Single cell boosting battery pack

Abstract

The utility model provides a single battery cell boosting battery pack. The single battery cell boosting battery pack comprises a shell, and a bracket base, single battery cells, a bracket top cover and an inverse control plate which are assembled in the shell, the bracket top cover is assembled with the bracket base; the bracket base comprises a mounting cavity, and the mounting cavity is used for placing a single battery cell; the bracket top cover is arranged on the mounting cavity in a covering manner, and the single battery cells are fixed in the mounting cavity; a first through groove is formed in the middle of the bottom of the support base and communicates with the mounting cavity. A second through groove is formed in the middle of the support top cover. Two connecting sheets are welded on each single battery cell, and the single battery cells are electrically connected with the inverse control board through the two connecting sheets; the inverse control plate is fixed on the end face of the support top cover, and the end face deviates from the mounting cavity; the support top cover is provided with two open holes corresponding to the two connecting pieces, and the connecting pieces penetrate through the open holes to be connected with the inverse control board. The inverse control board comprises a multi-phase staggered boost-buck circuit, the circuit is composed of a plurality of boost-buck circuit units, and each unit comprises a switch tube; the plurality of switch tubes are alternately turned on and off with phase differences.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a single-cell boost battery pack. Background Technology

[0002] Currently, green, low-carbon, and sustainable development have become a global consensus. Looking at the sources of global carbon emissions, the main contributors are the power and transportation sectors, which rely on traditional fossil fuels. Therefore, continuously promoting carbon emission reduction in the power and transportation industries has become a crucial means of achieving carbon neutrality. The main way to reduce carbon emissions in the power industry is to increase the proportion of renewable energy generation such as wind and solar power; the main way to reduce carbon emissions in the transportation industry is to increase the electrification level of transportation vehicles. Lithium-ion batteries, as an important carrier of electrochemical energy, are becoming increasingly important. Based on application scenarios, lithium-ion batteries can be divided into several fields, including power lithium-ion batteries, energy storage lithium-ion batteries, and consumer and small power lithium-ion batteries.

[0003] However, traditional multi-cell battery packs require more cells, at least two or more individual cells to form a module to match different voltage levels of power supplies and loads. This increases the size and weight of the battery pack, affecting space layout and energy efficiency. The assembly process requires connecting components to ensure the tightness between individual cells and the battery management system (BMS) components, increasing manufacturing costs and making the production process relatively complex and cumbersome. In multi-cell battery packs, differences in capacity, internal resistance, and charge / discharge characteristics among individual cells lead to decreased consistency within the battery pack. The more individual cells there are, the worse the consistency becomes, and welding between individual cells can also lead to problems such as poor soldering, desoldering, and overheating, thus affecting the overall performance and lifespan of the battery pack. Furthermore, during the charging and discharging process of multi-cell battery packs, the mutual influence between cells poses safety risks such as overcharging, over-discharging, and thermal runaway. If even one individual cell malfunctions, the entire battery pack becomes unusable, easily leading to resource waste. Utility Model Content

[0004] The present invention aims to solve the problems existing in the prior art and provide a single-cell boost battery pack to achieve simplification, cost reduction, performance improvement and safety enhancement of the battery system.

[0005] To solve the above-mentioned technical problems, this utility model provides a single-cell boost battery pack, including an outer shell and a bracket base, a single cell, a bracket top cover and a reverse control board assembled inside the shell;

[0006] The bracket top cover is assembled with the bracket base; the bracket base includes a mounting cavity for placing the individual battery cell; the bracket top cover is placed on the mounting cavity and fixes the individual battery cell inside the mounting cavity.

