CN104218632A - Power supply device - Google Patents
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- CN104218632A CN104218632A CN201310286592.3A CN201310286592A CN104218632A CN 104218632 A CN104218632 A CN 104218632A CN 201310286592 A CN201310286592 A CN 201310286592A CN 104218632 A CN104218632 A CN 104218632A
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- 238000004146 energy storage Methods 0.000 claims abstract description 204
- 230000009467 reduction Effects 0.000 claims abstract description 44
- 230000001681 protective effect Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 description 26
- 238000006243 chemical reaction Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 14
- 238000013461 design Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The invention discloses a power supply device. In the power supply device, the control unit controls the switching circuit, the energy storage unit module is switched to a parallel circuit when charging is carried out, and the energy storage unit module is switched to a series circuit when discharging is carried out, so that the power supply device uses the voltage reduction circuit at the charging end and the discharging end. The switching circuit is used for matching with the charging voltage and the discharging voltage output by the voltage reduction circuit, so that the power supply device has the performances of stability, high efficiency and low loss.
Description
Technical field
The present invention relates to a kind of power supply device, particularly about battery module that a kind of battery unit array can switch between connection in series-parallel.
Background technology
Please refer to Fig. 1, Fig. 1 depicts a kind of configuration diagram of traditional type power supply device.Traditional power supply device 1 need use a synchronous buck circuit 110(buck circuit) and a synchronous voltage booster circuit 112(boost circuit).In FIG, outside input voltage is charged by the energy-storage units module 13 in 120 pairs, the charging end power supply device 1 of power supply device 1, because the input voltage of outside is higher, need first step-down usually could be made up of multiple battery energy-storage units module 13(when charging to power supply device 1) charge, therefore between charging end 120 and energy-storage units module 13, add synchronous buck circuit 110.And the voltage that the energy-storage units module 13 that the output voltage values of routine can be greater than power supply device 1 usually exports.In other words, the discharge end 122 of power supply device 1 needs to coordinate conventional output voltage values, and also needs to add synchronous voltage booster circuit 112 between energy-storage units module 13 and discharge end 122.In addition, the control of whole discharge and recharge controls by control unit 15.
For example, suppose in power supply device 1, energy-storage units module 13 is made up of two battery (accompanying drawing does not show), and the output voltage of single battery is 3 ~ 4.2 volts, the synchronous buck circuit 110 of power supply device 1 and synchronous voltage booster circuit 112 determine power stage all with the output voltage/electric current value 5V/2A of routine.If when two battery in energy-storage units module 13 are to be arranged in parallel, then as previously mentioned, between discharge end 122 and energy-storage units module 13, use synchronous voltage booster circuit 112, the voltage now inputting synchronous voltage booster circuit 112 is 3 ~ 4.2 volts of single battery; If when two battery in energy-storage units module 13 are with arranged in series, then between discharge end 122 and energy-storage units module 13, use synchronous buck circuit 110, the voltage now inputting synchronous buck circuit 110 is the series voltage 6 ~ 8.4 volts of two battery, but then need between charging end 120 and energy-storage units module 13 to use synchronous voltage booster circuit 112, making the voltage of charging end 120 boost into 8.4V by synchronous voltage booster circuit 112 from 5V could charge to energy-storage units module 13.From the viewpoint of the system conversion efficiency of power supply device 1, power stage is determined due to power supply device 1, known synchronous voltage booster circuit 112 is high-current circuits, and synchronous buck circuit 110 is a low current circuit and comes low compared with the electric current of synchronous voltage booster circuit 112.Under such imposing a condition, when the impedance of power line is fixed, and the MOS loss in synchronous voltage booster circuit 112 or synchronous buck circuit 110 is when fixing, because synchronous buck circuit 110 is low current systems, therefore the power of loss is also less, so concerning power supply device 1, synchronous buck circuit 110 is higher compared with the circuit efficiency of synchronous voltage booster circuit 112.
