CN108039538A - Vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology and method - Google Patents

Vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology and method Download PDF

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Publication number
CN108039538A
CN108039538A CN201711285187.4A CN201711285187A CN108039538A CN 108039538 A CN108039538 A CN 108039538A CN 201711285187 A CN201711285187 A CN 201711285187A CN 108039538 A CN108039538 A CN 108039538A
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Prior art keywords
battery
switch mosfet
battery cell
battery module
inductance
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商云龙
张承慧
崔纳新
张奇
段彬
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Shandong University
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Shandong University
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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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • 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
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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

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

Abstract

The invention discloses a kind of vehicle mounted dynamic battery low temperature to exchange the balanced integration topology of heating and method, including：At adjacent two, a Buck Boost translation circuit is set between battery cell or battery module；The conducting state of two switching tubes in Buck Boost translation circuits is driven by the pwm signal driving of a pair of of state complementation respectively；By setting suitable PWM signal frequency to realize respectively to the battery cell either low-temperature heat of battery module and the voltage automatic equalization to battery cell or battery module.Beneficial effect of the present invention：Only two switch mosfets of need and an inductance achieve that the heating to two neighboring battery cell or battery module.The pwm signal driving switch mosfet of a pair of of state complementation is only needed, without extra voltage, current detection circuit.

