Solar charging control system, method, and vehicle

Abstract

To provide a solar charge control system for a vehicle that is able to efficiently charge generated power of a solar panel while suppressing deterioration of a high voltage battery.SOLUTION: A solar charge control system includes: a solar panel; a first battery capable of charging generated power of the solar panel and capable of supplying the power to a traveling motor; a second battery capable of being charged with the generated power of the solar panel; and a power conversion unit that controls distribution of the generated power of the solar panel to the first battery and the second battery, based on a predetermined distribution ratio. In a case where the first battery satisfies a first condition, the power conversion unit controls the distribution of the generated power, based on the distribution ratio in which a proportion of the first battery is increased in comparison with a case where the first battery does not satisfy the first condition when a vehicle is performing a power running operation. The power conversion unit controls the distribution of the generated power, based on a distribution ratio in which a proportion of the second battery is increased in comparison with a case where the first battery does not satisfy the first condition when the vehicle is performing a regenerative operation.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a solar charging control system for a vehicle that controls battery charging using power generated by a solar panel. [Background technology]

[0002] Patent document 1 discloses a solar charging control system for a vehicle that includes a solar panel, a solar DCDC converter provided corresponding to the solar panel, a high-voltage DCDC converter that supplies the output power of the solar DCDC converter to a high-voltage battery for driving a driving motor, and an auxiliary DCDC converter that supplies the output power of the solar DCDC converter to an auxiliary battery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-103006 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the solar charging control system described in Patent Document 1 above, when it is determined that regenerative power is being generated by the traction motor, the upper limit of the amount of power supplied from the solar panel to the high-voltage battery is controlled based on the amount of power obtained through regeneration and the amount of power that can be charged without causing the high-voltage battery to become overcharged.

[0005] However, the performance and lifespan of a high-voltage battery are affected and change depending on the environment in which the high-voltage battery is placed, the control state of the high-voltage battery, etc. In particular, in an operating environment in which a high-voltage battery is prone to deterioration, it is desirable to efficiently charge the high-voltage battery with the power generated by the solar panel while suppressing deterioration of the high-voltage battery.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a solar charging control system for a vehicle that can efficiently charge the high-voltage battery using the power generated by a solar panel while suppressing deterioration of the high-voltage battery. [Means for solving the problem]

[0007] In order to solve the above problems, one aspect of the disclosed technology is a solar charging control system mounted on a vehicle, comprising a solar panel, a first battery capable of charging the power generated by the solar panel and supplying power to a driving motor, a second battery capable of charging the power generated by the solar panel, and a power conversion unit that controls distribution of the power generated by the solar panel to the first battery and the second battery based on a predetermined distribution ratio, wherein when the first battery satisfies a first condition, when the vehicle is performing a powering operation in which power is output from the first battery to the driving motor, the power conversion unit controls distribution of the power generated by the solar panel based on a distribution ratio in which the proportion of the first battery is higher than when the first battery does not satisfy the first condition, and when the vehicle is performing a regenerative operation in which power is input from the driving motor to the first battery, the power conversion unit controls distribution of the power generated by the solar panel based on a distribution ratio in which the proportion of the second battery is higher than when the first battery does not satisfy the first condition. Effect of the Invention

