Device and method of detecting precharge function of battery pack

A function detection and battery pack technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of easy outflow, high-voltage components not working normally, easy to miss test items, etc., and achieve good automatic detection effect

CN110221214AActive Publication Date: 2019-09-10SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-09-10

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Abstract

The present invention relates to the field of electric vehicles and provides a device and a method of detecting a precharge function of a battery pack. The device of detecting the precharge function of the battery pack in the present invention comprises: a test unit and a control unit, wherein the control unit is used for connecting the test unit to two ends of the battery pack, such that the battery pack precharges the test unit; and when the time of completing the precharge is smaller than or equal to a preset value, determining that the precharge function of the battery pack is normal. Thepresent invention can automatically detect the precharge function of the battery pack well.
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Description

technical field

[0001] The invention relates to the technical field of electric vehicles, in particular to a battery pack pre-charging function detection device and method. Background technique

[0002] The motor controller of the electric vehicle has a large capacitance in front of the load. During cold start, there is no charge on the capacitor or only a low residual voltage. Inrush current, this inrush current will cause damage to the high-voltage components, causing the high-voltage components to not work normally. The package needs to add a pre-charge function during design, and the capacitor is pre-charged before power-on.

[0003] Existing equipment cannot detect whether the pre-charging resistance value during the assembly process is correct during the battery pack off-line testing process. The status of the pre-charging relay, main positive and main negative relays needs to be manually closed to detect whether there is an adhesion fault, and the test time is long. ...

Examples

Embodiment Construction

[0036] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0037] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0038] figure 1 It is a schematic structural diagram of a battery pack pre-charging function detection device provided by an embodiment of the present invention. Such as figure 1 As shown, the pre-charging function detection device of the battery pack 1 includes: a test unit 2 and a control unit 3, wherein the control unit 3 is used to connect the test unit 2 to both ends of the battery pack 1 to The battery pack 1 is made to precharge the test unit 2, and when the precharging completion time is less than or equal to a preset value, it is judged that the precharging function of the battery pack 1 is normal.

[0039] The control unit 3 of the present invention controls the test u...