CN2886896Y - A charging/discharging balance control device for lithium battery pack - Google Patents

A charging/discharging balance control device for lithium battery pack Download PDF

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Publication number
CN2886896Y
CN2886896Y CN 200520128733 CN200520128733U CN2886896Y CN 2886896 Y CN2886896 Y CN 2886896Y CN 200520128733 CN200520128733 CN 200520128733 CN 200520128733 U CN200520128733 U CN 200520128733U CN 2886896 Y CN2886896 Y CN 2886896Y
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CN
China
Prior art keywords
lithium battery
charging
discharge
charge
control device
Prior art date
Application number
CN 200520128733
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Chinese (zh)
Inventor
郭晓锋
武铁声
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北京格林动力电源技术有限公司
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Priority to CN 200520128733 priority Critical patent/CN2886896Y/en
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Publication of CN2886896Y publication Critical patent/CN2886896Y/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

The utility model related a balancing control device for lithium battery charging or discharging combines the charger and the control circuit of lithium battery perfectly. The charger supplies power to the lithium battery in charging, and the charging monitoring module controls the lithium battery. When any lithium cell in the lithium battery is full, the charging monitoring module outputs order to energy conversion module for ordering the energy conversion module taking off excess power to make sure the monocell escaping overcharge. When the charge voltage, current and temperature of the lithium battery reach setting values, the charging of lithium battery will stop by controlling the charging controlling module. The charger detects the charging status of lithium battery on good condition of lithium battery and accomplishes the battery charging. The discharging monitoring module detects status of every monomeric lithium cell when the lithium battery discharging, and orders the discharging controlling module for stopping the discharging of lithium battery when any monomeric lithium cell reaching the discharging voltage.

Description

A kind of lithium battery group charging and discharging equalising control device

Technical field

The utility model relates to electronic technology field, relates in particular to a kind of charge/discharge control and management device of battery, particularly a kind of lithium battery group charging and discharging equalising control device.

Background technology

The invention of battery has brought very big convenience to people, and the invention of rechargeable battery not only brings bigger convenience to people, simultaneously because of the physical structure of battery itself can be repeatedly recycling, also brought considerable economic.Rechargeable battery develops into nickel-cadmium cell, Ni-MH battery by lead-acid battery, lithium ion battery that is developing till now and lithium polymer battery (below be referred to as lithium battery), lithium battery has been used fields such as mobile phone, digital camera and notebook computer through development in recent years, the highest 14.8V that is no more than of nominal voltage of lithium battery group when use in these fields that is to say that the lithium battery group has 4 cell series connection at most.This is because the difference of self capacity between the lithium battery individuality, internal resistance causes when the series connection of a plurality of (general more than 4) battery is used, because the bad lithium battery group performance that will cause of performance of individual cell is bad, the integral status of lithium battery group becomes worse and worse in being connected into the use of lithium battery group, thereby can not be applied to the occasion of big voltage, influence popularizing and using of its.And present many fields (as: the environmental protection electric motor car that is now developing) all needs to adopt a plurality of cell series connection raising lithium battery group voltages just can be applied.

Summary of the invention

The purpose of this utility model is to adopt a kind of lithium battery group charging and discharging equalising control device, the control charger charges to the lithium battery group, control the discharge process of battery pack simultaneously, controlled lithium battery group become worse and worse phenomenon of integral status in use effectively.

The purpose of this utility model is achieved through the following technical solutions:

A kind of lithium battery group charge balancing control device comprises:

Charging control circuit: be used to control charger battery pack is charged; Described charging control circuit comprises:

Charge control module: according to the charging monitoring module monitors to the performance parameter control charger and the energy conversion module of battery pack battery pack is charged;

Charging monitoring module: the performance parameter of monitoring battery pack;

Energy conversion module: when the charging monitoring module monitors has reached to the charging limit set to the performance parameter of certain battery of battery pack, no longer to this battery charge, the excess energy of charger is transferred to energy conversion module by charge control module control.

Described energy conversion module comprises:

Power conversion switch: receive the control command of charge control module, open or close energy converter;

Energy converter: the excess energy that is used to consume charger.

