Battery assembly and electronic equipment

Abstract

The utility model discloses a battery assembly and electronic equipment, the battery assembly comprises a first battery cell, a second battery cell and a battery protection board, the first battery cell and the second battery cell are arranged in parallel, and a mounting gap is formed between the first battery cell and the second battery cell. The battery protection plate comprises a functional part and a connecting part, the functional part is used for realizing the protection function of the battery protection plate and is connected with the connecting part, and the connecting part is electrically connected with the first tab of the first battery cell and the second tab of the second battery cell respectively, so that the functional part can be connected with the first battery cell and the second battery cell. When the battery protection plate is mounted, at least part of the functional part can be arranged in the mounting gap, and the connecting part is arranged outside the mounting gap, so that dispersed mounting of the functional part and the connecting part is realized, and the condition that the local size of the battery assembly is too large due to stacked mounting of parts can be avoided; and therefore, the probability of extrusion, collision and scratch of the battery protection plate can be reduced.

Description

TECHNICAL FIELD

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

[0002] At present, electronic devices such as mobile phones, tablet computers and the like are mostly powered by batteries, and a battery protection board is generally integrated inside the battery. The battery protection board can protect the battery during charging and discharging, and avoid problems such as overcharging, overdischarging, short circuit and the like.

[0003] In related technologies, in order to improve the battery capacity, a double-cell structure is often used, and the battery protection board is usually packaged at the head of the double-cell structure, which leads to the problem that the head of the double-cell structure is prone to have a large volume. In addition, during the installation of the battery, the large volume of the head also easily leads to problems such as extrusion, collision and scratching of the battery protection board. UTILITY MODEL CONTENT

[0004] The present application discloses a battery assembly and an electronic device to solve the problem of a large volume of the head of a double-cell structure in related technologies.

[0005] In order to solve the above technical problems, the present application is implemented as follows:

[0006] In a first aspect, the embodiments of the present application disclose a battery assembly, which comprises a first cell, a second cell and a battery protection board.

[0007] The first cell and the second cell are arranged side by side, and there is an installation gap between the first cell and the second cell.

[0008] The battery protection board comprises a functional part and a connecting part. At least part of the functional part is arranged in the installation gap, and the connecting part is arranged outside the installation gap. The functional part is connected to the connecting part, and the connecting part is electrically connected to a first tab of the first cell and a second tab of the second cell, respectively.

[0009] In a second aspect, the embodiments of the present application disclose an electronic device, which comprises a device shell, a mainboard and the above-mentioned battery assembly. The mainboard and the battery assembly are both installed in the device shell, and the battery assembly is connected to the mainboard.

[0010] The technical solution adopted by the present application can achieve the following technical effects:

[0011] The battery assembly disclosed in this application improves upon related technologies. The battery assembly includes a first cell, a second cell, and a battery protection board. The first and second cells are arranged side-by-side, with an installation gap between them. The battery protection board includes a functional section and a connecting section. The functional section performs the protection function of the battery protection board and is connected to the connecting section. The connecting section is electrically connected to the first tab of the first cell and the second tab of the second cell, respectively, thereby connecting the functional section to the first and second cells. When installing the battery protection board, at least a portion of the functional section can be placed within the installation gap, while the connecting section is placed outside the installation gap. This disperses the functional section and the connecting section, preventing the battery assembly from becoming excessively large in some areas due to component stacking, thus reducing the probability of the battery protection board being squeezed, impacted, or scratched. Simultaneously, the first and second cells also provide shielding protection for the functional section, further reducing the probability of damage to the battery protection board and improving the lifespan of the battery assembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the battery assembly disclosed in the embodiments of this application.

[0013] Explanation of reference numerals in the attached figures:

[0014] 110-First battery cell, 111-First tab, 1111-First positive tab, 1112-First negative tab, 112-First side, 120-Second battery cell, 121-Second tab, 1211-Second positive tab, 1212-Second negative tab, 122-Second side, 130-Battery protection board, 131-Functional part, 1311-Rigid board, 1312-Battery protection device, 132-Connecting part, 1321-First flexible board, 1322-Second flexible board, 1323-First bending section, 1324-Second bending section, 140-Installation gap, 150-Connector. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0016] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0017] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0018] A battery protection board protects the battery cell during charging and discharging to prevent it from being overcharged, over-discharged, overcurrented, short-circuited, or subjected to excessively high temperatures. In related technologies, the battery protection board includes a PCB (Printed Circuit Board) and an FPC (Flexible Printed Circuit). The PCB and FPC are stacked and soldered together, then mounted together at a predetermined end of the battery cell. Because the stacked volume of the PCB and FPC is relatively large, it can result in an excessively thick predetermined end of the battery cell.

