CN209516650U - A kind of low-power consumption is from balancing battery voltage sampling circuit - Google Patents
A kind of low-power consumption is from balancing battery voltage sampling circuit Download PDFInfo
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Abstract
The utility model discloses a kind of low-power consumption from balancing battery voltage sampling circuit, and battery pack includes 2 or more concatenated battery units；Battery voltage sampling circuit includes the detection branch for respectively corresponding each battery unit, and one end of each detection branch connects the positive terminal of respective battery unit, and the other end is grounded, and is in series at least two divider resistance in detection branch；The tie point of 2 divider resistances is voltage sampling port；Between the adjacent detection branch of corresponding adjacent cell, it is also connected with from balanced route, is serially connected with from equilibrium line road from equalizing resistance and is equipped with controllable the first controllable switch from balanced circuit on-off；Respectively the both ends of equilibrium route respectively with the positive and negative end of one of battery unit and connect；The second controllable switch of controllable detection branch on-off is further respectively had in each detection branch.The utility model can the balanced electric current for flowing through each series-connected cell unit of tested battery pack in the detection process, ensure the service life of battery pack, while reducing detection circuit power consumption.
Description
Technical field
The utility model relates to battery detecting administrative skill field, especially a kind of low function that can be used for battery management system
It consumes from balancing battery voltage sampling circuit.
Background technique
In traditional battery management system, series-connected cell high-voltage signal is acquired by the way of electric resistance partial pressure, this
Sample can reduce requirement of the postscript ADC to dynamic range.It is the concatenated voltage of 4 (n) batteries as shown in Figure of description Fig. 1
Acquisition Circuit, during voltage acquisition, the total current for flowing through Cell-1 is Ic1=I1+I2+I3+I4(...+In), it flows through
The total current of Cell-2 is Ic2=I2+I3+I4(...+In), and so on go down it is found that flowing through the electric current of highest Cell-4 (n)
Electric current difference for I4 (n), each battery is larger, therefore easily leads to the unbalanced of battery, reduces the service life of battery pack, and
And battery pack series unit is more, situation is more serious.
Meanwhile regardless of whether during the test, detection circuit is constantly on state, and electric quantity consumption is big, loss is fast.
Utility model content
The purpose of the utility model is to provide a kind of electric resistance partial pressure type battery voltage sampling circuits, can in the detection process
Weighing apparatus flows through the electric current of each series-connected cell unit of tested battery pack, ensures the service life of battery pack, while reducing detection circuit function
Consumption.
The technical solution that the utility model is taken are as follows: a kind of battery voltage sampling circuit, battery pack include 2 or more and connect
Battery unit；Battery voltage sampling circuit includes the detection branch for respectively corresponding each battery unit, and the one of each detection branch
The positive terminal of end connection respective battery unit, the other end are grounded, and are in series at least two divider resistance in detection branch；Described 2
The tie point of divider resistance is voltage sampling port；
Between the adjacent detection branch of corresponding adjacent cell, it is also connected with from balanced route, is gone here and there from equilibrium line road
It is connected to from equalizing resistance and is equipped with controllable the first controllable switch from balanced circuit on-off；The respectively both ends difference of equilibrium route
With the positive and negative end of one of battery unit and connect；
The second controllable switch of controllable detection branch on-off is further respectively had in each detection branch.
The resistance value of respective equalizing resistance is designed, so that flowing through the electricity for being equal to from the electric current of equalizing resistance and flowing through divider resistance
Stream, then can make the electric current for flowing through each battery unit identical, to minimize the electric current extracted from each battery unit up to 0, i.e.,
The unbalanced of each battery unit in battery pack is avoided, has ensured battery life.In application the utility model sample circuit, lead to
The switch state that external control changes the first controllable switch and the second controllable switch is crossed, that is, each detection branch can be switched and from
The on off operating mode of weighing apparatus route reduces the total power consumption of sample circuit to avoid kwh loss when not needing detection.
Preferably, define battery pack in by ground terminal, battery unit Cell-1, Cell-2 ..., Cell-n successively
Detection branch one end of series connection, corresponding battery unit Cell-i is connected to the positive terminal and Cell- (i+1) of battery unit Cell-i
Negative pole end between, the other end ground connection；2 divider resistances are in series in each detection branch；
In addition to battery unit Cell-1, all respectively and one is connected to from equilibrium line on the positive and negative end of other battery units
Road.
