WO2014008741A1

WO2014008741A1 - Electric vehicle and power supply management device thereof

Info

Publication number: WO2014008741A1
Application number: PCT/CN2012/086014
Authority: WO
Inventors: 王野; 张春淮; 王可峰; 杜晓佳; 闫永亮; 谢迪
Original assignee: 北汽福田汽车股份有限公司; 北京智科投资管理有限公司
Priority date: 2012-07-12
Filing date: 2012-12-06
Publication date: 2014-01-16
Also published as: CN103538486A; DE112012006695T5; CN103538486B; DE112012006695B4

Abstract

A power supply management device for electric vehicle and an electric vehicle with the power supply management device. The power supply management device comprises a first management module (101), a second management module (102) and a battery module (103), wherein, the first management module (101) is connected with the second management module (102) for controlling the delay power-on of the second management module (102) when the vehicle key is turned on, to implement the power-on self-test for the vehicle controller of the electric vehicle, and controlling the delay power-off of the second management module (102) when the vehicle key is turned off, to save the vehicle data information when the electric vehicle is power-off. The battery module (103) is connected with the first management module (101) and the second management module (102) respectively for supplying power to the first management module (101) and the second management module (102). The power supply management device improves the reliability and safety of the vehicle controller.

Description

Power Management Device for Electric Vehicles and Electric Vehicles This application claims priority to Chinese Patent Application No. 201210241823.4, entitled "Power Management Device for Electric Vehicles and Electric Vehicles", submitted to the China Patent Office on July 12, 2012. The entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of electric vehicle technology, and in particular to a power management device for an electric vehicle and an electric vehicle having the power management device.

Background technique

The non-polluting advantages of electric vehicles make them the main direction of current automobile development, so it is very important to develop and research key technologies of electric vehicles. As one of the core components in the electric control system of electric vehicles, the vehicle controller has become an important research part of electric vehicle technology. The vehicle controller of the electric vehicle bears the comprehensive control of the entire electric vehicle, and its reliability directly affects the reliability of the electric vehicle and relates to the safety performance of the electric vehicle. Among them, the power supply of the vehicle controller has a great influence on the performance of the vehicle controller. A reliable power-on and power-off power supply can ensure that the vehicle controller works stably throughout the working cycle.

Under normal circumstances, when the electric car is powered on, the whole vehicle key is hit to the ON position, the relay that supplies the whole vehicle controller is pulled in, the whole vehicle controller is powered on, and the starting preparation is ready. When the power is off, the vehicle key is turned to the OFF position, the relay is disconnected, and the vehicle controller is powered off. The power-on and power-off of the above methods are controlled by the key through the switch of the single tube, but in many cases, the main control chip of the vehicle controller needs a certain time to check and save during power-on and power-off. The current data state, that is, requires a certain amount of preparation time at power-on, and requires a certain delay time when power is off. However, the above methods cannot meet the requirements of power-on preparation and power-off delay, and the current functional safety level requirements. For higher and higher electric vehicles, safety requirements cannot be met.

The disadvantage of the prior art is that the power supply of many vehicle controllers is controlled by the switch of the key, and the self-test cannot be performed before the main control chip is powered on, which increases the operation in the presence of a fault. risk. At the same time, it is not possible to reliably store some critical data and fault information in a timely manner during a power outage.

Summary of the invention

The object of the present invention is to at least solve one of the above technical drawbacks.

To this end, a first object of the present invention is to provide a power management device for an electric vehicle to improve the reliability and safety of the vehicle controller.

A second object of the present invention is to provide an electric vehicle.

In order to achieve the above object, a first aspect of the present invention provides a power management apparatus for an electric vehicle, including: a first management module and a second management module, wherein the first management module and the electric vehicle are respectively The vehicle controller and the second management module are electrically connected, and are configured to control the second management module to delay power-on when the vehicle key of the electric vehicle is turned on, thereby implementing complete vehicle control of the electric vehicle Performing a power-on self-test, and controlling the second management module to delay power-off when the vehicle key of the electric vehicle is turned off, saving the vehicle data information of the electric vehicle when the power is off; and the battery module The battery module is connected to the first management module and the second management module, respectively, for supplying power to the first management module and the second management module.

According to the power management device of the electric vehicle according to the embodiment of the invention, the function of performing the power-on self-test of the vehicle controller is realized, and the risk that the second management module is still working in the case of the fault of the vehicle controller is avoided, and the risk is improved. Reliability and safety of the vehicle controller. In addition, the power-off delay operation of the second management module prevents the loss of the vehicle data information at the moment of power failure, thereby improving the safety of the vehicle. Further, in an embodiment of the present invention, the first management module includes: a first power control unit and a first control unit, wherein the first power control unit is used in the whole of the electric vehicle Controlling the first control unit to power up when the car key is turned on, and receiving a hold signal output by the first control unit; the first control unit includes a first output end and a second output end, The first control unit outputs the hold signal to the first power control unit through the first output after powering up, and passes the second output to the second management after delaying a first preset time The module outputs a start signal to control the second management module to start.