Description

Vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology and method
Technical field
The present invention relates to vehicle mounted dynamic battery low-temperature heat technical field, more particularly to a kind of vehicle mounted dynamic battery low temperature Exchange heating-equilibrium integration topology and method.
Background technology
At low ambient temperatures, the charging-discharging performances of lithium-ion-power cell can drastically be deteriorated, and significantly reduce electronic The continual mileage of automobile, can also cause possible permanent damage to battery, reduce the available capacity and service life of battery.Therefore, should Vehicle-mounted lithium-ion-power cell is preheated, battery inner core is reached in the range of normal working temperature.
Battery low-temperature heat be ensure power battery at low ambient temperatures efficiently, the necessary means of safe operation.At present, Many heating means have been proposed in scholar, can be divided into two major classes of external heat and internal heating.It is different according to heat transfer medium, External heat method can be divided into the methods of gas, liquid, phase-change material and electric heating wire again.External heat method has heating Slowly, the uneven, shortcoming such as efficiency is low, volume is big, of high cost, reliability is low.Inside heating method refers in charge and discharge process Directly avoid the conduction of heat long range from heat production inside battery core using the real part of the internal resistance of cell and be diffused into environment.Cause This, inside heating method has fast firing rate, homogeneous heating, efficient, cost is low, high reliability.
Wherein, internal heating has DC heating and exchanges heating means again.Wherein, requirement of the DC heating to battery is severe Carve, it is desirable in the range of certain SOC, and current amplitude cannot excessive and duration cannot be long, otherwise can be born in battery Pole produces Li dendrite, seriously affects battery life, or even cause internal short-circuit of battery.
According to DC charging under low temperature environment with exchange battery electrode reaction mechanism under discharge and recharge.In DC charging process The middle solid phase diffusion welding because of lithium in graphite cathode active material particle reduces, and causes the lithium that electrochemical reaction generates cannot Accumulated in time to particle diffusion inside and in negative active core-shell material particle surface, that is, produce analysis lithium.Alternating current is loaded to battery When, diffusion process of the lithium ion in electrode active material particles alternately, react alternately, will not by embedding and removing Analysis reason is produced, therefore permanent damage will not be caused to the capacity of battery.
Therefore, internal communication heating means tool has great prospects for development, because this method illustrates superior heating property Can, i.e., firing rate is fast, efficient, uniformity is good and to battery not damaged.But the friendship of existing exchange heating means Stream excitation is usually produced by off-board charging/discharging apparatus, has the shortcomings that volume is to exchange heating means to answer greatly and heavy Use the major obstacle on electric automobile.
Up to now, the vehicle-mounted exchange that still neither one is small, efficient, reliability is high, is not required to additional power supply adds Hot device.
The content of the invention
The purpose of the present invention is exactly to solve the above problems, there is provided vehicle mounted dynamic battery low temperature exchange heating-equilibrium one Change topology and method, topological circuit power battery in the case where any external power supply is not required are capable of providing enough energy Measure to realize conducting self-heating, can realize the low-temperature heat to battery at low frequency, can realize at high frequencies to battery list The automatic equalization of bulk voltage, without wanting other equalizing circuit, further increases the power density of battery management system.
To achieve these goals, the present invention adopts the following technical scheme that：
The invention discloses a kind of vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology, including：Adjacent Two between battery cell or battery module set a Buck-Boost translation circuits；Complementary by a pair of of state Pwm signal driving drives the conducting state of two switching tubes in Buck-Boost translation circuits respectively；It is suitable by setting PWM signal frequency is realized to the battery cell either low-temperature heat of battery module and to battery cell or battery mould respectively The voltage automatic equalization of block.
Further, the Buck-Boost translation circuits include：Inductance L1, switch mosfet Q1 and MOSFET are opened Close Q2；
The switch mosfet Q1 and switch mosfet Q2 are connected in series rear and adjacent two battery cells or battery Wired in parallel connects, and described inductance L1 one end is connected to adjacent two between battery cell or battery module, and the other end connects It is connected between switch mosfet Q1 and switch mosfet Q2.
