Battery deformation real-time detection device

Abstract

The utility model discloses a kind of battery deformation real-time detection devices, the detection device includes: detection main body, the light source input mechanism of being arranged in the one end of detection main body, and with the detection processing mechanism of the signal connection of detection main body;Several Bragg grating sections are arranged in the detection main body, several Bragg grating sections are distributed on battery shell surface;The input end of the detection main body is connected with the light source input mechanism, the output end of the detection main body is connected with the detection processing mechanism, forms detection loop. By adhering flexible detection main body with Bragg grating section on battery package shell surface, the quantitative detection of battery bulge condition is carried out, with good detection sensitivity and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, specifically to a real-time battery deformation detection device. Background Technology

[0002] Patent CN222231554U proposes a method to detect the shape of a battery pack by setting a deformation detection structure composed of conductive fibers and a fixing film on the surface of the battery pack. This detection device includes at least one conductive fiber and an insulating fixing film. The conductive fiber is laid on the fixing film in a specific pattern or sandwiched between two layers of the fixing film. When the battery pack deforms due to internal chemical reactions or external impacts, the fixing film stretches or tears, which in turn causes the conductive fiber to deform or break, resulting in a change in its resistance value. The system monitors the change in the resistance value of the conductive fiber in real time through a connected resistance measuring mechanism, and the control unit compares the initial resistance value to determine whether deformation has occurred and its degree, thereby achieving early warning of the battery pack's structural condition. This detection method uses the resistance change caused by the deformation of the conductive fiber as the detection parameter, which is easily affected by external forces, leading to insufficient detection accuracy. Furthermore, the sensitivity of the resistance change caused by the deformation of the conductive fiber is low, which cannot meet the detection requirements for battery overheating and bulging. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a real-time battery deformation detection device, which quantitatively detects battery bulging by attaching a flexible detection body with Bragg grating segments to the surface of the battery pack shell, and has good detection sensitivity and accuracy.

[0004] This utility model provides a real-time battery deformation detection device, the detection device comprising: a detection body, a light source input mechanism disposed at one end of the detection body, and a detection processing mechanism connected to the detection body for signal transmission; The detection body is provided with several Bragg grating segments, which are distributed on the surface of the battery casing. The input end of the detection body is connected to the light source input mechanism, and the output end of the detection body is connected to the detection processing mechanism, forming a detection loop.

[0005] Furthermore, the detection body also includes a flexible substrate, and several Bragg grating segments are disposed within the flexible substrate.

[0006] Furthermore, the flexible substrate is made of PI film or silicone sheet.

[0007] Furthermore, several Bragg grating segments are embedded within the flexible substrate to form an integrated encapsulation structure for the detection body; The detection body can be formed by inserting several Bragg grating segments into slots inside the flexible substrate to create a plug-in mating structure.

[0008] Furthermore, the detection subject forms a compliant attachment morphological structure on the surface of the battery casing.

[0009] Furthermore, the detection body is provided with an adhesive layer, and the detection body is attached to the surface of the battery casing based on the adhesive layer.

[0010] Furthermore, the adhesive layer is made of polyimide tape.

[0011] Furthermore, several Bragg grating segments are configured to be connected in series, or several Bragg grating segments are configured to be connected in parallel.

[0012] Furthermore, several Bragg grating segments are evenly arranged on the side wall surface of the battery casing.

[0013] Furthermore, an optical fiber connection is provided between the light source input mechanism and the detection body.

[0014] This invention provides a real-time battery deformation detection device. By setting a detection body with a strain-sensitive Bragg grating segment and attaching the detection body to the surface of the battery casing, the device can detect the deformation state of the battery casing in real time based on the Bragg grating segment and perform quantitative analysis processing in conjunction with the detection processing mechanism. This can improve the detection sensitivity and accuracy of battery bulging. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the battery deformation real-time detection device in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the detection body in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the detection body in an embodiment of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Figure 1 A schematic diagram of the battery deformation real-time detection device in an embodiment of this utility model is shown. Figure 2 A schematic diagram of the structure of the detection body in an embodiment of this utility model is shown; Figure 3 A cross-sectional view of the detection body in an embodiment of this utility model is shown. The detection device includes: a detection body 1, a light source input mechanism 2 disposed at one end of the detection body 1, and a detection processing mechanism 3 connected to the detection body 1 for signal transmission. The detection body 1 is provided with a plurality of Bragg grating segments 12, which are distributed on the surface of the battery casing 5. The Bragg grating segments 12 have strain sensing effect. When the transmitted light wave signal is transmitted through the Bragg grating segments 12, the reflection center wavelength of the Bragg grating segments 12 has a linear response characteristic to axial strain. When the detection body 1 is attached to the surface of the battery casing 5, the deformation of the battery casing 5 can be reflected in real time by the Bragg grating segments 12, so as to realize the instantaneous detection of the deformation characteristics of the battery casing 5.

