Battery case deformation quantity detection device and battery case deformation quantity control equipment

Abstract

The utility model relates to the technical field of battery manufacturing, and discloses a battery shell deformation quantity detection device and battery shell deformation quantity control equipment. The battery shell deformation quantity detection device comprises a positioning mechanism and a detection mechanism, the positioning mechanism is used for fixing a battery, a detection area is formed on the positioning mechanism, the detection area is used for being arranged corresponding to the side face of a shell of the battery, the detection mechanism and the positioning mechanism are arranged adjacently, and the detection mechanism and the detection area are arranged correspondingly. The detection mechanism is used for detecting the deformation quantity of the side face of the shell. Therefore, the yield of film coating is improved, and the reworking frequency is reduced, so that the productivity of the film coating equipment is improved, and the manufacturing efficiency of the battery is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery manufacturing, and particularly relates to a device for detecting the deformation amount of a battery housing and a device for controlling the deformation amount of a battery housing. Background Art

[0002] A lithium-ion battery is a secondary battery that mainly works by the movement of lithium ions between the positive electrode and the negative electrode. According to the housing classification, lithium-ion batteries can be divided into three categories: steel shell batteries, aluminum shell batteries, and soft-pack batteries. Among them, aluminum shell batteries are widely used in electrical products because of their light weight and better safety performance than steel shell batteries.

[0003] Since the aluminum shell of the aluminum shell battery is relatively soft, affected by the depression state of the aluminum shell material itself and the gas-using processes in the battery manufacturing process, such as the first helium leak detection, formation, liquid injection, helium filling, etc., the depression deformation amount of the aluminum shell is relatively large and the consistency is poor. When the battery is transferred to the film coating process, the film coating rubber roller cannot accommodate the battery with a large depression, that is, the film cannot be smoothly coated at some depressed parts of the battery, resulting in a high film coating defect rate.

[0004] In the related art, it is necessary to manually screen out the batteries with poor film coating, and re-coat the batteries after manually tearing the film and manually cleaning the glue. However, the related art does not solve the problem of low film coating yield, and coupled with the low efficiency of manual film tearing and glue cleaning, the production capacity of the film coating equipment is low, resulting in low battery manufacturing efficiency.

[0005] Therefore, it is urgent to solve the problem of low film coating yield at present. Summary of the Utility Model

[0006] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides a device for detecting the deformation amount of a battery housing and a device for controlling the deformation amount of a battery housing, which improves the film coating yield, reduces the rework frequency, thereby improving the production capacity of the film coating equipment, and further improving the battery manufacturing efficiency.

[0007] The technical effects to be achieved by the utility model are realized through the following aspects:

[0008] In the first aspect, the utility model provides a device for detecting the deformation amount of a battery housing, including:

[0009] A positioning mechanism for fixing the battery, the positioning mechanism is formed with a detection area, and the detection area is used to be correspondingly arranged with the side surface of the battery housing; and

[0010] A detection mechanism, which is arranged adjacent to the positioning mechanism, and the detection mechanism is correspondingly arranged with the detection area, so that the detection mechanism is used to detect the deformation amount of the side surface of the housing.

[0011] In some implementations, the number of the detection areas is multiple, and the multiple detection areas are used to be correspondingly arranged with multiple side surfaces of the battery housing one by one; the detection mechanism includes multiple detection components, and the multiple detection components are correspondingly arranged with the multiple detection areas one by one, and each detection component is used to detect the deformation amount of the corresponding side surface of the housing.

[0012] In some implementations, the detection component includes a mounting member and a detection member, and the detection member is connected to the mounting member; the detection member of each detection component is used to be correspondingly arranged with the corresponding detection area, and the detection member of each detection component is used to detect the deformation amount of the corresponding side surface of the housing.

[0013] In some implementations, the detection component includes multiple detection members, and the multiple detection members are connected to the mounting member at intervals.

[0014] In some implementations, the positioning mechanism is used to fix a square battery, the multiple detection areas are respectively two relatively arranged first detection areas and two relatively arranged second detection areas, the multiple detection components are respectively two first detection components and two second detection components, and the two first detection components are correspondingly arranged with the two first detection areas one by one, and the two second detection components are correspondingly arranged with the two second detection areas one by one.

[0015] In some implementations, the detection mechanism further includes two driving components, and the two first detection components are correspondingly connected to the power output ends of the two driving components, and the driving components are used to drive the first detection components to move along a first direction.

[0016] In some implementations, the battery housing deformation amount detection device further includes a carrier table, the carrier table is provided with a guiding groove along the first direction, and the first detection component is provided with a guiding member, and the guiding member is slidably connected in the guiding groove.

