CN212627197U - Control circuit for turning off discharge output during lithium battery charging - Google Patents
Control circuit for turning off discharge output during lithium battery charging Download PDFInfo
- Publication number
- CN212627197U CN212627197U CN202020857369.5U CN202020857369U CN212627197U CN 212627197 U CN212627197 U CN 212627197U CN 202020857369 U CN202020857369 U CN 202020857369U CN 212627197 U CN212627197 U CN 212627197U
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- Prior art keywords
- limiting resistor
- current limiting
- voltage
- triode
- diode
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 37
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 15
- 230000015556 catabolic process Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a turn-off control circuit of output that discharges during lithium cell charging, include: a voltage input end C +, a diode D15, a voltage stabilizing diode DZ1, a current limiting resistor R4, a current limiting resistor R5, a current limiting resistor R14 and a triode Q1; the voltage input end C + is connected with the diode D15 and the voltage stabilizing diode DZ 1; the voltage stabilizing diode DZ1 is connected with the current limiting resistor R4 and the current limiting resistor R5; the base electrode of the triode Q1 is connected with the current-limiting resistor R4 and the current-limiting resistor R14, the transmitter, the current-limiting resistor R5 and the current-limiting resistor R14 are grounded, and the collector electrode of the triode Q1 is connected with the discharge pin of the lithium battery charge-discharge control chip. The utility model discloses utilize the turn-on voltage of diode and zener diode control triode, realize the control to the high-low level of lithium battery charging and discharging control chip's discharge pin port, realized the discharge control to among the lithium battery charging process, the circuit is simple and reliable and stable, can realize charging the demand that can not discharge.
Description
Technical Field
The utility model relates to a battery charge-discharge control technical field especially relates to a control circuit who turn-offs the output of discharging when lithium cell charges.
Background
When the electric vehicle is charged, because the user carelessly easily takes place the problem that the vehicle is started in the lithium battery charging process, great hidden danger is brought to user safety, and the current electric vehicle battery management system does not generally comprise an independent design which can not discharge when the lithium battery is charged, or the work of a discharging MOS (metal oxide semiconductor) tube is directly controlled by using a control signal, so that power consumption is abnormal, the service life of the battery is influenced, and in addition, the condition that the battery is over-discharged to death due to the power consumption of a detection circuit can also be generated.
Accordingly, there is a need in the art for improvements.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem who solves is: the utility model provides a control circuit of turn-off discharge output when lithium cell charges to solve the problem that exists among the prior art.
According to the utility model discloses an aspect discloses a control circuit who turn-offs the output of discharging during lithium battery charging, include:
a voltage input end C +, a diode D15, a voltage stabilizing diode DZ1, a current limiting resistor R4, a current limiting resistor R5, a current limiting resistor R14 and a triode Q1;
the voltage input end C + is connected with the diode D15 and the zener diode DZ1 and supplies power to the diode D15 and the zener diode DZ 1;
the voltage stabilizing diode DZ1 is connected with the current limiting resistor R4 and the current limiting resistor R5;
the base electrode of the triode Q1 is connected with the current limiting resistor R4 and the current limiting resistor R14;
the transmitter, the current limiting resistor R5 and the current limiting resistor R14 of the triode Q1 are grounded;
the collector of the triode Q1 is connected with a discharge pin of a lithium battery charge and discharge control chip;
when the voltage input end C + is not connected with a charger, the blocking of the diode D15 enables the voltage input end C + to form low voltage to counteract the breakdown voltage of the voltage stabilizing diode DZ1, the base bias value of the triode Q1 is formed by the partial voltage of the current limiting resistor R4 and the current limiting resistor R14, the partial voltage of the current limiting resistor R4 and the current limiting resistor R14 does not reach the conducting voltage of the base of the triode Q1, at the moment, the triode Q1 is cut off, and the discharging pin of the lithium battery charging and discharging control chip is in a normal discharging control level;
when a charger is connected to a voltage input end C +, voltage provided by the charger is added to the voltage input end C +, the voltage breaks down the voltage stabilizing diode DZ1, a base bias value of a triode Q1 is formed by the partial pressure of a current limiting resistor R4 and a current limiting resistor R14, the partial pressure of the current limiting resistor R4 and the current limiting resistor R14 is larger than the conduction voltage of the base of a triode Q1, the triode Q1 is in saturated conduction, the level of a discharge pin of a lithium battery charge and discharge control chip is pulled low, the discharge pin of the lithium battery charge and discharge control chip outputs low level, and discharge is closed.
