A soft-pack lithium battery pack structure with high adaptability and an adaptation method

Abstract

The present invention discloses a soft-pack lithium battery pack structure with high adaptability and an adaptation method, which includes a top cover, a bottom cover, a cross wrapping strip, a side waist limiting strip and an end cover connecting ring. The two cross wrapping strips are respectively heat-melted and connected to the bottom of the top cover and the top of the bottom cover. By setting a horizontal adaptation and shaping mechanism to cooperate with the insertion frame, the horizontal error and specifications of the lithium battery can be adapted. At the same time, the front and rear insertion frames can be stably pressed against the front and rear sides of the lithium battery through the insertion and installation mechanism, and the meshing component can combine and install the top cover and the bottom cover with the cross wrapping strip to ensure the stability of the longitudinal installation, which is convenient for adapting to various specifications. It solves the problems of low installation adaptation rate in the pack production line, resulting in difficult combination due to the influence of the error of the battery aluminum shell on the assembly environment, imprecise wrapping, and the need for a long time and a large amount of money investment for the re-customized pack production line when changing specifications, and complex debugging.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packaging, and specifically relates to a flexible lithium battery pack structure with high adaptability and an adaptation method thereof. Background Art

[0002] At present, for the continuous increase in the discharge rate of flexible lithium batteries, due to their high rate, large instantaneous discharge current, high volume specific energy, high weight specific energy, wide operating temperature range, low self-power consumption, and good cycle performance, their application fields are extensive, such as for model airplanes, drones, model racing cars, etc. In the industry, the shape of the battery pack is fixed by heat-shrinking PVC sleeves, and the installation adaptation rate in the pack production line is low, resulting in the assembly environment being often affected by the error of the battery aluminum shell and difficult to combine, and the wrapping is not precise. At the same time, when changing the specifications, re-customizing the pack production line requires a long time and a large amount of money, and the debugging is complex. Summary of the Invention

[0003] To solve the problems raised in the above background art, the purpose of the present invention is to provide a flexible lithium battery pack structure with high adaptability and an adaptation method thereof, which has the advantage of high adaptability, and solves the problems that the installation adaptation rate in the pack production line is low, resulting in the assembly environment being often affected by the error of the battery aluminum shell and difficult to combine, and the wrapping is not precise. At the same time, when changing the specifications, re-customizing the pack production line requires a long time and a large amount of money, and the debugging is complex.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A flexible lithium battery pack structure with high adaptability and an adaptation method thereof, including a top cover, a bottom cover, a cross wrapping strip, a side waist limiting strip, and an end cover connecting ring. The two cross wrapping strips are respectively heat-melted and connected to the bottom of the top cover and the top of the bottom cover. The bottom of the side waist limiting strip is heat-melted and connected with a plug-in frame. The two end cover connecting rings are respectively located at the bottom of the top cover and the top of the bottom cover. Transverse adaptation and shaping mechanisms are welded on both sides of the end cover connecting ring. Plug-in frames are arranged on the front and back of the side waist limiting strip. Plug-in installation mechanisms are fixedly connected to both sides of the plug-in frame close to the side waist limiting strip. A meshing component is fixedly installed on the side of the end cover connecting ring away from the side waist limiting strip.

[0005] Preferably, the transverse adaptation and shaping mechanism includes a cross bar, a positioning hole, a positioning convex block, and a spring piece. The two cross bars are welded on both sides of the end cover connecting ring. The positioning hole is opened on the surface of the cross bar. A plurality of positioning holes are opened, and the plurality of positioning holes are equidistantly distributed. The positioning convex block is slidably installed inside the plug-in frame. One end of the spring piece is fixed to the positioning convex block, and the other end of the spring piece is fixed to the inside of the plug-in frame.

[0006] Preferably, in the present invention, the plug-in installation mechanism includes a plug-in strip, and positioning teeth are integrally cast inside the plug-in strip. There are several positioning teeth, and the several positioning teeth are evenly distributed. A plug-in slot for plugging and matching with the plug-in strip is opened inside the side waist limiting strip, and a meshing slot for meshing with the positioning teeth is opened on the inner wall of the plug-in slot.

