Battery assembly and electronic device

Abstract

The application discloses a battery assembly and an electronic device. The battery assembly comprises a first electric core and a second electric core. The first electric core comprises a first electric core body and a first packaging film. The first packaging film comprises a first folding area, a first covering area, and a second covering area. At least part of the first folding area covers a side of the first electric core body facing the second electric core. A first surface of the first electric core body and a second surface of the first electric core body are two surfaces of the first electric core body opposite to each other. The second electric core comprises a second electric core body and a second packaging film. The second packaging film comprises a second folding area, a third covering area, and a fourth covering area. At least part of the second folding area covers a side of the second electric core body facing the first electric core. A first surface of the second electric core body and a second surface of the second electric core body are two surfaces of the second electric core body opposite to each other.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, and in particular to a battery assembly and an electronic device. BACKGROUND

[0002] In related technologies, with the rapid development of mobile intelligent terminal technology, the problem that the battery of the mobile intelligent terminal is not durable has become a pain point of the entire industry. In order to meet the needs of consumers, the capacity of the battery can only be greatly improved in the short term. There are two key parameters related to the capacity of the battery, one is the energy density, and the other is the volume of the battery cell. The energy density of the lithium cobalt oxide and graphite battery used in the mobile intelligent terminal has entered the later stage, so in order to improve the capacity of the battery, the volume of the battery cell can only be increased to meet the demand. At the same time, the fast charging function of the mobile intelligent terminal has become a trend, and in related technologies, a double-cell series connection method is usually used to improve the charging rate. Two single cells are assembled together in a left-right converging manner after screening.

[0003] In the process of assembling the battery, the circuit board needs to be connected to the top end of the assembled double cells. Due to the existence of the aluminum plastic film edge of the double cells, the edges of the two cells need to be folded at the converging position of the two cells to avoid the circuit board and avoid interference between the edges and the circuit board. Since the folding needs to be performed, the surface of the aluminum plastic film of the two cells needs to be folded three times at the converging position of the two cells to realize the folding of the edges of the top end of the cells. Three folds have exceeded the bearing range of the aluminum plastic film, which may cause damage to the aluminum plastic film. It can be seen that in related technologies, the process of packaging the cells is prone to damage to the aluminum plastic film. SUMMARY

[0004] The present application provides a battery assembly and an electronic device, which can avoid the problem that the aluminum plastic film is easily damaged in the process of packaging the cells.

[0005] In a first aspect, the present application provides a battery assembly comprising: a first cell and a second cell, the first cell and the second cell being located in the same plane;

[0006] The first electrode body includes a first electrode body and a first encapsulation film, the first encapsulation film includes: a first folding area folded along a side surface of the first electrode body toward the second electrode, a first coverage area extending from the first folding area to a first surface of the first electrode body, and a second coverage area extending from the first folding area to a second surface of the first electrode body, at least part of the first folding area covers the side surface of the first electrode body toward the second electrode, the first surface of the first electrode body and the second surface of the first electrode body are two surfaces of the first electrode body opposite to each other, the surface of the first folding area toward the second electrode forms a first side surface of the first electrode, and an area of the first surface of the first electrode body is greater than an area of the side surface of the first electrode body toward the second electrode.

[0007] The second electrode body includes a second electrode body and a second encapsulation film, the second encapsulation film includes: a second folding area folded along a side surface of the second electrode body toward the first electrode, a third coverage area extending from the second folding area to a first surface of the second electrode body, and a fourth coverage area extending from the second folding area to a second surface of the second electrode body, at least part of the second folding area covers the side surface of the second electrode body toward the first electrode, the first surface of the second electrode body and the second surface of the second electrode body are two surfaces of the second electrode body opposite to each other, the surface of the second folding area toward the first electrode forms a second side surface of the second electrode, and an area of the first surface of the second electrode body is greater than an area of the side surface of the second electrode body toward the first electrode.

[0008] In a second aspect, the application provides an electronic device comprising the battery assembly of the first aspect.

[0009] In the embodiment of the present application, the first packaging film is folded along the side of the first battery body facing the second battery, and the first folded region covers the side of the first battery body facing the second battery, to form the first side of the first battery, which is the converging position of the first battery and the second battery. Since the first folded region does not form an opening during packaging, the first folded region does not need to be additionally edge-sealed. In the embodiment of the present application, the converging position of the first battery facing the second battery does not have edge-sealing, so during edge-sealing of the top end of the first battery, only one folding is needed at the converging position of the first battery, thereby avoiding the problem of damage to the first packaging film due to the need for three foldings at the same position of the first packaging film. In addition, since only one folding is needed at the converging position of the first battery during edge-sealing of the top end of the first battery, it is beneficial to reduce the thickness space required by the edge-sealing region of the top end of the first battery, and the saved thickness space can be used to increase the volume of the first battery body, thereby facilitating an increase in the capacity of the first battery.

