Battery and terminal device

Abstract

The invention discloses a battery and a terminal device. The battery comprises a battery cell and a circuit board assembly, the battery cell comprises an electrode assembly, a packaging bag and two tabs. The packaging bag comprises a main body part and a packaging part, and the electrode assembly is arranged in the main body part. The main body part comprises a top wall, the packaging part comprises a top sealing part, and the top sealing part is connected to the top wall. The top sealing part comprises a bent part, and the bent part and the top wall are arranged in the second direction when observed in the first direction. One end of the tab is connected with the electrode assembly, and the other end of the tab extends out of the bending part. The circuit board assembly comprises a first circuit board and two first substrates connected to the first circuit board, the first circuit board is located on the side, away from the top wall, of the bent part in the second direction, and the two tabs are arranged at intervals in the third direction. When observed in the second direction, the two first substrates are arranged at intervals in the third direction, one first substrate is overlapped with one tab, and the first substrate and the tab are connected to the two opposite sides of the first circuit board respectively. The battery can improve the energy density.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly to a battery and a terminal device. Background Art

[0002] The first substrate located at the head of the battery usually includes a circuit board and a reinforcing board. The circuit board is used to connect to the tab, and the reinforcing board is stacked with the circuit board and located on the side of the circuit board away from the tab. This will cause the reinforcing board to occupy a relatively large space at the head, thereby reducing the energy density of the battery. Summary of the Invention

[0003] In view of the above situation, this application provides a battery, which is beneficial to improving the energy density.

[0004] An embodiment of this application provides a battery, which includes a battery cell and a circuit board assembly. The battery cell includes an electrode assembly, a packaging bag, and two tabs. The packaging bag includes a main body portion and a sealing portion. The electrode assembly is disposed within the main body portion. The main body portion includes a top wall, and the sealing portion includes a top sealing portion which is connected to the top wall. The top sealing portion includes a bending portion. When observed in a first direction, the bending portion and the top wall are arranged in a second direction. One end of the tab is connected to the electrode assembly, and the other end of the tab extends out from the bending portion. The thickness direction of the battery cell is the first direction. The circuit board assembly includes a first circuit board and two first substrates connected to the first circuit board. The first circuit board is located on the side of the bending portion away from the top wall in the second direction. The two tabs are spaced apart in a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. When observed in the second direction, the two first substrates are spaced apart in the third direction. One first substrate overlaps with one tab, and one first substrate and one tab are respectively connected to opposite sides of the first circuit board.

[0005] In the above battery, when observed in the second direction, the two first substrates are spaced apart in the third direction. One first substrate overlaps with one tab, and one first substrate and one tab are respectively connected to opposite sides of the first circuit board. The first substrate can improve the structural strength of the part where the first circuit board is connected to the tab. Compared with the existing method of setting a whole reinforcing board on one side of the circuit board, it can reduce the space occupied by the circuit board assembly at the head of the battery, which is beneficial to improving the energy density of the battery.

[0006] In some embodiments of this application, at least one first substrate includes a first PCB board, a first electronic component, and an injection molding portion. The first PCB board is connected to the first circuit board. The injection molding portion covers the side of the first PCB board away from the first circuit board. The first electronic component is located within the injection molding portion and is electrically connected to the first PCB board. The first substrate can improve the structural strength of the part where the first circuit board is connected to the tab, and the first substrate is configured to form a protection circuit for protecting the battery cell.

[0007] In some embodiments of the present application, at least one first substrate includes a reinforcing member, and the reinforcing member is arranged along a second direction and connected to the first circuit board to improve the structural strength of the portion where the first circuit board is connected to the tab.

[0008] In some embodiments of the present application, the circuit board assembly includes two connecting members, and the two connecting members are connected to the first circuit board and arranged at intervals along a third direction. When observed along the second direction, one connecting member overlaps with one tab and is connected to the tab. The first substrate and the connecting member that overlap with the same tab are respectively arranged on two surfaces of the first circuit board, so as to facilitate improving the structural strength of the portion of the first circuit board where the connecting member is provided through the first substrate, and further facilitate improving the structural strength of the portion where the first circuit board is connected to the tab through the first substrate.

[0009] In some embodiments of the present application, along the second direction, the first substrate is arranged on the surface of the first circuit board close to the bending portion, and the connecting member is arranged on the surface of the first circuit board away from the bending portion, which is beneficial to improving the connection stability between the connecting member and the tab.

[0010] In some embodiments of the present application, the battery includes tab glue, the tab extends from the tab glue, and the tab glue includes an inner portion and an outer portion. The inner portion is located inside the top seal portion, and the outer portion is located outside the top seal portion. The first circuit board includes a first part and two second parts, and the two second parts are connected to both ends of the first part along the third direction. One second part is connected to one first substrate. When observed along the second direction, the first part is located between two tab glues, and the first part does not overlap with the first substrate.

[0011] In some embodiments of the present application, the tab glue includes two first edges arranged opposite to each other along the third direction. When observed along the second direction, the first substrate is located between the two first edges of the corresponding tab glue to reduce the space waste caused by the first substrate being too long in the third direction.

