CN116706201A

CN116706201A - Battery, battery processing equipment and battery manufacturing process

Info

Publication number: CN116706201A
Application number: CN202310930756.5A
Authority: CN
Inventors: 陈治; 刘俊龙; 彭祖铃; 蓝吉; 沈玉阳; 谈裕新
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2023-09-05

Abstract

The invention relates to the technical field of batteries, in particular to a battery, a battery processing device and a battery manufacturing process, wherein a battery core of the battery comprises two layers of diaphragms, the two layers of diaphragms are mutually connected in a hot melting way at a connecting position, the connecting position is arranged along two first paths and at least two second paths, the first paths and the second paths are continuous lines, the first paths extend along a first direction, the first direction is the length direction of the diaphragms, the two first paths are respectively positioned at two edges of the diaphragms in a second direction, the second direction is perpendicular to the first direction, the second paths extend along a second direction and are connected between the two first paths, and the at least two second paths are arranged at intervals along the first direction; the two layers of diaphragms are separated into at least one accommodating space by a connecting position, each accommodating space is internally provided with a pole piece structure, and at the connecting position of the two layers of diaphragms, the body of the pole piece structure is not connected with the diaphragms, and the pole lugs of the pole piece structure extend out of the accommodating space.

Description

Battery, battery processing equipment and battery manufacturing process

Technical Field

The invention relates to the technical field of batteries, in particular to a battery, processing equipment of the battery and a manufacturing process of the battery.

Background

In the design of the existing battery, a plurality of pole pieces are arranged at intervals along the extending direction of the diaphragms, two layers of diaphragms are connected only at the positions between the adjacent pole pieces, the pole pieces are easy to separate from the containing area between the two layers of diaphragms along the width direction, and the width direction is perpendicular to the extending direction of the diaphragms and parallel to the diaphragms. In addition, the two layers of diaphragms are of a discontinuous structure at the joint between two adjacent pole pieces, so that loss of electrolyte and other substances is easy to cause, and short circuit between the adjacent pole pieces is easy to cause short circuit of an electric core.

Disclosure of Invention

The invention aims to overcome at least one defect of the prior art and provide a battery with a better positioning effect of a diaphragm on a pole piece and a battery cell with a small possibility of short circuit.

In order to achieve the above purpose, the invention adopts the following technical scheme:

according to one aspect of the present invention, there is provided a battery, wherein: the battery comprises a battery core, wherein the battery core comprises two layers of diaphragms, the two layers of diaphragms are mutually connected in a hot melting mode at a connecting position, the connecting position is arranged along two first paths and at least two second paths, the first paths and the second paths are continuous linear, the first paths extend along a first direction, the first direction is the length direction of the diaphragms, the two first paths are respectively positioned at two edges of the diaphragms in a second direction, the second direction is perpendicular to the first direction, the second paths extend along the second direction and are connected between the two first paths, and at least two second paths are arranged at intervals along the first direction; the two layers of diaphragms are separated into at least one containing space by the connecting position, each containing space is internally provided with a pole piece structure, the connecting position of the two layers of diaphragms is provided with a body of the pole piece structure, the body of the pole piece structure is not connected with the diaphragms, and the pole lugs of the pole piece structure extend out of the containing space.

Another main object of the present invention is to overcome at least one of the above drawbacks of the prior art, and to provide a processing device for a battery, which has a better positioning effect of a separator on a pole piece and is not easy to short-circuit a battery cell.

according to another aspect of the present invention, there is provided a battery processing apparatus, wherein the battery processing apparatus includes two unreeling mechanisms, a first feeding mechanism, two thermo-compression rollers, and a thermo-compression member; the two unreeling mechanisms are a first unreeling mechanism and a second unreeling mechanism respectively, the first unreeling mechanism and the second unreeling mechanism are used for unreeling a first diaphragm material roll and a second diaphragm material roll respectively, and a first diaphragm after unreeling the first diaphragm material roll extends along a first direction; the first feeding mechanism is positioned at one side of the first unreeling mechanism along the first direction and is used for placing the pole piece on the unreeled first diaphragm, the second unreeling mechanism is positioned at one side of the first feeding mechanism, which is opposite to the first unreeling mechanism, and the second diaphragm after unreeling of the second diaphragm material extends to the upper part of the pole piece; the two hot-pressing rollers and the hot-pressing piece are respectively positioned at one side of the second unreeling mechanism, which is opposite to the first unreeling mechanism, the two hot-pressing rollers are arranged up and down, the axis of each hot-pressing roller is parallel to the first diaphragm and perpendicular to the first direction, two first hot-pressing strips are arranged on the periphery of each hot-pressing roller, each first hot-pressing strip is in a circular shape, the two first hot-pressing strips are respectively positioned at the two side edges of each hot-pressing roller in the second direction, and each hot-pressing piece is in a strip shape extending along the second direction; the hot pressing rollers are used for hot pressing the two layers of diaphragms to enable the connection positions of the two layers of diaphragms to be arranged along a first path, the hot pressing members are used for hot pressing the two layers of diaphragms to enable the connection positions of the two layers of diaphragms to be arranged along a second path, the two first paths are respectively located at two edges of the diaphragms in a second direction, the first path extends along the first direction, and the second path is located between two adjacent pole pieces and extends along the second direction.

Another main object of the present invention is to overcome at least one of the above drawbacks of the prior art, and to provide a process for manufacturing a battery with a better positioning effect of the separator on the pole piece and with a cell which is not easy to short.

according to still another aspect of the present invention, there is provided a manufacturing process of a battery, including: providing the battery processing equipment provided by the invention; the traction mechanism is utilized to traction one end of each of the two layers of diaphragms to enable the first unreeling mechanism and the second unreeling mechanism to unreel towards the hot bundling working position respectively; the pole piece structure is conveyed between the two layers of diaphragms by utilizing a first feeding mechanism; and hot-pressing the two layers of diaphragms by using a hot-pressing roller and a hot-pressing piece of the hot-rolling station.

According to the technical scheme, the battery processing equipment and the battery manufacturing process provided by the invention have the advantages and positive effects that:

the invention connects two layers of diaphragms by hot melting at a connecting position, wherein the connecting position comprises a first path and a second path, the first path and the second path are continuous lines, the first path extends along a first direction, the two first paths are respectively positioned at two edges of the diaphragm in a second direction, the second path extends along the second direction and is connected between the two first paths, at least two second paths are arranged at intervals along the first direction, and the first direction and the second direction are respectively the length direction and the width direction of the diaphragm. The two layers of diaphragms are separated into at least one accommodating space by a connecting position, each accommodating space is internally provided with a pole piece structure, and at the connecting position of the two layers of diaphragms, the body of the pole piece structure is not connected with the diaphragms, and the pole lugs of the pole piece structure extend out of the accommodating space. Through the design, the pole piece structure can be positioned in the second direction by utilizing the first path, and the pole piece structure is positioned in the first direction by utilizing the second path, so that the pole piece structure is prevented from generating dislocation in the lamination or winding process, and the pole piece structure is prevented from falling out from the accommodating space along the second direction. Furthermore, as the second path is connected with the first path and adopts a continuous line shape, the invention can avoid the loss of electrolyte and other substances in the containing space containing the pole piece structures and avoid the short circuit between adjacent pole piece structures to cause the short circuit of the battery core.

