CN105244850B - Battery protecting circuit and its control method - Google Patents
Battery protecting circuit and its control method Download PDFInfo
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- CN105244850B CN105244850B CN201510648939.3A CN201510648939A CN105244850B CN 105244850 B CN105244850 B CN 105244850B CN 201510648939 A CN201510648939 A CN 201510648939A CN 105244850 B CN105244850 B CN 105244850B
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Abstract
The invention discloses a kind of battery protecting circuit and its control methods; the circuit includes the switching device being connected between battery and load, for detecting the electric current between battery and switching device, and the control device for being converted to the detection device of corresponding the first voltage value and being connect respectively with switching device and detection device；Detected the first voltage value is compared by the control device for controlling detection device with reference voltage level, and when the first voltage value is less than or equal to reference voltage level, control switching device is kept it turned on, and when the first voltage value is more than reference voltage level, it is then turned on after control switching device shutdown preset time, and it controls detection device when switching device is opened and carries out circulate operation, when the circulate operation number of detection device is more than preset loop number, control switching device is held off.The present invention can avoid the problem that false triggering short-circuit protection occurs in battery protecting circuit, improve the accuracy of short-circuit protection.
Description
Technical field
The present invention relates to battery protection technical field more particularly to a kind of battery protecting circuit and its control methods.
Background technology
Current electric bicycle, balance car, backup power supply etc. can generally configure electricity using the electronic equipment of power battery
Circuit is protected when short trouble occurs in the circuit of equipment, battery to be prevented to be damaged in pond.
Short-circuit protection in the prior art is protected generally by the size for detecting cell output current and with given electric current
Shield value is compared, if the current value detected is more than given current protection value, switch OFF is controlled, with what is cut off the power
Output, to be protected.
But this battery protecting circuit in capacitive load (load of voltage delay current characteristics) when, will go out
The now accidentally action of protection.This is because, when the switch is opened, battery can carry out capacitive load charging energy-storing, and capacitive load
At the initial stage of charging, the quantity of electric charge of storage is less, and electric current is larger, and as the charging time increases, when the quantity of electric charge of storage is more,
Electric current is smaller instead.Therefore, when which is used for capacitive load, battery protecting circuit detects the electric current of battery output
When, it just will appear load just when powering on, detection electric current is larger and makes battery protecting circuit trigger protection, and then cuts off battery output
To the power supply of load, however at this point, not necessarily load short circuit occurs and causes electric current excessive, it may be possible to capacitive load
It influences, therefore, there are problems that accidentally protecting using existing this battery protecting circuit.
Invention content
The main purpose of the present invention is to provide a kind of battery protecting circuits, it is intended to avoid battery protecting circuit false triggering
Problem, while can accurately protect the battery from damage when load really short circuit occurs.
To achieve the above object, battery protecting circuit proposed by the present invention includes control device, switching device and detection dress
It sets, the input terminal of the switching device is connect with battery, and output end and the load of the switching device connect, the switching device
Controlled end connect with the control device；The input terminal of the detection device is connected between the battery and switching device,
The output end of the detection device is connect with the control device；Wherein, the control device includes：
Control unit detects the battery for controlling the detection device and exports to the electric current of load, and is converted to pair
It is compared with reference voltage level after the first voltage value answered；Be additionally operable to control when switching device is opened the detection device into
Row circulate operation；
First execution unit, for when the first voltage value is more than the reference voltage level, controlling the switch dress
It is then turned on after setting shutdown preset time, then detects the first voltage value, control the switch dress when more than the reference voltage level again
Judgement preset time is set, and recycles this process；It is additionally operable to be more than preset loop in the circulate operation number of the detection device
When number, controls the switching device and be held off；
Second execution unit, for when the first voltage value is less than or equal to the reference voltage level, controlling institute
Switching device is stated to keep it turned on.
Preferably, described control unit is additionally operable to during the detection device carries out cycle detection, if detection obtains
The current voltage value obtained is less than the voltage value of setting, and reaches preset time in the time of detection device progress circulate operation
When, it controls the switching device and opens and keep it turned on.
Preferably, described control unit is additionally operable to during controlling the detection device progress cycle detection, according to
Last detected voltage value adjusts current reference voltage value.
