Charging control device and vehicle

Abstract

A charge control apparatus for a vehicle is provided. The device comprises a charging monitoring module which monitors whether a first AC charging port is electrically connected with an external power supply and generates a first monitoring signal, and monitors whether a second AC charging port is electrically connected with the external power supply and generates a second monitoring signal; the relay control module is coupled to the charging monitoring module and is used for controlling the first relay and the second relay based on the first monitoring signal and the second monitoring signal: when one of the first alternating current charging port and the second alternating current charging port is electrically connected with an external power supply, the first relay and the second relay are electrically connected; controlling the corresponding relay in the first relay and the second relay to be closed; and when both the first alternating current charging port and the second alternating current charging port are electrically connected with the external power supply or are not electrically connected with the external power supply, the first alternating current charging port and the second alternating current charging port are controlled to be kept in an off state. The invention allows one of the two AC charging ports to charge the vehicle battery and avoids potential risks caused by their simultaneous charging of the battery.

Description

Technical Field

[0001] The present invention generally relates to the field of new energy vehicles and more specifically to a charging control device and a vehicle. Background Art

[0002] As the world's energy and environmental protection situation becomes increasingly tense, batteries are becoming more and more popular as a power source for vehicles. At present, electric vehicles have two charging methods: AC charging and DC charging. An electric vehicle usually has only one AC charging port, located at the front or rear of the vehicle. However, in some special parking scenarios, the single AC charging port will make it impossible for users to charge the vehicle due to its location limitation, which brings great inconvenience to users. Summary of the invention

[0003] In view of the above technical problems, a first aspect of the present invention provides a charging control device for a vehicle. The vehicle includes a first AC charging port, a second AC charging port, a charging module, a first relay coupled between the first AC charging port and the charging module, and a second relay coupled between the second AC charging port and the charging module, wherein the charging control device includes:

[0004] a charging monitoring module, coupled to the first AC charging port and the second AC charging port, and configured to:

[0005] monitoring whether the first AC charging port is electrically connected to an external power source and generating a first monitoring signal; and

[0006] monitoring whether the second AC charging port is electrically connected to the external power source and generating a second monitoring signal; and

[0007] A relay control module is coupled to the charging monitoring module and is configured to control the first relay and the second relay as follows based on the first monitoring signal and the second monitoring signal:

[0008] When the first monitoring signal and the second monitoring signal indicate that one of the first AC charging port and the second AC charging port is electrically connected to the external power source, controlling the corresponding one of the first relay and the second relay to close, thereby allowing the external power source to charge the battery of the vehicle via the charging module; and

[0009] When the first monitoring signal and the second monitoring signal indicate that both the first AC charging port and the second AC charging port are electrically connected to the external power source or are not electrically connected to the external power source, the first relay and the second relay are controlled to remain in an off state.

[0010] According to the solution of the present invention, the user is allowed to charge the vehicle battery through one of the two AC charging ports located at two different positions on the vehicle, which is applicable to various parking scenarios, improves the convenience and selectivity of charging, and enhances the user experience. On the other hand, it avoids the potential danger caused by the user charging the battery through two AC charging ports at the same time, thereby improving safety. In addition, the solution of the present invention is implemented through hardware, has a simple circuit structure, does not need to modify the original software logic, is low-cost and easy to implement.

[0011] In some embodiments according to the present invention, the first monitoring signal and the second monitoring signal include a high level signal or a low level signal respectively, and the charging monitoring module is further configured as follows:

[0012] generating a first high level signal when the first AC charging port is electrically connected to the external power source, and generating a first low level signal when the first AC charging port is disconnected from the external power source; and

[0013] A second high level signal is generated when the second AC charging port is electrically connected to the external power source, and a second low level signal is generated when the second AC charging port is disconnected from the external power source.

[0014] In some embodiments according to the present invention, the relay control module includes:

[0015] a logic operation module, coupled to the charge monitoring module and configured to generate a first driving signal and a second driving signal based on the first monitoring signal and the second monitoring signal; and

[0016] A driving module is coupled to the logic operation module and is configured to generate a first control signal based on the first driving signal and to generate a second control signal based on the second driving signal, wherein the first control signal is used to control the first relay to be opened or closed, and the second control signal is used to control the second relay to be opened or closed.

[0017] In some embodiments according to the present invention, the logic operation module includes:

[0018] a first inverter, whose input terminal is coupled to the charging monitoring module and configured to perform an inversion operation on the first monitoring signal;

[0019] a second inverter, whose input terminal is coupled to the charging monitoring module and configured to perform an inversion operation on the second monitoring signal;

[0020] a first AND gate, whose input end is coupled to the charging monitoring module and the output end of the second inverter, and is configured to generate the first driving signal by performing an AND operation on the first monitoring signal and the inverted second monitoring signal; and

[0021] The second AND gate has an input end coupled to the charging monitoring module and an output end of the first inverter, and is configured to generate the second driving signal by performing an AND operation on the second monitoring signal and the inverted first monitoring signal.

