CN110696584A - HVH driving method of electric vehicle, vehicle-mounted air conditioner controller and vehicle control unit - Google Patents
HVH driving method of electric vehicle, vehicle-mounted air conditioner controller and vehicle control unit Download PDFInfo
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- CN110696584A CN110696584A CN201811642406.4A CN201811642406A CN110696584A CN 110696584 A CN110696584 A CN 110696584A CN 201811642406 A CN201811642406 A CN 201811642406A CN 110696584 A CN110696584 A CN 110696584A
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 132
- 230000004044 response Effects 0.000 claims abstract description 8
- 238000004378 air conditioning Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 10
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- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 4
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- 238000004891 communication Methods 0.000 description 2
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- 238000001514 detection method Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
Abstract
The invention relates to the field of new energy automobile control, and provides an electric automobile HVH driving method, a vehicle-mounted air conditioner controller and a vehicle controller, wherein the electric automobile HVH driving method comprises the following steps: receiving a heating starting instruction, and sending a high-pressure heater starting request to the vehicle control unit based on the heating starting instruction; receiving an enable permission instruction in response to a high-pressure heater turn-on request from the vehicle control unit; triggering to close the high-pressure heater relay based on the enabling permission instruction; and detecting the on-off state of the high-voltage heater relay, and sending the closed state information corresponding to the closed state of the high-voltage heater relay to the vehicle control unit. Therefore, the problem of energy waste caused when the HVH relay does not respond to the enabling allowing signal to be closed is avoided, and the safety performance in the driving process of the high-voltage heater is also improved.
Description
Technical Field
The invention relates to the technical field of new energy automobile control, in particular to an HVH driving method of an electric automobile, a vehicle-mounted air conditioner controller and a vehicle controller.
Background
Unlike an oil-fired vehicle, which can heat the cockpit by using waste heat of an internal combustion engine, a pure electric vehicle generally heats the cockpit by using an HVH (High Voltage Heater).
The control for the HVH at present may generally be controlled by an HVH controller. The HVH controller can monitor the actual work state of the HVH and the actual consumed power of the HVH, and the power usage is carried out when the HVH controller is driven according to the power signal uploaded by the HVH; in addition, some vehicle models are based on no HVH controller to drive HVH, but only controlled by HVH single-gear relay, which can only directly perform corresponding opening and closing operations based on user operation.
The inventor of the present application finds at least the following problems in the related art at present in practicing the present application: on one hand, providing an HVH controller to exclusively manage the high voltage electric heater increases costs and also requires adaptive development of the HVH controller; on the other hand, for the Control method without the HVH controller, when a user triggers an HVH heating button for starting an Air conditioning interface, an AC (Air Conditioner) controller receives a heating start signal from a VCU (Vehicle Control Unit), and then closes an HVH relay based on the start signal in a normal state, and accordingly the VCU distributes power to the HVH relay, but when the HVH relay is failed but not closed, the VCU may continue to distribute heating power to the HVH, which causes power waste and safety problems.
It should be noted that the above description of the related art is only for the purpose of making the public more clearly understand the present invention, and does not represent that the applicant is admitted that the related art is the prior art, and it may also be a technical solution which is not disclosed temporarily in the development stage.
Disclosure of Invention
In view of the above, the present invention is directed to a method for driving a high-voltage heater of an electric vehicle, so as to solve at least the problems of the related art that an HVH controller increases production and development costs, and heating power distribution cannot be well controlled without the HVH controller, which may result in power waste and safety.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a driving method of an electric automobile high-pressure heater is applied to a vehicle-mounted air conditioner controller, and comprises the following steps: receiving a heating starting instruction, and sending a high-voltage heater starting request to a vehicle control unit based on the heating starting instruction; receiving an enable permission instruction from the vehicle control unit in response to the high-pressure heater turn-on request; triggering to close a high-pressure heater relay based on the enabling permission instruction; detecting the on-off state of the high-voltage heater relay, and sending the closed state information corresponding to the closed state of the high-voltage heater relay to the vehicle control unit, so that the vehicle control unit can distribute power to the high-voltage heater based on the closed state information.
Further, after sending the closed state information corresponding to the closed state of the high-voltage heater relay to the vehicle controller, the method for driving the high-voltage heater of the electric vehicle further includes: acquiring a heating stop instruction, and disconnecting the high-voltage heater relay based on the heating stop instruction; sending the heating stop instruction to a vehicle control unit so that the vehicle control unit stops distributing power to the high-pressure heater based on the heating stop instruction.
