Novel bottom supporting plate

Abstract

The utility model relates to a novel bottom supporting plate. The novel bottom supporting plate solves the problems of single flow guide direction and low infiltration rate of a battery bottom supporting plate in the prior art. The bottom supporting plate comprises a bottom tray, a plurality of frameworks which are placed in a disordered track are arranged on the bottom tray and form the battery bottom supporting plate on the bottom tray, the four circumferential sides of the battery bottom supporting plate are kept flush, every two crossed frameworks are positioned through a fixing structure, and a clamping and positioning mechanism is arranged between the ends of the frameworks and the bottom tray. The device has the advantages that the infiltration rate is increased, bubbles can be rapidly removed, the electrolyte diffusion process is not hindered, and the supporting stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a novel bottom support plate. Background Art

[0002] In the existing square battery bottom support plate design, the bottom support plate is a hot-melt design after opening holes, or a punching design after hot-melt bonding with a mylar film. Such a design method will greatly curb the fluidity of the electrolyte / the degree of infiltration of the battery cell; a Chinese patent document discloses a bottom support plate structure of a secondary battery [CN217361860U], comprising a bottom support plate 1, a plurality of bosses 11 arranged from the left side to the right side of the bottom support plate 1, and conductive grooves 12 alternately opened at the front and rear ends of the bosses 11, by setting the bottom support plate 11 as a non-porous structure, and arranging the bosses 11 on the bottom support plate 11, the bosses 11 are used to support the battery cell 2, and the bottom support plate 11 and the battery cell are increased. 2, so that the electrolyte can more easily enter the battery cell 2 from the bottom, thereby increasing the infiltration speed of the electrolyte at the bottom of the battery, and can avoid coating the bottom of the aluminum shell 4, and alternately opening the conducting grooves 12 at both ends of the boss 11, so that the electrolyte can more easily enter the cavity on the back of the boss 11, that is, the battery cell groove 5, which has higher strength than the bottom support plate with grooves on both sides; however, the boss design or the through-hole design disclosed in the patent can only achieve a two-dimensional unidirectional flow diversion effect along the thickness or width direction of the battery cell, and the design of the boss leads to excessive pressure at the chamfer, which is easy to damage the electrode state at the bottom of the battery cell, causing internal short circuit or local overhang. Summary of the invention

[0003] The purpose of the utility model is to provide a new bottom support plate in view of the above problems.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a new type of bottom support plate, including a bottom tray, on which a plurality of skeletons arranged in disordered trajectories are provided, and the plurality of skeletons form a battery bottom support plate on the bottom tray, the four circumferential sides of the battery bottom support plate are kept flush, and the two intersecting skeletons are positioned by a fixed structure, and a clamping positioning mechanism is provided between the end of the skeleton and the bottom tray.

[0005] In the above-mentioned novel bottom support plate, the frame is obtained by extruding a hot-melt material through an extruder.

[0006] In the above-mentioned novel bottom support plate, the hot-melt material is polypropylene or PVP.

[0007] In the above-mentioned novel bottom support plate, the frame is in the shape of a strip, and the frame is arranged in two layers, which are stacked up and down.

[0008] In the above-mentioned novel bottom support plate, there is a bubble exclusion gap between two adjacent frames.

[0009] In the above-mentioned novel bottom support plate, the inner circumferential side of the bottom support plate has a receiving groove for receiving bubbles.

[0010] In the above-mentioned novel bottom support plate, the bottom tray has an overflow opening in the circumference for allowing bubbles to be discharged to the outside.

[0011] In the above-mentioned novel bottom tray, the disordered placement trajectory is pre-set according to the battery specifications.

[0012] In the above-mentioned novel bottom support plate, the frame is spread all over the upper end surface of the bottom tray, and the battery bottom support plate circumferentially covers the edge of the bottom tray.

[0013] In the above-mentioned novel bottom tray, the frames are arranged in two layers in sequence along the length direction and the width direction of the upper end surface of the bottom tray.

[0014] In the above-mentioned new type of bottom tray, the clamping and positioning mechanism includes a positioning clamping hole, a clamping piece, a clamping piece and a connecting rod, wherein the positioning clamping hole is circumferentially arranged on the bottom tray, the clamping piece is arranged on the upper end surface of the frame, and the two ends of the clamping piece are connected with horizontal extension parts, and the connecting rod is arranged at the bottom of the horizontal extension part and is arranged one by one with the positioning clamping hole.

