CN204190424U - A kind of charge-discharge protection circuit and charge-discharge system - Google Patents
A kind of charge-discharge protection circuit and charge-discharge system Download PDFInfo
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- CN204190424U CN204190424U CN201420553050.8U CN201420553050U CN204190424U CN 204190424 U CN204190424 U CN 204190424U CN 201420553050 U CN201420553050 U CN 201420553050U CN 204190424 U CN204190424 U CN 204190424U
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Abstract
The utility model embodiment provides a kind of charge-discharge protection circuit and charge-discharge system, and described protective circuit comprises charge management module, driver module and charge and discharge protecting module; Described driver module connects described charge management module and described charge and discharge protecting module respectively; Described driver module is connected rechargeable battery with described charge and discharge protecting module; Described charge management module, external charge power supply, described charge management module is used for the output voltage of charge power supply to be adjusted to default charging voltage, and the output current of charge power supply is adjusted to default charging current; Described charge and discharge protecting module, for detecting the voltage of described charging voltage and described rechargeable battery, and driver module is turned on or off according to the voltage control detected; Described driver module, has conducting state or off-state, and described driver module is in conducting state, then described rechargeable battery can carry out discharge and recharge; Described driver module is in off-state, then described rechargeable battery stops discharge and recharge.
Description
Technical field
The utility model relates to technical field of electricity, particularly a kind of charge-discharge protection circuit and charge-discharge system.
Background technology
Current, lithium battery has been applied in the middle of electronic product widely.Due to the advantage that lithium battery has long service life, fail safe is high, charge/discharge rates is fast, memoryless effect, volume are little and capacity is large, economic environmental protection etc. is many, so be storage battery ideal in electronic product at this stage.
But on current market, lithium battery specification is varied, relevant parameter, and---especially standard charge voltage---is different.Corresponding charger is of a great variety equally.The charger that the cell arrangement that all can dispatch from the factory for it of general manufacturer is special.On stricti jurise, due to the difference of standard charge voltage, the charger of different battery different electronic product is in other words uncurrent often.
Meanwhile, for guaranteeing useful life and the use safety of battery, design often arranges charge protection loop in the charger of battery, to avoid overcharging of battery; Discharge prevention loop is set at battery itself, to avoid over-discharge can.That is, charge protection loop and discharge prevention loop are provided separately, and only have and utilize special charger to charge to battery, could play the effect in charge protection loop and discharge prevention loop more fully.This further have impact on the versatility of charger.
Also there is the custom that a part of user has mixed charger; but mixed charger can make the standard charge voltage of charger output voltage and battery not be inconsistent; and charge protection loop and discharge prevention loop cannot fully play a role, probably have influence on useful life and the use safety of battery.
Therefore, those skilled in the art need to provide a kind of charge-discharge protection circuit, can receive the power supply that various charger exports, and reduce terminal equipment to the dependence of different model charger, and improve the fail safe of charge and discharge process in terminal equipment further.
Utility model content
In view of this; the purpose of this utility model is to provide a kind of charge-discharge protection circuit and charge-discharge system; the power supply that various charger exports can be received, reduce terminal equipment to the dependence of different model charger, and take into account and incorporate charge protection and discharge prevention.
For achieving the above object, the utility model has following technical scheme:
The utility model embodiment provides a kind of charge-discharge protection circuit, and described protective circuit comprises: charge management module, driver module and charge and discharge protecting module;
The first end of described driver module connects the output of described charge management module; Second end of described driver module connects described rechargeable battery; The control end of described driver module connects described charge and discharge protecting module;
The input of described charge management module connects charge power supply;
Described charge management module, exports for the output voltage of charge power supply is adjusted to default charging voltage, and the output current of described charge power supply is adjusted to default charging current exports;
Described charge and discharge protecting module, for detecting the described charging voltage and the voltage of described rechargeable battery that described charge management module exports, and driver module is turned on or off according to the voltage control of the described charging voltage detected and rechargeable battery;
Described driver module, has conducting state or off-state, and described driver module is in conducting state, then described rechargeable battery carries out discharge and recharge; Described driver module is in off-state, then described rechargeable battery stops discharge and recharge.
