Battery bump detection device

Abstract

The utility model discloses a battery bump detection device. The battery bump detection device is arranged in a shell of the electric equipment; the battery bump detection device comprises a battery pack and a deformation detection layer, the battery pack is cubic and comprises a first side surface perpendicular to the width direction; the shell comprises a second side face, and the first side face and the second side face are oppositely arranged. The deformation detection layer is arranged between the battery pack and the shell and comprises a third side surface and a fourth side surface which are arranged in parallel in the width direction; wherein the third side surface is in contact with the first side surface, and the fourth side surface is in contact with the second side surface; the deformation detection layer is used for displaying a preset color when the deformation detection layer is extruded by deformation of the first side surface close to the second side surface, so as to monitor bulging of the battery pack. According to the technical scheme provided by the embodiment of the utility model, the battery bump can be timely and accurately detected.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a battery bulging detection device. Background Art

[0002] Lithium-ion batteries are widely used in current electronic products due to their advantages of small size, light weight, large energy density, and rechargeability.

[0003] With the increase in the number of times of use of lithium batteries, the probability of lithium batteries bulging gradually increases. The bulging of the battery will be accompanied by the attenuation of battery performance and may also pose serious risks such as battery explosion. In the prior art, the detection methods for the bulging of lithium batteries include visual inspection and the use of piezoelectric sensors. Among them, the visual inspection method cannot detect the bulging of lithium batteries in time and cannot quantify the degree of bulging, resulting in low accuracy of bulging detection; for the method using piezoelectric sensors, if the device using the lithium battery is shut down for a long time or the lithium battery is in a discharged state for a long time, the relevant detection circuit connected to the piezoelectric sensor cannot be powered to give an early warning of battery bulging. Summary of the Utility Model

[0004] The utility model provides a battery bulging detection device to realize timely and accurate detection of battery bulging.

[0005] According to one aspect of the utility model, a battery bulging detection device is provided, and the battery bulging detection device is arranged inside the housing of an electrical equipment;

[0006] The battery bulging detection device includes:

[0007] A battery pack, which is in a cube shape and includes a first side perpendicular to the width direction; the housing includes a second side, and the first side and the second side are arranged opposite to each other;

[0008] A deformation detection layer is arranged between the battery pack and the housing, and the deformation detection layer includes a third side and a fourth side arranged parallel to each other in the width direction; wherein, the third side is in contact with the first side, and the fourth side is in contact with the second side;

[0009] The deformation detection layer is used to display a preset color when being extruded by the deformation of the first side towards the second side, so as to monitor the bulging of the battery pack.

[0010] Optionally, the deformation detection layer includes a color layer and a color display layer;

[0011] The color layer and the color display layer are stacked in the width direction between the first side surface and the second side surface, and the color layer is in contact with the first side surface, and the color display layer is in contact with the second side surface;

[0012] The color display layer is configured to display the color of the color layer when being squeezed by the first side surface in a direction approaching the second side surface.

[0013] Optionally, the color layer has the preset color.

[0014] Optionally, the color layer is a rigid film layer, and the color display layer includes a semi-transparent elastic film layer; wherein, the light transmittance of the color display layer is related to the thickness of the color display layer.

[0015] Optionally, in a case of not being squeezed, the color display layer has a first thickness; in a case of being squeezed, the color display layer has a second thickness;

[0016] The second thickness is less than the first thickness.

[0017] Optionally, the thickness range of the first thickness includes 0.1 to 10 mm.

[0018] Optionally, the housing includes a transparent outer shell.

[0019] Optionally, the housing includes an opaque outer shell;

[0020] An opening is provided at a preset position of the opaque outer shell, and a transparent cover plate is provided in the opening. The transparent cover plate is configured to seal the opening and display the color of the color layer through the color display layer.

[0021] Optionally, the preset position includes a position on the second side surface corresponding to the center of the first side surface.

[0022] The battery bulge detection device provided by the embodiment of the present utility model includes a battery pack in the shape of a cube, and the battery pack includes a first side perpendicular to the width direction. The battery bulge detection device is arranged inside the housing of the electrical device, and the housing includes a second side, and the first side is arranged opposite to the second side. A deformation detection layer is arranged between the first side and the second side, and the deformation detection layer is closely attached to the battery pack and the housing. When the battery pack bulges, the first side of the battery pack will deform towards the direction close to the second side, thereby squeezing the deformation detection layer. After the deformation detection layer is squeezed, its thickness changes to display a preset color, so that when the electrical device is not working or the battery pack is out of power, the bulge of the battery pack can be indicated in time through the display of the color. In addition, the severity of the bulge of the battery pack can be accurately judged by the chromaticity of the color shown by the deformation detection layer when it is squeezed.