[0022] In some embodiments according to the present invention, the driving module includes:

[0023] a first driving circuit coupled to the logic operation module and configured to generate a first control signal based on the first driving signal; and

[0024] The second driving circuit is coupled to the logic operation module and is configured to generate a second control signal based on the second driving signal.

[0025] In some embodiments according to the present invention, the charging monitoring module includes:

[0026] a first signal processing module coupled to the first AC charging port and configured to process an AC signal from the external power source to generate the first high level signal when the first AC charging port is electrically connected to the external power source; and

[0027] The second signal processing module is coupled to the second AC charging port and is configured to process an AC signal from the external power source to generate the second high level signal when the second AC charging port is electrically connected to the external power source.

[0028] In some embodiments according to the present invention, the first signal processing module includes:

[0029] a first filtering circuit coupled to the first AC charging port and configured to perform a first filtering process on an AC signal from an external power source when the first AC charging port is electrically connected to the external power source;

[0030] a first analog-to-digital conversion circuit, coupled to the first filtering circuit and configured to convert the filtered AC signal into a first DC signal;

[0031] a second filtering circuit, coupled to the first analog-to-digital conversion circuit and configured to perform a second filtering process on the first DC signal; and

[0032] The first voltage divider circuit is coupled to the second filtering circuit and is configured to divide the voltage of the filtered first DC signal to generate the first high level signal.

[0033] In some embodiments according to the present invention, the second signal processing module includes:

[0034] a third filtering circuit coupled to the second AC charging port and configured to perform a third filtering process on an AC signal from an external power source when the second AC charging port is electrically connected to the external power source;

[0035] a second analog-to-digital conversion circuit, coupled to the third filtering circuit and configured to convert the filtered AC signal into a second DC signal;

[0036] a fourth filtering circuit, coupled to the second analog-to-digital conversion circuit and configured to perform a fourth filtering process on the second DC signal; and

[0037] The second voltage divider circuit is coupled to the fourth filtering circuit and is configured to divide the voltage of the filtered second DC signal to generate the second high level signal.

[0038] In some embodiments according to the present invention, the first filtered DC signal is used to power the first relay, and the second filtered DC signal is used to power the second relay.

[0039] In some embodiments according to the present invention, the first DC signal and the second DC signal are 12V voltage signals.

[0040] In some embodiments according to the present invention, the charging monitoring module further includes:

[0041] A DC voltage conversion circuit is coupled to the second filtering circuit and the fourth filtering circuit and is configured to convert the filtered first DC signal and / or the filtered second DC signal into a third DC signal for powering the relay control module.

[0042] In some embodiments according to the present invention, the third DC signal is a 5V voltage signal.

[0043] A second aspect of the present invention provides a vehicle, comprising: a first AC charging port and a second AC charging port;

[0044] a charging module configured to charge a battery of the vehicle when the first AC charging port or the second AC charging port is electrically connected to an external power source;

[0045] a first relay coupled between the first AC charging port and the charging module and configured to control a power connection between the first AC charging port and the charging module;

[0046] a second relay coupled between the second AC charging port and the charging module and configured to control a power connection between the second AC charging port and the charging module; and

[0047] According to the charging control device in each embodiment of the above-mentioned first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The features, advantages and other aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Several embodiments of the present invention are shown herein in an illustrative and non-restrictive manner. In the accompanying drawings, the same figure numbers represent the same or similar parts.

[0049] Figure 1 A schematic diagram of a vehicle according to an embodiment of the present invention is shown;

[0050] Figure 2 A schematic diagram of a charging system according to an embodiment of the present invention is shown;

[0051] Figure 3 A schematic block diagram of a charging control device according to an embodiment of the present invention is shown;

[0052] Figure 4 A schematic block diagram of a charging monitoring module according to an embodiment of the present invention is shown;

[0053] Figure 5 Another schematic block diagram of a charging monitoring module according to an embodiment of the present invention is shown;

[0054] Figure 6 shows a schematic block diagram of a relay control module according to an embodiment of the present invention; and

[0055] Figure 7 A schematic circuit diagram of a relay control module according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the present invention more obvious, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the present invention.

[0057] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0058] The technologies, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and devices should be considered as part of the specification. The connection between the units or modules in the drawings is only for the convenience of explanation, which means that at least the units or modules at both ends of the connection are in communication with each other, and is not intended to limit the unconnected units from being unable to communicate.

