CN218415889U - Battery charging protection circuit and lithium battery - Google Patents
Battery charging protection circuit and lithium battery Download PDFInfo
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- CN218415889U CN218415889U CN202222663963.2U CN202222663963U CN218415889U CN 218415889 U CN218415889 U CN 218415889U CN 202222663963 U CN202222663963 U CN 202222663963U CN 218415889 U CN218415889 U CN 218415889U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a battery charging protection circuit and a lithium battery. The battery charging protection circuit comprises a protection output circuit and a charging protection circuit; the protection output circuit comprises a protection output diode and a protection output voltage-regulator tube; the charging protection circuit comprises a first electronic switching tube and a second electronic switching tube, wherein the control end of the first electronic switching tube is connected with the anode of the protection output diode; and the control end of the second electronic switching tube is connected with the cathode of the protection output diode. When the charger is not charged, the control end of the battery protector controls the first electronic switch tube and the second electronic switch tube to be turned off, so that a current loop between the charging end of the charger and the charging end of the battery is disconnected, the battery and the charging end are conveniently blocked, the probability that the battery cannot discharge through the charging end of the charger is effectively reduced, the charging safety of a charging interface is effectively improved, and the discharging of the charging interface of the charger when the charger is not charged is effectively avoided.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery charging protection circuit and lithium cell.
Background
In the lithium battery protection circuit of conventional design at present, the protection device is charged as to the protection circuit that charges for single level MOS, for example, the drive of the MOS that charges of conventional BMS protection shield at present is all by the high level of the constant output of chip direct drive, and the MOS pipe that charges is in normally open state, and only one-level MOS that charges is as the protection device that charges in charging circuit moreover.
However, when the conventional battery protection circuit is not charged, the charging port can still measure the voltage, and the charging port can also discharge, so that the risk of sparking exists, the interface of the device is easily damaged, and the interface is in poor contact, so that the potential safety hazard is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, providing a battery charging protection circuit and lithium cell that effectively improves the charging security of the interface that charges.
The purpose of the utility model is realized through the following technical scheme:
a battery charge protection circuit comprising: a protection output circuit and a charging protection circuit; the protection output circuit comprises a protection output diode and a protection output voltage-stabilizing tube, wherein the anode of the protection output diode is used for being connected with the control end of the battery protector, and the cathode of the protection output diode is connected with the anode of the protection output voltage-stabilizing tube; the charging protection circuit comprises a first electronic switching tube and a second electronic switching tube, wherein the first end of the first electronic switching tube is used for being connected with the charging end of a charger, the control end of the first electronic switching tube is connected with the anode of the protection output diode, and the second end of the first electronic switching tube is connected with the cathode of the protection output voltage regulator tube; the first end of the second electronic switch tube is used for being connected with the charging end of a battery, the control end of the second electronic switch tube is connected with the negative electrode of the protection output diode, and the second end of the second electronic switch tube is connected with the negative electrode of the protection output voltage-stabilizing tube.
In one embodiment, the protection output circuit further includes a third electronic switching tube, a second end of the third electronic switching tube is connected to a negative electrode of the protection output diode, a first end of the third electronic switching tube is connected to a negative electrode of the protection output voltage regulator tube, and a control end of the third electronic switching tube is connected to a positive electrode of the protection output diode.
In one embodiment, the first electronic switching tube and the second electronic switching tube are both N-type MOS tubes, and the third electronic switching tube is a PNP-type triode.
In one embodiment, the protection output circuit further includes a first resistor, a first end of the first resistor is connected to the control end of the third electronic switch tube, and a second end of the first resistor is connected to a negative electrode of the protection output regulator tube.
In one embodiment, the first resistor is an adjustable resistor.
In one embodiment, the charging protection circuit further includes a second resistor, an anode of the protection output diode is connected to a first end of the second resistor, and a second end of the second resistor is connected to the control end of the first electronic switching tube.
In one embodiment, the charging protection circuit further includes a third resistor, a cathode of the protection output diode is connected to a first end of the third resistor, and a second end of the third resistor is connected to the control end of the second electronic switch tube.
In one embodiment, the charging protection circuit further includes a first capacitor, a first end of the second electronic switch tube is connected to a first end of the first capacitor, and a second end of the first capacitor is connected to a second end of the second electronic switch tube.
In one embodiment, the charging protection circuit further includes a second capacitor, a first end of the first electronic switch tube is connected to a first end of the second capacitor, and a second end of the second capacitor is connected to a second end of the first electronic switch tube.
A lithium battery comprising the battery charging protection circuit of any of the above embodiments.
