Batteries and electronic devices

Abstract

The embodiment of the present application provides a battery and an electronic device to solve the problem that the side sealing edges between the battery cells need to be folded. The battery includes: a first core, a second core and a packaging film; the first core includes a first body, and the second core includes a second body; the packaging film includes a first film body portion and a second film body portion that are arranged opposite to each other, the first body and the second body are respectively sandwiched between the first film body portion and the second film body portion, the first body and the second body are arranged at intervals, and the opposite sides of the first body and the second body form a spacing area, the first film body portion and the second film body portion are sealed and connected at the portion located in the spacing area, and the edge portions of the first film body portion and the second film body portion are sealed and connected to form a first sealing area that seals the first body and a second sealing area that seals the second body.

Description

Technical Field

[0001] The present application relates to the technical field of battery design, and in particular to a battery and an electronic device. Background Art

[0002] As electronic devices continue to innovate, the battery technology of electronic devices has also made great progress. At present, some manufacturers have adopted the more advanced "dual-cell" battery power supply solution. Figure 1 The "dual-cell" battery in the related art is composed of a first cell 210 and a second cell 220 connected together. According to the process requirements, the side sealing edge of the first cell 210 close to the second cell 220 needs to be folded to form a first folded corner 211; the side sealing edge of the second cell 220 close to the first cell 210 needs to be folded to form a second folded corner 221. The first folded corner 211 and the second folded corner 221 are easy to interfere with the battery protection circuit board. Utility Model Content

[0003] The embodiments of the present application provide a battery and an electronic device to solve the problems existing in the background technology.

[0004] The battery provided in the embodiment of the present application includes: a first core, a second core and a packaging film; the first core includes a first body, and the second core includes a second body; the packaging film includes a first film body portion and a second film body portion arranged opposite to each other, the first body and the second body are respectively sandwiched between the first film body portion and the second film body portion, the first body and the second body are spaced apart, the opposite sides of the first body and the second body form a spacing area, the first film body portion and the second film body portion are sealed and connected at the parts located in the spacing area, and the edge parts of the first film body portion and the second film body portion are sealed and connected to form a first sealing area sealing the first body and a second sealing area sealing the second body.

[0005] Optionally, the first membrane body portion is provided with a first groove and a second groove which are spaced apart from each other, the first body is provided in the first groove, the second body is provided in the second groove, and the second membrane body portion covers notches of the first groove and the second groove.

[0006] Optionally, a first sealing edge is provided on one side edge of the packaging film; the first core also includes a first pole ear and a second pole ear extending from the first body, and the first pole ear and the second pole ear extend to the outside of the first sealing area through the first sealing edge; the second core also includes a third pole ear and a fourth pole ear extending from the second body, and the third pole ear and the fourth pole ear extend to the outside of the second sealing area through the first sealing edge.

[0007] Optionally, the battery further includes a circuit board, and the circuit board is arranged on a side of the first sealing edge away from the first body and the second body.

[0008] Optionally, the circuit board extends in a direction parallel to the first sealing edge, and one end of the circuit board is opposite to one end of the first sealing edge, and the other end of the circuit board is opposite to the other end of the first sealing edge.

[0009] Optionally, the circuit board is a rigid circuit board.

[0010] Optionally, the packaging film is an integrated structure, and the packaging film further comprises a bending portion, wherein the bending portion respectively connects the first film body portion and the second film body portion, and the bending portion is located at an edge of the packaging film away from the first sealing edge.

[0011] Optionally, the packaging film further includes a second sealing edge and a third sealing edge which are separated from each other, the second sealing edge is respectively connected to one end of the bending portion and one end of the first sealing edge, and the third sealing edge is respectively connected to the other end of the bending portion and the other end of the first sealing edge.

[0012] Optionally, a first cutting notch is provided at a position where the first sealing edge is adjacent to the second sealing edge, and a second cutting notch is provided at a position where the first sealing edge is adjacent to the third sealing edge.

[0013] The electronic device provided in the embodiments of the present application includes any one of the batteries provided in the embodiments of the present application.

