CN107134821A

CN107134821A - Electric automobile and its low tension battery power management system

Info

Publication number: CN107134821A
Application number: CN201710254115.7A
Authority: CN
Inventors: 崔挺
Original assignee: NIO Co Ltd
Current assignee: NIO Co Ltd
Priority date: 2017-04-18
Filing date: 2017-04-18
Publication date: 2017-09-05
Anticipated expiration: 2037-04-18
Also published as: WO2018192314A1; CN107134821B

Abstract

The present invention relates to electric automobile and its low tension battery power management system, the system includes battery status parameter acquisition module and analysis and Control module；Battery status parameter acquisition module is configured to obtain the status information of low pressure electric power storage；Analysis and Control module is configured to the status information according to acquired low pressure electric power storage, analyzes and export the charge parameter of low tension battery；The electric automobile includes the low tension battery power management system.Compared with prior art, the electric automobile and its low tension battery power management system that the present invention is provided can adaptively adjust the charging voltage and/or charging modes of low tension battery charging according to the status information of low tension battery.

Description

Electric automobile and its low tension battery power management system

Technical field

The present invention relates to electric automobile whole control technology field, and in particular to electric automobile and its low tension battery electricity Management system.

Background technology

Lead-acid battery is the power supply of electric automobile low-pressure system, can be entered by electrokinetic cell by DC/DC modular converters Row charging.At present, only under electric automobile during traveling state, i.e., when electric automobile inner high voltage relay is closed, DC/DC moduluss of conversion The high-tension current that electrokinetic cell is exported can be just converted to low-tension current and exported to lead-acid battery by block to be charged.Meanwhile, it is whole Vehicle controller generally exports the charging strategy of fixed charging voltage using control DC/DC modular converters to lead-acid battery, it is impossible to root Exported according to actual condition automatic adjusument to the charging voltage of lead-acid battery, easily cause lead-acid battery to overcharge, charge less and Situation about excessively using, the service life of serious infringement lead-acid battery.

DC/DC modular converters can continue to power to low-pressure system after the electric power system of electric automobile starts, DC/DC conversions Module and lead-acid battery can have a strong impact on the normal of electric automobile low-voltage load and use after breaking down.Therefore, DC/DC moduluss of conversion When block and lead-acid battery are in abnormality, if the fault type of abnormality can not be diagnosed in time, it will influence electric automobile It is normal using even the personal safety of electric automobile human pilot can be influenceed.

The content of the invention

In order to solve above mentioned problem of the prior art, as understanding must not be adaptive according to the actual condition of electric automobile The charging voltage of low tension battery should be adjusted, and the fault type of power transfer module and low tension battery can not be diagnosed in time Technical problem, the invention provides a kind of low tension battery power management system of electric automobile, can automatic adjusument it is low Press the charging voltage of battery, and the fault type of diagnosis power transfer module and low tension battery in time.

In a first aspect, in the present invention a kind of low tension battery power management system method of electric automobile technical scheme It is：

The system includes battery status parameter acquisition module and analysis and Control module；

The battery status parameter acquisition module, is configured to obtain the status information of low tension battery；

The analysis and Control module, is configured to the status information according to acquired low tension battery, analyzes and exports low Press the charge parameter of battery.

Further, an optimal technical scheme providing of the present invention is：

The status information of the low tension battery includes state-of-charge；

The analysis of the charge parameter of the analysis and Control module mesolow battery includes the state-of-charge of low tension battery Analytical procedure, including

If SOC_l≤SOC_h≤SOC_u, then the charging voltage of low tension battery charging is default first charging voltage；It is described pre- If the first charging voltage is set according to the temperature and charging curve of low tension battery；

If SOC_h>SOC_u, then the charging voltage of low tension battery charging is default second charging voltage；Described default second The deviation of charging voltage and the rated voltage of low tension battery is less than default first deviation threshold；

If SOC_h<SOC_l, then the charging voltage of low tension battery charging is default 3rd charging voltage, and charging modes are perseverance Press charging modes；Default 3rd charging voltage is more than the rated voltage of the low tension battery；

Wherein, the SOC_h、SOC_lAnd SOC_uRespectively the real-time state-of-charge of low tension battery, default state-of-charge be most Small value and default state-of-charge maximum.

Further, an optimal technical scheme providing of the present invention is：

The system also includes the first charging voltage preset value and revises module, is configured to detect the reality of the low tension battery When charging current, and according to the real time charging electric current and the deviation of preset charged current maxima, correct described default first Charging voltage.

Further, an optimal technical scheme providing of the present invention is：

The status information of the low pressure electric power storage also includes voltage；

Voltage point of the analysis of the charge parameter of the analysis and Control module mesolow battery also including low tension battery Analyse step；The voltage analysis step of the low tension battery be arranged at the low tension battery state-of-charge analytical procedure it Before；The voltage analysis step of the low tension battery includes：

If U_h<U_th, then the charging voltage of low tension battery charging is default 3rd charging voltage, and charging modes fill for constant pressure Electrically；The U_hAnd U_thThe respectively real-time voltage value and predetermined voltage threshold of low tension battery；

If U_h≥U_th, then according to the low tension battery state-of-charge analytical procedure carry out low tension battery charge parameter Analysis and output.

Further, an optimal technical scheme providing of the present invention is：

The analysis of the charge parameter of the analysis and Control module mesolow battery also includes waiting the equalizaing charge time point Analyse step；The wait equalizaing charge time series analysis step is arranged at before the voltage analysis step of the low tension battery；Institute Stating wait equalizaing charge time series analysis step includes：

If waiting the time for carrying out equalizaing charge to the cell of low tension battery to reach after preset time, low pressure electric power storage The charging voltage of pond charging is default 5th charging voltage, and charging modes are constant voltage charging method, and in the electricity of low tension battery Complete charge when buckling rate is less than default rate of change threshold value；Default 5th charging voltage is more than the low tension battery Rated voltage；

If waiting the time for carrying out equalizaing charge to the cell of low tension battery to be not up to preset time, according to institute The voltage analysis step for stating low tension battery carries out the analysis and output of low tension battery charge parameter.

Further, an optimal technical scheme providing of the present invention is：

The analysis of the charge parameter of the analysis and Control module mesolow battery also state including low tension battery is believed Cease anomaly analysis step；The status information anomaly analysis step of the low tension battery is arranged at the wait equalizaing charge time Before analytical procedure；The status information anomaly analysis step of the low tension battery includes：

If the status information exception and T of low tension battery_ab≥T_thWhen, the charging voltage of low tension battery charging is default 4th charging voltage；Default 4th charging voltage is more than the rated voltage of low tension battery and less than default 3rd charging electricity Pressure；

If the status information exception and T of low tension battery_ab<T_thWhen, then according to the wait equalizaing charge time series analysis step The rapid analysis and output for carrying out low tension battery charge parameter；

Wherein, the T_abFor the status information Abnormal lasting of low tension battery, T_thFor setting time threshold value.

Further, an optimal technical scheme providing of the present invention is：

The status information includes voltage, temperature and the electric current of low tension battery；The abnormal judgement side of the status information Method is：When the state-of-charge or temperature or voltage or electric current of low tension battery are in corresponding preset data abnormal ranges, Then it is judged as that the battery parameter of low tension battery is abnormal.

Further, an optimal technical scheme providing of the present invention is：

The system also includes battery status parameter harvester, is configured to the collection of battery status parameter.

Further, an optimal technical scheme providing of the present invention is：

Described battery status parameter harvester is intelligent battery sensor.

Further, an optimal technical scheme providing of the present invention is：

The system also includes battery charge initiation module；

The battery charge initiation module, is configured to not actuated and voltage of low tension battery is less than in the electric automobile During default feed voltage, start the analysis and Control module.

Further, an optimal technical scheme providing of the present invention is：

The system also includes density of electrolyte monitoring module, is configured to voltage and temperature detection according to low tension battery The density of electrolyte of the low tension battery, and the outputting alarm information after exception occurs for the density of electrolyte；Wherein, it is described When density of electrolyte is in the range of default first data exception, it is judged as that density of electrolyte is abnormal.

Further, an optimal technical scheme providing of the present invention is：

The system also includes internal resistance monitoring module, is configured to calculate described low according to the capacity and voltage of low tension battery Press the internal resistance of battery, and the outputting alarm information after exception occurs for the internal resistance；Wherein, the internal resistance is in default second number During according in abnormal ranges, it is judged as that internal resistance is abnormal.

Further, an optimal technical scheme providing of the present invention is：

The system also includes power transfer module and power transfer module supervising device；

The power transfer module, for exporting charging voltage to low tension battery；

The power transfer module supervising device, is configured to monitor the working condition of the power transfer module.

