CN110311183A - A kind of charge and discharge protecting method and device of lithium battery group - Google Patents
A kind of charge and discharge protecting method and device of lithium battery group Download PDFInfo
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- CN110311183A CN110311183A CN201910594801.8A CN201910594801A CN110311183A CN 110311183 A CN110311183 A CN 110311183A CN 201910594801 A CN201910594801 A CN 201910594801A CN 110311183 A CN110311183 A CN 110311183A
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 259
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 257
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 230000005611 electricity Effects 0.000 claims description 26
- 230000004913 activation Effects 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 19
- 230000007958 sleep Effects 0.000 claims description 17
- 230000003584 silencer Effects 0.000 claims description 7
- 239000002828 fuel tank Substances 0.000 claims description 5
- 230000008450 motivation Effects 0.000 claims description 5
- -1 silencer Substances 0.000 claims description 2
- 238000013507 mapping Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 12
- 229910001416 lithium ion Inorganic materials 0.000 description 12
- 230000002265 prevention Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000003213 activating effect Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- NCZYUKGXRHBAHE-UHFFFAOYSA-K [Li+].P(=O)([O-])([O-])[O-].[Fe+2].[Li+] Chemical compound [Li+].P(=O)([O-])([O-])[O-].[Fe+2].[Li+] NCZYUKGXRHBAHE-UHFFFAOYSA-K 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000001934 delay Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- QPHXCDBDXANFAU-UHFFFAOYSA-N [Li].[Li].[Fe] Chemical compound [Li].[Li].[Fe] QPHXCDBDXANFAU-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H02J7/0077—
-
- H02J7/0088—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The charge and discharge protecting method of a kind of lithium battery group provided herein, comprising: whether detection environment temperature is greater than default low temperature point；If environment temperature is greater than default low temperature point, judge whether battery terminal voltage is less than preset charging setting voltage；If battery terminal voltage is less than charging setting voltage, the numerical values recited according to battery terminal voltage executes corresponding charge mode, until battery terminal voltage is equal to charging setting voltage.For this method when battery terminal voltage is less than charging setting voltage, the numerical values recited according to battery terminal voltage executes corresponding charge mode.It is understood that there is mapping relations between the numerical values recited and charge mode of battery terminal voltage, the numerical values recited variation so that with battery terminal voltage executes corresponding charge mode, can more safely carry out the charging of lithium battery group.The application also provides charging and discharging protection device, lithium battery pack management system, engine and the engine driving type working machine of a kind of lithium battery group, all has above-mentioned beneficial effect.
Description
Technical field
This application involves engine and its working machine field of driving, in particular to a kind of charge and discharge protecting of lithium battery group
Method, a kind of charging and discharging protection device of lithium battery group, a kind of lithium battery pack management system, a kind of engine, a kind of engine
Driving working machine.
Background technique
Traditional internal combustion engine type engine, especially put-put, Starting mode usually have hand pull starting-up or electricity to open
Flowing mode, correspondingly, such engine application in the working machine driven for example generator, grass trimmer, water pump assembly, snowplough,
Whens ramming machine etc., starting is generally also hand pull starting-up or electrically activates.As the power supply electrically activated, conventional power source is stored using plumbic acid
Battery, but since lead-acid battery self discharge amount is big, industrial trend is had become with emerging lithium ion battery substitution lead-acid battery.
Lithium ion battery, also referred to as serondary lithium battery or lithium battery have high storage energy density, long service life, specified
Voltage is high, has that high power endurance, self-discharge rate are very low, light-weight, high/low temperature is adaptable, environmentally protective, production is basic
The many merits such as water are not consumed, thus application range is extremely extensive at present.But lithium ion battery (has generation there is also safety is poor
The danger of explosion), use condition restricted (high/low temperature using dangerous big), need protection circuit (preventing super-charge super-discharge electric) etc. and lack
Point.When it is applied on engine and its working machine product of driving, since working environment is severe (such as high temperature, low
Under the conditions of temperature), the security performance requirement of lithium ion battery itself in addition, peace of the lithium ion battery on engine and its working machine
Full application just becomes an effective demand.
Therefore, the technology that the charging of lithium battery group is those skilled in the art's urgent need to resolve how is more safely carried out to ask
Topic.
Summary of the invention
The purpose of the application is to provide a kind of charge and discharge protecting method of lithium battery group, a kind of charge and discharge of lithium battery group are protected
Protection unit, a kind of lithium battery pack management system, a kind of engine, a kind of engine driving type working machine, can be more safely
Carry out the charging of lithium battery group.
In order to solve the above technical problems, the application provides a kind of charge and discharge protecting method of lithium battery group, comprising:
Whether detection environment temperature is greater than default low temperature point；
If the environment temperature is greater than the default low temperature point, judge whether battery terminal voltage is less than preset charging and sets
Constant voltage；
If the battery terminal voltage, which is less than the charging, sets voltage, the numerical values recited according to the battery terminal voltage is held
The corresponding charge mode of row, until the battery terminal voltage is equal to the charging and sets voltage.
Preferably, if the battery terminal voltage is less than the charging and sets voltage, according to the battery terminal voltage
Numerical values recited execute corresponding charge mode, until the battery terminal voltage is equal to charging setting voltage, comprising:
If the battery terminal voltage, which is less than the charging, sets voltage, it is default to judge whether the battery terminal voltage is less than
Battery undervoltage setting value；Wherein, the battery undervoltage setting value is less than charging setting voltage；
If the battery terminal voltage is less than the battery undervoltage setting value, battery undervoltage charge mode is executed, with default
Micro-current is to lithium battery group charging until the battery terminal voltage is not less than the battery undervoltage setting value；
If the battery terminal voltage is not less than the battery undervoltage setting value, monitoring temperature charge mode is executed, until
The battery terminal voltage is equal to the charging and sets voltage.
Preferably, it if the battery terminal voltage is not less than the battery undervoltage setting value, executes monitoring temperature and fills
Power mode, until the battery terminal voltage is equal to the charging and sets voltage, comprising:
If the battery terminal voltage is not less than the battery undervoltage setting value, it is pre- to judge whether the environment temperature is less than
If often filling warm spot；Wherein, the default warm spot that often fills is greater than the default low temperature point；
If the environment temperature often fills warm spot not less than described preset, charged with presetting normal electric current to the lithium battery group
Until the battery terminal voltage is equal to the charging and sets voltage；
If the environment temperature, which is less than described preset, often fills warm spot, charged with default low current to the lithium battery group straight
It is equal to the charging to the battery terminal voltage and sets voltage.
Preferably, the charge and discharge protecting method of the lithium battery group further include:
Whether detection battery core end voltage is greater than the battery undervoltage setting value；Wherein, battery core end voltage is the lithium
The voltage at lithium cell both ends in battery pack；
If battery core end voltage is not more than the battery undervoltage setting value, after postponing default first time period, hold
Row cut-off discharge operation is until battery core end voltage is greater than the battery undervoltage setting value.
Preferably, the charge and discharge protecting method of the lithium battery group further include:
Discharge current is detected, and judges the discharge current and default first over-current protection point, default second overcurrent
Protect the size relation of point；Wherein, default first over-current protection point is less than default second over-current protection point；
If default first over-current protection point is less than or equal to the discharge current, and the discharge current is less than described
Default second over-current protection point executes the cut-off discharge operation until detecting then after postponing default second time period
Battery-end is non-loaded；
If the discharge current is more than or equal to default second over-current protection point, postponing the default third period
Afterwards, the cut-off discharge operation is executed until detecting that the battery-end is non-loaded.
Preferably, the charge and discharge protecting method of the lithium battery group further include:
Battery core temperature is detected, and judges whether the battery core temperature is less than preset temperature；
If the battery core temperature is not less than the preset temperature, the cut-off discharge operation is executed until the battery core temperature
Degree is less than the preset temperature.
