Battery case insulating film and mounting tool thereof

Abstract

The application relates to the battery technical field and discloses a battery shell insulation film and a mounting tool thereof, a containing cavity for containing a battery is arranged on a battery shell, the battery shell insulation film comprises a bottom film, a plurality of side films are arranged on the periphery of the bottom film, the bottom film is used for being attached to the bottom wall of the containing cavity, the side films are used for being attached to the side walls of the containing cavity, and the thickness of the bottom film and the side films is 0.05-0.3 mm. Based on the above-mentioned characteristic battery shell insulation film, after the battery is installed in the containing cavity of the battery shell, the battery and the battery shell are separated by the bottom film and the side films, when the battery appears powder dropping, the positive electrode material falling off cannot realize the lapping of the positive electrode or the negative electrode of the battery and the battery shell, so that the corrosion of the battery shell is avoided, and the service life of the battery is ensured.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery casing insulating film and its mounting fixture. Background Technology

[0002] Currently, batteries typically consist of a casing and electrode assemblies located within the casing. These electrode assemblies include a positive electrode, a negative electrode, and a separator. Batteries are prone to powder shedding during use. Battery powder shedding refers to the phenomenon where the adhesive on the surface of the positive electrode material fails, causing the positive electrode material to gradually detach. Because the positive electrode material is conductive, its detachment can easily lead to contact between the positive or negative electrode and the battery casing, causing corrosion of the battery casing and affecting battery life. Utility Model Content

[0003] To solve the above-mentioned technical problems, this application provides a battery casing insulating film and its installation fixture to prevent battery powder from causing the positive or negative electrode of the battery to come into contact with the battery casing, thereby preventing battery casing corrosion and ensuring battery life.

[0004] The technical solution adopted by this application to solve its technical problem is:

[0005] A battery casing insulating film, wherein the battery casing has a receiving cavity for accommodating the battery, including a bottom film, and a plurality of side films are provided around the periphery of the bottom film. The bottom film is used to adhere to the bottom wall of the receiving cavity, and the side films are used to adhere to the side walls of the receiving cavity. The thickness of the bottom film and the side films is independently 0.05 to 0.3 mm.

[0006] Preferably, the thickness of the bottom film and the side film are each independently 0.1 to 0.2 mm.

[0007] Preferably, the bottom film and the side film are each made of PET, PP or UV resin.

[0008] Preferably, both the bottom membrane and the side membranes are rectangular, and there are four side membranes, which are respectively disposed on the four sides of the bottom membrane body.

[0009] Preferably, the surface of the bottom membrane that adheres to the bottom wall of the receiving cavity and the surface of the side membrane that adheres to the side wall of the receiving cavity are both coated with adhesive.

[0010] A battery casing insulating film mounting fixture includes a first telescopic component, the lower end of which is provided with a first adsorption plate for adsorbing the bottom film, and also includes a plurality of second telescopic components, which are arranged one-to-one with a plurality of side films, and the second telescopic components are provided with second adsorption plates for adsorbing the side films.

[0011] Preferably, the bottom film is rectangular, and there are multiple first telescopic components, which are evenly distributed along the length of the bottom film.

[0012] Preferably, the bottom film includes two long sides arranged opposite each other and two short sides connecting the two long sides, the side film connecting the long sides is a first side film, and the side film connecting the short sides is a second side film;

[0013] The second telescopic component includes a first telescopic unit and a second telescopic unit. The first telescopic unit is used to adsorb the first side membrane, and the second telescopic unit is used to adsorb the second side membrane. For each first side membrane, a first telescopic unit is provided between each two adjacent first telescopic components.

[0014] Preferably, the system includes a controller, and both the first telescopic component and the second telescopic component are electrically connected to the controller.

[0015] Preferably, the first telescopic component and the second telescopic component are pneumatic cylinders, electric cylinders, or hydraulic cylinders.