Further, an optimal technical scheme providing of the present invention is：

The power transfer module supervising device includes first state monitoring module；

The first state monitoring module, is configured in P_h≥P_thAnd e₁>e_th1When outputting alarm information；Or, it is configured to In P_h≥P_thAnd e₂>e_th2When outputting alarm information；

Wherein, the P_hAnd P_thThe respectively operating power of power transfer module and predetermined power threshold value, the e₁For electricity The output voltage setting value of source modular converter and the deviation of output voltage actual value, the e_th1To preset the second deviation threshold；Institute State e₂The deviation of output voltage setting value and low tension battery voltage for power transfer module, the e_th2It is inclined for the default 3rd Poor threshold value.

Further, an optimal technical scheme providing of the present invention is：

The power transfer module supervising device includes the second monitoring module；

Second monitoring module, is configured to carry out the fault level of self diagnosis feedback in the power transfer module During for catastrophe failure, power transfer module described in locking and outputting alarm information.

Further, an optimal technical scheme providing of the present invention is：

The power transfer module supervising device includes third state monitoring module；

The third state monitoring module, is configured to the real work pattern in the power transfer module and default work When pattern is inconsistent, the power transfer module is controlled to believe according to preset charge voltage to low tension battery charging and outputting alarm Breath.

Further, an optimal technical scheme providing of the present invention is：

The power transfer module supervising device includes the 4th monitoring module；

4th monitoring module, is configured to the outputting alarm when the power transfer module output voltage is abnormal and believes Breath；Wherein, when the output voltage of the power transfer module is in the range of default 3rd data exception, it is judged as Power convert Module output voltage is abnormal.

Further, an optimal technical scheme providing of the present invention is：

The power transfer module supervising device includes the 5th monitoring module；

5th monitoring module, is configured to export when the signal transmission passage of the power transfer module is abnormal Warning information；Wherein, when the transmission signal of the signal transmission passage is in the range of default 4th data exception, it is judged as letter Number transmission channel exception.

Further, an optimal technical scheme providing of the present invention is：

The system also includes load supplying control device, is configured to state-of-charge and electric discharge electricity according to low tension battery Stream closes the low-voltage load of different predetermined levels；

The low-voltage load includes the first estate low-voltage load, the load of the second grade low-voltage and tertiary gradient low-voltage load； Wherein, the first estate low-voltage load, the second grade low-voltage load and tertiary gradient low-voltage load closing priority successively Reduction.

Further, an optimal technical scheme providing of the present invention is：

The load supplying control device includes the first load control module, the second load control module and the 3rd load control Molding block；

First load control module, is configured in SOC_h<SOC_th1And I_d>I_th1When close the first estate low-voltage load； Or, it is configured in I_d>I_th2When close the first estate low-voltage load；

Second load control module, is configured in SOC_h<SOC_th1And I_d>I_th3When close the second grade low-voltage load And outputting alarm information；Or, it is configured in I_d>I_th4When close the second grade low-voltage load and outputting alarm information；

3rd load control module, is configured in SOC_h<SOC_th2And I_d>Tertiary gradient low-voltage load is closed when 0 simultaneously Outputting alarm information；Or, it is configured in I_d>I_th5When close tertiary gradient low-voltage load and outputting alarm information；

Wherein, the SOC_h、SOC_th1And SOC_th2The respectively real-time state-of-charge of low tension battery, the first charged threshold value With the second charged threshold value, and SOC_th1>SOC_th2；

The I_d、I_th1、I_th2、I_th3、I_th4And I_th5The respectively discharge current of low tension battery, the first current threshold, Two current thresholds, the 3rd current threshold, the 4th current threshold and the 5th current threshold, and I_th5＞ I_th4＞ I_th2＞＞ I_th3＞ I_th1。

Further, an optimal technical scheme providing of the present invention is：

The system also includes middle control screen and meter display module；

The middle control screen, the warning information for showing low tension battery and power transfer module；

The meter display module, indicator lamp is controlled for the warning information according to low tension battery and power transfer module Turn on/off and alerted, and control indicator lamp to turn on/off after the closing of tertiary gradient low-voltage load and alerted.

Further, an optimal technical scheme providing of the present invention is：

The warning information includes image warning information and/or word warning information.

Further, an optimal technical scheme providing of the present invention is：

The system also includes car networking intelligent terminal and mobile intelligent terminal；The car networking intelligent terminal and mobile intelligence Energy terminal is communicated by wireless network；

The mobile intelligent terminal, the shape of the low tension battery for receiving and showing the car networking intelligent terminal output State information, charge parameter, density of electrolyte and internal resistance.

A kind of technical scheme of electric automobile is in second aspect, the present invention：

The electric automobile includes the low tension battery power management system described in electrokinetic cell and above-mentioned technical proposal；

Described power transfer module is connected with the electrokinetic cell in the low tension battery power management system.

Compared with prior art, above-mentioned technical proposal at least has the advantages that：

1st, the low tension battery power management system of a kind of electric automobile that the present invention is provided, its analysis and Control module can be with Charging voltage according to the real-time state-of-charge automatic adjusument low tension battery of low tension battery；Work as SOC_l≤SOC_h≤SOC_u When the state-of-charge of low tension battery can be maintained to default charged scope [SOC_l,SOC_u] in, work as SOC_h>SOC_uWhen can be with Prevent low tension battery from overcharging, work as SOC_h<SOC_lWhen can prevent low tension battery charge less electricity.

2nd, a kind of electric automobile that the present invention is provided, it includes the low tension battery managing electric quantity described in above-mentioned technical proposal System, can adjust the charging voltage of low tension battery according to the state-of-charge or voltage adaptive of low tension battery and/or fill Electrically.

The low tension battery power management system of scheme 1, a kind of electric automobile, it is characterised in that the system includes battery shape State parameter acquisition module and analysis and Control module；

The analysis and Control module, is configured to the status information according to acquired low tension battery, analyzes and exports low pressure storage The charge parameter of battery.

The low tension battery power management system of scheme 2, electric automobile according to scheme 1, it is characterised in that the low pressure The status information of battery includes state-of-charge；

The analysis of the charge parameter of the analysis and Control module mesolow battery includes the state-of-charge analysis of low tension battery Step, including：

If SOC_l≤SOC_h≤SOC_u, then the charging voltage of low tension battery charging is default first charging voltage；Described default the One charging voltage is set according to the temperature and charging curve of low tension battery；

If SOC_h>SOC_u, then the charging voltage of low tension battery charging is default second charging voltage；Default second charging The deviation of the rated voltage of voltage and low tension battery is less than default first deviation threshold；

If SOC_h<SOC_l, then the charging voltage of low tension battery charging is default 3rd charging voltage, and charging modes fill for constant pressure Electrically；Default 3rd charging voltage is more than the rated voltage of the low tension battery；

Wherein, the SOC_h、SOC_lAnd SOC_uThe respectively real-time state-of-charge of low tension battery, default state-of-charge minimum value With default state-of-charge maximum.

The low tension battery power management system of scheme 3, electric automobile according to scheme 2, it is characterised in that the system Also include the first charging voltage preset value and revise module, be configured to detect the real time charging electric current of the low tension battery, and according to According to the real time charging electric current and the deviation of preset charged current maxima, default first charging voltage is corrected.

The low tension battery power management system of scheme 4, electric automobile according to scheme 2, it is characterised in that the low pressure The status information of battery also includes voltage；

The analysis of the charge parameter of the analysis and Control module mesolow battery also voltage analysis including low tension battery is walked Suddenly；The voltage analysis step of the low tension battery is arranged at before the state-of-charge analytical procedure of the low tension battery；Institute Stating the voltage analysis step of low tension battery includes：

If U_h<U_th, then the charging voltage of low tension battery charging is default 3rd charging voltage, and charging modes are constant-voltage charge side Formula；The U_hAnd U_thThe respectively real-time voltage value and predetermined voltage threshold of low tension battery；

If U_h≥U_th, then according to the low tension battery state-of-charge analytical procedure carry out low tension battery charge parameter point Analysis and output.

The low tension battery power management system of scheme 5, electric automobile according to scheme 4, it is characterised in that the analysis The analysis of the charge parameter of control module mesolow battery also includes waiting equalizaing charge time series analysis step；It is described to wait equal Weighing apparatus charging interval analytical procedure is arranged at before the voltage analysis step of the low tension battery；The wait equalizaing charge time Analytical procedure includes：

If waiting the time for carrying out equalizaing charge to the cell of low tension battery to reach after preset time that low tension battery fills The charging voltage of electricity is default 5th charging voltage, and charging modes are constant voltage charging method, and is become in the voltage of low tension battery Complete charge when rate is less than default rate of change threshold value；Default 5th charging voltage is more than the specified of the low tension battery Voltage；

If waiting the time for carrying out equalizaing charge to the cell of low tension battery to be not up to preset time, according to described low The voltage analysis step of battery is pressed to carry out the analysis and output of low tension battery charge parameter.

