CN113682249A - Charging management system for industrial vehicle lithium battery assembly - Google Patents
Charging management system for industrial vehicle lithium battery assembly Download PDFInfo
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- CN113682249A CN113682249A CN202111004525.9A CN202111004525A CN113682249A CN 113682249 A CN113682249 A CN 113682249A CN 202111004525 A CN202111004525 A CN 202111004525A CN 113682249 A CN113682249 A CN 113682249A
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- lithium battery
- battery assembly
- temperature
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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
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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
- 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 for an industrial vehicle lithium battery assembly. The processor enables the motor controller in the power generation mode to supply power for the heating device when the temperature of the lithium battery assembly is not larger than the minimum charging temperature based on detection data of the temperature detection device, and avoids damage of the heating device by adjusting output current of the motor controller. It is thus clear that the motor controller that is in the electricity generation mode is not made to directly output current in this application, makes heating device heat, but adjusts motor controller's output circuit to the electric current that makes input to heating device is less than and predetermines the electric current, has guaranteed heating device's normal work, also makes motor controller convert mechanical energy into the electric energy and charges for the lithium cell assembly, has improved energy utilization.
Description
Technical Field
The invention relates to the field of battery charging management, in particular to a charging management system for a lithium battery assembly of an industrial vehicle.
Background
Because of the characteristics of the lithium battery, charging the lithium battery at low temperature may cause lithium precipitation on the surface of the battery core of the lithium battery, causing safety accidents such as explosion, and the like, the lithium battery assembly of the vehicle is usually equipped with a heating device, and the electric energy generated by regenerative braking during braking or deceleration of the vehicle supplies power to the heating device, so that the heating device heats the electric energy, and the temperature of the lithium battery assembly rises, so that the lithium battery assembly can be safely charged. However, the regenerative braking power generation energy of the vehicle during operation varies with the load of the vehicle and the vehicle speed, so that the current input to the heating device fluctuates greatly, and the heating device may be burned out when the current reaches a peak value, resulting in damage to the heating device.
Disclosure of Invention
The invention aims to provide a charging management system for a lithium battery assembly of an industrial vehicle, which is characterized in that a motor controller in a power generation mode is not enabled to directly output current to enable a heating device to heat, but an output circuit of the motor controller is adjusted to enable the current input to the heating device to be smaller than a preset current, so that the normal work of the heating device is ensured, mechanical energy is converted into electric energy by the motor controller to charge the lithium battery assembly, and the energy utilization rate is improved.
In order to solve the above technical problem, the present 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 to the heating device by using current smaller than preset current when the temperature of the lithium battery assembly is not higher 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 higher than the preset temperature and the motor controller is in the power generation mode;
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 the mechanical energy of the motor into electric energy;
the temperature detection device is connected with the processor and used for detecting the temperature of the lithium battery assembly;
and the heating device is connected with the motor controller and used for heating when current is input so as to improve the temperature of the lithium battery assembly.
Preferably, the method further comprises the following steps:
the first controllable switch 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 of the second controllable switch is connected with the positive output end of the motor controller and the first end of the first controllable switch, the second end of the second controllable switch is connected with the first end of the heating device, and the control end of the second controllable switch is connected with the processor and used for enabling the motor controller to supply power to the heating device when the second controllable switch 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; when the temperature of the lithium battery assembly rises to be higher than the preset temperature, the motor controller controls the first controllable switch to be closed and controls the second controllable switch to be opened when in the power generation mode.
Preferably, the method further comprises the following steps:
the first end of the third controllable switch is connected with the positive output end of the motor controller, the second end of the third controllable switch is connected with the first end of the heating device, and the control end of the third controllable switch is connected with the processor and used for enabling the motor controller to supply power to the heating device when the third controllable switch is closed;
the first end of the fourth controllable switch is connected with the positive output end of the motor controller, the second end of the fourth controllable switch is connected with the first end of the shunt resistor, and the control end of the fourth controllable switch is connected with the processor and used for enabling the motor controller to supply power to the shunt resistor when the fourth controllable switch 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 used for controlling the output current of the motor controller to be reduced when the output current of the motor controller is detected to be larger than the preset current, controlling the fourth controllable switch to be closed when the output current of the motor controller is not larger than the preset shunt current, and controlling the third controllable switch to be closed when the current output by the motor controller is smaller than the preset current.
Preferably, the heating means comprises:
the safety piece is connected with the second end of the third controllable switch at the first end 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 of the heating film is connected with the second end of the safety piece, and the second end of the heating film is connected with the output negative end of the motor controller and used for heating when current is input so as to improve the temperature of the lithium battery assembly.
Preferably, the processor is further configured to control the motor controller 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 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 a 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 problem, the invention provides a power supply system, which comprises the industrial vehicle lithium battery assembly charging management system and further comprises a lithium battery assembly.