No matter but the multiple battery in energy-storage units module 13 have employed fixed series design or fixed Parallel Design, power supply device 1 all must adopt a synchronous voltage booster circuit 112 to boost, and so will greatly reduce the conversion efficiency of total system.
Summary of the invention
In order to improve above-mentioned defect, the present invention proposes a kind of reasonable in design and effectively can promote charge/discharge end efficiency, and only needs to use synchronous buck circuit that conversion efficiency is high with the power supply device of simplified structure.
According to summary of the invention of the present invention, disclose a kind of power supply device in one embodiment of the present of invention, it comprises charging end, discharge end, energy-storage units module, commutation circuit, reduction voltage circuit and control unit.Described energy-storage units module comprises the first energy-storage units and the second energy-storage units.Described commutation circuit is connected in parallel between described first energy-storage units and described second energy-storage units, described reduction voltage circuit is electrically connected at described charging end, between described discharge end and energy-storage units module, described control unit is electrically connected at described reduction voltage circuit, described energy-storage units module and described commutation circuit.Wherein said control unit is used for when described power supply device exists charge circuit, controlling described commutation circuit makes described first energy-storage units and described second energy-storage units be connected in parallel with each other, and be used for when described power supply device exists discharge loop, control described commutation circuit and described first energy-storage units and described second energy-storage units are one another in series connection.
According to summary of the invention of the present invention, in the embodiment of the present invention, the described reduction voltage circuit of power supply device comprises the first reduction voltage circuit and the second reduction voltage circuit, wherein said first reduction voltage circuit is electrically connected between described charging end and described energy-storage units module, and described second reduction voltage circuit is electrically connected between described discharge end and described energy-storage units module.
According to summary of the invention of the present invention, in the embodiment of the present invention, the described commutation circuit of power supply device comprises the first switches set and second switch group.Described first switches set comprises two the first switches, and described first switches set and described first energy-storage units and described second energy-storage units are electrically connected to form parallel line.Described second switch group comprises second switch, and described second switch group and described first energy-storage units and described second energy-storage units are electrically connected to form series circuit.
According to summary of the invention of the present invention, wherein when described power supply device exists described charge circuit, described control unit is used for the first switches set described in conducting and disconnect described second switch group, and described first energy-storage units and described second energy-storage units are connected in parallel with each other; When described power supply device exists described discharge loop, described control unit is used for second switch group described in conducting and disconnect described first switches set, and described first energy-storage units and described second energy-storage units are one another in series connection.
According to summary of the invention of the present invention, one of them first switch of wherein said first switches set is electrically connected between the positive pole of described first energy-storage units and described second energy-storage units, another first switch is electrically connected between the negative pole of described first energy-storage units and described second energy-storage units, and described second switch is electrically connected between the negative pole of described first energy-storage units and the positive pole of described second energy-storage units.
According to summary of the invention of the present invention, wherein be converted to described discharge loop at described charge circuit, or be converted in the process of described charge circuit at described discharge loop, described control unit is separately used for disconnecting described first switches set and described second switch group simultaneously, makes described power supply device enter static condition.
According to summary of the invention of the present invention, wherein when described power supply device switches to described charge circuit by described discharge loop, described control unit is used for first controlling described first switches set and the disconnection of described second switch group, control described first switches set conducting and the disconnection of described second switch group again, form parallel line to make described first energy-storage units and described second energy-storage units; When described power supply device switches to described discharge loop by described charge circuit, described control unit is used for first controlling described first switches set and the disconnection of described second switch group, control the conducting of described second switch group and described first switches set disconnection again, form series circuit to make described first energy-storage units and described second energy-storage units.
According to summary of the invention of the present invention; wherein said power supply device comprises protective circuit further; be electrically connected between described first switches set and described energy-storage units module; when described power supply device switches to described charge circuit by described discharge loop; described protective circuit be used for preventing described first energy-storage units and described second energy-storage units in parallel, produce instantaneous large-current (Inrush current) to prevent described first energy-storage units and described second energy-storage units when Voltage unbalance.Wherein said protective circuit comprises resistance and the switch with described resistor coupled in parallel, and described protective circuit is soft-start circuit.