Preferably, described charge and discharge protecting module controls described driver module and is turned on or off, and is specially:
Described charge and discharge protecting module detects described charging voltage when being greater than the voltage of described rechargeable battery, and for controlling described driver module conducting, described charge management module is that described rechargeable battery charges;
When the voltage that described charge and discharge protecting module detects described rechargeable battery is higher than the overcharged voltage threshold value preset, disconnect for controlling described driver module, described charge management module stops charging for described rechargeable battery;
When the voltage that described charge and discharge protecting module detects described rechargeable battery is lower than the overdischarge pressure threshold value preset, disconnect for controlling described driver module, described rechargeable battery stops electric discharge.
Preferably, described driver module comprises the first gate-controlled switch and the second gate-controlled switch;
The first end of described first gate-controlled switch is as the first end of described driver module, and the second end of described first gate-controlled switch connects the first end of described second gate-controlled switch;
Second end of described second gate-controlled switch is as the second end of described driver module;
The control end of described first gate-controlled switch is all connected described charge and discharge protecting module with the control end of the second gate-controlled switch.
Preferably, described charge power supply is charger, described charge management module, for connecting the charger of different output voltage, and described output voltage is adjusted to default charging voltage.
Preferably, also Schottky diode is comprised;
The output of described charge management module connects the negative electrode of described Schottky diode, the plus earth of described Schottky diode.
Preferably, the first filter inductance, the first filter capacitor, the second filter capacitor, the first resistance and the first current-limiting resistance is also comprised;
The output of described charge management module is connected the input of described driver module with the first current-limiting resistance by described first filter inductance of series connection;
The input of described driver module is by described first filter capacitor ground connection;
The output of described charge management module passes through described first resistance and the second filter capacitor ground connection of series connection.
Preferably, also comprise: the first sampling resistor and the second sampling resistor;
Described first sampling resistor is set between described driver module and described charge management module;
Described charge and discharge protecting module detects described charging voltage by described first sampling resistor;
Described second sampling resistor is set between described charge and discharge protecting module and described rechargeable battery;
Described charge and discharge protecting module detects the voltage of described rechargeable battery by this second sampling resistor.
Preferably, described charge and discharge protecting module detects that described charge management module and rechargeable battery disconnect, then controls described driver module conducting after controlling the disconnection of described driver module, starts electric discharge to make described rechargeable battery.
The utility model embodiment also provides a kind of charge-discharge system, and this system comprises: charge power supply and terminal equipment:
Have rechargeable battery and charge-discharge protection circuit in this terminal equipment, wherein, described charge-discharge protection circuit is described charge-discharge protection circuit.
Preferably, described charge power supply is charger, and described terminal equipment is corpuscular counter, has rechargeable battery and charge-discharge protection circuit in this corpuscular counter, and this corpuscular counter is charged to this rechargeable battery by this charger.
As seen through the above technical solutions, there is following beneficial effect in the utility model:
Charging current in the certain voltage interval exported by various common charger by charge management module is adjusted to the direct current of normal voltage, thus common batteries only need be combined with described charge-discharge protection circuit, namely the charger of available different model charges; And compatible charge protection and discharge prevention function, further improve the adaptability of battery to charger, make the charging more Portable safety of battery in charge and discharge protecting module; And be that charge protector is set in charger in prior art; in terminal equipment, discharge protection circuit is set; such terminal equipment only can be applicable to special charger; and in the scheme that the utility model provides; charge-discharge protection circuit is arranged in terminal equipment; charge management module is included in terminal equipment; charge and discharge protecting module; therefore; terminal equipment is provided with the function regulating charging voltage charging current and charge and discharge protecting; go for various charger, provide versatility.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of charge-discharge protection circuit embodiment one described in the utility model embodiment;
Fig. 2 is the schematic diagram of charge-discharge protection circuit embodiment two described in the utility model embodiment;
Fig. 3 is the structural representation of charge-discharge system embodiment one described in the utility model embodiment.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The voltage of the charging current that current common charger exports is generally within the interval of 9V ~ 17V, and the standard charge voltage of battery is only that unique value or scope are very little, so common batteries can not adapt to multiple different charger.
