Power supply circuit of intelligent controller and electric vehicle

Abstract

The application provides a power supply circuit of an intelligent controller and an electric vehicle. In the power supply circuit, a first DC / DC circuit is connected with a power battery of the electric vehicle, used for processing an output voltage of the power battery and serving as a first power supply; a second DC / DC circuit is connected with the first DC / DC circuit, used for processing an output voltage of the first DC / DC circuit and serving as a second power supply; and a backup battery is connected with a communication positioning module in the intelligent controller. The first DC / DC circuit is further connected with the backup battery through a linear charging chip, used for charging the backup battery; and the second DC / DC circuit is further connected with the communication positioning module, used for supplying power to the communication positioning module. Compared with the prior art, the linear charging chip in the application does not exist in the case of being set to a larger current output value, thus a part of electric energy can be saved compared with the prior art, so that the energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of intelligent control technology for electric vehicles, and in particular to a power supply circuit for an intelligent controller and an electric vehicle. Background Technology

[0002] Electric vehicles, such as electric bicycles, electric motorcycles, and electric mopeds, have become the preferred mode of transportation for short distances due to their lightweight nature. However, precisely because of this lightweight nature, on the one hand, users often lose their electric vehicles, for example, when they are pushed to other locations by others; on the other hand, electric vehicle theft is also frequent. These issues have become pain points for the electric vehicle industry.

[0003] With the development of intelligent technology, some manufacturers have added positioning and networking modules to electric vehicles. In conjunction with applications developed by the manufacturers, users can know the real-time location of their electric vehicles, which can solve the problem of users not being able to find their electric vehicles and also reduce the probability of electric vehicles being stolen to a certain extent.

[0004] However, in practical applications, electric vehicle battery theft is frequent. Once the battery is stolen, the positioning and networking modules lose power, making it impossible for users to locate the vehicle. Therefore, to ensure users can still locate their electric vehicle after a battery theft, some manufacturers include a backup battery in the vehicle. This backup battery powers the positioning and networking modules even if the battery is stolen, allowing users to still track the vehicle's location and minimizing potential losses. Of course, in other situations, such as when the electric vehicle battery is completely depleted, the backup battery will also power the positioning and networking modules.

[0005] It's understandable that adding a battery would increase energy consumption, but currently there are no designs on the market to reduce energy consumption. Given the large number of electric vehicles on the road today, it is necessary to provide a technical solution to reduce energy consumption for the aforementioned electric vehicles. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a power supply circuit for an intelligent controller and an electric vehicle for reducing energy consumption.

[0007] Firstly, this application provides a power supply circuit for an intelligent controller, comprising:

[0008] A first DC / DC circuit is connected to the power battery of the electric vehicle and is used to process the output voltage of the power battery and serve as a first power supply; the voltage value after processing by the first DC / DC circuit is a first preset voltage value.

[0009] The second DC / DC circuit is connected to the first DC / DC circuit and is used to process the output voltage of the first DC / DC circuit and serve as a second power supply; the voltage value after processing by the second DC / DC circuit is a second preset voltage value, which is less than the first preset voltage value.

[0010] A backup battery is connected to the communication and positioning module in the intelligent controller.

[0011] The first DC / DC circuit is also connected to the backup battery via a linear charging chip for charging the backup battery; the second DC / DC circuit is also connected to the communication positioning module for supplying power to the communication positioning module.

[0012] In some embodiments, the backup battery and the second DC / DC circuit are both connected to the communication positioning module via a switching circuit;

[0013] The switching circuit is configured to: when the power battery has output, connect the second DC / DC circuit to the communication positioning module; when the power battery has no output, connect the backup battery to the communication positioning module.

[0014] In some embodiments, the switching circuit includes a PMOS transistor and a voltage divider resistor;

[0015] The second DC / DC circuit is connected to the communication positioning module and grounded through the voltage divider resistor; the connection point between the second DC / DC circuit and the voltage divider resistor is connected to the control pin of the PMOS transistor.

[0016] The two switching pins of the PMOS transistor are connected between the backup battery and the communication positioning module.

[0017] In some embodiments, the second DC / DC circuit is connected to the communication positioning module via a diode.

[0018] In some embodiments, a low-dropout linear regulator is also included;

[0019] The low-dropout linear regulator is connected to the first DC / DC circuit and is used to process the output voltage of the first DC / DC circuit and serve as a third power supply. The voltage value after processing by the low-dropout linear regulator is a third preset voltage value, which is less than the second preset voltage value.