Based on the utility model discloses in the control circuit's of the output of cutting off discharging when above-mentioned lithium cell charges another embodiment, current limiting resistance R14's resistance value is not more than 470 ohm.
Based on the utility model discloses in the control circuit's of the output that discharges is turn-offed when above-mentioned lithium cell charges another embodiment, zener diode DZ1 is 24V zener diode.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model discloses a control circuit of turn-off discharge output when lithium cell charging has utilized the one-way conductivity of diode and zener diode's breakdown voltage characteristic, the conduction voltage of control triode, the control of the high-low level of the pin port that discharges of realization to lithium cell charge and discharge control chip, thereby realized the control of discharging to the lithium cell charging in-process, the circuit is simple and reliable and stable, can realize charging the demand that can not discharge, and realize that can not miss the start-up protection when the diode electric leakage is bigger than normal, and unlikely with the requirement of electric core consumable to death.
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 control circuit for turning off a discharge output when a lithium battery is charged.
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 control circuit for turning off the discharge output when charging a lithium battery according to the present invention in more detail with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic structural diagram of an embodiment of the control circuit for turning off the discharge output during the charging of the lithium battery, as shown in fig. 1, the control circuit for turning off the discharge output during the charging of the lithium battery of this embodiment includes:
a voltage input end C +, a diode D15, a voltage stabilizing diode DZ1, a current limiting resistor R4, a current limiting resistor R5, a current limiting resistor R14 and a triode Q1;
the voltage input end C + is connected with the diode D15 and the zener diode DZ1 and supplies power to the diode D15 and the zener diode DZ 1;
the voltage stabilizing diode DZ1 is connected with the current limiting resistor R4 and the current limiting resistor R5;
the base electrode of the triode Q1 is connected with the current limiting resistor R4 and the current limiting resistor R14;
the transmitter, the current limiting resistor R5 and the current limiting resistor R14 of the triode Q1 are grounded;
the collector of the triode Q1 is connected with a discharge pin of a lithium battery charge and discharge control chip;
when the voltage input end C + is not connected with a charger, the blocking of the diode D15 enables the voltage input end C + to form low voltage to counteract the breakdown voltage of the voltage stabilizing diode DZ1, the base bias value of the triode Q1 is formed by the partial voltage of the current limiting resistor R4 and the current limiting resistor R14, the partial voltage of the current limiting resistor R4 and the current limiting resistor R14 does not reach the conducting voltage of the base of the triode Q1, at the moment, the triode Q1 is cut off, and the discharging pin of the lithium battery charging and discharging control chip is in a normal discharging control level;
when a charger is connected to a voltage input end C +, voltage provided by the charger is added to the voltage input end C +, the voltage breaks down the voltage stabilizing diode DZ1, a base bias value of a triode Q1 is formed by the partial pressure of a current limiting resistor R4 and a current limiting resistor R14, the partial pressure of the current limiting resistor R4 and the current limiting resistor R14 is larger than the conduction voltage of the base of a triode Q1, the triode Q1 is in saturated conduction, the level of a discharge pin of a lithium battery charge and discharge control chip is pulled low, the discharge pin of the lithium battery charge and discharge control chip outputs low level, and discharge is closed.
In practical design, considering that the maximum reverse leakage current of the diode D15 is 1mA, and the turn-on voltage of the transistor Q1 is greater than 0.4V, the resistance value of the current limiting resistor R14 is not greater than 470 ohms.
