Composite PPS diaphragm

Abstract

The utility model relates to the technical field of battery diaphragms, and provides a composite PPS diaphragm which comprises a polyphenylene sulfide diaphragm base layer, the upper end and the lower end of the polyphenylene sulfide diaphragm base layer are fixedly connected with first bonding layers, the upper ends of the first bonding layers are fixedly connected with a non-woven fabric diaphragm, a reinforcing piece is arranged in the non-woven fabric diaphragm, and the reinforcing piece is fixedly connected with the first bonding layers. A polyvinylidene fluoride layer is arranged above the non-woven fabric diaphragm; the reinforcing piece comprises a plurality of transverse glass fiber strips arranged in the non-woven fabric diaphragm, a plurality of longitudinal glass fiber strips are further arranged in the non-woven fabric diaphragm, the longitudinal glass fiber strips and the transverse glass fiber strips are arranged in a crossed mode, the transverse glass fiber strips and the longitudinal glass fiber strips are arranged in a crossed mode to form a net shape, and the transverse glass fiber strips and the longitudinal glass fiber strips are integrally formed with the non-woven fabric diaphragm. And through the transverse glass fiber strips and the longitudinal glass fiber strips, the non-woven fabric diaphragm has good anti-cracking and anti-deformation effects in use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery separator, especially to a kind of composite PPS separator. BACKGROUND

[0002] Battery separator refers to a layer of separator material between battery positive and negative, is very key part in battery, has direct influence on battery safety and cost, its main role is: isolation positive and negative and make the electron in battery cannot freely cross, let the ion in electrolyte pass between positive and negative, wherein polyphenylene sulfide separator has the advantages of high temperature resistance, mechanical strength is high;

[0003] Battery generates heat in the process of operation, battery separator will shrink, deform and other conditions in long-term use in battery, thereby affecting the stability of battery separator, prone to battery short circuit and other conditions occur. UTILITY MODEL CONTENT

[0004] According to the deficiencies existing in the prior art, the utility model aims at providing a kind of composite PPS separator, with the effect of improving the overall heat resistance and deformation resistance of polyphenylene sulfide separator, and improving stability.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A kind of composite PPS separator, including polyphenylene sulfide separator base layer, the upper and lower ends of the polyphenylene sulfide separator base layer are all fixedly connected with first adhesive layer, and the upper end of first adhesive layer is fixedly connected with non-woven fabric separator, the non-woven fabric separator is provided with reinforcing member, and the upper of the non-woven fabric separator is provided with polyvinylidene fluoride layer;

[0007] The reinforcing member includes a plurality of horizontal glass fiber strips arranged in the non-woven fabric separator, and a plurality of longitudinal glass fiber strips are also arranged in the non-woven fabric separator, and the longitudinal glass fiber strips and the horizontal glass fiber strips are arranged in cross.

[0008] In a preferred example, the upper end of the non-woven fabric separator can be further fixedly connected with a second adhesive layer, and the upper end of the second adhesive layer is fixedly connected with an anti-winding piece.

[0009] In a preferred example, the anti-winding piece can further include an anti-winding frame fixedly connected to the upper end of the second adhesive layer, a plurality of horizontal anti-winding strips are fixedly connected between the side walls of the anti-winding frame, and a plurality of longitudinal anti-winding strips are fixedly connected to the horizontal anti-winding strips, and the longitudinal anti-winding strips are fixed to the side walls of the anti-winding frame.

[0010] The utility model discloses in a preferable example can be further configured as: the upper end fixed connection of anti rolling piece has third adhesive layer, the polyvinylidene fluoride layer fixed connection in the upper end of third adhesive layer.

[0011] The utility model discloses in a preferable example can be further configured as: the upper end fixed connection of polyvinylidene fluoride layer has fourth adhesive layer, and the upper end fixed connection of fourth adhesive layer has antistatic layer.

[0012] The utility model discloses in a preferable example can be further configured as: the upper end of antistatic layer is equipped with the indication groove, and the inner bottom wall of indication groove is bonded with label.

[0013] Summarized above, the utility model discloses at least one beneficial technical effect that includes following:

[0014] 1. be provided with polyphenyl sulfide diaphragm base layer, first adhesive layer, non -woven diaphragm, polyvinylidene fluoride layer, horizontal glass fiber strip, longitudinal glass fiber strip, and horizontal glass fiber strip and longitudinal glass fiber strip form the net shape with the intercrossed shape, and the non -woven diaphragm is integrally formed with, through horizontal glass fiber strip and longitudinal glass fiber strip, the non -woven diaphragm has very good anti -cracking and anti -deformation effect when using.

