A tab shaping chemical formation fixture and chemical formation equipment

Abstract

This invention discloses a tab-forming and forming fixture, comprising: a PCB board for supplying power to the battery cell body; a pressure block connected to the PCB board, with a gap between the pressure block and the PCB board for clamping the tabs of the battery cell body; and a gap adjustment mechanism for adjusting the size of the gap. The tab-forming and forming fixture of this invention can better adapt to battery cells with different tab thicknesses and has a tab-forming function. This invention also provides a forming device.

Description

Technical Field

[0001] This invention relates to the field of battery formation and capacity testing, and particularly to a tab shaping and formation fixture and formation equipment. Background Technology

[0002] In the existing battery production process, the produced batteries need to undergo a formation and capacity testing process. This process allows the active materials in the batteries to be converted into chemical substances with normal electrochemical functions during the first charge. The batteries are then sorted and differentiated according to their capacity to facilitate subsequent packaging.

[0003] In existing formation and capacity testing equipment, the tabs of the battery cell are generally sandwiched between a PCB board and a pressure plate. Power is supplied to the battery cell through the conductive area set on the PCB board. Since the spacing between the PCB board and the pressure plate is fixed, the existing formation and capacity testing equipment can only adapt to tabs of a certain thickness. When the thickness of the tab changes or there is a drop in the thickness direction of the tab, the tab is easily bent after the PCB board is pressed together, resulting in the scrapping of the battery cell. At the same time, the existing formation and capacity testing equipment does not have the function of tab shaping. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a tab-shaping formation fixture and formation equipment, which can better adapt to cells with different tab thicknesses and has a tab-shaping function.

[0005] According to one aspect of the present invention, a tab forming fixture includes: a PCB board for supplying power to a battery cell body; a pressure block connected to the PCB board, wherein a gap is provided between the pressure block and the PCB board for clamping the tabs of the battery cell body; and a gap adjustment mechanism for adjusting the size of the gap.

[0006] According to another aspect of the formation apparatus of the present invention, a base and a plurality of tab forming formation fixtures are included, wherein the tab forming formation fixtures are the aforementioned tab forming formation fixtures; the PCB board and the pressure block are both connected to the base.

[0007] Furthermore, the formation equipment includes multiple tab forming fixtures arranged sequentially, and a guide rail is provided on the base, with multiple guide components passing through the guide rail.

[0008] Furthermore, a pressing screw and a pressing plate are rotatably mounted on the machine base. A nut that is threadedly engaged with the pressing screw is connected to the pressing plate. Under the drive of the pressing screw, the pressing plate can clamp multiple tabs with the machine base to form a fixture.

[0009] Furthermore, an elastic element is provided between the pressing plate and the tab shaping fixture.

[0010] Furthermore, a gear set is provided on the machine base, which is used to drive the pressing screw to rotate.

[0011] Furthermore, a lifting rod is provided on the base, which passes through multiple first drive units. The lifting rod can simultaneously drive multiple first sliders to rise and fall, thereby causing multiple PCB boards to rise and fall.

[0012] Furthermore, a first lead screw is provided on the base, and a first nut that is threadedly engaged with the first lead screw is provided on the first lead screw. The first nut is connected to the lifting rod.

[0013] Furthermore, a translation rod is provided on the base, which passes through multiple second drive units. The translation rod can simultaneously drive multiple second sliders to rise and fall, causing multiple PCB boards to move back and forth.

[0014] Furthermore, a second lead screw is provided on the machine base, and a second nut that is threadedly engaged with the second lead screw is provided on the second lead screw. The second nut is connected to the translation rod.

[0015] Furthermore, a chain is provided on the base, and multiple pressure blocks are connected to the chain.

[0016] When using the tab forming fixture of the present invention, the battery cell body can be placed between the PCB board and the pressure block first. Then, the spacing adjustment mechanism is controlled to adjust the size of the gap between the tabs used to clamp the battery cell body, so that the tabs can be clamped without bending them. Then, the PCB board is powered on to form the battery cell body into capacity. When it is necessary to shape the tabs, the size of the gap can be further adjusted by the spacing adjustment mechanism to complete the shaping of the tabs.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is an axonometric view of the tab shaping fixture according to an embodiment of the present invention;

[0020] Figure 2 This is a front view of the tab shaping fixture according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Sectional axonometric view along the central AA direction;

[0022] Figure 4 This is an isometric view of the pressure block according to an embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional isometric view of the formation apparatus according to an embodiment of the present invention;

[0024] Figure 6 This is a top view of the chemical formation apparatus according to an embodiment of the present invention;

[0025] Figure 7 for Figure 6 A sectional view along the EE direction;

[0026] Figure 8 for Figure 5 Enlarged view of section I in the middle.