[0059] Before introducing the embodiments of the present invention, some terms involved in the present invention are first explained to facilitate a better understanding of the present invention.

[0060] The terms "connected", "coupled" or "electrically connected" and similar terms used in the present invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A", "a group" or "an" and similar words do not indicate a quantity limitation, but indicate the presence of at least one.

[0061] The terms "include", "comprising" and similar terms used in the present invention should be understood as open terms, that is, "including / includes but not limited to", indicating that other contents may also be included. The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment" and so on. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] In an embodiment of the present invention, the term “based on” means “based at least in part on”.

[0063] In the embodiments of the present invention, the term "one embodiment" means "at least one embodiment".

[0064] In the embodiments of the present invention, the term "another embodiment" means "at least one additional embodiment" and the like.

[0065] In the embodiments of the present invention, the term "vehicle" may be a car, a truck, an SUV, a van, a bus, or any other rolling platform. The vehicle may be a pure electric vehicle or a hybrid vehicle.

[0066] In the embodiments of the present invention, the term "battery" may include a single battery, a battery module consisting of multiple batteries, or a battery pack.

[0067] In order to fully understand the present invention, a detailed structure will be proposed in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail as follows, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0068] Currently, an electric vehicle usually has only one AC charging port, located at the front or rear of the vehicle. However, in some special parking scenarios, the single AC charging port will make it impossible for users to charge the vehicle due to its location limitation, which brings great inconvenience to users.

[0069] To this end, the present invention proposes a charging control device for a vehicle having two AC charging ports. In the solution of the present invention, a user is allowed to charge the vehicle battery through one of two AC charging ports located at two different positions on the vehicle, which is suitable for various parking scenarios, improves the convenience and selectivity of charging, and increases the user experience. On the other hand, the potential danger caused by the user charging the battery through two AC charging ports at the same time is avoided, thereby improving safety. In addition, the solution of the present invention is implemented through hardware, with a simple circuit structure, without the need to modify the original software logic, and is low-cost and easy to implement. The content of the present invention is explained below based on several embodiments.

[0070] First reference Figure 1 and Figure 2 . Figure 1 shows a schematic diagram of a vehicle according to an embodiment of the present invention, Figure 2 Schematic diagram of a charging system according to an embodiment of the present invention is shown. Figure 1 and Figure 2The vehicle 100 is a pure electric vehicle or a hybrid vehicle, which is equipped with a charging system 200. The charging system 200 includes two AC charging ports 21 and 22, a charging control device 31 coupled to the two AC charging ports 21 and 22, and a charging module 41 coupled to the charging control device 31 via two relays 51 and 52.

[0071] In this embodiment, the two AC charging ports may be respectively provided at the front side 101 and the rear side 102 of the vehicle 100. For example, the first AC charging port 21 is provided at the front side 101 of the vehicle 100, and the second charging port 22 is provided at the rear side 102 of the vehicle 100. In other embodiments, the first AC charging port 21 and the second AC charging port 22 may be provided at other locations of the vehicle 100. For example, the first AC charging port 21 is provided at the left front side of the vehicle 100 (such as above the left front wheel), and the second AC charging port 22 is provided at the rear side 102 of the vehicle 100. In this embodiment, a spiral cable electrically connected to the first AC charging port 21 is provided at the front side 101 of the vehicle 100. When the user needs to charge the vehicle through the first AC charging port 21, it can be connected to an external power source (such as a charging facility such as a charging pile) through the spiral cable.

[0072] The charging module 41 is installed in the vehicle 100, which can be an all-in-one module including a power distribution unit (PDU), an electric charger (OBC) and a DC / DC converter. The charging control device 31 can be installed on the front side 101 of the vehicle 100, for example. The first AC charging port 21 is coupled to the charging module 41 via a first relay 51, which is used to control the power connection between the first AC charging port 21 and the charging module 41. The second AC charging port 22 is coupled to the charging module 41 via a second relay 52, which is used to control the power connection between the second AC charging port 22 and the charging module 41. In this embodiment, the first relay 51 and the second relay 52 are arranged between the charging control device 31 and the charging module 41. In other embodiments, the first relay 51 and the second relay 61 may also be arranged at other positions.