Preferably, the charge and discharge protecting method of the lithium battery group further include:
Load resistor value is detected, and judges whether the load resistor value is less than default activation resistance critical value；
If the load resistor value is less than the default activation resistance critical value, activation protection board work is carried out；
If the load resistor value is not less than the default activation resistance critical value, postponing default 4th period
Afterwards, low power sleep mode is executed.
The application also provides a kind of charging and discharging protection device of lithium battery group, including charger, and the charger is provided with
Environment temperature detection module, for detecting whether environment temperature is greater than default low temperature point；
Voltage judgment module judges that battery terminal voltage is if being greater than the default low temperature point for the environment temperature
It is no to be less than preset charging setting voltage；
Charge mode execution module, if being less than the charging for the battery terminal voltage sets voltage, according to described in
The numerical values recited of battery terminal voltage executes corresponding charge mode, until the battery terminal voltage is equal to charging setting electricity
Pressure.
Preferably, the charge mode execution module, comprising:
Battery terminal voltage judging unit judges institute if being less than the charging for the battery terminal voltage sets voltage
State whether battery terminal voltage is less than preset battery undervoltage setting value；Wherein, the battery undervoltage setting value is less than the charging
Set voltage；
Battery undervoltage charge mode execution unit, if being less than the battery undervoltage setting value for the battery terminal voltage,
Battery undervoltage charge mode is then executed, with default micro-current to lithium battery group charging until the battery terminal voltage is not less than described
Battery undervoltage setting value；
Monitoring temperature charge mode execution unit, if being set for the battery terminal voltage not less than the battery undervoltage
Value, then execute monitoring temperature charge mode, until the battery terminal voltage is equal to the charging and sets voltage.
Preferably, the monitoring temperature charge mode execution unit, comprising:
Environment temperature judgment sub-unit is sentenced if being not less than the battery undervoltage setting value for the battery terminal voltage
Whether the environment temperature of breaking, which is less than to preset, is often filled warm spot；Wherein, the default warm spot that often fills is greater than the default low temperature point；
Normal electric current charging subelement, if often warm spot is filled not less than described preset for the environment temperature, with default normal
Electric current is to lithium battery group charging until the battery terminal voltage is equal to the charging and sets voltage；
Low current charge subelement, if being less than described preset for the environment temperature often fills warm spot, to preset small electricity
Stream is to lithium battery group charging until the battery terminal voltage is equal to the charging and sets voltage.
It preferably, further include the protection board being set in lithium battery group, the protection board is provided with
Battery core terminal voltage detecting module, for detecting whether battery core end voltage is greater than the battery undervoltage setting value；Wherein,
Battery core end voltage is the voltage at lithium cell both ends in the lithium battery group；
First cut-off discharge operation execution module, if being set for battery core end voltage no more than the battery undervoltage
Value executes cut-off discharge operation until battery core end voltage is owed greater than the battery then after postponing default first time period
Press setting value.
Preferably, the protection board further include:
Discharge current detection module for detecting discharge current, and judges the discharge current and default first overcurrent
Protect the size relation of point, default second over-current protection point；Wherein, default first over-current protection point is less than described pre-
If the second over-current protection point；
Second cut-off discharge operation execution module, if being less than or equal to described put for default first over-current protection point
Electric current, and the discharge current is less than default second over-current protection point and holds then after postponing default second time period
The row cut-off discharge operation is until detect that battery-end is non-loaded；
Third ends discharge operation execution module, if being more than or equal to default second overcurrent for the discharge current
Point is protected, then after postponing the default third period, executes the cut-off discharge operation until detecting the battery-end without negative
It carries.
Preferably, the protection board further include:
Battery core temperature detecting module for detecting battery core temperature, and judges whether the battery core temperature is less than preset temperature；
4th cut-off discharge operation execution module executes if being not less than the preset temperature for the battery core temperature
The cut-off discharge operation is until the battery core temperature is less than the preset temperature.
Preferably, the protection board further include:
Load resistor value detection module, for detecting load resistor value, and it is pre- to judge whether the load resistor value is less than
If activating resistance critical value；
Protection board active module carries out if being less than the default activation resistance critical value for the load resistor value
Activate protection board work；
Low power sleep mode execution module, if critical not less than the default activation resistance for the load resistor value
Value executes low power sleep mode then after postponing default 4th period.
The application also provides a kind of lithium battery pack management system, comprising:
Charging and discharging protection device, charge power supply and the application system of lithium battery group described above.
The application also provides a kind of engine, comprising: engine body, silencer, air filter, cooling fan, is led at fuel tank
Fan housing and lithium battery pack management system described above.
Preferably, the charger in the lithium battery pack management system and/or lithium battery group are installed on the wind scooper
Inside and or outside.
The application also provides a kind of engine driving type working machine, comprising: rack；The above-mentioned hair being set in the rack
Motivation and by engine-driven generator；Lithium battery group and charger in the lithium battery management system of the engine
It is set on the engine driving type working machine, also, at least described lithium battery group in the lithium battery and the charger
In the cooled region of cooling fan in the engine.
Preferably, the lithium battery group and/or the charger, be set to the rack bottom plate or the engine or
On one of the generator or the shell for surrounding engine driving type working machine set by the rack.
The charge and discharge protecting method of a kind of lithium battery group provided herein, comprising: whether detection environment temperature is greater than
Default low temperature point；If the environment temperature is greater than the default low temperature point, judge whether battery terminal voltage is less than preset fill
Electricity setting voltage；If the battery terminal voltage, which is less than the charging, sets voltage, the numerical value according to the battery terminal voltage is big
It is small to execute corresponding charge mode, until the battery terminal voltage is equal to the charging and sets voltage.
For this method when battery terminal voltage is less than charging setting voltage, the numerical values recited according to battery terminal voltage executes correspondence
Charge mode, until the battery terminal voltage be equal to the charging setting voltage.It is understood that the number of battery terminal voltage
It is worth between size and charge mode the numerical values recited variation there is mapping relations, so that with battery terminal voltage and executes corresponding fill
Power mode can more safely carry out the charging of lithium battery group.The application also provides a kind of charge and discharge protecting of lithium battery group
Device, lithium battery pack management system, engine and engine driving type working machine, all have above-mentioned beneficial effect, herein no longer
It repeats.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of the charge and discharge protecting method of lithium battery group provided by the embodiment of the present application；
Fig. 2 is a kind of lithium battery pack management system structural schematic diagram provided by the embodiment of the present application；
Fig. 3 is a kind of charger construction schematic diagram provided by the embodiment of the present application；
Fig. 4 is a kind of protection board structural schematic diagram provided by the embodiment of the present application；
Fig. 5 electrically activates schematic illustration for a kind of engine provided by the embodiment of the present application；
Fig. 6 is a kind of structural block diagram of the charging and discharging protection device of lithium battery group provided by the embodiment of the present application；
Fig. 7 is a kind of vertical shaft generator stereoscopic schematic diagram provided by the embodiment of the present application；
Fig. 8 is a kind of lithium battery group stereoscopic schematic diagram provided by the embodiment of the present application；
Fig. 9 is a kind of engine generator stereoscopic schematic diagram provided by the embodiment of the present application；
Figure 10 is a kind of lithium battery group stereoscopic schematic diagram provided by the embodiment of the present application；
Figure 11 is a kind of charger stereoscopic schematic diagram provided by the embodiment of the present application；
Figure 12 is a kind of charger stereoscopic schematic diagram of another angle provided by the embodiment of the present application.
Specific embodiment
The core of the application is to provide a kind of charge and discharge protecting method of lithium battery group, can more safely carry out lithium electricity
The charging of pond group.Another core of the application is to provide a kind of charging and discharging protection device of lithium battery group, lithium battery group management system
System, engine and engine driving type working machine.
