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Charge control system

A charge control, charge and discharge technology, applied in the direction of battery temperature control, control device, battery/fuel cell control device, etc., can solve the problems of large battery heat dissipation, battery temperature drop, etc., and achieve the effect of extending the cruising distance

Inactive Publication Date: 2012-01-11
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, depending on the outside air temperature and operating conditions (driving conditions), there may be cases where the heat dissipation of the battery is greater than the heat generation, resulting in a drop in battery temperature.

Method used

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Experimental program
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Effect test

no. 1 approach

[0060] figure 2 It is a diagram showing the configuration of the charging control system according to the first embodiment of the present invention. This charging control system has: an integrated control device 201; a motor control device 202 for controlling the inverter 104 and the motor 103; a battery control device 203 for controlling the battery 105; a battery for controlling the cooling device 106 and the heating device 107 temperature control means 204 ; auxiliary equipment control means 205 for controlling the auxiliary equipment 112 ; and charger control means 206 for controlling the charger 108 . The control devices described above are connected to each other through a communication network provided in the electric vehicle 101 , for example, CAN (Controller Area Network, Controller Area Network).

[0061] exist figure 2 In the charging control system, the inverter 104, the cooling device 106, the heating device 107, the auxiliary equipment 112 and the charger 108...

no. 2 approach

[0103] Next, a charging control system according to a second embodiment of the present invention will be described. The difference between this embodiment and the above-mentioned first embodiment is that in Figure 4 In the second charging mode of step S402, the battery temperature T is controlled so that the battery temperature T becomes the target battery temperature T_target in consideration of the outside air temperature T_out, rather than the charge-discharge allowable battery temperature lower limit T_min. The target battery temperature T_target can be obtained by adding the offset temperature delta_T determined based on the outside air temperature T_out to T_min.

[0104] Figure 9 means that in the charging control system of the second embodiment of the present invention, instead of Figure 7 A flowchart of the processing performed in the second charging mode by the processing of the flowchart. in, Figure 9 in the flow chart with Figure 7 Likewise, for Figure ...

no. 3 approach

[0127] Next, a charging control system according to a third embodiment of the present invention will be described. The difference between this embodiment and the above-mentioned second embodiment is that in Figure 9 In step S902, the offset temperature delta_T is determined according to the predicted load of the battery 105 and the outside air temperature T_out, and the target battery temperature T_target is calculated.

[0128] Figure 13 It is a diagram showing the configuration of a charging control system according to a third embodiment of the present invention. The charging control system and figure 2 Compared with the above, the difference lies in that a vehicle peripheral information acquisition device 1301 and an information communication device 1302 are provided, and an LUT ( Look Up Table, Look Up Table) 1303.

[0129]Vehicle surrounding information acquiring device 1301 is a device that acquires information on road conditions around electric vehicle 101 as veh...

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Abstract

The present invention provides a charge control system. The battery control device 203 detects SOC of a battery 105. Based on the detected SOC, the integrated control device 201 switches between a first charging mode in which the battery 105 is charged at a substantially constant current and a second charging mode in which the battery 105 is charged at a substantially constant voltage. In the second charging mode, the battery temperature control device 204 performs rapid cooling control to control the cooling device 106 such that it has a cooling capacity in the second charging mode higher than a cooling capacity in the first charging mode. Thus, the battery temperature is appropriately controlled to increase a cruising distance even when the electric vehicle is run immediately after completion of charging.

Description

technical field [0001] The present invention relates to a charging control system for an electric vehicle that is mounted on the electric vehicle and controls a charging current of an on-vehicle battery from an external power source. Background technique [0002] An electric vehicle capable of supplying electric power from an external power source generally uses an electric motor as a driving source, and the electric vehicle includes an on-board battery for driving the electric motor. The car battery will generate heat when charging and discharging, causing the battery temperature to rise. However, depending on the outside air temperature and operating conditions (driving conditions), the heat dissipation of the battery may exceed the heat generation, resulting in a drop in battery temperature. [0003] In general, batteries deteriorate when charged and discharged at extremely low temperatures or high temperatures, so a battery temperature range suitable for charging and di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60L11/18H01M10/42H01M10/44H01M10/46H01M10/48H01M10/60H01M10/613H01M10/615H01M10/625H01M10/633H01M10/635H01M10/6571H01M10/6572H01M10/663H02J7/04H02J7/10
CPCH01M10/5006H01M10/44B60L11/1875Y02T90/14B60L2240/662Y02T90/121B60L11/1803Y02T90/16B60L2240/545H01M10/48Y02E60/12Y02T10/7005Y02T10/705B60L11/1874B60L1/003H01M10/5016Y02T10/7088B60L11/1816H01M2220/20Y02T10/7011H01M10/5004H01M10/625H01M10/615H01M10/613B60L50/51B60L58/26B60L58/27Y02T10/70Y02T10/72Y02E60/10B60L3/0046B60L3/04Y02T10/7072
Inventor 稻叶龙田代直之
Owner HITACHI LTD
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