Modularized portable power supply system

Abstract

The invention belongs to the technical field of field power supply, and relates to a modular portable power supply system which comprises a battery box and an integrated clamping seat connected with the battery box, the battery box is connected with an alternating current / direct current dual-purpose charger, and the battery box is charged through a charging cable. A protection circuit is arranged in the battery box to realize discharge protection of a battery pack, a control circuit controls a power conversion circuit, and a self-adaptive module outputs a voltage of 3V-16.8 V according to information of an output interface and can charge two batteries in a spectrum at the same time. The charging function of each module of the charger is integrated, and the charger is matched and unified with a power utilization interface of a power utilization module, is suitable for charging modules such as a combined battery box, an information terminal / digital control wristwatch, a communication terminal and the like and a standard secondary lithium battery, and supports a quick charging function.

Description

Technical Field

[0001] The invention belongs to the technical field of field power supply and relates to a modular portable power supply system. Background Art

[0002] At present, the power supply of camping teams mainly relies on the team's portable power supply, which has a single power supply guarantee method, especially the inability to recharge the power, which limits its use. In addition, the current team's portable power supply mainly adopts an integrated structure. Although the structure is compact, the portable maintenance inspection needs to be disassembled, which has high technical requirements for maintenance personnel and is not suitable for the convenience principle of the field environment.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a modular portable power supply system, which is conducive to improving the maintenance interchangeability and reliability of the device.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] On the one hand, the present invention provides a modular portable power system, including a battery box and an integrated card holder connected to the battery box, wherein the battery box is connected to an AC / DC dual-purpose charger, and the battery box is charged through a charging cable; the battery box is internally provided with:

[0007] A battery pack, wherein the battery pack is charged / discharged through a first constant current and constant voltage power supply module via a first interface; the first constant current and constant voltage power supply module is connected to a PD interface circuit;

[0008] A control circuit, the control circuit includes a switch and display circuit, a single-chip microcomputer, and a power control circuit connected in sequence, the single-chip microcomputer is respectively connected to a voltage / current detection circuit and a communication circuit, the power control circuit is also connected to a second constant current and constant voltage power supply module, the communication circuit is also connected to an integrated card holder, and the second constant current and constant voltage power supply module is respectively connected to the integrated card holder and the battery pack to be charged;

[0009] The battery cell anti-reverse protection circuit is used to implement anti-reverse protection for the battery pack.

[0010] Specifically, a plurality of accommodating cavities for installing battery packs are reserved in the battery box, a plurality of batteries are installed in parallel in each accommodating cavity, and the battery packs in adjacent accommodating cavities are connected in series.

[0011] Specifically, the first interface is exposed and arranged at one end of the housing.

[0012] Specifically, a second interface is exposed at one end of the shell, and the second interface is arranged opposite to the first interface.

[0013] Specifically, when the battery pack needs to be charged, the access power source is any one of a photovoltaic module, a city power supply, a hand-cranked generator or a car battery.

[0014] Specifically, the integrated card holder has multiple channels built in to adapt to different devices to be charged.

[0015] Specifically, the integrated card holder adopts a plastic shell, and the circuit board in the integrated card holder is made by a potting process.

[0016] Specifically, the AC / DC dual-purpose charger includes an input interface and an output interface, wherein the input interface can realize AC 200V mains power and vehicle-mounted DC input; and the output interface includes different interfaces adapted to a variety of devices.

[0017] Specifically, the input interface adopts a DC input socket JX-DC-4KZ and an AC input socket JX-AC-3JT, and the output interface adopts a 9-core socket compatible with the battery box.

[0018] Specifically, the various devices include a battery box, an information terminal, a digital control watch, a communication terminal or a battery.