[0019] Based on the above issues, please refer to Figure 1 This application discloses a battery assembly, which may include a first battery cell 110, a second battery cell 120, and a battery protection board 130. The first battery cell 110 and the second battery cell 120 are arranged side-by-side. The first battery cell 110 has a first tab 111, and the second battery cell 120 has a second tab 121. The tab is a metal conductor that leads the positive and negative electrodes out of the battery cell. The end of the first battery cell 110 with the first tab 111 can be defined as the head of the first battery cell 110, and the end of the second battery cell 120 with the second tab 121 can be defined as the head of the second battery cell 120. When the first battery cell 110 and the second battery cell 120 are arranged side-by-side, the heads of the first battery cell 110 and the heads of the second battery cell 120 face the same direction.

[0020] The battery protection board 130 includes a functional part 131 and a connecting part 132. The functional part 131 is equipped with devices such as a control IC and a MOS switch to realize the protection function of the battery protection board 130. The connecting part 132 is mainly used to realize the electrical connection between the functional part 131 and components such as the first battery cell 110 and the second battery cell 120. The first battery cell 110 and the second battery cell 120 are arranged side by side and have a mounting gap 140 between them. At least a part of the functional part 131 can be placed in the mounting gap 140 and the connecting part 132 can be placed outside the mounting gap 140. This allows the functional part 131 and the connecting part 132 to be distributed and installed in different positions of the battery assembly, avoiding a concentrated stacking situation.

[0021] In actual connection, the functional part 131 is connected to the connecting part 132. The connecting part 132 is electrically connected to the first tab 111 of the first battery cell 110 and the second tab 121 of the second battery cell 120. The specific connection method may include welding, conductive bonding, etc.

[0022] As described above, the battery assembly disclosed in this application improves upon related technologies. When installing the battery protection board 130, at least a portion of the functional part 131 can be disposed within the installation gap 140, while the connecting part 132 is disposed outside the installation gap 140. This allows for the distributed installation of the functional part 131 and the connecting part 132, thereby preventing the battery assembly from becoming excessively large in some areas due to the stacking of components. Consequently, the probability of the battery protection board 130 being squeezed, collided, or scratched is reduced. Simultaneously, the first cell 110 and the second cell 120 can also shield and protect the functional part 131, further reducing the probability of damage to the battery protection board 130 and improving the service life of the battery assembly.

[0023] like Figure 1 As shown, in order to facilitate the connection between the functional part 131 and the connecting part 132, the functional part 131 has a connecting end that extends out of the mounting gap 140. The functional part 131 can be connected to the connecting part 132 through the connecting end. The specific connection method can be welding, conductive bonding, etc.

[0024] Since various components need to be installed on functional unit 131, in order to improve the stability of the installation, such as Figure 1As shown, the functional unit 131 may include a rigid board 1311 and a battery protection device 1312. The rigid board 1311 may be a PCB board. The battery protection device 1312 may be electrically connected to the surface of the rigid board 1311 by means of soldering, conductive bonding, etc. Furthermore, the battery protection device 1312 is located in the mounting gap 140. Under the protection of the first battery cell 110 and the second battery cell 120, the probability of the battery protection device 1312 being bumped or damaged can be reduced. The battery protection device 1312 may include components such as a control IC, MOS switch, resistor, capacitor, fuse, PTC (positive temperature coefficient thermistor), NTC (negative temperature coefficient thermistor), and memory.

[0025] The control IC is the core of the protection board, responsible for monitoring battery voltage and current. When the voltage or current exceeds the set value, the control IC controls the opening and closing of the MOS switch to protect the battery. Resistors are used to limit current or divide voltage to ensure stable circuit operation. Capacitors are used to stabilize voltage, filter, or store energy to ensure stable circuit operation. When the current abnormally rises to a certain level, the fuse will blow, cutting off the circuit and preventing the battery from overheating or being damaged. In high-temperature environments, the resistance of the PTC will increase sharply, limiting the current and preventing the battery from overheating. When the ambient temperature rises, the resistance of the NTC will decrease, used to monitor the battery temperature to control the charging and discharging process. The memory is used to store the setting parameters of the battery protection board 130, such as overcharge, over-discharge, and overcurrent protection thresholds. These components work together to ensure the safety of the battery during charging and discharging, preventing problems such as overcharging, over-discharging, overcurrent, short circuits, and overheating, thereby extending the battery's lifespan.

