CN110962687B - Fork truck vehicle-mounted power supply system and fork truck charging system - Google Patents
Fork truck vehicle-mounted power supply system and fork truck charging system Download PDFInfo
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- CN110962687B CN110962687B CN201911407557.6A CN201911407557A CN110962687B CN 110962687 B CN110962687 B CN 110962687B CN 201911407557 A CN201911407557 A CN 201911407557A CN 110962687 B CN110962687 B CN 110962687B
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- 238000004891 communication Methods 0.000 claims abstract description 93
- 238000001514 detection method Methods 0.000 claims abstract description 82
- 238000007599 discharging Methods 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- 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
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging 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
- B60L53/20—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 converters located in the vehicle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a forklift truck-mounted power supply device and a forklift truck charging system. The voltage detection module is arranged on the side of the forklift truck-mounted power supply device to detect the voltage drop value between the two communication terminals of the charging connector female head, the resistor R0 is connected in series between the two communication terminals of the forklift truck charging device side charging connector male head, when the charging connector is in a connection state, the voltage detection module detects the first voltage drop value of the resistor R0 falling into a preset interval, and therefore the battery management module controls the battery module to be prevented from discharging. At this time, even when the forklift key is in the inserted state, the forklift is not started. When guaranteeing that fork truck on-vehicle battery device is connected with fork truck charging device, fork truck operating personnel can not start fork truck. Effectively prevent to forget to pull out the disconnected charging connector before the fork truck operator restarts the fork truck, lead to fork truck charging device or fork truck charging connection line to be damaged. And further, the potential safety hazard of the operation buried in the subsequent charging operation is avoided.
Description
Technical Field
The invention relates to the field of electric automobile charging, in particular to a forklift truck-mounted power supply device and a forklift truck charging system.
Background
The forklift is used as special vehicle equipment and is applied to various departments in national economy such as stations, ports, airports, factories and warehouses. With the development of electric motor-driven private automobiles, fork-lift trucks have recently entered the electric age.
When the forklift is charged, the charging connector male head on the forklift charging device is connected with the charging connector female head arranged on the forklift to charge the forklift. In the process of charging the forklift-mounted power supply device, the inventor finds that at least the following problems exist in the conventional technology: in order to reasonably utilize manpower and material resources, a forklift operator is often arranged to perform other works after the forklift is charged, and some units can also perform the handover of two shift forklift operators when the forklift is charged. After the forklift is charged, the situation that the charging connector is forgotten to be pulled out before the forklift is restarted by a forklift operator often occurs, so that a forklift charging device or a forklift charging connection line is damaged, and potential safety hazards are buried in subsequent charging operation.
Disclosure of Invention
Based on the problems, the device damage and the potential safety hazard caused by the fact that a worker opens the forklift under the condition that the charging connector is not pulled out are needed to provide the forklift vehicle-mounted power supply device and the forklift charging system.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides a forklift truck-mounted power supply device, including: the battery module, the battery management module, the voltage detection module and the charging connector female head;
The charging end of the battery module is connected with the charging terminal of the charging connector female head, and the discharging controlled end of the battery module is connected with the forklift power system; the discharging control end of the battery management module is connected with the discharging controlled end of the battery module, the first communication end of the battery management module is connected with the first communication terminal of the charging connector female head, and the second communication end of the battery management module is connected with the second communication terminal of the charging connector female head;
The first detection end of the voltage detection module is respectively connected with the first communication terminal of the charging connector female head, the low-voltage power supply end of the battery management module and the first communication end of the battery management module, the second detection end of the voltage detection module is respectively connected with the second communication terminal of the charging connector female head, the second communication end of the battery management module and is grounded, and the detection output end of the voltage detection module is connected with the voltage detection end of the battery management module;
The charging connector female head is correspondingly arranged with a charging connector male head on the forklift charging device, a charging terminal of the charging connector female head is used for being connected with a charging terminal of the charging connector male head, a first communication terminal of the charging connector female head is used for being connected with a first communication terminal of the charging connector male head, a second communication terminal of the charging connector female head is used for being connected with a second communication terminal of the charging connector male head, and the first communication terminal and the second communication terminal of the charging connector male head are connected through a resistor R0;
When the charging connector female head is connected with the charging connector male head, the voltage detection module detects a first voltage drop value of the resistor R0, and if the first voltage drop value is within a preset interval, the battery management module controls the battery module not to discharge.
