CN110406426A - A kind of lithium electricity fork truck specialized lithium battery pack system and control method - Google Patents
A kind of lithium electricity fork truck specialized lithium battery pack system and control method Download PDFInfo
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- CN110406426A CN110406426A CN201910689779.5A CN201910689779A CN110406426A CN 110406426 A CN110406426 A CN 110406426A CN 201910689779 A CN201910689779 A CN 201910689779A CN 110406426 A CN110406426 A CN 110406426A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of lithium electricity fork truck specialized lithium battery pack system and control methods, belong to electri forklift lithium battery pack monitoring technology field.Including battery modules, battery management system, DC-DC converter, electric discharge connector and charge connector, the lithium battery pack system further includes the heating sheet being mounted in battery modules, the battery modules are connect by DC-DC converter with battery management system, and battery modules are connect with electric discharge connector and charge connector respectively；The both ends of heating sheet are connected to the both ends of battery modules.It formulates reasonable heating strategy and information is interacted by CAN communication and lithium electricity fork truck, can guarantee the use of lithium battery pack system and lithium electricity fork truck at low ambient temperatures.
Description
Technical field
The present invention relates to electri forklift lithium battery pack monitoring technology field more particularly to a kind of dedicated lithium batteries of lithium electricity fork truck
Packet system and control method.
Background technique
With being continuously increased for current vehicle population, the consumption of conventional petroleum chemical energy source increasingly adds up, and causes tight
The problem of environmental pollution of weight.Petroleum is as a kind of non-renewable resources in a short time, with the increasing of usage amount and subtracting for ownership
Few, supply will be becoming tight day, and price will constantly increase, a series of this industry by limitation using conventional petroleum as the energy
Development.The status of world today's energy development has derived many new energy products, and being widely applied to traffic need to
Ask market.Country vigorously supports, the growth of the market demand, the great-leap-forward development for pushing lithium electricity in China's economic.Lithium iron battery into
Subversive development potentiality can be brought to electri forklift by entering Forklift Industry, compare lead-acid battery, lithium battery is in practicability, economy
Aspect has greater advantage, is the development trend of the following electri forklift.
Currently, battery used in electri forklift seldom uses lithium ion battery, plumbic acid electricity based on lead-acid battery in the market
Meeting " liberation of hydrogen " when pond is charged, generates acid mist, and environmental pollution is serious；Lead-acid battery discharge rate is low, general lead-acid battery electric discharge
Rate is only 83.0%, and battery capacity cannot be fully used；Lead-acid battery charge efficiency is low, the average charge effect of lead-acid battery
Rate is 80%, and electricity charges to 100% needs 8~10 hours by 0%, and acid mist can be generated in charging process, need to be placed in dedicated
It divulges information charging room, is otherwise also easy to produce air detonation, when charging also needs to manually check distillation water content and artificial supplementation；Plumbic acid electricity
Pond has memory effect of cell, and within complete charge and discharge 400~1000 times, remaining capacity 10% has memory effect；Low temperature discharge
Aspect of performance, the optimal discharge temperature of lead-acid battery are 25 DEG C, and once, capacity declines 1% to the every drop of temperature, 0 DEG C of capacity residue
70%-75%；In terms of battery standing, lead-acid battery standing is not used in 1 year or is not charged, and will lead to the fast prompt drop of battery capacity
It is low, heavy metal pollution is also easy to produce to environment when lead-acid battery is used and recycled, how to develop a kind of safe and environment-friendly, service life
Electri forklift lithium ion battery that is long, can be quickly charged and discharged is in the urgent need to address one of professional and technical personnel in the field
Technical problem.
Due to the chemical characteristic of lithium battery, for battery core in 0 DEG C of situation below, electric discharge and charging ability have very big limit
System, unconfined use can seriously affect the capacity of battery system, significantly reduction battery life.So electric fork common at present
Vehicle lithium battery packet is not all suitable for low temperature environment.
Therefore, to solve the above problems, being badly in need of inventing a kind of new lithium battery pack system.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of lithium electricity fork truck specialized lithium battery pack system and controls
Method is monitored by the temperature to lithium battery, avoids lithium battery work in low temperature environment.