Further, the heating stop instruction is automatically generated by the high-pressure heater due to over-temperature protection.
Compared with the prior art, the driving method of the high-pressure heater of the electric automobile has the following advantages:
according to the driving method of the high-voltage heater of the electric automobile, after the high-voltage heater relay is operated and closed in response to the enabling permission instruction, the switching state of the high-voltage heater relay is detected, and the closing state information is sent to the vehicle control unit when the high-voltage heater relay is in the closing state, so that the power is distributed when the vehicle control unit determines that the high-voltage heater relay is in the closing state, the problem of energy waste caused when the HVH relay does not respond to the enabling permission signal to be closed is solved, the situation that a line where the high-voltage heater is located is not subjected to power distribution and overhigh voltage under the fault opening state is further guaranteed, and the safety performance in the driving process of the high-voltage heater is improved.
Another object of the present invention is to provide a driving method of a high pressure heater for an electric vehicle, which at least solves the problems of the prior art that an HVH controller increases the production and development costs, and heating power distribution cannot be well controlled without the HVH controller, and power waste and safety may be caused.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a driving method of an electric automobile high-pressure heater is applied to a vehicle control unit, and comprises the following steps: receiving a high pressure heater turn-on request from a vehicle air conditioner controller; judging whether the power condition of the whole vehicle is met or not based on the starting request of the high-pressure heater; when the judgment result indicates that the power condition of the whole vehicle is met, sending an enabling permission instruction to a vehicle-mounted air conditioner controller for triggering to close a high-pressure heater relay; and receiving closing state information for indicating that the high-pressure heater relay is in a closing state from the vehicle-mounted air conditioner controller, and distributing power to the high-pressure heater based on the closing state information.
Further, the high pressure heater turn-on request includes a target heating temperature, wherein the determining whether the vehicle power condition is satisfied includes: analyzing the target heating temperature contained in the high-pressure heater starting request; determining a target required heating power corresponding to the target heating temperature based on a pre-configured rack data table aiming at the high-pressure heater, wherein the target required heating power is the power to be distributed to the high-pressure heater, and the rack data table comprises a plurality of heating temperatures and a plurality of corresponding required heating powers; and judging whether the current finished automobile power condition is met or not according to the current finished automobile power and the target required heating power.
Further, after distributing power to the high-pressure heater based on the switch state information, the electric vehicle high-pressure heater driving method further includes: and receiving a heating stop instruction from the vehicle-mounted air conditioner controller, and stopping distributing power to the high-pressure heater based on the heating stop instruction.
Compared with the prior art, the driving method of the high-pressure heater of the electric automobile has the following advantages:
in the method for driving the high-pressure heater of the electric automobile, after the vehicle controller receives the starting request of the high-pressure heater, whether the power condition of the vehicle is met or not can be judged firstly, and an enabling permission instruction for starting the high-pressure heater is sent only after the power of the vehicle is met, so that the condition that the high-pressure heater of the vehicle is under-voltage after being connected is avoided; and then, power is distributed to the high-pressure heater after the closing state information indicating that the relay of the high-pressure heater is in the closing state is received, so that the effective distribution of the power of the whole vehicle is ensured, and the safety performance of the high-pressure heater in the driving process is also improved.
An object of the present invention is to provide an on-board air conditioning controller, which at least solves the problems of the prior art that the HVH controller increases the production and development costs, and the heating power distribution cannot be controlled well without the HVH controller, which may lead to power waste and safety.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an in-vehicle air conditioning controller, the in-vehicle air conditioning controller comprising: the heating request sending unit is used for receiving a heating starting instruction and sending a high-voltage heater starting request to the whole vehicle controller based on the heating starting instruction; an enable instruction receiving unit for receiving an enable permit instruction in response to the high-pressure heater turn-on request from the vehicle control unit; the relay closing triggering unit is used for triggering and closing the high-pressure heater relay based on the enabling permission instruction; and the closed state sending unit is used for detecting the on-off state of the high-voltage heater relay and sending closed state information corresponding to the closed state of the high-voltage heater relay to the vehicle control unit, so that the vehicle control unit can distribute power to the high-voltage heater based on the closed state information.