Preferably, the battery protecting circuit further includes the Failure elimination detection device for being connected in parallel on the load both ends, institute
It states Failure elimination detection device to be also electrically connected with the control unit of the control device, under the control of described control unit
The impedance at the load both ends is detected, and when the impedance value detected is more than preset impedance value, feeds back a trigger signal, with
Make described control unit control the switching device to reopen.
Preferably, the detection device includes sampling resistor and voltage comparator, the first end of the sampling resistor and institute
It states battery and described control unit connection, the second end of the sampling resistor is connect with the input terminal of the switching device；It is described
The positive input of voltage comparator is connect with the second end of the sampling resistor, the reverse input end of the voltage comparator with
One output end of the control device connects, and the output end of the voltage comparator and an input terminal of the control device connect
It connects.
Preferably, the switching device includes switching tube and switch driving circuit, is opened described in the grid warp of the switching tube
It closes driving circuit to connect with the control device, the source electrode of the switching tube is the input terminal of the switching device, the switch
The drain electrode of pipe is the output end of the switching device.
The present invention also provides a kind of control method of battery protecting circuit, the battery protecting circuit include control device,
The input terminal of switching device and detection device, the switching device is connect with battery, the output end of the switching device and load
Connection, the controlled end of the switching device are connect with the control device；The input terminal of the detection device is connected to the electricity
Between pond and switching device, the output end of the detection device is connect with the control device；Wherein, the battery protecting circuit
Control method include：
Step A, the detection device that the control device controls detects the battery and exports to the electric current of load, and converts
To be compared with reference voltage level after corresponding the first voltage value；
Step B, the control device control the switch dress when the first voltage value is more than the reference voltage level
It is then turned on after setting shutdown preset time, and returns and execute the step A, until the circulate operation number of the detection device is more than
When preset loop number, controls the switching device and be held off；
Step C, the control device control institute when the first voltage value is less than or equal to the reference voltage level
It states switching device to keep it turned on, and returns and execute the step A.
Preferably, the control device is during cycle executes the step A, if detection device detection obtains
Current voltage value be less than setting voltage value, and the detection device carry out circulate operation time reach preset time
When, it controls the switching device and opens and keep it turned on.
Preferably, the step A further includes the control device during detection device carries out cycle detection,
Current reference voltage value is adjusted according to last detected voltage value.
Control unit is arranged in the control device of the battery protecting circuit by the way that battery protecting circuit is arranged in the present invention
Control detection device detection battery is exported to the electric current of load, and be converted to after corresponding the first voltage value with reference voltage level into
Row compares；And by the way that the first execution unit is arranged when the first voltage value is more than reference voltage level, control the switching device
It is then turned on after shutdown preset time；Then detection device is controlled again by multiple cycle detection and after comparing confirmation, is judged
Whether load circuit is really short-circuit, if repeatedly after cycle detection, the first voltage value, then can be true still above reference voltage level
There is short circuit in fixed load circuit, and if the first voltage value is less than or equal to reference voltage level, it can determine load circuit
It is to be influenced by capacitive load and keep initial current larger, is not that load circuit is really short-circuit, accurately sentences in this way, being achieved that
Break and load circuit whether really short circuit, the problem of false triggering protection occurs so as to avoid the battery protecting circuit.
Description of the drawings
Fig. 1 is the electrical block diagram of battery protecting circuit preferred embodiment of the present invention；
Fig. 2 is the high-level schematic functional block diagram of control device shown in Fig. 1 of the present invention；
Fig. 3 is the flow diagram of one embodiment of control method of battery protecting circuit of the present invention；
Fig. 4 is the flow diagram of another embodiment of control method of battery protecting circuit of the present invention.
Drawing reference numeral explanation：
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of battery protecting circuit, suitable for it is various using battery as the electronic equipment of power supply, keep away
When exempting from load short circuits, power supply continues powering load, and causes battery or load damage or safety problem.
Referring to Fig.1, in one embodiment, which includes control device 100, switching device 200 and detection
The input terminal of device 300, the switching device 200 is connect with battery 400, output end and the load 500 of the switching device 200
Connection, the controlled end of the switching device 200 are connect with the control device 100, and the switching device 200 is when opening, control
400 output supply voltage of battery processed to load 500, the switching device 200 when off, cuts off the output of the battery 400 extremely
The supply voltage of load 500；The input terminal of the detection device 300 is connected between the battery 400 and switching device 200,
The output end of the detection device 300 is connect with the control device 100.
