A battery current collector strength detection mold and detection method thereof

Abstract

The present invention discloses a battery collector strength detection mold and a detection method thereof, including a grid formed by an ear, an outer frame, a plurality of transverse ribs, and a plurality of vertical ribs connected in an integral manner, and also including a lower die and an upper convex mold, wherein the upper surface of the lower die is provided with a plurality of vertical and parallel arc detection grooves, and a vertical positioning boss is provided between each two adjacent arc detection grooves; the lower surface of the upper convex mold is provided with a plurality of vertical and parallel arc detection convex blocks, and a vertical positioning groove is provided between each two adjacent arc detection convex blocks, and the lower die matches the upper convex mold. It can be seen from the structure of the present invention that the grid is embedded into the lower die through the detection mold, and then pressed in through the upper convex mold, and finally the number of broken transverse ribs is checked. If it reaches more than 5% of the number of all transverse ribs, it is judged as unqualified, that is, there are pores or brittle cracks at the connection points between the transverse ribs and the vertical ribs, and the production process needs to be adjusted. Otherwise, it is qualified.

Description

Technical Field

[0001] The invention relates to the field of battery grid detection, and in particular to a battery collector strength detection mold and a detection method thereof. Background Art

[0002] A battery is a device that converts chemical energy directly into electrical energy. It is a battery designed to be rechargeable and is recharged through a reversible chemical reaction. The main components of a battery are plates, which are composed of grids (also known as current collectors) and lead paste. The grids are mainly composed of tabs, frame ribs, inner frame horizontal ribs and vertical ribs. Existing grids usually adopt a structure in which the horizontal ribs and vertical ribs are perpendicular to each other. The horizontal ribs of the grid mainly play the role of conducting current, and the vertical ribs mainly play the role of supporting the lead paste.

[0003] At present, the grid adopts gravity casting technology. In this process, stress points, shrinkage points, air holes and brittle cracks are easily generated at the connection points of the horizontal and vertical ribs. These undesirable phenomena are not easy to detect, especially for the horizontal ribs that play a conductive role. These will cause the ribs to be not corrosion-resistant, and ultimately greatly shorten the battery life. Summary of the invention

[0004] The purpose of the present invention is to provide a battery collector strength detection mold and a detection method thereof, so as to overcome the defects of the prior art and solve the problem that in the grid gravity casting process, stress points, shrinkage points and pores are easily generated at the connection points of the horizontal ribs and the vertical ribs, resulting in the ribs being not corrosion-resistant and the battery life being greatly shortened.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A battery current collector strength detection mold and detection method thereof, comprising a grid formed by integrally connecting a pole ear, an outer frame, a plurality of transverse ribs, and a plurality of vertical ribs, and further comprising a lower concave mold and an upper convex mold, wherein the upper surface of the lower concave mold is provided with a plurality of vertical and parallel arc-shaped detection grooves, and a vertical positioning boss is provided between every two adjacent arc-shaped detection grooves;

[0007] The lower surface of the upper punch is provided with a plurality of arc-shaped detection bumps arranged vertically and in parallel, a vertical positioning groove is provided between every two adjacent arc-shaped detection bumps, and the lower concave mold matches the upper punch.

[0008] Furthermore, a pole ear is provided on the right side of the outer frame, and the horizontal ribs and the vertical ribs are perpendicular to each other and connected inside the outer frame;

[0009] Each of the vertical positioning bosses is provided with a vertical rib groove and a plurality of transverse rib node slots, the outer circumference of the vertical rib groove is connected to an outer frame groove, and the right end of the outer frame groove is connected to a pole ear groove;

[0010] When the lower die and the upper punch are squeezed together, the tabs are matched and embedded in the tab grooves, the transverse ribs and the vertical ribs are matched and embedded in the transverse rib node grooves and the vertical rib grooves, and the outer frame is matched and embedded in the outer frame groove.

[0011] Furthermore, two limiting bases are symmetrically provided at the inner edges of the outer frame groove openings on the left and right sides, and the limiting bases are provided with transverse rib grooves.

[0012] Furthermore, the bottom depths of the vertical rib grooves, transverse rib node grooves, outer frame grooves, and pole lug grooves are the same, and when the grid is embedded in the lower die, that is, the pole lug, outer frame, transverse ribs, and vertical ribs are respectively embedded in the pole lug grooves, outer frame grooves, transverse rib node grooves, and vertical rib grooves, a gap is left between the pole lug, outer frame, transverse ribs, vertical ribs and the upper surface of the lower die.

