CN223093037U

CN223093037U - Batteries and Electronics

Info

Publication number: CN223093037U
Application number: CN202421520364.8U
Authority: CN
Inventors: 王锦
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2024-06-28
Filing date: 2024-06-28
Publication date: 2025-07-11
Anticipated expiration: 2034-06-28

Abstract

The present application discloses a battery and an electronic device, belonging to the field of electronic devices. The battery comprises a first circuit board and at least two battery cells, the battery cells have short side walls extending along a first direction and long side walls extending along a second direction, the long side walls of at least two battery cells are arranged relatively spaced apart along the first direction; the first circuit board is arranged between the long side walls spaced apart along the first direction, the first circuit board is electrically connected to the battery cells respectively, and the first direction and the second direction intersect.

Description

Battery and electronic device

Technical Field

The application belongs to the field of electronic equipment, and particularly relates to a battery and electronic equipment.

Background

A battery is provided at the electronic device to power the operation of the electronic device. In order to increase the standby time of the electronic device, a plurality of battery cells are arranged in the battery to increase the capacity of a single battery. Under the condition that the shell of the battery cell is electrified, the contact of the adjacent battery cell can cause short circuit, and the service life of the battery is influenced.

Disclosure of utility model

The embodiment of the application aims to provide electronic equipment, which can solve the technical problem that the service life of a battery is influenced due to short circuit caused by contact of a charged battery core in the related technology.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, an embodiment of the present application provides a battery, including:

The battery cells are provided with short side walls extending along a first direction and long side walls extending along a second direction, and the long side walls of the at least two battery cells are oppositely arranged at intervals along the first direction;

The first circuit board is arranged between the long side walls arranged at intervals along the first direction, and is electrically connected with the battery cells respectively, and the first direction and the second direction are intersected.

In a second aspect, an embodiment of the present application provides an electronic device, including:

a battery as provided in the first aspect;

The second circuit board and the third circuit board are respectively arranged on two opposite sides of the battery along the second direction, and two opposite ends of the first circuit board along the second direction are respectively electrically connected with the second circuit board and the third circuit board;

a third flexible circuit board electrically connecting the second circuit board and the third circuit board;

the charging interface is arranged on the third circuit board and is electrically connected with the first circuit board and the third flexible circuit board through the third circuit board.

In the embodiment provided by the application, compared with the embodiment that the first circuit board is arranged on one side of the short side wall of the battery core along the second direction, the first circuit board is arranged between the battery cores arranged at intervals along the first direction, so that the compactness of the first circuit board and the battery cores is improved, the occupied space of the battery is reduced, and the first circuit board is arranged between the battery cores arranged at intervals along the first direction, so that direct contact between the battery cores is avoided or reduced, short circuit between the battery cores is avoided or reduced, and the service life of the battery is prolonged.

Drawings

Fig. 1 is a schematic plan view of a battery according to an embodiment of the present application;

Fig. 2 is a schematic cross-sectional view of a battery according to an embodiment of the present application;

FIG. 3 is a schematic diagram showing a cross-sectional structure of a battery according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a third cross-sectional structure of a battery according to an embodiment of the present application;

fig. 5 is a schematic plan view of an electronic device according to an embodiment of the present application.

Description of the drawings:

10. 20, a second circuit board, 30, a third circuit board, 40, a first charge management module, 50, a second charge management module, 60, a third flexible circuit board, 1, a shell, 11, a supporting wall, 12, a side wall, 13, a containing groove, 14, a first side, 15 and a second side;

2. The battery cell comprises a battery cell body, a battery cell 22, an electrode terminal 23, an edge sealing part, a first circuit board 3, a first flexible circuit board 31, a first board body 32, a second flexible circuit board 33, an insulating piece 4, a limiting seat 5, a first electric connecting piece 6, a second electric connecting piece 7 and a second electric connecting piece;

X, a first direction, Y, a second direction, Z and a third direction.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present application, fall within the scope of protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The electronic device provided by the embodiment of the application is described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.

