CN216208491U

CN216208491U - Battery bulging detection device and battery

Info

Publication number: CN216208491U
Application number: CN202122624023.8U
Authority: CN
Inventors: 曾伟
Original assignee: Metrologic Suzhou Technology Co ltd
Current assignee: Metrologic Suzhou Technology Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-05
Anticipated expiration: 2031-10-29

Abstract

The utility model provides a battery bulging detection device, wherein the battery bulging detection device is in contact with a battery and comprises a shell, a deformation feedback part and a display part, wherein the deformation feedback part and the display part are installed in the shell, the display part is arranged to be capable of displacing towards one direction, and the deformation feedback part is connected with the display part and is arranged to respond to bulging deformation of the battery and push the display part to displace towards the direction.

Description

Battery bulging detection device and battery

Technical Field

The utility model relates to the field of batteries, in particular to a battery bulging detection device and a battery with the same.

Background

Most of the currently used batteries are lithium batteries, and in lithium batteries, especially soft package lithium batteries, the swelling of a lithium battery cell is usually caused by the thickness change of an electrode plate, the oxidative decomposition and gas generation of electrolyte, the poor packaging of the battery and other reasons, and the swelling of the lithium battery may bring a series of safety problems, so that the timely detection of the swelling degree of the lithium battery is particularly important.

Chinese patent application No. CN108063286A discloses a detection apparatus for battery cell bulging, which detects a tensile force of an annular metal band between a first mounting hole and a second mounting hole through a tension sensor, thereby determining whether a cell bulges. In the detection device, an external circuit is required to supply power to the tension sensor, and whether the battery core bulges or not can not be detected when the external circuit does not work.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by one aspect of the present invention is how to detect the degree of swelling of a battery in a purely mechanical manner.

In addition, other aspects of the present invention are directed to solving or alleviating other technical problems in the prior art.

The utility model provides a battery swelling detection device and a battery, and particularly provides, according to one aspect of the utility model:

a battery bulge detection device, wherein the battery bulge detection device is in contact with a battery and comprises a housing and a deformation feedback component and a display component mounted in the housing, the display component being arranged to be displaceable in one direction, the deformation feedback component being connected to the display component and being arranged to urge the display component to be displaced in the direction in response to a bulge deformation of the battery.

Optionally, according to an embodiment of the utility model, the deformation feedback member is configured as a metal dome.

Alternatively, according to an embodiment of the present invention, the metal dome is made of SUS301 stainless steel or ASTM304 stainless steel.

Optionally, according to an embodiment of the utility model, the battery bulge detection device is arranged in a battery housing and the deformation feedback member abuts against a cell of the battery.

Alternatively, according to an embodiment of the present invention, the battery swelling detection device is disposed outside a battery case and the deformation feedback member abuts against the battery case.

Optionally, according to an embodiment of the present invention, a stop member is configured on the housing, the deformation feedback member is configured as a U-shaped member, a bending side of the U-shaped member abuts against the battery cell, one end of the U-shaped member is connected with the display member, and the other end abuts against the stop member.

Optionally, according to an embodiment of the utility model, the display element has markings and/or graduations and/or color coatings, which are designed to correspond to the amount of cell bulging of the battery.

Optionally, according to an embodiment of the present invention, the battery swelling detection device further includes an elastic member, one end of the elastic member is fixed to the housing, and the other end of the elastic member is connected to the display member, and the display member compresses or stretches the elastic member when moved by the deformation feedback member.

Alternatively, according to an embodiment of the present invention, the display member is configured as a rod having one end connected to the deformation feedback member and the other end connected to the elastic member.

Optionally, according to an embodiment of the utility model, a viewing window is configured on the housing for displaying the display component.

According to another aspect of the present invention, there is provided a battery having the battery swelling detection device described above.

According to an embodiment of another aspect of the utility model, when the battery bulge detection device is arranged in a battery housing of the battery, a window is opened in the battery housing for displaying the display member.

The beneficial effects of the utility model include: the stainless steel elastic sheet is adopted to convert the bulging of the battery cell into the displacement of the display component, so that the bulging of the battery can be detected in a purely mechanical mode, and the bulging degree of the battery can be visually displayed through the display component. Need not to supply power to detection device, reduced the cost of detecting the battery inflation to can detect the inflation of battery when the battery is out of work for a long time or the battery is in storage state.

Drawings

The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,

fig. 1 shows a schematic structural view of a proposed battery swelling detection device according to a first embodiment of the present invention;

fig. 2 shows a schematic view of a graduated display member of the proposed battery swelling detection device according to a first embodiment of the present invention;

fig. 3 shows a schematic structural view of a proposed battery swelling detection device according to a second embodiment of the present invention.

Detailed Description

It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structural modes and implementation modes without changing the essential spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and descriptive purposes only and not for purposes of indication or implication as to the relative importance of the respective components.