[0027] The above figures include the following reference numerals:

[0028]

[0029] Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0034] Reference Figure 5 , Figure 6The present invention provides a formation apparatus, which includes a tab forming formation fixture 100 and a base 200.

[0035] like Figures 1-3 As shown, according to one aspect of this embodiment, the tab forming fixture 100 includes: a PCB board 120 for supplying power to the battery cell body 700; a pressure block 110 connected to the PCB board 120, with a gap between the pressure block 110 and the PCB board 120 for clamping the tabs of the battery cell body 700; and a gap adjustment mechanism for adjusting the size of the gap.

[0036] When using the tab forming fixture 100 of the present invention, the battery cell body 700 can be placed between the PCB board 120 and the pressure block 110. Then, the gap adjustment mechanism is controlled to adjust the size of the gap between the tabs used to clamp the battery cell body 700, so that the tabs can be clamped without bending them. Then, the PCB board 120 is energized to form the battery cell body 700. When it is necessary to shape the tabs, the gap size can be further adjusted by the gap adjustment mechanism to complete the shaping of the tabs.

[0037] The connection between the pressure block 110 and the PCB board 120 can be either a contact connection or a non-contact connection. When the connection between the pressure block 110 and the PCB board 120 is a contact connection, the PCB board 120 can be connected to the pressure block 110 by means of fasteners, adhesives, etc. Alternatively, the PCB board 120 and the pressure block 110 can be connected to the frame respectively, so that a gap for clamping the tabs can be maintained between the PCB board 120 and the pressure block 110. When the connection between the pressure block 110 and the PCB board 120 is a non-contact connection, the PCB board 120 can be attracted to the pressure block 110 by a magnetic structure.

[0038] Here, the gap adjustment mechanism can also adjust the gap size in a variety of ways; for example, a wedge can be inserted between the pressure block 110 and the PCB board 120, and the gap between the PCB board 120 and the pressure block 110 can be controlled by the depth of the wedge insertion; a screw, piston or other drive mechanism can also be set on the pressure plate to control the position of the PCB board 120; a spring can also be set on the PCB board 120 and a magnetic attraction structure can be set on the pressure block 110, and the position of the PCB board 120 can be controlled by the magnetic force and the elastic force of the spring.

[0039] like Figure 3 , Figure 4 As shown, it also includes a first inclined slider 143, on which a first inclined surface is provided, and a second inclined surface 111 is provided on the pressure block 110. The first inclined surface and the second inclined surface 111 abut against each other, and the first inclined slider abuts against the PCB board 120.

[0040] The cooperation of the first inclined plane and the second inclined plane 111 can convert the lifting motion of the first inclined slider 143 into the horizontal motion of the PCB board 120, thereby changing the gap size of the tabs used to clamp the battery cell body 700. When the angle between the inclined plane and the vertical direction is small, the PCB board 120 will only move slightly when the first inclined slider rises a certain distance, which is convenient for fine-tuning the gap to micro-shape the tabs. The first inclined slider can be driven manually or automatically.

[0041] like Figure 1 As shown, the first inclined plane and the second inclined plane 111 referred to in this embodiment are planes that are not perpendicular to the vertical direction and the front-back direction.

[0042] To facilitate automatic adjustment of the gap, a second slider 141 is slidably connected to the pressure block 110. The second slider 141 is connected to the first inclined slider. At this time, the gap can be adjusted simply by sliding the second slider 141 on the pressure block 110.

[0043] like Figure 6 As shown, the second slider 141 is provided with a first driving part 132, which is used to connect translation. At this time, the size of the gap can be adjusted by adjusting the up and down position of the translation rod 412.

[0044] like Figures 1-3 As shown, a first slider 131 is slidably connected to the pressure block 110, and the first slider 131 is connected to the PCB board 120. Specifically, the PCB board 120 is provided with a first pressing area 121 and a second pressing area 122 at intervals. The first pressing area 121 and the second pressing area 122 are respectively connected to the two tabs of the battery cell body 700 for charging the battery cell body 700. The width of the first pressing area 121 and the second pressing area 122 is greater than the width of the tabs. When it is necessary to clamp batteries with different tab spacing, it is only necessary to adjust the up and down position of the PCB board 120 by driving the first slider 131 so that the first pressing area 121 and the second pressing area 122 press the two tabs respectively.

[0045] like Figure 2 , Figure 7 As shown, in order to facilitate the sliding of the first slider 131, a first driving part 132 is provided on the first slider 131, and the first driving part 132 is used to connect the lifting rod 411.

[0046] like Figure 1 As shown, in order to facilitate the installation of the battery cell body 700, a guide component 150 is provided on the pressure block 110. The guide component 150 is used to provide sliding guidance when installing the battery cell body 700.

