CN220570464U - Power supply circuit, battery management system and power utilization device - Google Patents
Power supply circuit, battery management system and power utilization device Download PDFInfo
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- CN220570464U CN220570464U CN202321963808.0U CN202321963808U CN220570464U CN 220570464 U CN220570464 U CN 220570464U CN 202321963808 U CN202321963808 U CN 202321963808U CN 220570464 U CN220570464 U CN 220570464U
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- 238000004804 winding Methods 0.000 claims abstract description 35
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- 238000004891 communication Methods 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 11
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- 239000003990 capacitor Substances 0.000 description 15
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Abstract
The application discloses a power supply circuit, a battery management system and an electricity utilization device. The power supply circuit includes: the transformer comprises a primary winding and a secondary winding, the secondary winding at least comprises a first tap, a second tap and a third tap, the third tap is positioned between the first tap and the second tap, the first tap and the second tap are respectively connected with a first output end and a grounding end, and the third tap is connected with a second output end; and the input end of the voltage stabilizer is connected with the second output end, and the voltage stabilizer is used for converting the second voltage of the second output end into the third voltage. According to the embodiment of the application, the efficiency of the power supply circuit is improved.
Description
Technical Field
The present disclosure relates to power technology, and more particularly, to a power circuit, a battery management system, and an electric device.
Background
The battery management system may include a plurality of functional modules, and the voltage output by the power supply circuit may be sampled to power the functional modules in the battery management system.
At least part of different functional modules of the battery management system need different power supply voltages, and the power supply circuit is required to output at least two different voltages. However, the power supply circuit in the related art has a problem of low efficiency.
Disclosure of Invention
The application provides a power supply circuit, a battery management system and an electricity utilization device, which are beneficial to improving the efficiency of the power supply circuit.
In a first aspect, the present application provides a power supply circuit comprising: the transformer comprises a primary winding and a secondary winding, the secondary winding at least comprises a first tap, a second tap and a third tap, the third tap is positioned between the first tap and the second tap, the first tap and the second tap are respectively connected with a first output end and a grounding end, and the third tap is connected with a second output end;
and the input end of the voltage stabilizer is connected with the second output end, and the voltage stabilizer is used for converting the second voltage of the second output end into the third voltage.
In a possible implementation manner of the first aspect, the voltage at the first output terminal is a first voltage, a difference between the first voltage and the third voltage is a first difference, a difference between the second voltage and the third voltage is a second difference, and an absolute value of the second difference is smaller than an absolute value of the first difference.
In a possible implementation manner of the first aspect, the voltage of the first output terminal is a first voltage, the second voltage is smaller than the first voltage, and the second voltage is greater than or equal to the third voltage.
In a possible implementation manner of the first aspect, the third tap is a center tap of the secondary winding.
In a possible implementation manner of the first aspect, the power supply circuit further includes:
the positive pole of the first diode is connected with the third tap, and the negative pole of the first diode is connected with the second output end.
In a possible implementation manner of the first aspect, the power supply circuit further includes:
the driver comprises a first driving pin, a second driving pin, a power input pin, a first switch and a second switch;
the primary winding comprises a fourth tap, a fifth tap and a sixth tap, and the sixth tap is positioned between the fourth tap and the fifth tap;
the fourth tap is connected with the first driving pin, the fifth tap is connected with the second driving pin, and the sixth tap is connected with the power input pin;
the first driving pin is connected with a first pole of the first switch, and a second pole of the first switch is grounded;
the second driving pin is connected with a first pole of the second switch, and the second pole of the second switch is grounded;
the power input pin is used for being connected with a driving power supply.
In a possible implementation manner of the first aspect, the power supply circuit further includes a second diode, a third diode, a fourth diode, and a fifth diode;
the anode of the second diode is connected with the first tap, and the cathode of the second diode is connected with the first output end;
the anode of the third diode is connected with the grounding end, and the cathode of the third diode is connected with the second tap;
the anode of the fourth diode is connected with the second tap, and the cathode of the fourth diode is connected with the first output end;
the positive pole of fifth diode is connected to ground terminal, and the negative pole of fifth diode is connected to first tap.
