WO2012171197A1 - Appareil et procédé permettant une égalisation du contrôle d'une batterie au lithium - Google Patents

Appareil et procédé permettant une égalisation du contrôle d'une batterie au lithium Download PDF

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Publication number
WO2012171197A1
WO2012171197A1 PCT/CN2011/075802 CN2011075802W WO2012171197A1 WO 2012171197 A1 WO2012171197 A1 WO 2012171197A1 CN 2011075802 W CN2011075802 W CN 2011075802W WO 2012171197 A1 WO2012171197 A1 WO 2012171197A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
shunt
cell
shunting
temperature value
Prior art date
Application number
PCT/CN2011/075802
Other languages
English (en)
Chinese (zh)
Inventor
刘伟
刘新宇
水伟
Original Assignee
华为技术有限公司
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
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201180000816.9A priority Critical patent/CN102232261B/zh
Priority to PCT/CN2011/075802 priority patent/WO2012171197A1/fr
Publication of WO2012171197A1 publication Critical patent/WO2012171197A1/fr

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Classifications

    • 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
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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 present invention relates to a lithium battery charging apparatus and method, and more particularly to a lithium battery equalization control apparatus and method.
  • Lithium batteries are widely used in electronic equipment due to their high energy, long cycle life, high energy density and stable operating voltage.
  • the capacity of the battery pack depends on the capacity of each single battery, wherein the capacity of the lithium battery is related to its voltage value.
  • each unit cell In order to charge the battery pack during the charging of the battery pack, each unit cell needs to reach the rated voltage.
  • a single battery has a lower capacity, its voltage is lower than that of other single cells. At this time, in order to reach the rated voltage of the battery pack, overcharging of other single cells may occur, which may cause lithium battery explosion. .
  • a lithium battery equalization control device as shown in FIG. 1, includes a battery pack, a shunt unit, a voltage detecting unit and a control unit; each of the single cells and a shunt in the battery pack The circuit is connected in parallel, and the shunt circuit is provided with an energy consuming component; the shunt circuit is connected to the control unit; the control unit is connected to the voltage detecting unit; and the voltage detecting unit is connected to the single battery in the battery pack.
  • the control unit When charging the battery pack in the electronic device, detecting the voltage of each of the single cells through the voltage collecting unit; when the difference between the voltage of one of the single cells and the voltage of the other cells is greater than a set value, Turn on the shunt circuit. For example, when the voltage of the single cell 1 and the voltage of the cell 4 differ by 20 millivolts, the control unit turns on the shunt circuit 4 corresponding to the cell 4, and the energy consuming component shunts the charging current of the cell 4. The charging speed of the unit cell 4 is lowered, and the unit cell 1 maintains the original charging speed; when the difference is reduced to 5 mV, the shunt circuit 4 is turned off, and the charging speed of the unit cell 4 is restored to achieve a balanced effect.
  • the electric energy is consumed by the shunting unit to generate heat.
  • the generated heat is increased, and the heat is not dissipated in time, which may cause the electronic device to function abnormally.
  • Embodiments of the present invention provide a lithium battery equalization control apparatus and method for preventing overheating of an electronic device during a lithium battery equalization process.
  • a lithium battery equalization control device comprising a battery pack, a dispatching unit, a shunting unit and a voltage collecting unit, wherein a voltage collecting unit is disposed on a side of the single battery in the battery pack; and the single battery and the shunt unit
  • the shunting circuit is connected in parallel; the shunting unit and the voltage collecting unit are respectively connected to the dispatching unit; and the temperature collecting unit is disposed on one side of the shunting unit; the temperature collecting unit is connected to the dispatching unit;
  • the battery pack is composed of at least two single cells connected in series;
  • the shunting unit is configured to shunt a charging current to reduce a charging speed of the single battery, the shunting unit includes at least two shunt circuits, and the shunting circuit includes an energy consuming component;
  • the voltage clamping unit is configured to collect voltage values of the single cells
  • the temperature collecting unit is configured to collect temperature values of the shunting unit
  • the scheduling unit is configured to control on-off of the shunt circuit in the shunting unit according to the voltage value and the temperature value collected by the dimming to achieve equalization of the capacity of the single cell and prevent the shunting unit from overheating.
  • a lithium battery equalization control method includes:
  • the temperature collecting unit obtains a current temperature value of the shunting unit
  • the scheduling unit determines whether the current temperature value of the shunt unit is greater than the set superheat temperature value