[0047] Specifically, in order to detect the temperature of the battery cell body 700 during the capacity test, a temperature sensing component 160 can be installed on the pressure block 110. The temperature sensing component 160 can be a temperature sensing probe or thermistor, which are already available in the prior art.

[0048] In order to enable the single electrode to be shaped into a clamp 100 that can hold the electrodes of two battery cell bodies 700, PCB boards 120 are provided on both the left and right sides of the pressure block 110.

[0049] To ensure that the multiple tab forming fixtures 100 are stably set on the frame, guide members 170 can be connected to the pressure block 110, and guide rails 210 can be set on the frame, with guide members 170 fitted with guide rails 210.

[0050] like Figures 5-8 According to a second aspect of the present invention, a formation apparatus includes a base 200 and a plurality of tab forming formation fixtures 100, wherein the tab forming formation fixtures 100 are the aforementioned tab forming formation fixtures 100; the PCB board 120 and the pressure block 110 are both connected to the base 200.

[0051] When using the formation equipment of the present invention, the battery cell body 700 can be placed between the PCB board 120 and the pressure block 110. Then, the spacing adjustment mechanism is controlled to adjust the size of the gap between the tabs used to clamp the battery cell body 700, so that the tabs can be clamped without bending them. Then, the PCB board 120 is energized to form and form the battery cell body 700. When it is necessary to shape the tabs, the size of the gap can be further adjusted by the spacing adjustment mechanism to complete the shaping of the tabs. At the same time, since the formation equipment is equipped with multiple tab shaping and formation fixtures 100, multiple battery cell bodies 700 can be formed and formed at one time.

[0052] Connectors can be provided to drive the first slider 131 and / or the second slider 141 of the multiple tab shaping fixtures 100 automatically or manually, so as to uniformly control the gap control and tab micro-shaping of the multiple tab shaping fixtures 100.

[0053] Among them, such as Figure 5 , Figure 6 , Figure 8 As shown, in order to facilitate the arrangement of multiple tab forming fixtures 100 on the base 200, multiple tab forming fixtures 100 can be arranged sequentially on the base 200, and guide rails 210 are provided on the base 200, with the guide rails 210 passing through the guide members 170 of the multiple tab forming fixtures 100.

[0054] like Figure 5 , Figure 6As shown, in order to prevent the tab forming fixture 100 from sliding uncontrollably in the front-to-back direction during the formation and capacity preparation process, thus affecting production, a pressing screw 310 and a pressing plate 320 are rotatably mounted on the machine base 200. A nut that is threadedly engaged with the pressing screw 310 is connected to the pressing plate 320. Under the drive of the pressing screw 310, the pressing plate 320 can clamp multiple tab forming fixtures 100 with the machine base 200.

[0055] The lead screw rotates, driving the nut to slide forward, which in turn drives the pressing plate 320 to slide forward, forcing the multiple tabs between the pressing plate 320 and the base 200 to be shaped into clamps 100 and pressed together.

[0056] The pressing screw 310 can drive the nut by manual rotation. The pressing screw 310 can be connected to drive components such as motors, pneumatic motors or hydraulic motors to realize automatic control of the pressing plate 320.

[0057] like Figure 5 As shown, in order to prevent excessive impact on the pressing screw 310 and the tab forming fixture 100 during pressing by the pressing plate 320, which could damage the equipment, an elastic element 340 is provided between the pressing plate 320 and the tab forming fixture 100; when the pressing plate 320 presses multiple tab forming fixtures 100, the elastic element 340 can play a buffering role; wherein the elastic element 340 is preferably a compression spring.

[0058] To facilitate the driving of the multiple pressing screws 310 mounted on the base 200, a gear set 330 can be installed on the base 200. The torque of a single motor can be transmitted to the multiple pressing screws 310 via the gear set 330, effectively reducing the cost associated with installing multiple pressing screw drive components.

[0059] like Figures 5-7 As shown, a lifting rod 411 is provided on the base 200. The lifting rod 411 passes through multiple first drive units 132. The lifting rod 411 can simultaneously drive multiple first sliders 131 to rise and fall, thereby causing multiple PCB boards 120 to rise and fall. When the lifting rod 411 rises, it can simultaneously drive multiple PCB boards 120 of the tab forming fixture 100 to rise, realizing unified control of the rise and fall of multiple PCB boards 120 of the tab forming fixture 100. The lifting rod 411 can be controlled to rise and fall in various ways, such as manually controlling the lifting rod 411 to rise and fall, or using a linear motor, cylinder or other drive device on the base 200 to drive the lifting rod 411 to rise and fall.