In the present embodiment, the bleeder circuit of resistance composition can be used in the detection device 300 and voltage comparator is realized,
The current detecting chip realization of profession is either sampled, and in this preferred embodiment, the detection device 300 passes through a sampling electricity
Resistance R1 and voltage comparator U1 is detected to realize the electric current to battery 400 output to load 500, wherein the sampling electricity
The first end of resistance R1 is connect with the battery 400 and the control device 100, and the second end of the sampling resistor R1 is opened with described
Close the input terminal connection of device；Sampling resistor R1 is used to carry out the supply voltage of the output of battery 400 to load 500 in electric current to adopt
Sample；The positive input of the voltage comparator U1 is connect with the second end of the sampling resistor R1, is used for input sample signal,
The reverse input end of the voltage comparator U1 is connect with an output end of the control device 100, to input the reference
Voltage, the output end of the voltage comparator U1 is connect with an input terminal of the control device 100, for exporting comparison result
To control device 100.It can be readily appreciated that when voltage comparator U1 exports high level signal, indicate that sampled voltage is more than ginseng
Voltage (reference voltage is not construed as limiting, can according to actual needs arbitrary value) is examined, indicates that 500 electric currents of load are excessive, load
Circuit is likely to occur short circuit, needs to turn off switching device 200, be damaged to avoid load 500 and battery 400 because electric current is excessive.
In the present embodiment, the switching device 200 can be used various electronic switches and realize, such as the switch that triode forms
The switching circuit of circuit or metal-oxide-semiconductor composition, in one is preferably implemented, the switching device 200 includes switching tube M1 and switch
The grid of driving circuit 201, the switching tube M1 is connect through the switch driving circuit 201 with the control device 100, described
The source electrode of switching tube M1 is the input terminal of the switching device 200, and the drain electrode of the switching tube M1 is the switching device 200
Output end.Wherein, switching tube M1 is metal-oxide-semiconductor, and raising switches on and turn off efficiency.
With reference to Fig. 2, in the present embodiment, make the battery protecting circuit false triggering in order to avoid the influence of capacitive load 500
Protection, the control device 100 include control unit 101, the first execution unit 102 and the second execution unit 103, specifically：
Described control unit 101 detects the output of the battery 400 to load 500 for controlling the detection device 300
Electric current, and be compared with reference voltage level after being converted to corresponding the first voltage value；It is additionally operable to when switching device 200 is opened
It controls the detection device 300 and carries out circulate operation.
First execution unit 102 is used for when the first voltage value is more than the reference voltage level, described in control
Switching device 200 is then turned on after turning off preset time, then detects the first voltage value, controls switch dress when more than reference voltage level again
Judgement preset time is set, and recycles this process；It is additionally operable to be more than default follow in the circulate operation number of the detection device 300
When ring number, controls the switching device 200 and be held off.
Second execution unit 103 is used for when the first voltage value is less than or equal to the reference voltage level,
The switching device 200 is controlled to keep it turned on.
In the control device 100, when control unit 101, which controls switching device 200, opens, detection device 300 will be right
The electric current of battery 400 output to load 500 is detected, and by the electric current detected be converted to after corresponding the first voltage value with
Reference voltage level is compared；When the first voltage value is less than or equal to the reference voltage level, load circuit is indicated
Do not occur short circuit, control the switching device 200 and keep it turned on, load 500 is made to work normally；And in the first voltage
It when value is more than the reference voltage level, indicates that load circuit is likely to occur short circuit, controls the shutdown of the switching device 200 at this time,
It to protect battery 400, and is then turned on after preset time, continues to give load 500 power supply, and detected again, if it is negative
Load circuit is really short-circuit, then either capacitive load 500 is also non-capacitive load 500, the electric current that following cycle repeated detection arrives
Substantially it will not change, necessarily the first voltage value is more than reference voltage level to the result that such current detecting comes out, you can with determination
Circuit is really short-circuit, and at this time battery protecting circuit triggering is to protect battery, and this is to be effectively protected.And if it is load
Circuit really short circuit, then it is by the influence of capacitive load 500, and when with charging that the electric current detected for the first time is excessive
Between growth, the charge capacity of capacitive load 500 rises, that is, the capacitive load 500 that the electric current detected also will be with charges electricity
The rising of amount and gradually change, and in continuously decreasing trend, until capacitive load 500 is fully charged, electric current tends towards stability, and at this moment examines
The voltage measured will be lower than reference voltage, and then confirm circuit there is no short circuit, and holding switching device 200 is opened, and load is made
500 normal works, circuit protection circuit not trigger protection, in this way, by cycle detection and confirming and accurately having judged load
Whether circuit is really short-circuit so that the battery protecting circuit is not in false triggering.
