KR20200131053A - Battery Control System for An Electric Truck - Google Patents

Abstract

The present invention relates to a battery control system which calculates a power load amount of a plurality of electric devices in accordance with the driving or parking environment of an electric truck and controls the simultaneously discharged battery modules in accordance with the calculated load amount. According to the present invention, the load-based battery control system for an electric truck comprises: a plurality of battery modules to output power to two or more electric devices installed in an electric truck; a module switching unit to switch to discharge or shut off power of the plurality of battery modules; a load switching unit to selectively supply power discharged from the plurality of battery modules to the electric devices; a BMS to sense the state of charge (SOC) of the plurality of battery modules; a sensing unit to sense environment information including illumination, temperature, and loading weight; a communication unit to communicate with a smartphone of a user to receive a driving route, business hours, an electric vehicle type, and a driving environment condition for each electric device; and a power control unit to calculate the load wattage and an electric vehicle type to which power is to be supplied based on the state of charge of the battery modules, environmental information, and information of the driving route, the business hours, and driving environment condition for each electric device, and allow power to be discharged from at least one battery module among the plurality of battery modules to be supplied to at least one electric device in accordance with the calculated load wattage.

Description

Load-based battery control system for electric trucks {Battery Control System for An Electric Truck}

The present invention relates to a battery control system for an electric truck, and more particularly, calculating the current power load of a plurality of electric devices according to the driving or parking environment of the electric truck, and controlling battery modules that are simultaneously discharged according to the calculated load. It relates to a battery control system.

Recently, as the need for eco-friendly vehicles is increasing due to environmental regulations and oil prices, electric vehicles whose power source is electric rather than fossil fuel is drawing attention. Passenger cars and buses are actively being developed as electric vehicles, while electric trucks are being developed relatively slowly.

Normally, in the case of cars and buses, it is possible to completely cut off the battery power while parked, but in the case of food trucks or refrigerated/frozen delivery trucks that are mainly used for business, various electric facilities (e.g., refrigeration facilities, refrigeration facilities, Food equipment, lighting equipment, etc.) are required, and electric power must be continuously supplied to these electric equipment even in parking conditions. Electrical installations used in such electric trucks may or may not be required to operate depending on business hours, types of electrical installations, driving priorities for each electrical installation, and environmental conditions.

On the other hand, when driving an electric truck, if the loader of the electric truck is loaded with a lot of load, the vehicle is heavy and requires a high motor output for the operation of the electric truck, and if the loader is empty, operation with a low motor power is not possible. It becomes possible. That is, it is necessary to change the amount of power to be supplied to the driving motor according to the loading weight of the electric truck.

In addition, since electric trucks have to run with a battery as a driving source after completion of business or delivery, there is a problem in that driving power of the electric truck is insufficient if all of the remaining electric power is discharged in the electric facility in the parking state.

Therefore, in the case of electric trucks, appropriate electric power is supplied to a number of electric facilities installed in the truck in consideration of the remaining travel distance, load weight, and the type of electric equipment required to be driven when parking, with respect to the electric power supplied to the electric equipment and the driving motor. Battery control technology is needed for this.

Korean application KR20160154181A (2016-11-18) Korean application KR20160114608A (2016-09-06)

The object of the present invention is based on the collected environmental information, the driving route of the electric truck, the business hours, the state of charge of the battery modules, the driving environment conditions of the electric devices, the power load of the electric devices, the load weight, etc. The purpose of the present invention is to provide a load-based battery control system for an electric truck that calculates a power load to be simultaneously supplied to a plurality of electric devices while driving or parking and supplies power according to the calculated power load.

A load-based battery control system for an electric truck according to the present invention for achieving the above object comprises: a plurality of battery modules for outputting power to at least two electric devices installed in the electric truck;

A first module switching unit for switching the power of the first battery module among the plurality of battery modules to be discharged or cut off discharge;

A second module switching unit for switching the power of the second battery module among the plurality of battery modules to be discharged or cut off discharge;

A load switching unit configured to selectively supply power discharged from the plurality of battery modules to the electric devices;

A first BMS for sensing a state of charge (SOC) of the first battery module;

A second BMS for sensing a state of charge (SOC) of the second battery module;

A sensing unit for sensing environmental information including illumination, temperature, and loading weight;

A communication unit that communicates with the user's smartphone to receive input of a driving route, an operating time, an electric device type, and a driving environment condition for each electric device;

Power is supplied based on the charging status of the first battery module and the second battery module, environmental information detected by the sensing unit, driving route and business hours input from the smartphone, and driving environment condition information for each electric device. The electric device type and the amount of load power are calculated, and the first module switching unit and the second module switching unit are controlled according to the calculated amount of load power to discharge power from at least one of the first battery module and the second battery module. And a power control unit controlling the load switching unit so that the discharge power is supplied to at least one electric device.