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Lithium ion battery, also referred to as serondary lithium battery or lithium battery have high storage energy density, long service life, specified
Voltage is high, has that high power endurance, self-discharge rate are very low, light-weight, high/low temperature is adaptable, environmentally protective, production is basic
The many merits such as water are not consumed, thus application range is extremely extensive at present.But lithium ion battery (has generation there is also safety is poor
The danger of explosion), use condition restricted (high/low temperature using dangerous big), need protection circuit (preventing super-charge super-discharge electric) etc. and lack
Point.When it is applied on engine and its working machine product of driving, since working environment is severe (such as high temperature, low
Under the conditions of temperature), the security performance requirement of lithium ion battery itself in addition, peace of the lithium ion battery on engine and its working machine
Full application just becomes an effective demand.
A kind of charge and discharge protecting method of lithium battery group provided by the present application can more safely carry out lithium battery group
Charging, it is specific referring to FIG. 1, Fig. 1 is a kind of stream of the charge and discharge protecting method of lithium battery group provided by the embodiment of the present application
The charge and discharge protecting method of Cheng Tu, the lithium battery group specifically include:
Whether S101, detection environment temperature are greater than default low temperature point；
If S102, environment temperature are greater than default low temperature point, judge whether battery terminal voltage is less than preset charging setting
Voltage；
If S103, battery terminal voltage are less than charging setting voltage, the numerical values recited according to battery terminal voltage executes correspondence
Charge mode, until battery terminal voltage be equal to charging setting voltage.
Set in the present embodiment detection environment temperature as T, default low temperature point be T1, battery terminal voltage U, charging setting voltage
For U1.The present invention provides a kind of engine, engine generator is electrically activated with lithium battery pack management system, such as Fig. 2 institute
Show, Fig. 2 is a kind of lithium battery pack management system structural schematic diagram provided by the embodiment of the present application, comprising: charge power supply, by sending out
Motivation or engine generator itself provide；Lithium battery group generally includes protection board and lithium cell；For the lithium battery group
The charger of charging；Application system mainly includes providing the starting motor that power supply is driven by lithium battery group；Wherein, it charges
Device has first processor, environment temperature detection unit, battery terminal voltage detection unit, as shown in figure 3, Fig. 3 is that the application is real
Apply a kind of charger construction schematic diagram provided by example, the first processor according to detect environment temperature, battery terminal voltage,
It identifies, judge in conjunction with preset condition, controlling charger and charge in different modalities at different conditions, first processor is set
It is set to: when each initial power-on work, detecting environment temperature T:
As T≤setting low temperature point T1, charger cannot charge without output；
As T > T1, charger has output, at this time detection and comparative cell end voltage U: charging in U=and sets voltage U1
When, not charge mode is executed, to lithium battery group without charging；In U < charging setting voltage U1, according to battery terminal voltage U's
Numerical values recited executes corresponding charge mode, until battery terminal voltage U is equal to charging setting voltage U1.
The charge and discharge protecting method of lithium battery group provided in this embodiment battery terminal voltage be less than charging setting voltage when,
Numerical values recited according to battery terminal voltage executes corresponding charge mode, until the battery terminal voltage is set equal to the charging
Voltage.It is understood that between the numerical values recited and charge mode of battery terminal voltage, there is mapping relations, so that with battery
It holds the numerical values recited variation of voltage to execute corresponding charge mode, can more safely carry out the charging of lithium battery group.
In one embodiment, if above-mentioned battery terminal voltage is less than charging setting voltage, the number according to battery terminal voltage
It is worth size and executes corresponding charge mode, until battery terminal voltage is equal to charging setting voltage, generally includes: if battery terminal voltage
Voltage is set less than charging, then judges whether battery terminal voltage is less than preset battery undervoltage setting value；Wherein, battery undervoltage is set
Definite value is less than charging setting voltage；If battery terminal voltage is less than battery undervoltage setting value, battery undervoltage charge mode is executed, with
Default micro-current is to lithium battery group charging until battery terminal voltage is not less than battery undervoltage setting value；If battery terminal voltage is not less than
Battery undervoltage setting value then executes monitoring temperature charge mode, until battery terminal voltage is equal to charging setting voltage.
Set in the present embodiment battery undervoltage setting value as U0, default micro-current be I1.In U < battery undervoltage setting value U0
When, execute battery undervoltage charge mode, charged with default micro-current I1 to lithium battery group, until the charging voltage value that detects i.e.
When battery terminal voltage U >=U0, terminates battery undervoltage charge mode and be transferred to monitoring temperature charge mode；In U1 > U >=U0, hold
Trip temperature monitors charge mode.
In one embodiment, it if above-mentioned battery terminal voltage is not less than battery undervoltage setting value, executes monitoring temperature and fills
Power mode, until battery terminal voltage is equal to charging setting voltage, comprising: if battery terminal voltage is not less than battery undervoltage setting value,
Then judge whether environment temperature is less than to preset and often fills warm spot；Wherein, it presets and often fills warm spot greater than default low temperature point；If environment temperature
Warm spot often is filled not less than default, then to preset normal electric current to lithium battery group charging until battery terminal voltage is equal to charging setting electricity
Pressure；If environment temperature, which is less than to preset, often fills warm spot, with default low current to lithium battery group charging until battery terminal voltage is equal to
Charging setting voltage.
Set in the present embodiment it is default often fill warm spot as T2, preset that normal electric current is I2, default low current is I3.As T≤T1,
Charge closing；When warm spot T2 is often filled in T >=setting, charged with presetting normal electric current I2 to lithium battery group；As T1 < T < T2, with
Default low current I3 charges to lithium battery group；When the charging voltage value i.e. battery terminal voltage U=U1 detected, charging knot
Beam.
On the basis of the above embodiments, lithium battery pack management system is preferred in the present embodiment are as follows: lithium battery group is by 4 section phosphorus
Sour iron lithium lithium battery group is at charging setting voltage U1 is set as 14.8v, and battery undervoltage setting value U0 is 10v；Setting low temperature point T1 is set
It is -10 DEG C, often filling warm spot T2 is set as 0 DEG C for setting；Default micro-current I1 is set as 0.1C, and default often charging stream I2 is set as 0.5C, in advance
If low current I3 is set as 0.2C.
Above-described embodiment has the advantage that: 1, charging operations intelligence, automatic progress, in engine or its working machine (example
Such as engine generator) operation when, can detect automatically, compare relevant parameter and according to relevant parameter autonomous control, turn
The operation of commutation inductive charging；When engine or its working machine are not run, it is zero that charger, which connect quiescent dissipation with lithium battery group, no
Consume battery capacity.2, it individually charges without taking out lithium battery group.Lithium ion on engine and its working machine in the prior art
Battery, be typically designed to can the easily demolition, installation from engine and its working machine, lithium ion battery charging needs individually remove
It is charged with special charger, is refilled on corresponding product after charging complete, it is relatively cumbersome in operation sequence, cumbersome；?
Have and charged with engine-driven charging system to lithium ion battery, but its charge function is single, it is difficult to which reply is such as
The problems such as charging temperature, electric current, voltage control.3, environmental temperature monitoring manages entire charging process in scheme, makes to fill
Electric control is more fine: when initial power-on works, as T≤T1, control charger is without output state, cannot charge；As T >
When T1, control charger is to have output state, can carry out charging operations, but if U=U1, executes not charge mode；If U <
U0 executes battery undervoltage charge mode, is charged with default micro-current I1, until its not under-voltage (i.e. U >=U0) is transferred to temperature
Degree monitoring charge mode；If U1 > U >=U0, monitoring temperature charge mode is executed, distinguishes situation intelligent set are as follows: is low setting
Charge closing (i.e. when T≤T1) in warm situation, in the case where setting charges normal temperature conditions to preset normal electric current (i.e. when T >=T2)
(i.e. preset normal charging current) I2 charging, alternatively, environment temperature between setting low temperature, charge normal feelings between temperature
With default low current I3 charging (i.e. when T1 < T < T2) under condition.That is, entire charging control process, environment temperature T and electricity
Pond end voltage U is two determinants, and environment temperature detection detects and run through prior to battery terminal voltage and entirely controlled
Journey；And charging process distinguished compared with traditional technology it is thinner, be divided into cannot charge (charger without output state), charge closing,
With default micro-current I1, normal electric current I2, default low current I3 charging totally five kinds of situations are preset, and the control of this five kinds of situations is equal
It is that intelligence is automatic to carry out.