[0008] According to the solar charging control system and the like disclosed above, when the vehicle is in an environment where the high-voltage battery is likely to deteriorate, the ratio of the power generated by the solar panel distributed between the high-voltage battery (first battery) and the auxiliary battery (second battery) during powering operation and regenerative operation is changed. This makes it possible to efficiently charge the high-voltage battery with the power generated by the solar panel while suppressing deterioration of the high-voltage battery. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing a schematic configuration of a solar charging control system according to an embodiment of the present invention. [Diagram 2] 1 is a flowchart of a first example of a solar charge distribution process executed by a solar charge control system. [Diagram 3] 2 is a flowchart of a second example of a solar charge distribution process executed by the solar charge control system. [Figure 4] A diagram explaining the effect of input and output loads on a high-voltage battery DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The solar charging control system according to the present disclosure changes the ratio of power distributed from the solar panel to the high-voltage battery and the auxiliary battery according to the power running or regenerative operation of the vehicle when the vehicle is in an environment where the high-voltage battery is likely to deteriorate. This control reduces the input / output load of the high-voltage battery, suppressing the progression of deterioration of the high-voltage battery. Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0011] <Embodiment> [composition] Fig. 1 is a block diagram showing a schematic configuration of a solar charging control system according to an embodiment of the present disclosure. The solar charging control system 1 illustrated in Fig. 1 includes a solar panel 10, a solar DDC 20, a high-voltage DDC 30, an auxiliary DDC 40, a high-voltage battery 50, an auxiliary battery 60, a capacitor 70, a distribution unit 80, and a control unit 100. In Fig. 1, connection lines for transmitting and receiving electric power are indicated by solid lines, and connection lines for communicating control instructions, detection values, and the like are indicated by dotted lines. This solar charging control system 1 can be mounted on electric vehicles such as hybrid vehicles (HVs), plug-in hybrid vehicles (PHVs), and electric vehicles (EVs) that use a traction motor 110 as a power source.

[0012] The solar panel 10 is a power generating device that generates power when irradiated with sunlight, and is typically a solar cell module that is an assembly of solar cells. The solar panel 10 can be installed, for example, on the roof of a vehicle. The solar panel 10 is connected to a solar DDC 20, which will be described later, and the power generated by the solar panel 10 is output to the solar DDC 20.

[0013] The solar DDC 20 is a DC-DC converter that supplies the power generated by the solar panel 10 to the high voltage DDC 30 and the auxiliary DDC 40 based on a distribution ratio controlled by a distribution unit 80 described later. When supplying power, the solar DDC 20 can convert (boost / step down) the generated voltage of the solar panel 10, which is the input voltage, to a predetermined voltage and output it to the high voltage DDC 30 and the auxiliary DDC 40.

[0014] In this embodiment, a system configuration using only one set of the above-mentioned solar panel 10 and solar DDC 20 configuration (solar unit) is described, but the system configuration may be such that multiple solar panel 10 and solar DDC 20 configurations are connected in parallel to the high-voltage DDC 30 and auxiliary DDC 40.

[0015] The high-voltage DDC 30 is a DC-DC converter that supplies the power output by the solar DDC 20 to the high-voltage battery 50 via the control unit 100 based on the distribution ratio controlled by the distribution unit 80. When supplying power, the high-voltage DDC 30 can convert (boost) the output voltage of the solar DDC 20, which is the input voltage, to a predetermined voltage and output it to the high-voltage battery 50.

[0016] The auxiliary DDC 40 is a DC-DC converter that supplies the power output by the solar DDC 20 to the auxiliary battery 60 based on a distribution ratio controlled by the distribution unit 80. When supplying power, the auxiliary DDC 40 can convert (step down) the output voltage of the solar DDC 20, which is an input voltage, to a predetermined voltage and output it to the auxiliary battery 60.

[0017] The high-voltage battery 50 (first battery) is a secondary battery configured to be chargeable and dischargeable, such as a lithium-ion battery or a nickel-metal hydride battery. This high-voltage battery 50 is connected to the high-voltage DDC 30 via the control unit 100 so as to be chargeable by the power output by the high-voltage DDC 30. The high-voltage battery 50 is also connected via the control unit 100 to a traveling motor 110 used for traveling the vehicle so as to be able to exchange power. An example of the high-voltage battery 50 mounted on the vehicle is a battery capable of supplying power required for the operation of main devices for driving the vehicle, such as the traveling motor 110, that is, a so-called driving battery.

[0018] The auxiliary battery 60 (second battery) is a secondary battery configured to be chargeable and dischargeable, such as a lithium ion battery or a lead storage battery. The auxiliary battery 60 is connected to the auxiliary DDC 40 so as to be chargeable by the power output by the auxiliary DDC 40. The auxiliary battery 60 mounted on the vehicle is a battery that can supply power necessary for the operation of auxiliary devices (not shown) other than those for driving the vehicle, such as lighting such as headlamps and interior lights, air conditioners such as heaters and coolers, and devices for automatic driving and advanced driving assistance.