[0010] Correspondingly, the second packaging film is folded along the side of the second battery body facing the first battery, and the second folded region covers the side of the second battery body facing the first battery, to form the second side of the second battery, which is the converging position of the second battery and the first battery. Since the second folded region does not form an opening during packaging, the second folded region does not need to be additionally edge-sealed. In the embodiment of the present application, the converging position of the second battery facing the first battery does not have edge-sealing, so during edge-sealing of the top end of the second battery, only one folding is needed at the converging position of the second battery, thereby avoiding the problem of damage to the second packaging film due to the need for three foldings at the same position of the second packaging film. In addition, since only one folding is needed at the converging position of the second battery during edge-sealing of the top end of the second battery, it is beneficial to reduce the thickness space required by the edge-sealing region of the top end of the second battery, and the saved thickness space can be used to increase the volume of the second battery body, thereby facilitating an increase in the capacity of the second battery. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is one of the structural schematic diagrams of the battery assembly provided by the embodiment of the present application;

[0012] Figure 2 is a comparison schematic diagram of the folding mode of the packaging film in the related art and the folding mode of the packaging film in the embodiment of the present application;

[0013] Figure 3 is a comparison schematic diagram of the edge-sealing position of the packaging film in the related art and the edge-sealing position of the packaging film in the embodiment of the present application;

[0014] Figure 4 is Figure 1 a top view in a process of folding the first encapsulation film in relation to the first battery cell body in

[0015] Figure 5 is Figure 1 a top view in a process of folding the second encapsulation film in relation to the second battery cell body in

[0016] Figure 6 is a structural schematic diagram of a battery assembly provided by an embodiment of the present application;

[0017] Figure 7 is a schematic diagram of a process of encapsulating a first battery cell body using a first encapsulation film based on a method in the related art;

[0018] Figure 8 is a structural schematic diagram of a battery assembly provided by an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0020] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0021] The battery assembly and electronic device provided by the embodiments of the present application will be described in detail below in conjunction with the drawings and specific embodiments and application scenarios.

[0022] Please refer to Figures 1-8 , Figures 1-8 is a structural schematic diagram of a battery assembly provided by an embodiment of the present application, the battery assembly comprising: a first battery cell 100 and a second battery cell 200, the first battery cell 100 and the second battery cell 200 being located in the same plane;

[0023] The first electrode core 100 comprises a first electrode core body 110 and a first packaging film 120, the first packaging film 120 comprises a first folding area 121 folded along a side surface of the first electrode core body 110 towards the second electrode core 200, a first covering area 122 extending from the first folding area 121 to a first surface 111 of the first electrode core body 110, and a second covering area 123 extending from the first folding area 121 to a second surface 112 of the first electrode core body 110, the first folding area 121 covers the side surface of the first electrode core body 110 towards the second electrode core 200, the first surface 111 of the first electrode core body 110 and the second surface 112 of the first electrode core body 110 are two opposite surfaces of the first electrode core body 110, a surface of the first folding area 121 towards the second electrode core 200 forms a first side surface 130 of the first electrode core 100, and an area of the first surface 111 of the first electrode core body 110 is greater than an area of the side surface of the first electrode core body 110 towards the second electrode core 200.

[0024] The second electrode core 200 comprises a second electrode core body 210 and a second packaging film 220, the second packaging film 220 comprises a second folding area 221 folded along a side surface of the second electrode core body 210 towards the first electrode core 100, a third covering area 222 extending from the second folding area 221 to a first surface 211 of the second electrode core body 210, and a fourth covering area 223 extending from the second folding area 221 to a second surface 212 of the second electrode core body 210, at least part of the second folding area 221 covers the side surface of the second electrode core body 210 towards the first electrode core 100, the first surface 211 of the second electrode core body 210 and the second surface 212 of the second electrode core body 210 are two opposite surfaces of the second electrode core body 210, a surface of the second folding area 221 towards the first electrode core 100 forms a second side surface 230 of the second electrode core 200, and an area of the first surface 211 of the second electrode core body 210 is greater than an area of the side surface of the second electrode core body 210 towards the first electrode core 100.

[0025] It can be understood that the first electrode core 100 and the second electrode core 200 described above jointly form a double electrode core, that is, the battery assembly is a double electrode core battery assembly.

[0026] The first packaging film 120 described above can be various types of electrode core packaging films, for example, in some embodiments of the present application, the first packaging film 120 can be various types of aluminum plastic films.

