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Hybrid construction machinery

A technology of engineering machinery and hybrid power, which is applied in the direction of hybrid vehicles, mechanical equipment, power plants, etc., can solve the problems of heat-affected performance, degradation, etc., and achieve the effect of charging and discharging suppression

Active Publication Date: 2019-03-12
HITACHI CONSTRUCTION MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding these power storage devices, if the battery characteristics such as voltage, current, temperature, and charging rate (hereinafter referred to as SOC) are not used within an appropriate range, thermal influence and performance degradation may be caused

Method used

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no. 2 Embodiment approach

[0096] Regarding the second embodiment of the hybrid type construction machine of the present invention, in addition to the structure of the first embodiment, the output command unit 22F, for example, after a predetermined time has elapsed since the power limitation of the hydraulic pump 17 (as a specific example: 180 seconds), if the voltage, current, temperature, and SOC of the storage device 16 are not within the upper and lower limit ranges, the power of the hydraulic pump 17 and the power of the inverter 15 are limited. In addition, in description of 2nd Embodiment of this invention, the same code|symbol is attached|subjected to the part which is the same as or corresponds to the structure of 1st Embodiment.

[0097] Next, refer to Figure 13 The control processing of the output command unit 22F in the second embodiment of the present invention will be described in detail with reference to the flowchart of FIG. In addition, the control processing of the output command un...

no. 3 Embodiment approach

[0102] Figure 14 It is a figure which shows the internal structure of the rotating body 3 of 3rd Embodiment of this invention in detail.

[0103] The third embodiment of the present invention differs from the first embodiment described above in that the power storage device 16 of the first embodiment has a lithium-ion battery 16A, whereas the power storage device 16 of the second embodiment 26 instead of lithium ion battery 16A such as Figure 14 It has the structure of capacitor 26A as shown. In this case, power storage device 26 is connected to inverter 15 via converter 23 . In addition, in description of 3rd Embodiment of this invention, the same code|symbol is attached|subjected to the part which is the same as or corresponds to the structure of 1st Embodiment.

[0104] Figure 15 The form of the output limitation control based on the determination by the output instruction unit 22F is shown for each combination of the upper and lower limit determination values ​​of the...

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Abstract

The present invention provides a hybrid construction machine capable of properly charging and discharging a power storage device and suppressing engine stop due to a sudden load increase. The present invention has a hybrid power controller (22) that controls the power of the hydraulic pump (17) and the power of the inverter (15) according to the battery characteristics of the power storage device (16). The output of the hybrid power controller (22) The command unit (22F) controls the power of the hydraulic pump (17) and the power of the inverter (15) based on at least one of current and voltage characteristic of the battery, and at least one of temperature and charge rate of the characteristic of the battery. at least one party.

Description

technical field [0001] The present invention relates to a hybrid construction machine including a power storage device for supplying electric power to a motor generator. Background technique [0002] In recent years, in automobiles, hybrid and electric vehicles have become popular from the viewpoint of energy saving, and in construction machinery, hybridization is also advancing. Generally, a construction machine such as a hydraulic excavator driven by a hydraulic system has: a hydraulic pump that can perform maximum load work and can cope with all tasks from light load work to heavy load work; hydraulic work equipment; and large engines that drive hydraulic pumps. [0003] However, in construction machinery, heavy-duty operations such as heavy-duty excavation and loading of sand and soil are frequently carried out by hydraulic operating equipment, which is part of the overall work. Capabilities will be idle. This is one of the main reasons why it is difficult to reduce t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20B60K6/28B60K6/485B60L58/10B60W10/06B60W10/08B60W10/30B60W20/00H02J7/00B60L50/16
CPCB60K6/20B60W10/06B60W10/08B60W20/10B60W2300/17B60W2510/244B60W2510/246B60W2710/086B60K6/28B60K6/485B60L9/18B60W20/13B60L58/12B60L50/16E02F3/30E02F9/2075E02F9/2091H02J7/00Y02T10/62Y02T10/70Y10S903/93B60W10/30B60W20/00Y02E60/10B60W10/26B60W2710/248B60W2710/305B60Y2200/41B60Y2200/92B60L58/14E02F9/2203F15B11/16F15B2211/26
Inventor 高桥智晃井村进也竹内健石田诚司纳谷到日田真史
Owner HITACHI CONSTRUCTION MACHINERY CO LTD