According to summary of the invention of the present invention, wherein when described power supply device exists described discharge loop, described reduction voltage circuit is used for, by described first energy-storage units of arranged in series and the output voltage of described second energy-storage units, being converted to compliance voltage level.
According to summary of the invention of the present invention, wherein said first energy-storage units and described second energy-storage units are battery or battery module.
Power supply device disclosed in this invention, commutation circuit is controlled by control unit, when charging, energy-storage units module being switched to parallel line, then switching to series circuit when discharging, make power supply device all use reduction voltage circuit in charging end and discharge end.The charging voltage utilizing commutation circuit to coordinate reduction voltage circuit to export and discharge voltage, allow power supply device have performance that is stable, the high and low loss of efficiency.
Accompanying drawing explanation
Fig. 1 is the configuration diagram of traditional type power supply device.
Fig. 2 is the schematic diagram of a power supply device of the present invention embodiment.
Fig. 3 is the schematic diagram of another enforcement aspect of power supply device of Fig. 2.
Fig. 4,5,6 is in the embodiment of the present invention, the running schematic diagram of commutation circuit.
Fig. 7 is in power supply device of the present invention, protective circuit schematic diagram is set.
Fig. 8 utilizes many group energy-storage units to add that commutation circuit carries out the schematic diagram of connection in series-parallel switching in power supply device of the present invention.
Wherein, description of reference numerals is as follows:
1,2 power supply devices
13,23 energy-storage units modules
15,25 control units
21 reduction voltage circuits
24 commutation circuits
26 first switches set
27 second switch groups
29 protective circuits
110 synchronous buck circuit
112 synchronous voltage booster circuits
120,220 charging ends
122,222 discharge ends
210 first reduction voltage circuits
212 second reduction voltage circuits
231 first energy-storage units
232 second energy-storage units
233 the 3rd energy-storage units
234 the 4th energy-storage units
261,262 first switches
271 second switches
291 resistance
292 switches
Embodiment
Some vocabulary is employed to censure specific element in the middle of specification and follow-up claim.Person with usual knowledge in their respective areas should understand, and same element may be called by manufacturer with different nouns.This specification and follow-up claim are not used as the mode of distinguish one element from another with the difference of title, but are used as the criterion of differentiation with element difference functionally." comprising " mentioned in the middle of specification and follow-up claim is in the whole text an open term, therefore should be construed to " comprise but be not limited to ".In addition, " couple " or " connection " one word comprise directly any and indirectly electrically or anatomical connectivity means at this.Therefore, if describe a first device in literary composition to couple/connect one second device, then representing described first device can the second device described in directly electrically/anatomical connectivity, or by other device or connect means indirectly electrically/anatomical connectivity to described second device.
Please refer to Fig. 2, Fig. 2 is the schematic diagram of a power supply device disclosed in this invention embodiment.As shown in Figure 2, power supply device 2 only needs to use synchronous buck circuit, is engaged in multiple energy-storage units, utilizes commutation circuit that multiple energy-storage units is carried out the mode of connection in series-parallel switching, reaches high efficiency, low-loss discharge and recharge performance.Power supply device 2 contains 220, one, charging end discharge end 222, energy-storage units module 23(and contains multiple energy-storage units, in the present embodiment, then contain at least one first energy-storage units 231 and second energy-storage units 232, and can be battery or battery pack), a commutation circuit 24, reduction voltage circuit 21 and a control unit 25.Energy-storage units module 23 is electrically connected reduction voltage circuit 21, and reduction voltage circuit 21 is electrically connected charging end 220 and discharge end 222 simultaneously.Control unit 25 is electrically connected reduction voltage circuit 21, energy-storage units module 23 and commutation circuit 24, be used for detecting current power supply device 2 there is charge circuit or be in discharge loop, and be used for control commutation circuit 24 switch to series circuit or parallel line, wherein commutation circuit 24 is connection in series-parallel switching device shifters, in the present embodiment, commutation circuit 24 is connected in parallel between the first energy-storage units 231 and the second energy-storage units 232.