The low tension battery power management system of scheme 6, electric automobile according to scheme 5, it is characterised in that the analysis The analysis of the charge parameter of control module mesolow battery also includes the status information anomaly analysis step of low tension battery；Institute The status information anomaly analysis step for stating low tension battery is arranged at before the wait equalizaing charge time series analysis step；It is described The status information anomaly analysis step of low tension battery includes：

If the status information exception and T of low tension battery_ab≥T_thWhen, the charging voltage of low tension battery charging is the default 4th Charging voltage；Default 4th charging voltage is more than the rated voltage of low tension battery and less than default 3rd charging voltage；

If the status information exception and T of low tension battery_ab<T_thWhen, then enter according to the wait equalizaing charge time series analysis step The analysis and output of row low tension battery charge parameter；

The low tension battery power management system of scheme 7, electric automobile according to scheme 6, it is characterised in that the state Information includes voltage, temperature and the electric current of low tension battery；The abnormal determination methods of the status information are：Work as low tension battery State-of-charge or temperature or voltage or electric current when being in corresponding preset data abnormal ranges, then be judged as low tension battery Battery parameter it is abnormal.

The low tension battery power management system of scheme 8, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes battery status parameter harvester, is configured to the collection of battery status parameter.

The low tension battery power management system of scheme 9, electric automobile according to scheme 8, it is characterised in that described electricity Pond state parameter harvester is intelligent battery sensor.

The low tension battery power management system of scheme 10, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes battery charge initiation module；

The battery charge initiation module, be configured to the electric automobile is not actuated and voltage of low tension battery be less than it is default During feed voltage, start the analysis and Control module.

The low tension battery power management system of scheme 11, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes density of electrolyte monitoring module, is configured to according to described in the voltage and temperature detection of low tension battery The density of electrolyte of low tension battery, and the outputting alarm information after exception occurs for the density of electrolyte；Wherein, the electrolysis When liquid-tight degree is in the range of default first data exception, it is judged as that density of electrolyte is abnormal.

The low tension battery power management system of scheme 12, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes internal resistance monitoring module, is configured to calculate the low pressure storage according to the capacity and voltage of low tension battery The internal resistance of battery, and the outputting alarm information after exception occurs for the internal resistance；Wherein, the internal resistance is different in default second data When in normal scope, it is judged as that internal resistance is abnormal.

The low tension battery power management system of scheme 13, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes power transfer module and power transfer module supervising device；

The low tension battery power management system of scheme 14, electric automobile according to scheme 13, it is characterised in that the electricity Source modular converter supervising device includes first state monitoring module；

The first state monitoring module, is configured in P_h≥P_thAnd e₁>e_th1When outputting alarm information；Or, it is configured in P_h ≥P_thAnd e₂>e_th2When outputting alarm information；

Wherein, the P_hAnd P_thThe respectively operating power of power transfer module and predetermined power threshold value, the e₁Turn for power supply Change the mold the output voltage setting value of block and the deviation of output voltage actual value, the e_th1To preset the second deviation threshold；The e₂ The deviation of output voltage setting value and low tension battery voltage for power transfer module, the e_th2To preset the 3rd deviation threshold Value.

The low tension battery power management system of scheme 15, electric automobile according to scheme 13, it is characterised in that the electricity Source modular converter supervising device includes the second monitoring module；

Second monitoring module, the fault level for being configured to carry out self diagnosis feedback in the power transfer module is tight During weight failure, power transfer module described in locking and outputting alarm information.

The low tension battery power management system of scheme 16, electric automobile according to scheme 13, it is characterised in that the electricity Source modular converter supervising device includes third state monitoring module；

The third state monitoring module, is configured to the real work pattern and default mode of operation in the power transfer module When inconsistent, the power transfer module is controlled to be charged according to preset charge voltage to low tension battery and outputting alarm information.

The low tension battery power management system of scheme 17, electric automobile according to scheme 13, it is characterised in that the electricity Source modular converter supervising device includes the 4th monitoring module；

4th monitoring module, is configured to the outputting alarm information when the power transfer module output voltage is abnormal； Wherein, when the output voltage of the power transfer module is in the range of default 3rd data exception, it is judged as Power convert mould Block output voltage is abnormal.

The low tension battery power management system of scheme 18, electric automobile according to scheme 13, it is characterised in that the electricity Source modular converter supervising device includes the 5th monitoring module；

5th monitoring module, is configured to the outputting alarm when the signal transmission passage of the power transfer module is abnormal Information；Wherein, when the transmission signal of the signal transmission passage is in the range of default 4th data exception, it is judged as that signal is passed Defeated channel abnormal.

The low tension battery power management system of scheme 19, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes load supplying control device, is configured to close according to the state-of-charge and discharge current of low tension battery Close the low-voltage load of different predetermined levels；

The low-voltage load includes the first estate low-voltage load, the load of the second grade low-voltage and tertiary gradient low-voltage load；Wherein, The closing priority of the first estate low-voltage load, the load of the second grade low-voltage and tertiary gradient low-voltage load is reduced successively.

The low tension battery power management system of scheme 20, electric automobile according to scheme 19, it is characterised in that described negative Carrying power supply control apparatus includes the first load control module, the second load control module and the 3rd load control module；

First load control module, is configured in SOC_h<SOC_th1And I_d>I_th1When close the first estate low-voltage load；Or Person, is configured in I_d>I_th2When close the first estate low-voltage load；

Second load control module, is configured in SOC_h<SOC_th1And I_d>I_th3When close the second grade low-voltage load and it is defeated Go out warning information；Or, it is configured in I_d>I_th4When close the second grade low-voltage load and outputting alarm information；

3rd load control module, is configured in SOC_h<SOC_th2And I_d>Tertiary gradient low-voltage load is closed when 0 and is exported Warning information；Or, it is configured in I_d>I_th5When close tertiary gradient low-voltage load and outputting alarm information；

Wherein, the SOC_h、SOC_th1And SOC_th2The respectively real-time state-of-charge of low tension battery, the first charged threshold value and Two charged threshold values, and SOC_th1>SOC_th2；

The I_d、I_th1、I_th2、I_th3、I_th4And I_th5Respectively the discharge current of low tension battery, the first current threshold, second electricity Flow threshold value, the 3rd current threshold, the 4th current threshold and the 5th current threshold, and I_th5＞ I_th4＞ I_th2＞＞ I_th3＞ I_th1。

The low tension battery power management system of scheme 21, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes middle control screen and meter display module；

The meter display module, for the warning information control indicator lamp according to low tension battery and power transfer module it is bright/ Go out and alerted, and control indicator lamp to turn on/off after the closing of tertiary gradient low-voltage load and alerted.

The low tension battery power management system of scheme 22, electric automobile according to scheme 21, it is characterised in that

The low tension battery power management system of scheme 23, electric automobile according to any one of scheme 1-7, its feature exists In the system also includes car networking intelligent terminal and mobile intelligent terminal；The car networking intelligent terminal is whole with intelligent movable End is communicated by wireless network；

The mobile intelligent terminal, the state letter of the low tension battery for receiving and showing the car networking intelligent terminal output Breath, charge parameter, density of electrolyte and internal resistance.

Scheme 24, a kind of electric automobile, including electrokinetic cell, it is characterised in that the electric automobile is included according to scheme 1-23 Any one of low tension battery power management system；

Brief description of the drawings

Fig. 1 is the low tension battery power management system structural representation of electric automobile in the embodiment of the present invention；

Fig. 2 is a kind of low tension battery managing electric quantity implementing procedure figure in the embodiment of the present invention；

Fig. 3 is electric automobile low-pressure system schematic diagram in the embodiment of the present invention；

Fig. 4 is another low tension battery managing electric quantity implementation process diagram in the embodiment of the present invention；

Fig. 5 is the warning information type schematic diagram that electric automobile display instrument is shown in the embodiment of the present invention；

Fig. 6 is another low tension battery managing electric quantity schematic diagram in the embodiment of the present invention；

Fig. 7 is mesolow of embodiment of the present invention load closing/startup schematic diagram；

Fig. 8 is another low tension battery managing electric quantity schematic diagram in the embodiment of the present invention；

Fig. 9 is another low tension battery managing electric quantity schematic diagram in the embodiment of the present invention；

Wherein, 11：Battery status parameter acquisition module；12：Analysis and Control module；21：Power transfer module；22：Low pressure Battery；23：Electrokinetic cell；24：Car networking intelligent terminal；25：Middle control screen；26：Intelligent battery sensor；27：Vehicle control Device processed；28：Display instrument；29：Low-voltage load；101：The first estate low-voltage load closedown condition；102：Second grade low-voltage is born Carry closedown condition；103：Tertiary gradient low-voltage load closedown condition；201：Entry condition after the closing of tertiary gradient low-voltage load； 202：Entry condition after the load closing of second grade low-voltage；201：Entry condition after the closing of the first estate low-voltage load.

