Portable starting power supply based on 18650 cell

Abstract

The utility model relates to an automobile starting power supply, in particular to a portable starting power supply based on 18650 battery cells, which comprises a shell, a battery cell module and a circuit protection board, the battery cell module comprises four battery modules which are connected in series, each battery module comprises ten battery monomers which are connected in parallel, the battery monomers are 18650 batteries, and the circuit protection board is connected with the shell. The battery monomers are connected in parallel through the positive pole junction station and the negative pole junction station, all the battery modules are connected in series to form a battery cell module and then are electrically connected with the circuit protection plate, the shell comprises an upper shell and a lower shell, the battery cell module and the circuit protection plate are arranged in the lower shell, and the upper shell is connected with the lower shell in a buckling mode. And the positive pole, the negative pole, the electric quantity display board and the main switch which are arranged on the upper shell are electrically connected with specified positions of the circuit protection board. The starting power supply disclosed by the utility model has the advantages of high energy density, convenience in carrying, capability of avoiding feed, convenience in knowing real-time electric quantity and the like.

Description

Technical Field

[0001] This utility model relates to automotive starting power supplies, specifically to a portable starting power supply based on 18650 battery cells. Background Technology

[0002] Currently, lead-acid batteries are the main type of automotive starting power source. However, lead-acid batteries have several technical problems, including large size, low energy density, inconvenience in carrying and transporting, difficulty in monitoring remaining power, and a tendency to deplete power after prolonged periods of non-use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a portable car starter power supply based on 18650 battery cells, which has the advantages of small weight, easy portability, and easy observation of remaining power.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a portable starting power supply based on 18650 battery cells, including a shell, a battery cell module, and a circuit protection board. The battery cell module includes at least two battery modules, each battery module including a positive current collector, a negative current collector, and at least two individual battery cells. The individual battery cells are 18650 batteries. The positive terminal of each individual battery cell is electrically connected to the positive current collector, and the negative terminal of each individual battery cell is electrically connected to the negative current collector. The battery modules are connected in series and electrically connected to the circuit protection board. The shell includes an upper shell and a lower shell. The lower shell has a cavity, and the battery cell module is placed in the cavity. The upper shell is connected to the lower shell and encapsulates the battery cell module. The upper shell has a positive terminal, a negative terminal, a power display board, and a main switch. The circuit protection board is electrically connected to the positive terminal, the negative terminal, the power display board, and the main switch. The upper shell also has a handle. The battery module uses 18650 batteries, which have high energy density, high assembly efficiency and low system cost. The starting power supply has many advantages such as simple manufacturing and easy upgrading, small size and easy portability.

[0005] As an optional solution, both the positive and negative current collectors are composite current-carrying units. These units consist of a busbar and the current-carrying unit itself. The current-carrying unit is made of pure nickel, while the busbar is made of nickel-plated copper. The current-carrying unit and the busbar are laser-connected. The laser welding of the pure nickel current-carrying unit to the nickel-plated copper busbar allows for high current handling and is suitable for various applications.

[0006] As an optional solution, the positive and negative busbars located at the series connection points of two adjacent battery modules share a single busbar. The circuit protection board is electrically connected to each busbar and detects the status of each battery module. The series connection of two battery modules is achieved by sharing a single busbar. The circuit protection board is electrically connected to each busbar, which not only enables the connection between the cell module and the circuit protection board but also allows the circuit protection board to detect the status of each battery module.

[0007] As an optional solution, the cell module also includes a cell support frame, to which each individual battery cell is connected. This allows the individual battery cells to be secured together, facilitating the integration into a stable structure.

[0008] As an optional solution, the cell support includes at least one fixing plate with mounting holes through which individual battery cells are installed.

[0009] As an optional solution, the mounting plate is a perforated plastic plate. The battery cell bracket is also made of plastic to avoid excessively increasing the weight of the starting power supply.

[0010] As an optional solution, the battery cell module also includes a packaging structure, which includes a packaging board and a packing strap. Each packaging board is attached to the outer end face of the battery cell module and fixed by the packing strap.

[0011] As an optional solution, the encapsulation board is an epoxy board, and the packing strap is fiber tape.

[0012] As an optional solution, a transparent PVC panel is installed on the upper casing at the power display panel.

[0013] As an optional solution, the upper and lower housings are connected by a snap-fit ​​mechanism.

