CN218386861U - Power supply circuit capable of being connected with battery in positive and negative directions - Google Patents
Power supply circuit capable of being connected with battery in positive and negative directions Download PDFInfo
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- CN218386861U CN218386861U CN202222227472.3U CN202222227472U CN218386861U CN 218386861 U CN218386861 U CN 218386861U CN 202222227472 U CN202222227472 U CN 202222227472U CN 218386861 U CN218386861 U CN 218386861U
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Abstract
The application provides a can positive reverse connect battery supply circuit includes: a first power supply circuit and a second power supply circuit; the first power supply circuit comprises a first battery input interface, a second battery input interface and a first current limiting circuit used for limiting current to be conducted according to a first direction; the first battery input interface is electrically connected with the second battery input interface through a first current limiting circuit; the second power supply circuit comprises a third battery input interface, a fourth battery input interface and a second current limiting circuit used for limiting current to be conducted according to a second direction; the third battery input interface is electrically connected with the fourth battery input interface through a second current limiting circuit; the first battery input interface is connected with the third battery input interface, and the second battery input interface is connected with the fourth battery input interface; when the battery is connected, the first current limiting circuit and the second current limiting circuit are selected to be conducted. The power supply circuit can supply power under the condition that the battery is connected in the positive direction or the reverse direction.
Description
Technical Field
The application relates to the technical field of reverse connection prevention of batteries, for example to a power supply circuit capable of connecting a battery positively and negatively.
Background
At present, batteries and storage batteries are more and more widely applied, and installation of the batteries and storage batteries of various electronic devices on the market needs to be confirmed by professionals, only circuits can be connected positively, and when the circuits are connected reversely, the batteries and the storage batteries can be damaged, and even safety accidents such as explosion can be caused.
Disclosure of Invention
The application aims to: the utility model provides a can positive and negative connect battery supply circuit, it can improve the integrality that the text detected under the circumstances that text and background differentiation degree of difficulty are great.
To achieve the above object, the present application provides a positive-negative battery power supply circuit, comprising:
a first power supply circuit and a second power supply circuit;
the first power supply circuit comprises a first battery input interface, a second battery input interface and a first current limiting circuit used for limiting current to be conducted according to a first direction;
the first battery input interface is electrically connected with the second battery input interface through the first current limiting circuit;
the second power supply circuit comprises a third battery input interface, a fourth battery input interface and a second current limiting circuit used for limiting current to be conducted according to a second direction;
the third battery input interface is electrically connected with the fourth battery input interface through the second current limiting circuit;
the first battery input interface is connected with the third battery input interface, and the second battery input interface is connected with the fourth battery input interface;
when the battery is connected, the first current limiting circuit and the second current limiting circuit are alternatively conducted.
The first power supply circuit further includes: a first switching circuit; the second power supply circuit further includes: a second switching circuit;
the first current limiting circuit is connected with the first switch circuit, and the second current limiting circuit is connected with the second switch circuit.
The first current limiting circuit comprises a first diode and a second diode; the second current limiting circuit comprises a third diode and a fourth diode;
the cathode of the first diode is electrically connected with the anode of the second diode, and the cathode of the third diode is electrically connected with the anode of the fourth diode.
The first switch circuit comprises a first battery output interface, a second battery output interface, a first triode, a first PMOS (P-channel metal oxide semiconductor) tube and a first NMOS (N-channel metal oxide semiconductor) tube;
the cathode of the first diode is electrically connected with the base of the first triode, the collector of the first triode is electrically connected with the grid of the first PMOS tube, and the drain of the first PMOS tube is electrically connected with the first battery output interface.
And the emitter of the first triode is electrically connected with the grid of the first NMOS tube, and the drain of the first NMOS tube is electrically connected with the output interface of the second battery.
The first power supply circuit further includes: a first capacitor;
one end of the first capacitor is connected with the cathode of the first diode, and the other end of the first capacitor is connected with the anode of the second diode;
the anode of the second diode is grounded.