Embodiment

The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this A little embodiments are used only for explaining the technical principle of the present invention, it is not intended that limit the scope of the invention.

The traveling road conditions or running environment randomness of electric automobile are than larger so that the electrical energy demands amount ripple of its low-pressure system It is dynamic larger, and then cause the fluctuation range of low tension battery dump energy also than larger.When control power transfer module is to low pressure During the charging voltage of battery output fixation, it may result in low tension battery and occur charge less or situation about overcharging.Meanwhile, power supply Modular converter and low tension battery are as the power supply of electric automobile low-pressure system, and its functional reliability will directly affect low pressure Whether load being capable of normal work.Based on this, the invention provides a kind of low tension battery power management system of electric automobile, Can be by the real-time state-of-charge automatic adjusument charging voltage according to low tension battery so that the electricity of low tension battery can be with Maintain default state-of-charge scope.Can also accurately it sentence when low tension battery or power transfer module are in abnormal work The fault type of disconnected low tension battery and power transfer module, and alert in time.

Below in conjunction with the accompanying drawings, the low tension battery power management system of electric automobile in the embodiment of the present invention is carried out specifically Explanation.

Fig. 1 illustrates the structure of the present embodiment mesolow accumulator electric-quantity management system, as illustrated, this implementation Example mesolow accumulator electric-quantity management system can include battery status parameter acquisition module 11 and analysis and Control module 12.Its In, battery status parameter acquisition module 11 is configurable to obtain the status information of low pressure electric power storage, i.e. battery status parameter and obtained Module 11 can obtain the status information of the battery status parameter harvester output of low tension battery.Analysis and Control module 12 can To be configured to the status information according to acquired low pressure electric power storage, the charge parameter of low tension battery is analyzed and exported.

The status information of the present embodiment mesolow battery can include state-of-charge, and analysis and Control module 12 is according to low pressure The state-of-charge of battery, can be with the charge parameter of automatic adjusument low tension battery.Specifically, the present embodiment analysis and Control mould The analysis of the charge parameter of the mesolow battery of block 12 includes the state-of-charge analytical procedure of low tension battery, specifically includes：

The real-time state-of-charge of the low tension battery obtained according to battery status parameter acquisition module 11, and preset charged shape State scope, determines the charge parameter of low tension battery：

If SOC_l≤SOC_h≤SOC_u, then the charging voltage of low tension battery charging is default first charging voltage.Wherein, Default first charging voltage can be set according to the temperature and charging curve of low tension battery；SOC_h、SOC_lAnd SOC_uIt is respectively low Press real-time state-of-charge, default state-of-charge minimum value and the default state-of-charge maximum of battery.The present embodiment mesolow When the state-of-charge of battery is in the range of default state-of-charge, it can be adjusted according to the temperature and charging curve of low tension battery Charging voltage is saved, the state-of-charge of low tension battery is maintained in the range of default state-of-charge.

Wherein, the first charging voltage can be set in the present embodiment as steps described below, is specially：Low pressure is obtained first to store The battery parameter of battery, the battery parameter that the battery parameter can provide for the manufacturer of low tension battery, contains low pressure The charging voltage threshold value and charging current threshold value of battery at different temperatures；Then according to low tension battery real time temperature and Above-mentioned battery parameter, it is determined that charging voltage threshold value corresponding with the real time temperature and charging current threshold value；What last foundation was obtained Charging voltage threshold value and charging current threshold value set the magnitude of voltage of default 3rd charging voltage.

If SOC_h>SOC_u, then the charging voltage of low tension battery charging is default second charging voltage.Wherein, second is preset The deviation of charging voltage and the rated voltage of low tension battery is less than default first deviation threshold.The present embodiment mesolow battery State-of-charge when being more than default state-of-charge maximum, show that low tension battery is in overcharging state；Preset by setting this First deviation threshold so that default second charging voltage is approached with rated voltage, it is ensured that the charging current of low tension battery is less than Or equal to 0, prevent low tension battery to be continuously in overcharging state.

Meanwhile, low tension battery is small-capacity cells, when its state-of-charge is more than default state-of-charge maximum, according to Default second charging voltage charges to it, can prevent low tension battery during powering to the load because not enough power supply causes to bear The situation for carrying cisco unity malfunction occurs.

If SOC_h<SOC_l, then the charging voltage of low tension battery charging is default 3rd charging voltage, and charging modes are perseverance Press charging modes.Wherein, the rated voltage that the 3rd charging voltage is more than low tension battery is preset.The present embodiment mesolow battery State-of-charge when being less than default state-of-charge minimum value, show that low tension battery is in serious feed condition, passing through will Charging voltage is set greater than the fixed voltage value of low tension battery rated voltage, it is possible to achieve low tension battery is carried out quick Charging.

The status information of the present embodiment mesolow battery can also include voltage, and analysis and Control module 12 stores according to low pressure The voltage of battery, can be with the charge parameter of automatic adjusument low tension battery.Specifically, in the present embodiment analysis and Control module 12 The analysis of the charge parameter of low tension battery also includes the voltage analysis step of low tension battery, and the voltage of low tension battery Analytical procedure is arranged at before the state-of-charge analytical procedure of low tension battery, is specifically included

If U_h<U_th, then the charging voltage of low tension battery charging is default 3rd charging voltage, and charging modes fill for constant pressure Electrically.Wherein, U_hAnd U_thThe respectively real-time voltage value and predetermined voltage threshold of low tension battery.The present embodiment mesolow stores When the voltage of battery is less than predetermined voltage threshold, show that low tension battery is in serious feed condition, pass through the electricity that will charge Pressure is set greater than the fixed voltage value of low tension battery rated voltage, it is possible to achieve carry out quick charge to low tension battery.

Fig. 6 illustrates the present embodiment mesolow accumulator electric-quantity management system automatic adjusument low tension battery and filled The implementation process of piezoelectric voltage, as illustrated, the real-time status that low tension battery power management system can be according to low tension battery Information, adjusts the charging voltage of low tension battery.For example, after the parameters initialization of low tension battery power management system, Detect the charging of analysis control module 12 setting low tension battery charging when low pressure power storage cell is in state-of-charge low operating mode Voltage is default 3rd charging voltage, the analysis and Control mould when charging process mesolow battery reaches state-of-charge balance condition Block 12 sets the charging voltage of low tension battery charging to preset the first charging voltage.In another example, detect low pressure power storage cell The charging voltage of low tension battery charging is set as default second charging in the high operating mode time-division analysis control module 12 of state-of-charge Voltage, the setting low tension battery of control module 12 is analyzed when charging process mesolow battery reaches state-of-charge balance condition The charging voltage of charging is default first charging voltage.Wherein, the low operating mode of state-of-charge refers to that state-of-charge is SOC_h<SOC_l When operating mode, state-of-charge balance condition refer to state-of-charge be SOC_l≤SOC_h≤SOC_uWhen operating mode, state-of-charge senior engineer Condition refers to that state-of-charge is SOC_h>SOC_uWhen operating mode.

Further, mesolow of embodiment of the present invention accumulator electric-quantity management system can also be pre- including the first charging voltage If value revision module, the first charging voltage preset value revision module is configurable to detect the real time charging electricity of low tension battery Stream, and according to real time charging electric current and the deviation of preset charged current maxima, default first charging voltage of amendment.

In the present embodiment during the temperature according to low tension battery and charging curve regulation charging voltage, it can pass through The mode of default first charging voltage of amendment prevents from overcharging low tension battery, is specially：Low tension battery is detected first Real time charging electric current, the deviation of real time charging electric current and preset charged current maxima is then calculated, finally according to the deviation Default 3rd output voltage of amendment, for example, can preset the 3rd output voltage using the amendment of PI control methods.

Further, the optimal technical scheme of a kind of low tension battery power management system provided in an embodiment of the present invention In, low tension battery is lead-acid battery, can provide 12V voltages, the default lotus of the lead-acid battery to electric automobile low-pressure system Electricity condition scope is 75%~98%, that is, presets state-of-charge minimum value SOC_l=75%, preset state-of-charge maximum SOC_u= 98%, predetermined voltage threshold U_th=10.6V.

When the state-of-charge of lead-acid battery is 75%≤SOC_hWhen≤98%, show that the lead-acid battery is in and charge normal shape State, can set default first charging voltage, it is possible to use PI control methods according to the temperature and charging curve of lead-acid battery Default first charging voltage is modified, prevents lead-acid battery from overcharging.

When the state-of-charge of lead-acid battery is SOC_h>When 98%, show that the lead-acid battery is in overcharging state, therefore can To set default second charging voltage as 12V so that the charging current of lead-acid battery is 0.

