CN113602145B - Power supply management device and management method for supplementing power to storage battery of electric logistics vehicle - Google Patents
Power supply management device and management method for supplementing power to storage battery of electric logistics vehicle Download PDFInfo
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- CN113602145B CN113602145B CN202110943672.6A CN202110943672A CN113602145B CN 113602145 B CN113602145 B CN 113602145B CN 202110943672 A CN202110943672 A CN 202110943672A CN 113602145 B CN113602145 B CN 113602145B
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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
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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
- B60L1/00—Supplying electric power to auxiliary equipment of 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
- 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
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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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- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a power management device for supplementing power to a storage battery of an electric logistics vehicle, which comprises a battery pack, a key switch, a motor controller, a vehicle body controller, an instrument controller, a vehicle wake-up relay, a power supplementing relay, a vehicle controller, a high-voltage to low-voltage controller and a battery management controller, wherein the modules are matched with each other to execute the starting, power supplementing and dormancy work of the electric logistics vehicle; the power management method of the power management device for supplementing power to the storage battery of the electric logistics vehicle is also provided. In the invention, in the Off state of the whole vehicle, the battery pack is monitored at intervals to automatically wake up, so that the feeding condition can be timely detected, in addition, a whole vehicle wake-up relay is additionally arranged between a whole vehicle wake-up line and a controller related to power supply, the power supply function is matched, the power supply operation is completed, the electric quantity loss is reduced, the feeding is avoided, and the vehicle is started without using external equipment.
Description
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to a power management device and a management method for supplementing power to a storage battery of an electric logistics vehicle.
Background
For new energy automobiles, a 12V storage battery is arranged besides a power battery, and the new energy automobile is commonly called a small storage battery. For electric vehicles, a 12V battery is used to power some of the electrical components of the vehicle, and even to provide starting energy for the vehicle during starting. When the pure electric vehicle is used, the phenomenon that the 12V storage battery is fed after being not charged for a period of time or being placed for a long time can be found, the vehicle can not be started after the 12V storage battery is fed, and the vehicle can be started only by means of external equipment, so that great inconvenience is brought to the use of the pure electric vehicle.
Disclosure of Invention
The invention provides a power management device and a management method for supplementing power to a storage battery of an electric logistics vehicle, which are used for solving the problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the power management device comprises a battery pack, a key switch, a motor controller, a vehicle body controller, an instrument controller, a whole vehicle wake-up relay, a power supply relay, a whole vehicle controller, a high-voltage to low-voltage controller and a battery management controller;
one end of the key switch is electrically connected with the battery pack, and the other end of the key switch is provided with an Off end, an On end and a Start end; the On end is electrically connected with the signal input ends of the motor controller, the vehicle body controller, the instrument controller and the whole vehicle awakening relay respectively through first awakening signal lines, the signal output end of the whole vehicle awakening relay is grounded, the strong electric input end of the whole vehicle awakening relay is electrically connected with the battery pack, the strong electric output end of the whole vehicle awakening relay is electrically connected with the input end of the whole vehicle controller, the input end of the high-voltage-to-low-voltage controller and the input end of the battery management controller respectively through second awakening signal lines, the output end of the high-voltage-to-low-voltage controller and the output end of the battery management controller are electrically connected with the strong electric input end of the power supplementing relay, the strong electric output end of the power supplementing relay is electrically connected with the strong electric input end of the whole vehicle awakening relay, the signal input end of the power supplementing relay is electrically connected with the output end of the whole vehicle controller through third awakening signal lines, and the signal output end of the power supplementing relay is grounded; and the Start end is electrically connected with the input end of the whole vehicle controller through a starting signal line.
The invention aims to solve the technical problems, and adopts the following further technical scheme:
further, the whole vehicle wake-up relay and the power-up relay are both provided with pull-up resistors for pulling up the electric level.
Further, the motor controller, the vehicle body controller and the instrument controller are all connected in parallel and electrically connected, and the whole vehicle controller, the high-voltage to low-voltage controller and the battery management controller are all connected in parallel and electrically connected.