In one embodiment, when the charging connector is in the connection state, the voltage detection module is configured to detect a first voltage drop value, and when the first voltage drop value is within a preset interval, send a first voltage detection signal to the battery management module, where the first voltage detection signal is configured to indicate that the charging connector is in the connection state.
In one embodiment, the charging control end of the battery management module is connected to the charging controlled end of the battery module, when the charging connector female head and the charging connector male head are disconnected, the voltage detection module is used for detecting and obtaining a second voltage drop value between the first communication terminal and the second communication terminal of the charging connector female head, and if the second voltage drop value is greater than a preset threshold value and a vehicle key of the forklift is in an inserted state, the battery management module controls the battery module to discharge and not charge.
In one embodiment, the first detection terminal of the voltage detection module is connected to the low voltage supply terminal of the battery management module through a resistor R1.
In one embodiment, the first communication end of the battery management module is connected to the first communication terminal of the charging connector female through a capacitor C1, and the second communication end of the battery management module is connected to the second communication terminal of the charging connector female through a capacitor C2.
In one embodiment, the voltage detection module includes an ADC circuit.
In one embodiment, a battery module includes a charge switch, a discharge switch and a battery cell,
The controlled end of the charging switch is connected with the charging control end of the battery management module, the input end of the charging switch is connected with the charging terminal of the charging connector female head, and the output end of the charging switch is connected with the charging end of the battery unit;
The controlled end of the discharging switch is connected with the discharging control end of the battery management module, the input end of the discharging switch is connected with the discharging end of the battery unit, and the output end of the discharging switch is connected with the forklift power system.
In one embodiment, the charging connector is a REMA320 connector.
On the other hand, the embodiment of the invention also provides a forklift charging system, which comprises a forklift charging device and the forklift vehicle-mounted power supply device, wherein the forklift charging device is provided with a charging connector male head, and a first communication terminal and a second communication terminal of the charging connector male head are connected through a resistor R0.
One of the above technical solutions has the following advantages and beneficial effects:
The voltage detection module is arranged on the side of the forklift truck-mounted power supply device to detect the voltage drop value between the two communication terminals of the charging connector female head, the resistor R0 is connected in series between the two communication terminals of the forklift truck charging device side charging connector male head, when the charging connector is in a connection state, the voltage detection module detects the first voltage drop value of the resistor R0 falling into a preset interval, and therefore the battery management module controls the battery module to be prevented from discharging. At this time, even when the forklift key is in the inserted state, the forklift is not started. When guaranteeing that fork truck on-vehicle battery device is connected with fork truck charging device, fork truck operating personnel can not start fork truck. Effectively prevent to forget to pull out the disconnected charging connector before the fork truck operator restarts the fork truck, lead to fork truck charging device or fork truck charging connection line to be damaged. And further, the potential safety hazard of the operation buried in the subsequent charging operation is avoided.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intentionally drawn to scale on actual size or the like, with emphasis on illustrating the principles of the invention.
FIG. 1 is a schematic diagram of a forklift truck power supply device according to an embodiment;
Fig. 2 is a schematic structural diagram of a forklift truck power supply device according to another embodiment;
Fig. 3 is a schematic structural diagram of a battery module of a forklift truck-mounted power supply device according to another embodiment;
FIG. 4 is a schematic diagram of a REMA320 connector in one embodiment;
FIG. 5 is a schematic diagram of a female/male terminal arrangement of a REMA320 connector in one embodiment
Fig. 6 is a schematic circuit diagram of a forklift charging system according to an embodiment.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In one aspect, as shown in fig. 1, an embodiment of the present invention provides a forklift truck-mounted power supply device 100, including: battery module 110, battery management module 120, voltage detection module 130, and charging connector female 140.
The charging end a of the battery module 110 is connected with the charging terminal b of the charging connector female head 140, and the discharging end c of the battery module 110 is connected with the forklift power system 300; the discharging control end d of the battery management module 120 is connected to the discharging controlled end e of the battery module 110, the first communication end f of the battery management module 120 is connected to the first communication terminal g of the charging connector female head 140, and the second communication end h of the battery management module 120 is connected to the second communication terminal i of the charging connector female head 140.
The first detection end j of the voltage detection module 130 is respectively connected with the first communication terminal g of the charging connector female head 140, the low-voltage power supply end z of the battery management module and the first communication end f of the battery management module 120, the second detection end k of the voltage detection module 130 is respectively connected with the second communication terminal i of the charging connector female head 140, the second communication end h of the battery management module 120 and is grounded, and the detection output end l of the voltage detection module 130 is connected with the voltage detection end m of the battery management module 120.
