A new type of square block cell jig

Abstract

The application discloses a novel square block battery cell jig which comprises a base and side plates, two side plates are symmetrically arranged on two sides of the upper portion of the base, the side plates are detachably connected with the base, the side plates extend out of the top surface of the base and are arranged to form a U-shaped gap, the base is made of metal material, and the side plates are arranged as insulating non-stick plates; the base is installed on an automatic spraying line, the electrode-located surface of the battery cell is arranged on the top surface of the two side plates, the electrode is clamped in the U-shaped gap, and after the battery cell is supported, the long edges on the two sides of the electrode-located surface of the battery cell protrude out of the side plates. The jig structure adopts a sandwich form of the base plus the side plates, the width of the U-shaped gap on the inner side is adjustable, different types of battery cells can be adapted, and replacement is convenient and fast; the side plates of the jig are made of Teflon material, are not easy to attach paint, and are easy to clean after attachment; high resistivity ensures that the positive and negative electrodes of the battery cell cannot be short-circuited; and the structure of the pointed top of the side plate exposes the long edges of the battery cell, and better insulation is achieved after UV paint spraying.

Description

Technical Field

[0001] This invention relates to the field of battery cell coating production technology, and more specifically, to a novel jig for square battery cells. Background Technology

[0002] With the growth in electric vehicle sales, the market demand for power batteries has increased significantly. The country is strongly advocating for low-carbon and green energy, and the application of photovoltaic and wind power generation is expanding widely. Due to the instability of photovoltaic and wind power generation, a large number of energy storage batteries are needed to store green electricity. In addition, in regions with large price differences between peak and off-peak electricity, off-peak electricity can be stored and discharged during peak hours, thus improving grid power quality, regulating electricity consumption, and smoothing out peak and off-peak periods. For these reasons, the market demand for both power batteries and energy storage batteries has surged.

[0003] A battery cell is an independent small battery, and many cells are combined together in series and parallel to form a battery module. Whether it is a cylindrical cell or a prismatic cell, insulation is required between cells and between cells and the tray. The insulation performance of the cell casing must meet certain requirements; otherwise, leakage will lead to thermal runaway of the cell and cause a safety accident.

[0004] A new insulation technology is currently available, which uses insulating coating to spray insulation onto the battery cell casing. Because the automated spraying line operates at a very high cycle time, the fixtures that carry the battery cells on the line are crucial.

[0005] In existing technology, the automated UV coating line for battery cells from STRAMA in Germany uses the method shown in the attached figure. Figure 1 The metal U-shaped groove fixture shown includes a base with a U-shaped groove formed on the top of the base. The specific support method is to invert the entire battery cell, 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 width of the produced cells is different, for example, the electrode widths are 19mm and 28mm respectively, the fixture needs to be completely replaced when changing the production model, which is costly and troublesome.

[0008] (2) For thin-film cells, such as cells with a thickness of only 27mm, as shown in the attached... Figure 2 The long edge A of the surface where the middle electrode is located is supported and pressed on the top surface of the side plate of the fixture. Therefore, the top surface of the long edge is blocked and cannot be sprayed. There is no insulating coating at this point, which can easily cause quality problems such as leakage.

[0009] (3) Existing fixtures are made of metal. After the UV coating is cured on the fixture, it is very difficult to clean. Using a milling cutter for cleaning results in high manufacturing and production costs, as well as a lot of dust.

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

[0011] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0012] To at least partially solve the above problems, the present invention provides a novel prismatic battery cell fixture, comprising:

[0013] The base and side plates are symmetrically arranged on both sides of the upper part of the base. The side plates are detachably connected to the base. The side plates extend out of the top surface of the base and form a U-shaped gap. The base is made of metal material, and the side plates are set as insulating non-stick plates. The base is installed on the automatic spraying line. The electrode surface of the battery cell is placed on the top surface of the two side plates. The electrode is clamped 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 out of the side plates.

[0014] Preferably, the base is a one-piece casting.

[0015] Preferably, the side panel is a plate structure made of insulating non-stick material; or the surface of the side panel is provided with an insulating non-stick material layer.

[0016] Preferably, the insulating non-stick material of the side panel is Teflon.

[0017] Preferably, the cross-section of the base is set as an inverted T-shape, and the bottom plate of the base has multiple through holes for connection with the automatic spraying line.