The first power supply circuit further includes: a second capacitor and a second resistor;
one end of the second capacitor is electrically connected with the base electrode of the first triode, and the other end of the second capacitor is grounded;
one end of the second resistor is electrically connected with the base electrode of the first triode, and the other end of the second resistor is grounded.
The first power supply circuit further includes: a third resistor and a fourth resistor;
the first battery access interface is electrically connected with the collector electrode of the first triode through the third resistor and the fourth resistor in sequence;
one end of the third resistor and the grid electrode of the first PMOS tube are electrically connected with the same end of the fourth resistor;
the first battery input interface is electrically connected with the source electrode of the first PMOS tube.
The first power supply circuit further includes: a third capacitor and a fourth capacitor;
one end of the third capacitor is electrically connected with the source electrode of the first PMOS tube, and the other end of the third capacitor is electrically connected with the grid electrode of the first PMOS tube;
one end of the fourth capacitor is electrically connected with the drain electrode of the first PMOS tube, and the other end of the fourth capacitor is electrically connected with the grid electrode of the first PMOS tube.
The first power supply circuit further includes: a fifth resistor, a sixth resistor and a first voltage terminal;
one end of the fifth resistor is electrically connected with the first voltage end, and the other end of the fifth resistor is electrically connected with the sixth resistor and the grid electrode of the first NMOS tube;
one end of the sixth resistor is electrically connected with the fifth resistor, and the other end of the sixth resistor is electrically connected with the emitting electrode of the first triode; the emitting electrode of the first triode is grounded;
and the source electrode of the first NMOS tube is electrically connected with the second battery input interface.
The cathode of the first diode is electrically connected with the first voltage end; one end of the first resistor is electrically connected with the first voltage end, and the other end of the first resistor is electrically connected with the second resistor and the base electrode of the first triode.
The first power supply circuit further includes: a seventh resistor and a fifth capacitor;
one end of the seventh resistor is electrically connected with the grid electrode of the first NMOS tube, and the other end of the seventh resistor is electrically connected with the fifth capacitor and the sixth resistor;
the fifth capacitor is electrically connected with the emitter of the first triode.
The application provides a can positive reverse connect battery supply circuit includes: a first power supply circuit and a second power supply circuit; the first power supply circuit comprises a first battery input interface, a second battery input interface and a first current limiting circuit for limiting current to be conducted according to a first direction; the first battery input interface is electrically connected with the second battery input interface through a first current limiting circuit; the second power supply circuit comprises a third battery input interface, a fourth battery input interface and a second current limiting circuit for limiting current to be conducted according to a second direction; the third battery input interface is electrically connected with the fourth battery input interface through a second current limiting circuit; the first battery input interface is connected with the third battery input interface, and the second battery input interface is connected with the fourth battery input interface; when the battery is connected, the first current limiting circuit and the second current limiting circuit are alternatively conducted. When the battery is connected positively, the first current limiting circuit is conducted, and the first power supply circuit supplies power. The second current limiting circuit is turned off and the second power supply circuit does not supply power. When the battery is reversely connected, the second current limiting circuit is conducted, and the second power supply circuit supplies power. The first current limiting circuit is cut off, and the first power supply circuit does not supply power, so that power can be supplied under the condition that the battery is in positive connection or in reverse connection.
Drawings
Fig. 1 is a schematic structural diagram of a first power supply circuit according to an embodiment;
fig. 2 is a schematic structural diagram of a second power supply circuit according to an embodiment.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As used herein, the singular forms "a", "an", "the" and "the" include plural referents unless the content clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, modules, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any module and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In one embodiment, the first power supply circuit supplies power and the second power supply circuit does not supply power when the battery is connected positively. Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a first power supply circuit disclosed in the present application, and fig. 2 is a schematic structural diagram of a second power supply circuit disclosed in the present application. Reversible battery supply circuit includes: a first power supply circuit and a second power supply circuit;
the first power supply circuit comprises a first battery input interface, a second battery input interface and a first current limiting circuit used for limiting current to be conducted according to a first direction;
the first battery input interface is electrically connected with the second battery input interface through the first current limiting circuit;
the second power supply circuit comprises a third battery input interface, a fourth battery input interface and a second current limiting circuit used for limiting current to be conducted according to a second direction;
the third battery input interface is electrically connected with the fourth battery input interface through the second current limiting circuit;
the first battery input interface is connected with the third battery input interface, and the second battery input interface is connected with the fourth battery input interface;
when the battery is connected, the first current limiting circuit and the second current limiting circuit are alternatively conducted.
