Safety protection device for power battery pack

A technology of safety protection device and power battery pack, applied in emergency protection circuit devices, electric traction, electric vehicles, etc., can solve problems such as safety and hidden dangers, and achieve the effect of preventing personal safety accidents

Active Publication Date: 2011-04-06
FAWER AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention discloses a safety protection device for a power battery pack to solve p

Method used

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  • Safety protection device for power battery pack
  • Safety protection device for power battery pack
  • Safety protection device for power battery pack

Examples

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Embodiment Construction

[0021] An embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 2 As shown, the power battery pack of the present invention is formed by connecting several sub-batteries in series, including a battery management unit BMU, a cascaded joint relay, a cascaded joint controller, and a high-voltage main contactor KM; the cascaded joint relay adopts For magnetic latching relays, each cascaded joint relay has an independent cascaded coil KJAn and an independent joint joint coil KJBn. The cascaded coil KJAn is the cascaded coil of the nth cascaded joint relay, and the joint coil KJBn is the joint coil of the nth cascaded joint relay.

[0023] Such as image 3 As shown, there are two relays KJA, KJB, normally closed contact relay KMB, capacitor C1, and capacitor C2 inside the cascade joint controller; there are two relays KJA and KJB in the cascade controller for interlocking, and the battery The ...

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PUM

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Abstract

The invention discloses a safety protection device for a power battery pack. The device comprises a BMU (battery management unit) and a cascaded cracking relay; the voltage of sub battery packs is less than 36V; the sub battery packs are connected in series, and the cascaded cracking relay is connected between the sub battery packs; the BMU is electrically connected with the cascaded cracking relay; when the battery pack outputs normal working power, the BMU controls a closed cracking relay contact; after any accident or stop, the BMU controls a disconnected cascaded cracking relay contact; and the whole power battery pack becomes a plurality of sub battery packs which are less than 36V safety voltage and are mutually irrelevant. The device has the advantages that: high-voltage output of the battery pack is controlled by only one main contactor in the past is changed, the large battery pack is decomposed into a plurality of sub battery packs, the output voltage of the sub battery packs is in a safe range, and the cascaded cracking safety control can provide safety protection under various working conditions of the power battery pack and prevent personal safety accidents caused by high-voltage electric leakage of the power battery pack.

Description

technical field [0001] The invention belongs to the technical field of automotive electronics, and relates to a safety protection device for a power battery pack; it is especially suitable for the control of the power battery pack of a pure electric passenger car. Background technique [0002] For the power drive system of hybrid HEV and pure electric EV new energy vehicles, the power of the drive motor is very large, often tens of kilowatts. The power supply of the prior art adopts a plurality of battery cells connected in series to form a lithium battery pack, and the voltage of the battery pack connected in series is as high as several hundred volts, which is far beyond the safe voltage range of 36V that the human body can bear. In order to ensure the safe use of batteries and prevent accidental leakage, it is necessary to effectively control the power battery pack. [0003] Known existing power battery pack safety protection device such as attached figure 1 As shown, t...

Claims

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Application Information

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IPC IPC(8): H02H7/18B60L11/18
CPCY02T10/7055Y02T10/7005Y02T10/70
Inventor 孙永乐刘志钢解锟王微张祥武
Owner FAWER AUTOMOTIVE PARTS
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