[0012] In some embodiments of the present application, the first circuit board includes a third part, and the third part is connected to the second part and extends along a direction away from the top wall. The circuit board assembly includes a connector, and the connector is connected to the third part, and the connector is used for connecting to an external circuit.

[0013] In some embodiments of the present application, the battery includes a first protection device, and the first protection device and the connector are respectively connected to two surfaces of the third part, and when observed along the first direction, the first protection device and the connector overlap. The first protection device is configured to form a protection circuit for protecting the battery cell, and when the connector extends into the main board compartment of the terminal device and is connected to the main board of the terminal device, the first protection device can utilize the space in the main board compartment of the terminal device, which is beneficial to improving the energy density of the battery.

[0014] In some embodiments of the present application, the first part is provided with a first concave portion that is recessed toward the bent portion. The first concave portion can reduce the space occupied by the part of the circuit board assembly between the two tab ears at the head of the battery, which is beneficial to improving the energy density of the battery.

[0015] In some embodiments of the present application, the bent portion includes a first region located between two tab ear adhesives along the third direction. The first region includes a second concave portion and two body portions. The two body portions are arranged at both ends of the second concave portion along the third direction, and each body portion is provided with a tab ear adhesive at one end away from the second concave portion. When observing along the second direction, the first concave portion overlaps with the second concave portion to reduce the risk of interference between the first concave portion and the bent portion.

[0016] In some embodiments of the present application, along the second direction, the distance between the body portion and the top wall is D 4 , and the distance between the bottom of the second concave portion close to the top wall and the top wall is D 5 , 0mm < D 4 -D 5 ≤0.3mm to reduce the risk of interference between the second concave portion being overly recessed and the top wall.

[0017] In some embodiments of the present application, the circuit board assembly includes a second protection device. The second protection device is connected to the first concave portion. When observing along the third direction, the second protection device overlaps with the tab ear. The second protection device is configured to form a protection circuit for protecting the battery cell. Sharing the space in the second direction between the second protection device and the tab ear is beneficial to improving the energy density of the battery.

[0018] The embodiments of the present application further provide a terminal device, which includes any one of the batteries in the above embodiments.

[0019] In the above battery and terminal device, when observing along the second direction, the two first substrates are arranged at intervals along the third direction. One first substrate overlaps with one tab ear, and one first substrate and one tab ear are respectively connected to opposite sides of the first circuit board. The first substrate can improve the structural strength of the part where the first circuit board is connected to the tab ear. Compared with the existing method of arranging a whole reinforcing plate on one side of the circuit board, it can reduce the space occupied by the circuit board assembly at the head of the battery, which is beneficial to improving the energy density of the battery.

[0020] The embodiments of the present application further provide a terminal device, which includes a main board, a third protection device, and a battery in one of the above embodiments. The battery is electrically connected to the main board, and the third protection device is arranged on the main board. The third protection device is configured to form a protection circuit for protecting the battery cell to reduce the space waste caused by the large space occupied by the protection device at the head of the battery, which is beneficial to improving the energy density of the battery. Description of the Drawings

[0021] Figure 1It is a schematic structural diagram of a battery in an embodiment of the present application.

[0022] Figure 2 It is a schematic structural diagram of the separation of the battery cell and the circuit board assembly in an embodiment of the present application.

[0023] Figure 3 It is a schematic structural diagram of a first substrate in an embodiment of the present application.

[0024] Figure 4 Is Figure 1 The enlarged structural diagram at position A in

[0025] Figure 5 It is a schematic structural diagram of a connector of a battery in an embodiment of the present application.

[0026] Figure 6 It is a schematic structural diagram of the first recess and the second recess of a battery in an embodiment of the present application.

[0027] Figure 7 Is Figure 6 The enlarged structural diagram at position B in

[0028] Figure 8 It is a schematic structural diagram of a connecting member of a battery in an embodiment of the present application.

[0029] Figure 9 It is a schematic diagram of the first position of the second protection device of a battery in an embodiment of the present application.

[0030] Figure 10 It is a schematic diagram of the second position of the second protection device of a battery in an embodiment of the present application.

[0031] Figure 11 It is a schematic diagram of the third position of the second protection device of a battery in an embodiment of the present application.

[0032] Figure 12 It is a schematic structural diagram of a terminal device in an embodiment of the present application.

[0033] Figure 13 It is a schematic structural diagram of the third protection device of a terminal device in an embodiment of the present application.

[0034] Main element symbol description Batteries 100A, 100B, 100C, 100D Terminal devices 200A, 200B Battery cell 10 Electrode assembly 11 Packaging bag 12 Main body part 12A Top wall 121 The first side wall 122 The encapsulation part 12B The top sealing part 125 The bending part 125A The first area 1251 The second concave part 1252 The main body part 1253 The top sealing extension part 125B The side sealing part 126 The side sealing extension part 126A The convex corner part 127 The tab 13 The circuit board assembly 20 The first circuit board 21 The first part 211 The first concave part 2111 The second part 212 The first protruding part 212A The third part 213 The first section 213A The second section 213B The third section 213C The first substrate 22 The first PCB board 221 The injection molding part 222 The reinforcement part 223 The connecting part 23 The first connecting section 231 The second connecting section 232 The connector 24 The first protection device 25 The second protection device 26 The first sub - part 261 The second sub - part 262 The tab glue 30 The built - in part 31 The external part 32 The first edge 33 The third protection device 40 The housing 91 The battery compartment 911 The main board compartment 912 The main board 92 The first direction X The second direction Z The third direction Y The following specific embodiments will further illustrate the present application in conjunction with the above - mentioned drawings. Specific embodiments

[0035] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0036] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element. When an element is considered to be "disposed" on another element, it can be directly disposed on the other element or there may be an intermediate element. It should be understood that considering the factors of actual processing tolerances, in the technical solutions of the present application, when two elements are arranged in parallel / vertical and in the same direction, there may be a certain angle between the two elements, and the angle between the two elements is allowed to have a tolerance of 0 - ±10%.