[0027] The first and second battery cells 100 and 200 can be located in the same plane and brought together after packaging, for example, see Figure 1 In some embodiments of the present application, the first battery cell 100 is on the left side and the second battery cell 200 is on the right side. See Figure 2 b, a schematic diagram of the folding process of the first packaging film 120 along the side of the first battery cell body 110 towards the side of the second battery cell 200, as shown in Figure 4 In the embodiments of the present application, the first packaging film 120 is folded along the side of the first battery cell body 110 towards the side of the second battery cell 200 to cover the two opposite surfaces of the first battery cell body 110, and at the same time, the first folding area 121 is covered on the side of the first battery cell body 110 towards the second battery cell 200. At this time, there is no opening on the side of the first packaging film 120 towards the second battery cell 200, i.e. after folding, there is no opening on the first side 130 of the first battery cell 100, therefore, no additional packaging is needed for the first side 130 of the first battery cell 100.

[0028] Correspondingly, see Figure 7 a schematic diagram of the packaging process of the first battery cell body 110 using the first packaging film 120 based on the method in the related art, in which the first packaging film 120 is usually folded along the bottom end of the first battery cell body 110 to cover the two opposite surfaces of the first battery cell body 110, at this time, there is an opening on the side of the first packaging film 120 towards the second battery cell 200, therefore, the first side 130 of the first battery cell 100 needs to be edge sealed, see Figure 7 a schematic diagram of the edge sealing process of the first battery cell 100 in the related art, in which three foldings are needed: see Figure 7 a, a schematic diagram of the first folding, in which process, since the edges on both sides of the first packaging film 120 are in an unfolded state, the edges on both sides of the first packaging film 120 need to be folded towards the inside to form side edge seals, specifically, folding is performed in the direction indicated by the arrow in Figure 7 a to reduce the width, in which process, the first packaging film 120 is folded for the first time at the top end of the first side 130. See Figure 7 b, a schematic diagram of the second folding, since the top end of the double battery cell needs to be installed with a circuit board 300, the edge seal of the first side 130 of the first battery cell 100 will interfere with the circuit board 300, therefore, the edge seal of the first side 130 needs to be folded at an angle, specifically, folding is performed in the direction indicated by the arrow in Figure 7The first packaging film 120 is folded in the direction indicated by the arrow in b to eliminate the sharp corners of the edge, and at this time, the first packaging film 120 is folded for the second time at the top end of the first side 130. Please refer to Figure 7 c, which is a schematic view of the third folding, in which the top end of the first packaging film 120 is folded, specifically along Figure 7 The first packaging film 120 is folded in the direction indicated by the arrow in c to achieve the top sealing of the first battery cell 100, thereby reducing the length of the first battery cell 100, and in this process, the first packaging film 120 is folded for the third time at the top end of the first side 130. As can be seen, after packaging, the first packaging film 120 is folded for three times at the top end of the first side 130, which may cause the problem of damage to the aluminum plastic film at this position. In addition, since the first packaging film 120 is folded for three times at the top end of the first side 130, the thickness of the folded aluminum plastic film at this position is greater than that at other positions, and in the process of assembling the circuit board 300, a relief groove is usually needed to be formed in the middle of the circuit board 300 to avoid this position, thereby causing the problem of layout area loss of the circuit board 300.

[0029] Please refer to Figure 6 In the embodiment of the present application, since there is no opening of the first packaging film 120 at the first side 130, the first packaging film 120 at the first side 130 does not need to be folded for the first time, and since there is no edge of the first packaging film 120 at the first side 130, the first packaging film 120 at the first side 130 also does not need to be folded for the second time, so the first packaging film 120 at the first side 130 only needs to be folded for the third time to achieve the top sealing of the first battery cell 100. In this way, the problem of damage to the first packaging film 120 due to the need to fold the first packaging film 120 at the top of the first side 130 for three times can be avoided. At the same time, since the top of the first packaging film 120 only needs to be folded once, the thickness of the first battery cell 100 at the top of the first side 130 is the same as that at other positions, so the circuit board 300 does not need to form a relief groove at this position, thereby avoiding the problem of layout area loss of the circuit board 300.

[0030] It should be noted that the length of the circuit board 300 can be less than the sum of the widths of the first battery cell 100 and the second battery cell 200, and the circuit board 300 needs to cross the junction of the first battery cell 100 and the second battery cell 200, so in the related art, the edge of the first side surface 130 of the first battery cell 100 will interfere with the circuit board 300, but the edge of the side of the first battery cell 100 away from the second battery cell 200 will not interfere with the circuit board 300, and correspondingly, the edge of the side of the second battery cell 200 away from the first battery cell 100 will also not interfere with the circuit board 300. Therefore, in the embodiments of the present application, only the interference between the junction of the first battery cell 100 and the second battery cell 200 and the circuit board 300 needs to be overcome. For other folding modes at other positions, various folding modes can be used to achieve the folding, and the present embodiment does not limit this.

[0031] The second packaging film 220 can be various types of battery cell packaging films, for example, in some embodiments of the present application, the second packaging film 220 can be various types of aluminum-plastic films.

