Electric motorcycle control system and electric motorcycle battery output control method

Abstract

The present invention discloses an electric motorcycle control system and an electric motorcycle battery output control method. The electric motorcycle control system includes at least one battery system and several controllers. Any one of the battery systems is provided with at least two power supply and signal interfaces, and any one of the controllers is provided with a controller connector, and the controller connector can be connected to any one of the power supply and signal interfaces. The present invention is conducive to the industrial mass production of electric motorcycles, facilitates the realization of standardized production, and enables different power characteristics to be obtained under the condition that the same vehicle model remains unchanged; when changing the number of batteries used, different connection modes can obtain different power performances, which not only realizes standardization but also strongly supports the requirements for the flexible diversity of product performance.

Description

Technical Field

[0001] The present invention relates to the technical field of motorcycles, and particularly to an electric motorcycle control system and an electric motorcycle battery output control method. Background Art

[0002] Electric motorcycles are in the initial stage of technological development. Motorcycle manufacturers have started to develop two-wheel, three-wheel, and four-wheel motorcycles powered by pure electric systems to meet the global development needs of new energy power.

[0003] In the prior art, the batteries of electric motorcycles are basically used in two forms. One is a large battery pack according to the vehicle configuration, and the other is the combined use of multiple battery packs. However, neither of the above two methods can simultaneously meet the requirements of independent battery packs and the combined use of multiple battery packs. Manufacturers must design different battery packs and different vehicle structures according to different performance and configuration requirements. The production is complex and the cost is relatively high, which is not conducive to the realization of standardized production.

[0004] Therefore, those skilled in the art are committed to developing an electric motorcycle control system and an electric motorcycle battery output control method that can adapt to different performance and configuration requirements and are conducive to the realization of standardized production. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an electric motorcycle control system and an electric motorcycle battery output control method that can adapt to different performance and configuration requirements and are conducive to the realization of standardized production.

[0006] To achieve the above object, the present invention provides an electric motorcycle control system, including at least one battery system and several controllers. Any one of the battery systems is provided with at least two power supply and signal interfaces, and any one of the controllers is provided with a controller connector, and the controller connector can be connected to any one of the power supply and signal interfaces.

[0007] Preferably, the battery system includes a battery and a BMS manager.

[0008] Preferably, each of the controllers is connected to a motor winding.

[0009] Preferably, the battery system and the controller are both connected to the CAN bus.

[0010] Preferably, a power line and a signal line are connected between the controller and the corresponding controller connector.

[0011] Preferably, the controller is connected to the motor winding through a motor Hall signal line and a motor phase line.

[0012] The present invention also provides a method for controlling the battery output of an electric motorcycle, which adopts the above-mentioned electric motorcycle control system, and is characterized in that it includes the following steps:

[0013] 1) The BMS manager identifies the number n of controllers inserted into its battery system and the address information.

[0014] 2) The BMS manager sends a message to the CAN bus after identifying the number of controllers and adjusting the current limiting value according to the controller address.

[0015] 3) The controller receives the message on the CAN bus and executes the battery single socket current output limit value I adjusted by the BMS manager according to the message data.

[0016] The method for controlling the battery output of an electric motorcycle is characterized in that the single socket current output limit value I in step 3) is obtained through the following formula:

[0017] I = I max / n

[0018] Where I max is the maximum rated current set by the controller.

[0019] The beneficial effects of the present invention are as follows: The present invention is conducive to the industrial mass production of electric motorcycles, conducive to the realization of standardized production, and can obtain different power characteristics under the condition that the same vehicle model remains unchanged; when changing the number of batteries used, different connection modes can obtain different power performances, which supports the requirements of flexible diversity of product performance while realizing standardization. Description of the Drawings

[0020] Figure 1 is the principle block diagram of a specific embodiment of the present invention. Specific Embodiment

[0021] The present invention will be further described below in conjunction with the drawings and embodiments.