In the practical application of above-described embodiment, lithium battery group is usually by an at least section lithium battery group at (if it is by more
If section composition, series connection is taken between multisection lithium battery), charging setting voltage (the i.e. high pressure of lithium battery group safe charging
Value) U1, battery undervoltage setting value (i.e. the low voltage value of lithium battery group safe-discharge) U0 can because selection lithium battery type, composition lithium
The difference of the lithium battery quantity (joint number) of battery pack and it is different.Therefore, charging setting voltage U1 should meet following range: every section lithium
The rated charging voltage of battery × joint number n≤U1≤every section lithium battery highest safe charge voltage × joint number n, within the scope of this
Numerical value includes end value, can be used as charging setting voltage value；Battery undervoltage setting value U0, setting should meet following formula: U0
Safe-discharge low voltage value × joint number n of=every section lithium battery.In embodiment, lithium battery uses lithium iron phosphate lithium battery, every section
Rated charging voltage is 3.6v, and every section highest safe charge voltage is 3.8v, and every section safe-discharge low voltage value is 2.5v, using 4
It saves lithium battery and forms lithium battery group, thus: it includes end value as between 14.4v to 15.2v that charging, which sets voltage U1 value range, real
Applying value in example is 14.8v；And battery undervoltage setting value U0 is set as 10v.
In addition, in the practical application of above-described embodiment, low temperature point T1 and often warm spot (temperature spot charged normal) is filled
The setting of T2 considers different types of lithium battery characteristic and in conjunction with working environment mainly to carry out, and is distinguished with this and defines lithium electricity
The operating ambient temperature T of pond group is setting low temperature, setting charges normal temperature and temperature is different to take between the above two
Charging strategy.Meanwhile the charging of current limit corresponding to different charging strategies is (i.e. with default micro-current I1, default often charging
I2 or default low current I3 charging is flowed, except the situation of charge closing), the setting of current limit be also comprehensively consider it is not of the same race
The lithium battery characteristic of class simultaneously carries out different settings in conjunction with working environment, and a not definite value.In the present embodiment, set low
The value of warm spot T1 is -10 DEG C, sets and often fills warm spot T2 as 0 DEG C, and presetting micro-current I1 is 0.1C (the specified appearance of " C " expression battery
Amount, such as the lithium battery of 1.6AH, C=1.6, if charging current is 1C, then charging current is 1.6A, similarly hereinafter), preset often charging stream
I2 is set as 0.5C, and default low current I3 is set as 0.2C.Although it should be noted that clearly setting low temperature point in the present embodiment
T1, the value for often filling warm spot T2, default micro-current I1, default often charging stream I2 and default low current I3, but should not be construed as this
The embodiment of invention is only limitted to these setting values, and according to different situations, it also has other setting values unlike this, should all
Within protection scope of the present invention.
It should be noted " executing not charge mode " described in the present invention, " charging terminates " refer to such one
Kind state, i.e., in the case where charger has output, charging current is almost nil.It is different from " charging described in the present invention
Device cannot charge without output ", the state of " charge closing ", this two states is state of the charger in no output,
Do not generate charging current.
Based on the above embodiment, it in the present embodiment usually can also include: whether detection battery core end voltage is owed greater than battery
Press setting value；Wherein, battery core end voltage is the voltage at lithium cell both ends in lithium battery group；If battery core end voltage is owed no more than battery
Setting value is pressed, then after postponing default first time period, executes cut-off discharge operation until battery core end voltage is greater than battery undervoltage
Setting value.
The present embodiment set battery core end voltage as U ', default first time period be t1, the lithium battery group management of the present embodiment
In system, lithium battery group has lithium cell and protection board；Lithium cell by an at least section lithium battery group at；Protection board is configured in lithium
It is protected in battery pack use process；Wherein, protection board has second processor, delays time to control unit, battery core end electricity
Detection unit is pressed, furthermore according to being also provided with excessive current detection unit, load detecting unit, battery core in actual demand protection board
Temperature detecting unit and sleep pattern converting unit, specifically refer to Fig. 4, and Fig. 4 is a kind of guarantor provided by the embodiment of the present application
Guard board structure schematic diagram.Second processor is arranged to: as the battery core end voltage U '≤battery undervoltage setting value U0 detected,
It is set as after postponing first time period t1, lithium battery group executes cut-off electric discharge, when the U ' > U0 detected, releases electric discharge
Protection.Lithium cell can be specifically made of 4 section lithium iron phosphate lithium batteries in the present embodiment, and battery undervoltage setting value U0 is set as 10v, be prolonged
Slow first time period t1 is set as 3s.
The present embodiment has the advantage that: in general, lithium battery group discharge performance can reduce under cryogenic conditions, for protection electricity
Core can avoid brownout when its electric discharge (i.e. battery core total voltage must not be lower than battery undervoltage setting value).But in actual use,
It still needs to start motor using lithium battery group as power supply at low temperatures, this just forms conflict.What is be arranged in the design prolongs
When control unit, protection battery core (i.e. because triggering battery under-voltage protection, lithium battery group terminate electric discharge) is not only taken into account, but also in certain time
In section t1 starting motor may normally started, though starting motor cannot be made normally to start and can preheat to battery
And its discharge performance is improved, to be conducive to its normal use next time.In practical application, as previously mentioned, battery undervoltage is set
Value U0 by lithium battery type and form lithium battery group joint number determine, setting should meet following formula: the every section lithium cell of U0=
Safe-discharge low voltage value × joint number n.In the present embodiment, because forming lithium battery group using 4 section LiFePO4 lithium cells, battery is owed
Pressure setting value U0 is set as 10v.And postpone the setting of first time period t1, mainly by electrically activating when habit closure switch time and
The under-voltage electric discharge tolerance of lithium battery group determines, can set t1 >=2s in principle, it includes end that optional range, which is set as 2s to 6s,
Value, the present embodiment is preferably 3s.Delays time to control therein, be by capacitor set by processor, using its charge and discharge when
Between realize (other schemes of the invention are related to delays time to control, and principle is identical with this)；And battery undervoltage discharge prevention is
Complete in this way: after protection board work, lithium battery group starts to discharge, as U '≤U0 and the t1 that holds time (being 3s in embodiment)
Afterwards, electric discharge driving output (i.e. MOS switch) is pulled to low level by high level, and protection board is made to disconnect discharge loop, and lithium battery group is held
Row cut-off electric discharge, realizes battery undervoltage discharge prevention；When U ' > U0, MOS switch becomes high level from low level at this time, from
And release under-voltage discharge prevention.It should be noted that so-called battery core end voltage U ', refers to total electricity that multisection lithium battery is together in series
It presses (if lithium battery group is only made of single lithium battery, for the voltage of single lithium battery), it is different from institute in charge protection
The battery terminal voltage U (the positive and negative terminal voltage of i.e. one complete lithium battery group) said.Because the protection board in lithium battery group have power consumption,
There is voltage drop, necessarily consumes certain electric energy of battery core, thus battery terminal voltage U outline is lower than battery core end voltage U '.
Based on the above embodiment, usually can also include: detection discharge current in the present embodiment, and judge discharge current with
The size relation of default first over-current protection point, default second over-current protection point；Wherein, the first over-current protection point is preset
Less than default second over-current protection point；If default first over-current protection point is less than or equal to discharge current, and discharge current is small
In default second over-current protection point, then after postponing default second time period, cut-off discharge operation is executed until detecting electricity
Chi Duan is non-loaded；If discharge current is more than or equal to default second over-current protection point, after postponing the default third period, hold
Row cut-off discharge operation is until detect that battery-end is non-loaded.