[0032] Please refer to Figure 1 In some embodiments of the present application, the first battery cell 100 is a left battery cell, and the second battery cell 200 is a right battery cell. Please refer to Figure 2 c, a schematic diagram of folding the second packaging film 220 along the side of the second battery cell body 210 toward the side of the first battery cell 100 during the process of packaging the second battery cell body 210, as shown in Figure 5 In the embodiments of the present application, the second packaging film 220 is folded along the side of the second battery cell body 210 toward the side of the first battery cell 100 to cover the two surfaces of the second battery cell body 210 opposite to each other, and at the same time, the second folding area 221 is covered on the side of the second battery cell body 210 toward the first battery cell 100. At this time, the side of the second packaging film 220 toward the first battery cell 100 does not have an opening, that is, after the second packaging film 220 is folded, the second side surface 230 of the second battery cell 200 does not have an opening, so no additional packaging is needed for the second side surface 230 of the second battery cell 200.

[0033] In the related art, when the second battery cell 200 is packaged, the second packaging film 220 is also folded along the side of the second battery cell body 210 toward the side of the first battery cell 100, and the second folding area 221 is covered on the side of the second battery cell body 210 away from the first battery cell 100. Figure 2The method shown in a, that is, the second packaging film 220 is folded three times at the top position of the second side surface 230, so that the thickness of the folded aluminum plastic film at this position is greater than that of the folded aluminum plastic film at other positions. During the assembly of the circuit board 300, a avoiding slot is usually needed to be opened at the middle position of the circuit board 300 to avoid this position, thereby causing the problem of layout area loss of the circuit board 300. In the embodiment of the application, since the second electrode group 200 does not have an opening at the second side surface 230, the second packaging film 220 does not need to be edge sealed at the position of the second side surface 230, thereby avoiding the above technical problem.

[0034] It can be understood that the shape and size of the first surface 111 of the first electrode group body 110 and the second surface 112 of the first electrode group body 110 can be equal, and the area of the first surface 111 of the first electrode group body 110 and the area of the second surface 112 of the first electrode group body 110 are also equal. For example, please refer to Figure 1 and Figure 4 The first electrode group body 110 is in the shape of a cuboid, the first surface 111 of the first electrode group body 110 and the second surface 112 of the first electrode group body 110 are respectively the upper and lower surfaces of the first electrode group body 110, and the side surface of the first electrode group body 110 towards the second electrode group 200 is the right side surface of the first electrode group body 110.

[0035] Correspondingly, the shape and size of the first surface 211 of the second electrode group body 210 and the second surface 212 of the second electrode group body 210 can be equal, and the area of the first surface 211 of the second electrode group body 210 and the area of the second surface 212 of the second electrode group body 210 are also equal. For example, please refer to Figure 1 and Figure 5 The second electrode group body 210 is in the shape of a cuboid, the first surface 211 of the second electrode group body 210 and the second surface 212 of the second electrode group body 210 are respectively the upper and lower surfaces of the second electrode group body 210, and the side surface of the second electrode group body 210 towards the first electrode group 100 is the left side surface of the first electrode group body 110.

[0036] The at least part of the first folding region 121 covering the side of the first battery body 110 towards the second battery 200 can mean that one part of the first folding region 121 covers the side of the first battery body 110 towards the second battery 200, and the head region and the tail region of the first folding region 121 protrude relative to the side of the first battery body 110 towards the second battery 200, wherein the head region and the tail region of the first folding region 121 can be used to edge the head and the tail of the first battery. It can be understood that all regions of the side of the first battery body 110 towards the second battery 200 are covered by the first folding region 121.

[0037] Correspondingly, the at least part of the second folding region 221 covering the side of the second battery body 210 towards the first battery 100 can mean that one part of the second folding region 221 covers the side of the second battery body 210 towards the first battery 100, and the head region and the tail region of the second folding region 221 protrude relative to the side of the second battery body 210 towards the first battery 100, wherein the head region and the tail region of the second folding region 221 can be used to edge the head and the tail of the second battery. It can be understood that all regions of the side of the second battery body 210 towards the first battery 100 are covered by the second folding region 221.