[0073] The user can charge the battery of the vehicle 100 through the first AC charging port 21 or the second AC charging port 22. However, in some cases, the user may connect both AC charging ports to the external power supply due to improper operation or misoperation, which may cause safety problems. Therefore, in this embodiment, the charging control device 31 monitors the electrical connection between the first AC charging port 21 and the second AC charging port 22 and the external power supply. When it is detected that one of the first AC charging port 21 and the second AC charging port 22 is electrically connected to the external power supply, the charging control device 31 controls the corresponding relays of the first relay 51 and the second relay 52 to close, so that the external power supply charges the battery of the vehicle 100 via the charging module 41. When it is detected that both the first AC charging port 21 and the second AC charging port 22 are electrically connected to the external power supply, the charging control device 31 controls the first relay 51 and the second relay 52 to remain in the disconnected state, and the charging system 200 enters the protection mode. The battery of the vehicle 100 cannot be charged through any AC charging port, so that the potential danger caused by the user charging the battery through the two AC charging ports at the same time can be avoided, thereby improving safety.

[0074] In some embodiments, when both the first AC charging port 21 and the second AC charging port 22 are electrically connected to an external power source, the vehicle controller (VCU) of the vehicle 100 can detect this state and issue a warning to the user through a human-computer interaction interface (such as a central control display, a dashboard and / or a speaker) to remind the user that the charging system 200 has entered a protection mode and cannot be charged.

[0075] Reference now Figure 3 , Figure 3 FIG. 2 shows a schematic block diagram of a charging control device according to an embodiment of the present invention. Figure 3As shown in FIG. 1 , the charging control device 31 includes a charging monitoring module 32 and a relay control module 33. The charging monitoring module 32 is coupled to the first AC charging port 21 and the second AC charging port 22. The charging monitoring module 32 is used to monitor whether the first AC charging port 21 is electrically connected to an external power source and generate a first monitoring signal, and monitor whether the second AC charging port 22 is electrically connected to an external power source and generate a second monitoring signal. The relay control module 33 is coupled to the charging monitoring module 32 and receives the first detection signal and the second monitoring signal from the charging monitoring module 32. The relay control module 33 is used to control the first relay 51 and the second relay 52 as follows based on the first monitoring signal and the second monitoring signal: when the first monitoring signal and the second monitoring signal indicate that one of the first AC charging port 21 and the second AC charging port 22 is electrically connected to the external power supply, the corresponding relays of the first relay 21 and the second relay 22 are controlled to be closed, so that the external power supply charges the battery of the vehicle 100 via the charging module 41; when the first monitoring signal and the second monitoring signal indicate that both the first AC charging port 21 and the second AC charging port 22 are electrically connected to the external power supply or are not electrically connected to the external power supply, the first relay 51 and the second relay 52 are controlled to remain in the disconnected state.

[0076] In some embodiments, the first monitoring signal and the second monitoring signal may include a high level signal or a low level signal, respectively. The charging monitoring module 32 may generate a first high level signal when the first AC charging port 21 is electrically connected to the external power supply, and generate a first low level signal when the first AC charging port 21 is disconnected from the external power supply. In addition, the charging monitoring module 32 may also generate a second high level signal when the second AC charging port 22 is electrically connected to the external power supply, and generate a second low level signal when the second AC charging port 22 is disconnected from the external power supply.

[0077] In some embodiments, the relay control module 33 may include a logic operation module and a drive module. The logic operation module is coupled to the charging monitoring module 32 and is used to generate a first drive signal and a second drive signal based on the first monitoring signal and the second monitoring signal. The drive module is coupled to the logic operation module and is used to generate a first control signal based on the first drive signal and a second control signal based on the second drive signal. The first control signal is used to control the first relay to open or close, and the second control signal is used to control the second relay to open or close.

[0078] In some embodiments, the charging monitoring module 32 may include a first signal processing module and a second signal processing module. The first signal processing module is coupled to the first AC charging port 21, and is used to process the AC signal from the external power supply when the first AC charging port 21 is electrically connected to the external power supply to generate a first high-level signal. The second signal processing module is coupled to the second AC charging port 22, and is used to process the AC signal from the external power supply when the second AC charging port 22 is electrically connected to the external power supply to generate a second high-level signal.

[0079] In some embodiments, the first signal processing module can filter, perform analog-to-digital conversion, and other processing on the AC signal from the external power supply when the first AC charging port is electrically connected to the external power supply, and the processed DC signal (e.g., 12V voltage signal) can be used to power the first relay 51. The second signal processing module can filter, perform analog-to-digital conversion, and other processing on the AC signal from the external power supply when the second AC charging port is electrically connected to the external power supply, and the processed DC signal (e.g., 12V voltage signal) can be used to power the second relay 52. ​​In these embodiments, there is no need to use the battery (12V battery) of the vehicle 100 as the power source of the relay, so the battery power will not be consumed, avoiding the vehicle battery being exhausted and causing the vehicle to be unable to start, while extending the battery life.

