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WO2016192248A1 - Circuit de charge et chargeur - Google Patents

Circuit de charge et chargeur Download PDF

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Publication number
WO2016192248A1
WO2016192248A1 PCT/CN2015/090264 CN2015090264W WO2016192248A1 WO 2016192248 A1 WO2016192248 A1 WO 2016192248A1 CN 2015090264 W CN2015090264 W CN 2015090264W WO 2016192248 A1 WO2016192248 A1 WO 2016192248A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic switch
resistor
charging circuit
alternating current
transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/090264
Other languages
English (en)
Chinese (zh)
Inventor
王坚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen TCL Digital Technology Co Ltd
Original Assignee
Shenzhen TCL Digital Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen TCL Digital Technology Co Ltd filed Critical Shenzhen TCL Digital Technology Co Ltd
Publication of WO2016192248A1 publication Critical patent/WO2016192248A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present invention relates to the field of battery charging technologies, and in particular, to a charging circuit and a charger.
  • Secondary batteries are commonly referred to as rechargeable batteries or batteries.
  • FIG. 1 shows a conventional charging circuit.
  • the AC mains is reduced to a suitable AC voltage by the transformer TR01.
  • the AC voltage is rectified by the diode D01 to become a pulsating DC voltage, and then the current limit of the resistor R01 is the battery BAT01.
  • Charging the charging circuit has a simple structure, is easy to implement, and has low cost.
  • a general charger is used, but the charging circuit generates a polarization voltage during the charging process, and the polarization voltage is reduced on the one hand.
  • Efficiency on the other hand, interferes with the monitoring circuit that charges the battery, causing the battery to end prematurely without being fully charged, which is especially noticeable during high current charging.
  • the charging circuit shown in FIG. 2 is an improvement of the charging circuit shown in FIG. 1.
  • a resistor R03 is connected in parallel across the diode D02, and the working principle is that when the induced voltage of the secondary winding of the transformer TR03 is in the positive half cycle, the voltage is The battery BAT02 is charged by the diode D02 and the resistor R02.
  • the voltage forms a discharge loop through the battery BAT02 and the resistor R03, and the size of the selection resistor R03 can control the discharge current.
  • the discharge current is 5% to 20% of the charging current, which can reduce the generation of the polarization voltage and achieve the purpose of depolarization.
  • a primary object of the present invention is to provide a charging circuit for improving the charging efficiency of a charging circuit while avoiding battery discharge when the charging circuit is not connected to the alternating current.
  • a charging circuit provided by the present invention includes a first alternating current input terminal, a second alternating current input terminal, a transformer, a diode, a first resistor, a second resistor, a battery, a first electronic switch, and a second electronic switch;
  • a primary coil of the transformer is connected to the first alternating current input end and a second alternating current input end for accessing alternating current, and a secondary coil end of the transformer is respectively connected with the first end of the first electronic switch and the battery a negative pole is connected, the other end of the secondary coil of the transformer is connected to the second end of the first electronic switch, and is connected to the positive pole of the battery via the diode, the first resistor; the second electronic switch One end is connected to the third end of the first electronic switch, the second end of the second electronic switch is connected to the positive pole of the battery, and the third end of the second electronic switch is connected via the second resistor
  • the negative electrode of the battery is connected; when the alternating current is connected and the induced voltage of the secondary coil of the transformer is in a negative half cycle, the induced voltage drives the first electronic switch to be turned on to drive the second electronic switch to be turned on.
  • the battery is discharged through the second electronic switch and the second resistor; when no alternating current is connected, the first electronic switch and the second
  • the charging circuit further includes a third resistor, one end of the third resistor is connected to the second end of the secondary coil of the transformer, and the other end of the third resistor is opposite to the first electronic switch Connected at one end.
  • the charging circuit further includes a fourth resistor, one end of the fourth resistor is connected to the third end of the first electronic switch, and the other end of the fourth resistor is opposite to the second electronic switch Connected at one end.
  • the first electronic switch is an NMOS transistor
  • a gate of the NMOS transistor is a first end of the first electronic switch
  • a source of the NMOS transistor is a second end of the first electronic switch
  • the drain of the NMOS transistor is the third end of the first electronic switch.
  • the charging circuit further includes a third resistor, one end of the third resistor is connected to the second end of the secondary coil of the transformer, and the other end of the third resistor is opposite to the first electronic switch Connected at one end.
  • the charging circuit further includes a fourth resistor, one end of the fourth resistor is connected to the third end of the first electronic switch, and the other end of the fourth resistor is opposite to the second electronic switch Connected at one end.
  • the second electronic switch is a PNP transistor
  • the base of the PNP transistor is the first end of the second electronic switch
  • the emission of the PNP transistor is the second end of the second electronic switch.
  • the collector of the PNP transistor is the third end of the second electronic switch.
  • the charging circuit further includes a third resistor, one end of the third resistor is connected to the second end of the secondary coil of the transformer, and the other end of the third resistor is opposite to the first electronic switch Connected at one end.
  • the charging circuit further includes a fourth resistor, one end of the fourth resistor is connected to the third end of the first electronic switch, and the other end of the fourth resistor is opposite to the second electronic switch Connected at one end.