As described above, according to the present invention, it is possible to selectively control the discharge of a plurality of battery modules according to the amount of power load currently required in the electric truck, so that optimal battery discharge management can be performed when driving and parking the electric truck. There is an advantage.

1 is a block diagram showing a load-based battery control system for an electric truck according to the present invention.
2 is a flow chart showing the operation of the load-based battery control system of the electric truck according to the present invention.

Hereinafter, a load-based battery control system for an electric truck according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram illustrating a load-based battery control system for an electric truck according to the present invention.

The electric truck to which this invention is applied is provided with a drive motor 111 for driving and a number of additional equipment 112, 113, and 114 that require power supply in a driving state or a parking state. In this invention, the drive motor 111 and a plurality of additional equipment (112, 113, 114) are collectively referred to as an electric device.

The load-based battery control system 110 for an electric truck according to the present invention includes a plurality of battery modules 115 and 116 for outputting power to at least two electric devices installed in the electric truck; A first module switching unit 117 for switching the power of the first battery module 115 among the plurality of battery modules to be discharged or blocked; A second module switching unit 118 for switching the power of the second battery module 116 among the plurality of battery modules to be discharged or blocked; A load switching unit 119 configured to selectively supply power discharged from the plurality of battery modules 115 and 116 to the electric devices; A first BMS (120) for sensing a state of charge (SOC) of the first battery module (115); A second BMS 121 for sensing a state of charge (SOC) of the second battery module 116; A charger 122 for charging the first battery module 115 and the second battery module 116; A sensing unit 123 for sensing environmental information including illumination, temperature, and loading weight; A communication unit 124 that communicates with the user's smartphone 130 to receive a driving route, an operating time, an electric device type, and a driving environment condition for each electric device; The charging status of the first battery module 115 and the second battery module 116, environmental information sensed by the sensing unit 123, a driving route, business hours, and electricity input from the smartphone 130 The first module switching unit 117 and the second module switching unit 118 are controlled according to the calculated electric device type and load wattage to supply power based on the driving environment condition information for each device. Power for discharging power from at least one of the battery module 115 and the second battery module 116 and controlling the load switching unit 119 to supply the discharged power to at least one electric device It includes a control unit 125.

The electric devices include a drive motor 111 and a number of additional facilities 112, 113, and 114. Additional facilities installed in the electric truck are generally necessary for business activities using the electric truck, and may include refrigeration facilities, refrigeration facilities, food cooking facilities, and lighting facilities.

The smartphone 130 includes a navigation unit 131 that receives driving route and business hours information from the user, and the type of electric device installed in the electric truck from the user, and the amount of power load according to the driving environment condition and driving environment condition for each electric device. , An electrical device setting unit 132 receiving information such as driving priority during parking for each additional facility, and a notification unit 133 outputting a notification message to a user.

This invention mounts a plurality of battery modules 115 and 116 in an electric truck, and currently, electric devices requiring power supply among a plurality of electric devices (drive motors and a number of additional equipment) installed in the electric truck A power load amount is calculated, and one or a plurality of battery modules among a plurality of battery modules are selected and supplied to the electric devices according to the power load amount.

For example, if the loading weight is heavy, high power must be supplied to the drive motor 111 for driving the electric truck. In this case, both the first module switching unit 117 and the second module switching unit 118 are switched on, and both the first battery module 115 and the second battery module 116 are discharged and the driving motor 111 High power is supplied to the When the loading weight of the electric truck is light, since low power may be supplied to the drive motor 111, the first module switching unit 117 or the second module switching unit 118 is switched off, and the first battery module 115 And only one of the second battery modules 116 is discharged to supply low power to the driving motor 111. Even when only low power is required for the driving motor 111, when power is to be supplied to additional facilities during operation, the first battery module 115 and the second battery module 116 may be controlled to be discharged.

In the parking state of the electric truck, power is not supplied to the drive motor, but power must be supplied to a number of additional facilities. In this case, additional facilities that require power supply vary according to the types of additional facilities and environmental information, and the amount of power load is calculated accordingly. The first battery module 115 or the second battery module 116 is discharged or the first battery module 115 and the second battery module 116 are simultaneously discharged according to the calculated amount of power load. In addition, when the battery power is supplied to a number of additional facilities in the parking state, if all the power of both modules is discharged, the electric truck cannot be operated after the business is closed. Accordingly, in the present invention, when battery power is supplied to additional facilities during parking, the additional facilities supplied with power are appropriately adjusted according to priority among a plurality of additional facilities based on the remaining driving distance.

To this end, the electric device setting unit 132 sets, for the driving motor, a driving environment condition in which the driving motor is driven (when driving), a load power amount according to the load weight, and the like. In addition, the electric device setting unit 132, for each of the additional facilities, the driving environment conditions (when driving, parking, always, depending on the temperature, depending on the illuminance) of the additional facilities, the amount of power load required for the additional facilities, Then, a driving priority or the like is set when the battery power is insufficient.

Hereinafter, an operation of the load-based battery control system of an electric truck according to the present invention will be described with reference to FIG. 2.

The user inputs the day's business hours and driving route to the navigation unit 131 of the smartphone 130, and the power control unit 125 is the user from the navigation unit 131 of the user's smartphone 130 through the communication unit 124. The driving route and business hours information input by is received (S201). Here, the business hours information includes a departure time at which movement starts for business and an arrival time at which movement ends after all business operations.

In addition, for each of the electric devices installed in the electric truck in the electric device setting unit 132 of the smart phone 130, the user may have a driving environment condition, a power load required to drive the electric device, and when the battery power is insufficient. Input the driving priority, etc. of (S202). For example, in the case of a food truck, additional facilities requiring power may include refrigeration facilities, refrigeration facilities, cooking facilities, and lighting facilities. If the business hours are during the summer day, the refrigeration equipment will have a higher priority for operation and the lighting equipment will have lower priority for operation. On the other hand, if the business hours are winter night hours, refrigeration facilities or refrigeration facilities will have a lower priority for driving, and lighting equipment will have a higher priority. In addition, as a driving environment condition of each additional facility, the lighting facility may be set to be automatically driven when the external illuminance is lower than the reference value, and the refrigerating facility or the refrigeration facility may be set to be automatically driven when the external temperature is higher than the reference value. The type of electric device installed in the electric truck, the driving environment conditions for each electric equipment device, and the amount of power load and driving priority at the time of driving may vary depending on the type of products operated by the electric truck, and are preferably set by the user.

The power control unit 125 receives the remaining driving route through the navigation unit 131 of the smart phone 130 and calculates the required driving power required for driving the remaining driving route (S203).

When the user drives the electric truck during business hours (between the departure time and the arrival time) (S204), the power control unit 125 senses the load weight of the electric truck through the sensing unit 123 and adjusts the driving environment conditions for each additional equipment. Accordingly, the additional equipment to be supplied with power and the amount of power load are calculated (S205). It is possible to calculate the amount of power load to be supplied to the driving motor 111 according to the load weight of the electric truck, and when additional equipment that requires constant power supply or power supply during driving is installed, the amount of power load to be supplied to the corresponding additional equipment is calculated. In this way, the power load required for each electric device (driving motor and additional equipment) is calculated, and the first module switching unit 117 and the second module switching unit 118 are controlled according to the calculated power load amount. One of the battery modules 115 and the second battery module 116 is discharged or the two battery modules are discharged at the same time (S206). The power discharged from the battery module is supplied to the driving motor and additional equipment to be supplied with power under the control of the load switching unit 119.

After step S205, the process proceeds to step S203, and the power control unit 125 updates the required driving power required for the remaining driving route.

When the user ends the driving of the electric truck during business hours (between the departure time and the arrival time) and parks (S204), the power control unit 125 controls the load switching unit 119 to cut off the battery power to the driving motor 111 Make it possible (S207).

The power control unit 125 receives the SOC of the first battery module 115 and the second battery module 116 from the BMS 120 and the second BMS 121, and the charging state of each battery module ( The total available power at present is calculated from the SOC), and the available power A for additional facilities that can be used for driving the additional facilities is calculated by subtracting the required driving power obtained in step S203 from the total available power (S208).

In addition, the power control unit 125 detects environmental conditions such as current external temperature and illumination through the sensing unit 123, and calculates the required power B for additional facilities based on the environmental conditions and remaining business hours (S209). . It is preferable that the remaining business hours be the remaining time for the actual user to sell the goods in the food truck in consideration of the current time from the arrival time of the business hours and the travel time required for the remaining driving route. The required power for each additional facility can be calculated in consideration of the current environmental condition and the driving environment condition for each additional facility, and the required power for additional facilities can be calculated by summing them all.

It determines the available power of additional facilities (A) (S210), and if the available power of additional facilities (A) is less than the preset minimum threshold (C), a notification message is transmitted to the user's smartphone 130 and power is supplied to the additional facilities. Is blocked (S211). The notification unit 133 of the user's smartphone outputs a notification message on the screen so that the user can recognize that the additional facilities are stopped due to insufficient power available.

If the power available for additional facilities (A) is greater than the required power for additional facilities (B), since there is enough power available for the additional facilities, all additional facilities that meet the driving environment conditions for each additional facility are selected as additional facilities for power supply. The load amount is calculated (S212). According to the calculated amount of power load, one of the first battery module 115 and the second battery module 116 is discharged by controlling the first module switching unit 117 and the second module switching unit 118 Alternatively, the two battery modules are simultaneously discharged (S214). Power discharged from the battery module is supplied to the additional equipment to be supplied with power under the control of the load switching unit 119.

On the other hand, if the available power (A) of additional facilities is greater than the minimum threshold (C) and less than the required power (B) of additional facilities, the additional facilities to be supplied are selected according to the driving environment conditions and driving priority for each additional facility, and the amount of power load Is calculated (S213). According to the calculated amount of power load, one of the first battery module 115 and the second battery module 116 is discharged by controlling the first module switching unit 117 and the second module switching unit 118 Alternatively, the two battery modules are simultaneously discharged (S214). Power discharged from the battery module is supplied to the additional equipment to be supplied with power under the control of the load switching unit 119.

In the above, the technical idea of the present invention has been described together with the accompanying drawings, but this is illustrative of the best embodiment of the present invention, but does not limit the present invention. In addition, it is a clear fact that anyone of ordinary skill in the art can perform various modifications and imitations without departing from the scope of the technical idea of the present invention.

111: drive motor 112, 113, 114: additional equipment
115, 116: battery module 117, 118: module switching unit
119: load switching unit 120, 121: BMS
122: charger 123: sensing unit
124: communication unit 130: smartphone
131: navigation unit 132: electric device setting unit
133: notification unit

Claims (4)

A plurality of battery modules for outputting power to at least two or more electric devices installed in the electric truck;
A first module switching unit for switching the power of the first battery module among the plurality of battery modules to be discharged or cut off discharge;
A second module switching unit for switching the power of the second battery module among the plurality of battery modules to be discharged or cut off discharge;
A load switching unit configured to selectively supply power discharged from the plurality of battery modules to the electric devices;
A first BMS for sensing a state of charge (SOC) of the first battery module;
A second BMS for sensing a state of charge (SOC) of the second battery module;
A sensing unit that detects environmental information including illumination, temperature, and loading weight;
A communication unit that communicates with the user's smartphone to receive input of a driving route, an operating time, an electric device type, and a driving environment condition for each electric device;
Power is supplied based on the charging status of the first battery module and the second battery module, environmental information detected by the sensing unit, driving route and business hours input from the smartphone, and driving environment condition information for each electric device. The electric device type and the amount of load power are calculated, and the first module switching unit and the second module switching unit are controlled according to the calculated amount of load power to discharge power from at least one of the first battery module and the second battery module. And a power control unit configured to control the load switching unit to supply the discharged power to at least one electric device. The load-based battery control system of an electric truck according to claim 1, further comprising a charger for charging the first battery module and the second battery module. The method of claim 1, wherein the smart phone includes a navigation unit receiving information on a driving route and business hours from a user, and according to a type of electric device installed in the electric truck from the user, a driving environment condition and driving environment condition for each electric device. A load-based battery control system for an electric truck, comprising: an electric device setting unit receiving information such as a power load amount and driving priority for each additional facility; and a notification unit outputting a notification message to a user. The method of claim 1, wherein the power control unit calculates the power available for additional facilities and the power required for additional facilities based on the state of charge of the first battery module and the second battery module, the driving route, and business hours, and the additional facilities are available. A load-based battery control system for an electric truck, characterized in that when the power is less than a preset minimum threshold, a notification message is sent to the smartphone and power supply to the additional equipment is cut off.

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