CN206004357U - A kind of electrokinetic cell equalizing circuit and equalizing charge system - Google Patents

A kind of electrokinetic cell equalizing circuit and equalizing charge system Download PDF

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Publication number
CN206004357U
CN206004357U CN201621048799.2U CN201621048799U CN206004357U CN 206004357 U CN206004357 U CN 206004357U CN 201621048799 U CN201621048799 U CN 201621048799U CN 206004357 U CN206004357 U CN 206004357U
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China
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circuit
electrokinetic cell
control chip
main control
double tube
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Expired - Fee Related
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CN201621048799.2U
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Chinese (zh)
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周映虹
廖胜峰
黄育江
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Guangdong University of Technology
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Guangdong University of Technology
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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; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

A kind of electrokinetic cell equalizing circuit; including EMI filter circuit, double tube positive exciting circuit, drive circuit, protection circuit, main control chip, interface circuit, sample circuit and auxiliary power circuit, double tube positive exciting circuit is used for the electricity of cell in balanced battery pack to be charged;Drive circuit controls the switching tube break-make of double tube positive exciting circuit and the charging rate of double tube positive exciting circuit by main control chip by pwm signal;Sample circuit is sampled to the output end voltage of double tube positive exciting circuit, electric current, and sampling data transmitting is given main control chip is processed;Interface circuit is used for realizing the data interaction between external circuit and main control chip.The electrokinetic cell equalizing circuit can be realized efficiently balanced by the electricity transfer between cell, the energy loss in balancing procedure can effectively be reduced, efficiency is higher, while reducing the difficulty of electrokinetic cell heat management, the service life of battery pack is extended, stability, security are stronger.

