WO2021114683A1 - Chargeur et son procédé de charge - Google Patents

Chargeur et son procédé de charge Download PDF

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Publication number
WO2021114683A1
WO2021114683A1 PCT/CN2020/104883 CN2020104883W WO2021114683A1 WO 2021114683 A1 WO2021114683 A1 WO 2021114683A1 CN 2020104883 W CN2020104883 W CN 2020104883W WO 2021114683 A1 WO2021114683 A1 WO 2021114683A1
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WO
WIPO (PCT)
Prior art keywords
charging
voltage
battery
circuit
constant
Prior art date
Application number
PCT/CN2020/104883
Other languages
English (en)
Chinese (zh)
Inventor
杨新新
程志明
余杰
陈�胜
谢爽
叶剑
Original Assignee
超威电源集团有限公司
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
Priority claimed from CN201911250906.8A external-priority patent/CN111342156A/zh
Application filed by 超威电源集团有限公司 filed Critical 超威电源集团有限公司
Priority to CN202021580001.5U priority Critical patent/CN212462861U/zh
Priority to CN202010766954.9A priority patent/CN112087018A/zh
Priority to CN202010767493.7A priority patent/CN112087019A/zh
Priority to CN202010856637.6A priority patent/CN112087025A/zh
Priority to CN202021778532.5U priority patent/CN214429270U/zh
Publication of WO2021114683A1 publication Critical patent/WO2021114683A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to the field of storage batteries.
  • two-stage charging is used, namely, the fast charging stage and the slow charging stage.
  • three-stage charging namely the initial fast charge stage, the intermediate slow charge stage, and the late float charge stage.
  • the initial constant current or constant pressure fast charge stage, the intermediate constant pressure slow charge stage, and the later constant pressure or constant current floating charge stage Initially use low voltage and high current to shorten the charging time; after the battery voltage rises to a certain value, switch to high voltage and low current to prevent battery overcharging; after the battery is basically fully charged, change to a relatively low voltage to float charge level to reduce Small damage to the battery.
  • the battery During the slow charging phase, the battery will produce a lot of gas, which will increase the water loss, increase the side reaction of charging, and increase the battery's heat release, which is likely to cause the battery to experience thermal runaway.
  • the traditional charging system on the market sets unreasonable jump conditions at this stage, and it is usually controlled by the current value.
  • the risk of this setting is that the battery is always in the high-voltage charging stage and cannot jump to the floating charging stage. It is easy to cause the battery to produce thermal runaway; it will also cause the battery life to decrease, and in serious cases, it will cause safety risks. Therefore, a safe charging system is needed to avoid thermal runaway of the battery and cause damage to the battery.
  • the present invention provides a charger, which includes a charging circuit, a controller, and a voltage detection circuit.
  • the charging circuit and the voltage detection circuit are electrically connected to the controller.
  • the charger is characterized in that it also includes a timing circuit. According to the detection signal of the voltage detection circuit, the controller controls the charging circuit through the timing circuit.
  • the charging circuit includes a constant current charging circuit and a constant voltage charging circuit, and the controller controls the constant voltage charging circuit according to the detection signal of the voltage detection circuit.
  • the present invention also protects a battery charging method, which includes the following steps: step 1: fast charging; step 2: slow charging; characterized in that the slow charging in step 2 is slow charging within a limited time.
  • step 2 charge for 1-3 hours within a limited time.
  • the charging method further includes step 3, and the step 3 is floating charging.
  • the fast charging in the step 1 includes charging until the cell voltage of the battery reaches a predetermined value;
  • the slow charging in the step 2 includes charging at a constant voltage limit, and when the battery voltage reaches the constant charging voltage, start timing.
  • the predetermined value of the single cell voltage is between 2.3V and 2.4V.
  • step 1 constant current charging is performed, and the charging current is between 0.15C and 1.0C.
  • the charging voltage is between 2.40V-2.55V.
  • the floating charging is constant current or constant voltage charging.
  • the constant charging current in step 3 is between 0.005C and 0.05C.
  • the charging constant voltage in step 3 is between 2.28V-2.35V.
  • the charging method and device of the present invention can effectively prevent thermal runaway during battery charging, and additionally ensure the battery life.
  • FIG. 1 is a circuit block diagram of the charger of the present invention.
  • the present invention provides a lead-acid battery 6 charger, which includes a switch circuit 1, a charging circuit 2, a voltage detection circuit 3, a timing circuit 4, and a controller 5.
  • the switch circuit 1 is used to complete the AC-DC conversion of the mains, provide the working power of other circuit modules in the charger, and provide the charging current or charging voltage;
  • the charging circuit 2 is used to receive the charging current or charging provided by the switch circuit 1
  • the voltage signal provides the charging current or charging voltage signal to the battery 6;
  • the voltage and current detection circuit 3 realizes battery voltage detection, and sends the detection result to the controller 5;
  • the controller 5 detects the voltage and current detection circuit 3 As a result, when the conditions are met, the timer circuit 4 is activated and the charging circuit 2 is controlled to enter the corresponding time-limited charging mode.
  • the mains power is converted into a controllable charging voltage or charging current signal through AC-DC (AC-DC).
  • AC-DC AC-DC
  • the controller controls the charging circuit and enters the first stage, the fast charging stage.
  • the current I1 is constant current charging, the current I1 is preferably between 0.15C-1.0C, and constant voltage or constant power fast charging is also possible.
  • the controller turns on the voltage detection circuit to detect the battery voltage. If the detected voltage value reaches the battery cell voltage, it is better to reach 2.3V-2.4V. At this time, the controller controls the switch circuit and charges the battery according to the input signal of the voltage detection circuit.