[0016] The battery casing insulating film and its mounting fixture according to an embodiment of this application have the following advantages compared with the prior art: by setting a bottom film to adhere to the bottom wall of the receiving cavity of the battery casing, and at the same time providing a plurality of side films adhering to the side walls of the receiving cavity of the battery casing around the bottom film, and the thickness of the bottom film and the side films being 0.05-0.3mm, the battery and the battery casing are isolated by the bottom film and the side films after the battery is installed in the receiving cavity of the battery casing. When the battery sheds powder, the detached positive electrode material cannot achieve the overlap between the positive or negative electrode of the battery and the battery casing, thereby avoiding corrosion of the battery casing and ensuring battery life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the battery casing insulating film in its unfolded state according to this application.

[0018] Figure 2 This is a side view of the battery casing insulating film in the unfolded state according to this application.

[0019] Figure 3 This is a schematic diagram illustrating the application of the battery casing insulating film mounting fixture of this application.

[0020] Figure 4 This is a schematic diagram of the battery casing insulating film installation process in this application.

[0021] Wherein: 1-bottom film, 2-first side film, 3-second side film, 4-first telescopic component, 5-first adsorption plate, 6-first telescopic unit, 7-second telescopic unit, 8-second adsorption plate, 9-controller, 10-adhesive, 100-battery housing, 200-receiving cavity, 300-battery housing insulating film. Detailed Implementation

[0022] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0023] In this application, unless otherwise expressly 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] like Figure 1 As shown in the preferred embodiment of this application, a battery housing insulating film 300 is provided. The battery housing 100 has a receiving cavity 200 for accommodating electrode components. The film includes a bottom film 1, and the bottom film 1 has a plurality of side films around its periphery. Specifically, the bottom film 1 includes upper and lower surfaces that are disposed opposite each other, and a side surface that connects the upper and lower surfaces. The lower surface of the bottom film 1 is used to fit against the bottom wall of the receiving cavity 200. The side films can be disposed at the edge of the upper surface of the bottom film 1; or the side films can be connected to the side surface of the bottom film 1, that is, the bottom film 1 and the side films are cut from a single film. The side membrane is used to adhere to the sidewall of the receiving cavity 200. The thickness of the bottom membrane 1 and the side membrane are each independently 0.05-0.3 mm, such as 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, etc., or any value or range between any two of the above values. Preferably, the thickness of the bottom membrane 1 and the side membrane are each independently selected between 0.1 and 0.2 mm.

[0025] The thickness of the bottom film 1 and the side film can be the same or different, but it is preferred that they are the same. The material of the bottom film 1 and the side film can be the same or different, but it is preferred that they are the same. The material can be a polymer material with insulating properties such as PET (polyethylene terephthalate), PP (polypropylene), or UV resin.

[0026] Based on the above-mentioned technical features, the battery casing insulating film 300 has a bottom film 1 attached to the bottom wall of the receiving cavity 200 of the battery casing 100, and multiple side films attached to the side walls of the receiving cavity 200 of the battery casing are provided around the bottom film 1. The thickness of the bottom film 1 and the side films is 0.05 to 0.3 mm. Thus, after the electrode assembly is installed in the receiving cavity 200 of the battery casing 100, the electrode assembly and the battery casing 100 are isolated by the bottom film 1 and the side films. When the battery sheds powder, the detached positive electrode material cannot achieve the overlap between the positive or negative electrode of the battery and the battery casing 100, thereby avoiding the corrosion of the battery casing 100 and ensuring the battery life.

[0027] In this embodiment, the receiving cavity 200 is cylindrical with a rectangular or circular cross-section. Taking the rectangular cross-section of the receiving cavity 200 as an example, the bottom film 1 and the side films are also rectangular. There are four side films, which are respectively disposed on the four sides of the bottom film 1. When the battery housing insulating film 300 is fully installed, the four side films surround each other and together with the bottom film 1 form a cavity in which the battery is housed.

