Battery and electronic device

Abstract

The application provides a battery, comprising a shell and an electrode assembly arranged in the shell, the electrode assembly comprising a first pole piece, a second pole piece and a separator, the separator being arranged between the first pole piece and the second pole piece, the electrode assembly being formed by winding the first pole piece, the separator and the second pole piece. The shell comprises a first wall, the first wall comprising a first conductive region and a first non-conductive region connected with the first conductive region. The electrode assembly further comprises a first conductive member, the first conductive member electrically connecting the first pole piece and the first conductive region, so that only the conductive region of the shell has polarity, and other regions do not have polarity, thereby canceling the process of wrapping the battery with insulating glue outside, reducing the process cost and reducing the loss of energy density. In addition, due to the arrangement of the first conductive region, for the first polarity, a pole is not needed to be arranged to lead out the polarity. The application further provides an electronic device with the above battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of batteries, in particular to a battery and an electronic device with the same. BACKGROUND

[0002] The shell of the existing battery is usually a metal shell. After the metal shell is connected with the battery cell inside the shell, the entire area of the metal shell has polarity, so that the non-connected area of the battery needs to be wrapped with insulating glue during installation and use, resulting in an increase in process cost and an increase in energy density loss of the battery. In addition, there are two ways to lead out the electrode of the metal shell battery: one is to provide a pole on the shell, which occupies the thickness of the battery, thereby reducing the energy density of the battery; the other is to insulate between two shells; the two shells are of different polarity, but the insulating structure makes the walls of the two shells overlap, thereby adversely affecting the energy density. SUMMARY

[0003] In view of the above, the present application provides a battery and an electronic device with the same. By providing a first conductive area and a first non-conductive area on the shell, and connecting the first conductive area and the first pole piece of the electrode assembly by a first conductive member, only the conductive area of the shell has polarity, and the other areas do not have polarity, thereby eliminating the process of wrapping the battery with insulating glue, reducing the process cost and reducing the energy density loss.

[0004] An embodiment of the present application provides a battery, comprising a shell and an electrode assembly arranged in the shell, the electrode assembly comprising a first pole piece, a second pole piece and a separator, the separator being arranged between the first pole piece and the second pole piece, the electrode assembly being formed by winding the first pole piece, the separator and the second pole piece. The shell comprises a first wall, the first wall comprising a first conductive area and a first non-conductive area connected with the first conductive area. The electrode assembly further comprises a first conductive member, the first conductive member being electrically connected with the first pole piece and the first conductive area.

[0005] Further, the shell further comprises a second wall arranged opposite to the first wall, and a side wall located between the first wall and the second wall. The second wall comprises a second conductive area and a second non-conductive area connected with the second conductive area. The electrode assembly further comprises a second conductive member, the second conductive member being electrically connected with the second pole piece and the second conductive area, and an insulating member being arranged between the first conductive member and the second conductive member.

[0006] In an optional embodiment, the first conductive area is provided with a first groove on one side of the electrode assembly, and one end of the first conductive member is arranged in the first groove.

[0007] Further, the first conductive region is welded to the first conductive member.

[0008] In an optional embodiment, the first conductive region is provided with a second groove, and the first non-conductive region is provided with a first protrusion, the first protrusion being arranged in the second groove.

[0009] In an optional embodiment, the electrode assembly comprises a first end face, the first end face facing the first wall, and one end of the first conductive member protruding from the first end face and electrically connected to the first conductive region.

[0010] Further, one end of the first conductive member is provided with a first protrusion, the first protrusion abutting against the first end face.

[0011] In an optional embodiment, the electrode assembly comprises a second end face arranged opposite to the first end face, the second end face facing the second wall, and one end of the second conductive member protruding from the second end face and electrically connected to the second conductive region.

[0012] Further, one end of the second conductive member is provided with a second protrusion, the second protrusion abutting against the second end face.

[0013] In an optional embodiment, the first conductive member and the second conductive member are arranged side by side, and the first pole piece, the isolation film and the second pole piece are wound around the first conductive member and the second conductive member.

[0014] In an optional embodiment, the first conductive member and the second conductive member are arranged in a stacked manner along an axial direction of the electrode assembly.

[0015] In an optional embodiment, the first conductive region is made of metal, and the first non-conductive region is made of plastic.

[0016] In an optional embodiment, the first conductive region and the first non-conductive region are connected by injection molding.

[0017] An electronic device comprising a circuit element and the battery of any of the above-mentioned embodiments, the circuit element being electrically connected to the battery.

[0018] The battery described above cancels the process of wrapping the battery with insulating glue on the outside, reduces the process cost, and reduces the loss of energy density, by arranging the first conductive region and the first non-conductive region on the shell, and connecting the first conductive region and the first pole piece of the electrode assembly by the first conductive member, so that only the conductive region of the shell has polarity, and other regions do not have polarity. In addition, due to the arrangement of the first conductive region, no pole is needed to be arranged to lead out the polarity for the first polarity. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A schematic plan view of the battery in an embodiment.