Drawings

Various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the invention and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is a schematic view showing the structure of a battery cell in an unfolded state according to an exemplary embodiment;

fig. 2 is a schematic cross-sectional view of the cell shown in fig. 1 in a stacked state;

fig. 3 is a schematic view showing a partial structure of a battery cell of a battery in an unfolded state according to another exemplary embodiment;

fig. 4 is a schematic cross-sectional view of the cell shown in fig. 3 in a wound state;

fig. 5 to 9 are schematic structural views of battery cells of a battery according to several other exemplary embodiments, respectively;

fig. 10 is a schematic structural view showing a partial structure of a battery cell of a battery in an unfolded state according to another exemplary embodiment;

FIG. 11 is a schematic cross-sectional view of FIG. 10;

FIG. 12 is a system diagram of a battery processing apparatus according to an exemplary embodiment;

Fig. 13 is a schematic perspective view of the heat pressing roller shown in fig. 12;

fig. 14 is a system diagram of a processing apparatus of a battery according to another exemplary embodiment;

fig. 15 is a schematic perspective view of the heat and pressure roller shown in fig. 14;

fig. 16 to 19 are schematic perspective views of hot-pressing rollers of a battery processing apparatus according to other exemplary embodiments, respectively;

fig. 20 is a system diagram of a processing apparatus of a battery according to another exemplary embodiment.

The reference numerals are explained as follows:

110. a first roll of separator material; 412 non-hot press zone;

111. a first diaphragm; 420, a second hot pressing bar;

120. a second roll of separator material; 510 a first positioning mechanism;

121. a second diaphragm; 520 a second positioning mechanism;

131. a positive plate; 600, auxiliary hot pressing mechanism;

1311. a positive electrode tab; 700, a cutter mechanism;

132. a negative electrode sheet; a, a positive and negative plate diaphragm material belt;

1321. a negative electrode ear; b, a positive plate diaphragm material belt;

140. an intermediate diaphragm; c, accommodating space;

210. A first unreeling mechanism; D1-D4. space;

220. a second unreeling mechanism; e, a diaphragm material belt between the positive and negative plates;

230. a fifth unreeling mechanism; g, gaps;

311. an adsorption mechanical arm; l, length;

312. a third unreeling mechanism; p, connecting points are not connected;

313. a fourth unreeling mechanism; s1, a first path;

320. a second feeding mechanism; s2, a second path;

400. a hot press roller; W1-W2;

410. a first heat press bar; x, a first direction;

411. a hole; y. second direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention are described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the invention, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the invention.

Referring to fig. 1, a schematic structure of a battery cell of a battery according to the present invention in an unfolded state is representatively illustrated. In this exemplary embodiment, the battery proposed by the present invention is described as being applied to a vehicle-mounted battery as an example. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs of the present invention to other types of battery devices, and such changes are still within the principles of the battery presented herein.

As shown in fig. 1, in an embodiment of the present invention, a battery according to the present invention includes a battery cell and a case (not shown in the drawings) in which the battery cell is accommodated. The cell includes two membranes, for example, a first membrane 111 and a second membrane 121. Referring to fig. 2 in conjunction, a schematic cross-sectional view of the cell of fig. 1 in a stacked configuration is representatively illustrated in fig. 2. The structure, connection mode and functional relationship of the main components of the battery according to the present invention will be described in detail with reference to the above drawings.

As shown in fig. 1, in an embodiment of the present invention, two layers of diaphragms are thermally fused to each other at a connection position, the connection position is arranged along two first paths S1 and at least two second paths S2, the first paths S1 and the second paths S2 are each in a continuous line shape, and the first paths S1 and the second paths S2 are connected to each other. Specifically, the first path S1 extends in a first direction X, which is a longitudinal direction of the diaphragm. The two first paths S1 are respectively located at two edges of the diaphragm in a second direction Y, where the second direction Y is perpendicular to the first direction X, and the second direction Y is a width direction of the diaphragm, and the first paths S1 extend along the first direction X. The second paths S2 extend along the second direction Y and are connected between the two first paths S1, and at least two second paths S2 are arranged at intervals along the first direction X. Accordingly, the part of the two layers of diaphragms which are not connected with each other is divided into at least two accommodating spaces C by connecting positions (namely a first path S1 and a second path S2), the bodies of at least two pole pieces are respectively accommodated in at least one accommodating space C, each accommodating space C is internally provided with a pole piece structure, the bodies of the pole piece structure are not connected with the diaphragms at the connecting positions of the two layers of diaphragms, and the pole lugs of the pole piece structure extend out of the accommodating spaces C. Through the design, the pole piece structure can be positioned in the second direction Y by utilizing the first path S1, and simultaneously the pole piece structure is positioned in the first direction X by utilizing the second path S2, so that the pole piece structure is prevented from generating dislocation in the lamination or winding process, and the pole piece structure is prevented from falling out from the accommodating space C along the second direction Y. Furthermore, since the second path S2 is connected to the first path S1 and is in a continuous line shape, the invention can avoid the loss of substances such as electrolyte in the accommodating space C accommodating the pole piece structures, and avoid the short circuit between adjacent pole piece structures to cause the short circuit of the battery core.

Specifically, by adopting the design, the battery provided by the invention has at least the following advantages: according to the invention, the two layers of diaphragms are connected and packaged through the connection position comprising the first path S1 and the second path S2, so that the positive electrode and the negative electrode of the battery cell are completely isolated, the problem of short circuit of the battery cell is fundamentally avoided, and the yield of the battery cell in the subsequent processing and transferring processes is improved. The invention adopts the mode to connect and package two layers of diaphragms, can obviously improve the laminating property of the pole piece and the diaphragms, avoid the electrode displacement in the processing process, improve the bonding performance of the interface between the electrode and the diaphragms, reduce the interface impedance of the battery, reduce the heating and improve the safety. The limit manufacturing is realized, and the two layers of diaphragms are connected on the first path S1 and the second path S2 respectively, so that the ultra-short margin at the joint of the diaphragms is facilitated, the volume utilization rate of the battery core is improved, and the volume energy density of the battery core is further provided. The lamination or winding efficiency is higher, and the pole piece is positioned by adopting the mode, so that the processing efficiency of the battery cell in the subsequent lamination or winding process is further improved. Because the first path S1 and the second path S2 are linear and the contact area of linear welding or hot pressing connection is smaller, the invention can lead the bonding force of the connection position of the two layers of diaphragms through the first path S1 and the second path S2 to be smaller and is easier to disassemble the battery cell during recovery.

