CN211236165U - Lithium ion battery health state acoustic emission detection system - Google Patents
Lithium ion battery health state acoustic emission detection system Download PDFInfo
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- CN211236165U CN211236165U CN201921466156.3U CN201921466156U CN211236165U CN 211236165 U CN211236165 U CN 211236165U CN 201921466156 U CN201921466156 U CN 201921466156U CN 211236165 U CN211236165 U CN 211236165U
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Abstract
The utility model provides a lithium ion battery health state acoustic emission detecting system, charge and discharge equipment is connected with the lithium ion battery electricity, charges or discharges the lithium ion battery; the acoustic emission sensor is used for receiving an acoustic emission signal inside the lithium ion battery and converting the acoustic emission signal into an electric signal; the processing terminal is electrically connected with the acoustic emission sensor; and the processing terminal is used for receiving the electric signal output by the acoustic emission sensor. The system belongs to non-embedded detection, does not change the internal structure of the lithium ion battery, has simple structure and low cost, and can detect the stress wave of the battery.
Description
Technical Field
The utility model relates to a lithium ion battery technical field, concretely relates to lithium ion battery health status acoustic emission detecting system.
Background
With the development of society, the energy problem is gradually paid attention by each country, and the limited nature of fossil energy makes each country search for healthier and more environment-friendly renewable energy. The lithium ion battery is used as a clean and efficient new energy battery, has obvious advantages compared with other secondary batteries, and is utilized and popularized by various electronic industries. Under the premise of being used in large quantities, the safety and health problems of the lithium ion battery are more emphasized.
The existing lithium ion battery detection technologies are numerous, and mainly comprise three major parts: 1. and (3) detecting electrical parameters: EIS impedance and ampere-hour integral detection are the most common. The EIS impedance detection generates errors when the load fluctuates, the detection time of an ampere-hour integration method is long, and the errors are large. 2. Battery simulation detection: the method comprises the steps of carrying out mathematical modeling according to internal information of the battery, wherein the existing method comprises neural network detection and the like, and judging the approximate fault type of the battery through neural network operation by simulating and inputting corresponding point parameter information of the battery in a certain process. The method has certain reliability, but only simulation prediction is carried out, and the actual situation of the real battery cannot be accurately reflected. 3. Nondestructive testing: the method comprises active excitation nondestructive detection, and more methods are active excitation detection, X-ray detection, infrared detection and the like. However, these detection means are expensive, and active excitation has a certain influence on the battery itself.
Therefore, the applicant provides an acoustic emission detection method for the health state of the lithium ion battery, which utilizes an acoustic emission detection technology to monitor the health state of the lithium ion battery in the charging and discharging processes in real time and analyze the aging and damage conditions of the lithium ion battery in real time, can early warn the damaged battery in advance, and improves the use safety of the lithium ion battery. However, while implementing the above method, the applicant needs to consider how to design a sound emission detection system for health status of a lithium ion battery, which has a simple structure and low cost and can detect stress waves of the battery.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims at providing a lithium ion battery health status acoustic emission detecting system, simple structure, it is with low costs, can detect out the stress wave of battery.
A lithium ion battery state of health acoustic emission detection system, comprising:
charging and discharging equipment: the lithium ion battery is electrically connected with the battery to charge or discharge the lithium ion battery;
an acoustic emission sensor: the acoustic emission signal is used for receiving the acoustic emission signal inside the lithium ion battery and converting the acoustic emission signal into an electric signal;
a processing terminal: the acoustic emission sensor is electrically connected with the acoustic emission sensor; and the processing terminal is used for receiving the electric signal output by the acoustic emission sensor.
Preferably, the method further comprises the following steps:
a conductive splint; the conducting clamping plate comprises an upper clamping piece and a lower clamping piece, wherein the upper clamping piece is arranged close to the upper surface of the lithium ion battery, and the lower clamping piece is arranged close to the lower surface of the lithium ion battery; the conducting clamping plate clamps the lithium ion battery through the upper clamping piece and the lower clamping piece; the acoustic emission sensor is arranged on the upper clamping piece or the lower clamping piece;
the conduction splint is used for conducting the acoustic emission signals inside the lithium ion battery to the acoustic emission sensor.
