CN211308248U - Controller safety pre-charging system - Google Patents
Controller safety pre-charging system Download PDFInfo
- Publication number
- CN211308248U CN211308248U CN201922489386.8U CN201922489386U CN211308248U CN 211308248 U CN211308248 U CN 211308248U CN 201922489386 U CN201922489386 U CN 201922489386U CN 211308248 U CN211308248 U CN 211308248U
- Authority
- CN
- China
- Prior art keywords
- resistor
- charging
- control unit
- vehicle control
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a controller safety preliminary filling system, constitute basic preliminary filling return circuit including preliminary filling resistance, preliminary filling relay, main relay. A pre-charging loop current sensor, pre-charging loop front and back terminal voltage sensors and a pre-charging resistor temperature sensor are added, and the sensors are connected to a vehicle control unit. When the system executes the pre-charging, the vehicle control unit starts timing, collects the front end voltage and the rear end voltage of the pre-charging loop at the same time, collects the temperature difference of the pre-charging resistor in the pre-charging process, collects the current signal, and judges that the pre-charging is successful if the voltage difference value, the current value and the temperature rise value meet the design value of the pre-charging program within the specified time. The utility model discloses realize intelligent control pre-charging process according to return circuit electric current, voltage, pre-charging resistance temperature rise and pre-charging time. And safe pre-charging is realized.
Description
Technical Field
The utility model relates to a new energy automobile technical field especially relates to a controller safety preliminary filling system.
Background
The new energy automobile is powered by a high-voltage battery, and a voltage-stabilizing capacitor is generally designed on the side of a control direct-current bus, and comprises a motor controller, a high-power DCDC (direct current) of a fuel cell, an auxiliary drive DCAC (direct current alternating current) controller and the like. When the controller is connected with a high-voltage power supply, the voltage-stabilizing capacitor needs to be pre-charged, and the control principle of pre-charging basically adopts a pre-charging resistor throttling mode.
Most of the pre-charging systems are simple to control, only the on-off of a main relay is controlled or a pre-charging relay is added, the control logic only judges the voltage difference value before and after pre-charging, and the pre-charging is completed when the value is smaller than a certain threshold value. The rough control is simple, but if the predicted problems of internal short circuit of equipment, reverse connection of positive and negative buses in production and the like occur, the burning of the pre-charging circuit is directly caused, and devices adjacent to the pre-charging circuit are damaged.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough among the above-mentioned prior art, the utility model provides a controller safety preliminary filling system, include: the system comprises a power storage battery, a current sensor, a voltage sensor, a main relay, a pre-charging resistor, a load end and a vehicle control unit;
the positive end of the power storage battery is respectively connected with the first end of the voltage sensor, the first end of the main relay and the first end of the pre-charging relay through the current sensor;
the second end of the pre-charging relay is connected with the first end of the pre-charging resistor, and the second end of the pre-charging resistor and the second end of the main relay are respectively connected with the load end;
a temperature sensor is arranged on the load end;
the whole vehicle controller is respectively connected with the current sensor, the voltage sensor, the main relay, the pre-charging relay and the temperature sensor;
the vehicle control unit acquires current data of a system through a current sensor, acquires voltage data of the system through a voltage sensor, acquires temperature data of the system through a temperature sensor, and judges whether the acquired data exceeds a range; and the main relay and the pre-charging relay are respectively controlled to act.
Further, it should be noted that the method further includes: a timer;
the timer is connected with the vehicle control unit, and the vehicle control unit acquires the timing duration through the timer.
