Battery and electronic device

Abstract

The present disclosure provides a battery and an electronic device, and belongs to the technical field of electronics. The battery comprises a plurality of battery cells and a plurality of protection circuit components; the battery cell comprises a battery cell body and a packaging film, and the battery cell body is located in the packaging film; the plurality of protection circuit components are respectively located at the top end of different packaging films, the orthographic projection of the protection circuit component on the top end of the packaging film is located in the top end of the packaging film, the distance between the protection circuit component and the top end of the packaging film is less than a preset distance, and the protection circuit component is electrically connected with the battery cell body. By using the present disclosure, the distance between the protection circuit component and the top end of the packaging film can be reduced to less than the preset distance under safe conditions, thereby increasing the available space of the battery cell and improving the capacity of the battery.

Description

Technical Field

[0001] This disclosure relates to the field of electronic technology, and more specifically to a battery and an electronic device. Background Technology

[0002] Batteries are one of the most important components in electronic devices, used to power various devices within them.

[0003] A battery consists of cells and a protection circuit assembly. Typically, a battery contains multiple cells to improve performance, and a protection circuit assembly is located at the top of each cell to protect them during charging and discharging. Each cell comprises a cell body and an encapsulation film. The encapsulation film encapsulates the cell body within it. However, due to the rigidity of the encapsulation film, upward protrusions inevitably form at the bends in its edges during the top-sealing process. This necessitates a significant distance between the protection circuit assembly and the top of the cell to prevent collisions between the two components.

[0004] However, with the limited size of the battery mounting slots in electronic devices, the large distance between the protection circuit components and the battery cells reduces the available space of the cells, i.e., reduces the volume of the cells, and thus reduces the battery capacity. Utility Model Content

[0005] This disclosure provides a battery and an electronic device that can solve the technical problems existing in the related art. The technical solution is as follows:

[0006] On one hand, this disclosure provides a battery, which includes multiple battery cells and multiple protection circuit components;

[0007] The battery cell includes a battery cell body and an encapsulation film, wherein the battery cell body is located in the encapsulation film;

[0008] The plurality of protection circuit components are respectively located at the top of different encapsulation films. The orthographic projection of the protection circuit component on the top of the encapsulation film is located inside the top of the encapsulation film, and the distance between the protection circuit component and the top of the encapsulation film is less than a preset distance. The protection circuit component is electrically connected to the battery cell body.

[0009] In the technical solution provided in this disclosure, each battery cell corresponds to a protection circuit assembly, and the orthographic projection of the protection circuit assembly on the top of the battery cell's encapsulation film is located inside the top of the encapsulation film. That is, the protection circuit assembly can be set between the corner protrusions at the top of the encapsulation film, with a certain distance between them, to avoid collision between the protection circuit assembly and the corner protrusions. In this way, the distance between the protection circuit assembly and the top of the encapsulation film can be reduced to less than a preset distance under safe conditions, thereby increasing the usable space of the battery cell and thus improving the battery capacity.

[0010] In some possible implementations, the protection circuit assembly includes a circuit board body, a plurality of first-stage protection circuit devices, and a plurality of second-stage protection circuit devices.

[0011] The circuit board body is electrically connected to the battery cell body;

[0012] Both the first-stage protection circuit device and the second-stage protection circuit device are electrically connected to the circuit board body.

[0013] In the technical solution provided in this disclosure, double circuit protection is provided for the battery through a first-stage protection circuit device and a second-stage protection circuit device, which avoids dangerous situations such as overcharging and over-discharging and improves the safety of the battery.

[0014] In some possible implementations, the first-stage protection circuit device includes a fuel gauge protection chip, and / or the second-stage protection circuit device includes a lithium protection chip.

[0015] In the technical solution provided in this disclosure, the fuel gauge protection chip and the lithium protection chip are two types of battery protection chips with good protection effects. Using one of them or both together can improve the safety of the battery.

