CN206461346U - A kind of serial lithium battery group protection board for high current - Google Patents
A kind of serial lithium battery group protection board for high current Download PDFInfo
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- CN206461346U CN206461346U CN201720140455.2U CN201720140455U CN206461346U CN 206461346 U CN206461346 U CN 206461346U CN 201720140455 U CN201720140455 U CN 201720140455U CN 206461346 U CN206461346 U CN 206461346U
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Abstract
The utility model is related to a kind of serial lithium battery group protection board for high current, is provided with current foldback circuit, prosecution circuit and equalizing circuit and its connected mode.The overdischarge that wherein current foldback circuit is included containing multiple switch metal-oxide-semiconductor enables part（A）Part is enabled with overcharge（B）, prosecution circuit include battery protection chip（U1）Include multiple switch metal-oxide-semiconductor with RC balanced protections part, and equalizing circuit.Pass through battery protection chip（U1）Detect each lithium battery both end voltage and then judge to need the action to battery execution, then utilize to battery protection chip（U1）The low and high level of pin 3 and 6 regulation so as to influence to switch the break-make of metal-oxide-semiconductor in corresponding each circuit, finally reach the protection to large-capacity battery pack.The utility model is simply and easily adjusted by various circuits, is effectively guaranteed the service life of the serial lithium battery group for high current.
Description
Technical field
The utility model is related to lithium battery group detection technique field, more particularly to a kind of serial lithium battery for high current
Group protection board.
Background technology
Nowadays the puzzlement that resource scarcity and environmental pollution are caused to the mankind is increasing, and the exploitation of new energy is into country
Or even the key object of global evolution, it is well known that new lithium battery group also progressively replaces old-fashioned lead-acid battery group to be used for
On electric bicycle and electric automobile, light, a series of advantage of high-performance etc. of lithium battery also causes electric tool
Enhanced convenience, efficiently.Each manufacturer produces corresponding lithium battery protection board also for the lithium battery group of different types
To ensure the security of battery pack, and to a series of safeguard measure of battery pack.But lithium battery group is when charging
If it cannot be guaranteed that the equalizaing charge of each single battery, then the strong influence performance of battery pack and the longevity will be used
Life, battery pack protection plate aims at lithium battery series battery electric power system and designed.For preventing battery pack because overcharging
Electricity, overdischarge, overcurrent, short circuit, charge and unbalanced etc. cause to damage or the life-span is reduced.Also avoid because short circuit causes fire
Situation occurs.
Utility model content
For the problems of system of lithium battery group protection in the market, the utility model provides a kind of new lithium
Battery protection system, is realized with balanced to the overcharge of serial lithium battery group, overdischarge, overcurrent and short-circuit protection and realization
Charge function, by the parallel drive of many switching tubes, realizes the charging and discharging function of high current.
Protected the utility model proposes a kind of serial lithium battery group protection board for high current, including prosecution circuit, excessively stream
Protection circuit and equalizing circuit, it is characterised in that：
The overdischarge that current foldback circuit includes containing multiple switch metal-oxide-semiconductor enables part（A）With overcharge enable portion
Point（B）, wherein overdischarge enable part（A）Part is enabled with overcharge（B）It is connected in parallel；
Preferably, equalizing circuit includes multiple balanced branch roads, and each of which equilibrium branch road includes a switch metal-oxide-semiconductor；
Further, each lithium battery both end voltage of prosecution electric circuit inspection and based on testing result provide signal to excessively stream protect
Protection circuit and balanced branch road.
Preferably, prosecution circuit also includes battery protection chip（U1）With RC balanced protections part.
