CN215813163U - Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe - Google Patents
Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe Download PDFInfo
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- CN215813163U CN215813163U CN202121763095.4U CN202121763095U CN215813163U CN 215813163 U CN215813163 U CN 215813163U CN 202121763095 U CN202121763095 U CN 202121763095U CN 215813163 U CN215813163 U CN 215813163U
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Abstract
The utility model relates to a fault detection circuit of a switch tube, a BMS system, a power supply device and a battery replacement cabinet, comprising: the circuit comprises a control circuit, a sampling circuit, a driving circuit and a switching tube; the first end of the driving circuit is connected with the control circuit, the second end of the driving circuit is connected with the first end of the switching tube, the second end of the switching tube is grounded, and the third end of the switching tube outputs a switching signal; the sampling end of the sampling circuit is connected with the first end of the switch tube, and the output end of the sampling circuit is connected with the control circuit; the driving circuit is used for driving the switching tube to work according to the control signal output by the control circuit; the switching tube is used for controlling the on-off according to the driving of the driving circuit; the sampling circuit is used for sampling and monitoring the switching tube and outputting a sampling signal to the control circuit; and the control circuit is used for carrying out fault detection on the switching tube according to the sampling signal. The utility model can detect whether the switch tube is in fault in any state, and has high fault detection precision and good reliability.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a fault detection circuit of a switching tube, a BMS system, a power supply device and a power change cabinet.
Background
In a conventional BATTERY management system (BATTERY MANAGEMENT SYSTEM, BMS), a MOS transistor failure is generally determined by detecting a charge/discharge current after the MOS transistor is turned off, and if a current still exists, the MOS transistor is considered to have a failure. This detection scheme can only detect in a charging state or a discharging state, and if in an idling state, a fault cannot be detected.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to provide a fault detection circuit of a switching tube, a BMS system, a power supply device, and a power distribution cabinet, which address the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a fault detection circuit for a switching tube is constructed, comprising: the circuit comprises a control circuit, a sampling circuit, a driving circuit and a switching tube;
the first end of the driving circuit is connected with the control circuit, the second end of the driving circuit is connected with the first end of the switching tube, the second end of the switching tube is grounded, and the third end of the switching tube outputs a switching signal; the sampling end of the sampling circuit is connected with the first end of the switch tube, and the output end of the sampling circuit is connected with the control circuit;
the driving circuit is used for driving the switching tube to work according to the control signal output by the control circuit;
the switching tube is used for controlling the on-off according to the driving of the driving circuit;
the sampling circuit is used for sampling and monitoring the switching tube and outputting a sampling signal to the control circuit;
and the control circuit is used for carrying out fault detection on the switching tube according to the sampling signal.
In the fault detection circuit of a switching tube according to the present invention, the switching tube includes: a first MOS transistor;
the first end of the switch tube is the grid electrode of the first MOS tube, the second end of the switch tube is the source electrode of the first MOS tube, and the third end of the switch tube is the drain electrode of the first MOS tube.
In the fault detection circuit of a switching tube according to the present invention, the driving circuit includes: the first resistor, the first triode, the second triode, the third resistor and the fifth resistor;
the first end of the first resistor is connected with VCC, the second end of the first resistor is connected with the collector of the first triode, the base of the first triode and the base of the second triode are in short circuit and are connected to the driving signal output end of the control circuit, the emitter of the first triode and the emitter of the second triode are in short circuit and are connected to the first end of the third resistor, and the second end of the third resistor is connected with the grid of the first MOS tube;
the collector of the second triode is grounded, and the first end of the fifth resistor is connected with the base of the first triode and the base of the second triode.
In the fault detection circuit of the switching tube, the first triode is an N-type triode; the second triode is a P-type triode.
In the fault detection circuit of a switching tube according to the present invention, the sampling circuit includes: a voltage dividing circuit;
the first end of the voltage division circuit is used as the sampling end of the sampling circuit to be connected with the first end of the switch tube, the second end of the voltage division circuit is grounded, and the third end of the voltage division circuit is used as the output end of the sampling circuit to be connected with the sampling signal input end of the control circuit.