As described above, the reversible battery power supply circuit includes: a first power supply circuit and a second power supply circuit; the first power supply circuit comprises a first battery input interface, a second battery input interface and a first current limiting circuit used for limiting current to be conducted according to a first direction; the first battery input interface is electrically connected with the second battery input interface through a first current limiting circuit; the second power supply circuit comprises a third battery input interface, a fourth battery input interface and a second current limiting circuit used for limiting current to be conducted according to a second direction; the third battery input interface is electrically connected with the fourth battery input interface through a second current limiting circuit; the first battery input interface is connected with the third battery input interface, and the second battery input interface is connected with the fourth battery input interface; when the battery is connected, the first current limiting circuit and the second current limiting circuit are selected to be conducted. When the battery is connected positively, the first current limiting circuit is conducted, and the first power supply circuit supplies power. The second current limiting circuit is turned off and the second power supply circuit does not supply power. When the battery is reversely connected, the second current limiting circuit is conducted, and the second power supply circuit supplies power. The first current limiting circuit is cut off, and the first power supply circuit does not supply power, so that power can be supplied under the condition that the battery is in positive connection or in reverse connection.
In one embodiment, the first power supply circuit further comprises: a first switching circuit; the second power supply circuit further includes: a second switching circuit;
the first current limiting circuit is connected with the first switch circuit, and the second current limiting circuit is connected with the second switch circuit.
The first switch circuit and the second switch circuit have the same structure, the third battery input interface and the first battery input interface are connected with the positive electrode of the battery, and the fourth battery input interface and the second battery input interface are connected with the negative electrode of the battery.
As described above, the first power supply circuit further includes: a first switching circuit; the second power supply circuit further includes: a second switching circuit; the first current limiting circuit is connected with the first switch circuit, and the second current limiting circuit is connected with the second switch circuit. The first current limiting circuit is used for controlling the connection and disconnection of the first power supply circuit, and the second current limiting circuit is used for controlling the connection and disconnection of the second power supply circuit.
In one embodiment, the first current limiting circuit includes a first diode D1 and a second diode D2; the second current limiting circuit comprises a third diode D3 and a fourth diode D4;
the cathode of the first diode D1 is electrically connected to the anode of the second diode D2, and the cathode of the third diode D3 is electrically connected to the anode of the fourth diode D4.
As described above, the cathode of the first diode D1 is electrically connected to the anode of the second diode D2, and the cathode of the third diode D3 is electrically connected to the anode of the fourth diode D4. When the first diode D1 and the second diode D2 are both turned on, the first current limiting circuit is turned on. When the third diode D3 and the fourth diode D4 are both turned on, the second current limiting circuit is turned on.
In one embodiment, the first switch circuit includes a first battery output interface, a second battery output interface, a first triode K1, a first PMOS transistor Q1, and a first NMOS transistor Q2;
the cathode of the first diode D1 is electrically connected with the base of the first triode K1, the collector of the first triode K1 is electrically connected with the grid G of the first PMOS tube Q1, and the drain D of the first PMOS tube Q1 is electrically connected with the first battery output interface.
As described above, when the first diode D1 and the second diode D2 of the first power supply circuit are turned on, the first transistor K1 is turned on, so that the first PMOS transistor Q1 is turned on.
In one embodiment, the emitter E of the first transistor K1 is electrically connected to the gate G of the first NMOS transistor Q2, and the drain D of the first NMOS transistor Q2 is electrically connected to the second battery output interface.
As described above, when the first transistor K1 is turned on, the first NMOS transistor Q2 is turned on.