A kind of lithium electricity fork truck specialized lithium battery pack system, including battery modules, battery management system, DC-DC converter, put
Electric connector and charge connector, the lithium battery pack system further include the heating sheet being mounted in battery modules, the battery
Mould group is connect by DC-DC converter with battery management system, and battery modules respectively with connector and the charge connector of discharging
Connection；The both ends of heating sheet are connected to the both ends of battery modules.
Further, the battery modules be equipped with temperature sensor, the temperature of temperature sensor measurement mould group battery core,
And temperature sensor is connect with battery management system；Battery modules both ends are connect with battery management system, battery management system
Acquire battery modules both end voltage and temperature sensor temperature data.
Further, the battery modules anode is equipped with total positive fuse, and by total positive fuse respectively with
DC-DC converter, electric discharge connector anode are connected with charge connector anode；The negative terminal of the battery modules is equipped with current divider, and
It is connect respectively with DC-DC converter, electric discharge connector negative terminal and charge connector negative terminal by current divider；The one of the heating sheet
It holds and is connect with the anode of total positive fuse, the anode of charge connector, the connector that discharges, the other end and current divider of heating sheet,
Charge connector negative terminal, electric discharge connector negative terminal connection.
Further, charge relay, the electricity are in series between the anode and charge connector of the battery modules
Electric discharge relay is in series between the anode and electric discharge connector of Chi Mo group；It is set between the battery modules and DC-DC converter
There is key switch.
Further, the both ends of the heating sheet are respectively equipped with the positive relay of heating and heat negative relay, and heating is just
Relay and the anode of battery modules connect, and the other end is connect with the anode of charge connector and electric discharge connector, heat bear after
Electric appliance and the negative terminal of battery modules connect, and the other end is connect with charge connector and electric discharge connector negative terminal.
Further, the electric discharge relay both ends are parallel with preliminary filling resistance and preliminary filling relay, the preliminary filling resistance
It is connected in series with preliminary filling relay.
Further, when battery modules are charged, initial battery core minimum temperature Tmin > 12 DEG C is powered on, are not opened
Heating is opened, pure charge mode, battery modules charging are directly entered；At Tmin < -28 DEG C of battery core minimum temperature, forbid heating；Heating
Unlocking condition: battery core minimum temperature Tmin≤12 DEG C；Closedown condition: battery core minimum temperature Tmin >=15 DEG C.
Further, when battery modules are discharged, initial battery core minimum temperature Tmin > 5 DEG C is powered on, are not turned on heating, directly
It taps into pure electric discharge；At Tmin < -30 DEG C of battery core minimum temperature, forbid heating；Heating unlocking condition: it is minimum to power on initial battery core
Temperature Tmin≤5 DEG C；Closedown condition: battery core minimum temperature Tmin >=10 DEG C.
Further, initial Tmin < -10 DEG C of battery core minimum temperature and SOC < 20% are powered on, is not closed heating relay, and
Fall power instruction is sent to vehicle, sends cutoff command after 60S, discharge current > 30A continues 8S if detecting, disconnects electric discharge
Relay, relay do not restore；Initial < -10 DEG C of battery core minimum temperature Tmin and SOC >=20% are powered on, cutoff command is sent, closes
Heating relay is closed to begin to warm up；Initial -10 DEG C of battery core minimum temperature≤Tmin≤5 DEG C are powered on, closure heating relay starts
Heating；Power on initial battery core minimum temperature Tmin > 5 DEG C, pure discharge mode；When Tmin >=10 DEG C, judge into second of heating,
When Tmin≤0 DEG C, cutoff command is sent to vehicle, discharge current > 30A continues 8S and disconnects electric discharge relay if detecting；Weight
It newly powers on, is then again introduced into heating judgement.
