CN207382027U - A kind of more cell parallel charge-discharge control circuits and electronic product - Google Patents
A kind of more cell parallel charge-discharge control circuits and electronic product Download PDFInfo
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- CN207382027U CN207382027U CN201721472144.2U CN201721472144U CN207382027U CN 207382027 U CN207382027 U CN 207382027U CN 201721472144 U CN201721472144 U CN 201721472144U CN 207382027 U CN207382027 U CN 207382027U
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Abstract
The utility model discloses a kind of more cell parallel charge-discharge control circuits and electronic product, the circuit includes control unit, Charge Management unit, at least two batteries and the corresponding circuit protection unit of each battery, on-off circuit, difference amplifier；The cathode of the corresponding battery of negative input connection of each circuit protection unit, the cathode output end of each circuit protection unit are grounded by the switch ways of corresponding switch circuit, and the control terminal of on-off circuit is connected with control unit；Discharge resistance is in series between the cathode of two neighboring battery；The anode of the corresponding battery of one of input terminal connection of difference amplifier, the cathode of the corresponding battery of another input terminal connection, the output terminal connection control unit of difference amplifier.The utility model knows cell voltage by difference amplifier, realizes the monitoring to cell voltage；Realize that the safety between battery from balanced discharge, realizes the electric voltage equalization between battery by discharge resistance.
Description
Technical field
The utility model belongs to circuit protection technical field, is that be related to a kind of more cell parallel charge and discharges automatically controlled specifically
Circuit and electronic product processed.
Background technology
With the development in intelligence wearing market, miniaturization, the intelligence wearing product of multifunction become what consumer was concerned about
Hot issue.For design manufacturer, miniaturization means that product needs greater compactness of design.It is multi-functional that bring is pair
The high demand of power consumption.In order to solve the contradiction between power consumption demand and product working time, take into account outside product size and product
Design is seen, double cell application in parallel is increasing.
Double cell parallel connection can effectively improve continuation of the journey electricity, but there is also some fatal problems.It is in parallel in traditional double cell
In circuit design, the initial voltages of two batteries need it is identical or approximately the same, in order to meet two initial voltage of battery need it is identical or
Approximately uniform condition seriously affects battery fortune, it is necessary to carry out screening pairing to battery, however inevitably slip in screening process
Row causes battery powered cruising ability to generate larger fluctuation, and battery operation irregularity can be caused when serious, and loss is too fast.
The content of the invention
The utility model provides a kind of more cell parallel charge-discharge control circuits, improves the security of battery.
In order to solve the above technical problems, the utility model is achieved using following technical scheme：
A kind of more cell parallel charge-discharge control circuits, including control unit, Charge Management unit, at least two batteries,
And each corresponding circuit protection unit of battery, on-off circuit, difference amplifier；Each circuit protection unit is born
The cathode of the corresponding battery of pole input terminal connection, the switch that the cathode output end of each circuit protection unit passes through corresponding switch circuit
Path ground, the control terminal of the on-off circuit are connected with control unit, the switch ways of control unit control on-off circuit
Break-make；Discharge resistance is in series between the cathode of two neighboring battery；One of input terminal of the difference amplifier connects
The anode of corresponding battery is connect, the cathode of the corresponding battery of another input terminal connection, the output terminal connection control of the difference amplifier
Unit processed；Described control unit is connected with Charge Management unit, and the charging end of the Charge Management unit connects each battery
Anode, the ground terminal connection ground of the Charge Management unit；The anode of the multiple battery links together, and forms feeder ear,
For electricity consumption load supplying.
Further, the circuit further includes total difference amplifier, one of input terminal of total difference amplifier
The feeder ear, another input end grounding of total difference amplifier are connected, the output terminal of total difference amplifier connects
Connect control unit.
Further, each on-off circuit includes two NMOS tubes, and the grid of described two NMOS tubes is equal
Described control unit is connected, the drain electrode of described two NMOS tubes links together, and the source electrode connection of one of NMOS tube corresponds to
The cathode output end of circuit protection unit, the source electrode ground connection of another NMOS tube.
