CN111679220A - Detection circuit and detection method for overcurrent and short circuit of high-voltage power supply - Google Patents
Detection circuit and detection method for overcurrent and short circuit of high-voltage power supply Download PDFInfo
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- CN111679220A CN111679220A CN202010669700.5A CN202010669700A CN111679220A CN 111679220 A CN111679220 A CN 111679220A CN 202010669700 A CN202010669700 A CN 202010669700A CN 111679220 A CN111679220 A CN 111679220A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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Abstract
The invention discloses a detection circuit and a detection method for overcurrent and short circuit of a high-voltage power supply, which are applied to the high-voltage power supply, wherein the detection circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a triode Q1; the detection circuit comprises an overcurrent signal generation and conversion circuit, wherein the overcurrent signal generation and conversion circuit mainly comprises a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3 and a triode Q1. The invention realizes quick response to output overcurrent or short-circuit state, thereby informing the main circuit to carry out overcurrent or short-circuit protection, and the second resistor R2 and the first capacitor C1 can protect the circuit in a safe working area during short circuit, simultaneously limit the peak value of short-circuit current and improve the safety of high-voltage output of the high-voltage power supply.
Description
Technical Field
The invention belongs to the field of electronic circuits, and particularly relates to a detection circuit and a detection method for overcurrent and short circuit of a high-voltage power supply.
Background
The high voltage power supply generally refers to a power supply with an output voltage of more than five kilovolts, and the output voltage of the high voltage power supply can reach tens of thousands of volts, even hundreds of thousands of volts or more. The traditional high-power high-voltage power supply is generally forbidden to be short-circuited, and for a semiconductor power device, when the overload time exceeds dozens of microseconds, the device can be damaged, the traditional protection method for the overload or short circuit of the high-power high-voltage power supply cuts off an input power frequency power supply by disconnecting or switching off a silicon controlled rectifier through a contact of a contactor, and the time for cutting off the power frequency power supply is between ten milliseconds and dozens of milliseconds, so that the protection method has no effective protection effect on a high-power semiconductor device inside the high-power high-voltage power supply or a high-power conductor device inside load equipment. Secondly, the traditional low-power high-voltage power supply usually adopts a current-limiting current loop method to perform current-limiting protection, and the maximum load output is restrained by controlling the input current, so that the output overcurrent protection is achieved. In summary, safety and reliability are important technical indicators in high voltage power supply products, and not only should the reliable operation and safety of the power supply itself be ensured, but also the safety of the load and the operator should be ensured, especially small low power high voltage power supply products, which require personal safety under the condition of accidental touch, and therefore, a protection measure capable of being fast and effective is needed to protect the power supply equipment or the user equipment.
Disclosure of Invention
The present invention is directed to a circuit and a method for detecting an over-current and a short circuit in a high voltage power supply, so as to solve the above technical problems in the related art.
In order to solve the above technical problem, the present invention provides a detection circuit for detecting an overcurrent and a short circuit of a high voltage power supply, which is applied to the high voltage power supply, and the detection circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a triode Q1; the detection circuit comprises an overcurrent signal generation and conversion circuit, wherein the overcurrent signal generation and conversion circuit mainly comprises a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3 and a triode Q1; a first end of the first resistor R1 is connected with a first end of the first capacitor C1, a second end of the first resistor R1 is connected with a second end of the first capacitor C1, and the first end and the second end are commonly grounded to HVGND; a first end of the second resistor R2 is connected with a first end of a high-voltage capacitor CHV of the high-voltage power supply, a second end of the high-voltage capacitor CHV of the high-voltage power supply is connected with an output end of the high-voltage power supply, and a second end of the second resistor R2 is connected with a first end of the first resistor R1; the overcurrent signal generation and conversion circuit is connected with the first resistor R1.
Preferably, a first end of a third resistor R3 of the over-current signal generating and converting circuit is respectively connected to a first end of a second capacitor C2 and a base of a transistor Q1, a second end of the third resistor R3 is connected to a second end of a second capacitor C2, a first end of a fourth resistor R4 is respectively connected to a first end of a third capacitor C3 and a collector of the transistor Q1, and a second end of the fourth resistor R4 is connected to a second end of a third capacitor C3 and is commonly connected to the supply voltage VCC.
Preferably, when the output terminal HVOUT of the high voltage power supply outputs a positive voltage, an emitter of the transistor Q1 of the over current signal generating and converting circuit is connected to a first terminal of the first resistor R1, and a second terminal of the third resistor R3 is connected to a second terminal of the first resistor R1.