Referring to fig. 1, there is shown a schematic structural view of a battery swelling detection device 1 according to a first embodiment of the present invention. The battery swelling detection device 1 detects the swelling degree of the battery in a purely mechanical mode and abuts against the battery core 10 of the battery, and when the battery core 10 of the battery does not swell, no interaction force exists between the battery swelling detection device 1 and the battery core 10. The battery swelling detection device 1 may be used to detect the swelling amount of a single battery cell or the total swelling amount of a plurality of battery cells, depending on the arrangement of the battery swelling detection device 1 and the battery cell 10. In the first embodiment, the battery bulge detection device 1 is arranged inside the battery case 11, i.e. between the battery cell 10 and the battery case 11 of the battery, and is separated from the battery case 11 by the case 2. Since the gap between the battery case 11 and the battery cell 10 of a typical lithium battery is small, in the present embodiment, the battery case 11 needs to be processed, for example, a groove capable of accommodating the battery bulge detection device 1 is configured on the battery case 11. Or, when the battery case 11 is manufactured, a large gap is left between the battery case 11 and the battery cell 10 for mounting the battery bulge detecting device 1.

The battery swelling detection device 1 includes a case 2, and a deformation feedback member 3, a display member 4, and an elastic member 5 installed in the case 2. In the embodiment of fig. 1, the deformation feedback member 3 abuts against the battery cell 10. The deformation feedback component 3 is a metal elastic sheet, particularly a stainless steel elastic sheet 3, and the stainless steel elastic sheet 3 can sensitively convert a small load into a large deformation amount and can quickly restore the original shape after the load is removed. Therefore, the bulging of the battery cell 10 can be sensitively detected by the stainless steel spring 3, and the load of the battery cell 10 pressing against it due to the bulging is converted into a large deformation. The stainless steel dome 3 can be made of ASTM304 stainless steel, and particularly can be made of SUS301 stainless steel, which is superior in fatigue strength to ASTM304 stainless steel, so that the stainless steel dome 3 itself can have higher fatigue strength.

In the embodiment of fig. 1, the elastic member 5 is a spring 5, and the display member 4 is configured as a rod 4, one end of the rod 4 is connected with the spring 5, and the other end is connected with the stainless steel spring plate 3. Such a structure can realize that the display member 4 is automatically rebounded by the spring 5 when the amount of bulging deformation of the battery cell 10 decreases. A fixing plate 6 is fixed at the housing 2, the end of the spring 5 not connected with the rod 4 is fixed or abutted against the fixing plate 6, and the end of the spring 5 not connected with the rod 4 can also be directly fixed on the housing 2. The stainless steel spring 3 is configured as a U-shaped piece. The bent side of the U-shaped element abuts against the cell 10, when the cell 10 is not swelled, the bent side of the U-shaped element does not have any interaction force with the cell 10, the upper side of the U-shaped element abuts against the casing 2, and the left end 301 of the U-shaped element is connected to the display component 4. When the cell 10 is inflated and presses against the curved side of the U-shaped member, the two ends 301, 302 of the U-shaped member move to the left and right, respectively, since the upper side of the U-shaped member is against the housing 2 and cannot move. At this point, the left end 301 of the U pushes display member 4 to move to the left, compressing spring 5. In the embodiment of fig. 1, a stop 7 is also fixed to the housing 2, and the right-hand end 302 of the U-shaped piece stops against said stop 7, thereby further limiting the deformation of the stainless steel dome 3 in the direction away from the display part 4, so that the stainless steel dome 3 deforms more in the direction towards the display part 4. Since the stainless steel elastic sheet 3 is connected to the display component 4, i.e. the rod 4, at this time, the stainless steel elastic sheet 3 pushes the display component 4 to move along the bulging direction perpendicular to the battery cell 10, so that the display component 4 compresses the spring 5.

A viewing window 8 is formed on the housing 2, through which window 8 the display element 4, in particular a part of the display element 4, can be seen from outside the housing 2. A transparent glass or plastic is generally mounted on the viewing window 8 to isolate the interior of the detection device 1 from the external environment. In the first embodiment, windows are also configured at respective positions of the battery case so that the display member can be seen from the outside of the battery case. In addition, in order to make it possible to see the degree of swelling of the battery even when the battery is incorporated into an electronic device using the battery, a corresponding viewing window may be opened in a device case of the electronic device accommodating the battery for viewing the display member. Referring to fig. 2, there is shown a schematic view of a graduated display member 4 of the battery swelling detection device 1 according to the first embodiment of the present invention. On said display member 4, i.e. on the rod 4, there are constructed graduations corresponding to the amount of deformation of the battery swelling, the graduations increasing in the direction towards the stainless steel dome 3, and the width of the viewing window 8 needs to be greater than the width between two adjacent marked percentage graduations of the display member 4. It is emphasized that the scale values on the display part 4 show the percentage of swelling of the battery cell 10, i.e., the ratio of the thickness of the swollen portion of the battery cell 10 to the total thickness of the battery cell 10 without swelling. It is generally necessary to handle the swollen cell 10 when the ratio exceeds 8% in order to reduce the safety risk of using the battery.

