Bolt connection structure for pole and core package tab

Abstract

The utility model relates to the technical field of lithium ion power batteries, and discloses a bolt connection structure for a pole and core package tabs, which comprises a battery pack, two core package tabs are arranged on each of a positive pole and a negative pole at the top end of the battery pack, wrapping strips are wrapped outside the core package tabs of the battery pack, and punched holes are punched on one sides of the wrapping strips; the pole column is arranged above the battery pack, and the pole column is arranged between two adjacent core pack tabs; the pressing plates are arranged on the two sides of the pole, and the pole, the pressing plates and the wrapping strip are in threaded connection. The wrapping strip wraps the core wrapping tabs of the battery pack, the pole column is placed between the two core wrapping tabs, the wrapping strip is punched, and the bolt movably penetrates through the pressing plate, the wrapping strip and the pole column, so that the pole column and the tabs are in threaded connection, and compared with welding connection, the battery core tabs and the pole column are connected through the bolt structure; the battery performance is improved, and the internal resistance stability of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion power battery technical field especially relates to a pole and core package tab bolt connection structure. BACKGROUND

[0002] Lithium ion power battery can be considered as the green secondary battery of 21st century. It has the characteristics of high voltage, large specific energy, long charge-discharge life, stable discharge performance, no pollution etc. But the biggest challenge is the safety and cycle life of the battery in use, the safety problem is very important to lithium ion power battery, but the service life of the battery is more important to consumers. The internal connection of the battery is not reliable, which can increase the internal resistance of the battery and be unstable, so the technical improvement of the pole and the tab connection is particularly important.

[0003] The current battery core package tab and the connecting strip, the connecting strip and the pole are welded, the tab and the connecting strip are ultrasonic welded, and the connecting strip and the pole are laser welded. But in the production process, the welding process between the battery tab and the connecting strip, the connecting strip and the pole exists welding virtual welding and welding not firm phenomenon. After the battery reaches the end of formation and capacity, the internal resistance will be out of limit, the battery cannot be repaired, thereby affecting the performance of the battery.

[0004] Therefore, the technical personnel in the art provides a kind of pole and core package tab bolt connection structure to solve the problems raised in the above background art. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of pole and core package tab bolt connection structure, solves the problems raised in the above background art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of pole and core package tab bolt connection structure, it includes battery package, the positive pole and the negative pole of the top end of the battery package are provided with two core package tabs, the core package tab of the battery package is covered with package strip outside, and the side of the package strip is stamped with a punch hole;Pole, the pole is arranged above the battery package, and the pole is arranged between the adjacent two core package tabs;Pressing plate, the pressing plate is arranged on the two sides of the pole, and the pole, the pressing plate and the package strip are in threaded connection relationship.

[0008] According to the pole and core package tab bolt connection structure, the first via hole is opened in one side of the pressing plate, and the two pressing plates are in mutual parallel state.

[0009] According to the pole and core package tab bolt connection structure, the package strip is a rectangular strip, and a triangular notch is arranged at the middle position of the package strip.

[0010] According to the pole and the core package lug bolt connection structure, the lower half of the pole is in the shape of a Chinese character 'j', and the second through hole is formed through the lower half of the pole at the position corresponding to the punching.

[0011] According to the pole and the core package lug bolt connection structure, the pole and the pressing plate are provided with a bolt, the bolt is movably penetrated through the second through hole and the first through hole, and a nut is threadedly connected.

[0012] According to the pole and the core package lug bolt connection structure, the upper half of the pole is a threaded column and is threadedly connected with a nut, and a threaded connection hole is formed at the top end of the pole.

[0013] The utility model provides a kind of pole and core package lug bolt connection structure.It has the following beneficial effects:

[0014] (1) by using the package strip to be covered on the core package lug of battery package, the pole is placed between two core package lugs, the package strip is punched, the bolt movably penetrates the pressing plate, the package strip and the pole, so that the pole is threadedly connected with the lug, compared with welding connection, the battery cell lug and the pole of the application are connected using bolt structure, ensure firm connection, improve battery performance, ensure battery resistance stability.

[0015] (2) by setting the second through hole formed through the lower half of the pole at the position corresponding to the punching, the bolt movably penetrates the second through hole and the first through hole and is threadedly connected with the nut, the core package lug is threadedly connected with the pole.

[0016] (3) by setting the upper half of the pole as a threaded column, a threaded connection hole is formed at the top end of the pole, the battery series and parallel connection are bolted, easy to assemble, such as single battery appears abnormal when using battery pack, it can be quickly disassembled and handled. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the core package combined perspective view of the utility model pole and core package lug bolt connection structure;

[0018] Figure 2 It is the pressing plate front view of the utility model pole and core package lug bolt connection structure;

[0019] Figure 3 It is the package strip front view of the utility model pole and core package lug bolt connection structure;

[0020] Figure 4 It is the pole perspective view of the utility model pole and core package lug bolt connection structure;

[0021] Figure 5 It is the pole front view and plan view of the utility model pole and core package lug bolt connection structure.

[0022] Legend:

[0023] 10. Battery pack; 11. Terminal post; 12. Pressure plate; 13. Bolt; 14. Sheath strip; 15. First through hole; 16. Second through hole; 17. Threaded connection hole; 18. Nut. Detailed Implementation

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "inner," "outer," and "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0027] like Figures 1-5 As shown: A terminal post and core pack tab bolt connection structure includes a battery pack 10. The positive and negative terminals at the top of the battery pack 10 are each provided with two core pack tabs. Each core pack tab of the battery pack 10 is covered with a strip 14, and a punch is punched on one side of the strip 14. A terminal post 11 is located above the battery pack 10 and is located between two adjacent core pack tabs. A pressure plate 12 is located on both sides of the terminal post 11. The terminal post 11, the pressure plate 12 and the strip 14 are connected by threads.