Further, a clock self-wake-up module is arranged in the whole vehicle controller and used for monitoring the feeding of the battery pack at intervals of time self-wake-up under the Off state of the whole vehicle.
Further, the battery pack is a direct current 12V storage battery.
The invention also provides a power management method of the power management device for supplementing electricity to the storage battery of the electric logistics vehicle, which comprises the following steps:
s1, when a driver operates a key switch from an Off end to a non-Off end, and a first wake-up signal line is pulled up to a high level, a second wake-up signal line is pulled up to a high level, a third wake-up signal line is pulled up to a high level, a start signal line is pulled up to a high level, and the electric logistics vehicle is in a start running state and enters a power management mode in the start running state;
s2, when a driver operates a key switch from a non-Off end to an Off end, and the first wake-up signal line is pulled down to a low level, the second wake-up signal line is pulled down to a low level, and the third wake-up signal line is pulled down to a low level, the starting signal line is pulled down to a low level, and the electric logistics vehicle is in a dormant state and enters a power management mode under the dormant state;
s3, when the driver operates the key switch state at the Off end and the first wake-up signal line is kept at a low level, the whole vehicle controller is self-awakened at intervals through an internal clock self-awakening module in the Off state, after self-awakening, the third wake-up signal line is pulled to a high level, the whole vehicle controller detects the voltage of the battery pack, the whole vehicle controller sends a signal for requesting power compensation to the battery management controller and the high-voltage-to-low-voltage controller, the battery management controller judges the battery pack state and charges the battery pack through the high-voltage-to-low-voltage controller, and the electric logistics vehicle is in the power compensation state and enters a power management mode in the power compensation state.
Further, in S1, the power management mode in the start-up running state includes the steps of:
s11, switching a key switch from an Off end to a non-Off end, pulling a first wake-up signal line to a high level, and waking up the motor controller, the vehicle body controller and the instrument controller;
s12, the first wake-up signal line pulls up the level of the second wake-up signal line through the whole vehicle wake-up relay, and wakes up the whole vehicle controller, the high-voltage to low-voltage controller and the battery management controller;
s13, the whole vehicle controller judges the state of the starting signal line and executes the starting action of the electric logistics vehicle.
Further, in S3, the power management mode in the power up state includes the following steps:
s31, the key switch state is at an Off end, the first wake-up signal line is pulled to be low level, the motor controller, the vehicle body controller and the instrument controller are not woken up, the whole vehicle controller is self-woken up at intervals through an internal clock self-wake-up module in the Off state, and after self-woken up, the third wake-up signal line is pulled to be high level, so that the whole vehicle controller, the high-voltage to low-voltage controller and the battery management controller are woken up;
s32, the whole vehicle controller detects whether the voltage of the battery pack is smaller than a voltage threshold, and when the voltage of the battery pack is smaller than the voltage threshold, the whole vehicle controller sends a signal for requesting power supply to the battery management controller and the high-voltage-to-low-voltage controller; when the vehicle controller detects that the voltage of the battery pack reaches a normal value, the vehicle controller sends a command for completing power supply to the battery management controller and the high-voltage-to-low-voltage controller, the battery management controller and the high-voltage-to-low-voltage controller stop power supply, and the vehicle controller, the battery management controller and the high-voltage-to-low-voltage controller all enter a dormant state.