When the state-of-charge of lead-acid battery is SOC_h<When 75%, show that the lead-acid battery is seriously fed, therefore can be with It is 14.4V to set default 3rd charging voltage, is charged using constant voltage charging method to lead-acid battery.Or, when lead-acid battery Voltage is U_h<During 10.6V, also indicate that the lead-acid battery is seriously fed, therefore can set default 3rd charging voltage to be 14.4V, is charged using constant voltage charging method to lead-acid battery.

Further, the analysis of the charge parameter of analysis and Control of embodiment of the present invention module mesolow battery also include etc. Charging interval analytical procedure to be equalized, and wait equalizaing charge time series analysis step to be arranged at the voltage analysis of low tension battery Before step, specifically include：

Analysis and Control module 12 can be carried out equalizaing charge to low tension battery, subtracted according to preset time in the present embodiment The voltage differences of cell in small low tension battery：

If waiting the time for carrying out equalizaing charge to the cell of low tension battery to reach after preset time, low pressure is set The charging voltage of battery charging is default 5th charging voltage, and charging modes are constant voltage charging method, are fallen into a trap in charging process The voltage change ratio of low tension battery is calculated, the complete charge after voltage change ratio is less than default rate of change threshold value.

If waiting the time for carrying out equalizaing charge to the cell of low tension battery to be not up to preset time, according to low The voltage analysis step of battery is pressed to carry out the analysis and output of low tension battery charge parameter.

Equalizaing charge is carried out in the present embodiment to the cell of low tension battery and refers to voltage with low tension battery Rate of change is criterion, low tension battery is charged so that the electricity of each cell of low tension battery maintains identical for a long time Electricity in the range of.

Wherein, periodicity charging, the preset time can be carried out to low tension battery according to preset time in the present embodiment It can be 14 days.Default 5th charging voltage, which is more than in the rated voltage of low tension battery, the present embodiment, presets the 5th charging electricity Pressure and default 3rd charging voltage can be with identical, can also difference.

Below in conjunction with the accompanying drawings, the charging course of work to the present embodiment mesolow battery is illustrated.

Fig. 2 illustrates the charging implementing procedure of the present embodiment mesolow battery, as illustrated, in the present embodiment Low tension battery can be charged as steps described below, be specially：

Step S101：Judge whether wait reaches to the time of the cell progress equalizaing charge of low tension battery default Time：If reaching execution step S102, if not up to performing step S103.

Step S102：Equalizaing charge is carried out to low tension battery：The charging voltage for setting low tension battery charging is default 5th charging voltage, charging modes are constant voltage charging method, and the voltage change ratio of low tension battery is calculated in charging process, when The voltage change ratio is less than complete charge after default rate of change threshold value.

Step S103：Judge whether the voltage of low tension battery is less than predetermined voltage threshold：Step is performed if being less than S104, step S105 is performed if predetermined voltage threshold is more than or equal to.

Step S104：The charging voltage of low tension battery charging is set as default 3rd charging voltage, charging modes are perseverance Charging modes are pressed, low tension battery is charged.

Step S105：Real-time state-of-charge according to low tension battery determines charge parameter：

If SOC_l≤SOC_h≤SOC_u, then the charging voltage of low tension battery charging is default first charging voltage；If SOC_h >SOC_u, then the charging voltage of low tension battery charging is default second charging voltage；If SOC_h<SOC_l, then low tension battery fill The charging voltage of electricity is default 3rd charging voltage, and charging modes are constant voltage charging method.

Further, the analysis of the charge parameter of analysis and Control of embodiment of the present invention module mesolow battery also includes low The status information anomaly analysis step of battery is pressed, and the status information anomaly analysis step of low tension battery is arranged at wait Before equalizaing charge time series analysis step, specifically include：

Analysis and Control module 12 can be when the status information of low tension battery occurs abnormal, according to state in the present embodiment The duration of Information abnormity adaptively adjusts the charging voltage and/or charging modes of low tension battery.Specially：

If the status information exception and T of low tension battery_ab≥T_thWhen, set low tension battery charging charging voltage as Default 4th charging voltage.Wherein, preset the 4th charging voltage and be more than the rated voltage of low tension battery and less than the default 3rd Charging voltage.T_abFor the status information Abnormal lasting of low tension battery, T_thFor setting time threshold value.For example, low pressure electric power storage The rated voltage in pond is 12V, when presetting the first charging voltage for 14.4V, can be set as default 4th charging voltage 13.8V。

If the status information exception and T of low tension battery_ab<T_thWhen, then enter according to wait equalizaing charge time series analysis step The analysis and output of row low tension battery charge parameter.

Specifically, it can implement as steps described below in the present embodiment：

(1) duration of low tension battery generating state Information abnormity is detected.

(2) due to low tension battery failure, battery status parameter harvester failure or electric automobile inner electronic equipment Interfering may cause the status information of low tension battery to occur exception, therefore in order to exclude because electronic equipment is mutually dry The transient fault caused by factor such as disturb, in addition it is also necessary to judge whether the duration reaches preset time threshold：Can be true if reaching Recognize and broken down, then can set the charging voltage of low tension battery as the 4th charging voltage.

Wherein, it can judge whether the status information of low tension battery occurs exception by the following method in the present embodiment： When the state-of-charge or temperature or voltage or electric current of low tension battery are in corresponding preset data abnormal ranges, then judge It is abnormal for the status information of low tension battery.Any one state in state-of-charge, temperature, voltage and current i.e. in the present embodiment When information is in corresponding preset data abnormal ranges, it may determine that abnormal for the status information of low tension battery.

Wherein, it can judge whether the battery parameter abnormal duration reaches in the present embodiment by the following method default Time threshold：Calculated by counter and status information exception is recurred in the battery status parameter detection cycle of low tension battery Amount of cycles, then determine that the status information abnormal duration reaches preset time threshold after the amount of cycles reaches certain value Value.For example, the corresponding abnormal amount of cycles of status information that recurs of preset time threshold is 10, the initial value of counter is 0.When in the 1st battery status parameter detection cycle generating state Information abnormity then counter adds 1, in the 2nd battery status Then counter continues cumulative 1 to generating state Information abnormity in the parameter detecting cycle, in the 3rd battery status parameter detection cycle Then counter subtracts 1 to non-generating state Information abnormity, then can confirm that the 1st, the shape that 2 battery status parameter detection cycles occur State Information abnormity is transient fault.When the equal generating state Information abnormity in the 1st~10 battery status parameter detection cycle, The accumulated value that 10th battery status parameter detection cycle terminates rear counter is 10, then can confirm that status information extremely to be non- Transient fault, shows to have occurred and that failure.

Further, the low tension battery power management system of electric automobile can also include following knots in the present embodiment Structure, be specially：

The present embodiment mesolow accumulator electric-quantity management system can include battery status parameter harvester, the battery shape State parameter acquisition devices are configurable to the collection of battery status parameter, from the foregoing it will be appreciated that battery status parameter acquisition module 11 The status information of low tension battery can be obtained, therefore battery status parameter acquisition module 11 can be with battery shape in the present embodiment State parameter acquisition devices are connected, for obtaining the low tension battery status information that battery status parameter harvester is collected.Its In, battery status parameter harvester can be intelligent battery sensor.

Further, battery status parameter harvester can include feedback of status module in the present embodiment, and the state is anti- Feedback module can be used for the letter for sending battery status parameter to analysis and Control module 12 by battery status parameter acquisition module 11 Number state, and battery status parameter harvester, battery status parameter acquisition module and analysis and Control module signal of communication shape State.Wherein, analysis and Control module 12 can battery status parameter signal condition or communication signal conditions be disarmed state when, The charging voltage of low tension battery charging is set to preset the 4th charging voltage.I.e. in battery status parameter harvester failure, Or the transmission channel of battery status parameter harvester and battery status parameter acquisition module 11, or battery status parameter acquisition mould During the transmission channel failure of block 11 and analysis and Control module 12, the charging voltage of low tension battery charging can be set to preset the Four charging voltages.

The present embodiment mesolow accumulator electric-quantity management system can include battery charge initiation module, and battery charging is opened Dynamic model block is configurable to, when electric automobile is not actuated and voltage of low tension battery is less than default feed voltage, start analysis Control module 12.

Battery charge initiation module can detect low tension battery in real time when electric automobile is not actuated in the present embodiment Voltage, and send the first enabling signal to analysis and Control module 12 when voltage is less than default feed voltage；It can also connect simultaneously Receive the voltage for the low tension battery that battery status parameter harvester is detected in real time and when voltage is less than default feed voltage The first enabling signal is sent to analysis and Control module 12.Electricity can be respectively started according to the first enabling signal in analysis and Control module 12 After the electrokinetic cell controller and power transfer module of electrical automobile, voltage analysis step, lotus described in execution the embodiment above Electricity condition analytical procedure or equalizaing charge analytical procedure, you can to enter when electric automobile is not actuated for a long time to low tension battery Row charging, prevents low tension battery from feeding.