It should be noted that described control unit 101, is additionally operable to carry out the mistake of circulate operation in the detection device 300
Cheng Zhong adjusts current reference voltage value according to last detected voltage value.For the battery 400 of different inner cores, due to
The internal resistance of battery 400 is different, and the influence to output current is also different, can be corresponding by detected voltage for the first time
Reference value is set, to improve the safety of circuit protection.
It is understood that battery protecting circuit of the present invention is controlled by the way that control unit 101 is arranged in control device 100
Detection device 300 detects the output of battery 400 to the electric current of load 500, and be converted to after corresponding the first voltage value with reference to electricity
Pressure value is compared；And by the way that the first execution unit 102 is arranged when the first voltage value is more than reference voltage level, described in control
Switching device 200 is then turned on after turning off preset time；Then it is by multiple cycle detection and relatively more true that detection device 300 is controlled again
After recognizing, load circuit whether really short circuit is judged, if repeatedly after cycle detection, the first voltage value is still above with reference to electricity
Pressure value can then determine that short circuit occurs in load circuit, and if the first voltage value is less than or equal to reference voltage level, it can be with
It determines that load circuit is to be influenced by capacitive load 500 and keep initial current larger, is not that load circuit is really short-circuit, in this way,
Whether really circuit of the present invention is achieved that accurately judges load circuit short circuit, to avoid the battery protecting circuit from accidentally touching
Hair protection.
Based on above-described embodiment, in a further embodiment, the efficiency of control is also improved by temporal judgement,
Specifically, described control unit 101 are additionally operable to during the detection device 300 carries out cycle detection, if detection obtains
Current voltage value be less than the voltage value of setting, and when the time being detected in the detection device 300 reaches preset time,
The switching device 200 is controlled to open and keep it turned on.It is not real short circuit it is understood that for load 500
In the case of, recycle it is a small number of several times after, the detection device 300 would not detect the voltage value more than setting again, and
It needs to enter normal pattern, and is no longer on short-circuit detecting state；And in fact, if load circuit is short-circuit, short circuit current
Be appreciated that it is invariable, therefore, as long as finding that the trend reduced occurs in the electric current that detects, so that it may to determine load
500 do not occur short circuit, and load 500, which can power on, to work always, no longer need to loop control switch device 200 be switched on and off and
Waste of resource.
Further, the battery protecting circuit further includes the Failure elimination detection dress for being connected in parallel on 500 both ends of the load
600 are set, the Failure elimination detection device 600 is also electrically connected with the control unit of the control device 100 101, in institute
The impedance for detecting 500 both ends of the load under the control of control unit 101 is stated, and is more than preset resistance in the impedance value detected
When anti-value, a trigger signal is fed back, so that described control unit 101 controls the switching device 200 and reopens.It needs to illustrate
, after trouble hunting is good, load is disconnected, the impedance for loading 500 both ends at this time levels off to infinity, when being again turned on, i.e.,
It can work normally.When load circuit short circuit, the impedance for loading 500 both ends is very small, therefore, 500 both ends is loaded by detection
Impedance variations, can determine load circuit whether be in short trouble guard mode.
The present invention also provides a kind of control method of battery protecting circuit, which is based on above-mentioned battery protecting circuit
It realizes, the particular circuit configurations and function of the battery protecting circuit are with reference to above-described embodiment, and details are not described herein again.
With reference to Fig. 3, in one embodiment, the control method of the battery protecting circuit includes：
Step S10, controls the detection device 300 and detects the battery and export to the electric current of load 500, and is converted to pair
The first voltage value answered；
Step S20, judges whether the first voltage value is more than reference voltage level；If so, to step S30 is executed, if it is not,
Then follow the steps S40；
The step S30 controls the shutdown of the switching device 200；
The step S31, judges whether the circulate operation number of the detection device 300 is more than preset loop number；If
It is, until step S311 is executed, if it is not, thening follow the steps S312；
The step S311 controls the switching device 200 and is held off；
The step S312 controls the switching device 200 and is then turned on after preset time, and returns and execute the step
S10；
Step S40 controls the switching device when the first voltage value is less than or equal to the reference voltage level
200 keep it turned on, and return and execute the step S10.
