Series battery pack and single terminal voltage detection method of series battery pack

A technology of connecting battery packs and detection methods, applied in battery circuit devices, measuring current/voltage, current collectors, etc., to achieve the effects of high real-time performance, small leakage current, and low cost

Inactive Publication Date: 2014-02-05
徐宏
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above sampling methods are not effectively combined with equalization devices

Method used

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  • Series battery pack and single terminal voltage detection method of series battery pack
  • Series battery pack and single terminal voltage detection method of series battery pack
  • Series battery pack and single terminal voltage detection method of series battery pack

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Embodiment Construction

[0035] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] Such as Figure 1-Figure 4 , Figure 6 , Figure 7 As shown, a battery pack in series, including

[0037] The controller sends a control signal to the energy feedback unit and receives the sampled value of the terminal voltage of a single battery sent by the multi-way switch. The controller uses an intelligent MCU or DSP as the main calculation unit.

[0038] The present invention adopts TI's high-speed fixed-point DSP (TMS320F28035) as the main calculation unit;

[0039] The energy feedback unit receives the control signal from the controller and turns on the power tube S1 of one of the energy feedback units. In the present invention, a low-voltage MOS tube (IR...

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PUM

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Abstract

The invention discloses a single terminal voltage detection method of a series battery pack. The method is integrated with a balanced energy feedback device to rapidly detect the single terminal voltage of the series battery pack, so that the balanced energy feedback device has higher response speed, single batteries of the series battery pack are effectively prevented from being overcharged, the safety of the series battery pack is improved, and application prospects are good. The method comprises the following steps that (1), a controller sends open pulses to predetermined energy feedback units, and a power tube is opened; (2), after the proper time delay, a corresponding multi-way switch is opened, and the terminal voltage of a voltage detection winding is sent into the controller; (3), the controller carries out analog-to-digit conversion, and the terminal voltage of the single batteries are calculated according to a certain proportion.

Description

technical field [0001] The invention relates to a battery pack connected in series and a method for detecting voltage at a single terminal thereof, and belongs to the technical field of power electronic equipment. Background technique [0002] Most new energy vehicles use battery packs as their power source, especially pure electric vehicles and plug-in hybrid vehicles. During the daily use of new energy vehicles, the battery pack is in a high-frequency, high-current charging and discharging state. Due to differences in production processes and working environments, there are certain differences between battery cells. With the repeated use of the battery pack, the unbalanced effect of the terminal voltage of the battery pack continues to accumulate, and the single battery with the lowest terminal voltage is prone to overheating. The phenomenon of discharge causes its internal resistance to increase, which in turn affects the normal use of the entire battery pack. Lithium b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00G01R19/00
Inventor 徐宏徐祺越
Owner 徐宏
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