Novel prismatic battery cell fixture

Abstract

A prismatic battery cell fixture, comprising: a base (1) and side plates (2). The two side plates (2) are symmetrically arranged on both sides of the upper part of the base (1); the side plates (2) are detachably connected to the base (1); the side plates (2) extend out of the top surface of the base (1) and enclose to form a U-shaped gap (4); the base (1) is made of a metal material; and the side plates (2) are configured as insulating non-stick plates. An electrode (5) is clamped in the U-shaped gap (4), and after a battery cell (3) is supported, long edges on two sides of the surface where the electrode (5) of the battery cell (3) is located protrude from the side plates (2). In the battery cell fixture, a sandwich structure consisting of a base and side plates is used, and the width of the inner U-shaped gap is adjustable to adapt to different types of battery cells, achieving quick and easy replacement.

Description

A new type of square battery cell fixture Technical Field

[0001] The present invention relates to the technical field of battery core coating production, and more specifically, to a novel square battery core jig. Background Art

[0002] With the growth in electric vehicle sales, the market demand for power batteries has increased significantly. With China's strong advocacy for low-carbon, green energy, the widespread application of photovoltaic and wind power generation is underway. Due to the instability of photovoltaic and wind power generation, a large number of energy storage batteries are needed to store green electricity. Furthermore, in areas where peak and valley electricity prices vary significantly, valley electricity can be stored and discharged during peak demand, improving grid power quality, regulating electricity consumption, and smoothing peak and valley demand. For these reasons, the market demand for both power batteries and energy storage batteries has skyrocketed.

[0003] A battery cell is a small, independent battery. Many cells are connected in series or parallel to form a battery module. Whether cylindrical or square, insulation is required between cells and between the cell and the tray. Furthermore, the insulation performance of the cell casing must meet certain requirements. Otherwise, leakage can lead to thermal runaway and a safety incident.

[0004] There is a new insulation technology that uses insulating paint to spray the battery cell shell. Because the spraying line has a very fast beat, the fixture that carries the battery cells on the line is very important.

[0005] In the prior art, Germany's STRAMA's battery cell UV spraying automatic line uses a metal U-shaped groove fixture as shown in Figure 1. The fixture includes a base with a U-shaped groove formed on the top of the base. The specific support method is to invert the battery cell as a whole, place the electrode surface of the battery cell on the top surface of the base, and clamp the battery cell electrode in the U-shaped groove.

[0006] This fixture has the following problems in actual use:

[0007] (1) If the user needs to change the production model, and the electrode widths of the produced cells are different, for example, the electrode widths are 19mm and 28mm respectively, then the jig needs to be replaced as a whole when changing the production model, which is costly and troublesome;

[0008] (2) For thin-film cells, such as cells with a thickness of only 27 mm, the long edge A of the electrode surface as shown in FIG2 is supported and pressed against the top surface of the side plate of the jig, so the top surface of the long edge is blocked and cannot be sprayed. There is no insulating coating at this location, which is prone to quality problems such as leakage;

[0009] (3) The existing fixtures are made of metal, and it is very difficult to clean the UV coating after it is cured on the fixture. Using a milling cutter for cleaning has high manufacturing and production costs, and produces a lot of dust.

[0010] Therefore, it is necessary to propose a new type of square battery cell fixture to at least partially solve the problems existing in the prior art.

[0011] Summary of the Invention

[0012] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0013] To at least partially solve the above problems, the present invention provides a novel square cell fixture, comprising:

[0014] The base and side panels are symmetrically arranged on both sides of the upper part of the base. The side panels are detachably connected to the base. The side panels extend out of the top surface of the base and are surrounded to form a U-shaped gap. The base is made of metal material, and the side panels are set as insulating non-stick panels; the base is installed on the automatic spraying line, and the electrode surface of the battery cell is placed on the top surface of the two side panels. The electrode clamp is set in the U-shaped gap. After the battery cell is supported, the long edges on both sides of the electrode surface of the battery cell protrude from the side panels.

[0015] Preferably, the base is provided as an integrally cast casting.

[0016] Preferably, the side panel is configured as a plate structure made of an insulating non-stick material; or an insulating non-stick material layer is provided on the surface of the side panel.

[0017] Preferably, the insulating non-stick material of the side panel is set to Teflon material.

[0018] Preferably, the cross section of the base is set to an inverted T shape, and a plurality of through holes are opened on the bottom plate of the base for connecting to the automatic spraying line.

[0019] Preferably, the cross section of the side plate is set to be trapezoidal, the top of the outer side surface of the side plate is inclined inward to form a trapezoidal slope, and the distance between the outer edges of the top of the two side plates is less than the width of the surface where the electrode of the battery cell is located.

