Lithium battery tab electric connection structure

Abstract

The utility model discloses a lithium battery tab electric connection structure which comprises a first connection assembly and a second connection assembly, and the first connection assembly comprises an electrode body; the second connecting assembly comprises a tab body located at the top of the electrode body, second upper protective layers are arranged at the tops of the tab body and the electrode body, first upper protective layers are arranged at the tops of the second upper protective layers, first lower protective layers are arranged at the bottoms of the tab body and the electrode body, and second lower protective layers are arranged at the bottoms of the first lower protective layers; a plurality of groups of first crimping layers and a plurality of groups of second crimping layers are crimped between the tab body and the electrode body, the first crimping layers are transversely distributed at equal intervals relative to the bottom of the tab body, through holes are formed in one ends of the first crimping layers and one ends of the second crimping layers, and the through holes are filled with first adhesive glue and second adhesive glue respectively. According to the device, the connection firmness of the tab body and the electrode body can be improved while the cost is controlled, and the service life of the lithium battery is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery pole lug connection technical field, concretely is a lithium battery pole lug electric connection structure. BACKGROUND

[0002] The pole lug of lithium battery is the part of the inside positive and negative material of battery and the outside circuit connection, usually is made by metal sheet, they are important to ensure that the current can effectively go in and out of battery, in the lithium battery manufacturing process, the connection of pole lug is a key step, needs to guarantee good electrical contact and mechanical strength, the current pole lug connection mode of lithium battery has welding method, cementation method and mechanical pressure connection method.

[0003] The pole lug and the positive and negative metal sheet of lithium battery will adopt pressure connection method to connect the pole lug and the positive and negative metal sheet for saving cost at present, and the pole lug and the positive and negative metal sheet connected by pressure connection method are easy to separate due to the mechanical vibration contacted in the use of lithium battery, thereby the normal use of lithium battery needs to be improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a lithium battery pole lug electric connection structure to solve the problem of the pole lug and the positive and negative metal sheet of lithium battery connected by pressure connection method firmness cross.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a lithium battery pole lug electric connection structure, including first connecting assembly and second connecting assembly, the first connecting assembly includes electrode body;

[0006] The second connecting assembly includes the pole lug body at the top of electrode body, and the first pressure connection layer and the second pressure connection layer are arranged between the pole lug body and the electrode body, one end of the first pressure connection layer and the second pressure connection layer is provided with a through hole, and the through hole is filled with the first adhesive and the second adhesive respectively.

[0007] Preferably, the top of the pole lug body and the electrode body is provided with a second upper protective layer, and the first upper protective layer is arranged on the top of the second upper protective layer.

[0008] Preferably, the bottom of the pole lug body and the electrode body is provided with a first lower protective layer, and the second lower protective layer is arranged on the bottom of the first lower protective layer.

[0009] Preferably, the first pressure connection layer is horizontally and equidistantly distributed about the bottom of the pole lug body, and the first pressure connection layer is provided with multiple groups, and each group is not less than two.

[0010] Preferably, the second pressure connection layer is horizontally and equidistantly distributed about the top of the electrode body, and the second pressure connection layer is provided with multiple groups, and each group is not less than two.

[0011] Preferably, the material of the second upper protective layer and the first lower protective layer is a corrosion-resistant coating.

[0012] Preferably, the material of the first upper protective layer and the second lower protective layer is a waterproof coating.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1), this device can improve the firmness of the tab body and the electrode body connection while controlling the cost, guarantee the service life of lithium battery.

[0015] (2), this device connects the tab body and the electrode body through the crimping forming mode, the contact surface of the tab body and the electrode body forms the first crimping layer and the second crimping layer, the first crimping layer and the second crimping layer rivet with the tab body and the electrode body respectively, the through hole is set up in the first crimping layer and the second crimping layer close to the one end of the tab body and the electrode body, and the first adhesive and the second adhesive are injected in the through hole, thereby improving the firmness of the tab body and the electrode body connection also increases the firmness of the first crimping layer and the second crimping layer and the contact surface of the tab body and the electrode body.

[0016] (3), this device sets up the first upper protective layer and the second upper protective layer and the first lower protective layer and the second lower protective layer at the top and the bottom of the tab body and the electrode body respectively, thereby can improve the waterproof, anticorrosive performance of the tab body and the electrode body. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a lithium battery tab electric connection structure structure schematic diagram of the utility model;

[0018] Figure 2 It is a lithium battery tab electric connection structure of the utility model Figure 1 It is the enlarged view of A place in the middle;

[0019] Figure 3 It is the tab body bottom view of a lithium battery tab electric connection structure of the utility model.