[0038] In this embodiment, the first packaging film 120 is folded along the side of the first electrode body 110 towards the side of the second electrode 200, and the first folded area 121 covers the side of the first electrode body 110 towards the side of the second electrode 200 to form the first side 130 of the first electrode 100, which is the location where the first electrode 100 and the second electrode 200 are close to each other. Since the first folded area 121 does not form an opening during the packaging process, the first folded area 121 does not need to be additionally edge-sealed. In this embodiment, the location where the first electrode 100 and the second electrode 200 are close to each other on the side of the first electrode 100 towards the second electrode 200 does not need to be edge-sealed, so during the process of edge-sealing the top end of the first electrode 100, the location where the first electrode 100 and the second electrode 200 are close to each other only needs to be folded once, thereby avoiding the problem of the first packaging film 120 being damaged due to the need to fold the same location three times. In addition, since the location where the first electrode 100 and the second electrode 200 are close to each other only needs to be folded once during the process of edge-sealing the top end of the first electrode 100, it is beneficial to reduce the thickness space required by the edge-sealing area of the top end of the first electrode 100, and the saved thickness space can be used to increase the volume of the first electrode body 110, thereby facilitating the increase of the capacity of the first electrode 100. Correspondingly, the second packaging film 220 is folded along the side of the second electrode body 210 towards the side of the first electrode 100, and the second folded area 221 covers the side of the second electrode body 210 towards the side of the first electrode 100 to form the second side 230 of the second electrode 200, which is the location where the second electrode 200 and the first electrode 100 are close to each other. Since the second folded area 221 does not form an opening during the packaging process, the second folded area 221 does not need to be additionally edge-sealed. In this embodiment, the location where the second electrode 200 and the first electrode 100 are close to each other on the side of the second electrode 200 towards the first electrode 100 does not need to be edge-sealed, so during the process of edge-sealing the top end of the second electrode 200, the location where the second electrode 200 and the first electrode 100 are close to each other only needs to be folded once, thereby avoiding the problem of the second packaging film 220 being damaged due to the need to fold the same location three times. In addition, since the location where the second electrode 200 and the first electrode 100 are close to each other only needs to be folded once during the process of edge-sealing the top end of the second electrode 200, it is beneficial to reduce the thickness space required by the edge-sealing area of the top end of the second electrode 200, and the saved thickness space can be used to increase the volume of the second electrode body 210, thereby facilitating the increase of the capacity of the second electrode 200.

[0039] Optionally, the first encapsulation film 120 further comprises a first edge sealing area 124, a second edge sealing area 125 and a third edge sealing area 126, the first edge sealing area 124 is located at the third side 140 of the first battery cell 100, the second edge sealing area 125 is located at the fourth side 150 of the first battery cell 100, and the third edge sealing area 126 is located at the fifth side 160 of the first battery cell 100, the first side 130 and the third side 140 are two opposite sides of the first battery cell 100, and the fourth side 150 and the fifth side 160 are adjacent to the first side 130 respectively.

[0040] Please refer to Figure 6 When the first side 130 is the right side of the first battery cell 100, the third side 140 is the left side of the first battery cell 100, and the area of the first side 130 is equal to the area of the third side 140, the fourth side 150 is the side of the upper end of the first battery cell 100, the fifth side 160 is the side of the lower end of the first battery cell 100, and the area of the fourth side 150 is equal to the area of the fifth side 160. Since the first side 130 is the lengthwise side of the first battery cell 100, the fourth side 150 is the widthwise side of the first battery cell 100, and the length of the first battery cell 100 is greater than the width of the first battery cell 100, the area of the first side 130 is greater than the area of the fourth side 150.

[0041] The first edge sealing area 124 can be an edge area of the left side of the first encapsulation film 120 folded inward to form a sealing edge to close the opening of the left side of the first encapsulation film 120. The second edge sealing area 125 can be an edge area of the upper end of the first encapsulation film 120 folded inward to form a sealing edge to close the opening of the upper end of the first encapsulation film 120. The third edge sealing area 126 can be an edge area of the lower end of the first encapsulation film 120 folded inward to form a sealing edge to close the opening of the lower end of the first encapsulation film 120.

[0042] In this embodiment, by providing the first edge sealing area 124, the second edge sealing area 125 and the third edge sealing area 126, the first battery cell body 110 can be encapsulated.

[0043] Optionally, the second encapsulation film 220 further comprises a fourth edge sealing area 224, a fifth edge sealing area 225 and a sixth edge sealing area 226, the fourth edge sealing area 224 is located at the sixth side 240 of the second battery cell 200, the fifth edge sealing area 225 is located at the seventh side 250 of the second battery cell 200, and the sixth edge sealing area 226 is located at the eighth side 260 of the second battery cell 200, the second side 230 and the sixth side 240 are two opposite sides of the second battery cell 200, and the seventh side 250 and the eighth side 260 are adjacent to the second side 230 respectively.

[0044] Please refer to Figure 6 When the second side 230 is the left side of the second battery cell 200, the sixth side 240 is the right side of the second battery cell 200, and the area of the second side 230 is equal to the area of the sixth side 240. The seventh side 250 is the side of the upper end of the second battery cell 200, the eighth side 260 is the side of the lower end of the second battery cell 200, and the area of the seventh side 250 is equal to the area of the eighth side 260. Since the second side 230 is the lengthwise side of the second battery cell 200, the seventh side 250 is the widthwise side of the second battery cell 200, and the length of the second battery cell 200 is greater than the width of the second battery cell 200, the area of the second side 230 is greater than the area of the seventh side 250.