Further, the whole vehicle controller is configured to perform interval self-wake-up power supply in an Off state through an internal clock self-wake-up module, and the interval self-wake-up power supply step includes:
s311: in the Off state of the whole vehicle, the clock of the whole vehicle controller starts to count time from the wake-up module, and the count time is recorded as T;
s312: when T is greater than or equal to 1h, the clock self-awakening module clears the processing; otherwise, repeating step S311;
s313: after the clock self-awakening module is cleared, when the voltage of the battery pack is less than or equal to 9.5V, closing the power-supplementing relay, pulling the third awakening signal line to a high level, and awakening the high-voltage to low-voltage controller and the battery management controller; otherwise, repeating the step S311;
s314: after waking up the high-voltage to low-voltage controller and the battery management controller, when the high-voltage to low-voltage controller has no fault, the SOC loss rate is more than or equal to 5% and the battery management controller has no fault, starting to supplement electricity; otherwise, repeating the step S311;
s315: when the voltage of the battery pack is greater than or equal to 13V, the power supply is completed, and the whole vehicle controller initiates a power-down instruction; otherwise, continuing to supplement electricity;
s316: after the power-up is completed, after the whole vehicle controller initiates a power-down instruction, the power-up relay is disconnected, the high-voltage to low-voltage controller and the battery management controller enter a dormant state, the whole vehicle controller enters an Off state, the whole vehicle controller enters the dormant state, the whole vehicle enters the Off dormant state, and step S311 is repeated.
The beneficial effects of the invention are as follows:
the invention sets a clock self-wake-up module in the whole vehicle controller, and in the Off state of the whole vehicle, the whole vehicle controller self-wakes up to monitor whether the battery pack feeds or not, can timely detect the feeding condition,
in addition, a whole-vehicle wake-up relay is added between a whole-vehicle wake-up line (a first wake-up signal line and a second wake-up signal line) and controllers related to power supply (a whole-vehicle controller, a high-voltage to low-voltage controller and a battery management controller), other controllers (a motor controller, a vehicle body controller and an instrument controller) are isolated during power supply, other controllers are prevented from being awakened, the whole-vehicle controller only wakes up the controllers related to power supply (the whole-vehicle controller, the high-voltage to low-voltage controller and the battery management controller) through the power supply relay, the power supply function is completed in a matched mode, the power supply operation is completed, the power consumption is reduced, the power supply is avoided, and the vehicle is started without using external equipment.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the module connection of a power management device of the present invention;
FIG. 2 is a schematic diagram of a power management method of the present invention in Off state with interval self-wakeup power up;
FIG. 3 is a variation of the signal line of the present invention when the driver operates the key switch;
FIG. 4 is a state of the wake-up signal line during the power up process of the present invention;
the parts in the drawings are marked as follows:
the device comprises a battery pack 1, a key switch 2, a motor controller 3, a vehicle body controller 4, an instrument controller 5, a whole vehicle wake-up relay 6, a power-up relay 7, a whole vehicle controller 8, a clock self-wake-up module 81, a high-voltage to low-voltage controller 9, a battery management controller 10, a first wake-up signal line 11, a second wake-up signal line 12, a third wake-up signal line 13, a starting signal line 14 and a pull-up resistor 15.
Detailed Description
The following specific embodiments of the invention are described in order to provide those skilled in the art with an understanding of the present disclosure. The invention may be embodied in other different forms, i.e., modified and changed without departing from the scope of the invention.
Example 1
As shown in fig. 1 and 3, the power management device comprises a battery pack 1, a key switch 2, a motor controller 3, a vehicle body controller 4, an instrument controller 5, a whole vehicle wake-up relay 6, a power compensation relay 7, a whole vehicle controller 8, a high-voltage to low-voltage controller 9 and a battery management controller 10;
one end of the key switch 2 is electrically connected with the battery pack 1, and the other end of the key switch 2 is provided with an Off end, an On end and a Start end; the On end is electrically connected with signal input ends of the motor controller 3, the vehicle body controller 4, the instrument controller 5 and the whole vehicle awakening relay 6 respectively through a first awakening signal line 11, the signal output end of the whole vehicle awakening relay 6 is grounded, the strong electric input end of the whole vehicle awakening relay 6 is electrically connected with the battery pack 1, the strong electric output end of the whole vehicle awakening relay 6 is electrically connected with the input end of the whole vehicle controller 8, the input end of the high-voltage-to-low-voltage controller 9 and the input end of the battery management controller 10 respectively through a second awakening signal line 12, the output end of the high-voltage-to-low-voltage controller 9 and the output end of the battery management controller 10 are electrically connected with the strong electric input end of the power supplementing relay 7, the strong electric output end of the power supplementing relay 7 is electrically connected with the strong electric input end of the whole vehicle awakening relay 6, the signal input end of the power supplementing relay 7 is grounded through a third awakening signal line 13; the Start terminal is electrically connected to the input terminal of the vehicle controller 8 via a Start signal line 14.