[0020] In some embodiments, a power switch is also included connected between the low-dropout linear regulator and the first DC / DC circuit; the power switch is also connected to the backup battery.

[0021] The power switch is used to: connect the first DC / DC circuit to the low-dropout linear regulator, or connect the backup battery to the low-dropout linear regulator.

[0022] In some embodiments, the control terminal of the power switch is also connected to the intelligent controller, and is used to select the conduction channel under the control of the intelligent controller;

[0023] And / or, the control terminal of the power switch is also connected to the first DC / DC circuit for selecting the conduction channel under the control of the first DC / DC circuit.

[0024] In some embodiments, the input and / or output terminals of the low-dropout linear regulator are connected to a filter circuit.

[0025] In some embodiments, a filter circuit is connected to the input and / or output of the first DC / DC circuit; and a filter circuit is connected to the input and / or output of the second DC / DC circuit.

[0026] Secondly, this application provides an electric vehicle including a power battery, an intelligent controller, and a power supply circuit as described in any embodiment of the first aspect.

[0027] Based on the above technical solution, this application sets up a two-stage power supply. A first DC / DC circuit serves as the first-stage power supply, and a second DC / DC circuit serves as the second-stage power supply. The first-stage power supply includes charging the backup battery, while the second-stage power supply is dedicated to powering the communication and positioning module. In this way, the linear charging chip has only one load—the backup battery. Compared to existing technologies, the linear charging chip is not configured to output a larger current value, thus saving some energy and reducing power consumption. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application, and not all of the embodiments. For those skilled in the art, other drawings obtained from these drawings without creative effort are all within the scope of protection of this application.

[0029] Figure 1 This is a schematic diagram of the power supply circuit structure of the communication and positioning module of an electric vehicle in the prior art;

[0030] Figure 2 A schematic diagram of a power supply circuit for an intelligent controller provided in an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of a circuit structure for a switching circuit in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of another circuit structure of the power supply circuit of the intelligent controller in the embodiments of this application;

[0033] Figure 5 This is a schematic diagram of a circuit structure of a switching power supply in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of an electric vehicle provided in an embodiment of this application. Detailed Implementation

[0035] In existing technologies, the power supply circuit for the communication and positioning module of some electric vehicles can be as follows: Figure 1 As shown, the linear charging chip is connected to the power battery on one side and to the backup battery and communication / positioning module (i.e., a module with communication and positioning functions) on the other. Specifically, the linear charging chip can process the electrical energy output from the power battery, such as adjusting the voltage, and provide the processed electrical energy to the communication / positioning module and / or the backup battery. It should be noted that linear charging chips are characterized by simple circuitry, low cost, and low noise; therefore, most manufacturers prioritize the use of linear charging chips for power supply. Furthermore, it should be noted that linear charging chips are existing technology; therefore, their implementation in this application will not be specifically discussed.

[0036] Therefore, when the power battery has power, the linear charging chip supplies power to the communication and positioning module. During this process, if the backup battery's power is insufficient, the linear charging chip also supplies power to the backup battery simultaneously. When the power battery is depleted, the backup battery supplies power to the communication and positioning module.

[0037] As shown above, when the backup battery is low on power, the linear charging chip needs to charge both the backup battery and power the communication and positioning module. Therefore, the linear charging chip needs to be set to a higher current output value to ensure stable operation of the communication and positioning module. However, setting a higher current output for a linear charging chip generally falls under the category of high-current applications. This reduces the chip's conversion efficiency, leading to greater power loss and ultimately increased energy consumption.

[0038] Therefore, this application provides a power supply circuit for an intelligent controller and an electric vehicle to solve the energy loss caused by charging the aforementioned electric vehicle when the backup battery is low, thereby reducing energy consumption. It is understood that the number of electric vehicles in use is very large, and the energy saved through this application embodiment is also substantial.