Preferably, when the output terminal HVOUT of the high voltage power supply outputs a negative voltage, the second terminal of the third resistor R3 of the over current signal generating and converting circuit is connected to the first terminal of the first resistor R1, and the emitter of the transistor Q1 is grounded to HVGND.
Preferably, the first resistor R1 is a current detection resistor, and the magnitude of the current detection resistor determines a current threshold value of overcurrent protection; the first capacitor C1 is a detection filter capacitor and is used for eliminating the interference of stray current and suppressing transient voltage during short circuit; the second resistor R2 is a short-circuit current-limiting resistor, and is used for suppressing transient peak current during short circuit and reducing device stress and transient interference; the third resistor R3 is a current-limiting resistor at the base of the triode Q1, the fourth resistor R4 is a pull-up resistor at the collector of the triode Q1, the second capacitor C2 is a filter capacitor at the base of the triode Q1, and the third capacitor C3 is a filter capacitor at the collector of the triode Q1.
Preferably, an overcurrent short-circuit detection signal/OC is output from a first terminal of the fourth resistor R4 of the overcurrent signal generation and conversion circuit for indicating an overcurrent state of the high-voltage power supply.
Preferably, the transistor Q1 is an NPN transistor.
In order to solve the technical problem, the invention also provides an overcurrent and short circuit detection method applied to a high-voltage power supply, which is realized by using the detection circuit and comprises the following steps: when the high-voltage power supply output terminal HVOUT outputs a positive voltage, a load current output by the high-voltage power supply in a steady state flows through the first resistor R1, the level J1 of the first terminal of the first resistor R1 is negative, when the load current becomes large, the absolute value V (0, J1) of the level of the J1 becomes large, and when the voltage V (0, J1) is greater than the voltage drop required for the conduction of the transistor Q1, the overcurrent short-circuit detection signal/OC signal is output from the first terminal of the fourth resistor R4 of the overcurrent signal generation switching circuit to change from a high level to a low level.
In order to solve the technical problem, the invention also provides an overcurrent and short circuit detection method applied to a high-voltage power supply, which is realized by using the detection circuit and comprises the following steps: when the high-voltage power supply output terminal HVOUT outputs a negative voltage, a load current output by the high-voltage power supply in a steady state flows through the first resistor R1, the level J1 of the first terminal of the first resistor R1 is positive, the absolute value V (J1,0) of the level of the J1 becomes large when the load current becomes large, and when the voltage V (J1,0) is greater than the voltage drop required for the conduction of the transistor Q1, the overcurrent short-circuit detection signal/OC signal is output from the first terminal of the fourth resistor R4 of the overcurrent signal generation and conversion circuit to change from a high level to a low level.
In order to solve the technical problem, the invention also provides an overcurrent and short circuit detection method applied to a high-voltage power supply, which is realized by using the detection circuit and comprises the following steps: if the output is short-circuited, HVOUT and HVGND are short-circuited, the voltage of a high-voltage capacitor CHV is directly connected to a first resistor R1 and a second resistor R2, the first resistor R1 is connected in parallel with a first capacitor C1, the voltage is not transient, the instantaneous voltage is dropped on the second resistor R2, the level J1 at the first end of the first resistor R1 is not too low to damage the device, the instantaneous current magnitude Ishort of the short circuit is equal to the ratio of the instantaneous voltage of the high-voltage capacitor CHV to the resistance value of the second resistor R2, and the instantaneous current magnitude Ishort of the short circuit is limited by the second resistor R2.
The invention has the beneficial effects that: the detection circuit and the detection method can quickly respond to and output an overcurrent or short-circuit state so as to inform a main circuit of overcurrent or short-circuit protection, the second resistor R2 and the first capacitor C1 can protect the circuit in a safe working area during short circuit, and meanwhile, the peak value of short-circuit current is limited, and the safety of high-voltage output of a high-voltage power supply is improved.
Drawings
FIG. 1 is a circuit without overcurrent short detection;
FIG. 2 is a circuit with over-current short detection;
FIG. 3 is a circuit for positive voltage output;
FIG. 4 is a circuit for negative voltage output;
FIG. 5 is a positive voltage output short circuit;
fig. 6 is a negative voltage output short circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the high voltage power supply does not have an overcurrent short detection circuit. If the high-voltage power supply is not provided with the overcurrent short-circuit detection circuit, the safety and the reliability of the high-voltage power supply cannot be guaranteed, and the safety of a load and an operator cannot be guaranteed.