In a possible implementation manner of the first aspect, the power supply circuit further includes a filtering module, the filtering module is connected to an input terminal of the voltage regulator, and the filtering module is configured to filter the interference signal.
Based on the same inventive concept, in a second aspect, embodiments of the present application provide a battery management system, comprising a power supply circuit according to any one of the embodiments of the first aspect.
In one possible implementation of the first aspect, the battery management system further includes a high voltage sampling circuit including an analog-to-digital converter, an isolated communication chip, and a processor;
the first output end of the power circuit is connected with the analog-digital converter, and the output end of the voltage stabilizer in the power circuit is connected with the isolation communication chip.
Based on the same inventive concept, in a third aspect, an embodiment of the present application provides an electrical device, including a battery management system according to any one of the embodiments of the first aspect.
According to the power supply circuit, the battery management system and the power utilization device provided by the embodiment of the application, as the third tap is positioned between the first tap and the second tap, the second voltage of the second output end is smaller than the first voltage of the first output end. The input end of the voltage stabilizer is connected with the second output end, and under the condition that the voltage stabilizer is used for reducing voltage, the input end of the voltage stabilizer is connected with the first output end relative to the input end of the voltage stabilizer, and the second voltage of the input end of the voltage stabilizer is connected with the second output end and can be closer to the third voltage output by the voltage stabilizer, so that the conversion efficiency is improved, and the efficiency of a power circuit is improved.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a power circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a power circuit according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a power circuit according to another embodiment of the present application;
fig. 4 is a schematic structural diagram of a power circuit according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of a power supply circuit according to another embodiment of the present application;
FIG. 6 is a schematic diagram illustrating the operation of a power circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating an operating principle of a power supply circuit according to another embodiment of the present application;
fig. 8 is a schematic structural diagram of a battery management system according to an embodiment of the present application.
Reference numerals illustrate:
10. a power supply circuit;
11. a transformer; 12. a voltage stabilizer; 13. a driver; 131. a gate driving module; 14. a filtering module;
21. an analog-to-digital converter; 22. isolating the communication chip; 23. a processor.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
As mentioned in the background art, the power supply circuit in the related art has a problem of low efficiency.
Taking a high-voltage sampling circuit in the battery management system as an example, the high-voltage sampling circuit can be provided with an independent analog-digital converter (Analog to Digital Converter, ADC), an isolated communication chip and a processor, the ADC can convert the acquired analog signals into digital signals, and the converted digital signals can be transmitted to the processor through the isolated communication chip. The power supply voltage required for the ADC and the isolated communication chip are different, for example, the ADC requires a power supply voltage of 13V and the isolated communication chip requires a power supply voltage of 5V.
However, the power supply circuit in the related art directly converts 13V into 5V, which has a problem of low efficiency.
In order to solve the above technical problems, the embodiments of the present application provide a power circuit, a battery management system, and an electric device, and the power circuit, the battery management system, and the electric device provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The power supply circuit provided in the application embodiment is first described below.
As shown in fig. 1, the power supply circuit 10 may include a transformer 11 and a voltage regulator 12.
The transformer 11 includes a primary winding, a secondary winding, a first output terminal P1, a second output terminal P2, and the secondary winding may include at least a first tap 1, a second tap 2, and a third tap 3, the third tap 3 being located between the first tap 1 and the second tap 2.
The first tap 1 and the second tap 2 are connected to the first output terminal P1 and the ground terminal GND, respectively. For example, the first tap 1 is connected to the first output terminal P1, the second tap 2 is connected to the ground terminal GND, or the first tap 1 is connected to the ground terminal GND, and the second tap 2 is connected to the first output terminal P1.
The third tap 3 is connected to the second output terminal P2. The input end of the voltage regulator 12 is connected to the second output end P2, and the voltage regulator 12 is configured to convert the second voltage at the second output end P2 into a third voltage. For example, the voltage regulator 12 may output a third voltage through the third output terminal P3.
