A method for tracking energy consumption of battery-swap vehicles based on a monitoring platform

Abstract

The present invention relates to a method for tracking energy consumption of a battery-swap vehicle based on a monitoring platform, and the battery management system of the battery-swap vehicle is replaced synchronously each time the battery is replaced. The method for tracking energy consumption of a battery-swap vehicle based on a monitoring platform latches the total cumulative power consumption of the current vehicle calculated in the VCU each time the battery-swap vehicle is turned off and powered on. When the battery-swap vehicle is turned on and powered on after undergoing a battery swap, the VCU relies on the battery swap flag to identify the battery swap action and calculates correction parameters according to the current battery cumulative discharge amount forwarded by the BSM at the current moment and the current vehicle cumulative total power consumption latched by the VCU when the battery-swap vehicle was turned off and powered on before the current battery swap action is executed, and uses the correction parameters to correct the current battery cumulative discharge amount forwarded in real time by the BSM. The method for tracking energy consumption of a battery-swap vehicle based on a monitoring platform of the present invention is highly versatile, and does not require changes to the energy consumption tracking method of the original monitoring platform, so as to effectively achieve tracking of the energy usage of the battery-swap vehicle throughout its life cycle.

Description

Technical Field

[0001] The present invention relates to a method for monitoring energy consumption of an electric vehicle, and in particular to a method for tracking energy consumption of a battery-swap vehicle based on a monitoring platform. Background Art

[0002] There are two main ways to replenish energy for pure electric vehicles: charging and battery replacement. Compared with the traditional charging pile replenishment method, the vehicle-battery separation battery replacement mode has the characteristics of high efficiency and low cost. There are two main ways to replace the battery pack only and replace the battery pack and the battery management system BMS at the same time. The battery replacement method of replacing the battery pack and the battery management system BMS at the same time is the mainstream way of replacing the battery for electric vehicles.

[0003] In the short-distance transportation of passenger and cargo vehicles in closed scenarios such as airports, ports, mines, factories, and construction sites, battery-swap vehicles, especially heavy-duty battery-swap vehicles such as heavy trucks, have great application potential. As the energy management system of the battery, the battery management system BMS stores the real-time usage information of the battery energy in the BMS. After the battery-swap vehicle performs the battery-swap operation, the BMS is also replaced, and it is impossible to track the energy usage of the battery-swap vehicle throughout its life cycle, that is, it is impossible to track the energy consumption throughout its life cycle. Since closed scenarios often rely on monitoring platforms to track the energy consumption levels of all specific battery-swap vehicles in the scenario, the total power consumption information required for the monitoring platform to track the energy consumption level of the vehicle comes from the BMS real-time calculation and forwarding data. The total power consumption data obtained by the monitoring platform will change with the replacement of the BMS, affecting the accuracy of the data and even causing software failures. Summary of the invention

[0004] The present invention provides a method for tracking energy consumption of battery-swap vehicles based on a monitoring platform to solve the above-mentioned problems.

[0005] The present invention adopts the following technical solution:

[0006] A method for tracking energy consumption of a battery-swap vehicle based on a monitoring platform. The battery-swap vehicle is a pure electric vehicle, and a battery management system is replaced synchronously with each battery swap of the battery-swap vehicle.

[0007] The battery-swap vehicle energy consumption tracking method based on the monitoring platform includes the following steps:

[0008] Ⅰ. During the operation of the battery-swapping vehicle, the vehicle control system of the battery-swapping vehicle interacts with the above-mentioned battery management system. The battery management system calculates the current battery cumulative discharge amount a in real time and forwards it to the vehicle control system. The vehicle control system receives the battery cumulative discharge amount a and calculates the current vehicle's cumulative total power consumption q.

[0009] Ⅱ. Each time the battery swap vehicle is shut down, the above vehicle control system latches the value of the current vehicle's cumulative total power consumption q. From the first shutdown of the battery swap vehicle, the second shutdown of the battery swap vehicle to the m-1th shutdown of the battery swap vehicle, and the mth shutdown of the battery swap vehicle, the values ​​of the current vehicle's cumulative total power consumption q latched by the vehicle control system are defined as q1, q2, ..., q m-1 ,q m , m is a positive integer.

