Power battery charging method of extended-range fire fighting truck and extended-range fire fighting truck

Abstract

The invention discloses a power battery charging method of an extended-range fire fighting truck and the extended-range fire fighting truck in the technical field of special vehicles, and the charging method comprises the following steps: in response to completion of insertion of the extended-range fire fighting truck and a charging gun of a charging pile, the charging pile wakes up a power battery controller, and the power battery controller wakes up a vehicle control unit and enters a standby state; in response to a quick charging instruction sent by the vehicle-mounted large screen and a charging request instruction sent by the power battery controller received by the vehicle control unit, the vehicle control unit sends a charging permission instruction to the power battery controller and the range extender controller; in response to a charging parameter instruction and a charging pile performance parameter which are sent by a power battery controller and received by a vehicle control unit, the vehicle control unit calculates the output power of a range extender, generates a range extender control instruction and sends the range extender control instruction to a range extender controller, and the range-extended fire fighting truck enters a quick charging state; the charging pile and the range extender can be charged at the same time, the charging time is shortened, and the airport use requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of special vehicles, and in particular to a power battery charging method for an extended-range fire truck and the extended-range fire truck. Background Art

[0002] Airport fire trucks are important equipment for airport fire rescue. When a fire occurs, they play an important role in controlling the fire and reducing accident losses. Therefore, airport fire trucks are required to have the characteristics of high speed and rapid response. In recent years, with the rise of the new energy industry, more and more new energy airport fire trucks equipped with power batteries have been used.

[0003] There are three types of charging methods in the existing technology. The first is slow charging using an AC gun. The 220V AC power in the national power grid is converted into high-voltage DC power through the OBC to charge the battery. The second is fast charging using a DC charging gun. This method converts the DC power in the charging pile into DC power in the power battery. The third method is to use a range extender to charge the power battery. Since the existing technical solution can only use a single method to charge the vehicle, the charging efficiency is low, the speed is slow, and the charging time is long, which is difficult to meet the use of new energy airport fire trucks. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a method for charging a power battery of an extended-range fire truck and an extended-range fire truck, to solve the technical problem that the existing new energy airport fire trucks use a single charging method, have low charging efficiency, and are difficult to meet the needs of airport use.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a method for charging a power battery of an extended-range fire truck, wherein the extended-range fire truck includes a vehicle controller VCU and a power battery controller BMS, a vehicle-mounted large screen IHU, and a range extender controller RCU, which are respectively connected to the vehicle controller VCU for communication; the charging method includes: In response to the completion of the plugging of the charging gun of the extended-range fire truck and the charging pile, the charging pile wakes up the power battery controller BMS, and the power battery controller BMS wakes up the vehicle controller VCU and enters a standby state; In response to the vehicle controller VCU receiving the fast charging instruction sent by the vehicle large screen IHU and the request charging instruction sent by the power battery controller BMS, the vehicle controller VCU sends a charging permission instruction to the power battery controller BMS and the range extender controller RCU; In response to the vehicle controller VCU receiving the charging parameter instruction and the charging pile performance parameter sent by the power battery controller BMS, the vehicle controller VCU calculates the range extender output power, and generates a range extender control instruction and sends it to the range extender controller RCU, and the extended-range fire truck enters a fast charging state; In response to the vehicle controller VCU receiving the charging end instruction sent by the on-board large screen IHU or the charging completion instruction sent by the power battery controller BMS, the vehicle controller VCU sends a charging stop instruction to the power battery controller BMS and the range extender controller RCU, and the power battery controller BMS sends the acquired charging stop instruction to the charging pile.

[0006] Optionally, the charging pile waking up the power battery controller BMS includes: A CC1 signal and an A+ signal are sent to the power battery controller BMS, wherein the CC1 signal is used to confirm the connection status between the charging pile and the extended-range fire truck, and the A+ signal is used to wake up the power battery controller BMS.

[0007] Optionally, the power battery controller BMS waking up the vehicle controller VCU and entering a standby state includes: A high level signal and a standby state signal are sent to the vehicle controller VCU, wherein the high level signal is used to wake up the vehicle controller VCU, and the standby state signal is used to indicate entering a standby state.

[0008] Optionally, in response to the power battery controller BMS receiving the upper high voltage instruction sent by the vehicle controller VCU, the power battery controller BMS pre-charges the power battery through the pre-charging circuit, and after the pre-charging is completed, sends a pre-charging completion instruction and a charging request instruction to the vehicle controller VCU.

