Pre-charging device, power battery and pre-charging method
A technology of power battery and pre-charging resistor, applied in the direction of electric device, battery/battery traction, charging station, etc., can solve the problems of high cost, easy burning of switches, easy to be burned, etc., to reduce the failure rate and The effect of maintenance cost, extended service life and simple circuit structure
Pending Publication Date: 2021-10-01
山东元齐新动力科技有限公司
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Problems solved by technology
The pre-charging device can limit the charging current of the capacitive load. However, the charging resistor of the pre-charging device is generally selected from the wire-wound resistor of the cement shell or the aluminum profile shell, which is easy to be burned out and the cost is very high.
Although the prior art provides a power supply circuit for electric vehicles, using a relay to control the charging resistor to realize the pre-charging circuit to limit the charging current of the capacitive load of the main circuit, the inventor found that the existing solution cannot limit the capacitive load of other circuits Load current, so there are problems such as on-board charger circuit, switch of DC-DC converter circuit are easy to burn, failure rate of battery pack and high maintenance cost
Method used
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0031] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0032] ...
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The invention belongs to the field of new energy automobiles, and provides a pre-charging device, a power battery and a pre-charging method. The pre-charging device comprises a first switch element, a pre-charging resistor, a second switch element, a first diode and a second diode. One end of the first switch element is connected to the positive electrode of the power battery, the other end of the first switch element is connected to a first load end, and the first load end is a main loop load end; one end of the pre-charging resistor is connected to the connection point of the positive electrode of the power battery and the first switch element, and the other end of the pre-charging resistor is connected in series with the second switch element; the other end of the second switch element is correspondingly connected with a first load end and a second load end through a first diode and a second diode respectively, and the second load end is connected with a vehicle-mounted charger loop and a DC-DC converter loop at the same time.
Description
technical field [0001] The invention belongs to the field of new energy vehicles, and in particular relates to a precharging device, a power battery and a precharging method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Usually, a main switch is connected in series between the load end of the battery pack of a new energy vehicle and the middle of the battery pack. When the main switch is closed, a large current will pass through. In order to avoid the instantaneous large current, a pre-charging circuit needs to be added. The pre-charging device can limit the charging current of the capacitive load. However, the charging resistor of the pre-charging device is generally selected from the wire-wound resistor of the cement shell or the aluminum profile shell, which is easy to be burned out and the cost is very high. Although the prior art ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B60L3/00B60L53/16B60L50/60
CPCB60L3/00B60L53/16B60L50/60B60L2210/10Y02T10/70Y02T10/72Y02T10/7072Y02T90/14
Inventor 史登瑞宋琳王宗明夏宝印孙承金
Owner 山东元齐新动力科技有限公司