The application provides an industrial vehicle lithium battery assembly charging management system, which comprises a processor, a motor controller, a temperature detection device and a heating device. The processor supplies power to the heating device based on the detection data according to the temperature detection device when the temperature of the lithium battery assembly is not higher than the minimum charging temperature, and outputs current through the motor controller to avoid damage of the heating device. It is thus clear that the motor controller that is in the electricity generation mode is not made to directly output current in this application, makes heating device heat, but adjusts motor controller's output circuit to the electric current that makes input to heating device is less than and predetermines the electric current, has guaranteed heating device's normal work, also makes motor controller convert mechanical energy into the electric energy and charges for the lithium cell assembly, has improved energy utilization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a lithium battery pack charging management system for an industrial vehicle according to the present invention;
fig. 2 is a schematic structural diagram of a charging management system for a lithium battery assembly of an industrial vehicle according to the present invention.
Detailed Description
The core of the invention is to provide a charging management system for a lithium battery assembly of an industrial vehicle, which is characterized in that a motor controller in a power generation mode is not used for directly outputting current to heat a heating device, but an output circuit of the motor controller is adjusted to ensure that the current input to the heating device is smaller than a preset current, so that the normal work of the heating device is ensured, mechanical energy is converted into electric energy by the motor controller to charge the lithium battery assembly, and the energy utilization rate is improved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a charging management system for a lithium battery assembly of an industrial vehicle, the system including:
the processor 1 is used for controlling the motor controller 2 to supply power to the temperature detection device 3 by using a current smaller than a preset current when the temperature of the lithium battery assembly is not greater than a 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 the mechanical energy of the motor into electric energy;
the temperature detection device 3 is connected with the processor 1 and is used for detecting the temperature of the lithium battery assembly;
and the temperature detection device 3 is connected with the motor controller 2 and used for increasing the temperature when current is input so as to improve the temperature of the lithium battery assembly.
The applicant considers that when the motor is decelerated or braked, the motor controller 2 can convert the mechanical energy of the motor into electric energy to be output, in order to fully utilize the electric energy output by the motor controller 2, in the application, the motor controller 2 is connected with the temperature detection device 3, when the temperature of the lithium battery assembly is not more than the minimum charging temperature, the motor controller 2 which processes the power generation mode outputs the electric energy to the temperature detection device 3, and the temperature detection device 3 is heated, so that the temperature of the lithium battery assembly is raised, the lithium battery assembly is normally charged, and accidents such as explosion and the like caused by the charging of the lithium battery assembly at low temperature are avoided.
However, since the weight and the speed of the motor-driven vehicle are different, the magnitude of the current output by the motor controller 2 is also different, and when the current input to the temperature detection device 3 is large, the temperature detection device 3 fails, and the lithium battery assembly cannot be heated normally, or cannot be charged normally.
In order to solve the technical problem, the processor 1 is arranged in the lithium battery pack heating system, the processor 1 can control the current output by the motor controller 2, the current output by the motor controller 2 is controlled to be smaller than the preset current, power supply for the temperature detection device 3 is guaranteed, normal work of the temperature detection device 3 is guaranteed, and the temperature detection device 3 can heat a lithium battery pack normally.
In addition, after the temperature of the lithium battery assembly rises to a temperature value higher than the preset temperature, the lithium battery assembly can be normally charged, the motor controller 2 and the lithium battery assembly can be connected at the moment, the electric energy output by the motor controller 2 can charge the lithium battery assembly, the charging of the lithium battery assembly is realized, 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 the present embodiment may be, but is not limited to, 0 ℃, and the preset temperature may be, but is not limited to, 5 ℃, but the preset temperature needs to be greater than the minimum charging temperature.
In addition, the motor Controller 2 and the processor 1 in the present embodiment may be connected to each other through a CAN (Controller Area Network) bus, but not limited thereto.
In conclusion, the current is not directly output by the motor controller 2 in the power generation mode in the application, the temperature detection device 3 is heated, but the output circuit of the motor controller 2 is adjusted, so that the current input to the temperature detection device 3 is smaller than the preset current, the normal work of the temperature detection device 3 is ensured, the electric energy converted from the mechanical energy by the motor controller 2 is used for charging the lithium battery assembly, and the energy utilization rate is improved.
On the basis of the above-described embodiment:
referring to fig. 2, fig. 2 is a schematic structural diagram of a charging management system for a lithium battery assembly of an industrial vehicle according to the present invention.