[0009] Optionally, in response to the vehicle controller VCU receiving a charging parameter instruction sent by the power battery controller BMS, the vehicle controller VCU sends the acquired charging parameter instruction to the range extender controller RCU.

[0010] Optionally, the power battery controller BMS obtains charging pile performance parameters from the charging pile, and the charging pile performance parameters include: maximum output voltage, maximum output current, minimum output voltage and minimum output current of the charging pile; The charging parameter instruction includes: the maximum allowable charging voltage, the maximum allowable charging current, the current voltage and the current current of the power battery.

[0011] Optionally, the output power of the range extender = the maximum charging power of the power battery - the maximum output power of the charging pile; The maximum charging power of the power battery = the maximum allowable charging voltage of the power battery × the maximum allowable charging current of the power battery; The maximum output power of the charging pile=the maximum output voltage of the charging pile×the maximum output current of the charging pile.

[0012] Optionally, in response to the extended-range fire truck entering a fast charging state, the power battery controller BMS sends a charging state parameter to the charging pile and the vehicle controller VCU, and the vehicle controller VCU sends the acquired charging state parameter to the range extender controller RCU; The charging pile sends the charging pile status parameters to the power battery controller BMS, the range extender controller RCU sends the range extender status parameters to the vehicle controller VCU, and the vehicle controller VCU sends the acquired range extender status parameters to the power battery controller BMS.

[0013] Optionally, the charging state parameters include a required voltage, a required current, a charging voltage measurement value, a charging current measurement value, and an SOC value of the power battery; The charging pile state parameters include the current output voltage and current output current of the charging pile; The range extender state parameters include the current output voltage and the current output current of the range extender.

[0014] In a second aspect, the present invention provides an extended-range fire truck that uses the steps of the above method to achieve rapid charging.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a power battery charging method for an extended-range fire truck and an extended-range fire truck, which communicate and control through a vehicle controller VCU, a power battery controller BMS, an on-board large screen IHU and a range extender controller RCU, so that the charging pile and the range extender can charge the power battery at the same time, greatly shortening the charging time and solving the technical problems of slow DC charging time and only single charging mode, thereby meeting the needs of airport use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a timing diagram of a method for charging a power battery of an extended-range fire truck provided by an embodiment of the present invention; Figure 2 Schematic diagram of a control system of an extended-range fire truck provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of a voltage system of an extended-range fire truck provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] Embodiment 1:

[0019] An embodiment of the present invention provides a method for charging a power battery of an extended-range fire truck. The extended-range fire truck includes a vehicle controller VCU and a power battery controller BMS, an on-board large screen IHU, and a range extender controller RCU, which are respectively communicatively connected to the vehicle controller VCU.

[0020] like Figure 1 As shown, the charging method includes: (1) In response to the completion of the connection between the charging gun of the extended-range fire truck and the charging pile, the charging pile wakes up the power battery controller BMS, and the power battery controller BMS wakes up the vehicle controller VCU and enters the standby state.

[0021] The charging pile wakes up the power battery controller BMS including: The CC1 signal and A+ signal are sent to the power battery controller BMS. The CC1 signal is used to confirm the connection status between the charging pile and the extended-range fire truck. The A+ signal is used to wake up the power battery controller BMS. The A+ signal and the A- signal together constitute a low-voltage auxiliary power supply, which is powered by the charging pile.

[0022] The power battery controller BMS wakes up the vehicle controller VCU and enters the standby state including: Send a high-level signal and a standby status signal to the vehicle controller VCU. The high-level signal is used to wake up the vehicle controller VCU, and the standby status signal is used to indicate entering the standby state.

[0023] (2) In response to the power battery controller BMS receiving the high voltage command sent by the vehicle controller VCU, the power battery controller BMS pre-charges the power battery through the pre-charging circuit, and after the pre-charging is completed, sends a pre-charging completion command and a charging request command to the vehicle controller VCU.

[0024] Precharging the power battery through the precharging circuit means charging the power battery to a certain extent before connecting it to the charging pile to balance the battery voltage and protect the power battery and the charging pile from high current shock. This function is usually implemented by the power battery controller BMS, which protects the power battery by controlling the connection and disconnection of the precharging circuit and the size of the precharging current.

[0025] (3) In response to the vehicle controller VCU receiving the fast charging instruction sent by the on-board large screen IHU and the request charging instruction sent by the power battery controller BMS, the vehicle controller VCU sends a charging permission instruction to the power battery controller BMS and the range extender controller RCU.