[0019] The capacitor 70 is connected between the solar DDC 20 and the high voltage DDC 30 and the auxiliary DDC 40. The capacitor 70 is a large-capacitance element used for charging and discharging the power generated by the solar panel 10 as necessary, stabilizing the voltage of the connection point (intermediate point) where the output of the solar DDC 20 and the inputs of the high voltage DDC 30 and the auxiliary DDC 40 are connected. The capacitor 70 does not have to be included in the configuration of the solar charging control system 1.

[0020] The distribution unit 80 can acquire at least one of the temperature, voltage, and current amount per unit time of the high-voltage battery 50. To acquire these, values ​​detected by temperature sensors, voltage sensors, and current sensors provided in the high-voltage DDC 30 and the high-voltage battery 50 are used. Furthermore, the distribution unit 80 controls the operations of the solar DDC 20, the high-voltage DDC 30, and the auxiliary DDC 40 based on the acquired temperature, voltage, and current amount per unit time of the high-voltage battery 50, and performs processing to suitably distribute the power generated by the solar panel 10 to the high-voltage battery 50 and the auxiliary battery 60. This processing to suitably distribute the power generated by the solar panel 10 will be described later.

[0021] The above-mentioned solar DDC 20, high voltage DDC 30, auxiliary DDC 40, capacitor 70, and distribution unit 80 constitute a power conversion unit 90. A part or all of this power conversion unit 90 can be configured as an electronic control device (e.g., a solar ECU) that typically includes a processor, a memory, an input / output interface, and the like. The electronic control device can implement the above-mentioned various controls by having the processor read and execute a program stored in the memory.

[0022] The control unit 100 interconnects the high voltage DDC 30, the high voltage battery 50, and the traveling motor 110. The control unit 100 is a power control unit (PCU) that includes an inverter that drives the traveling motor 110 and a DC-DC converter that performs voltage conversion, and controls the power related to the power running operation output to the traveling motor 110 and the power related to the regenerative operation input from the traveling motor 110.

[0023] The traveling motor 110 is a motor generator used to drive the vehicle. This traveling motor 110 inputs electric power from the high-voltage battery 50 via the control unit 100 when the vehicle is performing a power running operation, and outputs electric power (regenerative electric power) to the high-voltage battery 50 via the control unit 100 when the vehicle is performing a regenerative operation.

[0024] [control] Next, some of the controls performed by the solar charging control system 1 will be described with further reference to FIGS.

[0025] (1) First Example Fig. 2 is a flowchart for explaining a first example of the solar charge distribution process executed by the power conversion unit 90 of the solar charge control system 1. As an example, the solar charge distribution process of the first example shown in Fig. 2 is started when the ignition of the vehicle is turned on (IG-ON), and is repeatedly executed until the ignition of the vehicle is next turned off (IG-OFF).

[0026] (Step S201) The power conversion unit 90 judges whether or not the high-voltage battery 50 satisfies a predetermined first condition. This first condition is a condition for judging whether or not the high-voltage battery 50 is in an operating environment in which it is likely to deteriorate, and examples of the first condition include the following:

[0027] First, an example of an environment in which deterioration is likely to occur is a high temperature of the high voltage battery 50. Therefore, a temperature above which deterioration is likely to occur is set as a first threshold, and it is possible to determine that the first condition is satisfied when the temperature of the high voltage battery 50 becomes equal to or higher than the first threshold.

[0028] Furthermore, an example of an environment in which deterioration is likely to occur is a low temperature of the high-voltage battery 50. Therefore, the temperature below which deterioration is likely to occur is set as a second threshold value (lower than the first threshold value), and it can be determined that the first condition is satisfied when the temperature of the high-voltage battery 50 becomes equal to or lower than the second threshold value.

[0029] Another example of a usage environment that is prone to deterioration is a large amount of current per unit time of the high-voltage battery 50. Therefore, the amount of current per unit time above which the battery is prone to deterioration is set as a third threshold, and it can be determined that the first condition is satisfied when the amount of current per unit time of the high-voltage battery 50 is equal to or greater than the third threshold.