[0007] Preferably, in the present invention, the meshing component includes a biting piece. There are four biting pieces, and the four biting pieces are annularly distributed. A jack for cooperating with the biting piece is opened at the center inside the cross-shaped wrapping strip.

[0008] Preferably, in the present invention, wrapping adaptation pieces are welded to the four corners of the cross-shaped wrapping strip far from the jack, and the outer diameter of the wrapping adaptation piece is twice the width of the cross-shaped wrapping strip.

[0009] Preferably, in the present invention, an elastic adaptation pad is adhered to one side of the plug-in frame close to the side waist limiting strip, and a deformation slot is opened inside the elastic adaptation pad.

[0010] Preferably, in the present invention, plastic shaping ribs are welded to one side of the cross-shaped wrapping strip far from the top cover and the bottom. Rubber blocks are fixedly connected to the bottom of the top cover and the top of the bottom cover.

[0011] Preferably, the method of the present invention is as follows:

[0012] S1. The meshing component combines the end cover connecting ring and the lower cross-shaped wrapping strip, then inserts and connects the lower horizontal strip with the plug-in frame, and then places the lithium battery on the top of the cross-shaped wrapping strip. The cross-shaped wrapping strip is pressed and fitted to the bottom of the lithium battery through a stamping device; at the same time, the horizontal strip forms a semi-wrapped lithium battery by fitting and wrapping the lithium battery through the plastic shaping rib during the stamping process;

[0013] S2. The conveying device conveys the upper cross-shaped wrapping strip and the upper horizontal strip after meshing to the top of the semi-wrapped lithium battery completed by stamping. The upper cross-shaped wrapping strip and the upper horizontal strip are pressed and fitted to the surface of the lithium battery through a stamping device, and the upper and lower packages of the lithium battery are limited to form a height-limited wrapped lithium battery;

[0014] S3. After the height-limited wrapped lithium battery is conveyed to the fastening position, the plug-in frames are inserted front and back. The output end of the plugging and tightening device sets the value of the tightening pressure sensor. The plug-in frames complete the annular wrapping through the plug-in strips, cooperate with the pressure data to complete the efficient combination, and cooperate with the elastic adaptation pads to tightly press a plurality of lithium batteries to complete the packaging.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention enables the lateral error and specifications of lithium batteries to be adapted by setting a lateral adaptation and shaping mechanism in cooperation with a plug-in frame. At the same time, the plug-in installation mechanism can stably press the front and rear plug-in frames against the front and rear sides of the lithium battery, and the meshing component can combine and install the top cover and the bottom cover with the cross wrapping strip to ensure the stability of longitudinal installation, facilitating the adaptation of various specifications. It solves the problems that in the pack production line, the installation adaptation rate is low, resulting in the assembly environment being often affected by the error of the battery aluminum shell and being difficult to combine, and the wrapping is not precise. At the same time, when changing the specifications, re-customizing the pack production line requires a long time and a large amount of money investment, and the debugging is complex, and has the advantage of high adaptability.

[0017] 2. The present invention adapts to the height error and lateral error through the length of the horizontal strip 71 to ensure comprehensiveness during wrapping. The opened positioning holes 72 can achieve the specification adaptation of multiple nodes. Without changing the wrapping material, simply replacing the mold can quickly complete the production of battery specification replacement. At the same time, the positioning convex blocks 73 in the plug-in frame 6 can maintain elasticity through the elastic pieces 74 and cooperate with the positioning holes 72 for positioning to prevent loosening of the combined size.