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] The PD interface circuit in the present invention charges the battery box through the first interface, or discharges the mobile phone and other devices containing the PD protocol through the battery box, and the charging power and voltage both meet the requirements of the PD protocol; the control circuit can control the power on and off of the battery box, and monitor the relevant data fed back by the voltage / current detection circuit in real time, thereby effectively protecting the battery pack in a safe working state; the card holder is integrated with multiple channels, which can charge multiple batteries or power the equipment at the same time, and the detection circuit inside the card holder can summarize the detected voltage, current and other information to the single-chip microcomputer, and the single-chip microcomputer adjusts the voltage or current according to the set charging and output conditions to realize output management, and displays the working status of the card holder through the display circuit to realize human-computer interaction.

[0021] The power supply system provided by the present invention includes a battery box and a charger. The battery box has a built-in protection circuit to realize discharge protection of the battery pack. The control circuit controls the power conversion circuit. The adaptive module outputs a voltage of 3V to 16.8V according to the output interface information, and can charge two batteries in the same model spectrum at the same time. The charging function of each module of the charger is integrated, and the power interface of the power module is adapted uniformly. It is suitable for charging modules such as combined battery boxes, information terminals / digital control watches, communication terminals, and standard secondary lithium batteries, and supports fast charging function. The battery box is composed of battery pack cells, charge and discharge protection circuits (first constant current and constant voltage power supply circuits), power detection and display modules, power switches, output adaptation circuits (second constant current and constant voltage power supply circuits), connecting cables and other components, and has functions such as power supply output, charging, and power indication; it is adapted uniformly with the power interface of the power module, supports AC 220V mains and vehicle-mounted DC input, and has a wide voltage input function (AC90~265V). BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 A structural diagram of a battery box provided by the present invention;

[0025] Figure 2 A block diagram of the working principle of the battery box provided by the present invention;

[0026] Figure 3 It is a structural diagram of the battery cell anti-reverse protection circuit in the present invention;

[0027] Figure 4 A principle block diagram of a voltage / current detection circuit provided by the present invention;

[0028] Figure 5 A principle block diagram of a power supply control circuit provided by the present invention;

[0029] Figure 6 The PD interface circuit principle block diagram provided by the present invention;

[0030] Figure 7 A schematic diagram of the structure of a flexible film folding assembly provided by the present invention;

[0031] Figure 8 A structural diagram of a combined battery box provided by the present invention;

[0032] Fig. 9 A structural diagram of the integrated card holder provided by the present invention;

[0033] Fig.10 A working principle diagram of the integrated card holder provided by the present invention;

[0034] Fig.11 A working principle diagram of the AC / DC dual-purpose charger provided by the present invention;

[0035] Fig.12 A circuit connection block diagram of the AC / DC dual-purpose charger provided by the present invention;

[0036] Fig.13 A connection block diagram of a constant current and constant voltage power supply circuit of an AC / DC dual-purpose charger provided by the present invention;

[0037] Fig.14 A control circuit connection block diagram of the AC / DC dual-purpose charger provided by the present invention;

[0038] Fig.15 A connection block diagram of the AC / DC dual-purpose charger provided by the present invention when connected to different charging devices;

[0039] Fig.16 A block diagram of the modular portable power system provided by the present invention;

[0040] Fig.17 A flow chart of charging an electrical device using a modular portable power system provided by the present invention. DETAILED DESCRIPTION

[0041] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples consistent with some aspects of the present invention as detailed in the appended claims.

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] Example 1

[0044] See also Fig.16 As shown, this embodiment provides a modular portable power system, including a battery box and an integrated card holder connected to the battery box, the battery box is connected to an AC / DC dual-purpose charger, and the battery box is charged through a charging cable; the battery box is provided with:

[0045] A battery pack, wherein the battery pack is charged / discharged through a first constant current and constant voltage power supply module via a first interface; the first constant current and constant voltage power supply module is connected to a PD interface circuit;

[0046] A control circuit, the control circuit comprising a switch and a display circuit, a single-chip microcomputer, and a power control circuit connected in sequence, the single-chip microcomputer is respectively connected to a voltage / current detection circuit and a communication circuit, and the power control circuit is also connected to a second constant current and constant voltage power supply module;

[0047] The communication circuit is connected to the integrated card holder, and the second constant current and constant voltage power supply module is respectively connected to the integrated card holder and the battery pack to be charged;

[0048] The battery cell anti-reverse protection circuit is used to implement anti-reverse protection for the battery pack.