As shown in fig. 1 and 2, an embodiment of the present application provides a battery 10, where the battery 10 includes a first circuit board 3 and at least two electric cells 2, the electric cells 2 have short side walls L1 extending along a first direction X and long side walls L2 extending along a second direction Y, the long side walls L2 of the at least two electric cells are disposed at opposite intervals along the first direction X, the first circuit board 3 is disposed between the electric cells 2 disposed at intervals along the first direction X, and the first circuit board 3 is electrically connected to the electric cells 2, respectively.

One or more patterned conductive layers may be disposed on the first circuit board 3, and a dielectric layer is disposed between adjacent conductive layers, where different conductive layers may be connected by vias penetrating through the dielectric layer. A power protection circuit may be disposed on the first circuit board 3, and the power protection circuit is used to protect the battery cell 2 from being over-charged, over-current, and the like. The plurality of battery cells 2 connected to the first circuit board 3 are controlled through the first circuit board 3, so that the overcharge and overdischarge of the battery cells 2 are avoided or reduced, and the performance, the service life and the safety of the battery cells 2 are improved. Alternatively, the first direction X is the thickness direction of the first circuit board 3.

The battery cell 2 can store and provide electric energy. The short side wall L1 of the cell 2 has a length smaller than the length of the long side wall L2 of the cell 2. The multiple electric cores 2 can be arranged in parallel in pairs along the first direction X, and the first circuit boards 3 are arranged between the electric cores 2 arranged in parallel in pairs, so that the electric cores 2 arranged oppositely along the first direction X are separated by the first circuit boards 3, direct contact between the electric cores is avoided or reduced, and short circuit phenomenon caused by contact between the electric cores is reduced. The first circuit board 3 may include a first surface and a second surface disposed opposite to each other along the first direction X, and at least one first conductive terminal disposed on the first surface and at least one second conductive terminal disposed on the second surface, the first conductive terminal may be electrically connected with one or more cells 2 located at one side of the first circuit board 3, and the second conductive terminal may be electrically connected with one or more cells 2 located at the other side of the first circuit board 3. The plurality of cells 2 connected to the first circuit board 3 may be connected in series, parallel or series-parallel to form a whole through which the charge and discharge are performed, wherein series-parallel refers to both series connection and parallel connection among the plurality of cells 2. Alternatively, two electric cells 2 are oppositely arranged along the first direction X, and the first circuit board 3 is arranged between the two electric cells 2, and the two electric cells 2 are connected in series through the first circuit board 3.

In the embodiment provided by the application, compared with the embodiment that the first circuit board 3 is arranged on one side of the short side wall L1 of the battery cell 2 along the second direction Y, the first circuit board 3 is arranged between the battery cells 2 arranged at intervals along the first direction X, so that the compactness of the first circuit board 3 and the battery cells 2 is improved, the occupied space of the battery 10 is reduced, and the first circuit board 3 is arranged between the battery cells 2 arranged at intervals along the first direction X, so that the direct contact between the battery cells 2 is avoided or reduced, the short circuit between the battery cells 2 is avoided or reduced, and the service life of the battery 10 is prolonged.

In some embodiments, the battery cell 2 includes a battery cell main body 21 and electrode terminals 22, the battery cell main body 21 includes a conductive case and an electrode assembly housed in the conductive case, the electrode terminals 22 are connected with the electrode assembly, one of the conductive case and the electrode terminals 22 is electrically connected with the first circuit board 3 as a negative electrode, and the other is electrically connected with the first circuit board 3 as a positive electrode.

The conductive shell is coated on the outer side of the electrode assembly, and the conductive shell can be made of conductive materials such as an aluminum plastic film, a steel shell and the like, so that the conductive shell can be directly used as a pole of the battery core 2 to be electrically connected with the first circuit board 3. The electrode assembly comprises a positive plate, a negative plate and a separation film, wherein the positive plate, the negative plate and the separation film are wound to form a winding structure or a lamination structure. The electrode terminals 22 are connected to the electrode assembly and led out from the conductive case to be connected to the first circuit board 3.