When power supply device 2 exists charge circuit, control unit 25 controls commutation circuit 24, and the first energy-storage units 231 of energy-storage units module 23 and the second energy-storage units 232 are connected with parallel line; When power supply device 2 exists discharge loop, control unit 25 controls commutation circuit 24, and the first energy-storage units 231 and the second energy-storage units 232 are connected with series circuit.Be noted that especially, in discharge loop, first energy-storage units 231 and the second energy-storage units 232 are one another in series, make the discharge voltage value of energy-storage units module 23 can be greater than a compliance voltage level, therefore be depressurized to described compliance voltage level by reduction voltage circuit 21, then export outer carrier (accompanying drawing is not drawn) to by discharge end 222.
The concrete practice of above-mentioned commutation circuit 24 is as follows: in the embodiment of fig. 2, and commutation circuit 24 contains first switches set 26 and a second switch group 27.First energy-storage units 231 and the second energy-storage units 232 are electrically connected the first switches set 26 and second switch group 27, to form a parallel line and a series circuit respectively.More particularly, first switches set 26 contains two the first switches 261,262, wherein the first switch 261 is electrically connected between the positive pole of the first energy-storage units 231 and the second energy-storage units 232, and second switch 262 is electrically connected between the negative pole of the first energy-storage units 231 and the second energy-storage units 232.Second switch group 27 contains a second switch 271, is electrically connected between the negative pole of the first energy-storage units 231 and the positive pole of the second energy-storage units 232.When power supply device 2 exists charge circuit, control unit 25 controls the first switches set 26 conducting, and second switch group 27 disconnects, and the first energy-storage units 231 and the second energy-storage units 232 are arranged in parallel; When discharge loop, control unit 25 controls second switch group 27 conducting, and the first switches set 26 disconnects, and makes the first energy-storage units 231 and the second energy-storage units 232 arranged in series.
Power supply device 2 of the present invention employs same reduction voltage circuit 21, using as between charging end 220 and energy-storage units module 23, and the voltage conversion circuit between energy-storage units module 23 and discharge end 222, add and do not need to use booster circuit, therefore can showing lands promotes the conversion efficiency of power supply device 2, and reaches consistency and the simplification of circuit design.Table 1 and table 2 list the series connection of multiple energy-storage units respectively and export the conversion efficiency of output after using reduction voltage circuit step-down to below, and multiple energy-storage units is in parallel and export the data of the conversion efficiency of output after using booster circuit to boost to.As shown in Table 2, when power supply device uses parallel line to connect multiple energy-storage units, and when using booster circuit (synchronous voltage booster circuit 112 as known in Fig. 1) to be acquiescence output voltage (such as 5 volts) by the voltage transitions of multiple energy-storage units, its conversion efficiency can decline along with the storage electric power of energy-storage units and reduce, and conversion efficiency can be down to 79% by 84%.As shown in Table 1, when power supply device uses series circuit to connect multiple energy-storage units, and when using reduction voltage circuit (reduction voltage circuit 21 of such as Fig. 2) to be acquiescence output voltage (such as 5 volts) by the voltage transitions of multiple energy-storage units, its conversion efficiency then can maintain between 87% to 88%.In comparison, use reduction voltage circuit can than the conversion efficiency using boosting circuit boosts about 3% to 9%.Special instruction, when the power supply device less for output voltage, even if promote the conversion efficiency of 1%, all has very large benefit for whole power supply device.