[0020] Figure 2 A schematic side view of the battery. Figure 1

[0021] Figure 3 A schematic cross-sectional view of the battery. Figure 1

[0022] Figure 4 A schematic cross-sectional view of the battery in an embodiment.

[0023] Figure 5 A schematic cross-sectional view of the case in an embodiment.

[0024] Figure 6 A schematic cross-sectional view of the case in an embodiment.

[0025] Figure 7 A schematic cross-sectional view of the case in an embodiment.

[0026] Figure 8 A schematic cross-sectional view of the case in an embodiment.

[0027] Figure 9 A schematic cross-sectional view of the case in an embodiment.

[0028] Figure 10 A schematic cross-sectional view of the case in an embodiment.

[0029] Figure 11 A schematic view of the case in other embodiments.

[0030] Figure 12 A block diagram of the electronic device in an embodiment.

[0031] Explanation of main element symbols:

[0032] Battery 100

[0033] Case 10

[0034] First wall 11

[0035] First conductive region 111

[0036] First non-conductive region 112

[0037] First recess 113

[0038] Second recess 114

[0039] First protrusion 115​​

[0040] Second wall 12

[0041] Second conductive region 121

[0042] Second non-conductive region 122

[0043] Third recess 123

[0044] Fourth recess 124

[0045] Second protrusion 125

[0046] Side wall 13

[0047] Guide hole 14

[0048] First housing 101

[0049] Second housing 102

[0050] First mounting groove 103

[0051] Step surface 1031

[0052] Second mounting groove 104

[0053] Step surface 1041

[0054] Connection portion 105

[0055] Electrode assembly 20

[0056] First pole piece 21

[0057] Second pole piece 22

[0058] Isolation film 23

[0059] First conductive member 24

[0060] First protruding portion 241

[0061] Second conductive member 25

[0062] Second protruding portion 251

[0063] Insulating member 26

[0064] First isolation portion 261

[0065] Second isolation portion 262

[0066] Third isolation portion 263

[0067] First end surface 27

[0068] Second end surface 28

[0069] Electronic device 200

[0070] Circuit element 201 DETAILED DESCRIPTION

[0071] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0072] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. When an element is referred to as being "disposed" on another element, it can be directly disposed on the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0074] The embodiments of the present application provide a battery, comprising a shell and an electrode assembly disposed in the shell, the electrode assembly comprising a first pole piece, a second pole piece and a separator, the separator being disposed between the first pole piece and the second pole piece, the electrode assembly being formed by winding the first pole piece, the separator and the second pole piece. The shell comprises a first wall, the first wall comprising a first conductive area and a first non-conductive area connected with the first conductive area. The electrode assembly further comprises a first conductive member, the first conductive member being electrically connected with the first pole piece. The first conductive member is electrically connected with the first conductive area.

[0075] The above-mentioned battery is provided with a first conductive area and a first non-conductive area on the shell, and a first conductive member is used to connect the first conductive area and the first pole piece of the electrode assembly, so that only the conductive area of the shell has polarity, and other areas do not have polarity, thereby canceling the process of wrapping the battery with insulating glue outside, reducing the process cost and reducing the loss of energy density.

[0076] Some embodiments of the present application are described in detail. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0077] Referring to Figure 1 , Figure 2 and Figure 3 In one embodiment, the battery 100 includes a housing 10 and an electrode assembly 20 disposed in the housing 10. The electrode assembly 20 includes a first electrode tab 21, a second electrode tab 22, and a separator 23 disposed between the first electrode tab 21 and the second electrode tab 22. The electrode assembly 20 is formed by winding the first electrode tab 21, the separator 23, and the second electrode tab 22. The housing 10 includes a first wall 11 including a first conductive region 111 and a first non-conductive region 112 connected to the first conductive region 111. The electrode assembly 20 further includes a first conductive member 24 electrically connected to the first electrode tab 21. The first conductive member 24 is electrically connected to the first conductive region 111, such that the first conductive region 111 is electrically connected to the first electrode tab 21.