The present embodiment mesolow accumulator electric-quantity management system can also include density of electrolyte monitoring module, the electrolyte Density monitoring module is configurable to voltage and the density of electrolyte of temperature detection low tension battery according to low tension battery, and The outputting alarm information after exception occurs for density of electrolyte.Wherein, density of electrolyte is in the range of default first data exception When, it is judged as that density of electrolyte is abnormal.For example, being judged as that density of electrolyte is abnormal when density of electrolyte is less than certain numerical value.

It can be obtained in the present embodiment by the way of tabling look-up and different voltages, the corresponding low tension battery electrolyte of temperature Density is comprising the parameter information of the voltage of low tension battery, temperature and density of electrolyte corresponding relation can pass through low pressure The manufacturer of battery obtains.

The present embodiment mesolow accumulator electric-quantity management system can include internal resistance monitoring module, and the internal resistance monitoring module can The internal resistance of low tension battery is calculated with the capacity and voltage that are configured to according to low tension battery, and is exported after exception occurs for internal resistance Warning information.Wherein, when internal resistance is in the range of default second data exception, it is judged as that internal resistance is abnormal.For example, when internal resistance is higher than It is judged as that internal resistance is abnormal during certain numerical value.

It can be determined in the present embodiment according to the voltage of low tension battery and the ratio relation of capacity in low tension battery Resistance is comprising the voltage of low tension battery and the parameter information of ratio relation of capacity can be by the systems of low tension battery Make manufacturer's acquisition.

The present embodiment mesolow accumulator electric-quantity management system can include power transfer module and power transfer module is supervised Control device.Wherein, power transfer module can be used for exporting charging voltage, power transfer module supervising device to low tension battery It is configurable to monitor the working condition of power transfer module.Specifically, power transfer module supervising device can in the present embodiment With including first state monitoring module, the second monitoring module, third state monitoring module, the 4th monitoring module and Five monitoring modules.

First state monitoring module is configurable in P_h≥P_thAnd e₁>e_th1When outputting alarm information, can also be configured to In P_h≥P_thAnd e₂>e_th2When outputting alarm information.Wherein, P_hAnd P_thThe respectively operating power of power transfer module and default Power threshold, e₁The deviation of output voltage setting value and output voltage actual value for power transfer module, e_th1To preset second Deviation threshold；e₂The deviation of output voltage setting value and low tension battery voltage for power transfer module, e_th2To preset the 3rd Deviation threshold.

The fault level that second monitoring module is configurable to carry out self diagnosis feedback in power transfer module is tight During weight failure, locking power transfer module and outputting alarm information.Wherein, catastrophe failure can be to need power transfer module to prohibit The failure only run, or need power transfer module promptly lower electric failure.

Third state monitoring module is configurable to real work pattern and default mode of operation in power transfer module When inconsistent, control power transfer module charges and outputting alarm information according to preset charge voltage to low tension battery.Wherein, Show that power transfer module can not ring when the real work pattern and inconsistent default mode of operation of power transfer module Control instruction is answered, so as to can not determine whether power transfer module works, therefore power transfer module can be controlled according to default Charging voltage charges to low tension battery, prevents low tension battery from feeding, and then influences the low-voltage load of electric automobile just Often work.

4th monitoring module is configurable to the outputting alarm information when power transfer module output voltage is abnormal.Its In, when the output voltage of power transfer module is in the range of default 3rd data exception, it is judged as that power transfer module is exported Electric voltage exception.Meanwhile, it may be power transfer module and low pressure electric power storage to cause the reason for power transfer module output voltage is abnormal Open circuit occurs for the low-voltage circuit between pond, if now the voltage of low tension battery is less than its rated voltage, and power transfer module It with Normal Feedback electric current, can show that the working condition of power transfer module is normal, but the low-voltage circuit of itself and low tension battery can Can occur open circuit.

5th monitoring module is configurable to the outputting alarm when the signal transmission passage of power transfer module is abnormal Information.Wherein, when the transmission signal of signal transmission passage is in the range of default 4th data exception, it is judged as that signal transmission is logical Road is abnormal.Power transfer module can be connected by CAN with power transfer module supervising device, when CAN generation is different During normal or failure, the signal that power transfer module is exported through CAN to power transfer module supervising device may be distortion letter Number, it is therefore desirable to timely outputting alarm information.

The enable condition of power transfer module normal work can include in the present embodiment：

(1) electrokinetic cell voltage of the input terminal voltage of power transfer module close to electric automobile；(2) in electric automobile High-voltage relay is closed；(3) state-of-charge of electrokinetic cell is more than 5%；(4) power that power transfer module is received can be met The power demand of power transfer module.After above-mentioned enable condition is met, power transfer module can be defeated to low tension battery Go out charging voltage.

Power transfer module can be converted to the high-tension current that electrokinetic cell is exported low-tension current to the negative of electric automobile Power supply is carried, but in the electric energy needed for the work simultaneously of power transfer module and low tension battery can not meet low-voltage load, In order to ensure that the equipment for being related to electric automobile trouble free service in electric automobile can suitably be closed with normal work and be not related to electricity The low-voltage load of electrical automobile trouble free service.Based on this, the present embodiment mesolow accumulator electric-quantity management system can include load Power supply control apparatus, the load supplying control device is configurable to close according to the state-of-charge and discharge current of low tension battery Close the low-voltage load of different predetermined levels.

Wherein, low-voltage load includes the first estate low-voltage load, the load of the second grade low-voltage and tertiary gradient low-voltage load, And the first estate low-voltage load, the second grade low-voltage are loaded and the closing priority of tertiary gradient low-voltage load is reduced successively. Specifically, in the present embodiment load supplying control device can include the first load control module, the second load control module and 3rd load control module.

First load control module is configurable in SOC_h<SOC_th1And I_d>I_th1When close the first estate low-voltage load, It can also be configured in I_d>I_th2When close the first estate low-voltage load.Wherein, SOC_h、SOC_th1And SOC_th2Respectively low pressure stores The real-time state-of-charge of battery, the first charged threshold value and the second charged threshold value, and SOC_th1>SOC_th2.When the lotus of low tension battery When electricity condition is less than the first charged threshold value and discharge current and is more than the first current threshold, show the state-of-charge of low tension battery compared with It is low, but with larger discharge current, now the negative of low tension battery can be mitigated by closing the first estate low-voltage load Lotus pressure.When the discharge current of low tension battery is more than the second current threshold, show not consider the charged shape of low tension battery In the case of state, the low-voltage load that electric automobile is in electricity consumption working condition is more, such as under vehicle running state, and braking is true The low pressure such as empty pump, headlight are more with electric loading, now can mitigate low tension battery by closing the first estate low-voltage load Load pressure.

Second load control module is configurable in SOC_h<SOC_th1And I_d>I_th3When close the second grade low-voltage load simultaneously Outputting alarm information, can also be configured in I_d>I_th4When close the second grade low-voltage load and outputting alarm information.Work as low pressure When the state-of-charge of battery is less than the first charged threshold value and discharge current and is more than three current thresholds, show low tension battery State-of-charge is relatively low, but with larger discharge current, now can be by closing the second grade low-voltage load reduction low pressure The load pressure of battery, while control screen can also be sent a warning message as in, reminds electric automobile human pilot second etc. The information that level low-voltage load is closed.When the discharge current of low tension battery is more than four current thresholds, show not consider low pressure In the case of the state-of-charge of battery, the low-voltage load that electric automobile is in electricity consumption working condition is more, can now pass through The load pressure of the second grade low-voltage load reduction low tension battery is closed, while alarm letter can also be sent to middle control screen Breath, the information for reminding the load of the second grade low-voltage of electric automobile human pilot to close.

3rd load control module is configurable in SOC_h<SOC_th2And I_d>Tertiary gradient low-voltage load is closed when 0 and defeated Go out warning information, can also be configured in I_d>I_th5When close tertiary gradient low-voltage load and outputting alarm information.When low pressure stores When the state-of-charge of battery is less than the second charged threshold value and discharge current and is more than 0, show that the state-of-charge of low tension battery is relatively low, But with larger discharge current, can now mitigate the load pressure of low tension battery by closing tertiary gradient low-voltage load Power, while can also be sent a warning message to control screen, reminds electric automobile human pilot tertiary gradient low-voltage load to close Information.When the discharge current of low tension battery is more than five current thresholds, show not consider the charged shape of low tension battery In the case of state, the low-voltage load that electric automobile is in electricity consumption working condition is more, now can be low by closing the tertiary gradient The load pressure of load reduction low tension battery is pressed, while can also be sent a warning message to middle control screen, electric automobile is reminded The information that human pilot tertiary gradient low-voltage load is closed.