Further, the vehicle-mounted air conditioner controller further includes: the heating closing request unit is used for acquiring a heating stopping instruction and disconnecting the high-voltage heater relay based on the heating stopping instruction; and the heat stopping instruction sending unit is used for sending disconnection state information indicating that the high-voltage heater relay is in a disconnection state to the vehicle control unit so that the vehicle control unit stops distributing power to the high-voltage heater based on the disconnection state information.
Another object of the present invention is to provide a vehicle control unit, which at least solves the problems of the prior art that the HVH controller increases the production and development costs, and the heating power distribution cannot be well controlled without the HVH controller, and power waste and safety may be caused.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle control unit, comprising: a heating request receiving unit for receiving a high-pressure heater starting request from a vehicle-mounted air conditioner controller; the condition judgment unit is used for judging whether the power condition of the whole vehicle is met or not based on the starting request of the high-pressure heater; the enabling instruction sending unit is used for sending an enabling allowing instruction to the vehicle-mounted air conditioner controller when the judgment result indicates that the power condition of the whole vehicle is met, so as to trigger the closing of the high-pressure heater relay; and the power distribution unit is used for receiving closing state information used for indicating that the high-pressure heater relay is in a closing state from the vehicle-mounted air conditioner controller and distributing power to the high-pressure heater based on the closing state information.
Further, the vehicle control unit further includes: and the power distribution stopping unit is used for receiving a heating stopping instruction from the vehicle-mounted air conditioner controller and stopping distributing power to the high-pressure heater based on the heating stopping instruction.
Compared with the prior art, the vehicle-mounted air conditioner controller and the vehicle control unit have the same advantages as the driving method of the electric vehicle high-pressure heater, and are not repeated herein.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a driving method of a high-pressure heater of an electric vehicle applied to a vehicle-mounted air conditioner controller according to an embodiment of the invention;
fig. 2 is a flowchart of a driving method of a high-pressure heater of an electric vehicle applied to a vehicle control unit according to another embodiment of the invention;
fig. 3 is a flowchart illustrating an example of the execution of step S22 in the method for driving the high-pressure heater of the electric vehicle of fig. 2;
FIG. 4 is a schematic flow chart illustrating a method for driving a high-pressure heater of an electric vehicle according to an embodiment of the present invention;
FIG. 5 is a timing signal control diagram for driving an opening relay by applying the method for driving a high-voltage heater of an electric vehicle according to the embodiment of the invention;
FIG. 6 is a timing signal control diagram illustrating a method for driving a shut-off relay of an electric vehicle according to an embodiment of the present invention;
fig. 7 is a block diagram of a configuration of an in-vehicle air conditioner controller according to an embodiment of the present invention;
fig. 8 is a block diagram of a vehicle control unit according to an embodiment of the present invention.
Description of reference numerals:
10 vehicle-mounted air conditioner controller 701 heating request sending unit
702 enable instruction receiving unit 703 relay closing trigger unit
704 closed state transmission unit 705 heating shutdown request unit
706 heat-stopping instruction sending unit 20 whole vehicle controller
801 heating request receiving unit 802 condition judging unit
803 enable instruction issue unit 804 power allocation unit
805 power distribution stopping unit
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, a method for driving a high-pressure heater of an electric vehicle applied to a vehicle-mounted air conditioner controller according to an embodiment of the present invention includes:
and S11, receiving a heating starting instruction, and sending a high-pressure heater starting request to the vehicle control unit based on the heating starting instruction of the user.
The execution main body of the method of the embodiment of the invention can be an on-board air conditioner controller, and particularly, the on-board air conditioner controller can realize the control of heating and cooling of a vehicle, for example, the control of a high-pressure heater HVH in an on-board air conditioner is used for realizing a heating function, and the control of a compressor in the on-board air conditioner is used for realizing a cooling function. Accordingly, embodiments of the present invention relate generally to start-stop control of a high pressure heater, and more particularly to optimizing a start-stop control process of a high pressure heater HVH without an HVH controller.
In the embodiment of the invention, the vehicle-mounted air conditioner controller can assist the vehicle-mounted air conditioner controller in managing the on and off of the high-pressure heater through data communication interaction between the vehicle-mounted air conditioner controller and the vehicle controller. Regarding the heating start instruction, it may be triggered by a user touching a heating button on an air-conditioning panel of the vehicle, and after receiving the heating start instruction, the vehicle-mounted air-conditioning controller does not directly close the high-pressure heater relay, but sends a high-pressure heater start request to the vehicle controller, so as to make the vehicle controller prepare for starting the high-pressure heater, for example, calculate a target required heating power to be allocated to the high-pressure heater.
