Battery assembly and terminal

Abstract

The utility model provides a battery assembly and a terminal. The terminal comprises a mainboard and a battery assembly. The mainboard comprises a battery protection module, and the battery assembly comprises a battery cell and a battery circuit board assembly. The battery cell comprises a battery cell body and a top sealing part, the top sealing part is arranged on the top surface of the battery cell body in a bent shape, and a first tab and a second tab of the battery cell are led out from the top sealing part. The battery circuit board assembly includes a battery circuit board, a tab pad, a first connector, and a second connector. The battery circuit board comprises a main body part and an extension part which is bent relative to the main body part. The tab bonding pad is arranged on the main body part and is attached to at least part of the top sealing part; the first tab pad is electrically connected with the first tab, and the second tab pad is electrically connected with the second tab. The first connector is electrically connected with the first tab bonding pad and used for being connected with a mainboard. And the second connector is electrically connected with the second tab pad and is used for connecting a mainboard. Wherein the battery protection module is electrically connected with at least one of the first connector and the second connector.

Description

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 gradually increasing. Considering the portability of users, the screen of mobile phone terminals is generally less than 7 inches. When the size of the mobile phone terminal is certain, the space occupied by various functional modules such as internal cameras, SOCs, and charging chips is getting larger and larger. At present, the battery capacity is usually increased by increasing the volume of battery cells, thereby improving the battery life of mobile phone terminals. However, while increasing the volume of battery cells, the configuration of each functional module of the mobile phone terminal must also be taken into account. Therefore, how to increase the battery capacity and thus improve the 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. Utility Model Content

[0003] In view of the above problems, the present application provides a battery assembly and a 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.

[0004] In a first aspect, the present application provides a battery assembly, which is applied to 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 battery cell body and a top seal. The top seal is arranged on the top surface of the battery cell body in a bent shape, and the first pole tab and the second pole tab of the battery cell are led out from the top seal. The battery circuit board assembly includes a battery circuit board, a pole tab pad, a first connector and a second connector. The battery circuit board includes a main body, an extension extending outward from the main body, and the extension is bent relative to the main body. The pole tab pad is arranged on the main body, and the pole tab pad is attached to at least part of the top seal. The pole tab pad includes at least a first pole tab pad and a second pole tab pad, and the first pole tab pad is electrically connected to the first pole tab, and the second pole tab pad is electrically connected to the second pole tab. The first connector is arranged on the extension, the first connector is electrically connected to the first pole tab pad, and the first connector is used to connect to the mainboard. The second connector is arranged on the extension, the second connector is electrically connected to the second pole 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.

[0005] It can be understood that the battery assembly provided in the embodiment of the present application sets the battery protection module on the main board to reduce the impact of the battery protection module on the volume of the battery assembly. The top seal portion on the top surface of the battery cell is bent to further compress the space on the top of the battery cell, so as to increase the capacity of the battery cell body and thus increase the battery life of the terminal.

[0006] In combination with the first aspect, in a possible implementation, the battery cell further includes a third pole lug, the pole lug pad further includes a third pole lug pad, and the third pole lug pad is electrically connected to the third pole lug. The first pole lug and the third pole lug are positive pole lugs, and the second pole lug is a negative pole lug. 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 pole lug 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 pole lug 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 pole lug 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.

[0007] In combination with the first aspect, in a possible implementation, 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 disposed at the connection between the first end of the third conductive circuit and the second tab pad. It can be understood that the height of the battery protection unit is lower than the welding height of the tab pad, which can avoid the battery protection unit from occupying space along the length direction of the battery cell body.

[0008] In combination with the first aspect, in a possible implementation manner, the battery protection unit is a current fuse.

[0009] In combination with the first aspect, in a possible implementation, the battery protection unit is a protection switch tube, 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.

[0010] 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 arranged on a surface of the battery circuit board, and the metal layer is arranged on a surface of the flame retardant layer.

[0011] In combination with the first aspect, in a 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.

[0012] In combination with the first aspect, in a possible implementation, the battery cell further includes a third pole lug, the pole lug pad further includes a third pole lug pad, and the third pole lug pad is electrically connected to the third pole lug. 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 lug and the third pole lug are positive pole lugs, and the second pole lug is a negative pole lug. The battery circuit board assembly includes a first conductive circuit and a second conductive circuit arranged on the battery circuit board. The first end of the first conductive circuit is electrically connected to the first pole lug, the second end of the first conductive circuit is electrically connected to the third pole lug, 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 pole lug, 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 turned on only when the first connector and the first interface are fastened together, and the second connector and the second interface are fastened together. In this way, no additional control circuit is needed, the number of components can be greatly reduced, and the cost can be effectively reduced.