Table 1
Table 2
With the characteristic of battery discharge, only at full charging at that time, voltage can reach 4.2 volts to single battery, and the discharge voltage of single battery long period can drop on 3.7 volts.Therefore when power supply device uses parallel line to connect multiple energy-storage units, as shown in Table 2, the situation that conversion efficiency drops on 84% only has the extremely of short duration time, and most conversion efficiency drops on 81%; Review when power supply device uses series circuit to connect multiple energy-storage units, conversion efficiency then can stably maintain between 87 ~ 88%.
Then please refer to Fig. 3, Fig. 3 is the schematic diagram of another concrete aspect of the power supply device of Fig. 2.In an embodiment of the present invention, the reduction voltage circuit 21 of power supply device 2 can as shown in Figure 2 using single circuit as the step-down input receiving charging end 220 and supply discharge end 222, also can be as shown in Figure 3, reduction voltage circuit 21 comprises first reduction voltage circuit 210 and second reduction voltage circuit 212, wherein the first reduction voltage circuit 210 is connected between charging end 220 and energy-storage units module 23, and the second reduction voltage circuit 212 is connected between energy-storage units module 23 and discharge end 222.Such design can reach equally when power supply device exists discharge loop, and the first energy-storage units 231 of energy-storage units module 23 and the second energy-storage units 232 are to be connected in series, when making discharge voltage value be greater than described compliance voltage level, be depressurized to described compliance voltage level by the second reduction voltage circuit 212, and export the function of outer carrier to.The operation principles of all the other elements of Fig. 3 is identical with Fig. 2, therefore repeats no more.The present invention does not limit the quantity of described reduction voltage circuit.
Please refer to Fig. 4,5,6, it is in the embodiment of the present invention, the running schematic diagram of commutation circuit 24.Please refer to Fig. 4, Fig. 4 is when power supply device 2 exists charge circuit, control unit 25 controls commutation circuit 24, make the schematic diagram that the first energy-storage units 231 and the second energy-storage units 232 connect with parallel line, wherein the first switch 261,262 presents the state of conducting, second switch 271 presents the state of open circuit, and the first energy-storage units 231 and the second energy-storage units 232 can be made like this to connect with parallel way.Please refer to Fig. 6 again, Fig. 6 is when power supply device 2 exists discharge loop, control unit 25 controls commutation circuit 24, make the schematic diagram that the first energy-storage units 231 and the second energy-storage units 232 connect with series circuit, wherein second switch 271 presents the state of conducting, first switch 261,262 presents the state of open circuit, and the first energy-storage units 231 and the second energy-storage units 232 can be made like this to connect in a series arrangement.
Please refer to Fig. 5 again and coordinate Fig. 4 and Fig. 6, Fig. 5 is the static condition schematic diagram of commutation circuit in the transfer process of charge/discharge loop.In an embodiment of the present invention, when power supply device 2 is converted to discharge loop by charge circuit, commutation circuit 24 can't be directly switch into the series circuit of Fig. 6 by the parallel circuits of Fig. 4.Control unit 25 first can control the first switches set 26 and second switch group 27 disconnects, as shown in Figure 5, and a kind of static condition power supply device 2 being entered do not charge, do not discharge, then carry out the conversion between charge circuit and discharge loop.Therefore power supply device 2 is when charge circuit switches to discharge loop, first energy-storage units 231 and the second energy-storage units 232 are by the first switches set 26 conducting and second switch group 27 parallel line (Fig. 4) of opening a way, switch to after the first switches set 26 and second switch group 27 all present the static condition (Fig. 5) of open circuit, again by second switch group 27 conducting (Fig. 6), the first energy-storage units 231 and the second energy-storage units 232 are connected with series circuit.
On the contrary, when power supply device 2 is converted to charge circuit by discharge loop, commutation circuit 24 can't be directly switch into the parallel circuits of Fig. 4 by the series circuit of Fig. 6, first energy-storage units 231 and the second energy-storage units 232 can be opened a way and the series circuit (Fig. 6) of second switch group 27 conducting by the first switches set 26, switch to after the first switches set 26 and second switch group 27 all present the static condition (Fig. 5) of open circuit, again by the first switches set 26 conducting (Fig. 4), the first energy-storage units 231 and the second energy-storage units 232 are connected with parallel line.So, the first energy-storage units 231 and the second energy-storage units 232 voltage or electric current can be avoided to conflict mutually, cause energy-storage units to be damaged, cause danger or voltage, the situation of electric current instability occurs.
