Multi-battery system, motor control module and battery module

Abstract

The utility model provides a multi-battery system, a motor control module and a battery module. The multi-battery system is used for supplying power to the motor and comprises a motor control module; the first battery module and the second battery module respectively comprise a first connector, the first connector is coupled with the motor control module, the first connector comprises a pair of first signal line pins, and a series terminal resistor and a switch are coupled between the pair of first signal line pins; and the first battery module and the second battery module are communicated with the motor control module through the first battery module or the second battery module which is provided with the metal-oxide-semiconductor field effect transistor switch.

Description

Technical Field

[0001] This utility model relates to a multi-battery system, a motor control module, and a battery module, and more particularly to a multi-battery system, a motor control module, and a battery module capable of adjusting the configuration of the terminal resistance. Background Technology

[0002] The battery module communicates with the motor control module via a Controller Area Network (CAN) bus. Both the battery module and the motor control module connectors are equipped with terminating resistors of typically 120 ohms. Therefore, when the connectors of the battery module and the motor control module are connected, the terminating resistors at both ends are matched to reduce signal reflections on the signal lines. In electric vehicle applications, multiple battery modules are typically configured. However, if each battery module were equipped with a terminating resistor, it would lead to matching failures and communication errors.

[0003] Therefore, adjusting the terminating resistor configuration on the connectors of multiple battery modules has become one of the goals the industry is striving for. Utility Model Content

[0004] The purpose of this invention is to provide a multi-battery system, a motor control module, and a battery module, which can adjust the terminating resistor configuration on the connectors of multiple battery modules; when the connectors of the multi-battery module and the motor control module are connected, the terminating resistors at both ends will be matched to avoid communication errors and reduce signal reflection on the signal lines.

[0005] To achieve the above objectives, this utility model provides a multi-battery system, a motor control module, and a battery module. The multi-battery system, used to power the motor, includes:

[0006] Motor control module; and

[0007] A first battery module and a second battery module, wherein the first battery module and the second battery module respectively comprise:

[0008] A first connector is coupled to the motor control module. The first connector includes a pair of first signal line pins, and a series terminating resistor and a MOS (metal-oxide-semiconductor) switch are coupled between the pair of first signal line pins.

[0009] The first battery module and the second battery module communicate with the motor control module through the first battery module or the second battery module having the MOS switch turned on.

[0010] Preferably, the motor control module includes:

[0011] Main connectors, including:

[0012] Main ground pin; and

[0013] The primary decision pin, wherein the primary decision pin is coupled to the primary ground pin; and

[0014] The second connector, including

[0015] The second grounding pin; and

[0016] Second judgment pin;

[0017] The first battery module and the second battery module each include a microcontroller, and the first connector also includes a first ground pin and a first judgment pin;

[0018] Wherein, when the first connector of the first battery module is connected to one of the main connector and the second connector of the motor control module, and the first connector of the second battery module is connected to the other of the main connector and the second connector of the motor control module, the microcontroller of the first battery module performs the following steps:

[0019] Determine whether the first determination pin in the first battery module is connected to the main determination pin or the second determination pin;

[0020] When the first judgment pin is connected to the main judgment pin, the MOS switch in the first battery module is turned on; and

[0021] When the first judgment pin is connected to the second judgment pin, the MOS switch in the first battery module is disconnected.

[0022] Preferably, the microcontroller of the second battery module is used to perform the following steps:

[0023] Determine whether the first determination pin in the second battery module is connected to the main determination pin or the second determination pin;

[0024] When the first judgment pin is connected to the main judgment pin, the MOS switch in the second battery module is turned on; and

[0025] When the first judgment pin is connected to the second judgment pin, the MOS switch in the second battery module is disconnected.

[0026] Preferably, the first connector, the second connector, and the main connector are controller area network buses.

[0027] Preferably, a motor control module is used to manage the power supply from the first battery module and the second battery module to the motor, the first battery module and the second battery module respectively comprising:

[0028] The first connector, coupled to the motor control module, includes:

[0029] A pair of first signal line pins, with a series terminating resistor and a MOS switch coupled between the pair of first signal line pins;

[0030] The first battery module and the second battery module communicate with the motor control module through the first battery module or the second battery module having the MOS switch turned on.

