Battery and electronic device using same

Abstract

This application discloses a battery and an electronic device using the same. The electronic device includes a case in which a storage space is formed, a plurality of functional devices, and a battery. The plurality of functional devices occupy a portion of the storage space, and the battery occupies almost the entire remaining storage space. The battery includes a plurality of electrode assemblies, a housing, and a flexible circuit. The plurality of electrode assemblies are accommodated in the housing. The flexible circuit forms an integral structure with the housing and is arranged according to a predetermined series / parallel connection relationship of the plurality of electrode assemblies and the positions of the lead-out portions. The electrode assemblies and the corresponding functional devices avoid each other in terms of occupying space and form a complementary relationship, thereby realizing full utilization of the storage space.

Description

[Technical field]

[0001] (Reference to Related Applications) This disclosure claims priority to a Chinese patent application bearing application number 202110340406.4 and entitled "Battery and Electronic Device Using the Same," filed with the China National Intellectual Property Office on March 30, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of batteries, and more particularly to batteries and electronic devices using the same. [Background technology]

[0003] Electronic devices such as notebook computers, tablet computers, and mobile phones are increasingly designed to be thin due to the need for aesthetics and portability. Usually, the external dimensions and layouts of functional components inside such electronic devices are different, but the installation method of the battery, which is an important component, is basically the same, that is, a separate battery compartment needs to be pre-installed for the battery, and the battery and the battery compartment are basically regular in external shape, and some space needs to be given up to avoid other functional components, which is disadvantageous to the thinning of electronic devices. At the same time, the battery usually includes multiple cells, and in order to meet the requirements of output voltage, output current, sampling, control, etc., many connection circuits need to be installed, which is complex in structure and occupies a lot of space. Summary of the Invention

[0004] In view of this, the present application discloses a battery and an electronic device using the same, which aims to provide a battery structure that simplifies the battery structure, improves the space utilization rate inside the electronic device, and contributes to making the electronic device thinner.

[0005] The solution is as follows:

[0006] The battery is applied to an electronic device including a case in which an accommodation space is formed, and a plurality of functional devices accommodated in the case and occupying a part of the accommodation space of the case, the battery including a plurality of electrode assemblies, a housing, and a flexible circuit; The plurality of electrode assemblies are each installed to a predetermined size standard and disposed at a predetermined position so as to substantially occupy the remaining space of the receiving space, and an extension portion is provided at a predetermined position of the electrode assembly, the housing protrudes outward at a predetermined position, and has a plurality of corresponding receiving grooves formed therein, the plurality of receiving grooves being adapted to the outer dimensions of the plurality of electrode assemblies so as to receive the plurality of electrode assemblies correspondingly; the flexible circuit forms an integral structure with the housing, and is arranged according to a predetermined series / parallel connection relationship of the plurality of electrode assemblies and positions of the lead-out portions; the flexible circuit includes an output terminal and a plurality of connection portions, and the plurality of connection portions are connected to the corresponding lead-out portions so as to electrically connect the plurality of electrode assemblies; The output terminals extend outside the housing to provide electrical access.

[0007] In a preferred embodiment, the flexible circuit further includes a wire portion, the wire portion being integrally formed inside the housing; The plurality of connection portions and the output terminal are disposed on the wire portion, and the connection portions protrude from the inside of the case and extend to the corresponding lead-out portions.

[0008] In a preferred embodiment, the housing includes a first case and a second case, the first case is positioned in substantially the same plane, the second case is installed opposite the first case, and defines the accommodation space together with the first case, and is recessed at predetermined positions in a direction away from the first case to form the plurality of accommodation grooves; The flexible circuit is attached to an inner wall of the first case.

[0009] In a preferred embodiment, the housing includes a first case and a second case, the first case is positioned in substantially the same plane, the second case is installed opposite the first case, and defines the accommodation space together with the first case, and is recessed at predetermined positions in a direction away from the first case to form the plurality of accommodation grooves; The flexible circuit is attached to an inner wall of the second case and is distributed in a non-stretched area of ​​the second case.

[0010] In a preferred embodiment, the flexible circuit comprises a flexible circuit layer and an insulating layer; The flexible circuit layer is attached to an inner wall of the housing and includes the wire portion, the connection portion and the output terminal, and the insulating layer is coated on the outside of the flexible circuit layer and exposes the connection portion and the output terminal.