[0016] In some possible implementations, the plane on which the circuit board body is located is parallel to the plane on which the top of the encapsulation film is located.

[0017] In the technical solution provided in this disclosure, the circuit board body and the top of the encapsulation film are arranged parallel to each other, making full use of space and reducing the volume occupied by the circuit board body in the battery mounting slot of the electronic device, thereby increasing the available space of the battery cell and thus increasing the battery capacity.

[0018] In some possible implementations, the circuit board body is a printed circuit board.

[0019] In the technical solution provided in this disclosure, the circuit board body can be a printed circuit board, which can provide support and electrical connection for a first-stage protection circuit device and a second-stage protection circuit device.

[0020] In some possible implementations, the protection circuit assembly further includes a first flexible circuit board electrically connected to the circuit board body, and the first flexible circuit board is also used for electrical connection to the motherboard of the electronic device.

[0021] In the technical solution provided in this disclosure, when the circuit board body is a printed circuit board, the electrical connection between the circuit board body and the motherboard of the electronic device can be realized through the first flexible circuit board. The shape of the first flexible circuit board can be adjusted according to the actual installation scenario, thereby improving the convenience of electrical connection between the circuit board body and the motherboard.

[0022] In some possible implementations, the circuit board body is a second flexible circuit board, which is also used for electrical connection with the motherboard of the electronic device.

[0023] The protection circuit assembly further includes a package housing, which encapsulates the first-stage protection circuit device and the second-stage protection circuit device. The package housing is connected to the second flexible circuit board.

[0024] In the technical solution provided in this disclosure, firstly, since the flexible circuit board is thin, setting the circuit board body as a second flexible circuit board can reduce the volume of the protection circuit components, thereby increasing the available space of the battery cell and thus increasing the battery capacity.

[0025] Secondly, by encapsulating multiple first-stage protection circuit devices and multiple second-stage protection devices in a package, compared with the structure in related technologies where multiple protection circuit devices are distributed and mounted on the circuit board body, the space occupied by the protection circuit devices is reduced, thereby further increasing the usable space of the cell and thus increasing the battery capacity.

[0026] Thirdly, both the first-stage and second-stage protection circuit devices are encapsulated within a housing, which provides fixed protection for these protection circuit devices and prevents them from colliding due to the lower strength of the second flexible circuit board, thereby improving battery safety.

[0027] In some possible implementations, the battery cell further includes a tab, one end of which is located in the encapsulation film and electrically connected to the battery cell body, and the other end of which extends out of the encapsulation film and is electrically connected to the protection circuit assembly.

[0028] In the technical solution provided in this disclosure, the battery cell achieves electrical connection with the protection circuit assembly through the electrode tab, and its electrical connection structure is simple and convenient.

[0029] In some possible implementations, the battery further includes a nickel plate located on the side of the protection circuit assembly near the tab and electrically connected to the protection circuit assembly and the tab.

[0030] In the technical solution provided in this disclosure, the protection circuit assembly can achieve electrical connection with the electrode through a nickel strip, thereby improving the stability of the electrical connection.

[0031] In some possible implementations, the electrode tab is soldered to the protection circuit assembly.

[0032] In the technical solution provided in this disclosure, electrical connection is achieved by removing the nickel sheet 13 and directly welding the connection, thereby shortening the distance between the protection circuit assembly and the battery cell, increasing the usable space of the battery cell, and thus improving the battery capacity.

[0033] In some possible implementations, when the circuit board body is a second flexible circuit board, the circuit board body further includes a reinforcing plate located on the side of the circuit board body away from the tab, the position of the reinforcing plate corresponding to the position of the tab, and the reinforcing plate being connected to the circuit board body.

