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Storage battery internal state measuring device and soft package lithium ion battery

A lithium-ion battery, internal state technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of difficulty in obtaining real battery information accurately and in a timely manner, and the difficulty of increasing the battery, and achieve small size and wide detection. range, impact reduction effect

Pending Publication Date: 2022-03-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is difficult to obtain the real information of the battery accurately and in a timely manner, which increases the difficulty for better battery management

Method used

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  • Storage battery internal state measuring device and soft package lithium ion battery
  • Storage battery internal state measuring device and soft package lithium ion battery
  • Storage battery internal state measuring device and soft package lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, this embodiment provides an aluminum-plastic film-encapsulated storage battery internal state measurement device, which is packaged inside the battery and communicates with the outside only by optical fibers passing through the aluminum-plastic film, including a communication module, a CPU, a power supply module and A series of sensors, the connections and functions of each module are as follows:

[0034] The input terminal of the communication module is connected with the output terminal of the CPU. When the CPU issues a signal transmission command, the communication module modulates the electrical signal collected by the sensor onto the laser beam emitted by the laser, so that the intensity of the light varies with the amplitude of the electrical signal ( Frequency) changes and is sent out through the optical fiber; at the receiving end, the detector converts the optical signal into an electrical signal after receiving the optical signal, an...

Embodiment 2

[0039] Such as image 3 As shown, this embodiment provides a battery internal state measurement device, the communication module, CPU, power supply module and a series of sensor components included in the device are stacked on a freely bendable flexible circuit board / FPC by welding or other methods On the other hand, when the flexible circuit board / FPC is slightly bent, the measuring device can still maintain its integrity and perform normal functions.

[0040] Such as Figure 4 As shown, the flexible circuit board / FPC is sealed by a waterproof and breathable material expanded polytetrafluoroethylene film (ePTFE), which can prevent the electrolyte from contacting the circuit board and cause a short circuit, and the gas generated inside the battery can still pass through The membrane is thus detected by the sensor.

[0041] During the production of soft-packed lithium-ion batteries, the flexible circuit board / FPC is installed close to the electrode sheet, and then the electro...

Embodiment 3

[0043] An embodiment of the present invention provides a soft-pack lithium-ion battery with a device for measuring the internal state of the battery, and the battery includes the device for measuring the internal state of the battery as in Embodiments 1 and 2.

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Abstract

The invention relates to a storage battery internal state measuring device and a soft package lithium ion battery, the storage battery internal state measuring device is completely packaged in the battery, the device is communicated with the outside only through an optical fiber penetrating through an aluminum plastic film, and the storage battery internal state measuring device specifically comprises a communication module, a central processing unit (CPU) and a power supply module, the communication module is used for transmitting battery internal state information acquired by the sensor module to a battery external controller in an optical fiber communication mode; the input end of the CPU is connected with the output end of the power supply module and the output end of the sensor module, and the CPU is used for receiving the battery internal state information collected by the sensor module and controlling the communication module to transmit information outwards; the input end of the power supply module is connected with the positive and negative tabs of the battery to obtain time-varying voltage, and stable voltage is output by a voltage stabilizer after voltage reduction through an internal DC / DC converter; and the sensor module is used for collecting the internal state information of the battery in real time and sending the information to the CPU. Compared with the prior art, the method has the advantages of high accuracy and timeliness, capability of reducing influence on battery performance, flexibility and the like.

Description

technical field [0001] The invention relates to the field of vehicle battery management, in particular to a storage battery internal state measuring device and a soft pack lithium ion battery. Background technique [0002] At present, lithium-ion batteries are widely used in automobiles, mobile phones, notebook computers and other fields due to their high energy density, clean environmental protection, long cycle life and other advantages. Relatively speaking, the packaging of lithium-ion batteries is divided into two categories, one is metal shell batteries, and the other is soft-pack batteries, that is, soft-pack lithium-ion batteries. Soft-pack lithium-ion batteries have the advantages of good safety performance, light weight, and flexible design, and have good development prospects. [0003] The current battery management system is based on the battery's external state quantities such as surface temperature, terminal voltage, current, etc. to estimate the battery state ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/382G01R31/392H01M10/48H01M10/0525
CPCG01R31/382G01R31/392H01M10/48H01M10/486H01M10/0525Y02E60/10
Inventor 魏学哲蔡吉祥王学远戴海峰
Owner TONGJI UNIV
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