According to the power supply circuit of the embodiment of the present application, since the third tap 3 is located between the first tap 1 and the second tap 2, the second voltage of the second output terminal P2 is smaller than the first voltage of the first output terminal P1. The input end of the voltage stabilizer 12 is connected to the second output end P2, and under the condition that the voltage stabilizer 12 is used for reducing voltage, the input end of the voltage stabilizer 12 is connected to the first output end P1 relative to the input end of the voltage stabilizer 12, and the second voltage of the input end of the voltage stabilizer 12 is connected to the second output end P2 and can be closer to the third voltage output by the voltage stabilizer 12, so that the conversion efficiency is improved, and the efficiency of the power circuit is improved.
In some embodiments, the voltage at the first output terminal P1 is the first voltage V1, the voltage at the second output terminal P2 is the second voltage V2, and the voltage regulator 12 can output the third voltage V3 through the third output terminal P3.
The difference between the first voltage V1 and the third voltage V3 is a first difference, the difference between the second voltage V2 and the third voltage V3 is a second difference, and the absolute value of the second difference is smaller than that of the first difference. That is, |v2-v3| < |v1-v3|.
In this way, whether the voltage regulator 12 is used for reducing or increasing voltage, the input end of the voltage regulator 12 is connected to the first output end P1, and the second voltage of the input end of the voltage regulator 12 connected to the second output end P2 is closer to the third voltage output by the voltage regulator 12, so that the conversion efficiency is improved.
As an example, the first voltage V1 at the first output terminal P1 may be used to supply power to an ADC in the high voltage sampling circuit, and the third voltage V3 output by the voltage regulator 12 may be used to supply power to an isolated communication chip in the high voltage sampling circuit. The first voltage V1 may be 13V and the third voltage V3 may be 5V.
In some embodiments, the regulator 12 may include an LDO (low dropout regulator, low dropout linear regulator) that may be used for buck.
In some embodiments, the voltage at the first output terminal is a first voltage, the second voltage is less than the first voltage, and the second voltage is greater than or equal to the third voltage. That is, V3 is less than or equal to V2 and less than V1, and the voltage regulator 12 can directly convert the voltage by LDO to obtain a stable third voltage.
The second voltage V2 may be, for example, 5.6V.
Taking the first voltage V1 as 13V, the second voltage V2 as 5.6V, and the third voltage V3 as 5V as an example, the conversion efficiency of the voltage regulator 12 converting the first voltage V1 into the third voltage V3 is about 38.4%, and the conversion efficiency of the voltage regulator 12 converting the second voltage V2 into the third voltage V3 is about 89.3%. It can be seen that the efficiency can be significantly improved when the input terminal of the voltage regulator 12 is connected to the second output terminal P2.
The specific structure of the voltage regulator 12 is not limited in this application, and the voltage regulator 12 may be capable of converting the second voltage at the second output terminal into the third voltage. For example, the regulator 12 may be configured as an existing LDO.
In some alternative embodiments, the third tap 3 is the center tap of the secondary winding. Therefore, the existing transformer tap can be directly utilized, and transformers in other tap forms do not need to be additionally designed, so that the cost is reduced.
Of course, the tap form of the transformer can be designed according to actual requirements.
The number of turns of the primary winding and the number of turns of the secondary winding of the transformer 11 may be set according to actual requirements, and this is not limited in this application.
The transformer 11 may be a transformer isolated from a magnetic core. Of course, the specific type and model of the transformer are not limited in the present application, as long as the function of the transformer can be achieved.
In some alternative embodiments, as shown in fig. 2, the power circuit 10 may further include a first diode D11, where an anode of the first diode D11 is connected to the third tap 3, and a cathode of the first diode D11 is connected to the second output terminal P2.
The current on the secondary winding of the transformer 11 may be ac and the direction of the current on the secondary winding may be changed, for example, in the forward period the direction of the current is directed from the first tap 1 to the second tap 2 and in the reverse period the direction of the current is directed from the second tap 2 to the first tap 1. The first diode D11 may be used as a rectifying diode for blocking during the reverse period, thereby preventing current from flowing backward.