Described charging monitoring module and/or energy conversion module are one or more.

Charge control module in the described charging control circuit, charging monitoring module and/or energy conversion module are located in battery pack and/or the charger.

A kind of lithium battery group equalization discharge control device is characterized in that:

Charge/discharge control circuit: be used for controlling in the course of the work battery power discharge; Described charge/discharge control circuit comprises:

Discharge control module: according to the discharge work to electrical appliance of the performance parameter control battery pack of the battery pack that monitors of discharge monitoring module; The discharge electrode that has reached setting when the performance parameter of certain battery that monitors battery pack stops battery power discharge in limited time;

Discharge monitoring module: the performance parameter of monitoring battery pack.

A kind of lithium battery group equalization discharge control device according to claim 5 is characterized in that:

Described discharge monitoring module is one or more.

Described discharge control module and discharge monitoring module are located in the battery pack.

A kind of lithium battery group charging and discharging equalising control device is characterized in that, comprises above-mentioned lithium battery group charge balancing control device and lithium battery group equalization discharge control device;

Described lithium battery group charge balancing control device is located in battery pack and/or the charger;

Described lithium battery group equalization discharge control device is located in the battery pack.

The shared same charge/discharge control circuit of the charge/discharge control circuit of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device.

The shared charge/discharge control module of the discharge control module of the charge/discharge control circuit of the charge control module of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device; And/or,

The shared charge/discharge monitoring module of the discharge monitoring module of the charge/discharge control circuit of the charging monitoring module of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device.

By above technical scheme a kind of lithium battery group charging and discharging equalising control device described in the utility model as can be known, make charger and perfect combination of lithium battery group control circuit effectively, provide energy by charger for the lithium battery group during charging, by charging monitoring module monitors lithium battery group, when arbitrary lithium battery is full of electricity in the lithium battery group, charge control module is just sent instruction and is given energy conversion module, makes its energy converter that unnecessary electric weight is transferred and guarantees that cell does not overcharge.When the lithium battery group reaches the charging voltage, electric current of setting and temperature, make charger stop the lithium battery group is charged by charge control module control, under the good situation of lithium battery group state, detect the charged state of lithium battery group, and finish the charging overall process by charger.During the discharge of lithium battery group, the discharge monitoring module detects the state of each single lithium battery in real time, and when arbitrary single lithium battery reached discharge voltage, the discharge control module made the lithium battery group stop discharge.

Description of drawings

Fig. 1 is a kind of lithium battery group charge balancing control device structural representation described in the utility model;

Fig. 2 is a kind of lithium battery group equalization discharge control device structural representation described in the utility model;

Fig. 3 is a kind of lithium battery group charging and discharging equalising control device structural representation described in the utility model.

Embodiment

Its core of lithium battery group charging and discharging equalising control device described in the utility model is to increase battery pack charge/discharge equalising control device, the control charger charges to the lithium battery group, the discharge process of control battery pack has been controlled lithium battery group become worse and worse phenomenon of integral status in use effectively.

A kind of lithium battery group charge balancing control device described in the utility model, its embodiment comprises a charging control circuit as shown in Figure 1, is used to control charger battery pack is charged; Charging control circuit comprises charge control module, charging monitoring module and energy conversion module, wherein:

Charge control module: according to the charging monitoring module monitors to the performance parameter control charger and the energy conversion module of battery pack battery pack is charged;

Charging monitoring module: the performance parameter of monitoring battery pack;

Energy conversion module: when the charging monitoring module monitors has reached to the charging limit set to the performance parameter of certain battery, control no longer to this battery charge by charge control module, the excess energy of charger is transferred to energy conversion module, energy conversion module comprises power conversion switch and energy converter, wherein: the power conversion switch: receive the control command of charge control module, open or close energy converter; Energy converter: the excess energy that is used to consume charger.