[0022] Such as Figure 1As shown in the figure, an electric motorcycle control system includes at least one battery system and several controllers. In this embodiment, only two battery systems are shown, namely the first battery system 1 and the second battery system 2. In other embodiments, one or more battery systems can be set. Similarly, in this embodiment, two controllers are set, namely the first controller 3 and the second controller 4, which are respectively connected to two windings of the motor 7. In this embodiment, the motor 7 is a dual-winding hub motor. In other embodiments, there can be four controllers or other numbers of controllers, and one controller can be connected to one winding of the motor. Any battery system is provided with at least two power supply and signal interfaces. In this embodiment, the first battery system 1 is provided with the first power supply and signal interface 11 and the second power supply and signal interface 12; the second battery system 2 is provided with the third power supply and signal interface 21 and the fourth power supply and signal interface 22. Any controller is provided with a controller connector. In this embodiment, the first controller 3 is provided with the first controller connector 31, and the second controller 4 is provided with the second controller connector 41. The controller connectors 31 and 41 can be connected to any of the power supply and signal interfaces 11, 12, 21, and 22. If there are four controllers, all the controller connectors can be selected to be connected to the four power supply and signal interfaces set by different battery systems. In this embodiment, the controller connector is a plug in which the power plug and the signal plug are integrated into one body, which has the advantages of simple structure and convenient connection, and is a plug that can be commercially purchased in the prior art, so this will not be elaborated. Of course, the corresponding power interface and signal line interface are also integrally arranged. In other embodiments, the power plug and the signal plug, and the power interface and the signal line interface can also be separately arranged, but the structure is more complicated, but all can achieve the purpose of the present invention and are within the protection scope of the present invention.

[0023] The battery systems 1, 2 and the controllers 3, 4 are all connected to the CAN bus 5 for facilitating data transmission.

[0024] The battery system includes a battery and a BMS manager. There are power lines and signal lines 6 connected between controllers 3, 4 and their corresponding controller connectors 31, 41. It should be noted that the power lines and signal lines are two different lines. In the present invention, they are described together because their connection relationships are the same. When the controller connectors 31, 41 are inserted into the power and signal interfaces (any of the power and signal interfaces 11, 12, 21, 22) of the battery system, the controller transmits the corresponding controller address information to the battery BMS manager. The BMS manager adjusts the current limiting value according to the number of controllers connected and their corresponding addresses, and then sends a message to the CAN bus and transmits it to the CAN bus. After the controller receives the BMS control instruction corresponding to the address, it executes the current output limit value I of a single battery socket adjusted by the BMS manager, that is, the current limiting value of this controller. In this way, after the system current matching control of the battery BMS manager and the controller, electrical energy is input to the motor for operation. On the other hand, each controller in the present invention is connected to a motor winding, and only one motor winding is connected. The controllers 3, 4 and the motor winding are connected through the motor Hall signal line 8 and the motor phase line 9 to control the rotation of the motor.

[0025] The present invention also provides a method for controlling the battery output of an electric motorcycle, which adopts the above electric motorcycle control system, and is characterized in that it includes the following steps:

[0026] 1) The BMS manager identifies the number n of controllers inserted into its battery system and the address information;

[0027] 2) The BMS manager adjusts the current limiting value according to the identified number of controllers and the controller addresses, and then sends a message to the CAN bus;

[0028] 3) The controller receives the message on the CAN bus and executes the current output limit value I of a single battery socket adjusted by the BMS manager according to the message data.

[0029] In step 3), the current output limit value I of a single socket is obtained through the following formula:

[0030] I = I max / n

[0031] where I max is the maximum rated current set by the controller.

[0032] In this embodiment, there are multiple application methods, which can be applied to motorcycles with different configurations and performance requirements, and will not change the relevant hardware and software structures, realizing flexible standardized production. Taking the following two application methods as examples:

[0033] Method 1: Set the maximum rated current I allowed for the battery output maxis 50A (all data in this embodiment are for convenience of explanation and do not limit the protection scope of the present invention). If the first controller connector 31 of the first controller 3 and the second controller connector 41 of the second controller 4 are both inserted into the first battery system 1 and are respectively inserted into the first power supply and signal interface 11 and the second power supply and signal interface 12.

