Battery monomer and charging device

Abstract

The utility model is applicable to the technical field of batteries, and provides a single battery and a charging device, the single battery comprises a shell with a cavity, a battery cell arranged in the cavity, a positive terminal, a negative terminal and a discharging interface, the positive terminal, the negative terminal and the discharging interface are arranged on the shell, a positive plate of the battery cell is connected with the positive terminal, and a negative plate of the battery cell is connected with the negative terminal; a through hole communicated with the cavity is formed in the side wall of the shell, and the discharge interface corresponds to the through hole and is electrically connected with the positive plate and the negative plate of the battery cell. The battery monomer is provided with at least two discharge paths, can discharge through the positive terminal and the negative terminal of the battery monomer, and also can be independently discharged as an independent power supply unit after being connected with external electric equipment through the discharge interface of the battery monomer. The single battery has a wider application range and can meet power supply requirements under more conditions.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell and a charging device. Background Art

[0002] With the rapid development of energy storage battery technology, various batteries are continuously optimized in terms of energy density and volume, meeting the power needs of various large, medium and small equipment.

[0003] As the smallest unit, battery cells are usually connected in series to obtain high voltage, or in parallel to obtain larger current and battery capacity. Of course, in most cases, series and parallel can be combined to meet higher application requirements.

[0004] Based on the above, the application of battery cells is subject to certain limitations. In most cases, they require a certain assembly structure to discharge together with other battery cells, or require a certain switching structure to discharge. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a battery cell, aiming to solve the technical problem of limited use of existing battery cells.

[0006] The embodiment of the present application is implemented as follows: a battery cell includes: a shell having a cavity, a battery cell arranged in the cavity, a positive terminal, a negative terminal, and a discharge interface arranged on the shell; the positive electrode sheet of the battery cell is connected to the positive terminal, and the negative electrode sheet of the battery cell is connected to the negative terminal; a through hole connected to the cavity is provided on the side wall of the shell, and the discharge interface is arranged corresponding to the through hole and is electrically connected to both the positive electrode sheet and the negative electrode sheet of the battery cell.

[0007] In one embodiment, the discharge interface is a USB Type A interface, a USB Type C interface or a Micro USB interface.

[0008] In one embodiment, the battery cell is a lithium cobalt oxide battery cell, a lithium manganese oxide battery cell, a lithium iron phosphate battery cell or a nickel cobalt manganese lithium battery cell.

[0009] In one embodiment, the battery cell further includes a partition plate disposed in the cavity and sealed to the inner wall of the shell, the partition plate divides the cavity into a first cavity and a second cavity, the battery cell is disposed in the first cavity, the through hole is connected to the second cavity, and the discharge interface is located in the second cavity.

[0010] In one embodiment, a positive electrode line and a negative electrode line are provided on the partition plate, one end of the positive electrode line is connected to the positive electrode sheet of the battery cell, and the other end of the positive electrode line is connected to the positive terminal and the discharge interface, one end of the negative electrode line is connected to the negative electrode sheet, and the other end of the negative electrode line is connected to the discharge interface.

[0011] In one embodiment, one end of the shell is provided with an opening communicating with the cavity, and the battery cell further includes a cover provided at the opening; the positive terminal is provided on the cover.

[0012] In one embodiment, the shell is a metal shell, which is electrically connected to the negative electrode sheet, and an end of the shell facing away from the cover serves as the negative terminal.

[0013] In one embodiment, the cover is an insulating member, and the positive terminal is a positive pole mounted on the cover.

[0014] In one embodiment, the housing is a cylindrical housing or a square housing.

[0015] Another purpose of an embodiment of the present application is to provide a charging device, which includes: a box that can be opened and closed, a plurality of battery cells as described in the above embodiments arranged in the box, and an electrical connection port arranged on the shell, the plurality of battery cells are connected in parallel and / or in series, and the electrical connection port is electrically connected to the positive terminal and the negative terminal of each battery cell.

