Top cover assembly of power battery

Abstract

The utility model discloses a power battery top cover assembly, and relates to the technical field of power batteries, a sealing ring assembly comprises a sealing rubber sleeve and a protective screw sleeve screwed on the outer side of the sealing rubber sleeve, the sealing rubber sleeve comprises an external thread sleeve and a sealing washer which are integrally arranged, the protective screw sleeve comprises an internal thread sleeve, and the external thread sleeve and the sealing washer are integrally arranged. A stop gasket is arranged at the bottom end of a threaded sleeve of the inner threaded sleeve, and a rotary knob is arranged at the top end of the threaded sleeve of the inner threaded sleeve. According to the design, the sealing ring assembly based on the thread form is used as a sealing insulation part of the positive electrode and the negative electrode, after the positive electrode and the negative electrode are electrified and conducted subsequently, the protection thread sleeve in the sealing ring assembly is screwed out through the sealing rubber sleeve thread, a protection cover can be formed, cover protection is carried out on the electrode and an external equipment contact, and on one hand, the shielding protection effect is achieved; and on the other hand, a ring sleeve limiting effect can be achieved, and the connection stability of the electrode and an external equipment contact is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery field especially relates to a power battery top cap subassembly. BACKGROUND

[0002] The power battery top cap plays a vital role in protecting the battery safety, improving the battery performance and prolonging the battery life, and it is usually composed of riveting or injection molding, such as the power battery top cap plate assembly disclosed by Chinese patent network (publication announcement number CN215869577U), the positive sealing ring, the negative sealing ring, the positive pole, the negative pole, the positive pole hole and the negative pole hole of the positive pole and the negative pole are installed into the front counterbore of the top cap sheet, and the positive welding ring and the negative welding ring are welded into the front counterbore of the pole hole of the top cap sheet by laser welding process, so as to realize the close connection, and the reliability, the sealing property and the insulation property are good, and the manufacturing cost is low.

[0003] However, the power battery top cap subassembly adopted by the above-mentioned disclosed patent and the existing market still has some deficiencies: the positive and negative poles of the existing form of power battery top cap are exposed, and the positive and negative connection points are easily disturbed by the external environment during subsequent connection and installation, such as corrosion and impact of dust, and the safety use is relatively low. Therefore, the technical personnel in the art provide a power battery top cap subassembly to solve the problems in the above-mentioned background technology. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a power battery top cap subassembly, which solves the problem of poor self-protection of the positive and negative poles of the existing power battery top cap subassembly in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme: a power battery top cap subassembly, comprising an integrally packaged plastic substrate and a top cap plate;

[0006] Two groups of sealing ring assemblies are symmetrically installed between the plastic substrate and the top cap plate, and two groups of electrodes are symmetrically installed in the two groups of sealing ring assemblies;

[0007] The sealing ring assembly comprises a sealing rubber sleeve and a protective screw sleeve screwed on the outer side of the sealing rubber sleeve;

[0008] The sealing rubber sleeve comprises an integrally arranged outer threaded sleeve and a sealing washer;

[0009] The protective screw sleeve comprises an inner threaded sleeve, the bottom end of the inner threaded sleeve is provided with a stop washer, and the top end of the inner threaded sleeve is provided with a knob.

[0010] As a further technical scheme of the utility model: the outer thread sleeve and the inner thread sleeve are screwed to each other.

[0011] As a further technical scheme of the utility model: the upper plate surface of the plastic base plate is provided with a let-out slot A matched with the stop washer along the through direction of the sealing ring assembly, and the bottom plate surface of the top cover plate is provided with a let-out slot B matched with the stop washer along the through direction of the sealing ring assembly.

[0012] As a further technical scheme of the utility model: the both sides of the top plate of the plastic base plate are provided with positioning holes, and the both sides of the bottom plate of the top cover plate are provided with positioning buckles, and the positioning holes and the positioning buckles are in interference fit.

[0013] As a further technical scheme of the utility model: the electrode comprises an electrode column and a connecting piece which are integrally connected.

