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System for powering the electrical equipment of a motor vehicle via a high-performance battery, corresponding current-limiting device and starter mounted therewith

A technology for electrical equipment and motor vehicles, applied in the field of combination of standard starters and limiting devices, and current limiting devices, which can solve the problems of moving parts and spring collisions, lack of reliability, etc.

Inactive Publication Date: 2017-09-26
VALEO EQUIP ELECTRIC MOTEUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] - the relative lack of reliability caused by the use of semiconductor components and the use of electromechanical relays, moving parts and springs leading to crashes;

Method used

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  • System for powering the electrical equipment of a motor vehicle via a high-performance battery, corresponding current-limiting device and starter mounted therewith
  • System for powering the electrical equipment of a motor vehicle via a high-performance battery, corresponding current-limiting device and starter mounted therewith
  • System for powering the electrical equipment of a motor vehicle via a high-performance battery, corresponding current-limiting device and starter mounted therewith

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Experimental program
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Embodiment Construction

[0043] In a system 1 known in the prior art shown in FIG. 1 for supplying electric power to electrical equipment of a motor vehicle, there is lithium iron phosphate (LiFePO 4 ) technology comprises a negative terminal 3 leading to ground 4 and a positive terminal 5 connected to an on-board network 6 of the vehicle.

[0044] The positive terminal 5 of this battery 2 is also connected by an electric circuit 7 to the electric motor DCM of the starter 8 of the thermal engine of the vehicle and to the alternator 9 driven by this thermal engine.

[0045]Between the positive terminal 5 of the battery 2 and the starter 8, the circuit 7 comprises a first connection comprising a first resistor R1 having a low value of about 1 mΩ, arranged in series with a first switch K1, and a second connection , and the second connection includes a second resistor R2 of about 6 mΩ, arranged in series with the second switch K2.

[0046] Between the positive terminal 5 of the battery 2 and the alternat...

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Abstract

The invention relates to a system for supplying electric power (10) to electrical equipment via a high-performance battery (2) comprising at least one device (LPF) for limiting a current of the high-performance battery. The high-performance battery has a first nominal voltage greater than that of a standard battery initially provided for supplying the equipment, which include an internal combustion engine starter (8) that is connected to the high-performance battery via the limiting device. According to the invention, the limiting device (LPF) is a transformer having a secondary winding circuit (R, W2) formed by a short-circuited secondary winding (W2). According to another feature, the coupling coefficient of the transformer and a secondary resistance of the secondary winding circuit are dependent on the specific characteristics of the equipment.

Description

technical field [0001] In general, the present invention relates to a system for supplying electrical equipment of a motor vehicle with electrical power by means of a high-performance battery, and a corresponding current limiting device. [0002] More particularly, the present invention relates to the combination of a standard starter designed for use with a standard battery of the lead-acid type and a limiting device allowing power to be supplied to the standard by a battery of the lithium-ion type. Starter. Background technique [0003] When power is supplied to the starter to ensure the warm start of the vehicle, a large current demand is generated which is close to the short circuit current of the starter, ie a current of about 1000A. This current demand when power is supplied to the starter then decreases in magnitude as the speed of the starter's armature (corresponding to the machine's rotor) increases. [0004] This initial current spike corresponds to a correspond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02N11/08H02J7/00
CPCF02N11/0862F02N2011/0881F02N2250/02H02J7/00304H02J2207/20F02N11/04F02N11/087F02N15/067H02J7/1492H02H9/002H02J2310/46Y02T10/70B60R16/033
Inventor N.拉贝
Owner VALEO EQUIP ELECTRIC MOTEUR