[0080] In some embodiments, the charging monitoring module 32 may further include a DC voltage conversion circuit, which is coupled to the first signal processing module and the second signal processing module, and performs a DC voltage conversion on the processed DC signal, and the converted DC signal (e.g., a 5V voltage signal) is used to power the relay control module 33. In these embodiments, it is not necessary to perform a DC voltage conversion on the battery (12V battery) of the vehicle 100 as the power source of the relay control module 33, so the battery power will not be consumed, and the battery of the vehicle is prevented from being exhausted and causing the vehicle to be unable to start, while extending the battery life.

[0081] Reference below Figure 4 A specific embodiment of a charging monitoring module is described. Figure 4 FIG. 2 shows a schematic block diagram of a charging monitoring module according to an embodiment of the present invention. Figure 4 In the embodiment of the present invention, the charging monitoring module 32 includes a first signal processing module 321 and a second signal processing module 322, and the first monitoring signal and the second monitoring signal generated by the charging monitoring module 32 include a high level signal and a low level signal respectively. The charging monitoring module 32 provides the first monitoring signal and the second monitoring signal to the relay control module 33 to control the opening and closing of the first relay 51 and the second relay 52.

[0082] like Figure 4As shown in , the first signal processing module 321 includes a first filtering circuit 3210, a first analog-to-digital conversion circuit (ADC) 3211, a second filtering circuit 3212 and a first voltage divider circuit 3213. The first filtering circuit 3210 may, for example, include an EMS protector and an EMI filter, and the second filtering circuit 3212 may, for example, include an RLC filter. The first voltage divider circuit 3213 may, for example, include two or more voltage divider resistors. The first filtering circuit 3210 is coupled to the first AC charging port 21, and the first filtering circuit 3210, the first analog-to-digital conversion circuit 3211, the second filtering circuit 3212 and the first voltage divider circuit 3213 are coupled in sequence. It should be noted that Figure 4 The order of the circuit modules of the first signal processing module 321 shown in FIG. 3 is only an example, and they may be arranged in other orders.

[0083] When the user electrically connects the first AC charging port 21 to an external power source, the first filter circuit 3210 performs a first filtering process on the AC signal (e.g., a 220V AC signal) from the external power source. The first analog-to-digital conversion circuit 3211 receives the filtered AC signal and converts the filtered AC signal into a first DC signal. The second filter circuit 3212 receives the first DC signal and performs a second filtering process on the first DC signal. The filtered first DC signal is divided by the first voltage divider circuit 3213 to generate a first high-level signal. When the first AC charging port 21 is not electrically connected to an external power source, the first voltage divider circuit 3213 outputs a low-level signal.

[0084] The second signal processing module 322 includes a third filter circuit 3220, a second analog-to-digital conversion circuit (ADC) 3221, a fourth filter circuit 3222, and a second voltage divider circuit 3223. The third filter circuit 3220 may, for example, include an EMS protector and an EMI filter, and the fourth filter circuit 3222 may, for example, include an RLC filter. The second voltage divider circuit 3223 may, for example, include two or more voltage divider resistors. The third filter circuit 3220 is coupled to the second AC charging port 22, and the third filter circuit 3220, the second analog-to-digital conversion circuit 3221, the fourth filter circuit 3222, and the second voltage divider circuit 3223 are coupled in sequence. It should be noted that Figure 4 The order of the circuit modules of the second signal processing module 322 shown in FIG. 3 is only an example, and they may be arranged in other orders.

[0085] When the user electrically connects the second AC charging port 22 to an external power supply, the third filter circuit 3220 performs a third filter process on the AC signal (e.g., a 220V AC signal) from the external power supply. The second analog-to-digital conversion circuit 3221 receives the filtered AC signal and converts the filtered AC signal into a second DC signal. The fourth filter circuit 3222 receives the second DC signal and performs a fourth filter process on the first DC signal. The filtered second DC signal is divided by the second voltage divider circuit 3223 to generate a second high-level signal. When the second AC charging port 22 is not electrically connected to an external power supply, the second voltage divider circuit 3223 outputs a low-level signal.

[0086] exist Figure 4 In the embodiment of the present invention, the charging monitoring module 321 includes two signal processing modules, each of which includes two filter circuits, an analog-to-digital conversion circuit and a voltage divider circuit. However, in other embodiments, each signal processing module may also include other numbers or types of signal processing circuits.

[0087] Reference below Figure 5 Another specific embodiment of the charging monitoring module is described. Figure 5 Another schematic block diagram of a charging monitoring module according to an embodiment of the present invention is shown. Figure 5 In the embodiment of the present invention, in addition to the first signal processing module 321 and the second signal processing module 322, the charging monitoring module 32 further includes a DC voltage conversion circuit 323. The DC voltage conversion circuit 323 is coupled to the second filter circuit 3212 and the fourth filter circuit 3222. Figure 5 The functions of the circuit modules of the first signal processing module 321 and the second signal processing module 322 are similar to those of the circuit modules of Figure 4 The same as in, no further description is given here.