[0060] like Figure 7As shown, in order to facilitate the fine adjustment of the lifting position of the lifting rod 411, a first lead screw 421 is provided on the base 200. A first nut is provided on the first lead screw 421 and threadedly engaged with it. The first nut is connected to the lifting rod 411. When the first lead screw 421 rotates, the nut on the first lead screw 421 will only drive the lifting rod 411 to rise and fall slowly, which greatly facilitates the fine adjustment of the position of the lifting rod 411. The first lead screw 421 can be rotated by manual turning or by being driven by a motor, pneumatic motor or other means.

[0061] like Figure 5 , Figure 7 As shown, a translation rod 412 is provided on the base 200. The translation rod 412 passes through multiple second drive units 142. The translation rod 412 can simultaneously drive multiple second sliders 141 to rise and fall, so that multiple PCB boards 120 move back and forth. During the formation and capacity formation process, only the rise and fall of the translation rod 412 needs to be controlled to simultaneously adjust the rise and fall of the second sliders 141 in multiple tab forming fixtures 100, so as to achieve the same control of the gap in multiple tab forming fixtures 100.

[0062] Similarly, such as Figure 7 As shown, in order to facilitate the fine adjustment of the lifting position of the translation rod 412, a second lead screw 422 is provided on the base 200. A second nut is provided on the second lead screw 422 and threadedly engaged with it. The second nut is connected to the translation rod 412. When the second lead screw 422 rotates, the nut on the second lead screw 422 will only drive the translation rod 412 to rise and fall slowly, which greatly facilitates the fine adjustment of the position of the translation rod 412. The second lead screw 422 can be rotated by manual turning or by being driven by a motor, pneumatic motor, or other means.

[0063] like Figure 5 , Figure 7 As shown, a chain 430 can be installed on the base 200 to connect the pressure block 110 of the clamp 100, which is shaped into multiple tabs, to the chain 430.

[0064] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A fixture for shaping electrode tabs, characterized in that, include: PCB board (120) is used to supply power to the battery cell body (700); A pressure block (110) is connected to the PCB board (120), and there is a gap between the pressure block (110) and the PCB board (120) for clamping the tabs of the battery cell body (700); A spacing adjustment mechanism is used to adjust the size of the gap; The spacing adjustment mechanism includes a first inclined slider (143), and a second slider (141) is slidably connected to the pressure block (110). The second slider (141) is connected to the first inclined slider (143), and sliding the second slider (141) drives the first inclined slider (143) to rise and fall. The pressure block (110) is slidably connected to a first slider (131), which is connected to the PCB board (120). The vertical position of the PCB board (120) can be adjusted by driving the first slider (131). The first inclined slider (143) is provided with a first inclined surface, and the pressure block (110) is provided with a second inclined surface (111). The first inclined surface and the second inclined surface (111) abut against each other and are both surfaces that are not perpendicular to the vertical direction and the front-back direction. The first inclined slider (143) abuts against the PCB board (120).

2. A chemical formation device, characterized in that, It includes a base (200) and a plurality of tab forming fixtures (100), wherein the tab forming fixtures (100) are the tab forming fixtures (100) as described in claim 1, and the PCB board (120) and the pressure block (110) are both connected to the base (200); The base (200) is provided with a translation rod (412), which can simultaneously drive multiple second sliders (141) to rise and fall, so that multiple PCB boards (120) move back and forth.

3. The chemical formation equipment according to claim 2, characterized in that, The device includes multiple electrode shaping fixtures (100) arranged in a front-to-back sequence, a guide member (170) connected to the pressure block (110), a guide rail (210) provided on the base (200), and multiple guide members (170) passing through the guide rail (210).

4. The chemical formation equipment according to claim 3, characterized in that, A pressing screw (310) and a pressing plate (320) are rotatably mounted on the base (200). A nut that is threadedly engaged with the pressing screw (310) is connected to the pressing plate (320). The pressing plate (320) can clamp multiple tabs into a shaping fixture (100) with the base (200) under the drive of the pressing screw (310).

5. The chemical formation equipment according to claim 4, characterized in that, An elastic element (340) is provided between the pressing plate (320) and the tab forming fixture (100).

6. The chemical formation equipment according to claim 4, characterized in that, The base (200) is provided with a gear set (330), which is used to drive the pressing screw (310) to rotate.

7. The chemical formation equipment according to claim 2, characterized in that, The base (200) is provided with a lifting rod (411), which can simultaneously drive multiple first sliders (131) to rise and fall, thereby causing multiple PCB boards (120) to rise and fall.

8. The chemical formation equipment according to claim 7, characterized in that, The base (200) is provided with a first lead screw (421), and the first lead screw (421) is provided with a first nut that is threadedly engaged with the first lead screw (421). The first nut is connected to the lifting rod (411).

9. The chemical formation equipment according to claim 2, characterized in that, The base (200) is provided with a second lead screw (422), and the second lead screw (422) is provided with a second nut that is threadedly engaged with the second lead screw (422). The second nut is connected to the translation rod (412).

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