Compared with the prior art, the utility model discloses at least, following advantage has:
when the charger is not charged, the control end of the battery protector controls the first electronic switch tube and the second electronic switch tube to be switched off, so that a current loop between the charging end of the charger and the charging end of the battery is disconnected, the battery and the charging end are conveniently blocked, the probability that the battery cannot discharge through the charging end of the charger is effectively reduced, the charging safety of a charging interface is effectively improved, and the discharging of the charging interface of the charger when the charger is not charged is effectively avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram of a battery charging protection circuit according to an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are illustrated in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to a battery charging protection circuit. In one embodiment, the battery charging protection circuit comprises a protection output circuit and a charging protection circuit. The protection output circuit comprises a protection output diode and a protection output voltage-regulator tube. The anode of the protection output diode is used for being connected with the control end of the battery protector, and the cathode of the protection output diode is connected with the anode of the protection output voltage-stabilizing tube. The charging protection circuit comprises a first electronic switching tube and a second electronic switching tube. The first end of the first electronic switch tube is used for being connected with a charging end of a charger, the control end of the first electronic switch tube is connected with the anode of the protection output diode, and the second end of the first electronic switch tube is connected with the cathode of the protection output voltage regulator tube. The first end of the second electronic switch tube is used for being connected with the charging end of a battery, the control end of the second electronic switch tube is connected with the negative electrode of the protection output diode, and the second end of the second electronic switch tube is connected with the negative electrode of the protection output voltage regulator tube. When the charger is not charged, the control end of the battery protector controls the first electronic switch tube and the second electronic switch tube to be switched off, so that a current loop between the charging end of the charger and the charging end of the battery is disconnected, the battery and the charging end are conveniently blocked, the probability that the battery cannot discharge through the charging end of the charger is effectively reduced, the charging safety of a charging interface is effectively improved, and the discharging of the charging interface of the charger when the charger is not charged is effectively avoided.
Please refer to fig. 1, which is a circuit diagram of a battery charging protection circuit according to an embodiment of the present invention.
The battery charging protection circuit 10 of an embodiment includes a protection output circuit and a charging protection circuit. The protection output circuit comprises a protection output diode D1 and a protection output voltage-regulator tube DZ1. The anode of the protection output diode D1 is used for being connected with the control end CHG of the battery protector, and the cathode GC of the protection output diode D1 is connected with the anode of the protection output voltage regulator tube DZ1. The charging protection circuit comprises a first electronic switching tube QC1 and a second electronic switching tube QC2. The first end of the first electronic switch tube QC1 is used for being connected with a charging end C-of a charger, the control end of the first electronic switch tube QC1 is connected with the anode of the protection output diode D1, and the second end of the first electronic switch tube QC1 is connected with the cathode of the protection output voltage regulator DZ1. The first end of the second electronic switch tube QC2 is used for being connected with a charging end B-of a battery, the control end of the second electronic switch tube QC2 is connected with the negative electrode of the protection output diode D1, and the second end of the second electronic switch tube QC2 is connected with the negative electrode of the protection output voltage regulator tube DZ1.
In this embodiment, when the battery is not charged, the control terminal CHG of the battery protector controls the first electronic switching tube QC1 and the second electronic switching tube QC2 to turn off, so that a current loop between the charging terminal C-of the charger and the charging terminal B-of the battery is disconnected, the battery and the charging terminal are conveniently blocked, the probability that the battery cannot discharge through the charging terminal C-of the charger is effectively reduced, the charging safety of the charging interface is effectively improved, and the discharging of the charging interface of the charger when the battery is not charged is effectively avoided. The protection output regulator tube DZ1 is used for stabilizing the voltage between the second ends and the control ends of the first electronic switch tube QC1 and the second electronic switch tube QC2.
In one embodiment, referring to fig. 1, the protection output circuit further includes a third electronic switch tube Q12, a second end of the third electronic switch tube Q12 is connected to a negative electrode of the protection output diode D1, a first end of the third electronic switch tube Q12 is connected to a negative electrode of the protection output voltage regulator tube DZ1, and a control end of the third electronic switch tube Q12 is connected to a positive electrode of the protection output diode D1. In this embodiment, the first end of the third electronic switch Q12 is connected to the control end of the second electronic switch QC2, and the second end of the third electronic switch Q12 is connected to the second end of the second electronic switch QC2, so that the third electronic switch Q12 is connected in parallel between the control end and the second end of the second electronic switch QC2, so that the third electronic switch Q12 is used as a discharge electron tube of the second electronic switch QC2, specifically, when the third electronic switch Q12 is turned on, the second electronic switch QC2 is turned off, and the third electronic switch Q12 quickly discharges the voltage between the control end and the second end of the second electronic switch QC2, so that the second electronic switch QC2 is quickly turned off, and the response speed of the second electronic switch QC2 is improved.