[0014] Compared with the prior art, the advantages of this utility model are as follows: The starting power supply of this utility model uses multiple 18650 batteries, which have the advantages of high energy density, low risk, convenient maintenance, small size and easy transportation and carrying. The starting power supply is equipped with a power display board to facilitate understanding of real-time power, and is also equipped with a master switch so that the power can be turned off at any time when not in use to avoid power failure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the power supply structure.

[0017] Figure 2 An exploded view of the power supply;

[0018] Figure 3 A schematic diagram of the structure of a positive or negative return circuit when the series terminals of two adjacent battery modules share a busbar;

[0019] In the diagram: 11. Upper casing, 12. Lower casing, 13. Power display panel, 14. Main switch, 15. Handle, 16. Positive terminal, 17. Negative terminal, 21. Battery module, 22. Busbar, 23. Current carrier plate, 24. Cell support, 25. Encapsulation board, 26. Packaging strap, 31. Circuit protection board. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0021] Please see Figures 1-3 A portable starting power supply based on 18650 battery cells includes a casing, a battery cell module, and a circuit protection board 31. The battery cell module includes at least two battery modules 21, each comprising a positive current collector, a negative current collector, and at least two individual 18650 batteries. The positive terminals of each battery cell are located at the same end and electrically connected to the positive current collector, and the negative terminals of each battery cell are also located at the same end and electrically connected to the negative current collector. After the battery modules are connected in series to form a battery module, the battery module is electrically connected to the circuit protection board 31. The battery module uses multiple 18650 batteries, resulting in high energy density, high assembly efficiency, and low system cost. It features a simple manufacturing process, low risk, low cost for process upgrades, and convenient maintenance.

[0022] Please see Figure 2 and Figure 3 Both the positive and negative current collectors are composite current-carrying units, comprising a busbar 22 and a current-carrying unit 23. The current-carrying unit 23 is made of pure nickel, while the busbar 22 is made of nickel-plated copper. The current-carrying unit 23 and the busbar 22 are electrically connected by laser welding to form a composite structure. The size of the current-carrying unit 23 is determined by the number of battery cells in the battery module 21. The positive electrode of each battery cell contacts the current-carrying unit 23 of the positive current collector for electrical connection, and the negative electrode of each battery cell contacts the current-carrying unit 23 of the negative current collector for electrical connection. Both the positive and negative current collectors utilize a composite current-carrying unit structure made of pure nickel current-carrying unit 23 and nickel-plated copper busbars, allowing for high current handling and suitability for various application scenarios.

[0023] Please see Figure 3In a preferred embodiment, the positive and negative current collectors located at the series terminals of adjacent battery modules 21 share a busbar 22, that is, the current-carrying segments 23 of the positive and negative current collectors are arranged on the same busbar 22, and the two battery modules 21 are electrically connected and connected in series through the busbar 22.

[0024] The circuit protection board 31 is electrically connected to each busbar 22. Besides enabling the electrical connection between the cell module and the circuit protection board 31, it also facilitates the circuit protection board 31 in detecting the status of each battery pack. The circuit protection board 31 is a prior art BMS circuit board, which will not be described in detail in this patent.

[0025] Please see Figure 2 To facilitate the fixing of individual battery cells, the cell module also includes a cell support 24. Each battery cell is connected to the cell support 24, which fixes the position of each battery cell. Specifically, the cell support 24 includes a fixing plate with mounting holes. These mounting holes are circular holes suitable for battery cells to pass through. Each battery cell passes through its corresponding mounting hole. Furthermore, there are two fixing plates, and battery cells pass through the mounting holes of both fixing plates simultaneously. Multiple battery cells passing through the mounting holes of both fixing plates form a stable cubic structure. The fixing plates are made of perforated plastic to avoid increasing the weight of the starting power supply and improve the portability of the product.

[0026] In a further embodiment, the cell module also includes a packaging structure. After each battery cell is fixed by a cell support 24, the packaging structure encapsulates the formed cell module. The packaging structure includes a packaging plate 25 and packing straps 26. A packaging plate 25 is attached to each of the outer end faces of the cell module. After each packaging plate 25 encapsulates the cell module, the packaging plate 25 is packaged and fixed using packing straps 26. The packaging plate 25 is made of epoxy board, and the packing straps 26 are made of fiber tape to avoid excessively increasing the weight of the starting power supply.

[0027] In a preferred embodiment, the battery module includes four battery modules 21, each battery module 21 including ten battery cells. The ten battery cells are divided into five layers, with two cells arranged side by side in each layer. The four battery modules 21 are arranged horizontally to form a cubic structure and fixed in position by a battery cell bracket 24 to form a cubic structure. A circuit protection board 31 is disposed on the top of the cubic structure and electrically connected to each busbar 22. The encapsulation structure encapsulates both the cubic structure and the circuit protection board 31. An opening for wire harnesses to pass through is provided on the top of the encapsulation structure.

[0028] Please see Figure 1 and Figure 2The housing includes an upper housing 11 and a lower housing 12. The lower housing 12 has a cubic cavity within which the cell module and circuit protection board 31 are tightly nested. The upper housing 11 has a positive terminal 16, a negative terminal 17, a power display board 13, and a main switch 14. The positive terminal 16, negative terminal 17, power display board 13, and main switch 14 are electrically connected to designated locations on the circuit protection board 31 via wiring harnesses. The positive terminal 16 and negative terminal 17 are used to connect to a vehicle or other external devices. The power display board 13 uses a structure similar to existing power meters; after being electrically connected to the designated location on the circuit protection board 31, it can display the real-time power status of the cell module. The main switch 14 is a low-voltage on / off switch used to activate the circuit protection board 31 to display the power status and control the on / off state of the cell module. It allows for power disconnection when the power supply is not in use, preventing power loss.

[0029] Both the upper housing 11 and the lower housing 12 are made of plastic. The upper housing 11 is also provided with a handle 15. In a further embodiment, the handle 15 is foldably connected to the upper housing 11, and the upper housing 11 is provided with a receiving groove suitable for the handle 15 to be folded in. The upper housing 11 and the lower housing 12 are connected by a snap-fit ​​structure, which facilitates disassembly and assembly. A transparent PVC plate is also provided on the upper housing 11 at the power display panel 13, which can protect the power protection panel.

[0030] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A portable starting power supply based on 18650 battery cells, characterized in that: The device includes a casing, a cell module, and a circuit protection board (31). The cell module includes at least two battery modules (21). Each battery module (21) includes a positive current collector, a negative current collector, and at least two battery cells. Each battery cell is an 18650 battery. The positive terminal of each battery cell is electrically connected to the positive current collector, and the negative terminal of each battery cell is electrically connected to the negative current collector. Each battery module (21) is connected in series and then electrically connected to the circuit protection board (31). The casing includes an upper casing (11) and a lower casing (12). The lower housing (12) has a cavity, and the battery cell module is placed in the cavity. The upper housing (11) is connected to the lower housing (12) and encapsulates the battery cell module. The upper housing (11) has a positive terminal (16), a negative terminal (17), a power display board (13), and a main switch (14). The circuit protection board (31) is electrically connected to the positive terminal (16), the negative terminal (17), the power display board (13), and the main switch (14). The upper housing (11) also has a handle (15).

2. A portable starting power supply based on an 18650 battery cell according to claim 1, characterized in that: The positive and negative current collectors are composite current carriers. The composite current carrier includes a busbar (22) and a current carrier (23). The current carrier (23) is made of pure nickel, and the busbar (22) is made of copper plated with nickel. The current carrier (23) and the busbar (22) are laser connected.

3. A portable starting power supply based on an 18650 battery cell according to claim 2, characterized in that: The positive and negative busbars located in the series connection position of two adjacent battery modules (21) share a busbar (22). The circuit protection board (31) is electrically connected to each busbar (22) and detects the status of each battery module (21).

4. A portable starting power supply based on an 18650 battery cell according to claim 3, characterized in that: The cell module also includes a cell support (24), and each battery cell is connected to the cell support (24).

5. A portable starting power supply based on an 18650 battery cell according to claim 4, characterized in that: The cell support (24) includes at least one fixing plate with mounting holes through which individual cells are mounted.

6. A portable starting power supply based on an 18650 battery cell according to claim 5, characterized in that: The fixing plate is a perforated plastic plate.

7. A portable starting power supply based on an 18650 battery cell according to claim 4, characterized in that: The battery cell module also includes a packaging structure, which includes a packaging plate (25) and a packing strap (26). Each packaging plate (25) is attached to each outer end face of the battery cell module and fixed by the packing strap (26).

8. A portable starting power supply based on an 18650 battery cell according to claim 7, characterized in that: The encapsulation board (25) is an epoxy board, and the packing strap (26) is a fiber tape.

9. A portable starting power supply based on an 18650 battery cell according to claim 7, characterized in that: A transparent PVC plate is provided on the upper housing (11) at the power display panel (13).

10. A portable starting power supply based on an 18650 battery cell according to claim 9, characterized in that: The upper housing (11) and the lower housing (12) are connected by a snap-fit.

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