CN203339675U - Voltage protecting circuit used for single lithium battery - Google Patents
Voltage protecting circuit used for single lithium battery Download PDFInfo
- Publication number
- CN203339675U CN203339675U CN2013203936349U CN201320393634U CN203339675U CN 203339675 U CN203339675 U CN 203339675U CN 2013203936349 U CN2013203936349 U CN 2013203936349U CN 201320393634 U CN201320393634 U CN 201320393634U CN 203339675 U CN203339675 U CN 203339675U
- Authority
- CN
- China
- Prior art keywords
- optocoupler components
- voltage
- battery
- lithium battery
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a voltage protecting circuit used for a single lithium battery and relates to the technical field of battery protection. Two ends of the lithium battery are connected with a charging protection circuit and a load protecting circuit in parallel respectively. The charging protection circuit includes a first photoelectric coupling element, a second photoelectric coupling element and an overvoltage detecting circuit. An output terminal of the first photoelectric coupling element is connected with an output terminal of the second photoelectric coupling element through the overvoltage detecting circuit and is then connected to two ends of the battery in parallel. Charging voltage lets the first photoelectric coupling element switch on and an output terminal of the second photoelectric coupling element is used for driving to cut off charging current. The load protecting circuit includes a third photoelectric coupling element, a fourth photoelectric coupling element and an undervoltage detecting circuit. When charging the battery, the overvoltage detecting circuit is put to work. When using the battery, the undervoltage detecting circuit is put to work along with load voltage. The voltage protecting circuit used for the single lithium battery has advantages that the voltage protecting circuit used for the single lithium battery is put to work only during a battery charging process or a battery using process and does not work during a standby process of the battery, so that no monitoring circuit current is supplied and no electric energy consumption is produced.
Description
Technical field
The utility model relates to the battery protection technical field, specifically a kind of single lithium battery voltage protection circuit
, the single lithium battery voltage protection circuit especially only just dropped into when charging and use.
Background technology
Common battery pack does not arrange the monomer battery voltage protective circuit.Even there is the protection of this respect also mostly to adopt the method for fixing access.No matter battery is all being worked in what state (charging, stand-by, use) protection.Although it is little that protective circuit consumes electric energy, if the battery long period in dormant state, power consumption should not ignored the damage of battery.Some power tool batteries particularly, the circuit negative interaction of this long-term participation follow-up work clearly.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of single lithium battery voltage protection circuit, just only drop into when battery charge and during use, does not participate in work during battery is stand-by, does not supply with the observation circuit electric current, does not produce power consumption.
The utility model is realized with following technical scheme: a kind of single lithium battery voltage protection circuit, and the two ends of lithium battery are parallel with respectively charge protector and load protection circuit; Described charge protector comprises the first optocoupler components, the second optocoupler components and for detection of the overvoltage detection circuit of lithium battery voltage; The output of the first optocoupler components connects after the input of the second optocoupler components the two ends that are connected in parallel on battery by overvoltage detection circuit, charging voltage makes the first optocoupler components open-minded, and the output of the second optocoupler components is for driving the shutoff charging current;
Described load protection circuit comprises the 3rd optocoupler components, the 4th optocoupler components and for detection of the Undervoltage detection circuit of lithium battery voltage; The output of the 3rd optocoupler components connects after the input of the 4th optocoupler components the two ends that are connected in parallel on battery by Undervoltage detection circuit, voltage in load makes the 3rd optocoupler components open-minded, and the output of the 4th optocoupler components is for driving the switching off load electric current.
The beneficial effects of the utility model are: circuit only when battery charge, automatically follow voltage while using and drop into, do not consume the beneficial effect of electric energy during having battery stand-by, avoid battery to be in long-time low discharging current dormant state, the useful life of prolongation battery.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated
Fig. 1 is the utility model theory structure block diagram;
Fig. 2 is the utility model circuit diagram.
Embodiment
As shown in Figure 1, a kind of single lithium battery voltage protection circuit is to be parallel with respectively charge protector and load protection circuit at the two ends of lithium battery.Described charge protector comprises the first optocoupler components, the second optocoupler components and for detection of the overvoltage detection circuit of lithium battery voltage; The output of the first optocoupler components connects after the input of the second optocoupler components the two ends that are connected in parallel on battery by overvoltage detection circuit, charging voltage makes the first optocoupler components open-minded, and the output of the second optocoupler components is for driving the shutoff charging current.
Described load protection circuit comprises the 3rd optocoupler components, the 4th optocoupler components and for detection of the Undervoltage detection circuit of lithium battery voltage; The output of the 3rd optocoupler components connects after the input of the 4th optocoupler components the two ends that are connected in parallel on battery by Undervoltage detection circuit, voltage in load makes the 3rd optocoupler components open-minded, and the output of the 4th optocoupler components is for driving the switching off load electric current.
Follow charging voltage during the battery charging, drop into overvoltage detection circuit; Follow load voltage when battery is used and drop into Undervoltage detection circuit.
During the battery charging, supply voltage makes the first optocoupler components conducting, opens overvoltage detection circuit, and when battery charging voltage arrives set point greatly, current drives the second optocoupler components conducting linkage circuit in circuit disconnects charge power supply.
When battery is used, voltage in load makes the 3rd optocoupler components conducting, open Undervoltage detection circuit, when cell voltage reduces to set point, the electric current in circuit is reduced to and can not maintains the 4th optocoupler components conducting linkage circuit and provide and report to the police or the switching off load electric current.