[0031] Preferably, the motor control module includes:

[0032] Main connectors, including:

[0033] Main ground pin; and

[0034] The primary decision pin is coupled to the primary ground pin; and

[0035] The second connector includes:

[0036] The second grounding pin; and

[0037] Second judgment pin;

[0038] The first battery module and the second battery module each include a microcontroller; and the first connector also includes a first ground pin and a first judgment pin.

[0039] Wherein, when the first connector of the first battery module is connected to one of the main connector and the second connector of the motor control module, and the first connector of the second battery module is connected to the other of the main connector and the second connector of the motor control module, the microcontroller of the first battery module performs the following steps:

[0040] Determine whether the first determination pin in the first battery module is connected to the main determination pin or the second determination pin;

[0041] When the first judgment pin is connected to the main judgment pin, the MOS switch in the first battery module is turned on; and

[0042] When the first judgment pin is connected to the second judgment pin, the MOS switch in the first battery module is disconnected.

[0043] Preferably, the first connector, the second connector, and the main connector are controller area network buses.

[0044] Preferably, the battery module, used to supply power to the motor through the motor control module, includes:

[0045] The first connector includes:

[0046] A pair of first signal line pins, with a series terminating resistor and a MOS switch coupled between the pair of first signal line pins;

[0047] When the switch is turned on, the battery module communicates with the motor control module.

[0048] Preferably, the battery module also includes:

[0049] microcontrollers; and

[0050] The first connector also includes:

[0051] First grounding pin; and

[0052] First judgment pin;

[0053] The motor control module includes:

[0054] Main connectors, including:

[0055] Main ground pin; and

[0056] The primary decision pin, wherein the primary decision pin is coupled to the primary ground pin; and

[0057] The second connector includes:

[0058] The second grounding pin; and

[0059] Second judgment pin;

[0060] When the first connector of the battery module is connected to the main connector or the second connector of the motor control module, the microcontroller of the battery module performs the following steps:

[0061] Determine whether the first determination pin is connected to the main determination pin or the second determination pin;

[0062] When the first decision pin is connected to the main decision pin, the MOS switch is turned on; and

[0063] When the first judgment pin is connected to the second judgment pin, the MOS switch is turned off.

[0064] Preferably, the first connector, the second connector, and the main connector are controller area network buses.

[0065] Compared with existing technologies, the multi-battery system provided by this utility model includes a motor control module and multiple battery modules. Each battery module includes a first connector, which has a pair of first signal line pins. A terminating resistor and a MOS switch are coupled in series between the pair of first signal line pins. The microcontroller of the battery module connected to the main connector of the motor control module can turn on its switch to couple the terminating resistor between the signal pins; while the microcontrollers of other battery modules not connected to the main connector of the motor control module can turn off their switches. In this way, when the connectors of the multiple battery modules and the motor control module are connected, the terminating resistors at both ends will be matched and the signal reflection on the signal lines will be reduced. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the multi-battery system according to Embodiment 1 of this utility model.

[0067] Figure 2 This is a schematic diagram of the connection of a multi-battery system according to an embodiment of the present invention.

[0068] Figure 3 This is a connection diagram of a multi-battery system according to another embodiment of the present invention.

[0069] Figure 4 This is a flowchart of the microcontroller execution steps in an embodiment of the present invention. Detailed Implementation

[0070] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0071] Certain terms are used in the specification and claims to refer to specific elements. It will be understood by those skilled in the art that manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." Furthermore, the term "coupled" herein includes any direct and indirect electrical connection means. Therefore, if a first device is described as coupled to a second device, it means that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0072] Please refer to Figure 1 , Figure 1This is a schematic diagram of a multi-battery system 1 according to Embodiment 1 of the present invention. The multi-battery system 1 includes multiple battery modules and a motor control module 20. The motor control module 20 is coupled to the multiple battery modules and is used to control the power supply from the multiple battery modules to the motor 30. It should be noted that the multi-battery system 1 of the present invention can be applied to electric vehicles, but is not limited thereto. Furthermore, for ease of explanation, in the following embodiments, the multiple battery modules are all exemplified by the first battery module 10 and the second battery module 12; those skilled in the art can derive more than two battery modules accordingly.