[0049] Specifically, the battery box is reserved with multiple cavities for installing battery packs, and multiple batteries are installed in parallel in each cavity, and the battery packs in adjacent cavities are connected in series. Optionally, in this embodiment, each battery box is reserved with 3 cavities, and 2 batteries are installed in parallel in each cavity, that is, each battery box can be filled with 6 batteries, each battery can be removed and replaced independently, in the form of 3 series and 2 parallel, and has the function of not completely losing system power supply after the battery core is partially damaged. The battery box structure is shown in FIG. Figure 1 .

[0050] Specifically, according to the functional requirements of the battery box, the battery box adopts a filling type structure, with built-in PD interface circuit, control circuit, voltage / current detection circuit and battery cell anti-reverse protection circuit. The PD interface circuit is used to complete the charging of the built-in 6 batteries and adapt the PD protocol output; the control circuit is used to control the switch of the battery box, adapt the output and power indication, etc. The adapted output can be connected to the adapted battery box through the card holder to complete the charging management; the battery cell anti-reverse protection circuit protects the battery box. For the block diagram of the working principle of the battery box, see Figure 2 .

[0051] Among them, ① the battery cell anti-reverse protection circuit can ensure that the battery cell is not damaged when it is reversely connected, see Figure 3 , the battery cell reverse protection circuit uses a hardware switch to achieve reverse protection. Taking the B1 group battery as an example, when the battery is installed normally, Q1 and Q7 are turned on, Q4 and Q10 are turned on, and the negative electrode is turned on; when the battery is installed reversely, Q1 and Q7 are disconnected, Q4 and Q10 are closed, and the negative electrode is not turned on, realizing the reverse installation protection function. ② Voltage / current detection circuit, used to detect the battery voltage, current and temperature data, and control the battery charging or discharging action according to the above data information. Its principle block diagram can be found in Figure 4③ The control circuit is used to control the on / off of the system. It adopts the soft switch form. The switch does not directly control the on / off. It adopts the software detection form. After the button SW1 is pressed, the microcontroller detects that Switch_PA8 is pulled low, and Q24 is turned on at the same time. The button remains on until it is released. During this period, the microcontroller pin MPC_PA7 is set high to drive Q24 to remain on, ensuring that the switch circuit can remain on after the button is released; if you need to shut down, press the button again. The microcontroller determines the content to be executed by detecting the time when the Switch_PA8 pin is pulled low. See Figure 5 ④PD interface circuit, used to charge the battery box through the first interface (Type-C interface), or discharge the battery box to mobile phones and other devices with PD protocol. The charging power and voltage meet the requirements of PD3.0 protocol. For its principle block diagram, see Figure 6 .

[0052] It should be noted that in this embodiment, combined with the hardware structure of the battery box, the built-in software of the battery box includes battery protection, switch control and intelligent charging management. Battery protection adopts a mature software solution, including temperature, voltage and current detection, and the current power and working status are calculated by integrating the above data; switch control, the microcontroller detects the length of time the button is pressed to determine the switch state; intelligent charging management software, by identifying the connected interface, adjusts the output voltage and current according to the battery information built into the interface, charges the connected battery pack and displays the charging status. The above software runs on the STC8G2K64S4-36I-LQFP48 microcontroller through the keil development environment.

[0053] Specifically, the first interface is exposed at one end of the shell, and the second interface is also exposed at one end of the shell, and the second interface is arranged opposite to the first interface. According to the functional requirements of the battery box, the first interface uses a Type-C interface, a No. 0 connector, and a 9-core socket is selected to meet the power demand. The interface is close to one end, and a large surface is provided with a power display.