In one embodiment, the first power supply circuit further includes: a first capacitor C1;
one end of the first capacitor C1 is connected with the cathode of the first diode D1, and the other end of the first capacitor C1 is connected with the anode of the second diode D2;
the anode of the second diode D2 is grounded.
As mentioned above, when the first battery input interface is connected to the positive electrode of the battery and the second battery input interface is connected to the negative electrode of the battery, the first diode D1 and the second diode D2 are turned on. Set up first electric capacity C1 between first diode D1 and ground, can filter the alternating current signal in the battery input, remain direct current signal for opening and closing of first triode K1 is more stable.
In one embodiment, the first power supply circuit further includes: a second capacitor C2 and a second resistor R2;
one end of the second capacitor C2 is electrically connected with the base electrode B of the first triode K1, and the other end of the second capacitor C2 is grounded;
one end of the second resistor R2 is electrically connected with the base B of the first triode K1, and the other end of the second resistor R2 is grounded.
As described above, when the first triode K1 is turned on, ripples are generated, and the second capacitor C2 can filter out the ripples, thereby protecting the first triode K1.
In one embodiment, the first power supply circuit further includes: a third resistor R3 and a fourth resistor R4;
the first battery access interface is electrically connected with the collector electrode E of the first triode K1 through the third resistor R3 and the fourth resistor R4 in sequence;
one end of the third resistor R3 and the grid G of the first PMOS tube Q1 are electrically connected with the same end of the fourth resistor R4.
The first battery input interface is electrically connected with the source S of the first PMOS tube Q1.
As described above, when the first transistor K1 is turned on, the gate G of the first PMOS transistor Q1 is pulled low due to the voltage dividing effect of the third resistor R3 and the fourth resistor R4. The source electrode S of the first PMOS tube Q1 is electrically connected with the first battery input interface, and the source electrode S of the first PMOS tube Q1 is at a high level. The voltage difference between the grid G and the source S of the first PMOS tube Q1 exceeds the voltage difference threshold value between the grid G and the source S of the first PMOS tube Q1, and the first PMOS tube Q1 is conducted.
In one embodiment, the first power supply circuit further includes: a third capacitor C3 and a fourth capacitor C4;
one end of the third capacitor C3 is electrically connected to the source S of the first PMOS transistor Q1, and the other end of the third capacitor C3 is electrically connected to the gate G of the first PMOS transistor Q1;
one end of the fourth capacitor C4 is electrically connected to the drain D of the first PMOS transistor Q1, and the other end of the fourth capacitor C4 is electrically connected to the gate G of the first PMOS transistor Q1.
As described above, the third capacitor C3 and the fourth capacitor C4 can protect the first PMOS transistor Q1.
In one embodiment, the first power supply circuit further includes: a fifth resistor R5, a sixth resistor R6 and a first voltage end V1;
one end of the fifth resistor R5 is electrically connected to the first voltage terminal V1, and the other end of the fifth resistor R5 is electrically connected to the sixth resistor R6 and the gate G of the first NMOS transistor Q2; the voltage of the first voltage terminal V1 is the voltage of the first battery input interface after passing through the first diode D1.
One end of the sixth resistor R6 is electrically connected to the fifth resistor R5, and the other end of the sixth resistor R6 is electrically connected to the emitter E of the first triode K1; an emitter E of the first triode K1 is grounded;
and the source S of the first NMOS tube Q2 is electrically connected with the second battery input interface.
The fifth resistor R5 and the sixth resistor R6 divide the voltage of the first voltage terminal V1, so that the gate G of the first NMOS transistor Q2 is at a high level. The source electrode S of the first NMOS tube Q2 is electrically connected with the second battery input interface, the source electrode S of the first NMOS tube Q2 is at a low level, and the first NMOS tube Q2 is conducted.
As described above, after the first PMOS transistor Q1 and the first NMOS transistor Q2 are both turned on, the first battery input interface is electrically connected to the first battery output interface, and the second battery input interface is electrically connected to the second battery output interface, so that the battery can supply power to the external circuit.