The invention discloses a kind of method of work of vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology, bag Include：
In a PWM cycle, there are four stable operation modes：
Operation mode one：Switch mosfet Q1Conducting, switch mosfet Q2Shut-off；Inductance L1To battery cell or battery Module B1Charging, inductive current iLBegin to decline；
Operation mode two：Switch mosfet Q1It is held on, switch mosfet Q2It is held off；As inductive current iLIt is reduced to When 0, mode two starts；Battery cell or battery module B1Transfer energy to inductance L1In, inductive current reversely rises；
Operation mode three：Switch mosfet Q2Conducting, switch mosfet Q1Shut-off；Energy is from inductance L1It is delivered to battery list Body or battery module B2；
Operation mode four：Switch mosfet Q2It is held on, switch mosfet Q1It is held off.As inductive current iLIt is reduced to When 0, mode four starts；Battery cell or battery module B2Give inductance L1Charging, energy stores are in inductance L1In.
The invention also discloses a kind of vehicle mounted dynamic battery low temperature to exchange heater, including above-mentioned any topology；
And/or
Using above-mentioned any method.
Beneficial effect of the present invention：
(1) it is small, cost is low.Only two switch mosfets and an inductance is needed to achieve that to two neighboring battery The heating of monomer or battery module.
(2) control is simple.Only need the pwm signal of a pair of of state complementation to drive switch mosfet, without extra voltage, Current detection circuit.
(3) being not required to any external power supply or device can just be heated to the battery under low temperature more than zero degree, be easily applied to On electric automobile.
(4) by controlling the switching frequency of switch mosfet, you can on-line tuning firing rate, is suitable for different rings Border temperature and application scenario.
(5) heating to battery pack can be realized at low frequency；It can realize in high frequency to the equal of battery cell or module Weighing apparatus, effectively increases the power density of battery management system.
(6) due to the advantages that small, control is simple, the heater of proposition is easily integrated into battery pack, need not changed On the premise of becoming battery structure or electrolyte, battery pack Effec-tive Function in total temperature and full voltage range can be helped.
(7) the exchange heater proposed is suitable for various power batteries, such as lithium ion, ni-mh or lead-acid power accumulator.
Brief description of the drawings
Fig. 1 exchanges the integrated topological diagram of heating-equilibrium for vehicle mounted dynamic battery low temperature of the present invention；
Fig. 2 (a) is one schematic diagram of operation mode that the present invention is directed to two batteries monomers；
Fig. 2 (b) is two schematic diagram of operation mode that the present invention is directed to two batteries monomers；
Fig. 2 (c) is three schematic diagram of operation mode that the present invention is directed to two batteries monomers；
Fig. 2 (d) is four schematic diagram of operation mode that the present invention is directed to two batteries monomers；
Fig. 3 exchanges the integrated topological theory oscillogram of heating-equilibrium for vehicle mounted dynamic battery low temperature of the present invention；
Fig. 4 (a) is the experimental waveform under switch frequency is 833.3Hz；
Fig. 4 (b) is the experimental waveform under switch frequency is 500Hz；
Fig. 5 (a) is at -20 DEG C of the embodiment of the present invention, in the temperature of two batteries monomers when switching frequency is 833Hz Rise curve；
Fig. 5 (b) is the battery surface temperature point before being heated when switching frequency is 833Hz at -20 DEG C of the embodiment of the present invention Cloth；
Fig. 5 (c) is the battery surface temperature point after being heated when switching frequency is 833Hz at -20 DEG C of the embodiment of the present invention Cloth；
Fig. 6 (a) be the present invention topology under 10kHz to two section ternary batteries electric voltage equalization processes；
Fig. 6 (b) be the present invention topology under 10kHz to two section ternary batteries euqalizing currents；
Fig. 6 (c) be the present invention topology under 10kHz to two section ternary batteries equalization efficiencies.
Embodiment：
The invention will be further described below in conjunction with the accompanying drawings.
The invention discloses a kind of vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology, as shown in Figure 1, bag Include：At adjacent two, a Buck-Boost translation circuit is set between battery cell or battery module；Except battery plus Heat, the topological structure can also obtain the automatic equalization of battery cell or intermodule.
On the one hand, since the power grade of device is remarkably decreased, the volume and cost of each device will be decreased obviously. On the other hand, which can obtain the equilibrium to battery cell or intermodule at the same time at high frequencies, so as to eliminate extra Equalizing circuit, improve the power density of system.In fact, these features cause this method to be easier integrated and application.