[0037] When a value is considered to be "equal" to another value, it means that the two are equal within the set deviation, and the set deviation range is within 10%. That is to say, when at least one of the two values fluctuates within the set deviation range, even if their values are not equal, they are still determined to be approximately equal. When the ratio of a value to another value is "1:1", it means that the two are equal within the set deviation, and the set deviation range is within 10%. That is to say, when at least one of the two values fluctuates within the set deviation range, even if their values are not equal, their ratio is still determined to be equal.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments, and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. The term "overlap" used herein means that when observed in a certain direction, the projection parts of two components overlap or the projections of the two components coincide.

[0039] An embodiment of the present application provides a battery, which includes a battery cell and a circuit board assembly. The battery cell includes an electrode assembly, a packaging bag, and two tab ears. The packaging bag includes a main body portion and a sealing portion. The electrode assembly is disposed within the main body portion. The main body portion includes a top wall, and the sealing portion includes a top sealing portion which is connected to the top wall. The top sealing portion includes a bending portion. When observed in a first direction, the bending portion and the top wall are arranged in a second direction. One end of the tab ear is connected to the electrode assembly, and the other end of the tab ear extends out from the bending portion. The thickness direction of the battery cell is the first direction. The circuit board assembly includes a first circuit board and two first substrates connected to the first circuit board. The first circuit board is located on a side of the bending portion away from the top wall in the second direction. The two tab ears are spaced apart in a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. When observed in the second direction, the two first substrates are spaced apart in the third direction. One first substrate overlaps with one tab ear, and one first substrate and one tab ear are respectively connected to opposite sides of the first circuit board.

[0040] In the above battery, when observed in the second direction, the two first substrates are spaced apart in the third direction. One first substrate overlaps with one tab ear, and one first substrate and one tab ear are respectively connected to opposite sides of the first circuit board. The first substrate can improve the structural strength of the part where the first circuit board is connected to the tab ear. Compared with the existing method of setting a whole reinforcing plate on one side of the circuit board, it can reduce the space occupied by the circuit board assembly at the head of the battery, which is beneficial to improving the energy density of the battery.

[0041] The embodiments of the present application will be further described below with reference to the accompanying drawings.

[0042] Embodiment 1 Please refer to Figure 1 and Figure 2 together. An embodiment of the present application provides a battery 100A. The battery 100A can be, but is not limited to, a secondary battery. A secondary battery refers to a battery that can be activated by charging after discharging so as to be used continuously.

[0043] The battery 100A includes a battery cell 10 and a circuit board assembly 20. The thickness direction of the battery cell 10 is the first direction X, the length direction of the battery cell 10 is the second direction Z, and the width direction of the battery cell 10 is the third direction Y. The first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0044] The battery cell 10 includes an electrode assembly 11, a packaging bag 12, and two tab ears 13. The electrode assembly 11 is used to convert chemical energy into electrical energy. The packaging bag 12 is made of a packaging film by means of punching, folding, and heat sealing. The packaging bag 12 includes a main body portion 12A and a sealing portion 12B. The main body portion 12A is the portion where the punching is made, and the sealing portion 12B is the portion where the packaging film overlaps and is joined.

[0045] The electrode assembly 11 is disposed within the main body portion 12A. The main body portion 12A includes a top wall 121, and the encapsulation portion 12B includes a top encapsulation portion 125 which is connected to the top wall 121. The top encapsulation portion 125 includes a bending portion 125A. When observed along the first direction X, the bending portion 125A and the top wall 121 are arranged along the second direction Z. The top encapsulation portion 125 is bent to reduce the space occupied by the top encapsulation portion 125 in the second direction Z, which is beneficial to improving the energy density of the battery 100A.

[0046] One end of the tab 13 is connected to the electrode assembly 11, and the other end of the tab 13 extends out from the bending portion 125A. The polarities of the two tabs 13 are different to facilitate forming a complete current loop with the circuit board assembly 20.

[0047] The circuit board assembly 20 includes a first circuit board 21 and two first substrates 22 connected to the first circuit board 21. The first circuit board 21 is located on the side of the bending portion 125A away from the top wall 121 along the second direction Z. The two tabs 13 are spaced apart along the third direction Y. When observed along the second direction Z, the two first substrates 22 are spaced apart along the third direction Y. One first substrate 22 overlaps with one tab 13, and one first substrate 22 and one tab 13 are respectively connected to opposite sides of the first circuit board 21.