When control switching device 200 open when, detection device 300 will to battery 400 export to load 500 electric current into
Row detection, and the electric current detected is converted to and is compared with reference voltage level after corresponding the first voltage value；Described
When one voltage value is less than or equal to the reference voltage level, indicates that load circuit does not occur short circuit, control the switching device
200 keep it turned on, and load 500 is made to work normally；And when the first voltage value is more than the reference voltage level, it indicates
Load circuit is likely to occur short circuit, controls the shutdown of the switching device 200 at this time, with protection load 500 and battery 400, and
It is then turned on after preset time, continues to give load 500 power supply, and detected again, it is really short-circuit if it is load circuit, then not
It is also non-capacitive load 500 that pipe, which is capacitive load 500, following cycle repeated detection to electric current will not change substantially, examine in this way
Measuring the result come, necessarily the first voltage value is more than reference voltage level, you can to determine that circuit is really short-circuit, the at this time electricity
Pond protects circuit triggering to protect battery, and this is to be effectively protected.And if it is load circuit really short circuit, then first
The secondary electric current detected is excessive be by the influence of capacitive load 500, and with the growth in charging time, capacitive load 500
Charge capacity rises, that is, the electric current detected also will be with the rising of 500 charge capacity of capacitive load and gradually change, and be in
Trend is continuously decreased, until capacitive load 500 is fully charged, electric current tends towards stability, and the voltage at this moment detected will be lower than referring to
Voltage, and then circuit is confirmed there is no short circuit, holding switching device 200 is opened, and load 500 is made to work normally, circuit protection electricity
Road not trigger protection, in this way, by cycle detection and confirming and accurately having judged load circuit whether really short circuit so that should
Battery protecting circuit is not in false triggering.
It should be noted that the step S10 may additionally include the process that the detection device 300 carries out cycle detection
In, current reference voltage value is adjusted according to last detected voltage value.For the battery 400 of different inner cores, due to
The internal resistance of battery 400 is different, and the influence to output current is also different, can be corresponding by detected voltage for the first time
Reference value is set, to improve the safety of circuit protection.
It is understood that the control method of battery protecting circuit of the present invention in control detection device 300 by detecting electricity
The electric current of the output of pond 400 extremely load 500, and be compared with reference voltage level after being converted to corresponding the first voltage value；And
When the first voltage value is more than reference voltage level, controls after the switching device 200 turns off preset time and be then turned on；Then it controls again
Whether really detection device 300 processed judges load circuit short circuit, if more by multiple cycle detection and after comparing confirmation
After secondary cycle detection, the first voltage value can then determine that short circuit occurs in load circuit still above reference voltage level, and if the
One voltage value is less than or equal to reference voltage level, then can determine that load circuit is to be influenced and made initial by capacitive load 500
Electric current is larger, is not that load circuit is really short-circuit, accurately judges whether load circuit is really short in this way, being achieved that
Road, to avoid the battery protecting circuit false triggering from protecting.
Based on above-described embodiment, in a further embodiment, the efficiency of control is also improved by temporal judgement,
Specifically, with reference to Fig. 4, further include between executing the step S30 and step S31：
Step S32, judges whether the first voltage value that current detection obtains is less than last detected first voltage
Value；If so, to step S33 is executed, the step S10 is executed if it is not, then returning；
The step S33, judges whether the time of the progress circulate operation of the detection device 300 reaches preset time；If
It is, then to step S40 is executed, if it is not, then executing the step S31.
It is understood that for the slower capacitive load 500 of some chargings, its whether really short circuit, flower are detected
The time taken is also relatively long, because the speed that electric current declines is very slow, after multiple cycle detection, electric current may just have bright
Aobvious variation and the reference voltage level for reaching setting, waste of resource apparent in this way；Short and in fact, as long as load circuit is short-circuit
Road electric current is invariable, therefore, as long as finding that the trend reduced occurs in the electric current detected, so that it may to determine load
500 do not occur short circuit, and load 500, which can power on, to work always, no longer need to loop control switch device 200 be switched on and off and
Waste of resource.
