Mobile power supply, battery detection method and electronic device

Abstract

The application discloses a mobile power supply, a battery detection method and an electronic device. The mobile power supply comprises a metal shell and a battery pack. The battery pack is arranged in the interior of the metal shell. A negative electrode electrically connected with a negative electrode of the battery pack is detachably arranged at a first end of the metal shell. A control circuit board is electrically connected with a positive electrode of the battery pack through the positive electrode. A sampling current and a battery parameter of the battery pack are acquired. The battery capacity and the battery health value of the battery pack are calculated based on the sampling current and the battery parameter. A display panel is detachably arranged at a second end of the metal shell. A display screen arranged on the display panel is connected with the control circuit board and is used for displaying the battery capacity and the battery health value. The battery capacity and the battery health value of the battery pack can be calculated through the preset battery parameter and the real-time collected sampling current. When the battery health value is abnormal, the metal shell and the negative electrode can be detached, and the battery pack can be replaced.

Description

Technical Field

[0001] This application relates to the field of charging device technology, and in particular to mobile power supplies, battery testing methods, and electronic devices. Background Technology

[0002] With the continuous development of technology, various power electronic products play an indispensable role in people's lives, entertainment, and work. Typically, power electronic products have limited battery life, requiring the use of power banks to charge them and extend their lifespan. Most existing power banks have a non-removable structure and cannot monitor the status of the internal battery. When the battery inside the power bank malfunctions or is in poor health, it cannot be replaced in a timely manner, resulting in a short lifespan for the power bank. Summary of the Invention

[0003] This application provides a power bank, a battery testing method, and an electronic device, which can solve the problem that existing power banks cannot be disassembled and cannot monitor the battery, resulting in a short service life.

[0004] The first aspect of this application provides a portable power bank, which includes:

[0005] The metal casing and battery pack are designed with open ends. The interior of the metal casing is used to house the battery pack. A negative electrode is detachably provided at the first end of the metal casing and is electrically connected to the negative electrode of the battery pack.

[0006] The control circuit board has a positive electrode and is electrically connected to the positive electrode of the battery pack. The control circuit board is used to acquire the sampling current and battery parameters of the battery pack, and to calculate the battery capacity and battery health value of the battery pack based on the sampling current and battery parameters.

[0007] The display panel is detachably attached to the second end of the metal housing. The display panel is provided with at least one charging port and a display screen. The at least one charging port is connected to the control circuit board and is used to supply power to the outside according to the control signal of the control circuit board. The display screen is connected to the control circuit board and is used to display the battery capacity and battery health value.

[0008] Furthermore, the control circuit board is equipped with a sampling resistor and a controller. The two ends of the sampling resistor are connected to the controller and the positive electrode, respectively, to obtain the sampling current of the battery pack. The controller is also used to obtain the sampling time, calibrate the battery capacity, and evaluate the coefficient.

[0009] The controller is used to calculate the battery capacity based on the sampled current and sampling time, and to calculate the battery health value based on the battery capacity, the calibrated battery capacity, and the evaluation coefficient.

[0010] When the battery health value is lower than a preset threshold, the controller generates a battery health abnormality signal, which is displayed on the display panel.

[0011] Furthermore, the controller is used to calculate the integral value of the sampled current over the sampling time to obtain the battery capacity; the controller is also used to calculate the ratio of the battery capacity to the calibrated battery capacity, and to calculate the product of the ratio and the evaluation coefficient to obtain the battery health value.

[0012] Furthermore, the display panel includes:

[0013] The motherboard, at least one charging port, and the display screen are located on the motherboard;

[0014] The first extension plate is perpendicular to the motherboard and surrounds the motherboard circumferentially. The first extension plate is provided with a first thread, and the second end of the metal housing is provided with a second thread. The display panel is assembled with the metal housing by the mutual engagement of the first thread and the second thread.

[0015] A stud is located on the side of the motherboard near the metal casing. The stud passes through the control circuit board and is used with a nut to fix the control circuit board and the display panel.

[0016] Furthermore, the power bank further includes a button connected to the controller for inputting battery parameters, including calibrated battery capacity, evaluation factor, overcharge voltage, and cutoff voltage.