[0088] exist Figure 5 In the embodiment, when the user electrically connects the first AC charging port 21 to an external power source, the DC voltage conversion circuit 323 performs DC voltage conversion (for example, 12V to 5V) on the first DC signal filtered by the second filter circuit 3212 and / or the second DC signal filtered by the fourth filter circuit 3222 to obtain a third DC signal for powering the relay control module 33. In addition, the filtered first DC signal is used to power the first relay 51, and the filtered second DC signal is used to power the second relay 52.

[0089] In this embodiment, there is no need to convert the battery (12V battery) of the vehicle 100 into a DC voltage and use it as the power source of the relay control module 33, so the battery power will not be consumed, thus avoiding the vehicle battery being exhausted and causing the vehicle to be unable to start, and at the same time extending the battery life.

[0090] Next reference Figure 6 , Figure 6 FIG. 1 shows a schematic block diagram of a relay control module according to an embodiment of the present invention. Figure 6 In the embodiment of the present invention, the relay control module 33 includes a logic operation module 331 and a drive module 332. The logic operation module 331 is coupled to the charging monitoring module 32, receives the first monitoring signal and the second monitoring signal, and generates the first drive signal and the second drive signal based on the first monitoring signal and the second monitoring signal. The drive module 332 is coupled to the logic operation module 331, receives the first drive signal and the second drive signal, generates a first control signal based on the first drive signal, thereby controlling the first relay 51 to be opened or closed, and generates a second control signal based on the second drive signal, thereby controlling the second relay 52 to be opened or closed.

[0091] Reference below Figure 7 A specific embodiment of a relay control module is described. Figure 7 FIG. 2 shows a schematic circuit diagram of a relay control module according to an embodiment of the present invention. Figure 7 As shown, the logic operation module 331 includes a first inverter 3311, a second inverter 3312, a first AND gate 3313 and a second AND gate 3314. The driving module 332 includes a first driving circuit 3321 and a second driving circuit 3322. The first driving circuit 3321 can be, for example, a low-side driving circuit of the first relay 51, and the second driving circuit 3322 can be, for example, a low-side driving circuit of the second relay 52. ​​In this embodiment, the charging monitoring module 32 (for example Figure 5 In the embodiment of the present invention, power is supplied (for example, 5V) to the first inverter 3311, the second inverter 3312, the first AND gate 3313, and the second AND gate 3314. In other embodiments, the battery of the vehicle 100 may be converted into a voltage and then used to supply power to the logic circuit, so that the logic circuit can work more stably.

[0092] The input end of the first inverter 3311 is connected to the charging monitoring module 32, receives the first monitoring signal and performs an inversion operation on the first monitoring signal, and the inverted first monitoring signal is used as an input of the second AND gate 3314. The input end of the second inverter 3312 is connected to the charging monitoring module 32, receives the second monitoring signal and performs an inversion operation on the second monitoring signal, and the inverted second monitoring signal is used as an input of the first AND gate 3313. The input end of the first AND gate 3313 is also connected to the charging monitoring module 32, receives the first monitoring signal as another input, and its output end is connected to the first drive circuit 3321. The first AND gate 3313 performs an AND operation on the first monitoring signal and the inverted second monitoring signal, and the result is provided to the first drive circuit 3321 as a first drive signal. The first drive circuit 3321 generates a first control signal based on the first drive signal, thereby controlling the first relay 51 to open or close. Specifically, when the first drive signal is at a high level, the switch in the first drive circuit 3321 is closed, so that the coil of the first relay 51 is electrically connected to the power supply, current flows through the coil, and the moving contact and the static contact of the first relay 51 are closed; when the first drive signal is at a low level, the switch of the first drive circuit 3321 remains in an open state, no current flows through the coil of the first relay 51, and the moving contact and the static contact of the first relay 51 remain open. The input end of the second AND gate 3314 is also connected to the charging monitoring module 32, receives the second monitoring signal as another input, and its input end is connected to the second drive circuit 3322. The second AND gate 3314 performs an AND operation on the second monitoring signal and the inverted first monitoring signal, and the result is provided to the second drive circuit 3322 as the second drive signal. The second drive circuit 3322 generates a second control signal based on the second drive signal, thereby controlling the second relay 52 to open or close. Specifically, when the second drive signal is at a high level, the switch in the second drive circuit 3322 is closed, so that the coil of the second relay 52 is electrically connected to the power supply, current flows through the coil, and the moving contact and the static contact of the second relay 52 are closed; when the second drive signal is at a low level, the switch of the second drive circuit 3322 remains in the disconnected state, no current flows through the coil of the second relay 52, and the moving contact and the static contact of the second relay 52 remain disconnected.