A kind of control method based on a kind of lithium electricity fork truck specialized lithium battery pack system, comprising the following steps:
(1) BMS power-supply management system powers on, and judges whether to detect charging signals, and electric discharge is disconnected if detecting charging signals
Related relay executes step (2) into charge mode；If not detecting charging signals, charge relay entrance is disconnected
Step (4) discharge mode；
(2) it after entering charge mode, judges whether there is charge fault or is full of, filled if so, sending to terminate to charger
Telegram text, 2s cut off the related relay that charges later, re-execute the steps (1) BMS power-supply management system and re-power；If it is not,
Then follow the steps (3)；
(3) it is closed charge relay, charging heating method is executed: powering on initial battery core minimum temperature Tmin > 12 DEG C, is not turned on and adds
Heat is directly entered pure charging；At described Tmin < -28 DEG C of battery core minimum temperature, forbid heating；Heat unlocking condition: battery core is minimum
Temperature Tmin≤12 DEG C；Closedown condition: battery core minimum temperature Tmin >=15 DEG C；When battery core minimum temperature Tmin < 0 DEG C, added
Heat, and do not charge；BMS power control system re-powers after completing the above judgement and movement；
(4) after entering discharge mode, discharge prevention is judged whether there is, and if it exists, then after 1s, disconnect the related relay that discharges
And lock, then return step (1), BMS power-supply management system re-power；Discharge prevention if it does not exist, then be closed preliminary filling after
Electric appliance, closure electric discharge relay after 500ms disconnect preliminary filling relay after 1000ms, then execute step (5) and discharge heating side
Method；
(5) electric discharge heating means: initial battery core minimum temperature Tmin > 5 DEG C are powered on, heating is not turned on, are directly entered pure electric discharge；Electricity
At Tmin < -30 DEG C of core minimum temperature, forbid heating；Heating unlocking condition: initial battery core minimum temperature Tmin≤5 DEG C are powered on；It closes
Close condition: battery core minimum temperature Tmin >=10 DEG C；Initial Tmin < -10 DEG C of battery core minimum temperature and SOC < 20% are powered on, is not closed
Positive relay or the negative relay of heating are heated, and sends fall power instruction to vehicle, cutoff command is sent after 60S, if inspection
It measures discharge current > 30A and continues 8S, disconnect electric discharge relay, relay does not restore；Power on initial battery core minimum temperature Tmin
< -10 DEG C and SOC >=20%, send cutoff command, and closure heats positive relay and heats negative relay and begins to warm up；It powers on just
- 10 DEG C≤Tmin≤5 DEG C of beginning battery core minimum temperature, closure heat positive relay and heat negative relay and begin to warm up；It powers on just
Beginning battery core minimum temperature Tmin > 5 DEG C, pure discharge mode；When Tmin >=10 DEG C, into second of heating judgement, when Tmin≤0 DEG C
When, cutoff command is sent to vehicle, discharge current > 30A continues 8S and disconnects electric discharge relay if detecting；Complete the above movement and
After judgement, BMS power control system is re-powered, then is again introduced into heating judgement.
The present invention provides a kind of lithium electricity fork truck lithium battery pack system, formulates reasonable heating strategy and passes through CAN communication
Information is interacted with lithium electricity fork truck, can guarantee the use of lithium battery pack system and lithium electricity fork truck at low ambient temperatures.
Detailed description of the invention
Fig. 1 is structure of the invention connection figure；
Fig. 2 is control flow chart of the present invention.
Specific embodiment
Technical solution of the present invention is described further with reference to the accompanying drawings of the specification.
As shown in Figure 1, a kind of lithium electricity fork truck specialized lithium battery pack system, including battery modules, heating sheet, battery management system
System, non-isolation type DC-DC converter, debugging mouth, electric discharge connector and charge connector.The anode of the battery modules is equipped with total
Positive fuse, and connect respectively with the anode of DC-DC converter, electric discharge connector and charge connector by total positive fuse.
The negative terminal of the battery modules is equipped with current divider, and is connected respectively with DC-DC converter, electric discharge connector and charging by current divider
Connect the negative terminal connection of device.The DC-DC converter is connect with battery management system, and DC-DC converter and battery in order to prevent
Management system reverse-connection damage battery management system is equipped with diode between DC-DC converter and battery management system, prevents electricity
Flow reverse flow, the negativing ending grounding of DC-DC converter and battery management system.Battery management system is distinguished by the first CAN bus
It connect with debugging mouth and electric discharge connector, is connect respectively with debugging mouth and charge connector by the second CAN bus.