In the fault detection circuit of a switching tube according to the present invention, the sampling circuit further includes: a switching circuit;
the input end of the switch circuit is connected with the third end of the voltage division circuit, and the output end of the switch circuit is connected with the sampling signal input end of the control circuit.
In the fault detection circuit of a switching tube according to the present invention, the voltage dividing circuit includes: a second resistor and a fourth resistor;
the first end of the second resistor is connected with the grid electrode of the first MOS transistor, the second end of the second resistor is connected with the first end of the fourth resistor, the second end of the fourth resistor is grounded, and the connecting end of the second resistor and the first end of the fourth resistor is connected with the sampling signal input end of the control circuit;
the first end of the second resistor is the first end of the voltage division circuit, the second end of the fourth resistor is the second end of the voltage division circuit, and the connecting end of the second resistor and the first end of the fourth resistor is the third end of the voltage division circuit.
In the fault detection circuit of a switching tube according to the present invention, the switching circuit includes: a seventh resistor and a second switch;
the first end of the seventh resistor is connected with VDD, the second end of the seventh resistor is connected with the second end of the second switch, the first end of the second switch is connected with the second end of the second resistor and the connecting end of the first end of the fourth resistor, the third end of the second switch is grounded, and the second end of the second switch tube is further connected to the sampling signal input end of the control circuit.
In the fault detection circuit of a switching tube according to the present invention, the second switch includes: a triode or MOS tube;
when the second switch is a triode, a first end of the second switch is a base electrode of the triode, a second end of the second switch is a collector electrode of the triode, and a third end of the second switch is an emitter electrode of the triode;
when the second switch is an MOS tube, the first end of the second switch is the grid electrode of the MOS tube, the second end of the second switch is the drain electrode of the MOS tube, and the third end of the second switch is the source electrode of the MOS tube.
The utility model also provides a BMS system which comprises the fault detection circuit of the switching tube.
The utility model also provides a power supply device which comprises the BMS system.
The utility model also provides a battery replacement cabinet which comprises the power supply device.
The implementation of the fault detection circuit of the switching tube, the BMS system, the power supply device and the power exchange cabinet has the following beneficial effects: the method comprises the following steps: the circuit comprises a control circuit, a sampling circuit, a driving circuit and a switching tube; the first end of the driving circuit is connected with the control circuit, the second end of the driving circuit is connected with the first end of the switching tube, the second end of the switching tube is grounded, and the third end of the switching tube outputs a switching signal; the sampling end of the sampling circuit is connected with the first end of the switch tube, and the output end of the sampling circuit is connected with the control circuit; the driving circuit is used for driving the switching tube to work according to the control signal output by the control circuit; the switching tube is used for controlling the on-off according to the driving of the driving circuit; the sampling circuit is used for sampling and monitoring the switching tube and outputting a sampling signal to the control circuit; and the control circuit is used for carrying out fault detection on the switching tube according to the sampling signal. The utility model can detect whether the switch tube is in fault in any state, and has high fault detection precision and good reliability.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic block diagram of a first embodiment of a fault detection circuit of a switching tube according to the present invention;
FIG. 2 is a schematic block diagram of a second embodiment of a fault detection circuit for a switching tube according to the present invention
FIG. 3 is a circuit diagram of a first embodiment of the circuit for detecting the fault of the switching tube according to the present invention;
fig. 4 is a circuit diagram of a second embodiment of the fault detection circuit of the switching tube provided by the utility model.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a schematic block diagram of an alternative embodiment of the fault detection circuit of the switching tube 13 provided by the present invention is that the fault detection circuit of the switching tube 13 can be applied to a BMS system, and can detect whether the switching tube 13 is faulty or not in any state of the BMS system (including, but not limited to, a charging state, a discharging state, and an idling state), so as to effectively improve the precision of fault detection and reliability and safety.
Specifically, as shown in fig. 1, the fault detection circuit of the switching tube 13 includes: a control circuit 11, a sampling circuit 14, a drive circuit 12 and a switch tube 13.
A first end of the driving circuit 12 is connected with the control circuit 11, a second end of the driving circuit 12 is connected with a first end of the switching tube 13, a second end of the switching tube 13 is grounded, and a third end of the switching tube 13 outputs a switching signal; the sampling end of the sampling circuit 14 is connected with the first end of the switch tube 13, and the output end of the sampling circuit 14 is connected with the control circuit 11.