[0011] In a preferred embodiment, the flexible circuit layer includes a plurality of wire segments, the plurality of wire segments being pre-installed according to the predetermined series / parallel connection relationship and the positions of the lead-out portions and the output terminals; At least one of the connection portion and the output terminal is preformed integrally with one of the wire segments; The insulating layer covers the wire segments.

[0012] In a preferred embodiment, the insulating layer is formed by applying an insulating material to a surface of the wire segment.

[0013] In a preferred embodiment, the electrode assembly includes a plurality of stacked positive electrode sheets, a separator, and a negative electrode sheet, the positive electrode sheet being provided with a positive electrode tab, and the negative electrode sheet being provided with a negative electrode tab, The positive electrode tabs of each electrode assembly are connected in a concentrated manner to form a positive electrode lead portion, and the negative electrode tabs of each electrode assembly are connected in a concentrated manner to form a negative electrode lead portion, The connection portion protrudes from the wire segment and extends to a position where it abuts against the corresponding positive electrode lead portion or negative electrode lead portion.

[0014] In a preferred embodiment, the insulating layer is an insulating film laminated to the outside of the flexible circuit layer and bonded to the housing.

[0015] The electronic device according to the present application includes a case, a plurality of functional devices, and the battery described above. The case has a storage space formed therein, the plurality of functional devices are attached within the case and occupy a portion of the housing space; The battery occupies substantially the remaining space of the receiving space.

[0016] In the battery and electronic device using the battery, the functional device of the electronic device and the battery are fitted to each other, and the electrode assembly and the corresponding functional device avoid each other in terms of space occupancy and form a complementary relationship, thereby realizing full utilization of the storage space. At the same time, by utilizing the characteristics of the flexible circuit being easy to mold and arrange, the flexible circuit can be integrally formed inside the case, thereby simplifying the circuit design of the battery. This improves the utilization rate of the internal space of the electronic device and makes it easy to make the electronic device thinner. [Brief description of the drawings]

[0017] The above and other objects and advantages of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0018] [Figure 1] FIG. 2 is an exploded view of the electronic device according to the preferred embodiment. [Diagram 2] FIG. 2 is a schematic diagram of a battery in an electronic device according to a preferred embodiment. [Diagram 3] FIG. 3 is a schematic diagram of an embodiment of an electrode assembly and a flexible circuit in the battery shown in FIG. 2. [Figure 4]FIG. 3 is a schematic diagram of another embodiment of the electrode assembly and flexible circuit in the battery shown in FIG. 2. [Diagram 5] FIG. 3 is a schematic diagram showing the distribution of electrode assemblies in the battery shown in FIG. 2. [Figure 6] FIG. 3 is a schematic diagram showing the distribution of flexible circuits in the battery shown in FIG. 2. [Figure 7] FIG. 3 is a schematic diagram showing the connection between the electrode assembly and the connection circuit in the battery shown in FIG. 2. [Figure 8] FIG. 5 is a schematic diagram of an embodiment of the electrode assembly and the first case shown in FIG. 4. [Figure 9] FIG. 3 is a schematic diagram of an electrode assembly in the battery shown in FIG. 2. [Figure 10] 10 is a schematic diagram showing a connection structure between the electrode assembly and a wire portion shown in FIG. 9. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present disclosure will be described in detail. The embodiments described with reference to the drawings are merely illustrative. Hereinafter, embodiments of the present disclosure will be described in detail.

[0020] 1, an electronic device 100 includes a case 10, a battery 20, and a functional device 30. In the case 10, an accommodation space for accommodating the battery 20 and the functional device 30 is formed.

[0021] The functional device 30 is attached within the case 10 and occupies a part of the accommodation space. The battery 20 occupies almost the remaining space of the accommodation space.

[0022] For example, in some application scenarios, the electronic device 100 may be a portable device such as a notebook computer, a tablet computer, or other smart electronic products such as a mobile phone, a wearable device, etc. Take the electronic device 100 as an example of a notebook computer, the case 10 is correspondingly a housing for the host part of the notebook computer, and the functional device 30 mainly includes a motherboard, a CPU, a hard disk, a memory, a video card, a sound card, a radiator, etc. The battery 30 is a battery that supplies power to the notebook computer.

[0023] In actual applications, after the CPU, hard disk, memory, video card, sound card and radiator are attached to one side of the motherboard, the side facing the internal accommodating space of the housing occupies a part of the accommodating space. Furthermore, the specifications of the functional devices are diverse and the external dimensions are different. After assembly, due to the influences of the unevenness of the functional devices and the arrangement spacing between the functional devices, the shape of the remaining accommodating space is irregular and not flat.

