R4 and the resistor R5 are respectively one of a transistor resistor, a polysilicon resistor or an N-type well resistor; and the number of the first and second electrodes,
the capacitor C1 adopts one of a metal oxide semiconductor capacitor, a metal oxide metal capacitor or a metal insulation layer metal capacitor.
CN202222219677.7U 2022-08-23 2022-08-23 Discharge equipment for preventing high potential of galvanic pile when vehicle is stopped suddenly Active CN217848010U (en)

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Application Number Priority Date Filing Date Title
CN202222219677.7U CN217848010U (en) 2022-08-23 2022-08-23 Discharge equipment for preventing high potential of galvanic pile when vehicle is stopped suddenly

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Application Number Priority Date Filing Date Title
CN202222219677.7U CN217848010U (en) 2022-08-23 2022-08-23 Discharge equipment for preventing high potential of galvanic pile when vehicle is stopped suddenly

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