[0093] Table 1 shows the relationship between the first monitoring signal, the second monitoring signal, the first driving signal and the second driving signal, wherein 1 represents a high level and 0 represents a low level.

[0094] First monitoring signal Second monitoring signal The first driving signal The second driving signal 0 0 0 0 1 0 1 0 0 1 0 1 1 1 0 0

[0095] Table 1

[0096] It can be seen from Table 1 that when the first monitoring signal and the second monitoring signal are both at low levels (i.e., both AC charging ports are not electrically connected to the external power supply), the first drive signal and the second drive signal are also at low levels. Accordingly, the first relay 51 and the second relay 52 are controlled by the first control signal and the second control signal to remain in the disconnected state.

[0097] When the first monitoring signal is at a high level and the second monitoring signal is at a low level (i.e., the first AC charging port 21 is connected to an external power source, and the second AC charging port 22 is not connected to an external power source), the first driving signal is at a high level and the second driving signal is at a low level. Accordingly, the first control signal controls the first relay 51 to close and the second control signal controls the second relay 52 to remain in an open state, the first AC charging port 21 is electrically connected to the charging module 41, and the battery of the vehicle 100 is charged via the charging module 41.

[0098] When the first monitoring signal is at a low level and the second monitoring signal is at a high level (i.e., the first AC charging port 21 is not connected to the external power supply, and the first AC charging port 22 is connected to the external power supply), the first driving signal is at a low level and the second driving signal is at a high level. Accordingly, the first control signal controls the first relay 51 to remain in an open state and the second control signal controls the second relay 52 to close, the second AC charging port 22 is electrically connected to the charging module 41, and the battery of the vehicle 100 is charged via the charging module 41.

[0099] When both the first monitoring signal and the second monitoring signal are at a high level (i.e., both AC charging ports are electrically connected to an external power source), both the first drive signal and the second drive signal are at a low level. Accordingly, the first relay 51 and the second relay 52 are controlled by the first control signal and the second control signal to remain in a disconnected state. In other words, if the user electrically connects both AC charging ports to an external power source, the battery of the vehicle 100 cannot be charged, thereby avoiding the potential danger caused by the user charging the battery through two AC charging ports at the same time, thereby improving safety.

[0100] In other embodiments, other signals (such as an overcurrent protection signal, an overvoltage protection signal, etc.) may be used as inputs of the logic operation module 331 to achieve other desired functions (such as overcurrent protection, overvoltage protection, etc.).

[0101] In another embodiment, the present invention provides a vehicle, comprising a first AC charging port and a second AC charging port; a charging module for charging a battery of the vehicle when the first AC charging port or the second AC charging port is electrically connected to an external power supply; a first relay coupled between the first AC charging port and the charging module and used to control the power connection between the first AC charging port and the charging module; a second relay coupled between the second AC charging port and the charging module and used to control the power connection between the second AC charging port and the charging module; and a charging control device as described in each embodiment of the present invention.

[0102] Although embodiments of the present invention have been described with reference to several specific embodiments, it should be understood that embodiments of the present invention are not limited to the specific embodiments of the disclosed content. Embodiments of the present invention are intended to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims. The scope of the claims is consistent with the broadest interpretation, thereby including all such modifications and equivalent structures and functions.

Claims

1. A charging control device for a vehicle, the vehicle comprising a first AC charging port, a second AC charging port, a charging module, a first relay coupled between the first AC charging port and the charging module, and a second relay coupled between the second AC charging port and the charging module, the charging control device comprising: a charging monitoring module, coupled to the first AC charging port and the second AC charging port, and configured to: monitoring whether the first AC charging port is electrically connected to an external power source and generating a first monitoring signal; and monitoring whether the second AC charging port is electrically connected to the external power source and generating a second monitoring signal; as well as A relay control module is coupled to the charging monitoring module and is configured to control the first relay and the second relay as follows based on the first monitoring signal and the second monitoring signal: When the first monitoring signal and the second monitoring signal indicate that one of the first AC charging port and the second AC charging port is electrically connected to the external power source, controlling the corresponding one of the first relay and the second relay to close, thereby allowing the external power source to charge the battery of the vehicle via the charging module; as well as When the first monitoring signal and the second monitoring signal indicate that both the first AC charging port and the second AC charging port are electrically connected to the external power source or are not electrically connected to the external power source, the first relay and the second relay are controlled to remain in an off state.