In another embodiment, the first electronic switching tube QC1 and the second electronic switching tube QC2 are both N-type MOS tubes, the first end of the first electronic switching tube QC1 and the first end of the second electronic switching tube QC2 are drains of the N-type MOS tubes, the second end of the first electronic switching tube QC1 and the second end of the second electronic switching tube QC2 are sources of the N-type MOS tubes, and the control end of the first electronic switching tube QC1 and the control end of the second electronic switching tube QC2 are gates of the N-type MOS tubes; the third electronic switch tube Q12 is a PNP-type triode, the first end of the third electronic switch tube Q12 is a collector of the PNP-type triode, the second end of the third electronic switch tube Q12 is an emitter of the PNP-type triode, and the control end of the third electronic switch tube Q12 is a base of the PNP-type triode. When the control end CHG of the battery protector outputs a low level, the third electronic switching tube Q12 is turned on, the first electronic switching tube QC1 and the second electronic switching tube QC2 are both turned off, and the third electronic switching tube Q12 rapidly discharges the voltage between the gate and the source of the second electronic switching tube QC2, so that the second electronic switching tube QC2 rapidly enters a cut-off state.
Further, the protection output circuit further comprises a first resistor R1, a first end of the first resistor R1 is connected with the control end of the third electronic switch tube Q12, and a second end of the first resistor R1 is connected with the negative electrode of the protection output voltage regulator tube DZ1. In this embodiment, the first resistor R1 is connected in parallel between the control end of the third electronic switching tube Q12 and the first end of the third electronic switching tube Q12, and the first resistor R1 is used as a bleeding resistor of the third electronic switching tube Q12 to adjust a bleeding speed of the third electronic switching tube Q12. In another embodiment, the first resistor R1 is an adjustable resistor, and the discharge speed of the third electronic switch Q12 can be easily changed by adjusting the resistance of the first resistor R1.
In one embodiment, referring to fig. 1, the charging protection circuit further includes a second resistor RC1, an anode of the protection output diode D1 is connected to a first end of the second resistor RC1, and a second end of the second resistor RC1 is connected to a control end of the first electronic switching tube QC 1. In this embodiment, the second resistor RC1 is connected in series to the control end of the first electronic switching tube QC1, and the second resistor RC1 limits the control current output by the control end CHG of the battery protector, so as to avoid an excessive current at the control end of the first electronic switching tube QC1, and ensure accurate operation of the first electronic switching tube QC 1.
In one embodiment, referring to fig. 1, the charging protection circuit further includes a third resistor RC2, a cathode of the protection output diode D1 is connected to a first end of the third resistor RC2, and a second end of the third resistor RC2 is connected to a control end of the second electronic switching tube QC2. In this embodiment, the third resistor RC2 is connected in series to the control end of the second electronic switching tube QC2, and the third resistor RC2 limits the control current output by the control end CHG of the battery protector, so as to avoid an excessive current at the control end of the second electronic switching tube QC2, and ensure accurate operation of the second electronic switching tube QC2.
In one embodiment, referring to fig. 1, the charging protection circuit further includes a first capacitor C1, a first end of the second electronic switch QC2 is connected to the first end of the first capacitor C1, and a second end of the first capacitor C1 is connected to the second end of the second electronic switch QC2. In this embodiment, the first capacitor C1 is connected in parallel between the first end and the second end of the second electronic switching tube QC2, and the first capacitor C1 absorbs a peak voltage of the second electronic switching tube QC2 when the second electronic switching tube QC2 is turned on, so as to absorb an instantaneous high voltage, thereby preventing the second electronic switching tube QC2 from being damaged.
In one embodiment, referring to fig. 1, the charging protection circuit further includes a second capacitor C3, a first end of the first electronic switch QC1 is connected to a first end of the second capacitor C3, and a second end of the second capacitor C3 is connected to a second end of the first electronic switch QC 1. In this embodiment, the second capacitor C3 is connected in parallel between the first end and the second end of the first electronic switching tube QC1, and the second capacitor C3 absorbs a peak voltage of the first electronic switching tube QC1 when the first electronic switching tube QC1 is turned on, so as to absorb an instantaneous high voltage, thereby preventing the first electronic switching tube QC1 from being damaged.
