CN217362594U - Positive end protection drive control circuit of lithium battery protection board - Google Patents
Positive end protection drive control circuit of lithium battery protection board Download PDFInfo
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- CN217362594U CN217362594U CN202122988964.XU CN202122988964U CN217362594U CN 217362594 U CN217362594 U CN 217362594U CN 202122988964 U CN202122988964 U CN 202122988964U CN 217362594 U CN217362594 U CN 217362594U
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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
Abstract
The utility model discloses a positive end protection drive control circuit of lithium battery protection shield, include: the device comprises a charge pump circuit, a protective plate positive end driving circuit and a charging voltage acquisition circuit; the charge pump circuit is connected with the protection board positive end drive circuit and the lithium battery; the protection plate positive end driving circuit is connected with the charge pump circuit, the charging voltage acquisition circuit and the lithium battery; and the charging voltage acquisition circuit is connected with the charge pump circuit and the protection plate positive end drive circuit. This application can possess higher flexibility when providing protect function, can change corresponding component and need not whole change according to the demand, and the circuit supports soft start, and starting current is little, has improved the life of components and parts when guaranteeing that the product quality is stable, and the static characteristic of transistor can be optimized to the direct current bias voltage who introduces in the circuit.
Description
Technical Field
The utility model relates to the technical field of circuits, especially, relate to a positive end protection drive control circuit of lithium battery protection shield.
Background
The method adopted by the positive end of the lithium battery protection board in the prior art is to use an integrated IC with a specific protection function, and the purpose of protection is achieved by closing the corresponding function when the lithium battery is overcharged, overdischarged or overcurrent. However, the function of this method is relatively fixed, and it is difficult to make corresponding adjustment according to specific requirements. When new requirements exist, peripheral circuits are often difficult to change, or the functions of the IC are limited and cannot meet the requirements. This can result in the original protective plate not meeting new requirements, even in the case that the whole scheme is pushed to come. In addition, when a part of the circuits inside the integrated IC is broken or damaged, the whole IC needs to be replaced, which greatly increases the time and money cost in the use process.
Accordingly, there is a need for improvement in the art.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem who solves is: the utility model provides a lithium battery protection board positive terminal protection drive control circuit to solve the problem that exists among the prior art.
According to the utility model discloses an aspect of the embodiment discloses a positive end protection drive control circuit of lithium battery protection board, include:
the charging circuit comprises a charge pump circuit, a protective plate positive end driving circuit and a charging voltage acquisition circuit;
the charge pump circuit is connected with the protection board positive end drive circuit and the lithium battery, and is used for boosting the voltage of the protection board positive end drive circuit;
the protection plate positive end driving circuit is connected with the charge pump circuit, the charging voltage acquisition circuit and the lithium battery and is used for stopping charging after receiving a charging closing signal when the lithium battery is in an overcharged state, and stopping discharging after receiving a discharging closing signal when the lithium battery is in an overdischarged state;
the charging voltage acquisition circuit is connected with the charge pump circuit and the protection plate positive end driving circuit and used for detecting the charging voltage of the lithium battery.
In another embodiment, the protection board positive side driver circuit comprises:
the power supply comprises a first MOS tube, a second MOS tube, a third MOS tube, a protection circuit, a fifth MOS tube, a sixth MOS tube, a seventh MOS tube, an eighth MOS tube, a ninth MOS tube, a tenth MOS tube, a first control signal port, a second control signal port, a third control signal port and a first power supply output end;
the first MOS tube is connected with the second MOS tube, the protection circuit, the fifth MOS tube, the seventh MOS tube and the lithium battery;
the second MOS tube is connected with the third MOS tube and the seventh MOS tube;
the third MOS tube is connected with the ninth MOS tube, the tenth MOS tube and the first power supply output end;
the fifth MOS tube is connected with the sixth MOS tube, the seventh MOS tube, the tenth MOS tube and the charge pump circuit;
the seventh MOS tube is connected with the eighth MOS tube;
the sixth MOS tube is connected with the eighth MOS tube;
the sixth MOS tube and the eighth MOS tube are connected with the first control signal port;
the ninth MOS tube is connected with the tenth MOS tube and a third control signal port;
the protection circuit is connected with the second control signal port;
and the first control signal port is connected with the sixth MOS tube and the eighth MOS tube.
In another embodiment, the protection circuit includes: the fourth MOS tube, the first resistor, the second resistor and the third resistor;
the first resistor is connected with the drain electrode of the fourth MOS tube, the second resistor is connected with the grid electrode of the fourth MOS tube, and the third resistor is connected with the grid electrode and the source electrode of the fourth MOS tube;
the second resistor is connected with the second control signal port.
