KR101906385B1 - Pre heating control apparatus and method of plugin hybrid electric commercial vehicle - Google Patents

Abstract

The present invention relates to a pre-heating integrated control apparatus and a method of a plugin hybrid electric commercial vehicle, wherein the apparatus comprises: a circulation line absorbing heat generated in each battery cell through heat exchange when charging a battery pack by circulating cooling water, and transmitting the absorbed heat to an engine block and a heater core; a circulation pump pumping for the cooling water to be circulated through the circulation line; a control valve installed on the circulation line, and controlling a flow rate of the cooling water; and an integrated control unit controlling operation of the circulation pump, the control valve, and a heater by pre-heating the engine block and the heater core by using heat generated in the battery pack based on a driving condition of a vehicle. Therefore, ignition initial performance in the winter season can be improved by circulating cooling water that absorbs heat generated in a process of charging a battery pack to pre-heat an engine block.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a preheating integrated control apparatus and method for a plug-in hybrid commercial vehicle,

The present invention relates to a preheating integrated control apparatus and method for a plug-in hybrid commercial vehicle, and more particularly, to a preheating integrated control apparatus and method for preheating a block of an engine using heat generated when a battery is charged, And to an apparatus and method for preheating integrated control of a plug-in hybrid commercial vehicle.

Recently, due to environmental problems and rising oil prices, the government is promoting electric vehicle supply policy to replace electric vehicles with electric vehicles.

In general, passenger cars are being mass-produced and sold, and related technologies are being developed in the field of commercial trucks.

Commercial trucks have a large driving load due to system and operating characteristics, and long distance operation is essential.

This makes it possible to reduce the total weight of the vehicle by reducing the capacity of the battery pack by applying the engine and the electric motor to the system at the same time as the pure electric truck rather than the pure electric truck so as to extend the total mileage A plug-in hybrid electric vehicle (PHEV) is suitable.

In order to improve the system efficiency, PHEV commercial vehicle has basically high voltage of about 650V as the base voltage. Due to the undeveloped fast charger, external three-phase power source, which is a commercial power source, On-Board Charger) to boost the voltage to a single phase to charge the battery.

PHEV passenger cars use gasoline engines to improve ride comfort and vibration noise while PHEV commercial vehicles are configured to use diesel engines to reduce fuel costs.

In order to improve the starting performance of cold engine in winter, PHEV commercial vehicle with diesel engine operates fuel filter heater and inline fuel heater using battery power under key on condition.

For example, Patent Document 1 below discloses an indoor cooling / heating apparatus and method using battery charge control of an electric vehicle.

On the other hand, in an electric vehicle or a plug-in hybrid vehicle, as the battery cell generates heat during the battery charging process, a technique of cooling the battery to prevent overheating or damage of the battery cell is applied.

For example, Patent Document 2 below discloses a battery system cooling apparatus and a control method technique of a vehicle.

Korean Patent Registration No. 10-1047413 (issued on July 18, 2011) Korea Patent Registration No. 10-1262461 (issued on May 8, 2013)

The PHEV commercial vehicle to which the diesel engine according to the prior art is applied has a problem in that the start-up is not performed due to rapid voltage drop after two or three start motors operation in conjunction with battery performance degradation due to the temperature drop in winter depending on the charging state of the battery As the phenomenon occurs, there has been a problem in that a high capacity battery is required to be applied more than necessary.

Meanwhile, a PHEV commercial vehicle to which a diesel engine according to the related art is applied charges the battery by driving an alternator after the engine starts, and charges the battery using a charger when the engine is discharged to such an extent that the engine can not be started.

In order to operate the air conditioner or the heater, it takes a long time until the coolant temperature rises after starting the engine. In the PHEV commercial vehicle, since the engine is used for the generator for charging the high voltage battery pack which is not easy to drive the vehicle, .