As shown in fig. 1, in an embodiment of the present invention, there may be a distance D1 between the edge of the pole piece structure and the corresponding second path S2 along the first direction X, which distance D1 may be, for example, 0.2mm, 0.5mm, 1mm, 2mm, 3mm, etc. Through the design, the invention can avoid the reduction of energy density caused by the increase of the volume of the battery core due to the overlarge distance D1, and can also avoid the connection position of the two layers of diaphragms due to the overlarge distance D1 to be easily contacted with the body of the pole piece structure. In some embodiments, the distance D1 between the edge of the pole piece structure and the corresponding second path S2 may be less than 0.2mm, or may be greater than 3mm, for example, 0.19mm, 3.1mm, and the like, which is not limited to the present embodiment.

As shown in fig. 1, in an embodiment of the present invention, along the second direction Y, there may be a space D2 between the edge of the pole piece structure and the corresponding first path S1 of 0.2mm to 3mm, and the space D2 may be, for example, 0.2mm, 0.5mm, 1mm, 2mm, 3mm, etc. Through the design, the invention can avoid the reduction of energy density caused by the increase of the volume of the battery core due to the overlarge distance D2, and can also avoid the connection position of the two layers of diaphragms due to the overlarge distance D2 to be easily contacted with the body of the pole piece structure. In some embodiments, the distance D2 between the edge of the pole piece structure and the corresponding first path S1 may be less than 0.2mm, or may be greater than 3mm, for example, 0.19mm, 3.1mm, and the like, which is not limited to the present embodiment.

As shown in fig. 1, in an embodiment of the present invention, the width W1 of the first path S1 may be 0.2mm to 2mm, for example, 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, etc. along the second direction Y. Through the design, the invention can avoid the influence of the too small width W1 of the first path S1 on the connection strength, and can avoid the larger dislocation influence on the pole piece structure caused by the too large width W1 of the first path S1 during lamination. In some embodiments, the width W1 of the first path S1 may be less than 0.2mm, or may be greater than 2mm, such as 0.19mm, 2.1mm, and the like, which is not limited to the present embodiment.

As shown in fig. 1, in an embodiment of the present invention, the width W2 of the second path S2 may be 0.2mm to 0.6mm, for example, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, etc. along the first direction X. Through the design, the invention can avoid the influence of the too small width W2 of the second path S2 on the connection strength, and can avoid the larger dislocation influence of the too large width W2 of the second path S2 on the pole piece structure during lamination. In some embodiments, the width W2 of the second path S2 may be less than 0.2mm, or may be greater than 0.6mm, such as 0.19mm, 0.65mm, and the like, which is not limited to the present embodiment.

As shown in fig. 1, in an embodiment of the present invention, the battery cell includes positive electrode tabs 131 and negative electrode tabs 132, each positive electrode tab 131 has one positive electrode tab 1311, each negative electrode tab 132 has one negative electrode tab 1321, the above-described electrode tab structure includes positive electrode tabs 131 and negative electrode tabs 132, and the positive electrode tabs 131 and negative electrode tabs 132 are alternately arranged along the first direction X. Accordingly, the positive electrode sheet 131, the negative electrode sheet 132, and the two separator layers constitute a positive electrode sheet separator material tape a. On the basis, as shown in fig. 2, the positive and negative plate diaphragm material belt A is folded in a Z-shaped mode to form a battery cell. Specifically, two layers of diaphragms are provided between the adjacent positive electrode sheet 131 and negative electrode sheet 132, and the two layers of diaphragms are two portions of the same diaphragm after being folded. Through the design, the invention can avoid the phenomenon of mixing the anode and the cathode in the process of recycling and disassembling the battery cell, and further improve the recycling purity.

Referring to fig. 3 and 4, a schematic structural view of a battery capable of embodying the principles of the present invention in another exemplary embodiment is representatively illustrated in fig. 3 in an expanded state; fig. 4 representatively shows a schematic cross-sectional view of the cell shown in fig. 3 in a wound state.

In an embodiment of the present invention, as shown in fig. 3, the battery cell may include at least one positive electrode sheet 131 and at least one negative electrode sheet 132, where each positive electrode sheet 131 has at least two positive electrode tabs 1311, at least one positive electrode tab 1311 is arranged at intervals along the first direction X, and each negative electrode sheet 132 has one negative electrode tab 1321. Accordingly, the positive electrode sheet 131 and the two separator layers constitute a positive electrode sheet separator material tape B. On this basis, as shown in fig. 4, the positive electrode sheet separator material B and at least one negative electrode sheet 132 are wound to form a battery cell. Specifically, when the positive electrode sheet separator material tape B has two or more negative electrode sheets 132, two separator layers, that is, the above two separator layers, are provided between two adjacent negative electrode sheets 132, and one positive electrode sheet 131. Through the design, after the negative electrode plate 132 is packaged, only the positive electrode plate 131 is required to be detected, so that the detection requirement of the battery cell can be reduced.

Based on the above design that the electrode sheet structure only includes the positive electrode sheet 131, in an embodiment of the present invention, the battery cell may include only one negative electrode sheet 132, and the positive electrode sheet separator material B and the negative electrode sheet 132 are wound to form the battery cell. In some embodiments, the battery cell may also include at least two negative electrode sheets, and the positive electrode sheet separator material B and the negative electrode sheet laminates form the battery cell.

As shown in fig. 3, in an embodiment of the present invention, the positive electrode sheet separator material tape B may include at least two positive electrode sheets 131, and the at least two positive electrode sheets 131 are respectively received in the at least two receiving spaces C. On this basis, the distance D3 between the adjacent two positive tabs 1311 respectively belonging to the adjacent two positive electrode tabs 131 may be equal to the distance D4 between the adjacent two positive electrode tabs 1311 belonging to the same positive electrode tab 131 in the first direction X.

Referring to fig. 5, a schematic diagram of the cell in an expanded state of a battery capable of embodying the principles of the present invention is representatively illustrated in fig. 5.

As shown in fig. 5, in an embodiment of the present invention, for the positive and negative sheet separator material tape a, the first path S1 of the connection position of the two separator may have an unconnected point P at which the two separator is unconnected. Through the design, when the battery cell is recovered, the disassembly of the two layers of diaphragms is convenient and labor-saving by using the non-connection point P, so that the pole pieces are convenient to separate and recover.

As shown in fig. 5, based on the design with the non-connection point P on the first path S1, in an embodiment of the present invention, the maximum width of the non-connection point P may be smaller than the width of the first path S1 along the second direction Y, and taking the non-connection point P as an example, the non-connection point P is circular, so called "maximum width" is the diameter of the non-connection point P, and accordingly, the non-connection point P is completely located within the range of the first path S1. Through the design, the invention can avoid that the non-connection point P penetrates through the first path S1 in the second direction Y, thereby ensuring the connection strength of the two layers of diaphragms through the first path S1 and ensuring the tightness of the containing space C for containing the pole pieces.

As shown in fig. 5, based on the design with the non-connection points P on the first path S1, in an embodiment of the present invention, the first path S1 may have at least two non-connection points P, and the at least two non-connection points P are spaced along the first direction X. Through the design, the disassembly of the two layers of diaphragms is more convenient and labor-saving, and the pole pieces are further convenient to separate and recycle.

As shown in fig. 5, based on the design with the non-connection point P on the first path S1, in an embodiment of the present invention, the non-connection point P may be at least located at the connection between the first path S1 and the second path S2. In some embodiments, the unconnected point P may also be located in the area where the first path S1 is connected to the second path S2, which is not limited in this embodiment.