Above-mentioned charging monitoring module and/or energy conversion module are one or more.Following several situation is arranged usually:

1, each battery in the battery pack is provided with a charging monitoring module and an energy conversion module is controlled separately it;

2, whole battery group only is provided with a charging monitoring module and an energy conversion module, and each battery of unified monitoring whole battery group is realized the wherein control of each battery;

3, whole battery group only is provided with an energy conversion module, and each battery is provided with a charging monitoring module, by unified then by the energy conversion module switching energy to the monitoring of each battery, realizes the wherein control of each battery;

4, each battery of whole battery group is provided with energy conversion module, and only be provided with a charging monitoring module, by the monitoring of unified each battery to whole battery group, by separately energy conversion module switching energy, realize then the wherein control of each battery;

5, can also be that several batteries in the whole battery group are divided into one group and form some groups, each group be provided with a charging monitoring module and an energy conversion module, realizes control.

Charge control module in the above-mentioned charging control circuit, charging monitoring module and energy conversion module can all be located in the battery pack; Also can all be located in the charger; Also can some be located at that another partly is located in the charger in the battery pack.

Present embodiment makes charger and perfect combination of lithium battery group control circuit effectively, provide energy by charger for the lithium battery group during charging, by charging monitoring module monitors lithium battery group, when arbitrary lithium battery is full of electricity in the lithium battery group, charge control module is just sent instruction and is given energy conversion module, makes its energy converter that unnecessary electric weight is transferred and guarantees that cell does not overcharge.When the lithium battery group reaches the charging voltage, electric current of setting and temperature, make charger stop the lithium battery group is charged by charge control module control, under the good situation of lithium battery group state, detect the charged state of lithium battery group, and finish the charging overall process by charger.

A kind of lithium battery group equalization discharge control device described in the utility model, its embodiment be as shown in Figure 2: comprise charge/discharge control circuit, be used for controlling in the course of the work battery power discharge; Described charge/discharge control circuit comprises discharge control module and discharge monitoring module, wherein:

Discharge control module: according to the discharge work to electrical appliance of the performance parameter control battery pack of the battery pack that monitors of discharge monitoring module; When the performance parameter of certain battery that monitors battery pack reached to the discharge electrode of setting in limited time, stop battery power discharge;

Discharge monitoring module: the performance parameter of monitoring battery pack.

Above-mentioned discharge monitoring module is one or more, can a discharge monitoring module be set a battery, also can a discharge monitoring module be set several batteries, can also a discharge monitoring module be set whole battery group.

Discharge control module and discharge monitoring module all are located in the battery pack.

During the discharge of lithium battery group, the discharge monitoring module detects the state of each single lithium battery in real time, and when arbitrary single lithium battery reached discharge voltage, the discharge control module made the lithium battery group stop discharge.

A kind of lithium battery group charging and discharging equalising control device described in the utility model, its embodiment be as shown in Figure 3: above-mentioned lithium battery group charge balancing control device and lithium battery group equalization discharge control device; And described lithium battery group charge balancing control device can be located in battery pack and/or the charger; Described lithium battery group equalization discharge control device is located in the battery pack.The shared same charge/discharge control circuit of charge/discharge control circuit of the charging control circuit of the lithium battery group charge balancing control device described in the practical application and described lithium battery group equalization discharge control device.In concrete circuit is formed:

The shared charge/discharge control module of the discharge control module of the charge/discharge control circuit of the charge control module of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device; And/or,

The shared charge/discharge monitoring module of the discharge monitoring module of the charge/discharge control circuit of the charging monitoring module of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device.

Obviously this execution mode is the execution mode of the best of the present utility model.

The utility model makes charger and perfect combination of lithium battery group control circuit effectively, the lithium battery group is not overcharged or cross to put phenomenon, and guarantee that each single lithium battery uses in the best scope of application, particularly single lithium battery SOC in the lithium battery group 0(low single lithium battery SOC when differing greatly 0=0.01 high single lithium battery SOC 0=1) the lithium battery group still can be carried out safe charge-discharge, can make the SOC of each single lithium battery in the lithium battery group through lithium battery group charge-discharge 0It is minimum that difference becomes, thereby reach the best user mode of lithium battery group, and the cost performance of this device is high.