In order to realize the control to battery management system shutdown electricity, key is equipped between total positive fuse and DC-DC converter
Switch, closes the switch, and DC-DC converter, which powers on, carries out voltage conversion, battery management system work；Switch disconnects, DC-DC converter
Power-off, battery management system do not work.
In order to realize the control of charge and discharge, electric discharge relay is in series between total positive fuse and electric discharge connector anode
Device, preliminary filling resistance and pre-charge-relay, the electric discharge relay are connected in parallel with preliminary filling resistance, pre-charge-relay, preliminary filling
Resistance and preliminary filling relay are connected in series.Preliminary filling resistance and preliminary filling relay give entire car controller before electric discharge relay is attracted
Capacitor precharge, prevent electric discharge relay adhesion.Charging is in series between total positive fuse and charge connector anode
Relay.
It since lithium battery is in the environment of low temperature, not can be carried out charge and discharge, therefore be equipped with heating sheet in battery modules, add
The both ends of backing are equipped with heating relay, and one end of heating sheet, which is equipped with, heats positive relay, heat the other end of positive relay with
Total positive fuse is connected with the common end of electric discharge relay；The other end of the heating sheet, which is equipped with, heats negative relay, and heating is negative
The other end of relay is connect with the negative terminal of current divider and the connector that discharges.When a heating relay sticks together situation,
Another heating relay can play the role of control and disconnect.
Battery modules are equipped with temperature sensor, for measuring the temperature of battery modules upper mold group battery core, temperature sensor
Both ends connect with battery management system, meanwhile, battery modules both ends are connect with battery management system, battery management system acquisition
The voltage at battery modules both ends.Relay used in system is automotive grade relay.
As shown in Fig. 2, control method is as follows:
(1) BMS power-supply management system powers on, and judges whether to detect charging signals, and electric discharge is disconnected if detecting charging signals
Related relay executes step (2) into charge mode；If not detecting charging signals, charge relay entrance is disconnected
Step (4) discharge mode；
(2) it after entering charge mode, judges whether there is charge fault or is full of, filled if so, sending to terminate to charger
Telegram text, 2s cut off the related relay that charges later, re-execute the steps (1) BMS power-supply management system and re-power；If it is not,
Then follow the steps (3)；
(3) it is closed charge relay, charging heating method is executed: powering on initial battery core minimum temperature Tmin > 12 DEG C, is not turned on and adds
Heat is directly entered pure charging；The electric current I of pure charging is total=I matrix, I matrix is mould group electric current；The battery core minimum temperature Tmin
At < -28 DEG C, forbid heating.Heat unlocking condition: battery core minimum temperature Tmin≤12 DEG C；Closedown condition: battery core minimum temperature
Tmin >=15 DEG C, electric current I is total=I matrix+I heating.When battery core minimum temperature Tmin < 0 DEG C, heated, and do not charge, I is total
=I heating.BMS power control system re-powers after completing the above judgement and movement；
(4) after entering discharge mode, discharge prevention is judged whether there is, and if it exists, then after 1s, disconnect the related relay that discharges
And lock, then return step (1), BMS power-supply management system re-power；Discharge prevention if it does not exist, then be closed preliminary filling after
Electric appliance, closure electric discharge relay after 500ms disconnect preliminary filling relay after 1000ms, then execute step (5) and discharge heating side
Method；
(5) electric discharge heating means: initial battery core minimum temperature Tmin > 5 DEG C are powered on, heating is not turned on, are directly entered pure electric discharge；Electricity
At Tmin < -30 DEG C of core minimum temperature, forbid heating；Heating unlocking condition: initial battery core minimum temperature Tmin≤5 DEG C are powered on；It closes
Close condition: battery core minimum temperature Tmin >=10 DEG C；It powers on initial Tmin < -10 DEG C of battery core minimum temperature and SOC < 20%(SOC is
Electricity), it is not closed the positive relay of heating or the negative relay of heating, and send fall power instruction to vehicle, sends and stop after 60S
Vehicle instruction, if detecting, discharge current > 30A continues 8S, disconnects electric discharge relay, and relay does not restore；Power on initial battery core most
< -10 DEG C of low temperature Tmin and SOC >=20%, transmission cutoff command, closure, which heats positive relay and heats negative relay, to be started to add
Heat；Initial -10 DEG C of battery core minimum temperature≤Tmin≤5 DEG C are powered on, closure, which heats positive relay and heats negative relay, to be started to add
Heat；Power on initial battery core minimum temperature Tmin > 5 DEG C, pure discharge mode；When Tmin >=10 DEG C, judge into second of heating, when
When Tmin≤0 DEG C, cutoff command is sent to vehicle, discharge current > 30A continues 8S and disconnects electric discharge relay if detecting；It completes
After the above movement and judgement, BMS power control system is re-powered, then is again introduced into heating judgement.