As an implementation, first controllable switch and the second controllable switch are respectively relay contact, and first
Controllable switch is serially connected with from equilibrium line road, and the second controllable switch and divider resistance are serially connected in detection branch.Each first is controllable
Switch and the second controllable switch can be realized controllable according to detection needs in such a way that the microcontrollers such as single-chip microcontroller control relay
The closing or opening state of switch switches, so that conducting is accordingly from balanced route or detection branch.
Further, it is connected between two detection branch of definition corresponding adjacent cell Cell-i and Cell- (i+1)
It is RB from equalizing resistancei+1, the electric current flowed through thereon is Ibi+1；The divider resistance of the detection branch of corresponding battery unit Cell-i
On the electric current that flows through be Iai；Battery unit Cell-1, Cell-2 ..., the equal initial voltage on Cell-n be Vcell；
Then RBi+1Resistance value selection are as follows:
Consider that the electric current extracted from each battery unit is 0, then Ib2=Ia1, Ibi=Ibi-1+Iai-1, i >=3, therefore RBi+1
Resistance value are as follows:
About the value of Vcell, the utility model is thought, when factory the initial voltage of all battery units be just as
, i.e. Vcell when design is from equalizing resistance, presets selection sampling end voltage VAiFor the optimum linear input voltage of ADC chip,
It considers further that route power consumption and interference free performance, presets the electric current Ia that divider resistance is crossed at each detection branch upstreami, can be according to detection
Road divider resistance intrinsic standoff ratio coefficient, Extrapolation obtains the value of initial Vcell.
Preferably, in each detection branch, the detection electric current Ia of divider resistance is flowed throughiIt is equal, then the resistance of respective equalizing resistance
Value selection are as follows:
RBi+1=Vcell/ (i*Ia1),i≥1。
Certainly, Ia1,Ia2,...,IanAlso it can choose different, but thus need divider resistance RA1,RA2,...,
RANDifferent, resistance type is more, gets ready the goods cumbersome, and can have the performance differences such as temperature drift.
Preferably, for there is 4 battery cells in series, and each battery unit nominal voltage is the battery pack of 3.6V, each to examine
Survey the divider resistance of branch road and the resistance value from equalizing resistance are as follows: RA1=RA2=RA3=RA4=25K Ω, R1=11K Ω,
RB2=36K Ω, R2=47K Ω, RB3=18K Ω, R3=83K Ω, RB4=12K Ω, R4=119K Ω.Under this embodiment,
When design is from equalizing resistance, selection sampling end voltage VA is presetiThe electric current phase flowed through for 2.5V, each detection branch divider resistance
Deng for 100 μ A.
As another embodiment, first controllable switch is that drain electrode is serially connected in source electrode from equilibrium line road
PMOS switch pipe connects and is additionally provided with time concatenated with divider resistance high-pressure side in the respectively on high-tension side each detection branch of balanced route
Road resistance, the grid of the first controllable switch of respective equilibrium line road are connected to this from balanced route high-pressure side and even detect branch
Between the loop resistance and divider resistance on road；
Second controllable switch is NMOS switch pipe, and the drain electrode of each second controllable switch and source electrode are serially connected in two partial pressures electricity
Detection line road between resistance, grid connect the control output end of peripheral control unit.
The peripheral control unit can be the microcontrollers such as single-chip microcontroller, utilize 3V the or 5V output voltage of one-chip machine port
The conducting of each NMOS switch pipe is directly driven, to realize the control of the second controllable switch.
When the second controllable switch is connected, then corresponding detection branch conducting, first be connected in detection branch controllably open
The grid of pass is high level, then the first controlled tr tube is connected, and then respectively balanced line conduction, both realizes sample circuit
From equilibrium, while when controlling sample circuit, it is only necessary to which the control to two controllable switches can be realized in a pin of controller
System, can simplified control route, reduce the output pin resource distribution of controller, and other device extensions.
Further, on the positive and negative end of battery unit Cell-1 and a balanced route, the equilibrium route are connected to
On be serially connected with the third controllable switch of equalizing resistance and controllable balanced circuit on-off.The equilibrium route can be used for other factors shadow
It rings, such as the capacity individual difference generated in battery use process and the battery difference of self discharge generation, causes the both ends Cell-1 electric
When pressure increases, equalizing resistance is connected by individually controlling third controllable switch, with balanced Cell-1 both end voltage.
The resistance value of equalizing resistance can according to the voltage change range of single battery unit and required euqalizing current into
Row setting.
