Battery assembly and terminal

Abstract

A battery assembly (20) and a terminal (01). The terminal (01) comprises a mainboard (13) and the battery assembly (20). The mainboard (13) comprises a battery protection module (132), and the battery assembly (20) comprises a battery cell (21) and a battery circuit board assembly (22). The battery cell (21) comprises a battery cell body (210) and a top sealing portion (2121), the top sealing portion (2121) is arranged in a bent shape on the top surface of the battery cell body (210), and a first tab (211a) and a second tab (211b) of the battery cell (21) are led out from the top sealing portion (2121). The battery circuit board assembly (22) comprises a battery circuit board (220), a tab pad (221), a first connector (222a), and a second connector (222b). The battery circuit board (220) comprises a main body portion (2201) and an extension portion (2202) bent relative to the main body portion (2201). The tab pad (221) is arranged on the main body portion (2201) and is attached to at least part of the top sealing portion (2121). The tab pad (221) comprises a first tab pad (221a) electrically connected to the first tab (211a) and a second tab pad (221b) electrically connected to the second tab (211b). The first connector (222a) is electrically connected to the first tab pad (221a), and the first connector (222a) is used for connecting to the mainboard (13). The second connector (222b) is electrically connected to the second tab pad (221b), and the second connector (222b) is used for connecting to the mainboard (13). The battery protection module (132) is electrically connected to at least one of the first connector (222a) and the second connector (222b).

Description

Battery components and terminals Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery assembly and a terminal. Background Art

[0002] With the development of mobile phone terminals, the frequency performance of System-On-a-Chip (SOC) is getting higher and higher, and the overall power consumption of mobile phones is also gradually increasing. For user portability considerations, the screen size of mobile phone terminals is generally less than 7 inches. Given the given size of mobile phone terminals, the space occupied by various functional modules such as internal cameras, SOCs, and charging chips is increasing. Currently, the battery capacity is usually increased by increasing the size of battery cells, thereby improving the battery life of mobile phone terminals. However, while increasing the size of battery cells, the configuration of each functional module of the mobile phone terminal must also be taken into account. Therefore, how to increase battery capacity and thus improve battery life while taking into account the configuration of each functional module of the mobile phone terminal has become a technical problem that needs to be solved urgently.

[0003] Utility Model Content

[0004] In view of the above problems, the present application provides a battery assembly and terminal to increase the battery capacity and thus improve the battery life while taking into account the configuration of various functional modules of the mobile phone terminal.

[0005] In a first aspect, the present application provides a battery assembly for use in a terminal. The terminal includes a mainboard and a battery assembly. The mainboard includes a battery protection module, and the battery assembly includes a battery cell and a battery circuit board assembly. The battery cell includes a cell body and a top seal. The top seal is disposed in a curved shape on the top surface of the cell body, from which a first and second tab of the cell are extended. The battery circuit board assembly includes a battery circuit board, tab pads, a first connector, and a second connector. The battery circuit board includes a main body and an extension extending outward from the main body, the extension being curved relative to the main body. The tab pads are disposed on the main body and mate with at least a portion of the top seal. The tab pads include at least a first tab pad and a second tab pad, the first tab pad being electrically connected to the first tab, and the second tab pad being electrically connected to the second tab. A first connector is disposed on the extension and electrically connected to the first tab pad, and the first connector is used to connect to the mainboard. A second connector is disposed on the extension and electrically connected to the second tab pad, and the second connector is used to connect to the mainboard. The battery protection module is electrically connected to at least one of the first connector and the second connector.

[0006] It is understood that the battery assembly provided in the embodiments of the present application places the battery protection module on the mainboard, reducing the impact of the battery protection module on the volume of the battery assembly. The top seal portion of the battery cell is bent to further compress the space above the battery cell, thereby increasing the capacity of the battery cell body and thereby extending the battery life of the terminal.

[0007] In conjunction with the first aspect, in one possible implementation, the battery cell further includes a third tab, the tab pad further includes a third tab pad, and the third tab pad is electrically connected to the third tab. The first and third tabs are positive tabs, and the second tab is a negative tab. The first connector includes a positive terminal and a negative terminal, and the second connector includes a positive terminal and a negative terminal. The battery circuit board assembly includes a first conductive circuit, a second conductive circuit, and a third conductive circuit disposed on the battery circuit board. The first end of the first conductive circuit is electrically connected to the first tab pad, and the second end of the first conductive circuit is electrically connected to the positive terminal of the first connector. The first end of the second conductive circuit is electrically connected to the third tab pad, and the second end of the second conductive circuit is electrically connected to the positive terminal of the second connector. The first end of the third conductive circuit is electrically connected to the second tab pad, the second end of the third conductive circuit is electrically connected to the negative terminal of the first connector, and the third end of the third conductive circuit is electrically connected to the negative terminal of the second connector.

[0008] In conjunction with the first aspect, in one possible implementation, the battery circuit board assembly further includes a battery protection unit, wherein the height of the battery protection unit is lower than the welding height of the first tab pad, the welding height of the second tab pad, and the welding height of the third tab pad. The battery protection unit is disposed at the junction of the first end of the third conductive trace and the second tab pad. It will be appreciated that the battery protection unit's height being lower than the welding height of the tab pad can prevent the battery protection unit from occupying space along the length of the battery cell body.

[0009] With reference to the first aspect, in a possible implementation, the battery protection unit is a current fuse.

[0010] In conjunction with the first aspect, in one possible implementation, the battery protection unit is a protection switch tube, wherein a first end of the protection switch tube is electrically connected to a first end of the third conductive line, and a second end of the protection switch tube is electrically connected to the second tab pad. In response to a short circuit in the battery assembly, the protection switch tube is turned off.

[0011] In combination with the first aspect, in a possible implementation, the third conductive circuit includes a metal layer and a flame retardant layer, the flame retardant layer is disposed on a surface of the battery circuit board, and the metal layer is disposed on a surface of the flame retardant layer.

[0012] In conjunction with the first aspect, in one possible implementation, the battery circuit board assembly includes a fourth conductive circuit disposed on the battery circuit board, wherein a first end of the fourth conductive circuit is electrically connected to the first conductive circuit, and a second end of the fourth conductive circuit is electrically connected to the second conductive circuit.

[0013] In conjunction with the first aspect, in one possible implementation, the battery cell further includes a third tab, the tab pad further includes a third tab pad, and the third tab pad is electrically connected to the third tab. The first connector includes a first positive terminal and a second positive terminal, and the second connector includes a first negative terminal and a second negative terminal. The first and third tabs are positive tabs, and the second tab is a negative tab. The battery circuit board assembly includes a first conductive circuit and a second conductive circuit disposed on the battery circuit board. The first end of the first conductive circuit is electrically connected to the first tab, the second end of the first conductive circuit is electrically connected to the third tab, the third end of the first conductive circuit is electrically connected to the first positive terminal of the first connector, and the fourth end of the first conductive circuit is electrically connected to the second positive terminal of the first connector. The first end of the second conductive circuit is electrically connected to the second tab, the second end of the second conductive circuit is electrically connected to the first negative terminal of the second connector, and the third end of the second conductive circuit is electrically connected to the second negative terminal of the second connector. It can be understood that by setting the ports of the first connector and the first interface as positive terminals, and the ports of the second connector and the second interface as negative terminals. The terminal can be powered on only when the first connector and the first interface are engaged, and the second connector and the second interface are engaged. This eliminates the need for additional control circuits, significantly reduces the number of components, and effectively reduces costs.

[0014] In a second aspect, embodiments of the present application provide a terminal comprising a mainboard and a battery assembly. The battery assembly comprises a battery cell and a battery circuit board assembly. The battery cell comprises a main body and a top seal. The top seal is disposed in a curved shape on the top surface of the main body, from which the first and second tabs of the battery cell extend. The battery circuit board assembly comprises a battery circuit board, tab pads, a first connector, and a second connector. The battery circuit board comprises a main body and an extension extending outward from the main body, the extension being curved relative to the main body. The tab pads are disposed on the main body and mate with at least a portion of the top seal. The tab pads include at least a first tab pad and a second tab pad, the first tab pad being electrically connected to the first tab, and the second tab pad being electrically connected to the second tab. A first connector is disposed on the extension and electrically connected to the first tab pad, and the first connector is used to connect to the mainboard. A second connector is disposed on the extension and electrically connected to the second tab pad, and the second connector is used to connect to the mainboard. The battery protection module is electrically connected to at least one of the first and second connectors. The mainboard includes a battery protection module, and the battery protection module is electrically connected to at least one of the first connector and the second connector.

[0015] In conjunction with the second aspect, in one possible implementation, the mainboard further includes a main control circuit board, and a load module, a charge and discharge module, a current detection element, a first interface, and a second interface disposed on the main control circuit board. The battery protection module is disposed on the main control circuit board. The charge and discharge module is electrically connected to the load module, the charge and discharge module is used to connect to a power supply, and the charge and discharge module is used to control the charging and discharging of the battery assembly. The first end of the current detection element is electrically connected to the first end of the battery protection module, and the second end of the current detection element is connected to ground. The first interface is used to mate with the first connector, and the second interface is used to mate with the second connector.