In the embodiment of the present invention, the driving circuit 12 is configured to drive the switching tube 13 to operate according to the control signal output by the control circuit 11. Specifically, the driving circuit 12 drives the switching tube 13 to be turned on or off according to the control signal output by the control circuit 11, so as to output a corresponding switching signal to the subsequent circuit.
The switching tube 13 is used for switching on or off according to the driving control of the driving circuit 12. Optionally, the switching tube 13 in the embodiment of the present invention may be an MOS tube.
The sampling circuit 14 is used for sampling and monitoring the switching tube 13 and outputting a sampling signal to the control circuit 11.
Optionally, in some embodiments, as shown in fig. 1, the sampling circuit 14 includes: a voltage divider circuit 1401.
In this embodiment, a first terminal of the voltage dividing circuit 1401 is used as a sampling terminal of the sampling circuit 14 and is connected to a first terminal of the switching tube 13, a second terminal of the voltage dividing circuit 1401 is grounded, and a third terminal of the voltage dividing circuit 1401 is used as an output terminal of the sampling circuit 14 and is connected to a sampling signal input terminal of the control circuit 11.
Alternatively, in some other embodiments, as shown in fig. 2, the sampling circuit 14 includes: a voltage dividing circuit 1401 and a switching circuit 1402. In this embodiment, a first terminal of the voltage dividing circuit 1401 is connected to a first terminal of the switching tube 13 as a sampling terminal of the sampling circuit 14, a second terminal of the voltage dividing circuit 1401 is grounded, an input terminal of the switching circuit 1402 is connected to a third terminal of the voltage dividing circuit 1401, and an output terminal of the switching circuit 1402 is connected to a sampling signal input terminal of the control circuit 11.
The control circuit 11 is used for carrying out fault detection on the switching tube 13 according to the sampling signal.
Optionally, in some embodiments, the control circuit 11 includes a control chip, and the control chip includes but is not limited to a single chip, an embedded chip, and the like.
Referring to fig. 3, a circuit diagram of a first embodiment of the fault detection circuit of the switching tube 13 according to the present invention is shown.
As shown in fig. 3, in this embodiment, the switching tube 13 includes: the first MOS transistor M1.
The first end of the switch tube 13 is the gate of the first MOS transistor M1, the second end of the switch tube 13 is the gate of the first MOS transistor M1, and the third end of the switch tube 13 is the drain of the first MOS transistor M1.
The drive circuit 12 includes: the circuit comprises a first resistor R1, a first triode Q1, a second triode Q2, a third resistor R3 and a fifth resistor R5.
A first end of the first resistor R1 is connected to VCC, a second end of the first resistor R1 is connected to a collector of the first triode Q1, a base of the first triode Q1 and a base of the second triode Q2 are short-circuited and connected to a driving signal output end of the control circuit 11, an emitter of the first triode Q1 and an emitter of the second triode Q2 are short-circuited and connected to a first end of the third resistor R3, and a second end of the third resistor R3 is connected to a gate of the first MOS transistor M1; the collector of the second transistor Q2 is grounded, and the first end of the fifth resistor R5 is connected to the base of the first transistor Q1 and the base of the second transistor Q2. Optionally, in this embodiment, the first transistor Q1 is an N-type transistor; the second transistor Q2 is a P-type transistor.
The voltage dividing circuit 1401 includes: a second resistor R2 and a fourth resistor R4.
A first end of the second resistor R2 is connected to the gate of the first MOS transistor M1, a second end of the second resistor R2 is connected to a first end of the fourth resistor R4, a second end of the fourth resistor R4 is grounded, and a connection end between a second end of the second resistor R2 and a first end of the fourth resistor R4 is connected to a sampling signal input end of the control circuit 11; the first end of the second resistor R2 is the first end of the voltage dividing circuit 1401, the second end of the fourth resistor R4 is the second end of the voltage dividing circuit 1401, and the connection end of the second resistor R2 and the first end of the fourth resistor R4 is the third end of the voltage dividing circuit 1401.