The present embodiment sets that discharge current as I, default first over-current protection point is I4, default second over-current protection point is
I5, default second time period are t2, the default third period is t3.In the lithium battery pack management system of the present embodiment, protection board
Also there is excessive current detection unit, load detecting unit, second processor is arranged to: when the first over-current protection point I4≤inspection
When discharge current I < the second over-current protection point I5 measured, it is set as after postponing second time period t2, lithium battery group executes
Cut-off electric discharge releases discharge prevention when load detecting unit detects that battery-end is non-loaded；As I >=I5, it is set as
After postponing third time period t 3, lithium battery group executes cut-off electric discharge, when load detecting unit detects that battery-end is non-loaded,
Release discharge prevention.In the present solution, by the detection of setting overcurrent and load detecting, in conjunction with delays time to control, I4≤I < I5's
In the case of be delayed t2, not only improve starting motor safety, normal starting: starting motor has starting current peak value on startup, past
Toward be higher than starting motor rotation blockage current value, hold time in several hundred milliseconds, and the t2 time commonly greater than the time, so passing through
Delay t2 can will not trigger overcurrent discharge prevention by peak point current in electric motor starting, normally start to be conducive to motor；Again
It can break down when stall starting motor, discharge prevention be triggered through delay t2, to can effectively avoid lithium battery group because holding
Continue heavy-current discharge and damages battery or motor.And the t3 triggering electric discharge that is delayed in the case where I >=I5 (in the case where i.e. short-circuit)
Protection, be conducive to lithium cell service life and lithium battery group using safe (such as avoiding exploding).In practical application, the first mistake
Current protection point I4, the second over-current protection point I5 are the starting motors in the lithium battery group matching suitable power of certain capacity
In the case of, it breaks down and stall when starting motor, battery last is avoided to be large current discharge and damage battery and motor Shi Erjin
Row setting.The present embodiment forms lithium battery group using 4 section lithium iron phosphate lithium batteries, and the first over-current protection point I4 is set as 50C,
Second over-current protection point I5 is set as 180C, and delay second time period t2 is set as 1s, and delay third time period t 3 is set as in principle
T3≤3ms, can be 1 to 3ms includes end value, and value is 3ms in embodiment.Similarly, although to the first mistake in the present embodiment
Current protection point I4, the second over-current protection point I5, delay second time period t2, postpone third time period t 3 value carried out it is bright
Really setting, but it is not limited the scope of protection of the present invention, and in other application, corresponding each value may have different setting values,
It should all be within protection scope of the present invention.The control process of this programme are as follows: after protection board work, lithium battery group starts to discharge,
As I4≤I < I5, after the t2 that holds time (being 1s in embodiment), alternatively, as I >=I5, the t3 that holds time (is in embodiment
After 3ms), MOS switch (i.e. electric discharge driving output) is pulled to low level by high level, and protection board disconnects discharge loop, realized electricity
Stream protection, at this point, lithium battery group executes cut-off electric discharge；Once overcurrent, which occurs, ends discharge prevention, only load detecting unit is examined
Measure battery-end it is non-loaded when (be specifically described below), MOS switch becomes high level from low level at this time, to release electricity
Banish electric protection.Engine electrically activates principle as shown in figure 5, Fig. 5 is that one kind provided by the embodiment of the present application starts electromechanics to open
Dynamic schematic illustration.In Fig. 5 43 be generator (magneto), 20 be charger, 30 be lithium battery group, 44 be starting motor, 47
For electric switch.
Based on the above embodiment, it usually can also include: detection battery core temperature in the present embodiment, and judge that battery core temperature is
It is no to be less than preset temperature；If battery core temperature is not less than preset temperature, cut-off discharge operation is executed until battery core temperature is less than in advance
If temperature.
Battery core temperature is set in the present embodiment as T0, preset temperature T3.In the lithium battery pack management system of the present embodiment, protect
Backplate also has battery core temperature detecting unit, and second processor is arranged to: when the battery core temperature T0 >=set temperature detected
When T3, lithium battery group executes cut-off electric discharge, when the battery core temperature T0 < T3 detected, releases discharge prevention.This scheme can
Automatically, effectively prevent lithium cell at high temperature makes battery core temperature continue to increase and accelerate flatulence bulge, damage because continuing electric discharge
Core strueture shortens the working life.In practical application, because of the difference of the lithium battery type of use, set temperature T3 is not also identical.
The lithium battery pack management system of the present embodiment forms lithium battery group using lithium iron phosphate lithium battery, and set temperature T3 is set as 55 DEG C.
Its control process are as follows: after protection board work, lithium battery group starts to discharge, and in discharge process, passes through the temperature-sensitive being placed in battery core
Resistance detection battery core temperature T0, at T0 >=T3 (being 55 DEG C in the present embodiment), MOS switch is pulled to low level by high level, protects
Backplate disconnects discharge loop, realizes the protection of battery core high temperature discharge, lithium battery group cut-off electric discharge；Until T0 < T3 is (in the present embodiment
It is 55 DEG C) when, MOS switch becomes high level from low level, to release the protection of battery core high temperature discharge.
Based on the above embodiment, it can also include: usually detection load resistor value in the present embodiment, and judge load resistance
Whether value is less than default activation resistance critical value；If load resistor value is less than default activation resistance critical value, activation guarantor is carried out
Backplate work；If load resistor value executes low after postponing default 4th period not less than default activation resistance critical value
Power sleep mode.
The present embodiment set load resistor value as R, default activation resistance critical value be R1, default 4th period is t4.This
In the lithium battery pack management system of embodiment, protection board also has sleep pattern converting unit, and second processor is arranged to:
When lithium battery group connects power load every time, as the load resistor value R < setting activation resistance critical value R1 detected, activation
Protection board work, second processor enter normal work；When the i.e. R >=R1 of load is not detected, protection board passes through setting time
The working power that second processor is disconnected after t4, into low power sleep mode.This programme benefit: due to the protection of lithium battery group
Plate work will consume lithium cell electricity, and sleep function can be such that protection board oneself power consumption is limited in lesser range,
So as to which the power consumption of lithium battery pack management system is effectively reduced.In the present solution, load (is added in the one of battery terminal voltage both ends
A load) resistance value R detected by previously described load detecting unit, setting activation resistance critical value R1 then with guarantor
The design of backplate itself sleep circuits is related, and setting time t4 is then mainly arranged according to sleep pattern switching interval, not
One definite value.In the present embodiment, setting activation resistance critical value R1 is set as 1.6M Ω, and setting time t4 is 30s, in this way in lithium electricity
Pond group connects power load every time, and the R < R1 that detects (when in embodiment for 1.6M Ω), activates protection board, second processor
It works on power, protection board has output from power consumption≤5mA, lithium battery group at this time；And in non-loaded connection, that is, the R that detects >=
When R1 (being 1.6M Ω in embodiment), after 30s, protection board disconnects the working power of second processor, sleeps into low-power consumption
Sleep mode, protection board is from power consumption < 0.3uA at this time.
Below to a kind of charging and discharging protection device of lithium battery group provided by the embodiments of the present application, lithium battery group management system
System, engine and engine driving type working machine are introduced, charging and discharging protection device, the lithium electricity of lithium battery group described below
The charge and discharge protecting method of pond group management system, engine and engine driving type working machine and above-described lithium battery group can
Correspond to each other reference.