[0054] Specifically, the other end of the battery box shell is provided with a connecting portion for connecting to another battery box. In actual use, the battery box can be divided into two battery boxes, a main battery box and a secondary battery box, which can be used independently or in combination through the connecting portion (connector).

[0055] Specifically, the battery box includes a matching shell and cover. According to the function and hardware design requirements of the battery box, the shell is made of plastic, which is conducive to insulation and weight reduction, and the cover is made of metal, which is conducive to suppressing deformation and improving strength, and the overall size can be reduced without reducing strength.

[0056] Furthermore, the battery box has filling requirements. The battery box adopts a spring + contact method, in which the spring is used for the positive electrode and the contact is used for the negative electrode, which can ensure that the user does not damage the positive electrode of the plastic seal of the battery cell when filling the battery. Specifically, the filling size of the battery box is designed around the 18650 battery. The battery box size is 175mm (length) × 78mm (width) × 28mm (thickness), which can be adapted to the clip. The battery box uses a non-metallic shell to achieve lightweight. After each battery box is filled with 6 batteries, the total weight is about 0.45 kg.

[0057] Specifically, when the battery pack needs to be charged, the access power source is any one of a photovoltaic module, a city power supply, a hand-cranked generator or a car battery.

[0058] It should be noted that the photovoltaic module mainly includes solar panels, junction boxes, cascade cables, output cables, fixed head cloth, etc. The solar panels use monocrystalline silicon as the power generation chip material, which is pressed with multiple layers of flexible auxiliary materials into a lightweight and portable flexible film folding module. The outgoing part uses an IP55 waterproof split junction box, which is connected in series and parallel through cascade cables, and the output cables are used to supply power to external devices. The photovoltaic controller built into the cascade module supplies power to external loads, and multiple modules can be connected in series and parallel through the cascade circuit built into the cascade module to achieve high-power output.

[0059] Specifically, the photovoltaic module is a flexible film folding module. Preferably, the flexible film folding module includes ETFE film, POE glue, solar panels, support plates, POE glue and high-strength camouflage cloth distributed from top to bottom. The module surface uses a high-permeability fluorine-containing ETFE film surface packaging material; the support plate uses a lightweight and high-strength aviation aluminum-magnesium alloy 7075 aluminum alloy; POE film is used instead of traditional EVA film as an adhesive; camouflage cloth is simultaneously used as the outer frame and back material of the module, see Figure 7 . Further preferably, the edge of the flexible film folding component is designed with a metal hanging hole to facilitate the fixation of the component to a backpack, tent, etc.; the flexible film folding component is added with a sealed and waterproof multifunctional junction box; the corners of the flexible film folding component are designed with eye-catching openings, and the cascade components are fixed by straps. The photovoltaic panel design adopts a three-level folding structure, which divides the 50W component into 6 equal parts, with a 20mm interval between chips and a chip distance of 15mm from the edge. At the same time, a head cloth is designed on the edge, and a junction box, cascade cable, and output cable are configured to achieve the function of cascade output of components of the same type, which is easy to carry and reliable to unfold and fold.

[0060] Specifically, the AC / DC dual-purpose charger includes an input interface and an output interface. The input interface can realize AC 200V mains power and vehicle-mounted DC input, and has a wide voltage input function (AC90~AC265V); the output interface includes different interfaces adapted to a variety of devices, including modules suitable for combined battery boxes, information terminals / digital control watches, communication terminals, and standard secondary lithium batteries, and supports fast charging function.

[0061] Furthermore, the AC / DC dual-purpose charger is composed of an AC / DC dual-purpose charger host, an AC cable, a DC cable and a charging cable. The charger should have the following functions: battery charging function; voltage stabilization output function; status indication function; short circuit protection function. After the AC / DC dual-purpose charger is connected to an AC power source, its internal charging circuit automatically performs output to charge the battery and displays the current working status. For the working principle diagram of the charger, see Fig.11 , the circuit connection diagram can be found in Fig.12 .