[0007] A first through groove is formed in the middle of the bottom of the bracket base, and the first through groove communicates with the mounting cavity; a second through groove is formed in the middle of the top cover of the bracket;

[0008] The individual battery cell is welded with two connecting pieces, and is electrically connected to the reverse control board through the two connecting pieces; the reverse control board is fixed to the end face of the bracket top cover, which faces away from the mounting cavity; the bracket top cover is provided with two openings corresponding to the two connecting pieces, and the connecting pieces pass through the openings to connect to the reverse control board;

[0009] The reverse control board includes a multi-phase interleaved buck-boost circuit, which consists of multiple buck-boost circuit units, each of which contains a switching transistor; the multiple switching transistors alternately turn on and off with a phase difference to achieve interleaved control.

[0010] In a preferred embodiment, the bracket base and the bracket top cover are made of plastic; the bracket base supports the individual battery cell and the bracket top cover clamps the individual battery cell.

[0011] In a preferred embodiment, the bracket base is provided with a first buckle and a plurality of first mounting holes along its edge, and the bracket top cover is provided with a second buckle and a plurality of second mounting holes along its edge.

[0012] The first buckle and the first mounting hole are respectively provided with the second buckle and the second mounting hole; during assembly, the first buckle and the second buckle are fastened to each other, and the first mounting hole and the second mounting hole are fixed by screws;

[0013] The top cover of the bracket is provided with studs for fixing the reverse control board.

[0014] In a preferred embodiment, reinforcing ribs are provided on the outer side of the bracket base and the end face of the bracket top cover; support columns are provided on the bottom of the bracket base and the end face of the bracket top cover.

[0015] In a preferred embodiment, the reinforcing ribs are provided on two of the four outer sides of the support base, and fixing ears are provided on both sides;

[0016] The reinforcing ribs and fixing ears are respectively arranged on opposite sides of the bracket base; the fixing ears are used to connect and fix to the outer shell.

[0017] In a preferred embodiment, two placement slots are provided on the side wall of the mounting cavity, the two placement slots corresponding to the two connecting pieces; the placement slots are used to place the connecting pieces and provide space for the connecting pieces to move.

[0018] In a preferred embodiment, the single battery cell includes a battery cell body, a battery cell positive electrode, a battery cell negative electrode, and an exhaust valve, wherein one of the two connecting pieces is connected to the battery cell positive electrode, and the other is connected to the battery cell negative electrode;

[0019] The inverter board includes a positive power input terminal, a negative power input terminal, a positive power output terminal, a negative power output terminal, and a heat sink; the heat sink is used for heat dissipation of the inverter board.

[0020] The positive terminal of the power input is connected to the positive terminal of the battery cell through one of the connecting pieces; the negative terminal of the power input is connected to the negative terminal of the battery cell through the other connecting piece.

[0021] In a preferred embodiment, the bottom of the bracket base is provided with an exhaust hole, which communicates with the mounting cavity.

[0022] In a preferred embodiment, the outer casing is provided with two terminals, positive and negative, for powering external devices;

[0023] The positive and negative terminals of the power output are connected to the corresponding positive and negative terminals via a power line.

[0024] In a preferred embodiment, the reverse control board adjusts the on-time of the switching transistor by pulse width modulation (PWM) control.

[0025] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0026] 1. By employing individual battery cells and a specially designed plastic support frame, the problem of large size, heavy weight, poor consistency, and low safety inherent in traditional multi-string battery packs is effectively solved. A customized reverse control board enables efficient voltage boosting of individual battery cells, meeting the needs of various application scenarios. Its assembly process is simple, requiring no complex tools, thus reducing production and labor costs.

[0027] 2. Improved Economic Efficiency: By using individual battery cells, the number of cells and related components is reduced, lowering the overall cost of the battery system and enhancing the product's market competitiveness. Simultaneously, battery consistency is improved, battery life is extended, reducing battery replacement frequency and maintenance workload, thus lowering maintenance costs during use. The output voltage of the battery pack can be increased without increasing the number of cells connected in series, meeting the high-voltage, high-power requirements of electric vehicles, while also contributing to the lightweighting and miniaturization of the battery pack.