[0045] The fourth edge sealing area 224 can be an edge area of the right side of the second encapsulation film 220 folded inward to form an edge sealing to close the opening of the right side of the second encapsulation film 220. The fifth edge sealing area 225 can be an edge area of the upper end of the second encapsulation film 220 folded inward to form an edge sealing to close the opening of the upper end of the second encapsulation film 220. The sixth edge sealing area 226 can be an edge area of the lower end of the second encapsulation film 220 folded inward to form an edge sealing to close the opening of the lower end of the second encapsulation film 220.

[0046] In this embodiment, by providing the fourth edge sealing area 224, the fifth edge sealing area 225 and the sixth edge sealing area 226, the second battery cell body 210 can be encapsulated.

[0047] Optionally, the battery assembly further comprises a circuit board 300, the first battery cell 100 further comprises a first tab 170 and a second tab 180, the second battery cell 200 further comprises a third tab 270 and a fourth tab 280, the first tab 170, the second tab 180, the third tab 270 and the fourth tab 280 are electrically connected to the circuit board 300 respectively, and the circuit board 300 comprises a power supply interface.

[0048] It can be understood that when the battery assembly is installed in an electronic device, the relevant power-consuming devices in the electronic device can be electrically connected with the power supply interface, so that the battery assembly can supply power to the power-consuming devices through the power supply interface. In addition, the circuit board 300 can further include a charging interface, so that the first battery cell 100 and the second battery cell 200 can be synchronously charged through the charging interface to achieve fast charging.

[0049] Among them, the first and second tabs 170 and 180 can be two tabs extending from the first battery cell body 110, and one of the first and second tabs 170 and 180 is a positive tab and the other is a negative tab. Correspondingly, the third and fourth tabs 270 and 280 can be two tabs extending from the second battery cell body 210, and one of the third and fourth tabs 270 and 280 is a positive tab and the other is a negative tab.

[0050] In this embodiment, the first battery cell 100 and the second battery cell 200 are electrically connected with the circuit board 300 through the tabs, so that the charging and discharging of the first battery cell 100 and the second battery cell 200 can be realized based on the circuit board 300.

[0051] Optionally, the circuit board 300 is located between the first side 130 and the second side 230, the first battery cell 100 further includes a fourth side 150 adjacent to the first side 130, and the extension direction of the circuit board 300 is perpendicular to the fourth side 150.

[0052] Please refer to Figure 8 , one end face of the circuit board 300 is opposite to the first side 130, and the other end face of the circuit board 300 is opposite to the second side 230. That is, compared with the arrangement in the related art, the circuit board 300 is changed from being horizontally placed on the top of the double battery cells to being vertically placed between the two battery cells.

[0053] In the related art, when the circuit board 300 is arranged on the top of the double battery cells, since the tabs of the battery cells are arranged from the top end, the battery cell body inside the battery cell may have a certain activity gap between the top end and the bottom end. When the electronic device to which the battery assembly belongs falls, the first battery cell body 110 and the second battery cell body 210 may have a certain relative movement between the top end and the bottom end of the corresponding battery cell, thereby impacting the second sealing edge area 125 and the fifth sealing edge area 225, resulting in a risk of sealing failure of the second sealing edge area 125 and the fifth sealing edge area 225. Especially for large-capacity battery cells, since the weight is relatively large, the inertia is also large, and therefore the impact force on the sealing edge area will also be large.

[0054] In this embodiment, by arranging the circuit board 300 between the first battery cell 100 and the second battery cell 200, the first battery cell 100 and the second battery cell 200 do not need to have the tabs from the top end, and thus the positions of the first battery cell body 110 and the second battery cell body 210 can be relatively fixed, thereby greatly reducing the impact of the battery cell body on the top edge area, and reducing the risk of edge failure.

[0055] Optionally, the first pair of folding regions 121 are provided with a first through hole 1211 and a second through hole 1212, the first tab 170 is arranged in the first through hole 1211, and the second tab 180 is arranged in the second through hole 1212.

[0056] The second pair of folding regions 221 are provided with a third through hole 2211 and a fourth through hole 2212, the third tab 270 is arranged in the third through hole 2211, and the fourth tab 280 is arranged in the fourth through hole 2212.

[0057] Please refer to Figure 8 In the embodiment of the present application, the first battery cell 100 is electrically connected to the circuit board 300 by the tabs from the first side 130, and the second battery cell 200 is electrically connected to the circuit board 300 by the tabs from the second side 230. Compared with the related art, the present application changes the way of the related art of the tabs from the top to the way of the tabs from the side.