Preferably, the first power control unit includes a holding end for receiving a hold signal output by the first control unit.

Meanwhile, in an embodiment of the present invention, the first control unit is further configured to detect the electric vehicle, and output a shutdown signal through the second output to control when the electric vehicle is abnormal The second management module is closed.

Moreover, the first control unit is further configured to output fault information when the electric vehicle is abnormal, and perform fault determination according to the fault information.

In an embodiment of the present invention, the first control unit is further configured to save current vehicle data information when detecting that the vehicle key is closed, and pass the first after delaying a second preset time An output releases the hold signal and controls the first control unit and the second management module to be turned off.

Further, in an embodiment of the present invention, the second management module includes: a second power control unit and a second control unit, wherein the second power control unit and the first control unit and the The second control unit is connected, and the second power control unit controls the second control unit to be turned on and off according to an output of the second output end of the first control unit. In an embodiment of the invention, the power management device of the electric vehicle further includes an ignition switch for generating an ignition signal under the control of the entire vehicle key of the electric vehicle.

In an embodiment of the present invention, the power management apparatus of the electric vehicle further includes a signal processing module, wherein the signal processing module is respectively associated with the first management module, the second management module, and the ignition The switch is connected to perform a power-on or power-off operation on the first management module and the second management module according to the ignition signal voltage.

In order to achieve the above object, a second aspect of the present invention provides an electric vehicle including the power management apparatus of the electric vehicle according to the first aspect of the present invention.

The electric vehicle of the embodiment of the invention realizes the function of power-on self-test and power-off delay of the whole vehicle controller, ensures the safety and reliability of the whole vehicle controller in operation, and satisfies the stability of the vehicle controller to the power supply. And the need for reliability. At the same time adopting double

The CPU architecture achieves redundancy in hardware and better meets the current need for functional safety requirements for electric vehicles.

The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic structural view of a power management device for an electric vehicle according to an embodiment of the present invention;

2 is a schematic diagram of a power management device for an electric vehicle according to an embodiment of the present invention. detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in different examples. This repetition is for the purpose of clarity and clarity and does not in itself indicate the relationship between the various embodiments and/or arrangements discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials. Additionally, the structure of the first feature described below "on" the second feature may include embodiments in which the first and second features are formed in direct contact, and may include additional features formed between the first and second features. The embodiment, such that the first and second features may not be in direct contact.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" should be understood broadly, and may be mechanical or electrical, or two, unless otherwise specified and defined. The internal communication of the components may be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms may be understood according to specific situations.

These and other aspects of the embodiments of the present invention will be apparent from the description and appended claims. In the description and drawings, specific embodiments of the embodiments of the invention are disclosed This limit. in contrast, All changes, modifications, and equivalents are intended to be included within the scope of the appended claims.

A power management apparatus for an electric vehicle according to an embodiment of the first aspect of the present invention will be described below with reference to Figs. 1 and 2.

As shown in FIG. 1, a power management apparatus for an electric vehicle according to an embodiment of the present invention includes a first management module 101, a second management module 102, and a battery module 103.

The first management module 101 and the second management module 101 are used to control the entire vehicle operation of the electric vehicle. The first management module 101 is electrically connected to the vehicle controller and the second management module 102 of the electric vehicle, respectively, and is configured to control the second management module 102 to delay power-on when the vehicle key of the electric vehicle is turned on, thereby implementing electric power The vehicle controller of the automobile performs a power-on self-test, which avoids the risk that the second management module 102 still works in the case of a fault of the vehicle controller, and controls the second management module 102 when the vehicle key of the electric vehicle is turned off. When the power is turned off, the vehicle data information of the electric vehicle at the time of power failure is saved. The battery module 103 is connected to the first management module 101 and the second management module 102, respectively, for powering the first management module 101 and the second management module 102.

It should be noted that, in an actual application, the first management module 101 may be integrated into the vehicle controller as a part of the vehicle controller, or may be an independent module, which is not limited in this embodiment of the present invention.

Further, in a specific embodiment of the present invention, as shown in FIG. 2, the first management module 101 includes a first power control unit 201 and a first control unit 202.