[0014] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0015] In an embodiment of the present application, the first body of the first core and the second body of the second core are encapsulated in the same encapsulation film, and the first core and the second core are sealed by a partition seal located in the interval area. Thus, compared with the related art, the side edge seal between the first battery cell and the second battery cell is omitted, so that the part between the first core and the second core does not need to be folded. In this way, the interference of the folding corners with other components can be avoided by eliminating the folding corners between the battery cells. In addition, the packaging efficiency of the battery can be improved by eliminating the folding process of folding the side edge seals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 is a schematic diagram of a battery in the related art;

[0018] Figure 2 A schematic diagram of a battery provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a packaging film provided in an embodiment of the present application, which shows a situation where the packaging film is in an unfolded state;

[0020] Figure 4 A schematic diagram of a packaging film, a first core and a second core provided in an embodiment of the present application, which shows a situation where the packaging film is in an unfolded state;

[0021] Figure 5 A schematic diagram of a packaging film, a first core and a second core provided in an embodiment of the present application, which shows a situation where the packaging film is in a folded state;

[0022] Figure 6 A schematic diagram of a packaging film, a first core and a second core provided in an embodiment of the present application, which shows the situation after the packaging film is subjected to a second sealing process;

[0023] Figure 7 A schematic diagram of a packaging film, a first core and a second core provided in an embodiment of the present application, which shows a situation after the air bag area of ​​the packaging film is cut;

[0024] Figure 8 A schematic diagram of a packaging film, a first core and a second core provided in an embodiment of the present application, which shows the situation after the corners of the packaging film are cut.

[0025] Description of reference numerals:

[0026] 100-battery; 110-first core; 111-first body; 112-first pole ear; 113-second pole ear; 120-second core; 121-second body; 122-third pole ear; 123-fourth pole ear; 130-packaging film; 131-first film body; 1311-first groove; 1312-second groove; 1313-third groove; 1314-fourth groove; 132-second film body; 133-bending portion; 141-first sealing edge; 1411-first cutting notch; 1412-second cutting notch; 142-second sealing edge; 143-third sealing edge; 144-separating sealing portion; 145-fourth sealing edge; 146-fifth sealing edge; 150-circuit board;

[0027] 210 - first battery cell; 211 - first folding angle; 220 - second battery cell; 221 - second folding angle. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article.

[0031] Furthermore, it is required that the present application be understood not only by the actual terms used but also by the meanings connoted by each term.

[0032] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0033] The present application embodiment provides a battery. Figures 2 to 8The battery 100 provided in the embodiment of the present application includes: a first core 110 , a second core 120 and a packaging film 130 .

[0034] The first core 110 includes a first body 111. Exemplarily, the first core 110 includes a positive electrode material layer, a separator paper, and a negative electrode material layer that are stacked. In addition, the positive electrode material layer, the separator paper, and the negative electrode material layer that are stacked can be wound or stacked into a specific shape. In addition, exemplarily, the first core 110 also includes a positive electrode ear and a negative electrode ear, and the first body 111 can be other structures of the first core 110 except the positive electrode ear and the negative electrode ear. Similarly, the second core 120 includes a second body 121. In addition, exemplarily, the packaging film 130 can be an aluminum-plastic film.

[0035] The packaging film 130 includes a first film body portion 131 and a second film body portion 132 that are arranged opposite to each other. The first body 111 and the second body 121 are sandwiched between the first film body portion 131 and the second film body portion 132, respectively. Exemplarily, the first film body portion 131 is located below, the first body 111 and the second body 121 are both carried by the first film body portion 131, and the second film body portion 132 is arranged above the first film body portion 131, and covers the first body 111 and the second body 121. It should be noted here that when packaging the battery, technicians in this field all adopt a solution in which the battery is sandwiched between the upper and lower layers of packaging films along its own thickness direction. Therefore, in the embodiment of the present application, the first film body portion 131 and the second film body portion 132 are arranged opposite to each other, and the first film body portion 131 and the second film body portion 132 are opposite to each other along the thickness direction of the battery 100.

[0036] Further, the first body 111 and the second body 121 are spaced apart. The opposite sides of the first body 111 and the second body 121 form a spacer area. The first film body 131 and the second film body 132 are sealed and connected at the spacer area, and the edge parts of the first film body 131 and the second film body 132 are sealed and connected to form a first sealing area that seals the first body 111 and a second sealing area that seals the second body 121.

[0037] Exemplarily, the outer contours of the first film body 131 and the second film body 132 are both rectangular, and the first body 111 and the second body 121 are distributed on the left and right, and are respectively sandwiched between the first film body 131 and the second film body 132. The first film body 131 and the second film body 132 are provided with a vertically extending separation sealing portion 144 at the position between the first body 111 and the second body 121, and the edge portions of the first film body 131 and the second film body 132 are correspondingly sealed and connected, so that the packaging film 130 forms two left and right sealing areas, and the first body 111 is sealed in the sealing area on the left, and the second body 121 is sealed in the second sealing area on the right. It should be noted that the first film body 131 and the second film body 132 can also be other shapes, such as L-shaped. When the first membrane body 131 and the second membrane body 132 have other shapes, it is also possible to seal the first body 111 in the first sealing area and the second body 121 in the second sealing area. Therefore, the embodiment of the present application does not limit the outer contour shapes of the first membrane body 131 and the second membrane body 132.

