Battery pack voltage sampling circuit, method and system

A voltage sampling and battery management system technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of low sampling accuracy and poor reliability

Inactive Publication Date: 2019-03-22
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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[0007] The embodiment of the present invention provides a battery pack voltage sampling circuit, method, and s...

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  • Battery pack voltage sampling circuit, method and system
  • Battery pack voltage sampling circuit, method and system

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0023] Considering the existing battery pack voltage sampling circuit, figure 1 is a schematic diagram of a commonly used voltage sampling circuit according to the prior art, such as figure 1 As shown, the commonly used voltage sampling circuit generally calculates the voltage of the battery pack through the principle of resistor voltage division. Such as figure 1 As shown, the battery pack voltage sampling circuit includes five resistors connected in series, which are resistor R1, resistor R2, resistor R3, resistor R4 and resistor R5. If the sampling voltage is U, the corresponding sampling ...

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Abstract

The invention provides a battery pack voltage sampling circuit, method and system. The method comprises the following steps: detecting whether an air conditioner has a preset failure, wherein the preset failure comprises an air return probe failure, an exhaust temperature sensing packet failure, an evaporator outlet pipe temperature sensing packet failure, and evaporator inlet pipe temperature sensing packet failure; under the situation that the air conditioner has the preset failure, acquiring a historical operation record of the air conditioner, wherein the historical operation record is generated according to a preset rule under a normal working state; according to the preset failure and the historical operation record, determining a corresponding preset strategy; and according to preset strategy, controlling the air conditioner to run. According to the method, in the case of failure, the historical operation record generated when the air conditioner works normally is acquired; andaccording to the historical operation record and the preset failure, the corresponding preset strategy is automatically determined to emergently control the air conditioner, so that the technical problems of the prior art that the air conditioner cannot be automatically and accurately correspondingly and effectively controlled in the case of failure can be solved.

Description

technical field [0001] The present invention relates to the technical field of power management systems, in particular to a battery pack voltage sampling circuit, method and system. Background technique [0002] The voltage sampling of the battery pack is an important part of the battery management system (BATTERY MANAGEMENT SYSTEM, referred to as BMS). The voltage is a key indicator to measure the remaining power (State of Charge, referred to as SOC). , it is necessary to sample the voltage of the battery pack at regular intervals; the current commonly used voltage sampling loop (see attached figure 1 Shown) is to directly connect resistors in parallel on the battery pack, and obtain the voltage of the battery pack through the principle of series voltage division of resistors. This sampling method has the following three disadvantages: [0003] 1. The resistance value of the resistors (R1, R2, R3, R4) in the circuit is relatively large, but because they are always connect...

Claims

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Application Information

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IPC IPC(8): G01R31/382G01R31/396
CPCG01R31/382G01R31/396
Inventor 陈勇宋江喜袁金荣胡齐桂黄猛
Owner GREE ELECTRIC APPLIANCES INC
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