CN212303758U

CN212303758U - Battery pack and mobile terminal

Info

Publication number: CN212303758U
Application number: CN202021842752.XU
Authority: CN
Inventors: 高锃
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-01-05
Anticipated expiration: 2030-08-28

Abstract

The present disclosure relates to a battery assembly and a mobile terminal, the battery assembly includes a battery body, a receiving area is formed on the battery body; the tabs are arranged on the battery body and comprise N first tabs and one or more second tabs; and the protection plate comprises N first protection plates, wherein N is an integer greater than or equal to 2, the N first protection plates are connected with the N first tabs in a one-to-one correspondence mode, and the N first protection plates are folded and attached to the containing area through the N first tabs. The embodiment of this disclosure is through being connected a plurality of utmost point ears and a plurality of protection shields one-to-one to with the folding laminating of a plurality of protection shields in the accommodation region of battery body, can effectively reduce the protection plate size, can guarantee the ability of overflowing of protection shield, can reduce battery pack's occupation space again, effectively promote the capacity of battery.

Description

Battery pack and mobile terminal

Technical Field

The present disclosure relates to the field of battery technologies, and in particular, to a battery module and a mobile terminal.

Background

With the increasingly higher configuration of mobile terminals such as mobile phones and tablet computers, the power consumption is increasingly higher, and the requirements on the battery capacity and the battery charging speed are also increasingly higher. Rapid charging techniques for large currents are thus rapidly evolving. However, as the charging current increases, the size of the battery protection plate inevitably increases accordingly, resulting in a reduction in the effective size of the battery, limiting the increase in the battery capacity.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a battery pack and a mobile terminal.

According to a first aspect of the embodiments of the present disclosure, there is provided a battery assembly including a battery body having a receiving region formed thereon; the tabs are arranged on the battery body and comprise N first tabs and one or more second tabs; and the protection plate comprises N first protection plates, wherein N is an integer greater than or equal to 2, the N first protection plates are connected with the N first tabs in a one-to-one correspondence mode, and the N first protection plates are folded and attached to the containing area through the N first tabs.

In one embodiment of the present disclosure, the first protective plate is a hard plate; the protection shield still includes the soft board, and N first protection shields are connected to the soft board.

In an embodiment of the present disclosure, the protection plate further comprises a second protection plate; the second protection board is connected with the second pole lug and the soft board.

In one embodiment of the present disclosure, the N first protection plates are connected to the second pole ear.

In an embodiment of the disclosure, the folded N first protection plates are overlapped along a thickness direction of the battery body, and an insulating layer is disposed between overlapping regions of every two adjacent first protection plates.

In an embodiment of the present disclosure, one or more protection circuits are disposed on the N first protection plates and/or the second protection plate.

In an embodiment of the present disclosure, the second protection plate has a width greater than that of the first protection plate.

In one embodiment of the present disclosure, the receiving region is formed on a battery peak of the battery body, the thickness of the battery peak being less than the thickness of the battery body; the pole ear is led out from the battery peak.

In an embodiment of the present disclosure, the receiving region includes a first receiving region and a second receiving region along a thickness direction of the battery body; the first containing area is positioned on the front surface of one end of the battery body close to the pole lug, and the second containing area is positioned on the back surface of one end of the battery body close to the pole lug.

In an embodiment of the present disclosure, the protection plates are integrated flexible plates, and the N first protection plates are branches of the flexible plates.

In an embodiment of the present disclosure, when the number of the second tabs is smaller than the number of the first tabs, the width of the first tabs is smaller than or equal to the width of the second tabs, and/or the thickness of the first tabs is smaller than or equal to the thickness of the second tabs.

According to a second aspect of embodiments of the present disclosure, there is provided a mobile terminal comprising a battery assembly as in any one of the above embodiments.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

through being connected a plurality of utmost point ears and a plurality of protection shields one-to-one to folding laminating a plurality of protection shields is in the accommodation area of battery body, can effectively reduce the protection plate size, can guarantee the ability of overflowing of protection shield, can reduce battery pack's occupation space again, effectively promotes the capacity of battery.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating a battery assembly according to an exemplary embodiment.

Fig. 2 is a schematic diagram of a battery body according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

Fig. 5 is a schematic view illustrating a protection plate of a battery pack according to an exemplary embodiment.