  • the second electronic switch is a PMOS transistor
  • the gate of the PMOS transistor is a first end of the second electronic switch
  • the source of the PMOS transistor is a second end of the second electronic switch.
  • the drain of the PMOS transistor is the third end of the second electronic switch.
  • the charging circuit further includes a third resistor, one end of the third resistor is connected to the second end of the secondary coil of the transformer, and the other end of the third resistor is opposite to the first electronic switch Connected at one end.
  • the charging circuit further includes a fourth resistor, one end of the fourth resistor is connected to the third end of the first electronic switch, and the other end of the fourth resistor is opposite to the second electronic switch Connected at one end.
  • the invention also provides a charger, the charger comprising a charging circuit, the charging circuit comprising a first alternating current input terminal, a second alternating current input terminal, a transformer, a diode, a first resistor, a second resistor, a battery, and a first electronic switch And a second electronic switch;
  • a primary coil of the transformer is connected to the first alternating current input end and a second alternating current input end for accessing alternating current, and a secondary coil end of the transformer is respectively connected with the first end of the first electronic switch and the battery a negative pole is connected, the other end of the secondary coil of the transformer is connected to the second end of the first electronic switch, and is connected to the positive pole of the battery via the diode, the first resistor; the second electronic switch One end is connected to the third end of the first electronic switch, the second end of the second electronic switch is connected to the positive pole of the battery, and the third end of the second electronic switch is connected via the second resistor
  • the negative electrode of the battery is connected; when the alternating current is connected and the induced voltage of the secondary coil of the transformer is in a negative half cycle, the induced voltage drives the first electronic switch to be turned on to drive the second electronic switch to be turned on.
  • the battery is discharged through the second electronic switch and the second resistor; when no alternating current is connected, the first electronic switch and the second
  • the induced voltage of the secondary winding of the transformer when the induced voltage of the secondary winding of the transformer is in a negative half cycle, the induced voltage drives the first electronic switch to be turned on to drive the second electronic switch to be turned on, and the battery passes through the first The two electronic switches and the second resistor discharge to avoid the polarization voltage generated by the battery, thereby improving the charging efficiency of the charging circuit; and when the alternating current is not connected, the first electronic switch and the second electronic switch are both turned off, and the battery has no discharging circuit. It does not discharge, and the battery is discharged when the charging circuit is not connected to the alternating current, and the battery is depleted.
  • FIG. 1 is a schematic diagram showing the circuit structure of an embodiment of a conventional charging circuit
  • FIG. 2 is a schematic structural diagram of a circuit of another embodiment of a conventional charging circuit
  • FIG. 3 is a schematic view showing the circuit structure of a preferred embodiment of the charging circuit of the present invention.
  • the present invention provides a charging circuit.
  • FIG. 3 is a schematic structural diagram of a circuit of a preferred embodiment of a charging circuit of the present invention.
  • the charging circuit of the present invention includes a first AC input terminal V1, a second AC input terminal V2, a transformer TR, a diode D1, a first resistor R1, a second resistor R2, a battery BAT, and a first electron.
  • the primary coil of the transformer TR is connected to the first alternating current input terminal V1 and the second alternating current input terminal V2 to access alternating current, and the secondary coil end of the transformer TR and the first end of the first electronic switch Q1 are respectively Connected to the negative pole of the battery BAT, the other end of the secondary coil of the transformer TR is connected to the second end of the first electronic switch Q1, and via the diode D1, the first resistor R1 and the battery BAT a positive terminal is connected; a first end of the second electronic switch Q2 is connected to a third end of the first electronic switch Q1, and a second end of the second electronic switch Q2 is connected to a positive end of the battery BAT, The third end of the second electronic switch Q2 is connected to the negative pole of the battery BAT via the second resistor R2; when the alternating current is connected and the induced voltage of the secondary coil of the transformer TR is in a negative half cycle, the sensing The voltage driving the first electronic switch Q1 is turned on to drive the second electronic switch Q2 to be turned on
  • the induced voltage generated in the secondary coil of the transformer TR after the primary coil of the transformer TR is energized is in the transformer.
  • the induced voltage charges the battery BAT through the diode D1 and the first resistor R1, and when the induced voltage of the secondary coil is in the negative half cycle, the induced voltage is output to
  • the first end of the first electronic switch Q1 drives the first electronic switch Q1 to be turned on, such that the first end of the second electronic switch Q2 is at a low level, and the second electronic switch Q2 is turned on, at which time the battery BAT passes the second
  • the electronic switch Q2 and the second resistor R2 are discharged to prevent the battery BAT from generating a polarization voltage, thereby improving the charging efficiency of the charging circuit; and, when the first AC input terminal V1 and the second AC input terminal V2 are not connected to the
  • the first electronic switch Q1 is an NPN transistor
  • the base of the NPN transistor is extremely first end of the first electronic switch Q1
  • the emission of the NPN transistor is extremely second of the first electronic switch Q1
  • the collector of the NPN transistor is the third end of the first electronic switch Q1.