The utility model provides a kind of charge-discharge protection circuit, and described charge-discharge protection circuit can be arranged in terminal equipment, uses together with common battery, and battery connects present stage various types of common charger by this charge-discharge protection circuit.By described charge-discharge protection circuit, the direct current of the certain voltage scope that common charger can be exported is converted to the direct current meeting this battery standard charging voltage; If so battery combines described charge-discharge protection circuit, just can connect various types of charger and carry out safe charging.
Charge-discharge protection circuit embodiment one:
See Fig. 1, this figure is the schematic diagram of the charge-discharge protection circuit embodiment one that the utility model provides.
In the present embodiment, described charge-discharge protection circuit comprises: charge management module 101, driver module 102 and charge and discharge protecting module 103;
The first end of described driver module 102 connects the output of described charge management module 101; Second end of described driver module 102 connects described rechargeable battery; The control end of described driver module 102 connects described charge and discharge protecting module 103;
The input of described charge management module 101 connects charging current (namely for being provided by charge power supply, not shown);
Described charge management module 101, exports for the output voltage of charge power supply is adjusted to default charging voltage, and the output current of described charge power supply is adjusted to default charging current exports;
Described charge and discharge protecting module 103, for detecting the described charging voltage and the voltage of described rechargeable battery that described charge management module 101 exports, and driver module 102 is turned on or off according to the voltage control of the described charging voltage detected and rechargeable battery;
Described driver module 102, has conducting state or off-state, and described driver module 102 is in conducting state, then described rechargeable battery carries out discharge and recharge; Described driver module 102 is in off-state, then described rechargeable battery stops discharge and recharge.
Described charge power supply is charger (described charger is generally connected to civil power), and described charge management module 101 can connect the charger of various different rated output voltage.
Described charge management module 101 can connect the charger of different output voltage, and described output voltage is adjusted to default charging voltage.Thus; described charge-discharge protection circuit can realize the direct current electric energy in certain voltage interval being adjusted to normal voltage; achieve mating of common batteries and various model charger; common batteries only in conjunction with described charge-discharge protection circuit, namely can need adapt to most charger widely.
In the middle of described charge-discharge protection circuit, charge and discharge protecting module and driver module is utilized to achieve the combination of charge protector and discharge protection circuit.
Described charge and discharge protecting module can be monitored the output voltage of charge management module or the voltage of rechargeable battery according to control strategy in charging process, is turned on or off to control described driver module.
Charging current in the certain voltage interval exported by various common charger by charge management module is adjusted to the direct current of normal voltage, thus common batteries only need be combined with described charge-discharge protection circuit, namely the charger of available different model charges; And compatible charge protection and discharge prevention function, further improve the adaptability of battery to charger, make the charging more Portable safety of battery in charge and discharge protecting module; And be that charge protector is set in charger in prior art; in terminal equipment, discharge protection circuit is set; such terminal equipment only can be applicable to special charger; and in the scheme that the utility model provides; charge-discharge protection circuit is arranged in terminal equipment; charge management module is included in terminal equipment; charge and discharge protecting module; therefore; terminal equipment is provided with the function regulating charging voltage charging current and charge and discharge protecting; go for various charger, provide versatility.
Charge-discharge protection circuit embodiment two:
See Fig. 2, this figure is the schematic diagram of the charge-discharge protection circuit embodiment two that the utility model provides.
In the present embodiment, described charge and discharge protecting module controls described driver module and is turned on or off, and is specially:
Described charge and discharge protecting module 103 detects described charging voltage when being greater than the voltage of described rechargeable battery, and for controlling the conducting of described driver module 102, described charge management module 101 is charged for described rechargeable battery 104;
When the voltage that described charge and discharge protecting module 103 detects described rechargeable battery 104 is higher than the overcharged voltage threshold value preset, disconnect for controlling described driver module 102, described charge management module 101 stops charging for described rechargeable battery 104;
When the voltage that described charge and discharge protecting module 103 detects described rechargeable battery is lower than the overdischarge pressure threshold value preset, disconnect for controlling described driver module 102, described rechargeable battery 104 stops electric discharge.