Fig. 6 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

Fig. 7 is a schematic diagram illustrating a battery assembly according to an exemplary embodiment.

Fig. 8 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

Fig. 9 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

Fig. 10 is a schematic view illustrating a protection plate of a battery pack according to an exemplary embodiment.

Fig. 11 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

With the development of mobile terminals such as mobile phones and tablet computers toward being lighter and thinner, built-in batteries are generally used to maximize the battery capacity in a limited space. The built-in battery generally includes a battery body and a battery protection plate. The battery protection board is an Integrated Circuit board, and includes a control Integrated Circuit (IC), a Metal Oxide Semiconductor Field Effect Transistor (MOS Transistor), a precision resistor, and the like, and is used to provide overcharge protection, overdischarge protection, overcurrent protection, short Circuit protection, and the like for a battery.

In the related art, in order to meet the requirement of high-current charging of a high-power battery, the overcurrent capacity of a battery protection board is often increased by increasing the size of the battery protection board. However, the increase in size of the battery protection plate leads to a reduction in the space occupied by the battery cells within the battery, which in turn leads to a reduction in the effective size of the battery and a reduction in the capacity of the battery.

Since the Printed Circuit Boards (PCBs) of the battery protection board are mainly composed of a plurality of copper-clad sheets. In the related art, the overcurrent capacity of the battery protection board is also increased by increasing the number of copper sheets. However, increasing the number of copper layers in a printed circuit board increases the complexity of the process and the manufacturing cost.

In order to solve the problem of the related art that the capacity of a battery is reduced due to the fact that the overcurrent capacity of a battery protection plate is increased by increasing the size of the battery protection plate, the embodiment of the disclosure provides a battery assembly.

Fig. 1 is a schematic diagram illustrating a battery assembly according to an exemplary embodiment. Fig. 2 is a schematic diagram of a battery body according to an exemplary embodiment. Fig. 3 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment. Fig. 4 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment. Fig. 5 is a schematic view illustrating a protection plate of a battery pack according to an exemplary embodiment. Fig. 6 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

As shown in fig. 1, a battery assembly 100 provided by the embodiment of the present disclosure includes a battery body 10, a tab, and a protective plate 20. The battery body 10 is formed with a receiving region 111. The tabs are disposed on the battery body 10 and include N first tabs 121 and one or more second tabs 122. The protection plate 20 includes N first protection plates (e.g., a first protection plate 21a, a first protection plate 21b), where N is an integer equal to or greater than 2. The N first protection plates are connected to the N first tabs 121 (e.g., the first tabs 121a and the first tabs 121b) in a one-to-one correspondence. The N first protection plates are folded and attached to the receiving area 111 through the N first tabs 121. The battery body 10 is an energy storage unit in the battery assembly 100, and is manufactured by processes of lamination, winding, sealing, welding, formation, packaging, and the like, such as a common lithium ion battery. The battery body 10 is a flat battery to satisfy the light and thin requirements of mobile terminals such as mobile phones and computers. As shown in fig. 1 and 2, the x direction is the width direction of the battery body 10, the y direction is the length direction of the battery body 10, and the z direction is the thickness direction of the battery body 10. However, the present disclosure is not limited thereto, and the battery body 10 may also have other shapes such as a rectangular parallelepiped, a cylinder, etc., having a large thickness according to the application thereof.

In the embodiment of the present disclosure, as shown in fig. 2, the battery body 10 is formed with a receiving region 111. The receiving region 111 may be punched out of a battery protection layer such as an aluminum plastic film having good barrier properties, puncture resistance, electrolyte resistance, and punching properties. The receiving region 111 may provide an arrangement space for the protection plate 20.

In the embodiment of the present disclosure, as shown in fig. 3, the tab is disposed on the battery body 10 and electrically connected to the electrode inside the battery body 10. The tabs include N first tabs 121 (e.g., a first tab 121a, a first tab 121b) and one or more second tabs 122, where N is an integer greater than or equal to 2. The first tab 121 and the second tab 122 may be positive or negative tabs, which have opposite polarities. The first tab 121 and the second tab 122 may be made of a nickel metal sheet, and may be bent.