In one embodiment, the cathode of the first diode D1 is electrically connected to the first voltage terminal V1; one end of a first resistor R1 is electrically connected with the first voltage end V1, and the other end of the first resistor R1 is electrically connected with the second resistor R2 and the base B of the first triode K1.
The first voltage end V1 is divided through the first resistor R1 and the second resistor R2, so that the voltage between the level of the base B of the first triode K1 and the collector E of the first triode K1 is greater than the voltage threshold between the base B of the first triode K1 and the collector E, and the first triode K1 is conducted.
Illustratively, the first battery input interface is connected to the positive electrode of the battery, the voltage of the first battery input interface is +9V, the voltage drops by 0.3V through the first diode D1, and the voltage of the first voltage terminal V1 is +8.7V at this time. The second resistor R2 is electrically connected to the second battery input interface through the second diode D2, and the second battery input interface is connected to the battery cathode. The voltage generated by the second diode D2 drops to 0.3V, so the voltage at the two ends of the first resistor R1, which are not connected to the second resistor R2, is +8.4V. The resistance values of the first resistor R1 and the second resistor R2 are the same, the potential between the first resistor R1 and the second resistor R2 is +4.2V, the potential of the base B of the first triode K1 is also +4.2V, and the first triode K1 is conducted.
As described above, the first voltage terminal V1 is divided by the first resistor R1 and the second resistor R2, so that the voltage between the level of the base B of the first transistor K1 and the collector E of the first transistor K1 is greater than the voltage threshold between the base B and the collector E of the first transistor K1, and the first transistor K1 is turned on.
In one embodiment, the first power supply circuit further includes: a seventh resistor R7 and a fifth capacitor C5;
one end of the seventh resistor R7 is electrically connected to the gate G of the first NMOS transistor Q2, and the other end of the seventh resistor R7 is electrically connected to the fifth capacitor C5 and the sixth resistor R6;
the fifth capacitor C5 is electrically connected with the emitter E of the first triode K1;
the seventh resistor R7 can play a role of current limiting on the gate G of the first NMOS transistor Q2, thereby protecting the first NMOS transistor.
The fifth capacitor C5 is capable of filtering the ac signal at the first voltage terminal V1.
As described above, the seventh resistor R7 can perform a current limiting function on the gate G of the first NMOS transistor Q2, thereby protecting the first NMOS transistor. The fifth capacitor C5 is capable of filtering the ac signal at the first voltage terminal V1.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, apparatus, article, or method that comprises the element.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields will be covered by the scope of the present invention.
Claims (12)
1. A reversible battery supply circuit, comprising: a first power supply circuit and a second power supply circuit;
the first power supply circuit comprises a first battery input interface, a second battery input interface and a first current limiting circuit used for limiting current to be conducted according to a first direction;
the first battery input interface is electrically connected with the second battery input interface through the first current limiting circuit;
the second power supply circuit comprises a third battery input interface, a fourth battery input interface and a second current limiting circuit for limiting current to be conducted according to a second direction;
the third battery input interface is electrically connected with the fourth battery input interface through the second current limiting circuit;
the first battery input interface is connected with the third battery input interface, and the second battery input interface is connected with the fourth battery input interface;
when the battery is connected, the first current limiting circuit and the second current limiting circuit are alternatively conducted.
2. The reversible battery supply circuit of claim 1, wherein the first supply circuit further comprises: a first switching circuit; the second power supply circuit further includes: a second switching circuit;
the first current limiting circuit is connected with the first switch circuit, and the second current limiting circuit is connected with the second switch circuit;
wherein the first switch circuit and the second switch circuit have the same structure.
3. The reversible battery power supply circuit of claim 2, wherein said first current limiting circuit comprises a first diode and a second diode; the second current limiting circuit comprises a third diode and a fourth diode;
the cathode of the first diode is electrically connected with the anode of the second diode, and the cathode of the third diode is electrically connected with the anode of the fourth diode.
