CN202940618U - Energy-saving charging control circuit used in power lithium ion battery formation - Google Patents
Energy-saving charging control circuit used in power lithium ion battery formation Download PDFInfo
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- CN202940618U CN202940618U CN 201220642271 CN201220642271U CN202940618U CN 202940618 U CN202940618 U CN 202940618U CN 201220642271 CN201220642271 CN 201220642271 CN 201220642271 U CN201220642271 U CN 201220642271U CN 202940618 U CN202940618 U CN 202940618U
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- ion battery
- power lithium
- energy
- lithium ion
- switch
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Abstract
The utility model relates to an energy-saving charging control circuit used in power lithium ion battery formation. The energy-saving charging control circuit comprises a programmable direct-current power supply, a charging switch, a discharging switch, a power lithium ion battery and a sampling resistor. The positive electrode of the power lithium ion battery is respectively connected with the charging switch, the discharging switch and the negative electrode of the power lithium ion battery is connected with the sampling resistor; the programmable direct-current power supply is respectively connected with the charging switch, the discharging switch and the sampling resistor; the programmable direct-current power supply, the charging switch, the power lithium ion battery and the sampling resistor form a charging circuit; the discharging switch, the power lithium ion battery and the sampling resistor form a discharging circuit; and the programmable direct-current power supply controls the charging voltage output to the power lithium ion battery according to the current of the sampling resistor. Compared with the prior art, the energy-saving charging control circuit used in power lithium ion battery formation has the advantages of being simple in structure, capable of achieving the effect of energy saving and the like.
Description
Technical field
The utility model relates to a kind of power lithium-ion battery formation device, especially relates to a kind of energy-saving charging control circuit that changes into for power lithium-ion battery.
Background technology
Lithium ion battery is high due to operating voltage, volume is little, quality is light, memory-less effect, pollution-free, self discharge is little, have extended cycle life, and is a kind of ideal source.In actual use, in order to obtain higher discharge voltage, generally a plurality of monomer lithium ion batteries are composed in series the lithium ion battery group and use.Before forming battery pack, because the characteristic of each monomer all is not quite similar, must combo and sorting.The process of combo and sorting is exactly the process that lithium ion battery changes into.By monomer lithium ion battery charge and discharge test being obtained the relevant information of the combo of monomer lithium ion battery, as monomer charge and discharge capacity, internal resistance, charge cutoff voltage, discharge cut-off voltage and self-discharge rate, cycle-index etc.Producer makes up in order to obtain good output characteristic the identical battery of data according to these information.
Traditional Switching Power Supply is generally with fixed voltage output, the charging current scheme of regulating power lithium-ion battery by the conducting resistance of controlling metal-oxide-semiconductor.Because traditional scheme adopts the output of power supply constant voltage, change loop resistance value method regulating loop electric current, so just making a lot of energy is that Switching Power Supply is exported the energy more than power lithium-ion battery charging actual needs, has consumed with form of heat by resistance, causes great waste.
Summary of the invention
The purpose of this utility model be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of simple in structure, can realize the energy-conservation energy-saving charging control circuit that power lithium-ion battery changes into that is used for.
The purpose of this utility model can be achieved through the following technical solutions:
a kind of energy-saving charging control circuit that changes into for power lithium-ion battery, comprise the programmable DC power supply, charge switch, discharge switch, power lithium-ion battery and sample resistance, the positive pole of described power lithium-ion battery connects respectively charge switch and discharge switch, negative pole is connected with sample resistance, described programmable DC power supply connects respectively charge switch, discharge switch and sample resistance, described programmable DC power supply, charge switch, power lithium-ion battery and sample resistance form charge circuit, described discharge switch, power lithium-ion battery and sample resistance form discharge loop.
Described programmable DC power supply is 5V programmable DC power supply.
Described sample resistance is fixed resistance value resistance.
Described charge switch and discharge switch are the MOSFET pipe.