It should be further noted that the timer includes: the LED timing circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a timing chip U1, a light-emitting diode LED and a photoelectric isolator;
a pin of the timing chip U1, a first input end of the photoelectric isolator and a second end of the capacitor C1 are respectively grounded; two pins of the timing chip U1 are grounded through a capacitor C2; the first end of the capacitor C1 is respectively connected with the second end of the resistor R3, the sliding end of the resistor R3, and two pins and six pins of the timing chip U1; the first end of the resistor R3 is respectively connected with the seven pins of the timing chip U1 and the first end of the resistor R2; the second end of the resistor R2 is respectively connected with the first end of the resistor R4, the eight pins of the timing chip U1 and a power supply; the second end of the resistor R4 is respectively connected with the three pins of the timing chip U1 and the first end of the resistor R5 through a light emitting diode LED; the second end of the resistor R5 is connected with the first input end of the photoelectric isolator; the output end of the photoelectric isolator is connected with the whole vehicle controller; the vehicle controller is also connected with the first end of the resistor R1 and four pins of the timing chip U1; the second terminal of the resistor R1 is grounded.
Further, it should be noted that the method further includes: an input/output device;
the input and output device is connected with the vehicle control unit, and the vehicle control unit acquires a control command input by a user through the input and output device and displays the current state information of the system through the input and output device.
It should be further noted that the vehicle control unit acquires temperature data of the system through the temperature sensor, and when the temperature value exceeds 185 ℃, it is determined that the system is in a fault state.
It should be further noted that the vehicle control unit acquires temperature data of the system through the temperature sensor, and determines that the system is in a fault state when a temperature rise value acquired by the temperature sensor exceeds 20 ℃ within a preset time period.
It should be further noted that the vehicle control unit is connected with the current sensor, the voltage sensor, the main relay, the pre-charging relay and the temperature sensor through a CAN communication line;
the load end is provided with a voltage-stabilizing capacitor.
According to the technical scheme, the utility model has the advantages of it is following:
the system provided by the utility model comprises a pre-charging resistor, a pre-charging relay and a main relay which form a basic pre-charging loop. A pre-charging loop current sensor, pre-charging loop front and back terminal voltage sensors and a pre-charging resistor temperature sensor are added, and the sensors are connected to a vehicle control unit. When the system executes the pre-charging, the vehicle control unit starts timing, collects the front end voltage and the rear end voltage of the pre-charging loop at the same time, collects the temperature difference of the pre-charging resistor in the pre-charging process, collects the current signal, and judges that the pre-charging is successful if the voltage difference value, the current value and the temperature rise value meet the design value of the pre-charging program within the specified time. The utility model discloses realize intelligent control pre-charging process according to return circuit electric current, voltage, pre-charging resistance temperature rise and pre-charging time. And safe pre-charging is realized.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a controller safety priming system;
fig. 2 is a circuit diagram of a timer.
Drawings
In the figure: 1. the device comprises a power storage battery, 2, a current sensor, 3, a voltage sensor, 4, a main relay, 5, a pre-charging relay, 6, a pre-charging resistor, 7, a voltage-stabilizing capacitor, 8, a temperature sensor, 9, an acquisition module, 11, a timer, 13 and a photoelectric isolator.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the invention.
The utility model provides a controller safety pre-charging system, as shown in fig. 1 and fig. 2, include: the system comprises a power storage battery 1, a current sensor 2, a voltage sensor 3, a main relay 4, a pre-charging relay 5, a pre-charging resistor 6, a load end 7 and a vehicle control unit 9;
the positive end of the power storage battery 1 is respectively connected with the first end of the voltage sensor 3, the first end of the main relay 4 and the first end of the pre-charging relay 5 through the current sensor 2; the second end of the pre-charging relay 5 is connected with the first end of the pre-charging resistor 6, and the second end of the pre-charging resistor 6 and the second end of the main relay 4 are respectively connected with the load end 7; a temperature sensor 8 is arranged on the load end 7; the vehicle control unit 9 is respectively connected with the current sensor 2, the voltage sensor 3, the main relay 4, the pre-charging relay 5 and the temperature sensor 8; the vehicle control unit 9 acquires current data of the system through the current sensor, acquires voltage data of the system through the voltage sensor, acquires temperature data of the system through the temperature sensor, and judges whether the acquired data exceeds the range; and also controls the main relay 4 and the pre-charging relay 5 to act respectively.
In fig. 1, a load portion is shown in a dotted line, a low-voltage control and signal acquisition portion is shown in a dotted line, and a high-voltage continuous portion is shown in a solid line.