The first power control unit 201 is configured to control the first control unit 202 to be powered on when the vehicle key of the electric vehicle is turned on, and the first power control unit 201 includes a holding end HOLD pin, and the holding end HOLD pin receives the first The hold signal output by the control unit 202. The first control unit 202 includes a first output 101 and a second The output end 102 is configured to output a hold signal to the hold end HOLD pin of the first power control unit 201 through the first output terminal 101 after the first control unit 201 is powered on, and pass the second after delaying the first preset time. The output terminal 102 outputs a start signal to the second management module 102 to control the second management module 102 to start.

In an embodiment of the present invention, the first control unit 202 is further configured to detect the electric vehicle, and output a shutdown signal through the second output terminal 102 when the electric vehicle abnormality is detected to control the second management module 102 to be powered off. .

Moreover, the first control unit 202 is further configured to output fault information when the electric vehicle is abnormal, and perform fault determination according to the fault information, and then the vehicle controller performs processing according to the fault determination result in time.

In addition, the first control unit 202 is further configured to save the current vehicle data information when detecting that the vehicle key is closed, and release the hold signal through the first output terminal 101 and control the first control after delaying the second preset time. Unit 202 and second management module 102 are closed.

In one embodiment of the present invention, as shown in FIG. 2, the second management module 102 includes a second power control unit 203 and a second control unit 204. The second power control unit 203 is connected to the first control unit 202 and the second control unit 204, respectively, and the second power control unit 203 controls the second control unit 204 to be activated according to the output of the second output terminal 102 of the first control unit 202. And off.

In an embodiment of the present invention, as shown in FIG. 2, the power management device of the electric vehicle further includes an ignition switch 205 corresponding to the vehicle key of the electric vehicle and generated under the control of the entire vehicle key of the electric vehicle. The ignition signal is used to turn on the circuit.

Further, in an embodiment of the present invention, as shown in FIG. 2, the power management device of the electric vehicle further includes a signal processing module 206. The signal processing module 206 is connected to the first management module 101, the second management module 102, and the ignition switch 205, respectively. The first management module 101 and the second management module 102 are powered on or off according to the ignition signal voltage.

Specifically, as shown in FIG. 2, the power management device of the electric vehicle according to an example of the present invention adopts a dual CPU (Central Processing Unit) architecture, wherein the MCU (Master Control Unit) is the main The chip is the second control unit 204, the SCU (Slave Control Unit) is the slave chip, that is, the first control unit 202, and the SCU is powered by the POWER IC1 (the first power chip), that is, the first power control unit 201. The MCU is powered by the POWER IC2 (second power supply chip), that is, the second power supply control unit 203. In addition, the power module 103 is connected to the input pins IN of the POWER IC1 and the POWER IC2 to supply power to the POWER IC 1 and the POWER IC 2, respectively.

That is to say, when the vehicle key hits the ON position, the ignition switch 205 is closed, and the first power chip POWER IC1 outputs the first power chip POWER IC1 from the output terminal OUT1 when the enable terminal ENABLE detects that the voltage reaches a certain limit. The SCU needs the power supply voltage to the VCC1 end of the SCU, and the SCU starts to work, and outputs a low level through the first output terminal 101 to the holding terminal HOLD pin of the POWER IC1. At the same time, the SCU reads the vehicle state information. If the vehicle state information is normal, the second output terminal 102 outputs a high level enable signal to the WAKE pin of the second power chip POWER IC2; if the vehicle state information is abnormal, The SCU outputs the fault information and performs a corresponding fault determination according to the fault level. At this time, the second output terminal 102 outputs a low level enable signal to the WAKE pin of the second power chip POWER IC2.

When the vehicle status information is normal, the wake-up pin WAKE of POWER IC2 receives the high-level enable signal from the SCU, and the second power chip POWER IC2 outputs the power supply voltage required by the MCU from the output terminal OUT2 to the VCC2 of the MCU, so that the MCU Start working, and the power-on delay of the MCU is determined by the SCU through the software settings. Now it has the function of self-checking the whole vehicle controller to avoid the risk that the MCU still works in the case of faulty vehicle controller, which improves the reliability and safety of the vehicle controller.

When the vehicle key hits the OFF position, the ignition switch 205 is turned off, and the voltage of the ENEND pin of the first power chip POWER IC1 is reduced to 0V, but since the first power chip POWER IC1 has the hold end HOLD pin , keep the HOLD pin low. When the HOLD pin is low, the OUT1 of POWER IC1 can maintain a normal voltage output even when the ENABLE pin voltage drops to 0V. In addition, the ignition signal voltage is processed by the signal processing module 206 and sent to the AD (Analog-Digital) channels of the MCU and the SCU respectively. Since the MCU and the SCU monitor the ignition signal voltage in real time through the respective AD converters, When the vehicle key is turned to the OFF position, when the detected voltage is low to a certain threshold voltage, the MCU and the SCU determine that the entire vehicle is performing the power-off operation, and the MCU and the SCU respectively perform the action of saving the current data information, if At this time, there is a system failure and is saved together with the fault information. After the data information is saved, the SCU outputs the HOLD pin level command for turning off the POWER IC2 and releasing the POWER IC1 through the second output terminal 102, so that the MCU and the SCU are stopped, and The power-off delay of the MCU and the SCU can be determined by the SCU through software settings. At this point, the power-off delay of the vehicle controller is completed, preventing the loss of the main data information of the MCU and the SCU at the moment of power-off, and improving the vehicle. safety.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes or technical variations made by the description of the present invention and the drawings may be directly or indirectly applied to other related technical fields. The same is included in the scope of the present invention.

