CN113978251A - Power protection system and method for doubly limiting overall action of forklift - Google Patents
Power protection system and method for doubly limiting overall action of forklift Download PDFInfo
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- CN113978251A CN113978251A CN202110877232.5A CN202110877232A CN113978251A CN 113978251 A CN113978251 A CN 113978251A CN 202110877232 A CN202110877232 A CN 202110877232A CN 113978251 A CN113978251 A CN 113978251A
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- lithium battery
- charging
- relay
- limiting
- fault
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- 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
- B60L2200/42—Fork lift trucks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (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 belongs to a power supply protection system and a power supply protection method for doubly limiting the whole forklift movement, and the power supply protection system and the method are characterized by comprising a lithium battery pack, a lithium battery thermal management module, a lithium battery external output control module, a lithium battery charging and control module, a lithium battery power supply management module and a lithium battery fault limiting module. The two fault reminding modes of message reminding and hardware reminding are set, the motor controller is doubly reminded of acting, and the stability, diversity and guarantee of fault processing are improved. And a relay power-off recovery diode is added, the service life of the DCDC is prolonged, and frequent maintenance is avoided.
Description
Technical Field
The invention belongs to the technical field of forklift battery protection, and particularly relates to a power supply protection system and a power supply protection method for doubly limiting the whole forklift action.
Background
A large number of non-urban road vehicles, particularly lithium battery vehicles, exist in the current market, and the lithium battery vehicles refer to electric vehicles carrying lithium ion batteries. In recent years, environmental problems and shortage of petroleum resources caused by traditional internal combustion engine automobiles have led people to focus on new energy automobiles. The pure electric automobile becomes an important development direction of the electric automobile by really realizing zero emission. The lithium ion battery becomes an ideal power source of a new generation of electric automobiles by virtue of excellent performance.
Because the lithium battery vehicle has the performances of no overcharge, over-discharge, over-temperature, over-current and the like, if faults of overcharge, over-discharge, over-temperature, over-current and the like occur in the driving process, the driving speed of the whole vehicle needs to be reduced, even the vehicle stops and the like, the lithium battery can be damaged, and the personal safety of a driver and passengers can be seriously influenced by sudden deceleration or stopping when the vehicle runs on a road.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a power protection system and a power protection method for doubly limiting the whole action of a forklift.
The power protection system is characterized by comprising a lithium battery pack, a lithium battery thermal management module, a lithium battery external output control module, a lithium battery charging and control module, a lithium battery power management module and a lithium battery fault limiting module, wherein the lithium battery pack is respectively electrically connected with the lithium battery thermal management module, the lithium battery external output control module and the lithium battery power management module, and the lithium battery power management module is respectively electrically connected with the lithium battery external output control module, the lithium battery charging and control module and the lithium battery fault limiting module.
The power protection system for the double-limitation forklift whole vehicle action is characterized in that the lithium battery pack comprises lithium iron phosphate batteries B1 and B2, and the lithium battery power management module comprises an all-in-one machine BMS.
The power protection system for double limitation of the whole forklift truck action is characterized in that the lithium battery thermal management module comprises heating films H1 and H2, a heating negative relay K2 and a heating positive relay K3.
The power protection system for dual limitation of the whole forklift actions is characterized in that the lithium battery external output control module comprises a pre-charging circuit, a discharging relay K4, a discharging port and a discharging communication port.
The power protection system for dual limitation of the whole forklift movement is characterized in that the pre-charging circuit comprises a pre-charging R1 and a pre-charging relay K5, and the discharging communication port is a key switch K6.
The power protection system for dual limitation of the whole forklift actions is characterized in that the lithium battery charging and control module comprises a charging relay K1 and a charging port, and the charging port comprises an A + port, an A-port and a charging CAN.
The power protection system for double limitation of the whole forklift truck action is characterized in that the lithium battery fault limitation module comprises a conversion power supply DCDC1, a diode D1, a limitation action relay K10 and a whole forklift truck CAN.
The power protection system for the action of the double-limitation forklift truck is characterized by further comprising a motor controller, one end of the CAN of the whole truck is connected to the lithium battery power management module, and the other end of the CAN of the whole truck is connected to the motor controller, and is controlled by the limitation action relay K10.