  • the lithium battery equalization control device and method provided by the embodiment of the invention collects the temperature of the shunt unit through the temperature collecting unit, and when the temperature exceeds the preset superheat temperature value, disconnects the shunt circuit corresponding to the single cell, and reduces The heat generated by the shunt unit prevents overheating of the electronic device when the cell is balanced, and improves the stability of the electronic device.
  • FIG. 1 is a schematic structural view of a lithium battery equalization control device in the background art of the present invention.
  • FIG. 2 is a schematic structural diagram of a lithium battery equalization control device according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a lithium battery equalization control method according to an embodiment of the present invention
  • FIG. 4 is a lithium battery equalization control method according to an embodiment of the present invention
  • a flow chart for controlling the shunt circuit
  • FIG. 5 is a flowchart of a disconnection circuit of a lithium battery equalization control method when the temperature is too high according to an embodiment of the present invention
  • FIG. 6 is a flow chart of restoring a shunt of a lithium battery equalization control method according to an embodiment of the present invention.
  • a lithium battery equalization control device as shown in FIG. 2, includes a battery pack, a dispatching unit, a shunting unit, and a voltage collecting unit, and a voltage collecting unit is disposed on a side of the single battery in the battery pack;
  • the battery and the shunting circuit in the shunting unit are connected in parallel; the shunting unit and the voltage collecting unit are respectively connected to the dispatching unit; and the temperature collecting unit is disposed on one side of the shunting unit; the temperature collecting unit is connected to the dispatching unit;
  • the battery pack is composed of at least two single cells connected in series;
  • the shunting unit is configured to shunt a charging current to reduce a charging speed of the single battery, the shunting unit includes at least two shunt circuits, and the shunting circuit includes an energy consuming component;
  • the voltage clamping unit is configured to collect voltage values of the single cells;
  • the temperature collecting unit is configured to collect temperature values of the shunting unit;
  • the scheduling unit is configured to control on-off of the shunt circuit in the shunting unit according to the voltage value and the temperature value collected by the dimming to achieve equalization of the capacity of the single cell and prevent the shunting unit from overheating.
  • the voltage clamping unit collects the voltage value of each single battery in the battery group, and sends the voltage value to the scheduling unit;
  • the temperature collecting unit collects the temperature of the dividing unit, and sends the temperature value to the scheduling unit;
  • the shunt unit is controlled according to the received voltage value and the temperature value, and the battery pack is equalized during the charging process to prevent the heat generated by the shunt unit from being excessively caused by the shunt unit during the equalization process, thereby improving the charging of the electronic device. stability.
  • the present invention also provides a lithium battery equalization control method, as shown in FIG. 3, including:
  • Step 3 00 setting the superheat temperature value of the shunt unit in the scheduling unit
  • the temperature value is generally set within the safe temperature range of the electronic device.
  • the superheating temperature value can be set to 80 degrees.
  • Step 4 00 setting a voltage difference value for shunting the single battery in the scheduling unit, which is called a shunt voltage difference
  • the voltage difference is called the shunt voltage difference.
  • the shunt voltage difference For example, set the shunt voltage difference to 20 mV.
  • Step 4 01. The voltage collecting unit obtains the voltage value of each single battery, and determines the single battery corresponding to the minimum voltage value, which is called a short-plate single battery.
  • the scheduling unit acquires voltage values of the respective single cells collected by the voltage collecting unit,
  • the single cell corresponding to the minimum voltage value is referred to as a short-board single cell, and the other single cells are shunted according to the short-board single cell to achieve equalization of the cell capacity, as shown in FIG.
  • the unit cell 1 is the short-plate single cell having a voltage value of 3000 mV.
  • Step 4 02 the scheduling unit determines whether the voltage difference between the single battery and the short battery unit is greater than the voltage difference of the shunt
  • the voltage value of the single cell 2 is 3 300 mV
  • the cell 3 has a voltage value of 3 027 mV
  • the cell 4 has a voltage of 3 001 mV
  • the cell 5 has a voltage of 32 0 3 mV.
  • Step 4 03 If the voltage difference between the single cell and the short cell is greater than the shunt voltage difference, turn on the shunt circuit corresponding to the cell, shunt the cell, and reduce the charging of the cell. Speed
  • the scheduling unit controls the shunt circuit corresponding to the single battery to be turned on, that is, the shunt circuit 2, the shunt circuit 3, and the shunt circuit 5 are turned on, shunting the single cells, and reducing the charging speed of the corresponding single cells.
  • the energy is dissipated by the energy consuming element, heat is generated on the energy consuming element, and the temperature rises.