Preferably, the third controllable switch is the relay contact or PMOS switch pipe for concatenating equalizing resistance；Third can
When control switching tube is PMOS switch pipe, source electrode and drain electrode is serially connected with equilibrium line road, and grid connects the control of peripheral control unit
Output end.
Beneficial effect
The utility model between adjacent detection branch by being arranged from equalizing resistance, so that the company of two adjacent cells
Contact is close to 0 to the electric current that detection branch flows out, so that the electric current flowed through on each battery unit is equal as far as possible, that is, avoids
Battery pack each battery unit is unbalanced in sampling process, can ensure battery life；
By the way that controllable switch is being arranged from balanced route and detection branch, so that the on-off of detection branch is controllable, thus
Can when not needing detection breaking circuit to reduce the energy consumption of detection circuit；
By setting PMOS and NMOS tube for controllable switch, control detects the on-off to show the way, and then by detection branch
The on-off of the certainly balanced branch of on-off variation control, the configuration requirement to control chip pin resource of reduction are not necessarily to other extensions.
Detailed description of the invention
Fig. 1 show conventional batteries voltage collection circuit schematic illustration；
Fig. 2 show a kind of battery voltage acquisition circuit schematic illustration of embodiment of the utility model；
Fig. 3 show the battery voltage acquisition circuit schematic illustration of the utility model another kind embodiment.
Specific embodiment
It is further described below in conjunction with the drawings and specific embodiments.
Shown in referring to figs. 2 and 3, battery pack that is tested or being managed includes 2 or more concatenated battery units；This is practical
It is novel from balancing battery voltage sampling circuit, the detection branch including respectively corresponding each battery unit, each detection branch
One end connects the positive terminal of respective battery unit, and the other end is grounded, and is in series at least two divider resistance in detection branch；Described 2
The tie point of a divider resistance is voltage sampling port；
Between the adjacent detection branch of corresponding adjacent cell, it is also connected with from balanced route, is gone here and there from equilibrium line road
It is connected to from equalizing resistance and is equipped with controllable the first controllable switch from balanced circuit on-off；The respectively both ends difference of equilibrium route
With the positive and negative end of one of battery unit and connect；
The second controllable switch of controllable detection branch on-off is further respectively had in each detection branch.
The resistance value of respective equalizing resistance is designed, so that flowing through the electricity for being equal to from the electric current of equalizing resistance and flowing through divider resistance
Stream, then can make the electric current for flowing through each battery unit identical, to minimize the electric current extracted from each battery unit up to 0, i.e.,
The unbalanced of each battery unit in battery pack is avoided, has ensured battery life.In application the utility model sample circuit, lead to
The switch state for changing the first controllable switch and the second controllable switch is crossed, that is, the on-off and equilibrium certainly of each detection branch can be switched
The on off operating mode of route reduces the total power consumption of sample circuit to avoid kwh loss when not needing detection.
Embodiment 1
Referring to figs. 2 and 3, in the present embodiment, 2 divider resistances R and RA are in series in each detection branch.
Define battery pack in by ground terminal, battery unit Cell-1, Cell-2 ..., Cell-n be sequentially connected in series, it is right
Detection branch one end of battery unit Cell-i is answered to be connected to the positive terminal of battery unit Cell-i and the cathode of Cell- (i+1)
Between end, other end ground connection；
In addition to battery unit Cell-1, all respectively and one is connected to from equilibrium line on the positive and negative end of other battery units
Road.
On the positive and negative end of battery unit Cell-1 and it is connected to a balanced route, the equilibrium line road is serially connected with equilibrium
Resistance RB1With the third controllable switch of controllable balanced circuit on-off.The equilibrium route can be used for other factors influence, such as battery
The battery difference that the capacity individual difference generated in use process and self discharge generate, when Cell-1 both end voltage being caused to increase,
Equalizing resistance is connected by individually controlling third controllable switch, with balanced Cell-1 both end voltage.
The resistance value of equalizing resistance can according to the voltage change range of single battery unit and required euqalizing current into
Row setting.
Embodiment 1-1
Based on embodiment 1, with reference to Fig. 2, in the present embodiment, the first controllable switch, the second controllable switch and third are controllably opened
Closing is respectively relay contact, and the first controllable switch is serially connected with from equilibrium line road, and the second controllable switch is concatenated with divider resistance
In in detection branch.Each first controllable switch and the second controllable switch can pass through the microcontrollers such as single-chip microcontroller according to detection needs
The mode of control relay realizes the closing or opening state switching of controllable switch, so that conducting is accordingly from balanced route or inspection
Survey branch.