[0017] In some implementations, the first detection component is formed with a connection hole; the driving component includes a driving motor and a lead screw, the lead screw is connected to the output shaft of the driving motor, and the lead screw penetrates through the connection hole along the first direction and is threadedly connected to the first detection component.

[0018] In some implementations, the first detection component includes multiple detection members, and the multiple detection members are connected to the mounting member at intervals along the vertical direction.

[0019] In some implementations, a positioning cavity is formed inside the positioning mechanism, the detection area is located on the side surface of the positioning cavity, and the positioning cavity is used to fix the battery.

[0020] In some implementations, the battery housing deformation detection device further includes a battery standard part, which is used to be fixed in the positioning mechanism, and the side surface of the battery standard part is correspondingly arranged with the detection area.

[0021] In a second aspect, the present utility model provides a battery housing deformation control device, including a liquid injection port docking device and the above-mentioned battery housing deformation detection device, and the liquid injection port docking device is arranged adjacent to the positioning mechanism.

[0022] In some implementations, the liquid injection port docking device includes:

[0023] A gas storage cylinder;

[0024] A conveying pipeline, one end of which is communicated with the gas storage cylinder;

[0025] A switching valve, the input end of which is communicated with the other end of the conveying pipeline; and

[0026] A docking part, the input end of which is communicated with the output end of the switching valve, and the output end of the docking part is used to dock with the liquid injection port of the battery.

[0027] In some implementations, the battery housing deformation control device further includes a control module, which is communicatively connected with the detection mechanism, and the control module is also communicatively connected with the control end of the liquid injection port docking device, so that the control module is used to control the liquid injection port docking device to stop working.

[0028] To sum up, the present utility model has at least the following advantages:

[0029] The battery housing deformation detection device provided by the present utility model, the detection mechanism detects the deformation amount of the side surface of the battery housing through the detection area. When the detection mechanism detects that the deformation amount of the side surface of the housing reaches a preset value, it controls the liquid injection port docking device to stop working to avoid the continuous deformation of the side surface of the battery housing. Since the deformation amount of the side surface of the battery housing is small at this time, the film wrapping rubber roller can be compatible with the deformed part of the side surface of the battery housing, so that the packaging film can be completely attached to the side surface of the housing, improving the yield of film wrapping; due to the high yield of film wrapping, the frequency of manual film tearing, glue cleaning treatment and re-film wrapping is reduced, that is, the frequency of rework is reduced, thereby improving the production capacity of the film wrapping equipment and further improving the manufacturing efficiency of the battery. Description of the Drawings

[0030] Figure 1 It is a structural schematic diagram of a battery housing deformation control device for some embodiments;

[0031] Figure 2 For Figure 1Schematic diagram of the structure of the battery case deformation amount detection device of the battery case deformation amount control device shown;

[0032] Figure 3 is Figure 2 Schematic diagram of the structure of the positioning mechanism of the battery case deformation amount detection device shown;

[0033] Figure 4 is Figure 2 Schematic diagram of the structure of the battery case deformation amount detection device from another perspective shown;

[0034] Figure 5 is Figure 2 Schematic diagram of the partial structure of the battery case deformation amount detection device shown.

[0035] Markings in the figure:

[0036] 10. Battery case deformation amount detection device;

[0037] 100. Positioning mechanism; 101. Detection area; 1011. First detection area; 1012. Second detection area; 102. Positioning cavity; 1021. Positioning opening; 110. Positioning part;

[0038] 200. Detection mechanism; 210. Detection component; 210a. First detection component; 210b. Second detection component; 211. Mounting part; 212. Detection piece; 213. Guide piece; 2101. Connection hole; 220. Driving component; 221. Driving motor; 222. Lead screw;

[0039] 300. Control module;

[0040] 400. Carrier table; 401. Guide groove;

[0041] 20. Battery;

[0042] 500. Side of the case; 510. Large surface; 520. Small surface;

[0043] 30. Liquid injection port docking device;

[0044] 600. Gas storage cylinder;

[0045] 700. Delivery pipeline;

[0046] 800. Switch valve;

[0047] 900. Docking part. Detailed implementation method

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, 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. The described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments.

[0049] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0050] Example 1:

[0051] Please refer to the attached Figure 1 ~attached Figure 3 , the battery housing deformation detection device 10 of the present utility model is used to detect the deformation of the side surface 500 of the housing of the battery 20. The battery housing deformation detection device 10 includes a positioning mechanism 100 and a detection mechanism 200.