[0016] In combination with the second aspect, in a possible implementation, the first end of the current detection element is further connected to the charge and discharge module.

[0017] In conjunction with the second aspect, in one possible implementation, the first interface includes a positive terminal and a negative terminal, the second interface includes a positive terminal and a negative terminal, and the second end of the battery protection module is electrically connected to the negative terminal of the first interface and the negative terminal of the second interface, respectively.

[0018] In conjunction with the second aspect, in one possible implementation, the main control circuit board includes a first circuit board, a second circuit board, and a frame board. The first circuit board includes a first surface and a second surface disposed in opposite directions, with the first surface being the side facing away from the second circuit board. The second circuit board includes a third surface and a fourth surface, with the fourth surface being the side facing away from the first circuit board. The frame board is disposed between the first and second circuit boards, such that the second and third surfaces are spaced apart. Components of the battery protection module are disposed on one or more of the first, second, third, or fourth surfaces.

[0019] In combination with the second aspect, in a possible implementation, the battery protection module is integrated into the charging and discharging module.

[0020] In conjunction with the second aspect, in one possible implementation, the mainboard further includes a charging module, which is disposed on the main control circuit board. The charging module is configured to control the charging of the battery assembly. A first end of the charging module is electrically connected to the positive terminal of the second interface, and a second end of the charging module is electrically connected to a port of the charging and discharging module for connecting to a power supply.

[0021] In conjunction with the second aspect, in one possible implementation, the battery cell includes a first battery cell path and a second battery cell path. When the battery cell is discharging, the charge-discharge module supplies power to the load module via the first connector and the first interface. When the battery cell is charging, the charge-discharge module charges the first battery cell path via the first connector and the first interface, and the charging module charges the second battery cell path via the second connector and the second interface.

[0022] In conjunction with the second aspect, in one possible implementation, the mainboard includes a switch unit, wherein a first end of the switch unit is electrically connected to the positive terminal of the first interface, and a second end of the switch unit is electrically connected to the positive terminal of the second interface. In response to the first connector being electrically connected to the first interface, the charge-discharge module supplies power to the load module via the first connector. In response to the second connector not being electrically connected to the second interface, the switch unit is turned off. In response to the first connector being electrically connected to the first interface and the second connector being electrically connected to the second interface, the load module controls the switch unit to turn on.

[0023] In combination with the second aspect, in a possible implementation, the switch unit includes a switch tube, or the switch unit is a chip.

[0024] In conjunction with the second aspect, in one possible implementation, the battery circuit board assembly includes a detection module, the second connector includes a detection end, and the detection module is electrically connected to the detection end of the second connector. The detection module is used to monitor the battery cell and generate detection information. The second interface includes a detection end, and the load module is electrically connected to the detection end of the second interface. When the second connector is plugged into the second interface, the detection end of the second connector is electrically connected to the detection end of the second interface. In response to the load module not receiving the detection information, it is determined that the second connector is not electrically connected to the second interface.

[0025] In combination with the second aspect, in a possible implementation, the detection module is a negative temperature coefficient thermistor (NTC), and the detection information is the temperature of the battery cell.

[0026] In conjunction with the second aspect, in a possible implementation, the detection module is an encryption chip, and the detection information is the product serial number of the battery cell.

[0027] In combination with the second aspect, in a possible implementation, the switch unit is integrated into the charging module.

[0028] In conjunction with the second aspect, in one possible implementation, the mainboard includes a logic module, wherein a first input terminal of the logic module is electrically connected to the positive terminal of the first interface, a second input terminal of the logic module is electrically connected to the positive terminal of the second interface, and an output terminal of the logic module is electrically connected to the control terminal of the switch unit. When the first interface is electrically connected to the first connector, the first input terminal is a high-level signal, and when the second interface is electrically connected to the second connector, the second input terminal is a high-level signal. In response to the output of the logic module being a high-level signal, the switch unit is turned on, and in response to the output of the logic module being a low-level signal, the switch unit is turned off.

[0029] In a third aspect, embodiments of the present application provide a terminal. The terminal includes a mainboard and a battery assembly. The mainboard includes a battery protection module, and the battery assembly includes battery cells and a battery circuit board assembly. The battery cell includes a cell body and a top seal. The top seal is disposed in a curved shape on the top surface of the cell body, from which the first and second tabs of the cell are extended. The battery circuit board assembly includes a battery circuit board, tab pads, a first connector, and a second connector. The battery circuit board includes a main body and an extension extending outward from the main body, the extension being curved relative to the main body. The tab pads are disposed on the main body and mate with at least a portion of the top seal. The tab pads include at least a first tab pad and a second tab pad, the first tab pad being electrically connected to the first tab, and the second tab pad being electrically connected to the second tab. A first connector is disposed on the extension and electrically connected to the first tab pad. The first connector is connected to the mainboard. A second connector is disposed on the extension and electrically connected to the second tab pad. The second connector is connected to the mainboard. The battery protection module is electrically connected to at least one of the first and second connectors. The battery cell also includes a third tab, and the tab pad further includes a third tab pad, which is electrically connected to the third tab. The first connector includes a first positive terminal and a second positive terminal, and the second connector includes a first negative terminal and a second negative terminal. The first and third tabs are positive tabs, and the second tab is a negative tab. The battery circuit board assembly includes a first conductive circuit and a second conductive circuit disposed on the battery circuit board. The first end of the first conductive circuit is electrically connected to the first tab, the second end of the first conductive circuit is electrically connected to the third tab, the third end of the first conductive circuit is electrically connected to the first positive terminal of the first connector, and the fourth end of the first conductive circuit is electrically connected to the second positive terminal of the first connector. The first end of the second conductive circuit is electrically connected to the second tab, the second end of the second conductive circuit is electrically connected to the first negative terminal of the second connector, and the third end of the second conductive circuit is electrically connected to the second negative terminal of the second connector. The mainboard includes a main control circuit board, as well as a load module, a charge-discharge module, a charging module, a current sensing element, a first interface, a second interface, and a third conductive circuit disposed on the main control circuit board. The battery protection module is arranged on the main control circuit board. The charge and discharge module is electrically connected to the load module, and the charge and discharge module is used to connect to the power supply, and the charge and discharge module is used to control the charging and discharging of the battery assembly. The first end of the charging module is connected to one end of the charge and discharge module connected to the power supply. The first interface is used to cooperate with the first connector, and the first interface includes a first positive terminal and a second positive terminal. The second interface is used to cooperate with the second connector, and the second interface includes a first negative terminal and a second negative terminal. The first end of the third conductive circuit is electrically connected to the first positive terminal of the first interface, the second end of the third conductive circuit is electrically connected to the positive terminal of the first interface, the third end of the third conductive circuit is electrically connected to the charge and discharge module, and the third end of the third conductive circuit is electrically connected to the second end of the charging module.A fourth conductive circuit, wherein a first end of the fourth conductive circuit is electrically connected to the first negative end of the second interface, a second end of the fourth conductive circuit is electrically connected to the second negative end of the second interface, and a third end of the fourth conductive circuit is electrically connected to the battery protection module.

[0030] In addition, the technical effects brought about by any possible implementation method in the second to third aspects can refer to the technical effects brought about by different implementation methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic diagram of a terminal provided in an embodiment of the present application.

[0032] FIG2 is a schematic diagram of the battery cell in FIG1 .

[0033] FIG3 is a schematic diagram of a battery assembly connected to a mainboard.

[0034] FIG4 is a schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0035] FIG5 is a schematic diagram of the battery circuit board assembly in FIG4 .

[0036] FIG6 is a schematic diagram of the battery assembly in FIG4 .

[0037] FIG7 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0038] FIG8 is a schematic diagram of the third conductor line in FIG5 .

[0039] FIG. 9 is another schematic diagram of the third conductor circuit in FIG. 5 .

[0040] FIG10 is a schematic diagram of the battery connector and interface in FIG4 .

[0041] FIG11 is a schematic diagram of the mainboard in FIG4 .

[0042] FIG12 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0043] FIG13 is a schematic diagram of the battery circuit board in FIG12 .

[0044] FIG14 is a schematic diagram of the charge and discharge module in FIG12 .

[0045] FIG15 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0046] FIG16 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0047] FIG17 is a schematic diagram of the switch unit in FIG16 .

[0048] FIG18 is another schematic diagram of the switch unit in FIG16 .

[0049] Figure 19 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0050] Figure 20 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0051] Figure 21 is a schematic diagram of the logic module provided in an embodiment of the present application.

[0052] Figure 22 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0053] Figure 23 is another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0055] It is understood that the connection relationships described in this application refer to direct or indirect connections. For example, the connection between A and B can be either a direct connection between A and B or an indirect connection between A and B via one or more other electrical components. For example, A and C can be directly connected, and C can be directly connected to B, so that A and B are connected through C. It is also understood that the description of "A connecting to B" in this application can be a direct connection between A and B or an indirect connection between A and B via one or more other electrical components.