Referring to FIG. 6, Fig. 6 is a kind of structure of the charging and discharging protection device of lithium battery group provided by the embodiment of the present application
Block diagram；The charging and discharging protection device of the lithium battery group includes charger, and the charger is provided with
Environment temperature detection module 601, for detecting whether environment temperature is greater than default low temperature point；
Voltage judgment module 602 judges whether battery terminal voltage is less than if being greater than default low temperature point for environment temperature
Preset charging sets voltage；
Charge mode execution module 603, if being less than charging setting voltage for battery terminal voltage, according to battery terminal voltage
Numerical values recited execute corresponding charge mode, until battery terminal voltage is equal to charging setting voltage.
Based on the above embodiment, charge mode execution module described in the present embodiment 603, comprising:
Battery terminal voltage judging unit judges institute if being less than the charging for the battery terminal voltage sets voltage
State whether battery terminal voltage is less than preset battery undervoltage setting value；Wherein, the battery undervoltage setting value is less than the charging
Set voltage；
Battery undervoltage charge mode execution unit, if being less than the battery undervoltage setting value for the battery terminal voltage,
Battery undervoltage charge mode is then executed, with default micro-current to lithium battery group charging until the battery terminal voltage is not less than described
Battery undervoltage setting value；
Monitoring temperature charge mode execution unit, if being set for the battery terminal voltage not less than the battery undervoltage
Value, then execute monitoring temperature charge mode, until the battery terminal voltage is equal to the charging and sets voltage.
Based on the above embodiment, the execution unit of monitoring temperature charge mode described in the present embodiment, comprising:
Environment temperature judgment sub-unit is sentenced if being not less than the battery undervoltage setting value for the battery terminal voltage
Whether the environment temperature of breaking, which is less than to preset, is often filled warm spot；Wherein, the default warm spot that often fills is greater than the default low temperature point；
Normal electric current charging subelement, if often warm spot is filled not less than described preset for the environment temperature, with default normal
Electric current is to lithium battery group charging until the battery terminal voltage is equal to the charging and sets voltage；
Low current charge subelement, if being less than described preset for the environment temperature often fills warm spot, to preset small electricity
Stream is to lithium battery group charging until the battery terminal voltage is equal to the charging and sets voltage.
Based on the above embodiment, the charging and discharging protection device of lithium battery group further includes being set to lithium battery group in the present embodiment
In protection board, the protection board is provided with
Battery core terminal voltage detecting module, for detecting whether battery core end voltage is greater than the battery undervoltage setting value；Wherein,
Battery core end voltage is the voltage at lithium cell both ends in the lithium battery group；
First cut-off discharge operation execution module, if being set for battery core end voltage no more than the battery undervoltage
Value executes cut-off discharge operation until battery core end voltage is owed greater than the battery then after postponing default first time period
Press setting value.
Based on the above embodiment, protection board described in the present embodiment further include:
Discharge current detection module for detecting discharge current, and judges the discharge current and default first overcurrent
Protect the size relation of point, default second over-current protection point；Wherein, default first over-current protection point is less than described pre-
If the second over-current protection point；
Second cut-off discharge operation execution module, if being less than or equal to described put for default first over-current protection point
Electric current, and the discharge current is less than default second over-current protection point and holds then after postponing default second time period
The row cut-off discharge operation is until detect that battery-end is non-loaded；
Third ends discharge operation execution module, if being more than or equal to default second overcurrent for the discharge current
Point is protected, then after postponing the default third period, executes the cut-off discharge operation until detecting the battery-end without negative
It carries.
Based on the above embodiment, protection board described in the present embodiment further include:
Battery core temperature detecting module for detecting battery core temperature, and judges whether the battery core temperature is less than preset temperature；
4th cut-off discharge operation execution module executes if being not less than the preset temperature for the battery core temperature
The cut-off discharge operation is until the battery core temperature is less than the preset temperature.
Based on the above embodiment, protection board described in the present embodiment further include:
Load resistor value detection module, for detecting load resistor value, and it is pre- to judge whether the load resistor value is less than
If activating resistance critical value；
Protection board active module carries out if being less than the default activation resistance critical value for the load resistor value
Activate protection board work；
Low power sleep mode execution module, if critical not less than the default activation resistance for the load resistor value
Value executes low power sleep mode then after postponing default 4th period.
The application also provides a kind of lithium battery pack management system, comprising: the charge and discharge of the lithium battery group of above-mentioned any embodiment
Electrical protective device, charge power supply and application system.
The application also provides a kind of engine, comprising: engine body, silencer, air filter, cooling fan, is led at fuel tank
The lithium battery pack management system of fan housing and above-described embodiment.In some embodiments, above-mentioned engine is specially that vertical axis starts
Machine has engine body, fuel tank, silencer, air filter, cooling fan and wind scooper；The engine also has above-mentioned involved
And lithium battery pack management system；Wherein, charge power supply is provided by the power coil that engine has；As opening for application system
Dynamic motor, is arranged on the engine to realize electrically activating for engine.This programme makes lithium battery pack management system of the invention
Be applied in vertical shaft generator (certainly, lithium battery pack management system of the invention also can be applied to the engine of trunnion axis
On).As shown in fig. 7, Fig. 7 is a kind of vertical shaft generator stereoscopic schematic diagram provided by the embodiment of the present application, 11 be hair in Fig. 7
Motivation ontology, 12 be fuel tank, 13 be silencer, 14 be air filter, 15 be wind scooper, 30 be lithium battery group, under wind scooper 15
For the cooling fan (being not shown in Fig. 7) being connected with engine crankshaft.Cooling fan is for generating cooling wind and in wind scooper 15
Guidance go down the components such as cooling engine housing, cylinder and silencer, thus, in the inner or outer side region of wind scooper 15,
Namely hereafter described cooled region, extraneous cooling wind will pass through the region under the action of cooling fan.The lithium battery group is such as
Shown in Fig. 8, Fig. 8 is a kind of lithium battery group stereoscopic schematic diagram provided by the embodiment of the present application.Meanwhile in Fig. 7, do not show that
The structure of charge power supply, the charge power supply use the technology of well known engine self generating, i.e., set on the internal perisporium of flywheel
Muti-piece magnet steel is set, at least one set of power coil, engine are set on the cabinet exterior of engine body corresponding with magnet steel
When operating, magnetic force line cutting power coil that magnet steel on flywheel generates and generate electricity, it is rectified after as charger charging it is electric
Source.For such generation technology, those skilled in the art can implement easily, so omitting relevant drawings in explanation.
Based on the above embodiment, the engine in the present embodiment, charger, lithium battery group are installed on engine to solve
The installation site of charger, lithium battery group.Specifically, the charger and/or lithium in the present embodiment lithium battery pack management system
Battery pack is installed on the inside and or outside of wind scooper.That is, charger, lithium battery group at least one be mounted on
At least one side of the inner or outer side of the wind scooper of engine.The installation site of charger, lithium battery group is further limited,
It can be the two while being mounted on the inside of wind scooper, be also possible to the two while being mounted on the outside of wind scooper, be also possible to
Charger peace inside, lithium battery group Anwai side, alternatively, charger Anwai side, lithium battery group peace inside, any mode all may be used
With.Meanwhile lithium battery group and/or charger, it may be mounted on wind scooper, may not be and be mounted on wind scooper but pacify
Mounted in other positions of engine, if make lithium battery group and/or charger be in engine cooling fan be formed by it is cold
But region.Preferably by lithium battery group and/or charger, at least one is mounted on vertical shaft generator to the present embodiment
The inner or outer side of wind scooper is at least one.In embodiment as shown in Figure 7, lithium battery group 30 is arranged on vertical axis hair
On the wind scooper 15 of motivation and the outside in wind scooper, charger (being not shown in Fig. 7) are preferably disposed on the interior of wind scooper 15
On side wall.The reason of being arranged in this way is that the wind scooper of vertical shaft generator can have nearby because there is the cooling wind of engine to flow through
Effect solves the heat dissipation problem of lithium battery group, charger.
Based on the above embodiment, the engine in the present embodiment, charger, lithium battery group axis be arranged in parallel, this master
Beautiful consideration is laid out from the two.