Further, the overdischarge in current foldback circuit enables part（A）Multiple switch metal-oxide-semiconductor input be connected
And it is connected to battery protection chip（U1）Current detecting pin（D）, the output end of multiple switch metal-oxide-semiconductor is connected and is connected to lithium
The negative pole end pin of battery pack（B1-）, and the control end of multiple switch metal-oxide-semiconductor is connected and is connected to the battery protection chip
（U1）Overdischarge enable pin（GFP）；
Overcharge in current foldback circuit enables part（B）The input of switch metal-oxide-semiconductor be connected and be connected to battery
Protect chip（U1）Current detecting pin（D）, the output end of multiple switch metal-oxide-semiconductor is connected and is connected to battery protection chip
（U1）Charging negative pole input pin（C-）, and the control end of multiple switch metal-oxide-semiconductor is connected to battery protection chip（U1）'s
Overcharge enables pin（GCP）.
Preferably, lithium battery group passes through the RC balanced protections part and battery protection chip（U1）It is connected.
Further, RC balanced protections part includes multigroup resistance and electric capacity, and wherein resistance and electric capacity is connected in series, each
It is connected in series between group resistance and electric capacity.
Preferably, each balanced branch road in equalizing circuit is in parallel with each lithium battery of the lithium battery group respectively connects
Connect.
Further, a kind of serial lithium battery group protection board for high current also includes light emitting diode（L1）, it is used for
Indicate the working condition of the lithium battery group.
Preferably, light emitting diode（L1）Positive pole and battery protection chip（U1）Current detecting pin（D）Connection, its
The negative pole end pin of negative pole and lithium battery group（B1-）Connection.
Further, indicating circuit and the negative pole end pin of lithium battery group（B1-）And battery protection chip（U1）Connection.
Preferably, a kind of serial lithium battery group protection board for high current also includes power supply, wherein power supply
It is connected with voltage-regulator diode.
Further, a kind of serial lithium battery group protection board for high current also includes being connected to battery protection chip
（U1）Relieving circuit, wherein relieving circuit include multiple switch metal-oxide-semiconductor.
Brief description of the drawings
Following specification of the present utility model referring to the drawings, wherein：
Fig. 1 is a kind of schematic diagram of serial lithium battery group protection board for high current；
Fig. 2 is the circuit diagram of the current foldback circuit shown in Fig. 1；
Fig. 3 is the circuit diagram of the prosecution circuit shown in Fig. 1；
Fig. 4 is the circuit diagram of the equalizing circuit shown in Fig. 1；
Fig. 5 is a kind of circuit diagram of the relieving circuit of serial lithium battery group protection board for high current；
Fig. 6 is a kind of pinouts of the lithium battery group of serial lithium battery group protection board for high current.
Embodiment
Below by embodiment, and with reference to accompanying drawing, the technical solution of the utility model is described in further detail.
Protected the utility model proposes a kind of serial lithium battery group protection board for high current, including prosecution circuit, excessively stream
Protection circuit and equalizing circuit, it is characterised in that：
The overdischarge that current foldback circuit includes containing multiple switch metal-oxide-semiconductor enables part（A）With overcharge enable portion
Point（B）, wherein overdischarge enable part（A）Part is enabled with overcharge（B）It is connected in parallel；
Equalizing circuit includes multiple balanced branch roads, and each of which equilibrium branch road includes a switch metal-oxide-semiconductor；
The each lithium battery both end voltage of prosecution electric circuit inspection and based on testing result provide signal to current foldback circuit and
Balanced branch road.
Preferably, prosecution circuit also includes battery protection chip（U1）With RC balanced protections part.
Overdischarge in current foldback circuit enables part（A）The input of multiple switch metal-oxide-semiconductor be connected and be connected to
Battery protection chip（U1）Current detecting pin（D）, the output end of multiple switch metal-oxide-semiconductor is connected and is connected to lithium battery group
Negative pole end pin（B1-）, and the control end of multiple switch metal-oxide-semiconductor is connected and is connected to the battery protection chip（U1）Mistake
Electric discharge enables pin（GFP）；
Overcharge in current foldback circuit enables part（B）The input of switch metal-oxide-semiconductor be connected and be connected to battery
Protect chip（U1）Current detecting pin（D）, the output end of multiple switch metal-oxide-semiconductor is connected and is connected to battery protection chip
（U1）Charging negative pole input pin（C-）, and the control end of multiple switch metal-oxide-semiconductor is connected to battery protection chip（U1）'s
Overcharge enables pin（GCP）.