[0078] Please continue to refer to Figure 3The shell 10 further comprises a second wall 12 opposite to the first wall 11, and a side wall 13 between the first wall 11 and the second wall 12. The second wall 12 comprises a second conductive area 121 and a second non-conductive area 122 connected to the second conductive area 121. The electrode assembly 20 further comprises a second conductive member 25 electrically connected to the second tab 22 and the second conductive area 121. An insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25 to prevent short circuit inside the battery 100. Of course, in other embodiments, the second wall 12 can be a metal shell, and the electrode assembly 20 does not comprise the second conductive member 25, and the tab of the second tab 22 is electrically connected to the second wall 12. The electrode assembly 20 comprises a first end face 27 and a second end face 28 opposite to the first end face 27. The first end face 27 faces the first wall 11, and one end of the first conductive member 24 extends out of the first end face 27 and is electrically connected to the first conductive area 111. The second end face 28 faces the second wall 12, and one end of the second conductive member 25 extends out of the second end face 28 and is electrically connected to the second conductive area 121. The first conductive area 111 further comprises a first recess 113 on one side of the electrode assembly 20, and one end of the first conductive member 24 extending out of the first end face 27 is arranged in the first recess 113 to facilitate positioning and connection between the first conductive member 24 and the first conductive area 111. One end of the first conductive member 24 extending out of the first end face 27 further comprises a first protruding portion 241 abutting the first end face 27, and the first protruding portion 241 is also arranged in the first recess 113. One end of the second conductive member 25 extending out of the second end face 28 comprises a second protruding portion 251 abutting the second end face 28.

[0079] The first conductive region 111 is also provided with a second groove 114 on the side, and the first non-conductive region 112 is provided with a first protrusion 115 arranged in the second groove 114, which is conducive to strengthening the connection between the first conductive region 111 and the first non-conductive region 112 and preventing the first conductive region 111 from separating from the first non-conductive region 112. Of course, a groove can also be arranged on the first non-conductive region 112, and a protrusion is arranged on the first conductive region. The second wall 12 has a structure similar to that of the first wall 11. The second conductive region 121 is provided with a third groove 123 on the side facing the electrode assembly 20. One end of the second conductive member 25 extending out of the second end surface 28 is arranged in the third groove 123, and the second protruding part 251 is also arranged in the third groove 123. The second conductive region 121 is also provided with a fourth groove 124 on the side, and the second non-conductive region 122 is provided with a second protrusion 125 arranged in the fourth groove 124.

[0080] In the embodiment of the present application, the first conductive region 111 and the second conductive region 121 are made of metal, and the first non-conductive region 112, the second non-conductive region 122 and the side wall 13 are made of plastic. The first conductive region 111 and the first non-conductive region 112 are connected by injection molding. The second conductive region 121 and the second non-conductive region 122 are also connected by injection molding. After the injection molding process is completed, the connection between the metal material and the plastic material is coated with a sealing material such as hot melt adhesive on the upper and lower surfaces to ensure the sealing performance of the connection.

[0081] Please refer again to Figure 1 and Figure 3 In the embodiment of the present application, the first conductive region 111 and the first conductive member 24 are connected by welding, and the second conductive region 121 and the second conductive member 25 are connected by welding. The welding method includes but is not limited to laser welding. The outer surface of the first conductive region 111 is also provided with a guide hole 14 for guiding the direction and position of laser welding, reducing the penetration thickness of external laser welding and improving the welding tensile force. The guide hole 14 is a blind hole arranged on the surface of the first conductive region 111. The bottom of the guide hole 14 is a welding area. The welding laser is injected from the opening end of the guide hole 14 to weld the bottom of the guide hole 14 and the first conductive member 24. Compared with directly welding the first conductive region 111 and the first conductive member 24, the thickness of the bottom of the guide hole 14 is relatively thin, thereby achieving the purpose of reducing the penetration thickness of external laser welding. Since the guide hole 14 is a blind hole, the sealing performance of the first conductive region 111 will not be damaged. During the laser welding process, the molten material can be filled into the guide hole 14 to seal the guide hole 14.

[0082] In Figure 3In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25. Figure 3 In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25. Figure 4 In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25.

[0083] In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25. Figure 5 In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25. Figure 5 In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25. Figure 9 In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25.

[0084] In the shown embodiment, the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner along the axial direction of the electrode assembly 20, so that the first conductive member 24 and the second conductive member 25 are arranged in a stacked manner from top to bottom, and the insulating member 26 is arranged between the first conductive member 24 and the second conductive member 25. Figure 6 and Figure 10In another embodiment, the first shell 101 and the second shell 102 are both hollow structures with an opening at one end, the opening end of the first shell 101 is buckled with the opening end of the second shell 102, and the connection mode is planar connection. The first shell 101 and the second shell 102 can be distributed left and right or up and down, and the application is not limited thereto.

[0085] Please refer to Figure 7 In an optional embodiment, the first shell 101 is a cover-like structure, and the second shell 102 is a hollow structure with an opening at one end, the opening end of the second shell 102 is provided with a first mounting groove 103, and the first mounting groove 103 is located on the inner side wall of the second shell 102. The side of the first shell 101 facing the second shell 102 abuts against the stepped surface 1031 of the first mounting groove 103, and the side edge of the first shell 101 is fixed in the first mounting groove 103 to close the second shell 102.