The vehicle control unit 9 is a VCU vehicle control unit. The vehicle control unit 9 is connected with the current sensor 2, the voltage sensor 3, the main relay 4, the pre-charging relay 5 and the temperature sensor 8 through a CAN communication line; the load end 7 is provided with a voltage-stabilizing capacitor.
The utility model discloses still include: an input/output device; the input and output device is connected with the vehicle control unit 9, and the vehicle control unit 9 acquires a control command input by a user through the input and output device and displays the current state information of the system through the input and output device. The input and output device can be arranged in the cab, and a touch screen, a display screen, a control key combination and the like can be adopted.
The utility model discloses in, still include: a timer 11; the timer 11 is connected with the vehicle control unit 9, and the vehicle control unit 9 acquires the timing duration through the timer 11.
The timer 11 includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a timing chip U1, a light-emitting diode LED and a photoelectric isolator 13;
a pin of the timing chip U1, a first input end of the photoelectric isolator 13 and a second end of the capacitor C1 are respectively grounded; two pins of the timing chip U1 are grounded through a capacitor C2; the first end of the capacitor C1 is respectively connected with the second end of the resistor R3, the sliding end of the resistor R3, and two pins and six pins of the timing chip U1; the first end of the resistor R3 is respectively connected with the seven pins of the timing chip U1 and the first end of the resistor R2; the second end of the resistor R2 is respectively connected with the first end of the resistor R4, the eight pins of the timing chip U1 and a power supply; the second end of the resistor R4 is respectively connected with the three pins of the timing chip U1 and the first end of the resistor R5 through a light emitting diode LED; the second end of the resistor R5 is connected with the first input end of the photoelectric isolator 13; the output end of the photoelectric isolator 13 is connected with the whole vehicle controller 9; the vehicle control unit 9 is also connected with the first end of the resistor R1 and four pins of the timing chip U1; the second terminal of the resistor R1 is grounded. The timer chip U1, R2, the resistor R3, and the capacitor C1 constitute an astable multivibrator block of the timer 11, and the oscillation frequency is 1.443/(R2+ resistor R3) and the capacitor C1. The vehicle control unit 9 is connected with four pins of the timing chip U1, and can be used for controlling the on-off of the timing chip U1. The optoelectronic isolator 13 can filter signals and isolate noise waves.
Based on above-mentioned system the utility model discloses still provide concrete implementation, the pre-filling process: when a high-voltage system of a vehicle needs to be powered on, the vehicle control unit 9 detects current data of the current sensor 2, detects voltage data of the voltage sensor 3, and detects data of the temperature sensor 8, the sensor data are within a range specified by the vehicle control unit, the vehicle control unit 9 judges that the pre-charging loop is free of faults, starts to send a relay pull-in instruction to the pre-charging relay 5, and meanwhile, the vehicle control unit 9 starts to time, detects the voltage of the pre-charging loop front end voltage, namely the voltage of the battery 1, measured by the voltage sensor 3 and the voltage of the pre-charging loop rear end voltage, namely the voltage of the voltage stabilizing capacitor 7, detects the current value of the current sensor 2, and detects. During the pre-charging period, the power storage battery 1 charges the voltage stabilizing capacitor 7 through the current sensor 2, the pre-charging relay 5 and the pre-charging resistor 6, the current value measured by the current sensor 2 is a descending RC curve, and the voltage value measured by the voltage sensor 3 is an ascending curve of the voltage stabilizing capacitor 7. When the voltage difference between the front end voltage of the pre-charging circuit, namely the voltage of the battery 1, and the rear end voltage of the pre-charging circuit, namely the voltage-stabilizing capacitor 7, is 10Vdc and the rear end voltage is more than 98% of the front end voltage, the pre-charging is judged to be successful, the vehicle control unit 9 starts to send a relay pull-in instruction to the main relay 4 at the moment, and after 1 second, a relay disconnection instruction is sent to the pre-charging relay 5, so that the pre-charging process is completed.