[0048] The first substrate 22 can improve the structural strength of the portion where the first circuit board 21 is connected to the tab 13. Compared with the existing method of arranging a whole reinforcing plate on one side of the circuit board, it can reduce the space occupied by the circuit board assembly 20 at the head of the battery 100A, which is beneficial to improving the energy density of the battery 100A.

[0049] It should be noted that the head of the battery 100A refers to the position on the side of the top wall 121 away from the electrode assembly 11 along the second direction Z.

[0050] It can be understood that the number of tabs 13 can be 1, 2 or more. Correspondingly, the number of first substrates 22 can be 1, 2 or more.

[0051] In some embodiments, the first circuit board 21 is a flexible printed circuit (abbreviated as FPC), which is a printed circuit made of a flexible insulating substrate and has characteristics such as being bendable, foldable, and twistable.

[0052] Please refer to Figure 1 and Figure 2, in some embodiments, at least one first substrate 22 is a SIP module formed by SIP packaging technology. A SIP module (System in Package) can integrate devices with multiple functions (such as processors, memories, sensors, etc.) in one package. By combining devices with different processes and functions, higher integration and smaller volume can be achieved. The first substrate 22 can improve the structural strength of the part where the first circuit board 21 is connected to the tab 13, and the first substrate 22 is configured to form a protection circuit for protecting the battery cell 10. The first substrate 22 includes a first PCB board 221, first electronic components (not shown in the figure), and an injection molding part 222. The first PCB board 221 is connected to the first circuit board 21. The injection molding part 222 covers the side of the first PCB board 221 away from the first circuit board 21. The first electronic components are located in the injection molding part 222 and are electrically connected to the first PCB board 221. Specifically, the injection molding part 222 first encapsulates the first electronic components to form a SIP module, and then connects the SIP module to the first circuit board 21. The injection molding part 222 is used to protect and dissipate heat from the first electronic components and the first circuit board 21 and improve the overall structural stability of the first substrate 22.

[0053] The configuration of the first electronic components needs to be selected according to the control logic design of the protection circuit. The first electronic components include at least one of a current sensing resistor, a resistor for detecting the temperature of the battery 100A, a transistor for controlling the disconnection of the charge / discharge circuit of the battery 100A, a transient suppression diode for port surge protection, a protection chip for realizing overvoltage, undervoltage, and overcurrent fault detection of the battery 100A, an encryption chip, an ID resistor, and a component integrating IC and MOS functions.

[0054] Please refer to Figure 3 , in some embodiments, at least one first substrate 22 includes a reinforcing member 223. The reinforcing member 223 is made of a rigid material. The reinforcing member 223 and the first circuit board 21 are arranged along the second direction Z and are connected to the first circuit board 21 to improve the structural strength of the part where the first circuit board 21 is connected to the tab 13.

[0055] Optionally, the reinforcing member 223 is connected to the first circuit board 21 by an adhesive or welding. The reinforcing member 223 is a plastic board, a fiberglass board, or a steel plate.

[0056] Optionally, both of the two first substrates 22 are SIP modules; or both of the two first substrates 22 include the reinforcing member 223; or one of the first substrates 22 is a SIP module and the other first substrate 22 includes the reinforcing member 223.

[0057] Please refer to Figure 1 and Figure 2, in some embodiments, the circuit board assembly 20 includes two connecting members 23, and the two connecting members 23 are connected to the first circuit board 21 and are spaced apart along the third direction Y. When observing along the second direction Z, one connecting member 23 overlaps with one tab 13 and is connected to the tab 13. The first substrate 22 and the connecting member 23 that overlap with the same tab 13 are respectively disposed on two opposite surfaces of the first circuit board 21 along the second direction Z, so as to facilitate improving the structural strength of the portion of the first circuit board 21 where the connecting member 23 is provided through the first substrate 22, and further facilitate improving the structural strength of the portion where the first circuit board 21 is connected to the tab 13 through the first substrate 22.

[0058] In some embodiments, along the second direction Z, the first substrate 22 is disposed on the surface of the first circuit board 21 close to the bending portion 125A, and the connecting member 23 is disposed on the surface of the first circuit board 21 away from the bending portion 125A, which is beneficial to improving the connection stability between the connecting member 23 and the tab 13.

[0059] It can be understood that, in some embodiments, along the second direction Z, the first substrate 22 is disposed on the surface of the first circuit board 21 away from the bending portion 125A, and the connecting member 23 is disposed on the surface of the first circuit board 21 close to the bending portion 125A.

[0060] In some embodiments, the connecting member 23 is a "U"-shaped connecting piece. The connecting member 23 includes two first connecting segments 231 spaced apart along the second direction Z and a second connecting segment 232 connecting the two first connecting segments 231. One of the first connecting segments 231 is connected to the first circuit board 21, and openings are formed at the ends of the two first connecting segments 231 away from the second connecting segment 232, and the tab 13 extends into the openings and is connected to the other first connecting segment 231 to improve the connection stability between the connecting member 23 and the tab 13.

[0061] In some embodiments, along the third direction Y, the size of the first connecting segment 231 is larger than the size of the second connecting segment 232, which is beneficial to bending the second connecting segment 232 to form a "U"-shaped structure.