[0018] 3. The present invention enables the plug-in strip 91 to be inserted and combined with the side waist limiting strip 4 to horizontally press the lithium battery tightly. Through the meshing of multiple positioning teeth 92 and the meshing groove 94, the adaptation of the horizontal specifications is completed. The integrally formed positioning teeth 92 can prevent detachment and falling, and have higher connection strength to ensure the stability of the adjusted position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional combined structural schematic diagram of the present invention;

[0020] Figure 2 is a three-dimensional semi-sectional structural schematic diagram of the plug-in frame of the present invention;

[0021] Figure 3 is a three-dimensional structural schematic diagram of the plug-in frame and the side waist of the present invention;

[0022] Figure 4 is a three-dimensional structural schematic diagram of the meshing component of the present invention;

[0023] Figure 5 is an exploded three-dimensional structural schematic diagram of the present invention;

[0024] Figure 6 is of the present invention Figure 3 The enlarged view at A in;

[0025] Figure 7 is the method flow chart of the present invention.

[0026] In the figure: 1. Top cover; 2. Bottom cover; 3. Cross wrapping strip; 4. Side waist limiting strip; 5. End cover connecting ring; 6. Insertion frame; 7. Transverse adaptation and shaping mechanism; 71. Cross bar; 72. Positioning hole; 73. Positioning convex block; 74. Elastic sheet; 8. Insertion rack; 9. Insertion installation mechanism; 91. Insertion strip; 92. Positioning tooth; 93. Insertion groove; 94. Engagement groove; 10. Engagement component; 101. Biting piece; 102. Insertion hole; 11. Wrapping adaptation piece; 12. Elastic adaptation pad; 13. Deformation groove; 14. Shaping rib; 15. Rubber block. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] As Figures 1 to 7 shown, a soft-pack lithium battery pack structure and adaptation method with high adaptability provided by the present invention include a top cover 1, a bottom cover 2, a cross wrapping strip 3, a side waist limiting strip 4 and an end cover connecting ring 5. Two cross wrapping strips 3 are respectively heat-sealed and connected to the bottom of the top cover 1 and the top of the bottom cover 2. The bottom of the side waist limiting strip 4 is heat-sealed and connected with an insertion frame 6. Two end cover connecting rings 5 are respectively located at the bottom of the top cover 1 and the top of the bottom cover 2. Transverse adaptation and shaping mechanisms 7 are welded on both sides of the end cover connecting ring 5. Insertion racks 8 are arranged on the front and back of the side waist limiting strip 4. Insertion installation mechanisms 9 are fixedly connected to both sides of the insertion rack 8 close to the side waist limiting strip 4. An engagement component 10 is fixedly installed on the side of the end cover connecting ring 5 away from the side waist limiting strip 4.

[0029] Referring to Figure 2 , the transverse adaptation and shaping mechanism 7 includes a cross bar 71, a positioning hole 72, a positioning convex block 73 and an elastic sheet 74. Two cross bars 71 are welded on both sides of the end cover connecting ring 5. The positioning hole 72 is opened on the surface of the cross bar 71. A plurality of positioning holes 72 are opened, and the plurality of positioning holes 72 are equidistantly distributed. The positioning convex block 73 is slidably installed inside the insertion frame 6. One end of the elastic sheet 74 is fixed to the positioning convex block 73, and the other end of the elastic sheet 74 is fixed to the inside of the insertion frame 6.

[0030] As a technical optimization solution of the present invention, the length of the horizontal bar 71 is used to adapt to the height error and the horizontal error to ensure comprehensiveness during wrapping. The opened positioning holes 72 can achieve specification adaptation of multiple nodes. Without replacing the wrapping material, simply replacing the mold can quickly complete the replacement production of battery specifications. At the same time, the positioning protrusions 73 in the insertion frame 6 can maintain elasticity through the elastic pieces 74 and cooperate with the positioning holes 72 for positioning, and the dimensions after cooperation are treated to prevent loosening.

[0031] Reference Figure 6 , the insertion and installation mechanism 9 includes an insertion bar 91. The inner side of the insertion bar 91 is integrally cast with positioning teeth 92. There are several positioning teeth 92, and several positioning teeth 92 are equidistantly distributed. The inner side waist limit bar 4 is provided with an insertion slot 93 that is inserted and matched with the insertion bar 91, and the inner wall of the insertion slot 93 is provided with an engagement slot 94 that meshes with the positioning teeth 92.