The whole vehicle wake-up relay 6 and the power-up relay 7 are respectively provided with a pull-up resistor 15 for pulling up the level.
The motor controller 3, the vehicle body controller 4 and the instrument controller 5 are all connected in parallel and electrically connected, and the whole vehicle controller 8, the high-voltage-to-low-voltage controller 9 and the battery management controller 10 are all connected in parallel and electrically connected.
The vehicle controller 8 is provided with a clock self-wake-up module 81, which is used for monitoring the feeding of the battery pack 1 by self-wake-up at intervals in the Off state of the vehicle.
The battery pack 1 is a direct-current 12V battery.
Example 2
A power management method for a power management device for recharging a storage battery of an electric logistics vehicle, as shown in fig. 2 and 4, comprises the following steps:
the method comprises the following steps:
s1, when a driver operates a key switch from an Off end to a non-Off end, and a first wake-up signal line is pulled up to a high level, a second wake-up signal line is pulled up to a high level, a third wake-up signal line is pulled up to a high level, a start signal line is pulled up to a high level, and the electric logistics vehicle is in a start running state and enters a power management mode in the start running state;
s2, when a driver operates a key switch from a non-Off end to an Off end, and the first wake-up signal line is pulled down to a low level, the second wake-up signal line is pulled down to a low level, and the third wake-up signal line is pulled down to a low level, the starting signal line is pulled down to a low level, and the electric logistics vehicle is in a dormant state and enters a power management mode under the dormant state;
s3, when the driver operates the key switch state at the Off end and the first wake-up signal line is kept at a low level, the whole vehicle controller is self-awakened at intervals through an internal clock self-awakening module in the Off state, after self-awakening, the third wake-up signal line is pulled to a high level, the whole vehicle controller detects the voltage of the battery pack, the whole vehicle controller sends a signal for requesting power compensation to the battery management controller and the high-voltage-to-low-voltage controller, the battery management controller judges the battery pack state and charges the battery pack through the high-voltage-to-low-voltage controller, and the electric logistics vehicle is in the power compensation state and enters a power management mode in the power compensation state.
In S1, the power management mode in the start-up running state includes the steps of:
s11, switching a key switch from an Off end to a non-Off end, pulling a first wake-up signal line to a high level, and waking up the motor controller, the vehicle body controller and the instrument controller;
s12, the first wake-up signal line pulls up the level of the second wake-up signal line through the whole vehicle wake-up relay, and wakes up the whole vehicle controller, the high-voltage to low-voltage controller and the battery management controller;
s13, the whole vehicle controller judges the state of the starting signal line and executes the starting action of the electric logistics vehicle.
In S3, the power management mode in the power up state includes the following steps:
s31, the key switch state is at an Off end, the first wake-up signal line is pulled to be low level, the motor controller, the vehicle body controller and the instrument controller are not woken up, the whole vehicle controller is self-woken up at intervals through an internal clock self-wake-up module in the Off state, and after self-woken up, the third wake-up signal line is pulled to be high level, so that the whole vehicle controller, the high-voltage to low-voltage controller and the battery management controller are woken up;
s32, the whole vehicle controller detects whether the voltage of the battery pack is smaller than a voltage threshold, and when the voltage of the battery pack is smaller than the voltage threshold, the whole vehicle controller sends a signal for requesting power supply to the battery management controller and the high-voltage-to-low-voltage controller; when the vehicle controller detects that the voltage of the battery pack reaches a normal value, the vehicle controller sends a command for completing power supply to the battery management controller and the high-voltage-to-low-voltage controller, the battery management controller and the high-voltage-to-low-voltage controller stop power supply, and the vehicle controller, the battery management controller and the high-voltage-to-low-voltage controller all enter a dormant state.