[0062] It can be understood that, in some embodiments, the connecting member 23 is an "L"-shaped connecting piece, that is, the corresponding connecting piece can also achieve the above electrical connection relationship through one-time bending.

[0063] It can be understood that, in some embodiments, the connecting member 23 is a flat nickel block.

[0064] Please refer to Figure 1 and Figure 4 , in some embodiments, along the third direction Y, the edge of the connecting member 23 is located outside the edge of the tab 13, and the distance between the edge of the connecting member 23 and the edge of the corresponding tab 13 is D 1 , 0mm < D1 ≤2 mm, so as to facilitate increasing the connection area between the connecting member 23 and the tab 13, thereby improving the connection stability between the connecting member 23 and the tab 13.

[0065] It should be noted that D 1 is measured in the following way. Select 3 measurement points on one edge of the first connection segment 231 along the third direction Y, measure the distance values in the third direction Y between each measurement point and the corresponding edge of the tab 13, and calculate the average value of the 3 distance values. The average value is D 1 .

[0066] Optionally, D 1 is one of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, and any other value within the range of 0 mm < D 1 ≤2 mm.

[0067] Please refer to Figure 4 , in some embodiments, along the third direction Y, the distance between the edge of the first substrate 22 and the edge of the connecting member 23 on the same side of the tab 13 is D 2 , 0 mm ≤ D 2 ≤5 mm, so as to reduce the risk of excessive positional deviation between the first substrate 22 and the connecting member 23, thereby improving the support stability of the part of the first circuit board 21 where the connecting member 23 is provided by the first substrate 22. Among them, along the third direction Y, the edge of the first substrate 22 is located outside the edge of the connecting member 23, or the edge of the connecting member 23 is located outside the edge of the first substrate 22, or the edge of the first substrate 22 is flush with the edge of the connecting member 23.

[0068] It should be noted that D 2 is measured in the following way. Select 3 measurement points on one edge of the first connection segment 231 along the third direction Y, measure the distance values in the third direction Y between each measurement point and the corresponding edge of the first substrate 22, and calculate the average value of the 3 distance values. The average value is D 2 .

[0069] Optionally, D 2 is one of 0 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, and any other value within the range of 0 mm ≤ D 2 ≤5 mm.

[0070] Please refer to Figure 2, in some embodiments, along the first direction X, the edge of the first substrate 22 is located outside the edge of the first circuit board 21, and the distance between the edge of the first substrate 22 and the corresponding edge of the first circuit board 21 is D 3 , 0 mm < D 3 ≤ 0.5 mm, so as to improve the support stability of the part of the first circuit board 21 where the connecting member 23 is provided by the first substrate 22, and reduce the space waste caused by the excessive protrusion of the first substrate 22 in the first direction X.

[0071] It should be noted that D 3 is measured in the following way. Select 3 measurement points on one edge of the first substrate 22 along the first direction X, measure the distance values between each measurement point and the corresponding edge of the first circuit board 21 in the first direction X, and calculate the average value of the 3 distance values. The average value is D 3 .

[0072] Optionally, D 3 is one of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm and any other arbitrary value within the range of 0 mm < D 3 ≤ 0.5 mm.

[0073] Please refer to Figure 1 and Figure 2 , in some embodiments, the battery 100A includes a tab glue 30, and the tab 13 extends from the tab glue 30. The tab glue 30 includes an inner part 31 and an outer part 32. The inner part 31 is located inside the top sealing part 125, and the outer part 32 is located outside the top sealing part 125. The tab glue 30 is used to improve the sealing stability between the tab 13 and the top sealing part 125.

[0074] In some embodiments, the first circuit board 21 includes a first part 211 and two second parts 212. The two second parts 212 are connected to both ends of the first part 211 along the third direction Y. One second part 212 is connected to one first substrate 22. When observing along the second direction Z, the first part 211 is located between the two tab glues 30, and the first part 211 does not overlap with the first substrate 22.

[0075] Please refer to Figure 4 , in some embodiments, the tab glue 30 includes two first edges 33 arranged opposite to each other along the third direction Y. When observing along the second direction Z, the first substrate 22 is located between the two first edges 33 of the corresponding tab glue 30, so as to reduce the space waste caused by the excessive length of the first substrate 22 in the third direction Y.

[0076] Please refer to Figure 1 and Figure 5, in some embodiments, the first circuit board 21 includes a third portion 213. The third portion 213 is connected to the second portion 212 and extends in a direction away from the top wall 121. The circuit board assembly 20 includes a connector 24. The connector 24 is connected to the third portion 213 and is used to connect to an external circuit. The external circuit may be, but is not limited to, the main board of a terminal device powered by a battery 100A. In some embodiments, the first circuit board 21 includes two third portions 213, and one third portion 213 is connected to one second portion 212, which is beneficial to improving the over-current capacity of the circuit board assembly 20.

[0077] It can be understood that, in some embodiments, the first circuit board 21 includes one third portion 213, and one third portion 213 is connected to one of the second portions 212.

[0078] It can be understood that the number of the third portions 213 can be 1, 2, or more.

[0079] It can be understood that the number of the connectors 24 can be 1, 2, or more.