In order to simplify to operational modal analysis, with two batteries monomer B1And B2Exemplified by basic heating topology is divided Analysis.Battery cell can be equivalent to a voltage source VOCWith an ohmic internal resistance RBSeries circuit, its terminal voltage are denoted as VB.Carry The heater gone out is controlled by the pwm signal of a pair of of state complementation, i.e. and PWM+ and PWM-, in one cycle with four stabilizations Operation mode.This four operation modes alternately switch, and an alternating current can be automatically generated between two battery cells.Fig. 2 (a)-(d) and Fig. 3 sets forth the operation principle and theoretical waveform of the topological structure of proposition.
Assuming that each battery cell has identical terminal voltage and ohmic internal resistance, i.e.,
VB=VB1=VB2, (0.1)
RB=RB1=RB2. (0.2)
In formula：VB1And VB2Respectively battery cell B1And B2Terminal voltage.RB1And RB2Respectively battery cell B1And B2Ohm Internal resistance.MOSFET has identical ON resistance, i.e.,
RDS(on)=RDS(on),Q1=RDS(on),Q2. (0.3)
In formula：RDS(on),Q1And RDS(on),Q2Respectively switch mosfet Q1And Q2ON resistance.Fig. 2 equivalent resistances R1For electricity Feel L1The sum of with the equivalent resistance of a switch mosfet, it is represented by
R1=RL1+RDS(on), (0.4)
In formula：RL1For inductance L1Equivalent resistance.
One [t of operation mode0-t1, Fig. 2 (a)]：In t0Moment, Q1Conducting, Q2Shut-off.Inductance L1Give battery cell B1Fill Electricity, inductive current iLBegin to decline.Based on Kirchhoff's current law (KCL) (KCL), inductive current iLIt can be derived as
In formula：VB1For battery cell B1Voltage.
In t1Moment, inductive current iLIt is reduced to 0.By solving (0.5), the duration t of mode one1-t0It can be calculated as
Based on formula (0.5) and (0.6), battery cell B1Internal resistance the energy of consumption can approximate representation during mode one For
Similarly, equivalent resistance R1During mode one energy of consumption can approximate representation be
In t0At the moment, be stored in inductance L1In ceiling capacity can be expressed as
Two [t of operation mode1-t2, Fig. 2 (b)]：Q1It is held on, Q2It is held off.As inductive current iLIn t1When being reduced to 0, Mode two starts.Battery cell B1Transfer energy to inductance L1In, inductive current reversely rises.During the mode, inductance Electric current iLIt is represented by
Similar operation mode one, battery cell B1Internal resistance RB1The energy consumed can approximate representation be
Equivalent resistance R1The energy that mode two is consumed can approximate representation be
Therefore, based on formula (0.7) and (0.11), it is contemplated that R1It is smaller, the B in a switch periods1Ohmic internal resistance RB1 The gross energy consumed can approximation be expressed as
As can be seen from the above equation, B1Firing rate be proportional to the amplitude i of alternating currentL(t0) and iL(t2) and ohm Internal resistance RB1。
In t2At the moment, be stored in inductance L1In ceiling capacity can be expressed as
Three [t of operation mode2-t3, Fig. 2 (c)]：In t2Moment, Q2Conducting, Q1Shut-off.Such as Fig. 2 (c), inductance L1With battery Monomer B2Parallel connection, energy is from L1It is delivered to B2.Inductive current iLRise, be represented by
In operation mode three, battery cell B2Ohmic internal resistance RB2And R1The energy consumed approximation can be expressed as respectively
Four [t of operation mode3-t4, Fig. 2 (d)]：Q2It is held on, Q1It is held off.As inductive current iLIn t3When being reduced to 0, Mode four starts.As shown in Fig. 2 (d), battery cell B2Give inductance L1Charging, energy stores are in inductance L1In.Based on KCL, electricity Inducing current iLIt can be expressed as
In operation mode four, battery cell B2Ohmic internal resistance RB2And R1The energy consumed approximation can be expressed as respectively
According to formula (0.16) and (0.19), in a switch periods, B2Ohmic internal resistance RB2The gross energy consumed can Approximate representation is
Similarly, B2Firing rate be proportional to the amplitude i of alternating currentL(t2) and iL(t4) and ohmic internal resistance RB2。
In t4At the moment, be stored in inductance L1In ceiling capacity be represented by
As seen from the above analysis, mode one and mode two are obtained to battery cell B1Exchange discharge and recharge.Mode Three and mode four obtain to battery cell B2Exchange discharge and recharge.Also, during mode two and mode three, energy is from electricity Pond monomer B1It is delivered to B2.During mode four and mode one, energy is from battery cell B2It is delivered to B1.Thus it is ensured that two The balance of a battery cell energy.
In view of VB1=VB2, in order to obtain the balance under stable state between two battery cells, duty cycle should be arranged to D =50%.
The transfer efficiency of One Buck-Boost converter body can be by calculating the output energy of a certain battery cell in a cycle It is calculated with input energy.Therefore, based on (0.8), (0.9), (0.12) and (0.14) and considers R1It is smaller, B1Turn Change efficiency can approximate calculation be