[0062] It should be noted that the AC / DC dual-purpose charger has DC and AC input modes. The DC input mode is suitable for the vehicle power supply range, and the AC input mode can support wide voltage input (AC90~AC265V). It has two independent charging output circuits. The output interface completes charging management by reading the battery pack or integrated card holder information through data, and displays the current working status by setting the indicator light. Among them, the AC / DC dual-purpose charger has a built-in third constant current and constant voltage power supply circuit and control circuit III:

[0063] ①The third constant current and constant voltage power supply circuit

[0064] The third constant current voltage power supply is directly connected to the integrated card holder to charge the adapter battery pack. The third constant current and constant voltage power supply needs to connect many types of batteries, and the charging voltage and charging current are different. Therefore, the third constant current and constant voltage power supply needs to have the function of adjusting the voltage and current arbitrarily. Based on this design, the third constant current and constant voltage power supply adopts a four-switch mode with a buck-boost control mode, in which the voltage and current can be adjusted by IPWM0.6 and IPWM0.7 output, such as Fig.13 shown.

[0065] The current regulation calculation requirements are as follows:

[0066] ILIM=(VREF / RILIM1)×(RSS1 / RSNS1)=(1.21V / RILIM1)×(1kΩ / 10mΩ)=(1.21V / RILIM1)×100000.

[0067] The voltage regulation calculation requirements are as follows: VOUT = VFB_REF × (1 + RUP / RDOWN)

[0068] =1.22V×(1+RUP / RDOWN).

[0069] ②Control circuit III

[0070] Control circuit III includes power supply program control, switch control, power module voltage detection, charging current detection, battery terminal voltage detection, status display, power supply circuit and 485 interface circuit, such as Fig.14 As shown. Among them, the power supply program control Iadj and Vadj are used to control the output voltage and current of the third constant current constant voltage power supply circuit; the switch control CHG_CON is used to control the on and off of the battery pack charging; the power module voltage detection MKV_ADC is used to detect whether the program-controlled voltage meets the charging voltage requirements; the charging current detection CHGI_ADC is used to detect whether the program-controlled current meets the charging current requirements; the battery terminal voltage detection CHGV_ADC is used to detect the battery charging status; the status display is used to display the charging power, charging status, etc.; the power supply circuit is used to power the single-chip microcomputer; the 485 interface circuit is used to obtain the battery pack information connected to the integrated card holder, such as Fig.14 shown.

[0071] In order to cooperate with the above-mentioned hardware to realize the corresponding functions, the AC / DC dual-purpose charger in this embodiment has built-in corresponding software, including communication and charging control programs: communication is used to transmit the voltage and function required by the current charging box through the RS485 interface; charging control, the microcontroller detects the adapter battery information and controls the programmable power supply output through the programmable signal. After adjustment, turn on the switch to control the charging output, charge the connected battery pack and display the charging status; the software runs on the GD32F103CBT6 microcontroller through the Keil development environment.

[0072] Specifically, according to the functions and hardware design requirements of the AC / DC dual-purpose charger, it is determined that the AC / DC dual-purpose charger adopts a metal shell, which is conducive to heat dissipation. The AC / DC dual-purpose charger has charging management and AC power conversion, among which the heat dissipation mainly solves the heat generated during AC power conversion and DC charging. The output adopts the form of connectors, and the connectors use the military-standard DC input socket JX-DC-4KZ and AC input socket JX-AC-3JT. The output uses a 9-core socket that can be consistent with the power box.