In the present embodiment, described driver module 102 comprises the first controllable switch S 1 and the second controllable switch S 2;
The first end of described first controllable switch S 1 is as the first end of described driver module 102, and the second end of described first controllable switch S 1 connects the first end of described second controllable switch S 2;
Second end of described second controllable switch S 2 is as the second end of described driver module 102;
The control end of described first controllable switch S 1 is all connected described charge and discharge protecting module 103 with the control end of the second controllable switch S 2.
Be understandable that, the on off state of charge and discharge protecting module 103 control S1 and S2, specifically can drive the control end of S1 and S2 by exporting control signal, being turned on or off to make S1 and S2.
It should be noted that, due to S1 and S2 series connection, therefore, when charge management module 101 is charged for rechargeable battery 104, S1 and S2 is all closed.Be understandable that, when rechargeable battery 104 discharges, S1 and S2 also needs all to close.Namely or be in charged state the flow direction due to electric current is unidirectional, and during charging, electric current flows into rechargeable battery 104, and during electric discharge, outflow of bus current rechargeable battery 104, therefore, rechargeable battery 104 only can be in a state at synchronization, or is in discharge condition.
Be described above, during charge or discharge, S1 and S2 all needs to close.But not charge, or when not discharging, because two switch S 1 and S2 are the relations of series connection, only need to disconnect one of them and just can realize electric current and do not circulate.
Introduce how control S1 realizes charging control below, how control S2 realizes control of discharge.
First the control procedure of charge protection is introduced.
Described charge and discharge protecting module 103 detects described charging voltage when being greater than the voltage of described rechargeable battery 104, and for controlling the S1 conducting in described driver module, described charge management module 101 is charged for described rechargeable battery 104; It should be noted that, now S2 is conducting, and S2 is all conductings except excessively putting except state at rechargeable battery 104.
When the voltage that described charge and discharge protecting module 103 detects described rechargeable battery 104 is higher than the overcharged voltage threshold value preset, disconnect for the S1 controlled in described driver module, described charge management module 101 stops charging for described rechargeable battery 104; Now, because S1 and S2 is series relationship, therefore, as long as S1 disconnects, then charge management module 101 has just been disconnected with the path of rechargeable battery 104, even if now closed also impact of S2 stops charging.
In addition, discharge path is introduced at this.Because rechargeable battery 104 is filled with electricity; S1 is disconnected; now; charge and discharge protecting module 103 detects that charge management module 101 does not have voltage have input; then illustrate that charge management module 101 removes, now control S1 conducting (closing) again, because S1 and S2 is all closed; now rechargeable battery 104 can discharge, and discharge path is logical.
Introduce the control procedure of discharge prevention below.
When the voltage that described charge and discharge protecting module 103 detects described rechargeable battery 104 is lower than the overdischarge pressure threshold value preset, disconnect for the S2 controlled in described driver module, now, discharge path is cut off, and described rechargeable battery 104 stops electric discharge.
It should be noted that, need charging when charge and discharge protecting module 103 detects, and charge management module 101 export the voltage of voltage higher than rechargeable battery 104 time, will control S1 and S2 all closed.
The control logic of S1 and S2 is realized by charge and discharge protecting module 103.During charging and discharging, S1 and S2 is all closed, and when overcharging, S1 disconnects, and when excessively putting, S2 disconnects.
Therefore, the control of what S1 was corresponding realize charge protection, S2 correspondence realizes the control of discharge prevention.
Described charge power supply is any rated voltage (namely described charge power supply is the charger with any rated voltage within the scope of 9-17V) within the scope of 9-17V, described charge power supply is connected to described charge management module 101 by filter capacitor 101, described charge management module 101, for connecting the charger of different output voltage, and described output voltage is adjusted to default charging voltage.Such as; described charge management module 101 is the charge protection chip of TP5100 model; controlling resistance R1 is connected to the edited charging voltage pin of charge protection chip, and arranging charge protection chip respectively by the resistance of regulable control resistance R1 is that two joint rechargeable battery 8.4V or single-unit rechargeable battery 4.7V charge.Controlling resistance R2 is connected to the trickle precharge electric current pin of charge protection chip, generally charge protection chip is set to the trickle precharge electric current of constant current 10% by the resistance of regulable control resistance R2.Namely charging current parameter is controlled by controlling resistance R1 and controlling resistance R2.Set this parameter according to electronic product battery capacity, can set the charging rate of battery, excessive electric current easily causes cell damage.Too small electric current causes charging interval long heating.This circuit is increased to electronic product punching, any power supply, its charging interval, charging current are all the same, so charge power supply can worse property very strong.