[0026] like Figure 1 As shown, the aforementioned connecting portion 132 may include a first flexible circuit board 1321 and a second flexible circuit board 1322. The first and second flexible circuit boards 1321 and 1322 can be flexible printed circuit boards (FPCs). FPCs are bend-resistant circuit boards made with polyimide or polyester film as the substrate, featuring high wiring density, light weight, and thinness. A first tab 111 is disposed at the mounting end of the first battery cell 110, and a second tab 121 is disposed at the mounting end of the second battery cell 120. The first flexible circuit board 1321 can be disposed opposite to the mounting ends of the first battery cell 110 and the second battery cell 120, respectively, so that the first flexible circuit board 1321 can be electrically connected to the first tab 111 and the second tab 121, respectively. One end of the second flexible circuit board 1322 is connected to the first flexible circuit board 1321, and the other end of the second flexible circuit board 1322 is connected to the connecting end, thereby realizing the conduction of the circuit between the functional portion 131 and the first battery cell 110 and the second battery cell 120. The connection method between the second flexible board 1322, the first flexible board 1321, and the functional part 131 can be welding, conductive bonding, etc.

[0027] like Figure 1As shown, the first flexible circuit board 1321 may include a first end and a second end facing away from each other. The first end is close to the first battery cell 110, and the second end is close to the second battery cell 120. At least one of the first end and the second end is provided with a connector 150. The battery protection board 130 can be connected to an external circuit through the connector 150. For example, when the battery assembly is installed in an electronic device, the battery protection board 130 can be connected to the motherboard of the electronic device through the connector 150, and the motherboard of the electronic device can uniformly control the battery assembly. The type of connector 150 may include a plug connector, a snap-fit ​​connector, a threaded connector, etc.

[0028] To facilitate connection of connector 150 to external circuits, such as Figure 1 As shown, the first flexible circuit board 1321 has a first bending section 1323 at its first end, which bends away from the first battery cell 110. The second end of the first flexible circuit board 1321 has a second bending section 1324, which bends away from the second battery cell 120. Both the end of the first bending section 1323 and the end of the second bending section 1324 are provided with connectors 150, which is beneficial for the main board of the electronic device to control the first battery cell 110 and the second battery cell 120 separately.

[0029] The first flexible circuit board 1321 is used to connect with the first battery cell 110 and the second battery cell 120. Specifically, a first tab pad and a second tab pad can be respectively provided on the surface of the first flexible circuit board 1321 near the first battery cell 110 and the second battery cell 120. The first tab pad is electrically connected to the first tab 111, and the second tab pad is electrically connected to the second tab 121. The tab pad and the tab of the battery cell can be assembled by welding, conductive bonding or other methods.

[0030] The aforementioned first tab 111 may include a first positive tab 1111 and a first negative tab 1112, and the second tab 121 may include a second positive tab 1211 and a second negative tab 1212. The first tab pad may include a first positive tab pad and a first negative tab pad, and the second tab pad may include a second positive tab pad and a second negative tab pad. The first positive tab pad is electrically connected to the first positive tab 1111, the first negative tab pad is electrically connected to the first negative tab 1112, the second positive tab pad is electrically connected to the second positive tab 1211, and the second negative tab pad is electrically connected to the second negative tab 1212, thereby enabling the circuit to be connected between the first battery cell 110, the second battery cell 120, and the battery protection board 130. The aforementioned electrical connection methods may include welding, conductive bonding, etc.

[0031] like Figure 1As shown, the first battery cell 110 has a first side 112 adjacent to the second battery cell 120, and the second battery cell 120 has a second side 122 adjacent to the first battery cell 110. The first side 112 and the second side 122 are spaced apart to form a mounting gap 140. Along the perpendicular line connecting the first side 112 and the second side 122, the size of the mounting gap 140 can be larger than the size of the functional part 131, thereby preventing interference between the components on the functional part 131 and the first battery cell 110 or the second battery cell 120. Furthermore, after the first battery cell 110, the second battery cell 120, and the battery protection board 130 are assembled, they can be encapsulated as a whole to improve the dustproof and waterproof performance of the battery assembly. The encapsulation material can be polyethylene, polypropylene, polystyrene, etc.

[0032] This application also discloses an electronic device, which may include battery-powered electronic products such as mobile phones, tablets, televisions, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality terminal devices, and augmented reality terminal devices. The aforementioned electronic devices may also be rechargeable small household appliances (e.g., soymilk makers, robot vacuum cleaners), drones, and other electronic products. This application does not impose any special limitations on the specific form of the aforementioned electronic device.

[0033] The aforementioned electronic device may include a device housing, a motherboard, and the aforementioned battery assembly. Both the motherboard and the battery assembly are installed in the device housing, and the battery assembly is connected to the motherboard. The motherboard of the electronic device can uniformly control the battery assembly.