[0073] Specifically, see Fig. 9 The integrated card holder has multiple built-in channels to adapt to different devices to be charged. It can charge multiple circuit batteries or power devices at the same time. According to the integrated card holder function and hardware design requirements, the integrated card holder adopts a plastic shell, and the circuit board in the integrated card holder is made by potting technology, which is conducive to overall heat dissipation. The working principle of the integrated card holder can be found in Fig.10As shown, it has the following functions: a) battery charging function; b) status display function; c) short circuit protection function.

[0074] Furthermore, the integrated card holder has multiple fourth constant current and constant voltage power supply circuits, communication circuits and control circuit IV built in. Among them, the fourth constant current and constant voltage power supply circuit is used to convert the input DC power supply into a power supply that can charge the adapter battery; the control circuit IV is used to complete the charging on and off through the control circuit, complete the working status indication through the display circuit, and complete the voltage and current detection through the detection circuit. Specifically:

[0075] ①The fourth constant current and constant voltage power supply circuit

[0076] The fourth constant current and constant voltage power supply circuit converts the DC power supply into a constant current and constant voltage power supply that can charge the battery pack, and controls the output on and off through the power management board. The power supply is designed using a buck-boost circuit.

[0077] The charging station has 7 built-in output channels. The charging current output power is designed according to the characteristics of each battery, ranging from 5 to 10W, and the total power is no more than 50W.

[0078] ②Control circuit IV

[0079] The built-in control circuit IV of the integrated card holder controls the on-off of the power supply to the output through a multi-channel charging control circuit. The detection circuit summarizes the detected voltage, current and other information to the microcontroller. The microcontroller adjusts the voltage or current according to the set charging and output conditions to realize output management, and displays the working status of the charging holder through the display circuit to realize human-computer interaction.

[0080] In order to cooperate with the above hardware to realize the corresponding functions, the integrated card holder in this embodiment has built-in corresponding software. The integrated card holder software is mainly composed of self-test module, serial port communication, status detection, button detection, switch control and status display. The self-test module is mainly used for power-on self-test; serial port communication is mainly used to complete program burning and maintainability testing; status detection is mainly used to complete the detection of constant current and constant voltage power supply and output voltage and current; switch control is mainly used to complete the on and off of battery pack charging; status display is mainly used to complete the working status of the charging seat and the display of charging power. The software runs on the GD32F103CBT6 microcontroller through the keil development environment.

[0081] Further, see Fig.15 As shown, this embodiment provides a connection block diagram of an AC / DC dual-purpose charger connected to different charging devices, and the different charging devices include a battery box, an information terminal, a digital control watch, a communication terminal or a battery.

[0082] Example 2

[0083] On the basis of Example 1, the difference from Example 1 is that the battery box in this embodiment adopts the form of 6 series and 2 parallels, and the battery box includes: a battery pack, a charge and discharge protection circuit, a power detection and display module, a power switch, an output adapter circuit, a connecting cable and other components. Among them, the battery pack is composed of 12 cells. When the cells and other structural materials are put into the shell, a certain pre-tightening force needs to be applied. The specific assembly process is as follows:

[0084] ① Battery cells: Take out the qualified secondary battery cells and corresponding auxiliary materials respectively. Observe whether the surface of the battery cells is damaged or scratched; observe whether the size of the rigid flame retardant sheet, buffer foam and is consistent with the design size, and whether the surface is damaged or scratched. If there is any problem, record it as scrapped and replace the battery cells and auxiliary materials that meet the requirements. If there is no problem, proceed to the next step.

[0085] ② Pretreatment: Insulate all cells and apply insulating polyimide tape to the sides of the battery and the connection between the tabs and the cells. Divide the 12 cells and auxiliary materials into 2 parts, with 6 cells in each part.

[0086] ③Laser welding: Connect the tabs of 6 battery cells in series, and use laser welding to weld the tabs to the connecting copper busbar (under the condition of 150N tensile force, the tab welding points are continuous and considered qualified), and finally lead out the total positive and negative interfaces of the battery pack.