[0026] (4) In response to the vehicle controller VCU receiving the charging parameter instructions and charging pile performance parameters sent by the power battery controller BMS, the vehicle controller VCU calculates the output power of the range extender and generates a range extender control instruction and sends it to the range extender controller RCU, and the extended-range fire truck enters the fast charging state.

[0027] After receiving the charging parameter instruction sent by the power battery controller BMS, the vehicle controller VCU synchronously sends it to the range extender controller RCU. Specifically in this embodiment, the charging parameter instruction includes: the maximum allowable charging voltage, maximum allowable charging current, current voltage and current current of the power battery.

[0028] The power battery controller BMS obtains charging pile performance parameters from the charging pile. Specifically in this embodiment, the charging pile performance parameters include: the maximum output voltage, maximum output current, minimum output voltage and minimum output current of the charging pile.

[0029] The output power of the range extender = the maximum charging power of the power battery - the maximum output power of the charging pile, which ensures that the power battery is always charged at its maximum allowed power and ensures charging efficiency. The maximum charging power of the power battery = the maximum allowable charging voltage of the power battery × the maximum allowable charging current of the power battery; The maximum output power of the charging pile = the maximum output voltage of the charging pile × the maximum output current of the charging pile.

[0030] (6) In response to the extended-range fire truck entering the fast charging state, the power battery controller BMS sends the charging state parameters to the charging pile and the vehicle controller VCU, and the vehicle controller VCU sends the acquired charging state parameters to the range extender controller RCU.

[0031] The charging pile sends the charging pile status parameters to the power battery controller BMS, the range extender controller RCU sends the range extender status parameters to the vehicle controller VCU, and the vehicle controller VCU sends the acquired range extender status parameters to the power battery controller BMS.

[0032] Specifically in this embodiment, the charging status parameters include the required voltage, required current, charging voltage measurement value, charging current measurement value and SOC value of the power battery; the charging pile status parameters include the current output voltage and current output current of the charging pile; the range extender status parameters include the current output voltage and current output current of the range extender.

[0033] (7) In response to the vehicle controller VCU receiving the charging end instruction sent by the on-board large screen IHU or the charging completion instruction sent by the power battery controller BMS, the vehicle controller VCU sends a charging stop instruction to the power battery controller BMS and the range extender controller RCU, and the power battery controller BMS sends the obtained charging stop instruction to the charging pile.

[0034] The charging end instruction is issued by the operator through the on-board large screen IHU. The charging completion instruction is usually determined by the SOC value. When the SOC value reaches the set value, charging is considered complete and a charging completion instruction is generated.

[0035] The embodiment of the present invention provides a method for charging a power battery of an extended-range fire truck, which can realize that a charging pile and a range extender can charge the power battery at the same time, greatly shortening the charging time and solving the problems of long DC charging time and only single charging mode.

[0036] Embodiment 2:

[0037] like Figure 2 and Figure 3 As shown, an embodiment of the present invention provides an extended-range fire truck, whose control system includes a vehicle controller VCU and a power battery controller BMS, an on-board large screen IHU and a range extender controller RCU, which are respectively connected to the vehicle controller VCU for communication. After the charging gun of the extended-range fire truck is plugged into the charging pile, the power battery controller BMS is connected to the charging pile for communication. In this embodiment, the communication connection is achieved through the CAN bus. The CAN bus plays an important role in the fields of automotive electronics, industrial control, etc. with its advantages of high reliability, high real-time performance, strong flexibility, low cost, easy maintenance and diagnosis, and standardization.

[0038] Its voltage system includes: power battery distribution box BDU and high-voltage distribution box PDU. The charging pile and power battery distribution box BDU are connected by a high-voltage wire harness, the power battery distribution box BDU and the power battery are connected by a high-voltage wire harness, the power battery distribution box BDU and the high-voltage distribution box PDU are connected by a high-voltage wire harness, the high-voltage distribution box PDU and the range extender GCU are connected by a high-voltage wire harness, and the charging pile and the range extender GCU can charge the power battery at the same time.

[0039] Based on the above control system and voltage system, the steps of the power battery charging method provided in Example 1 are executed to achieve fast charging, which greatly shortens the charging time and thus meets the needs of airport use.