[0013] In a second aspect, an embodiment of the present application provides a terminal, which includes a mainboard and a battery assembly. The battery assembly includes a battery cell and a battery circuit board assembly. The battery cell includes a battery cell body and a top seal. The top seal is arranged on the top surface of the battery cell body in a bent shape, and the first and second pole tabs of the battery cell are led out from the top seal. The battery circuit board assembly includes a battery circuit board, a pole tab pad, a first connector and a second connector. The battery circuit board includes a main body, an extension extending outward from the main body, and the extension is bent relative to the main body. The pole tab pad is arranged on the main body, and the pole tab pad is attached to at least part of the top seal. The pole tab pad includes at least a first pole tab pad and a second pole tab pad, and the first pole tab pad is electrically connected to the first pole tab, and the second pole tab pad is electrically connected to the second pole tab. The first connector is arranged on the extension, the first connector is electrically connected to the first pole tab pad, and the first connector is used to connect to the mainboard. The second connector is arranged on the extension, the second connector is electrically connected to the second pole tab pad, and the second connector is used to connect to the mainboard. Among them, the battery protection module is electrically connected to at least one of the first connector and the second connector. 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.

[0014] In combination with the second aspect, in a possible implementation, the mainboard also 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 arranged 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 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 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 the ground. The first interface is used to cooperate with the first connector, and the second interface is used to cooperate with the second connector.

[0015] In combination with the second aspect, in a possible implementation manner, the first end of the current sensing element is further connected to the charging and discharging module.

[0016] In conjunction with the second aspect, in a 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.

[0017] In combination with the second aspect, in a 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 arranged back to back, and the first surface is a side away from the second circuit board. The second circuit board includes a third surface and a fourth surface, and the fourth surface is a side away from the first circuit board. The frame board is arranged between the first circuit board and the second circuit board, so that the second surface and the third surface are arranged at intervals. The components of the battery protection module are arranged on one or more of the first surface, the second surface, the third surface or the fourth surface.

[0018] In combination with the second aspect, in a possible implementation, the battery protection module is integrated into the charging and discharging module.

[0019] In conjunction with the second aspect, in a possible implementation, the mainboard further includes a charging module, which is disposed on the main control circuit board. The charging module is used to control the charging of the battery assembly. A first end of the charging module is electrically connected to the positive end of the second interface, and a second end of the charging module is electrically connected to a port of the charging and discharging module connected to a power supply.

[0020] In combination with the second aspect, in a possible implementation, the battery cell includes a first battery cell path and a second battery cell path. 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 charge and discharge 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.

[0021] In combination with the second aspect, in a possible implementation, 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 and discharge module supplies power to the load module through 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.

[0022] In combination with the second aspect, in a possible implementation manner, the switch unit includes a switch tube, or the switch unit is a chip.

[0023] In combination with the second aspect, in a 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.

[0024] 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.

[0025] In conjunction with the second aspect, in a possible implementation, the detection module is an encryption chip, and the detection information is a product serial number of the battery cell.

[0026] In combination with the second aspect, in a possible implementation manner, the switch unit is integrated into the charging module.

[0027] In combination with the second aspect, in a possible implementation, the mainboard includes a logic module, 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.

[0028] In a third aspect, an embodiment of the present application provides a terminal. The terminal includes a main board and a battery assembly. 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 includes a battery cell body and a top seal. The top seal is arranged on the top surface of the battery cell body in a bent shape, and the first pole tab and the second pole tab of the battery cell are led out from the top seal. The battery circuit board assembly includes a battery circuit board, a pole tab pad, a first connector and a second connector. The battery circuit board includes a main body, an extension extending outward from the main body, and the extension is bent relative to the main body. The pole tab pad is arranged on the main body, and the pole tab pad is attached to at least part of the top seal. The pole tab pad includes at least a first pole tab pad and a second pole tab pad, and the first pole tab pad is electrically connected to the first pole tab, and the second pole tab pad is electrically connected to the second pole tab. The first connector is arranged on the extension, the first connector is electrically connected to the first pole tab pad, and the first connector is used to connect to the main board. The second connector is arranged on the extension, the second connector is electrically connected to the second pole tab pad, and the second connector is used to connect to the main board. The battery protection module is electrically connected to at least one of the first connector and the second connector. The battery cell further includes a third pole ear, the pole ear pad further includes a third pole ear pad, and the third pole ear pad is electrically connected to the third pole ear. 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 arranged on the battery circuit board. The first end of the first conductive circuit is electrically connected to the first pole ear, the second end of the first conductive circuit is electrically connected to the third pole ear, 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 pole ear, 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, and a load module, a charge and discharge module, a charging module, a current detection element, a first interface, a second interface and a third conductive circuit arranged 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 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 an 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 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.

[0029] In addition, the technical effects brought about by any possible implementation method in the second aspect to the third aspect 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

[0030] Figure 1 A schematic diagram of a terminal provided in an embodiment of the present application.

[0031] Figure 2 for Figure 1 Schematic diagram of the battery cell.

[0032] Figure 3 A schematic diagram of the connection between a battery assembly and a mainboard.

[0033] Figure 4 A schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0034] Figure 5 for Figure 4 Schematic diagram of the battery circuit board assembly.

[0035] Figure 6 for Figure 4 Schematic diagram of the battery components.

[0036] Figure 7 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0037] Figure 8 for Figure 5 Schematic diagram of the third conductor line.

[0038] Fig. 9 for Figure 5 Another schematic diagram of the third conductor line in FIG.

[0039] Fig.10 for Figure 4 Schematic diagram of the battery connector and interface.

[0040] Fig.11 for Figure 4 Schematic diagram of the motherboard.

[0041] Fig.12 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0042] Fig.13 for Fig.12 Schematic diagram of the battery circuit board.