[0024] Usually, an independent battery compartment is installed in the case 10, and the battery compartment is installed in a regular shape for ease of design and processing, but since it is necessary to completely avoid the functional device 30, a lot of irregular space cannot be utilized.

[0025] In view of this, in the electronic device 100 disclosed in the present application, the functional device 30 is attached within the case 10 and occupies a part of the accommodation space, and the battery 20 occupies almost the remaining space of the accommodation space. Note that the term "almost" here refers to the fact that the remaining space cannot be strictly and completely occupied due to factors such as limitations on processing accuracy, assembly requirements, and electrical safety requirements, and therefore the battery 20 can occupy almost the remaining space of the accommodation space, and the battery 20 and the functional device 30 avoid each other so as to utilize the volume of the accommodation space as much as possible, and are complementary in volume.

[0026] As shown in FIGS. 2 to 4, in order to achieve the above object, a battery 20 according to an embodiment of the present application includes a housing 210, a plurality of electrode assemblies 220, and a flexible circuit 230. As shown in FIG.

[0027] The plurality of electrode assemblies 220 each have a predetermined outer dimension and are arranged at a predetermined position. In a specific implementation, since the electronic device 100 needs to realize a specific function, the functional device 30 may be installed in the case 10 before the battery 20. Accordingly, the shape and distribution of the remaining space in the case 10 are also basically determined, and thus the outer dimension and position distribution of the plurality of electrode assemblies 220 can be pre-defined based on the shape and distribution of the remaining space, and the series and / or parallel connection relationship between the plurality of electrode assemblies 220 can be pre-defined to set the output current, voltage, etc., in order to meet the requirement that the battery 20 can output power to the outside.

[0028] At least two of the electrode assemblies 220 may have different heights and may be set according to the volume occupancy of the functional device 30. In this way, the electrode assemblies 220 may be installed to avoid each other in terms of height with the functional devices 30, i.e., when the battery 20 is placed in the storage space, the functional devices 30 of the electronic device 100 occupy a part of the storage space, and the outer dimensions and position distribution of the electrode assemblies 220 are preset according to the arrangement of the functional devices 30 in the battery 20, and the electrode assemblies 220 are installed at a height that matches the functional devices 30 at the corresponding positions, for example, when the height of the functional devices 30 is high at a predetermined position, the height of the electrode assemblies 220 installed correspondingly is set low, and when the height of the functional devices 30 is low, the height of the electrode assemblies 220 installed correspondingly is set high, so that the battery 20 occupies almost the remaining space of the storage space, thereby realizing full utilization of the storage space.

[0029] In a specific implementation, the shape of the electrode assembly 220 may be a regular shape formed by a winding process. For example, in order to reduce the difficulty of processing, the electrode assembly 220 may be formed into a substantially rectangular parallelepiped shape. The electrode assembly 220 may also be installed in an irregular shape, i.e., a deformed shape, such as a rhombus, a sector, a trapezoid, etc. In this case, the electrode assembly 220 may be formed by lamination. In practical application, the shape of the electrode assembly 220 may be set according to the installation requirements of the accommodation space.

[0030] An extension portion 2201 is provided at a predetermined position of the electrode assembly 220 so as to realize series and parallel connections between a plurality of electrode assemblies 220 .

[0031] The housing 210 protrudes outward at predetermined positions, and a plurality of receiving grooves 2121 are correspondingly formed inside the housing 210. The receiving grooves 2121 are adapted to the outer dimensions of the plurality of electrode assemblies 220 so as to receive the plurality of electrode assemblies 220 correspondingly.

[0032] The flexible circuit 230 forms an integral structure with the housing 210 and is arranged according to a predetermined series / parallel connection relationship of the electrode assemblies 220 and the position of the lead-out portion 2201. The flexible circuit 230 includes an output terminal 2303 and a plurality of connection portions 2302, which are connected to the corresponding lead-out portions 2201 to electrically connect the electrode assemblies 220. The output terminal 2303 extends outside the housing 210 to realize electrical lead-out.

[0033] It can be understood that the flexible circuit 230 and the housing 210 form an integral structure, and the main body portion of the flexible circuit 230 is integrally fixed inside the housing 210 by a process such as gluing, fitting, welding, coating, etc., and the output terminal 2303 and the connection portion 2302 of the flexible circuit 230 can protrude from the inside of the housing 210, so as to realize electrical connection with the multiple electrode assemblies 220 through the connection portion 2302, and to realize electrical extraction of the battery 20 through the output terminal 2303.