[0038] In this way, by adopting the solution provided by the embodiment of the present application, the first body 111 of the first core 110 and the second body 121 of the second core 120 are encapsulated in the same packaging film 130, and the first core 110 and the second core 120 are sealed by the partition sealing portion 144 located in the interval area. Therefore, compared with the related art, the side edge sealing between the first battery cell and the second battery cell that needs to be folded is omitted, so that the part between the first core 110 and the second core 120 does not need to be folded. In this way, the interference of the folding corners with other components can be avoided by eliminating the folding corners between the battery cells. In addition, the packaging efficiency of the battery 100 can be improved by eliminating the folding process of folding the side edge sealing.

[0039] In order to enable those skilled in the art to better understand the solution provided in the embodiment of the present application, the packaging process of the battery 100 is briefly introduced below in conjunction with the accompanying drawings.

[0040] refer to Figure 3 In some embodiments, the packaging film 130 is divided into a first film body portion 131 and a second film body portion 132, and the first film body portion 131 may be provided with a first groove 1311 and a second groove 1312 that are spaced apart. In addition, illustratively, a third groove 1313 may be provided on a side of the first groove 1311 of the first film body portion 131 away from the second groove 1312, and a fourth groove 1314 may be provided on a side of the second groove 1312 of the first film body portion 131 away from the first groove 1311.

[0041] Further, refer to Figure 4 and Figure 5, the first body 111 can be arranged in the first groove 1311, and the second body 121 can be arranged in the second groove 1312. Furthermore, the second film body 132 can be folded around the boundary between the first film body 131 and the second film body 132, so that the second film body 132 is opposite to the first film body 131, and the second film body 132 covers the notches of the first groove 1311 and the second groove 1312. In addition, the folded portion between the first film body 131 and the second film body 132 forms a bent portion 133.

[0042] Further, refer to Figure 5 Since the lower side of the packaging film 130 is sealed by the bent portion 133, in the subsequent process, the upper edge of the packaging film 130 can be sealed, and the portion of the packaging film 130 located between the first body 111 and the second body 121 can be sealed. The edge of the packaging film 130 that is away from the bent portion 133 forms a first sealed edge 141, and the portion of the packaging film 130 located between the first body 111 and the second body 121 forms a partitioning sealed portion 144.

[0043] It should be noted that, taking the packaging film 130 as an aluminum-plastic film (also called an aluminum-plastic packaging film) as an example, the aluminum-plastic film is composed of a stacked nylon layer, an aluminum layer and a polypropylene (Polypropylene, PP) layer. Among them, the nylon layer is used to ensure that the aluminum-plastic film will not deform before being packaged on the surface of the battery. The function of the aluminum layer is to prevent water from penetrating. Lithium-ion batteries are very afraid of water, and generally require the water content of the pole piece to be at the parts per million (Parts Per Million, PPM) level, so the aluminum-plastic film must be able to block the penetration of water vapor. Nylon is not waterproof and cannot play a protective role. Metal aluminum will react with oxygen in the air at room temperature to form a dense oxide film, which can prevent water vapor from penetrating and protect the interior of the battery cell. The material property of polypropylene is that it will melt at a temperature of more than 100 degrees Celsius and has viscosity. Therefore, the thermal packaging of the battery mainly relies on the polypropylene layer to melt and bond together under the action of the head heating, and then the head is removed and the temperature is reduced to solidify and bond. Therefore, when the packaging film 130 is an aluminum-plastic film, edge sealing of the aluminum-plastic film can be understood as using a sealing head to heat the to-be-sealed portions of the two opposite polypropylene layers of the packaging film, so that the to-be-sealed portions are bonded together. In addition, the specific equipment and process flow involved in the edge sealing process can be referred to the relevant technology, and will not be described in detail here.

[0044] Furthermore, electrolyte can be injected into the area where the first body 111 is located through the left side of the packaging film 130, and electrolyte can be injected into the area where the second body 121 is located through the right side of the packaging film 130. Furthermore, the left and right edges of the packaging film 130 can be sealed. The left edge of the packaging film 130 forms a fourth sealing edge 145, and the right edge of the packaging film 130 forms a fifth sealing edge 146.