[0034] In the technical solution provided in this disclosure, on the one hand, a reinforcing plate can be used to support the circuit board body itself, increasing its strength, and to support the welding connection between the circuit board body and the electrode tabs, thereby improving the welding strength. On the other hand, the reinforcing plate can be made relatively thin, increasing strength without occupying too much space, thus ensuring a sufficiently large usable space for the battery cell.

[0035] On the other hand, this disclosure provides an electronic device that includes a battery as described in any of the preceding claims.

[0036] In the technical solution provided in this disclosure, each battery cell corresponds to a protection circuit assembly, and the orthographic projection of the protection circuit assembly on the top of the battery cell's encapsulation film is located inside the top of the encapsulation film. That is, the protection circuit assembly can be set between the corner protrusions at the top of the encapsulation film, with a certain distance between them, to avoid collision between the protection circuit assembly and the corner protrusions. In this way, the distance between the protection circuit assembly and the top of the encapsulation film can be reduced to less than a preset distance under safe conditions, thereby increasing the usable space of the battery cell, thereby increasing the battery capacity and improving the performance of the electronic device.

[0037] In some possible implementations, the electronic device further includes a motherboard and connectors;

[0038] The connectors are electrically connected to the protection circuit assembly and the motherboard, respectively.

[0039] In the technical solution provided in this disclosure, the electrical connection between the battery and the motherboard is achieved through a connector, and its electrical connection structure is simple and convenient.

[0040] In some possible implementations, where the protection circuit assembly includes a circuit board body and the circuit board body is a second flexible circuit board, the connector and the encapsulation housing are located on opposite sides of the circuit board body, the orthographic projection of the connector on the circuit board body and the orthographic projection of the encapsulation housing on the circuit board body at least partially coincide, and the connector is electrically connected to the circuit board body.

[0041] In the technical solution provided in this disclosure, the connector not only achieves electrical connection with the battery through the circuit board body, but also plays a supporting role with the packaging shell, thereby improving the stability of the electrical connection.

[0042] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0043] This disclosure provides a battery in which each cell corresponds to a protection circuit assembly. The orthographic projection of the protection circuit assembly on the top of the cell's encapsulation film is located inside the top of the encapsulation film. That is, the protection circuit assembly can be disposed between the corner protrusions at the top of the encapsulation film, with a certain distance between them, to avoid collision between the protection circuit assembly and the corner protrusions. In this way, the distance between the protection circuit assembly and the top of the encapsulation film can be reduced to less than a preset distance under safe conditions, thereby increasing the usable space of the cell and thus improving the battery capacity.

[0044] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of a battery according to an embodiment of the present disclosure;

[0047] Figure 2 This is a schematic diagram of the circuit topology of a single-stage protection circuit device and a two-stage protection circuit device shown in an embodiment of the present disclosure;

[0048] Figure 3This is a schematic diagram of the structure of a battery according to an embodiment of the present disclosure;

[0049] Figure 4 This is a schematic diagram of the structure of a battery according to an embodiment of the present disclosure;

[0050] Figure 5 This is a schematic diagram of the structure of a battery according to an embodiment of the present disclosure;

[0051] Figure 6 This is a schematic diagram of the structure of an electronic device shown in an embodiment of this disclosure;

[0052] Figure 7 This is a schematic diagram of the structure of an electronic device shown in an embodiment of this disclosure.

[0053] Legend

[0054] 1. Battery;

[0055] 11. Battery cell; 111. Battery cell body; 112. Encapsulation film; 113. Electrode tab;

[0056] 12. Protection circuit assembly; 121. Circuit board body; 122. First-stage protection circuit device; 123. Second-stage protection circuit device; 124. First flexible circuit board; 125. Encapsulation shell; 126. Reinforcing plate;

[0057] 13. Nickel sheets;

[0058] 2. Motherboard;

[0059] 3. Connector. Detailed Implementation

[0060] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0061] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0062] This disclosure provides a battery, see [link to relevant documentation]. Figure 1 The battery 1 includes multiple cells 11 and multiple protection circuit assemblies 12; the cell 11 includes a cell body 111 and an encapsulation film 112, the cell body 111 is located in the encapsulation film 112; the multiple protection circuit assemblies 12 are respectively located at the top of different encapsulation films 112, the orthographic projection of the protection circuit assembly 12 on the top of the encapsulation film 112 is located inside the top of the encapsulation film 112, and the distance between the protection circuit assembly 12 and the top of the encapsulation film 112 is less than a preset distance, and the protection circuit assembly 12 is electrically connected to the cell body 111.

