CN113682249B - Industrial vehicle lithium battery assembly charging management system - Google Patents
Industrial vehicle lithium battery assembly charging management system Download PDFInfo
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- CN113682249B CN113682249B CN202111004525.9A CN202111004525A CN113682249B CN 113682249 B CN113682249 B CN 113682249B CN 202111004525 A CN202111004525 A CN 202111004525A CN 113682249 B CN113682249 B CN 113682249B
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- motor controller
- lithium battery
- battery assembly
- temperature
- heating device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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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
- 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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- 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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
-
- 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
- B60L2200/00—Type of vehicles
- B60L2200/40—Working vehicles
- B60L2200/44—Industrial trucks or floor conveyors
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/44—Control modes by parameter estimation
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a charging management system of an industrial vehicle lithium battery assembly, which comprises a processor, a motor controller, a temperature detection device and a heating device. The processor enables the motor controller in the power generation mode to supply power to the heating device based on detection data of the temperature detection device when the temperature of the lithium battery assembly is not greater than the minimum charging temperature, and prevents the heating device from being damaged by adjusting output current of the motor controller, and enables the motor controller in the power generation mode to charge the lithium battery assembly when the temperature of the lithium battery assembly rises to be greater than the preset temperature. Therefore, in the application, the motor controller in the power generation mode directly outputs current, so that the heating device heats, but the output circuit of the motor controller is adjusted, so that the current input to the heating device is smaller than the preset current, the normal operation of the heating device is ensured, the motor controller converts mechanical energy into electric energy to charge the lithium battery assembly, and the energy utilization rate is improved.
Description
Technical Field
The invention relates to the field of battery charging management, in particular to a charging management system for an industrial vehicle lithium battery assembly.
Background
Because of the characteristics of the lithium battery, charging the lithium battery at a low temperature may cause lithium to be separated from the surface of the battery core of the lithium battery and cause safety accidents such as explosion, in general, the lithium battery assembly of a vehicle is equipped with a heating device, and the heating device is powered by electric energy generated by regenerative braking when the vehicle brakes or decelerates, so that the heating device heats, thereby raising the temperature of the lithium battery assembly, so as to safely charge the lithium battery assembly. However, the regenerative braking power generation energy of the vehicle during running can be changed along with the change of the load and the speed of the vehicle, so that the current input to the heating device can be fluctuated greatly, and the heating device can be burnt out when the current reaches a peak value, so that the heating device is damaged.
Disclosure of Invention
The invention aims to provide an industrial vehicle lithium battery assembly charging management system, which is characterized in that a motor controller in a power generation mode directly outputs current, a heating device is heated, an output circuit of the motor controller is adjusted, so that the current input to the heating device is smaller than a preset current, the normal operation of the heating device is ensured, the motor controller is also enabled to convert mechanical energy into electric energy to charge a lithium battery assembly, and the energy utilization rate is improved.
In order to solve the technical problems, the invention provides a charging management system for an industrial vehicle lithium battery assembly, comprising:
the processor is used for controlling the motor controller to supply power for the heating device by using a current smaller than a preset current when the temperature of the lithium battery assembly is not larger than the minimum charging temperature and the motor controller is in a power generation mode, and controlling the motor controller to charge the lithium battery assembly when the temperature of the lithium battery assembly rises to be larger than the preset temperature;
the motor controller is connected with the motor, the processor and the lithium battery assembly and is used for working in the power generation mode when the motor is decelerated or braked so as to convert mechanical energy of the motor into electric energy;
the temperature detection device is connected with the processor and is used for detecting the temperature of the lithium battery assembly;
and the heating device is connected with the motor controller and is used for heating when current is input so as to increase the temperature of the lithium battery assembly.