The charging connector female head 140 is arranged corresponding to the charging connector male head 210 on the forklift charging device 200, a charging terminal b of the charging connector female head 140 is used for being connected with a charging terminal n of the charging connector male head 210, a first communication terminal g of the charging connector female head 140 is used for being connected with a first communication terminal o of the charging connector male head 210, a second communication terminal i of the charging connector female head 140 is used for being connected with a second communication terminal p of the charging connector male head 210, and the first communication terminal o and the second communication terminal p of the charging connector male head 210 are connected through a resistor R0.
When the charging connector female connector 140 is connected to the charging connector male connector 210, the voltage detection module 130 detects a first voltage drop value at two sides of the resistor R0, and if the first voltage drop value is within a preset interval, the battery management module 120 controls the battery module 110 not to discharge.
The low-voltage power supply terminal z of the battery management module is a pin or a port of the battery management module, which can provide a low-voltage stable voltage source and can provide constant voltage with any value of 3V-12V. Specifically, when the charging connector is in the connected state, the first detection end j of the voltage detection module 130 is connected to the low voltage power supply end z of the battery management module, and the current enters the first communication terminal o of the charging connector male head 210 through the first communication terminal g of the charging connector female head 140, and then reaches the resistor R0. The first voltage drop values at two sides of the resistor R0 are detected by the voltage detection module 130 through the resistor R0, the second communication terminal p of the charging connector male head 210 and the second communication terminal i of the charging connector female head 140, and if the first voltage drop values are within the preset interval, the battery management module 120 sends a control instruction to the discharging controlled end e of the battery module 110 through the discharging control end, so as to control the battery module 110 not to discharge.
Based on the forklift truck-mounted power supply device 100 provided in the above embodiment, the voltage detection module 130 is disposed on the forklift truck-mounted power supply device 100 side to detect the voltage drop value between the two communication terminals of the charging connector female head 140, and the resistor R0 is connected in series between the two communication terminals of the charging connector male head on the forklift truck charging device 200 side, when the charging connector is in the connection state, the voltage detection module 130 detects the first voltage drop value of the resistor R0 falling into the preset interval, so that the battery management module 120 controls the battery module 110 to not discharge. At this time, even when the forklift key is in the inserted state, the forklift is not started. When the forklift vehicle-mounted battery device is connected with the forklift charging device 200, the forklift operator cannot start the forklift. Effectively prevent to forget to pull out the charging connector before the forklift operator restarts the forklift, lead to the forklift charging device 200 or the forklift charging connection line to be damaged. And further, the potential safety hazard of the operation buried in the subsequent charging operation is avoided.
The above-mentioned operation of determining whether the first voltage drop value falls within the preset interval may be performed in the voltage detection module 130 or may be performed in the battery management module 120.
In one embodiment, when the charging connector is in the connected state, the voltage detection module 130 detects a first voltage drop value of the resistor R0 and outputs the first voltage drop value to the voltage detection terminal m of the battery management module 120 through the detection output terminal. After receiving the first voltage drop value, the battery management module 120 determines whether the first voltage drop value falls within a preset interval, and if yes, controls the battery module 110 to not discharge.
In another embodiment, when the charging connector is in the connection state, the voltage detection module 130 is configured to detect a first voltage drop value of the resistor R0 and determine whether the first voltage drop value is within a preset interval, if yes, send a first voltage detection signal to the voltage detection terminal m of the battery management module 120 through the detection output terminal l, where the first voltage detection signal is configured to indicate that the charging connector is in the connection state. The first voltage detection signal indicates that the first voltage drop value is within the preset area, and is independent of the magnitude of the first voltage drop value within the preset area, for example, the first voltage detection signal may be a high level signal. The battery management module 120 receives the high level signal, i.e., transmits a control signal, and controls the battery module 110 not to discharge.
In one embodiment, as shown in fig. 2, the charging control terminal q of the battery management module 120 is connected to the charging control terminal r of the battery module 110, when the charging connector female head 140 and the charging connector male head 210 are disconnected, the voltage detection module 130 is configured to detect that a second voltage drop value between the first communication terminal g and the second communication terminal i of the charging connector female head 140 is obtained, and if the second voltage drop value is greater than a preset threshold and a key of a forklift is in an inserted state, the battery management module 120 controls the battery module 110 to discharge and not to charge.