Referring to fig. 6, a schematic diagram of the cell in an expanded state of a battery capable of embodying the principles of the present invention is representatively illustrated in fig. 6.

As shown in fig. 6, in an embodiment of the present invention, for the positive electrode sheet separator material tape B, the first path S1 of the connection position of the two separator layers may also have an unconnected point P, where the two separator layers are unconnected.

Referring to fig. 7, a schematic diagram of the cell in an expanded state of a battery capable of embodying the principles of the present invention is representatively illustrated in fig. 7.

As shown in fig. 7, in an embodiment of the present invention, for the positive and negative electrode sheet separator material strips a, at least two gaps G where the two separator layers are not connected may be provided on the first path S1 corresponding to the tab side. Wherein, in the second direction Y, the width of the gap G may be equal to the width of the first path S1, so that the receiving space C communicates with the outside via the gap G. On the basis, at least two gaps G correspond to at least two lugs one by one, and the lugs penetrate through the gaps G and extend out of the accommodating space C. Through the design, the air exhaust of the accommodating space C can be realized by utilizing the gap G, so that the change of the distance between the two layers of diaphragms caused by inflation in the two layers of diaphragms is prevented, the transmission of lithium ions is further influenced, and the electrical performance of the battery is ensured.

As shown in fig. 7, based on the design of the first path S1 with the gap G, in an embodiment of the present invention, along the first direction X, the length L of the gap G may be 3mm to 50mm, for example, 3mm, 5mm, 10mm, 20mm, 30mm, 50mm, etc., and may be specifically flexibly adjusted according to the widths of the tabs of the pole pieces with different specifications along the first direction X.

Referring to fig. 8, a schematic diagram of the cell in an expanded state of a battery capable of embodying the principles of the present invention is representatively illustrated in fig. 8.

As shown in fig. 8, in an embodiment of the present invention, for the positive electrode sheet separator material tape B, at least two gaps G where two separator layers are not connected may be provided on the first path S1 corresponding to the side of the positive electrode tab 1311. Wherein, in the second direction Y, the width of the gap G may be equal to the width of the first path S1, so that the receiving space C communicates with the outside via the gap G. On this basis, at least two gaps G correspond to at least two positive electrode tabs 1311 one by one, and the positive electrode tabs 1311 extend out of the accommodation space C through the gaps G.

Referring to fig. 9, a schematic diagram of the cell in an expanded state of a battery capable of embodying the principles of the present invention is representatively illustrated in fig. 9.

As shown in fig. 9, in an embodiment of the present invention, for the positive electrode sheet separator material tape B, the connection position may have two second paths S2 at positions between the adjacent two electrode sheets, and the two second paths S2 between the adjacent two electrode sheets are aligned along the first direction X. Through the design, the battery cell can be manufactured by the positive plate diaphragm material belt B in a winding mode conveniently.

In some embodiments of the present invention, as shown in fig. 1, 3, and 5 to 8, when the battery cell includes at least two pole piece structures spaced apart along the first direction X, there may be only one second path S2 between adjacent two pole piece structures. In some embodiments, as shown in fig. 9, when the battery cell includes at least two pole piece structures arranged at intervals along the first direction X, two second paths S2 may also be disposed between two adjacent pole piece structures, and the two second paths S2 are arranged at intervals along the first direction X.

Referring to fig. 10 and 11, a schematic diagram of the cell in an expanded state of a battery capable of embodying the principles of the present invention is representatively illustrated in fig. 10; fig. 11 shows a schematic cross-sectional view of fig. 10.

As shown in fig. 10 and 11, in an embodiment of the present invention, the above-mentioned pole piece structure may include a positive pole piece 131, a negative pole piece 132 and an intermediate separator 140, where the positive pole piece 131 and the negative pole piece 132 are respectively located on two side surfaces of the intermediate separator 140, the positive pole piece 131 has a plurality of positive pole lugs 1311 arranged at intervals along the first direction X, the negative pole piece 132 has a plurality of negative pole lugs 1321 arranged at intervals along the first direction X, and the positive pole piece 131, the negative pole piece 132, the two-layer separator and the intermediate separator 140 form a positive and negative pole piece intermediate separator material belt E. The middle membrane 140 may also be regarded as a body of the pole piece structure, and accordingly, the middle membrane 140 is not connected to the first membrane 111 and the second membrane 121 at the connection position. On the basis, the separator material belt E between the positive and negative electrode plates can form an electric core through self winding.

As shown in fig. 10, in an embodiment of the present invention, the positive electrode tab 1311 and the negative electrode tab 1321 may protrude in opposite directions from opposite side edges of the positive electrode tab 131 and the negative electrode tab 132, respectively, in the second direction Y.

It should be noted herein that the batteries shown in the drawings and described in this specification are only a few examples of the wide variety of batteries that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any details or any components of the battery shown in the drawings or described in this specification.

Based on the above detailed description of several exemplary embodiments of the battery proposed by the present invention, several exemplary embodiments of the processing apparatus of the battery proposed by the present invention will be described below.

Referring to fig. 12, a system diagram of a battery processing apparatus according to the present invention is representatively illustrated. In this exemplary embodiment, the processing apparatus of the battery proposed by the present invention is described taking as an example the processing of the battery cell applied to the vehicle-mounted battery, for example, but not limited to, the processing of the battery cell of the battery proposed by the present invention. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the embodiments described below in order to adapt the relevant designs of the present invention to the processing of the cells of other types of batteries, and such changes remain within the principles of the battery processing apparatus set forth herein.

As shown in fig. 12, in an embodiment of the present invention, the battery includes two unreeling mechanisms, a first feeding mechanism, two hot-press rollers 400, and a hot-press member. Referring to fig. 13 in conjunction, a schematic perspective view of a thermo roll 400 of the battery processing apparatus shown in fig. 12 is representatively illustrated in fig. 13. The structure, connection manner and functional relationship of the main components of the battery processing apparatus according to the present invention will be described in detail below with reference to the above-mentioned drawings.