[0028] 3. Improved Technical Performance: By using individual battery cells, the number of cells connected in series is reduced, mitigating problems caused by cell inconsistencies and improving the stability and reliability of the battery system. Efficient power management technology enables more precise and flexible circuit control, allowing high-performance power devices to operate at high frequencies, reducing the size and weight of the boost circuit, and improving conversion efficiency. The use of pulse width modulation (PWM) allows for real-time monitoring and adjustment of the boost circuit's output voltage and current, ensuring the stability and reliability of the boost process. It also provides overvoltage, overcurrent, and overheat protection functions, enhancing system safety.

[0029] 4. Improved Environmental Benefits: The customized inverter board employs a multi-phase interleaved buck-boost circuit, extending battery life, reducing the generation of waste batteries, and lowering environmental pollution. Reducing the number of battery cells used means less demand for raw materials (such as lithium, cobalt, and nickel), helping to conserve limited resources, achieve more efficient resource utilization, and promote sustainable development. Attached Figure Description

[0030] Figure 1 This is an exploded view of the single-cell boost module structure in a preferred embodiment of the present invention;

[0031] Figure 2 This is an overall view of the single-cell boost module structure in a preferred embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the mounting cavity provided in the bracket base of the preferred embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the bottom structure of the support base in a preferred embodiment of the present invention;

[0034] Figure 5 This is a structural diagram of a single battery cell in a preferred embodiment of the present invention;

[0035] Figure 6 This is a structural diagram of the bracket top cover in a preferred embodiment of the present invention;

[0036] Figure 7 This is a front view of the reverse control board in a preferred embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the back of the reverse control board in a preferred embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the overall structure of the outer shell assembly in a preferred embodiment of the present utility model;

[0039] Figure 10This is a cross-sectional view of the interior of the outer shell in a preferred embodiment of the present invention;

[0040] Figure 11 This is a diagram of a three-phase interleaved step-up / step-down circuit in a preferred embodiment of the present invention.

[0041] Figure 12 This is a circuit diagram of a three-phase interleaved buck-boost circuit in a preferred embodiment of the present invention.

[0042] Explanation of reference numerals in the attached drawings: 1. Outer shell; 11. Positive terminal; 12. Negative terminal; 2. Bracket base; 21. Mounting cavity; 22. First through slot; 23. First snap-fit; 24. First assembly hole; 25. Placement slot; 26. Fixing ear; 27. Vent hole; 3. Individual battery cell; 31. Overall positive connection piece; 32. Overall negative connection piece; 33. Battery cell body; 34. Battery cell positive terminal; 35. Battery cell negative terminal; 36. Vent valve; 4. Bracket top cover; 41. Second through slot; 42. Opening; 43. Second snap-fit; 44. Second assembly hole; 45. Stud; 5. Reverse control board; 51. Power input positive terminal; 52. Power input negative terminal; 53. Power output positive terminal; 54. Power output negative terminal; 55. Heat sink; 56. Inductor; 57. Switching transistor; 6. Reinforcing rib; 7. Support column. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0044] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] refer to Figures 1-12 This embodiment provides a single-cell 3 boost battery pack, including an outer casing 1 and a bracket base 2, a single-cell 3, a bracket top cover 4, and a reverse control board 5 assembled inside the casing. The bracket base 2, the single-cell 3, the bracket top cover 4, and the reverse control board 5 constitute a single-cell 3 boost module structure (e.g., Figure 1-2 ).

[0047] The bracket top cover 4 is assembled with the bracket base 2; the bracket base 2 includes a mounting cavity 21 (e.g., ...). Figure 3 The mounting cavity 21 is used to place the individual battery cell 3; the bracket top cover 4 covers the mounting cavity 21 and fixes the individual battery cell 3 inside the mounting cavity 21. The bracket base 2 and the bracket top cover 4 are made of plastic. The bracket base 2 serves as a bracket for the individual battery cell 3 and is also a supporting component inside the entire battery pack. The individual battery cell 3 is supported by the interior of the bracket base 2 and clamped by the bracket top cover 4. As the core component of energy storage, the individual battery cell 3 will expand during long-term charging and discharging due to its characteristics, which will reduce the life of the cell. Therefore, the bracket base 2 and the bracket top cover 4 work together to act as an end plate clamp, controlling the expansion ratio of the individual battery cell 3, thereby extending its life.

