TWM529943U - Battery structure - Google Patents

Abstract

A battery structure includes an anode strip, a cathode strip and a separating strip. The anode strip, the cathode strip and the separating strip include a plurality of hexagonal anode pieces, a plurality of hexagonal cathode pieces and a plurality of hexagonal separating pieces, respectively. The anode strip, the cathode strip and the separating strip stack with one another so as to form a hexagonal battery stacked layers. In the hexagonal battery stacked layers, one of the hexagonal separating pieces is disposed between the two adjacent hexagonal anode piece and hexagonal cathode piece.

Description

Battery structure

This case relates to a battery structure, and in particular to a stacked battery structure.

Lithium secondary batteries have been widely used as energy sources for various electronic products and mobile devices due to their high energy density and operating voltage advantages. Among them, according to the appearance can be divided into a pouch cell, a cylindrical battery and a prismatic battery, wherein the shape of the soft pack battery is easily changed because the internally stacked electrodes Group, size can be easily designed and adjusted; and the external battery case, the accommodation space can easily correspond to the size structure of the electrode group, which is very suitable for consumer electronic products and mobile devices, so the focus is now on the soft pack battery.

In general, the electrode group inside the soft pack battery is mainly composed of a positive electrode sheet, a negative electrode sheet, and a separator between the positive and negative electrode sheets. If a cylindrical, rectangular or circular-shaped battery is required, the battery pack can be wound into a cylindrical shape by a winding method, then flattened into a rectangular shape, or flexed and then turned into an arc shape. However, the battery produced by the winding method is limited to the above-mentioned appearance. If a polygon, an arc edge, or an arbitrary shape is required, the desired sheet shape is cut out in advance, and the layers are stacked, and the positive electrode sheets and the negative electrode sheets are respectively connected. However, in the stacked battery, the electrode wires need to be connected to the electrode pads one by one, and the process steps are complicated and the yield is low.

The present invention provides a battery structure that is simple in process and high in yield.

A battery structure of the present invention comprises a positive electrode strip, a negative electrode strip and a separator strip. The positive electrode strip includes a plurality of hexagonal positive electrode sheets connected in series. The negative electrode strip includes a plurality of hexagonal negative electrode sheets connected in series. The spacer strip comprises a plurality of hexagonal spacers connected in series, wherein the positive strip, the strip and the strip are superposed on each other and alternately flipped, and a hexagonal battery stack is stacked, in the hexagonal battery stack Any one of the hexagonal separators is sandwiched between two adjacent hexagonal positive electrode sheets and a hexagonal negative electrode sheet.

In an embodiment of the present invention, the hexagon of the hexagonal battery stack is divided into three sets of opposite sides, and a first set of opposite sides of the hexagon of the hexagonal battery stack In the cross section, the hexagonal positive electrode sheets are continuously connected, and the hexagonal negative electrode sheets are separated from each other, and the hexagonal separators are separated from each other.

In an embodiment of the present invention, in the cross section of a second set of opposite sides of a hexagon of a hexagonal battery stack, the hexagonal spacers are continuously connected, and the hexagonal negative electrodes are connected. The sheets are separated from each other, and these hexagonal positive electrode sheets are separated from each other.

In an embodiment of the present invention, the hexagonal negative electrode sheets are continuously connected in a cross section of a third set of opposite sides of a hexagon of a hexagonal battery stack, and the hexagonal shapes are isolated. The sheets are separated from each other, and these hexagonal positive electrode sheets are separated from each other.

In an embodiment of the present invention, the area of each of the hexagonal spacers is greater than or equal to the area of the hexagonal positive electrode, and the area of each of the hexagonal spacers is greater than or equal to the area of the hexagonal negative electrode.

In an embodiment of the present invention, the battery structure further includes a positive lead and a negative lead. The positive electrode is connected to one of the hexagonal positive plates. The negative electrode lead is connected to one of the hexagonal negative electrode sheets.

In an embodiment of the present invention, the battery structure further includes a battery case, the hexagonal battery stack is disposed in the battery case, and the positive wire and the negative wire extend from the battery case to the outside of the battery case.