[0063] The battery 1 includes multiple cells 11, which can be connected in series or in parallel. The configuration can be adjusted according to the actual battery requirements. For example, multiple cells 11 can be connected in series to increase the output voltage of the battery 1, or multiple cells 11 can be connected in parallel to increase the capacity of the battery 1. The specific electrical connection method between the multiple cells 11 is not limited in this embodiment.

[0064] The battery cell 11 includes a battery cell body 111 and an encapsulation film 112.

[0065] Among them, the battery cell body 111 can also be a bare battery cell, for example, it can be a wound battery cell, etc.

[0066] The encapsulation film 112 is used to encapsulate the battery cell body 111. For example, it can be an aluminum-plastic film, etc. The encapsulation film 112 can also be called an encapsulation bag. It has a bag-like structure. After the battery cell body 111 is put into the encapsulation film 112, it can be top-sealed, that is, the opening of the encapsulation film 112 is sealed, so that the battery cell body 111 is in the sealed space of the encapsulation film 112.

[0067] The battery 1 includes multiple protection circuit components 12, each of which is located at the top of a cell 11, that is, at the top of the encapsulation film 112 of a cell 11, and is electrically connected to the cell body 111 of the corresponding cell 11, for monitoring and protecting the charging and discharging status of the cell 11.

[0068] For each group of battery cells 11 and protection circuit assembly 12, the orthographic projection of the protection circuit assembly 12 onto the top of the encapsulation film 112 is located within the top of the encapsulation film 112. Thus, the protection circuit assembly 12 can be disposed between the corner protrusions at the top of the encapsulation film 112 (see [reference]). Figure 1There is a certain distance between the two, which avoids collision between the protection circuit assembly 12 and the corner protrusion. In this way, the distance between the top of the protection circuit assembly 12 and the top of the encapsulation film 112 can be reduced to less than the preset distance under safe conditions, thereby increasing the available space of the cell 11 and thus improving the capacity of the battery 1.

[0069] Understandable Figure 1 This is a schematic diagram of the structure of battery 1 including two cells 11. Battery 1 may also include a greater number of cells 11. The present disclosure does not specify the number of cells 11 and protection circuit assembly 12.

[0070] See also some possible implementations. Figure 1 The protection circuit assembly 12 may include a circuit board body 121, a plurality of first-stage protection circuit devices 122 and a plurality of second-stage protection circuit devices 123.

[0071] The circuit board body 121 is electrically connected to the battery cell body 111, and the first-stage protection circuit device 122 and the second-stage protection circuit device 123 are both electrically connected to the circuit board body 121.

[0072] The circuit board body 121 serves as a carrier. A first-stage protection circuit device 122, connected to the battery cell body 111 via the circuit board body 121, provides first-stage protection for the charging and discharging of the battery cell body 111. A second-stage protection circuit device 123, connected to the battery cell body 111 via the circuit board body 121, provides second-stage protection for the charging and discharging of the battery cell body 111.

[0073] In this way, the battery 1 is protected twice by a first-stage protection circuit device 122 and a second-stage protection circuit device 123, which avoids dangerous situations such as overcharging and over-discharging and improves the safety of the battery.

[0074] In some possible implementations, a first-stage protection circuit device 122 includes a fuel gauge protection chip, and / or a second-stage protection circuit device 123 includes a lithium protection chip.