The preset threshold is greater than the preset interval, for example, the preset threshold is 5V, and the preset interval is 1V to 2V.
When the charging connector is disconnected, the voltage detection module 130 can only detect the second voltage drop value between the first communication terminal g and the second communication terminal i of the charging connector female head 140, and at this time, the first communication terminal g and the second communication terminal i are in an open state, so that the second voltage drop value is greater than the first voltage drop value, the voltage detection module 130 determines that the second voltage drop value is greater than the preset threshold value, and sends a second voltage detection signal to the battery management module 120, where the second voltage detection signal is used to indicate that the charging connector is in a disconnected state. When the battery management module 120 receives the forklift key insertion signal and the second voltage detection signal at the same time, the battery management module 120 controls the battery module 110 not to charge and discharge, and the forklift can be started. In one embodiment, the second voltage detection signal is a low level signal.
In one embodiment, to match the output voltage of the low voltage supply terminal z of the battery management module with the voltage requirement of the voltage detection module 130, as shown in fig. 2, the first detection terminal of the voltage detection module 130 is connected to the low voltage supply terminal z of the battery management module through a resistor R1.
In one embodiment, as shown in fig. 2, a first communication terminal of the battery management module 120 is connected to a first communication terminal of the charging connector female 140 through a capacitor C1, and a second communication terminal of the battery management module 120 is connected to a second communication terminal of the charging connector female 140 through a capacitor C2. When the voltage detection module 130 is powered on or the charging connector is turned on or off, that is, when the first detection end and the second detection end of the voltage detection module 130 have voltage changes, the capacitors C1 and C2 can play a role in transient isolation, so that the larger voltage changes are prevented from directly contacting the first communication end and the second communication end of the battery management module 120, and the protocol communication between the battery management module 120 and the forklift charging device 200 cannot be performed.
In one embodiment, the voltage detection module includes an ADC circuit. The ADC circuit converts the detected analog voltage drop value into a digital voltage drop value, so that the accuracy of voltage drop value judgment is realized.
In one embodiment, as shown in fig. 2 and 3, the battery module 110 includes a charge switch 111, a discharge switch 112, and a battery cell 113. The controlled end r of the charging switch 111 is connected to the charging control end q of the battery management module 120, the input end a of the charging switch 111 is connected to the charging terminal b of the charging connector female head 140, and the output end s of the charging switch 111 is connected to the charging end v of the battery unit 113. The controlled end e of the discharge switch 112 is connected with the discharge control end d of the battery management module 120, the input end t of the discharge switch 112 is connected with the discharge end u of the battery unit 113, and the output end c of the discharge switch 112 is connected with the forklift power system 300.
When the charging connector is turned on, the voltage detection module 130 detects a first voltage drop value at two sides of the resistor R0, and determines that the first voltage drop value is within a preset interval, and sends a first voltage detection signal to the battery management module 120. When the battery management module 120 receives the first voltage detection signal, it sends control instructions from the charge control terminal q and the discharge control terminal d, respectively, to control the charge switch 111 to be turned on and the discharge switch 112 to be turned off. The forklift can not be started even if a key is inserted.
When the charging connector is disconnected, the voltage detection module 130 detects a second voltage drop value between the first communication terminal and the second communication terminal of the charging connector female head 140, and sends a second voltage detection signal to the battery management module 120 if the second voltage drop value is determined to be greater than the preset threshold. When the battery management module 120 receives the second voltage detection signal and can receive or detect the forklift key insertion signal, control instructions are respectively sent from the charging control terminal q and the discharging control terminal d to control the charging switch 111 to be turned off and the discharging switch 112 to be turned on. The forklift may be started.
In one embodiment, as shown in fig. 4 and 5, the charging connector is a REMA320 connector. The longest two terminals on both sides of the REMA320 connector female are the positive charging terminal and the negative charging terminal, respectively, and the shortest two terminals in the middle of the REMA320 connector female are the first communication terminal and the second communication terminal, respectively. Further, the first communication terminal and the second communication terminal may be collocated for charging protocol transmission, for example, the first communication terminal transmits high-order information of the protocol, and the second communication terminal transmits low-order information of the protocol.
On the other hand, as shown in fig. 1 to 5, the embodiment of the present invention further provides a forklift charging system, which includes a forklift charging device 200 and the forklift vehicle-mounted power supply device 100, where the forklift charging device 200 is provided with a charging connector male head 210, and a first communication terminal and a second communication terminal of the charging connector male head 210 are connected through a resistor R0.