[0015] 2. be provided with anti rolling piece, third adhesive layer, anti rolling frame, horizontal anti rolling strip and longitudinal anti rolling strip, and anti rolling frame and horizontal anti rolling strip and longitudinal anti rolling strip form anti rolling piece, when rolling to diaphragm, anti rolling frame, horizontal anti rolling strip and longitudinal anti rolling strip can improve diaphragm recovery effect, improve the anti rolling and anti rolling edge effect of diaphragm. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the perspective view of the embodiment;

[0017] Figure 2 It is the enlarged view of place A in the embodiment Figure 1

[0018] Figure 3 It is the partial view of anti rolling piece in the embodiment;

[0019] Figure 4 It is the partial view of longitudinal glass fiber strip in the embodiment;

[0020] Figure 5 It is the enlarged view of place B in the embodiment Figure 4

[0021] ​​In the diagram, 1. Polyphenylene sulfide membrane base layer; 2. Polyvinylidene fluoride layer; 3. First adhesive layer; 4. Non-woven membrane; 5. Transverse glass fiber strip; 6. Longitudinal glass fiber strip; 7. Second adhesive layer; 8. Anti-curling component; 9. Third adhesive layer; 10. Anti-curling frame; 11. Transverse anti-curling strip; 12. Longitudinal anti-curling strip; 13. Fourth adhesive layer; 14. Antistatic layer; 15. Indicator groove; 16. Label. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example:

[0024] Reference Figures 1-5 The present invention discloses a composite PPS membrane, including a polyphenylene sulfide membrane base 1, with a first adhesive layer 3 fixedly connected to both the upper and lower ends of the polyphenylene sulfide membrane base 1, and a non-woven fabric membrane 4 fixedly connected to the upper end of the first adhesive layer 3. A reinforcing member is provided inside the non-woven fabric membrane 4, and a polyvinylidene fluoride layer 2 is provided on the top of the non-woven fabric membrane 4.

[0025] The reinforcing member includes several transverse glass fiber strips 5 disposed within the nonwoven fabric diaphragm 4. Several longitudinal glass fiber strips 6 are also disposed within the nonwoven fabric diaphragm 4, and the longitudinal glass fiber strips 6 and the transverse glass fiber strips 5 are arranged in a crisscross pattern.

[0026] In this embodiment, reference Figure 4 The transverse glass fiber strips 5 and longitudinal glass fiber strips 6 are intersected to form a mesh, which is integrally formed with the non-woven fabric diaphragm 4. Through the transverse glass fiber strips 5 and longitudinal glass fiber strips 6, the non-woven fabric diaphragm 4 has a good anti-crack and anti-deformation effect when in use.

[0027] The general forming method of the nonwoven membrane 4, the transverse glass fiber strips 5, and the longitudinal glass fiber strips 6 is as follows: glass fibers can be melted and spun into a mesh. During the production of the nonwoven membrane 4, the nonwoven membrane 4 is woven together with the transverse glass fiber strips 5 and the longitudinal glass fiber strips 6. Preferably, the diameter of the transverse glass fiber strips 5 and the longitudinal glass fiber strips 6 is larger than the weaving filaments of the nonwoven membrane 4, forming a skeleton for the nonwoven membrane 4. Based on the inherent advantages of the mesh structure, the tensile strength and deformation resistance of the nonwoven membrane 4 can be improved during use. The specific operation can be performed by those skilled in the art, and will not be described in detail.

[0028] The preferred first adhesive layer 3, as well as the second adhesive layer 7, the third adhesive layer 9, and the fourth adhesive layer 13 described below, can all be made of polytetrafluoroethylene;

[0029] The polyphenylene sulfide diaphragm base layer 1 itself has high tensile strength and wear resistance, is not easy to break or deform, has good acid resistance, alkali resistance, oil resistance, can be used in corrosive environment for a long time, and the like, the non-woven fabric diaphragm 4 has high porosity, which is beneficial to the infiltration of electrolyte and the conduction of ions, thereby improving the charge and discharge performance of the battery, and the polyphenylene sulfide diaphragm base layer 1 and the non-woven fabric diaphragm 4 can improve the overall performance.

[0030] Further, please refer to Figure 3 The upper end of the non-woven fabric diaphragm 4 is fixedly connected with a second adhesive layer 7, and the upper end of the second adhesive layer 7 is fixedly connected with an anti-winding piece 8.

[0031] In this embodiment, referring to Figure 3 After the second adhesive layer 7 is coated on the non-woven fabric diaphragm 4, the anti-winding piece 8 can be connected with the non-woven fabric diaphragm 4 through the second adhesive layer 7.

[0032] Further, please refer to Figure 3 The anti-winding piece 8 includes an anti-winding frame 10 fixedly connected to the upper end of the second adhesive layer 7, a plurality of transverse anti-winding strips 11 fixedly connected between the side walls of the anti-winding frame 10, and a plurality of longitudinal anti-winding strips 12 fixedly connected to the transverse anti-winding strips 11, and the longitudinal anti-winding strips 12 are fixed to the side walls of the anti-winding frame 10.

[0033] In this embodiment, the anti-winding frame 10, the transverse anti-winding strips 11 and the longitudinal anti-winding strips 12 form the anti-winding piece 8, and when the diaphragm is wound, the anti-winding frame 10, the transverse anti-winding strips 11 and the longitudinal anti-winding strips 12 can improve the recovery effect of the diaphragm and improve the anti-winding and anti-winding edge effect of the diaphragm.