  • Step 3 01. The temperature collection unit obtains the current temperature value of the shunt unit.
  • the temperature collection unit on the side of the diverting unit is collected at intervals of, for example, 82 degrees.
  • Step 302 The scheduling unit determines whether the current temperature value of the shunt unit is greater than the set superheat temperature value.
  • the dispatch unit compares the current temperature value with the superheat temperature value to determine that 82 degrees is greater than the set superheat temperature value of 80 degrees.
  • Step 303 If the scheduling unit determines that the current temperature value of the shunt unit is greater than the set superheat temperature value, disconnecting the shunt circuit to reduce the shunt circuit generated by the shunt unit Heat, lower the temperature of the split unit
  • the shunt circuit needs to be controlled to reduce the heat generated by the shunt circuit, as shown in FIG.
  • Step 510 The scheduling unit compares the voltage difference between the short-cell single-cell and the single-cell connected to the shunt circuit according to the voltage value of the single-cell battery collected by the voltage-collecting unit, according to the obtained voltage of the single-cell battery Value, comparing the voltage difference between the short-cell single cell and the single-cell connected to the plurality of shunt circuits, for example, the voltage difference between the single-cell battery 2 and the short-plate single-cell battery is 300 mV, the single cell 3 The voltage difference between the short cell and the single cell is 27 mV, and the voltage difference between the cell 5 and the short cell is 2 03 volts.
  • Step 5 01 Determine a cell having the smallest voltage difference from the short cell single cell, and determine a cell having the smallest voltage difference according to the voltage difference, that is, a cell
  • Step 5 02. Disconnect the shunt circuit of the single cell to reduce the heat generated by the shunt unit.
  • the voltage difference between the single cell 3 and the short cell is the smallest, it can be determined that the capacity difference between the cell 3 and the short cell is small, and the shunt circuit 3 of the cell 3 is disconnected. In order to reduce the heat generated in the shunt circuit, at this time, as the energy-consuming element generating heat is reduced, the temperature on the side of the shunt unit is gradually decreased.
  • the temperature of the shunt unit is again collected. If the temperature still does not reach a predetermined value, then according to the above steps, the shunt circuit of a single battery is disconnected.
  • the shunt circuit is reconnected to shunt the cells, as shown in FIG. 6, including:
  • Step 6 00 setting a temperature value of the shunting circuit in the shunting unit to be re-connected in the scheduling unit, which is called a restarting temperature value.
  • step 300 setting a shunt circuit in the shunt circuit to be turned back on
  • the preset value of the temperature which is called the restart temperature value, for example, the restart temperature value is 60 degrees.
  • the scheduling unit determines that the current temperature value of the shunting unit is greater than the set superheating temperature value, the shunt circuit is disconnected, the heat generated by the shunting circuit in the shunting unit is reduced, and after the shunting unit temperature is lowered, the method further includes:
  • Step 6 01 Determine whether the current temperature value of the shunt unit is less than the restart temperature value.
  • the temperature unit collects the current temperature value of the shunt unit, for example, the current temperature value is 58 degrees, and determines whether the collected temperature value is less than Restart the temperature value.
  • the collected temperature of 58 degrees is less than the set minimum temperature value of 60 degrees, and the voltage difference between the short-plate single cell and the single cell that is not connected to the shunt circuit is compared, for example, the single cell 3 is in the shunt When the temperature value of the unit is greater than the superheat temperature value, the shunt unit 3 corresponding to the unit cell 3 has been disconnected.
  • Step 6 03. Determine a single cell that has a voltage difference from the short-board single cell that is greater than a shunt voltage difference.
  • the voltage of the single cell 3 is 3027 mV, and the voltage difference of 3000 mV from the short cell unit voltage is 27 mV, which is greater than the shunt voltage difference of 20 mV.
  • Step 6 Connect the shunt circuit corresponding to the single battery to re-divide the single battery in the battery pack.
  • the shunt circuit 3 corresponding to the unit cell 3 is reconnected, and the unit cell 3 is re-divided to equalize the capacity of the unit cell.
  • the temperature value of the shunt cell is less than the restart temperature value, the cell with a voltage difference between the short cell and the cell is greater than the shunt voltage difference.
  • the corresponding shunt circuits are all turned on, and the shunting is continued to balance the capacities of the single cells in the battery pack and the short cell single cells.
  • the temperature of the shunt unit is collected by a temperature collecting unit, when the temperature exceeds a preset superheat temperature value, Disconnect the shunt circuit corresponding to the single cell, reduce the heat generated by the shunt unit, prevent the electronic device from overheating when the cell is balanced, and improve the stability of the electronic device.