4. The reversible battery power supply circuit of claim 3, wherein the first switching circuit comprises a first battery output interface, a second battery output interface, a first triode, a first PMOS transistor, and a first NMOS transistor;
the cathode of the first diode is electrically connected with the base of the first triode, the collector of the first triode is electrically connected with the grid of the first PMOS tube, and the drain of the first PMOS tube is electrically connected with the first battery output interface.
5. The reversible battery supply circuit of claim 4, wherein an emitter of the first transistor is electrically connected to a gate of the first NMOS transistor, and a drain of the first NMOS transistor is electrically connected to the second battery output interface.
6. The reversible battery supply circuit of claim 4, wherein the first supply circuit further comprises: a first capacitor;
one end of the first capacitor is connected with the cathode of the first diode, and the other end of the first capacitor is connected with the anode of the second diode;
the anode of the second diode is grounded.
7. The reversible battery supply circuit of claim 4, wherein the first supply circuit further comprises: a second capacitor and a second resistor;
one end of the second capacitor is electrically connected with the base electrode of the first triode, and the other end of the second capacitor is grounded;
one end of the second resistor is electrically connected with the base electrode of the first triode, and the other end of the second resistor is grounded.
8. The reversible battery supply circuit of claim 4, wherein the first supply circuit further comprises: a third resistor and a fourth resistor;
the first battery access interface is electrically connected with the collector electrode of the first triode through the third resistor and the fourth resistor in sequence;
one end of the third resistor and the grid electrode of the first PMOS tube are electrically connected with the same end of the fourth resistor;
the first battery input interface is electrically connected with the source electrode of the first PMOS tube.
9. The reversible battery supply circuit of claim 4, wherein the first supply circuit further comprises: a third capacitor and a fourth capacitor;
one end of the third capacitor is electrically connected with the source electrode of the first PMOS tube, and the other end of the third capacitor is electrically connected with the grid electrode of the first PMOS tube;
one end of the fourth capacitor is electrically connected with the drain electrode of the first PMOS tube, and the other end of the fourth capacitor is electrically connected with the grid electrode of the first PMOS tube.
10. The reversible battery supply circuit of claim 7, wherein the first supply circuit further comprises: a fifth resistor, a sixth resistor and a first voltage terminal;
one end of the fifth resistor is electrically connected with the first voltage end, and the other end of the fifth resistor is electrically connected with the sixth resistor and the grid electrode of the first NMOS tube;
one end of the sixth resistor is electrically connected with the fifth resistor, and the other end of the sixth resistor is electrically connected with the emitting electrode of the first triode; the emitting electrode of the first triode is grounded;
and the source electrode of the first NMOS tube is electrically connected with the second battery input interface.
11. The reversible battery supply circuit of claim 10, wherein a cathode of said first diode is electrically connected to said first voltage terminal; one end of the first resistor is electrically connected with the first voltage end, and the other end of the first resistor is electrically connected with the second resistor and the base electrode of the first triode.
12. The reversible battery supply circuit of claim 10, wherein the first supply circuit further comprises: a seventh resistor and a fifth capacitor;
one end of the seventh resistor is electrically connected with the grid electrode of the first NMOS tube, and the other end of the seventh resistor is electrically connected with the fifth capacitor and the sixth resistor;
the fifth capacitor is electrically connected with the emitter of the first triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222227472.3U CN218386861U (en) | 2022-08-23 | 2022-08-23 | Power supply circuit capable of being connected with battery in positive and negative directions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222227472.3U CN218386861U (en) | 2022-08-23 | 2022-08-23 | Power supply circuit capable of being connected with battery in positive and negative directions |
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| Publication Number | Publication Date |
|---|---|
| CN218386861U true CN218386861U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222227472.3U Active CN218386861U (en) | 2022-08-23 | 2022-08-23 | Power supply circuit capable of being connected with battery in positive and negative directions |
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| Country | Link |
|---|---|
| CN (1) | CN218386861U (en) |
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- 2022-08-23 CN CN202222227472.3U patent/CN218386861U/en active Active
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