[0056] In the description of this application, unless otherwise specified, " / " means "or". For example, A / B can mean A or B. In this document, "and / or" is simply a way to describe the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0057] In the description of this application, words such as "first" and "second" are used only to distinguish different objects and do not limit the quantity or execution order. In addition, words such as "first" and "second" do not necessarily mean different. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0058] The technical solution of the present application is further described in detail below with reference to the accompanying drawings.

[0059] The embodiment of the present application outputs a terminal. The terminal includes electronic products with rechargeable batteries such as mobile phones, tablet computers (pads), televisions, smart wearable products (for example, smart watches, smart bracelets), virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, etc. The above-mentioned terminal can also be a rechargeable small household appliance (for example, a soymilk machine, a sweeping robot), a drone, and other electronic products. The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned terminal. For the convenience of explanation, the following description is based on the example of a mobile phone as shown in Figure 1.

[0060] As shown in Figure 1, the terminal 01 may mainly include a display screen 10, a middle frame 11, and a rear cover 12. The display screen 10 is arranged on a side of the middle frame 11 away from the rear cover 12. In some embodiments of the present application, the display screen 10 may be a self-luminous display screen, for example, an organic light emitting diode (OLED) display screen. Alternatively, in other embodiments of the present application, the display screen 10 may also be a liquid crystal display (LCD). The present application does not limit the type of the display screen 10.

[0061] In addition, as shown in Figure 1, the terminal 01 may also include a motherboard 13, a battery assembly 20, and components 14. The motherboard 13 and the battery assembly 20 are arranged on the surface of the middle frame 11 on the side close to the rear shell 12. The components 14 are arranged on the surface of the motherboard 13 on the side close to the rear shell 12. For example, the motherboard 13 may be a printed circuit board (PCB). The components 14 may be a central processing unit (CPU), an application processor (AP), or a system on chip (SOC). Based on this, after the rear shell 12 is fastened to the middle frame 11, a receiving cavity for accommodating the motherboard 13, components 14, and battery assembly 20 can be formed between the rear shell 12 and the middle frame 11. In this way, the probability of external moisture, oxygen, dust, etc. entering the receiving cavity can be reduced, thereby protecting the components located in the receiving cavity.

[0062] As shown in Figure 1, the battery assembly 20 may include a battery cell 21 and a battery circuit board assembly 22. The battery cell 21 is used to power the electronic components in the terminal 01. For example, the battery cell 21 may be a soft-pack battery cell. In this case, as shown in Figure 2, the battery cell 21 may include a battery cell body 210, tabs 211 disposed on the battery cell body 210, and a packaging film 212 that wraps around the battery cell body 210. It is understood that the tabs 211 include at least one positive tab and at least one negative tab.

[0063] In some embodiments of the present application, the packaging film 212 may be an aluminum-plastic film. The packaging film 212 can be sealed on the top surface A and side surface B of the cell body 210. The packaging film 212 seals the top surface A of the cell body 210 to form a top seal 2121. The tabs 211 can be extended from the packaging film 212 via the top seal 2121.

[0064] It should be noted that, in the embodiment of the present application, the top surface A of the battery cell body 210 refers to the surface of the battery cell body 210 from which the tab 211 is extended. In this case, the side surface B of the battery cell body 210 refers to the surface adjacent to the top surface A. It can be understood that, when there is sufficient component space for the battery assembly 20 in the terminal 01, the more tabs there are, the more conducive it is to reducing the impedance of the battery assembly 20 during the charging and discharging process. The present application does not limit the number of tabs. For the sake of convenience, the following embodiment is described by taking the battery cell 21 as an example, in which it includes two positive tabs and one negative tab. For example, the first tab 211a shown in FIG. 2 is a positive tab, the second tab 211b is a negative tab, and the third tab 211c is a positive tab.

[0065] Please refer to Figure 3, which shows a schematic diagram of a battery assembly connected to a mainboard. The battery assembly 20a includes a battery cell 21a and a battery circuit board assembly 22a.

[0066] Among them, the battery cell 21a includes: a battery cell body 210, a top seal portion 2121, and a tab 211 led out from the top seal portion 2121. The top seal portion 2121 is arranged on the top surface A of the battery cell body 210, and the top seal portion 2121 is arranged perpendicularly or approximately perpendicularly to the top surface A. After being led out from the top seal portion 2121, the tab 211 is bent along the Y-axis toward the battery cell body 210. A buffer pad 30 is also provided between the bent portion of the tab 211 and the top seal portion 2121. It can be understood that the Y-axis direction is the length direction along the battery cell body 210 in Figure 3, and the Z-axis direction is the direction perpendicular to the battery cell body 210.

[0067] The battery circuit board assembly 22a includes: a battery circuit board, a tab pad 221, a connector 222, and a battery protection module 223. The battery circuit board includes a first battery circuit board 220_1 and a second battery circuit board 220_2. The battery protection module 223 is disposed between the first battery circuit board 220_1 and the second battery circuit board 220_2. The tab pad 221 is disposed on a surface of the second battery circuit board 220_2 away from the battery protection module 223, and the tab pad 221 is disposed in contact with the bent tab 211. The connector 222 is disposed on a surface of the first battery circuit board 220_1 near the battery protection module 223. The connector 222 is used to electrically connect to the mainboard 13. For example, the mainboard 13 is provided with an interface 131, which is configured to plug into the connector 222, thereby electrically connecting the battery circuit board assembly 22a to the mainboard 13.

[0068] As shown in Figure 3, the distance between the top surface A of the battery cell body 210 and the main board 13 along the Y-axis is a first distance H1. Because the battery protection module 223 is disposed on the battery circuit board, the first distance H1 is often greater than the length of the battery protection module 223 along the Y-axis. As a result, the space between the battery cell body 210 and the main board 13, that is, the head space of the battery cell 20a, is mostly occupied by the battery protection module 223, reducing the potential space of the battery cell body 210 and thus affecting the battery life of the terminal 01.

[0069] In response to the above problems, an embodiment of the present application provides a terminal that can reduce the head space of the battery cell to increase the volume of the battery cell body, thereby increasing the battery life of the terminal.

[0070] The terminal provided in this application includes a motherboard and a battery assembly. The motherboard includes a battery protection module, and the battery assembly includes battery cells and a battery circuit board assembly. The battery cell includes a cell body and a top seal. The top seal is bent and disposed on the top surface of the cell body, from which the first and second tabs of the cell are extended. The battery circuit board assembly includes a battery circuit board, tab pads, a first connector, and a second connector. The battery circuit board includes a main body and an extension extending outward from the main body, the extension being bent relative to the main body. The tab pads are disposed on the main body and mate with at least a portion of the top seal. The tab pads include at least a first tab pad and a second tab pad, the first tab pad being electrically connected to the first tab, and the second tab pad being electrically connected to the second tab. A first connector is disposed on the extension and electrically connected to the first tab pad, and is used to connect to the motherboard. A second connector is disposed on the extension and electrically connected to the second tab pad, and is used to connect to the motherboard. The battery protection module is electrically connected to at least one of the first and second connectors.

[0071] An embodiment of the present application further provides a battery assembly, which is applied to the above-mentioned terminal.

[0072] The battery assembly and terminal provided in the embodiments of the present application place the battery protection module on the mainboard, reducing the impact of the battery protection module on the battery assembly volume. The top seal of the battery cell is bent to further compress the space above the battery cell, thereby increasing the capacity of the battery cell body and thereby extending the battery life of the terminal.

[0073] 4 , 5 and 6 , the battery assembly 20 includes a battery cell 21 and a battery circuit board assembly 22 as shown in FIG. 5 .

[0074] The battery cell 20 includes a battery cell body 210 and a top seal 2121. The top seal 2121 is arranged in a bent shape on the top surface A of the battery cell body 210. Exemplarily, the top seal 2121 extends from a direction perpendicular to the top surface A, that is, in the Y-axis direction, and then bends toward the surface where the top surface A is located. A buffer pad 30 is provided between the bent top seal 2121 and the top surface A. The tabs 211 of the battery cell 20 may be the first tabs 211a and the second tabs 221b shown in FIG6 , and the tabs 211 are led out from the top seal 2121. It can be understood that the Y-axis direction is the length direction along the battery cell body 210 in FIG4 , and the Z-axis direction is the direction perpendicular to the battery cell body 210. After being led out from the top seal 2121, the tabs 211 are bent downward along the Z-axis direction.