The resistance value design principle of respective equalizing resistance are as follows: do not consider that the setting of the both ends Cell-1 equilibrium route, definition correspond to
Connected between two detection branch of adjacent cell Cell-i and Cell- (i+1) from equalizing resistance be RBi+1, flow through thereon
Electric current be Ibi+1；The electric current flowed through on the divider resistance of the detection branch of corresponding battery unit Cell-i is Iai；Battery unit
Cell-1, Cell-2 ..., the equal voltage on Cell-n be Vcell；Then RBi+1Resistance value selection are as follows:
Consider that the electric current extracted from each battery unit is 0, then Ib2=Ia1, Ibi=Ibi-1+Iai-1, i >=3, therefore RBi+1
Resistance value are as follows:
The design principle of the utility model are as follows: each battery list is flowed through during aligned sample by being arranged from equalizing resistance
The electric current of member, flows through Cell-1 for the battery pack of n (n > 4) a battery cells in series with reference to traditional sampling circuit diagram in Fig. 1
Total current be Ic1=I1+I2+I3+I4,...,+In, the total current for flowing through Cell-2 is Ic2=I2+I3+I4,...,+In, with this
Analogize down it is found that the electric current for flowing through highest Cell-n is In；
With reference to Fig. 2, the utility model passes through the value being back-calculated to obtain from equalizing resistance: it is arranged from after equalizing resistance, in order to
So that Ic1,Ic2,...,IcnIt is equal, then it is required that I1,I2,...,In-1Respectively equal to 0, guarantee not extract electricity from battery unit
Stream, then for any RBi+1(i >=1), the electric current Ib flowed through thereoni+1, in the detection branch of corresponding battery supply Cell-i points
The electric current Ia that piezoresistance flows throughiBetween relationship are as follows:
It is assumed that the voltage at each battery unit both ends is Vcell, then the resistance value RB of respective equalizing resistance can be obtainedi+1
Are as follows:
Namely:
Have with reference to Fig. 2 for any detection branch:
I*Vcell=Iai*(Ri+RAi)
Therefore, pass through Vcell and Iai, can be obtained the resistance value of divider resistance in each detection branch, and from equalizing resistance
Resistance value.
About the value of Vcell, the utility model is thought, when factory the initial voltage of all battery units be just as
, i.e. Vcell when design is from equalizing resistance, presets selection sampling end voltage VAiFor the optimum linear input voltage of ADC chip,
Preferably 2.5V；It considers further that route power consumption and interference free performance, presets the electric current Ia that divider resistance is crossed at each detection branch upstreami,
Preferably 100 μ A；The value of initial Vcell can be obtained according to the intrinsic standoff ratio coefficient of the road divider resistance of detection, Extrapolation.
In order to simplify route, resistance type is reduced, stock complexity is reduced, avoids the performance differences such as temperature drift, this reality as far as possible
It applies example to design in each detection branch, flows through the electric current Ia of divider resistanceiIt is equal, then the resistance value selection of respective equalizing resistance are as follows:
RBi+1=Vcell/ (i*Ia1),i≥1。
Referring again to FIGS. 2, for there is 4 battery cells in series, and each battery unit nominal voltage is the battery pack of 3.6V,
When design is from equalizing resistance, selection sampling end voltage VA is presetiThe electric current phase flowed through for 2.5V, each detection branch divider resistance
Deng for 100 μ A, then the divider resistance in each detection branch and the resistance value from equalizing resistance are as follows:
RA1=RA2=...=RAn=VAi/Iai=2.5V/100uA=25K Ω
R1=(Vcell-VA1)/Ia1=(3.6V-2.5V)/100uA=11K Ω
RB2=Vcell/Ia1=3.6V/100uA=36K Ω
R2=(2*Vcell-VA2)/Ia2=(2*3.6V-2.5V)/100uA=47K Ω
RB3=Vcell/ (2*Ia1)=18K Ω
It similarly can be calculated: R3=83K Ω, RB4=12K Ω, R4=119K Ω.
It should be noted that the target I of the utility model1,I2,...,In-1=0 is ideal situation, in actual circuit due to
The voltage Vcell of each battery unit is there are deviation, therefore I1,I2,...,In-1May not absolutely be zero, but the utility model from
The angle of system design allows electric current approach to be zero, can still reach each battery unit equilibrium as far as possible in detection process to greatest extent
Purpose.
