阅读说明：本技术 一种极柱、连接片及锂离子电池模组 (Utmost point post, connection piece and lithium ion battery module ) 是由 曹楷 侯敏 曹辉 于 2019-09-27 设计创作，主要内容包括：本发明提出一种极柱,包括极柱和极柱顶端的大平面,其特征在于,所述大平面中间设置有凸台。本发明还提出一种连接片,以及使用上述电极及电极连接片的锂离子电池。本发明提出的一种极柱、连接片及锂离子电池模组,通过改进极柱及电极连接片的结构,使电池连接片和电芯直接进行定位,省去工装或线束隔离板等中间辅助定位环节,使电池模组中电芯之间的连接更简单、方便、快捷。(The invention provides a pole, which comprises a pole and a large plane at the top end of the pole, and is characterized in that a boss is arranged in the middle of the large plane. The invention also provides a connecting sheet and a lithium ion battery using the electrode and the electrode connecting sheet. According to the pole, the connecting sheet and the lithium ion battery module, the structure of the pole and the electrode connecting sheet is improved, so that the battery connecting sheet and the battery cell are directly positioned, intermediate auxiliary positioning links such as a tool or a wiring harness isolation plate are omitted, and the connection between the battery cells in the battery module is simpler, more convenient and faster.)

1. The pole comprises a pole and a large plane at the top end of the pole, and is characterized in that a boss is arranged in the middle of the large plane.

2. A pole according to claim 1, characterised in that the boss comprises a locating portion and a guiding portion; the positioning part is connected with a pole, and the guide part is positioned on the positioning part.

3. A pole according to claim 2, wherein the locating portion is a cylinder or a cone.

4. The post according to claim 2, wherein said guiding portion is chamfered and is a cone, sphere or smooth gradual curve.

5. The pole of claim 1, wherein the boss is integrally or separately connected to the pole.

6. The pole of claim 1, wherein the boss is centrally provided with an identification mark.

7. The pole of claim 6 wherein said identification mark is a conical or cylindrical counterbore.

8. A connecting sheet for connecting a pole according to any one of claims 1 to 7, wherein the connecting sheet is provided with two through holes for connecting with bosses on two adjacent cell poles respectively; one through hole is matched with the boss, and the other through hole is in clearance fit with the boss.

9. A lithium ion battery using the electrode of any one of claims 1 to 7 and the electrode tab of claim 8.

Technical Field

The invention relates to the technical field of lithium ion battery modules, in particular to a pole, a connecting sheet and a lithium ion battery module.

Background

The lithium ion battery module is formed by assembling a plurality of monomer battery cores in series and parallel, and the connection and fastening between the monomer battery cores require small contact resistance, vibration resistance and high firmness between the connecting sheet and the pole.

As shown in fig. 1, a conventional pole 1 generally uses a large flat surface 2 as a mechanical and electrical connection surface with an electrode connection pad, and a recessed platform 3 is provided in the center of the pole 1. The sinking platform 3 is used for marking the anode and the cathode or is used for CCD optical addressing positioning when being welded with a battery connecting sheet. In use, as shown in fig. 2, the battery connecting sheet 4 is firstly placed on the wiring harness isolation plate for pre-fixing, then placed on the battery core 5, and connected by laser welding.

In the structure of the existing pole and connecting sheet, the positioning of the connecting sheet and the battery cell is always a problem, and although the positioning can be realized through a tool or a wiring harness isolation plate, the positioning is still not direct enough.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a pole, which comprises a pole and a large plane at the top end of the pole, and is characterized in that a boss is arranged in the middle of the large plane.

Wherein the boss includes a positioning portion and a guide portion; the positioning part is connected with a pole, and the guide part is positioned on the positioning part.

Wherein the positioning part is a cylinder or a cone.

Wherein, the guide part is provided with a chamfer and is a cone, a spherical body or a smooth gradually-changed curved surface.

The pole column is characterized in that the lug boss and the pole column are integrally formed or connected in a split mode.

Wherein, boss center is equipped with the identification mark.

Wherein the identification mark is a conical or cylindrical counter bore.

The connecting sheet is characterized in that two through holes are formed in the connecting sheet and are respectively connected with bosses on two adjacent cell poles; one through hole is matched with the boss, and the other through hole is in clearance fit with the boss.

A lithium ion battery using the electrode and the electrode connecting sheet.

According to the pole, the connecting sheet and the lithium ion battery module, the structure of the pole and the electrode connecting sheet is improved, so that the battery connecting sheet and the battery cell are directly positioned, intermediate auxiliary positioning links such as a tool or a wiring harness isolation plate are omitted, and the connection between the battery cells in the battery module is simpler, more convenient and faster.

Drawings

FIG. 1 is a schematic view of a conventional pole structure;

FIG. 2 is a schematic diagram of a conventional battery module;

FIG. 3 is a schematic view of the pole structure of the present invention;

FIG. 4 is a schematic view of a connecting sheet structure according to the present invention;

fig. 5 is a schematic structural view of a pole, a connecting sheet and a battery module according to the present invention.

Detailed Description

The invention will be further described by the following specific examples in conjunction with the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

As shown in fig. 3 to 5, the lithium ion battery module of the present invention is assembled by connecting a plurality of battery cells 5 in series and in parallel. The battery cell 5 is provided with the pole 1 and a large plane 2 at the top end of the pole, and a boss 6 is arranged in the middle of the large plane 2. The boss 6 and the pole 1 can be integrally formed, and can also be made into an independent boss which is riveted or welded with the pole 1. The height of the boss is 0.5-5mm, which is corresponding to the thickness of the connecting sheet, and the diameter of the boss is 3-20 mm. The boss 6 includes a positioning portion 61 and a guide portion 62. The positioning part 61 is connected with the pole 1 and is cylindrical or conical. The guide portion 62 is located on the positioning portion 61, and the guide portion has a chamfer, and is a taper, a spherical body, or a smoothly tapered curved surface. The center of the boss 6 can be also provided with an identification mark for CCD optical identification or visual identification. The identification mark is a conical or cylindrical counter bore.

Two through holes 7 and 8 are arranged on the electrode connecting sheet 4 and are respectively connected with bosses on two adjacent electric core poles. One through hole 7 is matched with the boss 6, and the other through hole 8 is in clearance fit with the boss 6 and can be made into a long round hole.

During the use, put electric core 5 well according to the order that the module required earlier to press from both sides tightly according to the designing requirement, satisfy the designing requirement with the interval with the pressure of guaranteeing between the electric core. And then the electrode connecting sheets 4 are placed on the large plane 2 of the battery core 5 according to the designed sequence and position, and due to the positioning effect of the through holes 7 and 8, the electrode connecting sheets 4 can be placed at the accurate position without external auxiliary tools or parts. Finally, the electrode connection pieces 4 and the electrodes 1 may be welded together using laser welding, thereby completing the electrical connection of the module.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.