[0075] The battery circuit board assembly 22 includes a battery circuit board 220, a tab pad 221, and a connector 222. The battery circuit board 220 can be a flexible printed circuit (FPC) or a rigid board, and the connector 222 includes, for example, a first connector 222a and a second connector 222b. The battery circuit board 22 includes a main body 2201 and an extension 2202 extending outward from the main body 2201. It will be appreciated that in order to increase the size of the battery cell 21 within the limited component space of the terminal 01 and thereby improve the capacity of the battery cell 21, the extension 2202 is bent relative to the main body 2201. For example, the extension 220 of the battery circuit board 220 can be bent relative to the main body 2201 along the dotted line shown in FIG5 . As shown in FIG5 , the main body 2201 of the battery circuit board 220 can be bent until it is parallel or approximately parallel to the top surface A of the battery cell body 210. This allows the positive tab pad 221a and the negative tab pad 221b provided on the main body 2201 to face the top surface A of the battery cell body 210. At this time, the extension portion 2202 in the battery circuit board 220 can be parallel to the surface of the main board 13 (the XOY plane shown in Figure 5, which is parallel to the surface of the main board 13 in Figure 4). In this case, the main body 2201 and the extension portion 220 in the battery circuit board 220 can be perpendicular or approximately perpendicular. In one possible implementation, as shown in Figure 4, the extension portion 2202 is bent approximately 90° relative to the main body 2201.

[0076] The tab pads 221 are disposed on the surface of the main body 2201 and are in contact with at least a portion of the top seal 2121. As shown in Figures 5 and 6, the tab pads 221 include at least a first tab pad 221a and a second tab pad 221b. The first tab pad 221a is electrically connected to the first tab 211a, and the second tab pad 221b is electrically connected to the second tab 211b.

[0077] The first connector 222a is provided on the extension portion 2202, and the first connector 222a is electrically connected to the first tab pad 221a. The first connector 222a is used to connect to the mainboard 13. The second connector 222b is provided on the extension portion 2202, and the second connector 2202 is electrically connected to the second tab pad 221b. The second connector 221b is used to connect to the mainboard 13. Among them, the battery protection module 131 is electrically connected to at least one of the first connector 222a and the second connector 222b. As shown in Figure 4, illustratively, the mainboard 13 includes an interface 131, and the interface 131 is configured to be electrically connected to the connector 222, such as the first connector 222a or the second connector 222b. The mainboard 13 includes a conductive circuit (not shown in Figure 4), and the battery protection module 132 is electrically connected to the interface 131 via the conductive circuit. Thus, when the interface 131 is plugged into the connector 222 , the battery protection module 132 is electrically connected to the connector 222 (eg, the first connector 222 a or the second connector 222 b ) through the interface 131 .

[0078] As shown in Figure 4, along the Y-axis direction, the main body 2201, the tab pad 221, the top seal 2121, the buffer pad 30, and the top surface A of the battery cell body 210 are sequentially arranged. The distance between the top surface A of the battery cell body 210 and the main board 13 along the Y-axis direction is defined as the second distance H2. Compared with the battery assembly 20a shown in Figure 3, since the battery protection module 132 is arranged on the main board 13, the second distance H2 is smaller than the first distance H1. In this way, the space between the battery cell body 210 and the main board 13, that is, the head space of the battery cell 20a is smaller, and the saved space can be used to increase the capacity of the battery cell body 210, thereby increasing the battery life of the terminal 01.

[0079] As shown in Figures 5 and 6, in one embodiment, the battery cell 21 includes a first tab 211a, a second tab 211b, and a third tab 211c. The tab pads 221 include a first tab pad 221a, a second tab pad 221b, and a third tab pad 221c.

[0080] The first tab pad 221a is configured to be welded to the first tab 211a so that the two are electrically connected. The second tab pad 221b is configured to be electrically connected to the second tab 211b. The third tab pad 221c is configured to be electrically connected to the third tab 211c.

[0081] As shown in FIG5 , the battery circuit board 220 may include a main body 2201 and an extension 2202 extending outward from the main body 2201. Tab pads 221, such as a first tab pad 221a, a second tab pad 221b, and a third tab pad 221c, are disposed on the main body 2201. Furthermore, the tab pads 221 are configured to be welded to the tabs 211, such as the first tab 211a, the second tab 211b, and the third tab 211c, thereby electrically connecting the battery cell body 210 to the battery circuit board 220. From the above, it can be seen that the battery cell 21 can include two positive tabs (i.e., the first tab 211a and the second tab 211c) and one negative tab (i.e., the second tab 211b), so the circuit board protection component 22 can include two positive tab pads (i.e., the first tab pad 221a and the third tab pad 221c) and one negative tab pad (i.e., the second tab pad 221b).

[0082] Furthermore, a connector 222 is provided on the extension 2202 of the PFC 220. This connector 222 can be inserted into the interface 131 on the mainboard 13, thereby electrically connecting the battery circuit board 220 to the mainboard 13. It should be noted that this application does not limit the number of connectors 222. If there is sufficient space for the battery assembly 20 in the terminal 01, a greater number of connectors 222 will help reduce the impedance generated by the battery assembly 20 during charging and discharging.

[0083] The battery circuit board assembly 22 provided in an embodiment of the present application includes at least one connector 222. For example, when the battery circuit board assembly 22 includes a connector 222, the connector 222 can be electrically connected to the positive voltage terminal and the negative voltage terminal in the main board 13 at the same time through the connector interface on the main board 13 to form an electrical signal loop.

[0084] Alternatively, for another example, the battery circuit board assembly 22 may include two connectors, namely a first connector 222a and a second connector 222b, as shown in FIG4 . In some embodiments of the present application, the battery circuit board 220 may include two extensions, namely a first extension 2202a and a second extension 2202b, as shown in FIG6 . In this case, the first connector 222a may be disposed on the first extension 2202a, and the second connector 222b may be disposed on the second extension 2202b. Each connector 222 includes a positive terminal and a negative terminal. For example, the first connector 222a includes a positive terminal P+ and a negative terminal P-, and the second connector 222b includes a positive terminal P+ and a negative terminal P-. In this case, the battery circuit board assembly 22 includes a first conductive trace L1, a second conductive trace L2, and a third conductive trace L3, disposed on the battery circuit board 220. The first end of the first conductive trace L1 is electrically connected to the first tab pad 221a, and the second end of the first conductive trace L1 is electrically connected to the positive terminal P+ of the first connector 222a. The first end of the second conductive line L2 is electrically connected to the third tab pad 221c, and the second end of the second conductive line L2 is electrically connected to the positive terminal P+ of the second connector 222b. The first end of the third conductive line L3 is electrically connected to the second tab pad 221b, the second end of the third conductive line L3 is electrically connected to the negative terminal P- of the first connector 222a, and the third end of the third conductive line L3 is electrically connected to the negative terminal P- of the second connector 222b.

[0085] In this case, the positive terminal P+ in the first connector 222a and the positive terminal P+ in the second connector 222b can be electrically connected to the positive voltage terminal in the main board 13, and the negative terminal P- in the first connector 222a and the negative terminal P- in the second connector 222b can be electrically connected to the negative voltage terminal in the main board 13, thereby forming an electrical signal loop.

[0086] As shown in FIG6 , the first tab pad 221 a (positive tab pad) is welded to the first tab 211 a (positive tab). Similarly, the second tab pad 221 b (negative tab pad) is welded to the second tab 211 b (negative tab), and the third tab pad 221 b (positive tab pad) is welded to the third tab 211 c (positive tab).

[0087] As shown in FIG5 , in one embodiment, the battery circuit board assembly 22 includes a battery protection unit 224, which is disposed on the battery circuit board 220, for example, on the main body 2201. The battery protection unit 224 is disposed at the connection between the first end of the third conductive trace L3 and the second tab pad 221b.

[0088] In this embodiment, the battery protection unit 224 is a minimum primary protection module circuit. By providing the battery protection unit 224 , a short circuit of the connector 222 can be prevented during transportation and assembly of the battery cell 21 .

[0089] Typically, the components within the battery protection unit 224 are relatively low, for example, with a height of less than 0.4 mm, and not exceeding the height of the tab pads 221 after welding, that is, not exceeding the welding height of the first tab pad 221a, the welding height of the second tab pad 221b, and the welding height of the third tab pad 221c. In this way, the battery protection unit 224 can be placed between any two of the first tab pad 221a, the second tab pad 221b, and the third tab pad 221c without affecting the size of the second distance H2 in FIG. 4 .

[0090] In one possible implementation, the battery protection unit 224 is a current fuse. Once a short circuit occurs in the connector 222, for example, when the positive terminal P+ of the first connector 222a contacts the negative terminal P- of the second connector 222b, the current fuse may burn out and cut off the current path, thereby preventing the battery circuit board assembly 22 from burning.