Based on the above, the battery structure of the present invention is superposed on each other by a plurality of hexagonal positive electrode sheets, a plurality of hexagonal negative electrode sheets, and a plurality of hexagonal separators arranged in series, and the negative electrode strip and the separator strip are stacked on each other. Alternately flipped and stacked hexagonal battery stacks. Since the hexagonal positive electrode sheets and the hexagonal negative electrode sheets are respectively connected to each other, the positive electrode wires and the negative electrode wires are connected to one of the hexagonal positive electrode sheets and the hexagonal negative electrode sheets. It is not necessary to connect to each of the hexagonal positive electrode sheets and the hexagonal negative electrode sheets one by one. Compared with the general stacked battery, the battery structure of the present invention is relatively simple to manufacture. In addition, since the hexagonal shape of the hexagonal battery stack is closer to a circle than the rectangle, the hexagonal battery stack can have a higher space utilization if it is housed in a circular casing.

In order to make the above features and advantages of the present invention more comprehensible, the following embodiments are described in detail with reference to the accompanying drawings.

1 is a schematic view of a battery structure in accordance with an embodiment of the present disclosure. 2 is a schematic view of a positive electrode strip, a negative electrode strip, and a separator strip of the battery structure of FIG. 1. Referring to FIG. 1 and FIG. 2 , the battery structure 10 of the present embodiment includes a positive electrode strip 110 , a negative electrode strip 120 , a separator strip 130 , a positive electrode lead 12 , a negative lead 14 , and a battery case 16 . In FIG. 1, in order to clearly show the structure inside the battery case 16, the battery case 16 is indicated by a broken line, and the positive electrode strip 110, the negative electrode strip 120, and the separator strip 130 are indicated by lines having different thicknesses. In addition, in FIG. 1, in order to clearly show the layers, a large pitch between the layers is shown, and the actual battery structure 10 is a relatively flat type. That is, although the vertical planes connected to the different layer hexagons in Fig. 1 show a larger height, in reality, the height of the vertical planes connected to the different layer hexagons is very small. Thus, in Figure 2, adjacent hexagons may be directly connected. Of course, a small rectangular area can also be reserved between adjacent hexagons to connect adjacent hexagons.

As shown in FIG. 2, the positive electrode strip 110 includes a plurality of hexagonal positive electrode sheets P1 to P5 connected in series. The negative electrode strip 120 includes a plurality of hexagonal negative electrode sheets N1 to N4 connected in series. The spacer strip 130 includes a plurality of hexagonal spacers S1 to S10 connected in series. In this embodiment, the area of each of the hexagonal spacers S1 to S10 is equal to the area of each of the hexagonal positive electrodes P1 to P5, and the area of each of the hexagonal spacers S1 to S10 is equal to each of the hexagonal negative plates N1. ~N4 area. However, in other embodiments, the area of each of the hexagonal spacers S1 to S10 may be larger than the area of each of the hexagonal positive electrodes P1 to P5, and the area of each of the hexagonal spacers S1 to S10 may be larger than each of the six. The area of the edge-shaped negative electrode sheets N1 to N4 ensures that the hexagonal separators S1 to S10 can separate two adjacent hexagonal positive electrode sheets P1 to P5 and hexagonal negative electrode sheets N1 to N4, thereby avoiding two phases. The adjacent hexagonal positive electrode sheets P1 to P5 and the hexagonal negative electrode sheets N1 to N4 are electrically connected.

In the present embodiment, the number of hexagonal positive electrode sheets Pi is n, the number of hexagonal negative electrode sheets Ni is n-1, the number of hexagonal spacers Si is 2n, and n hexagonal positive electrode sheets P1~ P5 is numbered sequentially as Pi, i=1~n, n hexagonal negative plates N1~N4 are sequentially numbered as Ni, i=1~n-1, and 2n hexagonal spacers S1~S10 are numbered sequentially. Is Si, i = 1~2n.