In one embodiment, the present application further provides a lithium battery including the battery charging protection circuit described in any of the above embodiments. In this embodiment, the battery charging protection circuit includes a protection output circuit and a charging protection circuit. The protection output circuit comprises a protection output diode and a protection output voltage-regulator tube. The anode of the protection output diode is used for being connected with the control end of the battery protector, and the cathode of the protection output diode is connected with the anode of the protection output voltage-stabilizing tube. The charging protection circuit comprises a first electronic switching tube and a second electronic switching tube. The first end of the first electronic switch tube is used for being connected with a charging end of a charger, the control end of the first electronic switch tube is connected with the anode of the protection output diode, and the second end of the first electronic switch tube is connected with the cathode of the protection output voltage regulator tube. The first end of the second electronic switch tube is used for being connected with the charging end of a battery, the control end of the second electronic switch tube is connected with the negative electrode of the protection output diode, and the second end of the second electronic switch tube is connected with the negative electrode of the protection output voltage-stabilizing tube. When the charger is not charged, the control end of the battery protector controls the first electronic switch tube and the second electronic switch tube to be turned off, so that a current loop between the charging end of the charger and the charging end of the battery is disconnected, the battery and the charging end are conveniently blocked, the probability that the battery cannot discharge through the charging end of the charger is effectively reduced, the charging safety of a charging interface is effectively improved, and the discharging of the charging interface of the charger when the charger is not charged is effectively avoided.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A battery charge protection circuit, comprising:
the protection output circuit comprises a protection output diode and a protection output voltage-stabilizing tube, wherein the anode of the protection output diode is used for being connected with the control end of the battery protector, and the cathode of the protection output diode is connected with the anode of the protection output voltage-stabilizing tube;
the charging protection circuit comprises a first electronic switching tube and a second electronic switching tube, wherein the first end of the first electronic switching tube is used for being connected with the charging end of a charger, the control end of the first electronic switching tube is connected with the anode of the protection output diode, and the second end of the first electronic switching tube is connected with the cathode of the protection output voltage regulator tube; the first end of the second electronic switch tube is used for being connected with the charging end of a battery, the control end of the second electronic switch tube is connected with the negative electrode of the protection output diode, and the second end of the second electronic switch tube is connected with the negative electrode of the protection output voltage-stabilizing tube.
2. The battery charging protection circuit of claim 1, wherein the protection output circuit further comprises a third electronic switching tube, a second end of the third electronic switching tube is connected to a negative electrode of the protection output diode, a first end of the third electronic switching tube is connected to a negative electrode of the protection output voltage regulator tube, and a control end of the third electronic switching tube is connected to a positive electrode of the protection output diode.
3. The battery charging protection circuit of claim 2, wherein the first electronic switching tube and the second electronic switching tube are both N-type MOS tubes, and the third electronic switching tube is a PNP-type triode.
4. The battery charging protection circuit of claim 2, wherein the protection output circuit further comprises a first resistor, a first end of the first resistor is connected to the control end of the third electronic switching tube, and a second end of the first resistor is connected to the negative electrode of the protection output voltage regulator tube.
5. The battery charge protection circuit of claim 4, wherein the first resistor is an adjustable resistor.
6. The battery charging protection circuit of claim 1, further comprising a second resistor, wherein an anode of the protection output diode is connected to a first terminal of the second resistor, and a second terminal of the second resistor is connected to the control terminal of the first electronic switching tube.
7. The battery charging protection circuit of claim 1, further comprising a third resistor, wherein a cathode of the protection output diode is connected to a first terminal of the third resistor, and a second terminal of the third resistor is connected to the control terminal of the second electronic switching tube.
8. The battery charging protection circuit of claim 1, further comprising a first capacitor, wherein a first terminal of the second electronic switch is connected to a first terminal of the first capacitor, and a second terminal of the first capacitor is connected to a second terminal of the second electronic switch.
9. The battery charging protection circuit of claim 1, further comprising a second capacitor, wherein a first terminal of the first electronic switch tube is connected to a first terminal of the second capacitor, and a second terminal of the second capacitor is connected to a second terminal of the first electronic switch tube.
10. A lithium battery comprising the battery charge protection circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222663963.2U CN218415889U (en) | 2022-10-10 | 2022-10-10 | Battery charging protection circuit and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222663963.2U CN218415889U (en) | 2022-10-10 | 2022-10-10 | Battery charging protection circuit and lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218415889U true CN218415889U (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222663963.2U Active CN218415889U (en) | 2022-10-10 | 2022-10-10 | Battery charging protection circuit and lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218415889U (en) |
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2022
- 2022-10-10 CN CN202222663963.2U patent/CN218415889U/en active Active
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