[0091] In one possible implementation, the battery protection unit 224 is a protection switch transistor. A first end of the protection switch transistor is electrically connected to the first end of the third conductive line L3, and a second end of the protection switch transistor is electrically connected to the second tab pad 221b. In response to a short circuit in the battery assembly 20, the protection switch transistor is turned off. Exemplarily, in this implementation, the mainboard 13 should also include a driver for the protection switch transistor connected to the third end of the protection switch transistor, and a control unit connected to the driver of the protection switch transistor. The control unit is capable of detecting whether a short circuit has occurred in the battery assembly 20. In response to the control unit detecting a short circuit in the battery assembly 20, the control unit outputs a first drive signal to the driver unit to turn off the protection switch transistor. In response to the battery assembly 20 restoring its circuit, the control unit outputs a second drive signal to the driver unit to turn on the protection switch transistor. As shown in FIG. 7 , the control unit and the driver unit may be integrated into the battery protection module 132 on the mainboard 13.

[0092] In one possible implementation, the battery protection unit 224 is disposed on the main body 2201 and is disposed in the area between any two of the first electrode pad 221a, the first electrode pad 221b, and the first electrode pad 221b. In this way, the battery protection unit 224 does not occupy space on the main board 13.

[0093] Referring also to FIG8 , in one possible implementation, the third conductive circuit L3 includes a metal layer L3_1 and a flame-retardant layer L3_2. The flame-retardant layer L3_2 is disposed on the surface of the battery circuit board 220, and the metal layer L3_1 is disposed on the surface of the flame-retardant layer L3_2. Exemplarily, the flame-retardant layer L3_2 is made of polyimide (PI), and the metal layer L3_1 is made of copper.

[0094] Please refer to FIG. 9 , the width A1 of the low-resistance region S1 is smaller than the width A2 of the high-resistance region S2 .

[0095] By controlling the width of the third conductive trace L3 and keeping the impedance within a certain range, a function similar to a current fuse can be achieved. The maximum charging and discharging currents can flow normally. However, if the connector 222 shorts, this section of trace L3 will heat up, burning the flame-retardant layer L3_2 and cutting off the current, preventing the battery cell 21 from overheating and burning.

[0096] In a possible implementation, the first connector 222a or the second connector 222a, and the corresponding first interface 131a and second interface 132a all adopt a special structure to avoid a short circuit of the connector 222 during transportation and assembly.

[0097] Please refer to Figure 10 , which illustrates a connector 80 and an interface 90. The connector 80 is compatible with the aforementioned connector 222, such as one or more of the first connector 222a or the second connector 222a. The interface 90 is compatible with the aforementioned interface 131, such as one or more of the first interface 131a or the second interface 132a. The connector 80 includes a first housing 81 and a first power terminal 82. The first housing 81 includes a first sidewall 811 and a plurality of first abutting portions 812 extending from the first sidewall 811 in a first direction (e.g., the positive half-axis direction of the X-axis in the figure). The first power terminal 82 is formed between two adjacent first abutting portions 812. Two opposing first power terminals 82 are disposed between the two adjacent first abutting portions 812, and a plug-in gap 821 is formed between the two first power terminals 82. The height of the first power terminal 82 along the first direction is lower than the height of the first abutting portions 812. The first housing 81 is a plastic insulator, and the first power terminal 82 is made of a conductive material.

[0098] The interface 90 includes a second housing 91 and a second power terminal 92. The second power terminal 92 is disposed within the second housing 91 and extends along a second direction (e.g., the negative x-axis direction in the figure). The second housing 91 is a plastic insulator, and the second power terminal 92 is made of a conductive material. When the connector 80 and the interface 90 are plugged together, the second power terminal 92 can be inserted into the plug-in gap 821, thereby electrically connecting the connector 80 and the interface 90.

[0099] In one possible implementation, the two first abutting portions 812 on either side of the first housing 81 can be recessed at one end away from the first power terminal 82 to form a groove 8121. Accordingly, second abutting portions 911 can be formed on both sides of the second housing 91. When the connector 80 and the interface 90 are plugged in, the second abutting portions 911 can engage with the grooves 8121, thereby ensuring a more secure plug-in between the connector 80 and the interface 90.

[0100] It can be understood that by setting the first power terminal 82 to be lower than the height of the first abutting portion 812, even if the connector 80 overlaps the external metal layer, it will not cause a short circuit in the connector 80. The circuit can only be connected when the connector 80 and the interface 90 are plugged in.

[0101] It can be understood that any one or more of the above implementation methods, namely the implementation method of the current fuse, the implementation method of the protection switch tube, the implementation method of the control line width, and the implementation method of the special connector 222 structure, can be adopted without conflict.

[0102] Please refer to Figures 11 and 12 together. Figure 11 is a schematic diagram of the mainboard 13 in Figure 4. Figure 12 is a schematic diagram of the connection between the mainboard 13 and the battery assembly 20 in Figure 4.

[0103] The mainboard 13 includes a main control circuit board 130 , and a first interface 131 a , a second interface 131 b , a battery protection module 132 , a load module 133 , a charge and discharge module 134 , and a current detection element 135 disposed on the main control circuit board 130 .

[0104] The first interface 131a is used to mate with the first connector 222a, and the second interface 131b is used to mate with the second connector 222b. The first interface 131a includes a positive terminal P+ and a negative terminal P-, and the second interface 131b includes a positive terminal P+ and a negative terminal P-.

[0105] The charge and discharge module 134 is electrically connected to the load module 133. For example, the charge and discharge module 134 can supply power to the load module 133 through the line VBAT_SYS. The charge and discharge module 134 is used to connect to a power supply (not shown) to receive power, and the charge and discharge module 134 is used to control the charging and discharging of the battery assembly 20. Exemplarily, the charge and discharge module 134 is electrically connected to the positive terminal P+ of the first connector 222a through the first interface 131a, and is electrically connected to the positive terminal P+ of the second connector 222b through the second interface 131b. In this case, the battery protection module 132 is electrically connected to the negative terminal P- of the first connector 222a through the first interface 131a, and is electrically connected to the negative terminal P- of the second connector 222b through the second interface 131b.

[0106] A first end of the current-sensing element 135 is electrically connected to a first end of the battery protection module 132 , and a second end of the current-sensing element 135 is connected to the ground.

[0107] In one possible implementation, the current-sensing element 135 may be a resistor. In this case, the battery protection module 132 may collect the voltage between the first and second terminals of the current-sensing element 135 and calculate the current flowing through the current-sensing element 135 based on the known resistance value of the current-sensing element 135.

[0108] In this case, the battery protection module 132 can compare the current flowing through the current-sensing element 135 with a preset current threshold. For example, the preset current threshold may include an overcurrent threshold. When the battery protection module 132 calculates that the current flowing through the current-sensing element 135 exceeds the overcurrent threshold, the switch within the battery protection module 132 can be controlled to disconnect, thereby disconnecting the first interface 131a and the second interface 131b from the ground. At this time, the battery cell 210 cannot be charged or discharged, thereby protecting the battery cell 210. In addition, the battery protection module 132 can compare the current flowing through the current-sensing element 135 with the preset current threshold to prevent the battery cell 21 from being in an overcharged, over-discharged, short-circuited, or other state. The control process is the same as described above and will not be repeated here.

[0109] In some embodiments, the first end of the current-sensing element 135 is further connected (not shown) to the charge-discharge module 134. It will be appreciated that the charge-discharge module 134 also generally includes a current-sensing element. In other words, the battery protection module 132 and the charge-discharge module 134 can share a current-sensing element 135, thereby reducing the number of components on the mainboard 130. It will be appreciated that the implementation of the current-sensing element 135 for protection of the charge-discharge module 134 is similar to that of the battery protection module 132 and will not be further described here.

[0110] Referring also to FIG. 13 , in some embodiments, main control circuit board 130 includes a first circuit board 1301, a second circuit board 1302, and a frame board 1303. First circuit board 1301 includes a first surface 13011 and a second surface 13012 facing each other. First surface 13011 is the side facing away from second circuit board 1302. Second circuit board 1302 includes a third surface 13021 and a fourth surface 13022. Fourth surface 13022 is the side facing away from first circuit board 1301. Frame board 1303 is disposed between first circuit board 1301 and second circuit board 1302, such that second surface 13012 and third surface 13021 are spaced apart. Frame board 1303 is, for example, disposed along the edges of first circuit board 1301 and second circuit board 1302. Frame board 1303, first circuit board 1301, and second circuit board 1302 collectively define a receiving cavity 1304. The accommodating cavity 1304 may be used to place components, such as the battery protection module 132 .

[0111] In these embodiments, the components of the battery protection module 132 are disposed on one or more of the first surface 13011, the second surface 13012, the third surface 13021, or the fourth surface 13022. As shown in FIG12 , the dotted lines indicate locations where the battery protection module 132 may be disposed. For example, the battery protection module 132 may be disposed in one or more of the first placement area 1321, the second placement area 1322, the third placement area 1323, and the fourth placement area 1324.

[0112] It can be understood that in these embodiments, the battery protection module 132 can be composed of discrete components. In this way, the components in the battery protection module 132 can be dispersed on different surfaces of the multi-layer circuit board for flexible arrangement.