[0048] Based on the characteristic that cell expansion mainly occurs at the center, a first through groove 22 is formed in the middle of the bottom of the support base 2 (e.g., Figure 4 The first through groove 22 connects to the mounting cavity 21; a second through groove 41 is opened in the middle of the bracket top cover 4 (e.g. Figure 6 The hollow slot design between the bracket base 2 and the bracket top cover 4 provides space for the expansion of the battery cell, so that when the battery cell expands, there will not be a large force that causes the bracket to deform over a large area and make the product bulge.

[0049] The individual battery cell 3 is welded with two connecting pieces, namely a total positive connecting piece 31 and a total negative connecting piece 32 (e.g., ...). Figure 5The main positive connecting piece 31 and the main negative connecting piece 32 are electrically connected to the positive power input terminal 51 and the negative power input terminal 52 of the reverse control board 5. The reverse control board 5 is fixed to the end face of the bracket top cover 4, which faces away from the mounting cavity 21; the bracket top cover 4 is provided with two openings 42 corresponding to the two connecting pieces, and the connecting pieces pass through the openings 42 to connect to the reverse control board 5.

[0050] The assembly structure is such that the bracket base 2 has a first buckle 23 and a plurality of first assembly holes 24 along its edge (e.g., ...). Figure 3 The bracket top cover 4 is provided with a second buckle 43 and several second mounting holes 44 along its edge (e.g., ...). Figure 6 The first buckle 23 and the first mounting hole 24 are respectively provided with the second buckle 43 and the second mounting hole 44; during assembly, the first buckle 23 and the second buckle 43 are fastened to each other, and the first mounting hole 24 and the second mounting hole 44 are connected and fixed by screws; a stud 45 is provided on the end face of the bracket top cover 4, and the stud 45 and the screw are used to fix the reverse control plate 5.

[0051] Two placement slots 25 are provided on the side wall of the mounting cavity 21 (e.g., Figure 3 The two placement slots 25 correspond to the two connecting pieces; the placement slots 25 are used to place the connecting pieces and provide space for the connecting pieces to move.

[0052] The bracket base 2 and bracket top cover 4 are positioned and assembled using the first snap-fit ​​23 and the second snap-fit ​​43. Once assembled, the bracket base 2, individual battery cell 3, and bracket top cover 4 form a single unit. The individual battery cell 3 uses the main positive connecting piece 31 and the main negative connecting piece 32 to pass through the opening 42. Then, the reverse control board 5 is fixed to the bracket top cover 4 with screws. The main positive connecting piece 31 and the main negative connecting piece 32 are aligned with the positive and negative power input terminals 51 and 52 of the reverse control board 5. Finally, it is fixed with screws through the first mounting hole 24 and the second mounting hole 44. This design is simple to assemble, convenient to install, requires minimal tools, and greatly reduces installation costs and labor costs.

[0053] To enhance the strength of the support base 2 and the support top cover 4, reinforcing ribs 6 are provided on the outer side of the support base 2 and the end face of the support top cover 4. The first assembly holes 24 provided around the upper edge of the support base 2, together with the reinforcing ribs 6 on the side of the support base 2, further strengthen the overall structure of the support base 2 and prevent the product from breaking when it falls.