[0020] Preferably, the side panels are evenly provided with a plurality of countersunk holes along the length direction, and a plurality of threaded holes are correspondingly provided on both sides of the upper portion of the base, and the side panels are connected to the sides of the base via countersunk screws.

[0021] Preferably, the width of the base portion located between the two side plates is set to 18-20 mm.

[0022] Preferably, a bending portion is provided at the inner bottom end of the side plate, a side surface of the bending portion is connected to a side surface of the base, and a gap is provided between the top surface of the bending portion and the electrode.

[0023] Preferably, the top surface of the bent portion is convex or concave relative to the top surface of the base, or is flush with the top surface of the base.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] The present invention provides a new type of square battery cell fixture,

[0026] (1) The fixture structure adopts a sandwich form of base and side plates. The thickness of the side plates and the base can be adjusted according to the width of the battery cell electrodes, so as to adjust the width of the inner U-shaped gap. It can adapt to different types of battery cells and is easy and fast to replace.

[0027] (2) The side panels of the fixture are made of polytetrafluoroethylene (Teflon) material, which is not easy to adhere to paint and is easy to clean even if it is attached;

[0028] (3) The side panels of the fixture are made of polytetrafluoroethylene (Teflon) material with a resistivity of up to 10^18Ω·cm, ensuring that the positive and negative electrodes of the battery cells on the fixture will not be short-circuited;

[0029] (4) The pointed structure of the side panel of the fixture exposes the long edge of the battery cell, and UV paint can be sprayed from bottom to top to better insulate the long edge.

[0030] The present invention relates to a novel square battery cell fixture. Other advantages, objectives, and features of the present invention will be partially reflected in the following description and partially understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] FIG1 is a schematic structural diagram of a battery fixture in the prior art;

[0033] FIG2 is a schematic diagram of the structure of the battery cell and the battery cell fixture installation in the prior art;

[0034] FIG3 is a schematic structural diagram of a novel square battery cell fixture of the present invention;

[0035] FIG4 is a schematic diagram of the cross-sectional structure of a novel square battery cell fixture of the present invention.

[0036] In the figure: 1. Base; 2. Side panel; 3. Battery cell; 4. U-shaped gap; 5. Electrode; 6. Through hole; 7. Countersunk hole; 8. Bend; A. Long edge. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0038] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0039] As shown in Figures 1-4, the present invention provides a new type of square battery cell fixture, including:

[0040] The base 1 and the side panels 2 are symmetrically arranged on both sides of the upper part of the base 1. The side panels 2 are detachably connected to the base 1. The side panels 2 extend out of the top surface of the base 1 and are surrounded to form a U-shaped gap 4. The base 1 is made of metal material, and the side panels 2 are set as insulating non-stick panels; the base 1 is installed on the automatic spraying line, and the electrode surface of the battery cell 3 is placed on the top surface of the two side panels 2, and the electrode 5 is clamped in the U-shaped gap 4. After the battery cell 3 is supported, the long edges on both sides of the electrode surface of the battery cell 3 protrude from the side panels 2.

[0041] The base 1 is configured as an integrally cast casting, which has better structural mechanical properties and low production costs.

[0042] The side panels 2 are configured as a plate structure made of an insulating non-stick material; or a layer of insulating non-stick material is provided on the surface of the side panels 2. Providing an insulating non-stick material layer on the surface of the side panels 2 can reduce the amount of insulating non-stick material used while ensuring both insulation and non-stick properties, thereby reducing production costs.

[0043] The insulating non-stick material of the side plate 2 is set to Teflon material.

[0044] The cross section of the base 1 is set to be an inverted T-shape, and a plurality of through holes 6 are opened on the bottom plate of the base 1 for connecting with the automatic spraying line.

[0045] The cross section of the side panel 2 is set to be trapezoidal, and the top of the outer side surface of the side panel 2 is inclined inward to form a trapezoidal slope. The distance between the outer edges of the top of the two side panels 2 is less than the width of the surface where the electrodes of the battery cell 3 are located.

[0046] The side panels 2 are evenly provided with a plurality of countersunk holes 7 along the length direction, and a plurality of threaded holes are correspondingly provided on both sides of the upper portion of the base 1 . The side panels 2 are connected to the sides of the base 1 by countersunk screws.

[0047] The width of the base 1 portion located between the two side panels 2 is set to 18 to 20 mm.

[0048] A bending portion 8 is provided at the inner bottom end of the side plate 2, the side surface of the bending portion 8 is connected to the side surface of the base 1, and a gap is provided between the top surface of the bending portion 8 and the electrode 5; the bending portions 8 of different side plates 2 have different thicknesses, and U-shaped gaps 4 of different widths are formed accordingly.

[0049] The top surface of the bent portion 8 is convex or concave relative to the top surface of the base 1 , or is flush with the top surface of the base 1 .