In addition, Schottky diode 105 is also comprised;
The output of described charge management module 101 connects the negative electrode of described Schottky diode 105, the plus earth of described Schottky diode 105.
The effect of Schottky diode 105 is the harm that the characteristic utilizing diode reverse to end is brought to prevent positive pole and negative pole reversal connection.
This charge-discharge protection circuit, also comprises the first filter inductance 106, first filter capacitor 1011, second filter capacitor 107, first resistance 108 and the first current-limiting resistance 109;
The output of described charge management module 101 is connected the input of described driver module 102 with the first current-limiting resistance 109 by described first filter inductance 106 of series connection;
Wherein, the first filter inductance 106 realizes the stability of charging current, and the first current-limiting resistance 109 realizes current limliting, makes charging current very greatly, can not occur spike.
The input of described driver module 102 is by described first filter capacitor 1011 ground connection;
First filter capacitor 1011 realizes the effect of filtering.
Described first resistance 108 and second filter capacitor 107 ground connection of output by connecting of described charge management module 101.
First resistance 108 and the second filter capacitor 107 realize the effect of filtering.
The charge-discharge protection circuit that the present embodiment provides, also comprises: the first sampling resistor 1013 and the second sampling resistor;
Described first sampling resistor 1013 is set between described driver module 102 and described charge and discharge protecting module 103;
The voltage swing that charge management module 101 exports can be known by the voltage on the first sampling resistor 1013.
Described charge and discharge protecting module 103 detects described charging voltage by described first sampling resistor 1013;
Between described charge and discharge protecting module 103 and described rechargeable battery 104, described second sampling resistor is set;
It should be noted that, the second sampling resistor comprises two in the present embodiment, is resistance 1018 and resistance 1019 respectively.Because rechargeable battery 1014 comprises two batteries, therefore, 1018 and 1019 are utilized to measure respectively the voltage of this two batteries respectively.
Described charge and discharge protecting module 103 detects the voltage of described rechargeable battery by this second sampling resistor.
It should be noted that, charge and discharge protecting module 103 drives S1 by resistance 1014, drives S2 by resistance 1015; general drive singal is current signal; in order to the spike limiting drive current moment causes damage to switch, therefore, resistance 1014 and 1015 is used to realize protection.
Described charge management module comprises one or more voltage-regulation resistance.Charge management module, for the parameter of battery, pre-sets a standard charge voltage.Charge management module is after the charging current connecting 9V ~ 17V interval that common charger provides, and what charge management module was unified is standard charge voltage by the voltage-regulation of this voltage range charging current, then exports with galvanic form.
Utilize described regulating resistance, described charge management module can also control the intensity of the direct current exported, and regulates charging rate, prevents excessive charging current from causing cell damage, or too small charging current causes the problem such as charging interval and long hair heat.And at the beginning of charge initiation, export a less pre-charge current by regulating resistance, follow-uply progressively electric current is increased to conventional intensity again, avoid high electric current for the impact of battery.
In addition, in the middle of described charge management module, preferably filter capacitor can also be set up, for carrying out filtering to charging current.
The filter capacitor C1 be connected between the input of charge management module 101 and ground is in order to level and smooth charge power supply, and then protection charge management module 101.
It should be noted that, S1 and S2 is gate-controlled switch, such as, can be realized by controlled tr tubes such as BJT, MOSFET, IGBT.
Based on structure and the control strategy of above-mentioned charge-discharge protection circuit, make described charge-discharge protection circuit be provided with the function of charge protection and discharge prevention simultaneously.Described charge-discharge protection circuit, in charge protection process, controls described driver module and disconnects, charge to block described direct current to rechargeable battery; Described charge-discharge protection circuit, in discharge prevention process, controls described driver module and disconnects, to block described discharging rechargeable battery.
In charging process charge management module be connected charging current, and by charging current joint for reaching the direct current of default standard charge voltage.After charge and discharge protecting module detects that DC voltage that charge management module exports is up to standard, namely control driver module conducting, the direct current guiding charge management module to export flows into battery and charges.