[0023] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of a battery bulge detection device applied to an electrical device according to an embodiment of the present utility model;

[0026] Figure 2 is a schematic cross-sectional structural diagram of a battery bulge detection device along the A-A' direction according to an embodiment of the present utility model;

[0027] Figure 3 is another schematic cross-sectional structural diagram of a battery bulge detection device along the A-A' direction according to an embodiment of the present utility model;

[0028] Figure 4 is another schematic structural diagram of a battery bulge detection device applied to an electrical device according to an embodiment of the present utility model. Detailed Description of the Embodiments

[0029] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] The embodiment of the present utility model provides a battery bulging detection device. Figure 1 FIG. is a schematic structural diagram of a battery bulging detection device provided by an embodiment of the present utility model applied to an electrical device. Figure 2 FIG. is a schematic cross-sectional structural diagram of a battery bulging detection device provided by an embodiment of the present utility model along the A-A' direction. Combining Figure 1 and Figure 2 , the battery bulging detection device 00 is disposed inside the housing 20 of the electrical device. Among them, the electrical device may include a mobile phone, a tablet computer, a notebook computer, a power bank, etc., which is not limited herein. The battery bulging detection device 00 includes: a battery pack 10 and a deformation detection layer 30.

[0032] The battery pack 10 is in a cube shape and includes a first side 11 perpendicular to the width direction; the housing 20 includes a second side 21, and the first side 11 and the second side 21 are disposed opposite to each other; the deformation detection layer 30 is disposed between the battery pack 10 and the housing 20, and the deformation detection layer 30 includes a third side 301 and a fourth side 302 disposed parallel to the width direction; wherein, the third side 301 is in contact with the first side 11, and the fourth side 302 is in contact with the second side 21.

[0033] The deformation detection layer 30 is used to display a preset color when being squeezed by the deformation of the first side 11 towards the second side 21, so as to monitor the bulging of the battery pack 10.

[0034] Exemplarily, the width direction of the battery bulging detection device 00 can be represented by Figure 1 and Figure 2 the X direction in. The battery pack 10 includes a first side surface 11 perpendicular to the width direction. The housing 20 includes a second side surface 21 disposed opposite to the first side surface 11, and there is a certain gap between the second side surface 21 and the first side surface 11.

[0035] A deformation detection layer 30 is disposed in the gap between the first side surface 11 and the second side surface 21. The side of the deformation detection layer 30 close to the battery pack 10 is closely attached to the battery pack 10, and the side of the deformation detection layer 30 close to the housing 20 is closely attached to the housing 20, that is, the third side surface 301 is closely attached to the first side surface 11, and the fourth side surface 302 is closely attached to the second side surface 21. When the first side surface 11 of the battery pack 10 deforms in the direction close to the second side surface 21, that is, when the battery pack 10 bulges in the width direction, the deformation detection layer 30 will be squeezed by the battery pack 10, causing the thickness of the deformation detection layer 30 to change and showing a preset color. By the deformation detection layer 30 showing the corresponding color, even when the electrical device is not working or the battery pack 10 is out of power, it can also indicate in time that the battery pack 10 bulges, so that the staff can timely understand the condition of the battery pack 10 and avoid serious accidents such as explosion of the battery pack 10. Exemplarily, when the deformation detection layer 30 is subjected to different magnitudes of extrusion forces applied by the first side surface 11 of the battery pack 10, it can exhibit different shades of the same color, that is, when the extrusion force received by the deformation detection layer 30 is small and the thickness change of the deformation detection layer 30 is small, the color shown by the deformation detection layer 30 is lighter; and when the extrusion force received by the deformation detection layer 30 is large and the thickness change of the deformation detection layer 30 is large, the color shown by the deformation detection layer 30 is darker. Therefore, through the depth of the color shown by the deformation detection layer 30, the degree of bulging of the battery pack 10 can be quantified, so as to accurately judge the severity of the bulging phenomenon of the battery pack 10.