[0015] In the above-mentioned novel bottom support plate, the inner wall of the clamping piece is further provided with an arc-shaped fitting portion.

[0016] In the above-mentioned new type of bottom support plate, the fixing structure includes plug-in holes, a flexible locking portion, an elastic connecting belt and a plug-in column; a plurality of plug-in holes are arranged on the bottom support plate and are arranged in a matrix, the flexible locking portion is arranged at the intersection of any two frames, a plurality of elastic connecting belts are arranged circumferentially on the flexible locking portion, and the elastic connecting belts are provided with plug-in columns arranged corresponding to the plug-in holes.

[0017] Compared with the existing technology, the advantages of the utility model are:

[0018] 1. In the high-temperature wetting stage, the electrode wetting step can be completed quickly, which greatly reduces the time cost and improves the wetting rate;

[0019] 2. In the negative pressure formation stage, bubbles can be quickly removed to make the formed SEI film more uniform;

[0020] 3. During the battery cycle, the electrolyte diffusion process is not hindered;

[0021] 4. Good fixing effect and excellent stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the bottom tray structure in the utility model;

[0024] Figure 3 It is a schematic diagram of the overall structure of the clamping member in the utility model;

[0025] Figure 4 It is a schematic diagram of the fixed structure in the utility model.

[0026] In the figure: bottom tray 1, overflow opening 11, frame 2, battery bottom tray 3, bubble exclusion gap 4, receiving groove 5, fixing structure 6, plug-in hole 61, flexible locking portion 62, elastic connecting belt 63, plug-in column 64, clamping positioning mechanism 7, positioning clamping hole 71, clamping piece 72, horizontal extension portion 73, connecting rod 74, arc-shaped fitting portion 75. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figure 1-4 As shown, a new type of bottom tray includes a bottom tray 1, on which are provided a plurality of skeletons 2 arranged in disordered tracks, and the plurality of skeletons 2 form a battery bottom tray 3 of fixed length, width and thickness on the bottom tray 1, and the battery bottom tray 3 remains flush on four circumferential sides.

[0029] The skeleton 2 is obtained by extruding a hot-melt material through an extruder.

[0030] Furthermore, the hot-melt material is polypropylene or PVP.

[0031] It can be seen that the frame 2 is in a strip shape, and the frame 2 is arranged in two layers, stacked up and down.

[0032] This arrangement can form a three-dimensional skeleton structure, which is convenient for improving the infiltration efficiency.

[0033] Obviously, there are a plurality of bubble-eliminating gaps 4 between two adjacent skeletons 2 .

[0034] The bubble removal gap 4 is used for rapid removal of bubbles.

[0035] Specifically, the bottom tray 1 has a receiving groove 5 on the inner side in the circumferential direction for receiving air bubbles.

[0036] Furthermore, the bottom tray has an overflow opening 11 around its circumference for allowing air bubbles to be discharged to the outside.

[0037] The overflow opening 11 is provided to allow the exhausted air bubbles to flow out, thereby preventing the receiving groove 5 from having insufficient volume.

[0038] More specifically, the disordered placement trajectory is pre-set according to the battery specifications.

[0039] The disordered placement track here can be changed arbitrarily to design different battery bottom bracket 3 styles.

[0040] In detail, the frame 2 is spread all over the upper end surface of the bottom tray 1 , and the battery bottom support plate 3 circumferentially covers the edge of the bottom tray 1 .

[0041] Preferably, the skeletons 2 are placed in two layers in sequence along the length direction and the width direction of the upper end surface of the bottom tray 1 at intervals.

[0042] Among them, the clamping and positioning mechanism 7 includes a positioning clamping hole 71, a clamping piece 72, a clamping piece 72 and a connecting rod 74, wherein the positioning clamping hole 71 is circumferentially arranged on the bottom tray 1, the clamping piece 72 is arranged on the upper end surface of the frame 2, and the two ends of the clamping piece 72 are connected with a horizontal extension part 73, and the connecting rod 74 is arranged at the bottom of the horizontal extension part 73 and is arranged one by one with the positioning clamping hole 71.

[0043] The inner wall of the clamping member 72 is further provided with an arc-shaped fitting portion 75 .

[0044] The clamping and positioning mechanism 7 can be used to lock the ends of the frame 2 to prevent displacement when subjected to force.