[0017] The buttons are located on the side of the motherboard away from the control circuit board, or on the side wall of the metal casing.

[0018] Furthermore, the control circuit board is further provided with a buck-boost circuit, which is connected to at least one charging interface, a sampling resistor and a controller. The controller is used to obtain the sampling voltage through the sampling resistor and control the buck-boost circuit to be turned on or off based on the sampling voltage, so as to control the charging and discharging voltage of the battery pack to be boosted or bucked.

[0019] Furthermore, the battery parameters further include the upper limit temperature of the battery, and the control circuit board is further equipped with a temperature sensor. The temperature sensor is connected to the controller to collect the temperature of the battery pack. In response to the temperature of the battery pack being greater than or equal to the upper limit temperature of the battery, the controller controls the buck-boost circuit to be cut off.

[0020] Furthermore, the power bank further includes a bottom shell, which includes a bottom plate and a second extension plate. The second extension plate is perpendicular to the bottom plate and is arranged around the bottom plate in the circumferential direction. A third thread is provided on the second extension plate, and a fourth thread is provided at the first end of the metal shell. The bottom shell is assembled with the metal shell by the mutual engagement of the third thread and the fourth thread.

[0021] The first end of the negative electrode is fixedly mounted on the side of the base plate near the battery pack, and the second end of the negative electrode is in contact with the negative electrode of the battery pack.

[0022] A second aspect of this application provides a battery testing method, which includes:

[0023] Obtain the input battery parameters and the sampled current of the battery pack;

[0024] Calculate the battery pack's battery capacity and battery health value based on the sampled current and battery parameters;

[0025] The display shows the battery capacity and battery health status.

[0026] A third aspect of this application provides an electronic device comprising a power bank and a device body as described above, wherein the device body is electrically connected to the power bank and receives a charging voltage output by the power bank.

[0027] Unlike existing technologies, the power bank of this application features a detachable structure. The first end of the metal casing can be detached from and assembled with the negative electrode, allowing the negative electrode to be electrically connected to the assembled battery pack, or the negative electrode can be removed to expose the battery pack for easy replacement of faulty batteries. Simultaneously, the second end of the metal casing can be detached from and assembled with the display panel. The power bank of this application acquires real-time sampling current and preset battery parameters from the battery pack via a control circuit board electrically connected to the battery pack. It further calculates the battery capacity and battery health value based on the sampling current and battery parameters, thus achieving battery pack status monitoring. The power bank of this application further displays the battery capacity and battery health value on a display screen electrically connected to the control circuit board, facilitating the removal of the assembled negative electrode and metal casing when the battery health is abnormal, enabling battery pack replacement.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a portable power bank according to an embodiment of this application;

[0031] Figure 2 yes Figure 1 A schematic diagram of the structure of an embodiment of the central display panel;

[0032] Figure 3 yes Figure 1 A schematic diagram of the structure of an embodiment of the control circuit board;

[0033] Figure 4 This is a schematic diagram of the sampling current variation of the battery pack in this application;

[0034] Figure 5 This is a schematic flowchart of an embodiment of the battery testing method of this application;

[0035] Figure 6 This is a schematic diagram of the structure of an embodiment of the electronic device of this application. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions of this application, the mobile power supply, battery testing method, and electronic device provided by this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It is understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0038] Because existing power banks are unibody structures and cannot be disassembled into multiple parts, the internal battery cannot be replaced. Furthermore, existing power banks cannot monitor the status of the internal battery. Therefore, when battery abnormalities or poor battery health occur, the power bank must be replaced, resulting in a short lifespan for the power bank.

[0039] This application provides a portable power bank with a fully detachable structure. It can monitor the status of the internal battery pack and display the battery pack's status on a display screen. When the battery pack malfunctions, the casing can be removed to replace the battery pack, effectively extending the power bank's lifespan. Please refer to [link to relevant documentation]. Figure 1 , Figure 1 This is a structural schematic diagram of an embodiment of the portable power bank of this application. Figure 1As shown, the power bank 1 of this application includes a metal casing 10, a battery pack 20, a control circuit board 30, a display panel 40, and a bottom shell 50.