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

Abstract

L'invention, qui appartient au domaine du stockage de l'énergie électrique et qui est conçue pour résoudre le problème lié à une anomalie d'un équipement électronique provoquée par une température excessive d'une unité de dérivation pendant l'égalisation du contrôle d'un bloc de batteries au lithium, se rapporte à un appareil et à un procédé permettant une égalisation du contrôle d'une batterie au lithium. L'appareil permettant une égalisation du contrôle d'une batterie au lithium comprend un bloc de batteries, une unité de planification, une unité de dérivation et une unité de collecte de données de tension qui est agencée sur un côté des cellules de batterie du bloc de batteries, les cellules de batterie étant raccordées en parallèle aux circuits en dérivation de l'unité de dérivation, l'unité de dérivation et l'unité de collecte de données de tension étant raccordées respectivement à l'unité de planification, et une unité de collecte de données de température raccordée à l'unité de planification étant agencée sur un côté de l'unité de dérivation.
PCT/CN2011/075802 2011-06-16 2011-06-16 Appareil et procédé permettant une égalisation du contrôle d'une batterie au lithium WO2012171197A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180000816.9A CN102232261B (zh) 2011-06-16 2011-06-16 一种锂电池均衡控制设备和方法
PCT/CN2011/075802 WO2012171197A1 (fr) 2011-06-16 2011-06-16 Appareil et procédé permettant une égalisation du contrôle d'une batterie au lithium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/075802 WO2012171197A1 (fr) 2011-06-16 2011-06-16 Appareil et procédé permettant une égalisation du contrôle d'une batterie au lithium

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WO2012171197A1 true WO2012171197A1 (fr) 2012-12-20

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CN (1) CN102232261B (fr)
WO (1) WO2012171197A1 (fr)

Cited By (2)

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EP3026750A1 (fr) * 2014-11-28 2016-06-01 Siemens Aktiengesellschaft Procédé de mise en symétrie d'un système d'accumulation d'énergie
CN114172221A (zh) * 2020-09-11 2022-03-11 郑州深澜动力科技有限公司 一种多支路电池系统的防过充控制系统

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CN103607001A (zh) * 2013-11-04 2014-02-26 江苏嘉钰新能源技术有限公司 电池分流均衡方法
CN104578275B (zh) * 2014-12-24 2017-02-01 广东欧珀移动通信有限公司 充电方法和电子设备

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US6631066B1 (en) * 2000-05-05 2003-10-07 National Semiconductor Corporation Apparatus and method for initiating crowbar protection in a shunt regulator
CN101471575A (zh) * 2007-12-28 2009-07-01 凹凸科技（中国）有限公司 多电池组均衡控制电路
CN101471460A (zh) * 2007-12-28 2009-07-01 深圳市比克电池有限公司 对电池组进行均衡控制的方法和电池组充电方法

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CN101795010B (zh) * 2009-12-31 2012-07-18 惠州市亿能电子有限公司 一种锂电池保护方法
CN101752890A (zh) * 2010-01-26 2010-06-23 上海中科深江电动车辆有限公司 电池管理系统均衡装置及方法

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US5767659A (en) * 1991-10-30 1998-06-16 Texas Instruments Incorporated Batteries and battery systems
CN1334630A (zh) * 2000-04-07 2002-02-06 摩托罗拉公司 具有自含热短路安全保护的分路电压调节器
US6631066B1 (en) * 2000-05-05 2003-10-07 National Semiconductor Corporation Apparatus and method for initiating crowbar protection in a shunt regulator
CN101471575A (zh) * 2007-12-28 2009-07-01 凹凸科技（中国）有限公司 多电池组均衡控制电路
CN101471460A (zh) * 2007-12-28 2009-07-01 深圳市比克电池有限公司 对电池组进行均衡控制的方法和电池组充电方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3026750A1 (fr) * 2014-11-28 2016-06-01 Siemens Aktiengesellschaft Procédé de mise en symétrie d'un système d'accumulation d'énergie
WO2016083223A1 (fr) * 2014-11-28 2016-06-02 Siemens Aktiengesellschaft Procédé d'équilibrage d'un système de stockage d'énergie
US10449869B2 (en) 2014-11-28 2019-10-22 Seimens Aktiengesellschaft Method for symmetrizing an energy storage system
CN114172221A (zh) * 2020-09-11 2022-03-11 郑州深澜动力科技有限公司 一种多支路电池系统的防过充控制系统
CN114172221B (zh) * 2020-09-11 2024-03-26 郑州深澜动力科技有限公司 一种多支路电池系统的防过充控制系统

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CN102232261A (zh) 2011-11-02

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