[0034] As described above, the battery assembly disclosed in this application improves upon related technologies. The battery assembly includes a first cell 110, a second cell 120, and a battery protection board 130. The first cell 110 and the second cell 120 are arranged side-by-side, with an installation gap 140 between them. The battery protection board 130 includes a functional part 131 and a connecting part 132. The functional part 131 implements the protection function of the battery protection board 130. The functional part 131 is connected to the connecting part 132, which is electrically connected to the first tab 111 of the first cell 110 and the second tab 121 of the second cell 120, thereby connecting the functional part 131 to the first cell 110 and the second cell 120. When installing the battery protection board 130, at least a portion of the functional part 131 can be placed in the installation gap 140, and the connecting part 132 can be placed outside the installation gap 140, so as to realize the distributed installation of the functional part 131 and the connecting part 132. This can avoid the situation where the battery assembly has an excessively large local volume due to the stacking of components, thereby reducing the probability of the battery protection board 130 being squeezed, collided, or scratched. At the same time, the first cell 110 and the second cell 120 can also shield and protect the functional part 131, further reducing the probability of damage to the battery protection board 130 and improving the service life of the battery assembly.

[0035] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different technical features between the various embodiments are not contradictory, they can be combined to form more specific embodiments. For the sake of brevity, they will not be described in detail here.

[0036] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A battery assembly, comprising: The battery protection plate (130) comprises a functional part (131) and a connecting part (132), at least part of the functional part (131) is arranged in the installation gap (140), the connecting part (132) is arranged outside the installation gap (140), the functional part (131) is connected with the connecting part (132), and the connecting part (132) is electrically connected with the first tab (111) of the first battery cell (110) and the second tab (121) of the second battery cell (120) respectively. The functional part (131) has a connecting end extending out of the installation gap (140), and the connecting end is connected with the connecting part (132). The functional part (131) comprises a hard plate (1311) and a battery protection device (1312), the battery protection device (1312) is electrically connected to the surface of the hard plate (1311), and the battery protection device (1312) is located in the installation gap (140).

2. The battery assembly of claim 1, wherein, The connecting part (132) comprises a first soft plate (1321) and a second soft plate (1322), the first tab (111) is arranged at the mounting end of the first battery cell (110), the second tab (121) is arranged at the mounting end of the second battery cell (120), the first soft plate (1321) is arranged opposite to the mounting end of the first battery cell (110) and the mounting end of the second battery cell (120) respectively, and is electrically connected with the first tab (111) and the second tab (121) respectively.

3. The battery assembly of claim 1, wherein, One end of the second soft plate (1322) is connected with the first soft plate (1321), and the other end of the second soft plate (1322) is connected with the connecting end.

4. The battery assembly of claim 2, wherein, The first soft plate (1321) comprises a first end and a second end opposite to each other, the first end is close to the first battery cell (110), and the second end is close to the second battery cell (120). At least one of the first end and the second end is provided with a connector (150).

5. The battery assembly of claim 4, wherein, The first end is provided with a first bending section (1323) which is bent away from the first battery cell (110), and the second end is provided with a second bending section (1324) which is bent away from the second battery cell (120). The connector (150) is arranged at the end of the first bending section (1323) and the end of the second bending section (1324).

6. The battery assembly of claim 5, wherein, The surface of the first soft plate (1321) close to the first battery cell (110) and the second battery cell (120) is respectively provided with a first tab pad and a second tab pad, the first tab pad is electrically connected with the first tab (111), and the second tab pad is electrically connected with the second tab (121). ​ 7. The battery assembly of claim 4, wherein, ​ 8. The battery assembly of claim 7, wherein, The first tab (111) comprises a first positive tab (1111) and a first negative tab (1112), and the second tab (121) comprises a second positive tab (1211) and a second negative tab (1212); The first tab pad comprises a first positive tab pad and a first negative tab pad, and the second tab pad comprises a second positive tab pad and a second negative tab pad; The first positive tab pad is electrically connected with the first positive tab (1111), the first negative tab pad is electrically connected with the first negative tab (1112), the second positive tab pad is electrically connected with the second positive tab (1211), and the second negative tab pad is electrically connected with the second negative tab (1212).

9. The battery assembly of claim 1, wherein, The first electric core (110) has a first side edge (112) close to the second electric core (120), the second electric core (120) has a second side edge (122) close to the first electric core (110), and the first side edge (112) and the second side edge (122) are arranged at intervals to form the installation gap (140); In the direction of the perpendicular line of the first side edge (112) and the second side edge (122), the size of the installation gap (140) is greater than the size of the functional part (131).

10. An electronic device, comprising: The device comprises a device shell, a mainboard and the battery assembly of any one of claims 1-9, the mainboard and the battery assembly are installed in the device shell, and the battery assembly is connected with the mainboard.

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