In the embodiment of the present disclosure, the protection plate 20 is connected between the first tab 121 and the second tab 122. The protection plate 20 is provided with electronic devices such as a control integrated circuit, a MOS transistor, a precision resistor, a switch, and the like, so as to provide protection for the battery such as overcharge, overdischarge, overcurrent, short circuit protection, and the like, and a short circuit does not occur between the positive electrode and the negative electrode in the battery body. The protective plate 20 includes N first protective plates (e.g., a first protective plate 21a, a first protective plate 21b), where N is an integer equal to or greater than 2. The N first protection plates are connected with the N first tabs 121 in a one-to-one correspondence manner. By bending the first tab 121 and the second tab 122, the N first protection plates are folded and attached to the receiving area 111.

In the embodiment of the present disclosure, a plurality of first protection plates and first tabs 121 corresponding to each other are provided, and by bending the first tabs 121, the plurality of first protection plates are folded and attached to the accommodation area 111 of the battery body 10, so that the size of the protection plate 20 can be effectively reduced, and therefore, the occupied space of the battery assembly 100 in mobile terminals such as mobile phones and computers is reduced, and the capacity of the battery is effectively increased.

In one embodiment, as shown in fig. 1 and 2, the battery body 10 includes a battery peak 11, and the receiving region 111 is formed on the battery peak 11 of the battery body 10, the thickness of the battery peak 11 being smaller than the thickness of the battery body 10. The housing region 111 may be formed on one surface of the battery top 11 or on both surfaces of the battery top 11 along the thickness direction (z direction) of the battery body 10. However, the present disclosure is not limited thereto, and the receiving region 111 may be formed at other positions of the battery body 10.

In one embodiment, the tab may be led out from the battery peak 11 of the battery body 10. As shown in fig. 3, two first tabs 121 and one second tab 122 are led out from the battery peak 11. The two first tabs 121 are respectively a first tab 121a and a first tab 121 b. The first tab 121a and the first tab 121b have the same polarity, that is, the first tab 121a and the first tab 121b are both connected to the positive electrode of the battery body 10, or both connected to the negative electrode of the battery body 10.

The first tab 121 and the second tab 122 have different polarities. When the first tab 121a and the first tab 121b are both positive electrode tabs, the second tab 122 is a negative electrode tab. When the first tab 121a and the first tab 121b are both negative electrode tabs, the second tab 122 is a positive electrode tab. That is, in the present embodiment, any one of the positive electrode tab and the negative electrode tab is divided into two to form two divided tabs, and the positive electrode tab-the negative electrode tab or the positive electrode tab-the negative electrode tab is formed.

When the number of the second tabs 122 is less than that of the first tabs 121, the width of the first tabs 121 is less than or equal to that of the second tabs 122, and/or the thickness of the first tabs 121 is less than or equal to that of the second tabs 122.

In the present embodiment, the current flowing through the second tab 122 is the sum of the currents respectively flowing through the first tab 121a and the first tab 121 b. Therefore, the current capacity of the single first tab 121a and the single first tab 121b may be less than that of the second tab 122. Accordingly, the width and/or thickness of the first tab 121a and the first tab 121b may be appropriately reduced as compared to the second tab 122 to facilitate bending of the first tab 121a and the first tab 121b, thereby facilitating folding attachment of the protection plate 20 attached to the first tab 121a and the first tab 121b to the receiving region 111.

As shown in fig. 3, the first tab 121a, the first tab 121b, and the second tab 122 are arranged along the width direction (x direction) of the battery body 10. However, the present disclosure is not limited thereto, and for example, the first tab 121a and the first tab 121b may also be arranged in the thickness direction (z direction) of the battery body 10. In addition to the first tab 121a, the first tab 121b and the second tab 122, the battery body 10 may further include more tabs according to actual requirements.

The first tab 121a, the first tab 121b and the second tab 122 may be metal nickel plates, and are connected with the electrodes inside the battery body 10 by laser welding, ultrasonic welding, or the like.

In one embodiment, the first protection plate is a hard plate, and the protection plate 20 further includes a soft plate 24, wherein the soft plate 24 connects the N first protection plates. The first protection sheet can be folded with respect to each other by bending the flexible sheet 24, the first tab 121 and the second tab 122.

In one embodiment, as shown in fig. 1 to 6, the protection plate 20 includes two first protection plates, one second protection plate 22, and one soft plate 24. The two first protection plates are a first protection plate 21a and a first protection plate 21b, respectively.