The whole vehicle controller is self-awakened to supplement electricity at intervals in an Off state through an internal clock self-awakening module, and the steps of the interval self-awakening to supplement electricity comprise the following steps:
s311: in the Off state of the whole vehicle, the clock of the whole vehicle controller starts to count time from the wake-up module, and the count time is recorded as T;
s312: when T is greater than or equal to 1h, the clock self-awakening module clears the processing; otherwise, repeating step S311;
s313: after the clock self-awakening module is cleared, when the voltage of the battery pack is less than or equal to 9.5V, closing the power-supplementing relay, pulling the third awakening signal line to a high level, and awakening the high-voltage to low-voltage controller and the battery management controller; otherwise, repeating the step S311;
s314: after waking up the high-voltage to low-voltage controller and the battery management controller, when the high-voltage to low-voltage controller has no fault, the SOC loss rate is more than or equal to 5% and the battery management controller has no fault, starting to supplement electricity; otherwise, repeating the step S311;
s315: when the voltage of the battery pack is greater than or equal to 13V, the power supply is completed, and the whole vehicle controller initiates a power-down instruction; otherwise, continuing to supplement electricity;
s316: after the power-up is completed, after the whole vehicle controller initiates a power-down instruction, the power-up relay is disconnected, the high-voltage to low-voltage controller and the battery management controller enter a dormant state, the whole vehicle controller enters an Off state, the whole vehicle controller enters the dormant state, the whole vehicle enters the Off dormant state, and step S311 is repeated.
The working process and working principle of the invention are as follows:
according to the functional characteristics of the power management apparatus and the power management method, the functions of the relevant controller for supplementing power to the battery pack 1 are defined as: the whole vehicle controller 8 is responsible for judging the state of the whole vehicle and the voltage of the battery pack 1, the battery management controller 10 is responsible for judging the charging condition of the whole vehicle, and the high-voltage-to-low-voltage controller 9 is responsible for supplying power to the low-voltage accessories;
(1) The power management device and the power management method for meeting the starting running conditions:
when the driver operates the key switch 2 from Off end to non-Off end, the first wake-up signal line 11 is pulled high to wake up the non-fast charge related controllers, such as the motor controller 3, the vehicle body controller 4 and the instrument controller 5, which can work normally, and meanwhile, the first wake-up signal line 11 is pulled high through the whole vehicle wake-up relay 6 to wake up the power-up related controllers, such as the whole vehicle controller 8, the high-voltage to low-voltage controller 9 and the battery management controller 10, all the controllers are woken up at the moment. As shown in fig. 3, the whole vehicle controller 8 completes the start by judging the state of the start signal line 14;
when the driver operates the key switch 2 from the non-Off end to the Off end, the first wake-up signal line 11 is pulled down, and the second wake-up signal line 12 is pulled down through the whole-vehicle wake-up relay 6, and all controllers enter dormancy according to the state of the wake-up signal lines;
(2) The power management device and the power management method meet the function of supplementing power to the battery pack:
as shown in fig. 3, when the power is supplied, the key switch 2 is at Off end, the first wake-up signal line 11 is kept low, the controller associated with non-power supply is not woken up, the vehicle body controller 4 is self-woken up by the internal clock from the wake-up module 81 at intervals of a certain time in the Off state, for example, 1 hour, after self-woken up, the third wake-up signal line 13 is pulled up, and then the power supply related controller and module device are woken up, meanwhile, the whole vehicle controller 8 detects whether the voltage of the battery pack 1 is smaller than a certain value, if so, the whole vehicle controller 8 sends a signal for requesting power supply to the battery management controller 10 and the high-voltage-to-low voltage controller 9, the battery management controller 10 judges the state of the battery pack and then charges the battery pack through the high-voltage-to-low voltage controller 9, when the whole vehicle controller 8 detects that the voltage of the battery pack reaches a normal value, the whole vehicle state is judged, and the battery management controller 10 and the high-voltage-to-low voltage controller 9 sends instructions for completing power supply, and the whole vehicle controller 10 and the high-voltage-to-low voltage controller 9 stop the battery controller 9, and the whole vehicle controller 8 and the high-voltage-to enter the sleep state 2 shown in the specific state.