And (3) a fault process: firstly, when a high-voltage system of a vehicle needs to be powered on, the vehicle control unit 9 detects current data of the current sensor 2, and if a current value exists, the fault state is judged; secondly, detecting the voltage data of the voltage sensor 3, and if the voltage of the power storage battery 1 is 0 or less than a specified value, judging that the power storage battery is in a fault state; thirdly, detecting data of the temperature sensor 8, and if the temperature value exceeds 185 ℃, judging that the temperature sensor is in a fault state; fourthly, after the pre-charging process is started, if the current value measured by the current sensor 2 is a non-descending RC curve and keeps a larger value within a specified time, the fault state is judged; fifthly, after the pre-charging process is started, if the voltage value of the voltage stabilizing capacitor 7 measured by the voltage sensor 3 is a non-rising curve and the voltage value is kept at a lower value within a specified time, the fault state is judged; sixthly, after the priming process is started, if the temperature rise value of the temperature sensor 8 exceeds 20 ℃ within a predetermined time, it is determined as a failure state. Therefore, the technical problem of safety control of the pre-charging loop is solved. When the controller to be precharged is internally short-circuited or the controller is connected with a wire harness, the positive bus and the negative bus are reversely connected, and the like, the problems that the precharging circuit is burnt and the devices adjacent to the precharging circuit are damaged are directly caused.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A controller safety priming system, comprising: the system comprises a power storage battery (1), a current sensor (2), a voltage sensor (3), a main relay (4), a pre-charging relay (5), a pre-charging resistor (6), a load end (7) and a vehicle control unit (9);
the positive end of the power storage battery (1) is respectively connected with the first end of the voltage sensor (3), the first end of the main relay (4) and the first end of the pre-charging relay (5) through the current sensor (2);
the second end of the pre-charging relay (5) is connected with the first end of the pre-charging resistor (6), and the second end of the pre-charging resistor (6) and the second end of the main relay (4) are respectively connected with the load end (7);
a temperature sensor (8) is arranged on the load end (7);
the whole vehicle controller (9) is respectively connected with the current sensor (2), the voltage sensor (3), the main relay (4), the pre-charging relay (5) and the temperature sensor (8);
the vehicle control unit (9) acquires current data of the system through the current sensor, acquires voltage data of the system through the voltage sensor, acquires temperature data of the system through the temperature sensor, and judges whether the acquired data exceeds the range; and the main relay (4) and the pre-charging relay (5) are respectively controlled to act.
2. The controller safety priming system of claim 1,
further comprising: a timer (11);
the timer (11) is connected with the vehicle control unit (9), and the vehicle control unit (9) acquires the timing duration through the timer (11).
3. The controller safety priming system of claim 2,
the timer (11) comprises: the LED timing circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a timing chip U1, a light-emitting diode LED and a photoelectric isolator (13);
a pin of the timing chip U1, a first input end of the photoelectric isolator (13) and a second end of the capacitor C1 are respectively grounded; two pins of the timing chip U1 are grounded through a capacitor C2; the first end of the capacitor C1 is respectively connected with the second end of the resistor R3, the sliding end of the resistor R3, and two pins and six pins of the timing chip U1; the first end of the resistor R3 is respectively connected with the seven pins of the timing chip U1 and the first end of the resistor R2; the second end of the resistor R2 is respectively connected with the first end of the resistor R4, the eight pins of the timing chip U1 and a power supply; the second end of the resistor R4 is respectively connected with the three pins of the timing chip U1 and the first end of the resistor R5 through a light emitting diode LED; the second end of the resistor R5 is connected with the first input end of the photoelectric isolator (13); the output end of the photoelectric isolator (13) is connected with the whole vehicle controller (9); the vehicle control unit (9) is also connected with the first end of the resistor R1 and four pins of the timing chip U1; the second terminal of the resistor R1 is grounded.
4. Controller safety priming system according to claim 1 or 2,
further comprising: an input/output device;
the input and output device is connected with the vehicle control unit (9), and the vehicle control unit (9) acquires a control command input by a user through the input and output device and displays the current state information of the system through the input and output device.