[0052] Among them, the positioning mechanism 100 is used to fix the battery 20. The positioning mechanism 100 is formed with a detection area 101, and the detection area 101 is used to be correspondingly arranged with the side surface 500 of the housing of the battery 20, so that the detection mechanism 200 can detect the deformation of the side surface 500 of the housing of the battery 20 through the detection area 101. The detection area 101 is preferably but not limited to a hole. For example, in some other embodiments, the detection area 101 can also be a transparent window.

[0053] The detection mechanism 200 is arranged adjacent to the positioning mechanism 100, and the detection mechanism 200 is correspondingly arranged with the detection area 101, so that the detection mechanism 200 is used to detect the deformation of the side surface 500.

[0054] It can be understood that the liquid injection port docking device 30 is a device for filling gas or liquid into the battery 20, or a device for evacuating gas or liquid inside the battery 20. The liquid injection port docking device 30 can be a helium filling device used in the first helium detection process, a liquid injection device used in the liquid injection process, a vacuum pumping device used in the negative pressure formation process, or a helium filling device used in the helium filling process, etc.

[0055] In this embodiment, the battery 20 is fixed within the positioning mechanism 100. The liquid injection port docking device 30 is docked with the liquid injection port of the battery 20. The liquid injection port docking device 30 fills the battery 20 with gas or liquid through the liquid injection port, or extracts the gas or liquid inside the battery 20 through the liquid injection port. Before the deformation amount detection device 10 of the battery housing detects, a reference value for measurement is set. During the operation of the liquid injection port docking device 30, the gas or liquid inside the battery 20 will gradually decrease or increase, causing the side surface 500 of the battery housing to gradually concave or expand. At this time, the detection mechanism 200 detects the deformation amount of the side surface 500 of the housing through the detection area 101, that is, the difference between the measured value and the reference value. When the detection mechanism 200 detects that the deformation amount of the side surface 500 of the housing reaches the preset value, the liquid injection port docking device 30 is controlled to stop working to prevent the battery 20 from deforming further, that is, to prevent the battery 20 from further concave or expanding. At this time, the deformation amount of the side surface 500 of the battery housing is small, so the film wrapping roller can be compatible with the deformed part of the side surface of the battery housing, enabling the packaging film to be completely attached to the side surface 500.

[0056] It can be understood that the preset value can be adjusted according to different specifications of the battery 20, but it is necessary to ensure that the deformed part of the side surface 500 of the battery housing can be compatible with the film wrapping roller. For example, in some embodiments, for the detection of the square battery 20, the square battery 20 has multiple side surfaces 500 of the housing, and the multiple side surfaces 500 are respectively two relatively arranged large surfaces 510 and two relatively arranged small surfaces 520. The preset values of the large surface 510 and the small surface 520 are different. The preset value of the large surface 510 is 0 ± 0.8 mm, and the preset value of the small surface 520 is ≥ -0.12 mm and ≤ 0 mm. When the deformation amount of the side surface 500 is negative, the detection point corresponding to the side surface 500 is in a concave state, and when the deformation amount of the side surface 500 is positive, the detection point corresponding to the side surface 500 is in an expanded state. When the deformation amounts of the large surfaces 510 and the small surfaces 520 of the square battery 20 all reach within the preset value range, the liquid injection port docking device 30 is controlled to stop working.

[0057] For the above-mentioned deformation amount detection device 10 of the battery housing, the detection mechanism 200 detects the deformation amount of the side surface 500 of the battery 20 through the detection area 101. When the detection mechanism 200 detects that the deformation amount of the side surface 500 reaches the preset value, the liquid injection port docking device 30 is controlled to stop working to prevent the side surface 500 of the battery housing from deforming further. Since the deformation amount of the side surface 500 of the battery 20 is small at this time, the film wrapping roller can be compatible with the deformed part of the side surface of the battery housing, enabling the packaging film to be completely attached to the side surface 500, improving the yield rate of film wrapping; due to the high yield rate of film wrapping, the frequency of manual film tearing, glue cleaning treatment, and re-film wrapping is reduced, that is, the frequency of rework is reduced, thereby improving the production capacity of the film wrapping equipment and further improving the manufacturing efficiency of the battery 20.