Alternatively, the cell 2 is a steel-shelled cell 2. The steel can cell 2 has a higher energy density than lithium cobalt oxide and graphite batteries. The conductive housing is electrically connected to the first circuit board 3 as the negative electrode of the battery cell 2, and the electrode terminal 22 is electrically connected to the first circuit board 3 as the positive electrode of the battery cell 2.

In some embodiments, the battery cells 2 comprise a battery cell main body 21 and a sealing edge part 23, the sealing edge part 23 is arranged around at least part of the battery cell main body 21, the first circuit board 3 is arranged between the battery cell main bodies 21 of the adjacent battery cells 2, and the sealing edge parts 23 of the adjacent battery cells 2 are arranged at intervals and support the first circuit board 3.

The conductive housing may include a first housing and a second housing, and the first housing may be connected to the second housing. The first shell and the second shell can be folded along the connecting position, so that the first shell and the second shell enclose to form a space for accommodating the positive plate, the negative plate and the isolating film. The peripheral side of the first housing extends outward to form a plurality of first extension portions, the peripheral side of the second housing extends outward to form a plurality of second extension portions, and the first extension portions and the second extension portions are overlapped and connected in a sealing manner to form an edge sealing portion 23.

Providing the edge seal 23 is advantageous in improving the sealability of the cell body 21. The edge sealing portions 23 of the adjacent cells 2 are arranged at intervals, and the first circuit board 3 is arranged between the cell main bodies 21 of the adjacent cells 2 so as to avoid or reduce direct contact of the adjacent cells 2. The edge sealing portions 23 of the adjacent battery cells 2 support the first circuit board 3 together, so that the length of the battery cells 2 and the first circuit board 3 as a whole along the first direction X is reduced, and the size of the battery 10 is reduced. Compared with the first circuit board 3 placed on one side of the plurality of cells 2 along the second direction Y, the first circuit board 3 is placed between the adjacent cells 2, so that the length of the battery 10 in the second direction Y of 4 mm-5 mm can be reduced, and the capacity of the battery 10 can be improved.

Alternatively, the edge sealing portion 23 supports the first circuit board 3 in the third direction Z, which is the thickness direction of the battery cell 2.

In some embodiments, the battery 10 further comprises an insulator 4, the insulator 4 being disposed between the first circuit board 3 and the cell 2.

The insulating member 4 is disposed between the first circuit board 3 and the battery cell 2, so as to space the first circuit board 3 and the battery cell 2, which is beneficial to avoiding unwanted conduction between adjacent battery cells 2 and between the battery cell 2 and the first circuit board 3.

The insulating member 4 may be an insulating paste filled between the first circuit board 3 and the battery cell 2, the insulating paste may be a thermoplastic paste injected between the first circuit board 3 and the battery cell 2, and the thermoplastic paste is cured to fix the first circuit board 3 and the battery cell 2.

Referring to fig. 3 in combination, in some embodiments, the battery 10 includes a spacing block 5, and the spacing block 5 is spaced between adjacent cells 2.

The battery cell 2 and the first circuit board 3 can be placed in the housing 1 together, and an integral body is formed by the housing 1. The shell 1 comprises a supporting wall 11 for supporting the battery cell 2, and the limit seat 5 is arranged on the supporting wall 11. The supporting wall 11 and the limiting seat 5 can be assembled into a whole after being independently prepared, and can also be an integrated part. The limit seat 5 may be raised from the support wall 11 in the third direction Z. Spacing seats 5 are spaced between adjacent cells 2 to further avoid or reduce direct contact between adjacent cells 2.

In some embodiments, the first circuit board 3 includes a first flexible circuit board 31, a first board body 32 and a second flexible circuit board 33 sequentially connected along the second direction Y, and the limit seat 5 is disposed on at least one side of the first board body 32 along the second direction Y.