[0028] Please also refer to the appendix. Figure 2 To ensure the bonding strength between the battery casing insulating film 300 and the receiving cavity 200, adhesive 10 is provided on the surface of the bottom film 1 that is in contact with the bottom wall of the receiving cavity 200 and the surface of the side film that is in contact with the side wall of the receiving cavity 200.

[0029] It is understandable that the adhesive 10 can be integrally formed with the battery casing insulating film 300. For example, a battery casing insulating film 300 with adhesive 10 is analogous to tape, with the battery casing insulating film 300 resembling the substrate layer of the tape and the adhesive 10 resembling the backing layer. Alternatively, the adhesive 10 and the battery casing insulating film 300 can be separate components. For instance, a layer of adhesive can be first applied to the battery casing insulating film 300, and then it can be bonded to the battery casing 100. After activation, the adhesive 10 is formed.

[0030] Please see the appendix Figure 3Given the structure of the battery housing insulating film 300 described above, and the fact that its bottom is coated with adhesive 10, and that the four side films surround each other after installation, i.e., the bottom film 1 is roughly the same size as the bottom wall of the receiving cavity 200, a specific installation fixture is required to ensure the installation accuracy of the battery housing insulating film 300 and the receiving cavity 200. Therefore, this application also provides an installation fixture for the battery housing insulating film 300 to ensure the installation of the battery housing insulating film 300.

[0031] See also the appendix Figure 4 In this embodiment, the battery casing insulating film mounting fixture includes a first telescopic component 4 and a plurality of second telescopic components. The lower end of the first telescopic component 4 is provided with a first adsorption plate 5 for adsorbing the bottom film 1. The plurality of second telescopic components are arranged one-to-one with the plurality of side films. The second telescopic components are provided with a second adsorption plate 8 for adsorbing the side films. The first telescopic component 4 and the second telescopic component can be connected, and the upper end of the first telescopic component 4 or the second telescopic component can be connected to a moving mechanism; or the first telescopic component 4 and the second telescopic component are not connected, and the upper ends of the first telescopic component 4 and the second telescopic component are respectively connected to a moving mechanism. When the battery housing insulating film 300 needs to be installed, the moving mechanism drives the installation fixture to move above the bottom film 1, the first telescopic component 4 drives the first adsorption plate 5 to move down and adsorb the bottom film 1, and then the second telescopic component drives the second adsorption plate 8 to a suitable position. The side film is folded upward by a person or a robot to adsorb the side film with the corresponding second adsorption plate 8. Then the moving mechanism moves the battery housing insulating film 300 to the top of the corresponding battery housing, the first telescopic component 4 extends, and drives the battery housing insulating film 300 to move down to the receiving cavity 200. After the bottom film 1 is attached to the bottom wall of the receiving cavity 200, it stops. Then the second telescopic component drives the side film to be attached to the side wall of the receiving cavity 200, thus completing the installation of the battery housing insulating film 300. After installation, the first adsorption plate 5 and the second adsorption plate 8 lose their adsorption properties and detach from the battery casing insulating film 300. The moving mechanism then drives the installation fixture to the next installation process.

[0032] The first telescopic component 4 and the second telescopic component can be cylinders, electric cylinders or hydraulic cylinders, etc., and the battery casing insulating film installation fixture also includes a controller 9. The first telescopic component 4 and the second telescopic component are electrically connected to the controller 9, thereby realizing automatic control and improving installation efficiency and effect.

[0033] In this embodiment, if the cross-section of the receiving cavity 200 is circular, then one first telescopic component 4 can be provided, and the second telescopic components are evenly distributed in a ring around the center line of the first telescopic component 4.