Preferably, lithium battery group passes through the RC balanced protections part and battery protection chip（U1）It is connected.
Further, RC balanced protections part includes multigroup resistance and electric capacity, and wherein resistance and electric capacity is connected in series, each
It is connected in series between group resistance and electric capacity.
Preferably, each balanced branch road in equalizing circuit is in parallel with each lithium battery of the lithium battery group respectively connects
Connect.
Further, a kind of serial lithium battery group protection board for high current also includes light emitting diode（L1）, it is used for
Indicate the working condition of the lithium battery group.
Light emitting diode（L1）Positive pole and battery protection chip（U1）Current detecting pin（D）Connection, its negative pole with
The negative pole end pin of lithium battery group（B1-）Connection.
The negative pole end pin of indicating circuit and lithium battery group（B1-）And battery protection chip（U1）Connection.
A kind of serial lithium battery group protection board for high current also includes power supply, wherein power supply and voltage stabilizing two
Pole pipe is connected.
A kind of serial lithium battery group protection board for high current also includes being connected to battery protection chip（U1）Releasing
Circuit, wherein relieving circuit include multiple switch metal-oxide-semiconductor.
As another embodiment, during Fig. 2 is the circuit diagram of the current foldback circuit shown in Fig. 1, current foldback circuit
Overdischarge enable part（A）The input of multiple switch metal-oxide-semiconductor be all connected and be connected to battery protection chip（U1）'s
Current detecting pin（D）, output end is all connected and is connected to lithium battery group negative pole end pin（B1-）, multiple switch metal-oxide-semiconductor
Control end is all connected to battery protection chip（U1）Overdischarge enable pin（GFP）；
Overcharge in current foldback circuit enables part（B）Multiple switch metal-oxide-semiconductor input all be connected and even
It is connected to battery protection chip（U1）Current detecting pin（D）, the output end of multiple switch metal-oxide-semiconductor is all connected and is connected to electricity
Protect chip in pond（U1）Charging negative pole input pin（C-）, the control end of multiple switch metal-oxide-semiconductor is all connected to battery protection
Chip（U1）Overcharge enable pin（GCP）.
When implementing large current density Electricity Functional, it is big that 8 30V100A are respectively adopted in overcharge and over switching tube
Electric current N-channel MOS pipe parallel drive, internal resistance reduction when turning on switching tube, lithium battery group in large current charge and electric discharge,
Reduced by loss during metal-oxide-semiconductor, the caloric value of metal-oxide-semiconductor is also reduced simultaneously, enable lithium battery group carry out the charging of high current with
Electric discharge.
Fig. 3 is the circuit diagram of the prosecution circuit shown in Fig. 1.As shown in figure 3, prosecution circuit includes battery protection chip
（U1）With RC balanced protections part.Wherein, RC balanced protections part includes first resistor（R1）, second resistance（R2）, the 3rd electricity
Resistance（R3）, the 4th resistance（R4）With the first electric capacity（C1）, the second electric capacity（C2）, the 3rd electric capacity（C3）, the 4th electric capacity（C4）；First
Resistance（R1）, second resistance（R2）, 3rd resistor（R3）, the 4th resistance（R4）With the first electric capacity（C1）, the second electric capacity（C2）,
Three electric capacity（C3）, the 4th electric capacity（C4）Series connection, and first resistor（R1）One end and battery protection chip（U1）Pin
（17）It is connected, the positive terminal of the other end and lithium battery group（B1+）It is connected, the first electric capacity（C1）One end and battery protection chip
（U1）Pin（17）It is connected, the other end and battery protection chip（U1）Pin（15）With the negative pole end of lithium battery group（B1-）
It is connected；Second resistance（R2）One end and battery protection chip（U1）Pin（19）It is connected, the other end and lithium battery group are just
Extremely（B2+）It is connected, the second electric capacity（C2）One end and battery protection chip（U1）Pin（19）It is connected, the other end and lithium electricity
The negative pole end of pond group（B1+）It is connected；3rd resistor（R3）One end and battery protection chip（U1）Pin（21）It is connected, it is another
End and the positive terminal of lithium battery group（B3+）It is connected, the 3rd electric capacity（C3）One end and battery protection chip（U1）Pin（21）
It is connected, the negative pole end of the other end and lithium battery group（B2+）It is connected；4th resistance（R4）One end and battery protection chip（U1）'s
Pin（23）It is connected, the input of the other end and lithium battery group（B4+）It is connected, the 4th electric capacity（C4）One end and battery protection core
Piece（U1）Pin（23）It is connected, the other end and battery protection chip（U1）Pin（23）With the positive terminal of lithium battery group（B3
+）It is connected.