In addition, the heating start instruction may further include a target heating temperature requested by the user, so that the vehicle control unit may determine the heating power corresponding to the target heating temperature.
And S12, receiving an enabling permission instruction responding to the high-pressure heater starting request from the vehicle control unit.
As an example, it may be that the vehicle control unit generates an enable permission command if it determines that the high-pressure heater start condition is permitted, and then sends the enable permission command to the vehicle-mounted air conditioner controller.
And S13, triggering and closing the high-pressure heater relay based on the enabling permission instruction.
Wherein, after the vehicle-mounted air conditioner controller receives the enabling permission instruction, the high-pressure heater relay can be triggered to be closed. However, under some conditions, for example, under a fault condition, the on-board air conditioner controller may not control the high-voltage heater relay to be closed based on the enable permission instruction, and at this time, the vehicle control unit in the related art does not know whether the high-voltage heater relay is closed or not, so that the vehicle control unit continues to distribute power for the HVH; therefore, the situation that the vehicle control unit distributes power for the high-voltage heater due to the fact that the high-voltage heater relay is in the off state exists in the prior art, and power waste and safety problems are caused.
S14, detecting the on-off state of the high-pressure heater relay, and sending the closing state information corresponding to the closing state of the high-pressure heater relay to the vehicle control unit, so that the vehicle control unit can distribute power or target required heating power to the high-pressure heater based on the closing state information.
Regarding the detection of the switching state of the high-voltage heater relay, it may be realized by various means, for example, detection based on a switching state detector, or the like.
In the embodiment of the invention, after the high-voltage heater relay is operated and closed in response to the enabling permission instruction, the switching state of the high-voltage heater relay is detected, and the closing state information is sent to the vehicle control unit when the high-voltage heater relay is in the closing state, so that the power is distributed by the vehicle control unit when the high-voltage heater relay is determined to be in the closing state, the problem of energy waste caused when the HVH relay does not respond to the enabling permission signal for closing is avoided, the phenomenon that the line where the high-voltage heater is located is not subjected to power distribution and is over-high voltage under the fault disconnection state is also ensured, and the safety performance in the driving process of the high-voltage heater is improved.
In some embodiments, after the high pressure heater is activated, the high pressure heater needs to be shut down, which may be recommended to shut down or stop the operation of the high pressure heater in the following manner: firstly, a heating stop instruction is obtained, and a high-voltage heater relay is disconnected based on the heating stop instruction; then, a heating stop command is sent to the vehicle control unit so that the vehicle control unit stops distributing power to the high-pressure heater based on the heating stop command.
It should be noted that the heating stop instruction may be issued by a user interacting with a heating stop control of the vehicle air conditioner panel, and the heating stop instruction may be automatically generated by the high-pressure heater due to over-temperature protection. For example, the high-pressure heater has a PTC (Positive Temperature Coefficient) characteristic, and the heating stop instruction is automatically generated when the Temperature of the high-pressure heater HVH exceeds a thermal protection Temperature threshold.
Correspondingly, in the starting stage of the high-voltage heater, the vehicle control unit is triggered by using the closed state information to distribute power, so that the power is distributed to the high-voltage heater only when the relay is in the closed state, and energy waste and potential safety hazards are avoided; in the shutdown stage of the high-voltage heater, the heating stop instruction is directly used for disconnecting the relay, the state of the relay does not need to be detected and reported to the whole vehicle controller for processing, but the relay of the high-voltage heater is directly disconnected according to the heating stop instruction, so that the high-voltage heater is quickly disconnected, and the high-voltage heater is prevented from being burnt out due to overheating; further, the vehicle-mounted air conditioner controller can also send the heating stop instruction to the vehicle control unit, so that the vehicle control unit can quickly stop distributing power for the high-pressure heater based on the heating stop instruction, and the power consumption of the vehicle can be efficiently saved.
As shown in fig. 2, the method for driving the high-pressure heater of the electric vehicle applied to the vehicle control unit according to the embodiment of the invention includes:
and S21, receiving a high-pressure heater starting request from the vehicle-mounted air conditioner controller.
And S22, judging whether the power condition of the whole vehicle is met or not based on the high-pressure heater opening request.