In formula：PSlossFor switching loss, can be calculated by the manual testing of MOSFET.Similarly, we can obtain B2Transfer efficiency.T is switch periods.According to (0.23), it can be seen that transfer efficiency and equivalent resistance R1, alternating current amplitude It is related with switching loss.R1Smaller, transfer efficiency is higher.Therefore, the devices such as MOSFET, the inductance of low equivalent resistance should be selected To improve the transfer efficiency of heater.At low frequency, switching loss is smaller, but ohmic loss is larger.In view of iL(t0)≈|iL (t2) |, (0.23) can be further simplified as
It can be seen that switching frequency is lower, alternating current amplitude is bigger, and transfer efficiency is lower.In high frequency, although ohm Loss is smaller, but switching loss is larger, also results in relatively low transfer efficiency.This shows that there are an optimal switch frequency Rate causes transfer efficiency highest.
B1And B2The efficiency of heating surface can by calculate battery heating consumption energy and converter consume energy obtain, It can be expressed as respectively
From formula (0.25) as can be seen that internal resistance of cell RBIt is bigger, equivalent resistance R1Smaller, the efficiency of heating surface is higher, meaning More energy to heat for battery.
Balanced purpose is that energy is delivered to the relatively low battery cell of voltage from voltage higher battery cell.Therefore, Equalization efficiency can be expressed as
In formula：PNlossTo work as VB1=VB2Inherent loss during without equilibrium.As can be seen that when equal power is larger, PNlossIt can be ignored, formula (0.26) can simplify
In this case, equalization efficiency is inversely proportional to the voltage difference between two battery cells.When equal power is smaller, Inherent loss PNlossOccupy larger proportion, cause relatively low equalization efficiency.Therefore, equalization efficiency can be with the increasing of equal power Add first to rise and decline afterwards.
Experimental result and analysis
Establish the experimental prototype of two batteries monomers.Experimental subjects is respectively the ternary battery and 1100- of 2500-mAh The ferric phosphate lithium cell of mAh.Switch Q1-Q2 uses STP220N6F7MOSFET respectively, its ON resistance is 2.4m Ω.Inductance About 102.8 μ H, its equivalent resistance are about 23m Ω.
Fig. 4 (a) and Fig. 4 (b) sets forth the basic heating topology in the case where switching frequency is 833.3Hz and 500Hz Experimental waveform.As can be seen that due under low temperature the internal resistance of cell it is larger, exchange heated current be not standard triangular wave.Such as figure Shown in 4 (a), under the switching frequency of 833.3Hz, the amplitude that exchanges heated current is 7.8A, i.e. 3.1C, virtual value 4.7A, That is 1.9C.As shown in Fig. 4 (b), when switching frequency is reduced to 500Hz, exchanging the amplitude of heated current increases to 10.4A, i.e., 4.2C, virtual value 6.7A, i.e. 2.7C.The result shows that on-line control exchange heated current is capable of by controlling switch frequency Amplitude, and then adjust firing rate.In theory, switching frequency is lower, and alternating current amplitude is bigger, and firing rate is faster.
In order to verify the validity of the topological structure of proposition, Fig. 5 (a)-Fig. 5 (c) gives two sections three at p- 20 DEG C The heating result of first battery.Switching frequency is arranged to 833Hz, and alternating current amplitude is 7.8A, i.e. 3.1 C.As shown in Fig. 5 (a), Battery cell was just heated to 0 DEG C from -20 DEG C in 13 minutes.Average heating rate is 1.54 DEG C/min, is consumed about 7.1% energy content of battery.As shown in Fig. 5 (b) and Fig. 5 (c), heating latter two battery cell surface has almost consistent temperature Distribution, the maximum temperature difference of two battery cells only have 0.3 DEG C, and the topological structure for showing to propose is consistent with preferably heating Property.
Fig. 6 (a)-Fig. 6 (c) gives the heating-equilibrium integration topology proposed under 10kHz to two section ternary batteries Equilibrium result.Such as Fig. 6 a) shown in, the initial maximum voltage difference between two batteries monomers is 452mV.After 3500s, battery Monomer voltage almost obtains equilibrium, its voltage difference is 18mV.Fig. 6 (b) gives the euqalizing current in balancing procedure, its value with Voltage difference is directly proportional.Fig. 6 (c) gives the relation between equalization efficiency and equal power.As can be seen that theoretical equalization efficiency It is basically identical with the equalization efficiency of measurement.When equal power increases to 1.36W from 0.10W, the equalization efficiency of measurement from 55.2% increases to 89.6%.When equal power continues to increase to 2.86W from 1.36W, the equalization efficiency of measurement is from 89.6% It is reduced to 86.4%.These are the result shows that the heating proposed-equilibrium integration topology can be realized to battery cell in high frequency Automatic equalization.
Although above-mentioned be described the embodiment of the present invention with reference to attached drawing, not the present invention is protected The limitation of scope, those skilled in the art should understand that, on the basis of technical scheme, people in the art Member need not make the creative labor the various modifications that can be made or deformation still within protection scope of the present invention.