Preferably, the upper clamping piece and the lower clamping piece are made of aluminum alloy materials.
Preferably, the method further comprises the following steps:
an acoustic emission preamplifier;
the processing terminal with the acoustic emission sensor electricity is connected specifically includes: the acoustic emission sensor is electrically connected with the input end of the acoustic emission preamplifier, and the output end of the acoustic emission preamplifier is electrically connected with the processing terminal;
the acoustic emission preamplifier is used for amplifying the electric signal output by the acoustic emission sensor, converting the electric signal into a digital signal and transmitting the digital signal to the processing terminal.
Preferably, the method further comprises the following steps:
the acoustic emission sensor comprises a differential acoustic emission sensor, a small acoustic emission sensor or a broadband acoustic emission sensor.
Preferably, the method further comprises the following steps:
the processing terminal comprises an acoustic emission instrument.
Preferably, the method further comprises the following steps:
the acoustic emission preamplifier is PXPA series or PXPB series.
The utility model provides a lithium ion battery health status acoustic emission detecting system belongs to non-embedded detection, can not change lithium ion battery's inner structure, can detect out the stress wave of battery, simple structure, and is with low costs.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of the acoustic emission detection system for health status of lithium ion battery provided by the embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Example (b):
a lithium ion battery state of health acoustic emission detection system, see fig. 1, comprising:
charging and discharging device 1: is electrically connected with the lithium ion battery 5 to charge or discharge the lithium ion battery 5;
the acoustic emission sensor 3: the acoustic emission signal is used for receiving the acoustic emission signal inside the lithium ion battery 5 and converting the acoustic emission signal into an electric signal; preferably, the acoustic emission sensor can be a differential acoustic emission sensor, a small acoustic emission sensor or a broadband acoustic emission sensor.
The processing terminal 6: is electrically connected with the acoustic emission sensor 3; the processing terminal 6 is used for receiving the electric signal output by the acoustic emission sensor 3.
Specifically, because the internal material properties or structural properties of a healthy, aged or damaged battery are different, the internal material properties or structural properties of the battery in different health states change, so that stress waves generated by rapid release of strain energy are caused, and acoustic emission signals are formed. Therefore, the acoustic emission signals received by the acoustic emission sensor can reflect the material performance or the structural performance inside the lithium ion battery in real time, and the health state of the lithium ion battery can be obtained by analyzing and judging the acoustic emission signals.
In particular, the processing terminal comprises an acoustic emission instrument. The processing terminal can monitor the acoustic emission signals inside the lithium ion battery in real time so as to judge the health state (such as health, aging or damage) of the lithium ion battery. The detection system belongs to non-embedded detection, does not change the internal structure of the lithium ion battery, and improves the safety of the detection of the lithium ion battery.
Preferably, the method further comprises the following steps:
a conductive splint 2; the conducting clamping plate 2 comprises an upper clamping piece arranged close to the upper surface of the lithium ion battery and a lower clamping piece arranged close to the lower surface of the lithium ion battery; the conducting clamping plate clamps the lithium ion battery through the upper clamping piece and the lower clamping piece; the acoustic emission sensor 3 is arranged on the upper clamping piece or the lower clamping piece; the upper clamping piece and the lower clamping piece are made of aluminum alloy materials, specifically 7-series aluminum alloy materials can be adopted, and the upper clamping piece and the lower clamping piece can also be made of other materials (such as bakelite).
The conduction splint 2 is used for transmitting the acoustic emission signals inside the lithium ion battery to the acoustic emission sensor.
Specifically, the conduction splint is used for fixing the lithium ion battery on the one hand, and the acoustic emission sensor is convenient to install on the other hand, so that the acoustic emission sensor can better collect the acoustic emission signals of the lithium ion battery.
Preferably, the method further comprises the following steps:
an acoustic emission preamplifier 4; the acoustic emission preamplifier is preferably selected from PXPA series or PXPB series.
The processing terminal 6 and the acoustic emission sensor 3 are electrically connected, and specifically include: the acoustic emission sensor 3 is electrically connected with the input end of the acoustic emission preamplifier 4, and the output end of the acoustic emission preamplifier 4 is electrically connected with the processing terminal 6;
the acoustic emission preamplifier 4 is used for amplifying the electric signal output by the acoustic emission sensor, converting the electric signal into a digital signal and transmitting the digital signal to the processing terminal 6.
