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Pre-charging and voltage supply systems for dc-ac inverters

A voltage supply, DC-DC technology, applied in the field of pre-charging and voltage supply systems, can solve problems such as overheating and deterioration of pre-charging resistor components, and achieve the effect of reducing surge flow

Active Publication Date: 2018-07-17
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the precharge resistor and surrounding parts may be overheated and deteriorated

Method used

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  • Pre-charging and voltage supply systems for dc-ac inverters
  • Pre-charging and voltage supply systems for dc-ac inverters
  • Pre-charging and voltage supply systems for dc-ac inverters

Examples

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Embodiment Construction

[0021] refer to figure 1 , an electric vehicle 10 having a pre-charging and voltage supply system 30 , a DC-AC inverter 40 , a vehicle motor system 50 , and a vehicle controller 52 according to an exemplary embodiment is illustrated. An advantage of the pre-charging and voltage supply system 30 is that the system 30 utilizes the DC-DC voltage converter 120 and the second battery 130 to pre-charge the capacitors in the DC-AC inverter 40, instead of using additional pre-charging contactors and additional the precharge resistor.

[0022] The pre-charging and voltage supply system 30 is provided to pre-charge at least one capacitor in the DC-AC inverter 40 to limit access to the DC-AC inverter from the first battery 60 when the contactor 80 has a closed operating position. 40 surge flow. After the pre-charge operation, the system 30 provides the operating voltage level from the first battery 60 to the DC-AC inverter 40, and sends a control signal to the DC-AC inverter 40 so that...

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Abstract

A precharging and voltage supply system for a DC‑AC inverter is provided. The system includes a first battery having a first anode and a first cathode; and a second battery having a second anode and a second cathode. The system further includes a contactor electrically coupled in series between the first anode and the electrical node. The system further includes a microprocessor that generates a first control signal for causing the DC-DC voltage converter to increase a voltage level between the electrical node and the first cathode. If the voltage level between the electrical node and the first cathode is greater than the threshold voltage level, the microprocessor further generates a second control signal for causing the contactor to transition the contacts to a closed operating position such that the first voltage level is applied to a DC‑AC inverter.

Description

technical field [0001] The present disclosure relates to a pre-charging and voltage supply system for a DC-AC inverter. Background technique [0002] Cross References to Related Applications [0003] This application claims priority to US Nonprovisional Patent Application No. 14 / 221,316, filed March 21, 2014, which is hereby incorporated by reference in its entirety. [0004] Recently, with the active development of electric vehicles, storage batteries, robots, satellites, etc., along with the noticeably increasing demand for portable electronic products such as laptop computers, video cameras, mobile phones, etc., there have been actively Research and development for high-performance secondary batteries capable of repeated charging and discharging are being actively performed. [0005] Currently, nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium secondary batteries, and the like are used as commercial secondary batteries. Among them, lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18H02M1/36H02J7/00H02M7/5375
CPCB60L58/20H02M1/36H02M7/5375H02J2207/20H02J2310/40Y02T10/70B60L58/10Y02T10/72Y02T10/64Y02T10/92Y02T90/12
Inventor 亚历山大·杰弗里·史密斯
Owner LG ENERGY SOLUTION LTD
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