CN210956878U

CN210956878U - Battery structure with high rate performance

Info

Publication number: CN210956878U
Application number: CN201922105233.9U
Authority: CN
Inventors: 严洪桔; 沈两尼; 刘勇
Original assignee: Ganzhou Woneng New Energy Co ltd
Current assignee: Ganzhou Woneng New Energy Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-07
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a battery structure that multiplying power performance is high, including aluminium foil, copper foil, first battery utmost point ear and second battery utmost point ear, be provided with the diaphragm between aluminium foil and the copper foil, copper foil one end is provided with second battery utmost point ear, and first battery utmost point ear sets up on the aluminium foil and lies in the central line of aluminium foil, and aluminium foil one end is convoluteed to the aluminium foil other end, and copper foil one end is convoluteed to the copper foil other end, and the diaphragm other end is convoluteed to the diaphragm one end. The utility model discloses, obviously shorten the required displacement of electron, reduce the polarization internal resistance that the electron removed to promote the multiplying power performance.

Description

Battery structure with high rate performance

Technical Field

The utility model belongs to the technical field of the battery structure, especially, relate to a battery structure that multiplying power performance is high.

Background

At present, most of battery structures, positive and negative electrode tabs are welded at the head of a pole piece, and are rolled to form a lithium battery core, when the battery is charged and discharged, electrons need to pass through an external circuit, so that the electrons need to pass through a current collector (the current collector of the positive electrode is an aluminum foil, and the current collector of the negative electrode is a copper foil) at the tail of the pole piece to reach the tabs at the head of the pole piece and then reach the external circuit, and due to the long path, the polarization internal resistance is large, the final temperature is high, so that when a large current is large, the passing electrons in a unit area are more, the capacity is low.

Therefore, the prior art is to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a battery structure that multiplying power performance is high to mention in solving the background art, obviously shorten the required displacement of electron, reduce the polarization internal resistance that the electron removed, thereby promote the multiplying power performance.

The utility model discloses a battery structure that multiplying power performance is high, including aluminium foil, copper foil, first battery utmost point ear and second battery utmost point ear, be provided with the diaphragm between aluminium foil and the copper foil, copper foil one end is provided with second battery utmost point ear, and first battery utmost point ear sets up on the aluminium foil and lies in the central line of aluminium foil, and aluminium foil one end is convoluteed to the aluminium foil other end, and copper foil one end is convoluteed to the copper foil other end, and the diaphragm other end is convoluteed to the diaphragm one end.

Preferably, the upper top surface of the copper foil is provided with a first dressing, and the lower top surface of the membrane is in contact with the dressing.

Preferably, a second dressing is laid on the lower bottom surface of the copper foil, and the second battery tab is located at the left end of the lower top surface of the copper foil.

Preferably, the left side and the right side of the bottom surface under the aluminium foil are respectively paved with a third dressing and a fourth dressing, and the first battery tab is positioned between the third dressing and the fourth dressing.

Preferably, the fifth dressing and the sixth dressing are respectively paved on the left side and the right side of the upper top surface of the aluminum foil.

The utility model discloses a battery structure that multiplying power performance is high sets up on the aluminium foil and is located the central line of aluminium foil based on first battery utmost point ear, can obviously shorten the required displacement of electron, reduces the polarization internal resistance that the electron removed to promote multiplying power performance.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a battery structure with high rate capability according to the present invention;

fig. 2 is a schematic structural disassembly diagram of a conventional battery structure described in the background art;

fig. 3 is a schematic view of the structure split of the battery structure with high rate capability of the present invention;

fig. 4 is the utility model discloses the multiplying power capability test data of battery structure that the multiplying power performance is high.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It is noted that relative terms such as "first," "second," and the like may be used to describe various components, but these terms are not intended to limit the components. These terms are only used to distinguish one component from another component. For example, a first component could be termed a second component, and, similarly, a second component could be termed a first component, without departing from the scope of the present invention. The term "and/or" refers to a combination of any one or more of the associated items and the descriptive items.

As shown in fig. 2, in the conventional battery structure described in the background art; most of battery structures, current positive and negative pole utmost point ear welding is at the pole piece head (current positive pole utmost point ear 21 sets up in positive plate 11 one end, current negative pole utmost point ear 61 sets up in negative plate 51 one end), become lithium cell electricity core through coiling production, when the battery charge-discharge, the electron is because of needing to pass through external circuit, therefore electron e-the utmost point ear that reaches the pole piece head through the mass flow body (the mass flow body of positive pole is the aluminium foil, the mass flow body of negative pole is the copper foil) in the afterbody of pole piece reachs external circuit again, because of the route is longer, lead to polarising the internal resistance on the large side and final temperature is higher, when making heavy current discharge (the electric current is bigger, the electron that.