More specifically, the number of hexagonal positive electrode sheets Pi is five, the number of hexagonal negative electrode sheets Ni is four, and the number of hexagonal separators Si is ten, and the five hexagonal positive electrode sheets are The sequence numbers are P1~P5, and the four hexagonal negative plates are sequentially numbered N1-N4, and the 10 hexagonal spacers are sequentially numbered S1-S10. Of course, the relationship between the number of the hexagonal positive electrode sheets P1 to P5, the hexagonal negative electrode sheets N1 to N4, and the hexagonal spacers S1 to S10 is not limited to the above.

In the present embodiment, the positive electrode strip 110, the separator strip 130, and the negative electrode strip 120 are superposed on each other and alternately flipped, and a hexagonal battery stack 100 is stacked. Next, how the positive electrode strip 110, the spacer strip 130, and the negative electrode strip 120 are folded out of the hexagonal battery stack 100 will be described in detail. 3 through 10 are schematic views of a manufacturing process of the battery structure 10 of Fig. 1. It should be noted that, in order to maintain the simplicity of the drawing, only a part of the positive electrode strip 110, the separator strip 130 and the negative electrode strip 120 are illustrated in FIGS. 3 to 10. In the present embodiment, the number of the hexagonal positive electrode sheets P1 to P5, the hexagonal negative electrode sheets N1 to N4, and the hexagonal spacers S1 to S10 of the positive electrode strip 110, the separator strip 130, and the negative electrode strip 120 is as shown in FIG. As an example. Of course, in other embodiments, the number of the hexagonal positive electrode, the hexagonal negative electrode, and the hexagonal separator of the positive electrode strip 110, the separator strip 130, and the negative electrode strip 120 can be adjusted according to actual use conditions.

First, please refer to FIG. 3 first, the isolation strips 130 are horizontal, and the hexagonal spacers S1~S10 are S1~S10 from left to right (only S1~S5 are indicated in the figure). The positive electrode strip 110 is disposed obliquely from the upper left to the lower right, so that the angle between the extending directions of the positive electrode strip 110 and the spacer strip 130 is 60 degrees. These hexagonal positive electrode sheets P1 to P5 are P1 to P5 from the upper left to the lower right (only P1 to P3 are shown in the drawing), and the hexagonal positive electrode sheet P1 is disposed on the hexagonal spacer S1. Next, as shown in FIG. 4, the spacer strip 130 is flipped over from the right to the left, and the hexagonal spacer S2 is stacked on the hexagonal positive electrode tab P1.

Then, as shown in FIG. 5, the negative electrode strip 120 extends from the lower left to the upper right, and the hexagonal negative electrode sheets N1 to N4 are N1 to N4 from the lower left to the upper right, and the hexagonal negative electrode sheets N1 are stacked and arranged into a hexagonal isolation. On the slice S2. The angle between the extending directions of the hexagonal positive electrode sheets P1 to P5, the hexagonal negative electrode sheets N1 to N4 and the hexagonal spacers S2 to S10 is 120 degrees, and then, as shown in Fig. 6, the hexagon is formed. The spacers S3 to S10 are flipped back to the right from the left, and the hexagonal spacers S3 are stacked and arranged on the hexagonal negative tab N1.

Next, as shown in FIG. 7, the positive electrode strip 110 is flipped from the lower right to the upper left, and the hexagonal positive electrode sheets P2 are stacked and arranged on the hexagonal spacer S3. Further, as shown in FIG. 8, the spacer strip 130 is flipped over from the right to the left, and the hexagonal spacer S4 is stacked on the hexagonal positive electrode tab P2.

Next, as shown in FIG. 9, the negative electrode strip 120 is flipped from the upper right to the lower left, and the hexagonal negative electrode sheets N2 are stacked on the hexagonal spacer S4. Then, as shown in FIG. 10, the hexagonal spacers S5 to S10 are flipped back from the left to the right, and the hexagonal spacers S5 are stacked and arranged on the hexagonal negative tab N2. Next, the above flip mode is continued, and the hexagonal battery stack 100 as shown in FIG. 1 is stacked.