In one specific embodiment, as shown in fig. 6, the battery management module 120 is a BMS module. Charging control + and charging control-pin of BMS module corresponds charging control + and charging control-of connecting charging switch KA 1. Discharge control + and charge control-pin of BMS module connects discharge control + and discharge control-of charge switch KA 2. The first communication end of the BMS module transmits CAN bus high-order data, and the second communication end of the BMS module transmits CAN bus low-order data.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. A forklift-mounted power supply device, comprising: the battery module, the battery management module, the voltage detection module and the charging connector female head;
The charging end of the battery module is connected with the charging terminal of the charging connector female head, and the discharging controlled end of the battery module is connected with the forklift power system; the discharging control end of the battery management module is connected with the discharging controlled end of the battery module, the first communication end of the battery management module is connected with the first communication terminal of the charging connector female head, and the second communication end of the battery management module is connected with the second communication terminal of the charging connector female head;
The first detection end of the voltage detection module is respectively connected with the first communication terminal of the charging connector female head, the low-voltage power supply end of the battery management module and the first communication end of the battery management module, the second detection end of the voltage detection module is respectively connected with the second communication terminal of the charging connector female head, the second communication end of the battery management module and is grounded, and the detection output end of the voltage detection module is connected with the voltage detection end of the battery management module; the low-voltage power supply end of the battery management module is a pin or a port of the battery management module, which can provide a low-voltage stable voltage source and can provide constant voltage with any value of 3V-12V;
The charging connector female head is correspondingly arranged with a charging connector male head on the forklift charging device, a charging terminal of the charging connector female head is used for being connected with a charging terminal of the charging connector male head, a first communication terminal of the charging connector female head is used for being connected with a first communication terminal of the charging connector male head, a second communication terminal of the charging connector female head is used for being connected with a second communication terminal of the charging connector male head, and the first communication terminal and the second communication terminal of the charging connector male head are connected through a resistor R0;
When the charging connector female head is connected with the charging connector male head, the voltage detection module detects a first voltage drop value of the resistor R0, and if the first voltage drop value is within a preset interval, the battery management module controls the battery module not to discharge.
2. The forklift truck-mounted power supply device according to claim 1, wherein the voltage detection module is configured to detect the first voltage drop value when the charging connector is in the connected state, and send a first voltage detection signal to the battery management module when the first voltage drop value is within the preset interval, the first voltage detection signal being configured to indicate that the charging connector is in the connected state.
3. The forklift on-board power supply device according to claim 2, wherein the charging control end of the battery management module is connected to the charging control end of the battery module, and the voltage detection module is configured to detect a second voltage drop value between the first communication terminal and the second communication terminal of the charging connector female head when the charging connector female head and the charging connector male head are disconnected, and if the second voltage drop value is greater than a preset threshold value and a key of the forklift is in an inserted state, the battery management module controls the battery module to discharge and not charge.
4. A forklift on-board power supply device according to claim 3, wherein the first detection terminal of the voltage detection module is connected to the low voltage supply terminal of the battery management module via a resistor R1.
5. The forklift truck power supply device according to claim 4, wherein a first communication end of said battery management module is connected to a first communication terminal of said charging connector female head via a capacitor C1, and a second communication end of said battery management module is connected to a second communication terminal of said charging connector female head via a capacitor C2.
6. The forklift truck power supply apparatus of claim 5, wherein said voltage detection module comprises an ADC circuit.
7. The forklift on-board power supply device according to claim 6, wherein said battery module comprises a charge switch, a discharge switch and a battery unit,
The controlled end of the charging switch is connected with the charging control end of the battery management module, the input end of the charging switch is connected with the charging terminal of the charging connector female head, and the output end of the charging switch is connected with the charging end of the battery unit;
The controlled end of the discharging switch is connected with the discharging control end of the battery management module, the input end of the discharging switch is connected with the discharging end of the battery unit, and the output end of the discharging switch is connected with the forklift power system.
8. The forklift truck power supply unit of claim 7, wherein said charging connector is a REMA320 connector.
9. A forklift charging system, which is characterized by comprising a forklift charging device and a forklift vehicle-mounted power supply device according to any one of claims 1-8, wherein a charging connector male head is arranged on the forklift charging device, and a first communication terminal and a second communication terminal of the charging connector male head are connected through a resistor R0.
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