[0113] Of course, in some embodiments, the main control circuit board 130 can also be a double-sided board, and the battery protection module 132 can be installed on one or both sides of the main control circuit board. Alternatively, the main control circuit board 130 can be a circuit board with multiple layers, but generally, due to the thickness of the terminal 01, the main control circuit board 130 is generally arranged on two or four sides.

[0114] Referring also to Figure 14 , in some embodiments, the battery protection module 132 is integrated into the charge-discharge module 134 . This further reduces the number of components on the motherboard 13 and reduces layout space. In this case, the volume of the motherboard 13 can be reduced, allowing more space to increase the capacity of the battery cell 210 and improve the battery life of the terminal 01 .

[0115] Referring also to FIG. 15 , in some embodiments, the mainboard 13 further includes a charging module 136. The charging module 136 is disposed on the main control circuit board 130 and is used to control the charging of the battery assembly 20. A first end of the charging module 136 is electrically connected to the positive terminal P+ of the second interface 131, and a second end of the charging module 136 is electrically connected to the power supply port of the charge-discharge module 134.

[0116] It can be understood that in one possible implementation, the charging module 136 is a charging chip.

[0117] In a dual battery connector architecture (e.g., first connector 222a and second connector 222b) and dual charging modules (e.g., charge-discharge module 134 and charging module 136), the positive terminals P+ and negative terminals P- of the two connectors are typically connected in parallel. After the first connector 222a engages with the first interface 131a, the second interface 131b is already energized. Consequently, significant misalignment occurs during the engagement of the second connector 222b and the second interface 131b, causing the negative terminal of one of the second connector 222b and the second interface 131b to contact the positive terminal of the other, thereby causing a short circuit and even damaging the battery cell 21 due to the high current.

[0118] Please also refer to FIG. 16 . In some embodiments, the mainboard 13 includes a switch unit 137 . A first end of the switch unit 137 is electrically connected to the positive terminal P+ of the first interface 131a , and a second end of the switch unit 137 is electrically connected to the positive terminal P+ of the second interface 131b . In response to the electrical connection between the first connector 222a and the first interface 131a , the charge-discharge module 134 can supply power to the load module 133 via the line (e.g., VBAT1+) on which the first interface 131a resides. In response to the lack of electrical connection between the second connector 222b and the second interface 131b , the switch unit 137 is turned off. In response to the electrical connection between the first connector 222a and the first interface 131a , and the electrical connection between the second connector 222b and the second interface 131b , the load module 133 controls the switch unit 137 to be turned on.

[0119] Exemplarily, the load module 133 includes a general-purpose input / output (GPIO) port. The first connector 222a, the first interface 131a, the second connector 222b, and the second interface 131b all include a functional terminal F. The functional terminal F is disposed between the positive terminal and the negative terminal. Taking the first connector 222a as an example, the functional terminal F is disposed between the positive terminal P+ of the first connector 222a and the negative terminal P- of the first connector 222a. The GPIO port is electrically connected to the functional terminal F of the first interface 131a, the functional terminal F of the first connector 222a is electrically connected to the functional terminal F of the second connector 222b, and the functional terminal F of the second interface 131b is electrically connected to the control terminal of the switch unit 137. The connection line between the GPIO port of the load module 133 and the functional terminal F of the first interface 131a, the connection line between the functional terminal F of the first connector 222a and the functional terminal F of the second connector 222b, and the connection line between the functional terminal F of the second interface 131b and the switch unit 137 together constitute a switch control network 1371.

[0120] The load module 133 is electrically connected to the functional terminal F of the first interface 131a and can detect whether the first interface 131a and the first connector 222a are engaged. When the load module 133 detects that the first interface 131a and the first connector 222a are electrically connected (i.e., engaged), the charge and discharge module 134 can power the battery cell 21 through the first connector 222a and the line (VBAT1+) where the first interface 131a is located. When the load module 133 detects that the first interface 131a and the first connector 222a are not electrically connected (i.e., not engaged), the switch unit 137 is in the off state by default.

[0121] When the first interface 131a and the first connector 222a are engaged, the load module 133 is electrically connected to the second connector 222b because the functional end F of the first interface 131a and the functional end F of the first connector 222a are electrically connected. Furthermore, the load module 133 can detect whether the second connector 222a and the second interface 131 are engaged. When the load module 133 simultaneously detects that the first interface 131a and the first connector 222a are electrically connected (i.e., engaged), and the second interface 131b and the second connector 222b are electrically connected (i.e., engaged), the load module 133 controls the switch unit 137 to conduct. For example, the load module 133 outputs a drive signal to the switch unit 137 to turn on the switch unit 137.

[0122] In one possible implementation, the battery circuit board assembly 22 includes a fourth conductive line L0 disposed on the battery circuit board. A first end of the fourth conductive line L0 is electrically connected to the first conductive line L1, and a second end of the fourth conductive line L0 is electrically connected to the second conductive line L1. It will be appreciated that the provision of the fourth conductive line L0 can facilitate current sharing between the left and right paths (i.e., the path containing the first conductive line L1 and the second conductive line L1).

[0123] Please also refer to FIG. 17 . In some embodiments, the switch unit 137 includes a switch tube.

[0124] Specifically, the switch unit 137 includes a switch tube Q1 and a switch tube Q2, wherein the switch tube Q1 is an N-type metal oxide semiconductor (NMOS), the switch tube Q2 is two P-type metal oxide semiconductors (PMOS) connected in series, and the switch tube Q21 and the switch tube Q22.

[0125] Exemplarily, the switch unit 137 further includes a resistor R1, a resistor R2, a resistor R3, and a capacitor C1. The first end of the resistor R2 is used to connect to the GPIO terminal (see FIG16 ) and receive the output voltage Vout, as well as to connect to the gate of the switch tube Q1. The second end of the resistor R2 is connected to the ground. The source of the switch tube Q1 is connected to the ground, and the drain of the switch tube Q1 is electrically connected to the first end of the resistor R3. The second end of the resistor R3 is electrically connected to the first end of the resistor R1 and the gate of the switch tube Q2, respectively. The second end of the resistor R1 is electrically connected to the drains of the switch tubes Q21 and Q22. The source of the switch tube Q21 is electrically connected to the first interface 133a, that is, electrically connected to the first positive power supply line VBAT1+. The source of the switch tube Q22 is electrically connected to the first interface 133b, that is, electrically connected to the second positive power supply line VBAT2+.

[0126] Among them, the resistor R2 is a pull-down resistor, and the GPIO end of the load module 133 outputs a low-level signal by default, that is, Vout is low. In this way, the gate of the switch tube Q1 (N-type MOS tube) is pulled low, and the switch tube Q1 is turned off. When the terminal 01 is in the off state, when the first connector 222a and the first interface 131a are fastened, the first end of the switch unit 137 is connected to the positive terminal P+ of the first connector 222a through the first positive power supply line VBAT1+. The switch tube Q1 pulls up the voltage of the Vcon end through the resistor R1, the switch tube Q2 (P-type MOS tube) is turned off, and the second positive power supply line VBAT2+ has no voltage. In this case, even if the second connector 222b and the second interface 131b are misaligned and fastened, no short circuit or sparking will occur. Wait until the second connector 222b and the second interface 131b are correctly fastened. When terminal 01 is powered on, the GPIO terminal of the load module 133 outputs a high-level signal, i.e., Vout is high, the switch Q1 is turned on, thereby lowering the Vcon voltage and turning on the switch Q2. In this way, the battery cell 21 can be discharged through the second connector 222b and the second interface 131b.

[0127] Please also refer to FIG. 18 . In some embodiments, the switch unit 137 includes a chip U1 .

[0128] Chip U1 includes at least an output OUT terminal, an input IN terminal, an enable CTRL terminal, and a ground GND terminal. For example, the OUT terminal is connected to the first positive power supply line VBAT1+, and the IN terminal is connected to the second positive power supply line VBAT2+. The CTRL terminal is connected to one end of the resistor R4 and the GPIO terminal (see Figure 16) and receives the output voltage Vout. The other end of the resistor R4 is connected to ground, and the GND terminal is connected to ground.

[0129] Chip U1 is turned on when the CTRL terminal is at a high level, electrically connecting the IN terminal to the OUT terminal. It is turned off when the CTRL terminal is at a low level, electrically disconnecting the IN terminal from the OUT terminal. By default, chip U1 is turned off. In this case, the second interface 131b is de-energized, and engaging the second connector 222b with the second interface 131b will not cause a short circuit or spark.

[0130] Please refer to Figure 19 as well. In some embodiments, the battery circuit board assembly 22 includes a detection module 138, the second connector 222b includes a detection terminal F, and the detection module 138 is electrically connected to the detection terminal F of the second connector 222b. The detection module 138 is used to monitor the battery cell 21 and generate detection information. The second interface 131b includes a detection terminal F, and the load module 133 is electrically connected to the detection terminal F of the second interface 131b. After the second connector 222b is plugged into the second interface 131b, the detection terminal F of the second connector 222b is electrically connected to the detection terminal F of the second interface 131b. In response to not receiving the detection information generated by the detection module 138, the load module 133 determines that the second connector 222b is not electrically connected to the second interface 131b.