[0080] Please refer to Figure 1 and Figure 5 , in some embodiments, the circuit board assembly 20 includes a first protection device 25. The first protection device 25 and the connector 24 are respectively connected to two surfaces of the third portion 213 that are oppositely arranged along the first direction X, and when observed along the first direction X, the first protection device 25 and the connector 24 overlap. The first protection device 25 is configured to form a protection circuit for protecting the battery cell 10, and when the connector 24 extends into the main board compartment of the terminal device and is connected to the main board of the terminal device, the first protection device 25 can utilize the space in the main board compartment of the terminal device, which is beneficial to improving the energy density of the battery 100A.

[0081] In some embodiments, the first protection device 25 is a SIP module formed by a SIP packaging process.

[0082] It can be understood that the number of the first protection devices 25 can be 0, 1, or more.

[0083] Please refer to Figure 4, in some embodiments, the third part 213 includes a first section 213A, a second section 213B, and a third section 213C. The second section 213B is arranged with the second part 212 along the second direction Z, and the second section 213B is located on the side of the second part 212 along the second direction Z away from the bending part 125A. The first section 213A is connected between the second section 213B and the second part 212 and extends along the second direction Z. The first section 213A and the second section 213B can provide a margin for movement for the third section 213C. The third section 213C extends from the second section 213B in a direction away from the top wall 121. The connector 24 and the first protection device 25 are provided on the third section 213C.

[0084] In some embodiments, when observed along the first direction X, the dimension of the second part 212 along the third direction Y is greater than the dimension of the first substrate 22 along the third direction Y. The second part 212 includes a first protruding portion 212A. The first protruding portion 212A protrudes along the third direction Y from the side of the first substrate 22 away from the first part 211. The first protruding portion 212A is connected to the first section 213A. The first protruding portion 212A is used to provide a movement space for the third part 213, which is beneficial to shortening the distance that needs to be reserved between the bending part of the third part 213 and the convex corner part 127, and improving the space utilization rate of the circuit board assembly 20 at the head of the battery 100A.

[0085] Please refer to Figure 1 and Figure 2 , in some embodiments, the main body part 12A includes two first side walls 122 connected to both sides of the top wall 121 along the third direction Y. The encapsulation part 12B includes two side encapsulation parts 126, and one side encapsulation part 126 is connected to one first side wall 122. The side encapsulation part 126 is bent towards the first side wall 122. The side encapsulation part 126 includes a side encapsulation extension part 126A protruding along the second direction Z from the top wall 121.

[0086] Along the third direction Y, the top encapsulation part 125 includes two top encapsulation extension parts 125B. The two top encapsulation extension parts 125B are connected to both ends of the bending part 125A along the third direction Y, and the two top encapsulation extension parts 125B protrude along the second direction Z from the bending part 125A. One side encapsulation extension part 126A is connected to one top encapsulation extension part 125B to form a convex corner part 127. When observed along the second direction Z, the circuit board assembly 20 is located between the two convex corner parts 127 in the third direction Y, so that the circuit board assembly 20 and the convex corner part 127 can share the space in the second direction Z, which is beneficial to improving the energy density of the battery 100A.

[0087] Embodiment 2 Please refer to Figure 6, an embodiment of the present application further provides a battery 100B. The difference between the battery 100B and the battery 100A is that the first part 211 is provided with a first concave portion 2111 recessed toward the bending portion 125A. The first concave portion 2111 can reduce the space occupied by the portion of the circuit board assembly 20 between the two ear tabs 13 at the head of the battery 100A, which is beneficial to improving the energy density of the battery 100A.

[0088] In some embodiments, the bending portion 125A includes a first region 1251 located between the two tab adhesives 30 along the third direction Y. The first region 1251 includes a second concave portion 1252 and two body portions 1253. The two body portions 1253 are arranged at both ends of the second concave portion 1252 along the third direction Y, and each body portion 1253 is provided with a tab adhesive 30 at one end away from the second concave portion 1252. Viewed along the second direction Z, the first concave portion 2111 overlaps with the second concave portion 1252 to reduce the risk of interference between the first concave portion 2111 and the bending portion 125A.

[0089] Please refer to Figure 6 and Figure 7 , in some embodiments, along the second direction Z, the distance between the body portion 1253 and the top wall 121 is D 4 , the distance between the bottom of the second concave portion 1252 close to the top wall 121 and the top wall 121 is D 5 , 0mm < D 4 -D 5 ≤0.3mm to reduce the risk of interference between the over-recessed second concave portion 1252 and the top wall 121.

[0090] It should be noted that D 4 is measured in the following way. Select 3 measurement points on the surface of the body portion 1253 facing the top wall 121, measure the distance values between each measurement point and the top wall 121 along the second direction Z, and calculate the average value of the 3 distance values. The average value is D 4 . D 5 is measured in the following way. Select 3 measurement points at the bottom of the second concave portion 1252 close to the top wall 121, measure the distance values between each measurement point and the top wall 121 along the second direction Z, and calculate the average value of the 3 distance values. The average value is D 5 .

[0091] Optionally, D 4 -D 5 is one of 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm and any other arbitrary value within the range of 0mm < D 4 -D 5 ≤0.3mm.

[0092] In some embodiments, the first recess 2111 abuts against the second recess 1252 to further reduce the space occupied by the portion of the circuit board assembly 20 between the two tab ears 13 at the head of the battery 100A, which is beneficial to improving the energy density of the battery 100A.