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0040] like Figure 2 As shown in the embodiment of this application, a power supply circuit 100 for an intelligent controller 200 may include a first DC / DC circuit 110, a second DC / DC circuit 120, a backup battery 130, and a linear charging chip 140. In this embodiment, the intelligent controller 200 may include a communication and positioning module 210, which has communication and positioning functions. Furthermore, as mentioned above, the linear charging chip 140 is existing technology, and its specific implementation will not be discussed in detail in this embodiment. In this embodiment, the backup battery 130 is connected to the communication and positioning module 210 in the intelligent controller 200, and is used to supply power to the communication and positioning module 210 when the power battery has no power output. Therefore, when an electric vehicle power battery is stolen, the user can also know the real-time location of the electric vehicle with the power supply of the backup battery 130.

[0041] The first DC / DC circuit 110 is connected to the power battery 300 of the electric vehicle. It processes the output voltage of the power battery 300 and uses it as the first power supply VCC1. The voltage value processed by the first DC / DC circuit 110 is a first preset voltage value. For example, the output voltage of the power battery 300 of the electric vehicle can be 24V, 36V, 48V, 60V, 72V, etc. For example, the first DC / DC circuit 110 can be implemented as an integrated chip or a BUCK circuit, etc. For example, since common input / output voltages in the field of intelligent control include 5V (e.g., 5V devices), the voltage value processed by the first DC / DC circuit 110 can be 5V.

[0042] The second DC / DC circuit 120 is connected to the first DC / DC circuit 110 and is used to process the output voltage of the first DC / DC circuit 120 as a second power supply VCC2. The voltage value processed by the second DC / DC circuit 120 is a second preset voltage value, which is less than the first preset voltage value. Similarly, the second DC / DC circuit 120 can be implemented as an integrated chip, a BUCK circuit, etc. For example, since the common power supply voltage of the communication positioning module 210 includes 3.8V, the voltage value processed by the second DC / DC circuit 120 can be 3.8V.

[0043] In this embodiment, the first DC / DC circuit 110 can also be connected to the backup battery 130 via a linear charging chip 140 to charge the backup battery 130 when it is depleted or has a low charge level. For example, the minimum charge level of the backup battery 130 can be set to 30%. When the backup battery 130's charge level is below 30%, the power battery 300 charges the backup battery 130 via the first DC / DC circuit 110 and the linear charging chip 140. For example, the linear charging chip 140 can be an LGS4056HDA-4.35 DFN-8 (2x2) chip, etc. Furthermore, the second DC / DC circuit 120 is also connected to the communication positioning module 210 to supply power to the communication positioning module 210. That is, when the power battery 300 has power output, the second DC / DC circuit 120 specifically supplies power to the communication positioning module 210.

[0044] Therefore, this embodiment of the application sets up a two-stage power supply. The first DC / DC circuit 110 serves as the first-stage power supply, and the second DC / DC circuit 120 serves as the second-stage power supply. The first-stage power supply includes charging the backup battery 130, while the second-stage power supply is dedicated to powering the communication positioning module 210. In this way, the linear charging chip 140 only has the backup battery 130 as its load. Compared with the prior art, the linear charging chip 140 is not set to a larger current output value, thus saving some power and reducing energy consumption.

[0045] For example, when the electric vehicle is in normal use, the power battery 300 outputs electrical energy to the first DC / DC circuit 110. On the one hand, when the backup battery 130 needs charging, the first DC / DC circuit 110 charges the backup battery 130 through the linear charging chip 140; on the other hand, the first DC / DC circuit 110 can also serve as a power supply for other devices (e.g., 5V devices). Furthermore, the first DC / DC circuit 110 outputs electrical energy to the second DC / DC circuit 120, which specifically supplies power to the communication and positioning module 210. When the power battery 300 has no power output (e.g., out of power or stolen), the backup battery 130 supplies power to the communication and positioning module 210.

[0046] For example, a filter circuit can be connected to the input and / or output terminals of the first DC / DC circuit 110, and similarly, a filter circuit can be connected to the input and / or output terminals of the second DC / DC circuit 120. The filter circuit can improve the quality of the electrical energy input to the first DC / DC circuit 110 and / or the electrical energy output by the first DC / DC circuit 110, and the same applies to the second DC / DC circuit 120.

[0047] In some embodiments, such as Figure 3 As shown, the backup battery 130 and the second DC / DC circuit 120 are both connected to the communication positioning module 210 via a switching circuit 150, which switches the power supply to the communication positioning module 210. Specifically, the switching circuit 150 is configured to: when the power battery 300 has output, connect the second DC / DC circuit 120 to the communication positioning module 210, that is, when the power battery 300 has power, the second DC / DC circuit 120 supplies power to the communication positioning module 210; when the power battery 300 has no output, connect the backup battery 130 to the communication positioning module 210, that is, when the power battery 300 is depleted, the backup battery 130 supplies power to the communication positioning module 210.