The connection relationship of the first protection plate 21a, the first protection plate 21b, the second protection plate 22 and the soft plate 24 is as follows: one end of the first protection plate 21a is connected to the first tab 121a, and the other end is connected to the flexible board 24. One end of the first protection plate 21b is connected to the first tab 121b, and the other end is connected to the flexible board 24. The second protective plate 22 is connected to the flexible plate 24 and the second tab 122.

The first protective plate 21a and the first protective plate 21b overlap along the thickness direction (z direction) of the battery body 10, and an insulating layer is provided between the overlapping regions of the first protective plate 21a and the first protective plate 21 b. The insulating layer is used for isolating the first protection plate 21a from the first protection plate 21b and preventing the conduction of the line between the two. The insulating layer can be insulating paper, an insulating film, an insulating glue layer and the like. When the number of the first protection plates is N, the folded N first protection plates are overlapped along the thickness direction of the battery body 10, and an insulating layer is disposed between the overlapping regions of every two adjacent first protection plates. The second protective sheet 22 is folded and attached to the housing region 111 side by side with the first protective sheet 21a and the first protective sheet 21b overlapped along the width direction (x direction) of the battery body 10.

In the above embodiment, one ends of the

first protection plates

21a and 21b are connected to the first tab 121a and the first tab 121b, respectively, but the present disclosure is not limited thereto. In an embodiment, the first protection plate 21a and the first protection plate 21b may be connected to the first tab 121a and the first tab 121b, respectively, at positions other than the end portions. The connection position is related to the positions of the first tab 121a and the first tab 121b on the battery body 10, the lengths of the first protection plate 21a and the first protection plate 21b, the circuit arrangement on the first protection plate 21a and the first protection plate 21b, and the like.

In the above embodiment, the other ends of the first protection plate 21a and the first protection plate 21b are respectively connected to the flexible board 24, but the present disclosure is not limited thereto. In an embodiment, the first protection plate 21a and the first protection plate 21b may be connected to the flexible board 24 at other positions except for the end portions.

In the above-described embodiment, one end of the second protection plate 22 is connected to the soft plate 24, and the other end of the second protection plate 22 is connected to the second pole ear 122, but the present disclosure is not limited thereto. Second tab 122 may be attached at other locations on second protective plate 22 in addition to being attached at the ends of second protective plate 22. The attachment position is related to the position of the second tab 122 on the battery body 10, the length of the second protective plate 22, the circuit arrangement on the second protective plate 22, and the like.

In the embodiment of the present disclosure, the first protection plate 21a, the first protection plate 21b, and the second protection plate 22 are Printed Circuit Boards (PCBs). The first protective plate 21a, the first protective plate 21b, and the second protective plate 22 may be single-sided plates or double-sided plates.

The flexible board 24 is a flexible printed circuit board. A Flexible Printed Circuit (FPC) is a highly reliable and highly Flexible Printed Circuit board made of a polyimide or polyester film as a base material. The flexible cable can be freely bent, wound and folded, can be randomly arranged according to the space layout requirement, can be randomly moved and stretched in a three-dimensional space, and can bear millions of dynamic bending without damaging a lead. Therefore, the protection plate 20 can be folded by bending the soft plate 24.

The first protection plate 21a, the first protection plate 21b, the second protection plate 22 and the flexible board 24 may be connected by welding, or may be a rigid-flexible circuit board in which the flexible board 24 is integrated with the first protection plate 21a, the first protection plate 21b and the second protection plate 22.

In the embodiment of the present disclosure, more than one protection circuit is disposed on the N first protection plates and the second protection plate 22. For example, the first protection board 21a and the first protection board 21b are respectively provided with a first protection circuit. A second protection circuit is provided on second protection plate 22. The first protection circuit and the second protection circuit may include electronic devices such as a control integrated circuit, a MOS transistor, and a precision resistor, and provide protection for the battery assembly 100 against overcharge, overdischarge, overcurrent, and short circuit. The electronic devices may be located on one side of the first protective sheet 21a, the first protective sheet 21b, and the second protective sheet 22, or may be located on both sides of the first protective sheet 21a, the first protective sheet 21b, and the second protective sheet 22, depending on the size, heat generation, and the like of the first protective sheet 21a, the first protective sheet 21b, and the second protective sheet 22. The first protection circuit and the second protection circuit may be the same or different.