[0058] In some preferred embodiments, a positioning cavity 102 is formed inside the positioning mechanism 100. The detection area 101 is located on the side of the positioning cavity 102. The positioning cavity 102 is used to fix the battery 20, so that the side surface 500 of the housing of the battery 20 is correspondingly arranged with the detection area 101. Specifically, there is a positioning opening 1021 above the positioning cavity 102. The battery 20 enters the positioning cavity 102 through the positioning opening 1021 and is accommodated in the positioning cavity 102. The inner wall of the positioning cavity 102 abuts against the battery 20, so that the inner wall of the positioning cavity 102 restricts the position of the battery 20, and further enables the positioning mechanism 100 to fix the battery 20, so as to facilitate the detection mechanism 200 to detect the deformation amount of the side surface 500 of the housing of the battery 20. In this embodiment, the battery 20 is placed in the positioning cavity 102 through the positioning opening 1021, and the positioning of the battery 20 can be realized, improving the positioning convenience of the battery 20. Moreover, there is no need for a power element to fix the battery 20, simplifying the positioning mechanism 100 and thus simplifying the battery housing deformation amount detection device 10.

[0059] Of course, in some other embodiments, the positioning mechanism 100 may be a clamping mechanism that clamps the battery 20, and a detection area 101 is formed inside the clamping mechanism. It can be understood that the clamping mechanism is a conventional technology and will not be elaborated in the present invention.

[0060] In some preferred embodiments, the battery housing deformation amount detection device 10 further includes a carrier 400. The positioning mechanism 100 is installed on the carrier 400, and the detection mechanism 200 is installed on the carrier 400 to improve the convenience and efficiency of handling the battery housing deformation amount detection device 10. Of course, in some other embodiments, the carrier 400 of the battery housing deformation amount detection device 10 can be omitted, and the positioning mechanism 100 and the detection mechanism 200 are both placed on the ground or the workbench of an adjacent device.

[0061] Embodiment 2:

[0062] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the battery housing deformation amount detection device 10 of the present invention. Please refer to Figures 2 to 5 .

[0063] The number of the detection areas 101 is multiple, and the multiple detection areas 101 are used to be arranged in one-to-one correspondence with multiple housing sides 500 of the battery 20. The detection mechanism 200 includes multiple detection components 210, and the multiple detection components 210 are arranged in one-to-one correspondence with the multiple detection areas 101. Each detection component 210 is used to detect the deformation amount of the corresponding housing side 500. In this embodiment, the battery 20 fixed by the positioning mechanism 100 has multiple housing sides 500. By using the multiple detection components 210 to detect the multiple housing sides 500 respectively, the switching of the detection component 210 between the multiple housing sides 500 is avoided, thereby reducing the detection delay time, improving the timeliness of detection, suppressing the problem of excessive deformation of the battery 20, and further improving the film coating yield.

[0064] In some preferred embodiments, the detection component 210 includes a mounting member 211 and a detection member 212, and the detection member 212 is connected to the mounting member 211. The detection member 212 of each detection component 210 is used to be arranged corresponding to the corresponding detection area 101, and the detection member 212 of each detection component 210 is used to detect the deformation amount of the corresponding housing side 500. In this embodiment, the detection member 212 is connected to the mounting member 211. The detection member 212 is mounted at a predetermined height through the mounting member 211 and arranged corresponding to the corresponding housing side 500 to ensure that the detection member 212 can detect the deformation amount of the corresponding housing side 500.

[0065] In some preferred embodiments, the detection component 210 includes multiple detection members 212, and the multiple detection members 212 are connected to the mounting member 211 at intervals. The multiple detection members 212 of each detection component 210 are all used to detect the corresponding housing side 500, that is, each housing side 500 is detected by multiple detection members 212, so that each housing side 500 has multiple detection points, improving the detection accuracy, suppressing the problem of excessive deformation of the housing side 500, and further improving the film coating yield.

[0066] In some more preferred embodiments, the multiple detection members 212 are arranged at intervals along the length direction of the battery 20. Of course, in some other embodiments, the multiple detection members 212 can also be arranged at intervals along the width direction, height direction or irregular direction of the battery 20.

[0067] In some preferred embodiments, each detection component 210 includes three detection members 212. Of course, the number of the detection members 212 of each detection component 210 can be set according to the area of the housing side of the battery. For example, in some other embodiments, the number of the detection members 212 of each detection component 210 can be one, two, four or other numbers.

[0068] In some preferred embodiments, the detection member 212 is a 3D profiler. Of course, the detection member 212 is not limited to a 3D profiler. For example, in some other embodiments, the detection member 212 is a distance measuring sensor, a laser rangefinder, an ultrasonic rangefinder, an infrared rangefinder, a total station, or other existing components capable of measuring distance.