[0013] Furthermore, when the upper punch is pressed into the lower die, the vertical positioning boss is just embedded in the vertical positioning groove, and the arc-shaped detection convex block is just embedded in the arc-shaped detection groove and presses the transverse rib to the bottom of the arc-shaped detection groove.

[0014] Furthermore, a pressure handle is integrally connected to the top of the upper punch.

[0015] A method for detecting a battery current collector strength detection mold, comprising:

[0016] Step 1: Select the matching detection mold according to the specifications of different grid pairs;

[0017] Step 2: Randomly select 10 grids from the grid pile, and place the single grid in the lower die while keeping the lower die level;

[0018] Step 3: Align the upper punch with the lower concave film and press the upper punch downward into the lower concave die. During this process, the horizontal ribs of the grid are extended under the force of the arc surface of the arc detection convex block until they fit the arc detection groove;

[0019] Step 4: Take out the grid and observe the transverse ribs. If the broken transverse ribs account for more than 5% of all transverse ribs, the grid strength is judged to be unqualified, that is, there are air holes or brittle cracks in the connection points of the transverse and vertical ribs, and process adjustments are required.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention provides a battery current collector strength detection mold and a detection method thereof, wherein the arc-shaped detection groove matches the arc-shaped detection convex block, and the vertical positioning boss matches the vertical positioning groove. When the upper punch is pressed into the lower die, the vertical positioning boss is just embedded in the vertical positioning groove, and the arc-shaped detection convex block is just embedded in the arc-shaped detection groove and presses the transverse rib to the bottom of the arc-shaped detection groove.

[0022] 2. The present invention provides a battery collector strength detection mold and a detection method thereof, wherein each vertical positioning boss is provided with a vertical rib groove and a plurality of transverse rib node grooves, and all transverse rib node grooves are distributed in multiple rows horizontally and combined with multiple columns of vertical rib grooves, which just match the transverse ribs and the vertical ribs to fix the position of the entire grid on the lower concave mold.

[0023] 3. The present invention provides a battery collector strength detection mold and a detection method thereof, wherein two limit bases are symmetrically provided at the inner edges of the outer frame grooves on the left and right sides, and cross rib grooves are provided on the limit bases to support the positions of the left and right end heads of the cross ribs (i.e., the connection between the cross ribs and the outer frame) to ensure that when the upper punch is pressed down, the stress conditions at the two end heads of the cross ribs are the same as the stress conditions of the cross ribs in the adjacent cross rib node grooves on the inner sides of the corresponding end heads, thereby further ensuring the accuracy of the detection data and improving the stability of the entire detection mold.

[0024] 4. The present invention provides a battery collector strength detection mold and a detection method thereof. When the pole ear, outer frame, transverse ribs and vertical ribs are respectively embedded in the pole ear groove, outer frame groove, transverse rib node groove and vertical rib groove, a gap is left between the pole ear, outer frame, transverse ribs, vertical ribs and the upper surface of the lower die. In this way, when the upper punch is pressed into the lower die, the existence of the gap provides sufficient deformation space for the transverse ribs, that is, a buffer zone is provided for the transverse ribs in the transverse rib node grooves, to prevent the transverse ribs in the transverse rib node grooves from being unable to deform when the upper punch is pressed downward, resulting in forced rupture of the transverse ribs, thereby reducing the accuracy of the detection data.

[0025] 5. The present invention provides a battery current collector strength detection mold and detection method thereof, wherein a pressure handle is integrally connected to the top of the upper punch to facilitate application of force to the upper punch.

[0026] 6. The present invention provides a battery current collector strength detection mold and a detection method thereof. The grid is embedded into the lower concave mold through the detection mold, and then pressed in by the upper punch. Finally, the number of broken transverse ribs is checked. If it reaches more than 5% of the number of all transverse ribs, it is judged as unqualified, that is, there are stress points, shrinkage points, pores or brittle cracks at the connection points of the transverse ribs and the vertical ribs, and the production process needs to be adjusted. Otherwise, it is qualified.