[0040] Specifically, in this embodiment, the metal casing 10 is open at both ends, the interior of the metal casing 10 is used to house the battery pack 20, the second end of the metal casing 10 is detachably connected to the display panel 40, and the first end of the metal casing 10 is detachably connected to the bottom shell 50.

[0041] Optionally, the battery pack 20 in this embodiment may be composed of one or more battery packs 20, and the multiple batteries may be connected in series or parallel. This application does not limit this.

[0042] Combination Figure 1 For further information Figure 2 , Figure 2 yes Figure 1 A schematic diagram of the structure of one embodiment of the display panel. (See diagram below.) Figure 1 and Figure 2 As shown, the display panel 40 includes a main board 41 and a first extension board 42, and the display panel 40 is provided with at least one charging port 43 and a display screen 44. The at least one charging port 43 is connected to the control circuit board 30 and is used to supply power to the outside according to the control signals of the control circuit board 30; the display screen 44 is connected to the control circuit board 30 and is used to display the battery capacity and battery health value.

[0043] Specifically, the motherboard 41 is provided with at least one charging port 43 and a display screen 44. In this embodiment, the at least one charging port 43 includes a TYPE-C port, a TYPE-A port, a Lightning port, etc., and the display screen 44 in this embodiment can be a liquid crystal display screen.

[0044] In this embodiment, the first extension plate 42 is perpendicular to the main board 41 and is arranged around the main board 41 in the circumferential direction. The first extension plate 42 is provided with a first thread, and the second end of the metal housing 10 is provided with a second thread. The display panel 40 is assembled with the second end of the metal housing 10 by the mutual engagement of the first thread and the second thread.

[0045] like Figure 1 As shown, the bottom shell 50 of this embodiment includes a bottom plate 51 and a second extension plate 52. The second extension plate 52 is perpendicular to the bottom plate 51 and is arranged around the bottom plate 51 in the circumferential direction. A third thread is provided on the second extension plate 52, and a fourth thread is provided on the first end of the metal shell 10. The bottom shell 50 is assembled with the first end of the metal shell 10 by the mutual engagement of the third thread and the fourth thread.

[0046] In this embodiment, the portable power supply 1 further includes a negative electrode 60. The first end of the negative electrode 60 is fixedly disposed on the side of the base plate 51 near the battery pack 20, and the second end of the negative electrode 60 abuts against the negative terminal of the battery pack 20. The first end of the metal casing 10 is detachably provided with the negative electrode 60 to achieve electrical connection between the negative electrode 60 and the negative terminal of the battery pack 20. Optionally, in this embodiment, the negative electrode 60 is electrically connected to the control circuit board 30 through the metal casing 10.

[0047] The control circuit board 30 is provided with a positive electrode 70. The control circuit board 30 is electrically connected to the positive electrode of the battery pack 20 through the positive electrode 70, thereby connecting the negative electrode 60, the battery pack 20 and the charging circuit of the positive electrode 70.

[0048] like Figure 1 As shown, a stud 411 is provided on the side of the main board 41 near the metal housing 10, and a screw hole is provided on the control circuit board 30. The stud 411 passes through the screw hole on the control circuit board 30 and is used with a nut to fix the control circuit board 30 and the display panel 40. At the same time, the first thread and the second thread are used to fix the display panel 40, the control circuit board 30 and the metal housing 10 to each other.

[0049] like Figure 1 As shown, the power bank 1 in this embodiment is further provided with a button 80, which is connected to the control circuit board 30 and used to input battery parameters, including maximum charging current, upper limit battery temperature, calibrated battery capacity, evaluation coefficient, overcharge voltage, and cutoff voltage, etc.

[0050] In this embodiment, button 80 is located on the side of the mainboard 41 opposite to the control circuit board 30 and is connected to the control circuit board 30 via a wire. This embodiment places button 80 on the mainboard 41, facilitating user input of battery parameters while observing the display screen 44. Furthermore, button 80 and the control circuit board 30 are in a relatively perpendicular state; sufficient wiring is required to ensure electrical connection between them, allowing for free adjustment of the thread engagement distance between the display panel 40 and the metal housing 10.