Preferably, the method further comprises:
the first end is connected with the output positive end of the motor controller, the second end is connected with the input positive end of the lithium battery assembly, and the control end is connected with the first controllable switch of the processor and is used for enabling the motor controller to charge the lithium battery assembly when the motor controller is closed;
the input negative end of the lithium battery assembly is connected with the output negative end of the motor controller;
the first end is connected with the output positive end of the motor controller and the first end of the first controllable switch, the second end is connected with the first end of the heating device, and the control end is connected with the second controllable switch of the processor and is used for enabling the motor controller to supply power for the heating device when the motor controller is closed;
the second end of the heating device is connected with the output negative end of the motor controller;
the processor is specifically configured to control the second controllable switch to be closed and control the first controllable switch to be opened when the temperature of the lithium battery assembly is not greater than the minimum charging temperature and the motor controller is in a power generation mode; and when the temperature of the lithium battery assembly rises to be higher than the preset temperature, and the motor controller is in the power generation mode, controlling the first controllable switch to be closed and controlling the second controllable switch to be opened.
Preferably, the method further comprises:
the first end is connected with the positive output end of the motor controller, the second end is connected with the first end of the heating device, and the control end is connected with the third controllable switch of the processor and is used for enabling the motor controller to supply power for the heating device when the motor controller is closed;
the first end is connected with the output positive end of the motor controller, the second end is connected with the first end of the shunt resistor, and the control end is connected with the fourth controllable switch of the processor and is used for enabling the motor controller to supply power for the shunt resistor when the motor controller is closed;
the shunt resistor is connected with the output negative end of the motor controller at the second end and is used for shunting the heating device so as to reduce the current input to the heating device;
the processor is further configured to control the output current of the motor controller to decrease when the output current of the motor controller is detected to be greater than the preset current, and control the fourth controllable switch to close when the output current of the motor controller is not greater than the preset shunt current, and control the third controllable switch to close when the output current of the motor controller is less than the preset current.
Preferably, the heating device comprises:
the first end of the safety piece is connected with the second end of the third controllable switch and is used for fusing when the current flowing through the safety piece is larger than the maximum heating current; the heating current is greater than the preset current;
the first end is connected with the second end of rupture disc, the second end with the heating film that the output negative terminal of motor controller is connected for when there is the electric current input, the intensify, in order to improve the temperature of lithium cell assembly.
Preferably, the processor is further configured to control the motor controller to charge the lithium battery assembly when the temperature of the lithium battery assembly is detected to be greater than the minimum charging temperature and the motor controller is in a power generation mode.
Preferably, the temperature detection device is a thermistor.
Preferably, the processor is a battery management system BMS.
Preferably, the processor is further configured to control the electric circuit between the motor controller and the heating device to be disconnected when the temperature of the lithium battery assembly is greater than the preset temperature, so that the heating device stops heating.
Preferably, the lithium battery assembly is connected with the heating device;
the processor is further configured to control the lithium battery assembly to output current to the heating device when the temperature of the lithium battery assembly is not greater than a minimum charging temperature and the motor controller is not in the power generation mode.
In order to solve the technical problems, the invention provides a power supply system, which comprises the industrial vehicle lithium battery assembly charging management system and a lithium battery assembly.
The application provides an industrial vehicle lithium battery assembly charge management system, which comprises a processor, a motor controller, a temperature detection device and a heating device. The processor enables the motor controller in the power generation mode to supply power to the heating device based on detection data of the temperature detection device when the temperature of the lithium battery assembly is not greater than the minimum charging temperature, and prevents the heating device from being damaged by adjusting output current of the motor controller, and enables the motor controller in the power generation mode to charge the lithium battery assembly when the temperature of the lithium battery assembly rises to be greater than the preset temperature. Therefore, in the application, the motor controller in the power generation mode directly outputs current, so that the heating device heats, but the output circuit of the motor controller is adjusted, so that the current input to the heating device is smaller than the preset current, the normal operation of the heating device is ensured, the motor controller converts mechanical energy into electric energy to charge the lithium battery assembly, and the energy utilization rate is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a charging management system for an industrial vehicle lithium battery assembly according to the present invention;
fig. 2 is a schematic diagram of a specific structure of a charging management system for an industrial vehicle lithium battery assembly according to the present invention.