The foregoing description is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structures made by the description of the invention and the accompanying drawings, or direct or indirect application in other related technical fields, are equally included in the scope of the invention.
Claims (7)
1. A power management device for supplying electricity to a storage battery of an electric logistics vehicle is characterized in that: the power management device comprises a battery pack (1), a key switch (2), a motor controller (3), a vehicle body controller (4), an instrument controller (5), a whole vehicle wake-up relay (6), a power-up relay (7), a whole vehicle controller (8), a high-voltage to low-voltage controller (9) and a battery management controller (10);
one end of the key switch (2) is electrically connected with the battery pack (1), and the other end of the key switch (2) is provided with an Off end, an On end and a Start end; the On terminal is electrically connected with the signal input terminals of the motor controller (3), the vehicle body controller (4), the instrument controller (5) and the whole vehicle awakening relay (6) respectively through a first awakening signal line (11), the signal output terminal of the whole vehicle awakening relay (6) is grounded, the strong electric input terminal of the whole vehicle awakening relay (6) is electrically connected with the battery pack (1), the strong electric output terminal of the whole vehicle awakening relay (6) is electrically connected with the input terminal of the whole vehicle controller (8), the input terminal of the high-voltage to low-voltage controller (9) and the input terminal of the battery management controller (10) respectively through a second awakening signal line (12), the output terminal of the high-voltage to low-voltage controller (9) is electrically connected with the strong electric input terminal of the supplementary electric relay (7) respectively, the strong electric output terminal of the supplementary electric relay (7) is electrically connected with the strong electric output terminal of the supplementary electric relay (7) of the electric signal input terminal (7) of the whole vehicle awakening relay (7) through a third electric output terminal (13); the Start end is electrically connected with the input end of the whole vehicle controller (8) through a starting signal line (14);
the motor controller (3), the vehicle body controller (4) and the instrument controller (5) are all electrically connected in parallel, and the whole vehicle controller (8), the high-voltage-to-low-voltage controller (9) and the battery management controller (10) are all electrically connected in parallel;
the vehicle controller (8) is internally provided with a clock self-wake-up module (81) for monitoring the feeding of the battery pack (1) at intervals of time self-wake-up under the Off state of the vehicle.
2. The power management device for supplementing power to a storage battery of an electric logistics car according to claim 1, wherein: and the whole-vehicle wake-up relay (6) and the power-up relay (7) are respectively provided with a pull-up resistor (15) for pulling up the level.
3. The power management device for supplementing power to a storage battery of an electric logistics car according to claim 1, wherein: the battery pack (1) is a direct-current 12V storage battery.
4. A power management method of a power management device for recharging a storage battery of an electric logistics car as claimed in any one of claims 1 to 3, characterized in that:
the method comprises the following steps:
s1, when a driver operates a key switch from an Off end to a non-Off end, and a first wake-up signal line is pulled up to a high level, a second wake-up signal line is pulled up to a high level, a third wake-up signal line is pulled up to a high level, a start signal line is pulled up to a high level, and the electric logistics vehicle is in a start running state and enters a power management mode in the start running state;
s2, when a driver operates a key switch from a non-Off end to an Off end, and the first wake-up signal line is pulled down to a low level, the second wake-up signal line is pulled down to a low level, and the third wake-up signal line is pulled down to a low level, the starting signal line is pulled down to a low level, and the electric logistics vehicle is in a dormant state and enters a power management mode under the dormant state;
s3, when the driver operates the key switch state at the Off end and the first wake-up signal line is kept at a low level, the whole vehicle controller is self-awakened at intervals through an internal clock self-awakening module in the Off state, after self-awakening, the third wake-up signal line is pulled to a high level, the whole vehicle controller detects the voltage of the battery pack, the whole vehicle controller sends a signal for requesting power compensation to the battery management controller and the high-voltage-to-low-voltage controller, the battery management controller judges the battery pack state and charges the battery pack through the high-voltage-to-low-voltage controller, and the electric logistics vehicle is in the power compensation state and enters a power management mode in the power compensation state.