The battery 10 may further include a first electrical connector 6 disposed to be connected to the first flexible circuit board 31 and a second electrical connector 7 connected to the second flexible circuit board 33, and the external circuit may be electrically connected to the first flexible circuit board 31 through the first electrical connector 6 and may be electrically connected to the second flexible circuit board 33 through the second electrical connector 7. Alternatively, the first direction X and the second direction Y are perpendicular. Alternatively, the second direction Y is the length direction of the first circuit board 3.

Through the first flexible circuit board 31, the first board body 32 and the second flexible circuit board 33 which are sequentially connected along the second direction Y, the external circuit can be connected with the battery core 2 from the first flexible circuit board 31 and the second flexible circuit board 33 respectively, and the access of the external circuit is facilitated.

The battery 10 includes a first side 14 and a second side 15 disposed opposite to each other along a second direction Y, the limiting seat 5 is disposed on at least one side of the first plate 32 along the second direction Y, that is, the limiting seat 5 is disposed at an end of the first plate 32 near the first side 14 to limit the movement of the first plate 32 near the first side 14 by the limiting seat 5, the limiting seat 5 may also be disposed at an end of the first plate 32 near the second side 15 to limit the movement of the first plate 32 near the second side 15 by the limiting seat 5, and the limiting seat 5 may also be disposed at opposite ends of the first plate 32 along the second direction Y to limit the movement of the first plate 32 along the second direction Y by the limiting seat 5. Thereby improving the stability of the first circuit board 3 within the housing 1.

Optionally, the limiting seat 5 is disposed at an end of the first plate body 32 near the first side 14. When assembling the battery 10, the adjacent battery cells 2 and the first circuit board 3 can be connected in advance, and then the adjacent battery cells 2 and the first circuit board 3 are put into the housing 1 together from the second side 15, and the first board body 32 is contacted with the limiting seat 5, namely, the battery cells 2 and the first circuit board 3 are assembled in place.

In some embodiments, the length of the first circuit board 3 along the second direction Y is greater than the length of the battery cell 2 along the second direction Y, so that the first circuit board 3 can protrude along the second direction Y relative to the battery cell 2, which is beneficial for connecting the external circuit with both ends of the first circuit board 3 along the second direction Y.

Referring to fig. 4, in some embodiments, at least two battery cells 2 are stacked along the third direction Z to form a battery pack, and the battery packs are disposed on two opposite sides of the first circuit board 3 along the first direction X.

The battery 10 may include more than 4 electric cores 2, and the plurality of electric cores 2 may be stacked along the third direction Z to form a battery pack, where at least two battery components are disposed on two opposite sides of the first circuit board 3 along the first direction X, so as to improve the capacity of the battery 10. The battery packs can be charged and discharged together through the first circuit board 3. Alternatively, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

The second aspect provides an electronic device, referring to fig. 3 and 5, the electronic device includes the battery 10 provided in the first aspect, and the second circuit board 20, the third circuit board 30, the third flexible circuit board 60 and the charging interface 80, where the second circuit board 20 and the third circuit board 30 are disposed on opposite sides of the battery 10 along the second direction Y, opposite ends of the first circuit board 3 along the second direction Y are electrically connected to the second circuit board 20 and the third circuit board 30 respectively, the third flexible circuit board 60 is electrically connected to the second circuit board 20 and the third circuit board 30, the charging interface 80 is disposed on the third circuit board 30, and the charging interface 80 is electrically connected to the first circuit board 3 and the third flexible circuit board 60 through the third circuit board 30.

The electronic device may be a Mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted device, a Mobile internet device (Mobile INTERNET DEVICE, MID), an Augmented Reality (AR)/Virtual Reality (VR) device, a robot, a wearable device, an ultra-Mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), etc., and may also be a personal computer (personal computer, PC), a Television (TV), an teller machine or a self-help machine, etc., which is not limited in the embodiment of the present application. The following description will take an electronic device as an example of a mobile phone.