As shown in fig. 2, an overcurrent short-circuit detection circuit is added in the high-voltage power supply, and the overcurrent short-circuit detection circuit is connected in series between the output high-voltage capacitor CHV and the output reference ground, and when overcurrent and short-circuit occur, the level change of the overcurrent short-circuit detection signal/OC signal is triggered, so that the main circuit is informed to perform overcurrent and short-circuit protection.
Fig. 3 is a circuit for outputting positive voltage, as shown in fig. 3, a circuit for detecting overcurrent and short circuit of a high voltage power supply, which is applied to the high voltage power supply, and includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a transistor Q1; the detection circuit comprises an overcurrent signal generation and conversion circuit, wherein the overcurrent signal generation and conversion circuit mainly comprises a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3 and a triode Q1; a first end of the first resistor R1 is connected with a first end of the first capacitor C1, a second end of the first resistor R1 is connected with a second end of the first capacitor C1, and the first end and the second end are commonly grounded to HVGND; a first end of the second resistor R2 is connected with a first end of a high-voltage capacitor CHV of the high-voltage power supply, a second end of the high-voltage capacitor CHV of the high-voltage power supply is connected with an output end of the high-voltage power supply, and a second end of the second resistor R2 is connected with a first end of the first resistor R1; the overcurrent signal generation and conversion circuit is connected with the first resistor R1; a first end of a third resistor R3 of the over-current signal generation and conversion circuit is respectively connected with a first end of a second capacitor C2 and a base electrode of a triode Q1, a second end of the third resistor R3 is connected with a second end of a second capacitor C2, a first end of a fourth resistor R4 is respectively connected with a first end of a third capacitor C3 and a collector electrode of the triode Q1, and a second end of the fourth resistor R4 is connected with a second end of a third capacitor C3 and is commonly connected with a supply voltage VCC; when the output terminal HVOUT of the high voltage power supply outputs a positive voltage, the emitter of the transistor Q1 of the over current signal generating and converting circuit is connected to the first terminal of the first resistor R1, and the second terminal of the third resistor R3 is connected to the second terminal of the first resistor R1.
The method for detecting the overcurrent and short circuit of the high-voltage power supply by using the detection circuit comprises the following steps: when the high-voltage power supply output terminal HVOUT outputs a positive voltage, a load current output by the high-voltage power supply in a steady state flows through the first resistor R1, the level J1 of the first terminal of the first resistor R1 is negative, when the load current becomes large, the absolute value V (0, J1) of the level of the J1 becomes large, and when the voltage V (0, J1) is greater than the voltage drop required for the conduction of the transistor Q1, the overcurrent short-circuit detection signal/OC signal is output from the first terminal of the fourth resistor R4 of the overcurrent signal generation switching circuit to change from a high level to a low level.
Fig. 4 is a circuit for outputting negative voltage, and as shown in fig. 4, a circuit for detecting overcurrent and short circuit of a high voltage power supply, which is applied to the high voltage power supply, includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a transistor Q1; the detection circuit comprises an overcurrent signal generation and conversion circuit, wherein the overcurrent signal generation and conversion circuit mainly comprises a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3 and a triode Q1; a first end of the first resistor R1 is connected with a first end of the first capacitor C1, a second end of the first resistor R1 is connected with a second end of the first capacitor C1, and the first end and the second end are commonly grounded to HVGND; a first end of the second resistor R2 is connected with a first end of a high-voltage capacitor CHV of the high-voltage power supply, a second end of the high-voltage capacitor CHV of the high-voltage power supply is connected with an output end of the high-voltage power supply, and a second end of the second resistor R2 is connected with a first end of the first resistor R1; the overcurrent signal generation and conversion circuit is connected with the first resistor R1; a first end of a third resistor R3 of the over-current signal generation and conversion circuit is respectively connected with a first end of a second capacitor C2 and a base electrode of a triode Q1, a second end of the third resistor R3 is connected with a second end of a second capacitor C2, a first end of a fourth resistor R4 is respectively connected with a first end of a third capacitor C3 and a collector electrode of the triode Q1, and a second end of the fourth resistor R4 is connected with a second end of a third capacitor C3 and is commonly connected with a supply voltage VCC; when the output terminal HVOUT of the high voltage power supply outputs a negative voltage, the second terminal of the third resistor R3 of the over-current signal generating and converting circuit is connected to the first terminal of the first resistor R1, and the emitter of the transistor Q1 is grounded to HVGND.