And at the beginning of charge initiation, a less pre-charge current can be exported by regulating resistance, follow-uply progressively electric current is increased to conventional intensity again, avoid high electric current for the impact of battery
When the voltage of rechargeable battery is higher than the overcharged voltage threshold value preset, illustrates that charging completes, continuing the phenomenon that generation to be overcharged of charging; disconnect so control driver module; charge to rechargeable battery to block described direct current, charging is stopped, realizing charge protection.
After battery completes charging, and voltage-regulation and charging current disconnect, then enter the discharge condition of battery.Now charge and discharge protecting module controls driver module conducting, starts electric discharge to make described rechargeable battery.
Namely the normal use procedure of battery is the process of an electric discharge.In the middle of use procedure, the conducting always of described driver module, and described charge and discharge protecting module is in this course without the need to playing a role.When discharge process continues the regular hour, the voltage of rechargeable battery is lower than the overdischarge pressure threshold value preset, and illustrate that the electricity of battery is very low, continuing electric discharge will occur the phenomenon of over-discharge can.So in this case, charge and discharge protecting module starts to get involved, and controls driver module disconnection, to make described rechargeable battery stop electric discharge, realizes discharge prevention.
In the present embodiment, be provided with the first sampling resistor between described driver module and described charge management module, described charge and discharge protecting module detects described charging voltage by this first sampling resistor; Be provided with the second sampling resistor between described charge and discharge protecting module and described rechargeable battery, described charge and discharge protecting module detects the voltage of described rechargeable battery by this second sampling resistor.
Namely described charge-discharge protection circuit switches in charging, charge protection and discharge prevention three kinds of situations is that operating state by controlling described driver module realizes.
For the filtering device more than the present embodiment enumerated, different concrete combining forms can be had in the art, restriction is not made to its concrete form in the present embodiment.But the present embodiment is passed the imperial examinations at the provincial level and is illustrated a kind of structure of filter assemblies, charge-discharge protection circuit shown in Figure 2.
Also it should be noted that, install for some the electronic product that two even multiple batteries can run, two or more described batteries can share a charge-discharge protection circuit simultaneously.Then described driver module and charge and discharge protecting module multily can be connected respectively to each battery.Charge and discharge protecting module gathers the voltage of each rechargeable battery respectively, and controls driver module to the connection conducting of respective battery or disconnection.Realize the control of multiple battery independent parallel, to meet simultaneously to the demand that multiple battery charges, the charging effect of each battery is independent of each other.
As seen through the above technical solutions, the beneficial effect that the present embodiment exists is: the charging current in the certain voltage interval export various common charger is adjusted to the direct current of normal voltage, thus common batteries only need be combined with described charge-discharge protection circuit, namely the charger of available different model charges; And compatible charge protector and discharge protection circuit, further improve the adaptability of battery to charger, make the charging more Portable safety of battery in described charge-discharge protection circuit; By arranging filter assemblies in charge-discharge protection circuit, improve stability and the fail safe of charge-discharge protection circuit; By multiple battery sharing charge-discharge protection circuit, realize the independent parallel charging of multiple battery, independently carry out charge protection or discharge prevention.
Based on a kind of charge-discharge protection circuit that above embodiment provides, the utility model embodiment still provides a kind of charge-discharge system, describes in detail below in conjunction with accompanying drawing.
System embodiment one:
See Fig. 3, this figure is charge-discharge system embodiment one schematic diagram that the utility model provides.
The charge-discharge system that the present embodiment provides comprises: charge power supply 301 and terminal equipment 302;
Described terminal equipment 302 has rechargeable battery and the charge-discharge protection circuit described in above embodiment.
Wherein, described charge-discharge protection circuit realizes according to the charge-discharge protection circuit shown in previous embodiment.