Referring back to FIG. 1, in the hexagonal battery stack 100, the hexagonal positive electrode sheet Pi is disposed between the two hexagonal spacers S2i-1, S2i, and the hexagonal negative electrode sheet Ni is disposed in two hexagons. Between the separators S2i and S2i+1, any one of the hexagonal separators S2i+1 between the two adjacent hexagonal positive electrode sheets Pi+1 and the hexagonal anode sheets Ni is sandwiched between two or six hexagons. One of the hexagonal spacers S2i is sandwiched between the positive electrode tab Pi and the hexagonal negative electrode tab Ni. More specifically, where i=1~n.

In the present embodiment, n is exemplified by 5. That is, in the hexagonal battery stack 100 of the present embodiment, from the bottom to the top are a hexagonal spacer S1, a hexagonal positive electrode P1, a hexagonal spacer S2, and a hexagonal negative electrode, respectively. N1, hexagonal spacer S3, hexagonal positive electrode P2, hexagonal spacer S4, hexagonal negative electrode N2, hexagonal spacer S5, hexagonal positive electrode P3, hexagonal spacer S6 , hexagonal negative electrode sheet N3, hexagonal separator S7, hexagonal positive electrode sheet P4, hexagonal separator S8, hexagonal negative electrode N4, hexagonal separator S9, hexagonal positive electrode sheet P5, six Edge spacer S10.

In the present embodiment, the hexagonal battery stack 100 is disposed in the battery case 16, the positive electrode lead 12 is connected to one of the hexagonal positive electrode sheets P1 to P5, and the negative electrode lead 14 is connected to one of the hexagonal negative electrode sheets N1. ~N4, and the positive electrode lead 12 and the negative electrode lead 14 extend from the inside of the battery case 16 to the outside of the battery case 16. Since the hexagonal positive electrode sheets P1 to P5 are connected to the hexagonal negative electrode sheets N1 to N4, respectively, the positive electrode lead 12 and the negative electrode lead 14 are connected to one of the hexagonal positive electrode sheets P1 to P5. And the hexagonal negative electrode sheets N1 to N4 can be connected to each of the hexagonal positive electrode sheets P1 to P5 and the hexagonal negative electrode sheets N1 to N4 one by one. In FIG. 1, the positive electrode lead 12 is connected to the hexagonal positive electrode sheet P1, and the negative electrode lead 14 is connected to the hexagonal negative electrode sheet N4 as an example, but the positive electrode lead 12 and the negative electrode lead 14 are not limited to which hexagonal shape is connected. Positive electrode sheets P1 to P5 and hexagonal negative electrode sheets N1 to N4. Compared with the general stacked battery, the battery structure 10 of the present invention is relatively simple to manufacture.

It is worth mentioning that the hexagon of the hexagonal battery stack 100 is divided into three sets of opposite sides, and FIGS. 11 to 13 are schematic cross-sectional views along line A-A, line B-B and line C-C of FIG. 1, respectively. If cut along the AA line of FIG. 1, as a section of the two sides of a first pair of hexagons that cut the hexagonal battery stack 100, refer to FIG. 11, in which the hexagons are formed. The positive electrode sheets P1 to P5 are continuously connected, and the hexagonal negative electrode sheets N1 to N4 are separated from each other, and the hexagonal separators S1 to S10 are separated from each other. That is to say, the cross section of Fig. 11 can be seen that the track of the positive electrode strip 110 is reversely turned over.

Cut along the line B-B of Fig. 1 as a cross section of a second set of opposite sides of a hexagon that cuts the hexagonal battery stack 100. Referring to FIG. 12, in the cross section, the hexagonal spacers S1 to S10 are continuously connected, and the hexagonal negative electrode sheets N1 to N4 are separated from each other, and the hexagonal positive electrode sheets P1 to P5 are separated from each other. That is, the cross-section of FIG. 12 can be seen that the spacer strip 130 repeatedly flips the track of the stack.