[0043] Fig.14 for Fig.12 Schematic diagram of the charging and discharging module.

[0044] Fig.15 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0045] Fig.16 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0046] Fig.17 for Fig.16 Schematic diagram of the switch unit.

[0047] Fig.18 for Fig.16 Another schematic diagram of the switch unit in FIG.

[0048] Fig.19 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0049] Fig. 20 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0050] Fig.21 A schematic diagram of a logic module provided in an embodiment of the present application.

[0051] Fig. 22 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application.

[0052] Fig.23 Another schematic diagram of the connection between the battery assembly and the mainboard provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] 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.

[0054] It is understandable that the connection relationship described in this application refers to direct or indirect connection. 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 through one or more other electrical components. For example, A and C can be directly connected, and C and B can be directly connected, so that A and B are connected through C. It is also understandable that the "A connects B" described in this application can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0055] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. In this article, "and / or" is only a way to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0056] In the description of this application, words such as "first" and "second" are only used to distinguish different objects, and do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit differences. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0057] The technical solution of the present application is further described in detail below in conjunction with the accompanying drawings.

[0058] The embodiment of the present application outputs a terminal. The terminal includes a mobile phone, a tablet computer (pad), a television, a smart wearable product (for example, a smart watch, a smart bracelet), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and other electronic products with a rechargeable battery. The above 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 terminal. For the convenience of explanation below, the terminal is taken as follows Figure 1 The description is given using the mobile phone shown as an example.

[0059] like Figure 1 As shown, the terminal 01 may mainly include a display screen 10, a middle frame 11, and a rear shell 12. The display screen 10 is arranged on a side of the middle frame 11 away from the rear shell 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.

[0060] In addition, if Figure 1As shown, the terminal 01 may further include a mainboard 13, a battery assembly 20 and components 14. The mainboard 13 and the battery assembly 20 are arranged on the surface of the middle frame 11 on one side close to the rear shell 12. The components 14 are arranged on the surface of the mainboard 13 on one side close to the rear shell 12. For example, the mainboard 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 buckled on the middle frame 11, a receiving cavity for accommodating the mainboard 13, the components 14 and the battery assembly 20 may be formed between the rear shell 12 and the middle frame 11. In this way, the probability of external water vapor, oxygen, dust, etc. entering the receiving cavity can be reduced to protect the components located in the receiving cavity.

[0061] like Figure 1 As shown, the battery assembly 20 may include a battery cell 21 and a battery circuit board assembly 22. The battery cell 21 is used to supply power to the electronic components in the terminal 01. For example, the battery cell 21 may be a soft-pack battery cell. In this case, Figure 2 As shown, the battery cell 21 may include a battery cell body 210, a tab 211 disposed on the battery cell body 210, and a packaging film 212 wrapping the battery cell body 210. It can be understood that the tab 211 includes at least one positive tab and at least one negative tab.

[0062] In some embodiments of the present application, the packaging film 212 may be an aluminum-plastic film. The packaging film 212 may be sealed on the top surface A and the side surface B of the battery cell body 210. The packaging film 212 may be sealed on the top surface A of the battery cell body 210 to form a top seal 2121. The tab 211 may be led out of the packaging film 212 by the top seal 2121.

[0063] It should be noted that the top surface A of the battery cell body 210 in the embodiment of the present application refers to the surface of the battery cell body 210 from which the pole ear 211 is led out. 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 enough component space for the battery assembly 20 in the terminal 01, the more pole ears 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 pole ears. For the convenience of explanation below, the embodiment is described by taking the battery cell 21 including two positive pole ears and one negative pole ear as an example. By way of example, Figure 2 The first pole tab 211 a shown is a positive pole tab, the second pole tab 211 b is a negative pole tab, and the third pole tab 211 c is a positive pole tab.

[0064] See also Figure 3 , which is 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.

[0065] The battery cell 21a includes: a battery cell body 210, a top seal 2121, and a tab 211 extending from the top seal 2121. The top seal 2121 is disposed on the top surface A of the battery cell body 210, and the top seal 2121 is disposed perpendicularly or substantially perpendicularly to the top surface A. The tab 211 is bent along the Y axis toward the battery cell body 210 after being extended from the top seal 2121. A buffer pad 30 is also disposed between the bent portion of the tab 211 and the top seal 2121. It can be understood that the Y axis direction is Figure 3 The Z-axis direction is along the length direction of the battery cell body 210 , and the Z-axis direction is perpendicular to the battery cell body 210 .

[0066] 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 arranged between the first battery circuit board 220_1 and the second battery circuit board 220_2. The tab pad 221 is arranged on the surface of the second battery circuit board 220_2 away from the battery protection module 223, and the tab pad 221 is arranged in affixed with the bent tab 211. The connector 222 is arranged on the surface of the first battery circuit board 220_1 close to the battery protection module 223. The connector 222 is used to be electrically connected to the mainboard 13. Exemplarily, an interface 131 is provided on the mainboard 13, and the interface 131 is configured to be plugged with the connector 222, so that the battery circuit board assembly 22a is electrically connected to the mainboard 13.

[0067] like Figure 3 As shown, the distance between the top surface A of the battery body 210 and the main board 13 along the Y-axis direction is the first distance H1. Since 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 direction. As a result, the space between the battery body 210 and the main board 13, that is, the head space of the battery 20a, is mostly occupied by the battery protection module 223, which reduces the potential space of the battery body 210, thereby affecting the battery life of the terminal 01.