In another embodiment, the charge voltage acquisition circuit includes: the voltage stabilizing circuit, the eleventh MOS tube, the twelfth MOS tube, the fourth control signal port and the fifth control signal port;
the voltage stabilizing circuit is connected with the charge pump circuit, the fourth control signal port and the eleventh MOS tube;
the eleventh MOS tube is connected with the twelfth MOS tube;
and the twelfth MOS tube is connected with the fifth control signal port.
In another embodiment, the voltage stabilizing circuit comprises a first voltage stabilizing diode, a fourth resistor, a fifth resistor, a first diode and a second diode;
one end of the voltage stabilizing diode is connected with the fourth resistor and the first diode, and the other end of the voltage stabilizing diode is grounded;
the fourth resistor is connected with the fourth control signal port through the fifth resistor;
the first diode is connected with the charge pump circuit through the second diode.
In another embodiment, a fuse is disposed between the protection board positive side drive circuit and the lithium battery.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model discloses a lithium battery protection board positive end protection drive control circuit passes through charge pump circuit, protection board positive end drive circuit, charging voltage acquisition circuit; the charge pump circuit is connected with the protection board positive end drive circuit and the lithium battery; the protection plate positive end driving circuit is connected with the charge pump circuit, the charging voltage acquisition circuit and the lithium battery; the charging voltage acquisition circuit is connected with the charge pump circuit and the protection plate positive end drive circuit. This application can possess higher flexibility when providing protect function, can change corresponding component and need not the overall change according to the demand, and the circuit supports soft start, and starting current is little, has improved the life of components and parts when guaranteeing that the product quality is stable, and the static characteristic of transistor can be optimized to the direct current bias voltage who introduces in the circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a lithium battery protection board positive end protection driving control circuit according to the present invention;
fig. 2 is a circuit diagram of one embodiment of a charge pump circuit of the present invention;
fig. 3 is a circuit diagram of one embodiment of the protection board positive side drive circuit of the present invention;
fig. 4 is a circuit diagram of an embodiment of the charging voltage acquisition circuit of the present invention.
In the figure, a charge pump circuit 2, a protection board positive end driving circuit 3 and a charging voltage acquisition circuit 4 are adopted.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The following describes the lithium battery protection board positive end protection driving control circuit in more detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1 and fig. 1, the lithium battery protection board positive terminal protection drive control circuit of this embodiment includes:
the device comprises a charge pump circuit 2, a protective plate positive end drive circuit 3 and a charging voltage acquisition circuit 4;
the charge pump circuit 2 is connected with the protection board positive end drive circuit 3 and the lithium battery, and the charge pump circuit 2 is used for boosting the voltage of the protection board positive end drive circuit 3;
the protection plate positive end driving circuit 3 is connected with the charge pump circuit 2, the charging voltage acquisition circuit 4 and the lithium battery, and is used for stopping charging after the protection plate positive end driving circuit 3 receives a discharge closing signal when the lithium battery is in an overcharged state, and stopping discharging after the protection plate positive end driving circuit 3 receives the discharge closing signal when the lithium battery is in an overdischarged state;
the charging voltage acquisition circuit 4 is connected with the charge pump circuit 2 and the protection plate positive end drive circuit 3 and is used for detecting the charging voltage of the lithium battery.
As shown in fig. 3, the protection board positive terminal drive circuit 3 includes:
a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a protection circuit U1, a fifth MOS transistor Q12, a sixth MOS transistor Q14, a seventh MOS transistor Q10, an eighth MOS transistor Q15, a ninth MOS transistor Q17, a tenth MOS transistor Q13, a first control signal port CHG, a second control signal port CO2, a third control signal port DSG, and a first power output terminal P +;
the first MOS tube Q1 is connected with the second MOS tube Q2, the protection circuit U1, the fifth MOS tube Q12, the seventh MOS tube Q10 and the lithium battery;
the second MOS transistor Q2 is connected with the third MOS transistor Q3 and the seventh MOS transistor Q10;
the third MOS transistor Q3 is connected to the ninth MOS transistor Q17, the tenth MOS transistor Q13 and the first power output terminal P +;
the fifth MOS transistor Q12 is connected to the sixth MOS transistor Q14, the seventh MOS transistor Q10, the tenth MOS transistor Q13 and the charge pump circuit 2;
the seventh MOS transistor Q10 is connected to the eighth MOS transistor Q15;
the sixth MOS transistor Q14 is connected to the eighth MOS transistor Q15;
the sixth MOS transistor Q14 and the eighth MOS transistor Q15 are connected to the first control signal port CHG;
the ninth MOS transistor Q17 is connected to the tenth MOS transistor Q13 and a third control signal port DSG;
the protection circuit U1 is connected with the second control signal port CO 2;
the first control signal port is connected with the sixth MOS transistor Q14 and the eighth MOS transistor Q15.