Described protective circuit comprises: charge management module, driver module and charge and discharge protecting module;
The first end of described driver module connects the output of described charge management module; Second end of described driver module connects described rechargeable battery; The control end of described driver module connects described charge and discharge protecting module;
The input of described charge management module connects charge power supply;
Described charge management module, exports for the output voltage of charge power supply is adjusted to default charging voltage, and the output current of described charge power supply is adjusted to default charging current exports;
Described charge and discharge protecting module, for detecting the described charging voltage and the voltage of described rechargeable battery that described charge management module exports, and driver module is turned on or off according to the voltage control of the described charging voltage detected and rechargeable battery;
Described driver module, has conducting state or off-state, and described driver module is in conducting state, then described rechargeable battery carries out discharge and recharge; Described driver module is in off-state, then described rechargeable battery stops discharge and recharge.
Described charge power supply 301 can be charger; described terminal equipment 302 can be corpuscular counter; have rechargeable battery and charge-discharge protection circuit in this corpuscular counter 302, this corpuscular counter 302 is charged to the rechargeable battery in this corpuscular counter 302 by this charger.
Because this corpuscular counter inside is integrated with the charge management module with power source conversion function; and there is the charge and discharge protecting module of charge protection and discharge prevention function; therefore, this corpuscular counter can be applied to multiple charger, has better versatility.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a charge-discharge protection circuit, is characterized in that, described protective circuit comprises: charge management module, driver module and charge and discharge protecting module;
The first end of described driver module connects the output of described charge management module; Second end of described driver module connects described rechargeable battery; The control end of described driver module connects described charge and discharge protecting module;
The input of described charge management module connects charge power supply;
Described charge management module, exports for the output voltage of charge power supply is adjusted to default charging voltage, and the output current of described charge power supply is adjusted to default charging current exports;
Described charge and discharge protecting module, for detecting the described charging voltage and the voltage of described rechargeable battery that described charge management module exports, and driver module is turned on or off according to the voltage control of the described charging voltage detected and rechargeable battery;
Described driver module, has conducting state or off-state, and described driver module is in conducting state, then described rechargeable battery carries out discharge and recharge; Described driver module is in off-state, then described rechargeable battery stops discharge and recharge.
2. charge-discharge protection circuit according to claim 1, it is characterized in that, described charge and discharge protecting module controls described driver module and is turned on or off, and is specially:
Described charge and discharge protecting module detects described charging voltage when being greater than the voltage of described rechargeable battery, and for controlling described driver module conducting, described charge management module is that described rechargeable battery charges;
When the voltage that described charge and discharge protecting module detects described rechargeable battery is higher than the overcharged voltage threshold value preset, disconnect for controlling described driver module, described charge management module stops charging for described rechargeable battery;
When the voltage that described charge and discharge protecting module detects described rechargeable battery is lower than the overdischarge pressure threshold value preset, disconnect for controlling described driver module, described rechargeable battery stops electric discharge.
3. charge-discharge protection circuit according to claim 2, it is characterized in that, described driver module comprises the first gate-controlled switch and the second gate-controlled switch;
The first end of described first gate-controlled switch is as the first end of described driver module, and the second end of described first gate-controlled switch connects the first end of described second gate-controlled switch;
Second end of described second gate-controlled switch is as the second end of described driver module;
The control end of described first gate-controlled switch is all connected described charge and discharge protecting module with the control end of the second gate-controlled switch.
4. charge-discharge protection circuit according to claim 1, it is characterized in that, described charge power supply is charger, described charge management module, for connecting the charger of different output voltage, and described output voltage is adjusted to default charging voltage.
5. charge-discharge protection circuit according to claim 1, is characterized in that, also comprise Schottky diode;
The output of described charge management module connects the negative electrode of described Schottky diode, the plus earth of described Schottky diode.
6. charge-discharge protection circuit according to any one of claim 1-5, is characterized in that, also comprises the first filter inductance, the first filter capacitor, the second filter capacitor, the first resistance and the first current-limiting resistance;
The output of described charge management module is connected the input of described driver module with the first current-limiting resistance by described first filter inductance of series connection;
The input of described driver module is by described first filter capacitor ground connection;
The output of described charge management module passes through described first resistance and the second filter capacitor ground connection of series connection.
7. charge-discharge protection circuit according to claim 1, is characterized in that, also comprise: the first sampling resistor and the second sampling resistor;
Described first sampling resistor is set between described driver module and described charge management module;
Described charge and discharge protecting module detects described charging voltage by described first sampling resistor;
Described second sampling resistor is set between described charge and discharge protecting module and described rechargeable battery;
Described charge and discharge protecting module detects the voltage of described rechargeable battery by this second sampling resistor.