[0034] For example, in a preferred embodiment, the flexible circuit 230 includes a wire portion 2301, the connection portion 2302, and the output terminal 2303. The wire portion 2301 is integrally formed inside the housing 210. The connection portions 2302 and the output terminal 2303 are disposed on the wire portion 2301, and the connection portions 2302 protrude from the inside of the housing 210 and extend to the corresponding drawing portions 2201.

[0035] As described above, in order to meet the requirement that the battery 20 can output power to the outside after the plurality of electrode assemblies 220 are arranged in a predetermined position, the series and / or parallel connection relationship between the plurality of electrode assemblies 220 can be preset to set the output current, voltage, etc. If the connection of the plurality of electrode assemblies 220 is realized using a normal circuit with a coating, the safety performance of the battery will be reduced due to the non-foldable characteristic of the normal circuit, and if the circuit is directly connected inside the battery, the overall layout will be disturbed and complicated. Therefore, the patent uses a flexible circuit that can be freely curved, wound and folded to solve the risk caused by the non-foldable characteristic of the normal circuit. By designing the series / parallel connection relationship between each electrode assembly 220 in the flexible circuit in advance, each of the positive electrode connection terminals and the negative electrode connection terminals connected to the electrode assembly 220 in the flexible circuit 230 are drawn out to the electrode assembly 220 at the corresponding position, and are connected to the positive electrode pins and the negative electrode pins drawn out from the corresponding positions of the electrode assembly 220 to realize the series / parallel connection of the plurality of electrode assemblies 220.

[0036] In another preferred embodiment, the housing 210 includes a first case 2110 and a second case 2120 .

[0037] The first case 2110 is located in approximately the same plane. In other words, the first case 2110 is a substantially flat plate-like structure. The second case 2120 is installed facing the first case 2110 and defines the accommodation space together with the first case 2110. The second case 2120 is recessed at predetermined positions in a direction away from the first case 2110 to form the plurality of accommodation grooves 2121.

[0038] In practical application, the housing 210 can be an aluminum plastic film, and the first case 2110 is a flat surface of the aluminum plastic film, and the second case 2120 can be stretched at a predetermined position to form the receiving groove 2121.

[0039] In a specific implementation, according to the predetermined outer dimensions and predetermined position distribution of the plurality of electrode assemblies 220, the aluminum plastic film can be pressed to different depths according to specific positions, but the flexible circuit 230 cannot be pressed, so the flexible circuit 230 is designed as a bottom flat film that does not need to be pressed on the aluminum plastic film, and the connection parts 2302 at the positions corresponding to each electrode assembly 220 must be reserved. Then, the positive electrode / negative electrode lead parts 2201 at each position of the electrode assembly 230 are electrically connected to the connection parts 2302 corresponding to the flexible circuit 230, respectively. The connection parts 2302 of the electrode assembly 220 are usually formed by concentrating spot welding the tabs of each electrode sheet. The lead parts 2201 and the connection parts 2302 are electrically connected by spot welding, rivets, etc., so as to realize the series / parallel connection between each electrode assembly 220 inside the battery 20.

[0040] The flexible circuit 230 may be integral with the first case 2110 or may be integral with the second case 2120 .

[0041] For example, the flexible circuit 230 is attached to the inner wall of the first case 2110. In another embodiment, the flexible circuit 230 may be attached to the inner wall of the second case 2120, and the flexible circuit 230 needs to be distributed in the non-stretched area 2122 of the second case 2120 because it cannot be pressed and stretched.

[0042] The flexible circuit 230 includes a flexible circuit layer and an insulating layer 2304. The flexible circuit layer is attached to an inner wall of the housing 210. In a specific implementation, the flexible circuit layer may include a wire portion 2301, the connection portion 2302 and the output terminal 2303.

[0043] For example, when the flexible circuit 230 and the first case 2110 form an integral structure, in a specific implementation, the positive / negative lead-out portion 2201 at each position of the electrode assembly 230 may be disposed adjacent to the inner surface of the first case 2110, and after the flexible circuit layer is attached to the inner wall of the first case 2110, the connection portion 2302 may be folded from the inner wall of the first case 2110 to extend to the positive / negative lead-out portion 2201 at the corresponding position of the electrode assembly 230. The insulating layer 2304 is coated on the outside of the flexible circuit layer and exposes the connection portion 2302 and the output terminal 2303. Thus, the insulating layer 2304 isolates the side of the flexible circuit layer adjacent to the electrode assembly 220, plays a role of insulation protection, and can prevent subsequent circuit corrosion caused by the electrolyte in the battery.