[0075] Both the power meter protection chip and the lithium protection chip can monitor the charging and discharging status, input current, output current, input voltage, output voltage and other parameters of battery 1 in real time. When the parameters exceed the threshold, it can be determined that battery 1 may be overcharged or over-discharged, and the power can be cut off in time to ensure the safety of battery 1 during use.

[0076] Battery protection chips, including fuel gauge chips and lithium protection chips, are two types of battery protection chips with good protection effects. Using one of them or both together can improve battery safety.

[0077] Among them, the power meter protection chip can also detect the remaining power of battery 1 in real time. For example, when charging battery 1, if one of the cells 11 is fully charged while the other cell 11 is not fully charged, the power meter protection chip corresponding to the fully charged cell 11 can control the cell 11 to stop charging, while the power meter protection chip corresponding to the cell 11 that is not fully charged can continue to charge the cell 11.

[0078] In this embodiment of the disclosure, a protection circuit device 122 may include any reasonable device, and its electrical connection method may also be any reasonable way to play the role of protecting the circuit. This embodiment of the disclosure does not limit this.

[0079] For example, see Figure 2 , Figure 2 The diagram shows a protection circuit topology diagram when the battery 1 includes two cells 11 and two protection circuit assemblies 12. Here, the two cells 11 are referred to as the first cell and the second cell, respectively. The protection circuit assembly 12 electrically connected to the first cell is referred to as the first protection circuit assembly, and the protection circuit assembly 12 electrically connected to the second cell is referred to as the second protection circuit assembly.

[0080] The first protection circuit component 122 includes a fuel gauge protection chip 1, capacitors C5 and C6, a thermistor NTC, resistors R12, R13, R14, R15, R16, R17, and R18, a controllable switch Q4, and a precision resistor RS4. These components are electrically connected to the battery cell 111 (Cell1). When the fuel gauge protection chip 1 detects overcharging or over-discharging of Cell1, it can control the controllable switch Q4 to open, thereby stopping Cell1 from charging and discharging, thus achieving first-stage protection to ensure the safety of the battery 1.

[0081] The second-stage protection circuit device 123 of the first protection circuit assembly includes a lithium protection chip 1, a capacitor C1, a resistor R1, a resistor R2, a controllable switch Q1, and a precision resistor RS1. These devices are electrically connected to the battery cell body 111 (Cell1). When the lithium protection chip 1 detects overcharging or over-discharging of Cell1, it can control the controllable switch Q1 to open, thereby stopping Cell1 from charging and discharging, thus realizing second-stage protection to ensure the safety of battery 1.

[0082] Similarly, the first-stage protection circuit device 122 of the second protection circuit assembly includes a fuel gauge protection chip 2, capacitors C3 and C4, a thermistor NTC, resistors R5, R6, R7, R8, R9, R10, and R11, a controllable switch Q3, and a precision resistor RS3. These devices are electrically connected to the cell body 111 (Cell2). When the fuel gauge protection chip 2 detects overcharging or over-discharging of Cell2, it can control the controllable switch Q3 to open, thereby stopping Cell2 from charging and discharging, thus achieving first-stage protection to ensure the safety of battery 1.

[0083] The second protection circuit assembly includes a lithium protection chip 2, a capacitor C2, a resistor R3, a resistor R4, a controllable switch Q2, and a precision resistor RS2. These components are electrically connected to the battery cell body 111 (Cell2). When the lithium protection chip 2 detects overcharging or over-discharging of Cell2, it can control the controllable switch Q2 to open, thereby stopping Cell2 from charging and discharging, thus achieving two-stage protection to ensure the safety of battery 1.

[0084] In this embodiment of the disclosure, the aforementioned power meter protection chip and lithium protection chip can also be replaced with PTC (Positive Temperature Coefficient), fuse, or other specific current protection devices. This embodiment of the disclosure does not limit the specific current protection device.