Further, the anode of the corresponding battery of in-phase input end connection of each difference amplifier, reverse phase are defeated
Enter the cathode of the corresponding battery of end connection.
Further, the in-phase input end of total difference amplifier connects the feeder ear, reverse inter-input-ing ending grounding.
Preferably, there are two the battery is set.
Based on the structure design of above-mentioned more cell parallel charge-discharge control circuits, the utility model also proposed a kind of use
The electronic product of more cell parallel charge-discharge control circuit designs, including more cell parallel charge and discharge controls electricity
Road, more cell parallel charge-discharge control circuits include control unit, Charge Management unit, at least two batteries and every
A corresponding circuit protection unit of battery, on-off circuit, difference amplifier；The cathode input of each circuit protection unit
The cathode of the corresponding battery of end connection, the cathode output end of each circuit protection unit are connect by the switch ways of corresponding switch circuit
Ground, the control terminal of the on-off circuit are connected with control unit, the break-make of the switch ways of control unit control on-off circuit；
Discharge resistance is in series between the cathode of two neighboring battery；The corresponding electricity of one of input terminal connection of the difference amplifier
The anode in pond, the cathode of the corresponding battery of another input terminal connection, the output terminal connection control unit of the difference amplifier；Institute
It states control unit to be connected with Charge Management unit, the charging end of the Charge Management unit connects the anode of each battery, described
The ground terminal connection ground of Charge Management unit；The anode of the multiple battery links together, and forms feeder ear, for electric loading
Power supply.
Further, the electronic product is earphone or bracelet.
Compared with prior art, the advantages of the utility model and good effect is：More cell parallels of the utility model fill
Charge/discharge control circuit and electronic product know cell voltage by difference amplifier, realize the monitoring to cell voltage；By putting
Resistance realizes the safe electric voltage equalization between balanced discharge, realization battery between battery, improves the safety of battery operation
Property and reliability, ensure battery normal operation.
After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantages of the utility model
It will become clearer.
Description of the drawings
Fig. 1 is a kind of circuit theory of the embodiment for more cell parallel charge-discharge control circuits that the utility model is proposed
Figure；
Fig. 2 is that the circuit of another embodiment of more cell parallel charge-discharge control circuits that the utility model is proposed is former
Reason figure.
Specific embodiment
Specific embodiment of the present utility model is described in more detail below in conjunction with the accompanying drawings.
More cell parallel charge-discharge control circuits of the present embodiment mainly include control unit, Charge Management unit, at least
Two batteries and each corresponding circuit protection unit of battery, on-off circuit, difference amplifier etc., referring to Fig. 1 institutes
Show, the anode of the corresponding battery of feeder ear connection of each circuit protection unit, the negative input of each circuit protection unit connects
The cathode of corresponding battery is connect, the cathode output end of each circuit protection unit is grounded by the switch ways of corresponding switch circuit,
The control terminal of on-off circuit is connected with control unit, and control unit controls the break-make of the switch ways of each on-off circuit；In phase
Discharge resistance is in series between the cathode of adjacent two batteries；The corresponding battery of one of input terminal connection of difference amplifier is just
Pole, the cathode of the corresponding battery of another input terminal connection, the output terminal connection control unit of difference amplifier；Control unit is with filling
Electric administrative unit connection, communicates with Charge Management unit；The charging end of Charge Management unit connects the anode of each battery,
The ground terminal connection ground of Charge Management unit, Charge Management unit charge for each battery；The anode of multiple batteries is connected to one
It rises, forms feeder ear, the power supply positive terminal of the feeder ear connection electric loading, with the power cathode terminal ground of electric loading,
The feeder ear is electricity consumption load supplying；I.e. multiple cell parallels are electricity consumption load supplying jointly.