As shown in fig. 12 and 13, in an embodiment of the present invention, the two unreeling mechanisms are a first unreeling mechanism 210 and a second unreeling mechanism 220, respectively, the first unreeling mechanism 210 is used for unreeling the first membrane roll 110, the second unreeling mechanism 220 is used for unreeling the second membrane roll 120, and the first membrane 111 after unreeling the first membrane roll 110 extends along the first direction X. The first feeding mechanism is located at one side of the first unreeling mechanism 210 along the first direction X, and the first feeding mechanism is used for placing the pole piece on the first membrane 111 after unreeling. The second unreeling mechanism 220 is located at a side of the first feeding mechanism facing away from the first unreeling mechanism 210, and the second membrane 121 of the second membrane material roll 120 after unreeling extends to above the pole piece. The two hot pressing rollers 400 and the hot pressing member are respectively located at one side of the second unreeling mechanism 220 facing away from the first unreeling mechanism 210. Wherein the two thermo roll 400 are arranged opposite to each other up and down, and the axis of the thermo roll 400 is parallel to the first membrane 111 and perpendicular to the first direction X. The periphery of each hot pressing roller 400 is provided with two first hot pressing strips 410, the first hot pressing strips 410 are in a ring shape, and the two first hot pressing strips 410 are respectively positioned at two side edges of the hot pressing roller 400 in the second direction Y. The hot pressing piece is in a strip shape extending along the second direction Y. Accordingly, the two hot pressing rollers 400 are used for hot pressing the two-layer separator to enable the connection position of the two-layer separator to be arranged along the first path S1, the hot pressing member is used for hot pressing the two-layer separator to enable the connection position of the two-layer separator to be arranged along the second path S2, the two first paths S1 are respectively located at two edges of the separator in the second direction Y, the first paths S1 extend along the first direction X, and the second paths S2 are located between two adjacent pole pieces and extend along the second direction Y. In other words, the connection position of the two-layered separator formed by the hot pressing of the two hot pressing rollers 400 to connect the two-layered separator includes two first paths S1 and at least one second path S2. Accordingly, the battery according to the present invention can be manufactured by using the battery manufacturing apparatus according to the present invention, and the battery according to the present invention can be manufactured by using the positive and negative electrode sheet separator material strips a and the positive electrode sheet separator material strips B.

As shown in fig. 12, in an embodiment of the present invention, the processing apparatus for a battery according to the present invention may further include a first positioning mechanism 510, where the first positioning mechanism 510 is disposed corresponding to the first feeding mechanism, and the first positioning mechanism 510 is used to position the pole piece on the first membrane 111. For example, the first positioning mechanism 510 may be an optical positioning device such as, but not limited to, a CCD-based optical sensor. Through the design, the invention can utilize the first positioning mechanism 510 to sense whether the pole piece is fed in place on the first membrane 111 or not, and feed back the pole piece to the first feeding mechanism to correspondingly adjust the feeding position of the pole piece, thereby ensuring the accuracy of the feeding position of the pole piece on the first membrane 111.

As shown in fig. 12, in an embodiment of the present invention, the processing apparatus for a battery according to the present invention may further include a second feeding mechanism 320, where the second feeding mechanism 320 is located between the first feeding mechanism and the first unreeling mechanism 210, and the second feeding mechanism 320 is used to transfer an adhesive to the upper surface of the first membrane 111, so that the pole piece is adhesively connected to the first membrane 111 via the adhesive. Through the design, the pre-connection between the pole piece and the first membrane 111 can be realized by using the adhesive conveyed by the second feeding mechanism 320, so that the connection stability of the pole piece and the first membrane 111 in the subsequent station of processing equipment is improved, and the product yield is improved. It should be noted that, after the hot pressing of the hot pressing roller 400, the adhesive adhered between the pole piece and the first membrane 111 may be partially or completely disabled, and at this time, the pole piece may be positioned between the two layers of membranes via the connection position including the first path S1 and the second path S2.

As shown in fig. 12, the battery-based processing apparatus includes a design of the second feeding mechanism 320, and in an embodiment of the present invention, the battery-based processing apparatus may further include a second positioning mechanism 520, where the second positioning mechanism 520 is disposed corresponding to the second feeding mechanism 320, and the second positioning mechanism 520 is used to position the adhesive on the first separator 111. For example, the second positioning mechanism 520 may be an optical positioning device such as, but not limited to, a CCD-based optical sensor. Through the design, the invention can utilize the second positioning mechanism 520 to sense whether the adhesive is fed in place on the first membrane 111, and feed the adhesive back to the second feeding mechanism 320 to correspondingly adjust the feeding position of the adhesive, thereby ensuring the accuracy of the feeding position of the adhesive on the first membrane 111, and further ensuring that the adhesive is not conveyed to the area of the first membrane 111 without connecting the pole pieces to cause adhesive waste.

In an embodiment of the present invention, the processing apparatus for a battery according to the present invention may further include a traction mechanism disposed on a side of the two hot-press rollers 400 facing away from the unreeling mechanism, and the traction mechanism is used for traction of two separator layers thermally pressed together by the hot-press rollers 400 and encapsulated with the pole pieces, for example, the traction mechanism may be used for traction of the positive and negative pole piece separator material strips a or the positive pole piece separator material strips B.

As shown in fig. 13, in an embodiment of the present invention, a second heat and pressure bar 420 may be further disposed at the periphery of each heat and pressure roller 400, and the second heat and pressure bar 420 is connected between the two first heat and pressure bars 410, and the extending direction of the second heat and pressure bar 420 is parallel to the second direction Y (i.e. the direction in which the axis of the heat and pressure roller 400 is located). Accordingly, the second heat pressing bar 420 may be used as the heat pressing member, so that the second heat pressing bar 420 on the two heat pressing rollers 400 can form the second path S2 of the connection position on the two layers of diaphragms through the heat pressing of the two heat pressing rollers 400.

As shown in fig. 13, based on the design that the heat and pressure roller 400 is provided with the second heat and pressure bars 420, in an embodiment of the present invention, the periphery of the heat and pressure roller 400 may be provided with at least two second heat and pressure bars 420, and the at least two second heat and pressure bars 420 are arranged at intervals along the circumferential direction of the heat and pressure roller 400. Accordingly, the non-connected region formed by the two adjacent second heat press strips 420 after being hot pressed on the two layers of diaphragms corresponds to an accommodating space C between the two layers of diaphragms, and the accommodating space C can be used for accommodating a pole piece with one tab, namely, corresponds to the structure of the battery cell shown in fig. 1. In some embodiments, to implement a cell structure corresponding to that shown in fig. 1, the thermo-compression roller 400 may not be provided with the second thermo-compression strip 420, and an auxiliary thermo-compression mechanism 600 is disposed on a side of the second unreeling mechanism 220 facing away from the first unreeling mechanism 210, where the auxiliary thermo-compression mechanism 600 is disposed separately from the two thermo-compression rollers 400, and the auxiliary thermo-compression mechanism 600 includes the thermo-compression strip described above. Accordingly, the battery processing apparatus according to the present invention can also utilize the auxiliary hot pressing mechanism 600 to realize the second path S2 in the structure corresponding to the battery cell shown in fig. 1, which is not limited to the embodiment.

Based on the design that the heat press roller 400 is provided with the second heat press bar 420, in an embodiment of the present invention, the connection between the first heat press bar 410 and the second heat press bar 420 may have an R-angle structure, and the corresponding circle radius of the R-angle structure is 0.3 mm-3 mm, for example, 0.3mm, 0.5mm, 1mm, 2mm, 3mm, etc. Through the design, the stress condition of the connection part of the first path S1 and the second path S2 formed by hot pressing the first hot pressing strip 410 and the second hot pressing strip 420 on the diaphragm can be improved by utilizing the R-angle structure, so that stress concentration at the connection part of the first path S1 and the second path S2 is avoided, and the connection strength of two layers of diaphragms is further improved. On the basis, the invention can avoid the problem that the effect of improving the stress condition is not obvious enough due to the fact that the corresponding radius of the R-angle structure is too small, and can avoid the problem that the containing space C for containing the pole piece is excessively occupied due to the fact that the corresponding radius of the R-angle structure is too large. In some embodiments, the radius of the R corner structure at the connection between the first heat pressing bar 410 and the second heat pressing bar 420 may be less than 0.3mm, or may be greater than 3mm, such as 0.29mm, 3.05mm, and the like, which is not limited to this embodiment.