[0073] For details, please refer to Figure 2 , Figure 2 This is a detailed schematic diagram of the multi-battery system 1 according to an embodiment of the present invention. The first battery module 10 and the second battery module 12 can be the same battery module, and each includes microcontrollers 102 and 122 and first connectors 104 and 124, respectively. The first connectors 104 and 124 each include a pair of first signal line pins CANH1 and CANL1, a first decision pin SYS1, and a first ground pin GND1, wherein the first signal line pins CANH1 and CANL1 are coupled in series with a first terminating resistor RT1 and a MOS switch SW. It should be noted that the switch SW of the present invention can be formed by a metal-oxide-semiconductor field-effect transistor (MOSFET), which can achieve power saving compared to optocoupler switches and avoids the communication frequency matching problem of optocoupler switches. In addition, the MOSFET switch can withstand a voltage of 100V, which is better than the 5V withstand voltage of the optocoupler switch. The motor control module 20 includes a main connector 204 and a second connector 224. The main connector 204 and the second connector 224 each include a pair of second signal line pins CANH2 and CANL2, a second decision pin SYS2, and a second ground pin GND2. Furthermore, the second signal line pins CANH2 and CANL2 in the main connector 204 and the second connector 224 are coupled to the same second terminating resistor RT2. It should be noted that the difference between the main connector 204 and the second connector 224 is that the second decision pin SYS2 and the second ground pin GND2 in the main connector 204 are coupled to each other and serve as the main decision pin and the main ground pin, respectively. On the other hand, the second decision pin SYS2 and the second ground pin GND2 in the second connector 224 are not coupled to each other. Additionally, the first connectors 104 and 124, the main connector 204, and the second connector 224 can be a Controller Area Network (CAN) bus, but are not limited to this.

[0074] In one embodiment, when the first connector 104 is connected to the main connector 204 and the first connector 124 is connected to the second connector 224, the microcontrollers 102 and 122 can respectively detect the connection status of the first judgment pin SYS1 of the first connector 104 and the first connector 124. Specifically, as shown in the following embodiment... Figure 2 As shown, the second decision pin SYS2 and the second ground pin GND2 of the main connector 204 are coupled to each other. In other words, the first decision pin SYS1 of the first connector 104, the second decision pin SYS2 of the main connector 204, and the second ground pin GND2 are all in a logic low state. Therefore, when the microcontroller 102 receives a logic low signal from the first decision pin SYS1, it can determine that the first connector 104 is connected to the main connector 204 and output the decision result DET to turn on the switch SW of the first battery module 10. On the other hand, the second decision pin SYS2 and the second ground pin GND2 of the second connector 224 are not coupled to each other. In other words, the first decision pin SYS1 of the first connector 124, the second decision pin SYS2 of the second connector 224, and the second ground pin GND2 are all in a logic high state. Therefore, when the microcontroller 122 receives a logic high signal from the first decision pin SYS1, it can determine that the first connector 124 is connected to the second connector 224 and output the decision result DET to turn off the switch SW of the second battery module 12. In this way, the first battery module 10 and the second battery module 12 share a first terminating resistor RT1, which is matched with the second terminating resistor RT2 of the motor control module 20 to reduce signal reflection on the signal line. In other words, the first battery module 10 and the second battery module 12 communicate with the motor control module 20 through the first battery module 10 with the switch SW turned on.