It should be understood that in an embodiment not shown, instead of the graduation marks, a coloured coating can also be constructed on the display element 4, the coloured coating having a graduated colour corresponding to the amount of deformation of the battery bulge, said colour being progressively darker in the direction towards the stainless steel dome 3. The color of a part of the rod 4 can be seen through the observation window 8, and the darker the seen color is, the larger the displacement of the display element 4 along the direction of compressing the spring 5 is, that is, the larger the deformation amount of the stainless steel elastic sheet 3 is, the larger the deformation amount of the corresponding battery cell 10 is. In addition, other markings that indicate the amount of deformation of the cell 10 that has bulged can also be formed on the display 4.

Therefore, when the battery bulge detection device is installed, the cell thicknesses and the bulge characteristics of different batteries should be calibrated firstly, so as to determine the bulge degrees corresponding to different scales on the display component corresponding to different batteries, and apply different calibrated display components to different batteries.

Referring to fig. 3, there is shown a schematic structural view of a battery swelling detection device 21 according to a second embodiment of the present invention. In the second embodiment, the entire structure of the battery swelling detection device 21 is not changed at all, but the battery swelling detection device 21 is mounted on the outside of the battery case 31. This arrangement is suitable for soft-packed lithium batteries. The battery case 31 of the soft pack lithium battery is soft and easily deformed, so when the battery cell 30 swells, the battery case 31 also swells accordingly. The battery bulge detection device 21 can thus be mounted directly on the outside of the battery case 31 of a soft pack lithium battery, and at this time, the stainless steel spring plate abuts against the battery case 31. When the arrangement is adopted, the structure of the battery itself does not need to be changed, the battery bulging detection device 21 is directly installed outside the soft package lithium battery, and the deformation of the battery cell 30 is detected by detecting the deformation of the battery shell 31. Accordingly, at this time, since the battery swelling detection device 21 and the battery are accommodated in the electronic apparatus as a whole, an observation window for observing the display part of the battery swelling detection device 21 may be opened at a corresponding position of the apparatus case in which the electronic apparatus accommodates the battery and the battery swelling detection device 21.

It should be understood that the battery of the present invention can be used in a variety of applications, such as in electronic devices, automobiles, and energy storage power systems.

It should be understood that all of the above preferred embodiments are exemplary and not restrictive, and that various modifications and changes in the specific embodiments described above, which would occur to persons skilled in the art upon consideration of the above teachings, are intended to be within the scope of the utility model.

Claims

1. A battery bulge detection device, characterized in that battery bulge detection device contacts with the battery to including casing and deformation feedback part and the display element of installing in the casing, the display element sets up to can shift to a direction, deformation feedback part with the display element is connected and is set up to, respond to the bulge deformation of battery, promote the display element to the direction displacement.

2. The battery bulge detection device of claim 1, wherein the deformation feedback member is configured as a metal dome.

3. The battery bulge detection device of claim 2, wherein the metal dome is made of SUS301 stainless steel or ASTM304 stainless steel.

4. The battery bulge detection device according to any one of claims 1 to 3, wherein the battery bulge detection device is arranged in a battery housing and the deformation feedback member abuts against a core of the battery.

5. The battery bulge detection device according to any one of claims 1 to 3, wherein the battery bulge detection device is arranged outside a battery case and the deformation feedback member abuts against the battery case.

6. The battery bulge detection device of claim 4, wherein a stop member is configured on the housing, the deformation feedback member is configured as a U-shaped member, a bending side of the U-shaped member abuts against the battery core, one end of the U-shaped member is connected with the display member, and the other end abuts against the stop member.

7. The battery swelling detection device according to claim 1, wherein said display member has markings and/or graduations and/or color coatings thereon, said markings and/or graduations and/or color coatings being designed in accordance with the amount of cell swelling deformation of said battery.

8. The battery bulge detection device of claim 1, further comprising an elastic member having one end fixed to the housing and the other end connected to the display member, wherein the display member compresses or stretches the elastic member when moved by the strain feedback member.

9. The battery bulge detection device of claim 8, wherein the display member is configured as a rod having one end connected to the deformation feedback member and another end connected to the elastic member.

10. The battery bulge detection device of claim 1, wherein a viewing window is configured on the housing for displaying the display member.

11. A battery having a battery swelling detection device according to any one of claims 1 to 10.

12. The battery of claim 11, wherein when the battery bulge detection device is disposed in a battery housing of the battery, a window is opened in the battery housing for displaying the display member.