As shown in fig. 1 and fig. 3, fig. 1 is a schematic structural diagram of a battery structure with high rate capability according to the present invention; fig. 3 is the utility model discloses the structure split schematic diagram of battery structure that multiplying power performance is high.

The utility model discloses a battery structure that multiplying power performance is high, including aluminium foil 1, copper foil 5, first battery utmost point ear 3 and second battery utmost point ear 6, be provided with diaphragm 4 between aluminium foil and the copper foil, second battery utmost point ear 6 sets up in 5 one ends of copper foil, and first battery utmost point ear 3 sets up on aluminium foil 1 and lies in aluminium foil 1's central line, and 1 one end A of aluminium foil convolutes to 1 other end B of aluminium foil, and 5 one end E of copper foil convolutes to 5 other end F of copper foil, and diaphragm one end C convolutes to diaphragm other end D. The utility model discloses a battery structure that multiplying power performance is high sets up on the aluminium foil and be located the central line of aluminium foil based on first battery utmost point ear, can obviously shorten electron e-required displacement (fig. 3), reduces the polarization internal resistance that the electron removed to promote multiplying power performance. The diaphragm comprises an aluminum plastic film.

Preferably, the upper top surface of the copper foil 5 is laid with a first dressing 31 against which the lower top surface of the membrane 4 abuts. Preferably, a second dressing 32 is laid on the lower bottom surface of the copper foil 5, and a second battery tab is located at the left end of the lower top surface of the copper foil. Preferably, a third dressing 33 and a fourth dressing 34 are respectively paved on the left side and the right side of the lower bottom surface of the aluminum foil, and the first battery tab is positioned between the third dressing and the fourth dressing. Preferably, a fifth dressing 35 and a sixth dressing 36 are respectively laid on the left and right sides of the upper top surface of the aluminum foil. The dressing setting is favorable to bonding between diaphragm and the pole piece.

As shown in fig. 4, fig. 4 is the multiplying power performance test data of the battery structure with high multiplying power performance of the present invention. From the above data it can be seen that: 1. the 1C multiplying power of the first battery tab 3 which is arranged on the aluminum foil 1 and is positioned on the central line of the aluminum foil 1 is 91.93%, 90.58% and 89.45%, and is higher than the multiplying power (78.34%, 79.73%) of the tab welded at the head position (in the prior art, shown in figure 2) by more than 10%; 2. the 1.5C multiplying power of the first battery tab 3, which is arranged on the aluminum foil 1 and is positioned on the central line of the aluminum foil 1, is 79.69 percent, and is higher than the multiplying power (57.96 percent) of the tab welded at the head position by more than 21.73 percent; 3. the 2C magnification of the first battery tab 3, which is provided on the aluminum foil 1 and is located on the center line of the aluminum foil 1, is 63.33%, which is higher than the magnification (38.42%) of the tab welded at the head position by 24.91% or more.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a battery structure that multiplying power performance is high, its characterized in that, includes aluminium foil, copper foil, first battery utmost point ear and second battery utmost point ear, is provided with the diaphragm between aluminium foil and the copper foil, and copper foil one end is provided with second battery utmost point ear, and first battery utmost point ear sets up on the aluminium foil and lies in the central line of aluminium foil, and aluminium foil one end is convoluteed to the aluminium foil other end, and copper foil one end is convoluteed to the copper foil other end, and diaphragm one end is convoluteed to the diaphragm other end.

2. The high rate capability battery structure of claim 1 wherein the upper top surface of the copper foil is coated with a first dressing and the lower top surface of the separator is pressed against the dressing.

3. The high rate capability battery structure of claim 1 wherein the lower bottom surface of the copper foil is coated with a second dressing and the second battery tab is located at the left end of the lower top surface of the copper foil.

4. The battery structure with high rate capability of claim 1, wherein a third dressing and a fourth dressing are respectively laid on the left side and the right side of the lower bottom surface of the aluminum foil, and the first battery tab is positioned between the third dressing and the fourth dressing.

5. The battery structure with high rate capability according to claim 1, wherein a fifth dressing and a sixth dressing are respectively laid on the left and right sides of the upper top surface of the aluminum foil.