[0048] In some embodiments, such as Figure 3 As shown, the switching circuit 150 includes a PMOS transistor Q and a voltage divider resistor R. d In this embodiment, the second DC / DC circuit 120 is connected to the communication positioning module 210 and is connected via a voltage divider resistor R. d Grounded, and simultaneously, the second DC / DC circuit 120 and the voltage divider resistor R d The connection point is connected to the control pin of the PMOS transistor Q. Additionally, the two switching pins of the PMOS transistor Q are connected between the backup battery 130 and the communication positioning module 210.

[0049] It should be noted that the conduction condition of a PMOS transistor is that the voltage Vgs between its gate and source must be less than or equal to the threshold voltage Vth. Therefore, when the power battery 300 has power output, the second DC / DC circuit 120 supplies power to the communication positioning module 210 on the one hand, and on the other hand, it connects to the voltage divider resistor R... d The connection point outputs a voltage to the control pin of the PMOS transistor Q. This obviously causes the voltage Vgs between the gate and source of the PMOS transistor Q to be much greater than the threshold voltage Vth. Therefore, the PMOS transistor Q is turned off, and the backup battery 130 cannot supply power to the communication positioning module 210. Conversely, when the power battery 300 has no power output, the voltage Vgs between the gate and source of the PMOS transistor Q is less than the threshold voltage Vth. Therefore, the PMOS transistor Q is turned on, and the backup battery 130 supplies power to the communication positioning module 210.

[0050] In some embodiments, such as Figure 3 As shown, the second DC / DC circuit 120 is connected to the communication positioning module 120 through diode D. By utilizing the unidirectional conductivity of diode D, problems such as current backflow are prevented, ensuring that the power battery 300 can stably supply power to the communication positioning module 120 when there is no power output.

[0051] In some embodiments, such as Figure 4 As shown, the power supply circuit 100 may further include a low-dropout linear regulator 160. A low-dropout linear regulator, or LDO (Low Dropout Regulator), is existing technology, and its implementation will not be specifically discussed in this application. In this embodiment, the low-dropout linear regulator 160 is connected to the first DC / DC circuit 110, and is used to process the output voltage of the first DC / DC circuit 110 and serve as the third power supply VCC3. The voltage value processed by the low-dropout linear regulator 160 is a third preset voltage value, which is less than a second preset voltage value. For example, since common input / output voltages in the field of intelligent control also include 3.3V (e.g., 3.3V devices), the voltage value processed by the low-dropout linear regulator 160 can be 3.3V. For example, the input and / or output terminals of the low-dropout linear regulator 160 may be connected to a filter circuit, which can make the electrical energy input to the low-dropout linear regulator 160 and / or the electrical energy output by the low-dropout linear regulator 160 more efficient.

[0052] In some embodiments, such as Figure 4 As shown, the power supply circuit 100 may further include a power switch 170 connected between the low-dropout linear regulator 160 and the first DC / DC circuit 110, and the power switch 170 is also connected to the backup battery 130. In this embodiment, the power switch 170 switches the power supply to the low-dropout linear regulator 160. Specifically, the power switch 170 is used to: connect the first DC / DC circuit 110 and the low-dropout linear regulator 160, or connect the backup battery 130 and the low-dropout linear regulator 160. Exemplarily, the power switch 170 is existing technology; for example, a TPS2116DRLR chip may be used.

[0053] For example, the following functions can be achieved through configuration: when the power battery 300 has power output, the connection between the first DC / DC circuit 110 and the low-dropout linear regulator 160 is turned on, and the power battery 300 supplies power to the low-dropout linear regulator 160; when the power battery 300 has no power output, the connection between the backup battery 130 and the low-dropout linear regulator 160 is turned on, and the backup battery 130 supplies power to the low-dropout linear regulator 160.

[0054] In some embodiments, the control terminal of the power switch 170 can also be connected to the intelligent controller 200, which controls the selection of the conduction channel, that is, whether to connect the first DC / DC circuit 110 and the low-dropout linear regulator 160 or to connect the backup battery 130 and the low-dropout linear regulator 160. For example, the intelligent controller 200 can output a high level to the control terminal of the power switch 170, thus connecting the first DC / DC circuit 110 and the low-dropout linear regulator 160; conversely, the intelligent controller 200 can also output a low level to the control terminal of the power switch 170, thus connecting the backup battery 130 and the low-dropout linear regulator 160.