The application also provides a kind of engine driving type working machine, comprising: rack；Be set in rack has as previously described
The engine of lithium battery pack management system, and by engine-driven generator；Lithium electricity in aforementioned lithium battery management system
Pond group and charger are arranged on engine driving type working machine, also, at least lithium battery group is set in lithium battery and charger
It sets in the cooled region of the cooling fan of engine.Wherein, lithium battery management system, charge power supply are provided by generator；
As the starting motor of application system, it is arranged on the engine to realize electrically activating for engine.As shown in figure 9, Fig. 9 is this
Apply for a kind of engine generator (i.e. engine driving type working machine) stereoscopic schematic diagram provided by embodiment, Fig. 9
In 13 be silencer, 20 be charger, 24 be charger mounting bracket, 30 be lithium battery group, 41 be rack, 42 be engine,
43 it is generator (magneto), 44 be starting motor, 45 be inverter, 46 is hand pulling starter.Hand pulling starter in embodiment
46 can be integrated with wind scooper (being not shown in Fig. 9), and the cooling fan being connected on the inside of wind scooper with engine crankshaft is (in Fig. 9
It is not shown), which is formed with the cooled region that cooling wind flows through, i.e., (is being in one with hand pulling starter adjacent to wind scooper
Can also claim hand pulling starter when body) air inlet side region；It is understood that provided that embodiment be mute power generator i.e.
Mute engine driving type working machine (no attached drawing, but industry technology personnel are readily appreciated that), then surround rack be provided with every
The shell (i.e. cabinet) of sound, such mute power generator, air inlet of the cooled region except the wind scooper of preceding signified adjacent engine
It further include air inlet near zone set on shell outside side region；So-called air inlet near zone, can be shell shell wall
Close to the lateral area of air inlet, be also possible to shell shell wall close to the inside region of air inlet, can by lithium battery group and/or
Charger is arranged on the shell, and lithium battery group and/or charger can also be positioned close to air inlet and are located in shell
On the bottom plate of rack.Wherein, as shown in Figure 10, Figure 10 is a kind of lithium battery provided by the embodiment of the present application to the lithium battery group 30
Group stereoscopic schematic diagram.Anyway, as long as guaranteeing that at least lithium battery group is arranged in cooling fan institute shape in lithium battery and charger
At cooled region in.Charger 20 can be found in Figure 11 and Figure 12, and Figure 11 is that one kind provided by the embodiment of the present application is filled
Electric appliance stereoscopic schematic diagram, Figure 12 are a kind of charger stereoscopic schematic diagram of another angle provided by the embodiment of the present application.Figure 11
In 21 be light source of charger input, 22 be light source of charger output, 23 be charger mounting hole in Figure 12.Charger is in the present invention
In its calorific value be not it is too high, targetedly design heat dissipation can also, can have special cooling measure more preferably certainly, thus
" at least lithium battery group setting is formed by cooled region in cooling fan in lithium battery and charger ".Thus, practical application
In, charger can also be provided at engine driving type working machine (engine generator i.e. in embodiment) have compared with
On the position of low ambient temperature, such as control panel, decoration panel, or be directly arranged on the shell of lithium battery group etc..
In the embodiment shown in fig. 9, lithium battery group 30, charger 20 are all set on engine generator, tool
For body, lithium battery group 30 is set up directly on the bottom plate of rack 41, and charger 20 passes through a mounting bracket (being not shown in Fig. 9)
On the bottom plate that lithium battery group 30 is set to rack, and lithium battery group 30, charger 20 both are set to close to hand pulling starter
46 (i.e. close to wind scooper) and in cooling fan cooled region in.This programme is lithium battery pack management system of the invention
Another application is applied on engine-driven working machine, is particularly applied on engine generator.This programme
Because itself being engine-driven generator, charge power supply is directly derived from the DC output end of generator.Certainly, it can also
Be applied on other working machines, for example, by with lithium battery pack management system of the invention engine-driven grass trimmer, cut
Careless vehicle or snowplough, water pump assembly etc..
Based on the above embodiment, the engine driving type working machine in the present embodiment, wherein lithium battery group and/or charging
Device is set to the bottom plate or engine or generator or the shell for surrounding engine driving type working machine set by rack of rack
One of on.This programme is specifically related to lithium battery group, the preferred installation site of charger, and lithium battery group, charger can be with
It is respectively arranged in the bottom plate of rack or engine or generator or surrounds the outer of engine driving type working machine set by rack
On one of shell, can also both be installed on the bottom plate of rack simultaneously or engine or generator or surround set by rack
One of the shell of engine driving type working machine on, as long as the setting of lithium battery group, charger meets such item
Part: at least lithium battery group is installed in the position for being subjected to the cold air stream that part is formed by cooling fan, Ye Jizhi
's lithium battery group should less be in the cooled region of the cooling fan of engine.Certainly, these are not limited in practical application
Optimum position can also be the position on other engine generators, numerous to list herein.Lithium battery group, charging
How implement body is configured, and considers volume, the weight of lithium battery group mainly to determine the installation site of lithium battery group, and charges
Device is preferably arranged close to lithium battery group because its volume and weight is all smaller.This programme mainly solves at least lithium battery group
Heat dissipation problem, if charger is also mounted at the position of acceptable part cold air stream, the heat dissipation problem of that charger is also obtained
It solves.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For embodiment provide device and
Speech, since it is corresponding with the method that embodiment provides, so being described relatively simple, related place is referring to method part illustration
?.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Above to a kind of charge and discharge protecting method, apparatus of lithium battery group provided herein, lithium battery group management system
System, engine and engine driving type working machine are described in detail.Original of the specific case to the application used herein
Reason and embodiment are expounded, and the present processes that the above embodiments are only used to help understand and its core are thought
Think.It should be pointed out that for those skilled in the art, under the premise of not departing from the application principle, may be used also
With to the application, some improvement and modification can also be carried out, these improvement and modification are also fallen into the protection scope of the claim of this application.
Claims (19)
1. a kind of charge and discharge protecting method of lithium battery group characterized by comprising
Whether detection environment temperature is greater than default low temperature point；
If the environment temperature is greater than the default low temperature point, judge whether battery terminal voltage is less than preset charging setting electricity
Pressure；
Numerical values recited execution pair if the battery terminal voltage is less than the charging and sets voltage, according to the battery terminal voltage
The charge mode answered, until the battery terminal voltage is equal to the charging and sets voltage.
2. the charge and discharge protecting method of lithium battery group according to claim 1, which is characterized in that if the battery-end
Voltage is less than the charging and sets voltage, then executes corresponding charge mode according to the numerical values recited of the battery terminal voltage, directly
It is equal to the charging to the battery terminal voltage and sets voltage, comprising:
If the battery terminal voltage, which is less than the charging, sets voltage, judge whether the battery terminal voltage is less than preset electricity
Setting value that pond is under-voltage；Wherein, the battery undervoltage setting value is less than charging setting voltage；
If the battery terminal voltage is less than the battery undervoltage setting value, battery undervoltage charge mode is executed, to preset micro- electricity
Stream is to lithium battery group charging until the battery terminal voltage is not less than the battery undervoltage setting value；
If the battery terminal voltage is not less than the battery undervoltage setting value, monitoring temperature charge mode is executed, until described
Battery terminal voltage is equal to the charging and sets voltage.
3. the charge and discharge protecting method of lithium battery group according to claim 2, which is characterized in that if the battery-end
Voltage is not less than the battery undervoltage setting value, then executes monitoring temperature charge mode, until the battery terminal voltage is equal to institute
State charging setting voltage, comprising:
If the battery terminal voltage is not less than the battery undervoltage setting value, it is default normal to judge whether the environment temperature is less than
Fill warm spot；Wherein, the default warm spot that often fills is greater than the default low temperature point；
If the environment temperature not less than it is described it is default often fill warm spot, with preset normal electric current to lithium battery group charging up to
The battery terminal voltage is equal to the charging and sets voltage；
If the environment temperature, which is less than described preset, often fills warm spot, with default low current to lithium battery group charging until institute
It states battery terminal voltage and sets voltage equal to the charging.