A power management device for an electric vehicle according to an embodiment of the present invention adopts a double The CPU architecture implements partial redundancy on the hardware and improves the reliability of the vehicle controller. In addition, the master-slave chip MCU and SCU use their own independent power supply chip POWER IC1 and POWER IC2, while the master-slave chip MCU and SCU have strict logic determination on power-on and power-off, which realizes power-on self-test and power-off. The function of time-delay delay avoids the risk of data loss during operation and power failure during power-on, and improves the safety of the vehicle controller.

In order to achieve the object, an embodiment of the second aspect of the present invention provides an electric vehicle including the power management device for the electric vehicle proposed in the first aspect of the present invention.

According to the electric vehicle of the embodiment of the invention, the function of the power-on self-test and the power-off delay of the vehicle controller is ensured that the vehicle controller is safe and reliable in operation, and satisfies the stability of the vehicle controller. And the need for reliability. At the same time, it adopts a dual CPU architecture, which realizes redundancy in hardware and can better meet the needs of the current high safety requirements for electric vehicles.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented with any one or combination of the following techniques well known in the art: having logic gates for implementing logic functions on data signals Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

One of ordinary skill in the art can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, one or a combination of the steps of the method embodiments is included. In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.

The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like. In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means specific features described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.

Claims

Rights request

1. A power management device for an electric vehicle, characterized in that it includes: a first management module and a second management module, wherein the first management module is connected to the vehicle controller of the electric vehicle and the third management module respectively. The two management modules are electrically connected, and are used to control the delayed power-on of the second management module when the vehicle key of the electric vehicle is turned on, to implement power-on self-test of the vehicle controller of the electric vehicle, and to When the vehicle key of the electric vehicle is turned off, control the second management module to delay power off and save the vehicle data information of the electric vehicle when the power is off; and

A battery module, the battery module is connected to the first management module and the second management module respectively, and is used to supply power to the first management module and the second management module.

2. The power management device of an electric vehicle according to claim 1, wherein the first management module includes: a first power control unit and a first control unit, wherein,

The first power control unit is used to control the power on of the first control unit when the vehicle key of the electric vehicle is turned on, and receive the hold signal output by the first control unit;

The first control unit includes a first output terminal and a second output terminal, and is configured to output the hold signal to the first power control unit through the first output terminal after the first control unit is powered on. , and after delaying the first preset time, outputting a start signal to the second management module through the second output terminal to control the start of the second management module.

3. The power management device of an electric vehicle according to claim 2, wherein the first power control unit includes a holding terminal for receiving the holding signal output by the first control unit.

4. The power management device of an electric vehicle according to claim 2, wherein the first control unit is also used to detect the electric vehicle, and when an abnormality of the electric vehicle is detected, the first control unit The second output terminal outputs a shutdown signal to control the second management module to shut down.

5. The power management device of an electric vehicle as claimed in claim 4, characterized in that the fault is determined based on the fault information.

6. The power management device for an electric vehicle according to claim 2, wherein the first control unit is further configured to save the current vehicle data information when it is detected that the vehicle key is turned off, and when the vehicle key is turned off, After a second preset time delay, the hold signal is released through the first output terminal and the first control unit and the second management module are controlled to close.

7. The power management device of an electric vehicle according to claim 2, wherein the second management module includes: a second power control unit and a second control unit, wherein,

The second power control unit is connected to the first control unit and the second control unit respectively, and the second power control unit controls the third power supply according to the output of the second output terminal of the first control unit. Two control units start and shut down.

8. The power management device for an electric vehicle according to any one of claims 1 to 7, further comprising:

An ignition switch is used to generate an ignition signal under the control of the vehicle key of the electric vehicle.

9. The power management device for an electric vehicle as claimed in claim 8, further comprising:

The signal processing module is respectively connected with the first management module and the second management module. The block is connected to the ignition switch and is used to power on or off the first management module and the second management module according to the ignition signal voltage.

10. An electric vehicle, characterized by comprising the power management device of the electric vehicle according to any one of claims 1-9.