[0016] The battery cell and charging device provided in the embodiments of the present application have the following beneficial effects:

[0017] The battery cell provided in the embodiment of the present application includes a shell having a cavity, a battery cell arranged in the cavity, a positive terminal and a negative terminal arranged on the shell, and a discharge interface. The positive electrode of the battery cell is connected to the positive terminal, and the negative electrode of the battery cell is connected to the negative terminal. The discharge interface is arranged in a through hole on the side wall of the shell and is electrically connected to both the positive electrode and the negative electrode of the battery cell. In this way, the battery cell has at least two discharge paths, and can be discharged through its positive terminal and negative terminal. For example, multiple battery cells can be discharged after being connected in series and / or in parallel through the positive terminal and the negative terminal, or they can be discharged separately as an independent power supply unit after being connected to an external electrical device through its discharge interface. The battery cell has a wider range of usage scenarios and can meet power supply needs under more conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic structural diagram of a battery cell provided in an embodiment of the present application;

[0020] Figure 2 This is a schematic exploded perspective view of a battery cell provided in an embodiment of the present application;

[0021] Figure 3 is a schematic exploded perspective view of a battery cell provided in an embodiment of the present application from another angle;

[0022] Figure 4 is a schematic diagram of the cross-sectional structure of a battery cell provided in an embodiment of the present application;

[0023] Figure 5 is an equivalent circuit diagram of a battery cell provided in an embodiment of the present application;

[0024] Figure 6 It is a structural diagram of the charging device provided in an embodiment of the present application.

[0025] The meanings of the marks in the figure are:

[0026] 200-charging device, 90-box, 91-electrical connection port;

[0027] 100-battery cell;

[0028] 3-cover plate, 30-mounting hole;

[0029] 4-shell, 40-cavity, 401-first cavity, 402-second cavity, 41-through hole, 42-opening;

[0030] 5-battery cell, 51-positive electrode sheet, 52-negative electrode sheet, 53-diaphragm;

[0031] 61-positive terminal, 611-positive pole, 62-negative terminal;

[0032] 7-discharge interface, 71-positive pin, 72-negative pin;

[0033] 8-Divider plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] It should be noted that when a component is referred to as being "fixed on" or "set on" another component, it may be fixed or set on the other component directly or indirectly. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0036] In order to illustrate the technical solution described in this application, the following is a detailed description with reference to specific drawings and embodiments.

[0037] See also Figure 1 、 Figure 2 and Figure 5 As shown, the embodiment of the present application provides a battery cell 100, which includes a housing 4, a battery cell 5, a positive terminal 61, a negative terminal 62, and a discharge port 7. Specifically, the housing 4 is a structure having a cavity 40, and the battery cell 5 is disposed inside the cavity 40. The battery cell 5 includes a positive electrode sheet 51 and a negative electrode sheet 52 that are spaced apart from each other. Figure 5 As shown, the positive terminal 61 and the negative terminal 62 are both provided on the housing 4, the positive electrode sheet 51 is electrically connected to the positive terminal 61, and the negative electrode sheet 52 is electrically connected to the negative terminal 62; and the side wall of the housing 4 is further provided with a through hole 41 communicating with the cavity 40, and the discharge interface 7 is provided on the housing 4 and corresponds to the through hole 41, and the positive pin 71 and the negative pin 72 of the discharge interface 7 are respectively connected to the positive electrode sheet 51 and the negative electrode sheet 52 of the battery cell 5. Please refer to Figure 5 shown.

[0038] A set of interfaces consisting of a positive terminal 61 and a negative terminal 62 is connected in parallel with the discharge interface 7 on the housing 4. Figure 5 When the battery cell 100 is used, the positive terminal 61 and the negative terminal 62 are connected to an electric device to supply power to the electric device, and the discharge port 7 is connected to an electric device to supply power to the electric device.