The second circuit board 20 may be a main control circuit in the electronic device, and is used for controlling the working state of the main functional modules of the electronic device. The circuits in the second circuit board 20 may refer to the equivalent circuit design of the control board in the related art. The third circuit board 30 may be a secondary control circuit within the electronic device, and the circuitry in the third circuit board 30 may refer to the equivalent circuit design of the control sub-board in the related art. Compared with the first circuit board arranged on one side of the plurality of cells, the application arranges the first circuit board 3 between the adjacent cells 2, and the opposite ends of the first circuit board 3 along the second direction Y are respectively electrically connected with the second circuit board 20 and the third circuit board 30, thereby reducing the circuit length of the second circuit board 20 and the third circuit board 30 connected to the first circuit board 3 and reducing the circuit impedance.

The battery cell 2 is a square battery cell 2, and the battery cell 2 is a rectangular battery cell. The width direction of the battery cell 2 is a first direction X, the length direction of the battery cell 2 is a second direction Y, and the thickness direction of the battery cell 2 is a third direction Z. The second circuit board 20 and the third circuit board 30 are respectively arranged on two opposite sides of the battery 10 along the second direction Y, the first circuit board 3 extends along the second direction Y, and two ends of the first circuit board 3 are respectively connected with the second circuit board 20 and the third circuit board 30 through electric connectors. The electrical connector may be a BTB (Board-to-Board) connector.

The third flexible circuit board 60 may extend in the second direction Y, and the third flexible circuit board 60 may also be disposed at one side of the battery 10 in the third direction Z. The electrical signals between the second circuit board 20 and the third circuit board 30 can be split by the first circuit board 3 and the third flexible circuit board 60, thereby reducing the width and thickness of the first circuit board 3 and the third flexible circuit board 60 and reducing the routing impedance of the first circuit board 3 and the third flexible circuit board 60.

Optionally, the third circuit board 30 is further provided with a charging interface 80, an overvoltage protection MOS tube 70 (Over-Voltage Protection Metal Oxide Semiconductor, OVP MOS), and the like, where the charging interface 80 may be a Type-C interface, a Lightning interface, and the like, and the charging current may charge the electric core 2 through the charging interface 80, the third circuit board 30, the third flexible circuit board 60, the second circuit board 20, and the first circuit board 3, and may also charge the electric core 2 through the charging interface 80, the third circuit board 30, and the first circuit board 3, so as to realize shunting of the charging current, facilitate heat dissipation, improve charging efficiency, and promote charging duration of high current.

In some embodiments, the electronic device further includes a first charge management module 40 and a second charge management module 50, the first charge management module 40 is disposed on the second circuit board 20, the first charge management module 40 is electrically connected to the battery cell 2 through the first circuit board 3, the second charge management module 50 is disposed on the third circuit board 30, and the second charge management module 50 is electrically connected to the battery cell 2 through the first circuit board 3.

The first charge management module 40 and the second charge management module 50 are both used for performing charge and discharge management on the battery cell 2. When the circuit is charged, the first charge management module 40 manages the current that sequentially passes through the third circuit board 30, the third flexible circuit board 60, the second circuit board 20, and the first circuit board 3 to charge the battery cell 2, and the second charge management module 50 manages the current that sequentially passes through the third circuit board 30 and the first circuit board 3 to charge the battery cell 2. The first charge management module 40 on the second circuit board 20 and the second charge management module 50 on the third circuit board 30 are used for carrying out shunt management on the charging circuit, so that heat dissipation is facilitated, the charging efficiency is improved, and the charging duration of high current is prolonged.

In some embodiments, the electronic device further comprises a housing 1, the housing 1 having a battery compartment housing the battery 10, such that the first circuit board 3 and the battery cells 2 may be secured within the housing 1. The housing 1 has a protective effect on the first circuit board 3 and the battery cells 2, and allows the first circuit board 3 and the battery cells 2 to be loaded into the housing 1, stored, transported and installed as a unit. Optionally, the housing 1 is a frame of the electronic device, and the frame is recessed or hollow to form a battery compartment.

