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Main contactor adhesion detection method and device, power battery system, vehicle

A technology for main contactors and power batteries, which is applied to electrical devices, electric vehicles, vehicle components, etc., and can solve problems such as poor experience and prolonging high-voltage power-on time

Active Publication Date: 2020-11-13
铜陵市优车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When implemented by software, the high-voltage power-on time needs to be extended, and the experience is poor

Method used

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  • Main contactor adhesion detection method and device, power battery system, vehicle
  • Main contactor adhesion detection method and device, power battery system, vehicle
  • Main contactor adhesion detection method and device, power battery system, vehicle

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Embodiment Construction

[0063] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0064] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0065] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as any limitation of the application, its application or uses.

[0066] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part...

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Abstract

The embodiment of the invention discloses a main contactor adhesion detection method and device, a power battery system and a vehicle. The method comprises the steps: stable voltage values of direct current buses at the two ends of a power battery when the power battery is in a power-on state are obtained; a power-off instruction is received, the main contactor is controlled to be disconnected according to the power-off instruction, and a drop voltage value after the voltage on a direct-current bus drops is obtained; a discharge curve of the power battery is obtained based on the drop voltagevalue and the stable voltage value, wherein the discharge curve represents the change relation of the voltage value on the direct-current bus with time; whether the main contactor is adhered or not isdetermined based on the discharge curve, adhesion of the main contactor of the power battery is detected in real time, the adhesion state of the contactor in the power battery is accurately judged, and the system safety is improved.

Description

technical field [0001] The present application relates to the technical field of power battery systems, in particular to a main contactor adhesion detection method and device, a power battery system, and a vehicle. Background technique [0002] In the existing power battery system on the market, the power cannot be cut off after the contactor is stuck, resulting in power out of control, damage to the electrical controls in the lightest, and personal injury in the worst case. Therefore, it is necessary to detect the state of the contactor. However, the state of the contactor, especially the detection of the adhesion state when the main contactor controls the connection and disconnection of the high-voltage circuit, is a technical problem. The main contactor adhesion detection method provided by the prior art cannot effectively judge the adhesion state of the main and negative contactors. When it is implemented by hardware, it is necessary to increase the detection points at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00B60L58/10
CPCY02T10/70
Inventor 崔立志朴昌浩沈海寅
Owner 铜陵市优车科技有限公司