[0028] Specifically, by wrapping the batten 14 on the core pack tab of the battery pack 10, the pole 11 is placed between the two core pack tabs, the batten 14 is punched, the bolt 13 is movably penetrated through the pressing plate 12, the batten 14 and the pole 11, thereby connecting the pole 11 and the tab with threads, compared with welding connection, the application connects the battery cell tab and the pole 11 with the bolt 13 structure, ensures firm connection, improves battery performance and guarantees battery resistance stability.

[0029] The first through hole 15 is formed on one side of the pressing plate 12, and the two pressing plates 12 are in a parallel state.

[0030] Specifically, the first through hole 15 is formed on the pressing plate 12, which facilitates the bolt 13 movably penetrating the pressing plate 12 and facilitates installation.

[0031] The batten 14 is a rectangular strip, and a triangular notch is formed at the middle position of the batten 14.

[0032] Specifically, the triangular notch is formed at the middle position of the batten 14, which facilitates wrapping the batten 14 on the core pack tab.

[0033] The lower half of the pole 11 is in the shape of a Chinese character 'jia', and the second through hole 16 is formed at the position corresponding to the punching hole in the lower half of the pole 11. The bolt 13 is arranged between the pole 11 and the pressing plate 12, movably penetrates the second through hole 16 and the first through hole 15, and is threadedly connected with a nut.

[0034] Specifically, the second through hole 16 is formed at the position corresponding to the punching hole in the lower half of the pole 11, the bolt 13 movably penetrates the second through hole 16 and the first through hole 15 and is threadedly connected with a nut, thereby threadedly connecting the core pack tab and the pole 11.

[0035] The upper half of the pole 11 is a threaded column and is threadedly connected with a nut 18, and a threaded connection hole 17 is formed at the top end of the pole 11.

[0036] Specifically, the upper half of the pole 11 is a threaded column, and the threaded connection hole 17 is formed at the top end of the pole 11, the battery series and parallel connection is connected with the bolt 13, which is easy to assemble, and if an abnormal single battery occurs during use of the battery pack, it can be quickly disassembled and handled.

[0037] The working principle of the bolt connection structure of the pole and the core package tab of the application is as follows: the pole 11 is placed between two core package tabs by wrapping the package strip 14 on the core package tab of the battery package 10, the package strip 14 is punched, the second via hole 16 is formed through the lower half of the pole 11 at the position corresponding to the punched hole, the bolt 13 is movably penetrated through the second via hole 16 and the first via hole 15 and is screwed with a nut, the bolt 13 is movably penetrated through the pressing plate 12, the package strip 14 and the pole 11, so as to screw the pole 11 and the tab together, compared with the welding connection, the battery cell tab and the pole 11 are connected by the bolt 13 structure in the application, the connection is firm, the battery performance is improved, the stability of the battery internal resistance is ensured, the upper half of the pole 11 is a threaded column, the threaded connection hole 17 is formed at the top end of the pole 11, the battery series and parallel connection are connected by the bolt 13, and the assembly is easy, when the battery pack is used, the single battery can be quickly disassembled and handled when the single battery is abnormal.

[0038] The basic principle and main features of the application and the advantages of the application are shown and described above. It should be understood by those skilled in the art that the application is not limited by the above examples, the above examples and the description in the specification are only to illustrate the principle of the application, various changes and improvements can be made to the application without departing from the spirit and scope of the application, and these changes and improvements all fall within the scope of the claimed application.

Claims

1. A pole and core wrap tab bolting structure, characterized by, Include: Battery pack (10), the positive and negative of the top end of the battery pack (10) are provided with two core package tabs, the core package tab of the battery pack (10) is covered with a package strip (14) outside, one side of the package strip (14) is punched with a punching hole; Pole (11), the pole (11) is arranged above the battery pack (10), and the pole (11) is arranged between the two adjacent core package tabs; Pressing plate (12), the pressing plate (12) is arranged on both sides of the pole (11), and the pole (11), the pressing plate (12) and the package strip (14) are in threaded connection.

2. The pole column and core pack tab bolting structure of claim 1, wherein: The side of the pressing plate (12) is provided with a first via hole (15), and the two pressing plates (12) are in parallel state.

3. The pole column and core pack tab bolting structure of claim 1, wherein: The package strip (14) is a rectangular strip, and a triangular notch is formed at the middle position of the package strip (14).

4. The pole column and core pack tab bolting structure of claim 1, wherein: The lower half of the pole (11) is in the shape of "J", and the second via hole (16) is formed in the lower half of the pole (11) corresponding to the position of the punching hole.

5. The pole column and core pack tab bolting structure of claim 1, wherein: The pole (11) and the pressing plate (12) are provided with a bolt (13), the bolt (13) is movably penetrated through the second via hole (16) and the first via hole (15) and is threadedly connected with a nut.

6. The pole column and core pack tab bolting structure of claim 1, wherein: The upper half of the pole (11) is a threaded column and is threadedly connected with a nut (18), and the top end of the pole (11) is provided with a threaded connection hole (17).

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