[0044] In a preferred embodiment, the flexible circuit layer includes a plurality of wire segments, which are pre-installed according to the predetermined series / parallel connection relationship and the positions of the lead-out portion 2201 and the output terminal 2303. At least one of the connection portion 2302 and the output terminal 2303 is pre-formed integrally with one of the wire segments.

[0045] For example, as shown in FIG. 5 to FIG. 10, in a specific embodiment, the battery 20 includes five electrode assemblies 220, specifically shown as a first electrode assembly 2210, a second electrode assembly 2220, a third electrode assembly 2230, a fourth electrode assembly 2240, and a fifth electrode assembly 2250. These electrode assemblies 220 are all rectangular parallelepiped-shaped, and each electrode assembly has three dimensions, namely, a length, a width, and a height, and the width and the length are the dimensions of the electrode assembly in two directions perpendicular to the height direction, respectively. As described above, at least two of the five electrode assemblies 220 have different heights. In a specific implementation, since the specifications of the functional devices 30 in the electronic device 100 are different, the five electrode assemblies 220 usually have different heights, and at least two of the five electrode assemblies 220 have different widths and / or different lengths. In this embodiment, the first to fifth electrode assemblies are all different in length, width and height, and can be installed according to specific requirements during implementation.

[0046] The first electrode assembly 2210, the second electrode assembly 2220, the third electrode assembly 2230, the fourth electrode assembly 2240 and the fifth electrode assembly 2250 are arranged in a predetermined pattern with a gap between adjacent electrode assemblies. The lead-out portion 2201 of each electrode assembly 220 is arranged toward the gap since it needs to be connected to the flexible circuit 230. As shown in FIG. 3 , the positive electrode lead-out portion and the negative electrode lead-out portion of the second electrode assembly 2220 are disposed in the space between the second electrode assembly 2220 and the third electrode assembly 2230, the positive electrode lead-out portion and the negative electrode lead-out portion of the third electrode assembly 2230 are disposed in the space between the third electrode assembly 2230 and the fifth electrode assembly 2250, the positive electrode lead-out portions of the fourth electrode assembly 2240 and the fifth electrode assembly 2250 are disposed in the space between the fourth electrode assembly 2240 and the fifth electrode assembly 2250, and the negative electrode lead-out portion of the fifth electrode assembly 2250 is disposed in the space between the fifth electrode assembly 2250 and the first electrode assembly 2210, and the positive electrode lead-out portion and the negative electrode lead-out portion of the first electrode assembly 2210 and the negative electrode lead-out portion of the fourth electrode assembly 2240 are disposed toward the outer periphery of the electrode assemblies, respectively.

[0047] Correspondingly, the wire portion 2301 of the flexible circuit 230 is arranged as a plurality of wire segments to realize a predetermined series / parallel connection relationship between the first to fifth electrode assemblies. For example, as shown in FIG. 4, when it is necessary to realize that the first electrode assembly 2210 is connected in series to the second electrode assembly 2220 and the third electrode assembly 2230 connected in parallel, and is further connected in series to the fourth electrode assembly 2240 and the fifth electrode assembly 2250 connected in parallel, the wire portion 2301 may be arranged into four segments, i.e., a first wire segment 2310, a second wire segment 2320, a third wire segment 2330, and a fourth wire segment 2340.

[0048] As shown in FIG. 7, the first wire segment 2310 is connected to the positive electrode lead-out portion of the first electrode assembly 2210 and is redundantly used as the positive electrode output terminal of the battery 20.

[0049] One end of the second wire segment 2320 is connected to the negative electrode lead-out portion of the first electrode assembly 2210, and the other end is split into two connection portions 2302 which are connected to the positive electrode lead-out portions of the second electrode assembly 2220 and the third electrode assembly 2230, respectively.

[0050] Both ends of the third wire segment 2330 are divided into two connection portions 2302, and the two connection portions 2302 at one end are connected to the negative electrode lead-out portion of the second electrode assembly 2220 and the negative electrode lead-out portion of the fifth electrode assembly 2250, respectively, and the two connection portions 2302 at the other end are connected to the positive electrode lead-out portion of the fourth electrode assembly 2240 and the positive electrode lead-out portion of the fifth electrode assembly 2250, respectively.