[0093] In some embodiments, along the second direction Z, the first substrate 22 is disposed on the surface of the first circuit board 21 close to the bending portion 125A, and the connecting member 23 is disposed on the surface of the first circuit board 21 away from the bending portion 125A.

[0094] Please refer to Figure 8 , in some embodiments, along the second direction Z, the first substrate 22 is disposed on the surface of the first circuit board 21 away from the bending portion 125A, and the connecting member 23 is disposed on the surface of the first circuit board 21 close to the bending portion 125A.

[0095] Except for the above differences, the parameters of the battery 100B are substantially the same as those of the battery 100A, and reference can be made to the description of the above battery 100A.

[0096] Embodiment 3 Please refer to Figure 9 , an embodiment of the present application further provides a battery 100C. The difference between the battery 100C and the battery 100B is that the circuit board assembly 20 includes a second protection device 26, the second protection device 26 is connected to the first part 211, and the second protection device 26 is configured to form a protection circuit for protecting the battery cell 10. When observing along the third direction Y, the second protection device 26 overlaps with the tab ear 13, so that the second protection device 26 and the tab ear 13 share the space in the second direction Z, which is beneficial to improving the energy density of the battery 100C.

[0097] In some embodiments, the second protection device 26 is a SIP module formed by the SIP packaging process.

[0098] In some embodiments, along the second direction Z, the first recess 2111 abuts against the second recess 1252, the second protection device 26 is connected to the side of the first recess 2111 away from the bending portion 125A, when observing along the second direction Z, the second protection device 26 overlaps with the second recess 1252, and at least a part of the second protection device 26 is located in the accommodation space formed by the first recess 2111.

[0099] Please refer to Figure 10 , in some embodiments, along the second direction Z, the first recess 2111 and the second recess 1252 are spaced apart, the second protection device 26 is connected to the side of the first recess 2111 facing the bending portion 125A, and when observing along the second direction Z, the second protection device 26 overlaps with the second recess 1252, and the second protection device 26 abuts against the second recess 1252.

[0100] Please refer toFigure 11 , in some embodiments, along the second direction Z, the first recess 2111 and the second recess 1252 are arranged at intervals. The second protection device 26 includes a first sub - part 261 and a second sub - part 262. Along the second direction Z, the first sub - part 261 is connected to the side of the first recess 2111 away from the bending part 125A, and the second sub - part 262 is connected to the side of the first recess 2111 facing the bending part 125A. When observed along the second direction Z, both the first sub - part 261 and the second sub - part 262 overlap with the second recess 1252, and the second sub - part 262 abuts against the second recess 1252.

[0101] Except for the above - mentioned differences, the parameters of the battery 100C are substantially the same as those of the battery 100B. For details, please refer to the description of the battery 100B above.

[0102] Embodiment 4 Please refer to Figure 12 , an embodiment of the present application further provides a terminal device 200A, including the battery (100A, 100B, 100C) in any of the above - mentioned embodiments.

[0103] Optionally, the terminal device 200A may be a mobile phone, a tablet computer, a laptop computer, a smart wearable product (e.g., a smart watch, a smart bracelet), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, or other devices with a rechargeable battery.

[0104] In some embodiments, the terminal device 200A includes a housing 91 and a main board 92. The housing 91 is provided with a battery compartment 911 and a main - board compartment 912. The battery cell 10 is disposed in the battery compartment 911, and the main board 92 is disposed in the main - board compartment 912. The third part 213 extends into the main - board compartment 912, the connector 24 extends into the main - board compartment 912 to be connected to the main board 92, and the first protection device 25 is located in the main - board compartment 912 to reduce the space waste caused by the relatively large space occupied by the protection device at the head of the battery (100A, 100B, 100C).

[0105] In summary, in the above-described batteries (100A, 100B, 100C) and the terminal device 200A, the first circuit board 21 is located on the side of the bent portion 125A away from the top wall 121 along the second direction Z, and the two ear tabs 13 are arranged at intervals along the third direction Y. When observed along the second direction Z, the two first substrates 22 are arranged at intervals along the third direction Y. One first substrate 22 overlaps with one ear tab 13, and one first substrate 22 and one ear tab 13 are respectively connected to opposite sides of the first circuit board 21. The first substrate 22 can improve the structural strength of the portion where the first circuit board 21 is connected to the ear tab 13. Compared with the existing method of arranging a whole reinforcing plate on one side of the circuit board, it can reduce the space occupied by the circuit board assembly 20 at the head of the battery (100A, 100B, 100C), which is beneficial to improving the energy density of the battery (100A, 100B, 100C).

[0106] Embodiment 5 Please refer to Figure 13 , an embodiment of the present application further provides a terminal device 200B, and the terminal device 200B includes a main board 92, a third protection device 40, and a battery 100D.

[0107] The difference between the battery 100D and the battery 100A is that the first protection device 25 of the third part 213 is replaced by a reinforcing plate. The battery 100D is electrically connected to the main board 92, and the third protection device 40 is arranged on the main board 92. The third protection device 40 is configured to form a protection circuit for protecting the battery cell 10, so as to reduce the space waste caused by the relatively large space occupied by the protection device at the head of the battery 100D, which is beneficial to improving the energy density of the battery 100D.