[0040] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0041] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0042] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0043] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for charging a power battery of an extended-range fire truck, wherein the extended-range fire truck comprises a vehicle controller VCU, a power battery controller BMS, an on-board large screen IHU and a range extender controller RCU respectively connected to the vehicle controller VCU in communication; characterized in that: The charging method comprises: In response to the completion of the plugging of the charging gun of the extended-range fire truck and the charging pile, the charging pile wakes up the power battery controller BMS, and the power battery controller BMS wakes up the vehicle controller VCU and enters a standby state; In response to the vehicle controller VCU receiving the fast charging instruction sent by the vehicle large screen IHU and the request charging instruction sent by the power battery controller BMS, the vehicle controller VCU sends a charging permission instruction to the power battery controller BMS and the range extender controller RCU; In response to the vehicle controller VCU receiving the charging parameter instruction and the charging pile performance parameter sent by the power battery controller BMS, the vehicle controller VCU calculates the range extender output power, and generates a range extender control instruction and sends it to the range extender controller RCU, and the extended-range fire truck enters a fast charging state; In response to the vehicle controller VCU receiving the charging end instruction sent by the on-board large screen IHU or the charging completion instruction sent by the power battery controller BMS, the vehicle controller VCU sends a charging stop instruction to the power battery controller BMS and the range extender controller RCU, and the power battery controller BMS sends the acquired charging stop instruction to the charging pile.

2. The method for charging the power battery of the extended-range fire truck according to claim 1, characterized in that: The charging pile waking up the power battery controller BMS includes: A CC1 signal and an A+ signal are sent to the power battery controller BMS, wherein the CC1 signal is used to confirm the connection status between the charging pile and the extended-range fire truck, and the A+ signal is used to wake up the power battery controller BMS.

3. The method for charging the power battery of the extended-range fire truck according to claim 1, characterized in that: The power battery controller BMS wakes up the vehicle controller VCU and enters the standby state, including: A high level signal and a standby state signal are sent to the vehicle controller VCU, wherein the high level signal is used to wake up the vehicle controller VCU, and the standby state signal is used to indicate entering a standby state.

4. The method for charging the power battery of the extended-range fire truck according to claim 1, characterized in that: In response to the power battery controller BMS receiving the high voltage instruction sent by the vehicle controller VCU, the power battery controller BMS pre-charges the power battery through the pre-charging circuit, and after the pre-charging is completed, sends a pre-charging completion instruction and a charging request instruction to the vehicle controller VCU.

5. The method for charging the power battery of the extended-range fire truck according to claim 1, characterized in that: In response to the vehicle controller VCU receiving the charging parameter instruction sent by the power battery controller BMS, the vehicle controller VCU sends the acquired charging parameter instruction to the range extender controller RCU.

6. The method for charging the power battery of the extended-range fire truck according to claim 1, characterized in that: The power battery controller BMS obtains charging pile performance parameters from the charging pile, and the charging pile performance parameters include: maximum output voltage, maximum output current, minimum output voltage and minimum output current of the charging pile; The charging parameter instruction includes: the maximum allowable charging voltage, the maximum allowable charging current, the current voltage and the current current of the power battery.

7. The method for charging the power battery of the extended-range fire truck according to claim 6, characterized in that: The output power of the range extender = the maximum charging power of the power battery - the maximum output power of the charging pile; The maximum charging power of the power battery = the maximum allowable charging voltage of the power battery × the maximum allowable charging current of the power battery; The maximum output power of the charging pile=the maximum output voltage of the charging pile×the maximum output current of the charging pile.

8. The method for charging a power battery of an extended-range fire truck according to claim 1, characterized in that: In response to the extended-range fire truck entering a fast charging state, the power battery controller BMS sends a charging state parameter to the charging pile and the vehicle controller VCU, and the vehicle controller VCU sends the acquired charging state parameter to the range extender controller RCU; The charging pile sends the charging pile status parameters to the power battery controller BMS, the range extender controller RCU sends the range extender status parameters to the vehicle controller VCU, and the vehicle controller VCU sends the acquired range extender status parameters to the power battery controller BMS.

9. The method for charging the power battery of the extended-range fire truck according to claim 8, characterized in that: The charging state parameters include the required voltage, required current, charging voltage measurement value, charging current measurement value and SOC value of the power battery; The charging pile state parameters include the current output voltage and current output current of the charging pile; The range extender state parameters include the current output voltage and the current output current of the range extender.

10. An extended-range fire truck, characterized in that: Rapid charging is achieved by adopting the steps of the method as described in any one of claims 1 to 9.

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