[0045] Furthermore, after packaging, the battery 100 can be subjected to a formation treatment. The formation of the battery is the initialization of the battery, which is the process of activating the active material of the battery, that is, the formation of the battery is an energy conversion process. It should be noted that when the first film body 131 is provided with a third groove 1313 and a fourth groove 1314, the third groove 1313 forms a first air bag and the fourth groove 1314 forms a second air bag. During the formation treatment of the battery 100, the generated gas is contained in the first air bag and the second air bag.

[0046] refer to Figure 6 After the formation treatment is completed, the first air bag is punctured and the area where the first body 111 is located is degassing. After the degassing treatment, the second sealing process is performed on the portion of the packaging film 130 located between the fourth sealing edge 145 and the first body 111 to form the second sealing edge 142. Figure 6 and Figure 7 , cutting can be performed along the left side of the second sealing edge 142, so that the left side portion of the second sealing edge 142 is cut off.

[0047] Similarly, refer to Figure 6 After the chemical treatment is completed, the second air bag is punctured and the area where the second body 121 is located is vented. After the venting process, the second sealing process is performed on the portion of the packaging film 130 located between the fifth sealing edge 146 and the second body 121 to form the third sealing edge 143. Figure 6 and Figure 7 , cutting can be performed along the right side of the third sealing edge 143, so that the right side portion of the third sealing edge 143 is cut off.

[0048] Furthermore, in order to omit the process of folding the portion where the first sealing edge 141 and the second sealing edge 142 are adjacent, the portion where the first sealing edge 141 and the second sealing edge 142 are adjacent can be cut to form a first cutting notch 1411; the portion where the first sealing edge 141 and the third sealing edge 143 are adjacent can be cut to form a second cutting notch 1412.

[0049] Furthermore, the second sealing edge 142 and the third sealing edge 143 may be folded so that the second sealing edge 142 is attached to the left side wall of the battery 100 and the third sealing edge 143 is attached to the right side wall of the battery 100 , so as to reduce the size of the battery 100 .

[0050] Combined with the above process flow, refer to Figure 2 In some embodiments, a first sealing edge 141 is provided on one side edge of the packaging film 130. The first core 110 further includes a first pole ear 112 and a second pole ear 113 extending from the first body 111, and the first pole ear 112 and the second pole ear 113 extend to the outside of the first sealing area through the first sealing edge 141. Among them, one of the first pole ear 112 and the second pole ear 113 is a positive pole ear, and the other is a negative pole ear. The second core 120 further includes a third pole ear 122 and a fourth pole ear 123 extending from the second body 121, and the third pole ear 122 and the fourth pole ear 123 extend to the outside of the second sealing area through the first sealing edge 141. One of the third pole ear 122 and the fourth pole ear 123 is a positive pole ear, and the other is a negative pole ear.

[0051] In some embodiments, the battery 100 further includes a circuit board 150. It should be noted that those skilled in the art generally refer to the circuit board 150 as a protection circuit board. The circuit board 150 is mainly used to protect the battery 100 during charging and discharging. It is understandable that the battery cannot be overcharged, over-discharged, over-currented, short-circuited, or charged and discharged at ultra-high temperatures during use. Therefore, the circuit board 150 can be used to monitor the voltage of the first core 110 and the second core 120 and the current of the charging and discharging circuit, and timely control the on and off of the current circuit to prevent the battery 100 from being damaged.

[0052] refer to Figure 2 , the circuit board 150 is disposed on the side of the first sealing edge 141 away from the first body 111 and the second body 121. In some embodiments, the circuit board 150 extends in a direction parallel to the first sealing edge 141, and one end of the circuit board 150 is opposite to one end of the first sealing edge 141, and the other end of the circuit board 150 is opposite to the other end of the first sealing edge 141. In other words, the circuit board 150 is connected to the first body 111 and the second body 121. Figure 2 , the circuit board 150 extends from the left side to the right side of the battery 100. In this way, the length dimension of the circuit board 150 can be increased, and then, when the width dimension of the circuit board 150 is appropriately reduced, the area of ​​the circuit board 150 for arranging components can also meet the requirements. In addition, illustratively, the circuit board 150 is a rigid circuit board. It should be noted that those skilled in the art generally refer to rigid circuit boards as rigid boards.

[0053] In some embodiments, the packaging film 130 is an integrated structure. The packaging film 130 further includes a bending portion 133, which connects the first film body portion 131 and the second film body portion 132 respectively, and the bending portion 133 is located at the edge of the packaging film 130 away from the first sealing edge 141. Figure 2 The lower edge of the packaging film 130 can be sealed by the bent portion 133. Of course, it can be understood that in other embodiments, the first film body 131 and the second film body 132 can be a split structure, and the lower edge of the packaging film 130 can be sealed by an edge sealing process.