[0054] like Figure 5The single battery cell 3 includes a cell body 33, a positive electrode 34, a negative electrode 35, and an exhaust valve 36. A general positive connection piece 31 connects to the positive electrode 34, and a general negative connection piece 32 connects to the negative electrode 35, facilitating connection to the reverse control board 5. Figure 7-8 The inverter board 5 includes a power input positive terminal 51, a power input negative terminal 52, a power output positive terminal 53, a power output negative terminal 54, and a heat sink 55. The heat sink 55 is used for heat dissipation of the inverter board 5 (mainly for heat dissipation of the inductor 56 and the switching transistor 57 (MOS)). The power input positive terminal 51 is connected to the positive terminal 34 of the battery cell through the general positive connection piece 31. The power input negative terminal 52 is connected to the negative terminal 35 of the battery cell through the general negative connection piece 32, so that the inverter board 5 can be connected to the individual battery cell 3 for charging and discharging.

[0055] like Figure 9 The outer casing 1 is provided with a positive terminal 11 and a negative terminal 12 for powering external devices; the positive terminal 53 and the negative terminal 54 of the power output are connected to the corresponding positive terminal 11 and negative terminal 12 through power lines to output power.

[0056] After the bracket base 2, the individual battery cell 3, the bracket top cover 4, and the reverse control board 5 are assembled into a single structure, this single structure is then fitted into the outer casing 1. On the four outer sides of the bracket base 2, reinforcing ribs 6 are provided on two sides, and fixing ears 26 are provided on both sides; the reinforcing ribs 6 and fixing ears 26 are respectively located on opposite sides of the bracket base 2; as shown... Figure 10 The fixing lug 26 is used to connect and fix to the outer shell 1, and is secured to the inner wall of the outer shell 1 by screws. Support columns 7 are provided on the bottom of the support base 2 and the end face of the support top cover 4. The support columns 7 support the overall structure, preventing large-scale vibration and displacement due to drops, thus enhancing stability.

[0057] The support column 7 and the fixing ear 26 are designed to fix and support the product casing during assembly to prevent internal loosening. The bottom of the bracket base 2 is provided with a vent 27, which connects to the mounting cavity 21. The vent 27 is used to allow gas to escape from below when the vent valve 36 on the individual battery cell 3 ruptures, preventing explosion.

[0058] In this embodiment, the main function of the reverse control board 5 is to boost the voltage of the individual battery cell 3 to the required power. The reverse control board 5 includes a multi-phase interleaved buck-boost circuit, which consists of multiple buck-boost circuit units, each of which contains a switching transistor 57; the multiple switching transistors 57 alternately turn on and off with a phase difference to achieve interleaved control.

[0059] The main function of the inverter board 5 is to boost the voltage of the single-cell battery to the required voltage, and at the same time, to reduce the voltage of the single-cell battery from an external high voltage. It adopts efficient power management technology, combining the advantages of interleaved control and buck-boost topology. Through its multi-phase structure and interleaved control, the inverter board 5 significantly reduces current ripple, improves efficiency and power density, and is suitable for applications with wide input voltage ranges and high efficiency requirements.

[0060] In this embodiment, the inverter board 5 uses a three-phase interleaved buck-boost circuit. By interleaving the three phases, it reduces input and output current ripple, improves system efficiency and power density, and is widely used in applications requiring a wide input voltage range and high efficiency. The three-phase interleaved buck-boost circuit consists of three basic buck-boost circuit units connected in parallel. Each unit includes:

[0061] Switch 57 (MOSFET or IGBT): Used to control energy flow.

[0062] Inductor 56: Stores and transfers energy.

[0063] Freewheeling switch: Provides a unidirectional current path. In traditional circuits, the freewheeling switch has a certain forward conduction voltage drop, which will generate power loss. Here, we use a 57-type switch (MOSFET or IGBT), which will be referred to as the freewheeling switch 57 below.

[0064] Capacitors: used for filtering and stabilizing output voltage.

[0065] The three phases are interleaved by 120 degrees to reduce input and output current ripple. The core of the three-phase interleaved buck-boost control is to achieve efficient energy conversion by interleaving the three phases. The following is its working principle (e.g.) Figure 11-12 ):

[0066] 1. Boost / Boost Mode:

[0067] When the input voltage is lower than the output voltage, the circuit operates in boost mode.