[0032] As a technical optimization solution of the present invention, the insertion bar 91 can be inserted and combined with the side waist limit bar 4 to horizontally press the lithium battery tightly. Through the engagement of multiple positioning teeth 92 and the engagement slot 94, the horizontal specification is adjusted and adapted. The integrally formed positioning teeth 92 can prevent detachment and falling, and have greater connection strength to ensure the stability of the adjusted position.

[0033] Reference Figure 1 , the engagement component 10 includes four engaging pieces 101. The four engaging pieces 101 are annularly distributed, and a jack 102 for the engaging pieces 101 to cooperate with is opened at the center of the cross wrapping strip 3.

[0034] As a technical optimization solution of the present invention, the four engaging pieces 101 can be inserted and combined through the jack 102 of the cross wrapping strip 3, then stamped into an inclined angle through a conical mold, and then the four engaging pieces 101 are pressed into a horizontal shape by a stamping machine to ensure that the cross wrapping strip 3 and the horizontal bar 71 will not detach and fall after combination.

[0035] Reference Figure 1 , the four corners of the cross wrapping strip 3 far from the jack 102 are all welded with wrapping adaptation pieces 11, and the outer diameter of the wrapping adaptation pieces 11 is twice the width of the cross wrapping strip 3.

[0036] As a technical optimization solution of the present invention, the wrapping adaptation pieces 11 can better wrap the arc surface of the circular lithium battery, prevent the cross wrapping strip 3 from loosening horizontally after wrapping the lithium battery, and the doubled strip width increases the wrapping area, which can effectively ensure the stability of the contact surface.

[0037] Reference Figure 1 , an elastic adaptation pad 12 is adhered to one side of the insertion frame 8 close to the side waist limit bar 4, and a deformation groove 13 is opened inside the elastic adaptation pad 12.

[0038] As a technical optimization solution of the present invention, the elasticity and deformation groove 13 of the elastic adaptor pad 12 are used to fit with the lithium battery, preventing installation gaps from occurring after the lithium battery is installed, improving the installation effect, ensuring the installation stability of the lithium battery, preventing the lithium battery from being squeezed and deformed by the plug-in rack 8, and the deformation groove 13 enables the elastic adaptor pad 12 to have a deformation space.

[0039] Reference Figure 1 , a plastic shaping rib 14 is welded to one side of the cross wrapping strip 3 away from the top cover 1 and the bottom, and rubber blocks 15 are fixedly connected to the bottom of the top cover 1 and the top of the bottom cover 2.

[0040] As a technical optimization solution of the present invention, the plastic shaping rib 14 can ensure that the cross wrapping strip 3 does not bend and loosen after wrapping the lithium battery, ensuring the shaping effect and the wrapping force after fitting. At the same time, the rubber block 15 can eliminate the longitudinal installation pressing gap, preventing the lithium battery from loosening and affecting the wrapping effect.

[0041] Reference Figure 7 , the method is as follows:

[0042] S1, the engaging component 10 combines the end cap connecting ring 5 with the lower cross wrapping strip 3, then inserts the lower horizontal strip 71 into the plug-in frame 6, and then places the lithium battery on the top of the cross wrapping strip 3. The cross wrapping strip 3 is pressed and fitted to the bottom of the lithium battery by a stamping device; at the same time, the horizontal strip 71 forms a semi-wrap of the lithium battery by fitting and wrapping the lithium battery through the plastic shaping rib 14 during the stamping process;

[0043] S2, the conveying device conveys the engaged upper cross wrapping strip 3 and upper horizontal strip 71 to the top of the semi-wrapped lithium battery after stamping. The upper cross wrapping strip 3 and the upper horizontal strip 71 are pressed and fitted to the surface of the lithium battery by a stamping device, and the upper and lower packages of the lithium battery are limited to form a height-limited wrapped lithium battery;

[0044] S3, after the height-limited wrapped lithium battery is conveyed to the fastening position, the plug-in racks 8 are inserted front and back. The output end of the plugging and tightening device sets the value of the tightening pressure sensor. The plug-in racks 8 complete the annular wrapping through the plugging strips 91, cooperate with the pressure data to complete the high-efficiency combination, and cooperate with the elastic adaptor pads 12 to tighten multiple lithium batteries to complete the packaging.