[0087] ④ Welding circuit interface: Weld the voltage collection line on the total positive, total negative and connecting copper bars of the battery pack for the collection of voltage, and weld the collection line to different circuit slave control interfaces in the order of single cells, and then weld the communication connector to the single chip interface of the power management to read the battery temperature, voltage and other information. The total positive line of the battery pack is connected to the relay. The signal line of the relay is welded to the power management interface. The welding point is continuous under the tensile force of 150N, which is considered qualified.

[0088] ⑤Insulation treatment: stick insulating glue on the battery cell ears, cover the welding points with high-temperature insulating glue, stick insulating tape and insulating plates on the connectors and connecting plates, and fix and insulate the ears, connectors and connecting plates at the same time.

[0089] ⑥ Shelling (key process): Put the above-mentioned modules in series into the shell and use a homemade pressurizing device to pressurize them. During this process, a pressure sensor is used to monitor the pressure of the battery module.

[0090] ⑦ Fixation: Use screws to fix the load-bearing parts of the power system, and use glue and screws to fix the circuit board to the module.

[0091] ⑧Weight test: Use an electronic scale to weigh the power product. If the battery pack weight is less than or equal to 2.2kg, it is considered qualified.

[0092] ⑨Performance testing: Use Arbin battery tester to perform performance testing on the power system. In the final product, if the battery pack can discharge 0.5kWh of electricity, it is qualified.

[0093] In the above-mentioned battery box, the display function integration includes: charging and discharging protection circuit, power detection and display module, power switch, output adapter circuit, connecting cables and other components, which are mainly realized through the control circuit.

[0094] Among them, the control circuit adjusts the DC-DC output voltage and current after obtaining the power parameter information according to the model of the connected rechargeable battery. After the adjustment is completed, the switch circuit is turned on to realize the power supply output to the power-consuming equipment. The charge and discharge protection circuit (voltage / current monitoring circuit) is used to monitor the voltage, current and temperature of the battery cell to protect the battery in a safe working state. The protection board adopts the domestic analog front end + low-power MCU mode to realize battery protection and power reading. At the same time, the power is monitored by the single-chip microcomputer, and the power indicator is installed to display the current remaining power. The DC-DC power supply circuit is used to convert the on-board DC power supply into a power supply output or a charging power supply. The control circuit realizes the output adjustment of the DC-DC power supply to adapt to various interfaces. The DC-DC power supply circuit adopts a power supply circuit controlled by 4 switch MOS, adopts a constant current and constant voltage control method, and the voltage and current are controlled and adjustable. It uses Nanxin's SC8701 power supply chip, the input voltage range meets 10V~40V, and the output meets 5V~28V working voltage. The voltage and current can be adjusted in real time according to the IPWM pin.

[0095] In addition, this embodiment also provides a battery box module structure, see Figure 8 , consisting of a plurality of detachably connected battery boxes, wherein the battery boxes are partially or fully as described above, and a plurality of the battery boxes are connected in series.

[0096] Example 3

[0097] Based on Example 1, this embodiment also provides a modular portable power system, the principle block diagram of which is shown in FIG. Fig.16 When using it to charge electrical equipment, the flow chart is as follows Fig.17 . The power supply system consists of a battery box, an integrated card holder, an AC / DC dual-purpose charger and a charging cable; the battery box mainly completes energy storage and electric energy release; the integrated card holder mainly completes charging of 18650 or 17345 batteries; the AC / DC dual-purpose charger mainly completes charging of the battery box. The battery box has energy storage and energy release capabilities; it has overvoltage, overcurrent, and short-circuit protection functions. The integrated card holder has a charging function; it has a short-circuit protection function; it has a working status indication function. The AC / DC dual-purpose charger has a battery box charging function; it has a short-circuit protection function.