As shown in fig. 12, in an embodiment of the present invention, the first feeding mechanism may be an adsorption mechanical arm 311, where the adsorption mechanical arm 311 is used to alternately and alternately transfer the positive electrode sheet 131 and the negative electrode sheet 132 onto the first membrane 111, the positive electrode sheet 131 has a positive electrode tab 1311, and the negative electrode sheet 132 has a negative electrode tab 1321. Therefore, the battery processing equipment provided by the invention can enable the two layers of diaphragms to be connected together with the pole piece after hot pressing to form the positive and negative pole piece diaphragm material belt A, for example, the structure of the positive and negative pole piece diaphragm material belt A corresponds to the battery core shown in FIG. 1. On this basis, the thermo roll 400 may include the second thermo roll 420, or the thermo roll 400 may not include the second thermo roll 420 and the processing apparatus may include the auxiliary thermo roll mechanism 600.

Based on the design that the first feeding mechanism is the adsorption mechanical arm 311, in an embodiment of the present invention, the processing device for a battery provided by the present invention may further include a lamination mechanism, where the lamination mechanism is located on a side of the two hot-pressing rollers 400 facing away from the unreeling mechanism, and the lamination mechanism is used for folding the positive and negative electrode sheet membrane material strips a in a "Z" shape manner to form a battery cell, for example, a battery cell structure shown in fig. 2.

As shown in fig. 12, in an embodiment of the present invention, the processing apparatus for a battery according to the present invention may further include a limiting roller 800, where the limiting roller 800 is located between the thermo roll 400 and the second unreeling mechanism 220, and the limiting roller 800 is used to change the extending direction of the unreeled second separator 121 to the first direction X.

Referring to fig. 14 and 15, a system diagram of a battery processing apparatus capable of embodying the principles of the present invention in another exemplary embodiment is representatively illustrated in fig. 14; fig. 15 representatively illustrates a schematic perspective view of a hot press roller 400 of the battery processing apparatus shown in fig. 14.

In the embodiment of the present invention, as shown in fig. 14 and 15, the first feeding mechanism may also be a third unreeling mechanism 312, where the third unreeling mechanism 312 is used for unreeling the positive plate material roll, and the positive plate 131 after unreeling the positive plate material roll is transferred onto the first membrane 111, where the positive plate 131 has a plurality of positive lugs 1311 arranged at intervals, so that the two layers of membranes are hot-pressed and connected to form a positive plate membrane material strip B together with the positive plate 131, for example, the structure of the positive plate membrane material strip B corresponding to the battery core shown in fig. 3. On this basis, the hot press roller 400 includes only the first hot press bar 410, and the processing apparatus includes an auxiliary hot press mechanism 600, the auxiliary hot press mechanism 600 being located at a side of the second unreeling mechanism 220 facing away from the first unreeling mechanism 210, the auxiliary hot press mechanism 600 being disposed relatively independently from the two hot press rollers 400 and including the hot press unit described above.

As shown in fig. 14, based on the design of the first feeding mechanism for the third unreeling mechanism 312, in an embodiment of the present invention, the processing apparatus for a battery provided by the present invention may further include a cutter mechanism 700, where the cutter mechanism 700 is located between the hot pressing member and the third unreeling mechanism 312, and the cutter mechanism 700 is used for cutting the positive plate 131 transferred onto the first separator 111 into a plurality of positive plate units, each positive plate unit after cutting has a plurality of positive lugs 1311, and the second path S2 of the connection position of the two separator layers is located between two adjacent positive plate units.

Based on the design of the first feeding mechanism for the third unreeling mechanism 312, in an embodiment of the invention, the processing apparatus for a battery provided by the invention may further include a third feeding mechanism and a reeling mechanism, the third feeding mechanism is located at one side of the two hot pressing rollers 400 facing away from the unreeling mechanism, the third feeding mechanism is used for conveying the plurality of negative electrode sheets 132 to the upper surface of the positive electrode sheet separator material belt B at intervals, and each negative electrode sheet 132 has a negative electrode tab 1321. The winding mechanism is located at one side of the third feeding mechanism facing away from the two hot-pressing rollers 400, and is used for winding the positive plate diaphragm material belt B and the plurality of negative plates 132 to form a battery cell, for example, the battery cell structure shown in fig. 4.

Referring to fig. 16, a schematic perspective view of a thermo roll 400 of a battery processing apparatus capable of embodying the principles of the present invention is representatively illustrated in fig. 16.

As shown in fig. 16, in an embodiment of the present invention, the thermo roll 400 has a first thermo-compression strip 410 and a second thermo-compression strip 420, and the first thermo-compression strip 410 may have a hole 411 thereon, so that a first path S1 of a connection position of two layers of diaphragms has an unconnected point P corresponding to the hole 411, where the two layers of diaphragms are unconnected, for example, corresponding to the cell structure shown in fig. 5.

Based on the design that the first heat pressing strip 410 has the hole 411, in an embodiment of the present invention, the heat pressing roller 400 may be provided with a blowing mechanism, which is connected to the hole 411, and the blowing mechanism is used for blowing air to the two layers of diaphragms through the hole 411, so that the diaphragms after being heat pressed are separated from the heat pressing roller 400.

Referring to fig. 17, there is representatively illustrated a schematic perspective view of a hot press roller 400 of a battery processing apparatus capable of embodying principles of the present invention in fig. 17.

As shown in fig. 17, in an embodiment of the present invention, the heat and pressure roller 400 has only the first heat and pressure bar 410, and the first heat and pressure bar 410 may have a hole 411 thereon, for example, corresponding to the cell structure shown in fig. 6.

Referring to fig. 18, a schematic perspective view of a thermo roll 400 of a battery processing apparatus capable of embodying the principles of the present invention is representatively illustrated in fig. 18.

As shown in fig. 18, in an embodiment of the present invention, the thermo roll 400 has a first thermo-compression strip 410 and a second thermo-compression strip 420, and the first thermo-compression strip 410 has a non-thermo-compression area 412, so that a first path S1 of a connection position of two layers of diaphragms has a gap G corresponding to the non-thermo-compression area 412, the two layers of diaphragms are not connected at the gap G, the gap G corresponds to a tab of a pole piece, and the tab extends out of the two layers of diaphragms through the gap G, for example, corresponds to a part of the structure of the battery cell shown in fig. 7.

Referring to fig. 19, a schematic perspective view of a thermo roll 400 of a battery processing apparatus capable of embodying the principles of the present invention is representatively illustrated in fig. 19.

As shown in fig. 19, in an embodiment of the present invention, the thermo roll 400 has only the first thermo strip 410, and the first thermo strip 410 has a non-thermo strip 412 thereon, for example, a part of the structure corresponding to the battery cell shown in fig. 8.