If cut along the line C-C of Fig. 1, as a section of a third set of opposite sides of the hexagon that cuts the hexagonal battery stack 100. Referring to Fig. 13, in this cross section, the hexagonal negative electrode sheets N1 to N4 are continuously connected, and the hexagonal spacers S1 to S10 are separated from each other, and the hexagonal positive electrode sheets P1 to P5 are separated from each other. That is, the cross section of FIG. 13 can be seen that the negative electrode strip 120 repeatedly flips the track of the stack. Moreover, as can be seen from FIG. 11 to FIG. 13, the positive electrode strip 110, the negative electrode strip 120, and the separator strip 130 are respectively turned over on different three sets of sides.

Further, in the above paragraphs, only the relationship among the number of the hexagonal positive electrode sheets P1 to P5, the hexagonal negative electrode sheets N1 to N4, and the hexagonal spacers S1 to S10 is exemplified. In other embodiments, the number of hexagonal positive plates may be n-1, the number of hexagonal negative plates is n, and the number of hexagonal spacers is 2n. That is to say, the number of hexagonal positive electrode sheets and hexagonal negative electrode sheets can also be opposite to that of the embodiment of FIG. 1. When configuring, the hexagonal positive electrode sheets P1 to P5 and six sides of FIGS. 3 to 10 can be used. The positions of the negative electrode sheets N1 to N4 may be interchanged.

In this embodiment, if n hexagonal positive electrode sheets are sequentially numbered Pi, i=1~n-1, n hexagonal negative electrode sheets are sequentially numbered as Ni, i=1~n, 2n The hexagonal spacers are sequentially numbered Si, i=1~2n, and the hexagonal negative electrode Ni is disposed between the two hexagonal spacers S2i-1 and S2i, and the hexagonal positive electrode Pi is disposed in two. Between the hexagonal spacers S2i and S2i+1, where i=1~n.

Further, in another embodiment not shown, the number of hexagonal positive electrode sheets and hexagonal negative electrode sheets may be the same. For example, the positive electrode strip 110, the negative electrode strip 120, and the separator strip 130 respectively include n hexagonal positive electrode sheets, n hexagonal negative electrode sheets, and 2n+1 hexagonal spacer sheets. If n hexagonal positive plates are sequentially numbered Pi, i=1~n, n hexagonal negative plates are numbered sequentially as Ni, i=1~n, 2n+1 hexagonal spacers The sequence number is Si, i=1~2n+1. In the hexagonal battery stack in which the positive electrode strip, the negative electrode strip and the separator strip are stacked, one of the hexagonal positive electrode sheet Pi and the hexagonal negative electrode sheet Ni is disposed on the two hexagonal separator S2i- 1. Between S2i and the other between the two hexagonal spacers S2i and S2i+1, where i=1~n.

Therefore, the relationship between the number of the hexagonal positive electrode sheets P1 to P5, the hexagonal negative electrode sheets N1 to N4, and the hexagonal spacers S1 to S10 on the positive electrode strip 110, the negative electrode strip 120, and the separator strip 130 can be changed as long as Any one of the hexagonal separator sheets S1 to S10 may be sandwiched between any two adjacent hexagonal positive electrode sheets P1 to P5 and hexagonal negative electrode sheets N1 to N4.

In addition, it is worth mentioning that, in FIG. 1, the shape of the battery case 16 is close to the shape of the hexagonal battery stack 100, and assumes the shape of a hexagonal column so that the battery case 16 is relatively high. Space utilization. However, in other embodiments, the shape of the battery housing 16 may also be a cylinder or other shape. Compared with the conventional battery stack (not shown) in the shape of a cube, if placed in the cylindrical battery case 16 wastes a lot of space, the hexagonal battery stack 100 of the present embodiment is The cylindrical battery housing 16 can still have better space utilization. In addition, the material of the battery case 16 may be an aluminum plastic film, but the material of the battery case 16 is not limited to the above.