In some embodiments, as shown in fig. 3, the power circuit 10 may further include a driver 13. The driver 13 includes a first driving pin D1, a second driving pin D2, and a power input pin Vcc. The primary winding of the transformer 11 may comprise a fourth tap 4, a fifth tap 5 and a sixth tap 6, the sixth tap 6 being located between the fourth tap 4 and the fifth tap 5. The sixth tap 6 may be, for example, a center tap of the primary winding. The fourth tap 4 is connected to the first drive pin D1, the fifth tap 5 is connected to the second drive pin D2, and the sixth tap 6 is connected to the power input pin Vcc. The first driving pin D1 and the second driving pin D2 may be alternately connected to the ground GND through a switch, which will hereinafter be described as a connection relationship between the first driving pin D1, the second driving pin D2 and the switch. The power input pin Vcc is used for accessing the driving power supply Vi n.
The voltage of the driving power supply Vi n is a positive dc voltage.
In the embodiment of the application, the first driving pin D1 and the second driving pin D2 are alternately connected to the ground terminal GND, and in the case that the first driving pin D1 is connected to the ground terminal GND, the fourth tap 4 of the primary winding is grounded, the sixth tap 6 is connected to the driving power supply Vi n, and the current direction on the primary winding is directed from the sixth tap 6 to the fourth tap 4; when the second driving pin D2 is connected to the ground GND, the fifth tap 5 of the primary winding is grounded, the sixth tap 6 is connected to the driving power supply Vi n, and the current direction on the primary winding is directed from the sixth tap 6 to the fifth tap 5; in this way, the direction of the current on the primary winding of the transformer 11 can be periodically changed, so that the induced electromotive force is generated on the secondary winding.
In some alternative embodiments, the power input pin Vcc is connected to the driving power supply Vi n, and the fourth voltage of the driving power supply Vi n is V4, where V4 may be equal to V3. Of course, in other examples, V4 and V3 may not be equal.
For example, the third voltage V3 and the fourth voltage V4 may each be 5V.
As an example, as shown in fig. 4, the driver 13 may include a first switch and a second switch and the gate driving module 131, the first switch may include a first transistor Q1, the second switch may include a second transistor Q2, the gate driving module 131 may include a first gate control terminal Q1 and a second gate control terminal Q2, the first gate control terminal Q1 is connected to a gate of the first transistor Q1, and the second gate control terminal Q2 is connected to a gate of the second transistor Q2. A first pole of the first transistor Q1 is connected to the first driving pin D1, and a second pole of the first transistor Q1 is connected to the first ground pin G1. The first pole of the second transistor Q2 is connected to the second driving pin D2, and the second pole of the second transistor Q2 is connected to the second ground pin G2. The first ground pin G1 and the second ground pin G2 are connected to the ground GND.
The first gate control terminal Q1 and the second gate control terminal Q2 may be used to output a control signal such that the first transistor Q1 and the second transistor Q2 are alternately turned on. That is, the first gate control terminal Q1 and the second gate control terminal Q2 may be used to output a control signal such that the second transistor Q2 is turned off when the first transistor Q1 is turned on, and the second transistor Q2 is turned on when the first transistor Q1 is turned off.
The structure of the driver 13 shown in fig. 4 is only an example and is not intended to limit the present application.
In some alternative embodiments, as shown in fig. 5, the power circuit 10 may further include a second diode D12, a third diode D13, a fourth diode D14, and a fifth diode D15.
The positive pole of the second diode D12 is connected with the first tap 1, and the negative pole of the second diode D12 is connected with the first output end P1. The positive pole of the third diode D13 is connected to the ground GND, and the negative pole of the third diode D13 is connected to the second tap 2. The positive pole of the fourth diode D14 is connected to the second tap 2, and the negative pole of the fourth diode D14 is connected to the first output terminal P1. The positive pole of the fifth diode D15 is connected to the ground GND, and the negative pole of the fifth diode D15 is connected to the first tap 1.
In this embodiment, the second diode D12, the third diode D13, the fourth diode D14 and the fifth diode D15 may play a role in rectification, and under the condition that any one of the first transistor Q1 and the second transistor Q2 is turned on, the complete coil with the secondary winding outputs the first voltage V1 to the first output end P1, and the partial coil with the secondary winding outputs the second voltage V2 to the second output end P2.
For a clearer understanding of the operation of the transformer in the power circuit, please refer to fig. 6 and 7.