As shown in fig. 3, in this embodiment, the control circuit 11 includes: and the MCU is used for controlling the opening and closing of the first MOS tube M1, and the grid voltage of the first MOS tube M1 is sampled through the second resistor R2 and the fourth resistor R4. When the control signal is at a high level, the first transistor Q1 is turned on, and VCC supplies power to the gate of the first MOS transistor M1 through the first resistor R1, the first transistor Q1, and the third resistor R3.
When the first MOS transistor M1 fails, the gate-to-source breakdown of the first MOS transistor M1 may be caused, that is, the gate-to-ground low resistance of the first MOS transistor M1 may be caused, at this time, a current flows through the first resistor R1 and the third resistor R3 to generate a voltage drop, so that the voltage across the fourth resistor R4 is reduced, and therefore, the MCU may determine that the first MOS transistor M1 fails by detecting the voltage across the fourth resistor R4 when detecting an abnormal low voltage. In this embodiment, the sampling signal input terminal of the control circuit 11 is an ADC interface.
In this embodiment, no matter in the charging state, the discharging state or the no-load state, the fault detection of the first MOS transistor M1 is not affected, and therefore, whether the first MOS transistor M1 is faulty or not can be effectively detected.
Referring to fig. 4, a circuit diagram of a second embodiment of the fault detection circuit of the switching tube 13 according to the present invention is shown.
As shown in fig. 4, in this embodiment, the switching tube 13 includes: the first MOS transistor M1.
The first end of the switch tube 13 is the gate of the first MOS transistor M1, the second end of the switch tube 13 is the source of the first MOS transistor M1, and the third end of the switch tube 13 is the drain of the first MOS transistor M1.
The drive circuit 12 includes: the circuit comprises a first resistor R1, a first triode Q1, a second triode Q2, a third resistor R3 and a fifth resistor R5.
A first end of the first resistor R1 is connected to VCC, a second end of the first resistor R1 is connected to a collector of the first triode Q1, a base of the first triode Q1 and a base of the second triode Q2 are short-circuited and connected to a driving signal output end of the control circuit 11, an emitter of the first triode Q1 and an emitter of the second triode Q2 are short-circuited and connected to a first end of the third resistor R3, and a second end of the third resistor R3 is connected to a gate of the first MOS transistor M1; the collector of the second transistor Q2 is grounded, and the first end of the fifth resistor R5 is connected to the base of the first transistor Q1 and the base of the second transistor Q2. Optionally, in this embodiment, the first transistor Q1 is an N-type transistor; the second transistor Q2 is a P-type transistor.
The voltage dividing circuit 1401 includes: a second resistor R2 and a fourth resistor R4.
A first end of the second resistor R2 is connected to the gate of the first MOS transistor M1, a second end of the second resistor R2 is connected to a first end of the fourth resistor R4, a second end of the fourth resistor R4 is grounded, and a connection end between a second end of the second resistor R2 and a first end of the fourth resistor R4 is connected to the switch circuit 1402; the first end of the second resistor R2 is the first end of the voltage dividing circuit 1401, the second end of the fourth resistor R4 is the second end of the voltage dividing circuit 1401, and the connection end of the second resistor R2 and the first end of the fourth resistor R4 is the third end of the voltage dividing circuit 1401.
The switch circuit 1402 includes: a seventh resistor R7 and a second switch M2.
A first end of the seventh resistor R7 is connected to VDD, a second end of the seventh resistor R7 is connected to the second end of the second switch M2, a first end of the second switch M2 is connected to the second end of the second resistor R2 and the connection end of the first end of the fourth resistor R4, a third end of the second switch M2 is grounded, and a second end of the second switch M2 tube 13 is further connected to the sampling signal input end of the control circuit 11.
Optionally, in this embodiment, the second switch M2 includes: a triode or a MOS tube. When the second switch M2 is a triode, the first terminal of the second switch M2 is a base of the triode, the second terminal of the second switch M2 is a collector of the triode, and the third terminal of the second switch M2 is an emitter of the triode. When the second switch M2 is a MOS transistor, the first terminal of the second switch M2 is a gate of the MOS transistor, the second terminal of the second switch M2 is a drain of the MOS transistor, and the third terminal of the second switch M2 is a source of the MOS transistor.