In the embodiment of the present disclosure, the widths of the

first protection plates

21a and 21b are in the range of 2.5mm to 6mm, depending on the battery performance itself, the installation space of the battery assembly 100, the battery charging current, and the like. The widths of the first protection plate 21a and the first protection plate 21b may be the same or different.

The lengths of the first protection plate 21a and the first protection plate 21b are in the range of 20mm to 60mm, and the lengths of the first protection plate 21a and the first protection plate 21b may be the same or different depending on the battery performance, the width of the battery body 10, the battery charging current, and the like.

The thickness of the first protective sheet 21a and the first protective sheet 21b is in the range of 0.5mm to 2 mm. The sum of the thicknesses of the first protective plate 21a and the first protective plate 21b is less than or equal to the depth of the receiving region 111 in the thickness direction (z direction) of the battery body 10.

Since the current flowing through the second protection plate 22 is the sum of the currents respectively flowing through the first protection plate 21a and the first protection plate 21 b. Therefore, the overcurrent capability of the second protective sheet 22 is required to be higher than that of the first protective sheet 21a and the first protective sheet 21 b. In order to secure the overcurrent capability of the second protection plate 22, the width of the second protection plate 22 may be made larger than the widths of the first protection plate 21a and the first protection plate 21b, or the number of copper sheets in the second protection plate 22 may be made larger than the number of copper sheets in the first protection plate 21a and the first protection plate 21 b. In consideration of the process complexity and cost increase caused by increasing the number of copper sheets, the width of second protective sheet 22 may be increased appropriately as the installation space allows. Therefore, the width of the second protective sheet 22 is larger than the widths of the first protective sheet 21a and the first protective sheet 21b, and is in the range of 4mm to 8mm, and the specific value is determined depending on the battery performance, the installation space of the battery assembly 100, the battery charging current, and the like.

The second protection plate 22 of the protection plate 20 is further connected to a flexible circuit board 25 for electrically connecting the battery pack 100 to a main board of a mobile terminal such as a mobile phone or a tablet computer.

In the embodiment of the present disclosure, as shown in fig. 1, the first protective plate 21a and the first protective plate 21b overlap in the thickness direction (z direction) of the battery body 10. The overlapped first protection sheet 21a and first protection sheet 21b are folded and attached in the accommodation area 111. The second protection sheet 22 is folded and attached to the accommodation region 111. The second protective sheet 22 is folded and attached to the housing region 111 side by side with the first protective sheet 21a and the first protective sheet 21b overlapped along the width direction (x direction) of the battery body 10. A first protection circuit is provided on the first protection plate 21a and the first protection plate 21b, respectively, and a second protection circuit is provided on the second protection plate 22.

The overlapping first protection plate 21a and the first protection plate 21b have a much reduced width compared to a conventional single protection plate, and can reduce the space occupied by the battery pack 100 in a mobile terminal such as a mobile phone or a computer. The space left by the width reduction of the protection plate 20 can be allocated to terminal internal components such as cameras, local avoidance is realized, and the limited terminal internal space can be effectively utilized. Under the same installation space, the capacity of the battery is effectively improved.

Generally, in order to ensure the safety and reliability of the battery, two sets of protection circuits are formed on the battery protection board. When one set of protection circuit fails and loses protection, the other set of protection circuit starts to work to increase the safety performance of the battery.

In the embodiment of the present disclosure, a first protection circuit is provided on the first protection plate 21a and the first protection plate 21b, and a second protection circuit is provided on the second protection plate 22. Two sets of protection circuits, namely, a first protection circuit and a second protection circuit, are included in a current path formed by the first protection plate 21a and the second protection plate 22. Two sets of protection circuits, namely, a first protection circuit and a second protection circuit, are also included in the current path formed by the first protection plate 21b and the second protection plate 22. Thereby ensuring safety and reliability of the battery assembly 100.

In folding and attaching the protective plate 20 to the battery body 10, first, as shown in fig. 3, the first protective plate 21a and the second protective plate 22 may be welded to the first tab 121a and the second tab 122, respectively. Then, the first tab 121a and the second tab 122 are bent outward (z direction and-y direction) 180 ° along the imaginary line a. After the bending, as shown in fig. 4, the first protective plate 21a connected to the first tab 121a and the second protective plate 22 connected to the second tab 122 are folded and attached to the receiving region 111 of the battery peak 11 along with the bending of the first tab 121a and the second tab 122. Next, the flexible sheet 24 is bent inward (in the y direction and the z direction) by 180 ° along the dotted line B, and the first protection sheet 21B is welded to the first tab 121B in a state shown in fig. 4. Finally, the first tab 121b is bent outward (z direction and-y direction) 180 ° along the dotted line a, so that the first protection sheet 21b connected to the first tab 121b is folded and attached to the first protection sheet 21a, and overlaps the first protection sheet 21a, thereby forming the battery assembly 100 shown in fig. 1.