[0051] One end of the fourth wire segment 2340 is split into two connection parts 2320, which are respectively connected to the negative electrode lead-out portion of the fourth electrode assembly 2240 and the negative electrode lead-out portion of the fifth electrode assembly 2250, and the other end is redundantly used as the negative electrode output terminal of the battery 20.

[0052] By installing and connecting the wire segments as described above, a series connection of the first electrode assembly 2210, the parallel-connected second electrode assembly 2220 and third electrode assembly 2230, and the parallel-connected fourth electrode assembly 2240 and fifth electrode assembly 2250 can be realized, and positive and negative outputs of the battery 20 can be realized.

[0053] The insulating layer 2304 covers the wire segments. For example, in a preferred embodiment, the insulating layer 2304 is formed by applying an insulating material to the surface of the wire segments. In another preferred embodiment, the insulating layer 2304 may be an insulating film laminated on the outside of the flexible circuit layer 2312 and bonded to the housing 210. In a specific implementation, as shown in FIG. 8 to FIG. 10, the housing 210 may be an aluminum plastic film, and at the same time, the flexible circuit layer and the insulating layer 2304 may be pre-designed on the aluminum plastic film, and the flexible circuit layer and the insulating layer 2304 having corrosion resistance and insulating properties are pre-fitted into the original nylon layer 2111, Al layer 2112 and PP layer 2113 of the aluminum plastic film, and then the positive electrode tab and the negative electrode tab are pulled out by the positive electrode tab pin and the negative electrode tab pin to realize the tab pull-out.

[0054] The electrode assembly 220 is an electrode body including a positive electrode sheet 221, a separator 222, and a negative electrode sheet 223. For example, in a preferred embodiment, the electrode assembly 220 includes a plurality of stacked positive electrode sheets 221, separators 222, and negative electrode sheets 223, a positive electrode tab 2211 is provided on the positive electrode sheet 221, and a negative electrode tab 2231 is provided on the negative electrode sheet 223.

[0055] The positive electrode tabs 2211 of each electrode assembly 220 are connected in a concentrated manner to form a positive electrode lead portion, and the negative electrode tabs 2231 of each electrode assembly 220 are connected in a concentrated manner to form a negative electrode lead portion.

[0056] The connection portion 2302 protrudes from the flexible circuit 230 and extends to a position where it abuts on the corresponding positive electrode lead portion or negative electrode lead portion so as to be electrically connected to the corresponding positive electrode lead portion or negative electrode lead portion.

[0057] In the above-mentioned battery 20 and electronic device 100 using the same, the external shapes of the functional device 30 of the electronic device 100 and the battery 20 fit each other, and the electrode assembly 220 and the corresponding functional device 30 avoid each other in terms of occupying space and form a complementary relationship, thereby realizing full utilization of the storage space. At the same time, by utilizing the characteristic that the flexible circuit 230 is easy to mold and arrange, the flexible circuit 230 is integrally formed inside the case 210, thereby simplifying the circuit design of the battery 20 and making the design and layout of the battery 20 easier. This improves the utilization rate of the internal space of the electronic device 100 and makes it easy to realize a slim electronic device 100.

[0058] The flexible circuit 230 is accommodated in the housing and arranged to electrically connect the multiple electrode assemblies 220 according to the predetermined series / parallel connection relationship of the multiple electrode assemblies 220 and the position of the pull-out portion 2201, and is wired inside the housing 210 of the battery 20 to realize the electrical connection of the electrode assemblies 220, and the output terminal extends outside the housing to realize the electrical pull-out, thereby simplifying the external circuit and reducing the occupation of the external circuit and components in the internal space of the electronic device 100.

[0059] In a preferred embodiment, the flexible circuit further includes a wire portion 2301 and a plurality of connection portions 2302 disposed on the wire portion 2301. The wire portion 2301 is disposed on the periphery of the electrode assembly 220 according to a predetermined series / parallel connection relationship of the plurality of electrode assemblies 220 and the positions of the lead-out portions 2201. The plurality of connection portions 2302 are disposed on the wire portion 2301 and are electrically connected to the lead-out portions 2201 at corresponding positions. The output terminal 2303 is disposed on the wire portion 2301.