Two input terminals of difference amplifier connect the positive and negative anodes of corresponding battery, the output terminal generation of difference amplifier respectively
Amplify voltage signal, export to control unit, control unit knows the confession of respective battery according to the amplification voltage signal received
Piezoelectric voltage and working condition realize the monitoring to cell operating status；Control unit sends the work state information of battery
Give Charge Management unit.The amplification voltage signal that control unit is transmitted according to the difference amplifier received generates control signal,
Respective switch circuit is sent to, the break-make of respective switch circuit is controlled, so as to control the work of respective battery.
During battery discharge, control unit controls corresponding on-off circuit conducting, and battery is electricity consumption load supplying.Current loop
For：Anode → feeder ear → use electric loading → on-off circuit → circuit protection unit → battery cathode.
When battery charges, control unit controls corresponding on-off circuit conducting, and control Charge Management unit is filled to the battery
Electricity, current loop are：Charging end → anode → battery cathode → circuit protection unit of Charge Management unit → switch electricity
The ground terminal of road → Charge Management unit.
When the voltage of multiple batteries is unbalanced, electric voltage equalization electric discharge is carried out by discharge resistance, after electric voltage equalization, electric discharge
There is no electric currents on resistance to flow through, and will not consume excessive electricity.It does not also discharge for example, not charging in battery（Corresponding switch circuit
Shut-off）When, electric voltage equalization is realized by discharge resistance between battery.The effect of discharge resistance be slowly safely realize battery it
Between balanced discharge, be finally reached the balance of voltage.
Therefore, more cell parallel charge-discharge control circuits of the present embodiment, know cell voltage by difference amplifier, real
Now to the monitoring of cell voltage and working condition；Realize that the safety between battery from balanced discharge, is realized by discharge resistance
Electric voltage equalization between battery improves the safety and reliability of battery operation, ensures battery normal operation, ensures the confession of battery
Electric cruising ability.
More cell parallel charge-discharge control circuits of the present embodiment, realize the monitoring to each cell operating status, right
Battery carries out management of charging and discharging maintenance, by discharge resistance realization safety from balanced discharge, eliminates battery screening operation, saves
About cost improves the reliability of battery operation.
In the present embodiment, more cell parallel charge-discharge control circuits further include total difference amplifier, total difference amplifier
One of input terminal connect the anode tie point of the multiple battery（That is feeder ear）；Another of total difference amplifier is defeated
Enter end ground connection, the output terminal connection control unit of total difference amplifier.By setting total difference amplifier, convenient for knowing feeder ear
Voltage（Supply voltage after i.e. multiple cell parallels）, realize to the monitoring with electric loading utilization voltage.
In the present embodiment, the anode of the corresponding battery of in-phase input end connection of each difference amplifier, inverting input
The cathode of the corresponding battery of connection, convenient for the calculating of difference amplifier output voltage.
In the present embodiment, the in-phase input end of total difference amplifier connects the anode tie point of the multiple battery（I.e.
Feeder ear）, reverse inter-input-ing ending grounding, convenient for the calculating of total difference amplifier output voltage.
In the present embodiment, each on-off circuit includes two NMOS tubes, and the grid of two NMOS tubes is all connected with controlling
Unit, the drain electrode of two NMOS tubes link together, and the source electrode connection corresponding circuits protection location of one of NMOS tube is born
Pole output terminal, the source electrode ground connection of another NMOS tube.Select NMOS tube, it is at low cost, convenient for control, performance stablize.
In the present embodiment, there are two battery is set, i.e. corresponding, circuit protection unit, on-off circuit, difference are put
There are two big device is also provided with.Include two batteries in circuit, not only met the requirement to cruising ability, but also battery is avoided excessively to control
System is complicated.
In the following, by taking circuit includes two batteries as an example, it is former to the specific works of more cell parallel charge-discharge control circuits
Reason illustrates.
More cell parallel charge-discharge control circuits include control unit, Charge Management unit, two batteries BAT_1 and BAT_
2, corresponding two circuit protection unit PCM_1, PCM_2, two on-off circuit Q_1, Q_2, difference amplifier 1, differential amplification
Device 2, total difference amplifier N+1, shown in Figure 2, Q_1 includes two NMOS tubes：NMOS_1、NMOS_2；Q_2 includes two
NMOS tube：NMOS_3、NMOS_4.