As a result, the cooling water temperature can not be raised under certain conditions. In particular, in the case of a pure electric vehicle, a PTC heater (Positive Temperature Coefficient Heater) and a heat pump are used in sub-zero weather. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for preheating integrated control of a plug-in hybrid commercial vehicle in which an engine block is preheated by using heat generated during a process of charging a high- .

It is another object of the present invention to provide an apparatus and method for preheating integrated control of a plug-in hybrid commercial vehicle in which the inside of a cab is heated using heat generated upon charging a high voltage battery based on an operation reservation of an air conditioner heater.

Yet another object of the present invention is to provide an apparatus and method for preheating integrated control of a plug-in hybrid commercial vehicle, which can improve the startability of the engine by monitoring the state of charge of the auxiliary battery supplying power to the electrical system, will be.

In order to achieve the above object, the preheating integrated controller of the plug-in hybrid commercial vehicle according to the present invention circulates cooling water to absorb heat generated in each battery cell through heat exchange when charging the battery pack, A circulation pump for circulating the cooling water through the circulation line, a regulating valve installed on the circulation line for regulating the flow rate of the cooling water, and a battery And an integrated controller for controlling driving of the circulation pump, the regulating valve and the heater to preheat the engine block and the heater core using the heat generated in the pack.

In order to achieve the above object, a preheating integrated control method of a plug-in hybrid commercial vehicle according to the present invention comprises the steps of: (a) when a commercial power supply is supplied from an external charging power supply to a high voltage power supply (B) monitoring the charging state of the auxiliary battery for supplying the driving power to the electric field system of the vehicle through the CAN communication in the integrated control unit, and for charging the battery pack to the auxiliary (C) preheating the engine block and the heater core by circulating the cooling water heated by the heat generated in the charging process of the battery pack, and (d) So that the integrated control unit is able to heat up to the indoor set temperature set by the driver through communication Characterized in that it comprises the step of controlling the driving of the emitter.

As described above, according to the apparatus and method for preheating integrated control of a plug-in hybrid commercial vehicle according to the present invention, the engine block is preheated by circulating cooling water that absorbs heat generated during charging the battery pack, It is possible to obtain the effect of improving.

According to the present invention, it is possible to circulate the heat energy generated during battery charging under the engine ignition condition to the air conditioner in accordance with the time reserved by the driver, thereby preheating and heating the interior space in the cab of the vehicle during winter .

According to the present invention, it is possible to monitor the state of the auxiliary battery to maintain the battery condition as a buffer condition, thereby supplying sufficient electric energy to operate the heater and the fuel heater provided in the fuel filter, The manufacturing cost can be reduced by applying the battery of the present invention, and space utilization can be improved by reducing the battery installation space.

1 is a block diagram of a plug-in hybrid commercial vehicle to which a preheating integrated controller according to a preferred embodiment of the present invention is applied;
FIG. 2 is a flowchart illustrating steps of a preheating integrated control method of a plug-in hybrid commercial vehicle according to a preferred embodiment of the present invention.

Hereinafter, an apparatus and method for preheating integrated control of a plug-in hybrid commercial vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a plug-in hybrid commercial vehicle to which a preheating integrated controller according to a preferred embodiment of the present invention is applied.

1, a configuration of a plug-in hybrid commercial vehicle to which a preheating integrated control device according to a preferred embodiment of the present invention is applied will be described in detail.

1, a plug-in hybrid commercial vehicle 10 to which a preheating integrated control device according to a preferred embodiment of the present invention is applied includes a diesel engine 20 for generating driving force by burning fuel supplied from a fuel tank 22 An engine control unit 21 for controlling the driving of the diesel engine 20, a battery pack 31 for charging a high voltage not lower than a predetermined voltage level, an electric motor 30, a built-in charger 32 for boosting an external commercial power source to charge a high-voltage battery provided in the battery pack 31, and an auxiliary battery 23 for supplying driving power to the electric system provided in the vehicle.

The plug-in hybrid commercial vehicle 10 is equipped with a fully automated temperature control (FATC) system that automatically adjusts the flow direction, air flow rate, room temperature, and outdoor air temperature to automatically maintain the indoor space regardless of external conditions. (40) is applied.