[0020] In the drawing: 1, first connecting assembly;11, second crimping layer;12, second adhesive;13, electrode body;2, second connecting assembly;21, tab body;22, first adhesive;23, first crimping layer;3, first upper protective layer;4, second upper protective layer;5, first lower protective layer;6, second lower protective layer. DETAILED DESCRIPTION

[0021] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figures 1-3 The utility model provides a technical scheme: a lithium battery pole lug electric connection structure, including first connecting component 1 and second connecting component 2, first connecting component 1 includes electrode body 13;

[0023] Second connecting component 2 includes the pole lug body 21 at the top of electrode body 13, the top of pole lug body 21 and electrode body 13 is provided with second upper protective layer 4, and the top of second upper protective layer 4 is provided with first upper protective layer 3;The bottom of pole lug body 21 and electrode body 13 is provided with first lower protective layer 5, and the bottom of first lower protective layer 5 is provided with second lower protective layer 6;The material of second upper protective layer 4 and first lower protective layer 5 is anticorrosive coating;This structure can improve the corrosion resistance of pole lug body 21 and electrode body 13 by setting second upper protective layer 4 and first lower protective layer 5, guarantee the service life of pole lug body 21 and electrode body 13;The material of first upper protective layer 3 and second lower protective layer 6 is waterproof coating;This structure can improve the waterproofness of pole lug body 21 and electrode body 13 by setting first upper protective layer 3 and second lower protective layer 6, thereby avoiding the rusting of pole lug body 21 and electrode body 13;First crimping layer 23 and second crimping layer 11 are arranged between pole lug body 21 and electrode body 13, second crimping layer 11 is horizontally and equidistantly distributed about the top of electrode body 13, and each group of second crimping layer 11 is not less than two;The second crimping layer 11 of this structure is formed by pressing a protrusion and pole lug body 21 to form a riveting structure by a crimping machine, so as to guarantee the tightness of the connection between pole lug body 21 and electrode body 13;First crimping layer 23 is horizontally and equidistantly distributed about the bottom of pole lug body 21, and each group of first crimping layer 23 is not less than two;The first crimping layer 23 of this structure is formed by pressing a protrusion and electrode body 13 to form a riveting structure by a crimping machine, so as to guarantee the tightness of the connection between pole lug body 21 and electrode body 13;One end of first crimping layer 23 and second crimping layer 11 is provided with a through hole, and the through hole is filled with first adhesive 22 and second adhesive 12 respectively;The device can reinforce pole lug body 21 and electrode body 13 by first adhesive 22 and second adhesive 12, and improve the firmness of the connection between pole lug body 21 and electrode body 13;The material of first adhesive 22 and second adhesive 12 is conductive glue;The device needs to use a crimping machine and a dispensing machine in the processing process, and the dispensing machine is used for filling the first adhesive 22 and the second adhesive 12.

[0024] Working principle: when using the lithium battery tab electrical connection structure, first, the pressure riveting of the tab body 21 and the electrode body 13 is carried out from the top of the tab body 21 using a pressure riveter, then the tab body 21 and the electrode body 13 are turned over, and the pressure riveting of the tab body 21 and the electrode body 13 is carried out from the top of the electrode body 13 to form the first pressure riveting layer 23 and the second pressure riveting layer 11, after the pressure riveting of the tab body 21 and the electrode body 13 is completed, the conductive glue is filled into the first pressure riveting layer 23 and the second pressure riveting layer 11 using a dispensing machine to form the first adhesive 22 and the second adhesive 12, and finally the first upper protective layer 3 and the second upper protective layer 4 and the first lower protective layer 5 and the second lower protective layer 6 are sprayed on the top and the bottom of the tab body 21 and the electrode body 13 respectively, so as to improve the service life of the tab body 21 and the electrode body 13.

[0025] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A lithium battery tab electrical connection structure, comprising a first connection component (1) and a second connection component (2), characterized in that: The first connection component (1) includes an electrode body (13); The second connecting component (2) includes a tab (21) located on top of the electrode body (13). A first pressing layer (23) and a second pressing layer (11) are pressed together between the tab (21) and the electrode body (13). A through hole is provided at one end of the first pressing layer (23) and the second pressing layer (11), and the through hole is filled with a first adhesive (22) and a second adhesive (12), respectively.

2. The lithium battery tab electrical connection structure according to claim 1, characterized in that: The top of both the tab body (21) and the electrode body (13) is provided with a second upper protective layer (4), and the top of the second upper protective layer (4) is provided with a first upper protective layer (3).

3. The lithium battery tab electrical connection structure according to claim 1, characterized in that: The bottom of both the tab body (21) and the electrode body (13) is provided with a first lower protective layer (5), and the bottom of the first lower protective layer (5) is provided with a second lower protective layer (6).

4. The lithium battery tab electrical connection structure according to claim 1, characterized in that: The first pressing layer (23) is distributed horizontally at equal intervals with respect to the bottom of the tab body (21). The first pressing layer (23) is provided in multiple groups, with no less than two in each group.

5. The lithium battery tab electrical connection structure according to claim 1, characterized in that: The second pressing layer (11) is distributed horizontally at equal intervals with respect to the top of the electrode body (13), and multiple sets of the second pressing layer (11) are provided, with no less than two in each set.

6. The lithium battery tab electrical connection structure according to claim 2, characterized in that: The second upper protective layer (4) and the first lower protective layer (5) are both made of anti-corrosion coating.

7. The lithium battery tab electrical connection structure according to claim 2, characterized in that: The first upper protective layer (3) and the second lower protective layer (6) are both made of waterproof coating.

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