5. Controller safety priming system according to claim 1 or 2,
the vehicle control unit (9) acquires temperature data of the system through the temperature sensor, and when the temperature value exceeds 185 ℃, the system is judged to be in a fault state.
6. Controller safety priming system according to claim 1 or 2,
the vehicle control unit (9) acquires temperature data of the system through the temperature sensor, and when the temperature rise value acquired by the temperature sensor exceeds 20 ℃ within a preset time period, the vehicle control unit judges that the system is in a fault state.
7. Controller safety priming system according to claim 1 or 2,
the vehicle control unit (9) is connected with the current sensor (2), the voltage sensor (3), the main relay (4), the pre-charging relay (5) and the temperature sensor (8) through a CAN communication line;
the load end (7) is provided with a voltage-stabilizing capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922489386.8U CN211308248U (en) | 2019-12-31 | 2019-12-31 | Controller safety pre-charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922489386.8U CN211308248U (en) | 2019-12-31 | 2019-12-31 | Controller safety pre-charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211308248U true CN211308248U (en) | 2020-08-21 |
Family
ID=72064318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922489386.8U Active CN211308248U (en) | 2019-12-31 | 2019-12-31 | Controller safety pre-charging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211308248U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111055687A (en) * | 2019-12-31 | 2020-04-24 | 中国重汽集团济南动力有限公司 | Controller safety pre-charging system and method and new energy automobile |
| CN114683848A (en) * | 2020-12-31 | 2022-07-01 | 宝能汽车集团有限公司 | Vehicle, control method of relay in high-voltage system of vehicle, medium and electronic equipment |
-
2019
- 2019-12-31 CN CN201922489386.8U patent/CN211308248U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111055687A (en) * | 2019-12-31 | 2020-04-24 | 中国重汽集团济南动力有限公司 | Controller safety pre-charging system and method and new energy automobile |
| CN114683848A (en) * | 2020-12-31 | 2022-07-01 | 宝能汽车集团有限公司 | Vehicle, control method of relay in high-voltage system of vehicle, medium and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111055687A (en) | Controller safety pre-charging system and method and new energy automobile | |
| CN106208280B (en) | Charging control method and device for electric automobile and electric automobile | |
| CN211308248U (en) | Controller safety pre-charging system | |
| CN102343877B (en) | Low voltage bus stability | |
| CN102117943B (en) | Intelligent charging method and device for battery management system of electric vehicle | |
| CN205044559U (en) | Electricelectric moves light bus high voltage distributor box | |
| US7595607B2 (en) | Battery charging system and methods | |
| CN112319259B (en) | Control system and control method for alternating-current charging electronic lock of electric automobile | |
| CN106740176B (en) | A kind of charging device of electric automobile and its charge control method | |
| CN112014617B (en) | Method, device and system for testing quiescent current of whole vehicle | |
| CN109094392B (en) | Electric automobile alternating-current charging awakening circuit and method | |
| CN112590616A (en) | High-voltage loop of power battery of electric automobile and control method thereof | |
| CN103069154A (en) | Method and device for operating a starter of a vehicle | |
| CN104986047A (en) | Control method for low-voltage hybrid vehicle battery system | |
| CN105922885A (en) | Automobile electrical system pre-charging circuit and pre-charging method | |
| CN201167242Y (en) | Automobile charger | |
| CN108790924B (en) | Pre-charging circuit of electric vehicle common pre-charging resistor and pre-charging method of master and slave equipment of pre-charging circuit | |
| CN114204163B (en) | Heating method for battery pack of electric automobile and electronic equipment | |
| CN109733245B (en) | Method for continuously charging electric automobile after firmware or software is upgraded | |
| CN211567861U (en) | Automatic power supply device for storage battery of electric vehicle | |
| CN219523726U (en) | Automatic wake-up device of electric automobile | |
| CN202399925U (en) | Intelligent protective device for faults of automobile circuit | |
| CN110654251B (en) | Method for charging a high-voltage battery in a traction power grid and traction power grid | |
| CN219634993U (en) | Charging system of vehicle and electric automobile | |
| CN218054916U (en) | Processing device for preventing low-voltage battery feed of electric logistics vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |