Battery box and battery box module structure

Abstract

The utility model belongs to the technical field of field power supply, and relates to a battery box and a battery box module structure, the battery box is internally provided with a storage battery pack, and the storage battery pack is charged / discharged through a first constant-current constant-voltage power supply module via a first interface; the first constant-current constant-voltage power supply module is connected with the PD interface circuit; the control circuit comprises a switch and display circuit, a single-chip microcomputer and a power supply control circuit which are connected in sequence, the single-chip microcomputer is connected with a voltage / current detection circuit and a communication circuit, the power supply control circuit is further connected with a second constant-current constant-voltage power supply module, and the communication circuit is further connected with a clamping seat. The second constant-current and constant-voltage power supply module is connected with the clamping seat and the storage battery pack respectively; and the battery cell anti-reverse protection circuit is used for realizing anti-reverse protection on the storage battery pack. According to the battery box, the existing'one charging, one charging and one interface 'is optimized into'one charging, multiple charging, multiple power and multiple interfaces', and the high specific energy index requirement of the battery is realized through the lightweight design of the battery box.

Description

TECHNICAL FIELD

[0001] The utility model belongs to field power supply technical field relates to a battery box and battery box module structure. BACKGROUND

[0002] At present, the camping team power supply mainly relies on the team to carry the power supply, and the power supply guarantee mode is single, especially cannot supplement the electric quantity again, which leads to that its use is limited. Moreover, the existing team to carry the power supply mainly adopts the integral integrated structure, although the structure is compact, but the carrying maintenance detection needs to be disassembled, and the technical requirement of the maintenance personnel is high, which is not suitable for the convenience principle of field environment.

[0003] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0004] The utility model discloses a battery box and battery box module structure, which can realize photovoltaic, vehicle charging (such as automobile battery) and 220V charging. The battery box module structure adopts a modularization, which can be directly detected and replaced in a plug-in mode, and is beneficial to the convenient maintenance and rapid guarantee in a field environment.

[0005] To achieve the above object, the utility model provides the following technical scheme.

[0006] A battery box is internally provided with:

[0007] A battery pack is charged / discharged through a first interface by a first constant-current constant-voltage power module. The first constant-current constant-voltage power module is connected with a PD interface circuit.

[0008] A 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 connected with a voltage / current detection circuit and a communication circuit. The power control circuit is further connected with a second constant-current constant-voltage power module. The communication circuit is further connected with a card seat. The second constant-current constant-voltage power module is connected with the card seat and a battery pack to be charged.

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

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

[0011] Specifically, the first interface is exposed on one end of the battery box shell.

[0012] Specifically, one end of the battery box shell is also provided with a second interface exposed.

[0013] Specifically, the battery box is also connected with a card seat connected with a communication circuit, and the battery box charges the battery pack to be charged through the second constant-current constant-voltage power supply module through the card seat.

[0014] Specifically, the other end of the battery box shell is provided with a connecting portion for connecting with another battery box.

[0015] Specifically, the battery box comprises a matched shell and a cover plate, the shell is made of plastic, which is beneficial to insulation and weight reduction, and the cover plate is made of metal, which is beneficial to deformation suppression and strength improvement.

[0016] Specifically, when the battery pack needs to be charged, any one of a photovoltaic assembly, commercial power, a hand-cranking generator or an automobile storage battery is connected.

[0017] Specifically, the photovoltaic assembly is a flexible thin film folding assembly.

[0018] Specifically, the flexible thin film folding assembly comprises, from top to bottom, an ETFE film, POE glue, a solar power generation plate, a support plate, POE glue and a high-strength camouflage cloth.

[0019] In addition, the utility model also provides a battery box module structure which is composed of a plurality of battery boxes which are detachably connected, the battery box is the battery box as above or all of the battery boxes, and the plurality of battery boxes are connected in series.

[0020] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

[0021] The PD interface circuit charges the battery box through the first interface, or discharges the equipment containing the PD protocol such as a mobile phone through the battery box, and the charging power and voltage meet the requirements of the PD protocol; the control circuit can control the on-off of the battery box, and through real-time monitoring of the relevant data fed back by the voltage / current detection circuit, the battery pack can be effectively protected in a safe working state; a plurality of channels are integrated in the card seat, which can simultaneously charge a plurality of batteries or supply power to the equipment, and the detection circuit in the card seat can collect the detected voltage, current and other information to the single-chip microcomputer, the single-chip microcomputer adjusts the voltage or current according to the set charging and output conditions, realizes output management, and displays the working state of the card seat through the display circuit, realizes man-machine interaction.

[0022] The battery box provided by the utility model optimizes the existing "one charging, one battery, one interface" to "one charging, multiple batteries, multiple interfaces", the lightweight design (the shell is made of plastic, and the cover plate is made of metal) of the battery box realizes the high specific energy index requirement of the battery, the single battery can realize a capacity greater than 3Ah, and has the function of not completely losing the system power supply after the partial damage of the battery core. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings incorporated into the specification and forming a part thereof, together with the specification, serve to explain the principles of the utility model.

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, other drawings can be obtained by those skilled in the art without creative labor under the premise of not paying the creative labor.

[0025] Figure 1 The structural diagram of the battery box provided by the utility model is shown in the figure.

[0026] Figure 2 The working principle block diagram of the battery box provided by the utility model is shown in the figure.

[0027] Figure 3 The structural diagram of the cell anti-reverse protection circuit in the utility model is shown in the figure.

[0028] Figure 4 The principle block diagram of the voltage / current detection circuit provided by the utility model is shown in the figure.

[0029] Figure 5 The principle block diagram of the power supply control circuit provided by the utility model is shown in the figure.

[0030] Figure 6 The principle block diagram of the PD interface circuit provided by the utility model is shown in the figure.

[0031] Figure 7 The structural schematic diagram of the flexible film folding assembly provided by the utility model is shown in the figure.

[0032] Figure 8 The structural diagram of the battery box module provided by the utility model is shown in the figure. DETAILED DESCRIPTION

[0033] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is presented in connection with the drawings, wherein the same numbers on different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments are not meant to represent all implementations consistent with the present application. Rather, they are merely examples with which those skilled in the art can understand some aspects of the present application detailed in the claims appended hereto.

[0034] In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] Embodiment 1

[0036] Referring to Figures 1-8 , the present embodiment provides a battery box, which is divided into two main and auxiliary battery boxes, can be used independently, and can be used in combination through a connecting part (plug-in part), and is internally provided with:

[0037] a storage battery, which is charged / discharged through a first interface by a first constant-current constant-voltage power module; the first constant-current constant-voltage power module is connected with a PD interface circuit;

[0038] a control circuit, which comprises a switch and display circuit, a single-chip microcomputer, and a power control circuit connected in sequence, the single-chip microcomputer is connected with a voltage / current detection circuit and a communication circuit respectively, and the power control circuit is further connected with a second constant-current constant-voltage power module;

[0039] a cell anti-reverse protection circuit for achieving anti-reverse protection of the storage battery.

[0040] Specifically, a plurality of accommodating cavities for mounting the storage battery are reserved in the battery box, a plurality of batteries are mounted in parallel in each accommodating cavity, and the storage batteries in adjacent accommodating cavities are connected in series. Optionally, in the present embodiment, three accommodating cavities are reserved in each battery box, two batteries are mounted in parallel in each accommodating cavity, i.e. six batteries can be filled in each battery box, each battery can be independently disassembled and replaced, a form of 3 series 2 parallel is adopted, and the function of not completely losing system power supply after partial damage of the cell is provided, and the battery box structure is shown in Figure 1 .

[0041] Specifically, according to the battery box function requirements, the battery box adopts a filling type structure, and is internally provided with a PD interface circuit, a control circuit, a voltage / current detection circuit and a cell anti-reverse protection circuit. The PD interface circuit is used to complete charging of the six built-in batteries and adapt the PD protocol output; the control circuit is used to control the switch, adaptive output and power indication of the battery box, and the adaptive output can be connected to the battery box through the card seat to complete the charging management; the cell anti-reverse protection circuit protects the battery box. The working principle block diagram of the battery box is shown in Figure 2 .

[0042] Among them, ① the cell anti-reverse protection circuit can ensure that the cell is not damaged when the cell is reversely connected, and the working principle block diagram of the cell anti-reverse protection circuit is shown in Figure 3 . The cell anti-reverse protection circuit adopts a hardware switch to realize anti-reverse protection. Taking the B1 group battery as an example, when the battery is normally installed, Q1 and Q7 are turned on, Q4 and Q10 are turned on, and the negative electrode is turned on; when the battery is reversely installed, Q1 and Q7 are disconnected, Q4 and Q10 are turned off, and the negative electrode is not turned on, thereby realizing the reverse installation protection function. ② The voltage / current detection circuit is used to detect the voltage, current and temperature data of the battery, and control the charging or discharging action of the battery according to the above data information. The principle block diagram is shown in Figure 4 . ③ The control circuit is used to control the on-off of the system, and adopts a soft switch form. The switch is not directly controlled to be turned on or turned off, and a software detection form is adopted. After the key SW1 is pressed, the single-chip microcomputer detects that Switch_PA8 is pulled low, and Q24 is turned on. Before the key is released, Q24 is always kept turned on. During this period, the single-chip microcomputer pin MPC_PA7 is high, and Q24 is kept turned on. After the key is released, the switch loop can also be kept turned on. If shutdown is required, the key is operated again. The single-chip microcomputer determines the content to be executed by detecting the time when the Switch_PA8 pin is pulled low. The working principle block diagram is shown in Figure 5 . ④ The PD interface circuit is used to charge the battery box through the first interface (Type-C interface), or discharge the device containing the PD protocol such as a mobile phone through the battery box. The charging power and voltage meet the requirements of the PD3.0 protocol. The principle block diagram is shown in Figure 6 .

[0043] It should be noted that in the present embodiment, the battery box is combined with the hardware structure of the battery box, and the built-in software of the battery box includes battery protection, switch control and intelligent charging management. The battery protection adopts a mature software scheme, including temperature, voltage and current detection, and the current power and working state are calculated by integrating the above data; the switch control determines the on-off state of the switch by detecting the duration of the key being pressed; the intelligent charging management software adjusts the output voltage and current according to the battery information built in the interface by identifying the connected interface, charges the connected battery pack and displays the charging state. The above software runs on the STC8G2K64S4-36I-LQFP48 single-chip microcomputer through the keil development environment.

[0044] Specifically, the first interface is exposed at one end of the battery box shell, and the one end of the battery box shell is also exposed with a second interface opposite to the first interface. According to the functional requirements of the battery box, the first interface is selected as a Type-C interface, a No. 0 connector is selected, a 9-core socket is selected to meet the power demand, the interface is close to one end, and the large surface is provided with a power display.

[0045] Specifically, the other end of the battery box shell is provided with a connecting part for connecting with another battery box.

[0046] Further, the battery box is also connected with a card seat connected with a communication circuit, and the battery box charges the battery pack to be charged through the second constant-current constant-voltage power supply module through the card seat.

[0047] Specifically, the battery box comprises a matched shell and a cover plate, according to the functional and hardware design requirements of the battery box, the shell is made of plastic parts, which is beneficial to insulation and weight reduction, and the cover plate is made of metal, which is beneficial to suppress deformation and improve strength, and the overall size can be reduced without reducing the strength.

[0048] Further, the battery box has filling requirements, and the battery box adopts a spring + contact piece mode, wherein the spring is used for the positive electrode and the contact piece is used for the negative electrode, which can ensure that the user does not damage the positive electrode of the plastic package of the battery core when filling the battery. Specifically, the battery box filling size is designed around the 18650 battery, and the size of the battery box is 175mm (length) x 78mm (width) x 28mm (thickness), which can be matched with a spring clip. The battery box adopts a non-metal shell to realize lightweight, and the total weight of each battery box filled with 6 batteries is about 0.45 kilograms.

[0049] Specifically, when the battery pack needs to be charged, any one of photovoltaic components, mains, hand-cranked generators or car batteries is connected.

[0050] It should be noted that the photovoltaic component mainly comprises a solar panel, a junction box, a cascade cable, an output cable and a fixed head cloth. The solar panel selects single crystal silicon material as the power generation chip material, which is pressed with multiple layers of flexible auxiliary materials to form a light and portable flexible thin film folding component. The outlet part selects an IP55 waterproof split junction box, which is connected in series and parallel through a cascade cable, and supplies power to external equipment through an output cable. The built-in photovoltaic controller in the cascade module supplies power to external loads, and multiple components are connected in series and parallel through the built-in cascade circuit in the cascade module to realize high-power power output.

[0051] Specifically, the photovoltaic component is a flexible thin film folding component.

[0052] Specifically, the flexible film folding assembly includes, from top to bottom, an ETFE film, POE glue, a solar power panel, a support plate, POE glue, and a high-strength camouflage cloth. The surface of the assembly is packaged with a high-transmittance fluorine-containing ETFE film surface packaging material; the support plate is made of lightweight high-strength aviation aluminum magnesium alloy 7075 aluminum alloy; POE film is used as an adhesive instead of traditional EVA film; the camouflage cloth is used as the outer frame and back material of the assembly, as shown in Figure 7 Further preferably, the flexible film folding assembly is provided with a metal hanging hole at the edge, facilitating the fixing of the assembly to a backpack, tent, etc.; the flexible film folding assembly is provided with a sealed waterproof multifunctional junction box; the flexible film folding assembly is provided with an eyelet at the corner, and the cascading assemblies are fixed by a belt. The photovoltaic panel is designed in a three-stage folding structure, which divides a 50W assembly into six parts, with a 20mm spacing between the chips and a 15mm distance between the chips and the edge. The edge is provided with a head cloth, and is provided with a junction box, a cascading cable, and an output cable, which can achieve the function of cascading output of the same type of assembly, and is convenient to carry and reliable to deploy and retract.

[0053] In addition, the utility model provides a battery box module structure, see Figure 8 A plurality of battery boxes are detachably connected, the battery box is the battery box as above or all of the battery boxes, and the plurality of battery boxes are connected in series.

[0054] Embodiment 2

[0055] On the basis of embodiment 1, the difference between embodiment 1 and embodiment 2 is that the battery box in the embodiment adopts a 6-series 2-parallel form, and the battery box comprises a battery pack, a charge and discharge protection circuit, an electric quantity detection and display module, a power switch, an output adaptation circuit, a connecting cable and the like. Among them, the battery pack is composed of 12 electric cores, when the electric core and other structural materials are put into the shell, a certain pre-tightening force needs to be applied, and the specific assembly process is as follows:

[0056] ①Electric core: respectively take out the qualified secondary electric core and the corresponding auxiliary material. Observe whether the surface of the electric core is damaged or scratched; observe whether the size of the rigid flame-retardant sheet, the buffer foam and the surface is damaged or scratched. If there is a problem, record the scrap and replace the electric core and auxiliary material meeting the requirements. If there is no problem, then proceed to the next step.

[0057] ②Pretreatment: all the electric cores are subjected to insulation treatment, and the insulation polyimide adhesive tape is attached to the side of the battery and the connection between the tab and the electric core. The 12 electric cores and auxiliary materials are divided into two parts, 6 electric cores in each part.

[0058] ③ Laser welding: the 6 cell tabs are connected in series, and the laser welding is used to weld the tabs on the connecting copper bar (under the condition of 150N tension, the tab welding point is continuous, and it is considered qualified), and finally the total positive and negative interfaces of the battery pack are led out.

[0059] ④ Welding line interface: welding voltage collection lines on the battery pack total positive, total negative and connecting copper bar for voltage collection, and welding the collection lines to different circuit slave interfaces according to the order of single battery, then welding the communication connector to the power management single chip interface to read the battery temperature, voltage and other information. The battery pack total positive line is connected with the relay. The signal line of the relay is welded to the power management interface, and the welding point is continuous under the condition of 150N tension, which is considered qualified.

[0060] ⑤ Insulation treatment: paste insulation glue at the cell tab, cover high temperature insulation glue at the welding point, paste insulation tape and insulation plate on the connecting piece and connecting plate for insulation, and fix and insulate the tab, connecting piece and connecting plate.

[0061] ⑥ Into the shell (key process): put the above-mentioned series module into the shell, and use self-made pressurizing device for pressurizing. In this process, the pressure sensor is used to monitor the pressure of the battery module throughout the process.

[0062] ⑦ Fixing: use screws to fix the load-bearing parts of the power supply system, and use glue and screws to fix the circuit board on the module.

[0063] ⑧ Weight detection: use electronic scale to weigh the power supply product, and the battery pack weight is less than or equal to 2.2kg, which is considered qualified.

[0064] ⑨ Performance detection: use Arbin battery tester to test the performance of the power supply system. In the final product, the battery pack can discharge 0.5kWh of electricity, which is considered qualified.

[0065] The above battery box, the display function integration includes: charge and discharge protection circuit, power detection and display module, power switch, output adaptation circuit, connecting cable and other components, which are mainly realized through control circuit.

[0066] The control circuit adjusts the DC-DC output voltage and current according to the model of the accessed charging battery, opens the switch circuit to realize the power supply output to the power consumption equipment after the adjustment is completed after the power parameter information is obtained. The charge and discharge protection circuit (voltage / current monitoring circuit) is used for monitoring the voltage, current and temperature of the battery cell, and protecting the battery in a safe working state. The protection board adopts a domestic analog front end + low power consumption 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 for converting the vehicle-mounted direct-current power supply into a power supply output or a charging power supply, and the output of the DC-DC power supply is adjusted by the control circuit to adapt to various interfaces. The DC-DC power supply circuit adopts a 4-switch MOS controlled power supply circuit, adopts a constant current and constant voltage control mode, the voltage and current size are controlled and adjustable, adopts an SC8701 power chip of Nanjing Chip, the input voltage range meets 10V-40V, the output meets 5V-28V working voltage, and the voltage and current can be adjusted in real time according to the IPWM pin.

[0067] The above only is the specific implementation manner of the present application, so that the person skilled in the art can understand or realize the present application. 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 application.

[0068] It should be understood that the present application is not limited to the above described and that various modifications and changes can be made without departing from the scope thereof. The scope of the present application is limited only by the claims appended hereto.

Claims

1. A battery case characterized by comprising: The battery box is internally provided with: A battery pack, which is charged / discharged through a first interface by a first constant-current constant-voltage power module; the first constant-current constant-voltage power module is connected with a PD interface circuit; A control circuit, which comprises a switch and display circuit, a single-chip microcomputer, and a power control circuit connected in sequence; the single-chip microcomputer is connected with a voltage / current detection circuit and a communication circuit; the power control circuit is further connected with a second constant-current constant-voltage power module; A cell anti-reverse protection circuit for achieving anti-reverse protection of the battery pack.

2. The battery case according to claim 1, wherein A plurality of accommodating cavities for mounting the battery pack are reserved in the battery box; a plurality of batteries are mounted in parallel in each accommodating cavity; and the battery packs in adjacent accommodating cavities are connected in series.

3. The battery case of claim 1, wherein, The first interface is exposed on one end of the shell; and a second interface is also exposed on one end of the shell and oppositely arranged with the first interface.

4. The battery pack of claim 3, wherein, The other end of the shell is provided with a connecting portion for connecting with another battery box.

5. The battery pack of claim 1, wherein, The battery box is further connected with a card seat, which is connected with the communication circuit; and the battery box charges the battery pack to be charged through the second constant-current constant-voltage power module via the card seat.

6. The battery pack of claim 1, wherein, The battery box further comprises a cover plate matched with the shell; the shell is made of plastic; and the cover plate is made of metal.

7. The battery pack of claim 1, wherein, When the battery pack needs to be charged, any one of a photovoltaic assembly, commercial power, a hand-cranked generator, and an automobile storage battery is connected as a power source.

8. The battery pack of claim 7, wherein, The photovoltaic assembly is a flexible thin film folding assembly.

9. The battery pack of claim 8, wherein, The flexible thin film folding assembly comprises, from top to bottom, an ETFE film, POE glue, a solar power generation panel, a support plate, POE glue, and a high-strength camouflage cloth.

10. A battery cassette module structure, characterized by comprising: A plurality of battery boxes are detachably connected, wherein the battery boxes are the battery boxes according to any one of claims 1-9, and the plurality of battery boxes are connected in series. A plurality of battery boxes are detachably connected, wherein the battery boxes are the battery boxes according to any one of claims 1-9, and the plurality of battery boxes are connected in series.

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