The cathode of the negative input connection BAT_1 of PCM_1, the source electrode of the cathode output end connection NMOS_1 of PCM_1,
The grid of the drain electrode of the drain electrode connection NMOS_2 of NMOS_1, the source electrode ground connection of NMOS_2, NMOS_1 and NMOS_2 are all connected with controlling
Unit.
The cathode of the negative input connection BAT_2 of PCM_2, the source electrode of the cathode output end connection NMOS_4 of PCM_2,
The grid of the drain electrode of the drain electrode connection NMOS_3 of NMOS_4, the source electrode ground connection of NMOS_3, NMOS_3 and NMOS_4 are all connected with controlling
Unit.
Discharge resistance R_1 is in series between the cathode of BAT_1 and the cathode of BAT_2.
The anode of the in-phase input end connection BAT_1 of difference amplifier 1, inverting input connect the cathode of BAT_1, output
End exports amplification voltage signal VOUT_1 to control unit, and control unit knows BAT_1 according to the amplification voltage signal received
Supply voltage, realize the monitoring to battery BAT_1 working conditions.Control unit is according to the amplification voltage signal received
VOUT_1 generates control signal Drive_1, is sent to the grid of NMOS_1 and NMOS_2, and control NMOS_1's and NMOS_2 is logical
It is disconnected.
The anode of the in-phase input end connection BAT_2 of difference amplifier 2, inverting input connect the cathode of BAT_2, output
End exports amplification voltage signal VOUT_2 to control unit, and control unit knows BAT_2 according to the amplification voltage signal received
Supply voltage, realize the monitoring to battery BAT_2 working conditions.Control unit is according to the amplification voltage signal received
VOUT_2 generates control signal Drive_2, is sent to the grid of NMOS_3 and NMOS_4, and control NMOS_3's and NMOS_4 is logical
It is disconnected.
The in-phase input end of total difference amplifier N+1 connects the anode tie point of two batteries（That is feeder ear）, reverse phase is defeated
Enter end ground connection, output terminal exports amplification voltage signal VOUT_N+1 to control unit, and control unit is according to the amplification electricity received
Pressure signal knows the voltage after two cell parallels, realizes to the monitoring with electric loading utilization voltage.
When battery BAT_1 discharges, control unit control NMOS_1 and NMOS_2 is turned on, and current loop is：Battery BAT_1 is just
Pole → feeder ear → use electric loading → NMOS_2 → NMOS_1 → PCM_1 → battery BAT_1 cathode.
When battery BAT_2 discharges, control unit control NMOS_3 and NMOS_4 is turned on, and current loop is：Battery BAT_2 is just
Pole → feeder ear → use electric loading → NMOS_3 → NMOS_4 → PCM_2 → battery BAT_2 cathode.
When battery BAT_1 charges, control unit control NMOS_1 and NMOS_2 conductings, control Charge Management unit gives the electricity
Pond BAT_1 charges, and current loop is：The charging end of Charge Management unit → battery BAT_1 anodes → battery BAT_1 cathode →
The ground terminal of PCM_1 → NMOS_1 → NMOS_2 → Charge Management unit.
When battery BAT_2 charges, control unit control NMOS_3 and NMOS_4 conductings, control Charge Management unit gives the electricity
Pond BAT_2 charges, and current loop is：The charging end of Charge Management unit → battery BAT_2 anodes → battery BAT_2 cathode →
The ground terminal of PCM_2 → NMOS_4 → NMOS_3 → Charge Management unit.
When battery BAT_1 and BAT_2 voltage is unbalanced, two batteries carry out electric voltage equalization electric discharge by resistance R_1.Assuming that
Do not discharge also do not charge when, Q_1 and Q_2 are turned off, and the voltage of BAT_1 is more than the voltage of BAT_2, from balanced discharge circuit
For：The cathode of the cathode of anode → BAT_2 of anode → BAT_2 of BAT_1 → discharge resistance R_1 → BAT_1；Pass through the electricity that discharges
Hinder R_1 realize between two batteries from balanced discharge, securely and reliably, until reach electric voltage equalization, on discharge resistance R there is no
Electric current flows through.