[0051] Alternatively, in another embodiment, the button 80 of this embodiment may also be disposed on the side wall of the metal housing 10. In order to ensure the electrical connection between the button 80 and the control circuit board 30, the position of the control circuit board 30 needs to be adjusted by means of a nut and a stud 411.

[0052] Specifically, in this embodiment, the control circuit board 30 is used to acquire the sampling current and battery parameters of the battery pack 20, so as to calculate the battery capacity and battery health value of the battery pack 20 based on the sampling current and battery parameters. The display screen 44 is connected to the control circuit board 30 through a screen cable to receive and display the battery capacity and battery health value.

[0053] Further reading Figure 3 , Figure 3 yes Figure 1 A schematic diagram of the structure of one embodiment of the control circuit board. (See diagram below.) Figure 3 As shown, the control circuit board 30 in this embodiment includes a sampling resistor 31, a controller 32, a step-up / step-down circuit 33, and a temperature sensor 34.

[0054] Specifically, in this embodiment, the two ends of the sampling resistor 31 are connected to the controller 32 and the positive electrode 70 respectively, for obtaining the sampling current of the battery pack 20. The controller 32 is connected to the button 80, the display screen 44, the step-up / step-down circuit 33 and the temperature sensor 34 respectively.

[0055] In this embodiment, the controller 32 acquires the calibrated battery capacity and evaluation coefficient input by the user using button 80, and simultaneously acquires the sampling time of sampling resistor 31. Based on the sampling current and sampling time, it calculates the battery capacity, and based on the battery capacity, calibrated battery capacity, and evaluation coefficient, it calculates the battery health value. In response to the battery health value falling below a preset threshold, the controller 32 generates a battery health abnormality signal, which is displayed on the display screen 44 of the display panel 40.

[0056] Further reading Figure 4 , Figure 4 This is a schematic diagram of the sampling current variation of the battery pack in this application. Figure 4 In this diagram, a(V1) is the cutoff voltage, i.e., the minimum discharge voltage; b(V2) is the overcharge voltage, i.e., the maximum charging voltage; and t0-t1 is the sampling time. In this embodiment, the controller 32 calculates the battery capacity by integrating the sampled current over the sampling time. The integral calculation formula is as follows:

[0057]

[0058] In the above formula, ηi represents the coulombic efficiency of the power battery during charge and discharge. Its value is determined experimentally. For lithium-ion power batteries, the discharge efficiency is usually considered to be 1, and the charging efficiency is 0.98 to 1 (within 3C charging current); i L (τ) represents the charging and discharging current of the power battery at time τ, which is the sampling current in this embodiment, and z(t) represents the calculated battery capacity.

[0059] Furthermore, in this embodiment, the controller 32 calculates the ratio of the battery capacity to the calibrated battery capacity, and calculates the product of the ratio and the evaluation coefficient to obtain the battery health value. The specific calculation formula is as follows:

[0060]

[0061] In the above formula, Cmax represents the maximum usable capacity of the power battery under the current conditions, which is the calibrated battery capacity in this embodiment, and SOH is the calculated battery health value.

[0062] Optionally, in this embodiment, the preset threshold can be set to 60%, 80%, or any value between 60% and 80%.

[0063] In this embodiment, the boost / buck circuit 33 is connected to at least one charging port 43, a sampling resistor 31, and a controller 32. The controller 32 obtains the sampling voltage through the sampling resistor 31 and controls the boost / buck circuit 33 to turn on or off based on the sampling voltage, thereby controlling the charging and discharging voltage of the battery pack 20 to boost or buck. Simultaneously, the temperature sensor 34 in this embodiment is used to collect the temperature of the battery pack 20. In response to the temperature of the battery pack 20 being greater than or equal to the upper limit temperature of the battery, the controller 32 controls the boost / buck circuit 33 to turn off. Therefore, the power bank 1 in this embodiment can achieve overvoltage, undervoltage, overcurrent, and overtemperature protection for the battery pack 20.