[0034] First, in this embodiment, the BMS manager identifies the number n of controllers inserted into the battery system where it is located and the address information. This address information can be collected through the signal line in the power line and signal line 6. In this embodiment, a design of 3-bit device signals is adopted. Two controllers are set. After the two controllers are connected to the battery system, the BMS manager will collect their information. For example, the address information data are 100 and 010 respectively. The first two bits represent the controller device code, and the last bit represents the signal of whether the controller is connected to the battery. For example, 1 means not connected, and 0 means connected (the BMS manager can generate a signal by detecting whether the ground wire is connected to the power supply and signal interface. Detecting a low potential of the device is determined as connected and the last bit of the address information generates 0, and a high potential is determined as not connected and the last bit of the address information generates 1). In this way, the BMS manager will generate a message of the addresses of two (quantity) controllers connected in the same battery. Therefore, it can accurately identify which device code it is and send this request message to the CAN bus. The corresponding controller receives the message on the CAN bus and adjusts the single socket current output limit I of the battery (the battery in the first battery system 1 in this embodiment) according to the message data. Therefore, the first battery system 1 outputs a single socket current output limit I = 50 / 2 = 25A to the first controller 3 and the second controller 4 (that is, the maximum current output by each single socket after being current-limited by the controller is 25A. At this time, the maximum current obtained by the motor is 25A * 2 = 50A, and the motor output power is relatively low.

[0035] Method 2: Set the maximum rated current I max is 50A. If the first controller connector 31 of the first controller 3 is inserted into any controller interface 11, 12 of the first battery system 1, and the second controller connector 41 of the second controller 4 is inserted into any controller interface 21, 22 of the second battery system 2. For the first battery system, perform the above steps 1) to 3). Finally, it can be obtained that for the battery of the first battery system, its single socket current output limit I1 = 50 / 1 = 50A. Similarly, for the second battery system, perform the above steps 1) to 3). Finally, it can be obtained that for the battery of the second battery system, its single socket current output limit I2 = 50 / 1 = 50A. Under other unchanged conditions, the maximum current Imax obtained by the motor = I1 + I2 = 100A. At this time, the motor output power is high.

[0036] As can be seen from the above application methods 1 and 2, without changing the structure of the battery system, controller and other structures, we can connect different controllers to a battery system (such as method 1) to meet the procurement needs of some customers for low-performance and low-configuration electric vehicles, thereby reducing the use of one battery system without affecting other structures of the motorcycle, which is conducive to standardized mass production. Similarly, when some customers have the need for high-configuration and high-performance electric motorcycles, each controller can be connected to a battery system (for example, set three battery systems and four controllers, where two controllers are separately connected to one battery system, and the other two controllers are jointly connected to one battery system; if four battery systems and four controllers are set, then each controller can be separately connected to one battery system). If an electric motorcycle is equipped with four controllers and connected to a four-winding motor, by using the present invention, up to four battery systems can be set, and one controller can be connected to one battery system. Each battery system can output a maximum current of 50A, which can greatly improve the performance and endurance of the electric motorcycle. At the same time, when the enterprise is producing, it will not change the battery system structure, controller, control method, etc., which is conducive to standardized production and improves production efficiency. Through the present invention, it can be ensured that whether one controller or two controllers are used for the battery system, the overall current management of the battery remains unchanged.

[0037] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. An electric motorcycle control system, characterized in that: It includes at least one battery system and several controllers. Any one of the battery systems is provided with at least two power supply and signal interfaces, and any one of the controllers is provided with a controller connector, and the controller connector can be connected to any one of the power supply and signal interfaces; The battery system includes a battery and a BMS manager; both the battery system and the controller are connected to the CAN bus; It also includes the following electric motorcycle battery output control method: 1) The BMS manager identifies the number n of controllers inserted into the battery system where it is located and the address information; 2) The BMS manager sends a message to the CAN bus after adjusting the current limiting value according to the identified number of controllers and the controller addresses; 3) The controller receives the message on the CAN bus and executes the battery single socket current output limit value I adjusted by the BMS manager according to the message data; The single socket current output limit value I is obtained through the following formula: I=I max / n Where I max is the maximum rated current set by the controller.

2. The electric motorcycle control system according to claim 1, characterized in that: Each of the controllers is connected to a motor winding.

3. The electric motorcycle control system according to claim 1, characterized in that: A power line and a signal line are connected between the controller and the corresponding controller connector.

4. The electric motorcycle control system according to claim 3, characterized in that: The controller is connected to the motor winding through a motor Hall signal line and a motor phase line.

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