Compared with prior art, the power lithium-ion battery charging scheme that the output voltage that the utility model adopts the output of adjusting power supply namely to change power supply is controlled, needing to have realized how much energy charge switch power supply just to supply how much energy charging, can supply exceed demand, realize energy-saving charging.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is hardware circuit diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Embodiment
as shown in Figure 1, a kind of energy-saving charging control circuit that changes into for power lithium-ion battery, comprise programmable DC power supply 5, charge switch 3, discharge switch 4, power lithium-ion battery 1 and sample resistance 2, the positive pole of described power lithium-ion battery 1 connects respectively charge switch 3 and discharge switch 4, negative pole is connected with sample resistance 2, described programmable DC power supply 5 connects respectively charge switch 3, discharge switch 4 and sample resistance 2, described programmable DC power supply 5, charge switch 3, power lithium-ion battery 1 and sample resistance 2 form charge circuit, described discharge switch 4, power lithium-ion battery 1 and sample resistance 2 form discharge loop, described programmable DC power supply 5 is exported to the charging voltage of power lithium-ion battery 1 according to the Current Control of sample resistance 2.
Described programmable DC power supply 5 is 5V programmable DC power supply.Described sample resistance 2 is fixed resistance value resistance.Described charge switch 3 and discharge switch 4 are the MOSFET pipe, play on-off action.
Be illustrated in figure 2 as the hardware circuit diagram of the energy-saving charging control circuit of the present embodiment.The charging current setting signal is the PWM pulse-width signal, and the duty ratio of pulsewidth (the high level part in periodic signal) is namely reacted the size that the user sets electric current.The specific works principle is as follows:
VREF is 5V; BSSg4 is the P-channel field-effect transistor (PEFT) pipe, conducting when control signal is low-voltage; 2N7002 is N channel field-effect pipe, and control signal is the high voltage conducting; Pulsewidth is narrower, and the BSS84 ON time is longer, and the voltage left of 3 pin of U6 is just higher so is that current settings is higher; Pulsewidth is wider, and the 2N7002 ON time is longer, and the voltage left of 3 pin of U6 is just lower so is that current settings is lower.
R76 is high-accuracy current divider and sample resistance, and the voltage signal on it is 2 pin that voltage signal that current sample gets is delivered to U6.The current settings signal just carries out differential amplification with the current signal that samples by U6 like this, the result that draws be used for the by-pass cock power supply output so that control the size of charging current, reach the purpose that constant current is controlled.
Traditional mode is to reach the purpose of charging constant current by the charge switch 3 in adjusting Fig. 1, can cause like this power dissipation ratio of charge switch larger, and such power consumption loses with the form of heating, and is quite not energy-conservation.The power lithium-ion battery charging scheme that the output voltage that this method adopts the output of adjusting power supply namely to change power supply is controlled, needing can realize how much energy charge switch power supply just to supply the how much energy charging, can supply exceed demand, reaching the charging constant current by the mode of regulating the programmable DC power supply 5 in Fig. 1 controls, charge switch 3 is just controlled use as switch, only has conduction loss, and is very little, substantially can ignore, reach thus energy-conservation purpose.
Claims (4)
1. one kind is used for the energy-saving charging control circuit that power lithium-ion battery changes into, it is characterized in that, comprise the programmable DC power supply, charge switch, discharge switch, power lithium-ion battery and sample resistance, the positive pole of described power lithium-ion battery connects respectively charge switch and discharge switch, negative pole is connected with sample resistance, described programmable DC power supply connects respectively charge switch, discharge switch and sample resistance, described programmable DC power supply, charge switch, power lithium-ion battery and sample resistance form charge circuit, described discharge switch, power lithium-ion battery and sample resistance form discharge loop.
2. a kind of energy-saving charging control circuit that changes into for power lithium-ion battery according to claim 1, is characterized in that, described programmable DC power supply is 5V programmable DC power supply.
3. a kind of energy-saving charging control circuit that changes into for power lithium-ion battery according to claim 1, is characterized in that, described sample resistance is fixed resistance value resistance.
4. a kind of energy-saving charging control circuit that changes into for power lithium-ion battery according to claim 1, is characterized in that, described charge switch and discharge switch are the MOSFET pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220642271 CN202940618U (en) | 2012-11-28 | 2012-11-28 | Energy-saving charging control circuit used in power lithium ion battery formation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220642271 CN202940618U (en) | 2012-11-28 | 2012-11-28 | Energy-saving charging control circuit used in power lithium ion battery formation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202940618U true CN202940618U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220642271 Expired - Lifetime CN202940618U (en) | 2012-11-28 | 2012-11-28 | Energy-saving charging control circuit used in power lithium ion battery formation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202940618U (en) |
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2012
- 2012-11-28 CN CN 201220642271 patent/CN202940618U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |