KR20210041192A - Battery Control System for An Electric Road Sweeper - Google Patents

Abstract

The present invention relates to a battery control system which controls the power consumption when an electric road sweeper cleans up a road by considering the moving distance after cleaning the road and the time or distance for guaranteeing the cleaning. According to the present invention, the battery control system for the electric road sweeper comprises: a battery module which outputs power to a movement driving motor and a cleaning driving motor installed on the electric road sweeper; a motor switching unit which controls the power volume provided by the battery module to the movement driving motor and the cleaning driving motor; a BMS which detects the charged status of the battery module; a storage unit which stores the cleaning guarantee distance information; a navigation unit which receives input of a cleaning path and a driving path and receives input of the current position information from a GPS terminal; and a power control unit which calculates a required power volume based on the cleaning path, the driving path, and the cleaning guarantee distance, selects the operation mode to be the driving mode or the cleaning mode, makes the power discharged from the battery module in accordance with the calculated required power volume and the operation mode, controls the motor switching unit, and supplies power to the movement driving motor and/or the cleaning driving motor.

Description

Battery Control System for An Electric Road Sweeper

The present invention relates to a battery control system for an electric road sweeper, and more particularly, to a battery control system for controlling power consumption during road cleaning in consideration of a moving distance after road cleaning and a cleaning guarantee time or distance.

In general, each local government or an agency that manages roads regularly performs cleaning work to remove foreign substances accumulated on roads that are already built and used, and thereby maintains/manages the road surface in a clean state.

In particular, it is very important to treat waste in relation to the aesthetics of the city, and among them, cleaning of roads and roads is very important due to the characteristics of a city where a high population is densely living. The above-described road cleaning work has a large cleaning area, so not only is the efficiency very low when the work is done by relying on manpower, but also because the work is performed in a situation where a vehicle is running around, the risk of accidents is high, so a structure suitable for road cleaning is established. The cleaning work is performed using a vehicle (hereinafter referred to as a'cleaning vehicle') manufactured to have it.

Currently, road sweepers mainly use fossil fuels, but as the need for eco-friendly vehicles is increasing due to recent environmental regulations and oil prices, electric vehicles whose power source is not fossil fuels but electric vehicles are attracting attention. Accordingly, an electric road sweeper equipped with an electric motor is being developed for the road sweeper.

As a prior art of the electric road sweeper, there is Korean Patent Registration No. 10-1669932, "Eco-friendly electric road sweeper capable of interchangeably mounting a container".

1 is a front view of a general electric road sweeper. The electric road sweeper includes a brush unit 100 installed on the vehicle body to separate foreign substances such as fine dust adhered to the floor surface, a suction unit 200 installed on the vehicle body to suck foreign substances on the floor surface, and a suction unit. A separating unit (not shown) for separating foreign matter and air sucked from 200, a filter unit (not shown) that purifies the air separated from the separating unit, and a container 300 for collecting foreign matter separated by the separating unit It consists of. Power is transmitted to the brush unit 100 and the suction unit 200 to clean the road surface. This power is provided by electricity charged in the battery.

2 is a block diagram of an electric device of a general electric road sweeper.

The main controller (6) of the cleaning vehicle is controlled to supply electric energy converted to an appropriate voltage to the actuator (4) for cleaning work and the actuator (5) for vehicle movement by the converter (7), and the battery for electric vehicle (3) is cleaned. And charging and discharging electric power for driving the vehicle. The battery management system (BMS) protects the battery from dangers such as fire or explosion by performing functions of overcharging, overdischarging, and cell balancing. The electric power charged in the battery 3 may be converted by the converter 7 and then provided to the cleaning vehicle electric device.

In this way, the electric road sweeper uses battery charging power for cleaning work and driving the vehicle. Accordingly, if all of the charging power of the battery is used for cleaning, there is no remaining power to move after cleaning, so it may not be possible to move to a rechargeable place. Therefore, it is necessary to secure the power required for the moving distance in advance.

In addition, in the case of an electric road sweeper, the time or distance that can be cleaned with a single charge is set as a specification. If this is not satisfied, a preset cleaning schedule may not be performed, and consumer complaints may be received. Therefore, it is necessary to meet the cleaning time or cleaning distance according to the specification.

Korean Patent Registration No. 1997911 Republic of Korea Patent Registration No. 16 69932

An object of the present invention is to provide a battery control system for controlling power consumption during road cleaning in consideration of a moving distance after road cleaning and a cleaning guarantee time or distance in an electric road sweeper.

A battery control system of an electric road sweeper according to the present invention for achieving the above object includes a battery module that outputs power to a moving drive motor and a cleaning drive motor installed in the electric road sweeper,

A motor switching unit for adjusting an amount of electric power provided to the driving motor for movement and the driving motor for cleaning in the battery module,

A BMS that detects the state of charge of the battery module,

A storage unit for storing information on the cleaning guaranteed distance,

A navigation unit that receives a cleaning route and a driving route and receives current location information from a GPS terminal;

Based on the cleaning route, the driving route, and the cleaning guaranteed distance, the required power amount is calculated, the operation mode is selected as a driving mode or a cleaning mode, and power is discharged from the battery module according to the calculated required power amount and operation mode, and the motor And a power control unit for supplying power to the moving driving motor and/or the cleaning driving motor by controlling the switching unit.

Preferably, the power control unit calculates a minimum required power amount based on the cleaning path and the driving path, detects the battery charge amount of the battery module, calculates an additional available power amount based on the minimum required power amount and the battery charge amount, and , It characterized in that the high-level cleaning is adjusted based on the additional available power.

As described above, according to the present invention, the electric road sweeper can control the amount of power consumption during road cleaning in consideration of the travel distance after road cleaning and the cleaning guarantee time or distance, so that optimal battery discharge management of the electric road sweeper is possible. There are advantages that can be achieved.

1 is a front view of a general electric road sweeper.
2 is a block diagram of an electric device of a general electric road sweeper.
3 is a block diagram of a battery control system of an electric road sweeper according to the present invention.
4 is a flowchart showing the operation of the battery control system of the electric road sweeper according to the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In describing each drawing, similar reference numerals are used for similar elements. Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component.

For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term “and/or” includes a combination of a plurality of related stated items or any of a plurality of related stated items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. Shouldn't.

In order to enhance the effectiveness of road cleaning, the Korea Environment Corporation recommends setting road cleaning cycles by dividing the grade according to the road pollution level, and the Seoul Metropolitan Government has also produced a road cleaning manual to provide regular training for related public officials. Road pollution degree is selected in consideration of traffic volume, road width, floating population, project area size, surface pollution source, land use, and residential density, and road grade and cleaning cycle are set as daily traffic volume. In the road cleaning manual, the road cleaning execution goal, work establishment plan, cleaning period and work time, work method by type of cleaning vehicle, work method by lane (main arterial road, general road, back road, alley, sidewalk), sidewalk cleaning method, It explains the standards for the operation of cleaning water, and sets the target for the frequency of road cleaning by road size for the total roads.

For this reason, road cleaning personnel of each local government decides a cleaning cycle for each road, and schedules a cleaning area for each day based on the distance that can be cleaned once of the road cleaning vehicle to perform road cleaning. However, when the road cleaning vehicle does not satisfy the one-time cleaning guarantee distance, a problem in which the cleaning schedule may be changed may occur.

3 is a block diagram of a battery control system of an electric road sweeper according to the present invention.

An electric road sweeper to which this invention is applied is provided with a moving drive motor 301 for driving and a cleaning drive motor 302 for cleaning. The driving motor 302 for cleaning rotates the brush unit mounted on the electric road sweeper, and causes a suction force to be generated from the suction unit. As the brush unit rotates, the floor surface and the foreign matter are separated, and the suction unit sucks the foreign matter together with the air, and the foreign matter is collected inside the electric road sweeper.

Typically, the electric road sweeper operates in a driving mode and a cleaning mode. When the electric road sweeper moves from the parking lot to the cleaning section or from the cleaning section to the parking lot, it operates in a driving mode, and at this time, only the moving drive motor 301 operates. On the other hand, in the cleaning mode, while the electric road sweeper travels at a low speed through the cleaning section, the brush unit and the suction unit operate to collect foreign substances from the road surface.At this time, the moving drive motor 301 and the cleaning drive motor 302 operate simultaneously. do.

The battery control system for an electric road sweeper according to the present invention includes a plurality of battery modules 304 and 307 outputting power to a moving drive motor 301 and a cleaning drive motor 302 installed in the electric road sweeper, and the plurality of The first module switching unit 305 for switching to discharge or cut off the power of the first battery module 304 among the battery modules of and discharge the power of the second battery module 307 among the plurality of battery modules Alternatively, a second module switching unit 308 for switching to be cut off discharge, and for adjusting the amount of power provided to the moving drive motor 301 and the cleaning drive motor 302 from the plurality of battery modules 304 and 307 A motor switching unit 303, a first BMS 306 for sensing a charging state of the first battery module 304, a second BMS 309 for sensing a charging state of the second battery module 307, A charger 310 for charging the first battery module 304 and the second battery module 307, a storage unit 313 for storing cleaning guarantee distance information and cleanliness level information for each cleaning section, and a cleaning route from a user And a navigation unit 312 that receives a driving route and receives current location information from a GPS terminal, and calculates the required amount of power based on the cleaning route, the driving route, and the cleanliness level of the cleaning section and the cleaning guaranteed distance, and sets the operation mode to the driving mode. Alternatively, the cleaning mode is selected and the first module switching unit 305 and the second module switching unit 308 are controlled according to the calculated required amount of power and the operation mode, so that the first battery module 304 and the second battery module 307 are controlled. ) A power control unit 311 for discharging electric power from at least one battery module and controlling the motor switching unit 303 to supply power to the driving motor 301 for movement and/or the driving motor 302 for cleaning; It includes a display unit 314 that displays information under the control of the power control unit 311.

The power control unit 311 receives a cleaning path to be operated in the cleaning mode and a driving path to be operated in the driving mode, and calculates the minimum required amount of power. In addition, the charging amount of the first battery module 304 and the second battery module 307 is calculated through the first BMS 306 and the second BMS 309. Based on the difference between the minimum required amount of power and the amount of charge, the additional amount of available power in the cleaning mode is calculated. In other words, the minimum required by summing the amount of power required to move from the parking lot to the cleaning section and from the cleaning section to the parking lot, and the amount of power required to clean the entire cleaning path in a low-level (brush part and suction part driven with weak intensity) cleaning mode. Calculate the amount of electricity. Typically, the battery charge amount at the start of cleaning is greater than the minimum required power amount, and the difference between the battery charge amount and the minimum required power amount is calculated as the additional available power amount. A distance that can be cleaned in a high level (a level in which the brush unit and the suction unit are driven with strong intensity) cleaning mode is calculated based on the additional available power amount, and is displayed on the display unit 314.

The electric road sweeper driver can operate in a low-level cleaning mode and a high-level cleaning mode by seeing the cleanliness of the road, and when operating in the high-level cleaning mode, the amount of additional power available is reduced and the distance that can be cleaned in the high-level cleaning mode is also reduced.

The power control unit 311 compares the cleaning path distance input from the navigation unit 312 with the cleaning guarantee distance stored in the storage unit 313, and if the cleaning path distance is less than the cleaning guarantee distance, the difference between the cleaning path distance and the cleaning guarantee distance When the distance is cleaned in the low-level cleaning mode, the required cleaning power amount is calculated, the cleaning power amount is subtracted from the additional available power amount, and then the additional available power amount is recalculated.

4 is a flowchart showing the operation of the battery control system of the electric road sweeper according to the present invention.

The storage unit 313 stores information on the cleaning guarantee distance of the electric road sweeper (S41). The navigation unit 312 receives the cleaning route and the driving route and transmits it to the power control unit 311. Based on this, the power control unit 311 moves from the parking lot to the cleaning section, and cleans and cleans in a low-level cleaning mode in the cleaning section. The minimum required amount of power required to move from the section to the parking lot is calculated (S42).

In addition, the power control unit 311 collects information on the state of charge of the first battery module 304 and the second battery module 307 through the first BMS 306 and the second BMS 309, and calculates the battery charge amount based on this. Do (S43).

The power control unit 311 calculates the amount of guaranteed cleaning power based on the distance of the cleaning path input to the navigation unit 312 and the cleaning guarantee distance stored in the storage unit 313 (S44). If the cleaning path distance is greater than the cleaning guarantee distance, the cleaning guarantee power amount is set to 0, and if the cleaning path distance is less than the cleaning guarantee distance, the amount of power required to clean the difference distance in the low-level cleaning mode is set as the cleaning guarantee power amount.

The power control unit 311 calculates the amount of additional available power based on the battery charge amount, the minimum required power amount, and the cleaning guaranteed power amount (S45). The amount of additional power available is a value obtained by subtracting the sum of the minimum required amount of power and the amount of guaranteed cleaning power from the amount of battery charge. In other words, low-level cleaning is performed with the current battery charge, additionally cleaning the cleaning guarantee distance, and the remaining power is calculated as the additional available power. This additional amount of power available means the amount of power available for high-level cleaning.

Accordingly, the power control unit 311 calculates a high-level cleanable distance based on the additional available power amount (S46), and displays it on the display unit 314.

The driver of the electric road sweeper can drive in a low level cleaning mode on a road with a low pollution level, and drive in a high level cleaning mode on a road with a high level of contamination. When driving in the high-level cleaning mode, the brush unit and the suction unit operate at a high level, so that the road can be cleaned more cleanly. However, since the high-level cleaning mode consumes a large amount of power, battery power is insufficient to operate in the high-level cleaning mode in the entire cleaning period.

In the present invention, the moving distance operating in the high-level cleaning mode is detected and the high-level cleaning possible distance is updated based on the current location (S47). When the high-level cleaning possible distance reaches 0, the high-level cleaning mode is blocked from being driven (S48), so that battery power required for cleaning the remaining cleaning section and moving to the parking lot is secured.

301: drive motor for movement 302: drive motor for cleaning
303: motor switching unit 304: first battery module
305: first module switching unit 306: first BMS
307: second battery module 308: second module switching unit
309: 2nd BMS 310: charger
311: power control unit 312: navigation unit
313: storage unit 314: display unit

Claims (3)

A battery module that outputs power to the driving motor for movement and the driving motor for cleaning installed in the electric road sweeper;
A motor switching unit for adjusting the amount of electric power provided to the driving motor for movement and the driving motor for cleaning in the battery module;
A BMS that detects the state of charge of the battery module,
A storage unit for storing information on the cleaning guaranteed distance,
A navigation unit that receives a cleaning route and a driving route and receives current location information from a GPS terminal;
Based on the cleaning route, the driving route, and the cleaning guaranteed distance, the required power amount is calculated, the operation mode is selected as a driving mode or a cleaning mode, and power is discharged from the battery module according to the calculated required power amount and operation mode, and the motor A battery control system for an electric road sweeper, comprising a power control unit that controls a switching unit to supply power to the moving driving motor and/or the cleaning driving motor. The method of claim 1, wherein the power control unit calculates a minimum required power amount based on the cleaning path and the driving path, detects a battery charge amount of the battery module, and calculates an additional available power amount based on the minimum required power amount and the battery charge amount. And controlling the high-level cleaning based on the additional available power. The method of claim 1, wherein the power control unit calculates a minimum required power amount based on the cleaning path and the driving path, detects the battery charge amount of the battery module, and guarantees cleaning based on the cleaning path distance and the cleaning guarantee distance. A battery control system for an electric road sweeper, comprising: calculating an amount of power, calculating an additional amount of available power based on the minimum required amount of power, an amount of battery charge, and an amount of guaranteed cleaning power, and adjusting high-level cleaning based on the amount of additional available power.

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