[0045] Working principle and usage process of the present invention: During use, the bite piece 101 is inserted through the jack 102, then the cross wrapping strip 3 and the end cover connecting ring 5 are combined, and then pressed into an inclined angle through a conical mold. Then, the four bite pieces 101 are pressed into a horizontal shape through a stamping machine to ensure that the cross wrapping strip 3 and the horizontal strip 71 will not separate and fall off after combination. Subsequently, a lithium battery is placed on the top of the lower end cover connecting ring 5 after assembly through the conveying device in the assembly line. After the lithium battery is placed, the horizontal strip 71 passes through the insertion frame 6 and is inserted and positioned with the positioning hole 72 through the positioning convex block 73. Then, the four sides of the cross wrapping strip 3 are pressed and wrapped on the surface of the lithium battery through stamping equipment, and at the same time, the horizontal strip 71 is pressed to wrap the surface of the lithium battery. After that, the conveying device conveys the upper cross wrapping strip 3 and the horizontal strip 71 after meshing to the top of the semi-wrapped lithium battery after stamping, and then the upper cross wrapping strip 3 and the horizontal strip 71 are pressed and wrapped on the surface of the lithium battery through stamping equipment. Subsequently, the front and rear insertion frames 8 are squeezed and inserted towards the side waist limiting strip 4 through the horizontal pressing equipment, so that the insertion strip 91 can be inserted and combined with the side waist limiting strip 4 to tightly press the lithium battery horizontally. The adjustment and adaptation of the horizontal specification are completed through the meshing of multiple positioning teeth 92 and the meshing groove 94, and the overall packaging is completed. When changing the specification each time, this accessory can be continued to be used. By replacing the specification of the equipment mold in the assembly line, the production and manufacturing cost can be reduced, and the separate assembly of each component can facilitate the timely recycling and use of most of the components after damage, without the need for overall replacement.

[0046] In summary: For the soft-pack lithium battery pack structure with high adaptability and the adaptation method, by setting the horizontal adaptation and shaping mechanism to cooperate with the insertion frame, the horizontal error and specification of the lithium battery can be adapted. At the same time, the insertion and installation mechanism can stably press the front and rear insertion frames against the front and rear sides of the lithium battery, and the meshing component can combine and install the top cover and the bottom cover with the cross wrapping strip to ensure the stability of the longitudinal installation, which is convenient for adapting to multiple specifications. It solves the problems of low installation adaptation rate in the pack assembly line, resulting in the assembly environment being often affected by the error of the battery aluminum shell and being difficult to combine, and the wrapping is not precise. At the same time, when changing the specification, the newly customized pack assembly line requires a long time and a large amount of money investment, and the debugging is complex.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft-pack lithium battery pack structure with high adaptability, comprising a top cover (1), a bottom cover (2), a cross wrapping strip (3), a side waist limiting strip (4) and an end cover connecting ring (5). Characterized in that: The two cross wrapping strips (3) are respectively heat-melt connected to the bottom of the top cover (1) and the top of the bottom cover (2). The bottom of the side waist limiting strip (4) is heat-melt connected with a plug-in frame (6). The two end cover connecting rings (5) are respectively located at the bottom of the top cover (1) and the top of the bottom cover (2). On both sides of the end cover connecting ring (5), there are welded transverse adaptation and shaping mechanisms (7). The transverse adaptation and shaping mechanism (7) includes a cross bar (71), a positioning hole (72), a positioning convex block (73) and a spring piece (74). The two cross bars (71) are welded on both sides of the end cover connecting ring (5). The positioning hole (72) is opened on the surface of the cross bar (71). There are several positioning holes (72), and several positioning holes (72) are equidistantly distributed. The positioning convex block (73) is slidably installed inside the plug-in frame (6). One end of the spring piece (74) is fixed to the positioning convex block (73), and the other end of the spring piece (74) is fixed to the inside of the plug-in frame (6). On the front and back of the side waist limiting strip (4), there are plug-in frames (8). On both sides of the plug-in frame (8) close to the side waist limiting strip (4), there are fixedly connected plug-in installation mechanisms (9). On the side of the end cover connecting ring (5) away from the side waist limiting strip (4), there is fixedly installed an engaging component (10).