The disclosure is not limited thereto, and in an embodiment, in the process of folding and attaching the protection plate 20 to the battery body 10, the first protection plate 21a, the first protection plate 21b and the second protection plate 22 may be first welded to the first tab 121a, the first tab 121b and the second tab 122, respectively. The welded state is shown in fig. 6, in which the first protective plate 21a and the first protective plate 21b are overlapped in the thickness direction (z direction) of the battery body 10, and the flexible board 24 connects the first protective plate 21a and the first protective plate 21b and is in a bent state. Then, the first tab 121a and the second tab 122 are bent outward (z direction and-y direction) by 180 ° along the imaginary line a, so that the first protection plate 21a connected to the first tab 121a and the second protection plate 22 connected to the second tab 122 are folded and attached to the receiving region 111 of the battery peak 11 along with the bending of the first tab 121a and the second tab 122. Finally, the first tab 121b is bent outward (z direction and-y direction) 180 ° along the dotted line a, so that the first protection sheet 21b connected to the first tab 121b is folded and attached to the first protection sheet 21a, and overlaps the first protection sheet 21a, thereby forming the battery assembly 100 shown in fig. 1.

The present disclosure is not limited thereto, and in an embodiment, in the process of fixing the protection plate 20 to the battery body 10, the first protection plate 21a, the first protection plate 21b and the second protection plate 22 may be first welded to the first tab 121a, the first tab 121b and the second tab 122, respectively. The welded state is shown in fig. 6, in which the first protective plate 21a and the first protective plate 21b are overlapped in the thickness direction (z direction) of the battery body 10, and the flexible board 24 connects the first protective plate 21a and the first protective plate 21b and is in a bent state. Then, the first tab 121a, the first tab 121b and the second tab 122 are bent outward (z direction and-y direction) 180 ° along the imaginary line a, so that the first protective sheet 21a, the first protective sheet 21b and the second protective sheet 22 are simultaneously folded and attached to the receiving region 111 of the battery peak 11, thereby forming the battery assembly 100 shown in fig. 1.

With the protective plate 20 of the embodiment of the present disclosure, it is easy to fold and attach to the battery body 10. Since the first and

second tabs

121 and 122 have a reduced width and/or thickness as compared to conventional tabs, bending is facilitated, thereby further facilitating folding attachment of the protection plate 20 to the battery body 10.

However, the present disclosure is not limited thereto, and in one embodiment, as shown in fig. 2, the receiving region 111 includes a first receiving region 111a and a second receiving region 111b along the thickness direction (z direction) of the battery body 10, the first receiving region 111a is located on the front side of the battery body 10 near one end of the tab, and the second receiving region 111b is located on the back side of the battery body 10 near one end of the tab. When the tab is led out from the battery peak 11, the front surface of the battery body 10 close to one end of the tab, that is, the front surface of the battery peak 11, and the back surface of the battery body 10 close to one end of the tab, that is, the back surface of the battery peak 11. In the present embodiment, the front surface of the cell peak 11 is the surface on the upstream side in the thickness direction (z direction) of the cell body 10. The rear surface of the battery peak 11 is a surface on the downstream side in the thickness direction (z direction) of the battery body 10, and the front surface and the rear surface are opposite surfaces. However, the front and back surfaces are not absolute front and back surfaces, the first receiving region 111a may be located on the back surface of the battery body 10 near one end of the tab, and the second receiving region 111b may be located on the front surface of the battery body 10 near one end of the tab. The first protective sheet 21a and the first protective sheet 21b are folded and attached to the first accommodation region 111a and the second accommodation region 111b, respectively. At this time, the heat dissipation of the heat generating devices on the first protection plate 21a and the first protection plate 21b is facilitated.