2. The charging control device according to claim 1, wherein: The first monitoring signal and the second monitoring signal include a high level signal or a low level signal respectively, and the charging monitoring module is further configured as follows: generating a first high level signal when the first AC charging port is electrically connected to the external power source, and generating a first low level signal when the first AC charging port is disconnected from the external power source; as well as A second high level signal is generated when the second AC charging port is electrically connected to the external power source, and a second low level signal is generated when the second AC charging port is disconnected from the external power source.

3. The charging control device according to claim 1 or 2, wherein: The relay control module comprises: a logic operation module, coupled to the charge monitoring module and configured to generate a first driving signal and a second driving signal based on the first monitoring signal and the second monitoring signal; and A driving module is coupled to the logic operation module and is configured to generate a first control signal based on the first driving signal and to generate a second control signal based on the second driving signal, wherein the first control signal is used to control the first relay to be opened or closed, and the second control signal is used to control the second relay to be opened or closed.

4. The charging control device according to claim 3, wherein: The logic operation module comprises: a first inverter, whose input terminal is coupled to the charging monitoring module and configured to perform an inversion operation on the first monitoring signal; a second inverter, whose input terminal is coupled to the charging monitoring module and configured to perform an inversion operation on the second monitoring signal; a first AND gate, whose input end is coupled to the charging monitoring module and the output end of the second inverter, and is configured to generate the first driving signal by performing an AND operation on the first monitoring signal and the inverted second monitoring signal; and The second AND gate has an input end coupled to the charging monitoring module and an output end of the first inverter, and is configured to generate the second driving signal by performing an AND operation on the second monitoring signal and the inverted first monitoring signal.

5. The charging control device according to claim 3, wherein: The driving module comprises: a first driving circuit coupled to the logic operation module and configured to generate the first control signal based on the first driving signal; and The second driving circuit is coupled to the logic operation module and is configured to generate the second control signal based on the second driving signal.

6. The charging control device according to claim 2, wherein: The charging monitoring module comprises: a first signal processing module coupled to the first AC charging port and configured to process an AC signal from the external power source to generate the first high level signal when the first AC charging port is electrically connected to the external power source; and The second signal processing module is coupled to the second AC charging port and is configured to process an AC signal from the external power source to generate the second high level signal when the second AC charging port is electrically connected to the external power source.

7. The charging control device according to claim 6, wherein: The first signal processing module comprises: a first filtering circuit coupled to the first AC charging port and configured to perform a first filtering process on the AC signal from the external power source when the first AC charging port is electrically connected to the external power source; a first analog-to-digital conversion circuit, coupled to the first filtering circuit and configured to convert the filtered AC signal into a first DC signal; a second filtering circuit, coupled to the first analog-to-digital conversion circuit and configured to perform a second filtering process on the first DC signal; and The first voltage divider circuit is coupled to the second filtering circuit and is configured to divide the voltage of the filtered first DC signal to generate the first high level signal.

8. The charging control device according to claim 7, wherein: The second signal processing module comprises: a third filtering circuit coupled to the second AC charging port and configured to perform a third filtering process on an AC signal from an external power source when the second AC charging port is electrically connected to the external power source; a second analog-to-digital conversion circuit, coupled to the third filtering circuit and configured to convert the filtered AC signal into a second DC signal; a fourth filtering circuit, coupled to the second analog-to-digital conversion circuit and configured to perform a fourth filtering process on the second DC signal; and The second voltage divider circuit is coupled to the fourth filtering circuit and is configured to divide the voltage of the filtered second DC signal to generate the second high level signal.

9. The charging control device according to claim 8, wherein: The first filtered DC signal is used to power the first relay, and the second filtered DC signal is used to power the second relay.

10. The charging control device according to claim 9, wherein: The first DC signal and the second DC signal are 12V voltage signals.

11. The charging control device according to claim 8, wherein: The charging monitoring module also includes: A DC voltage conversion circuit is coupled to the second filtering circuit and the fourth filtering circuit and is configured to convert the filtered first DC signal and / or the filtered second DC signal into a third DC signal for powering the relay control module.

12. The charging control device according to claim 11, wherein: The third DC signal is a 5V voltage signal.

13. A vehicle comprising: a first AC charging port and a second AC charging port; a charging module configured to charge a battery of the vehicle when the first AC charging port or the second AC charging port is electrically connected to an external power source; a first relay coupled between the first AC charging port and the charging module and configured to control a power connection between the first AC charging port and the charging module; a second relay coupled between the second AC charging port and the charging module and configured to control a power connection between the second AC charging port and the charging module; and A charging control device according to any one of claims 1 to 12.

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