[0085] See also some possible implementations. Figure 1 and Figure 3 The plane of the circuit board body 121 is parallel to the plane of the top of the encapsulation film 112.

[0086] In this way, by setting the circuit board body 121 and the top of the encapsulation film 112 parallel, the space is fully utilized, the volume occupied by the circuit board body 121 in the battery mounting slot of the electronic device is reduced, thereby increasing the available space of the battery cell 11 and thus increasing the capacity of the battery 1.

[0087] Of course, the plane where the circuit board body 121 is located can also be set perpendicular to the plane where the top of the encapsulation film 112 is located. The position of the circuit board body 121 can be adjusted according to the actual situation and structure. This embodiment does not limit this.

[0088] In some possible implementations, the circuit board body 121 may be a printed circuit board, see [link to relevant documentation]. Figure 1 The printed circuit board can provide a carrier for support and electrical connection of the various first-stage protection circuit devices 122 and second-stage protection circuit devices 123 on it.

[0089] Based on this, participate Figure 1 The protection circuit assembly 12 may also include a first flexible circuit board 124, which is electrically connected to the circuit board body 121. The first flexible circuit board 124 is also used to electrically connect to the motherboard 2 of the electronic device.

[0090] When the circuit board body 121 is a printed circuit board, it can achieve electrical connection with the motherboard 2 of the electronic device through the first flexible circuit board 124. The shape of the first flexible circuit board 124 can be adjusted according to the actual installation scenario, thereby improving the convenience of electrical connection between the circuit board body 121 and the motherboard 2.

[0091] Or see Figure 3 The circuit board body 121 can also be a second flexible circuit board, which is also used for electrical connection with the motherboard 2 of the electronic device.

[0092] The protection circuit assembly 12 also includes a package housing 125, which encapsulates a first protection circuit device 122 and a second protection circuit device 123. The package housing 125 is connected to the circuit board body 121.

[0093] In this way, the second flexible circuit board provides a carrier for the electrical connection between the cell body 111 and the first-stage protection circuit device 122 and the second-stage protection circuit device 123. Since the flexible circuit board is thinner, setting the circuit board body 121 as the second flexible circuit board can reduce the volume of the protection circuit assembly 121, thereby increasing the available space of the cell 11 and thus increasing the capacity of the battery 1.

[0094] Furthermore, by encapsulating multiple first-stage protection circuit devices 122 and multiple second-stage protection devices 123 in a package housing 125, compared with the structure in related technologies where multiple protection circuit devices are distributed and mounted on the circuit board body, the space occupied by the protection circuit devices is reduced, thereby further increasing the usable space of the cell 11 and thus increasing the capacity of the battery 1.

[0095] Furthermore, both the first-stage protection circuit device 122 and the second-stage protection device 123 are encapsulated within the encapsulation housing 125, which provides fixed protection for these protection circuit devices and prevents collisions between them due to the low strength of the second flexible circuit board, thereby improving the safety of the battery 1.

[0096] See also some possible implementations. Figure 1 and Figure 3The battery cell 11 also includes a tab 113. One end of the tab 113 is located in the encapsulation film 112 and is electrically connected to the battery cell body 111. The other end of the tab 113 extends out of the encapsulation film 112 and is electrically connected to the protection circuit assembly 12.

[0097] The battery cell 11 is electrically connected to the protection circuit assembly 12 through the tab 113, and its electrical connection structure is simple and convenient.

[0098] See also some possible implementations. Figure 1 and Figure 3 The battery 1 may also include a nickel plate 13, which is located on the side of the protection circuit assembly 12 near the tab 113 and is electrically connected to the protection circuit assembly 12 and the tab 113. In this way, the protection circuit assembly 12 can achieve electrical connection with the tab 113 through the nickel plate 13, thereby improving the stability of the electrical connection.