[0010] Ⅲ. After each battery swap, the battery swap vehicle will be marked with a battery swap flag.

[0011] IV. Each time the battery-swapping vehicle is turned on and powered on, the vehicle control system reads the above-mentioned battery-swapping flag. When the battery-swapping vehicle is turned on and powered on, the vehicle control system identifies the battery-swapping mark of the battery-swapping flag, and resets the battery-swapping flag after the vehicle control system updates the battery-swapping data. The above-mentioned battery-swapping data update includes receiving and latching the value of the current battery cumulative discharge amount a forwarded by the current battery management system. From the first battery swap of the battery-swapping vehicle, the second battery swap of the battery-swapping vehicle to the n-1th battery swap of the battery-swapping vehicle, and the nth battery swap of the battery-swapping vehicle, the values ​​of the current battery cumulative discharge amount a latched by the battery-swapping vehicle when the battery-swapping data is updated are defined as a1, a2,…, a1, respectively. n-1 、a n , n is a positive integer.

[0012] V. When the battery swapping vehicle is in operation, q = a + k. Where k is a correction parameter. The value of k is adjusted accordingly after each battery swapping of the battery swapping vehicle. From the time when the battery swapping vehicle has not swapped batteries, after the first battery swapping of the battery swapping vehicle, after the n-1th battery swapping of the battery swapping vehicle, and after the nth battery swapping of the battery swapping vehicle, the correction parameter k is defined as k0, k1, ..., k n-1 , k n The above-mentioned battery replacement data update also includes updating the value of the correction parameter k after the battery replacement.

[0013] The value update process of the correction parameter k is as follows: when the battery swapping vehicle is powered on after being powered off for the mth time and is powered on after the battery swapping is completed, this battery swapping is defined as the nth battery swapping performed by the battery swapping vehicle, and the value of the correction parameter k is k n , k n =q m -a n .

[0014] VI. During the operation of the battery-swapping vehicle, the vehicle control system forwards the calculated current vehicle cumulative total power consumption q to the monitoring platform.

[0015] Further:

[0016] In the above step V, k0=0.

[0017] The above-mentioned battery-swap vehicle is turned on and powered on at least once before the first battery swap.

[0018] The above-mentioned battery-swap vehicles must shut down the power before each battery swap.

[0019] The monitoring platform in step VI is a cloud platform used to simultaneously monitor several battery-swapping vehicles.

[0020] The above step VI also includes that during the operation of the above battery-swap vehicle, the above vehicle control system forwards the current vehicle's accumulated total mileage s to the above monitoring platform.

[0021] The monitoring platform and the vehicle control system exchange data via the wireless communication module. During the operation of the battery-swapping vehicle, the data interaction between the vehicle control system and the monitoring platform includes real-time interaction, scheduled interaction, and irregular interaction.

[0022] The battery swapping vehicle is a passenger or freight vehicle in a closed scene. The monitoring platform is a monitoring platform applied to the closed scene. The closed scene includes an airport, a port, a mine, a factory, and a construction site.

[0023] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following advantages:

[0024] The energy consumption tracking method for battery-swap vehicles based on a monitoring platform of the present invention is highly versatile and can effectively track the energy usage of battery-swap vehicles throughout their life cycle without changing the energy consumption tracking method of the original monitoring platform. It can then be combined with mileage data to further track energy consumption throughout the life cycle.

[0025] This method is extremely practical for tracking the energy consumption of passenger and cargo vehicles, including battery-swap heavy trucks, in closed scenarios. The application of the battery-swap vehicle energy consumption tracking method based on a monitoring platform of the present invention requires basically no equipment modification to the original battery-swap vehicles and the monitoring platform. The software required for the application of the battery-swap vehicle energy consumption tracking method based on a monitoring platform of the present invention is easy to upgrade, the solution has low application cost and is easy to promote, and has strong market competitiveness. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are described below.