[0045] In addition, the fixing structure 6 includes a plug-in hole 61, a flexible locking portion 62, an elastic connecting band 63 and a plug-in column 64; a plurality of plug-in holes 61 are arranged on the bottom tray 1 and are arranged in a matrix, the flexible locking portion 62 is arranged at the intersection of any two frames 2, a plurality of elastic connecting bands 63 are circumferentially arranged on the flexible locking portion 62, and a plug-in column 64 corresponding to the plug-in hole 61 is provided on the elastic connecting band 63.

[0046] The angle and position of each frame 2 can be fixed by the fixing structure 6 .

[0047] In summary, the principle of this embodiment is that a battery bottom tray 3 is formed by using a skeleton 2 stacked in an irregular trajectory on a bottom tray, and the formed battery bottom tray 3 has a plurality of bubble exclusion gaps 4, so that a full infiltration effect can be achieved quickly. At the same time, the angle and position of each skeleton 2 are fixed by a fixing structure 6, and the ends of the skeleton 2 are fixed by a clamping positioning mechanism 7 to ensure stability.

[0048] The wetting time is shortened to half of the original time, which improves efficiency. Compared with the conventional high-temperature static process, it can successfully eliminate the problem of electrolyte inhomogeneity, accelerate the electrode wetting speed, and eliminate excess bubbles.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0050] Although this article uses more terms such as bottom tray 1, overflow opening 11, frame 2, battery bottom support plate 3, bubble removal gap 4, receiving groove 5, fixing structure 6, plug hole 61, flexible locking part 62, elastic connecting belt 63, plug column 64, clamping and positioning mechanism 7, positioning clamp hole 71, clamping member 72, horizontal extension part 73, connecting plug rod 74, arc-shaped fitting part 75, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A novel bottom support plate, comprising a bottom tray (1), characterized in that: The bottom tray (1) is provided with a plurality of frames (2) arranged in a disordered track, and the plurality of frames (2) form a battery bottom tray (3) on the bottom tray (1), the battery bottom tray (3) is kept flush on four sides in a circumferential direction, and two intersecting frames (2) are positioned by a fixing structure (6), and a clamping positioning mechanism (7) is provided between the ends of the frames (2) and the bottom tray (1).

2. A new type of bottom support plate according to claim 1, characterized in that: The skeleton (2) is obtained by extruding a hot-melt material through an extruder, and the hot-melt material is polypropylene or PVP.

3. A new type of bottom support plate according to claim 1, characterized in that: The frame (2) is strip-shaped, and the frame (2) is arranged in two layers, stacked one above the other.

4. A new type of bottom support plate according to claim 1, characterized in that: There is a bubble exclusion gap (4) between two adjacent ones of the skeletons (2).

5. A novel bottom support plate according to claim 1, characterized in that: The bottom tray (1) has a receiving groove (5) on the inner side thereof for receiving bubbles, and the bottom tray (1) has an overflow opening (11) on the inner side thereof for allowing bubbles to be discharged to the outside.

6. A novel bottom support plate according to claim 1, characterized in that: The frame (2) is spread over the upper end surface of the bottom tray (1), and the battery bottom support plate (3) circumferentially covers the edge of the bottom tray (1).

7. A novel bottom support plate according to claim 1, characterized in that: The skeleton (2) is placed in two layers in sequence along the length direction and the width direction of the upper end surface of the bottom tray (1).

8. A novel bottom support plate according to claim 1, characterized in that: The clamping and positioning mechanism (7) comprises a positioning clamping hole (71), a clamping piece (72), a clamping piece (72) and a connecting rod (74), wherein the positioning clamping hole (71) is circumferentially arranged on the bottom tray (1), the clamping piece (72) is arranged on the upper end surface of the frame (2), and both ends of the clamping piece (72) are connected to horizontal extension parts (73), and the connecting rod (74) is arranged at the bottom of the horizontal extension part (73) and is arranged one-to-one with the positioning clamping hole (71).

9. A new type of bottom support plate according to claim 8, characterized in that: The inner wall of the clamping piece (72) is further provided with an arc-shaped fitting portion (75).

10. A new type of bottom support plate according to claim 9, characterized in that: The fixing structure (6) comprises a plug-in hole (61), a flexible locking portion (62), an elastic connecting belt (63) and a plug-in column (64); a plurality of the plug-in holes (61) are arranged on the bottom tray (1) and are arranged in a matrix, the flexible locking portion (62) is arranged at the intersection of any two frames (2), a plurality of elastic connecting belts (63) are arranged circumferentially around the flexible locking portion (62), and plug-in columns (64) are arranged on the elastic connecting belt (63) corresponding to the plug-in holes (61).

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