The determination condition as to whether the power condition of the entire vehicle is satisfied may be whether the entire vehicle is in a high-voltage power-on state, or may be another condition, for example, whether the power of the entire vehicle is sufficient for distributing to a high-voltage heater, or the like.
In some embodiments, the high-pressure heater turn-on request includes a target heating temperature, such as a target heating temperature selected by a user or a target heating temperature determined by adaptation, and the determination process as to whether the vehicle power condition is satisfied may be determined by a process shown in fig. 3: s221, analyzing the target heating temperature contained in the high-pressure heater starting request; s222, determining target required heating power corresponding to target heating temperature based on a pre-configured rack data table aiming at the high-voltage heater, wherein the target required heating power is power to be distributed to the high-voltage heater, and the rack data table comprises a plurality of heating temperatures and a plurality of corresponding required heating powers; s223, judging whether the current finished automobile power condition is met according to the current finished automobile power and the target required heating power; for example, when the vehicle power is greater than the target required heating power, or the allocated target required heating power does not affect the vehicle power to meet the normal operation of other components of the vehicle, the current vehicle power condition of the electric vehicle is determined to be met, and the target required heating power is allowed to be allocated to the high-pressure heater.
It should be noted that, because the heating characteristics of different high-pressure heaters are different, the rack data tables corresponding to different high-pressure heaters may also be different, and the rack data tables may be provided by heater manufacturers or calibrated by the vehicle enterprises, and the required heating powers respectively matched with different heating temperatures can be obtained through the rack data tables. In addition, other data parameters, such as a corresponding voltage parameter, may be added to the gantry data table to facilitate accurate power distribution of the vehicle control unit.
And S23, when the judgment result indicates that the power condition of the whole vehicle is met, sending an enabling permission instruction to the vehicle-mounted air conditioner controller for triggering the closing of the high-pressure heater relay.
In addition, when the judgment result indicates that the power of the whole vehicle is not satisfied, the on-off operation of the high-pressure heater relay can be directly controlled to stop responding.
And S24, receiving closing state information used for indicating that the high-pressure heater relay is in a closing state from the vehicle-mounted air conditioner controller, and distributing power or target required heating power for the high-pressure heater based on the closing state information.
In the embodiment of the invention, after receiving the starting request of the high-pressure heater, the vehicle control unit can firstly judge whether the power condition of the vehicle is met, and sends the enabling permission instruction for starting the high-pressure heater after the power of the vehicle is met, so that the condition of high-pressure and undervoltage of the vehicle caused by the connection of the high-pressure heater is avoided; and then, the target required heating power is distributed to the high-pressure heater after the closing state information indicating that the relay of the high-pressure heater is in the closing state is received, so that the effective distribution of the power of the whole vehicle is ensured, and the safety performance of the high-pressure heater in the driving process is also improved.
Further, during the turn-off of the high-pressure heater, when the vehicle receives a heating stop instruction from the in-vehicle air conditioning controller, the distribution of power to the high-pressure heater or the target required heating power is stopped based on the heating stop instruction. The heating stop instruction can be triggered by user operation or automatically generated by the high-pressure heater due to over-temperature protection, so that the vehicle control unit stops distributing power to the high-pressure heater based on the heating stop instruction, the vehicle control unit quickly stops distributing power to the high-pressure heater based on the heating stop instruction, and the power consumption of the vehicle is efficiently saved.
As shown in fig. 4, the principle flow of the driving method of the high-pressure heater of the electric vehicle according to an embodiment of the present invention includes a data interaction execution process between the vehicle-mounted air conditioner controller 10 and the vehicle control unit 20:
1) the vehicle-mounted air conditioner controller 10 receives a user heating operation, generates an HVH starting request according to the user heating operation, and pre-configures HVH rack data in the vehicle controller 20;
2) the vehicle-mounted air conditioner controller 10 sends an HVH starting request to the vehicle control unit 20;
3) the vehicle controller 20 judges whether the vehicle power condition is met, and sends an enable allowing instruction to the vehicle-mounted air conditioner controller 10 when the vehicle power condition is determined to be met;
4) the vehicle-mounted air conditioner controller 10 controls the HVH relay to be closed based on the permission enable instruction;
5) the vehicle-mounted air conditioner controller 10 detects the on-off state of the high-pressure heater relay, and sends closing state information indicating that the relay is in the closing state to the vehicle control unit 20 when the relay is in the closing state;
6) the vehicle control unit 20 performs distributed power or target required heating power based on the closed state information;
7) when the HVH is self-protected due to over-temperature, the vehicle-mounted air conditioner controller 10 may generate a heating stop instruction, and send the heating stop instruction to the vehicle controller 20;
8) the in-vehicle air conditioning controller 10 triggers the opening of the HVH relay based on the heating stop instruction, and the vehicle control unit 20 stops the distribution of power to the high-pressure heater based on the heating stop instruction.