The charge voltage range of single lithium battery can be set: 3.90~4.50V;

The discharge voltage range of single lithium battery can be set: 1.20~3.50V;

Lithium battery group operating temperature range can be set :-40 ℃~150 ℃;

Discharge voltage in the discharge absolute rating of lithium battery group can be set arbitrarily according to the situation of lithium battery group;

Charging in the charging limit parameter of lithium battery group stops charging and flows with charging voltage and can set arbitrarily according to the situation of lithium battery group.

The above only is preferable embodiment of the utility model and representational embodiment, and described structure also only is representational structure simultaneously; But protection range of the present utility model is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.

Claims (10)

1, a kind of lithium battery group charge balancing control device is characterized in that, comprises the charging control circuit that the control charger charges to battery pack, and charging control circuit comprises charge control module, charging monitoring module and energy conversion module;
The charging monitoring module connects battery pack, charge control module connects charging monitoring module, charger, battery pack and energy conversion module, and according to the charging monitoring module monitors to the performance parameter control charger and the energy conversion module of battery pack battery pack is charged;
When charge control module had reached to the charging limit set in the charging monitoring module monitors to the performance parameter of certain battery of battery pack, the control charger was no longer to this battery charge, and the excess energy of charger is transferred to energy conversion module.
2, lithium battery group charge balancing control device according to claim 1 is characterized in that described energy conversion module comprises power conversion switch and energy converter;
The power conversion switch connects charge control module and receives the charge control module control command, to open the excess energy that energy converter consumes charger; Or close energy converter.
3, lithium battery group charge balancing control device according to claim 1 is characterized in that:
Described charging monitoring module and/or energy conversion module are one or more.
4, lithium battery group charge balancing control device according to claim 1 is characterized in that:
Charge control module in the described charging control circuit, charging monitoring module and/or energy conversion module are located in battery pack and/or the charger.
5, a kind of lithium battery group equalization discharge control device is characterized in that, comprises the charge/discharge control circuit of controlling battery power discharge in the course of the work; Charge/discharge control circuit comprises discharge control module and discharge monitoring module;
The discharge monitoring module connects battery pack, and the discharge control module connects discharge monitoring module and battery pack, and the discharge work to electrical appliance of the performance parameter control battery pack of the battery pack that monitors according to the discharge monitoring module; The discharge electrode that has reached setting when the performance parameter of certain battery that monitors battery pack stops battery power discharge in limited time.
6, lithium battery group equalization discharge control device according to claim 5 is characterized in that:
Described discharge monitoring module is one or more.
7, according to the described a kind of lithium battery group equalization discharge control device of claim 5, it is characterized in that:
Described discharge control module and discharge monitoring module are located in the battery pack.
8, a kind of lithium battery group charging and discharging equalising control device is characterized in that, comprises above-mentioned lithium battery group charge balancing control device and lithium battery group equalization discharge control device;
Described lithium battery group charge balancing control device is located in battery pack and/or the charger;
Described lithium battery group equalization discharge control device is located in the battery pack.
9, according to the described lithium battery group of claim 8 charging and discharging equalising control device, it is characterized in that:
The shared same charge/discharge control circuit of the charge/discharge control circuit of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device.
10, according to the described lithium battery group of claim 9 charging and discharging equalising control device, it is characterized in that:
The shared charge/discharge control module of the discharge control module of the charge/discharge control circuit of the charge control module of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device; And/or,
The shared charge/discharge monitoring module of the discharge monitoring module of the charge/discharge control circuit of the charging monitoring module of the charging control circuit of described lithium battery group charge balancing control device and described lithium battery group equalization discharge control device.
CN 200520128733 2005-12-30 2005-12-30 A charging/discharging balance control device for lithium battery pack CN2886896Y (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101807729A (en) * 2010-03-31 2010-08-18 张家港睿能科技有限公司 Power lithium battery and charging method of balance stage of series-connected group thereof
CN101872991A (en) * 2010-06-28 2010-10-27 惠州市亿能电子有限公司 Balance control method of power battery pack
CN102118039A (en) * 2009-12-30 2011-07-06 易维特科技股份有限公司 Balanced charging system, charging module, charger and charging method of battery pack
CN102122740A (en) * 2011-01-05 2011-07-13 山东申普交通科技有限公司 Intelligent equalization charging method and intelligent equalization charging distributor of storage battery
CN102195303A (en) * 2010-03-12 2011-09-21 上海禾未网络科技有限公司 Distributed multilayer battery management system and method
CN102222941A (en) * 2010-04-13 2011-10-19 登丰微电子股份有限公司 Balancing device for battery voltage and battery charging device
CN101699646B (en) * 2007-04-24 2012-02-08 凹凸电子(武汉)有限公司 Battery cell monitoring and balancing circuit
CN102412616A (en) * 2010-09-26 2012-04-11 苏州益高电动车辆制造有限公司 Battery charging and discharging management device
CN101399386B (en) * 2007-09-25 2012-04-18 南京德朔实业有限公司 Lithium battery pack and charging method thereof
CN101752882B (en) * 2008-11-28 2013-04-10 比亚迪股份有限公司 Equalizer and equalizing charging method
CN102110997B (en) * 2009-12-28 2013-07-10 光宝电子(广州)有限公司 Balance method of battery pack
CN103548233A (en) * 2011-05-23 2014-01-29 日立车辆能源株式会社 Power storage unit control circuit
WO2019042436A1 (en) * 2017-08-31 2019-03-07 比亚迪股份有限公司 Battery balancing system, vehicle, battery balancing method, and storage medium