In addition, battery protection chip（U1）Overdischarge enable pin（GFP）With battery protection chip（U1）Pin 6 lead to
Cross resistance R18 to be connected, battery protection chip（U1）Overcharge enable pin（GCP）With battery protection chip（U1）Pin 3
It is connected by resistance R25.
When performing additives for overcharge protection action, lithium battery group is charged, battery protection chip（U1）Detect the He of pin 15
Voltage between 17（That is the voltage at lithium ion battery group B1 two ends）, voltage between pin 17 and 19（That is lithium battery group B2 two
The voltage at end）, voltage between pin 19 and 21（That is the voltage at lithium battery group B3 two ends）, voltage between pin 21 and 23
（That is the voltage at lithium battery group B4 two ends）, voltage between pin 23 and 9（That is the voltage at lithium battery group B5 two ends）.Set a mistake
The detection voltage threshold that charges and overcharge release voltage threshold, when any one economize on electricity cell voltage exceedes overcharge detection voltage threshold
When, battery protection chip（U1）It is considered as detecting overcharge condition and implements protection：Low level is exported by adjustment pin 3
So as to close N-channel MOS FET pipes, stop charging.Work as battery protection chip（U1）The voltage of all lithium batteries of detection is below
When overcharge releases voltage threshold, high level is returned in the saltus step of pin 3, then proceeds by charging.
Similarly, when performing over action, lithium battery group is discharged, battery protection chip（U1）Still examine
The voltage surveyed between pin 15 and 17（That is the voltage at lithium battery group B1 two ends）, voltage between pin 17 and 19（That is lithium battery
The voltage at group B2 two ends）, voltage between pin 19 and 21（That is the voltage at lithium battery group B3 two ends）, between pin 21 and 23
Voltage（That is the voltage at lithium battery group B4 two ends）, voltage between pin 23 and 9（That is the voltage at lithium battery group B5 two ends）.Setting
One overdischarge detection voltage threshold and overdischarge release voltage threshold, and voltage is detected when any one economize on electricity cell voltage exceedes overdischarge
During threshold value, battery protection chip（U1）It is considered as detecting over-discharge state and implements protection：Export low by adjustment pin 6
Level stops electric discharge so as to close electric discharge N-channel MOS FET pipes.Work as battery protection chip（U1）The electricity of all lithium batteries of detection
When pressure all releases voltage threshold higher than overdischarge, high level is returned in the saltus step of pin 6, releases over.
When performing overcurrent protection action, once battery protection chip（U1）Detect overcharge or charge over-current
When, in battery protection chip（U1）After built-in delay, the output low level of adjustment pin 3, switch metal-oxide-semiconductor shut-off.Similarly, one
Denier battery protection chip（U1）When detecting overdischarge or discharge over-current, after the external delay of capacitance settings, regulation is drawn
Pin 6 exports low level, switch metal-oxide-semiconductor shut-off.
In addition, when performing short-circuit protection action, once battery protection chip（U1）Short circuit is detected, in battery protection core
Piece（U1）After built-in delay, the output low level of adjustment pin 6, switch metal-oxide-semiconductor shut-off.