[0068] In view of the above problems, an embodiment of the present application provides a terminal, which 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.

[0069] The terminal provided in the present application 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 battery cell body and a top seal. The top seal is arranged on the top surface of the battery cell body in a bent shape, and the first and second pole tabs of the battery cell are led out from the top seal. The battery circuit board assembly includes a battery circuit board, a pole tab pad, a first connector and a second connector. The battery circuit board includes a main body, an extension extending outward from the main body, and the extension is bent relative to the main body. The pole tab pad is arranged on the main body, and the pole tab pad is attached to at least part of the top seal. The pole tab pad includes at least a first pole tab pad and a second pole tab pad, and the first pole tab pad is electrically connected to the first pole tab, and the second pole tab pad is electrically connected to the second pole tab. The first connector is arranged on the extension, the first connector is electrically connected to the first pole tab pad, and the first connector is used to connect to the mainboard. The second connector is arranged on the extension, the second connector is electrically connected to the second pole tab pad, and the second connector is used to connect to the mainboard. Among them, the battery protection module is electrically connected to at least one of the first connector and the second connector.

[0070] An embodiment of the present application also provides a battery assembly, which is applied to the above-mentioned terminal.

[0071] The battery assembly and terminal provided in the embodiment of the present application place the battery protection module on the main board to reduce the impact of the battery protection module on the volume of the battery assembly. The top seal portion on the top surface of the battery cell is bent to further compress the space on the top of the battery cell, so as to increase the capacity of the battery cell body and thus increase the battery life of the terminal.

[0072] See also Figure 4 , Figure 5 and Figure 6 The battery assembly 20 includes a battery cell 21 and Figure 5 The battery circuit board assembly 22 is shown.

[0073] The battery cell 20 includes a battery cell body 210 and a top seal 2121. The top seal 2121 is bent and arranged on the top surface A of the battery cell body 210. For example, the top seal 2121 extends in 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 arranged between the bent top seal 2121 and the top surface A. The tab 211 of the battery cell 20 can be Figure 6 The first pole ear 211a and the second pole ear 221b are shown, and the pole ear 211 is led out from the top seal portion 2121. It can be understood that the Y-axis direction is Figure 4 The Z-axis direction is along the length direction of the cell body 210, and the Z-axis direction is perpendicular to the cell body 210. The tab 211 is led out from the top seal portion 2121 and then bent downward along the Z-axis direction.

[0074] 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 may be a flexible printed circuit (FPC) or a hard board, and the connector 222 may include, for example, a first connector 222a and a second connector 222b. The battery circuit board 22 includes a main body 2201 and an extension portion 2202 extending outward from the main body 2201. It can be understood that in order to increase the size of the battery cell 21 within the limited component space of the terminal 01 to increase the capacity of the battery cell 21, the extension portion 2202 is bent relative to the main body 2201. For example, the extension portion 220 in the battery circuit board 220 may be along Figure 5 The dashed line shown is bent relative to the main body 2201. Figure 5 As shown, the main body 2201 in the battery circuit board 220 can be bent to be parallel or approximately parallel to the top surface A of the battery cell body 210. In this way, the positive tab pad 221a and the negative tab pad 221b provided on the main body 2201 can face the top surface A of the battery cell body 210. At this time, the extension part 2202 in the battery circuit board 220 can be aligned with the board surface ( Figure 5 The XOY plane shown in FIG. Figure 5 In this case, the main body 2201 and the extension 220 in the battery circuit board 220 can be perpendicular or approximately perpendicular. In a possible implementation, as Figure 4 As shown, the extension portion 2202 is bent approximately 90° relative to the main body portion 2201 .

[0075] The tab pad 221 is disposed on the surface of the main body 2201, and the tab pad 221 is in contact with at least a portion of the top seal 2121. Figure 5 and Figure 6 As shown, the tab pad 221 at least includes 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.

[0076] The first connector 222a is disposed on the extension portion 2202, and the first connector 222a is electrically connected to the first tab pad 221a, and the first connector 222a is used to connect to the mainboard 13. The second connector 222b is disposed on the extension portion 2202, and the second connector 2202 is electrically connected to the second tab pad 221b, and the second connector 221b is used to connect to the mainboard 13. The battery protection module 131 is electrically connected to at least one of the first connector 222a and the second connector 222b. Figure 4As shown, exemplarily, the mainboard 13 includes an interface 131, and the interface 131 is configured to be electrically connected to a connector 222, such as a first connector 222a or a second connector 222b. The mainboard 13 includes a conductive line ( Figure 4 The battery protection module 132 is electrically connected to the interface 131 through a conductive line. 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 222a or the second connector 222b) through the interface 131.

[0077] like Figure 4 As shown, 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 body 210 are sequentially arranged. The distance between the top surface A of the battery body 210 and the main board 13 along the Y-axis direction is defined as the second distance H2. Figure 3 In the battery assembly 20a shown, the second distance H2 is smaller than the first distance H1 because the battery protection module 132 is disposed on the main board 13. In this way, the space between the battery body 210 and the main board 13, that is, the head space of the battery 20a, is smaller, and the saved space can be used to increase the capacity of the battery body 210, thereby increasing the battery life of the terminal 01.