[0018] Preferably, the cross-section of the side plate is trapezoidal, the top of the outer side 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 electrodes of the battery cell are located.

[0019] Preferably, the side plate has multiple countersunk holes evenly distributed along its length, and the upper two sides of the base have multiple threaded holes corresponding to each other. The side plate is connected to the side of the base by countersunk screws.

[0020] Preferably, the width of the base portion located between the two side plates is set to 18–20 mm.

[0021] Preferably, a bent portion is provided at the bottom inner side of the side plate, the side of the bent portion is connected to the side of the base, and a gap is provided between the top surface of the bent portion and the electrode.

[0022] Preferably, the top surface of the bent portion protrudes or is recessed from the top surface of the base, or is flush with the top surface of the base.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] This invention provides a novel square battery cell fixture.

[0025] (1) The fixture structure adopts a sandwich form with a base and a side plate. The thickness of the side plate and the base can be adjusted according to the width of the battery cell electrode to realize the adjustment of the width of the inner U-shaped gap. It can be adapted to different types of battery cells and is convenient and quick to replace.

[0026] (2) The side plates of the fixture are made of polytetrafluoroethylene (Teflon), which is not easy to adhere to paint, and even if it does, it is easy to clean.

[0027] (3) The side plate of the fixture is made of polytetrafluoroethylene (Teflon) material with a resistivity of up to 10^18Ω·cm, ensuring that the positive and negative terminals of the battery cells on the fixture will not be short-circuited.

[0028] (4) The pointed structure of the jig side plate exposes the long edge of the battery cell, allowing UV paint to be sprayed from bottom to top, so that the long edge can be better insulated.

[0029] The present invention provides a novel prismatic battery cell fixture. Other advantages, objectives and features of the present invention will be apparent in part from the following description, and in part will be understood by those skilled in the art through study and practice of the invention. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of a battery cell fixture in the prior art;

[0032] Figure 2 This is a schematic diagram of the structure for mounting battery cells and battery cell fixtures in the prior art;

[0033] Figure 3 This is a schematic diagram of the structure of a novel square battery cell fixture according to the present invention;

[0034] Figure 4 This is a cross-sectional structural diagram of a novel square battery cell fixture according to the present invention.

[0035] In the diagram: 1. Base; 2. Side plate; 3. Battery cell; 4. U-shaped gap; 5. Electrode; 6. Through hole; 7. Countersunk hole; 8. Bending section; A. Long edge. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0037] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0038] like Figure 1-4 As shown, the present invention provides a novel prismatic battery cell fixture, comprising:

[0039] The base 1 and the side plates 2 are symmetrically arranged on the upper two sides 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 form a U-shaped gap 4. The base 1 is made of metal material, and the side plates 2 are set as insulating non-stick plates. The base 1 is installed on the automatic spraying line. The electrode surface of the battery cell 3 is placed on the top surface of the two side plates 2. 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 out of the side plates 2.

[0040] The base 1 is designed as a one-piece casting, which has better structural mechanical properties and lower production costs.

[0041] Side panel 2 is configured as a plate structure made of insulating non-stick material; or the surface of side panel 2 is provided with an insulating non-stick material layer. Providing an insulating non-stick material layer on the surface of side panel 2 can reduce the amount of insulating non-stick material used and reduce production costs while ensuring insulation and non-stick functions.

[0042] The insulating non-stick material of side panel 2 is Teflon.

[0043] The cross-section of the base 1 is set in an inverted T shape, and multiple through holes 6 are provided on the bottom plate of the base 1 for connection with the automatic spraying line.

[0044] The cross-section of the side plate 2 is set as a trapezoid, and the top of the outer side of the side plate 2 is inclined inward to form a trapezoidal slope. The distance between the outer edges of the top of the two side plates 2 is less than the width of the electrode surface of the cell 3.

[0045] The side plate 2 has multiple countersunk holes 7 evenly distributed along its length, and the base 1 has multiple threaded holes on both sides of its upper part. The side plate 2 is connected to the side of the base 1 by countersunk screws.

[0046] The width of the base 1 portion located between the two side plates 2 is set to 18-20 mm.