[0069] In some of these embodiments, the positioning mechanism 100 is used to fix the square battery 20. The square battery 20 has a plurality of housing sides 500, and the plurality of housing sides 500 are respectively two relatively arranged large surfaces 510 and two relatively arranged small surfaces 520. The plurality of detection areas 101 are respectively two relatively arranged first detection areas 1011 and two relatively arranged second detection areas 1012. The two first detection areas 1011 are respectively arranged corresponding to the two large surfaces 510 of the square battery 20, and the two second detection areas 1012 are respectively arranged corresponding to the two small surfaces 520 of the square battery 20. The plurality of detection components 210 are respectively two first detection components 210a and two second detection components 210b. The two first detection components 210a are arranged in one-to-one correspondence with the two first detection areas 1011, so that the two first detection components 210a respectively detect the deformation amounts of the two large surfaces 510 of the square battery 20. The two second detection components 210b are arranged in one-to-one correspondence with the two second detection areas 1012, so that the two second detection components 210b respectively detect the deformation amounts of the two small surfaces 520 of the square battery 20. In some other embodiments, the two first detection areas 1011 are respectively arranged corresponding to the two small surfaces 520 of the square battery 20, and the two second detection areas 1012 are respectively arranged corresponding to the two large surfaces 510 of the square battery 20; the two first detection components 210a are arranged in one-to-one correspondence with the two first detection areas 1011, so that the two first detection components 210a respectively detect the deformation amounts of the two small surfaces 520 of the square battery 20, and the two second detection components 210b are arranged in one-to-one correspondence with the two second detection areas 1012, so that the two second detection components 210b respectively detect the deformation amounts of the two large surfaces 510 of the square battery 20. The areas of the large surface 510 and the small surface 520 of the square battery 20 are different. By using different detection components 210 to detect the large surface 510 and the small surface 520 respectively, it is beneficial to improve the accuracy of detection.

[0070] In some of these embodiments, the positioning cavity 102 is adapted to the square battery 20, the number of detection areas 101 is four, the four detection areas 101 are arranged along the circumferential direction of the positioning cavity 102, and the detection areas 101 communicate with the positioning cavity 102. In some preferred embodiments, the four detection areas 101 are arranged at intervals, and a positioning portion 110 is formed between two adjacent detection areas 101, so that the positioning mechanism 100 is formed with four positioning portions 110, and the four positioning portions 110 jointly enclose the inner wall of the positioning cavity 102. The battery 20 is limited by the four positioning portions 110, which improves the position stability of the battery 20, thereby improving the detection accuracy of the detection mechanism 200 and further reducing the defective film wrapping rate.

[0071] In some preferred embodiments, the detection mechanism 200 further includes two driving components 220, and two first detection components 210a are respectively connected to the power output ends of the two driving components 220. The driving component 220 is used to drive the first detection component 210a to move along a first direction, and the first direction is the length direction of the square battery. That is to say, each driving component 220 is used to drive the corresponding first detection component 210a to move along the length direction of the square battery 20, so that each first detection component 210a detects multiple points on the corresponding large surface 510, that is, multiple detection points are provided on each large surface 510 of the square battery 20, improving the detection accuracy and further reducing the defective film wrapping rate. In this embodiment, the driving component 220 drives the first detection component 210a to reciprocate along the length direction of the square battery 20, so that the first detection component 210a repeatedly detects multiple points on the large surface 510. It can be understood that when the driving component 220 drives the first detection component 210a to move along the length direction of the square battery 20, the first detection component 210a can perform continuous detection or intermittent detection on the large surface 510.

[0072] In some other embodiments, the first direction may also be the width direction of the square battery 20. That is to say, each driving component 220 is used to drive the corresponding first detection component 210a to move along the width direction of the square battery 20, so that each first detection component 210a detects multiple points on the corresponding small surface 520, that is, multiple detection points are provided on each small surface 520 of the square battery 20, improving the detection accuracy and further reducing the defective film wrapping rate.

[0073] In some other preferred embodiments, the battery housing deformation detection device 10 further includes a bearing platform 400. The bearing platform 400 is provided with a guiding groove 401 along a first direction. The first detection assembly 210a is provided with a guiding member 213. The guiding member 213 is adapted to the guiding groove 401. The guiding member 213 is slidably connected to the guiding groove 401, that is, the guiding member 213 is located in the guiding groove 401 and is slidably connected to the bearing platform 400. The inner wall of the guiding groove 401 guides the guiding member 213, improving the movement stability of the guiding member 213, and further improving the movement stability of the first detection assembly 210a, so as to improve the detection accuracy of the first detection assembly 210a and further reduce the defective film wrapping rate. Of course, it can be understood that in some other embodiments, the guiding groove 401 and the guiding member 213 of the battery housing deformation detection device 10 can be omitted.