The present embodiment application when: when not needing battery voltage detection, first controllable switch SWB1, SWB2, SWB3,
SWB4 and second controllable switch SW1, SW2, SW3, SW4 are all disconnected, and detection circuit no current passes through, and does not consume power consumption；
SW4 is closed when detecting most significant end battery Cell-4 voltage, and other switches disconnect, other batteries from equalizing resistance
Upper no electric current passes through, and the operating current of all batteries is consistent, under the conditions of guaranteeing that battery current is consistent, reduces detection power consumption；
When detection removes other battery cell voltages of most significant end battery Cell-4, the equalizer switch of least significant end battery Cell-1
SWB1 is disconnected, other to close the switch, and guarantees that the operating current of all batteries when detection circuit work is consistent；
When any one battery cell voltage is excessively high, corresponding balanced electricity can be connected by controlling corresponding controllable switch
Resistance is realized from equalizing resistance.
The present embodiment is equally applicable to the situation of n battery units in parallel.Since each battery unit Cell is parallel with
Equalizing resistance and control switch, so if occur that operating voltage is inconsistent, some cell voltage is excessively high in battery use process,
The equalizer switch closure that can be controlled separately associated batteries realizes equalization function.
Embodiment 1-2
Based on embodiment 1, in the present embodiment, the first controllable switch is that drain electrode is serially connected in source electrode from equilibrium line road
PMOS switch pipe connects and is additionally provided with time concatenated with divider resistance high-pressure side in the respectively on high-tension side each detection branch of balanced route
Road resistance, the grid of the first controllable switch of respective equilibrium line road are connected to this from balanced route high-pressure side and even detect branch
Between the loop resistance and divider resistance on road；
Second controllable switch is NMOS switch pipe, the drain electrode of each second controllable switch and source electrode be serially connected in two divider resistances it
Between detection line road, grid connect peripheral control unit control output end.
The peripheral control unit can be the microcontrollers such as single-chip microcontroller, utilize 3V the or 5V output voltage of one-chip machine port
The conducting of each NMOS switch pipe is directly driven, to realize the control of the second controllable switch.
When the second controllable switch is connected, then corresponding detection branch conducting, first be connected in detection branch controllably open
The grid of pass is high level, then the first controlled tr tube is connected, and then respectively balanced line conduction, both realizes sample circuit
From equilibrium, while when controlling sample circuit, it is only necessary to which the control to two controllable switches can be realized in a pin of controller
System, can simplified control route, reduce the output pin resource distribution of controller, and other device extensions.
Third controllable switch is that its source electrode and drain electrode of PMOS switch pipe is serially connected with equilibrium line road, the external control of grid connection
The control output end of device.It is not provided with loop resistance in the connection on high-tension side detection branch of Cell-1, third controlled tr tube is by outer
Portion's controller directly controls.Loop resistance resistance value in other detection branch can according to the cut-in voltage VSG of PMOS switch pipe with
And electric current is detected to determine, Rp=VSG/Ia is such as set, and voltage is VSG bias voltage when PMOS is opened on Rp resistance, with guarantor
Demonstrate,proving each first controlled tr tube being capable of the unlatching when detection circuit is connected.
As Fig. 2 realizes controllable low-power consumption in use, control CB1 is high level, C1, C2, C3, C4 while high level
From balancing battery voltage detecting；C1 control is low level, and the independently control of CB1, C2, C3, C4 can open corresponding battery
Independent Balance route.
The present embodiment may be equally applied to the battery pack of more battery cells in series.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvement and deformations can also be made, these change
It also should be regarded as the protection scope of the utility model into deformation.
Claims (9)
1. a kind of battery voltage sampling circuit, battery pack includes 2 or more concatenated battery units；It is characterized in that:
Battery voltage sampling circuit includes the detection branch for respectively corresponding each battery unit, and one end connection of each detection branch is corresponding
The positive terminal of battery unit, the other end are grounded, and are in series at least two divider resistance in detection branch；2 divider resistances
Tie point is voltage sampling port；
Between the adjacent detection branch of corresponding adjacent cell, it is also connected with from balanced route, is serially connected with from equilibrium line road
From equalizing resistance and it is equipped with controllable the first controllable switch from balanced circuit on-off；Respectively equilibrium route both ends respectively with its
In a battery unit positive and negative end and connect；
The second controllable switch of controllable detection branch on-off is further respectively had in each detection branch.
2. battery voltage sampling circuit according to claim 1, it is characterized in that: defining in battery pack by ground terminal,
Battery unit Cell-1, Cell-2 ..., Cell-n be sequentially connected in series, detection branch one end connection of corresponding battery unit Cell-i
Between the negative pole end of the positive terminal and Cell- (i+1) of battery unit Cell-i, other end ground connection；It connects in each detection branch
There are 2 divider resistances；
In addition to battery unit Cell-1, all respectively and one is connected to from balanced route on the positive and negative end of other battery units.