  • the circuit enters the second stage, charging with a small current such as 0.1C.
  • the timing circuit When the voltage reaches the constant voltage of this stage, the timing circuit is activated and the charging circuit is controlled to perform a limited time constant voltage charging.
  • the constant single cell voltage for charging is preferably 2.40V-2.55V
  • the controller controls the charging circuit to enter the third stage, that is, the floating charge stage. It is best to charge with a constant current between 0.005C and 0.05C or to use a constant current between 0.005C and 0.05C Single-cell voltage between V-2.35V and constant voltage charging for a period of time until the entire charging process is completed.
  • the charging method of the lead-acid battery of the present invention is as follows: Step 1, the initial fast charging stage, such as high current constant current charging, the charging current is 0.15C to 1.0C, and the voltage limit is 2.3V/single cell to 2.40V/single cell. At this stage, the state of charge of the battery is low, the charge acceptance ability is strong, and the charging voltage basically does not produce hydrogen evolution. Generally, the negative electrode is charged to about 90% of the state of charge. Setting a larger current to charge can not only shorten the charging time, but also affect the battery capacity.
  • the test proves that when the voltage is charged to 2.3V/single cell, the battery begins to gas out; when the voltage is charged to 2.3V ⁇ 2.50V, the gas out rate obviously starts to increase.
  • Step 2 the intermediate slow charging stage, such as charging at a constant voltage limit, after step 1, the negative electrode charging is basically completed, and the main function of this stage is to make the positive electrode fully charged.
  • the battery's charge acceptance capability is poor, and a large amount of gas will be generated if an excessive current or an excessively high voltage is set, resulting in increased water loss and easy thermal runaway of the battery.
  • the parameter settings are as follows: voltage limit 2.40V/single cell ⁇ 2.55V/single cell, the voltage can be charged with a small current such as 0.1C, when the voltage reaches the constant voltage of this stage, the timing starts, and the time limit is 1-3h, and the time limit is passed The risk of thermal runaway caused by the increase in battery temperature can be avoided, and battery life can be guaranteed.
  • Step 3 The later floating charge stage, such as the small current reinforcement stage. At this time, the battery is basically processed at the full stage, and the main function is to balance/reinforce each single battery and each single cell lagging behind. Parameters: charging current 0.005C ⁇ 0.05C, unlimited voltage.
  • test sample for this verification, and the test is carried out in a three-stage charging system. Two samples are selected for each embodiment, and the purpose of the present invention is further proved through the examples.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 0.5h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 1.0h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 1.5h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 2.0h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 2.5h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 3.0h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 3.5h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • Step 1 Charge at a constant current of 0.2C to a voltage of 2.4V/single cell
  • Step 2 Constant voltage 2.46V/single cell, charging time 4.0h;
  • Step 3 Charge at a constant current of 0.02C for 3h.
  • the battery temperature at the end of step 2 is tested and the water loss is measured.
  • the data is as follows:
  • the average battery cycle life is 243 times, which is 0.5 hours higher than that of charging, and the cycle life is greatly improved; when the battery is charged for 3 hours in the second stage, the average battery cycle The service life is 251 times. When it reaches 3.5 hours, the average cycle life is 152 times, which drops sharply. At this time, thermal runaway has a significant adverse effect on battery life. The time continues to extend and the temperature further rises, greatly increasing the risk of battery safety, and even causing the battery to catch fire.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention se rapporte à un chargeur. Le chargeur comprend un circuit de charge, un dispositif de commande et un circuit de détection de tension, le circuit de charge et le circuit de détection de tension étant électriquement connectés au dispositif de commande. Le chargeur comprend en outre un circuit de temporisation, au moyen duquel le dispositif de commande commande le circuit de charge en fonction d'un signal de détection provenant du circuit de détection de tension. Est aussi divulgué un procédé de charge pour une batterie. Selon le procédé et l'appareil de charge dans la présente invention, un emballement thermique peut être efficacement empêché dans un processus de charge de batterie ; en outre, la durée de vie d'une batterie est assurée.
PCT/CN2020/104883 2019-12-09 2020-07-27 Chargeur et son procédé de charge WO2021114683A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202021580001.5U CN212462861U (zh) 2019-12-09 2020-08-03 一种充电器
CN202010766954.9A CN112087018A (zh) 2019-12-09 2020-08-03 一种充电器及其充电方法
CN202010767493.7A CN112087019A (zh) 2019-12-09 2020-08-03 一种充电器及其充电方法
CN202010856637.6A CN112087025A (zh) 2019-12-09 2020-08-24 一种充电方法和充电器
CN202021778532.5U CN214429270U (zh) 2019-12-09 2020-08-24 一种充电器

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201911250906.8A CN111342156A (zh) 2019-12-09 2019-12-09 一种蓄电池的充电方法
CN201911250906.8 2019-12-09
CN202010425130 2020-05-19
CN202010425130.5 2020-05-19

Publications (1)

Publication Number Publication Date
WO2021114683A1 true WO2021114683A1 (fr) 2021-06-17

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PCT/CN2020/104883 WO2021114683A1 (fr) 2019-12-09 2020-07-27 Chargeur et son procédé de charge

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CN (3) CN111710930A (fr)
WO (1) WO2021114683A1 (fr)

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CN112968226A (zh) * 2021-02-04 2021-06-15 河南克能新能源科技有限公司 一种单格落后电池组的容量修复方法

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CN111769339A (zh) 2020-10-13
CN214429270U (zh) 2021-10-19

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