As shown in Figure 2, overvoltage detection circuit comprises the reference voltage adjustable voltage stabilizer, the negative electrode of reference voltage adjustable voltage stabilizer and with reference to being parallel with resistance R 3 between the utmost point, anode and with reference to being parallel with adjustable resistance RP1 between the utmost point; The negative electrode of reference voltage adjustable voltage stabilizer is connected with the output of the first optocoupler components, and anode is connected with the input of the second optocoupler components; Described Undervoltage detection circuit adopts light-emitting diode, and the positive pole of light-emitting diode is connected with the output of the 3rd optocoupler components, and negative pole is connected with the input of the 4th optocoupler components.Wherein, four optocoupler components all adopt the PC817 photoelectrical coupler, and the reference voltage adjustable voltage stabilizer adopts TL431 reference voltage adjustable voltage stabilizer, and light-emitting diode adopts 1.8 volts of leucismus Red LED1s; Adjustable resistance RP1 adopts 0.5 watt of 47 kilohms of multiturn potentiometer, and also available 0.5 watt of 22 kilohms of metal film resistor substitutes; Resistance R 1 adopts 0.5 watt of 47 ohmic resistor; Resistance R 2 adopts 0.5 watt of 470 ohmic resistor; Resistance R 3 adopts 0.5 watt of 82 kilohms of metal film resistor.
Claims (2)
1. a single lithium battery voltage protection circuit, it is characterized in that: the two ends of lithium battery are parallel with respectively charge protector and load protection circuit; Described charge protector comprises the first optocoupler components, the second optocoupler components and for detection of the overvoltage detection circuit of lithium battery voltage; The output of the first optocoupler components connects after the input of the second optocoupler components the two ends that are connected in parallel on battery by overvoltage detection circuit, charging voltage makes the first optocoupler components open-minded, and the output of the second optocoupler components is for driving the shutoff charging current;
Described load protection circuit comprises the 3rd optocoupler components, the 4th optocoupler components and for detection of the Undervoltage detection circuit of lithium battery voltage; The output of the 3rd optocoupler components connects after the input of the 4th optocoupler components the two ends that are connected in parallel on battery by Undervoltage detection circuit, voltage in load makes the 3rd optocoupler components open-minded, and the output of the 4th optocoupler components is for driving the switching off load electric current.
2. a kind of single lithium battery voltage protection circuit according to claim 1, it is characterized in that: described overvoltage detection circuit comprises the reference voltage adjustable voltage stabilizer, the negative electrode of reference voltage adjustable voltage stabilizer and with reference to being parallel with resistance R 3 between the utmost point, anode and with reference to being parallel with adjustable resistance RP1 between the utmost point; The negative electrode of reference voltage adjustable voltage stabilizer is connected with the output of the first optocoupler components, and anode is connected with the input of the second optocoupler components; Described Undervoltage detection circuit adopts light-emitting diode, and the positive pole of light-emitting diode is connected with the output of the 3rd optocoupler components, and negative pole is connected with the input of the 4th optocoupler components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203936349U CN203339675U (en) | 2013-07-04 | 2013-07-04 | Voltage protecting circuit used for single lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203936349U CN203339675U (en) | 2013-07-04 | 2013-07-04 | Voltage protecting circuit used for single lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339675U true CN203339675U (en) | 2013-12-11 |
Family
ID=49708331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203936349U Expired - Lifetime CN203339675U (en) | 2013-07-04 | 2013-07-04 | Voltage protecting circuit used for single lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203339675U (en) |
-
2013
- 2013-07-04 CN CN2013203936349U patent/CN203339675U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204068215U (en) | With the lithium battery of power-off protection | |
| CN202917976U (en) | Protective device of solar energy LED power supply input polarity reversal connection | |
| CN206099459U (en) | A activation circuit for battery management system | |
| CN204046213U (en) | A kind of discharge and recharge is with mouth control circuit | |
| CN205610297U (en) | Energy -conservation automatic control circuit that charges | |
| CN103354350B (en) | A kind of voltage protection method for single lithium battery | |
| CN204391837U (en) | Be suitable for the automatic power-off circuit of electric motor car charging and the electric motor car of this circuit is installed | |
| CN204425014U (en) | The full electric auto-power-off device of a kind of electric car charger | |
| CN103078154A (en) | Fore-lying zero-power consumption control electronic switch and control method for new energy source lithium ion battery pack | |
| CN204271668U (en) | A kind of solar cell charge-discharge controller | |
| CN103354351B (en) | A kind of voltage protection method for single lead-acid battery | |
| CN202888874U (en) | Distributed operation power supply | |
| CN203339675U (en) | Voltage protecting circuit used for single lithium battery | |
| CN204835509U (en) | Hold battery under voltage protection circuit | |
| CN201562728U (en) | Switch type protective circuit for lithium batteries | |
| CN205051407U (en) | Lithium batteries protects controller | |
| CN203339674U (en) | Voltage protecting circuit used for single lead acid battery | |
| CN203491681U (en) | Battery over-discharge protection circuit for computer | |
| CN205070409U (en) | Switch transistor pressure drop holding circuit and applied this pressure drop holding circuit's lithium battery protection circuit | |
| CN201263095Y (en) | Multipath combined charger | |
| CN102780250A (en) | Solar charge controller | |
| CN204205574U (en) | A kind of over-discharge protection circuit | |
| CN204103480U (en) | A kind of charger reversal connection and short-circuit protection circuit | |
| CN203871876U (en) | Charging and discharging protection structure of battery management system | |
| CN205283194U (en) | Battery management system's linear power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |