Electric locomotive power system

Abstract

A power system for an electric locomotive includes a first charging connector, a second charging connector, a rechargeable battery, a communication module, a diode, a battery management module and a battery start-stop control module, wherein the first charging connector has a first charging power input port and a first power input port; the second charging connector has a second charging power input port and a second power input port; the communication module is connected to the first power input port; the diode is connected to the first and second power input ports; the battery management module is connected to the rechargeable battery, the communication module, the first and second charging power input ports; the battery start-stop control module triggers the battery management module according to a predetermined power of the first or second power input port, so that the charging power output by the first or second charging power input port charges the rechargeable battery.

Description

Technical Field

[0001] The present invention relates to electric vehicles; in particular, it relates to a power system of an electric vehicle. Background Art

[0002] The development of the vehicle industry is gradually moving towards high-efficiency, energy-saving, clean and relatively pollution-free power sources. Therefore, the power source of vehicles has evolved from early fuel engines to electric-driven power motors. The purpose is to reduce exhaust emissions and achieve sustainable development and energy conservation and carbon reduction. Especially for motorcycles, the exhaust emissions of fuel engine motorcycles are more serious than those of cars. Therefore, the development of electric motorcycles is the current trend.

[0003] Existing rechargeable batteries for electric motorcycles are divided into two types: replaceable and fixed. When a replaceable rechargeable battery is to be replaced, the rechargeable battery is pulled out from the vehicle body and replaced at a battery exchange station. A fixed rechargeable battery is charged using an external charging device, such as a charging station or a home charger.

[0004] It is known that a charging connector is provided on the body of an electric motorcycle with fixed charging. In addition to being connected to the connector of the charging pile (i.e., the charging gun), the charging connector can also be connected to the connector of a home charger. In order for the connector of the home charger to be connected to the charging connector on the vehicle body, the connector of the home charger must be the same as the connector of the charging pile. However, the charging current supplied by the charging pile is relatively high. In order to withstand the high current, the electrical properties of the connector material are required to be relatively high. Therefore, the cost of the connector is also relatively high. The current supplied by the home charger is low, but in order to be used with the charging connector on the vehicle body, a connector of the same specification must also be used, which increases the cost of the home charger. In addition to the cost of the connector, the charging pile and the communication module in the electric motorcycle must also communicate in order to charge. Therefore, the home charger also needs to add a communication component in order to communicate with the communication module for charging. The addition of communication components also increases the cost of the home charger. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a power system for an electric locomotive, which has two charging connectors for connecting two charging devices respectively.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a power system for an electric locomotive, comprising a first charging connector, a second charging connector, a rechargeable battery, a communication module, a diode, a battery management module and a battery start-stop control module.

[0007] The first charging connector is used to connect to a first connector of a first charging device; the first charging connector has a first charging power input port, a first power input port and a first communication port; when the first charging connector is connected to the first charging device, the first charging power input port can output a first charging power from the first charging device, and the first charging power has a first current;

[0008] The second charging connector is used to connect to a second connector of a second charging device; the second charging connector has a second charging power input port and a second power input port; when the second charging connector is connected to the second charging device, the second charging power input port can output a second charging power from the second charging device, the second charging power has a second current, and the second current is less than the first current;

[0009] The communication module is electrically connected to the first power input port and the first communication port, and the communication module communicates with the first charging device through the first communication port;

[0010] The diode has an anode and a cathode, the anode is electrically connected to a positive end of the first power input port, and the cathode is electrically connected to a positive end of the second power input port;

[0011] The battery management module has a first connection port, a second connection port, a second communication port and a conductive control port; the first connection port is electrically connected to the first charging power input port and the second charging power input port; the second connection port is electrically connected to the rechargeable battery; the second communication port is electrically connected to the communication module, and the battery management module communicates with the first charging device through the communication module; when the conductive control port receives a trigger, the first connection port and the second connection port are connected, and after the trigger is released, the first connection port and the second connection port are disconnected;

[0012] The battery start-stop control module is electrically connected to the conductive control port, the second power input port, and is electrically connected to the first power input port through the diode; when any one of the first power input port and the second power input port outputs a predetermined power from the first charging device or the second charging device, the battery start-stop control module generates the trigger to the conductive control port, and the first charging power output from the first charging power input port or the second charging power output from the second charging power input port is supplied to the rechargeable battery for charging via the battery management module;

[0013] When the first power input port outputs the predetermined power, the diode is forward-conducted, so that the predetermined power is output to the battery start and stop control module; when the second power input port outputs the predetermined power, the diode is reverse-cutoff, and the predetermined power is blocked by the diode and not output to the first power input port and the communication module.

[0014] The effect of the present invention is that by providing a first charging connector and a second charging connector, the user can choose to use the first charging device or the second charging device to charge the rechargeable battery. And when the second charging device is used, the communication module will not be affected. The second current is smaller than the first current, so that the second connector and the second charging connector can be made of lower-cost materials to reduce the cost of the second charging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the power system of the electric locomotive according to the first preferred embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the power system of an electric locomotive according to the second preferred embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the present invention, preferred embodiments are described in detail below with reference to the accompanying drawings. Figure 1 As shown, the power system 1 of the electric locomotive according to the first preferred embodiment of the present invention comprises a first charging connector 10, a second charging connector 12, at least one rechargeable battery 14, a communication module 16, a diode 18, a battery management module 20 and a battery start-stop control module 22. The power system 1 is used to supply power to a control device 100, and the control device 100 comprises a motor drive unit 100a and an electronic control unit 100b. The motor drive unit 100a is used to control the operation of the power motor 100c of the electric locomotive, and the electronic control unit 100b is used to control a plurality of low-load power receiving components 100d, and the low-load power receiving components 100d can be, for example, displays, turn signals, headlights, brake lights, etc.

[0018] The first charging connector 10 is a fast charging connector. The first charging connector 10 is used by the user to connect a first charging device 200. The first charging device 200 is a fast charging device, such as a charging pile. A first connector 200a (such as a charging gun) of the first charging device 200 can be connected to the first charging connector 10. The first charging connector 10 has a first charging power input port 102, a first power input port 104 and a first communication port 106. When the first charging connector 10 is connected to the first charging device 200, the first charging device 200 can output a first charging power to the first charging power input port 102, so that the first charging power input port 102 outputs the first charging power. The first charging power has a first voltage and a first current. In this embodiment, the first voltage is 75V and the first current is 60A. In addition, the first charging device 200 can output a predetermined power to the first power input port 104, so that the first power input port 104 outputs the predetermined power. In this embodiment, the predetermined power has a voltage, and the voltage is 12V for example and is less than the first voltage of the first charging power.

[0019] The second charging connector 12 is a general charging connector. The second charging connector 12 is used by the user to connect a second charging device 300. The second charging device 300 is, for example, a home charger. A second connector 300a of the second charging device 300 can be connected to the second charging connector 12. The second charging connector 12 has a second charging power input port 122 and a second power input port 124. When the second charging connector 12 is connected to the second charging device 300, the second charging device 300 can output a second charging power to the second charging power input port 122, so that the second charging power input port 122 outputs the second charging power. The second charging power has a second voltage and a second current. The second voltage is less than the first voltage and the voltage of the predetermined power, and the second current is less than the first current. In this embodiment, the second voltage is 73V and the second current is 4A. In other embodiments, the second voltage can also be equal to the first voltage. In addition, the second charging device 300 can output the predetermined power to the second power input port 124, so that the second power input port 124 outputs the predetermined power.

[0020] The rechargeable battery 14 in this embodiment is a 66V rechargeable battery as an example. In other embodiments, there may be a plurality of rechargeable batteries 14 .

[0021] The communication module 16 is electrically connected to the first power input port 104 and the first communication port 106. The communication module 16 communicates with the first charging device 200 through the first communication port 106. When the communication module 16 establishes communication with the first charging device 200, the first charging device 200 outputs the predetermined power to the first power input port 104 of the first charging connector 10, so that the first power input port 104 outputs the predetermined power. The communication module 16 may be an electric vehicle charging communication controller (EVCC, EV Communication Controller). After receiving the predetermined power, the communication module 16 performs a leakage detection procedure. When leakage is detected, the communication module 16 sends an abnormal message to the first charging device 200, and the first charging device 200 displays an abnormal state from a display (not shown), and the first charging device 200 stops outputting the predetermined power; when the communication module 16 sends a normal message to the first charging device 200, the first charging device 200 outputs the first charging power.

[0022] The anode of the diode 18 is electrically connected to a positive terminal of the first power input port 104 , and the cathode of the diode 18 is electrically connected to a positive terminal of the second power input port 124 .

[0023] The battery management module 20 has a first connection port 202, a second connection port 204, a second communication port 206 and a connection control port 208. The battery management module 20 is used to manage the charging and discharging of the rechargeable battery 14 and detect the status of the rechargeable battery 14, such as power, voltage, current, temperature, etc. The first connection port 202 is electrically connected to the first charging power input port 102 and the second charging power input port 122. The second connection port 204 is electrically connected to the rechargeable battery 14. The second communication port 206 is electrically connected to the communication module 16, and the battery management module 20 communicates with the first charging device 200 through the communication module 16 to transmit the status of the battery management module 20 and the status of the rechargeable battery 14 to the first charging device 200. When the connection control port 208 receives a trigger, the first connection port 202 and the second connection port 204 are connected, and when the trigger is released, the first connection port 202 and the second connection port 204 are disconnected. In this embodiment, the trigger is a short circuit, but it is not limited to this, and the change of potential can also be used as a trigger. In this embodiment, when the communication module 16 receives the predetermined power but cannot establish communication with the first charging device, it sends an abnormal message to the second communication port 206, and the battery management module 20 cuts off the connection between the first connection port 202 and the second connection port 204. The battery management module 20 can also be electrically connected to the control device 100 to transmit the status of the rechargeable battery 14 to the control device 100.

[0024] The battery start-stop control module 22 is electrically connected to the conductive control port 208, the second power input port 124, and is electrically connected to the first power input port 104 through the diode 18. When any one of the first power input port 104 and the second power input port 124 outputs a predetermined power, the battery start-stop control module 22 generates the trigger to the conductive control port 208 accordingly, and the first charging power output by the first charging power input port 102 or the second charging power output by the second charging power input port 122 is supplied to the rechargeable battery 14 via the battery management module 20 for charging. Among them, when the first power input port 104 outputs the predetermined power, the diode 18 is forward-conducted, so that the predetermined power output by the first power input port 104 is output to the battery start and stop control module 22, and the battery start and stop control module 22 generates the trigger to the connection control port 208 accordingly, and the first connection port 202 and the second connection port 204 of the battery management module 20 are connected, and the first charging power output by the first charging power input port 102 is supplied to the rechargeable battery 14 for charging. When the second power input port 124 outputs the predetermined power, the predetermined power output by the second power input port 124 is output to the battery start-stop control module 22, and the battery start-stop control module 22 generates the trigger to the connection control port 208 accordingly, and the first connection port 202 and the second connection port 204 of the battery management module 20 are connected, and the second charging device outputs the second charging power to charge the rechargeable battery 14; at the same time, the diode 18 is reversely cut off, and the predetermined power is blocked by the diode 18 and is not output to the first power input port 104 and the communication module 16, thereby avoiding affecting the operation of the communication module 16, for example, it can avoid the communication module from misjudging that the first charging device 200 has been connected to the first charging connector 10 but cannot communicate with the first charging device 200, and abnormality occurs and charging cannot be performed.

[0025] In this embodiment, the battery start-stop control module 22 is a battery start-stop relay 24, and the battery start-stop relay 24 has a control port 242 and two pins 244. The control port 242 is electrically connected to the cathode of the diode 18 and the second power input port 124, and the two pins 244 are electrically connected to the conductive control port 208. The two pins 244 are in a normally open state. When the control port 242 of the battery start-stop relay 24 receives the predetermined power, the two pins 244 are connected to form the trigger. After the predetermined power is released, the two pins 244 return to a normally open state. In other embodiments, the battery start-stop control module 22 can also be an electronic switch, such as a transistor or a solid-state relay, which can also generate a trigger.

[0026] The power system 1 of this embodiment may further include a motor power control module 26, which is used to control whether power is output to the motor drive unit 100a of the control device 100. The motor power control module 26 has a control port 26a, an input port 26b and an output port 26c. The control port 26a is electrically connected to the second power input port 124 and is electrically connected to the first power input port 104 through the diode 18. The input port 26b is electrically connected to the first connection port 202 of the battery management module 20, and the output port 26c is electrically connected to the motor drive unit 100a. When either the first power input port 104 or the second power input port 124 outputs the predetermined power, the control port 26a receives the predetermined power, and the motor power control module 26 blocks the electrical connection between the input port 26b and the output port 26c, so that the first charging power or the second charging power is not supplied to the motor drive unit 100a. This prevents the motor drive unit 100a from consuming too much power to affect charging and from erroneously controlling the operation of the power motor to cause danger.

[0027] In this embodiment, the motor power control module 26 includes a first relay 28 and a second relay 30. The first relay 28 has a first control port 282, a first input port 284 and a first output port 286. The first control port 282 has a first control pin 282a and a second control pin 282b. The first control pin 282a is electrically connected to a positive end of the first connection port 202 of the battery management module 20. In this embodiment, at least one overload protection element can be selectively provided between the first control pin 282a and the positive end of the first connection port 202. The positive end of the first connection port 202 is electrically connected to the first control pin 282a and the electronic control unit 100b through the overload protection element. In this embodiment, there are two overload protection elements, which are a circuit breaker 32 and a fuse. The first input port 284 constitutes the input port 26b, and the first output port 286 constitutes the output port 26c. The second relay 30 has a second control port 302, a first pin 304 and a second pin 306. The second control port 302 constitutes the control port 26a. The first pin 304 is electrically connected to the second control pin 282b of the first relay 28. The second pin 306 is electrically connected to a negative terminal of the first connection port 202 of the battery management module 20. When the second control port 302 receives the predetermined power, the first pin 304 and the second pin 306 are open-circuited, so that the first control port cannot receive the first charging power or the second charging power and cannot be excited, and the first input port 284 and the first output port 286 are open-circuited. In this way, the purpose of not supplying power to the motor drive unit 100a during charging is achieved. However, the first charging power or the second charging power can still be supplied to the electric control unit 100b to control the low-load power receiving component, for example, the status of the rechargeable battery 14 is displayed on the display as charging and the current power.

[0028] When the first charging device 200 is not connected to the first charging connector 10, or the second charging device 300 is not connected to the second charging connector 12, the second control port 302 does not receive the predetermined power, and the first pin 304 and the second pin 306 are in a normally closed state. The second relay 30 also has a third pin 308, and the third pin 308 and the second pin 306 are in a normally open state.

[0029] In order to increase the safety of using the second charging device 300, in this embodiment, the second charging connector 12 also has a start pin 126, and the start pin 126 is electrically connected to the third pin 308. The second charging device 300 detects the state of the start pin 126 to determine whether the second charging power can be output. When the second control port 302 receives the predetermined power, the second pin 306 and the third pin 308 are connected, so that the start pin 126 is connected to the negative end of the second charging power input port 122, that is, connected to the negative end of the first connection port 202 of the battery management module 20. When the second charging device 300 detects that the start pin 126 is connected to the negative end of the second charging power input port 122, it means that the second charging device 300 has been safely connected, and then the second charging power is output to charge the rechargeable battery 14.

[0030] The power system 1 of this embodiment may further include a start switch, which can be turned on by key start or wireless start. The start switch 36 is electrically connected to the connection control port 208 of the battery management module 20 and is connected in parallel with the two pins of the battery start and stop relay 24. When the first charging device 200 is not connected to the first charging connector 10 and the second charging device 300 is not connected to the second charging connector 12, the start switch 36 is activated to short-circuit and form the trigger, so that the power of the rechargeable battery 14 is output through the first connection port 202 of the battery management module 20, and the power of the rechargeable battery output from the first connection port 202 is transmitted to the first control port 282 of the first relay 28, so that the first input port 284 and the first output port 286 are short-circuited. Therefore, the power of the rechargeable battery 14 can be output to the motor drive unit through the first relay 28 to provide power for the motor drive unit 100a to operate. The power of the rechargeable battery 14 is also supplied to the electronic control unit 100b for controlling the low-load power receiving component.

[0031] Figure 2 The figure shows the electric power system 2 of the electric locomotive according to the second preferred embodiment of the present invention, which has a substantially similar structure to the first embodiment, except that the first input port 284 of the first relay 28 is electrically connected to the first connection port 202 of the battery management module 20 through at least one overload protection element (circuit breaker 32 and / or fuse 34). Thus, the motor drive unit 100a can be provided with overload protection.

[0032] As described above, the power system of the present invention provides two different charging connectors, allowing the user to choose to use the first charging device 200 or the second charging device 300 to charge the rechargeable battery 14, and when the second charging device 300 is used for charging, the reverse cutoff function of the diode 18 can prevent the predetermined voltage output by the second power input port 124 from affecting the communication module 16. It is worth mentioning that since the second current flowing through the second connector 300a of the second charging device 300 is smaller, the electrical property requirements of the material of the second connector 300a are lower than those of the first connector 200a, thereby reducing the cost of the second charging device 300. Since the second charging device 300 does not need to communicate with the communication module, the cost of the second charging device 300 can also be reduced.

[0033] The above description is only a preferred embodiment of the present invention. Any equivalent changes made by applying the present specification and the scope of the patent application should be included in the patent scope of the present invention.

[0034] Description of Reference Numerals

[0035] [The present invention]