4. the charge and discharge protecting method of lithium battery group according to claim 2, which is characterized in that further include:
Whether detection battery core end voltage is greater than the battery undervoltage setting value；Wherein, battery core end voltage is the lithium battery
The voltage at lithium cell both ends in group；
If battery core end voltage is not more than the battery undervoltage setting value, after postponing default first time period, executes and cut
Only discharge operation is until battery core end voltage is greater than the battery undervoltage setting value.
5. the charge and discharge protecting method of lithium battery group according to claim 4, which is characterized in that further include:
Discharge current is detected, and judges the discharge current and default first over-current protection point, default second overcurrent protection
The size relation of point；Wherein, default first over-current protection point is less than default second over-current protection point；
If default first over-current protection point is less than or equal to the discharge current, and the discharge current is less than described preset
Second over-current protection point executes the cut-off discharge operation until detecting battery then after postponing default second time period
It holds non-loaded；
If the discharge current is more than or equal to default second over-current protection point, after postponing the default third period,
The cut-off discharge operation is executed until detecting that the battery-end is non-loaded.
6. the charge and discharge protecting method of lithium battery group according to claim 5, which is characterized in that further include:
Battery core temperature is detected, and judges whether the battery core temperature is less than preset temperature；
If the battery core temperature is not less than the preset temperature, the cut-off discharge operation is executed until the battery core temperature is small
In the preset temperature.
7. the charge and discharge protecting method of lithium battery group according to claim 6, which is characterized in that further include:
Load resistor value is detected, and judges whether the load resistor value is less than default activation resistance critical value；
If the load resistor value is less than the default activation resistance critical value, activation protection board work is carried out；
If the load resistor value is not less than the default activation resistance critical value, after postponing default 4th period, hold
Row low power sleep mode.
8. a kind of charging and discharging protection device of lithium battery group, which is characterized in that including charger, the charger is provided with
Environment temperature detection module, for detecting whether environment temperature is greater than default low temperature point；
Voltage judgment module judges whether battery terminal voltage is small if being greater than the default low temperature point for the environment temperature
Voltage is set in preset charging；
Charge mode execution module, if being less than the charging for the battery terminal voltage sets voltage, according to the battery
The numerical values recited of voltage is held to execute corresponding charge mode, until the battery terminal voltage is equal to the charging and sets voltage.
9. the charging and discharging protection device of lithium battery group according to claim 8, which is characterized in that the charge mode executes
Module, comprising:
Battery terminal voltage judging unit judges the electricity if being less than the charging for the battery terminal voltage sets voltage
Whether pond end voltage is less than preset battery undervoltage setting value；Wherein, the battery undervoltage setting value is set less than the charging
Voltage；
Battery undervoltage charge mode execution unit is held if being less than the battery undervoltage setting value for the battery terminal voltage
Row battery undervoltage charge mode, with default micro-current to lithium battery group charging until the battery terminal voltage is not less than the battery
Under-voltage setting value；
Monitoring temperature charge mode execution unit, if being not less than the battery undervoltage setting value for the battery terminal voltage,
Monitoring temperature charge mode is executed, until the battery terminal voltage is equal to the charging and sets voltage.
10. the charging and discharging protection device of lithium battery group according to claim 9, which is characterized in that the monitoring temperature fills
Power mode execution unit, comprising:
Environment temperature judgment sub-unit judges institute if being not less than the battery undervoltage setting value for the battery terminal voltage
It states environment temperature and whether is less than and default often fill warm spot；Wherein, the default warm spot that often fills is greater than the default low temperature point；
Normal electric current charging subelement, if often warm spot is filled not less than described preset for the environment temperature, to preset normal electric current
To lithium battery group charging until the battery terminal voltage is equal to the charging and sets voltage；
Low current charge subelement, if being less than described preset for the environment temperature often fills warm spot, to preset low current pair
The lithium battery group charging is until the battery terminal voltage is equal to the charging and sets voltage.
11. the charging and discharging protection device of lithium battery group according to claim 9, which is characterized in that further include being set to lithium
Protection board in battery pack, the protection board are provided with
Battery core terminal voltage detecting module, for detecting whether battery core end voltage is greater than the battery undervoltage setting value；Wherein, described
Battery core end voltage is the voltage at lithium cell both ends in the lithium battery group；
First cut-off discharge operation execution module, if being not more than the battery undervoltage setting value for battery core end voltage,
After postponing default first time period, cut-off discharge operation is executed until battery core end voltage is set greater than the battery undervoltage
Value.
12. the charging and discharging protection device of lithium battery group according to claim 11, which is characterized in that the protection board also wraps
It includes:
Discharge current detection module for detecting discharge current, and judges the discharge current and default first overcurrent protection
The size relation of point, default second over-current protection point；Wherein, default first over-current protection point is less than described default the
Two over-current protection points；
Second cut-off discharge operation execution module, if being less than or equal to the electric discharge electricity for default first over-current protection point
Stream, and the discharge current is less than default second over-current protection point and executes institute then after postponing default second time period
Cut-off discharge operation is stated until detecting that battery-end is non-loaded；
Third ends discharge operation execution module, if being more than or equal to default second overcurrent protection for the discharge current
Point executes the cut-off discharge operation until detecting that the battery-end is non-loaded then after postponing the default third period.
13. the charging and discharging protection device of lithium battery group according to claim 12, which is characterized in that the protection board also wraps
It includes:
Battery core temperature detecting module for detecting battery core temperature, and judges whether the battery core temperature is less than preset temperature；
4th cut-off discharge operation execution module, if for the battery core temperature be not less than the preset temperature, execute described in
End discharge operation until the battery core temperature is less than the preset temperature.
14. the charging and discharging protection device of lithium battery group according to claim 13, which is characterized in that the protection board also wraps
It includes:
Load resistor value detection module, for detecting load resistor value, and it is default sharp to judge whether the load resistor value is less than
Resistance critical value living；
Protection board active module is activated if being less than the default activation resistance critical value for the load resistor value
Protection board work；
Low power sleep mode execution module, if being not less than the default activation resistance critical value for the load resistor value,
Then after postponing default 4th period, low power sleep mode is executed.
15. a kind of lithium battery pack management system characterized by comprising
Such as the charging and discharging protection device of the described in any item lithium battery groups of claim 8 to 14, charge power supply and application system.
16. a kind of engine characterized by comprising
Engine body, fuel tank, silencer, air filter, cooling fan, wind scooper and lithium battery group as claimed in claim 15
Management system.
17. engine according to claim 16, which is characterized in that the charger in the lithium battery pack management system
And/or lithium battery group is installed on the inside and or outside of the wind scooper.
18. a kind of engine driving type working machine characterized by comprising rack；Such as claim is set in the rack
Engine described in 16, and by engine-driven generator；Lithium electricity in the lithium battery management system of the engine
Pond group and charger are set on the engine driving type working machine；Also, in the lithium battery group and the charger extremely
In the cooled region for the cooling fan that few lithium battery group is in the engine.
19. engine driving type working machine according to claim 18, which is characterized in that the lithium battery group and/or institute
Charger is stated, the bottom plate of the rack is set to or the engine or the generator or surrounds the rack and is formed by hair
On one of shell of the driving working machine of motivation.
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| CN201910594801.8A CN110311183B (en) | 2019-07-03 | 2019-07-03 | Charge-discharge protection method and device for lithium battery pack |
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| CN201910594801.8A CN110311183B (en) | 2019-07-03 | 2019-07-03 | Charge-discharge protection method and device for lithium battery pack |
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