[0027] A method for tracking energy consumption of a battery-swap vehicle based on a monitoring platform, wherein the battery-swap vehicle is a pure electric vehicle, and the battery management system of the battery-swap vehicle is replaced synchronously each time the battery is replaced. Specifically, the battery-swap vehicle of this specific embodiment is a passenger or freight vehicle in a closed scene, and correspondingly, the monitoring platform is a monitoring cloud platform for monitoring a number of battery-swap vehicles in the closed scene. Common closed scenes include airports, ports, mines, factories, construction sites and even urban dump trucks. The battery-swap vehicle can specifically be a pure electric drive vehicle for short-distance transportation such as a battery-swap heavy truck.

[0028] The battery-swap vehicle energy consumption tracking method based on the monitoring platform includes the following steps:

[0029] Ⅰ. During the operation of the battery-swapping vehicle, the vehicle control system of the battery-swapping vehicle interacts with the above-mentioned battery management system. The battery management system calculates the current battery cumulative discharge amount a in real time and forwards it to the vehicle control system. The vehicle control system receives the battery cumulative discharge amount a and calculates the current vehicle's cumulative total power consumption q.

[0030] Ⅱ. Each time the battery swap vehicle is shut down, the above vehicle control system latches the value of the current vehicle's cumulative total power consumption q. From the first shutdown of the battery swap vehicle, the second shutdown of the battery swap vehicle to the m-1th shutdown of the battery swap vehicle, and the mth shutdown of the battery swap vehicle, the values ​​of the current vehicle's cumulative total power consumption q latched by the vehicle control system are defined as q1, q2, ..., q m-1 ,q m , m is a positive integer. According to the existing battery swapping regulations, battery swapping vehicles must be powered off before battery swapping. That is, a battery swapping vehicle may or may not perform a battery swap after being powered off; however, before a battery swapping vehicle is powered off, it must be powered off.

[0031] Ⅲ. After each battery swap, the battery swap vehicle will be marked with a battery swap flag.

[0032] IV. Each time the battery-swapping vehicle is turned on and powered on, the vehicle control system reads the above-mentioned battery-swapping flag. When the battery-swapping vehicle is turned on and powered on, the vehicle control system identifies the battery-swapping mark of the battery-swapping flag, and resets the battery-swapping flag after the vehicle control system updates the battery-swapping data. The above-mentioned battery-swapping data update includes receiving and latching the value of the current battery cumulative discharge amount a forwarded by the current battery management system. From the first battery swap of the battery-swapping vehicle, the second battery swap of the battery-swapping vehicle to the n-1th battery swap of the battery-swapping vehicle, and the nth battery swap of the battery-swapping vehicle, the values ​​of the current battery cumulative discharge amount a latched by the battery-swapping vehicle when the battery-swapping data is updated are defined as a1, a2,…, a1, respectively. n-1 、a n , n is a positive integer.

[0033] V. When the battery swapping vehicle is in operation, q = a + k. Where k is a correction parameter. The value of k is adjusted accordingly after each battery swapping of the battery swapping vehicle. From the time when the battery swapping vehicle has not swapped batteries, after the first battery swapping of the battery swapping vehicle, after the n-1th battery swapping of the battery swapping vehicle, and after the nth battery swapping of the battery swapping vehicle, the correction parameter k is defined as k0, k1, ..., k n-1 , k n The above battery replacement data update also includes updating the value of the correction parameter k after the battery replacement. k0=0.

[0034] The value update process of the correction parameter k is as follows: when the battery swapping vehicle is powered on after being powered off for the mth time and is powered on after the battery swapping is completed, this battery swapping is defined as the nth battery swapping performed by the battery swapping vehicle, and the value of the correction parameter k is k n , k n =q m -a n .