Detailed Description
The invention is characterized in that the invention provides a charging management system of an industrial vehicle lithium battery assembly, which is characterized in that a motor controller in a power generation mode directly outputs current, a heating device is heated, an output circuit of the motor controller is adjusted, so that the current input to the heating device is smaller than a preset current, the normal operation of the heating device is ensured, the motor controller is also enabled to convert mechanical energy into electric energy to charge the lithium battery assembly, and the energy utilization rate is improved.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a charging management system for an industrial vehicle lithium battery assembly according to the present invention, where the system includes:
the processor 1 is used for controlling the motor controller 2 to supply power to the heating device 4 by a current smaller than a preset current when the temperature of the lithium battery assembly is not greater than the minimum charging temperature and the motor controller 2 is in a power generation mode, and controlling the motor controller 2 to charge the lithium battery assembly when the temperature of the lithium battery assembly rises to be greater than the preset temperature and the motor controller 2 is in the power generation mode;
the motor controller 2 is respectively connected with the motor, the processor 1 and the lithium battery assembly and is used for working in a power generation mode when the motor is decelerated or braked so as to convert mechanical energy of the motor into electric energy;
a temperature detecting device 3 connected with the processor 1 and used for detecting the temperature of the lithium battery assembly;
and the heating device 4 is connected with the motor controller 2 and is used for heating when current is input so as to increase the temperature of the lithium battery assembly.
The applicant considers that when the motor is decelerating or braking, the motor controller 2 can convert the mechanical energy of the motor into electric energy for output, in order to fully utilize the electric energy output by the motor controller 2, the motor controller 2 and the heating device 4 are connected in the application, when the temperature of the lithium battery assembly is not greater than the minimum charging temperature, the motor controller 2 for processing the power generation mode outputs the electric energy to the heating device 4, and the heating device 4 heats up, so that the temperature of the lithium battery assembly is increased, so as to charge the lithium battery assembly normally, and accidents such as explosion caused by charging when the lithium battery assembly is low in temperature are avoided.
However, since the weight and the speed of the motor-driven vehicle are different, the magnitude of the current output from the motor controller 2 is also different, and when the current input to the heating device 4 is large, the heating device 4 may malfunction, and the lithium battery assembly may not be heated or charged normally.
In order to solve the technical problem, the application is provided with the processor 1, the processor 1 can control the current output by the motor controller 2, and the current output by the motor controller 2 is controlled to be smaller than the preset current, so that the power supply for the heating device 4 is ensured, the normal work of the heating device 4 is ensured, and the heating device 4 can normally heat the lithium battery assembly.
In addition, after the temperature of the lithium battery assembly rises to a temperature value which is greater than a preset temperature, the lithium battery assembly can be normally charged, the motor controller 2 can be connected with the lithium battery assembly at the moment, the electric energy output by the motor controller 2 can charge the lithium battery assembly, so that the lithium battery assembly is charged, the electric energy generated during regenerative braking is fully utilized, and the energy is saved.
It should be noted that, the minimum charging temperature in this embodiment may be, but not limited to, 0 ℃, and the preset temperature may be, but not limited to, 5 ℃, but the preset temperature needs to be greater than the minimum charging temperature.
Further, the motor controller 2 and the processor 1 in the present embodiment may be connected by a CAN (Controller Area Network ) bus, but not limited thereto.
In summary, in the present application, instead of directly outputting current by the motor controller 2 in the power generation mode, the heating device 4 is heated, and the output circuit of the motor controller 2 is adjusted, so that the current input to the heating device 4 is smaller than the preset current, normal operation of the heating device 4 is ensured, and the motor controller 2 also converts the mechanical energy into electric energy to charge the lithium battery assembly, thereby improving the energy utilization rate.
Based on the above embodiments:
referring to fig. 2, fig. 2 is a schematic diagram showing a specific structure of a charging management system for an industrial vehicle lithium battery assembly according to the present invention.