In the embodiment shown in fig. 18 or 19, the first heat pressing bar 410 is configured in a multi-stage configuration with a gap along the circumferential direction of the heat pressing roller 400, and the non-heat pressing area 412 is formed by the gap between two adjacent stages. In some embodiments, when the first heat-pressing strip 410 is designed to be a closed loop shape that is continuous along the circumferential direction of the heat-pressing roller 400, the non-heat-pressing area 412 may be formed by providing a blocking member on the surface of the first heat-pressing strip 410 to block the heat of the heat-pressing strip, which is not limited to the above embodiments.

Based on the above detailed description of several exemplary embodiments of the battery processing apparatus according to the present invention, the processing process according to the present invention will be described below.

When the battery core of the battery is processed by the battery processing equipment provided by the invention, the battery processing equipment at least comprises the following steps:

pulling one end of the two layers of diaphragms by utilizing a traction mechanism to enable the first unreeling mechanism 210 and the second unreeling mechanism 220 to unreel the first diaphragm material roll 110 and the second diaphragm material roll 120 along a first direction X respectively;

opening the second positioning mechanism 520 and the second feeding mechanism 320, the second feeding mechanism 320 delivering the adhesive to the first membrane 111;

opening the first positioning mechanism 510 and the first feeding mechanism, wherein the first feeding mechanism conveys the electrode sheet to the first membrane 111 (for example, alternately conveys the positive electrode sheet 131 and the negative electrode sheet 132, and for example conveys the positive electrode sheet 131 which is unreeled by the positive electrode sheet material belt), and the adhesive adheres to the electrode sheet and the first membrane 111;

the hot press roller 400 reaches a hot press station, the angle is adjusted, the hot press roller 400 begins to perform hot press after being preheated to a preset temperature, and the traction mechanism and the unreeling mechanism work cooperatively with the hot press roller 400;

the hot roller 400 rotates by a predetermined angle and then sprays air (for example, air is sprayed through the hole 411, or air can be directly sprayed by using an air blowing mechanism).

Based on the above processing technology, in some embodiments, the separator and the pole piece after the hot pressing is finished may be further processed (for example, the battery core is prepared by adopting a lamination technology or a winding technology) or rolled and stored (that is, the separator material belt A of the positive pole piece or the separator material belt B of the negative pole piece is rolled for standby).

Based on the above-described processing process, in some embodiments, when the processing apparatus shown in fig. 14 is employed, the positive electrode sheet 131 after unreeling may be cut to a predetermined length by the cutter mechanism 700.

Referring to fig. 20, a system diagram of a battery processing apparatus capable of embodying the principles of the present invention in another exemplary embodiment is representatively illustrated in fig. 20.

As shown in fig. 20, in an embodiment of the present invention, the processing apparatus for a battery according to the present invention may further include a fourth unreeling mechanism 313 and a fifth unreeling mechanism 230 on the basis of the embodiment shown in fig. 12 to 19, and may be applied to at least the processing and manufacturing of the battery cells of the battery shown in fig. 10 and 11. Specifically, the processing apparatus of the battery may include five unreeling mechanisms, namely, a first unreeling mechanism 210 for unreeling the first separator 111, a second unreeling mechanism 220 for unreeling the second separator 121, a fifth unreeling mechanism 230 for unreeling the intermediate separator 140, a third unreeling mechanism 312 for unreeling the positive electrode sheet 131, and a fourth unreeling mechanism 313 for unreeling the negative electrode sheet 132. On the basis, the hot-pressing roller 400 and the hot-pressing piece are used for hot-pressing and welding the first diaphragm 111, the second diaphragm 121 and the middle diaphragm 140 together, so that the three diaphragms are hot-welded and connected together at the connecting position with the first path S1 and the second path S2, and the positive and negative pole piece middle diaphragm material belt E is formed. According to the battery manufacturing equipment provided by the invention, the battery core can be directly obtained by winding the battery core in the subsequent process, so that the storage and transportation of the battery core after the middle-interval membrane material belt E is manufactured are facilitated, the storage and transportation of the positive plate material belt and the negative plate (or the storage and transportation of the negative plate material belt and the positive plate respectively) are not needed, the process flow is simplified, and the manufacturing cost is reduced.

It should be noted herein that the processing equipment of the battery shown in the drawings and described in the present specification is only a few examples of the wide variety of processing equipment that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any details or any components of the battery processing apparatus shown in the drawings or described in the present specification.

Based on the above detailed description of several exemplary embodiments of the processing apparatus for a battery according to the present invention, an exemplary embodiment of the manufacturing process for a battery according to the present invention will be described below.

In an embodiment of the present invention, a manufacturing process of a battery according to the present invention includes:

providing a processing apparatus of a battery according to the present invention and described in detail in the above embodiments;

the traction mechanism is utilized to traction one end of each of the two layers of diaphragms to enable the first unreeling mechanism and the second unreeling mechanism to unreel towards the hot bundling working position respectively;

the pole piece structure is conveyed between the two layers of diaphragms by utilizing a first feeding mechanism; and

and (3) adjusting the position of a hot-pressing roller of the hot-rolling station, and hot-pressing the two layers of diaphragms by using the hot-pressing roller and a hot-pressing piece. In summary, the two layers of diaphragms are connected by hot melting at the connection position, the connection position comprises a first path S1 and a second path S2, the paths of the first path S1 and the second path S2 are continuous lines, the first path S1 extends along a first direction X, the two first paths are respectively positioned at two edges of the diaphragm in a second direction Y, the second path extends along the second direction Y and is connected between the two first paths, at least two second paths are arranged at intervals along the first direction X, and the first direction X and the second direction Y are respectively the length direction and the width direction of the diaphragm. The two layers of diaphragms are separated into at least one containing space C by a connecting position, each containing space C is internally provided with a pole piece structure, and at the connecting position of the two layers of diaphragms, the body of the pole piece structure has no connecting relation with the diaphragms, and the pole lugs of the pole piece structure extend out of the containing space C. Through the design, the pole piece structure can be positioned in the second direction Y by utilizing the first path, and meanwhile, the pole piece structure is positioned in the first direction X by utilizing the second path, so that the pole piece structure is prevented from generating dislocation in the lamination or winding process, and the pole piece structure is prevented from falling out from the accommodating space C along the second direction Y. Furthermore, as the second path is connected with the first path and adopts a continuous line shape, the invention can avoid the loss of electrolyte and other substances in the containing space C containing the pole piece structures and avoid the short circuit between adjacent pole piece structures to cause the short circuit of the battery core.

Exemplary embodiments of a battery, a battery processing apparatus, and a battery manufacturing process according to the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the invention has been described in terms of various specific embodiments, a battery processing apparatus, and a battery manufacturing process, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims

1. A battery, characterized in that:

the battery comprises a battery core, wherein the battery core comprises two layers of diaphragms, the two layers of diaphragms are mutually connected in a hot melting mode at a connecting position, the connecting position is arranged along two first paths and at least two second paths, the first paths and the second paths are continuous linear, the first paths extend along a first direction, the first direction is the length direction of the diaphragms, the two first paths are respectively positioned at two edges of the diaphragms in a second direction, the second direction is perpendicular to the first direction, the second paths extend along the second direction and are connected between the two first paths, and at least two second paths are arranged at intervals along the first direction;

the two layers of diaphragms are separated into at least one containing space by the connecting position, each containing space is internally provided with a pole piece structure, the connecting position of the two layers of diaphragms is provided with a body of the pole piece structure, the body of the pole piece structure is not connected with the diaphragms, and the pole lugs of the pole piece structure extend out of the containing space.