8. charge-discharge protection circuit according to claim 3; it is characterized in that, described charge and discharge protecting module detects that described charge management module and rechargeable battery disconnect after controlling the disconnection of described driver module; then control described driver module conducting, start electric discharge to make described rechargeable battery.
9. a charge-discharge system, is characterized in that, this system comprises: charge power supply and terminal equipment:
Have rechargeable battery and charge-discharge protection circuit in this terminal equipment, wherein, described charge-discharge protection circuit is the charge-discharge protection circuit described in claim 1 ~ 8 any one.
10. charge-discharge system according to claim 9; it is characterized in that, described charge power supply is charger, and described terminal equipment is corpuscular counter; have rechargeable battery and charge-discharge protection circuit in this corpuscular counter, this corpuscular counter is charged to this rechargeable battery by this charger.
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| CN201420553050.8U CN204190424U (en) | 2014-09-24 | 2014-09-24 | A kind of charge-discharge protection circuit and charge-discharge system |
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| CN201420553050.8U CN204190424U (en) | 2014-09-24 | 2014-09-24 | A kind of charge-discharge protection circuit and charge-discharge system |
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| CN204190424U true CN204190424U (en) | 2015-03-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104218648A (en) * | 2014-09-24 | 2014-12-17 | 苏州贝昂科技有限公司 | Charging and discharging protection circuit and charging and discharging system |
| CN106376104A (en) * | 2016-09-07 | 2017-02-01 | 合肥工业大学智能制造技术研究院 | Battery self-discharge heating circuit |
| CN107394856A (en) * | 2017-08-31 | 2017-11-24 | 上海汇瑞半导体科技有限公司 | A kind of parallel cells charging circuit and its charging method |
| CN107508346A (en) * | 2017-08-28 | 2017-12-22 | 惠州Tcl移动通信有限公司 | Mobile terminal and charge control method and storage medium |
| CN108631378A (en) * | 2017-03-23 | 2018-10-09 | 义乌正隆新能源科技有限公司 | charger for lithium battery |
| CN110970963A (en) * | 2018-12-07 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Charging and discharging circuit |
| CN111835048A (en) * | 2019-04-22 | 2020-10-27 | 添可智能科技有限公司 | Charging and discharging switching circuit and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218648A (en) * | 2014-09-24 | 2014-12-17 | 苏州贝昂科技有限公司 | Charging and discharging protection circuit and charging and discharging system |
| CN106376104A (en) * | 2016-09-07 | 2017-02-01 | 合肥工业大学智能制造技术研究院 | Battery self-discharge heating circuit |
| CN106376104B (en) * | 2016-09-07 | 2020-12-08 | 合肥工业大学智能制造技术研究院 | Battery self-discharge heating circuit |
| CN108631378A (en) * | 2017-03-23 | 2018-10-09 | 义乌正隆新能源科技有限公司 | charger for lithium battery |
| CN107508346A (en) * | 2017-08-28 | 2017-12-22 | 惠州Tcl移动通信有限公司 | Mobile terminal and charge control method and storage medium |
| CN107394856A (en) * | 2017-08-31 | 2017-11-24 | 上海汇瑞半导体科技有限公司 | A kind of parallel cells charging circuit and its charging method |
| CN107394856B (en) * | 2017-08-31 | 2024-01-30 | 旋智电子科技（上海）有限公司 | Parallel battery charging circuit and charging method thereof |
| CN110970963A (en) * | 2018-12-07 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Charging and discharging circuit |
| CN110970963B (en) * | 2018-12-07 | 2021-02-19 | 宁德时代新能源科技股份有限公司 | Charging and discharging circuit |
| US11418046B2 (en) | 2018-12-07 | 2022-08-16 | Contemporarv Amperex Technologv Co., Limited | Charge and discharge circuit |
| CN111835048A (en) * | 2019-04-22 | 2020-10-27 | 添可智能科技有限公司 | Charging and discharging switching circuit and electronic equipment |
| CN111835048B (en) * | 2019-04-22 | 2022-07-15 | 添可智能科技有限公司 | Charging and discharging switching circuit and electronic equipment |
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