Aiming at the control mode without an HVH controller, after the HVH is switched on and switched off, if the HVH power is improperly used, the problem of over-discharge of the whole vehicle power or insufficient power utilization during driving can be caused. The embodiment of the invention provides that three HVH enabling signals are combined with HVH actual working state, HVH starting request and VCU permission HVH actual frame data to make a communication control strategy on power use occasion. Wherein, the HVH actual bench data can be provided by HVH manufacturer; (1) the HVH starting request is an HVH starting request signal sent by the AC to the VCU after a driver presses a heating button on an air conditioner panel, and the AC controls the HVH relay to be closed after receiving an enabling allowing instruction sent by the VCU; (2) the VCU allows HVH enabling, namely an enabling allowing instruction sent to the AC on the premise of judging that the condition of the whole vehicle is met after the VCU receives an HVH starting request; (3) the actual work state of the HVH is reported to the VCU by the AC after the HVH relay is closed.
By the technical scheme of the embodiment of the invention, the strategy is established on the power use time for the control mode without the HVH controller, so that the problems of power over-open and insufficient power utilization after the HVH is opened and closed in the traveling due to the fact that the actual power consumption of the HVH cannot be obtained are avoided. Fig. 5 is a timing signal control diagram for driving an opening relay by applying the method for driving a high-voltage heater of an electric vehicle according to the embodiment of the invention; wherein, for the introduction time of HVH actual power, VCU allows HVH enable signal and HVH actual working state signal, the two signals should take the detected signal rising edge as input, the detected rising edge of any signal should take the actual power learned by HVH rack into account for power distribution. Specifically, when a driver presses an HVH heating key on an air conditioner panel, an AC sends an HVH starting request to a VCU at T1, the VCU sends an HVH enabling signal to the AC at T2 after judging that the whole vehicle meets the HVH starting condition, the AC controls an HVH relay to be closed, and sends a relay closing state to the AC after the HVH relay is closed, so that power generated by the HVH needs to be considered at T1.
Accordingly, at the time T3, the HVH stops working due to self-over-temperature protection during working, the HVH relay is opened, the HVH automatically closes the relay after the over-temperature protection is released at the time T4, and the power generated by the HVH also needs to be considered at the time T2.
Fig. 6 is a timing signal control diagram illustrating a timing signal for driving a shut-off relay by applying the electric vehicle high-voltage heater driving method according to the embodiment of the present invention; regarding the introduction timing of the HVH power, an HVH actual working state signal is considered, and the HVH actual consumed power is processed by default at 0kw after the falling edge of the signal is detected. Specifically, a driver presses a key for closing the HVH heating on the air conditioner panel, the AC sends an HVH non-opening request to the VCU at the time of t1 and simultaneously executes the opening action of the HVH relay, the actual work state of the HVH is updated at the time of t2 after the HVH relay is detected to be opened, and the VCU sends an HVH enabling disallowance instruction to the AC at the time of t3, so that the HVH opening and closing state is updated by opening the relay firstly.
Fig. 5-6 above are illustrations of the effects of performing the method of an embodiment of the present invention, and the advancements of embodiments of the present invention will be described in reverse with reference to comparative examples: if the HVH starting request signal is used as the HVH actual consumed power introduction time, the situation that the HVH relay is still powered when the vehicle is not switched off can be caused, the VCU considers that the HVH power is 0, and then the problem of power over-discharge is caused; and if the VCU allows the HVH enable signal to be taken as the timing for introducing the actual HVH consumed power, there is a problem that the actual HVH consumed power has become 0kw, but the VCU still considers that the HVH is consuming power, which in turn leads to insufficient power utilization.
In the process of driving the HVH, the power introduction time after the HVH is turned on and off is controlled, the problems can be overcome, and when the driving is carried out in a control mode without an HVH controller, the strategy formulation can be carried out on the power introduction time, so that the effect equivalent to the control mode with the HVH controller can be achieved, and the research, development and production cost is saved.