When the first transistor Q1 is turned on and the second transistor Q2 is turned off, the fourth tap 4 of the primary winding of the transformer 11 is grounded, the voltage of the first tap 1 of the secondary winding is negative, the voltage of the second tap 2 is positive, the second diode D12 and the third diode D13 are turned off, the fourth diode D14 and the fifth diode D15 are turned on, the second tap 2 is connected to the first output terminal P1 through the fourth diode D14, and the first tap 1 is connected to the ground terminal GND through the fifth diode D15.
When the first transistor Q1 is turned off and the second transistor Q2 is turned on, the fifth tap 5 of the primary winding of the transformer 11 is grounded, the voltage of the first tap 1 of the secondary winding is positive, the voltage of the second tap 2 is negative, the second diode D12 and the third diode D13 are turned on, the fourth diode D14 and the fifth diode D15 are turned off, the first tap 1 is connected to the first output terminal P1 through the second diode D12, and the second tap 2 is connected to the ground terminal GND through the third diode D13.
The first diode D11 is turned on in the case where the first transistor Q1 is turned on and the second transistor Q2 is turned off, or in the case where the first transistor Q1 is turned off and the second transistor Q2 is turned on.
In some alternative embodiments, as shown in fig. 5, the power circuit 10 may further include a filtering module 14, where the filtering module 14 may be connected to an input terminal of the voltage regulator 12, and the filtering module 14 may be configured to filter out the interference signal. In this way, the stability of the voltage applied to the input terminal of the voltage regulator 12 can be improved.
For example, the filtering module 14 may include a first capacitor C1, one end of the first capacitor C1 may be connected to the input terminal of the voltage regulator 12, and the other end of the first capacitor C1 may be connected to the ground GND.
For example, as shown in fig. 5, the power circuit 10 may further include a second capacitor C2 and a third capacitor C3. One end of the second capacitor C2 is connected with the power input pin Vcc, and the other end of the second capacitor C2 is connected with the ground end GND. One end of the third capacitor C3 is connected with the power input pin Vcc, and the other end of the third capacitor C3 is connected with the ground end GND. The second capacitor C2 and the third capacitor C3 may also function as a filter.
Based on the same inventive concept, the embodiments of the present application also provide a battery management system, including the high voltage sampling circuit in any of the above embodiments. It can be appreciated that the battery management system has the beneficial effects of the power supply circuit provided in the embodiments of the present application, and specific descriptions of the power supply circuit in the above embodiments may be referred to, which is not repeated herein.
In some alternative embodiments, as shown in fig. 8, the battery management system may include a high voltage sampling circuit that may include an analog to digital converter 21, an isolated communication chip 22, and a processor 23. The high-voltage sampling circuit can be used for collecting the voltage of the battery pack, so that the voltage of the battery pack is monitored.
The first output terminal P1 of the power circuit 10 may be connected to the analog-to-digital converter 21, and the first voltage V1 output by the first output terminal P1 may supply power to the analog-to-digital converter 21. The output terminal P3 of the voltage regulator in the power circuit 10 may be connected to the isolated communication chip 22, and the third voltage V3 output from the output terminal P3 may be used to supply power to the isolated communication chip 22.
The first voltage V1 is, for example, 13V and the third voltage V3 is 5V.
For example, the high voltage sampling circuit may include a first resistor Ra and a second resistor Rb connected in series between a positive pole b+ of the battery pack and a negative pole B-of the battery pack. The input end of the analog-digital converter 21 is connected to the connection point between the first resistor Ra and the second resistor Rb, and the signal output by the output end of the analog-digital converter 21 is transmitted to the processor 23 through the isolated communication chip 22.
The processor 23 may comprise a micro control unit (Microcontroller Unit, MCU).
The analog-to-digital converter 21 may be used to convert an analog signal into a digital signal, and the specific structure of the analog-to-digital converter 21 is not limited in this application as long as it can realize the corresponding function.
The isolated communication chip 22 may be used for high-low voltage isolated communication, and the specific structure of the isolated communication chip 22 is not limited in this application, as long as it can implement the corresponding function.
Based on the same inventive concept, the application also provides an electric device. The power device includes a battery management system including the high voltage sampling circuit of any of the above embodiments. It can be understood that the power consumption device has the beneficial effects of the high-voltage sampling circuit provided in the embodiments of the present application, and specific descriptions of the high-voltage sampling circuit in the above embodiments may be referred to, which is not repeated herein.