[0055] In other implementations, such as Figure 5 As shown, the control terminal of the power switch 170 can also be connected to the first DC / DC circuit 110 for selecting the conduction channel under the control of the first DC / DC circuit 110. For example, when the power battery 300 has power output, the first DC / DC circuit 110 outputs a high level to the control terminal of the power switch 170, and the power switch 170 connects the first DC / DC circuit 110 and the low-dropout linear regulator 160. Conversely, when the power battery 300 has power output, this is equivalent to the first DC / DC circuit 110 outputting a low level to the control terminal of the power switch 170, and the power switch 170 connects the backup battery 130 and the low-dropout linear regulator 160.

[0056] like Figure 6 As shown in the embodiments of this application, an electric vehicle 1000 may include a power supply circuit 100, an intelligent controller 200, and a power battery 300 as described in any of the above embodiments. Specific implementations of the electric vehicle 1000 can be found in the foregoing discussion, and will not be elaborated further in the embodiments of this application.

[0057] The above embodiments merely illustrate preferred implementations of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A power supply circuit for an intelligent controller, characterized in that, include: The first DC / DC circuit is connected to the power battery of the electric vehicle and is used to process the output voltage of the power battery and serve as the first power supply. The voltage value after processing by the first DC / DC circuit is a first preset voltage value; The second DC / DC circuit is connected to the first DC / DC circuit and is used to process the output voltage of the first DC / DC circuit and serve as a second power supply. The voltage value after processing by the second DC / DC circuit is a second preset voltage value, which is less than the first preset voltage value. A backup battery is connected to the communication and positioning module in the intelligent controller. The first DC / DC circuit is also connected to the backup battery via a linear charging chip for charging the backup battery; the second DC / DC circuit is also connected to the communication positioning module for supplying power to the communication positioning module.

2. The power supply circuit according to claim 1, characterized in that, The backup battery and the second DC / DC circuit are both connected to the communication positioning module via a switching circuit. The switching circuit is configured to: when the power battery has output, connect the second DC / DC circuit to the communication positioning module; when the power battery has no output, connect the backup battery to the communication positioning module.

3. The power supply circuit according to claim 2, characterized in that, The switching circuit includes a PMOS transistor and a voltage divider resistor; The second DC / DC circuit is connected to the communication positioning module and grounded through the voltage divider resistor; the connection point between the second DC / DC circuit and the voltage divider resistor is connected to the control pin of the PMOS transistor. The two switching pins of the PMOS transistor are connected between the backup battery and the communication positioning module.

4. The power supply circuit according to claim 3, characterized in that, The second DC / DC circuit is connected to the communication positioning module via a diode.

5. The power supply circuit according to any one of claims 1-4, characterized in that, It also includes low dropout linear regulators; The low-dropout linear regulator is connected to the first DC / DC circuit and is used to process the output voltage of the first DC / DC circuit and serve as a third power supply. The voltage value after processing by the low-dropout linear regulator is a third preset voltage value, which is less than the second preset voltage value.

6. The power supply circuit according to claim 5, characterized in that, It also includes a power switch connected between the low-dropout linear regulator and the first DC / DC circuit; the power switch is also connected to the backup battery. The power switch is used to: connect the first DC / DC circuit to the low-dropout linear regulator, or connect the backup battery to the low-dropout linear regulator.

7. The power supply circuit according to claim 6, characterized in that, The control terminal of the power switch is also connected to the intelligent controller, and is used to select the conduction channel under the control of the intelligent controller. And / or, the control terminal of the power switch is also connected to the first DC / DC circuit for selecting the conduction channel under the control of the first DC / DC circuit.

8. The power supply circuit according to claim 5, characterized in that, The input and / or output terminals of the low-dropout linear regulator are connected to a filter circuit.

9. The power supply circuit according to any one of claims 1-4, characterized in that, The input and / or output terminals of the first DC / DC circuit are connected to a filter circuit; and the input and / or output terminals of the second DC / DC circuit are connected to a filter circuit.

10. An electric vehicle, characterized in that, It includes a power battery, an intelligent controller, and a power supply circuit as described in any one of claims 1-9.

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