[0078] like Figure 5 and Figure 6 As shown, in one embodiment, the battery cell 21 includes a first pole tab 211a, a second pole tab 211b and a third pole tab 211c. The pole tab pad 221 includes a first pole tab pad 221a, a second pole tab pad 221b and a third pole tab pad 221c.

[0079] The first pole tab pad 221a is configured to be welded to the first pole tab 211a so that the two are electrically connected. The second pole tab pad 221b is configured to be electrically connected to the second pole tab 211b. The third pole tab pad 221c is configured to be electrically connected to the third pole tab 211c.

[0080] like Figure 5As shown, the battery circuit board 220 may include a main body 2201 and an extension 2202 extending outward from the main body 2201. The tab pads 221, for example, the first tab pad 221a, the second tab pad 221b and the third tab pad 221c, are disposed on the main body 2201. In addition, the tab pads 221 are configured to be welded with the tabs 211, for example, the first tab 211a, the second tab 211b and the third tab 211c, so that the cell body 210 can be electrically connected to the battery circuit board 220. From the above, it can be seen that the battery cell 21 may include two positive pole ears (i.e., the first pole ear 211a and the second pole ear 211c) and one negative pole ear (i.e., the second pole ear 211b), so the circuit board protection component 22 may include two positive pole ear pads (i.e., the first pole ear pad 221a and the third pole ear pad 221c) and one negative pole ear pad (i.e., the second pole ear pad 221b).

[0081] In addition, a connector 222 is provided on the extension portion 2202 of the PFC 220. The connector 222 can be inserted into the interface 131 on the main board 13, so that the battery circuit board 220 can be electrically connected to the main board 13. It should be noted that the present application does not limit the number of the connectors 222. When there is enough component space for the battery assembly 20 in the terminal 01, the more the number of connectors 222, the more conducive it is to reduce the impedance generated by the battery assembly 20 during the charging and discharging process.

[0082] The battery circuit board assembly 22 provided in the 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.

[0083] Alternatively, for example, the battery circuit board assembly 22 may include two connectors, respectively: Figure 4 In some embodiments of the present application, the battery circuit board 220 may include a first connector 222a and a second connector 222b. Figure 6The two extensions shown are the first extension 2202a and the second extension 2202b. At this time, the first connector 222a can be arranged on the first extension 2202a, and the second connector 222b can be arranged on the second extension 2202b. Each connector 222 includes a positive terminal and a negative terminal. Exemplarily, 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 circuit L1, a second conductive circuit L2 and a third conductive circuit L3 arranged on the battery circuit board 220. Among them, the first end of the first conductive circuit L1 is electrically connected to the first pole ear pad 221a, and the second end of the first conductive circuit L1 is electrically connected to the positive terminal P+ of the first connector 222a. The first end of the second conductive circuit L2 is electrically connected to the third pole ear pad 221c, and the second end of the second conductive circuit L2 is electrically connected to the positive terminal P+ of the second connector 222b. The first end of the third conductive circuit L3 is electrically connected to the second tab pad 221b, the second end of the third conductive circuit L3 is electrically connected to the negative terminal P- of the first connector 222a, and the third end of the third conductive circuit L3 is electrically connected to the negative terminal P- of the second connector 222b.

[0084] 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 mainboard 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 mainboard 13, thereby forming an electrical signal loop.

[0085] like Figure 6 As shown, the first pole tab pad 221a (positive pole tab pad) is welded to the first pole tab 211a (positive pole tab). Similarly, the second pole tab pad 221b (negative pole tab pad) is welded to the second pole tab 211b (negative pole tab), and the third pole tab pad 221b (positive pole tab pad) is welded to the third pole tab 211c (positive pole tab).

[0086] like Figure 5 As shown, 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 line L3 and the second tab pad 221b.

[0087] In this embodiment, the battery protection unit 224 is a minimum primary protection module circuit. By providing the battery protection unit 224 , it is possible to prevent the connector 222 from short-circuiting during the transportation and assembly of the battery cell 21 .

[0088] Usually, the components in the battery protection unit 224 are relatively low, for example, the height is within 0.4 mm, and does not exceed the height of the tab pads 221 after welding, that is, it does not exceed 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 Figure 4 The size of the second distance H2.

[0089] In a possible implementation, the battery protection unit 224 is a current fuse. Once the connector 222 is short-circuited, for example, 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 to cut off the current path, thereby preventing the battery circuit board assembly 22 from burning out.

[0090] In one possible implementation, the battery protection unit 224 is a protection switch tube, a first end of the protection switch tube is electrically connected to the first end of the third conductive line L3, and a second end of the protection switch tube is electrically connected to the second pole ear pad 221b. In response to a short circuit in the battery assembly 20, the protection switch tube is turned off. Exemplarily, in this implementation, the mainboard 13 should also include a driving unit of the protection switch tube connected to the third end of the protection switch tube, and a control unit connected to the driving unit of the protection switch tube, and the control unit can detect whether a short circuit occurs 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 driving unit to drive the protection switch tube to turn off. In response to the battery assembly 20 restoring the path, the control unit outputs a second drive signal to the driving unit to drive the protection switch tube to turn on. As Figure 7 As shown, exemplarily, the control unit and the driving unit can be integrated into the battery protection module 132 on the main board 13.

