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Coupling of high-voltage and low-voltage on-board power systems in terms of energy technology

A technology of energy coupling and on-board power grid, which is applied in the field of motor vehicles and batteries, and can solve problems that have not been widely spread

Active Publication Date: 2020-10-23
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the teaching of DE 102014205650A1 has not been widely disseminated so far

Method used

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  • Coupling of high-voltage and low-voltage on-board power systems in terms of energy technology
  • Coupling of high-voltage and low-voltage on-board power systems in terms of energy technology
  • Coupling of high-voltage and low-voltage on-board power systems in terms of energy technology

Examples

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Embodiment Construction

[0051] The following embodiments relate to applications in land vehicles, such as forklifts, in which it is desired to replace existing lead-acid batteries with lithium-ion batteries. In principle, however, the invention is not limited to this application.

[0052] Batteries are actually used to reversibly store electrical energy. Such batteries are also called accumulators. For the purpose of reversible energy storage, batteries generally comprise a plurality of battery cells which are designed as galvanic cells and which are able to store electrical energy chemically. For this purpose, the respective battery cell usually has two electrodes which are electrochemically connected to each other, for example via an electrolyte which interacts with the electrodes. A direct voltage occurs at the electrodes, which occurs essentially as a result of electrochemical principles. The DC voltage that occurs between the electrodes of the individual battery cells is usually of a relative...

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PUM

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Abstract

The invention relates to a method for operating an energy coupling device (14) that connects a high-voltage vehicle electrical system (16) designed for DC voltage and a low-voltage vehicle electrical system (18) designed for DC voltage in energy technology In terms of coupling, the energy coupling device has a high-voltage energy converter (24) connected to a high-voltage vehicle electrical network (16) and a low-voltage energy converter (26) connected to a low-voltage vehicle electrical network (18), the high-voltage energy converter and A low-voltage energy converter is electrically coupled by means of a DC voltage intermediate circuit (28), wherein the energy converters (24, 26) are controlled by means of a control unit (30), wherein the switching of the energy converters (24, 26) is determined efficiency, and the intermediate circuit direct voltage (32) of the direct voltage intermediate circuit (28) is set according to the overall efficiency formed by the sum of the conversion efficiencies to maximize the overall efficiency.

Description

technical field [0001] The invention relates to an energy coupling device for energy-technically coupling a high-voltage vehicle electrical system designed for DC voltage with a low-voltage vehicle electrical system designed for DC voltage, said energy coupling device having: for coupling energy High-voltage connection for coupling devices to the high-voltage on-board power supply; low-voltage connection for connecting energy coupling devices to the low-voltage on-board power supply; high-voltage energy converter for connection to the high-voltage connection; low-voltage power converter for connection to the low-voltage connection; DC voltage intermediate circuit , the high voltage energy converter and the low voltage energy converter are connected to the direct voltage intermediate circuit to electrically couple the two energy converters; and a control unit for controlling the energy converters. The invention also relates to a battery having a battery housing and at least two...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/02H01M50/528
CPCY02T10/70Y02E60/10H02M3/33584H02M1/007H02M7/04B60L50/50H01M50/528B60L2210/10B60R16/023B60R16/033H02M3/02
Inventor M·辛特伯格B·海伦塔尔A·布鲁姆M·费斯特
Owner AUDI AG