[0075] In another embodiment, when the first connector 104 is connected to the second connector 224 and the first connector 124 is connected to the main connector 204, the microcontrollers 102 and 122 can respectively detect the connection status of the first judgment pin SYS1 of the first connector 104 and the first connector 124. Specifically, as Figure 3As shown, the second decision pin SYS2 and the second ground pin GND2 of the main connector 204 are coupled to each other. In other words, the first decision pin SYS1 of the first connector 124, the second decision pin SYS2 of the main connector 204, and the second ground pin GND2 are all in a logic low state. Therefore, when the microcontroller 122 receives a logic low signal from the first decision pin SYS1, it can determine that the first connector 124 is connected to the main connector 204 and output the decision result DET to turn on the switch SW of the second battery module 12. On the other hand, the second decision pin SYS2 and the second ground pin GND2 of the second connector 224 are not coupled to each other. In other words, the first decision pin SYS1 of the first connector 104, the second decision pin SYS2 of the second connector 224, and the second ground pin GND2 are all in a logic high state. Therefore, when the microcontroller 102 receives a logic high signal from the first decision pin SYS1, it can determine that the first connector 104 is connected to the second connector 224 and output the decision result DET to turn off the switch SW of the first battery module 10. In this way, the first battery module 10 and the second battery module 12 share a first terminating resistor RT1, which is matched with the second terminating resistor RT2 of the motor control module 20 to reduce signal reflection on the signal line. In other words, the first battery module 10 and the second battery module 12 communicate with the motor control module 20 through the second battery module 12 with the switch SW turned on.

[0076] Finally, the operation of the microcontrollers 102 and 122 in the multi-battery system 1 can be summarized as process 4, as follows: Figure 4 As shown. When the first connector 104 of the first battery module 10 is connected to one of the main connector 204 and the second connector 224 of the motor control module 20, and the first connector 124 of the second battery module 12 is connected to the other of the main connector 204 and the second connector 224 of the motor control module 20, the microcontrollers 102 and 122 of the first battery module 10 and the second battery module 12 respectively execute process 4, which includes the following steps:

[0077] Step S400: Begin.

[0078] Step S402: Determine whether the first judgment pin is connected to the main judgment pin or the second judgment pin.

[0079] Step S404: When the first judgment pin is connected to the main judgment pin, the switch is turned on.

[0080] Step S406: When the first judgment pin is connected to the second judgment pin, disconnect the switch.

[0081] Step S408: End.

[0082] Reference Figures 2-3 Specifically, the microcontroller 102 of the first battery module 10 performs the following steps:

[0083] Step S400: Begin.

[0084] Step S402: Determine whether the first determination pin SYS1 of the first connector 104 is connected to the main determination pin SYS2 of the main connector 204 or the second determination pin SYS2 of the second connector 224.

[0085] Step S404: When the first judgment pin SYS1 of the first connector 104 is connected to the main judgment pin SYS2 of the main connector 204, the MOS switch SW of the first battery module 10 is turned on.

[0086] Step S406: When the first judgment pin SYS1 of the first connector 104 is connected to the second judgment pin SYS2 of the second connector 224, the MOS switch SW of the first battery module 10 is disconnected.

[0087] In addition, the microcontroller 122 of the second battery module 12 performs the following steps:

[0088] Step S400: Begin.

[0089] Step S402: Determine whether the first determination pin SYS1 of the first connector 124 is connected to the main determination pin SYS2 of the main connector 204 or the second determination pin SYS2 of the second connector 224.

[0090] Step S404: When the first judgment pin SYS1 of the first connector 124 is connected to the main judgment pin SYS2 of the main connector 204, the MOS switch SW of the second battery module 10 is turned on.

[0091] Step S406: When the first judgment pin SYS1 of the first connector 124 is connected to the second judgment pin of the second connector 224, disconnect the MOS switch SW of the second battery module 10.

[0092] Step S408: End.

[0093] For details regarding the derivative changes of process 4 and their explanations, please refer to the foregoing description, which will not be repeated here.

[0094] In summary, the multi-battery system of this invention couples the second judgment pin and the second ground pin in the main connector of the motor control module, making the second judgment pin the main judgment pin with a logic low state. Therefore, the microcontroller of the battery module connected to the main connector can turn on the switch to couple the terminating resistor between the signal pins. Meanwhile, the microcontrollers of other battery modules not connected to the main connector can turn off the switch. In this way, when the connectors of the multi-battery module and the motor control module are connected, the terminating resistors at both ends will be matched to reduce signal reflection on the signal lines.