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101699646B (en) * 2007-04-24 2012-02-08 凹凸电子(武汉)有限公司 Battery cell monitoring and balancing circuit
CN101399386B (en) * 2007-09-25 2012-04-18 南京德朔实业有限公司 Lithium battery pack and charging method thereof
CN101752882B (en) * 2008-11-28 2013-04-10 比亚迪股份有限公司 Equalizer and equalizing charging method
CN102110997B (en) * 2009-12-28 2013-07-10 光宝电子(广州)有限公司 Balance method of battery pack
CN102118039A (en) * 2009-12-30 2011-07-06 易维特科技股份有限公司 Balanced charging system, charging module, charger and charging method of battery pack
CN102195303B (en) * 2010-03-12 2014-01-15 上海禾未网络科技有限公司 Distributed multilayer battery management system and method
CN102195303A (en) * 2010-03-12 2011-09-21 上海禾未网络科技有限公司 Distributed multilayer battery management system and method
CN101807729B (en) * 2010-03-31 2012-11-14 张家港睿能科技有限公司 Power lithium battery and charging method of balance stage of series-connected group thereof
CN101807729A (en) * 2010-03-31 2010-08-18 张家港睿能科技有限公司 Power lithium battery and charging method of balance stage of series-connected group thereof
CN102222941A (en) * 2010-04-13 2011-10-19 登丰微电子股份有限公司 Balancing device for battery voltage and battery charging device
CN102222941B (en) * 2010-04-13 2013-09-18 登丰微电子股份有限公司 Balancing device for battery voltage and battery charging device
CN101872991A (en) * 2010-06-28 2010-10-27 惠州市亿能电子有限公司 Balance control method of power battery pack
CN102412616A (en) * 2010-09-26 2012-04-11 苏州益高电动车辆制造有限公司 Battery charging and discharging management device
CN102122740A (en) * 2011-01-05 2011-07-13 山东申普交通科技有限公司 Intelligent equalization charging method and intelligent equalization charging distributor of storage battery
CN102122740B (en) * 2011-01-05 2013-09-25 山东申普交通科技有限公司 Intelligent equalization charging method and intelligent equalization charging distributor of storage battery
CN103548233A (en) * 2011-05-23 2014-01-29 日立车辆能源株式会社 Power storage unit control circuit
WO2019042436A1 (en) * 2017-08-31 2019-03-07 比亚迪股份有限公司 Battery balancing system, vehicle, battery balancing method, and storage medium

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