The fully automatic temperature control device 40 includes a heater 41 for heating the air, a blowing fan 42 for blowing air to the heater 41, a heater 41, And a temperature control unit 43 for controlling the driving of the fan 42. [

Here, the plug-in hybrid commercial vehicle 10 receives commercial power and charges the high-voltage battery of the battery pack 31, supplies the high-voltage power supplied from the battery pack 31 to the electric motor 30, And a low-voltage section for operating the vehicle's electric field system.

Generally, the voltage of a high-voltage battery applied to a passenger electric vehicle is about 270 to 420 V, and the voltage of a high-voltage battery applied to a commercial vehicle uses a voltage that is boosted up to about 650 V level to improve system efficiency.

The high voltage unit includes a built-in charger 32 for supplying external three-phase commercial power to a high voltage level of about 650 V in a single phase and charging the battery pack 31 with the boosted high voltage power, a battery pack 31, (30).

The low voltage section may include an auxiliary battery 23 charged with a low voltage power of about 24 V, an electric vehicle system of the vehicle driven by the low voltage power supply, an engine control unit 43, and a fully automatic temperature controller 40.

Between the fuel tank 22 and the diesel engine 20 is connected a fuel filter 24 for filtering the fuel supplied to the diesel engine 20 and a fuel heater 24 for heating the fuel, 25 may be provided. Here, the fuel filter 24 may also be provided with a fuel filter heater for heating the fuel.

The battery pack 31 includes a plurality of battery cells constituting a high-voltage battery, and heat is generated by a chemical reaction in each battery cell during a charging process.

Accordingly, the present invention provides a circulation line through which the cooling water circulates along the heater core portion of the battery pack, the engine block, and the air conditioner, and uses the heat generated during the charging process of the battery pack before the vehicle runs to heat the engine block and the heater core portion You can preheat.

The battery pack 31 and the auxiliary battery 23 are connected to a first and a second BMS 34 for performing overcharge, , 26 may be provided.

In addition, the plug-in hybrid hybrid commercial vehicle 10 may be provided with an outside air temperature sensor 11 for sensing the temperature of the outside air flowing from the outside to the inside of the vehicle, and a cooling water temperature sensor 12 for sensing the temperature of the cooling water.

The preheating integrated control device 50 according to the preferred embodiment of the present invention circulates cooling water to absorb heat generated in each battery cell through heat exchange during charging of the battery pack 31, (Hereinafter referred to as " heater core ") of the heater 41 and a circulation line 51 for transferring the heat absorbed by the core portion of the heater 41 A regulating valve 53 installed on the circulation line 51 for regulating the flow rate of the cooling water and a heat exchanger 53 for regulating the flow rate of the cooling water by using the heat generated in the battery pack 31 according to the running condition of the vehicle, And an integrated controller (60) for preheating the core and controlling the driving of the heater (41).

The circulation line 51 is sequentially installed in the battery pack 31, the engine block, and the heater core. The circulation line 51 circulates the cooling water heated by the heat exchange inside the battery pack 31 to transfer heat to the engine block and the heater core Function.

The circulation pump 52 is installed on one side of the circulation line 51 and can be driven in accordance with the control signal of the integration control unit 60.

The regulating valve 53 is provided between the circulating pump 52 and the engine block and includes a first regulating valve 54 and a heater 56 installed in a supply line for supplying cooling water heated by the battery pack 31 to the engine block and the heater core, And a second control valve 55 installed between the engine block 41 and the battery pack 31 and installed in a recovery line for transferring heat to the engine block and the heater core and recovering the cooled cooling water.

The first and second control valves 54 and 55 are operated to open and close in accordance with the control signal of the integrated controller 60 to control the flow rate of the circulating cooling water and prevent backflow.

Between the on-board charger 32 and the auxiliary battery 23, a voltage converter 56 may be provided for converting the high voltage power source to a low voltage level that can be charged in the auxiliary battery 23.