[0068] During the switching on-phase: Taking one phase as an example, when the main switch 57 of that phase is turned on, the input power supply charges the inductor 56, and the current in the inductor 56 increases linearly, storing energy. At this time, the freewheeling switch 57 is in the off state, and the current path is: positive terminal of the input power supply → main switch 57 → inductor 56 → negative terminal of the input power supply, and the output capacitor supplies power to the load. Since the on-times of the three phase switches 57 are staggered by 120°, at least one phase's inductor 56 is storing energy at any given moment, while the other phases may be in different operating states.

[0069] During the turn-off phase: When the main switch 57 is turned off, the current in inductor 56 cannot change abruptly. Inductor 56 generates an induced electromotive force, the polarity of which causes the freewheeling switch 57 to conduct. At this time, inductor 56 releases its stored energy, which, combined with the input power supply voltage, charges the output capacitor and supplies power to the load. The current path is: inductor 56 → freewheeling switch 57 → output capacitor → load → positive terminal of input power supply → inductor 56. Due to the three-phase interleaved operation, the energy release times of each phase's inductor 56 are staggered, resulting in a smoother output current and reduced output current ripple. Furthermore, by rationally designing the inductor 56 value and switching frequency, it is possible to raise a lower input voltage to the required higher output voltage.

[0070] When the input voltage is higher than the output voltage, the circuit operates in buck mode.

[0071] During the switching conduction phase: When switch 57 is turned on, the input power supply simultaneously supplies power to inductor 56 and the load. The current in inductor 56 increases linearly, and inductor 56 stores energy. At this time, the freewheeling switch is in a reverse bias state and does not conduct. Because the three-phase switches 57 conduct alternately, the ripple of the input current is effectively suppressed.

[0072] During the turn-off phase: When switch 57 is turned off, the current in inductor 56 cannot change abruptly. Inductor 56 generates an induced electromotive force, the polarity of which causes the freewheeling switch to conduct. Inductor 56 supplies power to the load through the freewheeling switch and simultaneously charges the output capacitor, with the inductor current decreasing linearly. Similarly, due to the three-phase interleaved operation, the output current is smoother. By controlling the on-time (duty cycle) of switch 57, a higher input voltage can be reduced to the required lower output voltage.

[0073] 2. When the input voltage is close to the output voltage, the circuit smoothly switches between buck and boost modes.

[0074] 3. Interleaved control:

[0075] Three-phase switching transistors 57 alternately turn on and off with a 120-degree phase difference. The total current ripple is significantly reduced after the current waveforms of each phase are superimposed. Current distribution: The load current is evenly distributed among the three phases, reducing the current stress on individual phases and improving system reliability. Control strategy: PWM (Pulse Width Modulation) control is used to adjust the duty cycle of switching transistor 57 to achieve a stable output voltage. Based on the output voltage feedback signal, the on-time (duty cycle) of the main switching transistor 57 is dynamically adjusted. When the output voltage is lower than the set value, the on-time of the main switching transistor 57 is increased, allowing the inductor 56 to store more energy, thereby increasing the output voltage; when the output voltage is higher than the set value, the on-time of the main switching transistor 57 is decreased, reducing the energy stored in the inductor 56, causing the output voltage to drop, thus achieving stable output voltage control. Current feedback control is added to adjust the duty cycle. By detecting the current in inductor 56, more precise current control and fast dynamic response are achieved, ensuring current balance among the three phases and preventing overload of any phase.