[0060] In a specific implementation, the electrode assembly 220 is manufactured by winding a positive electrode sheet, a separator, and a negative electrode sheet, and tabs are previously provided on the positive electrode sheet and the negative electrode sheet, and accordingly, the lead-out portion 2201 may include a positive electrode lead-out portion formed by intensively welding the positive electrode tab after winding, and a negative electrode lead-out portion formed by intensively welding the negative electrode tab. The lead-out portion 2201 may be provided on a side of the electrode assembly 220, and the lead-out portions 2201 of a plurality of electrode assemblies 220 may be provided on approximately the same plane to facilitate the arrangement of the flexible circuit 230.

[0061] The wire part 2301 may include a plurality of wire segments that are pre-installed according to the predetermined series / parallel connection relationship and the positions of the lead-out parts. The plurality of electrode assemblies 220 have different dimensional specifications to meet space occupancy requirements, but need to be connected according to a predetermined series / parallel connection relationship to meet power output requirements. The wire part 2301 is pre-installed as a plurality of wire segments, and thus can more easily realize a predetermined series / parallel connection, especially a series connection, according to the arrangement of the electrode assemblies 220.

[0062] In order to facilitate processing and simplification of the connection step, at least one of the connection portion 2302 and the output terminal 2303 may be preformed integrally with one of the wire segments. In a specific implementation, the connection portion 2302 may be integrally formed with the corresponding wire segment and located at the end of the corresponding wire segment. The output terminal 2303 may include a positive output terminal and a negative output terminal, one of which may be integrally formed with the wire segment and the other of which may be formed by the wire segment. The outside of the wire portion is covered with an insulating film 240 to achieve electrical insulation protection. Parts of the connection portion 2302 and the output terminal 2303 are exposed to facilitate electrical connection.

[0063] When the plurality of electrode assemblies 220 are arranged, a gap may be provided between adjacent electrode assemblies 220. The lead-out portion 2201 of each electrode assembly 220 is arranged toward the gap since it needs to be connected to the flexible circuit 230. The portion of the wire portion 2301 located between the adjacent electrode assemblies 220 is fitted into the corresponding gap. In this way, electrical connection between the flexible circuit 230 and the lead-out portion 2201 of the electrode assembly 220 is facilitated, and since the lead-out portion 2201 of the electrode assembly 220 originally needs to occupy a part of the space, fitting the wire portion 2301 of the flexible circuit 230 into the gap that originally needs to be reserved is equivalent to using the part of the space redundantly, which improves space utilization and also makes wiring easier.

[0064] In a specific implementation, the housing 210 may include a first case 2110 and a second case 2120 .

[0065] The first case 2110 is located in approximately the same plane, that is, the first case 2110 is an approximately flat film and forms a flat surface of the housing 210. The term "approximately" used here may refer to tolerances, errors, or local irregularities due to the influence of local design requirements in a specific implementation, and the first case 2110 only needs to be approximately flat.

[0066] The second case 2120 is recessed at predetermined positions in a direction away from the first case 2110 to form the plurality of receiving grooves 2121. The shape of each receiving groove 2121 corresponds to the shape of the corresponding electrode assembly 220.

[0067] The first case 2110 and the second case 2120 are provided with sealing parts on their peripheries, respectively, and the first case 2110 and the second case 2120 are hermetically connected to each other by the sealing parts, thereby sealing the electrode assembly 220 and the flexible circuit 230 in the case 210. The outside of the output terminal 2303 is covered with a sealant layer (not shown). The output terminal 2303 extends out of the housing 210 between the two sealing parts and is hermetically connected to the corresponding position of the sealing part through the sealant layer to realize electrical extraction of the battery 20.

[0068] The lead-out portion 2201 of the electrode assembly 220 and the flexible circuit 230 are disposed adjacent to the first case 2110. The flat first case 2110 allows for orderly wiring and also prevents stress deformation in the later stages as much as possible.

[0069] In the description herein, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," "particular examples," or "some examples" mean that the specific feature, configuration, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the description herein, exemplary references to the above terms do not necessarily refer to the same embodiment or example.