  • FIG. 3 is only an example of the first electronic switch Q1 being an NPN transistor.
  • the first electronic switch Q1 may also be an NMOS transistor, and the gate of the NMOS transistor is the first electronic switch Q1.
  • the first end of the NMOS transistor is the second end of the first electronic switch Q1, and the drain of the NMOS transistor is the third end of the first electronic switch Q1.
  • the second electronic switch Q2 is a PNP transistor
  • the base of the PNP transistor is extremely first end of the second electronic switch Q2
  • the emission of the PNP transistor is extremely second of the second electronic switch Q2
  • the collector of the PNP transistor is the third end of the second electronic switch Q2.
  • FIG. 3 is only a second electronic switch Q2 as a PNP transistor.
  • the second electronic switch Q2 may also be a PMOS transistor, and the gate of the PMOS transistor is the second electronic switch Q2.
  • the first end of the PMOS tube is the second end of the second electronic switch Q2, and the drain of the PMOS tube is the third end of the second electronic switch Q2.
  • the charging circuit further includes a third resistor R3, one end of the third resistor R3 is connected to the second end of the secondary coil of the transformer TR, and the third resistor R3 is further One end is connected to the first end of the first electronic switch Q1.
  • the third resistor R3 is used to limit the voltage signal input to the first end of the first electronic switch Q1 to protect the first electronic switch Q1 from being burned out.
  • the charging circuit further includes a fourth resistor R4, one end of the fourth resistor R4 is connected to the third end of the first electronic switch Q1, and the fourth resistor R4 is another One end is connected to the first end of the second electronic switch Q2.
  • the fourth resistor R4 is used to limit the voltage signal input to the first end of the second electronic switch Q2 to protect the second electronic switch Q2 from being burned out.
  • the primary coil of the transformer TR When the first AC input terminal V1 and the second AC input terminal V2 are connected to the external power source to connect the AC power, the primary coil of the transformer TR is energized, and at this time, the secondary coil of the transformer TR generates an induced voltage when the induced voltage is in a positive half cycle.
  • the induced voltage When the induced voltage is rectified by the diode D1, it is output to the anode of the battery BAT through the first resistor R1 to charge the battery BAT.
  • the induced voltage generated by the secondary coil of the transformer TR is in a negative half cycle
  • the induced voltage is output to the first end of the first electronic switch Q1 via the third resistor R3, so that the first end of the first electronic switch Q1 (ie, NPN)
  • the base of the transistor or the gate of the NMOS transistor is at a high level, because the second end of the first electronic switch Q1 (ie, the emitter of the NPN transistor or the source of the NMOS transistor) is at a low level, thereby being first
  • the electronic switch Q1 is turned on.
  • the first end of the second electronic switch Q2 (ie, the base of the PNP transistor or the gate of the PMOS tube) is equivalent to being connected to the second end of the first electronic switch Q1 via the fourth resistor R4. Therefore, the first end of the second electronic switch Q2 is also a low level, and the second end of the second electronic switch Q2 (ie, the emitter of the PNP transistor or the source of the PMOS tube) is connected to the positive pole of the battery BAT, the second electron The second end of the switch Q2 is at a high level, so that the second electronic switch Q2 is also turned on.
  • the positive electrode of the battery BAT, the second end of the second electronic switch Q2, the third end of the second electronic switch Q2, the second resistor R2, and the negative electrode of the battery BAT constitute a discharge loop.
  • the battery BAT is discharged through the second electronic switch Q2 and the second resistor R2 to prevent the battery BAT from generating a polarization voltage for the purpose of depolarization.
  • the primary coil of the transformer TR is not energized, and accordingly, the secondary coil of the transformer TR does not generate an induced voltage, and the first electronic switch Q1 is Without the driving voltage, it is in the off state, and the second electronic switch Q2 is also in the off state.
  • the charging circuit has no discharging circuit, and the battery BAT is not discharged because there is no discharging circuit, so that the battery BAT is not consumed.
  • the present invention also provides a charger, which includes a charging circuit.
  • a charger which includes a charging circuit.
  • the circuit structure, working principle and beneficial effects of the charging circuit are not described herein again with reference to the above embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un circuit de charge et un chargeur. Le circuit de charge comprend une première entrée de courant alternatif (V1), une seconde entrée de courant alternatif (V2), un transformateur (TR), une diode (D1), une première résistance (R1), une seconde résistance (R2), une batterie (BAT), un premier commutateur électronique (Q1) et un second commutateur électronique (Q2). Lorsque la première entrée de courant alternatif (V1) et la seconde entrée de courant alternatif (V2) sont alimentées en courant alternatif et qu'une tension induite d'une bobine secondaire du transformateur (TR) est en demi-cycle négatif, la tension induite attaque le premier commutateur électronique (Q1) de sorte à le mettre sous tension en vue d'attaquer le second commutateur électronique (Q2) de sorte à le mettre sous tension, et la batterie (BAT) se décharge par le biais du second commutateur électronique (Q2) et de la seconde résistance (R2). Lorsque la première entrée de courant alternatif (V1) et la seconde entrée de courant alternatif (V2) ne sont pas alimentées en courant alternatif, le premier commutateur électronique (Q1) et le second commutateur électronique (Q2) sont tous deux mis hors tension, et la batterie (BAT) ne se décharge pas. La présente invention peut améliorer l'efficacité de charge du circuit de charge, tout en empêchant le circuit de charge de se décharger lorsqu'il n'est pas alimenté en courant alternatif.
PCT/CN2015/090264 2015-06-03 2015-09-22 Circuit de charge et chargeur Ceased WO2016192248A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201520376432.2 2015-06-03
CN201520376432.2U CN204696770U (zh) 2015-06-03 2015-06-03 充电电路和充电器