[0091] In a 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.

[0092] Please also read Figure 8 In a 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 material of the flame retardant layer L3_2 is polyimide (PI), and the material of the metal layer L3_1 is copper.

[0093] Please also read Fig. 9 , the width A1 of the low impedance region S1 is smaller than the width A2 of the high impedance region S2.

[0094] By controlling the width of the third conductive line L3 and controlling the impedance within a certain range, a function similar to that of a current fuse can be achieved. The maximum charging current and the maximum discharging current can pass normally, but if the connector 222 is short-circuited, this section of the line L3 will heat up and burn the flame retardant layer L3_2, cutting off the current and preventing the battery cell 21 from overheating and burning.

[0095] 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.

[0096] Please also read Fig.10 , Fig.10 A connector 80 and an interface 90 are shown. The connector 80 can be applied to the above-mentioned connector 222, such as one or more of the first connector 222a or the second connector 222a, and the interface 90 can be applied to the above-mentioned interface 131, such as one or more of the first interface 131a and the second interface 132a. The connector 80 includes a first shell 81 and a first power terminal 82. The first shell 81 includes a first side wall 811 and a plurality of first abutting portions 812 extending from the first side wall 811 in a first direction (such as the positive semi-axis direction of the X-axis in the figure). The first power terminal 82 is formed between two adjacent first abutting portions 812, and two first power terminals 82 facing each other are arranged 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 portion 812. Among them, the first shell 81 is a plastic insulator, and the first power terminal 82 is made of conductive material.

[0097] The interface 90 includes a second housing 91 and a second power terminal 92. The second power terminal 92 is disposed in the second housing 91 and extends along a second direction (e.g., the negative half-axis direction of the X-axis 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 in, the second power terminal 92 can be inserted into the plug-in gap 821, thereby electrically connecting the connector 80 and the interface 90.

[0098] In a possible implementation, the two first abutting portions 812 located on both sides of the first housing 81 at one end away from the first power terminal 82 may be concave to form a groove 8121. Correspondingly, second abutting portions 911 may 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 cooperate with the groove 8121, so that the connector 80 and the interface 90 can be plugged in more stably.

[0099] 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 be conducted only when the connector 80 and the interface 90 are plugged in.

[0100] It can be understood that any one or several of the above-mentioned 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 conflicting with each other.

[0101] Please also read Fig.11 and Fig.12 , Fig.11 for Figure 4 A schematic diagram of the middle main board 13. Fig.12 for Figure 4 Schematic diagram of the connection between the middle main board 13 and the battery assembly 20.

[0102] The main board 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 .

[0103] The first interface 131a is used to cooperate with the first connector 222a, and the second interface 131b is used to cooperate 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-.

[0104] 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.

[0105] A first end of the current detection element 135 is electrically connected to a first end of the battery protection module 132 , and a second end of the current detection element 135 is connected to the ground.

[0106] In a 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 terminal and the second terminal of the current sensing element 135 and calculate the current flowing through the current sensing element 135 according to the known resistance value of the current sensing element 135.

[0107] In this case, the battery protection module 132 can compare the current flowing through the current detection element 135 with the preset current threshold value. For example, the preset current threshold value may include an overcurrent threshold value. When the battery protection module 132 calculates that the current flowing through the current detection element 135 exceeds the above-mentioned overcurrent threshold value, the switch tube in the battery protection module 132 can be controlled to be disconnected, so that the first interface 131a and the second interface 131b are disconnected from the ground. At this time, the battery cell body 210 cannot be charged and discharged to achieve the purpose of protecting the battery cell body 210. In addition, the battery protection module 132 can compare the current flowing through the current detection element 135 with the preset current threshold value to avoid the control process of the battery cell 21 being in an overcharge, over-discharge, short-circuit state, etc. as described above, which will not be repeated here.

[0108] In some embodiments, the first end of the current sensing element 135 is also connected (not shown) to the charge and discharge module 134. It is understood that the charge and discharge module 134 generally also includes a current sensing element. In other words, the battery protection module 132 can share a current sensing element 135 with the charge and discharge module 134 to reduce the number of components on the mainboard 130. It is understood that the implementation method of the charge and discharge module 134 using the current sensing element 135 for protection is similar to that of the battery protection module 132, and will not be repeated here.

[0109] Please also read Fig.13In some embodiments, the main control circuit board 130 includes a first circuit board 1301, a second circuit board 1302, and a frame board 1303. The first circuit board 1301 includes a first surface 13011 and a second surface 13012 disposed back to back, and the first surface 13011 is a side away from the second circuit board 1302. The second circuit board 1302 includes a third surface 13021 and a fourth surface 13022, and the fourth surface 13022 is a side away from the first circuit board 1301. The frame board 1303 is disposed between the first circuit board 1301 and the second circuit board 1302, so that the second surface 13012 and the third surface 13021 are spaced apart. The frame board 1303 is, for example, disposed along the edges of the first circuit board 1301 and the second circuit board 1302, and the frame board 1303, the first circuit board 1301, and the second circuit board 1302 together enclose a receiving cavity 1304. The accommodating cavity 1304 may be used to place components, such as the battery protection module 132 .