Claims (10)
1. a kind of lithium electricity fork truck specialized lithium battery pack system, including battery modules, battery management system, DC-DC converter, electric discharge
Connector and charge connector, it is characterised in that the lithium battery pack system further includes the heating sheet being mounted in battery modules,
The battery modules are connect by DC-DC converter with battery management system, and battery modules connector and are filled with discharging respectively
Electric connector connection；The both ends of heating sheet are connected to the both ends of battery modules.
2. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 1, it is characterised in that the battery mould
Group is equipped with temperature sensor, the temperature of temperature sensor measurement mould group battery core, and temperature sensor and battery management system
Connection；Battery modules both ends are connect with battery management system, and battery management system acquires battery modules both end voltage and temperature passes
Sensor temperature data.
3. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 1, it is characterised in that the battery mould
Group anode is equipped with total positive fuse, and by total positive fuse respectively with DC-DC converter, electric discharge connector anode and charging
The connection of connector anode；The negative terminal of the battery modules be equipped with current divider, and by current divider respectively with DC-DC converter, electric discharge
Connector negative terminal is connected with charge connector negative terminal；One end of the heating sheet and total positive fuse, charge connector anode,
The anode connection of electric discharge connector, the other end and current divider, charge connector negative terminal, the electric discharge connector negative terminal of heating sheet connect
It connects.
4. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 1, it is characterised in that the battery mould
It is in series with charge relay between the anode and charge connector of group, is gone here and there between the anode and electric discharge connector of the battery modules
It is associated with electric discharge relay；Key switch is equipped between the battery modules and DC-DC converter.
5. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 1, it is characterised in that the heating sheet
Both ends be respectively equipped with the positive relay of heating and heat negative relay, the anode for heating positive relay and battery modules connects, separately
One end is connect with the anode of charge connector and the connector that discharges, and the negative terminal for heating negative relay and battery modules connects, another
End is connect with charge connector and electric discharge connector negative terminal.
6. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 4, it is characterised in that the electric discharge after
Electric appliance both ends are parallel with preliminary filling resistance and preliminary filling relay, and the preliminary filling resistance and preliminary filling relay are connected in series.
7. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 2, it is characterised in that when battery modules need
When being charged, initial battery core minimum temperature Tmin > 12 DEG C are powered on, heating is not turned on, are directly entered pure charge mode, battery
The charging of mould group；At Tmin < -28 DEG C of battery core minimum temperature, forbid heating；Heat unlocking condition: battery core minimum temperature Tmin≤12
℃；Closedown condition: battery core minimum temperature Tmin >=15 DEG C.
8. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 2, it is characterised in that when battery modules are put
When electric, initial battery core minimum temperature Tmin > 5 DEG C are powered on, heating is not turned on, are directly entered pure electric discharge；Battery core minimum temperature Tmin
At < -30 DEG C, forbid heating；Heating unlocking condition: initial battery core minimum temperature Tmin≤5 DEG C are powered on；Closedown condition: battery core is most
Low temperature Tmin >=10 DEG C.