The protection circuit U1 includes: a fourth MOS transistor Q8, a first resistor R14, a second resistor R18 and a third resistor R19;
the first resistor R14 is connected to the drain of the fourth MOS transistor Q8, the second resistor R18 is connected to the gate of the fourth MOS transistor Q8, and the third resistor R19 is connected to the gate and the source of the fourth MOS transistor Q8;
the second resistor R18 is connected to the second control signal port CO 2.
As shown in fig. 4, the charging voltage acquisition circuit 4 includes: the voltage stabilizing circuit U2, an eleventh MOS tube Q20, a twelfth MOS tube Q21, a fourth control signal port CH _ DET and a fifth control signal port ADC _ EN;
the voltage stabilizing circuit U2 is connected with the charge pump circuit 2, a fourth control signal port CH _ DET and an eleventh MOS tube Q20;
the eleventh MOS transistor Q20 is connected with the twelfth MOS transistor Q21;
the twelfth MOS transistor Q21 is connected to the fifth control signal port ADC _ EN.
The voltage stabilizing circuit U2 comprises a first voltage stabilizing diode ZD4, a fourth resistor R41, a fifth resistor R42, a first diode D11 and a second diode D10;
one end of the first zener diode ZD4 is connected to the fourth resistor R41 and the first diode D11, and the other end is grounded;
the fourth resistor R41 is connected to the fourth control signal port CH _ DET through the fifth resistor R42;
the first diode D11 is connected with the charge pump circuit 1 through the second diode D10.
And a fuse is arranged between the protection plate positive end drive circuit 3 and the lithium battery.
The specific working principle of the positive end protection drive control circuit of the lithium battery protection board is as follows:
the charge pump circuit 2 is used for boosting the circuit, and the charge pump circuit 2 can output higher voltage, so that the requirement of the protection board positive end drive circuit 3 is met.
In fig. 3, the first MOS transistor Q1 is a secondary charging MOS transistor, the second MOS transistor Q2 is a primary charging MOS transistor, and the third MOS transistor Q3 is a discharging MOS transistor. When charging is required, the first control signal port CHG inputs a high level, the sixth MOS transistor Q14 and the eighth MOS transistor Q15 are turned on, and the gates of the fifth MOS transistor Q12 and the seventh MOS transistor Q10 are pulled down to a low level, respectively, and the fifth MOS transistor Q12 and the seventh MOS transistor Q10 are turned on. The voltages on the gates of the first and second MOS transistors Q1 and Q2 become the output voltage of the charge pump circuit 2, so as to turn on the protection board positive side driving circuit 3, the protection circuit U1 is composed of a fourth MOS transistor Q8, a first resistor R14, a second resistor R18, and a third resistor R19, and is a secondary control protection circuit of the protection board positive side driving circuit 3, and is used for preventing the protection board positive side driving circuit 3 from being normally closed when the first control signal port CHG control voltage is abnormal, when a secondary charging overvoltage occurs, the fourth MOS transistor Q8 can be turned on by inputting a high level into the second control signal port CO2, and at this time, no matter what state the gate of the first MOS transistor Q1 is, the voltage is pulled down to a low level, so that the first MOS transistor Q1 is closed, and charging is closed.
When discharging is required, when a high level is input to the third control signal port DSG, the ninth MOS transistor Q17 will be turned on, and the base of the transistor Q11 is pulled down to a low level, so that the transistor Q11 is turned on, and the gate of the third MOS transistor Q3 will be changed into the output voltage of the charge pump circuit 2, so that the third MOS transistor Q3 is turned on to discharge.
In fig. 4, when the voltage of the first power output terminal P + needs to be detected, and the fifth control signal port ADC _ EN inputs a high level, the twelfth MOS transistor Q21 is turned on, and the gate of the eleventh MOS transistor Q20 is pulled down to a low level, so that the eleventh MOS transistor Q20 is turned on. The loop where the eleventh MOS transistor Q20 is located is connected to the charging loop, and the voltage of the first power output terminal P + can be obtained by detecting the voltage of the fourth control signal port CH _ DET. When the battery voltage is detected to be too low, the charging voltage acquisition circuit 4 is continuously turned on, a voltage stabilizing circuit U2 is formed by the first voltage stabilizing diode ZD4, the fourth resistor R41 and the fifth resistor R42, and power is supplied to the charge pump circuit 2 through the first diode D11 and the second diode D10.