[0019] The input end of the detection body 1 is connected to the light source input mechanism 2, and the output end of the detection body 1 is connected to the detection processing mechanism 3, forming a detection loop. The light source input mechanism 2 transmits light wave signals to the detection body 1, so that the Bragg grating segment 12 can detect the deformation state of the battery casing 5 in real time, and output the deformation analysis data of the battery casing 5 through the detection processing mechanism 3, so as to intuitively obtain the operating status of the battery.

[0020] Furthermore, the detection and processing mechanism 3 is equipped with an analysis model corresponding to the change in the reflected wavelength of the Bragg grating segment 12. This model can convert the wavelength and strain calibration relationship of the Bragg grating segment 12 into microscopic deformation variables or stress levels, thereby enabling trend judgment and early warning output of battery health status based on historical data, achieving highly sensitive and accurate detection of the real-time status of the battery.

[0021] Furthermore, the wavelength shift of the Bragg grating segment 12 of the detection body 1 can accurately map the strain changes of the battery, and the output is a continuous analog signal, so that data analysis such as strain quantification, trend analysis and predictive maintenance can be performed in the detection and processing mechanism 3.

[0022] Furthermore, the Bragg grating segment 12 is a grating structure made based on the periodic modulation structure of the refractive index inside the optical fiber. It has the characteristics of small size, light weight, and strong anti-electromagnetic interference ability, and is widely used in the field of health detection structure design.

[0023] Specifically, the detection body 1 also includes a flexible substrate 11, and a number of Bragg grating segments 12 are disposed in the flexible substrate 11. Through the cooperation of the Bragg grating segments 12 and the flexible substrate 11, the detection body 1 can adaptively fit onto the surface of the battery casing 5, so as to improve the detection accuracy of the detection body 1 on the battery casing 5.

[0024] Furthermore, the flexible substrate 11 is made of polyimide film (PI), which has good electrical insulation properties and can meet the usage requirements of the detection subject 1. The flexible substrate 11 can also be made of silicone sheet, which has good insulation and physical support properties.

[0025] Specifically, several Bragg grating segments 12 are embedded in the flexible substrate 11 to form an integrated encapsulation structure for the detection body 1. That is, the Bragg grating segments 12 and the flexible substrate 11 can be integrally formed, so that the Bragg grating segments 12 are embedded in the flexible substrate 11, thereby improving the structural stability of the detection body 1 and providing a good sealed environment for the Bragg grating segments 12 to reduce the risk of detection interference from external ambient light.

[0026] Furthermore, several Bragg grating segments 12 are inserted into slots inside the flexible substrate 11 to form a plug-in mating structure for the detection body 1. Based on the plug-in mating structure design, the Bragg grating segments 12 and the flexible substrate 11 can be quickly installed and replaced, thereby improving the ease of maintenance of the detection body 1 and the ease of assembly between the Bragg grating segments 12 and flexible substrates 11 of different specifications, thus improving the versatility of the detection body 1 in detecting batteries of different specifications.

[0027] Specifically, the detection subject 1 forms a compliant attachment structure on the surface of the battery casing 5 based on the flexible substrate 11. This means the detection subject 1 can adapt to the outer contour of the battery casing 5 and can fit tightly against the outside of the battery casing 5, thereby improving the accuracy of battery detection. By compliantly attaching the detection subject 1 to the surface of the battery pack's metal casing, it can generate strain with minute deformations of the battery surface, causing a linear shift in the grating reflection wavelength, thus constructing a physical sensing channel of "surface strain - light wavelength" to meet the requirements for accurate battery detection.