[0086] Please refer to Figure 8 In an optional embodiment, one side of the opening end of the second shell 102 is provided with a second mounting groove 104, and the second mounting groove 104 is located on the outer side wall of the second shell 102. One side of the first shell 101 is provided with a connecting part 105, the connecting part 105 matches the second mounting groove 104, and the connecting part 105 is arranged in the second mounting groove 104. The end of the connecting part 105 abuts against the stepped surface 1041 of the second mounting groove 104, and the other side of the opening end of the second shell 102 is planarly connected with the first shell 101, so that the connection mode between the first shell 101 and the second shell 102 is diversified, and the sealing performance of the shell 10 is improved.

[0087] Please refer to Figure 11 In the embodiment of the application, the cross-sectional shape of the shell 10 is approximately rectangular, and in other embodiments, the cross-sectional shape of the shell 10 also includes but is not limited to circular, polygonal, triangular, irregular shape, etc., which can be designed according to actual product requirements. The material of the first shell 101 and the second shell 102 includes but is not limited to liquid crystal high molecular polymer, resin, polyvinyl fluoride, polyimide, polycarbonate, etc. electrolyte-resistant hard plastic. When the shell 10 is approximately cuboid, the length and width of the first shell 101 and / or the second shell 102 are in the range of 5-100mm, the height is in the range of 1-10mm, and the wall thickness is in the range of 0.05-5mm, so as to adapt to different sizes and specifications of the electrode assembly 20.

[0088] Please refer to Figure 12In one of the embodiments of the present application, an electronic device 200 is provided, which comprises a circuit element 201 and the battery 100 of any of the above embodiments, and the circuit element 201 is electrically connected to the battery 100.

[0089] The above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application.

Claims

1. A battery, comprising: a housing; and an electrode assembly disposed in the housing, the electrode assembly comprising a first electrode tab, a second electrode tab, and a separator disposed between the first electrode tab and the second electrode tab, the electrode assembly being formed by winding the first electrode tab, the separator, and the second electrode tab; characterized in that the housing comprises a first wall, the first wall comprising a first conductive region and a first non-conductive region connected to the first conductive region; the electrode assembly further comprising a first conductive member, the first electrode tab, the separator, and the second electrode tab being wound around the first conductive member, a winding start end of the first electrode tab being electrically connected to the first conductive member; the electrode assembly comprising a first end face, the first end face facing the first wall, one end of the first conductive member extending out of the first end face and being electrically connected to the first conductive region. the housing further comprising a second wall disposed opposite to the first wall, and a side wall between the first wall and the second wall; 2. The battery of claim 1, wherein, the second wall comprising a second conductive region and a second non-conductive region connected to the second conductive region; the electrode assembly further comprising a second conductive member, the second conductive member being electrically connected to the second electrode tab and the second conductive region, and an insulating member being disposed between the first conductive member and the second conductive member. the first conductive region being provided with a first groove on a side facing the electrode assembly, one end of the first conductive member being disposed in the first groove.

3. The battery of claim 1, wherein the cathode comprises a lithium metal oxide. the first conductive region being welded to the first conductive member.

4. The battery of claim 3, wherein the cathode is a lithium cobalt oxide cathode. the first conductive region being provided with a second groove on a circumferential side, the first non-conductive region being provided with a first protrusion, the first protrusion being disposed in the second groove.

5. The battery of claim 1, wherein the cathode comprises a lithium metal oxide. one end of the first conductive member being provided with a first protruding portion, the first protruding portion abutting against the first end face.

6. The battery of claim 1, wherein the cathode comprises a lithium metal oxide. the electrode assembly comprising a second end face disposed opposite to the first end face, the second end face facing the second wall, one end of the second conductive member extending out of the second end face and being electrically connected to the second conductive region.

7. The battery of claim 2, wherein the cathode comprises a lithium cobalt oxide. one end of the second conductive member being provided with a second protruding portion, the second protruding portion abutting against the second end face.

8. The battery of claim 7, wherein the cathode is a lithium cobalt oxide cathode. the first conductive member and the second conductive member being disposed side by side, the first electrode tab, the separator, and the second electrode tab being wound around the first conductive member and the second conductive member.

9. The battery of claim 2, wherein the cathode comprises a lithium cobalt oxide. the first conductive member and the second conductive member being disposed in a stacked manner along an axial direction of the electrode assembly.

10. The battery of claim 2, wherein the cathode comprises a lithium cobalt oxide. the first conductive region being made of metal, and the first non-conductive region being made of plastic.

11. The battery of claim 1, wherein the cathode comprises a lithium metal oxide. the first conductive region and the first non-conductive region being connected by injection molding.

12. The battery of claim 1, wherein the cathode comprises a lithium metal oxide. a circuit element and the battery of any one of claims 1-12, the circuit element being electrically connected to the battery.

13. An electronic device, comprising: ​

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