[0074] In some preferred embodiments, the first detection assembly 210a is formed with a connection hole 2101. The driving assembly 220 includes a driving motor 221 and a lead screw 222. The lead screw 222 is connected to the output shaft of the driving motor 221. The lead screw 222 passes through the connection hole 2101 along the first direction and is threadedly connected to the first detection assembly 210a. The extending direction of the lead screw 222 is parallel to the first direction. The output shaft of the driving motor 221 drives the lead screw 222 to rotate, so that the lead screw 222 drives the first detection assembly 210a to move along the lead screw 222 and makes the first detection assembly 210a move along the first direction. In this embodiment, since the lead screw 222 has a high transmission accuracy and high transmission stability, the movement accuracy and stability of the first detection assembly 210a are improved, thereby improving the detection accuracy and reducing the defective film wrapping rate. Further, the connection hole 2101 is formed in the guiding member 213.

[0075] It can be understood that the driving assembly 220 can also be a cylinder, a hydraulic cylinder, an electric cylinder or other existing linear driving members.

[0076] In some preferred embodiments, the first detection assembly 210a includes a plurality of detection members 212. The plurality of detection members 212 are connected to the mounting member 211 at intervals in the vertical direction. The plurality of detection members 212 of the first detection assembly 210a are all used to detect the deformation amount of the corresponding housing side 500 of the square battery 20, and the plurality of detection members 212 are arranged at intervals in the vertical direction, that is, the plurality of detection members 212 are arranged at intervals in the height direction of the square battery 20. Coupled with the driving assembly 220 driving the first detection assembly 210a to move along the first direction, more detection points are provided on the corresponding housing side 500 of the square battery 20, improving the detection accuracy, suppressing the problem of excessive deformation of the housing side 500, and further improving the good film wrapping rate.

[0077] In some preferred embodiments, the second detection component 210b includes a plurality of detection elements 212, and the plurality of detection elements 212 are connected to the mounting member 211 at intervals in the vertical direction. The plurality of detection elements 212 of the second detection component 210b are all used to detect the deformation amount of the corresponding housing side surface 500 of the square battery 20, and the plurality of detection elements 212 are arranged at intervals in the vertical direction, that is, the plurality of detection elements 212 are arranged at intervals in the height direction of the square battery 20, so that the corresponding housing side surface 500 of the square battery 20 has a plurality of detection points, improving the detection accuracy, suppressing the problem of excessive deformation of the housing side surface 500, and further improving the encapsulation yield.

[0078] In some preferred embodiments, the battery housing deformation amount detection device 10 further includes a battery standard part, and the battery standard part is used to be fixed in the positioning mechanism 100, and the side surface of the battery standard part is arranged corresponding to the detection area 101.

[0079] In this embodiment, before detection, the battery standard part is placed in the positioning mechanism 100 so that the side surface of the battery standard part is arranged corresponding to the detection area 101 of the positioning mechanism 100, and the battery standard part is measured by the detection mechanism 200 to obtain a measured reference value; then the battery standard part is taken out from the positioning mechanism 100, the battery 20 is placed in the positioning mechanism 100 so that the housing side surface 500 of the battery 20 is arranged corresponding to the detection area 101, and then the liquid injection port docking device 30 acts on the liquid injection port of the battery 20. During the operation of the liquid injection port docking device 30, the gas or liquid inside the battery 20 will gradually decrease or increase, so that the housing side surface 500 of the battery 20 will gradually sink or expand. At this time, the detection mechanism 200 detects the deformation amount of the housing side surface 500 through the detection area 101, that is, the difference between the measured value and the reference value. In this way, the reference value for detection is determined by the battery standard part, improving the detection accuracy.

[0080] Embodiment 3:

[0081] On the basis of the above embodiments, this embodiment provides a battery housing deformation amount control device, please refer to Figures 1 to 2 .

[0082] A battery housing deformation amount control device includes a liquid injection port docking device 30 and the battery housing deformation amount detection device 10 described in any of the above embodiments. The liquid injection port docking device 30 is arranged adjacent to the positioning mechanism 100. The liquid injection port docking device 30 is a device for filling gas or liquid into the battery 20, or a device for evacuating gas or liquid from the battery 20. The liquid injection port docking device 30 can be a helium filling device used in the first helium leak detection process, a liquid injection device used in the liquid injection process, a vacuum pumping device used in the negative pressure forming process, or a helium filling device used in the helium filling process, etc.