Wherein, I_d、I_th1、I_th2、I_th3、I_th4And I_th5Respectively the discharge current of low tension battery, the first current threshold, Second current threshold, the 3rd current threshold, the 4th current threshold and the 5th current threshold, and I_th5＞ I_th4＞ I_th2＞＞ I_th3＞ I_th1.For example, the first current threshold can be I_th1=50mA, the second current threshold can be I_th2=200A, the 3rd current threshold Can be I_th3=1A, the 4th current threshold can be I_th4=250A, the 5th current threshold can be I_th5=300A, the first lotus Electric threshold value can be SOC_th1=75%, it can be SOC that the second charged threshold value, which is,_th2=70%.

The first estate low-voltage load, the load of the second grade low-voltage and tertiary gradient low-voltage load are not relate in the present embodiment And the low-voltage load of electric automobile work safety, and the specific load that the load of each grade low-voltage is included can be according to default grade Division principle is set.For example, being set after being closed according to low-voltage load to the sensory experience value of electric automobile human pilot, tool Body：The first estate low-voltage load can include heater, the lighting device of electric automobile, and not be related to electric automobile peace The control device worked entirely.The load of second grade low-voltage can include entertainment device and not be related to the control of electric automobile trouble free service Device processed.Tertiary gradient low-voltage load can include automobile comfort system and not be related to the bus section of electric automobile trouble free service Point.Wherein, automobile comfort system refers to improving electric car body and/or human pilot comfort level is on the run System, such as automobile comfort system can include vehicle window/skylight automaton, seat posture automatic regulating apparatus.

Fig. 7 illustrates the present embodiment mesolow load closing/startup implementing procedure figure, as illustrated, this implementation The first charged threshold value is set as SOC in example_th1=75%, second charged threshold value is SOC_th2=70%, first current threshold is I_th1 =50mA, the second current threshold are I_th2=200A, the 3rd current threshold are I_th3=1A, the 4th current threshold are I_th4=250A, 5th current threshold is I_th5=300A.

Wherein, the first estate low-voltage load closedown condition 101 is less than 75% and electric discharge for the state-of-charge of low tension battery Electric current is more than 50mA, or is more than 200A for discharge current.Second grade low-voltage load closedown condition 102 is low tension battery State-of-charge is less than 75% and discharge current is more than 1A, or is more than 250A for discharge current.Tertiary gradient low-voltage load is closed Condition 103 is less than 70% for the state-of-charge of low tension battery and discharge current is more than 0, or is more than 300A for discharge current.

Correspondingly, the entry condition 201 after tertiary gradient low-voltage load is closed is more than for the state-of-charge of low tension battery 70% and less than 75%, discharge current is less than 300A.Entry condition 202 after the load of second grade low-voltage is closed is low pressure electric power storage The state-of-charge in pond is more than 70% and less than 75%, and discharge current is less than 1A；Or be more than 200A for discharge current and be less than 250A.Entry condition 203 after the first estate low-voltage load is closed is more than 75% for the state-of-charge of low tension battery；Or be Discharge current is less than 200A, can be achieved to exit low-voltage load closing implementing procedure after the first estate low-voltage load starts.

The present embodiment mesolow accumulator electric-quantity management system can include middle control screen and meter display module.Wherein, Middle control screen is displayed for low tension battery and the warning information of power transfer module.Meter display module can be used for according to Turn on/off and alerted according to low tension battery and the warning information of power transfer module control indicator lamp, and in tertiary gradient low pressure Control indicator lamp, which is turned on/off, after load is closed is alerted.

Wherein, in the present embodiment warning information can be image warning information, word warning information, or image alarm letter Cease the warning information being combined with word warning information.By middle control screen display warning information, electric automobile can be reminded to drive Sail the fault message that personnel have found low tension battery in time.

The present embodiment mesolow accumulator electric-quantity management system can include car networking intelligent terminal and mobile intelligent terminal, The car networking intelligent terminal is communicated with mobile intelligent terminal by wireless network.Mobile intelligent terminal can be used for receiving simultaneously Show status information, charge parameter, density of electrolyte and the internal resistance of the low tension battery of car networking intelligent terminal output.Wherein, Mobile intelligent terminal can be the intelligent movable equipment such as mobile phone.

Car networking intelligent terminal can be liquid-tight by the status information of low tension battery, charge parameter, electrolysis in the present embodiment Degree and internal resistance are sent to mobile intelligent terminal.It is also possible to start analysis and Control module 12 in battery charge initiation module, enter And the information that low tension battery is in into charged state when being charged to low tension battery is sent to mobile intelligent terminal.

It will be understood by those skilled in the art that above-mentioned low tension battery power management system also includes some other known knots Structure, such as processor, controller, memory, wherein, memory includes but is not limited to random access memory, flash memory, read-only storage Device, programmable read only memory, volatile memory, nonvolatile memory, serial storage, parallel storage or register Deng, processor includes but is not limited to CPLD/FPGA, DSP, arm processor, MIPS processors etc., in order to unnecessarily obscure this Disclosed embodiment, these known structures are not shown in FIG. 1.

It should be understood that the quantity of the modules in Fig. 1 is only schematical.According to actual needs, each module can be with With arbitrary quantity.

It will be understood by those skilled in the art that can adaptively be changed to the module in the system in embodiment And they are arranged in one or more equipment different from the embodiment.Can the module or unit in embodiment or Component is combined into a module or unit or component, and can be divided into multiple submodule or subelement or subgroup in addition Part.In addition at least some in such feature and/or process or unit exclude each other, any combinations can be used To all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and such disclosed any side All processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint right will Ask, make a summary and accompanying drawing) disclosed in each feature can be by offer is identical, equivalent or the alternative features of similar purpose are replaced.

Low tension battery power management system embodiment based on above-mentioned electric automobile, the embodiment of the present invention additionally provides one Plant electric automobile.Electric automobile can be including the electricity of the low tension battery described in electrokinetic cell and above-mentioned technical proposal in the present embodiment The power transfer module measured in management system, the low tension battery power management system can be connected with electrokinetic cell, for inciting somebody to action The high-tension current of electrokinetic cell output is converted to the available low-tension current of low tension battery.

The actual condition Self Adaptive Control power transfer module that electric automobile can be according to low tension battery in the present embodiment Charged to low tension battery, the state-of-charge of low tension battery is maintained in the range of default state-of-charge, prevent low pressure electric power storage Pond is overcharged or charge less.

Below in conjunction with the accompanying drawings, the low-pressure system to electric automobile in the embodiment of the present invention is specifically described.

Fig. 3 illustrates electric automobile low-pressure system in the present embodiment, as illustrated, electric automobile in the present embodiment Including power transfer module 21, low tension battery 22, electrokinetic cell 23, car networking intelligent terminal 24, middle control screen 25, intelligence electricity Pond sensor 26, entire car controller 27, display instrument 28 and low-voltage load 29.Entire car controller 27 passes through LIN buses and intelligence Battery sensor 26 is connected, by CAN respectively with power transfer module 21, car networking intelligent terminal 24, it is middle control screen 25, Display instrument 28 and low-voltage load 29 are connected.

Wherein, entire car controller 27 can include analysis and Control module 12, density of electrolyte monitoring module, internal resistance monitoring mould Block, power transfer module supervising device, load supplying control device, intelligent battery sensor 26 can include battery charge initiation Module, display instrument 28 can include meter display module.

The high-tension current that power transfer module 21 can export electrokinetic cell 23 is converted to low-tension current, then respectively to Low tension battery 22 charges, and is powered to low-voltage load 29.

Intelligent battery sensor 26 can gather the status information of low tension battery 21, and send it to entire car controller 27, while the battery charge initiation module in intelligent battery sensor 26 can also be when electric automobile be not actuated regularly to vehicle Controller 27 sends the first enabling signal so that entire car controller 27 can control power transfer module 21 to be filled to low tension battery Electricity.

Status information, the charging ginseng for the low tension battery that car networking intelligent terminal 24 can export entire car controller 27 Number, density of electrolyte and internal resistance are sent to mobile intelligent terminal, such as mobile phone, are easy to automobile user low with remote monitoring Press the working condition of battery 22.

Middle control screen 25 can show the warning information that entire car controller 27 is exported in the way of image and/or word.

Display instrument 28 can include being used to show the indicator lamp of the working condition of low tension battery, according to entire car controller The warning information of 27 outputs, and progress warning information is shown in the form of indicator lamp is turned on/off.Wherein, display instrument in the present embodiment Table 28 can not only show the warning information of low tension battery by turning on/off, can also be by turning on/off display power transfer module Warning information when 21 warning information and tertiary gradient low-voltage load is closed.