[0036] 1, 2: Power system

[0037] 10: First charging connector

[0038] 102: First charging power input port

[0039] 104: First power input port

[0040] 106: First communication port

[0041] 12: Second charging connector

[0042] 122: Second charging power input port

[0043] 124: Second power input port

[0044] 126: Start pin

[0045] 14: Rechargeable battery

[0046] 16: Communication module

[0047] 18: Diode

[0048] 20: Battery management module

[0049] 202: First connection port

[0050] 204: Second connection port

[0051] 206: Second communication port

[0052] 208: Connection control port

[0053] 22: Battery start and stop control module

[0054] 24: Battery start and stop relay

[0055] 242: Control port

[0056] 244: Pin

[0057] 26: Motor power control module

[0058] 26a: Control port

[0059] 26b: Input port

[0060] 26c: Output port

[0061] 28: First relay

[0062] 282: First control port

[0063] 282a: First control pin

[0064] 282b: Second control pin

[0065] 284: First input port

[0066] 286: First output port

[0067] 30: Second relay

[0068] 302: Second control port

[0069] 304: First pin

[0070] 306: Second pin

[0071] 308: Third pin

[0072] 32: Circuit Breaker

[0073] 34: Fuse

[0074] 36: Start switch

[0075] 100: Control device

[0076] 100a: Motor drive unit

[0077] 100b: Electronic control unit

[0078] 100c: Power motor

[0079] 100d: Power receiving component

[0080] 200: First charging device

[0081] 200a: First joint

[0082] 300: Second charging device

[0083] 300a: Second connector

Claims

1. An electric power system for an electric locomotive, comprising: a first charging connector, used to connect to a first connector of a first charging device; the first charging connector has a first charging power input port, a first power input port and a first communication port; when the first charging connector is connected to the first charging device, the first charging power input port can output a first charging power from the first charging device, and the first charging power has a first current; a second charging connector, used to connect to a second connector of a second charging device; the second charging connector has a second charging power input port and a second power input port; when the second charging connector is connected to the second charging device, the second charging power input port can output a second charging power from the second charging device, the second charging power has a second current, and the second current is less than the first current; A rechargeable battery; a communication module electrically connected to the first power input port and the first communication port, wherein the communication module communicates with the first charging device through the first communication port; a diode having an anode and a cathode, wherein the anode is electrically connected to a positive end of the first power input port, and the cathode is electrically connected to a positive end of the second power input port; a battery management module having a first connection port, a second connection port, a second communication port and a conductive control port; the first connection port is electrically connected to the first charging power input port and the second charging power input port; the second connection port is electrically connected to the rechargeable battery; the second communication port is electrically connected to the communication module, and the battery management module communicates with the first charging device through the communication module; When the connection control port receives a trigger, the first connection port and the second connection port are connected, and when the trigger is released, the first connection port and the second connection port are disconnected; a battery start-stop control module, electrically connected to the conduction control port, the second power input port, and electrically connected to the first power input port through the diode; When any one of the first power input port and the second power input port outputs a predetermined power from the first charging device or the second charging device, the battery start-stop control module generates the trigger to the connection control port, and the first charging power output from the first charging power input port or the second charging power output from the second charging power input port is supplied to the rechargeable battery for charging via the battery management module; Wherein, when the first power input port outputs the predetermined power, the diode is forward-conducted, so that the predetermined power is output to the battery start-stop control module; When the second power input port outputs the predetermined power, the diode is reversely cut off, and the predetermined power is blocked by the diode and is not output to the first power input port and the communication module.

2. The electric power system of an electric locomotive according to claim 1, wherein: A motor power control module is included, the motor power control module has a control port, an input port and an output port; the control port is electrically connected to the second power input port and is electrically connected to the first power input port through the diode; The input port is electrically connected to the first connection port of the battery management module; The output port is electrically connected to a motor drive unit; When any one of the first power input port and the second power input port outputs the predetermined power, the control port receives the predetermined power, and the motor power control module blocks the electrical connection between the input port and the output port.

3. The electric power system of an electric locomotive according to claim 2, wherein: The motor power control module includes a first relay and a second relay, the first relay has a first control port, a first input port and a first output port, the first control port has a first control pin and a second control pin, the first control pin is electrically connected to a positive end of the first connection port of the battery management module, the first input port constitutes the input port, and the first output port constitutes the output port; the second relay has a second control port, a first pin and a second pin, the second control port constitutes the control port, the first pin is electrically connected to the second control pin, and the second pin is electrically connected to a negative end of the first connection port of the battery management module; when the second control port receives the predetermined power, the first pin and the second pin are open, and the first input port and the first output port are open.

4. The electric power system of an electric locomotive according to claim 3, wherein: When the second control port does not receive the predetermined power, the first pin and the second pin are in a normally closed state.

5. The electric power system of an electric locomotive according to claim 4, wherein: It includes a start switch electrically connected to the conduction control port; when the first charging connector is not connected to the first charging device and the second charging connector is not connected to the second charging device, the start switch is turned on to form the trigger, so that the power of the rechargeable battery is output to the motor drive unit via the battery management module and the first relay.

6. The electric power system of an electric locomotive according to claim 4, wherein: The second charging connector has an activation pin, and the activation pin is used by the second charging device to detect whether the second charging power can be output; the second relay has a third pin, and the third pin is electrically connected to the activation pin; When the second control port receives the predetermined power, the second pin is connected to the third pin; when the second charging device detects that the start pin is connected to the negative end of the first connection port of the battery management module, the second charging power is output.

7. The electric power system of an electric locomotive according to claim 4, wherein: The first control pin is electrically connected to the positive terminal of the first connection port of the battery management module through at least one overload protection element.

8. The electric power system of an electric locomotive according to claim 7, wherein: The positive end of the first connection port of the battery management module is electrically connected to an electric control unit through the at least one overload protection element.

9. The electric power system of an electric locomotive according to claim 7, wherein: The first input port is electrically connected to the first connection port of the battery management module through the at least one overload protection element.

10. The electric power system of an electric locomotive according to claim 1, wherein: The battery start and stop control module includes a battery start and stop relay, which has a control port and two pins. The control port is electrically connected to the cathode of the diode and the second power input port, and the two pins are electrically connected to the conductive control port. When the control port receives the predetermined power, the two pins are turned on to form the trigger.

11. The electric power system of the electric locomotive as claimed in claim 10, comprising a start switch electrically connected to the two pins, wherein the trigger is formed when the start switch is turned on.

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