Fig. 7 is a schematic diagram illustrating a battery assembly according to an exemplary embodiment. Fig. 8 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment. Fig. 9 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment. Fig. 10 is a schematic view illustrating a protection plate of a battery pack according to an exemplary embodiment. Fig. 11 is a schematic diagram illustrating a process of folding and attaching a protection plate of a battery pack according to an exemplary embodiment.

In one embodiment, as shown in fig. 7 to 11, the protection plate 20 includes a first protection plate 21a, a first protection plate 21b, and a soft plate 24. The connection relationship of the first protection plate 21a, the first protection plate 21b and the flexible board 24 is as follows: the first protection plate 21a is connected to the first tab 121a and the second tab 122, and the first protection plate 21b is connected to the first tab 121b and the second tab 122. The flexible board 24 is connected to one end of the first protection plate 21a and one end of the first protection plate 21 b.

The flexible board 24 of the protection board 20 is further connected to a flexible circuit board 25 for electrically connecting the battery assembly 100 to a main board of a mobile terminal such as a mobile phone and a tablet computer. The flexible board 24 and the flexible circuit board 25 may be an integral flexible circuit board or may be connected together by soldering.

In the embodiment of the present disclosure, as shown in fig. 7, the first protection plate 21a overlaps the first protection plate 21b in the thickness direction (z direction) of the battery body 10. The overlapped first protective sheet 21a and first protective sheet 21b are folded and attached to the housing area 111 of the battery top 11. Two first protection circuits are provided on the first protection plate 21a and the first protection plate 21b, respectively.

In the embodiment of the present disclosure, the first protection plate 21a and the first protection plate 21b, which are overlapped, have a smaller width than a conventional single protection plate, so that the occupied space of the battery assembly 100 in a mobile terminal such as a mobile phone or a computer can be reduced. The space made available by the reduced width of the protective plate 20 can be allocated to other structures in a terminal, such as a camera, for example, to make better use of the space inside the terminal. Alternatively, the space left by the width reduction of the protection plate 20 can be allocated to the battery cell, that is, the volume of the battery cell in the battery assembly 100 is increased, so that the capacity of the battery is effectively increased in the same installation space.

In the present embodiment, as shown in fig. 7, both ends of the flexible board 24 are connected to one ends of the first protection board 21a and the first protection board 21b, respectively. The other ends of the first protection plate 21a and the first protection plate 21b are connected to the first tab 121a and the first tab 121b, respectively. Meanwhile, the first protection plate 21a and the first protection plate 21b are connected to the second pole ear 122.

However, the present disclosure is not limited thereto, and the flexible board 24 may be connected to other positions of the first protection board 21a and the first protection board 21 b. The first tab 121a and the first tab 121b may also be connected to other positions of the first protection plate 21a and the first protection plate 21 b.

The first protection plate 21a and the first protection plate 21b may be connected to the flexible board 24 by welding, or may be a rigid-flexible board in which the first protection plate 21a and the first protection plate 21b are integrated with the flexible board 24. The connection of the first protection plate 21a with the first tab 121a and the second tab 122, and the connection of the first protection plate 21b with the first tab 121b and the second tab 122 may be through laser welding.

In folding and attaching the protective plate 20 to the battery body 10, first, as shown in fig. 8, the first protective plate 21a is welded to the first tab 121a and the second tab 122, and the first protective plate 21b is welded to the second tab 122. Then, the first tab 121a and the second tab 122 are bent outward (z direction and-y direction) by 180 ° along the imaginary line a, so that the first protection sheet 21a is folded and attached to the receiving area 111 of the battery peak 11 along with the bending of the first tab 121a and the second tab 122. Then, the second tab 122 is bent inward (in the z direction and the y direction) by 180 ° along the dotted line B, and the first protection plate 21B is welded to the first tab 121B, as shown in fig. 9. Finally, the first tab 121b and the second tab 122 are bent and bent outward (z direction and-y direction) 180 ° along the dotted line a, so that the first protection sheet 21b connected to the first tab 121b and the second tab 122 is folded and attached to the first protection sheet 21a, and overlaps the first protection sheet 21a, thereby forming the battery assembly 100 shown in fig. 7.