[0034] If the cross-section of the receiving cavity 200 is rectangular, then multiple first telescopic components 4 need to be provided. Specifically, as shown in the attached... Figure 1 The L direction is the length direction of the bottom membrane 1. The plurality of first telescopic components 4 are evenly distributed along the length direction of the bottom membrane 1, which can not only ensure the connection stability with the bottom membrane 1, but also ensure the strength of the connection with the bottom wall of the receiving cavity 200 during the process of the bottom membrane 1 fitting with the bottom wall of the receiving cavity 200.

[0035] In addition, to ensure the connection strength between the side membrane and the sidewall of the receiving cavity 200, multiple second telescopic components corresponding to the length direction of the bottom membrane 1 are also required. Specifically, the bottom membrane 1 includes two long sides arranged opposite each other and two short sides connecting the two long sides. The side membrane connecting the long sides is the first side membrane 2, and the side membrane connecting the short sides is the second side membrane 3. The second telescopic component includes a first telescopic unit 6 and a second telescopic unit 7. The first telescopic unit 6 is used to adsorb the first side membrane 2, and the second telescopic unit 7 is used to adsorb the second side membrane 3. For each second side membrane 3, multiple or one second telescopic unit 7 can be provided, depending on the length of the second side membrane 3. However, generally, one second telescopic unit 7 is sufficient for each second side membrane 3. For each first side membrane 2, a first telescopic unit 6 is provided between every two adjacent first telescopic components 4, thereby ensuring the connection strength between the first side membrane 2 and the sidewall of the receiving cavity 200. The two corresponding first telescopic units 6 between every two adjacent first telescopic components 4 can be connected together to ensure the overall structural strength and stability.

[0036] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A battery casing insulating film, wherein the battery casing has a receiving cavity for accommodating electrode assemblies, characterized in that: Includes a bottom film, and the bottom film has multiple side films around its periphery. The bottom film is used to adhere to the bottom wall of the receiving cavity, and the side films are used to adhere to the side walls of the receiving cavity. The thickness of the bottom film and the side films is independently 0.05~0.3mm. Both the bottom membrane and the side membranes are rectangular, and there are four side membranes, which are respectively disposed on the four sides of the bottom membrane body; The surfaces of the bottom membrane that adhere to the bottom wall of the receiving cavity and the surfaces of the side membranes that adhere to the side walls of the receiving cavity are both provided with adhesive.

2. The battery casing insulating film as described in claim 1, characterized in that: The thickness of the bottom film and the side film are each independently 0.1~0.2 mm.

3. The battery casing insulating film as described in claim 1, characterized in that: The bottom film and the side film are each made of PET, PP or UV resin.

4. A battery casing insulating film mounting fixture for mounting the battery casing insulating film as described in any one of claims 1 to 3, characterized in that: It includes a first telescopic component, the lower end of which is provided with a first adsorption plate for adsorbing the bottom film, and also includes a plurality of second telescopic components, which are arranged one-to-one with the plurality of side films, and the second telescopic components are provided with a second adsorption plate for adsorbing the side films.

5. The battery casing insulating film mounting fixture as described in claim 4, characterized in that: The bottom membrane is rectangular, and there are multiple first telescopic components, which are evenly distributed along the length of the bottom membrane.

6. The battery casing insulating film mounting fixture as described in claim 5, characterized in that: The bottom film includes two long sides arranged opposite each other and two short sides connecting the two long sides. The side film connecting the long sides is the first side film, and the side film connecting the short sides is the second side film. The second telescopic component includes a first telescopic unit and a second telescopic unit. The first telescopic unit is used to adsorb the first side membrane, and the second telescopic unit is used to adsorb the second side membrane. For each first side membrane, a first telescopic unit is provided between each two adjacent first telescopic components.

7. The battery casing insulating film mounting fixture as described in claim 4, characterized in that: Includes a controller, and both the first telescopic component and the second telescopic component are electrically connected to the controller.

8. The battery casing insulating film mounting fixture as described in claim 4, characterized in that: The first telescopic component and the second telescopic component are pneumatic cylinders, electric cylinders, or hydraulic cylinders.

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