[0070] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and objectives of the present disclosure, and that the scope of the present disclosure is limited by the claims and their equivalents. [Explanation of symbols]

[0071] 10 Cases 20 batteries 30 Functional Devices 100 Electronic equipment 210 Housing 220 Electrode Assembly 221 Positive electrode sheet 222 Separator 223 Negative electrode sheet 230 Flexible Circuit 2110 Case 1 2120 Case 2 2121 Storage ditch 2122 Non-stretched area 2201 Drawer section 2211 Positive electrode tab 2231 Negative electrode tab 2210 First electrode assembly 2220 Second electrode assembly 2230 Third electrode assembly 2240 4th electrode assembly 2250 5th electrode assembly 2301 Wire rod section 2302 Connection 2303 Output terminal 2304 Insulating layer 2310 First wire segment 2320 Second Wire Segment 2330 3rd Wire Segment 2340 4th wire segment

Claims

1. A case in which a storage space is formed; A battery for use in an electronic device including a plurality of functional devices housed in the case and occupying a portion of a housing space of the case, The battery includes a plurality of electrode assemblies, a housing, and a flexible circuit; The plurality of electrode assemblies are arranged at predetermined positions with predetermined dimensions so as to substantially occupy the remaining space of the accommodation space, and an extension portion is provided at each of the predetermined positions of the electrode assemblies; the predetermined dimensions of at least two electrode assemblies among the plurality of electrode assemblies are different; the housing protrudes outward at a predetermined position, and a plurality of corresponding receiving grooves are formed inside the housing, the plurality of receiving grooves are adapted to outer dimensions of the plurality of electrode assemblies so as to receive the plurality of electrode assemblies correspondingly, and at least two of the plurality of receiving grooves have different dimensions adapted to the predetermined dimensions of two electrode assemblies having different predetermined dimensions; The flexible circuit forms an integral structure with the housing and is arranged according to a predetermined series / parallel connection relationship of the multiple electrode assemblies and the positions of the pull-out portions, the flexible circuit includes an output terminal and a multiple connection portions, the multiple connection portions are connected to corresponding pull-out portions so as to electrically connect the multiple electrode assemblies, and the output terminal extends outside the housing to realize electrical pull-out.

2. the flexible circuit further includes a wire portion, the wire portion being integrally formed inside the housing; 2. The battery according to claim 1, wherein the plurality of connection portions and the output terminal are disposed on the wire portion, and the connection portions protrude from the inside of the case and extend to the corresponding draw-out portions.

3. The housing includes a first case and a second case, the first case is positioned in substantially the same plane, the second case is installed opposite the first case, and defines the accommodation space together with the first case, and is recessed at predetermined positions in a direction away from the first case to form the plurality of accommodation grooves; The battery of claim 1 or 2, wherein the flexible circuit is attached to an inner wall of the first case.

4. The housing includes a first case and a second case, The first case is located in substantially the same plane, the second case is disposed opposite to the first case, defines the accommodation space together with the first case, and is recessed at predetermined positions in a direction away from the first case to form the plurality of accommodation grooves; The battery according to any one of claims 1 to 3, characterized in that the flexible circuit is attached to an inner wall of the second case and distributed in a non-stretched area of ​​the second case.

5. The flexible circuit includes a flexible circuit layer and an insulating layer, 3. The battery according to claim 2, characterized in that the flexible circuit layer is attached to an inner wall of the housing and includes the wire portion, the connection portion and the output terminal, and the insulating layer is coated on the outside of the flexible circuit layer and exposes the connection portion and the output terminal.

6. the flexible circuit layer includes a plurality of wire segments, the plurality of wire segments being arranged according to the predetermined series / parallel connection relationship and the positions of the lead-out portions and the output terminals; At least one of the connection portion and the output terminal is integrated with one of the wire segments; The battery according to claim 5 , wherein the insulating layer covers the plurality of wire segments.

7. 7. The battery according to claim 6, wherein the insulating layer is formed by applying an insulating material to a surface of the wire segment.

8. The electrode assembly includes a plurality of stacked positive electrode sheets, a separator, and a negative electrode sheet, a positive electrode tab is provided on the positive electrode sheet, and a negative electrode tab is provided on the negative electrode sheet; A plurality of the positive electrode tabs of each electrode assembly are connected together to form a positive electrode lead, and a plurality of the negative electrode tabs are connected together to form a negative electrode lead, 8. The battery according to claim 7, wherein the connection portion protrudes from the wire segment and extends to a position where it abuts against a corresponding positive electrode lead portion or negative electrode lead portion.

9. The battery according to any one of claims 6 to 8, wherein the insulating layer is an insulating film laminated on the outside of the flexible circuit layer and bonded to the housing.

10. A battery comprising a case, a plurality of functional devices, and the battery according to any one of claims 1 to 9, The case has a storage space formed therein, the plurality of functional devices are attached within the case and occupy a portion of the housing space; The electronic device, wherein the battery substantially occupies the remaining space of the accommodation space.

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