The housing 1 comprises a supporting wall 11 and a side wall 12 which are connected, the battery cell 2 is arranged on the supporting wall 11, the side wall 12 is arranged around the battery cell 2, the side wall 12 is provided with a containing groove 13, and part of the edge sealing part 23 is clamped in the containing groove 13.

The edge sealing part 23 is partially clamped in the accommodating groove 13, so that the stability of the battery cell 2 in the shell 1 is improved. Alternatively, the edge sealing portion 23 located at one side of the battery core main body 21 away from the first circuit board 3 is clamped in the accommodating groove 13, and the edge sealing portion 23 located at one side of the battery core main body 21 close to the first circuit board 3 supports the first circuit board 3.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A battery, comprising:

At least two battery cells, each having a short side wall extending along a first direction and a long side wall extending along a second direction, wherein the long side walls of at least two of the battery cells are arranged relatively spaced apart along the first direction;

a first circuit board, arranged between the long side walls spaced apart along the first direction, the first circuit board being electrically connected to the battery cells respectively, the first circuit board comprising a first surface and a second surface arranged opposite to each other along the first direction, and at least one first conductive terminal arranged on the first surface and at least one second conductive terminal arranged on the second surface, the first conductive terminal being electrically connected to one or more battery cells located on one side of the first circuit board, the second conductive terminal being electrically connected to one or more battery cells located on the other side of the first circuit board, and the first direction and the second direction intersecting;

The battery cell comprises a battery cell body and an electrode terminal, the battery cell body comprises a conductive shell and an electrode assembly accommodated in the conductive shell, and the electrode terminal is connected to the electrode assembly;

One of the conductive housing and the electrode terminal is electrically connected to the first circuit board as a negative electrode, and the other is electrically connected to the first circuit board as a positive electrode.

2. The battery according to claim 1 is characterized in that the battery cell comprises a battery cell body and an edge sealing portion, and the edge sealing portion is arranged around at least a portion of the battery cell body; the first circuit board is arranged between adjacent battery cell bodies, and the edge sealing portions of adjacent battery cells are arranged at intervals and support the first circuit board.

3 . The battery according to claim 1 , further comprising an insulating member disposed between the first circuit board and the battery cell.

4 . The battery according to claim 1 , characterized in that the battery comprises a limiting seat, and the limiting seat is spaced between adjacent battery cells.

5. The battery according to claim 4, characterized in that the first circuit board comprises a first flexible circuit board, a first plate body and a second flexible circuit board connected in sequence along a second direction, and the limiting seat is arranged on at least one side of the first plate body along the second direction.

6 . The battery according to claim 4 , wherein a length of the first circuit board along the second direction is greater than a length of the battery cell along the second direction.

7. The battery according to claim 1 is characterized in that at least two of the battery cells are stacked along a third direction to form a battery pack, and the battery pack is arranged on opposite sides of the first circuit board along the first direction, and the first direction, the second direction and the third direction intersect each other.

8. An electronic device, comprising:

The battery according to any one of claims 1 to 7;

A second circuit board and a third circuit board are arranged at opposite sides of the battery along a second direction, and opposite ends of the first circuit board along the second direction are electrically connected to the second circuit board and the third circuit board respectively;

a third flexible circuit board, electrically connecting the second circuit board and the third circuit board;

A charging interface is provided on the third circuit board, and the charging interface is electrically connected to the first circuit board and the third flexible circuit board through the third circuit board.

9. The electronic device according to claim 8, characterized in that the electronic device further comprises:

A first charging management module is disposed on the second circuit board, and the first charging management module is electrically connected to the battery cell through the first circuit board;

The second charging management module is arranged on the third circuit board. The second charging management module is electrically connected to the battery cell through the first circuit board. The charging interface is electrically connected to the second charging management module.

10. The electronic device according to claim 8, characterized in that the electronic device further comprises:

The shell comprises a supporting wall and a side wall connected to each other, the battery cell is arranged on the supporting wall, the side wall is arranged around the battery cell, the side wall has a receiving groove, and a portion of the sealed edge portion of the battery cell is engaged in the receiving groove.