[0054] In some embodiments, the packaging film 130 further includes a second sealing edge 142 and a third sealing edge 143 that are separated from each other. The second sealing edge 142 is respectively connected to one end of the bending portion 133 and one end of the first sealing edge 141, and the third sealing edge 143 is respectively connected to the other end of the bending portion 133 and the other end of the first sealing edge 141. Figure 2 The left edge of the packaging film 130 is sealed by the second sealing edge 142 , and the right edge of the packaging film 130 is sealed by the third sealing edge 143 .

[0055] In some embodiments, a first cutting notch 1411 is provided at a portion where the first sealing edge 141 and the second sealing edge 142 are adjacent, and a second cutting notch 1412 is provided at a portion where the first sealing edge 141 and the third sealing edge 143 are adjacent. Thus, by cutting the portion where the first sealing edge 141 and the second sealing edge 142 and the portion where the first sealing edge 141 and the third sealing edge 143 are adjacent, the process of folding the portion where the first sealing edge 141 and the second sealing edge 142 and the portion where the first sealing edge 141 and the third sealing edge 143 are adjacent is omitted.

[0056] It should be noted that in the above embodiments, the battery 100 including the first core 110 and the second core 120 is mainly used as an example for description. It is understandable that in other embodiments, the battery 100 may also include other cores. For example, when the battery 100 includes three cores, an air bag may be provided below the core, and then, after the formation process, the air bag below is cut off. In addition, the subsequent processes are not described in detail here.

[0057] The embodiment of the present application provides an electronic device. The electronic device provided by the embodiment of the present application includes any one of the batteries 100 provided by the embodiment of the present application.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the embodiments of the present application, and the scope of the embodiments of the present application is defined by the appended claims and their equivalents.

Claims

1. A battery, characterized in that: include: A first core, a second core and a packaging film; The first core includes a first body, and the second core includes a second body; The packaging film includes a first film body portion and a second film body portion that are arranged opposite to each other, the first body and the second body are respectively sandwiched between the first film body portion and the second film body portion, the first body and the second body are arranged at intervals, and the opposite sides of the first body and the second body form a spacing area, the first film body portion and the second film body portion are sealed and connected at the parts located in the spacing area, and the edge parts of the first film body portion and the second film body portion are sealed and connected to form a first sealing area that seals the first body and a second sealing area that seals the second body.

2. The battery according to claim 1, characterized in that The first film body is provided with a first groove and a second groove that are spaced apart from each other, the first body is provided in the first groove, the second body is provided in the second groove, and the second film body covers the notches of the first groove and the second groove.

3. The battery according to claim 1, characterized in that A first sealing edge is provided on one side edge of the packaging film; The first core further comprises a first pole lug and a second pole lug extending from the first body, wherein the first pole lug and the second pole lug extend outside the first sealing area through the first sealing edge; The second core further includes a third pole tab and a fourth pole tab extending from the second body, and the third pole tab and the fourth pole tab extend to outside the second sealing area through the first sealing edge.

4. The battery according to claim 3, characterized in that The battery further includes a circuit board, which is arranged on a side of the first sealing edge away from the first body and the second body.

5. The battery according to claim 4, characterized in that The circuit board extends in a direction parallel to the first sealing edge, and one end of the circuit board is opposite to one end of the first sealing edge, and the other end of the circuit board is opposite to the other end of the first sealing edge.

6. The battery according to claim 4, characterized in that The circuit board is a rigid circuit board.

7. The battery according to claim 3, characterized in that The packaging film is an integrated structure, and further comprises a bending portion, wherein the bending portion respectively connects the first film body portion and the second film body portion, and the bending portion is located at an edge of the packaging film that is away from the first sealing edge.

8. The battery according to claim 7, characterized in that The packaging film further includes a second sealing edge and a third sealing edge which are separated from each other. The second sealing edge is respectively connected to one end of the bending portion and one end of the first sealing edge. The third sealing edge is respectively connected to the other end of the bending portion and the other end of the first sealing edge.

9. The battery according to claim 8, characterized in that A first cutting notch is provided at a position where the first sealing edge is adjacent to the second sealing edge, and a second cutting notch is provided at a position where the first sealing edge is adjacent to the third sealing edge.

10. An electronic device, characterized in that: A battery comprising any one of claims 1 to 9.

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