As a preferred embodiment, further comprising:
the first end is connected with the output positive end of the motor controller 2, the second end is connected with the input positive end of the lithium battery assembly, and the control end is connected with the first controllable switch K1 of the processor 1 and used for enabling the motor controller 2 to charge the lithium battery assembly when being closed;
the input negative end of the lithium battery assembly is connected with the output negative end of the motor controller 2;
the first end is connected with the positive output end of the motor controller 2 and the first end of the first controllable switch K1, the second end is connected with the first end of the heating device 4, and the control end is connected with the second controllable switch K2 of the processor 1 and is used for enabling the motor controller 2 to supply power to the heating device 4 when being closed;
the second end of the heating device 4 is connected with the output negative end of the motor controller 2;
the processor 1 is specifically configured to control the second controllable switch K2 to be closed and control the first controllable switch K1 to be opened when the temperature of the lithium battery assembly is not greater than the minimum charging temperature and the motor controller 2 is in the power generation mode; when the temperature of the lithium battery assembly rises to be higher than a preset temperature and the motor controller 2 is in a power generation mode, the first controllable switch K1 is controlled to be closed, and the second controllable switch K2 is controlled to be opened.
In this embodiment, when the motor controller 2 is controlled to supply power to the lithium battery assembly and the motor controller 2 is controlled to supply power to the heating device 4, a first controllable switch K1 is arranged between the motor controller 2 and the lithium battery assembly, a second controllable switch K2 is arranged between the motor controller 2 and the heating device 4, and when the temperature of the lithium battery assembly is not greater than the minimum charging temperature and the motor controller 2 is in the power generation mode, the second controllable switch K2 is controlled to be closed, the first controllable switch K1 is opened, so that the motor controller 2 can be controlled to supply power to the heating device 4 but not to charge the lithium battery assembly; when the temperature of the lithium battery assembly is greater than the preset temperature, the heating device 4 does not need to heat the lithium battery assembly, that is, the heating device 4 does not need to be powered, at this time, the motor controller 2 charges the lithium battery assembly by controlling the first controllable switch K1 to be closed, and the heating device 4 stops heating by controlling the second controllable switch K2 to be opened.
Therefore, the control mode in the embodiment is simpler and more convenient, and the electric energy can be more fully utilized, so that the electric energy generated during regenerative braking is charged by the lithium battery assembly.
As a preferred embodiment, further comprising:
the first end is connected with the positive output end of the motor controller 2, the second end is connected with the first end of the heating device 4, and the control end is connected with a third controllable switch K3 of the processor 1 and used for enabling the motor controller 2 to supply power to the heating device 4 when being closed;
the first end is connected with the output positive end of the motor controller 2, the second end is connected with the first end of the shunt resistor R1, and the control end is connected with a fourth controllable switch K4 of the processor 1 and used for enabling the motor controller 2 to supply power to the shunt resistor R1 when the motor controller is closed;
a shunt resistor R1 with a second end connected with the output negative end of the motor controller 2, and is used for shunting the heating device 4 so as to reduce the current input to the heating device 4;
the processor 1 is further configured to control the output current of the motor controller 2 to decrease when detecting that the output current of the motor controller 2 is greater than the preset current, and control the fourth controllable switch K4 to close when the output current of the motor controller 2 is not greater than the preset shunt current, and control the third controllable switch K3 to close when the output current of the motor controller 2 is less than the preset current.
In this embodiment, the applicant considers that there may be a problem that the current cannot be accurately controlled to be immediately stabilized at a value when controlling the magnitude of the current output by the motor controller 2, in this application, the shunt resistor R1 is disposed at two ends of the heating device 4, the processor 1 may first reduce the current value output by the motor controller 2 to a preset shunt current, and then close the fourth controllable switch K4, so that the shunt resistor R1 and the heating device 4 may shunt, so that the current added to the heating device 4 is smaller than the preset current, ensuring normal operation of the heating device 4, and also ensuring stable decrease of the current of the heating device 4.
Wherein, the resistance value of the shunt resistor R1 can be set to realize that the current of the heating device 4 is smaller than the preset current after the shunt of the heating device 4.
It should be noted that, in fig. 2, the first end of the third controllable switch K3 is connected to the second end of the second controllable switch K2, and when the second controllable switch K2 is opened, even if the third controllable switch K3 is closed, the heating device 4 cannot obtain electricity, so that the safety of the heating device 4 is further ensured.