[0014] As a further technical scheme of the utility model: the plastic base plate and the top cover plate are provided with a rupture disc in the middle of the plate surface.

[0015] The utility model provides a kind of power battery top cover assembly, compared with prior art has the following beneficial effects:

[0016] The power battery top cover assembly of the design, based on the sealing ring assembly of thread form as the sealing insulating component of two groups of positive and negative electrodes, after subsequent positive and negative electrode electrical conduction, by the protective sleeve in sealing ring assembly with sealing rubber sleeve thread is screwed out, can form protective cover, cover protection is carried out to electrode and external equipment junction, on the one hand, shielding protection function is played, avoid the corrosion influence of external dust and other factors, on the other hand, it can play the function of ring limit, improve the connection stability of electrode and external equipment junction, with good safe use performance. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a kind of power battery top cover assembly structure schematic view;

[0018] Figure 2 It is a kind of power battery top cover assembly expanded schematic view;

[0019] Figure 3 It is a kind of power battery top cover assembly in sealing ring assembly and electrode expanded schematic view;

[0020] Figure 4 It is a kind of power battery top cover assembly in sealing ring assembly partial sectional view;

[0021] Figure 5 It is a kind of power battery top cover assembly in plastic base plate and top cover plate assembly schematic view.

[0022] In the figure: 1, plastic base plate; 2, top cover plate; 3, sealing ring assembly; 31, sealing rubber sleeve; 311, outer threaded sleeve; 312, sealing washer; 32, protective screw sleeve; 321, inner threaded sleeve; 322, stop washer; 323, knob; 4, electrode; 41, electrode column; 42, connecting piece; 5, explosion-proof sheet; 6, positioning row hole; 7, positioning row buckle; 8, let go of slot A; 9, let go of slot B. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] Please refer to Figures 1-5 The utility model provides a kind of power battery top cover assembly technical solutions: a kind of power battery top cover assembly, including integrally packaged plastic base plate 1 and top cover plate 2, two groups of sealing ring assembly 3 are symmetrically installed between plastic base plate 1 and top cover plate 2 and pass through, sealing ring assembly 3 includes sealing rubber sleeve 31 and the protective screw sleeve 32 that is screwed to the outside of sealing rubber sleeve 31, sealing rubber sleeve 31 includes integrally arranged outer threaded sleeve 311 and sealing washer 312, protective screw sleeve 32 includes inner threaded sleeve 321, the screw sleeve bottom end of inner threaded sleeve 321 is provided with stop washer 322, and the screw sleeve top end of inner threaded sleeve 321 is provided with knob 323, outer threaded sleeve 311 and inner threaded sleeve 321 are mutually screwed, by using the thread of outer threaded sleeve 311 in protective screw sleeve 32 and the thread of inner threaded sleeve 321 in sealing rubber sleeve 31, protective screw sleeve 32 can be screwed out upwards along sealing rubber sleeve 31, using protective screw sleeve 32 covers the protection of electrode and external equipment contact point, on the one hand, shielding protection is played, to avoid the corrosion influence of external dust and other factors, on the other hand, it can play the function of ring limit, improve the connection stability of electrode and external equipment contact point, with good safe use performance.

[0025] The upper surface of plastic base plate 1 is provided with let go of slot A 8 that is adapted to stop washer 322 along the through direction of sealing ring assembly 3, and the bottom surface of top cover plate 2 is provided with let go of slot B 9 that is adapted to stop washer 322 along the through direction of sealing ring assembly 3, by being provided with two groups of let go of slots that are adapted to stop washer 322 between plastic base plate 1 and top cover plate 2, on the one hand, it can provide displacement space for the thread of stop washer 322 in protective screw sleeve 32, on the other hand, it can use the stop of stop washer 322 to limit protective screw sleeve 32, so that it is screwed in a fixed amount, to avoid being screwed out directly.