9. a kind of lithium electricity fork truck specialized lithium battery pack system according to claim 9, it is characterised in that power on initial battery core
Tmin < -10 DEG C of minimum temperature and SOC < 20%, are not closed heating relay, and send fall power instruction to vehicle, after 60S
Cutoff command is sent, discharge current > 30A continues 8S if detecting, disconnects electric discharge relay, and relay does not restore；It powers on initial
< -10 DEG C of battery core minimum temperature Tmin and SOC >=20%, send cutoff command, and closure heating relay is begun to warm up；It powers on just
- 10 DEG C≤Tmin≤5 DEG C of beginning battery core minimum temperature, closure heating relay are begun to warm up；Power on initial battery core minimum temperature
Tmin > 5 DEG C, pure discharge mode；When Tmin >=10 DEG C, sent into second of heating judgement when Tmin≤0 DEG C to vehicle
Cutoff command, if detecting, discharge current > 30A continues 8S and disconnects electric discharge relay；It re-powers, is then again introduced into heating and sentences
It is disconnected.
10. a kind of based on a kind of control method of lithium electricity fork truck specialized lithium battery pack system as claimed in claim 2, feature exists
In the following steps are included:
(1) BMS power-supply management system powers on, and judges whether to detect charging signals, and electric discharge is disconnected if detecting charging signals
Related relay executes step (2) into charge mode；If not detecting charging signals, charge relay entrance is disconnected
Step (4) discharge mode；
(2) it after entering charge mode, judges whether there is charge fault or is full of, filled if so, sending to terminate to charger
Telegram text, 2s cut off the related relay that charges later, re-execute the steps (1) BMS power-supply management system and re-power；If it is not,
Then follow the steps (3)；
(3) it is closed charge relay, charging heating method is executed: powering on initial battery core minimum temperature Tmin > 12 DEG C, is not turned on and adds
Heat is directly entered pure charging；At described Tmin < -28 DEG C of battery core minimum temperature, forbid heating；Heat unlocking condition: battery core is minimum
Temperature Tmin≤12 DEG C；Closedown condition: battery core minimum temperature Tmin >=15 DEG C；When battery core minimum temperature Tmin < 0 DEG C, added
Heat, and do not charge；BMS power control system re-powers after completing the above judgement and movement；
(4) after entering discharge mode, discharge prevention is judged whether there is, and if it exists, then after 1s, disconnect the related relay that discharges
And lock, then return step (1), BMS power-supply management system re-power；Discharge prevention if it does not exist, then be closed preliminary filling after
Electric appliance, closure electric discharge relay after 500ms disconnect preliminary filling relay after 1000ms, then execute step (5) and discharge heating side
Method；
(5) electric discharge heating means: initial battery core minimum temperature Tmin > 5 DEG C are powered on, heating is not turned on, are directly entered pure electric discharge；Electricity
At Tmin < -30 DEG C of core minimum temperature, forbid heating；Heating unlocking condition: initial battery core minimum temperature Tmin≤5 DEG C are powered on；It closes
Close condition: battery core minimum temperature Tmin >=10 DEG C；Initial Tmin < -10 DEG C of battery core minimum temperature and SOC < 20% are powered on, is not closed
Positive relay or the negative relay of heating are heated, and sends fall power instruction to vehicle, cutoff command is sent after 60S, if inspection
It measures discharge current > 30A and continues 8S, disconnect electric discharge relay, relay does not restore；Power on initial battery core minimum temperature Tmin
< -10 DEG C and SOC >=20%, send cutoff command, and closure heats positive relay and heats negative relay and begins to warm up；It powers on just
- 10 DEG C≤Tmin≤5 DEG C of beginning battery core minimum temperature, closure heat positive relay and heat negative relay and begin to warm up；It powers on just
Beginning battery core minimum temperature Tmin > 5 DEG C, pure discharge mode；When Tmin >=10 DEG C, into second of heating judgement, when Tmin≤0 DEG C
When, cutoff command is sent to vehicle, discharge current > 30A continues 8S and disconnects electric discharge relay if detecting；Complete the above movement and
After judgement, BMS power control system is re-powered, then is again introduced into heating judgement.
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