As shown in fig. 7, the in-vehicle air conditioning controller 10 according to an embodiment of the present invention includes: the heating request sending unit 701 is used for receiving a heating starting instruction and sending a high-voltage heater starting request to the vehicle control unit based on the heating starting instruction; an enable instruction receiving unit 702 for receiving an enable instruction in response to the high-pressure heater turn-on request from the vehicle control unit; a relay closing triggering unit 703 for triggering to close the high-pressure heater relay based on the enable permission instruction; a closed state sending unit 704, configured to detect a switch state of the high-pressure heater relay, and send closed state information corresponding to that the high-pressure heater relay is in a closed state to a vehicle control unit, so that the vehicle control unit can allocate power to the high-pressure heater based on the closed state information.
In some embodiments, the in-vehicle air conditioning controller 10 further includes: a heating shutdown request unit 705 configured to obtain a heating stop instruction and disconnect the high-voltage heater relay based on the heating stop instruction; a heat-cut instruction sending unit 706, configured to send disconnection state information indicating that the high-voltage heater relay is in a disconnection state to the vehicle control unit, so that the vehicle control unit stops allocating power to the high-voltage heater based on the disconnection state information.
As shown in fig. 8, a vehicle control unit 20 according to an embodiment of the present invention includes: a heating request receiving unit 801 configured to receive a high-pressure heater activation request from an in-vehicle air conditioning controller; a condition determining unit 802, configured to determine whether a power condition of the entire vehicle is satisfied based on the high-pressure heater turn-on request; an enable instruction sending unit 803, configured to send an enable instruction to the vehicle-mounted air conditioner controller to trigger closing of the high-pressure heater relay when the determination result indicates that the power condition of the entire vehicle is satisfied; and the power distribution unit 804 is used for receiving closing state information used for indicating that the high-pressure heater relay is in a closing state from the vehicle-mounted air conditioner controller, and distributing power to the high-pressure heater based on the closing state information.
In some embodiments, the vehicle control unit 20 further includes: a power distribution stopping unit 805 configured to receive a heating stop instruction from the in-vehicle air conditioning controller, and stop distributing power to the high-pressure heater based on the heating stop instruction.
For more specific details of the vehicle-mounted air conditioner controller and the vehicle control unit according to the embodiment of the present invention, reference may be made to the above description on the driving method of the electric vehicle high-pressure heater, and the same or corresponding technical effects as those of the driving method of the electric vehicle high-pressure heater may be obtained, so that no further description is provided herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A driving method of a high-pressure heater of an electric automobile is characterized by being applied to a vehicle-mounted air conditioner controller, and comprises the following steps:
receiving a heating starting instruction, and sending a high-voltage heater starting request to a vehicle control unit based on the heating starting instruction;
receiving an enable permission instruction from the vehicle control unit in response to the high-pressure heater turn-on request;
triggering to close a high-pressure heater relay based on the enabling permission instruction;
detecting the on-off state of the high-voltage heater relay, and sending the closed state information corresponding to the closed state of the high-voltage heater relay to the vehicle control unit, so that the vehicle control unit can distribute power to the high-voltage heater based on the closed state information.
2. The electric vehicle high-pressure heater driving method according to claim 1, wherein after transmitting closing state information corresponding to a closing state of the high-pressure heater relay to a vehicle control unit, the electric vehicle high-pressure heater driving method further comprises:
acquiring a heating stop instruction, and disconnecting the high-voltage heater relay based on the heating stop instruction;
sending the heating stop instruction to a vehicle control unit so that the vehicle control unit stops distributing power to the high-pressure heater based on the heating stop instruction.
3. The method according to claim 1, wherein the heating stop command is automatically generated by the high-pressure heater due to over-temperature protection.
4. The driving method of the high-voltage heater of the electric automobile is applied to a vehicle control unit, and comprises the following steps:
receiving a high pressure heater turn-on request from a vehicle air conditioner controller;
judging whether the power condition of the whole vehicle is met or not based on the starting request of the high-pressure heater;
when the judgment result indicates that the power condition of the whole vehicle is met, sending an enabling permission instruction to a vehicle-mounted air conditioner controller for triggering to close a high-pressure heater relay;
and receiving closing state information for indicating that the high-pressure heater relay is in a closing state from the vehicle-mounted air conditioner controller, and distributing power to the high-pressure heater based on the closing state information.