Fig. 4 is the circuit diagram of the equalizing circuit including multiple balanced branch roads shown in Fig. 1.
As shown in figure 4, the first switch metal-oxide-semiconductor in equalizing circuit（Q1）Control end and battery protection chip（U1）Draw
Pin（1-16）It is connected, the positive terminal pin of input and lithium battery group（B1+）It is connected, the negative pole end of its output end and lithium battery group
Pin（B1-）It is connected；Second switch metal-oxide-semiconductor in equalizing circuit（Q2）Control end and battery protection chip（U1）Pin
（1-18）It is connected, the positive terminal pin of its input and lithium battery group（B2+）It is connected, the positive terminal of output end and lithium battery group draws
Pin（B1+）It is connected；The 3rd switch metal-oxide-semiconductor in equalizing circuit（Q3）Control end and battery protection chip（U1）Pin（1-
20）It is connected, the positive terminal pin of input and lithium battery group（B3+）It is connected, the positive terminal pin of output end and lithium battery group（B2
+）It is connected；The 4th switch metal-oxide-semiconductor in equalizing circuit（Q4）Control end and battery protection chip（U1）Pin（1-22）Phase
Even, input and the positive terminal pin of lithium battery group（B4+）It is connected, the positive terminal pin of output end and lithium battery group（B3+）Phase
Even.
In charging process, when lithium battery cell voltage is higher than battery balanced detection voltage threshold VCBDn（Wherein n=1,2,
3、4、5）, battery protection chip（U1）Start lithium battery equalization function.Specifically action is the function：Voltage exceedes battery balanced inspection
Survey voltage threshold VCBDn（n=1、2、3、4、5）Lithium battery corresponding to CBnPort（Pin 16, pin 18, pin 20 draws
Pin 22）High level is exported, by the N-channel switching tube on outside corresponding equalizing circuit（Q1, Q2, Q3, Q4）Open, balanced branch road
It is in parallel with the lithium battery group, it can play a part of shunting charging current, so as to reduce the charging current for flowing into lithium battery.Work as electricity
Cell voltage is less than battery balanced releasing voltage threshold VCBRn（N=1,2,3,4,5）When, corresponding CBnPort exports low level, cuts
Break corresponding balanced branch road, releases battery balanced function, reaches the purpose of equalizaing charge.
Fig. 5 is a kind of circuit diagram of the relieving circuit of serial lithium battery group protection board for high current.It is illustrated in figure 5
Discharge over-current protects the drive circuit of releasing.During discharge over-current protection is performed, work as battery protection chip
（U1）The voltage for detecting two sections of lithium battery group reaches normal value, that is, the relieving circuit shown in Fig. 5 is driven, with de-preservation.
In addition, the present embodiment can also include light emitting diode（L1）And power supply, wherein light emitting diode（L1）With
To indicate the working condition of lithium battery group.Work as light emitting diode（L1）When not working, represent that lithium battery group is normal；Work as light emitting diode
（L1）When bright, represent that lithium battery needs overcurrent protection, at this moment, battery protection chip（U1）Performed by the feedback of pin corresponding
Protection instruction so that reach protection lithium battery group purpose.
Fig. 6 is a kind of pinouts of the lithium battery group of serial lithium battery group protection board for high current.
Described above, simply preferred embodiment of the present utility model, the utility model is not limited to above-mentioned implementation
Mode, as long as it reaches technique effect of the present utility model with identical means, should all belong to protection domain of the present utility model.
Its technical scheme and/or embodiment can have a variety of modifications and variations in protection domain of the present utility model.
Claims (11)
1. a kind of serial lithium battery group protection board for high current, including prosecution circuit, current foldback circuit and equalizing circuit,
It is characterized in that：
The overdischarge that the current foldback circuit includes containing multiple switch metal-oxide-semiconductor enables part (A) and overcharge enable portion
Divide (B), wherein the overdischarge enables part (A) and overcharge enables part (B) and is connected in parallel；
The equalizing circuit includes multiple balanced branch roads, and each of which equilibrium branch road includes a switch metal-oxide-semiconductor；
The each lithium battery both end voltage of prosecution electric circuit inspection simultaneously provides signal to overcurrent protection electricity based on testing result
Road and balanced branch road.