[0034] Preferably, how the anti-winding frame 10, the transverse anti-winding strips 11 and the longitudinal anti-winding strips 12 are formed, the anti-winding frame 10, the transverse anti-winding strips 11 and the longitudinal anti-winding strips 12 are polyvinylidene fluoride, and when being formed, the polyvinylidene fluoride can be added into a mold with the same shape as the anti-winding piece 8, and the specific shape can be referred to Figure 3 After the material is cooled and formed, it is used after demolding.

[0035] Further, please refer to Figure 2 The upper end of the anti-winding piece 8 is fixedly connected with a third adhesive layer 9, and the polyvinylidene fluoride layer 2 is fixedly connected to the upper end of the third adhesive layer 9.

[0036] In this embodiment, the polyvinylidene fluoride layer 2 can improve the overall porosity, puncture resistance, high temperature resistance and electrolyte retention capacity, thereby improving the safety and performance of the battery.

[0037] Further, please refer to Figure 1 and Figure 2The upper end of the polyvinylidene fluoride layer 2 is fixedly connected with a fourth adhesive layer 13, and the upper end of the fourth adhesive layer 13 is fixedly connected with an antistatic layer 14.

[0038] In the embodiment, the material of the antistatic layer 14 is polyethylene, and the overall antistatic effect can be improved.

[0039] Further, please refer to Figure 1 The upper end of the antistatic layer 14 is provided with an indicating groove 15, and the inner bottom wall of the indicating groove 15 is bonded with a label 16.

[0040] In the embodiment, when the diaphragm is used, the wound diaphragm needs to be cut, and although not all of them are shown in the figure, the indicating groove 15 can be provided for indicating the length of the diaphragm, and the length is written on the label 16, so as to facilitate cutting.

[0041] The implementation principle of the above embodiment is that the transverse glass fiber strip 5 and the longitudinal glass fiber strip 6 are formed in a cross shape to form a net shape, and are integrally formed with the non-woven diaphragm 4. Through the transverse glass fiber strip 5 and the longitudinal glass fiber strip 6, the non-woven diaphragm 4 has good anti-cracking and anti-deformation effect when used. The polyphenylene sulfide diaphragm base layer 1 is combined with the non-woven diaphragm 4, has the advantages of improving battery performance, high temperature resistance, improving cycle life, and has high tensile strength and wear resistance, and is not easy to break or deform.

[0042] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0043] The embodiments of the specific embodiment are preferred embodiments of the utility model, and are not limited to the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A composite PPS membrane, comprising a polyphenylene sulfide membrane base layer (1), characterized in that: The upper and lower ends of the polyphenylene sulfide membrane base layer (1) are fixedly connected to the first adhesive layer (3), and the upper end of the first adhesive layer (3) is fixedly connected to the non-woven membrane (4). The non-woven membrane (4) is provided with a reinforcing member, and the non-woven membrane (4) is provided with a polyvinylidene fluoride layer (2) on top of the non-woven membrane (4). The reinforcing member includes a plurality of transverse glass fiber strips (5) disposed within the nonwoven diaphragm (4), and a plurality of longitudinal glass fiber strips (6) are also disposed within the nonwoven diaphragm (4), with the longitudinal glass fiber strips (6) and the transverse glass fiber strips (5) arranged in a crisscross pattern.

2. The composite PPS diaphragm according to claim 1, characterized in that: The upper end of the nonwoven membrane (4) is fixedly connected to a second adhesive layer (7), and the upper end of the second adhesive layer (7) is fixedly connected to an anti-winding component (8).

3. The composite PPS diaphragm according to claim 2, characterized in that: The anti-rolling component (8) includes an anti-rolling frame (10) fixedly connected to the upper end of the second adhesive layer (7). A plurality of transverse anti-rolling strips (11) are fixedly connected between the side walls of the anti-rolling frame (10), and a plurality of longitudinal anti-rolling strips (12) are fixedly connected to the transverse anti-rolling strips (11). The longitudinal anti-rolling strips (12) are fixed to the side walls of the anti-rolling frame (10).

4. The composite PPS diaphragm according to claim 2, characterized in that: The upper end of the anti-rolling component (8) is fixedly connected to a third adhesive layer (9), and the polyvinylidene fluoride layer (2) is fixedly connected to the upper end of the third adhesive layer (9).

5. The composite PPS diaphragm according to claim 1, characterized in that: The upper end of the polyvinylidene fluoride layer (2) is fixedly connected to a fourth adhesive layer (13), and the upper end of the fourth adhesive layer (13) is fixedly connected to an antistatic layer (14).

6. The composite PPS diaphragm according to claim 5, characterized in that: The upper end of the antistatic layer (14) is provided with an indicator groove (15), and a label (16) is attached to the inner bottom wall of the indicator groove (15).

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