Description

A kind of electrokinetic cell equalizing circuit and equalizing charge system
Technical field
The utility model is related to electric motor car charge control technical field, more particularly to a kind of electrokinetic cell equalizing circuit and Equalizing charge system.
Background technology
Compared with orthodox car, electric automobile has the double dominant of energy-saving and environmental protection.Electrokinetic cell is used as electric automobile Core, the problems such as its performance is directly connected to distance travelled, service life, economy and the dynamic property of electric automobile.? In practical application, the voltage of cell is less, and in order to meet needs, the mode frequently with cell series connection is improving battery The output voltage of group, due to the reasons such as manufacturing process, the capacity of each cell, voltage, internal resistance and aging speed etc., makes With during inevitably result from inconsistent, so as to cause the unbalanced of battery pack.Although in the production process of battery Ensure that cell is consistent in manufacturing process as far as possible, the cell for constituting battery pack also goes through strict screening combo, but It is between cell, to yet suffer from certain difference, with the growth of use time, this species diversity can be increasing, battery The lack of uniformity of group can be increasingly severe.
During the use of battery pack, the electric current for flowing through each cell is identical, due to cell it Between having differences property, during charging, if whether being full of as basis for estimation using the big cell of capacity, the little cell of capacity Can be first filled with and overcharge, cell occurs the problems such as percentage of water loss is big, pole board oxidation, temperature are raised rapidly;If with capacity Whether little cell is full of as basis for estimation, then the big cell of capacity will full of and charge less, monomer electricity The catalytic activity in pond reduces, hydraulic performance decline, so as to cause battery pack unbalanced.Also, the cell that connects in battery pack Number is more, and discharge and recharge number of times is more, and lack of uniformity is more serious.In the course of time, the service life of whole battery pack contracts significantly Short, increased the use cost of electric automobile.
Brought to solve the problems, such as that battery pack is unbalanced, extend the service life of battery pack, various fill with equilibrium The battery management system of Electricity Functional arises at the historic moment.Equalizaing charge is referred to, in battery pack charging process, using certain controlling party Method, makes each cell and the electricity in battery pack reach unanimously, keeps in balance.The equalizaing charge system of current electrokinetic cell System is a lot, is mainly controlled by way of bypass resistance carries out energy dissipation, and this dissipative type control circuit is in equilibrium During charge control, energy loss is larger, and balanced required time is longer, and the difficulty of electrokinetic cell heat management is larger.
Therefore, for existing problems of the prior art, need that a kind of energy loss of offer is little, balanced required time is short badly, Electrokinetic cell can be realized efficiently controls administrative skill to be particularly important in a balanced way.
Utility model content
The purpose of this utility model is to avoid weak point of the prior art and provide a kind of electrokinetic cell balanced electricity Road and equalizing charge system.The electrokinetic cell equalizing circuit can realize efficiently equilibrium by the electricity transfer between cell, The energy loss in balancing procedure can effectively be reduced, efficiency is higher, while the difficulty of electrokinetic cell heat management is reduced, extend The service life of battery pack, stability, security be stronger.
The purpose of this utility model is achieved through the following technical solutions:
A kind of electrokinetic cell equalizing circuit and equalizing charge system are provided.
A kind of electrokinetic cell equalizing circuit, including EMI filter circuit, double tube positive exciting circuit, drive circuit, protection circuit, Main control chip, interface circuit, sample circuit and auxiliary power circuit,
The EMI filter circuit is connected with double tube positive exciting circuit, and the double tube positive exciting circuit is used for balanced electricity to be charged The electricity of cell in the group of pond;
The main control chip is connected with drive circuit, sample circuit, interface circuit, accessory power supply respectively;
The drive circuit by main control chip by pwm signal control double tube positive exciting circuit switching tube break-make and two-tube just The charging rate of excitation circuit;
The sample circuit is sampled to the output end voltage of double tube positive exciting circuit, electric current, and by sampling data transmitting Processed to main control chip;
The interface circuit is used for realizing the data interaction between external circuit and main control chip;
The auxiliary power circuit is used for just providing each for main control chip, drive circuit, sample circuit and interface circuit Operating voltage needed for often working.
Wherein, also include the protection circuit being connected respectively with double tube positive exciting circuit, main control chip, the protection circuit is used for The abnormal conditions that protection double tube positive exciting circuit occurs in charging process.
Further, the auxiliary power circuit is main control chip, drive circuit, sample circuit, is connect by voltage stabilizing chip Mouth circuit is powered.
Wherein, the interface circuit realizes data interaction by CAN, SCI bus and outside battery management system.
Wherein, the interface circuit is connected with outside display device and/or warning device by spi bus.
Wherein, the main control chip is dsp chip TMS320F28035.
A kind of electrokinetic cell equalizing charge system, balanced with the electrokinetic cell including multiple electrokinetic cell equalizing circuits The one-to-one battery pack of circuit, also includes to be charged, to multiple battery pack, the battery management system for managing;The cell tube Battery status in reason each battery pack of system monitoring;The electrokinetic cell equalizing system is monitored not to battery management system Balancing battery group carries out energy transfer, realizes the equilibrium between each cell.
The beneficial effects of the utility model are:
Electrokinetic cell equalizing circuit of the present utility model is mainly in battery pack charging process, and cell is carried out all Weighing apparatus control;Sample circuit is sampled to cell, and sends the data to main control chip, and main control chip is according to monitoring data The output of control double tube positive exciting circuit, adjusts charging process, so that the dump energy of each battery pack reaches unanimously.In the power In battery equalizing circuit, between each several part circuit, be fitted close mutually work, final realize to electrokinetic cell quick, balanced, Safe charging, and the electric energy loss of charging device is reduced, improve the stability of circuit.
Electrokinetic cell equalizing charge system of the present utility model be electrokinetic cell equalizing circuit, battery management system while It is applied in the charging process of power battery pack, battery management system is to the voltage of cell, electric current, temperature and battery pack Total voltage, total current carry out monitor in real time, electrokinetic cell equalizing circuit according to monitoring data point reuse charging process speed, So that the dump energy of each cell and each battery pack reaches unanimously, while battery is occurred in charging process Overvoltage, excessively stream, excess temperature etc. implement protection extremely, realize quick, the balanced, safe charging to electrokinetic cell.
Description of the drawings
The utility model is described further using accompanying drawing, but the content in accompanying drawing is not constituted to of the present utility model What limits.