[0035] The above-mentioned power-on and power-on of the battery-swap vehicle and the battery-swap vehicle performing the battery-swap action all refer to the power-on and battery-swap performed before the vehicle leaves the factory. Normally, before the battery-swap vehicle performs the first battery-swap action, there will be at least one power-on, which can avoid the failure of the determination process of the value k1 due to the lack of q1. Of course, it is also possible to perform at least one power-on or latch a q0 before the battery-swap vehicle leaves the factory, and q0=0.

[0036] Ⅵ. During the operation of the battery-swapping vehicle, the vehicle control system forwards the calculated current vehicle cumulative total power consumption q and other information such as the current vehicle cumulative total mileage s to the monitoring platform. The above-mentioned monitoring platform and the above-mentioned vehicle control system exchange data through the wireless communication module. During the operation of the battery-swapping vehicle, the data interaction between the vehicle control system and the monitoring platform includes real-time interaction, scheduled interaction, irregular interaction, etc. The specific implementation method of this embodiment adopts the method of real-time forwarding. The monitoring platform monitors the use status of the battery-swapping vehicle based on the above-mentioned current vehicle cumulative total power consumption q, the current vehicle cumulative total mileage s and other information.

[0037] Specifically, the energy consumption tracking method of the battery-swap vehicle based on the monitoring platform is explained by tracking the energy consumption of the battery-swap vehicle throughout its life cycle:

[0038] Assume that the battery management system in the battery that comes with the battery swap vehicle when it leaves the factory is BMS0.

[0039] 1. Before the first battery swap, when the battery swap vehicle is in operation, the vehicle control system VCU calculates the current vehicle cumulative total power consumption q by receiving the current battery cumulative discharge a forwarded by BMS0, q=a+k0, k0=0 (k0 is defined for the convenience of description and distinction). When the battery swap vehicle is in operation, the VCU forwards the current vehicle cumulative total power consumption q, the current vehicle cumulative total mileage s and other information to the monitoring platform in real time.

[0040] During use, the battery swapping vehicle is repeatedly turned on and off for x times. Each time the battery swapping vehicle is turned off, the VCU will latch the value of q at the time of power off. The value of q latched by the VCU can overwrite the value latched last time when a new value is latched next time. When the battery swapping vehicle is turned off for the xth time, the value of q latched in the VCU is q x .

[0041] 2. After the battery swap vehicle is shut down for the m1th time, it performs the first battery swap in its life cycle, replacing the battery with BMS0 with the battery with BMS1. BMS1 contains the historical discharge information of the battery, such as its cumulative discharge amount. After the battery swap vehicle performs the first battery swap, its battery swap flag information changes from 0 to 1.

[0042] 3. After the battery-swap vehicle performs the first battery swap and is powered on, the VCU recognizes that the battery-swap flag information has changed to 1, and the battery-swap data is updated.

[0043] Battery swap data updates include:

[0044] 1. Receive and latch the value of the current battery cumulative discharge amount a forwarded by BMS1. For the convenience of description and distinction, this latched value is defined as a1.

[0045] 2. Update the value of the correction parameter k after battery replacement, that is, update the value from k0=0 to k1, k1=q x - a1.

[0046] 4. After the battery swap data is updated, reset the battery swap flag information and latch the modified parameter k value. After the first battery swap, when the battery swap vehicle is in operation, the vehicle control system VCU calculates the current vehicle cumulative total power consumption q by receiving the current battery cumulative discharge a forwarded by BMS1, q=a+k1.

[0047] 5. The battery-swapping vehicle operates until the second battery swap is performed...and for the nth battery swap, the above steps can be repeated during the battery swap process.