[0099] Or see Figure 4 and Figure 5 The nickel sheet 13 can be removed, and the tab 113 can be welded to the protection circuit assembly 12. In this way, the electrical connection between the tab 113 and the protection circuit assembly 12 can be achieved directly by welding. For example, it can be ultrasonic welding, laser welding, etc. This disclosure does not limit this.

[0100] In this way, by removing the nickel sheet 13, the distance between the protection circuit assembly 12 and the battery cell 11 is shortened, thereby increasing the available space of the battery cell 11 and thus increasing the capacity of the battery 1.

[0101] See also some possible implementations. Figure 5 In the case where the circuit board body 121 is a second flexible circuit board, the protection circuit assembly 12 may further include a reinforcing plate 126. The reinforcing plate 126 is located on the side of the circuit board body 121 away from the tab 113. The position of the reinforcing plate 126 corresponds to the position of the tab 113, and the reinforcing plate 126 is connected to the circuit board body 121.

[0102] In this way, on the one hand, the reinforcing plate 126 can provide support for the circuit board body 121 itself, improving its strength, and also provide support for the welding connection between the circuit board body 121 and the electrode 113, thereby improving the welding strength. On the other hand, the reinforcing plate 126 can be made relatively thin, so as to improve the strength without taking up too much space, thus ensuring that the battery cell 11 has a sufficiently large usable space.

[0103] In this embodiment of the disclosure, the reinforcing plate 126 can be any metal plate with high strength, such as a steel sheet, etc., and this embodiment of the disclosure does not limit it.

[0104] This disclosure also provides an electronic device, which includes a battery 1 as described in any of the preceding embodiments.

[0105] Each cell 11 corresponds to a protection circuit assembly 12, and the orthographic projection of the protection circuit assembly 12 on the top of the encapsulation film 112 of the cell 11 is located inside the top of the encapsulation film 112. That is, the protection circuit assembly 12 can be set between the corner protrusions at the top of the encapsulation film 112, with a certain distance between them, to avoid collision between the protection circuit assembly 12 and the corner protrusions. In this way, the distance between the protection circuit assembly 12 and the top of the encapsulation film 112 can be reduced to less than a preset distance under safe conditions, thereby increasing the usable space of the cell 11, thereby increasing the capacity of the battery 1 and improving the performance of the electronic device (e.g., battery life, etc.).

[0106] In some possible implementations, see Figure 6 and... Figure 7 The electronic device also includes a motherboard 2 and a connector 3. The connector 3 is electrically connected to the protection circuit assembly 12 and the motherboard 2, respectively. In this way, the electrical connection between the battery and the motherboard is achieved through the connector, and its electrical connection structure is simple and convenient.

[0107] See also some possible implementations. Figure 7 In the case where the protection circuit assembly 12 includes a circuit board body 121 and the circuit board body 121 is a second flexible circuit board, the connector 3 and the package housing 125 can be located on opposite sides of the circuit board body 121 (i.e. the second flexible circuit board). The orthographic projection of the connector 3 on the circuit board body 121 and the orthographic projection of the package housing 125 on the circuit board body 121 at least partially coincide, and the connector 3 is electrically connected to the circuit board body 121.

[0108] In this way, while the connector 3 achieves an electrical connection with the battery 1 through the circuit board body 121, it also provides mutual support with the encapsulation housing 125, thereby improving the stability of the electrical connection.

[0109] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0110] This disclosure provides a battery 1, in which each cell 11 corresponds to a protection circuit assembly 12. The orthographic projection of the protection circuit assembly 12 on the top of the encapsulation film 112 of the cell 11 is located inside the top of the encapsulation film 112. That is, the protection circuit assembly 12 can be disposed between the corner protrusions at the top of the encapsulation film 112, with a certain distance between them, to avoid collision between the protection circuit assembly 12 and the corner protrusions. In this way, the distance between the protection circuit assembly 12 and the top of the encapsulation film 112 can be reduced to less than a preset distance under safe conditions, thereby increasing the usable space of the cell 11 and thus improving the capacity of the battery 1.