A method for doubly limiting the whole action of a forklift is characterized by comprising the following steps: when the lithium battery pack is in a normal discharging process, the key switch K6 is in a closed state, the pre-charging relay K5 is closed, the K4 discharging relay is closed after 500ms, and the pre-charging relay is opened after 1s to complete electrification;
if the discharge heating temperature is in the range of-10 to 5 ℃, the heating negative relay K2 and the heating positive relay K3 are closed to heat;
if the key is turned off, the integrated BMS enters a dormant state and all outputs are turned off;
when the lithium battery pack is in a normal gun inserting charging process, A + and A-in the charging port activate the integrated BMS, a charging message is simultaneously sent, the charging mode is judged, the charging relay K1 is closed, the charger outputs current according to the current requested by the message after detecting the voltage of the charging port, if the charging port is full or not wanted to be charged in the middle, the A + and the charging CAN signal are disconnected, and the charging is closed;
the whole vehicle CAN has a message for reporting faults, which comprises the judgment and reporting of two fault methods, namely a slight fault method and a serious fault method.
The method for doubly limiting the whole forklift actions is characterized in that when a slight fault occurs, only a fault message is reported, and a motor controller does not process temporarily;
if a serious fault occurs, reporting a serious fault message in the message, lightening a BMS control pin at the same time, activating DCDC1, enabling an output end to be electrified, driving a limiting action relay K10, closing a switch of a vehicle controller, detecting the switching value, realizing the conversion from an active signal to a passive signal, and enabling a motor controller to do actions of limiting lifting and walking according to two prompts in the switching value action and the vehicle message so as to relieve the fault;
after the fault disappears, the reported message and BMS control output are both closed, the battery fault disappears is proved, and the whole vehicle is allowed to act again;
after the driving voltage disappears, the coil of the action limiting relay K10 loses power, and K10 is turned on again;
the diode D1 is used to prevent the impact of the reverse voltage on the DC output port that occurs when the K10 is turned back on.
Compared with the prior art, the invention has the following advantages:
the two fault reminding modes of message reminding and hardware reminding are set, the motor controller is doubly reminded of acting, and the stability, diversity and guarantee of fault processing are improved. And a relay power-off recovery diode is added, the service life of the DCDC is prolonged, and frequent maintenance is avoided.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
The invention will be further explained with reference to the drawings.
As shown in fig. 1-2, a power protection system for doubly limiting the overall actions of a forklift includes a lithium battery pack 1, a lithium battery thermal management module 2, a lithium battery external output control module 3, a lithium battery charging and control module 4, a lithium battery power management module 5 and a lithium battery fault limiting module 6, and is characterized in that the lithium battery pack 1 is respectively electrically connected with the lithium battery thermal management module 2, the lithium battery external output control module 3 and the lithium battery power management module 5, and the lithium battery power management module 5 is respectively electrically connected with the lithium battery external output control module 3, the lithium battery charging and control module 4 and the lithium battery fault limiting module 6.
The lithium battery pack 1 comprises lithium iron phosphate batteries B1 and B2, and the lithium battery power supply management module 5 comprises an all-in-one machine BMS, current dividers FQ1 and FQ 2. The lithium battery thermal management module 2 comprises heating films H1 and H2, a heating negative relay K2 and a heating positive relay K3. The lithium battery external output control module 3 comprises a pre-charging circuit, a discharging relay K4, a discharging port and a discharging communication port. The pre-charging circuit comprises a pre-charging R1 and a pre-charging relay K5, and the discharging communication port is a key switch K6. The lithium battery charging and control module 4 comprises a charging relay K1 and a charging port, wherein the charging port comprises an A + port, an A-port and a charging CAN.
Lithium battery fault restriction module 6 includes switching power supply DCDC1, diode D1, restriction action relay K10, whole car CAN, including motor controller, whole car CAN one end is connected to lithium battery power management module 5, and the other end is connected to motor controller, controls through restriction action relay K10.