[0036] The battery bulge detection device provided by the embodiment of the present utility model includes a battery pack in the shape of a cube, and the battery pack includes a first side perpendicular to the width direction. The battery bulge detection device is arranged inside the housing of the electrical device, and the housing includes a second side, and the first side and the second side are arranged opposite to each other. A deformation detection layer is arranged between the first side and the second side, and the deformation detection layer is closely attached to the battery pack and the housing. When the battery pack bulges, the first side of the battery pack will deform towards the direction close to the second side, thereby squeezing the deformation detection layer. After being squeezed, the thickness of the deformation detection layer changes to display a preset color, so that when the electrical device is not working or the battery pack is out of power, the bulge of the battery module can be timely indicated through the display of the color. In addition, the severity of the bulge of the battery pack can be accurately judged by the chromaticity of the color shown when the deformation detection layer is squeezed.

[0037] Optionally, Figure 3 is a schematic cross-sectional structure diagram of another battery bulge detection device provided by the embodiment of the present utility model along the A-A' direction. On the basis of the above embodiment, as Figure 3 shown, the deformation detection layer 30 includes a color layer 31 and a color display layer 32.

[0038] The color layer 31 and the color display layer 32 are stacked along the width direction between the first side 11 and the second side 21, and the color layer 31 is in contact with the first side 11, and the color display layer 32 is in contact with the second side 21; the color display layer 32 is used to display the color of the color layer 31 when being squeezed by the first side 11 towards the direction close to the second side 21.

[0039] Among them, the color layer 31 has a preset color. The color shown when the deformation detection layer 30 is squeezed is the preset color that the color layer 31 itself has. Exemplarily, the preset color can include any one of red, green, blue, yellow, etc., and is not limited here. The color display layer 32 in the deformation detection layer 30 is arranged between the color layer 31 and the housing 20, and the color display layer 32 is closely attached to the second side 21. When the first side 11 of the battery pack 10 deforms towards the direction close to the second side 21, the battery pack 10 squeezes the color display layer 32 through the color layer 31, so that the thickness of the color display layer 32 changes, and the preset color that the color layer 31 itself has can be transmitted through the color display layer 32, that is, when the battery pack 10 bulges, the corresponding preset color of the color layer 31 can be shown, so that the bulge situation of the battery pack 10 can be timely warned through color indication.

[0040] Optionally, based on the above embodiments, the color layer 31 is a rigid film layer, and the color display layer 32 includes a semi-transparent elastic film layer; wherein, the light transmittance of the color display layer 32 is related to the thickness of the color display layer 32.

[0041] Exemplarily, the color layer 31 with a preset color is a rigid film layer. When being extruded by the battery pack 10, the thickness of the color layer 31 will not change and it is only used to display the preset color. The color display layer 32 can be a semi-transparent elastic film layer, that is, the color display layer 32 has a certain elasticity. When being extruded by the deformation of the battery pack 10, the color display layer 32 will deform, causing the thickness of the color display layer 32 to change. Exemplarily, in the case of not being extruded, the color display layer 32 has a first thickness; in the case of being extruded, the color display layer 32 has a second thickness; the second thickness is less than the first thickness. The thickness range of the first thickness includes 0.1 - 10 mm. If the first thickness is too large, the sensitivity of the monitoring effect on the bulging phenomenon of the battery pack 10 is poor, resulting in the inability to timely and accurately monitor the bulging of the battery pack 10, and it will increase the thickness of the battery bulging detection device, restricting the application of the battery bulging detection device; if the first thickness is too small, it may lead to the inability to accurately monitor the severity of the bulging of the battery pack 10.

[0042] The light transmittance of the color display layer 32 is related to the thickness. Specifically, the smaller the thickness of the color display layer 32, the better the light transmittance. That is to say, when the degree of bulging of the battery pack 10 is small, the extrusion force generated by the battery pack 10 on the color display layer 32 is small, so the thickness change of the color display layer 32 is small, that is, the thickness is still large and the light transmittance is poor. At this time, the color of the color layer 31 shown by the battery pack is lighter; when the degree of bulging of the battery pack 10 is large, the extrusion force generated by the battery pack 10 on the color display layer 32 is large, so the thickness change of the color display layer 32 is large, that is, the thickness is small and the light transmittance is good. At this time, the color of the color layer 31 shown by the battery pack is darker. It should be noted that if the color layer 31 is also an elastic film layer, when the battery pack 10 deforms and exerts extrusion on the color layer 31 and the color display layer 32, the extrusion force borne by the two elastic film layers will make the thickness change of the color display layer 32 inaccurate, resulting in a lighter chromaticity of the color shown through the color display layer 32, making it impossible to accurately judge the severity of the bulging of the battery pack 10.