As a preferred embodiment, the method further comprises the following steps:
the first controllable switch K1 is used for enabling the motor controller 2 to charge the lithium battery assembly when the motor controller is closed, and is connected with the output positive end of the motor controller 2, the second end of the motor controller is connected with the input positive end of the lithium battery assembly, and the control end of the first controllable switch K1 is connected with the processor 1;
the input negative end of the lithium battery assembly is connected with the output negative end of the motor controller 2;
the first end of the second controllable switch K2 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 of the second controllable switch is connected with the first end of the temperature detection device 3, and the control end of the second controllable switch K2 is connected with the processor 1 and used for enabling the motor controller 2 to supply power to the temperature detection device 3 when the second controllable switch K2 is closed;
the second end of the temperature detection device 3 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 the preset temperature and the motor controller 2 is in the 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 temperature detection device 3, the first controllable switch K1 is arranged between the motor controller 2 and the lithium battery assembly, the second controllable switch K2 is arranged between the motor controller 2 and the temperature detection device 3, 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 motor controller 2 can be controlled to supply power to the temperature detection device 3 but not to charge the lithium battery assembly by controlling the second controllable switch K2 to be closed and the first controllable switch K1 to be open; and when the temperature of the lithium battery assembly is higher than the preset temperature, the temperature detection device 3 does not need to heat the lithium battery assembly, that is, does not need to supply power to the temperature detection device 3, at this time, the first controllable switch K1 is controlled to be closed to enable the motor controller 2 to charge the lithium battery assembly, and the second controllable switch K2 is controlled to be opened to enable the temperature detection device 3 to stop heating.
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, the method further comprises the following steps:
the third controllable switch K3, the first end of which is connected with the positive output end of the motor controller 2, the second end of which is connected with the first end of the temperature detection device 3, and the control end of which is connected with the processor 1, is used for enabling the motor controller 2 to supply power for the temperature detection device 3 when the switch is closed;
the fourth controllable switch K4 is used for enabling the motor controller 2 to supply power to the shunt resistor R1 when the fourth controllable switch K4 is closed, wherein the first end of the fourth controllable switch is connected with the output positive end of the motor controller 2, the second end of the fourth controllable switch is connected with the first end of the shunt resistor R1, and the control end of the fourth controllable switch K4 is connected with the processor 1;
a shunt resistor R1 having a second end connected to the negative output end of the motor controller 2, for shunting the temperature detection device 3 to reduce the current input to the temperature detection device 3;
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 to 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 to 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, in consideration of the fact that when the magnitude of the current output by the motor controller 2 is controlled, the current may not be accurately controlled to be immediately stabilized at a value, in the present application, the shunt resistor R1 is disposed at two ends of the temperature detection device 3, the processor 1 may first reduce the current value output by the motor controller 2 to the preset shunt current, and then close the fourth controllable switch K4, so that the shunt resistor R1 may shunt with the temperature detection device 3, so that the current applied to the temperature detection device 3 is smaller than the preset current, thereby ensuring the normal operation of the temperature detection device 3 and also ensuring the stable reduction of the current of the temperature detection device 3.
The resistance of the shunt resistor R1 can be set to realize that the current of the temperature detection device 3 is smaller than the preset current after being shunted by the temperature detection device 3.
It should be noted that, the first terminal of the third controllable switch K3 in fig. 2 is connected to the second terminal of the second controllable switch K2, and when the second controllable switch K2 is open, even if the third controllable switch K3 is closed, the heating device 4 cannot be powered, so as to further ensure the safety of the heating device 4.
As a preferred embodiment, the temperature detection device 3 includes:
a FUSE having a first end connected to the second end of the third controllable switch K3, for fusing when the current flowing through the FUSE is greater than the maximum heating current; the heating current is greater than the preset current;
and the heating film PTC, the first end of which is connected with the second end of the FUSE, and the second end of which is connected with the negative output end of the motor controller 2, is used for increasing the temperature when current is input so as to improve the temperature of the lithium battery assembly.
In order to avoid damage to the temperature detection device 3 caused by excessive current, the FUSE is provided in the present application, and when the current input to the temperature detection device 3 is greater than the maximum heating current, the FUSE will be blown, the circuit between the temperature detection device 3 and the motor controller 2 is disconnected, the temperature detection device 3 cannot work, and the fault of the temperature detection device 3 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 the temperature of the lithium battery assembly is detected to be 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 higher than the minimum charging temperature, the motor controller 2 can directly charge the electric energy generated during regenerative braking to the lithium battery assembly without heating the lithium battery assembly, thereby improving the full utilization of the electric energy.
As a preferred embodiment, the temperature detection device 3 is a thermistor R2.
The temperature detection device 3 may be, but is not limited to, a thermistor R2, and the processor 1 determines the change in the temperature of the lithium battery pack based on the change in the resistance of the thermistor R2, but the present application is not limited to a specific implementation of the temperature detection device 3.