[0064] The portable power bank 1 of this application has a detachable structure. The first end of the metal casing 10 can be detached and assembled with the negative electrode 60, allowing the negative electrode 60 to be electrically connected to the assembled battery pack 20, or the negative electrode 60 can be removed to expose the battery pack 20 for easy replacement of a faulty battery pack 20. Simultaneously, the second end of the metal casing 10 can be detached and assembled with the display panel 40. The portable power bank 1 of this application acquires real-time sampling current of the battery pack 20 and preset battery parameters through a control circuit board 30 electrically connected to the battery pack 20, and further calculates the battery capacity and battery health value of the battery pack 20 based on the sampling current and battery parameters, thereby achieving status monitoring of the battery pack 20. The portable power bank 1 of this application further displays the battery capacity and battery health value of the battery pack 20 through a display screen 44 electrically connected to the control circuit board 30, facilitating the removal of the assembled negative electrode 60 and metal casing 10 when the battery health is abnormal, enabling replacement of the battery pack 20.

[0065] Meanwhile, the battery capacity algorithm of this application can calculate the battery capacity of batteries of different brands by customizing the overcharge voltage and cutoff voltage, and the battery health value algorithm also adopts the intermediate segment calculation method. The algorithm is simple and easy to implement, and has high practical performance.

[0066] This application also provides a battery detection method, which can be applied to the mobile power bank 1 in any of the above embodiments. Please refer to [link to relevant documentation]. Figure 5 , Figure 5 This is a schematic flowchart of an embodiment of the battery testing method of this application. Figure 5 As shown, specifically, the battery detection method of this disclosure embodiment may include the following steps:

[0067] Step S11: Obtain the input battery parameters and the sampled current of the battery pack.

[0068] Before executing step S11, the display panel 40, control circuit board 30, battery pack 20, bottom shell 50, and metal shell 10 need to be assembled, and the power supply 1 needs to be powered on. The controller 32 acquires the battery parameters input by the user through button 80 and collects the sampling current of battery pack 20 through sampling resistor 31.

[0069] Step S12: Calculate the battery capacity and battery health value of the battery pack based on the sampled current and battery parameters.

[0070] In this embodiment, the controller 32 calculates the integral value of the sampling current over the sampling time to obtain the battery capacity of the battery pack 20. Specifically, after the mobile power supply 1 is powered on, the battery pack 20 is in a fully charged state, and the sampling time can be the time from the full charge voltage release to the end of the discharge of the battery pack 20.

[0071] Furthermore, in this embodiment, the controller 32 calculates the ratio of the battery capacity to the calibrated battery capacity, and calculates the product of the ratio and the evaluation coefficient to obtain the battery health value of the battery pack 20, wherein the evaluation coefficient can be the charging and discharging efficiency of the battery pack 20.

[0072] Step S13: Display the battery capacity and battery health value on the screen.

[0073] In this embodiment, the controller 32 sends the calculated battery capacity and battery health value to the display screen 44, and displays the battery capacity and battery health value on the display screen 44.

[0074] Optionally, the controller 32 in this embodiment can also generate a battery health abnormality signal when it determines that the battery health value is lower than a preset threshold, and the display panel 40 displays the battery health abnormality signal to prompt the user to replace the battery pack 20.

[0075] This application also provides an electronic device, please refer to... Figure 6 , Figure 6 This is a schematic diagram of the structure of an embodiment of the electronic device of this application. Figure 6As shown, the electronic device 90 of this embodiment includes a power bank 91 and a device body 92. The device body 92 is electrically connected to the power bank 91 and receives the charging voltage output by the power bank 91. The power bank 91 in this embodiment is the power bank 1 described in any of the above embodiments, and will not be repeated here.