Fig. 1 is the theory diagram of electrokinetic cell equalizing circuit of the present utility model.
Fig. 2 is the circuit theory diagrams of double tube positive exciting circuit.
Fig. 3 is the theory diagram of electrokinetic cell equalizing charge system of the present utility model.
Specific embodiment
In order that the purpose of utility model, technical scheme and advantage become more apparent, below in conjunction with drawings and Examples, The utility model is further elaborated.
Embodiment
A kind of electrokinetic cell equalizing circuit of the present utility model, as shown in Figure 1 to Figure 2, including EMI filter circuit, two-tube Forward converter, drive circuit, protection circuit, main control chip, interface circuit, sample circuit and auxiliary power circuit.EMI filtered electrical Road is connected with double tube positive exciting circuit, EMI filter circuit, for improving the antijamming capability of electrokinetic cell equalizing circuit, two-tube just Excitation circuit is used for the electricity of cell in balanced battery pack to be charged;Main control chip respectively with drive circuit, sample circuit, Interface circuit, accessory power supply connection;Drive circuit controls the switching tube of double tube positive exciting circuit to lead to by main control chip by pwm signal The charging rate of disconnected and double tube positive exciting circuit;Sample circuit is sampled to the output end voltage of double tube positive exciting circuit, electric current, and Sampling data transmitting is given main control chip processed;Interface circuit is used for realizing the data between external circuit and main control chip Interaction;Auxiliary power circuit is used for providing respective normal work institute for main control chip, drive circuit, sample circuit and interface circuit The operating voltage for needing.
Electrokinetic cell equalizing circuit is mainly in battery pack charging process, carries out Balance route to cell;Sampling Circuit is sampled to cell, and sends the data to main control chip, and main control chip is two-tube just according to monitoring data control The output of excitation circuit, adjusts charging process, so that the dump energy of each battery pack reaches unanimously.In the balanced electricity of the electrokinetic cell Lu Zhong, is fitted close work between each several part circuit mutually, finally realizes quick, the balanced, safe charging to electrokinetic cell, and And the electric energy loss of charging device is reduced, improve the stability of circuit.
Wherein, also include the protection circuit being connected respectively with double tube positive exciting circuit, main control chip, protection circuit is used for protecting The abnormal conditions that double tube positive exciting circuit occurs in charging process.The mistake that protection circuit is likely to occur in charging process to battery The abnormal conditions such as pressure, excessively stream, excess temperature implementing circuit is protected, it is ensured that circuit safety reliability service.
Further, auxiliary power circuit passes through voltage stabilizing chip for main control chip, drive circuit, sample circuit, interface electricity Road powers.Ensure the normal work of each circuit, and each circuit is independently-powered, is independent of each other.
Wherein, interface circuit realizes data interaction by CAN, SCI bus and outside battery management system, in real time Understand the state of each battery pack equalizaing charge to be carried out to battery pack.
Wherein, interface circuit is connected with outside display device and/or warning device by spi bus.User mutual master Liquid crystal display to be included and alarming device, display are used for the data such as display charging voltage, electric current in real time, facilitate user to understand Understand the charge condition of electric automobile, alarming device can be to provide prompting or the alarm signal of the modes such as voice, light.
Wherein, main control chip is dsp chip TMS320F28035.Other processors such as contrast STC51 and STM32, have The features such as processing speed is fast, stability is high, expansibility is good, energy real-time processing data, and low price, cost performance are high.
Double tube positive exciting circuit theory diagrams as shown in Fig. 2 the circuit topology be two-transistor forward converter, 220V exchange input, Diode D1, D2, D3, D4 constitute rectifier bridge, and C1 is input filter capacitor, and Q1, Q2 are switching tube, and D5, D6 are fly-wheel diode, D7 is commutation diode, and D8 is fly-wheel diode, and L1 is output inductor, and C2 is output filter capacitor, and RL represents load.Double Pipe forward converter is one of circuit topology commonly used in the industry at present, and it overcomes single tube forward converter breaker in middle The high shortcoming of tube voltage stress, also occurs without leakage inductance spike during shutoff.In addition, with half-bridge converter or full-bridge converter phase Than its each brachium pontis is composed in series by a diode, a switching tube, structurally there is no bridge arm direct pass Problem, the therefore simple structure of circuit, reliability are high.
A kind of electrokinetic cell equalizing charge system of the present utility model, as shown in figure 3, including the balanced electricity of multiple electrokinetic cells Road and the one-to-one battery pack of electrokinetic cell equalizing circuit, also include to be charged, to multiple battery pack, the cell tube for managing Reason system;Battery management system monitors the battery status in each battery pack;Electrokinetic cell equalizing system is to battery management system The unbalanced battery pack for monitoring carries out energy transfer, realizes the equilibrium between each cell.Battery pack 1, battery pack in Fig. 3 2nd ..., battery pack N is composed in series by the cell of certain amount, and each battery pack corresponds to the balanced electricity of electrokinetic cell respectively Road 1, electrokinetic cell equalizing circuit 2 ..., electrokinetic cell equalizing circuit N, each electrokinetic cell equalizing circuit is only corresponding electricity Pond group is individually charged, and is independent of each other between each battery pack, and each battery pack can be with battery management system(BMS)Carry out Real-time Communication for Power, so as to ensure being smoothed out for battery pack balancing charging.
As battery management system is responsible for each battery pack of monitor in real time, it is easy to understand each battery pack and its internal series-connection Cell particular state, during being charged to electric automobile power battery, first determine whether each battery pack The charge condition of internal cell, if being unsatisfactory for equalization request, needs to realize cell in battery pack by energy transfer Between equilibrium, when in the group for realizing all battery pack equilibrium after, whole battery pack is carried out using electric automobile battery charger High-power charging, stops when having any one battery pack to reach setting value in all battery pack, then using electrokinetic cell Equalizing circuit carries out small-power charging to battery pack respectively, in charging process, electrokinetic cell equalizing circuit by with cell tube The real-time Communication for Power of reason system understands the charge condition of each battery pack, full of stopping, the Homogeneity between groups charging complete of battery pack, Quick, equalizaing charge to electric automobile power battery is finally realized.
Finally it should be noted that above example is merely to illustrate the technical solution of the utility model rather than to this practicality The restriction of novel protected scope, although being explained in detail to the utility model with reference to preferred embodiment, the common skill of this area Art personnel should be appreciated that and the technical solution of the utility model can be modified or equivalent, without deviating from this practicality The spirit and scope of new technique scheme.