Please refer to Fig. 7, Fig. 7 is when the first energy-storage units 231 and the second energy-storage units 232 switch to parallel circuits connection, may because the first energy-storage units 231 and the respective voltage of the second energy-storage units 232 different and produce pressure reduction, and between the first energy-storage units 231 and the second energy-storage units 232, produce an instantaneous large-current (Inrush Current), therefore in the figure 7, between energy-storage units module 23 and the first switches set 26, (between the positive pole of such as the first energy-storage units 231 and the second energy-storage units 232 and the first switch 261) adds a protective circuit 29, protective circuit 29 can be a kind of soft-start circuit (soft-start circuit) or other possible enforcement aspect.In the embodiment of Fig. 7, protective circuit 29 has a resistance 291 and in parallel with resistance 291 switch 292, and resistance 291 has the function of current limliting.Before the first energy-storage units 231 and the second energy-storage units 232 are converted to parallel connection by static condition; the switch 292 of control unit 25 control protection electric circuit 29 disconnects, and then aforementioned control commutation circuit 24 makes the first energy-storage units 231 and the second energy-storage units 232 form parallel connection for another example.When the first energy-storage units 231 and the second energy-storage units 232 at parallel connection and Voltage unbalance time; an instantaneous large-current can be produced; and carry out current limliting by the resistance 291 of protective circuit 29; the pressure reduction imbalance of the first energy-storage units 231 and the second energy-storage units 232 can be avoided to produce instantaneous large-current flowing; to the infringement of the electronic component (such as the first switches set 26) on shunt circuit, or reduce the life-span of energy-storage units.And again by switch 292 conducting of protective circuit 29 after the balance of voltage of the first energy-storage units 231 and the second energy-storage units 232, make the resistance 291 of the obstructed overprotection circuit 29 of electric current, to avoid the loss of energy.
Finally please refer to Fig. 8, it is utilize many group energy-storage units to add that commutation circuit carries out the schematic diagram of connection in series-parallel switching in power supply device of the present invention.In power supply device 2 disclosed in this invention, in energy-storage units module 23, horizontal expansion can connect multiple energy-storage units and multiple commutation circuit 24.Such as in fig. 8, first energy-storage units 231 and the second energy-storage units 232 and between the framework of commutation circuit 24 and function as previously mentioned, and certainly can also continue to connect more energy-storage units at the second energy-storage units 232 lateral connection the 3rd energy-storage units 233 and a 4th energy-storage units 234(), between the second energy-storage units 232 and the 3rd energy-storage units 233, there is commutation circuit 24 too, between the 3rd energy-storage units 233 and the 4th energy-storage units 234 (but accompanying drawing is not drawn) as the same.The first switch 261,262 in these commutation circuits 24 and second switch 271 and adjacent energy-storage units parallel line and a series circuit.When being in charge circuit, control unit 25(is as shown in Figure 2,3) control the first switch 261,262 conducting of all commutation circuits 24, second switch 271 disconnects, and all energy-storage units are connected in parallel to each other arrangement; When being in discharge loop, control unit 25 controls second switch 271 conducting of all commutation circuits 24, and the first switch 261,262 disconnects, and all energy-storage units are one another in series arrangement.The operation principles of all the other elements is identical with Fig. 2, therefore repeats no more.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a power supply device, it comprises:
Charging end;
Discharge end;
Energy-storage units module, comprises the first energy-storage units and the second energy-storage units;
Commutation circuit, is connected in parallel between described first energy-storage units and described second energy-storage units;
Reduction voltage circuit, is electrically connected at described charging end, between described discharge end and energy-storage units module; And
Control unit, is electrically connected at described reduction voltage circuit, described energy-storage units module and described commutation circuit;
Wherein said control unit is used for when described power supply device exists charge circuit, controlling described commutation circuit makes described first energy-storage units and described second energy-storage units be connected in parallel with each other, and be used for when described power supply device exists discharge loop, control described commutation circuit and described first energy-storage units and described second energy-storage units are one another in series connection.