It should be noted that the technical solution of each embodiment of the present invention can be combined with each other, but must be with this
The technical staff in field can be implemented as basis, will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of this technical solution is not present, also not the present invention claims protection domain within.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
Equivalent structure transformation made by description of the invention and accompanying drawing content is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (7)
1. a kind of battery protecting circuit, which is characterized in that including control device, switching device and detection device, the switch dress
The input terminal set is connect with battery, and output end and the load of the switching device connect, the controlled end of the switching device and institute
State control device connection；The input terminal of the detection device is connected between the battery and switching device, the detection device
Output end connect with the control device；Wherein, the control device includes：
Control unit detects the battery for controlling the detection device and exports to the electric current of load, and is converted to corresponding
It is compared with reference voltage level after the first voltage value；It is additionally operable to control the detection device when switching device is opened and be followed
Ring operates；
First execution unit, for when the first voltage value is more than the reference voltage level, controlling the switching device and closing
It is then turned on after disconnected preset time, then detects the first voltage value, controlled the switching device when more than the reference voltage level again and sentence
Disconnected preset time, and recycle this process；It is additionally operable to be more than preset loop number in the circulate operation number of the detection device
When, it controls the switching device and is held off；
Second execution unit, for when the first voltage value is less than or equal to the reference voltage level, being opened described in control
Device is closed to keep it turned on；
Described control unit is additionally operable to during controlling the detection device progress cycle detection, be detected according to the last time
The voltage value of acquisition adjusts current reference voltage value.
2. battery protecting circuit as described in claim 1, which is characterized in that described control unit is additionally operable in the detection
During device carries out cycle detection, if detected current voltage value is less than the voltage value of setting, and in the detection
When the time that device carries out circulate operation reaches preset time, controls the switching device and open and keep it turned on.
3. battery protecting circuit as described in claim 1, which is characterized in that the battery protecting circuit further includes being connected in parallel on institute
The Failure elimination detection device at load both ends is stated, the Failure elimination detection device is also electric with the control unit of the control device
Connection, the impedance for detecting the load both ends under the control of described control unit, and be more than in the impedance value detected
When preset impedance value, a trigger signal is fed back, so that described control unit controls the switching device and reopens.
4. the battery protecting circuit as described in claims 1 to 3 any one, which is characterized in that the detection device includes adopting
Sample resistance and voltage comparator, the first end of the sampling resistor are connect with the battery and described control unit, the sampling
The second end of resistance is connect with the input terminal of the switching device；The positive input of the voltage comparator and sampling electricity
The second end of resistance connects, and the reverse input end of the voltage comparator is connect with an output end of the control device, the electricity
The output end of pressure comparator is connect with an input terminal of the control device.
5. battery protecting circuit as claimed in claim 4, which is characterized in that the switching device includes that switching tube and switch drive
Dynamic circuit, the grid of the switching tube are connect through the switch driving circuit with the control device, the source electrode of the switching tube
For the input terminal of the switching device, the drain electrode of the switching tube is the output end of the switching device.
6. a kind of control method of battery protecting circuit, which is characterized in that the battery protecting circuit includes control device, switch
The input terminal of device and detection device, the switching device is connect with battery, and output end and the load of the switching device connect,
The controlled end of the switching device is connect with the control device；The input terminal of the detection device is connected to the battery and opens
Between closing device, the output end of the detection device is connect with the control device；Wherein, the control of the battery protecting circuit
Method includes：
Step A, the detection device that the control device controls detect the battery and export to the electric current of load, and are converted to pair
It is compared with reference voltage level after the first voltage value answered；
Step B, the control device control the switching device and close when the first voltage value is more than the reference voltage level
It is then turned on after disconnected preset time, and returns and execute the step A, preset until the circulate operation number of the detection device is more than
When cycle-index, controls the switching device and be held off；
Step C, the control device are opened when the first voltage value is less than or equal to the reference voltage level described in control
It closes device to keep it turned on, and returns and execute the step A；
The step A further includes the control device during detection device carries out cycle detection, according to the last time
Detected voltage value adjusts current reference voltage value.