[0050] The working principle of the above technical solution is:

[0051] The present invention provides a novel square battery cell jig. The jig's base 1 is a one-piece cast part, with side panels 2 made of Teflon material having a trapezoidal cross-section. The side panels 2 are fixed to the base 1 on either side with countersunk screws, supporting the inverted battery cells 3. Teflon's high resistivity and excellent insulation properties prevent short circuits between the two terminals of the battery cells 3. Teflon's non-stick properties minimize paint buildup during spraying, making it easy to clean with a shovel after curing. The pointed tops of the side panels 2 expose the long edges of the battery cells 3, allowing UV paint to be sprayed upwards, effectively insulating the long edges of the battery cells 3.

[0052] The jig base between the two Teflon side panels is no thicker than 20mm, making it suitable for the thinnest battery cells 3 currently on the market. When producing battery cells 3 with wider electrodes, the side panels 2 can be replaced to adjust the size of the U-shaped gap 4 inside to accommodate different battery cell electrodes 5, achieving product adaptation. Furthermore, the jig base 1 does not need to be disassembled and replaced; only the Teflon side panels 2 need to be replaced, greatly improving changeover efficiency.

[0053] The beneficial effects of the above technical solution are:

[0054] (1) The fixture structure adopts a sandwich form of a base 1 and a side plate 2. The thickness of the side plate 2 and the base 1 can be adjusted according to the width of the battery cell electrode, so as to adjust the width of the inner U-shaped gap 4. It can adapt to different types of battery cells and is easy and fast to replace.

[0055] (2) The side plate 2 of the fixture is made of polytetrafluoroethylene (Teflon) material, which is not easy to adhere to paint, and even if it is attached, it is easy to clean;

[0056] (3) The side plate 2 of the fixture is made of polytetrafluoroethylene (Teflon) material with a resistivity of up to 10^18Ω·cm, ensuring that the positive and negative electrodes of the battery cells 3 on the fixture will not be short-circuited;

[0057] (4) The pointed structure of the side plate 2 of the fixture exposes the long edge of the battery cell 3, and UV paint can be sprayed from bottom to top to better insulate the long edge.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0060] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A new type of square battery cell fixture, characterized in that: include: The invention relates to a base (1) and a side plate (2), wherein the two side plates (2) are symmetrically arranged on both sides of the upper part of the base (1), the side plates (2) and the base (1) are detachably connected, the side plates (2) extend from the top surface of the base (1) and surround to form a U-shaped gap (4), the base (1) is made of metal material, and the side plates (2) are arranged as insulating non-stick plates; the base (1) is installed on the automatic spraying line, the surface where the electrode of the battery cell (3) is located is placed on the top surface of the two side plates (2), the electrode (5) is clamped in the U-shaped gap (4), and after the battery cell (3) is supported, the long edges on both sides of the surface where the electrode of the battery cell (3) is located protrude from the side plates (2).

2. A novel square battery cell fixture according to claim 1, characterized in that: The base (1) is configured as an integrally cast casting.

3. A novel square battery cell fixture according to claim 1, characterized in that: The side plate (2) is configured as a plate structure made of an insulating non-stick material; or a layer of insulating non-stick material is provided on the surface of the side plate (2).

4. A novel square battery cell fixture according to claim 3, characterized in that: The insulating non-stick material of the side plate (2) is set to Teflon material.

5. A novel square battery cell fixture according to claim 1, characterized in that: The cross section of the base (1) is arranged in an inverted T-shape, and a plurality of through holes (6) are provided on the bottom plate of the base (1) for connection with an automatic spraying line.

6. A novel square battery cell fixture according to claim 1, characterized in that: The cross section of the side plate (2) is arranged to be trapezoidal, the top of the outer side surface of the side plate (2) is inclined inwardly to form a trapezoidal inclined surface, and the distance between the outer edges of the tops of the two side plates (2) is less than the width of the surface where the electrodes of the battery cell (3) are located.

7. A novel square battery cell fixture according to claim 1, characterized in that: The side plate (2) is evenly provided with a plurality of countersunk holes (7) along the length direction, and a plurality of threaded holes are correspondingly provided on both sides of the upper portion of the base (1). The side plate (2) is connected to the side surface of the base (1) by countersunk screws.

8. A novel square battery cell fixture according to claim 1, characterized in that: The width of the base (1) portion located between the two side plates (2) is set to 18-20 mm.

9. A novel square battery cell fixture according to claim 1, characterized in that: A bending portion (8) is provided at the inner bottom end of the side plate (2), the side surface of the bending portion (8) is connected to the side surface of the base (1), and a gap is provided between the top surface of the bending portion (8) and the electrode (5).

10. A novel square battery cell fixture according to claim 9, characterized in that: The top surface of the bent portion (8) is convex or concave relative to the top surface of the base (1), or is flush with the top surface of the base (1).

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