2. a kind of serial lithium battery group protection board for high current according to claim 1, it is characterised in that the inspection
Controlling circuit also includes battery protection chip (U1) and RC balanced protections part.
3. a kind of serial lithium battery group protection board for high current according to claim 2, it is characterised in that the mistake
The input for the multiple switch metal-oxide-semiconductor that overdischarge in stream protection circuit enables part (A), which is connected and is connected to the battery, to be protected
Protect chip (U1) current detecting pin (D), it is the multiple switch metal-oxide-semiconductor output end be connected and be connected to lithium battery group bear
Extreme pin (B1-), the control end of the multiple switch metal-oxide-semiconductor, which is connected and is connected to the mistake of the battery protection chip (U1), puts
Electricity enables pin (GFP)；
The input for the switch metal-oxide-semiconductor that overcharge in the current foldback circuit enables part (B) is connected and is connected to described
The current detecting pin (D) of battery protection chip (U1), the output end of the multiple switch metal-oxide-semiconductor is connected and is connected to the electricity
The charging negative pole input pin (C-) of pond protection chip (U1), the control end of the multiple switch metal-oxide-semiconductor is connected to the battery
The overcharge of chip (U1) is protected to enable pin (GCP).
4. a kind of serial lithium battery group protection board for high current according to claim 2, it is characterised in that the lithium
Battery pack is connected by the RC balanced protections part with the battery protection chip (U1).
5. a kind of serial lithium battery group protection board for high current according to claim 2, it is characterised in that the RC
Balanced protection part includes multigroup resistance and electric capacity, wherein the resistance and electric capacity are connected in series, each group of resistance and electric capacity it
Between be connected in series.
6. a kind of serial lithium battery group protection board for high current according to claim 3, it is characterised in that described equal
Each lithium battery of each balanced branch road respectively with the lithium battery group in weighing apparatus circuit is connected in parallel.
7. a kind of serial lithium battery group protection board for high current according to claim 1, it is characterised in that also include
Light emitting diode (L1), the working condition for indicating the lithium battery group.
8. a kind of serial lithium battery group protection board for high current according to claim 7, it is characterised in that the hair
The positive pole of optical diode (L1) is connected with the current detecting pin (D) of the battery protection chip (U1), its negative pole and the lithium
Negative pole end pin (B1-) connection of battery pack.
9. a kind of serial lithium battery group protection board for high current according to claim 7, it is characterised in that the finger
Show that circuit is connected with the negative pole end pin (B1-) and the battery protection chip (U1) of the lithium battery group.
10. a kind of serial lithium battery group protection board for high current according to claim 1, it is characterised in that also wrap
Power supply is included, the power supply is connected with voltage-regulator diode.
11. a kind of serial lithium battery group protection board for high current according to claim 1, it is characterised in that also wrap
The relieving circuit for being connected to the battery protection chip (U1) is included, wherein the relieving circuit includes multiple switch metal-oxide-semiconductor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720140455.2U CN206461346U (en) | 2017-02-16 | 2017-02-16 | A kind of serial lithium battery group protection board for high current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720140455.2U CN206461346U (en) | 2017-02-16 | 2017-02-16 | A kind of serial lithium battery group protection board for high current |
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| CN206461346U true CN206461346U (en) | 2017-09-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254248A (en) * | 2018-10-08 | 2019-01-22 | 深圳市泰斯电子有限公司 | A kind of comprehensive battery check device of flexibly configurable detecting step |
-
2017
- 2017-02-16 CN CN201720140455.2U patent/CN206461346U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254248A (en) * | 2018-10-08 | 2019-01-22 | 深圳市泰斯电子有限公司 | A kind of comprehensive battery check device of flexibly configurable detecting step |
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