Specifically, the acoustic emission sensor collects acoustic emission signals inside the lithium ion battery, converts the acoustic emission signals into electric signals and outputs the electric signals to the acoustic emission preamplifier. The acoustic emission preamplifier amplifies the received electric signal, converts the electric signal into a digital signal and outputs the digital signal to the processing terminal. And the processing terminal processes the received digital signal to obtain the health state of the lithium ion battery.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (7)
1. A lithium ion battery state of health acoustic emission detection system, comprising:
charging and discharging equipment: the lithium ion battery is electrically connected with the battery to charge or discharge the lithium ion battery;
an acoustic emission sensor: the acoustic emission signal is used for receiving the acoustic emission signal inside the lithium ion battery and converting the acoustic emission signal into an electric signal;
a processing terminal: the acoustic emission sensor is electrically connected with the acoustic emission sensor; and the processing terminal is used for receiving the electric signal output by the acoustic emission sensor.
2. The lithium ion battery state of health acoustic emission detection system of claim 1, further comprising:
a conductive splint; the conducting clamping plate comprises an upper clamping piece and a lower clamping piece, wherein the upper clamping piece is arranged close to the upper surface of the lithium ion battery, and the lower clamping piece is arranged close to the lower surface of the lithium ion battery; the conducting clamping plate clamps the lithium ion battery through the upper clamping piece and the lower clamping piece; the acoustic emission sensor is arranged on the upper clamping piece or the lower clamping piece;
the conduction splint is used for conducting the acoustic emission signals inside the lithium ion battery to the acoustic emission sensor.
3. The lithium ion battery state of health acoustic emission detection system of claim 2,
the upper clamping piece and the lower clamping piece are made of aluminum alloy materials.
4. The lithium ion battery state of health acoustic emission detection system of claim 1, further comprising:
an acoustic emission preamplifier;
the processing terminal with the acoustic emission sensor electricity is connected specifically includes: the acoustic emission sensor is electrically connected with the input end of the acoustic emission preamplifier, and the output end of the acoustic emission preamplifier is electrically connected with the processing terminal;
the acoustic emission preamplifier is used for amplifying the electric signal output by the acoustic emission sensor, converting the electric signal into a digital signal and transmitting the digital signal to the processing terminal.
5. The lithium ion battery state of health acoustic emission detection system of any one of claims 1-4, further comprising:
the acoustic emission sensor comprises a differential acoustic emission sensor, a small acoustic emission sensor or a broadband acoustic emission sensor.
6. The lithium ion battery state of health acoustic emission detection system of any one of claims 1-4, further comprising:
the processing terminal comprises an acoustic emission instrument.
7. The lithium ion battery state of health acoustic emission detection system of claim 4, further comprising:
the acoustic emission preamplifier is PXPA series or PXPB series.
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| CN201921466156.3U CN211236165U (en) | 2019-09-03 | 2019-09-03 | Lithium ion battery health state acoustic emission detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441707A (en) * | 2019-09-03 | 2019-11-12 | 深圳职业技术学院 | A kind of health state of lithium ion battery acoustic emission detection system and method |
| CN112881915A (en) * | 2021-01-18 | 2021-06-01 | 恒大新能源汽车投资控股集团有限公司 | Fault identification method and device for lithium battery and computer readable storage medium |
| CN113970596A (en) * | 2021-10-12 | 2022-01-25 | 湖南大学 | Stress wave extraction device and method suitable for power device |
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2019
- 2019-09-03 CN CN201921466156.3U patent/CN211236165U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441707A (en) * | 2019-09-03 | 2019-11-12 | 深圳职业技术学院 | A kind of health state of lithium ion battery acoustic emission detection system and method |
| CN112881915A (en) * | 2021-01-18 | 2021-06-01 | 恒大新能源汽车投资控股集团有限公司 | Fault identification method and device for lithium battery and computer readable storage medium |
| CN113970596A (en) * | 2021-10-12 | 2022-01-25 | 湖南大学 | Stress wave extraction device and method suitable for power device |
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