The method for detecting the overcurrent and short circuit of the high-voltage power supply by using the detection circuit comprises the following steps: when the high-voltage power supply output terminal HVOUT outputs a negative voltage, a load current output by the high-voltage power supply in a steady state flows through the first resistor R1, the level J1 of the first terminal of the first resistor R1 is positive, the absolute value V (J1,0) of the level of the J1 becomes large when the load current becomes large, and when the voltage V (J1,0) is greater than the voltage drop required for the conduction of the transistor Q1, the overcurrent short-circuit detection signal/OC signal is output from the first terminal of the fourth resistor R4 of the overcurrent signal generation and conversion circuit to change from a high level to a low level.
In fig. 2-6, R1 is a current detection resistor, the size of which determines the current threshold of the overcurrent protection; c1 is a detection filter capacitor which is used for eliminating the interference of stray current and the suppression of transient voltage during short circuit; r2 is a short-circuit current-limiting resistor which is used for restraining transient peak current during short circuit and reducing stress and transient interference of the device; r3 is triode Q1 base current-limiting resistor, R4 is triode Q1 collector pull-up resistor, C2 is triode Q1 base filter capacitor, and C3 is triode Q1 collector filter capacitor; q1 is NPN triode; /OC is an overcurrent short-circuit detection signal; the LOAD is an output external LOAD.
Fig. 5 and 6 show a positive voltage output short-circuit and a negative voltage output short-circuit, respectively. As shown in fig. 5 and 6, the method for detecting the overcurrent and short circuit of the high-voltage power supply by using the detection circuit includes the following steps: when the output is short-circuited, HVOUT and HVGND are short-circuited, the voltage on the CHV high-voltage capacitor is directly connected to R1 and R2, and the voltage cannot be transient because the R1 is connected with C1 in parallel, so that the instantaneous voltage is dropped on R2, and the voltage drop of the node J1 cannot be too low to damage the device. The magnitude of the short-circuit instantaneous current Ishort ═ V (CHV)/R2, wherein V (CHV) represents the instantaneous voltage of the high-voltage capacitor CHV, and the existence of R2 can limit Ishort, and the negative effects of sparking discharge and large di/dt caused by overlarge short-circuit current are avoided.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a detection circuitry that high voltage power supply overflows, short circuit, is applied to high voltage power supply which characterized in that: the detection circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a triode Q1; the detection circuit comprises an overcurrent signal generation and conversion circuit, wherein the overcurrent signal generation and conversion circuit mainly comprises a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3 and a triode Q1; a first end of the first resistor R1 is connected with a first end of the first capacitor C1, a second end of the first resistor R1 is connected with a second end of the first capacitor C1, and the first end and the second end are commonly grounded to HVGND; a first end of the second resistor R2 is connected with a first end of a high-voltage capacitor CHV of the high-voltage power supply, a second end of the high-voltage capacitor CHV of the high-voltage power supply is connected with an output end of the high-voltage power supply, and a second end of the second resistor R2 is connected with a first end of the first resistor R1; the overcurrent signal generation and conversion circuit is connected with the first resistor R1.
2. The circuit for detecting overcurrent and short circuit of a high-voltage power supply according to claim 1, wherein: the first end of a third resistor R3 of the over-current signal generation and conversion circuit is respectively connected with the first end of a second capacitor C2 and the base electrode of a triode Q1, the second end of the third resistor R3 is connected with the second end of a second capacitor C2, the first end of a fourth resistor R4 is respectively connected with the first end of a third capacitor C3 and the collector electrode of the triode Q1, and the second end of the fourth resistor R4 is connected with the second end of a third capacitor C3 and is commonly connected with a supply voltage VCC.
3. The circuit for detecting overcurrent and short circuit of a high-voltage power supply according to claim 2, wherein: when the output terminal HVOUT of the high voltage power supply outputs a positive voltage, the emitter of the transistor Q1 of the over current signal generating and converting circuit is connected to the first terminal of the first resistor R1, and the second terminal of the third resistor R3 is connected to the second terminal of the first resistor R1.
4. The circuit for detecting overcurrent and short circuit of a high-voltage power supply according to claim 2, wherein: when the output terminal HVOUT of the high voltage power supply outputs a negative voltage, the second terminal of the third resistor R3 of the over-current signal generating and converting circuit is connected to the first terminal of the first resistor R1, and the emitter of the transistor Q1 is grounded to HVGND.