As a preferred embodiment, the heating device 4 comprises:
a FUSE piece FUSE with a first end connected with a second end of the third controllable switch K3, and used for fusing when the current flowing through the FUSE piece FUSE is larger than the maximum heating current; the heating current is larger than the preset current;
the first end is connected with the second end of rupture disc FUSE, and the second end is connected with the heating film PTC of the output negative terminal of motor controller 2 for the temperature is risen when there is the electric current input, in order to improve the temperature of lithium cell assembly.
In order to avoid damage to the heating device 4 caused by overlarge current, the FUSE is arranged in the application, when the current input to the heating device 4 is larger than the maximum heating current, the FUSE is fused, a circuit between the heating device 4 and the motor controller 2 is disconnected, the heating device 4 cannot work, and the fault of the heating device 4 is avoided.
As a preferred embodiment, the processor 1 is further configured to control the motor controller 2 to charge the lithium battery assembly when it is detected that the temperature of the lithium battery assembly is greater than the minimum charging temperature and the motor controller 2 is in the power generation mode.
In this embodiment, when the temperature of the lithium battery assembly is greater than the minimum charging temperature, the electric energy generated during regenerative braking can be directly charged into the lithium battery assembly by the motor controller 2 without heating the lithium battery assembly, so that the full utilization of the electric energy is improved.
As a preferred embodiment, the temperature detecting device 3 is a thermistor R2.
The temperature detecting device 3 may be, but is not limited to, a thermistor R2, and the processor 1 determines a change in the temperature of the lithium battery assembly based on a change in the resistance value of the thermistor R2, but the specific implementation of the temperature detecting device 3 is not limited in this application.
As a preferred embodiment, the processor 1 is a BMS (Battery Management System ).
The processor 1 in this embodiment can reuse the BMS of the lithium battery assembly, not only can realize detection of the state of the lithium battery assembly, but also can control the output current of the motor controller 2, and can save the cost.
Of course, the present application does not limit the processor 1 to multiplexing the BMS, but may be a control circuit or a single chip microcomputer that is additionally provided.
As a preferred embodiment, the processor 1 is further configured to control the electric circuit between the motor controller 2 and the heating device 4 to stop heating the heating device 4 when the temperature of the lithium battery assembly is greater than a preset temperature.
In this embodiment, after the temperature of the lithium battery assembly rises to be greater than the preset temperature, the power supply to the heating device 4 can be stopped, and the electric energy is fully charged for the lithium battery assembly, so that the utilization rate of the electric energy is improved.
In addition, when the motor controller 2 informs the processor 1 that the power generation mode is about to be finished, the processor 1 can control the circuit between the motor controller 2 and the heating device 4 to be disconnected, and the circuit between the motor controller 2 and the lithium battery assembly is conducted, so that the lithium battery assembly can timely supply power to the motor controller 2.
As a preferred embodiment, the lithium battery assembly is connected to the heating device 4;
the processor 1 is further configured to control the lithium battery assembly to output current to the heating device 4 when the temperature of the lithium battery assembly is not greater than the minimum charging temperature and the motor controller 2 is not in the power generation mode.
The applicant considers that the heating device 4 cannot be powered when the motor controller 2 is not in the power generation mode, and in this embodiment, the lithium battery assembly is powered by the heating device 4 to realize self-heating of the lithium battery assembly, and the lithium battery assembly can be charged after the temperature of the lithium battery assembly rises to be greater than the preset temperature.
The power supply system comprises the industrial vehicle lithium battery assembly charging management system and further comprises a lithium battery assembly.
