A two-wire temperature sensor analog circuit

A temperature sensor and analog circuit technology, applied in the field of circuits, can solve problems such as difficulty in complete matching, difficulty in ensuring accuracy, and increased workload, and achieve the effect of solving resistance drift.

Active Publication Date: 2021-08-06
西安盛博飞电子科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the voltage value and internal resistance in the BMS must be known
At the same time, due to the discontinuous resistance of the nominal resistance, it is difficult to completely match the nominal resistance when simulating the resistance corresponding to the temperature point.
Although it is easy to match using a potentiometer, it is difficult to overcome the problem of its resistance drift, making it difficult to guarantee the accuracy of the analog temperature point
Moreover, different BMS manufacturers use different two-wire temperature sensors. When testing BMSs from different manufacturers, it is necessary to replace the matching resistance board, which increases the workload of the test.

Method used

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  • A two-wire temperature sensor analog circuit
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Embodiment Construction

[0033] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0034] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0035] In order to solve the problem that the two-wire temperature sensor is difficult to simulate accurately. In one embodiment of the present invention, a two-wire temperature sensor simulation method is disclosed, such as figure 1 As shown, it is a flowchart of a two-wire temperature sensor si...

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Abstract

The application discloses a two-wire temperature sensor analog circuit, which is applied in the field of circuit technology, including: connecting the digital analog resistor to the battery management system; determining the voltage division of the two-wire temperature sensor to be simulated; adjusting the digital analog resistor so that Its partial pressure is the same as that of the two-wire temperature sensor to be simulated. The method disclosed by the invention can solve the problem that the two-wire temperature sensor is difficult to simulate accurately.

Description

technical field [0001] The invention generally relates to the technical field of circuits, and in particular to a two-wire temperature sensor analog circuit. Background technique [0002] In recent years, with the popularization and application of electric vehicles, the output of electric vehicles and battery packs has also been rising. In the design, production and maintenance of battery packs and complete vehicles, because BMS (Battery Management System, battery management system) involves safety, it is very important for BMS performance evaluation and testing. How to accurately and quickly evaluate and test the performance of BMS is a matter of great concern to the industry. The current power batteries are mainly lithium-ion batteries, including lithium iron phosphate batteries, lithium cobalt oxide batteries and ternary lithium batteries. Since the lithium battery itself generates heat during the internal chemical reaction, it will cause the temperature inside the batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01K7/16
CPCG01K7/16G01R31/00G01R31/007
Inventor 康利平穆吉庆马延俊
Owner 西安盛博飞电子科技有限公司
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