2. power supply device as claimed in claim 1, wherein said reduction voltage circuit comprises the first reduction voltage circuit and the second reduction voltage circuit, wherein said first reduction voltage circuit is electrically connected between described charging end and described energy-storage units module, and described second reduction voltage circuit is electrically connected between described discharge end and described energy-storage units module.
3. power supply device as claimed in claim 1, wherein said commutation circuit comprises:
First switches set, comprises two the first switches, and described first switches set and described first energy-storage units and described second energy-storage units are electrically connected to form parallel line; And
Second switch group, comprises second switch, and described second switch group and described first energy-storage units and described second energy-storage units are electrically connected to form series circuit.
4. power supply device as claimed in claim 3, wherein when described power supply device exists described charge circuit, described control unit is used for the first switches set described in conducting and disconnect described second switch group, and described first energy-storage units and described second energy-storage units are connected in parallel with each other; When described power supply device exists described discharge loop, described control unit is used for second switch group described in conducting and disconnect described first switches set, and described first energy-storage units and described second energy-storage units are one another in series connection.
5. power supply device as claimed in claim 3, one of them first switch of wherein said first switches set is electrically connected between the positive pole of described first energy-storage units and described second energy-storage units, another first switch is electrically connected between the negative pole of described first energy-storage units and described second energy-storage units, and described second switch is electrically connected between the negative pole of described first energy-storage units and the positive pole of described second energy-storage units.
6. the power supply device as described in claim 3,4 or 5, wherein be converted to described discharge loop at described charge circuit, or be converted in the process of described charge circuit at described discharge loop, described control unit is separately used for disconnecting described first switches set and described second switch group simultaneously, makes described power supply device enter static condition.
7. power supply device as claimed in claim 3, wherein when described power supply device switches to described charge circuit by described discharge loop, described control unit is used for first controlling described first switches set and the disconnection of described second switch group, control described first switches set conducting and the disconnection of described second switch group again, form parallel line to make described first energy-storage units and described second energy-storage units; When described power supply device switches to described discharge loop by described charge circuit, described control unit is used for first controlling described first switches set and the disconnection of described second switch group, control the conducting of described second switch group and described first switches set disconnection again, form series circuit to make described first energy-storage units and described second energy-storage units.
8. power supply device as claimed in claim 3; separately comprise protective circuit; be electrically connected between described first switches set and described energy-storage units module; when described power supply device switches to described charge circuit by described discharge loop; described protective circuit be used for preventing described first energy-storage units and described second energy-storage units in parallel, produce instantaneous large-current to prevent described first energy-storage units and described second energy-storage units when Voltage unbalance.
9. power supply device as claimed in claim 8, wherein said protective circuit comprises resistance and the switch with described resistor coupled in parallel.
10. power supply device as claimed in claim 8 or 9, wherein said protective circuit is soft-start circuit.
11. power supply devices as described in claim 1,2,3,4 or 5, wherein said first energy-storage units and described second energy-storage units are battery or battery module.
12. power supply devices as claimed in claim 1, wherein when described power supply device exists described discharge loop, described reduction voltage circuit is used for, by described first energy-storage units of arranged in series and the output voltage of described second energy-storage units, being converted to compliance voltage level.
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|---|---|---|---|
| TW102119205 | 2013-05-30 | ||
| TW102119205A TW201445853A (en) | 2013-05-30 | 2013-05-30 | Power supply apparatus |
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| CN104218632A true CN104218632A (en) | 2014-12-17 |
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2013
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Application publication date: 20141217 |