2. The battery according to claim 1, wherein:

Along the first direction, the edge of the pole piece structure and the corresponding second path have a distance of 0.2 mm-3 mm; and/or

And along the second direction, the edge of the pole piece structure and the corresponding first path have a spacing of 0.2-3 mm.

3. The battery according to claim 1, wherein:

the width of the first path along the second direction is 0.2 mm-2 mm; and/or

The width of the second path along the first direction is 0.2 mm-0.6 mm.

4. The battery of claim 1, wherein the first path has an unconnected point on the first path at which two layers of the separator are unconnected, the unconnected point being located at least at the junction of the first path and the second path.

5. The battery according to claim 1, wherein the first path corresponding to one side of the tab has at least two gaps, at which two layers of the separator are not connected, and a width of the gaps is equal to a width of the first path in the second direction so that the accommodation space communicates with the outside via the gaps; at least two gaps correspond to at least two lugs one by one, and the lugs penetrate through the gaps and extend out of the accommodating space.

6. The battery of any one of claims 1-5, wherein the cell comprises at least two of the pole piece structures, the at least two pole piece structures being spaced apart along the first direction; wherein:

a second path is arranged between two adjacent pole piece structures; or alternatively

Two second paths are arranged between two adjacent pole piece structures, and the two second paths are arranged at intervals along the first direction.

7. The battery according to any one of claims 1 to 5, wherein the battery cell comprises positive electrode sheets and negative electrode sheets, each positive electrode sheet is provided with a positive electrode tab, each negative electrode sheet is provided with a negative electrode tab, the positive electrode sheets and the negative electrode sheets are of the electrode sheet structure, the positive electrode sheets and the negative electrode sheets are alternately arranged along the first direction, and the positive electrode sheets and the negative electrode sheets and two layers of the separator form a positive electrode sheet and a negative electrode sheet separator material belt; the positive and negative plate diaphragm material belts are folded in a Z-shaped mode to form the battery cell.

8. The battery according to any one of claims 1 to 5, wherein the battery cell comprises a positive plate and at least one negative plate, the positive plate is provided with at least two positive lugs, the at least two positive lugs are arranged at intervals along the first direction, each negative plate is provided with one negative lug, the positive plate is of the pole plate structure, and the positive plate and two layers of the diaphragms form a positive plate diaphragm material belt; the positive plate diaphragm material belt and at least one negative plate are wound to form the battery cell.

9. The battery of claim 8, wherein:

the battery cell comprises a negative electrode plate, and the positive electrode plate diaphragm material belt and the negative electrode plate are wound to form the battery cell; or alternatively

The battery cell comprises at least two negative plates, and the positive plate diaphragm material belt and at least two negative plate laminates form the battery cell.

10. The battery according to any one of claims 1 to 5, wherein the electrode sheet structure comprises a positive electrode sheet, a negative electrode sheet and an intermediate separator, the positive electrode sheet and the negative electrode sheet are respectively positioned on two side surfaces of the intermediate separator, the positive electrode sheet has a plurality of positive electrode tabs arranged at intervals along the first direction, the negative electrode sheet has a plurality of negative electrode tabs arranged at intervals along the first direction, and the positive electrode sheet, the negative electrode sheet, the two layers of separators and the intermediate separator form a positive electrode sheet intermediate separator material belt; and the separator material belt between the positive and negative plates is wound to form the battery cell.

11. A battery processing device, characterized in that:

the battery processing equipment comprises two unreeling mechanisms, a first feeding mechanism, two hot-pressing rollers and a hot-pressing piece;

The two unreeling mechanisms are a first unreeling mechanism and a second unreeling mechanism respectively, the first unreeling mechanism and the second unreeling mechanism are used for unreeling a first diaphragm material roll and a second diaphragm material roll respectively, and a first diaphragm after unreeling the first diaphragm material roll extends along a first direction;

the first feeding mechanism is positioned at one side of the first unreeling mechanism along the first direction and is used for placing the pole piece structure on the unreeled first diaphragm, the second unreeling mechanism is positioned at one side of the first feeding mechanism, which is opposite to the first unreeling mechanism, and the second diaphragm after unreeling the second diaphragm material extends to the upper part of the pole piece structure;

the two hot-pressing rollers and the hot-pressing piece are respectively positioned at one side of the second unreeling mechanism, which is opposite to the first unreeling mechanism, the two hot-pressing rollers are arranged up and down, the axis of each hot-pressing roller is parallel to the first diaphragm and perpendicular to the first direction, two first hot-pressing strips are arranged on the periphery of each hot-pressing roller, each first hot-pressing strip is in a circular shape, the two first hot-pressing strips are respectively positioned at the two side edges of each hot-pressing roller in the second direction, and each hot-pressing piece is in a strip shape extending along the second direction;

The hot pressing rollers are used for hot pressing the two layers of diaphragms to enable the connection positions of the two layers of diaphragms to be arranged along a first path, the hot pressing members are used for hot pressing the two layers of diaphragms to enable the connection positions of the two layers of diaphragms to be arranged along a second path, the two first paths are respectively located at two edges of the diaphragms in a second direction, the first paths extend along the first direction, the second paths extend along the second direction, and the second paths are located at two sides of the pole piece structure along the first direction.

12. The battery processing apparatus according to claim 11, wherein the first heat press bar has a hole therein such that the first path of the connection position of the two layers of the separator has an unconnected point corresponding to the hole, at which the two layers of the separator are unconnected.

13. The battery processing apparatus according to claim 11, wherein the first heat press bar has a non-heat pressing area thereon, such that a gap corresponding to the non-heat pressing area is provided on the first path of the connection position of the two layers of the separator, the two layers of the separator are not connected at the gap, the gap corresponds to a tab of the pole piece, and the tab protrudes from the two layers of the separator through the gap.

14. The battery processing apparatus according to claim 11, wherein a second heat pressing bar is further provided at a periphery of each of the heat pressing rollers, the second heat pressing bar being connected between the two first heat pressing bars and extending in a direction parallel to the second direction, the second heat pressing bar being the heat pressing member.

15. The battery processing apparatus according to claim 11, further comprising an auxiliary hot press mechanism located on a side of the second unreeling mechanism facing away from the first unreeling mechanism, the auxiliary hot press mechanism being disposed relatively independently from the two hot press rollers and including the hot press member.

16. A process for manufacturing a battery, comprising:

providing a processing apparatus for a battery according to any one of claims 11 to 15;

and (3) adjusting the position of a hot-pressing roller of the hot-rolling station, and hot-pressing the two layers of diaphragms by using the hot-pressing roller and a hot-pressing piece.