The lithium battery protection board positive end protection driving control circuit provided by the utility model is introduced in detail, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the explanation of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions on some technical features, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (6)
1. A lithium battery protection board positive end protection drive control circuit is characterized by comprising:
the device comprises a charge pump circuit, a protective plate positive end driving circuit and a charging voltage acquisition circuit;
the charge pump circuit is connected with the protection board positive end drive circuit and the lithium battery, and is used for boosting the voltage of the protection board positive end drive circuit;
the protection plate positive end driving circuit is connected with the charge pump circuit, the charging voltage acquisition circuit and the lithium battery and is used for stopping charging after receiving a charging closing signal when the lithium battery is in an overcharged state, and stopping discharging after receiving a discharging closing signal when the lithium battery is in an overdischarged state;
the charging voltage acquisition circuit is connected with the charge pump circuit and the protection plate positive end driving circuit and used for detecting the charging voltage of the lithium battery.
2. The circuit of claim 1, wherein the protection board positive side drive circuit comprises:
the power supply comprises a first MOS tube, a second MOS tube, a third MOS tube, a protection circuit, a fifth MOS tube, a sixth MOS tube, a seventh MOS tube, an eighth MOS tube, a ninth MOS tube, a tenth MOS tube, a first control signal port, a second control signal port, a third control signal port and a first power supply output end;
the first MOS tube is connected with the second MOS tube, the protection circuit, the fifth MOS tube, the seventh MOS tube and the lithium battery;
the second MOS tube is connected with the third MOS tube and the seventh MOS tube;
the third MOS tube is connected with the ninth MOS tube, the tenth MOS tube and the first power supply output end;
the fifth MOS tube is connected with the sixth MOS tube, the seventh MOS tube, the tenth MOS tube and the charge pump circuit;
the seventh MOS tube is connected with the eighth MOS tube;
the sixth MOS tube is connected with the eighth MOS tube;
the sixth MOS tube and the eighth MOS tube are connected with the first control signal port;
the ninth MOS tube is connected with the tenth MOS tube and a third control signal port;
the protection circuit is connected with the second control signal port;
and the first control signal port is connected with the sixth MOS tube and the eighth MOS tube.
3. The circuit of claim 2, wherein the protection circuit comprises: the fourth MOS tube, the first resistor, the second resistor and the third resistor;
the first resistor is connected with the drain electrode of the fourth MOS tube, the second resistor is connected with the grid electrode of the fourth MOS tube, and the third resistor is connected with the grid electrode and the source electrode of the fourth MOS tube;
the second resistor is connected with the second control signal port.
4. The circuit of claim 1, wherein the charge voltage acquisition circuit comprises: the voltage stabilizing circuit, the eleventh MOS tube, the twelfth MOS tube, the fourth control signal port and the fifth control signal port;
the voltage stabilizing circuit is connected with the charge pump circuit, the fourth control signal port and the eleventh MOS tube;
the eleventh MOS tube is connected with the twelfth MOS tube;
and the twelfth MOS tube is connected with the fifth control signal port.
5. The circuit of claim 4, wherein the voltage regulator circuit comprises a first zener diode, a fourth resistor, a fifth resistor, a first diode, a second diode;
one end of the voltage stabilizing diode is connected with the fourth resistor and the first diode, and the other end of the voltage stabilizing diode is grounded;
the fourth resistor is connected with the fourth control signal port through the fifth resistor;
the first diode is connected with the charge pump circuit through the second diode.
6. The circuit of claim 1, wherein a fuse is provided between the protection board positive side drive circuit and the lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122988964.XU CN217362594U (en) | 2021-12-01 | 2021-12-01 | Positive end protection drive control circuit of lithium battery protection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122988964.XU CN217362594U (en) | 2021-12-01 | 2021-12-01 | Positive end protection drive control circuit of lithium battery protection board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217362594U true CN217362594U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122988964.XU Active CN217362594U (en) | 2021-12-01 | 2021-12-01 | Positive end protection drive control circuit of lithium battery protection board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217362594U (en) |
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2021
- 2021-12-01 CN CN202122988964.XU patent/CN217362594U/en active Active
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