3. battery voltage sampling circuit according to claim 1 or 2, it is characterized in that: first controllable switch and second
Controllable switch is respectively relay contact；First controllable switch is serially connected with from equilibrium line road, the second controllable switch and partial pressure electricity
Resistance is serially connected in detection branch.
4. battery voltage sampling circuit according to claim 2, it is characterized in that: defining corresponding adjacent cell Cell-i
Connected between two detection branch of Cell- (i+1) from equalizing resistance be RBi+1, the electric current flowed through thereon is Ibi+1；It is corresponding
The electric current flowed through on the divider resistance of the detection branch of battery unit Cell-i is Iai；Battery unit Cell-1, Cell-2 ...,
Equal initial voltage on Cell-n is Vcell；Then RBi+1Resistance value selection are as follows:
Consider that the electric current extracted from each battery unit is 0, then Ib2=Ia1, Ibi=Ibi-1+Iai-1, i >=3, therefore RBi+1Resistance
Value are as follows:
5. battery voltage sampling circuit according to claim 4, it is characterized in that: flowing through divider resistance in each detection branch
Electric current IaiIt is equal, then the resistance value selection of respective equalizing resistance are as follows:
RBi+1=Vcell/ (i*Ia1),i≥1。
6. battery voltage sampling circuit according to claim 5, it is characterized in that: for there is 4 battery cells in series, and it is each
Battery unit nominal voltage is the battery pack of 3.6V, the divider resistance in each detection branch and the resistance value from equalizing resistance are as follows:
RA1=RA2=RA3=RA4=25K Ω, R1=11K Ω, RB2=36K Ω, R2=47K Ω, RB3=18K Ω, R3=83K Ω,
RB4=12K Ω, R4=119K Ω.
7. battery voltage sampling circuit according to claim 1 or 2, it is characterized in that: first controllable switch is drain electrode
It is serially connected in the PMOS switch pipe from equilibrium line road with source electrode, connects and is also set in the respectively on high-tension side each detection branch of balanced route
There is the loop resistance concatenated with divider resistance high-pressure side, the grid of the first controllable switch of respective equilibrium line road is connected to this
From between the loop resistance and divider resistance of balanced the connected detection branch in route high-pressure side；
Second controllable switch is NMOS switch pipe, the drain electrode of each second controllable switch and source electrode be serially connected in two divider resistances it
Between detection line road, grid connect peripheral control unit control output end.
8. battery voltage sampling circuit according to claim 1 or 2, it is characterized in that: the positive and negative anodes of battery unit Cell-1
On both ends and it is connected to a balanced route, the equilibrium line road is serially connected with the third of equalizing resistance and controllable balanced circuit on-off
Controllable switch.
9. battery voltage sampling circuit according to claim 8, it is characterized in that: the third controllable switch is that concatenation is balanced
The relay contact or PMOS switch pipe of resistance；When third controlled tr tube is PMOS switch pipe, source electrode and drain electrode is serially connected with
Equilibrium line road, grid connect the control output end of peripheral control unit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768590A (en) * | 2018-12-26 | 2019-05-17 | 苏州易美新思新能源科技有限公司 | A kind of low-power consumption is from balancing battery voltage sampling circuit |
| CN111641237A (en) * | 2020-06-15 | 2020-09-08 | 苏州市朗世润电子有限公司 | Autonomous equalization circuit for battery pack |
| CN113311212A (en) * | 2020-02-26 | 2021-08-27 | 合泰半导体(中国)有限公司 | Voltage monitoring device |
-
2018
- 2018-12-26 CN CN201822201142.0U patent/CN209516650U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768590A (en) * | 2018-12-26 | 2019-05-17 | 苏州易美新思新能源科技有限公司 | A kind of low-power consumption is from balancing battery voltage sampling circuit |
| CN113311212A (en) * | 2020-02-26 | 2021-08-27 | 合泰半导体(中国)有限公司 | Voltage monitoring device |
| TWI753369B (en) * | 2020-02-26 | 2022-01-21 | 盛群半導體股份有限公司 | Voltage monitoring apparatus |
| CN111641237A (en) * | 2020-06-15 | 2020-09-08 | 苏州市朗世润电子有限公司 | Autonomous equalization circuit for battery pack |
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