Voltage converter 56 may be provided as a low-voltage DC-DC converter.

The integrated control unit 60 controls the first battery management system 34 provided in the battery pack 31 via the CAN (Controller Area Network) communication line provided in the vehicle, the second battery management system 26 provided in the auxiliary battery 23, The on-board charger 32, the voltage converter 56, the engine control unit 21, and the temperature control unit 43, as shown in Fig.

Therefore, the integrated controller 60 raises the commercial power supplied through the plug 33 to a high voltage of a preset voltage level before driving the vehicle, and drives the on-board charger 32 to charge the high-voltage battery of the battery pack 31 .

When the charging of the high voltage battery is completed, the integrated controller 60 checks the charging state of the auxiliary battery 23 and supplies the voltage to the voltage converter (not shown) so as to charge the auxiliary battery 23 to a preset state of charge 56).

In this way, the integrated controller 60 monitors the state of charge of the auxiliary battery 23 and activates the voltage converter 56 in the case of the insufficient charge amount to control the fuel heater 25 and the fuel filter 24 heater And charging the auxiliary battery to a state where stable power supply for operation of the preheater provided in the intake manifold is possible, the engine startability can be improved.

The integrated control unit 60 also checks the air conditioner heater operation reservation state set by the driver in the winter and detects the operation state of the air conditioner heater in the battery pack 31 based on the temperature sensed by the outside air temperature sensor 11 and the cooling water temperature sensor 12 provided in the vehicle. And controls driving of the circulation pump 52 and the control valve 53 so as to preheat the engine block and the heater core or to heat the indoor space inside the cap to a predetermined indoor set temperature.

Next, a preheating integrated control method of a plug-in hybrid commercial vehicle according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

FIG. 2 is a flowchart illustrating steps of a preheating integrated control method of a plug-in hybrid commercial vehicle according to a preferred embodiment of the present invention.

In step S10 of FIG. 2, the integrated controller 60 checks whether the plug 33 is connected to an external power outlet to supply commercial power, and waits until the commercial power is supplied.

When the commercial power is applied in step S10, the on-board charger 32 boosts the three-phase commercial power supplied from the outside to a single-phase high voltage level of about 650 V and charges the battery pack 31 with the boosted high voltage power.

In step S14, the first battery management system 34 checks the state of charge of the battery pack 31 and controls the steps S12 to S14 to be repeated until the charging of the battery pack 310 is completed.

When the charging of the battery pack is completed, the integrated controller 60 checks whether the auxiliary battery 23 is charged up to a preset charging amount, for example, up to 85%, and drives the voltage converter 56 to charge up to the set charging amount (S16).

When the charging of the auxiliary battery 23 is completed, the integrated controller 60 communicates with the temperature control unit 43 in step S18 to check whether the operation of the heater 41 is reserved in consideration of the running time from the driver do.

If it is determined in step S18 that the heater operation is reserved, the integrated controller 60 controls the driving of the circulation pump 52 and the control valve 53 to transfer heat generated in the battery pack 31 to the heater core during charging And controls the driving of the heater 41 so as to heat the indoor space inside the cab to the indoor set temperature through communication with the temperature control unit 43 (S20).

On the other hand, if it is determined in operation S18 that the operation of the heater 41 is unreserved, the integrated controller 60 checks the temperatures sensed by the outside air temperature sensor 11 and the cooling water temperature sensor 12 provided in the vehicle (S22) . That is, the integrated control unit 60 checks whether the outside air temperature is lower than a predetermined temperature, for example, about -5 [deg.] C, which is a temperature lowering the vehicle startability.

If it is determined in step S22 that the outside air temperature is lower than the limit temperature, the integrated controller 60 controls the circulation pump 52 to transmit the heat generated in the battery pack 31 to the heater core until the outside air temperature becomes the limit temperature or more, And the control valve 53 are controlled.

