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Battery thermal runaway early warning verification method and device, terminal and storage medium

A verification method and thermal runaway technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems such as vehicle power interruption, improve reliability, reduce false alarm rate, and avoid the risk of thermal runaway The effect of missed detection

Pending Publication Date: 2022-07-29
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention synchronously operates the thermal runaway early warning verification function of the edge and the cloud, realizes cloud-edge collaborative thermal runaway early warning verification through interactive real-time sampling data and verification validity signals, improves the reliability of the edge thermal runaway early warning function, and solves the existing problem False alarms in the battery thermal runaway warning device, and safety issues such as vehicle power interruption caused by false alarms

Method used

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  • Battery thermal runaway early warning verification method and device, terminal and storage medium
  • Battery thermal runaway early warning verification method and device, terminal and storage medium
  • Battery thermal runaway early warning verification method and device, terminal and storage medium

Examples

Experimental program
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Embodiment 1

[0086] see Figure 1-Figure 3 , the embodiment of the present invention provides a battery thermal runaway early warning verification method, the method is used in a terminal, and the method includes the following steps:

[0087] Step 1. Collect the data of the built-in pressure sensor and the data of the external pressure sensor, and diagnose whether the built-in pressure sensor and the external pressure sensor are faulty;

[0088] The invention arranges dual pressure sensors, and adopts different power supply modes and sampling chips for the inside and the outside of the control system respectively, so as to avoid common cause failure.

[0089] The dual pressure sensor can also adopt other sensors for detecting thermal runaway characteristics, such as temperature sensor, smoke sensor, single voltage sensor, etc.;

[0090] Diagnosing faults with the built-in pressure sensor and the external pressure sensor includes:

[0091] (1) Check whether the power supply of the built-i...

Embodiment 2

[0136] In an exemplary embodiment, a battery thermal runaway warning and verification device is also provided, such as Figure 4-Figure 5 As shown, the device includes:

[0137] Sensor diagnosis module, used to diagnose dual sensor drive, sensor reverse wake-up signal, sensor power supply, sensor communication, and sensor sampling;

[0138] The sensor calibration module is used to calibrate the pressure value and the pressure change rate;

[0139] Abnormal wake-up verification module, used for pressure storage before wake-up and pressure verification before and after wake-up;

[0140] The battery data acquisition, calculation and diagnosis module is used to collect and calculate the battery cell voltage, collect and calculate the battery temperature, collect and calculate the battery insulation resistance value and diagnose the sampling fault;

[0141] Cloud-side collaborative thermal runaway early warning verification module is used to interact with cloud-side data and veri...

Embodiment 3

[0148] Image 6 This is a structural block diagram of a terminal provided by an embodiment of the present application, and the terminal may be the terminal in the foregoing embodiment. The terminal 300 may be a portable mobile terminal, such as a smart phone and a tablet computer. The terminal 300 may also be referred to by other names such as user equipment, portable terminal, and the like.

[0149] Generally, the terminal 300 includes: a processor 301 and a memory 302 .

[0150] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 301 may adopt at least one hardware form among DSP (Digital Signal Processing, digital signal processing), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array, programmable logic array) accomplish. The processor 301 may also include a main processor and a co-processor. The main processor is a processor used to proce...

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Abstract

The invention belongs to the technical field of power batteries, and particularly relates to a battery thermal runaway early warning verification method and device, a terminal and a storage medium. According to the invention, redundancy check design is added on identification of key characteristic pressure values of thermal runaway early warning, double pressure sensors are arranged and are respectively arranged inside and outside a control system, different power supply modes and sampling chips are adopted, and common cause failure is avoided; meanwhile, multiple verification modes are added on sensor diagnosis and pressure data, so that the reliability of pressure signals is improved; and a method for verifying changes of other dimensions of the battery is adopted on the thermal runaway early warning feature dimension, so that the false alarm rate is reduced.

Description

technical field [0001] The invention belongs to the technical field of power batteries, in particular to a battery thermal runaway early warning verification method, device, terminal and storage medium. Background technique [0002] Thermal runaway is a key issue in battery safety research, and it is also the focus and difficulty of battery management systems in early warning of battery failures. In order to deal with the safety problems caused by battery thermal runaway, there are also many battery thermal runaway warning methods. There are mainly three types: one is that the battery management system detects the real-time temperature and voltage changes of the battery through temperature sensors and voltage sensors, and from its change trend. Judging the safety state of the battery; one is to establish a thermal model of the battery, and compare the calculation result of the thermal model with the preset value to determine the thermal state of the battery; the other is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/48
CPCH01M10/42H01M10/48H01M10/486
Inventor 张頔刘轶鑫李雪佟丽翠荣常如
Owner CHINA FIRST AUTOMOBILE
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