[0083] In this embodiment, during the operation of the liquid injection port docking device 30, the gas or liquid inside the battery 20 gradually decreases or increases, causing the side surface 500 of the battery 20 housing to gradually dent or expand. At this time, the detection mechanism 200 detects the deformation amount of the side surface 500 of the housing through the detection area 101. When the detection mechanism 200 detects that the deformation amount of the side surface 500 of the housing reaches the preset value, the liquid injection port docking device 30 is controlled to stop working to avoid further deformation of the battery 20, that is, to avoid further denting or expansion of the battery 20. At this time, the deformation amount of the side surface 500 of the battery 20 housing is small, so the film wrapping roller can be compatible with the deformed part of the side surface of the battery housing, enabling the packaging film to be completely attached to the side surface 500.

[0084] For the battery housing deformation amount control device of the present utility model, the detection mechanism 200 detects the deformation amount of the side surface 500 of the battery 20 through the detection area 101. When the detection mechanism 200 detects that the deformation amount of the side surface 500 of the housing reaches the preset value, the liquid injection port docking device 30 is controlled to stop working to avoid further deformation of the side surface 500 of the battery 20 housing. Since the deformation amount of the side surface 500 of the battery 20 is small at this time, the film wrapping roller can be compatible with the deformed part of the side surface of the battery housing, enabling the packaging film to be completely attached to the side surface 500, improving the yield of film wrapping; due to the high yield of film wrapping, the frequency of manual film tearing, glue cleaning, and re-film wrapping is reduced, that is, the frequency of rework is reduced, thereby improving the production capacity of the film wrapping device and further improving the manufacturing efficiency of the battery 20.

[0085] In some preferred embodiments, the liquid injection port docking device 30 includes a gas storage cylinder 600, a delivery pipeline 700, a switching valve 800, and a docking member 900. Among them, the gas storage cylinder 600 stores positive pressure gas. One end of the delivery pipeline 700 is connected to the gas storage cylinder 600, the input end of the switching valve 800 is connected to the other end of the delivery pipeline 700, the switching valve 800 is used to control the on / off of the delivery pipeline 700, the input end of the docking member 900 is connected to the output end of the switching valve 800, and the output end of the docking member 900 is used to dock with the liquid injection port of the battery 20 to connect the output end of the docking member 900 to the liquid injection port of the battery 20. In this embodiment, when inflating the battery 20, the switching valve 800 is opened, so that the gas in the gas storage cylinder 600 sequentially passes through the delivery pipeline 700, the switching valve 800, and the docking member 900 and enters the battery 20 to fill the battery 20 with gas. By controlling the switching valve 800 to control gas delivery, the convenience of controlling the liquid injection port docking device 30 is improved. Preferably, the above gas can be helium.

[0086] Furthermore, the docking member 900 is an elastic structure, and the docking member 900 elastically abuts against the top cover of the battery 20, so that the sealing performance between the docking member 900 and the battery 20 is relatively high, improving the inflation efficiency. At the same time, the problem that the docking member 900 scratches the battery 20 is avoided, and the surface quality of the battery 20 is improved.

[0087] In some preferred embodiments, the battery housing deformation control device further includes a control module 300, and the control module 300 is installed on the carrier 400. The control module 300 is communicatively connected to the detection mechanism 200, and the control module 300 is also communicatively connected to the control end of the liquid injection port docking device 30, so that the control module 300 is used to control the liquid injection port docking device 30 to stop working. In this embodiment, when the detection mechanism 200 detects that the deformation amount of the side surface 500 of the housing reaches a preset value, the detection mechanism 200 transmits a deformation signal to the control module 300. The control module 300 receives the deformation signal of the detection mechanism 200 and controls the liquid injection port docking device 30 to stop working to avoid further deformation of the battery 20. By controlling the control module 300 to control the liquid injection port docking device 30 to stop working, the control efficiency is improved.

[0088] In some preferred embodiments, the control end of the liquid injection port docking device 30 is a switching valve 800, and the control module 300 is used to control the switching valve 800 to close, so that the liquid injection port docking device 30 stops working.

[0089] In some embodiments, the control module 300 may be a PLC controller. Of course, the control module 300 may also be a DSC controller, a PID controller or other existing controllers.

[0090] It should be noted that the method for the control module 300 to control the liquid injection port docking device 30 belongs to conventional technology and is not within the protection scope of the present utility model.

[0091] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0092] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0093] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the component is required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0094] In the present utility model, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, over and on the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being below, under and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0095] Although the description of the present utility model is made in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included within the spirit and scope of the appended claims.

Claims

1. A battery housing deformation amount detection device, characterized in that, Comprising: A positioning mechanism (100) for fixing the battery (20), the positioning mechanism (100) being formed with a detection area (101), the detection area (101) being configured to be correspondingly arranged with the side surface (500) of the housing of the battery (20); and A detection mechanism (200), arranged adjacent to the positioning mechanism (100), the detection mechanism (200) being correspondingly arranged with the detection area (101), such that the detection mechanism (200) is configured to detect the deformation amount of the side surface (500) of the housing.