5. The electric vehicle high-pressure heater driving method according to claim 4, wherein the high-pressure heater turn-on request includes a target heating temperature, and wherein the determining whether the vehicle power condition is satisfied includes:
analyzing the target heating temperature contained in the high-pressure heater starting request;
determining a target required heating power corresponding to the target heating temperature based on a pre-configured rack data table aiming at the high-pressure heater, wherein the target required heating power is the power to be distributed to the high-pressure heater, and the rack data table comprises a plurality of heating temperatures and a plurality of corresponding required heating powers;
and judging whether the current finished automobile power condition is met or not according to the current finished automobile power and the target required heating power.
6. The electric vehicle high pressure heater driving method according to claim 4, further comprising, after distributing power to the high pressure heater based on the switch state information:
and receiving a heating stop instruction from the vehicle-mounted air conditioner controller, and stopping distributing power to the high-pressure heater based on the heating stop instruction.
7. An on-vehicle air conditioner controller, characterized in that, on-vehicle air conditioner controller includes:
the heating request sending unit is used for receiving a heating starting instruction and sending a high-voltage heater starting request to the whole vehicle controller based on the heating starting instruction;
an enable instruction receiving unit for receiving an enable permit instruction in response to the high-pressure heater turn-on request from the vehicle control unit;
the relay closing triggering unit is used for triggering and closing the high-pressure heater relay based on the enabling permission instruction;
and the closed state sending unit is used for detecting the on-off state of the high-voltage heater relay and sending closed state information corresponding to the closed state of the high-voltage heater relay to the vehicle control unit, so that the vehicle control unit can distribute power to the high-voltage heater based on the closed state information.
8. The on-vehicle air conditioning controller according to claim 7, characterized by further comprising:
the heating closing request unit is used for acquiring a heating stopping instruction and disconnecting the high-voltage heater relay based on the heating stopping instruction;
and the heat stopping instruction sending unit is used for sending disconnection state information indicating that the high-voltage heater relay is in a disconnection state to the vehicle control unit so that the vehicle control unit stops distributing power to the high-voltage heater based on the disconnection state information.
9. A vehicle control unit, characterized in that, vehicle control unit includes:
a heating request receiving unit for receiving a high-pressure heater starting request from a vehicle-mounted air conditioner controller;
the condition judgment unit is used for judging whether the power condition of the whole vehicle is met or not based on the starting request of the high-pressure heater;
the enabling instruction sending unit is used for sending an enabling allowing instruction to the vehicle-mounted air conditioner controller when the judgment result indicates that the power condition of the whole vehicle is met, so as to trigger the closing of the high-pressure heater relay;
and the power distribution unit is used for receiving closing state information used for indicating that the high-pressure heater relay is in a closing state from the vehicle-mounted air conditioner controller and distributing power to the high-pressure heater based on the closing state information.
10. The vehicle control unit of claim 9, further comprising:
and the power distribution stopping unit is used for receiving a heating stopping instruction from the vehicle-mounted air conditioner controller and stopping distributing power to the high-pressure heater based on the heating stopping instruction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811642406.4A CN110696584A (en) | 2018-12-29 | 2018-12-29 | HVH driving method of electric vehicle, vehicle-mounted air conditioner controller and vehicle control unit |
| PCT/CN2019/128365 WO2020135521A1 (en) | 2018-12-29 | 2019-12-25 | Hvh drive method for electric vehicle, vehicle-mounted air conditioner controller, and whole vehicle controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811642406.4A CN110696584A (en) | 2018-12-29 | 2018-12-29 | HVH driving method of electric vehicle, vehicle-mounted air conditioner controller and vehicle control unit |
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| CN110696584A true CN110696584A (en) | 2020-01-17 |
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| CN201811642406.4A Pending CN110696584A (en) | 2018-12-29 | 2018-12-29 | HVH driving method of electric vehicle, vehicle-mounted air conditioner controller and vehicle control unit |
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| CN (1) | CN110696584A (en) |
| WO (1) | WO2020135521A1 (en) |
Cited By (1)
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| CN111845702A (en) * | 2020-08-10 | 2020-10-30 | 北京理工大学 | Energy management method for plug-in hybrid electric vehicle |
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| WO2020135521A1 (en) | 2020-07-02 |
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