Claims (4)

  1. A kind of 1. vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology, it is characterised in that including：Adjacent two One Buck-Boost translation circuit is set between a battery cell or battery module；Believed by the PWM of a pair of of state complementation Number driving respectively drive Buck-Boost translation circuits in two switching tubes conducting state；By setting suitable pwm signal Frequency is realized to the battery cell either low-temperature heat of battery module and the voltage to battery cell or battery module respectively Automatic equalization.
  2. 2. a kind of vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology as claimed in claim 1, its feature exist In the Buck-Boost translation circuits include：Inductance L1, switch mosfet Q1 and switch mosfet Q2；
    The switch mosfet Q1 and switch mosfet Q2 are connected in series rear and adjacent two battery cells or battery module It is connected in parallel, described inductance L1 one end is connected to adjacent two between battery cell or battery module, and the other end is connected to Between switch mosfet Q1 and switch mosfet Q2.
  3. 3. a kind of method of work of vehicle mounted dynamic battery low temperature exchange heating as claimed in claim 2-equilibrium integration topology, It is characterised in that it includes：
    In a PWM cycle, there are four stable operation modes：
    Operation mode one：Switch mosfet Q1Conducting, switch mosfet Q2Shut-off；Inductance L1To battery cell or battery module B1 Charging, inductive current iLBegin to decline；
    Operation mode two：Switch mosfet Q1It is held on, switch mosfet Q2It is held off；As inductive current iLWhen being reduced to 0, Mode two starts；Battery cell or battery module B1Transfer energy to inductance L1In, inductive current reversely rises；
    Operation mode three：Switch mosfet Q2Conducting, switch mosfet Q1Shut-off；Energy is from inductance L1Be delivered to battery cell or Person's battery module B2；
    Operation mode four：Switch mosfet Q2It is held on, switch mosfet Q1It is held off.As inductive current iLWhen being reduced to 0, Mode four starts；Battery cell or battery module B2Give inductance L1Charging, energy stores are in inductance L1In.
  4. 4. a kind of vehicle mounted dynamic battery low temperature exchanges heater, it is characterised in that any described in including claim 1-2 opens up Flutter；
    And/or
    Using any method described in claim 3.
CN201711285187.4A 2017-12-07 2017-12-07 Vehicle mounted dynamic battery low temperature exchange heating-equilibrium integration topology and method Pending CN108039538A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN112186305A (en) * 2020-09-29 2021-01-05 西安交通大学 Low-temperature battery hybrid self-heating device and self-heating method based on same
CN112994142A (en) * 2021-01-25 2021-06-18 山东大学 Battery equalization-alternating current heating integrated topology and control method
CN116722237A (en) * 2023-06-09 2023-09-08 武汉理工大学 Low-temperature preheating circuit structure of power battery and control method

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CN104249629A (en) * 2013-06-28 2014-12-31 比亚迪股份有限公司 Electric vehicle, power system of the same, and charging method of said power system

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112186305A (en) * 2020-09-29 2021-01-05 西安交通大学 Low-temperature battery hybrid self-heating device and self-heating method based on same
CN112994142A (en) * 2021-01-25 2021-06-18 山东大学 Battery equalization-alternating current heating integrated topology and control method
CN112994142B (en) * 2021-01-25 2023-09-01 山东大学 Battery equalization-alternating current heating integrated topology and control method
CN116722237A (en) * 2023-06-09 2023-09-08 武汉理工大学 Low-temperature preheating circuit structure of power battery and control method
CN116722237B (en) * 2023-06-09 2024-06-04 武汉理工大学 Low-temperature preheating circuit structure of power battery and control method

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