[0131] Exemplarily, the load module 133 includes a GPIO terminal and an input / output IO terminal. The GPIO terminal is electrically connected to the control terminal of the switch unit 137, for example, to the gate current of the switch tube Q1 in Figure 17, or to the CTRL terminal in Figure 18. The IO terminal is electrically connected to the second interface 131b. The detection terminal F of the second connector 222b is electrically connected to the detection module 138. When the second interface 131b is plugged into the second connector 222b, the detection terminal F of the second interface 131b is electrically connected to the detection terminal F of the second connector 222b. In this way, the IO terminal of the load module 133 is electrically connected to the detection module 138 to obtain detection information. If the load module 133 receives the detection information, it indicates that the detection terminal F of the second connector 222b is electrically connected to the detection terminal F of the second interface 131b, that is, the second connector 222b is engaged with the second interface 131b. Correspondingly, if the load module 133 does not receive the detection information, it indicates that the second connector 222b is not engaged with the second interface 131b.

[0132] It is understandable that the detection information varies depending on the detection module 138 .

[0133] In one possible implementation, the detection module 138 is a negative temperature coefficient thermistor (NTC). The detection information is the temperature of the battery cell 21. It can be understood that the detection module 138 is capable of detecting the temperature of the battery cell 21 and transmitting it to the load module 133 after the second connector 222b and the second interface 131b are engaged. If the load module 133 does not receive the detection information, it indicates that the second connector 222b and the second interface 131b are not engaged. If the load module 133 receives the detection information, it indicates that the second connector 222b and the second interface 131b are engaged.

[0134] In another possible implementation, the detection module 138 is an encryption chip. The detection information is the product serial number (SN) of the battery cell 21. It is understandable that the detection module 138 can obtain the product serial number SN of the battery cell 21 and transmit it to the load module 133 after the second connector 222b and the second interface 131b are engaged. If the load module 133 does not receive the detection information, it indicates that the second connector 222b and the second interface 131b are not engaged. If the load module 133 receives the detection information, it indicates that the second connector 222b and the second interface 131b are engaged.

[0135] Referring to Figures 20 and 21 , in one possible implementation, the mainboard 13 includes a logic module 139. A first input terminal IN1 of the logic module 139 is electrically connected to the positive terminal P+ of the first interface 131a, a second input terminal IN2 of the logic module 139 is electrically connected to the positive terminal P+ of the second interface 131b, and an output terminal OUT of the logic module 139 is electrically connected to the control terminal of the switch unit 137. When the first interface 131a is electrically connected to the first connector 222a, the first input terminal IN1 is a high-level signal. When the second interface 131b is electrically connected to the second connector 222b, the second input terminal IN2 is a high-level signal. In response to the output of the logic module 139 being a high-level signal, the switch unit 137 is turned on. In response to the output of the logic module 139 being a low-level signal, the switch unit 137 is turned off.

[0136] It is understood that the OUT terminal of the AND logic module 139 can only output a high-level signal when both the IN1 terminal and the IN2 terminal are at a high level. Therefore, by connecting the IN1 terminal and the IN2 terminal of the AND logic module 139 to the positive terminal P+ of the first interface 131a and the positive terminal P+ of the second interface 131b, respectively, and configuring the first interface 131a to output a high-level signal when it is engaged with the first connector 222a, and the second interface 131b to output a high-level signal when it is engaged with the second connector 222b, the switch unit 137 can be turned on when both connectors are engaged.

[0137] Referring also to Figure 22 , in some embodiments, the switch unit 137 is integrated into the charging module 136. This further reduces the number of components on the motherboard 13. In these embodiments, the switch unit 137 is electrically connected to the load module 133. For example, the switch unit 137 is electrically connected to the line VBAT_SYS to achieve electrical connection with the load module 133. The load module 133 can directly control the on and off of the switch unit 137.

[0138] Continuing with FIG. 22 , in some embodiments, the battery cell 21 includes a first battery cell path and a second battery cell path. When the terminal 01 is powered on, i.e., when the battery cell 21 is discharging, the charge-discharge module 134 supplies power to the load module 133 via the first connector 222a and the line (VBAT1+) where the first interface 131a is located. When the battery cell 21 is charging, the charge-discharge module 134 charges the first battery cell path via the first connector 222a and the line (VBAT1+) where the first interface 131a is located, and the charging module 136 charges the second battery cell path via the line (VBAT2+) where the second connector 222b and the second interface 131b are located.

[0139] It is understood that since the battery cell 21 and the motherboard 13 are in a discharged state during the assembly process, only the first cell path in the battery cell 21 is discharged through the first connector 222a. Therefore, the second interface 131b is not charged, and there is no risk of short circuit when the second connector 222b and the second interface 131b are fastened together.

[0140] It can be understood that in these embodiments, components such as the switch unit 137 and the detection module 138 can be omitted, thereby reducing the number of devices on the mainboard 13.

[0141] Referring to Figure 23, in some embodiments, the first connector 222a includes a first positive terminal P1+ and a second positive terminal P2+. The second connector 222b includes a first negative terminal P1- and a second negative terminal P2-. The first interface 131a includes a first positive terminal P1+ and a second positive terminal P2+, and the second interface 131b includes a first negative terminal P1- and a second negative terminal P2-.

[0142] The battery assembly 22 includes a first conductive circuit L1 and a second conductive circuit L2 disposed on a battery circuit board 220. A first end of the first conductive circuit L1 is electrically connected to the first tab 211a, a second end of the first conductive circuit L1 is electrically connected to the third tab 211c, a third end of the first conductive circuit L1 is electrically connected to the first positive terminal P1+ of the first connector 222a, and a fourth end of the first conductive circuit L1 is electrically connected to the second positive terminal P2+ of the first connector 222a. A first end of the second conductive circuit L2 is electrically connected to the second tab 211b, a second end of the second conductive circuit L2 is electrically connected to the first negative terminal P1- of the second connector 222b, and a third end of the second conductive circuit L2 is electrically connected to the second negative terminal P2- of the second connector 222b.

[0143] The mainboard 13 includes a third conductive circuit L3 and a fourth conductive circuit L4 disposed on the main control circuit board 130. A first end of the third conductive circuit L3 is electrically connected to the first positive terminal P1+ of the first interface 131a, a second end of the third conductive circuit L3 is electrically connected to the positive terminal of the first interface 131b, a third end of the third conductive circuit L3 is electrically connected to the charge-discharge module 134, and a third end of the third conductive circuit L3 is electrically connected to the second end of the charging module 136. A first end of the fourth conductive circuit L4 is electrically connected to the first negative terminal P1- of the second interface 131b, a second end of the fourth conductive circuit L4 is electrically connected to the second negative terminal of the second interface 131b, and a third end of the fourth conductive circuit L4 is electrically connected to the battery protection module 132.

[0144] It can be understood that by setting the ports of the first connector 222a and the first interface 131a to the positive terminals, and the ports of the second connector 222b and the second interface 131b to the negative terminals, the terminal 01 can only be powered on when the first connector 222a and the first interface 131a are engaged, and the second connector 222b and the second interface 131b are engaged. In these embodiments, no additional control circuit is required, which can significantly reduce the number of components and effectively reduce costs.

[0145] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.

Claims

1. A battery assembly, applied to a terminal, the terminal comprising a mainboard and the battery assembly, characterized in that: The main board includes a battery protection module, and the battery assembly includes a battery cell and a battery circuit board assembly; The battery cell comprises: Battery cell body; and A top sealing portion, the top sealing portion is arranged on the top surface of the battery body in a bent shape, and the first pole lug and the second pole lug of the battery are led out from the top sealing portion; The battery circuit board assembly includes: A battery circuit board comprises a main body and an extension portion extending outward from the main body, wherein the extension portion is bent relative to the main body; A tab pad is disposed on the main body, the tab pad is in contact with at least a portion of the top seal, and the tab pad includes at least a first tab pad and a second tab pad, the first tab pad is electrically connected to the first tab, and the second tab pad is electrically connected to the second tab; A first connector, disposed on the extension portion, the first connector being electrically connected to the first tab pad, and the first connector being used to connect to the mainboard; and A second connector is disposed on the extension portion, the second connector is electrically connected to the second tab pad, and the second connector is used to connect to the mainboard; Wherein, the battery protection module is electrically connected to at least one of the first connector and the second connector.

2. The battery assembly according to claim 1, characterized in that The battery cell further includes a third pole tab; the pole tab pad further includes a third pole tab pad, and the third pole tab pad is electrically connected to the third pole tab; The first pole ear and the third pole ear are positive pole ears, and the second pole ear is a negative pole ear; The first connector includes a positive terminal and a negative terminal, and the second connector includes a positive terminal and a negative terminal; The battery circuit board assembly includes a first conductive circuit, a second conductive circuit and a third conductive circuit arranged on the battery circuit board; The first end of the first conductive circuit is electrically connected to the first tab pad, and the second end of the first conductive circuit is electrically connected to the positive terminal of the first connector; The first end of the second conductive circuit is electrically connected to the third tab pad, and the second end of the second conductive circuit is electrically connected to the positive terminal of the second connector; The first end of the third conductive circuit is electrically connected to the second tab pad, the second end of the third conductive circuit is electrically connected to the negative terminal of the first connector, and the third end of the third conductive circuit is electrically connected to the negative terminal of the second connector.