As shown in fig. 4, in this embodiment, the control circuit 11 includes: MCU, the opening and closing of first MOS pipe M1 is controlled by MCU, the G utmost point voltage of first MOS pipe M1 is sampled through second resistance R2 and fourth resistance R4, the partial pressure of second resistance R2 and fourth resistance R4 gives the second MOS when control signal is high level, first triode Q1 switches on, VCC supplies power for the grid of first MOS pipe M1 through first resistance R1, first triode Q1, third resistance R3. The second switch M2 includes a MOS transistor.
As shown in fig. 4, voltage is divided by the second resistor R2 and the fourth resistor R4, when the first MOS transistor M1 fails, the terminal voltage of the fourth resistor decreases, the second switch M2 is turned off, and at this time, the drain of the second switch M2 will appear at a high level, so when the MCU controls the first MOS transistor M1 to be turned on, if the MCU detects that the level signal is at a high level, it can determine that the first MOS transistor M1 fails.
In this embodiment, the sampling signal input terminal of the control circuit 11 is a level signal interface.
It can be understood that, when the MOS transistor breaks down, G, D, S three-terminal internal short circuit will occur, low impedance between the G pole and the S pole occurs, and then the driving voltage for connecting the G pole is pulled down, so that whether the first MOS transistor M1 fails can be diagnosed quickly and accurately by detecting the driving voltage of the first MOS transistor M1. In this embodiment, no matter in the charging state, the discharging state or the no-load state, the fault detection of the first MOS transistor M1 is not affected, and therefore, whether the first MOS transistor M1 is faulty or not can be effectively detected.
Further, the present invention also provides a BMS system that may include the fault detection circuit of the switching tube 13 disclosed in the embodiment of the present invention. Through setting up the fault detection circuit at switch tube 13, no matter the battery is in charged state, discharge state or no-load state, all can effectively detect switch tube 13 whether break down, effectively promote reliability, stability and the security of BMS system.
Further, the present invention also provides a power supply device, which may include the fault detection circuit of the switching tube 13 disclosed in the embodiment of the present invention. Through setting up the fault detection circuit at switch tube 13, no matter the battery is in charged state, discharge state or no load state, all can effectively detect switch tube 13 whether break down, effectively promotes power supply unit's reliability, stability and security.
Optionally, the power supply device of the present invention includes, but is not limited to, a battery, a charger, a power supply, and the like.
Further, the utility model also provides a battery replacement cabinet, which can comprise the fault detection circuit of the switch tube 13 disclosed by the embodiment of the utility model. Through setting up the fault detection circuit at switch tube 13, no matter the battery is in charged state, discharge state or no-load state, all can effectively detect switch tube 13 whether break down, effectively promote the reliability, stability and the security of the cabinet of changing electricity.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (12)
1. A circuit for detecting a fault in a switching tube, comprising: the circuit comprises a control circuit, a sampling circuit, a driving circuit and a switching tube;
the first end of the driving circuit is connected with the control circuit, the second end of the driving circuit is connected with the first end of the switching tube, the second end of the switching tube is grounded, and the third end of the switching tube outputs a switching signal; the sampling end of the sampling circuit is connected with the first end of the switch tube, and the output end of the sampling circuit is connected with the control circuit;
the driving circuit is used for driving the switching tube to work according to the control signal output by the control circuit;
the switching tube is used for controlling the on-off according to the driving of the driving circuit;
the sampling circuit is used for sampling and monitoring the switching tube and outputting a sampling signal to the control circuit;
and the control circuit is used for carrying out fault detection on the switching tube according to the sampling signal.
2. The switching tube fault detection circuit of claim 1, wherein the switching tube comprises: a first MOS transistor;
the first end of the switch tube is the grid electrode of the first MOS tube, the second end of the switch tube is the source electrode of the first MOS tube, and the third end of the switch tube is the drain electrode of the first MOS tube.