[0108] In some embodiments, the terminal device 200B includes a housing 91. The housing 91 is provided with a battery compartment 911 and a main board compartment 912. The battery cell 10 is arranged in the battery compartment 911, and the main board 92 is arranged in the main board compartment 912. The third part 213 extends into the main board compartment 912, and the connector 24 extends into the main board compartment 912 to be connected to the main board 92.

[0109] In some embodiments, the third protection device 40 is a SIP module formed by the SIP packaging process.

[0110] Except for the above differences, the parameters of the battery 100D are substantially the same as those of the battery 100A, and reference can be made to the description of the above battery 100A.

[0111] In addition, those skilled in the art can also make other changes within the spirit of the present application. Of course, these changes made according to the spirit of the present application should be included in the scope disclosed in the present application.

Claims

1. A battery, characterized in that: The battery comprises: A battery cell, the battery cell comprising an electrode assembly, a packaging bag and two tabs, the packaging bag comprising a main body and a packaging part, the electrode assembly is arranged in the main body, the main body comprises a top wall, the packaging part comprises a top sealing part, the top sealing part is connected to the top wall, the top sealing part comprises a bending part, when viewed along a first direction, the bending part and the top wall are arranged along a second direction, one end of the tab is connected to the electrode assembly, the other end of the tab extends from the bending part, and the thickness direction of the battery cell is the first direction; A circuit board assembly, the circuit board assembly comprising a first circuit board and two first substrates connected to the first circuit board, the first circuit board being located on the side of the bending portion away from the top wall along the second direction, the two pole ears being spaced apart along the third direction, the first direction, the second direction and the third direction being perpendicular to each other, and when observed along the second direction, the two first substrates being spaced apart along the third direction, one of the first substrates overlapping with one of the pole ears, and one of the first substrates and one of the pole ears being respectively connected to opposite sides of the first circuit board.

2. The battery according to claim 1, characterized in that At least one of the first substrates includes a first PCB board, a first electronic component and an injection molding part, wherein the first PCB board is connected to the first circuit board, the injection molding part covers a side of the first PCB board away from the first circuit board, and the first electronic component is located in the injection molding part and is electrically connected to the first PCB board.

3. The battery according to claim 1, characterized in that At least one of the first substrates includes a reinforcing piece, and the reinforcing piece is arranged with the first circuit board along the second direction and connected to the first circuit board.

4. The battery according to claim 1, characterized in that The circuit board assembly includes two connectors, which are connected to the first circuit board and arranged at intervals along the third direction. When viewed along the second direction, one connector overlaps with and is connected to one pole ear, and the first substrate and the connector overlapping the same pole ear are respectively arranged on two surfaces of the first circuit board.

5. The battery according to claim 4, characterized in that Along the second direction, the first substrate is disposed on a surface of the first circuit board close to the bending portion, and the connecting member is disposed on a surface of the first circuit board away from the bending portion.

6. The battery according to claim 1, characterized in that The battery comprises a tab glue, the tab extends from the tab glue, the tab glue comprises an internal part and an external part, the internal part is located inside the top seal part, and the external part is located outside the top seal part; The first circuit board includes a first part and two second parts, the two second parts are connected to two ends of the first part along the third direction, one second part is connected to one first substrate, and when viewed along the second direction, the first part is located between the two tab glues, and the first part does not overlap with the first substrate.

7. The battery according to claim 6, characterized in that The tab glue includes two first edges arranged opposite to each other along a third direction. When viewed along the second direction, the first substrate is located between the two first edges of the corresponding tab glue.

8. The battery according to claim 6, characterized in that The first circuit board includes a third portion, the third portion is connected to the second portion and extends in a direction away from the top wall; The circuit board assembly includes a connector connected to the third portion.

9. The battery according to claim 8, characterized in that The battery includes a first protection device, the first protection device and the connector are respectively connected to two surfaces of the third portion, and when viewed along the first direction, the first protection device overlaps with the connector.

10. The battery according to claim 6, characterized in that The first portion is provided with a first recessed portion recessed toward the bending portion.

11. The battery according to claim 10, characterized in that The bending portion includes a first area located between the two tab glues along the third direction; The first area includes a second concave portion and two main body portions, the two main body portions are arranged at two ends of the second concave portion along the third direction, and one end of each main body portion away from the second concave portion is provided with a tab glue; Viewed along the second direction, the first recess overlaps with the second recess.

12. The battery according to claim 11, characterized in that Along the second direction, the distance between the main body and the top wall is D4, the distance between the bottom of the second recessed portion close to the top wall and the top wall is D5, and 0mm<D4-D5≤0.3mm.

13. The battery according to claim 11 or 12, characterized in that: The circuit board assembly includes a second protection device connected to the first recess, and the second protection device overlaps with the tab when viewed along the third direction.

14. A terminal device, characterized in that: The terminal device comprises the battery according to any one of claims 1 to 13.

15. A terminal device, characterized in that: The terminal device comprises a mainboard, a third protection device and the battery as claimed in claim 1, wherein the battery is electrically connected to the mainboard, and the third protection device is arranged on the mainboard.

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