[0110] 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. Fig.12 As shown, the dotted line portion is a position where the battery protection module 132 can be set. For example, the battery protection module 132 can be set in one or more areas of the first setting area 1321, the second setting area 1322, the third placement area 1323, the fourth placement area 1324, etc.

[0111] It can be understood that in these embodiments, the battery protection module 132 can be composed of discrete devices, so that the devices in the battery protection module 132 can be dispersed on different surfaces of the multi-layer circuit board for flexible arrangement.

[0112] Of course, in some embodiments, the main control circuit board 130 may also be a double-sided board, and the battery protection module 132 may be disposed on one or both sides of the main control circuit board. Alternatively, the main control circuit board 130 may be a circuit board with more layers, but generally limited by the thickness of the terminal 01, the main control circuit board 130 is generally a double-sided or four-sided layout.

[0113] Please also read Fig.14 In some embodiments, the battery protection module 132 is integrated into the charging and discharging module 134, so that the number of components on the mainboard 13 can be further reduced, and the layout space can be reduced. In this case, the volume of the mainboard 13 can be reduced to use more space to increase the capacity of the battery body 210 and improve the endurance of the terminal 01.

[0114] Please also read Fig.15In some embodiments, the main board 13 further includes a charging module 136. The charging module 136 is disposed on the main control circuit board 130, and the charging module 136 is used to control the charging of the battery assembly 20. The first end of the charging module 136 is electrically connected to the positive terminal P+ of the second interface 131, and the second end of the charging module 136 is electrically connected to the port of the charging and discharging module 134 connected to the power supply.

[0115] It can be understood that in a possible implementation, the charging module 136 is a charging chip.

[0116] In the architecture of dual battery connectors (e.g., first connector 222a and second connector 222b) and dual charging modules (e.g., charging and discharging module 134 and charging module 136), the positive terminal P+ and the negative terminal P- of the two connectors are usually connected in parallel. After the first connector 222a is engaged with the first interface 131a, the second interface 131b is already charged. Therefore, the second connector 222b and the second interface 131b are offset greatly during the engagement process, 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 the battery cell 21 to burn out due to the large current.

[0117] Please also read Fig.16 In some embodiments, the mainboard 13 includes a switch unit 137. The first end of the switch unit 137 is electrically connected to the positive terminal P+ of the first interface 131a, and the second end of the switch unit 137 is electrically connected to the positive terminal P+ of the second interface 131b. In response to the first connector 222a being electrically connected to the first interface 131a, the charge and discharge module 134 can supply power to the load module 133 through the line (e.g., VBAT1+) where the first interface 131a is located. In response to the second connector 222b being not electrically connected to the second interface 131b, the switch unit 137 is turned off. In response to the first connector 222a being electrically connected to the first interface 131a, and the second connector 222b being electrically connected to the second interface 131b, the load module 133 controls the switch unit 137 to be turned on.

[0118] Exemplarily, the load module 133 includes a general purpose input and 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 arranged between the positive terminal and the negative terminal. Taking the first connector 222a as an example, the functional terminal F is arranged 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 end 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.

[0119] The load module 133 can detect whether the first interface 131a and the first connector 222a are engaged by being electrically connected to the functional terminal F of the first interface 131a. When the load module 133 detects that the first interface 131a is electrically connected (i.e., engaged) to the first connector 222a, the charge and discharge module 134 can supply power to 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 is not electrically connected (i.e., not engaged) to the first connector 222a, the switch unit 137 is in the off state by default.

[0120] In the case where the first interface 131a and the first connector 222a are already engaged, since the functional end F of the first interface 131a and the functional end F of the first connector 222a are electrically connected, the load module 133 is electrically connected to the second connector 222b. Further, 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 be turned on. For example, the load module 133 outputs a drive signal to the switch unit 137 to turn on the switch unit 137.

[0121] In a possible implementation, the battery circuit board assembly 22 includes a fourth conductive circuit L0 disposed on the battery circuit board, a first end of the fourth conductive circuit L0 is electrically connected to the first conductive circuit L1, and a second end of the fourth conductive circuit is electrically connected to the second conductive circuit L1. It can be understood that by providing the fourth conductive circuit L0, the left and right paths (i.e., the path where the first conductive circuit L1 is located and the second conductive circuit L1) can be used to balance the current.

[0122] Please also read Fig.17 In some embodiments, the switch unit 137 includes a switch tube.

[0123] 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 a switch tube Q21 and a switch tube Q22.

[0124] 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 end (see Fig.16 ) and receives the output voltage Vout, and connects the gate of the switch tube Q1, and 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+, and 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+.

[0125] Among them, the resistor R2 is a pull-down resistor, and the GPIO end of the default load module 133 outputs a low-level signal, that is, Vout is low. In this way, the gate of the switch tube Q1 (N-type MOS tube) is pulled down, and the switch tube Q1 is turned off. In the shutdown state of terminal 01, 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 terminal 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, there will be no short circuit and sparking. Wait until the second connector 222b and the second interface 131b are correctly fastened. When the terminal 01 is turned on, the GPIO terminal of the load module 133 outputs a high level signal, that is, Vout is high, the switch tube Q1 is turned on, and then the Vcon voltage is pulled down, and the switch tube Q2 is turned on. In this way, the battery cell 21 can be discharged through the second connector 222b and the second interface 131b.