As a preferred embodiment, the processor 1 is a BMS (Battery Management System).
The BMS that the processor 1 can reuse the lithium battery assembly in this embodiment can not only realize the detection of the state of the lithium battery assembly, but also save the cost for the control of the output current of the motor controller 2.
Of course, the present application does not limit the processor 1 to multiplexing the BMS, and may be a control circuit or a single chip microcomputer separately provided.
As a preferred embodiment, the processor 1 is further configured to control the circuit between the motor controller 2 and the temperature detection device 3 to be opened when the temperature of the lithium battery assembly is greater than a preset temperature, so that the temperature detection device 3 stops heating.
In this embodiment, after the temperature of the lithium battery assembly rises to be higher than the preset temperature, the power supply for the temperature detection device 3 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 end, the processor 1 may control the circuit between the motor controller 2 and the temperature detection device 3 to be disconnected, and may control the circuit between the motor controller 2 and the lithium battery assembly to be connected, so that the lithium battery assembly may supply power to the motor controller 2 in time.
As a preferred embodiment, the lithium battery assembly is connected with the temperature detection device 3;
the processor 1 is further configured to control the lithium battery assembly to output current to the temperature detecting device 3 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.
In consideration of the fact that the temperature detection device 3 cannot be powered when the motor controller 2 does not process the power generation mode, the temperature detection device 3 is powered by the lithium battery assembly in the embodiment, so that the lithium battery assembly is self-heated, and the lithium battery assembly can be charged after the temperature of the lithium battery assembly rises to be higher 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 an introduction of a power supply system provided by the present invention, please refer to the above embodiment of the charging management system for the lithium battery assembly of the industrial vehicle, which is not described herein again.
It is further noted that, in the present 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. Also, 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 an … …" does not exclude the presence of other identical 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 (9)
1. A charging management system for an industrial vehicle lithium battery assembly, comprising:
the processor is used for controlling the motor controller to supply power to the heating device by using current smaller than preset current when the temperature of the lithium battery assembly is not higher 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 higher than the preset temperature and the motor controller is in the power generation mode;
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 the mechanical energy of the motor into electric energy;
the temperature detection device is connected with the processor and used for detecting the temperature of the lithium battery assembly;
and the heating device is connected with the motor controller and used for heating when current is input so as to improve the temperature of the lithium battery assembly.
2. The industrial vehicle lithium battery assembly charge management system of claim 1, further comprising:
the first controllable switch 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 of the second controllable switch is connected with the positive output end of the motor controller and the first end of the first controllable switch, the second end of the second controllable switch is connected with the first end of the heating device, and the control end of the second controllable switch is connected with the processor and used for enabling the motor controller to supply power to the heating device when the second controllable switch 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; when the temperature of the lithium battery assembly rises to be higher than the preset temperature, the motor controller controls the first controllable switch to be closed and controls the second controllable switch to be opened when in the power generation mode.
3. The industrial vehicle lithium battery assembly charge management system of claim 1, further comprising:
the first end of the third controllable switch is connected with the positive output end of the motor controller, the second end of the third controllable switch is connected with the first end of the heating device, and the control end of the third controllable switch is connected with the processor and used for enabling the motor controller to supply power to the heating device when the third controllable switch is closed;
the first end of the fourth controllable switch is connected with the positive output end of the motor controller, the second end of the fourth controllable switch is connected with the first end of the shunt resistor, and the control end of the fourth controllable switch is connected with the processor and used for enabling the motor controller to supply power to the shunt resistor when the fourth controllable switch 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 used for controlling the output current of the motor controller to be reduced when the output current of the motor controller is detected to be larger than the preset current, controlling the fourth controllable switch to be closed when the output current of the motor controller is not larger than the preset shunt current, and controlling the third controllable switch to be closed when the current output by the motor controller is smaller than the preset current.
4. The industrial vehicle lithium battery assembly charge management system of claim 3, wherein the heating device comprises:
the safety piece is connected with the second end of the third controllable switch at the first end 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 of the heating film is connected with the second end of the safety piece, and the second end of the heating film is connected with the output negative end of the motor controller and used for heating when current is input so as to improve the temperature of the lithium battery assembly.
5. 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 charging temperature and the motor controller is in a power generation mode.
6. The industrial vehicle lithium battery pack charge management system of claim 1, wherein the temperature sensing device is a thermistor.
7. The industrial vehicle lithium battery assembly charge management system of claim 1, wherein the processor is a Battery Management System (BMS).
8. The system of claim 1, wherein the processor is further configured to control the motor controller to open a circuit with the heating device to stop heating the heating device when the temperature of the lithium battery assembly is greater than the predetermined temperature.
9. The industrial vehicle lithium battery assembly charge management system of any of claims 1-8, 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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