[0027] 7. The battery collector strength detection mold and detection method provided by the present invention have a simple structure and a convenient and quick operation method. They can detect the strength of the grid cross ribs, ensure the grid quality, and greatly extend the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a top view of the lower die structure of the present invention.

[0029] Figure 2 It is a top view of the grid structure of the present invention.

[0030] Figure 3 It is a top view of the structure of the plate grid of the present invention when it cooperates with the lower concave mold.

[0031] Figure 4 It is the structural front view of the upper punch of the present invention.

[0032] Figure 5 It is a schematic diagram of the main cross-section when the grid of the present invention cooperates with the lower concave die and the upper punch is ready to press down.

[0033] Figure 6 It is a schematic diagram of the main cross-section when the grid of the present invention cooperates with the lower concave die and the upper convex die is pressed in.

[0034] In the figure, 1 is a grid, 11 is a pole ear, 12 is an outer frame, 13 is a horizontal rib, 14 is a vertical rib, 2 is a lower concave die, 3 is an upper convex die, 4 is an arc-shaped detection groove, 5 is a vertical positioning boss, 51 is a vertical rib groove, 52 is a horizontal rib node slot, 53 is an outer frame slot, 54 is a pole ear slot, 55 is a limiting base, 56 is a horizontal rib slot, 6 is an arc-shaped detection convex block, 7 is a vertical positioning groove, and 8 is a spacer. DETAILED DESCRIPTION

[0035] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0036] Example 1: Figures 1 to 6 A battery collector strength detection mold and detection method shown in the figure include a grid 1 formed by an ear 11, an outer frame 12, multiple horizontal ribs 13, and multiple vertical ribs 14 connected in one piece, and also include a lower die 2 and an upper punch 3. The upper surface of the lower die 2 is provided with multiple vertical and parallel arc detection grooves 4, and a vertical positioning boss 5 is provided between every two adjacent arc detection grooves 4; the lower surface of the upper punch 3 is provided with multiple vertical and parallel arc detection bumps 6, and a vertical positioning groove 7 is provided between every two adjacent arc detection bumps 6. The lower die 2 matches the upper punch 3.

[0037] A pole ear 11 is provided on the right side of the outer frame 12, and the horizontal ribs 13 and the vertical ribs 14 are perpendicular to each other and connected inside the outer frame 12; each of the vertical positioning bosses 5 is provided with a vertical rib groove 51 and a plurality of horizontal rib node slots 52, the outer circumference of the vertical rib groove 51 is connected with the outer frame groove 53, and the right end of the outer frame groove 53 is connected with the pole ear groove 54; when the lower die 2 and the upper punch 3 are squeezed together, the pole ear 11 is matched and embedded in the pole ear groove 54, the horizontal ribs 13 and the vertical ribs 14 are matched and embedded in the horizontal rib node slots 52 and the vertical rib grooves 51, and the outer frame 12 is matched and embedded in the outer frame groove 53; two limiting bases 55 are symmetrically provided along the inner edges of the notch of the outer frame groove 53 on the left and right sides, and the limiting bases 55 are provided with horizontal rib slots 56; the bottom depths of the vertical rib grooves 51, the transverse rib node grooves 52, the outer frame grooves 53, and the pole ear grooves 54 are the same, and when the grid 1 is embedded in the lower die 2, that is, the pole ear 11, the outer frame 12, the transverse ribs 13, and the vertical ribs 14 are respectively embedded in the pole ear grooves 54, the outer frame grooves 53, the transverse rib node grooves 52, and the vertical rib grooves 51, a gap 8 is left between the pole ear 11, the outer frame 12, the transverse ribs 13, the vertical ribs 14 and the upper surface of the lower die 2; when the upper punch 3 is pressed into the lower die 2, the vertical positioning boss 5 is just embedded in the vertical positioning groove 7, and the arc detection convex block 6 is just embedded in the arc detection groove 4 and presses the transverse rib 13 to the bottom of the arc detection groove 4; the top of the upper punch 3 is integrally connected with a pressing handle 32.

[0038] The operating method of the present invention is as follows:

[0039] Step 1: Select the matching detection mold according to the specifications of different grid pairs;

[0040] Step 2: randomly select 10 pieces from the grid 1 pile, and place the single grid 1 in the lower concave mold 2 and keep the lower concave mold 2 horizontal;

[0041] Step 3: Align the upper punch 3 with the lower concave film 2 and press the upper punch 3 downward into the lower concave die 2. During the process, the transverse ribs 13 of the grid 1 extend under the force of the arc surface of the arc detection convex block 6 until they fit with the arc detection groove 4.