[0058] In this embodiment, since the first pair of folding regions 121 do not have the edge area, by making the first tab 170 and the second tab 180 extend from the first pair of folding regions 121, the impact of the first battery cell body 110 on the edge area of the first battery cell 100 can be reduced, thereby reducing the risk of edge failure of the first battery cell 100. Correspondingly, the second pair of folding regions 221 also do not have the edge area, and thus by making the third tab 270 and the fourth tab 280 extend from the second pair of folding regions 221, the impact of the second battery cell body 210 on the edge area of the second battery cell 200 can be reduced, thereby reducing the risk of edge failure of the second battery cell 200.

[0059] Optionally, the first side 130 and the second side 230 are arranged opposite to each other, the fourth side 150 of the first battery cell 100 and the seventh side 250 of the second battery cell 200 are located in the same plane, the first side 130 is adjacent to the fourth side 150, the seventh side 250 is adjacent to the second side 230, the first tab 170 and the second tab 180 extend from one side of the fourth side 150, the third tab 270 and the fourth tab 280 extend from one side of the seventh side 250, and the fourth side 150 and the seventh side 250 are opposite to the first end surface of the circuit board 300, respectively.

[0060] The present application is related to Figure 8 Compared with the embodiment shown in the above, the difference between the present embodiment and the above embodiment is that the circuit board 300 in the present embodiment is still arranged on the top of the first battery cell 100 and the second battery cell 200.

[0061] In the present embodiment, since the first side surface 130 of the first battery cell 100 and the second side surface 230 of the second battery cell 200 are both free of the edge sealing, the circuit board 300 arranged on the top of the first battery cell 100 and the second battery cell 200 will not cause the problem of the above-mentioned aluminum plastic film damage, i.e., the battery assembly provided in the present embodiment can also avoid the problem of the first packaging film 120 damage caused by the need for three times of folding of the first packaging film 120. In addition, since only one folding is needed at the converging position of the first battery cell 100 in the process of the top end sealing of the first battery cell 100, it is beneficial to reduce the thickness space required to be occupied by the top end sealing area of the first battery cell 100, and the saved thickness space can be used to increase the volume of the first battery cell body 110, thereby being beneficial to increase the capacity of the first battery cell 100. At the same time, since only one folding is needed at the converging position of the second battery cell 200 in the process of the top end sealing of the second battery cell 200, it is beneficial to reduce the thickness space required to be occupied by the top end sealing area of the second battery cell 200, and the saved thickness space can be used to increase the volume of the second battery cell body 210, thereby being beneficial to increase the capacity of the second battery cell 200.

[0062] Optionally, the circuit board 300 comprises at least one of the following protection circuits: overcharge protection circuit and short circuit protection circuit.

[0063] It can be understood that, in addition to the overcharge protection circuit and the short circuit protection circuit, the circuit board 300 can also comprise other various protection circuits applied in the charging process. It can be understood that the above-mentioned protection circuits are the internal circuits of the circuit board 300, and the specific circuit structure of each protection circuit can be the same as the circuit structure of various protection circuits in the related art.

[0064] In the present embodiment, by providing various protection circuits in the circuit board 300, the safety of the charging and discharging process of the battery assembly can be improved.

[0065] Optionally, the first battery cell 100 further comprises a fourth side surface 150 adjacent to the first side surface 130, the first side surface 130 has a first edge length in a direction perpendicular to the fourth side surface 150, the fourth side surface 150 has a second edge length in a direction perpendicular to the first side surface 130, and the first edge length is greater than the second edge length.

[0066] The second electric core 200 further comprises a seventh side 250 adjacent to the second side 230, the second side 230 has a third side length in a direction perpendicular to the seventh side 250, the seventh side 250 has a fourth side length in a direction perpendicular to the second side 230, and the third side length is greater than the fourth side length.

[0067] In this embodiment, the first side length is greater than the second side length, please refer to Figure 3 b, when the first electric core 100 is edge-sealed, only one length direction side and two width direction sides of the first electric core 100 need to be edge-sealed, please refer to Figure 3 a, the embodiment shown in Figure 2 a, when the first electric core 100 is packaged, two length direction sides and one width direction side of the first electric core 100 need to be edge-sealed, therefore, the battery assembly provided in the embodiment can reduce the size of the edge-sealed area of the first electric core 100, and the size space saved can be used to increase the volume of the first electric core body 110, thereby facilitating the increase of the capacity of the first electric core 100. Correspondingly, please refer to Figure 3 c, when the second electric core 200 is packaged, only one length direction side and two width direction sides of the second electric core 200 need to be edge-sealed, therefore, the battery assembly provided in the embodiment can also reduce the size of the edge-sealed area of the second electric core 200, and the size space saved can be used to increase the volume of the second electric core body 210, thereby facilitating the increase of the capacity of the second electric core 200.

[0068] The embodiment further provides an electronic device, the electronic device comprising the battery assembly provided in the above embodiment.