Publications (1)

Publication Number Publication Date
WO2016192248A1 true WO2016192248A1 (fr) 2016-12-08

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PCT/CN2015/090264 Ceased WO2016192248A1 (fr) 2015-06-03 2015-09-22 Circuit de charge et chargeur

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CN (1) CN204696770U (fr)
WO (1) WO2016192248A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108282010A (zh) * 2018-03-06 2018-07-13 北京小米移动软件有限公司 用于充电接口的防腐蚀电路和充电器
CN112491115A (zh) * 2020-11-25 2021-03-12 四川长虹电器股份有限公司 备用充电电池电源管理电路

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106787041A (zh) * 2016-12-13 2017-05-31 深圳Tcl数字技术有限公司 电池充电电路及充电装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2201750Y (zh) * 1994-03-21 1995-06-21 王勤 一种快速充电器
JPH08190937A (ja) * 1995-01-13 1996-07-23 Saitama Nippon Denki Kk 充電装置
CN2393250Y (zh) * 1999-10-14 2000-08-23 李德华 密封铅酸蓄电池修复充电器
CN2616690Y (zh) * 2002-12-31 2004-05-19 王志强 汽车油底机油预热及车载快速充电装置
CN2686185Y (zh) * 2004-02-24 2005-03-16 张建兴 脉冲式充电器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2201750Y (zh) * 1994-03-21 1995-06-21 王勤 一种快速充电器
JPH08190937A (ja) * 1995-01-13 1996-07-23 Saitama Nippon Denki Kk 充電装置
CN2393250Y (zh) * 1999-10-14 2000-08-23 李德华 密封铅酸蓄电池修复充电器
CN2616690Y (zh) * 2002-12-31 2004-05-19 王志强 汽车油底机油预热及车载快速充电装置
CN2686185Y (zh) * 2004-02-24 2005-03-16 张建兴 脉冲式充电器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108282010A (zh) * 2018-03-06 2018-07-13 北京小米移动软件有限公司 用于充电接口的防腐蚀电路和充电器
CN112491115A (zh) * 2020-11-25 2021-03-12 四川长虹电器股份有限公司 备用充电电池电源管理电路

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