[0076] The inverter board 5 features protection functions: overvoltage, overcurrent, and short-circuit protection circuits are incorporated to improve system reliability. The main advantages of the inverter board 5 are: Low current ripple: Interleaved control significantly reduces input and output current ripple, decreasing the size and cost of filter components. High efficiency: The multi-phase structure reduces switching and conduction losses, improving overall efficiency. High power density: Current sharing and low ripple characteristics allow for the use of smaller inductors and capacitors, increasing power density. Wide input voltage range: The buck-boost topology adapts to a wide range of input voltages, suitable for various application scenarios. Good thermal management: Current sharing reduces thermal stress on individual components, simplifies heat dissipation design, and ensures stable system operation.

[0077] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A single cell boost battery pack, characterized by: The shell comprises a shell body, a support base, a single cell, a support top cover and a reverse control board; The support top cover is assembled with the support base; the support base comprises a mounting cavity for placing the single cell; the support top cover covers the mounting cavity and fixes the single cell in the mounting cavity; A first through groove is formed in the middle of the bottom of the support base and communicates with the mounting cavity; a second through groove is formed in the middle of the support top cover; The single cell is welded with two connecting plates and is electrically connected with the reverse control board through the two connecting plates; the reverse control board is fixed on the end face of the support top cover, which faces away from the mounting cavity; the support top cover is provided with two openings corresponding to the two connecting plates, and the connecting plates pass through the openings and are connected with the reverse control board; The reverse control board comprises a multi-phase interleaved boost-buck circuit, which is composed of a plurality of boost-buck circuit units, each unit containing a switch tube; a plurality of switch tubes are alternately turned on and turned off with a phase difference to realize interleaved control.

2. The single cell boost battery pack of claim 1, wherein: The support base and the support top cover are made of plastic material; the inside of the support base holds the single cell and cooperates with the support top cover to clamp the single cell.

3. The single cell boost battery pack of claim 2, wherein: The support base is provided with a first buckle and a plurality of first assembly holes along the edge; the support top cover is provided with a second buckle and a plurality of second assembly holes along the edge; The first buckle and the first assembly hole are respectively arranged corresponding to the second buckle and the second assembly hole; during assembly, the first buckle and the second buckle are buckled with each other, and the first assembly hole and the second assembly hole are fixed by screw connection; The end face of the support top cover is provided with a stud for fixing the reverse control board.

4. The single cell boost battery pack of claim 3, wherein: The outside of the support base and the end face of the support top cover are both provided with reinforcing ribs; the bottom of the support base and the end face of the support top cover are both provided with support columns.

5. The single cell boost battery pack of claim 4, wherein: Among the four sides of the support base, two sides are provided with the reinforcing ribs, and the other two sides are provided with fixing lugs; The reinforcing ribs and the fixing lugs are respectively arranged on opposite sides of the support base; the fixing lugs are used for connecting and fixing with the shell body.

6. The single cell boost battery pack of claim 1, wherein: Two placing grooves are arranged on the side wall of the mounting cavity, and the two placing grooves correspond to the two connecting plates; the placing grooves are used for placing the connecting plates and provide space for the movement of the connecting plates.

7. The single cell boost battery pack of claim 1, wherein: The single cell comprises a cell body, a cell positive electrode, a cell negative electrode and an exhaust valve; one of the two connecting plates is connected with the cell positive electrode, and the other is connected with the cell negative electrode; The reverse control board comprises a power input positive terminal, a power input negative terminal, a power output positive terminal, a power output negative terminal and a heat sink; the heat sink is used for heat dissipation of the reverse control board; The power input positive terminal is connected with the cell positive electrode through one of the connecting plates; the power input negative terminal is connected with the cell negative electrode through the other connecting plate.

8. The single cell boost battery pack of claim 7, wherein: The bottom of the support base is provided with an exhaust hole, which communicates with the mounting cavity.

9. The single cell boost battery pack of claim 7, wherein: The shell body is provided with positive and negative two pole columns for external device power supply; The power output positive terminal and the power output negative terminal are connected to the corresponding positive and negative poles through power lines.

10. The single cell boost battery pack of claim 1, wherein: The reverse control board is controlled by pulse width modulation (PWM) to adjust the on-time of the switch tube.

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