[0048] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A method for tracking energy consumption of a battery-swapping vehicle based on a monitoring platform, wherein the battery management system of the battery-swapping vehicle is replaced synchronously each time the battery is replaced; characterized in that: The following steps are involved: Ⅰ. During the operation of the battery swapping vehicle, the vehicle control system of the battery swapping vehicle interacts with the battery management system. The battery management system calculates the current battery cumulative discharge amount a in real time and forwards it to the vehicle control system. The vehicle control system receives the battery cumulative discharge amount a and calculates the current vehicle cumulative total power consumption q; Ⅱ. Each time the battery swap vehicle is shut down, the vehicle control system latches the value of the current vehicle's total cumulative power consumption q; from the first shutdown of the battery swap vehicle, the second shutdown of the battery swap vehicle to the m-1th shutdown of the battery swap vehicle, and the mth shutdown of the battery swap vehicle, the values ​​of the current vehicle's total cumulative power consumption q latched by the vehicle control system are defined as q1, q2, ..., q m-1 ,q m , m is a positive integer; III. After each battery swap, the battery swap vehicle will be marked with a battery swap sign; IV. Each time the battery-swapping vehicle is turned on and powered on, the vehicle control system reads the battery-swapping flag; when the battery-swapping vehicle is turned on and powered on, the vehicle control system identifies the battery-swapping mark of the battery-swapping flag, and resets the battery-swapping flag after updating the battery-swapping data; the battery-swapping data update includes receiving and latching the value of the current battery cumulative discharge amount a forwarded by the current battery management system; from the first battery swap of the battery-swapping vehicle, the second battery swap of the battery-swapping vehicle to the n-1th battery swap of the battery-swapping vehicle, and the nth battery swap of the battery-swapping vehicle, the values ​​of the current battery cumulative discharge amount a latched by the battery-swapping vehicle when the battery-swapping data is updated are defined as a1, a2, …, a n-1 、a n , n is a positive integer; V. During the operation of the battery swapping vehicle, q = a + k; where k is a correction parameter; the value of k is adjusted accordingly after each battery swapping of the battery swapping vehicle; from the time when the battery swapping vehicle has not swapped batteries, after the first battery swapping of the battery swapping vehicle, after the n-1th battery swapping of the battery swapping vehicle, and after the nth battery swapping of the battery swapping vehicle, the correction parameter k is defined as k0, k1, ..., k n-1 , k n ; The battery replacement data update also includes updating the value of the correction parameter k after the battery replacement; The value update process of the correction parameter k is as follows: when the battery swapping vehicle is powered on after being powered off for the mth time and is powered on after the battery swapping is completed, this battery swapping is defined as the nth battery swapping performed by the battery swapping vehicle, and the value of the correction parameter k is k n , k n =q m -a n ; Ⅵ. During the operation of the battery-swapping vehicle, the vehicle control system forwards the calculated current vehicle cumulative total power consumption q to the monitoring platform.

2. According to claim 1, a method for tracking energy consumption of battery-swap vehicles based on a monitoring platform is characterized in that: In step V, k0=0.

3. The method for tracking energy consumption of battery-swap vehicles based on a monitoring platform according to claim 1 is characterized in that: The battery-swapping vehicle shuts down the power before each battery swap.

4. The method for tracking energy consumption of battery-swap vehicles based on a monitoring platform according to claim 1 is characterized in that: The monitoring platform of step VI is a cloud platform used to monitor several battery-swapping vehicles at the same time.

5. A method for tracking energy consumption of battery-swap vehicles based on a monitoring platform according to claim 4, characterized in that: The step VI also includes that during the operation of the battery-swap vehicle, the vehicle control system forwards the current vehicle's accumulated total mileage s to the monitoring platform.

6. A method for tracking energy consumption of battery-swap vehicles based on a monitoring platform according to claim 4 or 5, characterized in that: The monitoring platform and the vehicle control system exchange data via a wireless communication module; during the operation of the battery-swapping vehicle, the data interaction between the vehicle control system and the monitoring platform includes real-time interaction, scheduled interaction, and irregular interaction.

7. The method for tracking energy consumption of battery-swap vehicles based on a monitoring platform according to claim 4 is characterized in that: The battery-swapping vehicle is a passenger or freight vehicle in a closed scene; the monitoring platform is a monitoring platform applied to the closed scene; the closed scene includes airports, ports, mines, factories, and construction sites.