[0043] Optionally, based on the above embodiments, the housing 20 includes a transparent outer shell.

[0044] Exemplarily, the housing 20 of the electrical device can be set as a transparent outer shell. In this way, when the battery pack 10 bulges, the color display layer 32 changes in thickness due to being extruded and clearly shows the preset color of the color layer 31, so as to achieve the effect of warning the bulging of the battery pack 10.

[0045] Optionally, Figure 4 Figure 4 is a schematic structural diagram of another battery bulging detection device provided by an embodiment of the present invention applied to an electrical device. On the basis of the above embodiments, as Figure 4 shown, the housing 20 includes an opaque outer shell.

[0046] An opening 201 is provided at a preset position of the opaque outer shell, and a transparent cover plate is provided in the opening 201. The transparent cover plate is used to seal the opening 201 and display the color of the color layer 31 through the color display layer 32.

[0047] Specifically, for the case where the housing 20 is made of an opaque outer shell, in order to facilitate observing the color displayed by the deformation detection layer 30, an opening 201 can be provided at a preset position on the surface of the opaque outer shell, so that the opening 201 exposes the deformation detection layer 30 inside the housing 20, and a transparent cover plate is used to seal the position of the opening 201 to ensure that the entire housing 20 is still a sealed structure. In this way, when the battery pack 10 bulges and squeezes the color display layer 32, the corresponding preset color can be displayed through the thinned color display layer 32 and at the position of the opening 201, so as to realize the early warning of the bulging image of the battery pack 10. Exemplarily, the preset position includes a position corresponding to the center of the first side on the second side 21. Since the center position of the battery pack 10 corresponding to the first side is the most likely position to bulge, therefore, setting the opening 201 at the position on the surface of the housing 20 corresponding to the center of the first side can timely monitor the bulging situation of the battery pack 10 and play a good early warning role. It should be noted that in Figure 4 it is not convenient to show the transparent cover plate, therefore, Figure 4 the structure of the transparent cover plate is not shown. The shape and size of the opening 201 can be set by the user according to actual needs and are not limited here. Figure 4 shows the situation where when the battery pack 10 bulges, the preset color with a lighter color layer 31 shown by squeezing the color display layer 32 is displayed through the opening 201.

[0048] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A battery bulge detection device, characterized in that: The battery bulge detection device is arranged inside the housing of the electrical equipment; The battery bulge detection device comprises: The battery pack is in a cubic shape and includes a first side surface perpendicular to the width direction; the housing includes a second side surface, and the first side surface is arranged opposite to the second side surface; a deformation detection layer, arranged between the battery pack and the shell, the deformation detection layer comprising a third side surface and a fourth side surface arranged in parallel along a width direction; wherein the third side surface is in contact with the first side surface, and the fourth side surface is in contact with the second side surface; The deformation detection layer is used to display a preset color when the first side surface is squeezed to deform toward the second side surface, so as to monitor the bulging of the battery pack.

2. The battery bulge detection device according to claim 1, characterized in that: The deformation detection layer includes a color layer and a color display layer; The color layer and the color display layer are stacked between the first side surface and the second side surface along the width direction, and the color layer is in contact with the first side surface, and the color display layer is in contact with the second side surface; The color display layer is used for displaying the color of the color layer when the first side surface is pressed in a direction close to the second side surface.

3. The battery bulge detection device according to claim 2, characterized in that: The color layer has the preset color.

4. The battery bulge detection device according to claim 2, characterized in that: The color layer is a rigid film layer, and the color display layer includes a semi-transparent elastic film layer; wherein the light transmittance of the color display layer is related to the thickness of the color display layer.

5. The battery bulge detection device according to claim 4, characterized in that: When not pressed, the color display layer has a first thickness; when pressed, the color display layer has a second thickness; The second thickness is smaller than the first thickness.

6. The battery bulge detection device according to claim 5, characterized in that: The first thickness has a thickness range of 0.1 to 10 mm.

7. The battery bulge detection device according to claim 1, characterized in that: The housing includes a transparent outer shell.

8. The battery bulge detection device according to claim 2, characterized in that: The housing comprises a non-transparent outer shell; An opening is arranged at a preset position of the non-transparent shell, a transparent cover is arranged in the opening, and the transparent cover is used to seal the opening and display the color of the color layer through the color display layer.

9. The battery bulge detection device according to claim 8, characterized in that: The preset position includes a position on the second side surface corresponding to the center of the first side surface.

Images