[0126] Please also read Fig.18 In some embodiments, the switch unit 137 includes a chip U1.

[0127] The chip U1 at least includes 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 Fig.16 ) and receives the output voltage Vout. The other end of the resistor R4 is connected to the ground, and the GND end is connected to the ground.

[0128] Among them, the chip U1 is turned on when the CTRL terminal is at a high level, that is, the IN terminal is electrically connected to the OUT terminal, and is turned off when the CTRL terminal is at a low level, that is, the IN terminal is electrically disconnected from the OUT terminal. By default, the chip U1 is turned off. In this case, the second interface 131b is not powered, and the second connector 222b and the second interface 131b will not cause a short circuit or spark.

[0129] Please also read Fig.19In 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.

[0130] 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, Fig.17 The gate current of the switch tube Q1 in Fig.18 131b. The CTRL end in the load module 133 is electrically connected. The IO end is electrically connected to the second interface 131b. The detection end F of the second connector 222b is electrically connected to the detection module 138. When the second interface 131b is plugged with the second connector 222b, the detection end F of the second interface 131b is electrically connected to the detection end F of the second connector 222b. In this way, the IO end of the load module 133 is electrically connected to the detection module 138 to obtain the detection information. If the load module 133 receives the detection information, it indicates that the detection end F of the second connector 222b is electrically connected to the detection end F of the second interface 131b, that is, the second connector 222b is fastened 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 fastened with the second interface 131b.

[0131] It is understandable that, depending on the detection module 138 , the detection information may vary accordingly.

[0132] 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 can detect the temperature 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.

[0133] 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.

[0134] Please also read Fig. 20 and Fig.21 In a 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, and 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, and in response to the output of the logic module 139 being a low-level signal, the switch unit 137 is turned off.

[0135] It can be understood that the OUT terminal of the AND logic module 139 can output a high-level signal only 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 buckle with the first connector 222a to output a high-level signal, and the second interface 131b to buckle with the second connector 222b to output a high-level signal, it is achieved that the switch unit 137 can be turned on when both connectors are buckled.

[0136] Please also read Fig. 22 In some embodiments, the switch unit 137 is integrated into the charging module 136. This can further reduce the number of components on the mainboard 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.

[0137] Please continue reading Fig. 22In some embodiments, the battery cell 21 includes a first battery cell path and a second battery cell path. When the terminal 01 is turned on, that is, the battery cell 21 is discharged, the charge and discharge module 134 supplies power to the load module 133 through the first connector 222a and the line (VBAT1+) where the first interface 131a is located. When the battery cell 21 is charged, the charge and discharge module 134 charges the first battery cell path through 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 through the second connector 222b and the line (VBAT2+) where the second interface 131b is located.

[0138] It can be understood that, since the battery cell 21 and the mainboard 13 are in a discharging state during the assembly process, only the first battery 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.

[0139] 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.

[0140] See also Fig.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-.

[0141] The battery assembly 22 includes a first conductive circuit L1 and a second conductive circuit L2 disposed on the battery circuit board 220. The first end of the first conductive circuit L1 is electrically connected to the first pole tab 211a, the second end of the first conductive circuit L1 is electrically connected to the third pole tab 211c, the third end of the first conductive circuit L1 is electrically connected to the first positive terminal P1+ of the first connector 222a, and the fourth end of the first conductive circuit L1 is electrically connected to the second positive terminal P2+ of the first connector 222a. The first end of the second conductive circuit L2 is electrically connected to the second pole tab 211b, the second end of the second conductive circuit L2 is electrically connected to the first negative terminal P1- of the second connector 222b, and the third end of the second conductive circuit L2 is electrically connected to the second negative terminal P2- of the second connector 222b.

[0142] The main board 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 a first positive terminal P1+ of the first interface 131a, a second end of the third conductive circuit L3 is electrically connected to a positive terminal of the first interface 131b, a third end of the third conductive circuit L3 is electrically connected to a charge and discharge module 134, and a third end of the third conductive circuit L3 is electrically connected to a second end of the charging module 136. A first end of the fourth conductive circuit L4 is electrically connected to a first negative terminal P1- of the second interface 131b, a second end of the fourth conductive circuit L4 is electrically connected to a second negative terminal of the second interface 131b, and a third end of the fourth conductive circuit L4 is electrically connected to a battery protection module 132.

[0143] It can be understood that by setting the ports of the first connector 222a and the first interface 131a to the positive terminal, and the ports of the second connector 222b and the second interface 131b to the negative terminal, the terminal 01 can be turned on only when the first connector 222a and the first interface 131a are fastened together, and the second connector 222b and the second interface 131b are fastened together. In these embodiments, there is no need to add additional control circuits, which can greatly reduce the number of components and effectively reduce costs.

[0144] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope 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, comprising 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, and the tab pad includes at least a first tab pad and a second tab pad, wherein 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 second connector is disposed on the extension portion, and the second connector is electrically connected to the second tab pad.

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 the protection switch tube is electrically connected to the first end of the third conductive circuit, a second end of the protection switch tube is electrically connected to the second electrode pad, and 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 arranged in a spaced relationship; 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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