Fig. 5 illustrates the warning information type that electric automobile display instrument in the present embodiment is shown, as illustrated, That display power transfer module 21, low tension battery 22 and the can be turned on/off by indicator lamp is third for display instrument in the present embodiment Warning information when level low-voltage load is closed.It can specifically include：

The power transfer module supervising device of entire car controller 27 detects the setting output voltage of power transfer module 21 The inconsistent warning information with low-voltage system voltage in electric automobile；Detect power transfer module 21 and carry out self diagnosis feedback Fault level be forbid operation or promptly under electric corresponding catastrophe failure warning information；Detect the reality of power transfer module 21 Border mode of operation and the inconsistent warning information of default mode of operation；Detect the output voltage exception of power transfer module 21 Warning information；Detect the abnormal warning information of the signal transmission passage of power transfer module 21；Density of electrolyte monitoring module Detect the abnormal warning information of the density of electrolyte of low tension battery；Internal resistance monitoring module detects the internal resistance of low tension battery Too high warning information；Warning information when tertiary gradient low-voltage load is closed.

Below in conjunction with the accompanying drawings, to vehicle control unit controls power transfer module in electric automobile in the embodiment of the present invention to low The course of work that pressure battery carries out adaptive inductive charging is specifically described.

Fig. 4 illustrates the implementation stream that a kind of entire car controller in the present embodiment carries out low tension battery managing electric quantity Journey, as illustrated, low tension battery managing electric quantity can be carried out in the present embodiment as steps described below, be specially：

Step S201：Intelligent battery sensor 26 gathers the status information of low tension battery.

Step S202：Entire car controller 27 receives the status information of the collection of intelligent battery sensor 26 by LIN networks, so The signal condition of status information, the signal condition of status information and LIN networks is detected afterwards.

Step S203：When any one status information exception in status information, or the shape of any one in status information The signal condition of state information be disarmed state, or LIN networks signal condition be disarmed state when control power transfer module 21 charge according to default 4th charging voltage to low tension battery 22.

Step S204：When the signal condition of status information, the signal condition of status information and LIN networks is normal, control The automatic adjusument charging voltage of power transfer module 21 processed, preset charged is maintained by 22 state-of-charge of low tension battery In the range of.Wherein it is possible to control power transfer module 21 adaptively to adjust by the analysis and Control module 11 in entire car controller 27 Save charging voltage.

Intelligent battery sensor 26 can include battery charge initiation module in the present embodiment, below in conjunction with the accompanying drawings, to electricity The course of work of battery charge initiation module is illustrated in electrical automobile.

Fig. 8 illustrates the implementation that another entire car controller in the present embodiment carries out low tension battery managing electric quantity Flow, as illustrated, can be as steps described below to low tension battery when electric automobile is not actuated for a long time in the present embodiment Managing electric quantity is carried out, is specifically included：

Step S301：Electric automobile is not actuated for a long time, therefore entire car controller 27 is in a dormant state, i.e., do not control electricity Source modular converter 21 charges to low tension battery 22.Intelligent battery sensor 26 can in real time or periodic detection low tension battery 22 Voltage.

Step S302：Intelligent battery sensor 26 judges whether the voltage of low tension battery 22 is less than default feed voltage： If being monitored not less than continuation；If less than execution step S303.

Step S303：Intelligent battery sensor 26 sends the first enabling signal to entire car controller 27, to start vehicle control Device 27 processed.

Step S304：Entire car controller 27 restarts the controller and power transfer module 21 of electrokinetic cell 23 after starting.

Step S305：Control high-voltage relay closure after the controller of electrokinetic cell 23 starts, to power transfer module 21 Export high-tension current.

Step S306：Status information and default state-of-charge scope control of the entire car controller 27 according to low tension battery 22 Power transfer module 21 charges to low tension battery 22.

Step S307：Whether the state-of-charge of detection low tension battery 22 reaches default state-of-charge maximum：If not reaching To then return to step S306；If reaching execution step S308.

Step S308：Entire car controller 27 sends lower electricity request, entire car controller after high-voltage relay disconnects to controller 27 keep resting state, complete low tension battery charging.

Entire car controller 27 can include analysis and Control module in the present embodiment, below in conjunction with the accompanying drawings, in electric automobile The course of work that analysis and Control module carries out equalizaing charge to low tension battery is illustrated.

Fig. 9 illustrates the implementation that the entire car controller of another in the present embodiment carries out low tension battery managing electric quantity Flow, as illustrated, equalizaing charge can be carried out to each cell of low tension battery as steps described below in the present embodiment, Specifically include：

Step S401：Analysis and Control module 12 can control power transfer module 21 in entire car controller 27 in the present embodiment Equalizaing charge is carried out to each cell of low tension battery according to preset time, it is therefore desirable to which detection is waited to low tension battery Cell carry out equalizaing charge time whether reach preset time：Step S403 is performed if reaching；If not up to Perform step S402.

Step S402：Analysis and Control module 12 can be according to voltage analysis step, state-of-charge point in entire car controller 27 Analysis step control power transfer module 21 charges.

Step S403：The control of analysis and Control module 12 power transfer module 21 is defeated to low tension battery in entire car controller 27 Go out default 5th charging voltage.

Step S404：Detect the voltage change ratio of charging process mesolow battery whether close to 0：Returned if keeping off Return step S403；If the execution step S404 if.

Step S404：Complete charge.

Although in addition, it will be appreciated by those of skill in the art that some embodiments described herein include other embodiments In included some features rather than further feature, but the combination of the feature of be the same as Example does not mean in of the invention Within the scope of and form different embodiments.For example, in the following claims, times of embodiment claimed One of meaning mode can be used in any combination.

The present invention all parts embodiment can be realized with hardware, or with one or more processor run Software module realize, or realized with combinations thereof.It will be understood by those of skill in the art that can use in practice Microprocessor or digital signal processor (DSP) realize some in server according to embodiments of the present invention, client Or some or all functions of whole parts.The present invention be also implemented as perform method as described herein one Partly or completely equipment or program of device (for example, PC programs and PC program products).Such journey for realizing the present invention Sequence can be stored on PC computer-readable recording mediums, or can have the form of one or more signal.Such signal can be from Download and obtain on internet website, either provide or provided in any other form on carrier signal.

It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims, Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" is not excluded the presence of not Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such Element.The present invention can be by means of including the hardware of some different elements and being realized by means of properly programmed PC. If in the unit claim for listing equipment for drying, several in these devices can be come specific by same hardware branch Embody.The use of word first, second, and third does not indicate that any order.These words can be construed to title.

So far, combined preferred embodiment shown in the drawings describes technical scheme, still, this area Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these embodiments.Without departing from this On the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to correlation technique feature, these Technical scheme after changing or replacing it is fallen within protection scope of the present invention.

Claims

1. the low tension battery power management system of a kind of electric automobile, it is characterised in that the system is joined including battery status Number acquisition module and analysis and Control module；

2. the low tension battery power management system of electric automobile according to claim 1, it is characterised in that the low pressure The status information of battery includes state-of-charge；

3. the low tension battery power management system of electric automobile according to claim 2, it is characterised in that the system Also include the first charging voltage preset value and revise module, be configured to detect the real time charging electric current of the low tension battery, and according to According to the real time charging electric current and the deviation of preset charged current maxima, default first charging voltage is corrected.

4. the low tension battery power management system of electric automobile according to claim 2, it is characterised in that the low pressure The status information of battery also includes voltage；

5. the low tension battery power management system of electric automobile according to claim 4, it is characterised in that the analysis The analysis of the charge parameter of control module mesolow battery also includes waiting equalizaing charge time series analysis step；It is described to wait equal Weighing apparatus charging interval analytical procedure is arranged at before the voltage analysis step of the low tension battery；The wait equalizaing charge time Analytical procedure includes：

6. the low tension battery power management system of electric automobile according to claim 5, it is characterised in that the analysis The analysis of the charge parameter of control module mesolow battery also includes the status information anomaly analysis step of low tension battery；Institute The status information anomaly analysis step for stating low tension battery is arranged at before the wait equalizaing charge time series analysis step；It is described The status information anomaly analysis step of low tension battery includes：

If the status information exception and T of low tension battery_ab≥T_thWhen, the charging voltage of low tension battery charging is filled for the default 4th Piezoelectric voltage；Default 4th charging voltage is more than the rated voltage of low tension battery and less than default 3rd charging voltage；

7. the low tension battery power management system of electric automobile according to claim 6, it is characterised in that the state Information includes voltage, temperature and the electric current of low tension battery；The abnormal determination methods of the status information are：Work as low tension battery State-of-charge or temperature or voltage or electric current when being in corresponding preset data abnormal ranges, then be judged as low tension battery Battery parameter it is abnormal.

8. the low tension battery power management system of the electric automobile according to any one of claim 1-7, its feature exists In the system also includes battery status parameter harvester, is configured to the collection of battery status parameter.

9. the low tension battery power management system of electric automobile according to claim 8, it is characterised in that described electricity Pond state parameter harvester is intelligent battery sensor.

10. the low tension battery power management system of the electric automobile according to any one of claim 1-7, its feature exists In the system also includes battery charge initiation module；