In summary, the battery structure of the present invention is stacked on the positive electrode strip, the negative electrode strip and the separator strip formed by a plurality of hexagonal positive electrode sheets, a plurality of hexagonal negative electrode sheets and a plurality of hexagonal separators connected in series. Set, and stack the hexagonal battery stack. Since the hexagonal positive electrode sheets and the hexagonal negative electrode sheets are respectively connected to each other, the positive electrode wires and the negative electrode wires are connected to one of the hexagonal positive electrode sheets and the hexagonal negative electrode sheets. It is not necessary to connect to each of the hexagonal positive electrode sheets and the hexagonal negative electrode sheets one by one. Compared with the general stacked battery, the battery structure of the present invention is relatively simple to manufacture. In addition, since the hexagonal shape of the hexagonal battery stack is closer to a circle than the rectangle, the hexagonal battery stack can have a higher space utilization if it is housed in a circular casing.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present case. Any person having ordinary knowledge in the technical field can protect the case without making any changes or refinements without departing from the spirit and scope of the present case. The scope is subject to the definition of the scope of the patent application.

10‧‧‧Battery structure
12‧‧‧ positive lead
14‧‧‧Negative lead
16‧‧‧ battery housing
100‧‧‧ hexagonal battery stack
110‧‧‧ positive strip
P1~P5‧‧‧hexagonal positive electrode
120‧‧‧negative strip
N1~N4‧‧‧ hexagonal negative electrode
130‧‧‧Isolation strip
S1~S10‧‧‧ hexagonal spacer

1 is a schematic view of a battery structure in accordance with an embodiment of the present disclosure. 2 is a schematic view of a positive electrode strip, a negative electrode strip, and a separator strip of the battery structure of FIG. 1. 3 to 10 are schematic views showing a manufacturing process of the battery structure of Fig. 1. 11 to 13 are schematic cross-sectional views taken along line A-A, line B-B, and line C-C of Fig. 1, respectively.

10‧‧‧Battery structure

12‧‧‧ positive lead

14‧‧‧Negative lead

16‧‧‧ battery housing

100‧‧‧ hexagonal battery stack

P1~P5‧‧‧hexagonal positive electrode

N1~N4‧‧‧ hexagonal negative electrode

S1~S10‧‧‧ hexagonal spacer

Claims (7)

A battery structure comprising: a positive electrode strip comprising a plurality of hexagonal positive electrode sheets connected in series; a negative electrode strip comprising a plurality of hexagonal negative electrode sheets connected in series; and a separator strip comprising a plurality of six connected in series An edge spacer, wherein the positive strip, the spacer strip and the negative strip overlap each other, and a hexagonal battery stack is stacked, and in the hexagonal battery stack, any two adjacent six One of the hexagonal spacers is sandwiched between the edged positive electrode tab and the hexagonal negative electrode tab. The battery structure according to claim 1, wherein the hexagon of the hexagonal battery stack is divided into three sets of opposite sides, and a first group of hexagons of the hexagonal battery stack In the cross section of the opposite sides, the hexagonal positive electrode sheets are continuously connected, the hexagonal negative electrode sheets are separated from each other, and the hexagonal spacer sheets are separated from each other. The battery structure of claim 2, wherein the hexagonal spacers are continuously connected in a cross section of a second set of opposite sides of a hexagon of the hexagonal battery stack The hexagonal negative electrode sheets are separated from each other, and the hexagonal positive electrode sheets are separated from each other. The battery structure according to claim 2, wherein the hexagonal negative electrode sheets are continuously connected in a cross section of a third pair of opposite sides of a hexagon of the hexagonal battery stack. The hexagonal spacers are separated from each other, and the hexagonal positive electrodes are separated from each other. The battery structure according to claim 1, wherein an area of each of the hexagonal spacers is greater than or equal to an area of the hexagonal positive electrode, and an area of each of the hexagonal spacers is greater than or equal to the six The area of the edge-shaped negative electrode sheet. The battery structure according to claim 1, further comprising: a positive electrode connected to one of the hexagonal positive electrode sheets; and a negative electrode connected to one of the hexagonal negative electrode sheets. The battery structure of claim 6, further comprising: a battery case, the hexagonal battery stack is disposed in the battery case, and the positive lead and the negative lead extend from the battery housing to Outside the battery case.