As described above, as the engine block is preheated by using the heat generated when the battery pack 31 is charged (S24), the present invention can improve the startability of the engine.

Of course, the present invention may be modified to preheat the engine block based on the coolant temperature sensed by the coolant temperature sensor, instead of the ambient temperature sensed by the ambient temperature sensor.

Through the above process, the present invention can improve the startability of the engine by preheating the engine block and the heater core using the heat generated when the battery pack is charged in the plug-in hybrid commercial vehicle.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention is applied to a technology for preheating an engine block and a heater core using heat generated in a battery pack charging process in a plug-in hybrid commercial vehicle and improving the startability of the engine by keeping the auxiliary battery in a buffered state.

10: Plug-in hybrid commercial vehicle
11: ambient temperature sensor 12: coolant temperature sensor
20: Diesel engine 21: Engine control unit
22: fuel tank 23: auxiliary battery
24: fuel filter 25: fuel heater
26: Second battery management system
30: Electric motor 31: Battery pack
32: on-board charger 33: plug
34: first battery management system
40: Fully automatic temperature control device 41: Heater
42: blower fan 43: temperature control unit
50: Preheating integrated control device
51: circulation line 52: circulation pump
53: regulating valve 54: first regulating valve
55: second control valve 56: voltage converter
60:

Claims (5)

A preheating integrated control device for a plug-in hybrid commercial vehicle,
A circulation line for circulating cooling water to absorb heat generated in each battery cell through heat exchange when charging the battery pack and transferring heat absorbed in the engine block and the heater core,
A circulation pump for pumping the cooling water to circulate through the circulation line,
A regulating valve installed on the circulation line and regulating the flow rate of the cooling water and
And an integrated controller for controlling driving of the circulation pump, the regulating valve and the heater so as to preheat the engine block and the heater core using the heat generated in the battery pack based on the driving condition of the vehicle. Integrated heating control unit. The method according to claim 1,
A built-in charger for charging the battery pack by stepping up the external commercial power supply to a high voltage power supply of a predetermined voltage level and
Further comprising a voltage converter installed between the on-board charger and an auxiliary battery for supplying power to an electric system of the vehicle and converting the high voltage power into a low voltage level that can be charged to the auxiliary battery,
Wherein the integrated control unit monitors the state of charge of the auxiliary battery through communication with the battery management system provided in the auxiliary battery and controls the voltage converter to be charged to a predetermined set charge amount when the charged amount is insufficient. Integrated preheating control system for commercial vehicle. The method according to claim 1,
The integrated control unit is communicably connected to the temperature control unit of the fully automatic temperature control device via the CAN communication line provided in the vehicle,
When the charging of the battery pack is completed, the heater operation reservation state set by the driver is checked, and the engine block and the heater core are preheated based on the temperature sensed by the outside air temperature sensor or the cooling water temperature sensor provided in the vehicle. And controls the driving of the circulation pump, the regulating valve and the heater so as to heat up to a preset indoor set temperature. A control method using a preheating integrated control device of a plug-in hybrid commercial vehicle according to any one of claims 1 to 3,
(a) when external commercial power is supplied, charging the battery pack by stepping up to a high voltage power source of a preset voltage level by using the on-board charger,
(b) The integrated control unit monitors the charging state of the auxiliary battery supplying the driving electric power to the electric field system of the vehicle through the CAN communication, and converts the high voltage electric power into a voltage level chargeable in the auxiliary battery Controlling the driving of the voltage converter,
(c) preheating the engine block and the heater core by circulating the cooling water heated by the heat generated in the charging process of the battery pack, and
(d) controlling the driving of the heater so as to heat from the driver to the set indoor temperature through communication in the integrated control unit. 5. The method of claim 4,
In the step (c), the integrated controller checks whether the temperature sensed by the outdoor air temperature sensor or the cooling water temperature sensor provided in the vehicle is lower than the limit temperature at which the engine startability is lowered. If the sensed temperature exceeds the limit temperature, And preheating the engine block by circulating the pre-heating engine.

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