For the description of the power supply system provided by the present invention, reference is made to the above embodiment of the charging management system for the lithium battery assembly of the industrial vehicle, and the description of the present invention is omitted herein.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. An industrial vehicle lithium battery assembly charge management system, comprising:
the processor is used for controlling the motor controller to supply power for the heating device by using a current smaller than a preset current when the temperature of the lithium battery assembly is not larger than the minimum charging temperature and the motor controller is in a power generation mode, and controlling the motor controller to charge the lithium battery assembly when the temperature of the lithium battery assembly rises to be larger than the preset temperature;
the motor controller is connected with the motor, the processor and the lithium battery assembly and is used for working in the power generation mode when the motor is decelerated or braked so as to convert mechanical energy of the motor into electric energy;
the temperature detection device is connected with the processor and is used for detecting the temperature of the lithium battery assembly;
the heating device is connected with the motor controller and is used for heating when current is input so as to increase the temperature of the lithium battery assembly;
the first end is connected with the positive output end of the motor controller, the second end is connected with the first end of the heating device, and the control end is connected with the third controllable switch of the processor and is used for enabling the motor controller to supply power for the heating device when the motor controller is closed;
the first end is connected with the output positive end of the motor controller, the second end is connected with the first end of the shunt resistor, and the control end is connected with the fourth controllable switch of the processor and is used for enabling the motor controller to supply power for the shunt resistor when the motor controller is closed;
the shunt resistor is connected with the output negative end of the motor controller at the second end and is used for shunting the heating device so as to reduce the current input to the heating device;
the processor is further configured to control the output current of the motor controller to decrease when the output current of the motor controller is detected to be greater than the preset current, and control the fourth controllable switch to close when the output current of the motor controller is not greater than the preset shunt current, and control the third controllable switch to close when the output current of the motor controller is less than the preset current.
2. The industrial vehicle lithium battery assembly charge management system of claim 1, further comprising:
the first end is connected with the output positive end of the motor controller, the second end is connected with the input positive end of the lithium battery assembly, and the control end is connected with the first controllable switch of the processor and is used for enabling the motor controller to charge the lithium battery assembly when the motor controller is closed;
the input negative end of the lithium battery assembly is connected with the output negative end of the motor controller;
the first end is connected with the output positive end of the motor controller and the first end of the first controllable switch, the second end is connected with the first end of the heating device, and the control end is connected with the second controllable switch of the processor and is used for enabling the motor controller to supply power for the heating device when the motor controller is closed;
the second end of the heating device is connected with the output negative end of the motor controller;
the processor is specifically configured to control the second controllable switch to be closed and control the first controllable switch to be opened when the temperature of the lithium battery assembly is not greater than the minimum charging temperature and the motor controller is in a power generation mode; and when the temperature of the lithium battery assembly rises to be higher than the preset temperature, and the motor controller is in the power generation mode, controlling the first controllable switch to be closed and controlling the second controllable switch to be opened.
3. The industrial vehicle lithium battery assembly charge management system of claim 1, wherein the heating device comprises:
the first end of the safety piece is connected with the second end of the third controllable switch and is used for fusing when the current flowing through the safety piece is larger than the maximum heating current; the heating current is greater than the preset current;
the first end is connected with the second end of rupture disc, the second end with the heating film that the output negative terminal of motor controller is connected for when there is the electric current input, the intensify, in order to improve the temperature of lithium cell assembly.
4. The industrial vehicle lithium battery assembly charge management system of claim 1 wherein the processor is further configured to control the motor controller to charge the lithium battery assembly when the temperature of the lithium battery assembly is detected to be greater than the minimum charge temperature and the motor controller is in a power generation mode.
5. The industrial vehicle lithium battery assembly charge management system of claim 1, wherein the temperature detection device is a thermistor.
6. The industrial vehicle lithium battery assembly charge management system of claim 1, wherein the processor is a battery management system BMS.
7. The industrial vehicle lithium battery assembly charge management system of claim 1 wherein the processor is further configured to control the circuit between the motor controller and the heating device to cease heating by the heating device when the temperature of the lithium battery assembly is greater than the preset temperature.
8. The industrial vehicle lithium battery assembly charge management system of any one of claims 1-7, wherein the lithium battery assembly is connected to the heating device;
the processor is further configured to control the lithium battery assembly to output current to the heating device when the temperature of the lithium battery assembly is not greater than a minimum charging temperature and the motor controller is not in the power generation mode.
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