The disclosure is not limited thereto, and in one embodiment, as shown in fig. 11, in the process of folding and attaching the protection plate 20 to the battery body 10, the first protection plate 21a may be first welded to the first tab 121a and the second tab 122, and the first protection plate 21b may be welded to the first tab 121b and the second tab 122. Then, the first tab 121a, the first tab 121b and the second tab 122 are folded outward (z direction and-y direction) 180 ° along the imaginary line a, so that the first protective sheet 21a is folded and attached to the receiving region 111 of the battery peak 11. Finally, the first tab 121B and the second tab 122 are bent inward (in the y direction and the z direction) by 180 ° along the imaginary line B, so that the first protective sheet 21B connected to the first tab 121B and the second tab 122 is folded and attached to the first protective sheet 21a, thereby forming the battery module 100 shown in fig. 7.

In this embodiment, the second protection plate 22 is omitted from the protection plate 20, so that a larger space can be saved and the manufacturing process becomes simpler. However, in order to ensure safety of the battery assembly 100 during use, two first protection circuits need to be respectively provided on the first protection plate 21a and the first protection plate 21 b. Since one more protection circuit is provided, the manufacturing cost is increased compared to the protection board 20 including the second protection board 22.

Considering the foregoing embodiments in general, when the installation space of the battery assembly 100 can meet the installation requirement only by partial clearance, the protection plate 20 including the first protection plate 21a, the first protection plate 21b, the second protection plate 22, and the soft plate 24 may be used. In this case, the requirement can be met, and the cost can be saved. When the installation space of the battery assembly 100 is more limited and the partial clearance cannot satisfy the installation requirement, the protection plate 20 including the first protection plate 21a, the first protection plate 21b, and the soft plate 24 may be used. At this time, although the cost is increased, it is possible to install the battery assembly 100 in a smaller space.

In the foregoing embodiment, the protection plate 20 is a foldable protection plate in which a soft plate is combined with a hard plate, but the present disclosure is not limited thereto. In one embodiment, the protection plate 20 is an integrated flexible plate, and the N first protection plates are branches of the integrated flexible plate. The N first protective sheets are foldably attached to the receiving region 111 of the battery peak 11. The effects of reducing the occupied space of the battery and improving the capacity of the battery can be achieved.

According to a second aspect of the embodiments of the present disclosure, there is provided a mobile terminal 200 including the battery assembly 100 as described in any one of the above embodiments. The mobile terminal can be an electronic device such as a mobile phone, a tablet computer, an electronic reader and an intelligent wearable device.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery assembly, comprising:

a battery body having a receiving region formed thereon;

the tabs are arranged on the battery body and comprise N first tabs and one or more second tabs; and

the protection shield, including a N first protection shield, N is more than or equal to 2's integer, N first protection shield and N first utmost point ear one-to-one is connected, and N first protection shield is through N first utmost point ear is folding the laminating and is in it holds region.

2. The battery assembly of claim 1,

the first protection plate is a hard plate;

the protection shield still includes the soft board, the soft board is connected N first protection shield.

3. The battery assembly of claim 2,

the protection plate further comprises a second protection plate;

the second protection plate is connected with the second pole ear and the soft plate.

4. The battery assembly of claim 1,

the N first protection plates are connected with the second pole lug.

5. The battery assembly according to any one of claims 1 to 4,

along the thickness direction of battery body, folded N first protection board overlaps, and every two adjacent be provided with the insulating layer between the overlapping region of first protection board.

6. The battery assembly of claim 3,

more than one protection circuit is arranged on the N first protection plates and/or the second protection plates.

7. The battery assembly of claim 3,

the width of the second protection plate is larger than that of the first protection plate.

8. The battery assembly of claim 1,

the receiving region is formed on a battery peak of the battery body, the thickness of the battery peak being smaller than the thickness of the battery body;

the tab is led out from the battery peak.

9. The battery assembly of claim 1,

the accommodating region includes a first accommodating region and a second accommodating region in a thickness direction of the battery body;

the first containing area is located on the front face of one end, close to the pole lug, of the battery body, and the second containing area is located on the back face of one end, close to the pole lug, of the battery body.

10. The battery assembly of claim 1,

the protection shield is the integrative soft board, and N first protection shield is the branch of soft board.

11. The battery assembly of claim 1,

when the number of the second tabs is smaller than that of the first tabs, the width of the first tabs is smaller than or equal to that of the second tabs, and/or

The thickness of the first tab is less than or equal to that of the second tab.

12. A mobile terminal characterized in that it comprises a battery assembly according to any one of claims 1 to 11.