[0026] The positioning row holes 6 are arranged on both sides of the top plate of the plastic base plate 1, the positioning row buckles 7 are arranged on both sides of the bottom plate of the top cover plate 2, and the positioning row holes 6 and the positioning row buckles 7 are in interference fit with each other, so that the top cover plate 2 and the plastic base plate 1 are fixed integrally in a buckle fixing installation mode, convenient installation and convenient subsequent disassembly and maintenance process.

[0027] The two groups of electrodes 4 are symmetrically and internally installed through the two groups of sealing ring assemblies 3, the electrode column 41 of the electrode 4 is connected with the sealing ring assembly 3, and the connecting piece 42 is connected with the power battery body, so that the positive and negative two groups of electrodes 4 are firmly installed.

[0028] The explosion-proof sheet 5 is arranged in the middle of the plate surface of the plastic base plate 1 and the top cover plate 2, when the internal load pressure of the power battery is too large, the explosion-proof sheet 5 is arranged to blow and release pressure, and the explosion-proof protection work of the power battery is realized.

[0029] The working principle of the utility model is as follows: when the positive and negative electrodes of the power battery are connected with the external equipment contact point, the external thread sleeve 311 in the protective screw sleeve 32 is screwed with the internal thread sleeve 321 in the sealing rubber sleeve 31, the protective screw sleeve 32 is screwed out along the sealing rubber sleeve 31, and at the same time, the displacement space for screwing the stop washer 322 in the protective screw sleeve 32 is provided, and the protective screw sleeve 32 is limited, the protective screw sleeve 32 is completely screwed out, the cover protection of the electrode and the external equipment contact point is realized, the shielding protection is realized, the corrosion influence of external dust and other factors is avoided, the ring limiting effect is realized, the connection stability of the electrode and the external equipment contact point is improved, the overall space occupation is small, the installation is flexible and adjustable, and the protection work of the power battery and the external equipment contact point is well adapted.

[0030] The above only describes the preferred embodiments of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and decorations can be made without departing from the principle of the utility model, and these improvements and decorations should be regarded as the protection range of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A power cell top cover assembly, characterized in that, The plastic base plate (1) and the top cover plate (2) are integrally encapsulated. Two groups of sealing ring assemblies (3) are symmetrically installed through the plastic base plate (1) and the top cover plate (2), and two groups of electrodes (4) are symmetrically installed through the two groups of sealing ring assemblies (3). The sealing ring assembly (3) comprises a sealing rubber sleeve (31) and a protective screw sleeve (32) screwed on the outside of the sealing rubber sleeve (31). The sealing rubber sleeve (31) comprises an outer threaded sleeve (311) and a sealing washer (312) integrally arranged. The protective screw sleeve (32) comprises an inner threaded sleeve (321), the bottom end of the inner threaded sleeve (321) is provided with a stop washer (322), and the top end of the inner threaded sleeve (321) is provided with a knob (323).

2. The power battery top cover assembly according to claim 1, characterized in that, The outer threaded sleeve (311) and the inner threaded sleeve (321) are screwed with each other.

3. The power battery top cover assembly according to claim 1, characterized in that, The upper surface of the plastic base plate (1) is provided with a let-go slot A (8) matched with the stop washer (322) along the through direction of the sealing ring assembly (3), and the bottom surface of the top cover plate (2) is provided with a let-go slot B (9) matched with the stop washer (322) along the through direction of the sealing ring assembly (3).

4. The power battery top cover assembly according to claim 1, characterized in that, The top plate of the plastic base plate (1) is provided with a positioning row hole (6) on both sides, and the bottom plate of the top cover plate (2) is provided with a positioning row buckle (7) on both sides, and the positioning row hole (6) and the positioning row buckle (7) are mutually interference fitted.

5. The power battery top cover assembly according to claim 1, characterized in that, The electrode (4) comprises an electrode column (41) and a connecting sheet (42) integrally connected.

6. The power battery top cover assembly according to claim 1, characterized in that, The plastic base plate (1) and the top cover plate (2) are provided with a rupture disc (5) in the middle of the surface.

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