[0111] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A battery, characterized in that, The battery (1) includes multiple cells (11) and multiple protection circuit components (12); The battery cell (11) includes a battery cell body (111) and an encapsulation film (112), wherein the battery cell body (111) is located in the encapsulation film (112); The plurality of protection circuit components (12) are respectively located at the top of different encapsulation films (112). The orthographic projection of the protection circuit component (12) on the top of the encapsulation film (112) is located inside the top of the encapsulation film (112), and the distance between the protection circuit component (12) and the top of the encapsulation film (112) is less than a preset distance. The protection circuit component (12) is electrically connected to the battery cell body (111).

2. The battery according to claim 1, characterized in that, The protection circuit assembly (12) includes a circuit board body (121), a plurality of first-stage protection circuit devices (122) and a plurality of second-stage protection circuit devices (123); The circuit board body (121) is electrically connected to the battery cell body (111); Both the first-stage protection circuit device (122) and the second-stage protection circuit device (123) are electrically connected to the circuit board body (121).

3. The battery according to claim 2, characterized in that, The first-stage protection circuit device (122) includes a power meter protection chip, and / or the second-stage protection circuit device (123) includes a lithium protection chip.

4. The battery according to claim 2, characterized in that, The plane of the circuit board body (121) is parallel to the plane of the top of the encapsulation film (112).

5. The battery according to claim 2, characterized in that, The circuit board body (121) is a printed circuit board.

6. The battery according to claim 5, characterized in that, The protection circuit assembly (12) further includes a first flexible circuit board (124), which is electrically connected to the circuit board body (121) and is also used to electrically connect to the motherboard (2) of the electronic device.

7. The battery according to claim 2, characterized in that, The circuit board body (121) is a second flexible circuit board, which is also used for electrical connection with the motherboard (2) of the electronic device; The protection circuit assembly (12) further includes a package housing (125), which encapsulates the first-stage protection circuit device (122) and the second-stage protection circuit device (123). The package housing (125) is connected to the circuit board body (121).

8. The battery according to any one of claims 1 to 7, characterized in that, The battery cell (11) also includes a tab (113), one end of which is located in the encapsulation film (112) and electrically connected to the battery cell body (111), and the other end of which extends out of the encapsulation film (112) and is electrically connected to the protection circuit assembly (12).

9. The battery according to claim 8, characterized in that, The battery (1) also includes a nickel sheet (13), which is located on the side of the protection circuit assembly (12) near the tab (113) and is electrically connected to the protection circuit assembly (12) and the tab (113).

10. The battery according to claim 8, characterized in that, The electrode tab (113) is welded to the protection circuit assembly (12).

11. The battery according to claim 10, characterized in that, When the circuit board body (121) is a second flexible circuit board, the circuit board body (121) further includes a reinforcing plate (126). The reinforcing plate (126) is located on the side of the circuit board body (121) away from the tab (113). The position of the reinforcing plate (126) corresponds to the position of the tab (113). The reinforcing plate (126) is connected to the circuit board body (121).

12. An electronic device, characterized in that, The electronic device includes the battery (1) as described in any one of claims 1 to 11.

13. The electronic device according to claim 12, characterized in that, The electronic device also includes a motherboard (2) and a connector (3); The connector (3) is electrically connected to the protection circuit assembly (12) and the motherboard (2) respectively.

14. The electronic device according to claim 13, characterized in that, In the case where the protection circuit assembly (12) includes a circuit board body (121) and the circuit board body (121) is a second flexible circuit board, the connector (3) and the encapsulation housing (125) are respectively located on opposite sides of the circuit board body (121), the orthographic projection of the connector (3) on the circuit board body (121) and the orthographic projection of the encapsulation housing (125) on the circuit board body (121) at least partially coincide, and the connector (3) is electrically connected to the circuit board body (121).

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