Because the damage can not appear more than the single-section lithium cell 2V, design 10 cluster electric core group, the voltage demand is more than 20V, zener diode DZ 1's steady voltage value gets 24V, has both made things convenient for the inefficacy of diode D15 this moment, makes the detection circuit that charges consume electric core group energy, and about 24V was reached to the voltage, zener diode DZ1 was low because of the breakdown voltage and is cut off, and the charger detects the return circuit and no longer consumes power by oneself to the guarantee electric core group can not damage, consequently, selects zener diode DZ1 is 24V zener diode.
The above detailed description is made on the control circuit for turning off the discharge output when the lithium battery provided by the present invention is charged, and the specific examples are applied herein to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; 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, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (3)
1. A control circuit for shutting down a discharge output when a lithium battery is charged, comprising:
a voltage input end C +, a diode D15, a voltage stabilizing diode DZ1, a current limiting resistor R4, a current limiting resistor R5, a current limiting resistor R14 and a triode Q1;
the voltage input end C + is connected with the diode D15 and the zener diode DZ1 and supplies power to the diode D15 and the zener diode DZ 1;
the voltage stabilizing diode DZ1 is connected with the current limiting resistor R4 and the current limiting resistor R5;
the base electrode of the triode Q1 is connected with the current limiting resistor R4 and the current limiting resistor R14;
the transmitter, the current limiting resistor R5 and the current limiting resistor R14 of the triode Q1 are grounded;
the collector of the triode Q1 is connected with a discharge pin of a lithium battery charge and discharge control chip;
when the voltage input end C + is not connected with a charger, the blocking of the diode D15 enables the voltage input end C + to form low voltage to counteract the breakdown voltage of the voltage stabilizing diode DZ1, the base bias value of the triode Q1 is formed by the partial voltage of the current limiting resistor R4 and the current limiting resistor R14, the partial voltage of the current limiting resistor R4 and the current limiting resistor R14 does not reach the conducting voltage of the base of the triode Q1, at the moment, the triode Q1 is cut off, and the discharging pin of the lithium battery charging and discharging control chip is in a normal discharging control level;
when a charger is connected to a voltage input end C +, voltage provided by the charger is added to the voltage input end C +, the voltage breaks down the voltage stabilizing diode DZ1, a base bias value of a triode Q1 is formed by the partial pressure of a current limiting resistor R4 and a current limiting resistor R14, the partial pressure of the current limiting resistor R4 and the current limiting resistor R14 is larger than the conduction voltage of the base of a triode Q1, the triode Q1 is in saturated conduction, the level of a discharge pin of a lithium battery charge and discharge control chip is pulled low, the discharge pin of the lithium battery charge and discharge control chip outputs low level, and discharge is closed.
2. A control circuit for turning off discharge output when charging a lithium battery as claimed in claim 1, wherein the resistance value of the current limiting resistor R14 is not more than 470 ohms.
3. The circuit for controlling the turn-off of the discharge output during the charging of a lithium battery as claimed in claim 1, wherein the zener diode DZ1 is a 24V zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020857369.5U CN212627197U (en) | 2020-05-21 | 2020-05-21 | Control circuit for turning off discharge output during lithium battery charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020857369.5U CN212627197U (en) | 2020-05-21 | 2020-05-21 | Control circuit for turning off discharge output during lithium battery charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212627197U true CN212627197U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020857369.5U Withdrawn - After Issue CN212627197U (en) | 2020-05-21 | 2020-05-21 | Control circuit for turning off discharge output during lithium battery charging |
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| Country | Link |
|---|---|
| CN (1) | CN212627197U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555397A (en) * | 2020-05-21 | 2020-08-18 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during lithium battery charging |
| CN111555397B (en) * | 2020-05-21 | 2024-06-04 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during charging of lithium battery |
-
2020
- 2020-05-21 CN CN202020857369.5U patent/CN212627197U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555397A (en) * | 2020-05-21 | 2020-08-18 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during lithium battery charging |
| CN111555397B (en) * | 2020-05-21 | 2024-06-04 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during charging of lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210226 Effective date of abandoning: 20240604 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20210226 Effective date of abandoning: 20240604 |