5. The circuit for detecting the overcurrent and short circuit of the high-voltage power supply according to any one of claims 1 to 4, wherein: the first resistor R1 is a current detection resistor, and the size of the current detection resistor determines the current threshold value of overcurrent protection; the first capacitor C1 is a detection filter capacitor and is used for eliminating the interference of stray current and suppressing transient voltage during short circuit; the second resistor R2 is a short-circuit current-limiting resistor, and is used for suppressing transient peak current during short circuit and reducing device stress and transient interference; the third resistor R3 is a current-limiting resistor at the base of the triode Q1, the fourth resistor R4 is a pull-up resistor at the collector of the triode Q1, the second capacitor C2 is a filter capacitor at the base of the triode Q1, and the third capacitor C3 is a filter capacitor at the collector of the triode Q1.
6. The circuit for detecting the overcurrent and short circuit of the high-voltage power supply according to any one of claims 1 to 5, wherein: an overcurrent short-circuit detection signal/OC is output from a first end of the fourth resistor R4 of the overcurrent signal generation and conversion circuit for indicating overcurrent and short-circuit states of the high-voltage power supply.
7. The circuit for detecting overcurrent and short circuit of a high-voltage power supply according to claim 1, wherein: the transistor Q1 is an NPN transistor.
8. A method for detecting overcurrent and short circuit of a high-voltage power supply by using the detection circuit of any one of claims 1 to 7, wherein the method comprises the following steps: the method comprises the following steps: when the high-voltage power supply output terminal HVOUT outputs a positive voltage, a load current output by the high-voltage power supply in a steady state flows through the first resistor R1, the level J1 of the first terminal of the first resistor R1 is negative, when the load current becomes large, the absolute value V (0, J1) of the level of the J1 becomes large, and when the voltage V (0, J1) is greater than the voltage drop required for the conduction of the transistor Q1, the overcurrent short-circuit detection signal/OC signal is output from the first terminal of the fourth resistor R4 of the overcurrent signal generation switching circuit to change from a high level to a low level.
9. A method for detecting overcurrent and short circuit of a high-voltage power supply by using the detection circuit of any one of claims 1 to 7, wherein the method comprises the following steps: the method comprises the following steps: when the high-voltage power supply output terminal HVOUT outputs a negative voltage, a load current output by the high-voltage power supply in a steady state flows through the first resistor R1, the level J1 of the first terminal of the first resistor R1 is positive, the absolute value V (J1,0) of the level of the J1 becomes large when the load current becomes large, and when the voltage V (J1,0) is greater than the voltage drop required for the conduction of the transistor Q1, the overcurrent short-circuit detection signal/OC signal is output from the first terminal of the fourth resistor R4 of the overcurrent signal generation and conversion circuit to change from a high level to a low level.
10. A method for detecting overcurrent and short circuit of a high-voltage power supply by using the detection circuit of any one of claims 1 to 7, wherein the method comprises the following steps: the method comprises the following steps: if the output is short-circuited, HVOUT and HVGND are short-circuited, the voltage of a high-voltage capacitor CHV is directly connected to a first resistor R1 and a second resistor R2, the first resistor R1 is connected in parallel with a first capacitor C1, the voltage is not transient, the instantaneous voltage is dropped on the second resistor R2, the level J1 at the first end of the first resistor R1 is not too low to damage the device, the instantaneous current magnitude Ishort of the short circuit is equal to the ratio of the instantaneous voltage of the high-voltage capacitor CHV to the resistance value of the second resistor R2, and the instantaneous current magnitude Ishort of the short circuit is limited by the second resistor R2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010669700.5A CN111679220A (en) | 2020-07-13 | 2020-07-13 | Detection circuit and detection method for overcurrent and short circuit of high-voltage power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010669700.5A CN111679220A (en) | 2020-07-13 | 2020-07-13 | Detection circuit and detection method for overcurrent and short circuit of high-voltage power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116047324A (en) * | 2023-03-07 | 2023-05-02 | 宁波阔野科技有限公司 | Matrix switch short circuit detection circuit and detection method for battery pack |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116047324A (en) * | 2023-03-07 | 2023-05-02 | 宁波阔野科技有限公司 | Matrix switch short circuit detection circuit and detection method for battery pack |
| CN116047324B (en) * | 2023-03-07 | 2023-10-10 | 宁波阔野科技有限公司 | Matrix switch short circuit detection circuit and detection method for battery pack |
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