[0069] In this embodiment, the electronic device comprises the battery assembly provided in the above embodiment, therefore, the electronic device has all the beneficial effects of the battery assembly, and details are not repeated here to avoid repetition.

[0070] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, but not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims.

Claims

1. A battery assembly, characterized in that: include: A first battery cell and a second battery cell, wherein the first battery cell and the second battery cell are located on the same plane; The first battery cell includes a first battery cell body and a first packaging film, the first packaging film including: a first folded area folded along the side of the first battery cell body facing the second battery cell, a first covering area extending from the first folded area to the first surface of the first battery cell body, and a second covering area extending from the first folded area to the second surface of the first battery cell body, at least a portion of the first folded area covers the side of the first battery cell body facing the second battery cell, the first surface of the first battery cell body and the second surface of the first battery cell body are two opposite surfaces of the first battery cell body, the surface of the first folded area facing the second battery cell forms the first side of the first battery cell, and the area of ​​the first surface of the first battery cell body is larger than the area of ​​the side of the first battery cell body facing the second battery cell; The second battery cell includes a second battery cell body and a second packaging film, the second packaging film including: a second folding region folded along a side of the second battery cell body facing the first battery cell, a third covering region extending from the second folding region to the first surface of the second battery cell body, and a fourth covering region extending from the second folding region to the second surface of the second battery cell body, at least a portion of the second folding region covers the side of the second battery cell body facing the first battery cell, the first surface of the second battery cell body and the second surface of the second battery cell body are two opposite surfaces of the second battery cell body, the surface of the second folding region facing the first battery cell forms the second side of the second battery cell, and the area of ​​the first surface of the second battery cell body is larger than the area of ​​the side of the second battery cell body facing the first battery cell; The battery assembly further includes a circuit board, which is located between the first side surface and the second side surface. The first battery cell further includes a fourth side surface adjacent to the first side surface, and an extension direction of the circuit board is perpendicular to the fourth side surface.

2. The battery assembly according to claim 1, wherein: The first packaging film also includes a first edge sealing area, a second edge sealing area and a third edge sealing area. The first edge sealing area is located on the third side of the first battery cell, the second edge sealing area is located on the fourth side of the first battery cell, and the third edge sealing area is located on the fifth side of the first battery cell. The first side and the third side are two opposite sides of the first battery cell, and the fourth side and the fifth side are adjacent to the first side respectively.

3. The battery assembly according to claim 1, wherein: The second packaging film also includes a fourth edge sealing area, a fifth edge sealing area and a sixth edge sealing area. The fourth edge sealing area is located on the sixth side of the second battery cell, the fifth edge sealing area is located on the seventh side of the second battery cell, and the sixth edge sealing area is located on the eighth side of the second battery cell. The second side and the sixth side are two opposite sides of the second battery cell, and the seventh side and the eighth side are adjacent to the second side respectively.

4. The battery assembly according to claim 1, wherein: The first battery cell further includes a first electrode tab and a second electrode tab, and the second battery cell further includes a third electrode tab and a fourth electrode tab. The first electrode tab, the second electrode tab, the third electrode tab and the fourth electrode tab are electrically connected to the circuit board respectively.

5. The battery assembly according to claim 4, characterized in that The first folded area is provided with a first through hole and a second through hole, the first tab is passed through the first through hole, and the second tab is passed through the second through hole; The second folded area is provided with a third through hole and a fourth through hole. The third electrode tab is passed through the third through hole, and the fourth electrode tab is passed through the fourth through hole.

6. The battery assembly according to claim 4, characterized in that The first side surface is arranged opposite to the second side surface, the fourth side surface of the first battery cell and the seventh side surface of the second battery cell are located in the same plane, the first side surface is adjacent to the fourth side surface, and the seventh side surface is adjacent to the second side surface, the first pole tab and the second pole tab extend from one side of the fourth side surface, the third pole tab and the fourth pole tab extend from one side of the seventh side surface, and the fourth side surface and the seventh side surface are respectively opposite to the first end surface of the circuit board.

7. The battery assembly according to claim 4, characterized in that The circuit board includes at least one of the following protection circuits: an overcharge protection circuit and a short circuit protection circuit.

8. The battery assembly according to claim 1, wherein: The first battery cell further includes a fourth side surface adjacent to the first side surface, the first side surface has a first side length along a direction perpendicular to the fourth side surface, the fourth side surface has a second side length along a direction perpendicular to the first side surface, and the first side length is greater than the second side length; The second battery cell also includes a seventh side surface adjacent to the second side surface, the side length of the second side surface along a direction perpendicular to the seventh side surface is a third side length, the side length of the seventh side surface along a direction perpendicular to the second side surface is a fourth side length, and the third side length is greater than the fourth side length.

9. An electronic device, characterized in that: A battery assembly comprising the battery assembly according to any one of claims 1 to 8.

Images