3. The switching tube fault detection circuit according to claim 2, wherein the driving circuit comprises: the first resistor, the first triode, the second triode, the third resistor and the fifth resistor;
the first end of the first resistor is connected with VCC, the second end of the first resistor is connected with the collector of the first triode, the base of the first triode and the base of the second triode are in short circuit and are connected to the driving signal output end of the control circuit, the emitter of the first triode and the emitter of the second triode are in short circuit and are connected to the first end of the third resistor, and the second end of the third resistor is connected with the grid of the first MOS tube;
the collector of the second triode is grounded, and the first end of the fifth resistor is connected with the base of the first triode and the base of the second triode.
4. The circuit for detecting the failure of the switching tube according to claim 3, wherein the first transistor is an N-type transistor; the second triode is a P-type triode.
5. The switching tube fault detection circuit of claim 3, wherein the sampling circuit comprises: a voltage dividing circuit;
the first end of the voltage division circuit is used as the sampling end of the sampling circuit to be connected with the first end of the switch tube, the second end of the voltage division circuit is grounded, and the third end of the voltage division circuit is used as the output end of the sampling circuit to be connected with the sampling signal input end of the control circuit.
6. The switching tube fault detection circuit of claim 5, wherein the sampling circuit further comprises: a switching circuit;
the input end of the switch circuit is connected with the third end of the voltage division circuit, and the output end of the switch circuit is connected with the sampling signal input end of the control circuit.
7. The switching tube fault detection circuit according to claim 6, wherein the voltage divider circuit comprises: a second resistor and a fourth resistor;
the first end of the second resistor is connected with the grid electrode of the first MOS transistor, the second end of the second resistor is connected with the first end of the fourth resistor, the second end of the fourth resistor is grounded, and the connecting end of the second resistor and the first end of the fourth resistor is connected with the sampling signal input end of the control circuit;
the first end of the second resistor is the first end of the voltage division circuit, the second end of the fourth resistor is the second end of the voltage division circuit, and the connecting end of the second resistor and the first end of the fourth resistor is the third end of the voltage division circuit.
8. The switching tube fault detection circuit according to claim 7, wherein the switching circuit comprises: a seventh resistor and a second switch;
the first end of the seventh resistor is connected with VDD, the second end of the seventh resistor is connected with the second end of the second switch, the first end of the second switch is connected with the second end of the second resistor and the connecting end of the first end of the fourth resistor, the third end of the second switch is grounded, and the second end of the second switch tube is further connected to the sampling signal input end of the control circuit.
9. The switching tube fault detection circuit of claim 8, wherein the second switch comprises: a triode or MOS tube;
when the second switch is a triode, a first end of the second switch is a base electrode of the triode, a second end of the second switch is a collector electrode of the triode, and a third end of the second switch is an emitter electrode of the triode;
when the second switch is an MOS tube, the first end of the second switch is the grid electrode of the MOS tube, the second end of the second switch is the drain electrode of the MOS tube, and the third end of the second switch is the source electrode of the MOS tube.
10. A BMS system comprising a fault detection circuit of a switching tube according to any of claims 1-9.
11. A power supply device characterized by comprising the BMS system of claim 10.
12. A battery changing cabinet comprising the power supply device of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121763095.4U CN215813163U (en) | 2021-07-30 | 2021-07-30 | Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121763095.4U CN215813163U (en) | 2021-07-30 | 2021-07-30 | Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe |
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| CN215813163U true CN215813163U (en) | 2022-02-11 |
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| CN202121763095.4U Active CN215813163U (en) | 2021-07-30 | 2021-07-30 | Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115032516A (en) * | 2022-07-04 | 2022-09-09 | 青岛乾程科技股份有限公司 | Use diagnostic circuit that charges and discharges MOS pipe became invalid in BMS |
| CN116184073A (en) * | 2023-01-07 | 2023-05-30 | 深圳市勤信隆电子有限公司 | Transformer fault on-line monitoring device with communication function |
-
2021
- 2021-07-30 CN CN202121763095.4U patent/CN215813163U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115032516A (en) * | 2022-07-04 | 2022-09-09 | 青岛乾程科技股份有限公司 | Use diagnostic circuit that charges and discharges MOS pipe became invalid in BMS |
| CN116184073A (en) * | 2023-01-07 | 2023-05-30 | 深圳市勤信隆电子有限公司 | Transformer fault on-line monitoring device with communication function |
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