Claims (7)

1. a kind of electrokinetic cell equalizing circuit, it is characterised in that:Including EMI filter circuit, double tube positive exciting circuit, drive circuit, Protection circuit, main control chip, interface circuit, sample circuit and auxiliary power circuit,
The EMI filter circuit is connected with double tube positive exciting circuit, and the double tube positive exciting circuit is used for balanced battery pack to be charged The electricity of interior cell;
The main control chip is connected with drive circuit, sample circuit, interface circuit, accessory power supply respectively;
The drive circuit is controlled switching tube break-make and the double tube positive exciting electricity of double tube positive exciting circuit by main control chip by pwm signal The charging rate on road;
The sample circuit is sampled, and sampling data transmitting is given master to the output end voltage of double tube positive exciting circuit, electric current Control chip is processed;
The interface circuit is used for realizing the data interaction between external circuit and main control chip;
The auxiliary power circuit is used for providing each normal work for main control chip, drive circuit, sample circuit and interface circuit Operating voltage needed for making.
2. a kind of electrokinetic cell equalizing circuit according to claim 1, it is characterised in that:Also include respectively with double tube positive exciting Circuit, the protection circuit of main control chip connection, the protection circuit are used for protecting double tube positive exciting circuit to occur in charging process Abnormal conditions.
3. a kind of electrokinetic cell equalizing circuit according to claim 2, it is characterised in that:The auxiliary power circuit passes through Voltage stabilizing chip is main control chip, drive circuit, sample circuit, interface circuit are powered.
4. a kind of electrokinetic cell equalizing circuit according to claim 1, it is characterised in that:The interface circuit passes through CAN Bus, SCI bus realize data interaction with outside battery management system.
5. a kind of electrokinetic cell equalizing circuit according to claim 4, it is characterised in that:The interface circuit passes through SPI Bus is connected with outside display device and/or warning device.
6. a kind of electrokinetic cell equalizing circuit according to claim 1, it is characterised in that:The main control chip is DSP core Piece TMS320F28035.
7. a kind of electrokinetic cell equalizing charge system, it is characterised in that:Including multiple as described in any one of claim 1 to 6 Electrokinetic cell equalizing circuit and the one-to-one battery pack of the electrokinetic cell equalizing circuit, also include to enter multiple battery pack The battery management system of row Charge Management;The battery management system monitors the battery status in each battery pack;The power The unbalanced battery pack that battery equalization system is monitored to battery management system carries out energy transfer, realizes between each cell Balanced.
CN201621048799.2U 2016-09-12 2016-09-12 A kind of electrokinetic cell equalizing circuit and equalizing charge system Expired - Fee Related CN206004357U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106684814A (en) * 2017-03-23 2017-05-17 广州市爱浦电子科技有限公司 High-precision normal-shock switch power output overvoltage protection circuit
CN107458864A (en) * 2017-09-20 2017-12-12 广东工业大学 Transformer silicon steel sheet laminating equipment and its feed arrangement
CN109860738A (en) * 2019-02-12 2019-06-07 上海交通大学 The graphene-based lithium-ion battery systems of fast charging and discharging
CN113346567A (en) * 2021-03-22 2021-09-03 上海空间电源研究所 Lithium ion storage battery monomer active equalization circuit for carrying

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106684814A (en) * 2017-03-23 2017-05-17 广州市爱浦电子科技有限公司 High-precision normal-shock switch power output overvoltage protection circuit
CN107458864A (en) * 2017-09-20 2017-12-12 广东工业大学 Transformer silicon steel sheet laminating equipment and its feed arrangement
CN107458864B (en) * 2017-09-20 2023-07-25 广东工业大学 Transformer silicon steel sheet lamination equipment and feed arrangement thereof
CN109860738A (en) * 2019-02-12 2019-06-07 上海交通大学 The graphene-based lithium-ion battery systems of fast charging and discharging
CN113346567A (en) * 2021-03-22 2021-09-03 上海空间电源研究所 Lithium ion storage battery monomer active equalization circuit for carrying
CN113346567B (en) * 2021-03-22 2022-10-28 上海空间电源研究所 Lithium ion storage battery monomer active equalization circuit for carrying

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20170308

Termination date: 20180912