2. The battery case deformation amount detection device according to claim 1, wherein The number of the detection areas (101) is multiple, and the multiple detection areas (101) are configured to be correspondingly arranged with the multiple side surfaces (500) of the battery (20) one by one; the detection mechanism (200) includes multiple detection components (210), the multiple detection components (210) being correspondingly arranged with the multiple detection areas (101) one by one, and each detection component (210) is configured to detect the deformation amount of the corresponding side surface (500) of the housing.

3. The battery housing deformation amount detection device according to claim 2, characterized in that The detection component (210) includes a mounting member (211) and a detection member (212), the detection member (212) being connected to the mounting member (211); the detection members (212) of each detection component (210) are configured to be correspondingly arranged with the corresponding detection area (101), and the detection members (212) of each detection component (210) are configured to detect the deformation amount of the corresponding side surface (500) of the housing.

4. The battery case deformation amount detection device according to claim 3, characterized in that The detection component (210) includes multiple detection members (212), the multiple detection members (212) being spaced apart and connected to the mounting member (211).

5. The battery housing deformation amount detection device according to claim 2, characterized in that, The positioning mechanism (100) is configured to fix a square battery (20), the multiple detection areas (101) are respectively two oppositely arranged first detection areas (1011) and two oppositely arranged second detection areas (1012), the multiple detection components (210) are respectively two first detection components (210a) and two second detection components (210b), the two first detection components (210a) are correspondingly arranged with the two first detection areas (1011) one by one, and the two second detection components (210b) are correspondingly arranged with the two second detection areas (1012) one by one.

6. The battery case deformation amount detection device according to claim 5, wherein, The detection mechanism (200) further includes two driving components (220), the two first detection components (210a) are correspondingly connected to the power output ends of the two driving components (220), and the driving components (220) are configured to drive the first detection components (210a) to move in a first direction.

7. The battery housing deformation amount detection device according to claim 6, characterized in that, The battery housing deformation amount detection device further includes a carrier (400), the carrier (400) is provided with a guiding groove (401) along the first direction, the first detection component (210a) is provided with a guiding member (213), and the guiding member (213) is slidably connected in the guiding groove (401).

8. The battery housing deformation amount detection device according to claim 6, wherein The first detection component (210a) is formed with a connection hole (2101); the driving component (220) includes a driving motor (221) and a lead screw (222), the lead screw (222) is connected to the output shaft of the driving motor (221), and the lead screw (222) penetrates through the connection hole (2101) along the first direction and is threadedly connected to the first detection component (210a).

9. The battery housing deformation amount detection device according to claim 6, wherein The first detection component (210a) includes a plurality of detection elements (212), and the plurality of detection elements (212) are connected to the mounting member (211) at intervals in the vertical direction.

10. The battery housing deformation amount detection device according to any one of claims 1 to 9, characterized in that, A positioning cavity (102) is formed inside the positioning mechanism (100), the detection area (101) is located on the side of the positioning cavity (102), and the positioning cavity (102) is used to fix the battery (20).

11. The battery housing deformation amount detection device according to any one of claims 1 to 9, characterized in that, The battery housing deformation detection device further includes a battery standard part, which is used to be fixed inside the positioning mechanism (100), and the side surface of the battery standard part is arranged corresponding to the detection area (101).

12. A device for controlling the deformation amount of a battery case, characterized in that, It includes a liquid injection port docking device (30) and the battery housing deformation detection device (10) according to any one of claims 1 to 11, and the liquid injection port docking device (30) is arranged adjacent to the positioning mechanism (100).

13. The battery case deformation amount control device according to claim 12, wherein The liquid injection port docking device (30) includes: An air storage cylinder (600); A delivery pipeline (700), one end of the delivery pipeline (700) is communicated with the air storage cylinder (600); A switching valve (800), the input end of the switching valve (800) is communicated with the other end of the delivery pipeline (700); and A docking member (900), the input end of the docking member (900) is communicated with the output end of the switching valve (800), and the output end of the docking member (900) is used to dock with the liquid injection port of the battery (20).

14. The battery housing deformation amount control device according to any one of claims 12 to 13, characterized in that The battery housing deformation control device further includes a control module (300), the control module (300) is communicatively connected to the detection mechanism (200), and the control module (300) is also communicatively connected to the control end of the liquid injection port docking device (30), so that the control module (300) is used to control the liquid injection port docking device (30) to stop working.

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