[0042] Step 4: Take out the grid 1 and observe the transverse ribs 13. If the broken transverse ribs 13 account for more than 5% of all the transverse ribs 13, it is determined that the strength of the grid 1 is unqualified, that is, there are pores or brittle cracks at the connection points of the transverse ribs 13 and the vertical ribs 14, and process adjustments are required.

Claims

1. A battery current collector strength testing mold, comprising a grid (1) formed by integrally connecting a pole ear (11), an outer frame (12), a plurality of transverse ribs (13), and a plurality of vertical ribs (14), characterized in that: The mold further comprises a lower die (2) and an upper punch (3), wherein the upper surface of the lower die (2) is provided with a plurality of arc-shaped detection grooves (4) arranged vertically and in parallel, and a vertical positioning boss (5) is provided between every two adjacent arc-shaped detection grooves (4); the lower surface of the upper punch (3) is provided with a plurality of arc-shaped detection convex blocks (6) arranged vertically and in parallel, and a vertical positioning groove (7) is provided between every two adjacent arc-shaped detection convex blocks (6); the lower die (2) matches the upper punch (3), and the right side of the outer frame (12) is provided with a pole ear (11), and a transverse rib (13) is provided. ) and the vertical ribs (14) are mutually perpendicular and connected in the outer frame (12); each of the vertical positioning bosses (5) is provided with a vertical rib groove (51) and a plurality of transverse rib node slots (52); the outer circumference of the vertical rib groove (51) is connected to the outer frame groove (53); the right end of the outer frame groove (53) is connected to the pole ear groove (54); when the lower die (2) and the upper punch (3) are squeezed together, the pole ear (11) is matched and embedded in the pole ear groove (54), and the transverse ribs (13) and the vertical ribs (14) are matched and embedded in the transverse rib node slots (52) and the vertical ribs (14). In the rib groove (51), the outer frame (12) is matched and embedded in the outer frame groove (53), and two limiting bases (55) are symmetrically provided at the inner edges of the groove opening of the outer frame groove (53) on the left and right sides, and the limiting bases (55) are provided with a transverse rib groove (56). The vertical rib groove (51), the transverse rib node groove (52), the outer frame groove (53), and the pole ear groove (54) have the same groove bottom depth, and when the grid (1) is embedded in the lower concave mold (2), that is, the pole ear (11), the outer frame (12), the transverse rib (13), and the vertical rib (14) are respectively When the pole lugs (11), the outer frame grooves (53), the transverse rib node slots (52), and the vertical rib grooves (51) are respectively embedded in the pole lug grooves (54), the outer frame grooves (53), the transverse rib node slots (52), and the vertical rib grooves (51), a gap (8) is left between the pole lugs (11), the outer frame grooves (12), the transverse ribs (13), the vertical ribs (14) and the upper surface of the lower die (2). When the upper convex mold (3) is pressed into the lower die (2), the vertical positioning boss (5) is just embedded in the vertical positioning groove (7), and the arc detection convex block (6) is just embedded in the arc detection groove (4) and presses the transverse rib (13) to the bottom of the arc detection groove (4).

2. A battery current collector strength detection mold according to claim 1, characterized in that: A pressing handle (32) is integrally connected to the top of the upper punch (3).

3. A method for testing a battery current collector strength testing mold according to any one of claims 1 to 2, characterized in that: Step 1: Select a matching detection mold according to the specifications of different grids (1); Step 2: randomly select 10 pieces from the grid (1) pile, and place the single grid (1) in the lower concave mold (2) while keeping the lower concave mold (2) horizontal; Step 3: Align the upper punch (3) with the lower die (2), and press the upper punch (3) downward into the lower die (2). During this process, the transverse ribs (13) of the grid (1) are extended under the force of the arc surface of the arc detection convex block (6) until they fit into the arc detection groove (4); Step 4: Take out the grid (1) and observe the transverse ribs (13). If the broken transverse ribs (13) account for more than 5% of all the transverse ribs (13), it is determined that the strength of the grid (1) is unqualified, that is, there are pores or brittle cracks at the connection points between the transverse ribs (13) and the vertical ribs (14), and process adjustment is required.

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