In the embodiments shown in the above figures, the capacitor is represented by a single capacitor. In other embodiments, the capacitor may also be an integration of series, parallel, or series-parallel capacitors. Specific parameters of each device can be set according to actual requirements, and the application is not limited to the specific parameters.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and in particular, the technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (11)
1. A power supply circuit, comprising:
the transformer comprises a primary winding and a secondary winding, the secondary winding at least comprises a first tap, a second tap and a third tap, the third tap is positioned between the first tap and the second tap, the first tap and the second tap are respectively connected with a first output end and a grounding end, and the third tap is connected with a second output end;
and the input end of the voltage stabilizer is connected with the second output end, and the voltage stabilizer is used for converting the second voltage of the second output end into a third voltage.
2. The power supply circuit of claim 1, wherein the voltage at the first output terminal is a first voltage, the difference between the first voltage and the third voltage is a first difference, the difference between the second voltage and the third voltage is a second difference, and the absolute value of the second difference is smaller than the absolute value of the first difference.
3. The power supply circuit according to claim 1 or 2, wherein the voltage of the first output terminal is a first voltage, the second voltage is smaller than the first voltage, and the second voltage is greater than or equal to the third voltage.
4. A power supply circuit according to claim 1 or 2, wherein the third tap is a center tap of the secondary winding.
5. The power supply circuit according to claim 1 or 2, characterized in that the power supply circuit further comprises:
the positive electrode of the first diode is connected with the third tap, and the negative electrode of the first diode is connected with the second output end.
6. The power supply circuit according to claim 1 or 2, characterized in that the power supply circuit further comprises:
a driver including a first drive pin, a second drive pin, a power input pin, a first switch, and a second switch;
the primary winding includes a fourth tap, a fifth tap, and a sixth tap, the sixth tap being located between the fourth tap and the fifth tap;
the fourth tap is connected with the first driving pin, the fifth tap is connected with the second driving pin, and the sixth tap is connected with the power input pin;
the first driving pin is connected with a first pole of the first switch, and a second pole of the first switch is connected with a grounding end;
the second driving pin is connected with a first pole of the second switch, and a second pole of the second switch is connected with a grounding end;
the power input pin is used for being connected with a driving power supply.
7. The power supply circuit according to claim 1 or 2, characterized in that the power supply circuit further comprises a second diode, a third diode, a fourth diode and a fifth diode;
the positive electrode of the second diode is connected with the first tap, and the negative electrode of the second diode is connected with the first output end;
the anode of the third diode is connected with the grounding end, and the cathode of the third diode is connected with the second tap;
the anode of the fourth diode is connected with the second tap, and the cathode of the fourth diode is connected with the first output end;
and the positive electrode of the fifth diode is connected with the grounding end, and the negative electrode of the fifth diode is connected with the first tap.
8. The power supply circuit according to claim 1 or 2, further comprising a filtering module, wherein the filtering module is connected to the input terminal of the voltage regulator, and the filtering module is configured to filter out an interference signal.
9. A battery management system comprising a power supply circuit as claimed in any one of claims 1 to 8.
10. The battery management system of claim 9, further comprising a high voltage sampling circuit comprising an analog-to-digital converter, an isolated communication chip, and a processor;
the first output end of the power supply circuit is connected with the analog-digital converter, and the output end of the voltage stabilizer in the power supply circuit is connected with the isolation communication chip.
11. An electrical device comprising a battery management system as claimed in claim 9 or 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321963808.0U CN220570464U (en) | 2023-07-24 | 2023-07-24 | Power supply circuit, battery management system and power utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321963808.0U CN220570464U (en) | 2023-07-24 | 2023-07-24 | Power supply circuit, battery management system and power utilization device |
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| Publication Number | Publication Date |
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| CN220570464U true CN220570464U (en) | 2024-03-08 |
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| CN202321963808.0U Active CN220570464U (en) | 2023-07-24 | 2023-07-24 | Power supply circuit, battery management system and power utilization device |
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2023
- 2023-07-24 CN CN202321963808.0U patent/CN220570464U/en active Active
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