[0095] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A multi-battery system for supplying power to a motor, characterized in that, Includes: Motor control module; and A first battery module and a second battery module, wherein the first battery module and the second battery module respectively comprise: A first connector is coupled to the motor control module. The first connector includes a pair of first signal line pins, and a series terminating resistor and a MOS switch are coupled between the pair of first signal line pins. The first battery module and the second battery module communicate with the motor control module through the first battery module or the second battery module having the MOS switch turned on.

2. The multi-battery system as described in claim 1, characterized in that, The motor control module includes: Main connectors, including: Main ground pin; and The primary decision pin, wherein the primary decision pin is coupled to the primary ground pin; and The second connector, including The second grounding pin; and Second judgment pin; The first battery module and the second battery module each include a microcontroller, and the first connector also includes a first ground pin and a first judgment pin; Wherein, when the first connector of the first battery module is connected to one of the main connector and the second connector of the motor control module, and the first connector of the second battery module is connected to the other of the main connector and the second connector of the motor control module, the microcontroller of the first battery module is configured to perform the following steps: Determine whether the first determination pin in the first battery module is connected to the main determination pin or the second determination pin; When the first judgment pin is connected to the main judgment pin, the MOS switch in the first battery module is turned on; and When the first judgment pin is connected to the second judgment pin, the MOS switch in the first battery module is disconnected.

3. The multi-battery system as described in claim 2, characterized in that, The microcontroller of the second battery module is used to perform the following steps: Determine whether the first determination pin in the second battery module is connected to the main determination pin or the second determination pin; When the first judgment pin is connected to the main judgment pin, the MOS switch in the second battery module is turned on; as well as When the first judgment pin is connected to the second judgment pin, the MOS switch in the second battery module is disconnected.

4. The multi-battery system as described in claim 2, characterized in that, The first connector, the second connector, and the main connector are controller area network buses.

5. A motor control module for managing the supply of power from a first battery module and a second battery module to a motor, characterized in that, The first battery module and the second battery module each include: The first connector, coupled to the motor control module, includes: A pair of first signal line pins, with a series terminating resistor and a MOS switch coupled between the pair of first signal line pins; The first battery module and the second battery module communicate with the motor control module through the first battery module or the second battery module having the MOS switch turned on.

6. The motor control module as described in claim 5, characterized in that, Include: Main connectors, including: Main ground pin; and The primary decision pin is coupled to the primary ground pin; and The second connector includes: The second grounding pin; and Second judgment pin; The first battery module and the second battery module each include a microcontroller; and the first connector also includes a first ground pin and a first judgment pin. Wherein, when the first connector of the first battery module is connected to one of the main connector and the second connector of the motor control module, and the first connector of the second battery module is connected to the other of the main connector and the second connector of the motor control module, the microcontroller of the first battery module is configured to perform the following steps: Determine whether the first determination pin in the first battery module is connected to the main determination pin or the second determination pin; When the first judgment pin is connected to the main judgment pin, the MOS switch in the first battery module is turned on; and When the first judgment pin is connected to the second judgment pin, the MOS switch in the first battery module is disconnected.

7. The motor control module as described in claim 6, characterized in that, The first connector, the second connector, and the main connector are controller area network buses.

8. A battery module for supplying power to a motor via a motor control module, characterized in that, Includes: The first connector includes: A pair of first signal line pins, with a series terminating resistor and a MOS switch coupled between the pair of first signal line pins; When the switch is turned on, the battery module communicates with the motor control module.

9. The battery module as described in claim 8, characterized in that, Also includes: microcontrollers; and The first connector also includes: First grounding pin; and First judgment pin; The motor control module includes: Main connectors, including: Main ground pin; and The primary decision pin, wherein the primary decision pin is coupled to the primary ground pin; and The second connector includes: The second grounding pin; and Second judgment pin; Wherein, after the first connector of the battery module is connected to the main connector or the second connector of the motor control module, the microcontroller of the battery module is configured to perform the following steps: Determine whether the first determination pin is connected to the main determination pin or the second determination pin; When the first decision pin is connected to the main decision pin, the MOS switch is turned on; and When the first judgment pin is connected to the second judgment pin, the MOS switch is turned off.

10. The battery module as described in claim 9, characterized in that, The first connector, the second connector, and the main connector are controller area network buses.

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