[0047] A bend 8 is provided at the bottom inner side of the side plate 2. The side of the bend 8 is connected to the side of the base 1. A gap is provided between the top surface of the bend 8 and the electrode 5. The bends 8 of different side plates 2 have different thicknesses, which are correspondingly arranged to form U-shaped gaps 4 of different widths.

[0048] The top surface of the bent portion 8 protrudes or is recessed from the top surface of the base 1, or is flush with the top surface of the base 1.

[0049] The working principle of the above technical solution is as follows:

[0050] This invention provides a novel square battery cell fixture. The base 1 of the fixture is a one-piece cast part, and the side plates 2 are made of Teflon material with a trapezoidal cross-section. The side plates 2 are fixed to both sides of the base 1 by countersunk screws, supporting the inverted battery cell 3. Due to the very high resistivity and good insulation performance of Teflon, short circuits between the two poles of the battery cell 3 are avoided. Teflon has non-stick properties, so less paint adheres to the side plates 2 during spraying, and it is easy to clean with a scraper after curing. The pointed structure of the side plates 2 exposes the long edges on both sides of the battery cell 3, allowing UV paint to be sprayed from bottom to top, thus effectively insulating the long edges of the battery cell 3.

[0051] The thickness of the fixture base between the two Teflon side plates does not exceed 20mm, making it compatible with the thinnest battery cell 3 currently on the market. When producing battery cells 3 with wider electrodes, the size of the U-shaped gap 4 on the inner side is changed by replacing the side plate 2 to accommodate the electrodes 5 of different battery cells 3, achieving product compatibility. Furthermore, the fixture base 1 does not need to be disassembled and replaced; only the Teflon side plate 2 needs to be replaced, greatly improving changeover efficiency.

[0052] The beneficial effects of the above technical solution are as follows:

[0053] (1) The fixture structure adopts a sandwich form of base 1 plus side plate 2. The thickness of the contact surface between the side plate 2 and the base 1 can be adjusted according to the width of the battery cell electrode, so as to realize the adjustment of the width of the inner U-shaped gap 4. It can adapt to different types of battery cells and is convenient and quick to replace.

[0054] (2) The side plate 2 of the fixture is made of polytetrafluoroethylene (Teflon), which is not easy to adhere to paint, and even if it does, it is easy to clean.

[0055] (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 poles of the battery cell 3 on the fixture will not be short-circuited.

[0056] (4) The pointed structure of the side plate 2 of the fixture exposes the long edge of the battery cell 3, which can be sprayed with UV paint from bottom to top, so that the long edge can be better insulated.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 limitations on this invention.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A novel square battery cell fixture, characterized in that, include: The base (1) and the side plate (2) are symmetrically arranged on the upper two sides of the base (1). The side plate (2) is detachably connected to the base (1). The side plate (2) extends out of the top surface of the base (1) and forms a U-shaped gap (4). The base (1) is made of metal material, and the side plate (2) is set as an insulating non-stick plate. The base (1) is installed on the automatic spraying line. The electrode surface of the battery cell (3) is placed on the top surface of the two side plates (2). The electrode (5) is sandwiched 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 out of the side plate (2).

2. The novel prismatic battery cell fixture according to claim 1, characterized in that, The base (1) is set as a one-piece casting.

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

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

5. A novel square battery cell fixture according to claim 1, characterized in that, The cross-section of the base (1) is set as an inverted T-shape, and multiple through holes (6) are provided on the bottom plate of the base (1) for connecting with the 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 set as a trapezoid, and the top of the outer side of the side plate (2) is inclined inward to form a trapezoidal slope. The distance between the outer edges of the top of the two side plates (2) is less than the width of the electrode surface of the cell (3).

7. A novel square battery cell fixture according to claim 1, characterized in that, The side plate (2) has multiple countersunk holes (7) evenly distributed along its length. The upper sides of the base (1) have multiple threaded holes. The side plate (2) is connected to the side of the base (1) by countersunk screws.

8. A novel prismatic 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 prismatic battery cell fixture according to claim 1, characterized in that, A bend (8) is provided at the bottom inner side of the side plate (2). The side of the bend (8) is connected to the side of the base (1). A gap is provided between the top surface of the bend (8) and the electrode (5).

10. A novel prismatic battery cell fixture according to claim 9, characterized in that, The top surface of the bent part (8) protrudes or is recessed from the top surface of the base (1), or is flush with the top surface of the base (1).

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