7. the control method of battery protecting circuit as claimed in claim 6, which is characterized in that the control device is held in cycle
During the row step A, if the detected current voltage value of the detection device is less than the voltage value of setting, and in institute
Time that detection device carries out circulate operation is stated when reaching preset time, the switching device is controlled and opens and keep it turning on shape
State.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648939.3A CN105244850B (en) | 2015-10-09 | 2015-10-09 | Battery protecting circuit and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648939.3A CN105244850B (en) | 2015-10-09 | 2015-10-09 | Battery protecting circuit and its control method |
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| CN106099838A (en) * | 2016-07-25 | 2016-11-09 | 贝兹维仪器(苏州)有限公司 | Connector for logging while drilling protection device based on sampling resistor |
| CN106655101A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Household electrical appliance and over-current protection device and method of power factor corrector |
| CN106655102A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Power factor corrector over-current protection device and home appliance |
| CN109863416B (en) * | 2016-11-07 | 2021-05-11 | 日产自动车株式会社 | Short circuit detection device |
| DE102017202103B3 (en) * | 2017-02-09 | 2018-03-01 | Ellenberger & Poensgen Gmbh | Method of operating an electronic circuit breaker and electronic circuit breaker |
| CN107785968B (en) * | 2017-12-05 | 2024-02-13 | 广州金升阳科技有限公司 | Battery short-circuit protection circuit of charging power supply |
| TR201721920A2 (en) * | 2017-12-26 | 2019-07-22 | Arcelik As | ONE BATTERY CONTROL CIRCUIT |
| CN108051683B (en) * | 2017-12-26 | 2020-01-24 | 四川福润得数码科技有限责任公司 | Load connection or disconnection detection circuit, power supply control circuit and control method |
| CN109787314A (en) * | 2019-02-19 | 2019-05-21 | 惠州拓邦电气技术有限公司 | A kind of method, apparatus and product of BMS short-circuit protection |
| CN112467814B (en) * | 2019-09-09 | 2022-07-26 | 宁波拓邦智能控制有限公司 | Battery pack discharge management method and system |
| CN114362092B (en) * | 2021-12-14 | 2024-06-07 | 深圳拓邦股份有限公司 | Load short-circuit protection circuit and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287704A (en) * | 1998-10-05 | 2001-03-14 | 夸尔柯姆股份有限公司 | Battery pack protection circuit |
| CN102237808A (en) * | 2010-04-21 | 2011-11-09 | 英属维京群岛商承恭科技有限公司 | Power supply and protection method thereof |
| CN103427392A (en) * | 2012-05-18 | 2013-12-04 | 中国长城计算机深圳股份有限公司 | Protective device for electric system |
| CN103647323A (en) * | 2013-12-13 | 2014-03-19 | 海能达通信股份有限公司 | Cell discharge overcurrent protection circuit and cell discharge overcurrent protection method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5355072A (en) * | 1991-07-31 | 1994-10-11 | Sanyo Electric Co., Ltd. | Battery discharging apparatus |
| JP3969586B2 (en) * | 2003-08-27 | 2007-09-05 | 松下電器産業株式会社 | Overcurrent protection circuit |
| EP1673828B1 (en) * | 2003-10-14 | 2013-05-08 | Black & Decker Inc. | Protection methods, protection circuits and protective devices for secondary batteries, a power tool, charger and battery pack adapted to provide protection against fault conditions in the battery pack |
| CN1979992A (en) * | 2005-12-07 | 2007-06-13 | 比亚迪股份有限公司 | Charge-discharge protection circuit of secondary cell group |
-
2015
- 2015-10-09 CN CN201510648939.3A patent/CN105244850B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287704A (en) * | 1998-10-05 | 2001-03-14 | 夸尔柯姆股份有限公司 | Battery pack protection circuit |
| CN102237808A (en) * | 2010-04-21 | 2011-11-09 | 英属维京群岛商承恭科技有限公司 | Power supply and protection method thereof |
| CN103427392A (en) * | 2012-05-18 | 2013-12-04 | 中国长城计算机深圳股份有限公司 | Protective device for electric system |
| CN103647323A (en) * | 2013-12-13 | 2014-03-19 | 海能达通信股份有限公司 | Cell discharge overcurrent protection circuit and cell discharge overcurrent protection method |
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Denomination of invention: Battery protection circuit and control method thereof Effective date of registration: 20220829 Granted publication date: 20181026 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2022440020179 |
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Address after: Room 758, 7th Floor, Block A and B, Xinghua Building, No. 2018 Shennan Middle Road, Fuqiang Community, Huaqiang North Street, Futian District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Peicheng Electronic Technology Co.,Ltd. Address before: 518000 Chegongmiao Tian'an Innovation Technology Plaza B1407-01, Futian District, Shenzhen City, Guangdong Province (office only) Patentee before: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. |
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Date of cancellation: 20231127 Granted publication date: 20181026 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2022440020179 |