[0028] Furthermore, the detection body 1 is provided with an adhesive layer 13. The detection body 1 is attached to the surface of the battery casing 5 based on the adhesive layer 13. The detection body 1 is fixed to the surface of the battery casing 5 by the adhesive layer 13. The adhesive layer 13 can be preset on one side of the detection body 1, so that the detection body 1 can be directly attached based on the adhesive layer 13, thereby improving the convenience of the attachment operation of the detection body 1.

[0029] Furthermore, the adhesive layer 13 is made of polyimide tape, which has good electrical insulation properties and improves the electromagnetic interference resistance of the detection body 1.

[0030] Specifically, several Bragg grating segments 12 can be connected in series, which can simplify the internal circuit design of the detection body 1 and reduce the overall cost. By setting multiple Bragg grating segments 12, the area coverage capability of the detection body 1 on the battery casing 5 can be improved to meet the multi-point detection requirements of the detection body 1 on the battery casing 5.

[0031] Furthermore, several Bragg grating segments 12 can be configured to be connected in parallel, so that each Bragg grating segment 12 can form an independent detection point, thereby accurately detecting the heat points of the battery and performing precise analysis and early warning operations on the battery's operating status.

[0032] Specifically, several Bragg grating segments 12 are evenly arranged on the side wall surface of the battery housing 5. These segments can cover the middle and edge areas of the side wall of the battery housing 5, so that the Bragg grating segments 12 can meet the detection requirements of various areas of the battery housing 5.

[0033] Furthermore, several Bragg grating segments 12 can be arranged in an array on the side wall of the battery casing 5 to achieve large-scale detection of the side wall of the battery casing 5.

[0034] Specifically, an optical fiber connection line 4 is provided between the light source input mechanism 2 and the detection body 1. The light source input mechanism 2 transmits optical wave signals to several Bragg grating segments 12 of the detection body 1 through the optical fiber connection line 4 to meet the strain detection requirements of the detection body 1 for the battery.

[0035] The detection device proposed in this embodiment of the utility model is based on a detection body 1 with a Bragg grating segment 12 to detect the expansion and deformation of the battery pack. By attaching a strain-sensitive Bragg grating segment 12 to the surface of the battery casing 5, and combining it with the detection and processing mechanism 3 for analysis, it can achieve high-precision and real-time monitoring of the deformation of the battery caused by thermal effects, gas expansion, aging and other processes. It has excellent sensitivity and anti-interference ability, and at the same time has good system scalability and engineering adaptability, thus improving the accuracy of the detection device for battery pack deformation detection.

[0036] Furthermore, the above description provides a detailed introduction to the real-time battery deformation detection device provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A real-time battery deformation detection device, characterized in that, The detection device includes: a detection body, a light source input mechanism disposed at one end of the detection body, and a detection processing mechanism that is connected to the detection body for signal transmission; The detection body is provided with several Bragg grating segments, which are distributed on the surface of the battery casing. The input end of the detection body is connected to the light source input mechanism, and the output end of the detection body is connected to the detection processing mechanism, forming a detection loop.

2. The real-time battery deformation detection device as described in claim 1, characterized in that, The detection body also includes a flexible substrate, and several Bragg grating segments are disposed within the flexible substrate.

3. The real-time battery deformation detection device as described in claim 2, characterized in that, The flexible substrate is made of PI film or silicone sheet.

4. The real-time battery deformation detection device as described in claim 2, characterized in that, A detection body with several Bragg grating segments embedded in the flexible substrate forms an integrated encapsulation structure. The detection body can be formed by inserting several Bragg grating segments into slots inside the flexible substrate to create a plug-in mating structure.

5. The real-time battery deformation detection device as described in claim 2, characterized in that, The detection subject forms a compliant attachment morphological structure on the surface of the battery casing.

6. The real-time battery deformation detection device as described in claim 1, characterized in that, The detection body is provided with an adhesive layer, and the detection body is attached to the surface of the battery casing based on the adhesive layer.

7. The real-time battery deformation detection device as described in claim 6, characterized in that, The adhesive layer is made of polyimide tape.

8. The real-time battery deformation detection device as described in claim 1, characterized in that, Several Bragg grating segments are configured to be connected in series, or several Bragg grating segments are configured to be connected in parallel.

9. The real-time battery deformation detection device as described in claim 1, characterized in that, Several Bragg grating segments are evenly arranged on the side wall surface of the battery casing.

10. The real-time battery deformation detection device as described in claim 1, characterized in that, An optical fiber connection is provided between the light source input mechanism and the detection body.

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