[0098] In summary, this embodiment is aimed at the current situation of increasing number of electronic devices and prominent charging problems, focusing on solving the problems of large size and heavy weight of existing batteries. According to the idea of ​​reliable, stable, portable, easy to use and sufficient energy, the existing "one pack, one power, one charging and one interface" is optimized to a modular portable power system of "one charging, multiple packs, multiple power and multiple interfaces", which includes a battery box, an integrated card holder and a charger (AC / DC dual-purpose charger). In this power system, the lightweight design of the battery box structure realizes the high specific energy index requirements of the battery, and the single battery can achieve a capacity greater than 3Ah, and has the function of not completely losing the system power supply after the battery core is partially damaged. At the same time, the battery box has a built-in protection circuit to realize the discharge protection of the battery pack, the control circuit controls the power conversion circuit, and the adaptive module outputs a voltage of 3V to 16.8V according to the output interface information, and can charge 2 batteries in the same spectrum at the same time. The charger (AC / DC dual-purpose charger) integrates the charging functions of each module, and is suitable for charging modules such as combined battery boxes, information terminals / digital control watches, communication terminals, and standard secondary lithium batteries, and supports fast charging function. It should be emphasized that in order to adapt to the power interface of the power module, the battery box is composed of battery cells, charge and discharge protection circuits, power detection and display modules, power switches, output adapter circuits, connecting cables and other components. It has power output, charging, power indication and other functions, and is adapted to the power interface of the power module. It supports AC 220V mains and vehicle-mounted DC input, and has a wide voltage input function (AC90V~AC265V).

[0099] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0100] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A modular portable power system, characterized in that: It includes a battery box and an integrated card holder connected to the battery box, wherein the battery box is connected to an AC / DC dual-purpose charger, and the battery box is charged through a charging cable; the battery box is internally provided with: A battery pack, wherein the battery pack is charged / discharged through a first constant current and constant voltage power supply module via a first interface; the first constant current and constant voltage power supply module is connected to a PD interface circuit; A control circuit, the control circuit comprising a switch and a display circuit, a single-chip microcomputer, and a power control circuit connected in sequence, the single-chip microcomputer is respectively connected to a voltage / current detection circuit and a communication circuit, and the power control circuit is also connected to a second constant current and constant voltage power supply module; The communication circuit is connected to the integrated card holder, and the second constant current and constant voltage power supply module is respectively connected to the integrated card holder and the battery pack to be charged; A cell anti-reverse protection circuit, used to provide anti-reverse protection for the battery pack; The first interface is exposed at one end of the shell, and a second interface is also exposed at one end of the shell. The second interface is arranged opposite to the first interface.

2. The modular portable power system according to claim 1, characterized in that: The battery box is provided with a plurality of accommodating cavities for installing battery packs, a plurality of batteries are installed in parallel in each accommodating cavity, and the battery packs in adjacent accommodating cavities are connected in series.

3. The modular portable power system according to claim 1, characterized in that: When the battery pack needs to be charged, the access power source is any one of photovoltaic components, city electricity, hand-cranked generator or car battery.

4. The modular portable power system according to claim 1, characterized in that: The integrated card holder has multiple channels built in to adapt to different devices to be charged.

5. The modular portable power system according to claim 4, characterized in that: The integrated card holder adopts a plastic shell.

6. The modular portable power system according to claim 4, characterized in that: The circuit board in the integrated card holder is made by a potting process.

7. The modular portable power system according to claim 1, characterized in that: The AC / DC dual-purpose charger comprises an input interface and an output interface.

8. The modular portable power system according to claim 7, characterized in that: The input interface can realize AC 200V mains power and vehicle-mounted DC input; the output interface includes different interfaces adapted to a variety of devices.

9. The modular portable power system according to claim 8, characterized in that: The various devices include a battery box, an information terminal, a digital control watch, a communication terminal or a storage battery.

10. The modular portable power system according to claim 7, characterized in that: The input interface adopts a DC input socket JX-DC-4KZ and an AC input socket JX-AC-3JT, and the output interface adopts a 9-core socket compatible with the battery box.

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