Specifically, b1.b2 is a battery, and we take a module composed of 2 parallel-8 strings of lithium iron phosphate as an example, and the number and capacity can be increased or decreased, h1.h2 is a heating film which is a resistive load and can generate heat by using the principle that the resistance of a special material can generate heat to heat the module, so that the project can be applied to a wider temperature range, K2.K3 is a heating positive and heating negative relay for controlling the on and off of the heating film load, while K4 is a discharging relay for controlling the on and off of the external output of the battery, K1 is a charging relay for controlling the start and off of charging, K5 and R1 form a pre-charging branch for correspondingly protecting the main relay, K6 is a key switch for activating the BMS, and a self-locking switch for controlling the activation and sleep of the BMS, K10 is a limiting action relay for DCDC1 to be a 24V to 12V dc voltage conversion module, for converting a 24V supply to 12V to match the coil voltage of K10, and D1 is a diode to limit the rebound voltage when the coil is turned off. The CAN of the whole vehicle is connected with the motor controller and is used for realizing the communication between the BMS and the motor controller, and R2 and R3 are 120 ohm terminal resistors respectively and are used for maintaining the stability of the communication.
A method for doubly limiting the whole action of a forklift is characterized by comprising the following steps: when the lithium battery pack is in a normal discharging process, the key switch K6 is in a closed state, the pre-charging relay K5 is closed, the K4 discharging relay is closed after 500ms, and the pre-charging relay is opened after 1s to complete electrification;
if the discharge heating temperature is in the range of-10 to 5 ℃, the heating negative relay K2 and the heating positive relay K3 are closed to heat;
if the key is turned off, the integrated BMS enters a dormant state and all outputs are turned off;
when the lithium battery pack is in a normal gun inserting charging process, A + and A-in the charging port activate the integrated BMS, a charging message is simultaneously sent, the charging mode is judged, the charging relay K1 is closed, the charger outputs current according to the current requested by the message after detecting the voltage of the charging port, if the charging port is full or not wanted to be charged in the middle, the A + and the charging CAN signal are disconnected, and the charging is closed;
the whole vehicle CAN has a message for reporting faults, which comprises the judgment and reporting of two fault methods, namely a slight fault method and a serious fault method.
When slight fault occurs, only reporting a fault message, and temporarily not processing by the motor controller; if a serious fault occurs, reporting a serious fault message in the message, lightening a BMS control pin at the same time, activating DCDC1, enabling an output end to be electrified, driving a limiting action relay K10, closing a switch of a vehicle controller, detecting the switching value, realizing the conversion from an active signal to a passive signal, and enabling a motor controller to do actions of limiting lifting and walking according to two prompts in the switching value action and the vehicle message so as to relieve the fault;
after the fault disappears, the reported message and BMS control output are both closed, the battery fault disappears is proved, and the whole vehicle is allowed to act again;
after the driving voltage disappears, the coil of the action limiting relay K10 loses power, and K10 is turned on again;
the diode D1 is used to prevent the impact of the reverse voltage on the DC output port that occurs when the K10 is turned back on.
When the circuit is used, the two branches are respectively provided with a shunt, the current state of each branch can be displayed, the hardware state of each branch can be detected, and the error detection capability of the system is improved. And a pre-charging branch is added to protect a main circuit relay.
The two fault reminding modes of message reminding and hardware reminding are set, the motor controller is doubly reminded of acting, and the stability, diversity and guarantee of fault processing are improved. And a relay power-off recovery diode is added, the service life of the DCDC is prolonged, and frequent maintenance is avoided. And a debugging interface is added, and the system maintainability is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a power protection system of double restriction fork truck whole car action, its characterized in that includes lithium cell group (1), lithium battery thermal management module (2), lithium cell to outer output control module (3), lithium battery charge and control module (4), lithium battery power management module (5) and lithium battery fault restriction module (6), its characterized in that lithium cell group (1) respectively with lithium battery thermal management module (2), lithium cell are to outer output control module (3) and lithium battery power management module (5) electricity are connected, lithium battery power management module (5) respectively with the lithium cell is to outer output control module (3), lithium battery charge and control module (4) and lithium battery fault restriction module (6) electricity are connected.
2. The power protection system for doubly limiting the overall action of the forklift as claimed in claim 1, wherein the lithium battery pack (1) comprises lithium iron phosphate batteries B1 and B2, and the lithium battery power management module (5) comprises an all-in-one BMS.
3. The power protection system for doubly limiting the overall action of the forklift as claimed in claim 1, wherein the lithium battery thermal management module (2) comprises heating films H1 and H2, a heating negative relay K2 and a heating positive relay K3.