[0030] Furthermore, an example of an environment in which deterioration is likely to occur is when the voltage of the high-voltage battery 50 is high. Therefore, the voltage above which deterioration is likely to occur is set as a fourth threshold, and it is possible to determine that the first condition is satisfied when the voltage of the high-voltage battery 50 becomes equal to or higher than the fourth threshold.

[0031] Furthermore, an example of a usage environment in which deterioration is likely to occur is a low voltage of the high-voltage battery 50. Therefore, the voltage below which deterioration is likely to occur is set as a fifth threshold (lower than the fourth threshold), and it is possible to determine that the first condition is satisfied when the temperature of the high-voltage battery 50 becomes equal to or lower than the fifth threshold.

[0032] Note that only one of the above-mentioned five conditions may be set as the first condition, or a combination of a plurality of conditions may be set as the first condition.

[0033] If the high-voltage battery 50 satisfies the first condition, i.e., if the high-voltage battery 50 is in an environment where it is likely to deteriorate (step S201, Yes), the process proceeds to step S202. On the other hand, if the high-voltage battery 50 does not satisfy the first condition, i.e., if the high-voltage battery 50 is not in an environment where it is likely to deteriorate (step S201, No), the process proceeds to step S203.

[0034] (Step S202) The power conversion unit 90 determines whether the vehicle is performing a power running operation in which power is output from the high-voltage battery 50 to the traveling motor 110, or a regenerative operation in which power is input from the traveling motor 110 to the high-voltage battery 50. This determination may be made based on the torque generated in the traveling motor 110, or based on a change in the power (amount of stored electricity) of the high-voltage battery 50, or based on the direction (inflow / outflow) of the current flowing to the high-voltage battery 50, or based on a change (increase / decrease) in the voltage of the high-voltage battery 50.

[0035] If the vehicle is performing a power running operation (step S202, power running), the process proceeds to step S204. On the other hand, if the vehicle is performing a regenerative operation (step S202, regeneration), the process proceeds to step S205.

[0036] (Step S203) The power conversion unit 90 sets the ratio at which the power generated by the solar panel 10 is distributed to the high-voltage battery 50 and the auxiliary battery 60 to a first distribution ratio (default) when the high-voltage battery 50 is not in an operating environment where it is likely to deteriorate. As an example, the first distribution ratio can be set to high-voltage battery:auxiliary battery=50:50[%]. Once the first distribution ratio is set as the distribution ratio, the process returns to step S201.

[0037] (Step S204) The power conversion unit 90 sets the ratio at which the power generated by the solar panel 10 is distributed to the high-voltage battery 50 and the auxiliary battery 60 to a second distribution ratio. More specifically, since the vehicle is in an environment in which the high-voltage battery 50 is easily deteriorated and the vehicle is performing power running, the second distribution ratio is set to a ratio that is increased compared to the first distribution ratio and that is allocated to the high-voltage battery 50 in order to increase the supply (charging) to the high-voltage battery 50 in order to reduce the power taken from the high-voltage battery 50 to the traction motor 110. As an example, the second distribution ratio can be set to high-voltage battery:auxiliary battery=80:20[%]. Once the second distribution ratio is set as the distribution ratio, the process returns to step S201.

[0038] (Step S205) The power conversion unit 90 sets the ratio at which the power generated by the solar panel 10 is distributed to the high-voltage battery 50 and the auxiliary battery 60 to a third distribution ratio. More specifically, since the high-voltage battery 50 is in an operating environment where it is prone to deterioration and the vehicle is performing a regenerative operation, the third distribution ratio is set by increasing the ratio allocated to the auxiliary battery 60 compared to the first distribution ratio in order to reduce the supply (charging) to the high-voltage battery 50 in order to reduce the total power charged to the high-voltage battery 50. As an example, the third distribution ratio can be set to high-voltage battery:auxiliary battery=20:80[%]. Once the third distribution ratio has been set as the distribution ratio, the process returns to step S201.

[0039] According to the solar charging distribution process of the first example, when the high-voltage battery 50 is in an environment where it is likely to deteriorate, the distribution ratio of the power generated by the solar panel 10 can be appropriately controlled to reduce the input / output load of the high-voltage battery 50 (see FIG. 4). This makes it possible to suppress deterioration of the high-voltage battery 50. Furthermore, according to the solar charging distribution process of the first example, the distribution ratio is simply changed according to the operating state of the vehicle (power running / regeneration), so that all of the power generated by the solar panel 10 can be effectively utilized.

[0040] (2) Second Example Fig. 3 is a flow chart for explaining a second example of the solar charge distribution process executed by the power conversion unit 90 of the solar charge control system 1. The second example of the solar charge distribution process shown in Fig. 3 is an example in which the distribution ratio is changed stepwise according to the temperature of the high voltage battery 50. As an example, the second example of the solar charge distribution process is started when the vehicle ignition is turned on (IG-ON), and is repeatedly executed until the vehicle ignition is next turned off (IG-OFF).

[0041] (Step S301) The power conversion unit 90 judges whether the temperature of the high-voltage battery 50 is equal to or higher than a first reference value. This first reference value can be a predetermined temperature lower than the first threshold value, which is a high temperature at which the high-voltage battery 50 is likely to deteriorate, as described in the first example above. If the high-voltage battery 50 is equal to or higher than the first reference value (step S301, Yes), the process proceeds to step S302. On the other hand, if the high-voltage battery 50 is less than the first reference value (step S301, No), the process proceeds to step S303.

[0042] (Step S302) The power conversion unit 90 determines whether the vehicle is performing a power running operation in which power is output from the high-voltage battery 50 to the traveling motor 110, or a regenerative operation in which power is input from the traveling motor 110 to the high-voltage battery 50. The method of this determination is as described above. If the vehicle is performing a power running operation (step S302, power running), the process proceeds to step S304. On the other hand, if the vehicle is performing a regenerative operation (step S302, regeneration), the process proceeds to step S305.

[0043] (Step S303) The power conversion unit 90 sets the ratio at which the power generated by the solar panel 10 is distributed to the high-voltage battery 50 and the auxiliary battery 60 to a first distribution ratio, which is a default when the high-voltage battery 50 is not in an environment where it is likely to deteriorate. As an example, the first distribution ratio can be set to high-voltage battery:auxiliary battery=50:50[%]. Once the first distribution ratio is set as the distribution ratio, the process returns to step S301.

[0044] (Step S304) The power conversion unit 90 sets the ratio at which the power generated by the solar panel 10 is distributed to the high voltage battery 50 and the auxiliary battery 60 to a second distribution ratio. More specifically, since the high voltage battery 50 is approaching a high temperature at which it is likely to deteriorate while the vehicle is in power running, the second distribution ratio is set by slightly increasing the ratio allocated to the high voltage battery 50 compared to the first distribution ratio in order to reduce the power taken from the high voltage battery 50 to the traction motor 110 and to increase the power supplied (charged) to the high voltage battery 50. As an example, the second distribution ratio can be set to high voltage battery:auxiliary battery=60:40[%]. Once the second distribution ratio is set as the distribution ratio, the process proceeds to step S306.

[0045] (Step S305) The power conversion unit 90 sets the ratio at which the power generated by the solar panel 10 is distributed to the high voltage battery 50 and the auxiliary battery 60 to a third distribution ratio. More specifically, since the high voltage battery 50 is approaching a high temperature at which it is easily deteriorated while the vehicle is performing a regenerative operation, the third distribution ratio is set by slightly increasing the ratio allocated to the auxiliary battery 60 compared to the first distribution ratio in order to reduce the total power charged to the high voltage battery 50 and to reduce the supply (charging) to the high voltage battery 50. As an example, the third distribution ratio can be set to high voltage battery:auxiliary battery=40:60[%]. Once the third distribution ratio is set as the distribution ratio, the process proceeds to step S306.

[0046] (Step S306) The power conversion unit 90 judges whether the temperature of the high-voltage battery 50 is equal to or higher than a second reference value. This second reference value can be the first threshold value, which is a high temperature at which the high-voltage battery 50 is likely to deteriorate, as described in the first example above. If the high-voltage battery 50 is equal to or higher than the second reference value (step S306, Yes), the process proceeds to step S307. On the other hand, if the high-voltage battery 50 is less than the second reference value (step S306, No), the process proceeds to step S301.

[0047] (Step S307) The power conversion unit 90 determines whether the vehicle is performing a power running operation in which power is output from the high-voltage battery 50 to the traveling motor 110, or a regenerative operation in which power is input from the traveling motor 110 to the high-voltage battery 50. The method of this determination is as described above. If the vehicle is performing a power running operation (step S307, power running), the process proceeds to step S308. On the other hand, if the vehicle is performing a regenerative operation (step S307, regeneration), the process proceeds to step S309.

[0048] (Step S308) The power conversion unit 90 sets the ratio of distributing the power generated by the solar panel 10 to the high voltage battery 50 and the auxiliary battery 60 to a fourth distribution ratio. More specifically, since the high voltage battery 50 has reached a high temperature (=first threshold) at which it is easily deteriorated while the vehicle is in power running operation, the power conversion unit 90 sets the fourth distribution ratio, which is a further increase in the ratio allocated to the high voltage battery 50 compared to the second distribution ratio, in order to further reduce the power taken from the high voltage battery 50 to the traction motor 110 and further increase the power supplied (charged) to the high voltage battery 50. As an example, the fourth distribution ratio can be set to high voltage battery:auxiliary battery=80:20[%]. Once the fourth distribution ratio has been set as the distribution ratio, the process returns to step S301.

[0049] (Step S305) The power conversion unit 90 sets the ratio of distributing the power generated by the solar panel 10 to the high voltage battery 50 and the auxiliary battery 60 to a fifth distribution ratio. More specifically, since the high voltage battery 50 has reached a high temperature (=first threshold) at which it is easily deteriorated while the vehicle is performing a regenerative operation, the power conversion unit 90 sets the fifth distribution ratio, which is a further increase in the ratio allocated to the auxiliary battery 60 compared to the third distribution ratio, in order to further reduce the total power charged to the high voltage battery 50 and further reduce the supply (charging) to the high voltage battery 50. As an example, the fifth distribution ratio can be set to high voltage battery:auxiliary battery=20:80[%]. Once the fifth distribution ratio has been set as the distribution ratio, the process returns to step S301.

[0050] According to the solar charging distribution process of the second example, when the high-voltage battery 50 is approaching an operating environment in which it is prone to deterioration, the distribution ratio of the power generated by the solar panel 10 is changed stepwise and controlled, thereby suitably reducing the input / output load of the high-voltage battery 50 (see FIG. 4). Therefore, since the temperature rise of the high-voltage battery 50 can be suppressed before the operating environment in which it is prone to deterioration is reached, deterioration of the high-voltage battery 50 can be suppressed. Furthermore, according to the solar charging distribution process of the second example, the distribution ratio is simply changed according to the operating state of the vehicle (power running / regeneration), so that all of the power generated by the solar panel 10 can be effectively utilized.

[0051] In the solar charging distribution process of the second example, the distribution ratio is controlled in two stages using the first and second reference values, but the distribution ratio may be finely controlled by dividing it into three or more stages using reference values. In the solar charging distribution process of the second example, the stepwise control of the distribution ratio when the temperature of the high-voltage battery 50 rises has been described, but similar stepwise control can be applied to any of the following cases: when the temperature of the high-voltage battery 50 falls, when the amount of current per unit time of the high-voltage battery 50 increases, when the voltage of the high-voltage battery 50 rises, and when the voltage of the high-voltage battery 50 falls.

[0052] <Actions and Effects> As described above, the solar charging control system 1 according to an embodiment of the present disclosure determines whether the high-voltage battery 50 is in an environment where it is likely to deteriorate and whether the vehicle is in a power running or regenerative operating state, and if the high-voltage battery 50 is in an environment where it is likely to deteriorate, appropriately changes the ratio of power distributed from the solar panel 10 to the high-voltage battery 50 and the auxiliary battery 60 according to the power running or regenerative operating state of the vehicle. This reduces the input / output load of the high-voltage battery 50 (the occurrence of charging and discharging due to the input / output of a large current) and suppresses the progression of deterioration of the high-voltage battery 50.

[0053] Furthermore, according to the solar charging control system 1 of this embodiment, the total amount of generated power supplied from the solar panel 10 to the high voltage battery 50 and the auxiliary battery 60 does not change simply by changing the ratio of power distributed to the high voltage battery 50 and the auxiliary battery 60. Therefore, all of the power generated by the solar panel 10 can be effectively utilized without waste.

[0054] The above describes one embodiment of the disclosed technology, but the present disclosure can be understood as not only a solar charging control system, but also a method performed by the solar charging control system, a program for that method, a computer-readable non-transitory storage medium storing the program, a vehicle equipped with a solar charging control system, and the like. [Industrial Applicability]

[0055] The solar charging control system of the present disclosure can be used in vehicles that charge their batteries using power generated by a solar panel. [Explanation of symbols]

[0056] 1. Solar charging control system 10. Solar Panels 20 Solar DDC 30 High Voltage DDC 40 Auxiliary DDC 50 High Voltage Battery 60 Auxiliary battery 70 Capacitor 80 Distribution section 90 Power Conversion Unit 100 Control Unit 110 Driving motor

Claims

1. A solar charging control system mounted on a vehicle, Solar panels and a first battery capable of being charged with power generated by the solar panel and capable of supplying power to a driving motor; a second battery capable of being charged with power generated by the solar panel; a power conversion unit that controls distribution of power generated by the solar panel to the first battery and the second battery based on a predetermined distribution ratio, When the first battery satisfies a first condition, the power conversion unit: When the vehicle is performing a power running operation in which electric power is output from the first battery to the traction motor, distribution of the generated electric power of the solar panel is controlled based on a distribution ratio in which a ratio of the first battery is increased compared to a case in which the first battery does not satisfy the first condition; A solar charging control system that controls the distribution of generated power from the solar panel based on a distribution ratio that increases the proportion of the second battery compared to when the first battery does not satisfy the first condition, when the vehicle is performing regenerative operation in which power is input from the traction motor to the first battery.

2. The solar charging control system of claim 1 , wherein the first condition includes a temperature of the first battery being equal to or higher than a first threshold, or a temperature of the first battery being equal to or lower than a second threshold that is lower than the first threshold.

3. 3 . The solar charging control system according to claim 1 , wherein the first condition includes a condition that an amount of current per unit time of the first battery is equal to or greater than a third threshold value. 4 .

4. The solar charging control system according to any one of claims 1 to 3, wherein the first condition includes that the voltage of the first battery is equal to or greater than a fourth threshold, or that the voltage of the first battery is equal to or less than a fifth threshold that is smaller than the fourth threshold.

5. A method performed by a solar charging control system mounted on a vehicle, the system comprising: a solar panel; a first battery capable of being charged with power generated by the solar panel and capable of supplying power to a driving motor; a second battery capable of being charged with power generated by the solar panel; and a power conversion unit that controls distribution of the power generated by the solar panel to the first battery and the second battery based on a predetermined distribution ratio, the method comprising: determining whether the first battery satisfies a first condition; determining whether the vehicle is performing a power running operation in which electric power is output from the first battery to the traveling motor, or a regenerative operation in which electric power is input from the traveling motor to the first battery; When the first battery satisfies the first condition and the vehicle is performing a power running operation, controlling distribution of the power generated by the solar panel based on a distribution ratio in which a ratio of the first battery is increased compared to when the first battery does not satisfy the first condition; and when the first battery satisfies the first condition and the vehicle is performing regenerative operation, controlling the distribution of power generated by the solar panel based on a distribution ratio in which the proportion of the second battery is increased compared to when the first battery does not satisfy the first condition.

6. A vehicle equipped with the solar charge control system according to any one of claims 1 to 4.

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