3. The battery assembly according to claim 2, characterized in that: The battery circuit board assembly further includes a battery protection unit, the height of the battery protection unit being lower than the welding height of the first tab pad, the welding height of the second tab pad, and the welding height of the third tab pad; The battery protection unit is arranged at the connection between the first end of the third conductive circuit and the second tab pad.

4. The battery assembly according to claim 3, characterized in that: The battery protection unit is a current fuse.

5. The battery assembly according to claim 3, characterized in that: The battery protection unit is a protection switch tube, a first end of which is electrically connected to a first end of the third conductive circuit, and a second end of which is electrically connected to the second tab pad. In response to a short circuit in the battery assembly, the protection switch tube is turned off.

6. The battery assembly according to any one of claims 2 to 5, characterized in that: The third conductive circuit includes a metal layer and a flame retardant layer. The flame retardant layer is arranged on the surface of the battery circuit board, and the metal layer is arranged on the surface of the flame retardant layer.

7. The battery assembly according to any one of claims 2 to 6, characterized in that: The battery circuit board assembly includes a fourth conductive circuit disposed on the battery circuit board, a first end of the fourth conductive circuit is electrically connected to the first conductive circuit, and a second end of the fourth conductive circuit is electrically connected to the second conductive circuit.

8. The battery assembly according to claim 1, wherein: The battery cell further includes a third pole tab; the pole tab pad further includes a third pole tab pad, and the third pole tab pad is electrically connected to the third pole tab; The first connector includes a first positive terminal and a second positive terminal, and the second connector includes a first negative terminal and a second negative terminal; The first pole ear and the third pole ear are positive pole ears, and the second pole ear is a negative pole ear; The battery circuit board assembly includes a first conductive circuit and a second conductive circuit disposed on the battery circuit board; The first end of the first conductive circuit is electrically connected to the first electrode tab, the second end of the first conductive circuit is electrically connected to the third electrode tab, the third end of the first conductive circuit is electrically connected to the first positive terminal of the first connector, and the fourth end of the first conductive circuit is electrically connected to the second positive terminal of the first connector; The first end of the second conductive circuit is electrically connected to the second electrode tab, the second end of the second conductive circuit is electrically connected to the first negative terminal of the second connector, and the third end of the second conductive circuit is electrically connected to the second negative terminal of the second connector.

9. A terminal, characterized in that: include: Motherboard; as well as The battery assembly according to any one of claims 1 to 7; Wherein, the mainboard includes a battery protection module, and the battery protection module is electrically connected to at least one of the first connector and the second connector.

10. The terminal according to claim 9, characterized in that The mainboard also includes: A main control circuit board, wherein the battery protection module is arranged on the main control circuit board; A load module is arranged on the main control circuit board; A charge and discharge module is arranged on the main control circuit board, the charge and discharge module is electrically connected to the load module, the charge and discharge module is used to connect to a power supply, and the charge and discharge module is used to control the charging and discharging of the battery assembly; A current detection element, wherein a first end of the current detection element is electrically connected to a first end of the battery protection module, and a second end of the current detection element is connected to the ground; A first interface, provided on the main control circuit board, the first interface being used to cooperate with the first connector; and The second interface is arranged on the main control circuit board, and the second interface is used to cooperate with the second connector.

11. The terminal according to claim 10, characterized in that The first end of the current sensing element is also connected to the charging and discharging module.

12. The terminal according to claim 10 or 11, characterized in that: The first interface includes a positive terminal and a negative terminal, and the second interface includes a positive terminal and a negative terminal; The second end of the battery protection module is electrically connected to the negative end of the first interface and the negative end of the second interface respectively.

13. The terminal according to any one of claims 10 to 12, characterized in that: The main control circuit board includes a first circuit board, a second circuit board and a frame board; The first circuit board includes a first surface and a second surface arranged in back-to-back relation, the first surface being a side away from the second circuit board, the second circuit board includes a third surface and a fourth surface, the fourth surface being a side away from the first circuit board; The frame plate is arranged between the first circuit board and the second circuit board so that the second surface and the third surface are spaced apart. Place; The components of the battery protection module are disposed on one or more of the first surface, the second surface, the third surface or the fourth surface.

14. The terminal according to any one of claims 10 to 12, characterized in that: The battery protection module is integrated into the charging and discharging module.

15. The terminal according to any one of claims 10 to 14, characterized in that: The main board further comprises a charging module, which is arranged on the main control circuit board and is used to control the charging of the battery assembly; The first end of the charging module is electrically connected to the positive end of the second interface, and the second end of the charging module is electrically connected to the port of the charging and discharging module connected to the power supply.

16. The terminal according to claim 15, characterized in that The battery cell comprises a first battery cell passage and a second battery cell passage; When the battery cell is discharged, the charge and discharge module supplies power to the load module through the first connector and the first interface; When the battery cell is charged, the charging and discharging module charges the first battery cell path through the first connector and the first interface, and the charging module charges the second battery cell path through the second connector and the second interface.

17. The terminal according to claim 15, characterized in that: The mainboard includes a switch unit, a first end of the switch unit is electrically connected to the positive end of the first interface, and a second end of the switch unit is electrically connected to the positive end of the second interface; In response to the first connector being electrically connected to the first interface, the charge-discharge module supplies power to the load module through the first connector; In response to the second connector being not electrically connected to the second interface, the switch unit is turned off; In response to the first connector being electrically connected to the first interface and the second connector being electrically connected to the second interface, the load module controls the switch unit to be turned on.

18. The terminal according to claim 17, characterized in that: The switch unit includes a switch tube, or the switch unit is a chip.

19. The terminal according to claim 17 or 18, characterized in that: The battery circuit board assembly includes a detection module, the second connector includes a detection end, the detection module is electrically connected to the detection end of the second connector, and the detection module is used to monitor the battery cell and generate detection information; The second interface includes a detection end, and the load module is electrically connected to the detection end of the second interface; Wherein, when the second connector is plugged into the second interface, the detection end of the second connector is electrically connected to the detection end of the second interface; In response to the load module not receiving the detection information, it is determined that the second connector is not electrically connected to the second interface.

20. The terminal according to claim 19, characterized in that The detection module is a negative temperature coefficient thermistor (NTC), and the detection information is the temperature of the battery cell.

21. The terminal according to claim 19, characterized in that The detection module is an encryption chip, and the detection information is the product serial number of the battery cell.

22. The terminal according to any one of claims 17 to 21, characterized in that: The switch unit is integrated in the charging module.

23. The terminal according to claim 17 or 18, characterized in that: The main board includes an AND logic module, a first input end of the AND logic module is electrically connected to the positive end of the first interface, a second input end of the AND logic module is electrically connected to the positive end of the second interface, and an output end of the AND logic module is electrically connected to the control end of the switch unit, wherein when the first interface is electrically connected to the first connector, the first input end is a high-level signal, and when the second interface is electrically connected to the second connector, the second input end is a high-level signal; in response to the output of the AND logic module being a high-level signal, the switch unit is turned on, and in response to the output of the logic module being a low-level signal, the switch unit is disconnected.

24. A terminal, characterized in that: comprising a main board and a battery assembly as claimed in claim 8; The main board comprises: Main control circuit board; A battery protection module, arranged on the main control circuit board; A load module is arranged on the main control circuit board; A charge and discharge module is arranged on the main control circuit board, the charge and discharge module is electrically connected to the load module, the charge and discharge module is used to connect to a power supply, and the charge and discharge module is used to control the charging and discharging of the battery assembly; A charging module is arranged on the main control circuit board, and a first end of the charging module is connected to an end of the charging and discharging module connected to the power supply; A first interface, provided on the main control circuit board, the first interface being used to cooperate with the first connector, the first interface comprising a first positive terminal and a second positive terminal; and A second interface, provided on the main control circuit board, the second interface is used to cooperate with the second connector, and the second interface includes a first negative terminal and a second negative terminal; a third conductive circuit, wherein a first end of the third conductive circuit is electrically connected to the first positive terminal of the first interface, a second end of the third conductive circuit is electrically connected to the positive terminal of the first interface, a third end of the third conductive circuit is electrically connected to the charge and discharge module, and a third end of the third conductive circuit is electrically connected to the second end of the charging module; A fourth conductive circuit, wherein a first end of the fourth conductive circuit is electrically connected to the first negative terminal of the second interface, a second end of the fourth conductive circuit is electrically connected to the second negative terminal of the second interface, and a third end of the fourth conductive circuit is electrically connected to the battery protection module.

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