[0076] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A mobile power supply, characterized by, The mobile power supply comprises: a metal shell and a battery pack, two ends of the metal shell are open, an inside of the metal shell is used for accommodating the battery pack, a first end of the metal shell is detachably provided with a negative electrode, and the negative electrode is electrically connected with a negative electrode of the battery pack; a control circuit board, the control circuit board is provided with a positive electrode, the control circuit board is electrically connected with a positive electrode of the battery pack through the positive electrode, the control circuit board is used for acquiring a sampling current and a battery parameter of the battery pack, calculating a battery capacity and a battery health value of the battery pack based on the sampling current and the battery parameter, and the battery parameter comprises a calibrated battery capacity, an evaluation coefficient, an overcharge voltage and a cut-off voltage; a display panel, the display panel is detachably arranged at a second end of the metal shell, the display panel is provided with at least one charging interface and a display screen, the at least one charging interface is connected with the control circuit board, and the control circuit board is used for supplying power to the outside according to a control signal of the control circuit board, and the display screen is connected with the control circuit board and is used for displaying the battery capacity and the battery health value.

2. The mobile power source of claim 1, wherein, The control circuit board is provided with a sampling resistor and a controller, two ends of the sampling resistor are connected with the controller and the positive electrode respectively, and the sampling resistor is used for acquiring the sampling current of the battery pack, and the controller is further used for acquiring a sampling time, a calibrated battery capacity and an evaluation coefficient; The controller is used for calculating the battery capacity based on the sampling current and the sampling time, and calculating the battery health value based on the battery capacity, the calibrated battery capacity and the evaluation coefficient; In response to the battery health value being lower than a preset threshold value, the controller is used for generating a battery health abnormal signal, and the battery health abnormal signal is displayed through the display panel.

3. The mobile power source of claim 2, wherein, The controller is used for calculating an integral value of the sampling current in the sampling time to obtain the battery capacity, and calculating a ratio of the battery capacity to the calibrated battery capacity and a product of the ratio and the evaluation coefficient to obtain the battery health value.

4. The mobile power source of claim 2, wherein, The display panel comprises: a main plate, the at least one charging interface and the display screen are arranged on the main plate; a first extension plate, the first extension plate is arranged perpendicularly to the main plate and along a circumferential direction of the main plate, the first extension plate is provided with a first thread, a second end of the metal shell is provided with a second thread, and the display panel is assembled with the metal shell through mutual screwing of the first thread and the second thread; a stud is arranged on a side of the main plate close to the metal shell, the stud passes through the control circuit board, and the stud cooperates with a nut to fix the control circuit board and the display panel.

5. The mobile power source of claim 4, wherein, The mobile power supply further comprises a key, the key is connected with the controller and is used for inputting the battery parameter; The key is arranged on a side of the main plate away from the control circuit board, or the key is arranged on a side wall of the metal shell.

6. The mobile power source of claim 5, wherein, The control circuit board is further provided with a boost-buck circuit connected with the at least one charging interface, the sampling resistor and the controller, the controller is used for obtaining a sampling voltage through the sampling resistor and controlling the boost-buck circuit to be turned on or turned off based on the sampling voltage, so as to control the boost-buck of the charging and discharging voltage of the battery pack.

7. The mobile power source of claim 6, wherein, The battery parameters further include a battery upper limit temperature, the control circuit board is further provided with a temperature sensor connected with the controller and used for collecting the temperature of the battery pack, and the controller controls the boost-buck circuit to be turned off in response to the temperature of the battery pack being greater than or equal to the battery upper limit temperature.

8. The mobile power source of claim 1, wherein, The power bank further includes a bottom shell including a bottom plate and a second extension plate, the second extension plate is arranged perpendicularly to the bottom plate and along the circumference of the bottom plate, the second extension plate is provided with a third thread, the first end of the metal shell is provided with a fourth thread, and the bottom shell is assembled with the metal shell through the mutual screwing of the third thread and the fourth thread. The first end of the negative electrode is fixedly arranged on the side of the bottom plate close to the battery pack, and the second end of the negative electrode abuts against the negative electrode of the battery pack.

9. A battery detection method, characterized by, The application of the power bank as claimed in any one of claims 1-8, the method comprises: obtaining the input battery parameters and the sampling current of the battery pack; calculating the battery capacity and the battery health value of the battery pack based on the sampling current and the battery parameters; displaying the battery capacity and the battery health value on the display screen.

10. An electronic device, comprising: The electronic device includes the power bank as claimed in any one of claims 1-8 and a device main body, the device main body is electrically connected with the power bank and receives the charging voltage output by the power bank.

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