2. A soft-pack lithium battery pack structure with high adaptability according to claim 1, Characterized in that: The plug-in installation mechanism (9) includes a plug-in strip (91). Inside the plug-in strip (91), there is integrally cast positioning teeth (92). There are several positioning teeth (92), and several positioning teeth (92) are equidistantly distributed. Inside the side waist limiting strip (4), there is a plug-in slot (93) that is in plug-in fit with the plug-in strip (91). On the inner wall of the plug-in slot (93), there is an engaging slot (94) that meshes with the positioning teeth (92).

3. A soft-pack lithium battery pack structure with high adaptability according to claim 1, Characterized in that: The engaging component (10) includes a biting piece (101). There are four biting pieces (101), and the four biting pieces (101) are annularly distributed. Inside the center of the cross wrapping strip (3), there is a jack (102) that is used in cooperation with the biting piece (101).

4. A soft-pack lithium battery pack structure with high adaptability according to claim 3, Characterized in that: At the four corners of the cross wrapping strip (3) away from the jack (102), there are welded wrapping adaptation pieces (11). The outer diameter of the wrapping adaptation piece (11) is twice the width of the cross wrapping strip (3).

5. A soft-pack lithium battery pack structure with high adaptability according to claim 1, Characterized in that: One side of the plug-in frame (8) close to the side waist limit strip (4) is adhered with an elastic adaptor pad (12), and a deformation groove (13) is formed inside the elastic adaptor pad (12).

6. A soft-pack lithium battery battery pack structure with high adaptability according to claim 1, characterized in that: One side of the cross wrapping strip (3) away from the top cover (1) and the bottom is welded with a shaping rib (14), and rubber blocks (15) are fixedly connected to the bottom of the top cover (1) and the top of the bottom cover (2).

7. An adaptation method for a soft-pack lithium battery battery pack structure with high adaptability according to any one of claims 1-6, characterized in that: The method comprises the following steps: S1, the engaging component (10) combines the end cover connecting ring (5) with the lower cross wrapping strip (3), then inserts and connects the lower horizontal strip (71) with the plug-in frame (6), and then places the lithium battery on the top of the cross wrapping strip (3), and presses the cross wrapping strip (3) against the bottom of the lithium battery through a stamping device; meanwhile, the horizontal strip (71) wraps the lithium battery through the shaping rib (14) during the stamping process to form a semi-wrapped lithium battery; S2, the conveying device conveys the engaged upper cross wrapping strip (3) and upper horizontal strip (71) to the top of the semi-wrapped lithium battery after stamping, and presses the upper cross wrapping strip (3) and upper horizontal strip (71) against the surface of the lithium battery through a stamping device to limit the upper and lower packages of the lithium battery to form a height-limited wrapped lithium battery; S3, after the height-limited wrapped lithium battery is conveyed to the fastening position, the plug-in frame (8) is inserted and installed front and back, the output end of the plugging and pressing device sets the value of the pressing pressure sensor, the plug-in frame (8) completes the annular wrapping through the plugging strip (91), completes the efficient combination with the pressure data, and cooperates with the elastic adaptor pad (12) to press against multiple lithium batteries to complete the packaging.

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