5. The power management method of the power management device for recharging the storage battery of the electric logistics car according to claim 4, wherein: in S1, the power management mode in the start-up running state includes the steps of:
s11, switching a key switch from an Off end to a non-Off end, pulling a first wake-up signal line to a high level, and waking up the motor controller, the vehicle body controller and the instrument controller;
s12, the first wake-up signal line pulls up the level of the second wake-up signal line through the whole vehicle wake-up relay, and wakes up the whole vehicle controller, the high-voltage to low-voltage controller and the battery management controller;
s13, the whole vehicle controller judges the state of the starting signal line and executes the starting action of the electric logistics vehicle.
6. The power management method of the power management device for recharging the storage battery of the electric logistics car according to claim 4, wherein: in S3, the power management mode in the power up state includes the following steps:
s31, the key switch state is at an Off end, the first wake-up signal line is pulled to be low level, the motor controller, the vehicle body controller and the instrument controller are not woken up, the whole vehicle controller is self-woken up at intervals through an internal clock self-wake-up module in the Off state, and after self-woken up, the third wake-up signal line is pulled to be high level, so that the whole vehicle controller, the high-voltage to low-voltage controller and the battery management controller are woken up;
s32, the whole vehicle controller detects whether the voltage of the battery pack is smaller than a voltage threshold, and when the voltage of the battery pack is smaller than the voltage threshold, the whole vehicle controller sends a signal for requesting power supply to the battery management controller and the high-voltage-to-low-voltage controller; when the vehicle controller detects that the voltage of the battery pack reaches a normal value, the vehicle controller sends a command for completing power supply to the battery management controller and the high-voltage-to-low-voltage controller, the battery management controller and the high-voltage-to-low-voltage controller stop power supply, and the vehicle controller, the battery management controller and the high-voltage-to-low-voltage controller all enter a dormant state.
7. The power management method of a power management device for recharging an electric logistics car battery as claimed in claim 6, wherein: the whole vehicle controller is self-awakened to supplement electricity at intervals in an Off state through an internal clock self-awakening module, and the steps of the interval self-awakening to supplement electricity comprise the following steps:
s311: in the Off state of the whole vehicle, the clock of the whole vehicle controller starts to count time from the wake-up module, and the count time is recorded as T;
s312: when T is greater than or equal to 1h, the clock self-awakening module clears the processing; otherwise, repeating step S311;
s313: after the clock self-awakening module is cleared, when the voltage of the battery pack is less than or equal to 9.5V, closing the power-supplementing relay, pulling the third awakening signal line to a high level, and awakening the high-voltage to low-voltage controller and the battery management controller; otherwise, repeating the step S311;
s314: after waking up the high-voltage to low-voltage controller and the battery management controller, when the high-voltage to low-voltage controller has no fault, the SOC loss rate is more than or equal to 5% and the battery management controller has no fault, starting to supplement electricity; otherwise, repeating the step S311;
s315: when the voltage of the battery pack is greater than or equal to 13V, the power supply is completed, and the whole vehicle controller initiates a power-down instruction; otherwise, continuing to supplement electricity;
s316: after the power-up is completed, after the whole vehicle controller initiates a power-down instruction, the power-up relay is disconnected, the high-voltage to low-voltage controller and the battery management controller enter a dormant state, the whole vehicle controller enters an Off state, the whole vehicle controller enters the dormant state, the whole vehicle enters the Off dormant state, and step S311 is repeated.
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