Based on the design of above-mentioned more cell parallel charge-discharge control circuits, the present embodiment also proposed a kind of electronic product,
Including more cell parallel charge-discharge control circuits and use electric loading.
By designing more cell parallel charge-discharge control circuits in electronic product, the peace of battery operation is improved
Full property and reliability ensure battery normal operation, and then ensure the safe operation of electronic product.
The electronic product dresses product for earphone, bracelet etc..
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model,
It should also belong to the protection scope of the utility model.
Claims (8)
1. a kind of more cell parallel charge-discharge control circuits, it is characterised in that：Including control unit, Charge Management unit, at least
Two batteries and each corresponding circuit protection unit of battery, on-off circuit, difference amplifier；
The cathode of the corresponding battery of negative input connection of each circuit protection unit, the cathode output of each circuit protection unit
End is grounded by the switch ways of corresponding switch circuit, and the control terminal of the on-off circuit is connected with control unit, control unit
Control the break-make of the switch ways of on-off circuit；Discharge resistance is in series between the cathode of two neighboring battery；
The anode of the corresponding battery of one of input terminal connection of the difference amplifier, the corresponding battery of another input terminal connection
Cathode, the difference amplifier output terminal connection control unit；
Described control unit is connected with Charge Management unit, and the charging end of the Charge Management unit is connecting each battery just
Pole, the ground terminal connection ground of the Charge Management unit；
The anode of the multiple battery links together, and forms feeder ear, is electricity consumption load supplying.
2. circuit according to claim 1, it is characterised in that：The circuit further includes total difference amplifier, described total poor
One of input terminal of amplifier is divided to connect the feeder ear, another input end grounding of total difference amplifier, institute
State the output terminal connection control unit of total difference amplifier.
3. circuit according to claim 1, it is characterised in that：Each on-off circuit includes two NMOS tubes,
The grid of described two NMOS tubes is all connected with described control unit, and the drain electrode of described two NMOS tubes links together, wherein one
The cathode output end of the source electrode connection corresponding circuits protection location of a NMOS tube, the source electrode ground connection of another NMOS tube.
4. circuit according to claim 1, it is characterised in that：The in-phase input end connection of each difference amplifier
The anode of corresponding battery, the cathode of the corresponding battery of inverting input connection.
5. circuit according to claim 2, it is characterised in that：Described in the in-phase input end connection of total difference amplifier
Feeder ear, reverse inter-input-ing ending grounding.
6. circuit according to any one of claim 1 to 5, it is characterised in that：There are two the battery is set.
7. a kind of electronic product, it is characterised in that：It is born including circuit such as according to any one of claims 1 to 6 and electricity consumption
It carries.
8. electronic product according to claim 7, it is characterised in that：The electronic product is earphone or bracelet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721472144.2U CN207382027U (en) | 2017-11-07 | 2017-11-07 | A kind of more cell parallel charge-discharge control circuits and electronic product |
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| CN201721472144.2U CN207382027U (en) | 2017-11-07 | 2017-11-07 | A kind of more cell parallel charge-discharge control circuits and electronic product |
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| CN207382027U true CN207382027U (en) | 2018-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467811A (en) * | 2019-09-06 | 2021-03-09 | 华为技术有限公司 | Double-battery voltage balancing method and double-battery voltage balancing circuit |
-
2017
- 2017-11-07 CN CN201721472144.2U patent/CN207382027U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467811A (en) * | 2019-09-06 | 2021-03-09 | 华为技术有限公司 | Double-battery voltage balancing method and double-battery voltage balancing circuit |
| CN112467811B (en) * | 2019-09-06 | 2023-04-07 | 华为技术有限公司 | Double-battery voltage balancing method and double-battery voltage balancing circuit |
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