4. The power protection system for doubly limiting the overall action of the forklift as claimed in claim 1, wherein the lithium battery external output control module (3) comprises a pre-charging circuit, a discharging relay K4, a discharging port and a discharging communication port.
5. The power protection system for doubly limiting the overall actions of the forklift as claimed in claim 4, wherein the pre-charging circuit comprises a pre-charging R1 and a pre-charging relay K5, and the discharging communication port is a key switch K6.
6. The power protection system for doubly limiting the overall action of the forklift as claimed in claim 1, wherein the lithium battery charging and controlling module (4) comprises a charging relay K1 and a charging port, and the charging port comprises an A + port, an A-port and a charging CAN.
7. The power protection system for doubly limiting the whole vehicle action of the forklift as claimed in claim 1, wherein the lithium battery fault limiting module (6) comprises a conversion power source DCDC1, a diode D1, an action limiting relay K10 and a whole vehicle CAN.
8. The power protection system for doubly limiting the whole vehicle action of the forklift as claimed in claim 7, further comprising a motor controller, wherein one end of the whole vehicle CAN is connected to the lithium battery power management module (5), and the other end of the whole vehicle CAN is connected to the motor controller and is controlled by the action limiting relay K10.
9. A method for doubly limiting the overall behavior of a forklift as claimed in any one of claims 1 to 8, characterized in that it comprises the following steps: when the lithium battery pack is in a normal discharging process, the key switch K6 is in a closed state, the pre-charging relay K5 is closed, the K4 discharging relay is closed after 500ms, and the pre-charging relay is opened after 1s to complete electrification;
if the discharge heating temperature is in the range of-10 to 5 ℃, the heating negative relay K2 and the heating positive relay K3 are closed to heat;
if the key is turned off, the integrated BMS enters a dormant state and all outputs are turned off;
when the lithium battery pack is in a normal gun inserting charging process, A + and A-in the charging port activate the integrated BMS, a charging message is simultaneously sent, the charging mode is judged, the charging relay K1 is closed, the charger outputs current according to the current requested by the message after detecting the voltage of the charging port, if the charging port is full or not wanted to be charged in the middle, the A + and the charging CAN signal are disconnected, and the charging is closed;
the whole vehicle CAN has a message for reporting faults, which comprises the judgment and reporting of two fault methods, namely a slight fault method and a serious fault method.
10. The method for doubly limiting the overall actions of the forklift according to claim 9, wherein when a slight fault occurs, only a fault message is reported, and a motor controller does not process the fault message temporarily;
if a serious fault occurs, reporting a serious fault message in the message, lightening a BMS control pin at the same time, activating DCDC1, enabling an output end to be electrified, driving a limiting action relay K10, closing a switch of a vehicle controller, detecting the switching value, realizing the conversion from an active signal to a passive signal, and enabling a motor controller to do actions of limiting lifting and walking according to two prompts in the switching value action and the vehicle message so as to relieve the fault;
after the fault disappears, the reported message and BMS control output are both closed, the battery fault disappears is proved, and the whole vehicle is allowed to act again;
after the driving voltage disappears, the coil of the action limiting relay K10 loses power, and K10 is turned on again;
the diode D1 is used to prevent the impact of the reverse voltage on the DC output port that occurs when the K10 is turned back on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110877232.5A CN113978251A (en) | 2021-07-31 | 2021-07-31 | Power protection system and method for doubly limiting overall action of forklift |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110877232.5A CN113978251A (en) | 2021-07-31 | 2021-07-31 | Power protection system and method for doubly limiting overall action of forklift |
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| CN113978251A true CN113978251A (en) | 2022-01-28 |
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| CN202110877232.5A Pending CN113978251A (en) | 2021-07-31 | 2021-07-31 | Power protection system and method for doubly limiting overall action of forklift |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115071429A (en) * | 2022-08-23 | 2022-09-20 | 江苏智能无人装备产业创新中心有限公司 | Anti-adhesion control method, device and medium for main and positive relays of electric vehicle |
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2021
- 2021-07-31 CN CN202110877232.5A patent/CN113978251A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115071429A (en) * | 2022-08-23 | 2022-09-20 | 江苏智能无人装备产业创新中心有限公司 | Anti-adhesion control method, device and medium for main and positive relays of electric vehicle |
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