[0039] In this way, the battery cell 100 can provide at least two discharge paths, achieving external power output through different connection methods. The battery cell 100 can discharge through its positive terminal 61 and negative terminal 62, including a single battery cell 100 discharging through its positive terminal 61 and negative terminal 62, as well as multiple battery cells 100 discharging through the positive terminal 61 and negative terminal 62 in series and / or in parallel. It can also be connected to an external electrical device through its discharge interface 7 and discharged as an independent power supply unit. The battery cell 100 has a wider range of usage scenarios and can meet power supply needs under more conditions.

[0040] The battery cell 100 of the present embodiment may be a secondary battery. After discharge, it can be recharged to activate the active material and continue to be used. In this case, the battery cell 100 can be charged by connecting an external power source to the positive terminal 61 and the negative terminal 62, or by connecting an external power source to the discharge port 7.

[0041] In other optional embodiments, the battery cell 100 may be a primary battery.

[0042] The battery cell 100 is a basic unit for realizing mutual conversion between chemical energy and electrical energy.

[0043] The battery cell 5 of the battery cell 100 is the core component for realizing the charge and discharge functions. According to the difference in the material and electrochemical reaction of the battery cell 5, the battery cell 100 is a different type of battery.

[0044] For example, the battery cell 100 is a nickel-cadmium battery, a nickel-metal hydride battery, a lead-acid battery, a lithium-ion battery, or a polymer lithium-ion battery.

[0045] Taking a lithium-ion battery as an example, within the battery cell 5, the positive electrode sheet 51 and the negative electrode sheet 52 are separated and insulated from each other by a separator. The battery cell 100 primarily relies on the movement of metal ions between the positive electrode sheet 51 and the negative electrode sheet 52 to operate. The positive electrode sheet 51 includes a positive electrode current collector and a positive electrode active material layer (neither of which are shown in the figure). The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector not coated with the positive electrode active material layer serves as the positive electrode tab. The negative electrode sheet 52 includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector not coated with the negative electrode active material layer serves as the negative electrode tab.

[0046] In order to ensure that large currents can pass without melting, there are multiple positive electrode tabs and they are stacked together, and there are multiple negative electrode tabs and they are stacked together.

[0047] The material of the isolation film can be PP (polypropylene) or PE (polyethylene).

[0048] In addition, the positive electrode sheet 51 and the negative electrode sheet 52 in the battery cell 5 can be in a wound structure or a stacked structure, which is not particularly limited in the embodiment of the present application.

[0049] Taking lithium-ion batteries as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, lithium nickel cobalt manganese oxide, or lithium manganese oxide. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon.

[0050] In one embodiment, the housing 4 may be cylindrical, flat, rectangular, or in other shapes, etc. This embodiment of the present application does not impose any particular limitation on this.

[0051] like Figures 1 to 3 As shown, in an optional embodiment, the housing 4 is a cylinder.

[0052] In one embodiment, the material of the housing 4 is not limited. Optionally, the housing 4 can be made of a hard material, for example, a metal material, or a hard non-metallic material to keep the housing 4 in a fixed shape.

[0053] In an optional embodiment, the housing 4 is made of metal material, such as steel or aluminum.

[0054] Further optionally, the metal shell 4 is electrically connected to the negative electrode sheet 52. In this way, the shell 4 is negatively charged, or in other words, a part of the shell 4 serves as the negative terminal 62 mentioned above. Figure 2 Medium to Figure 4 shown.

[0055] The negative electrode sheet 52 is connected to the housing 4 via the negative electrode tab. In an optional embodiment, the end of the housing 4 away from the opening 42 thereof serves as a negative terminal 62 for connecting to an electrical device.

[0056] In an alternative embodiment, see Figure 2 and 3As shown, the positive terminal 61 includes a conductive positive electrode post 611. The battery cell 100 also includes a cover plate 3. One end of the housing 4 is provided with an opening 42 that communicates with the cavity 40. The cover plate 3 is disposed over the opening 42 to enclose the battery cell 5 within the housing 4. The positive electrode post 611 is disposed on the cover plate 3. Its inner end is connected to the positive electrode sheet 51 via a positive electrode tab, and its outer end is used to connect to an electrical device. In other optional embodiments, the positive electrode post 611 is replaced with a sheet-like conductor disposed on the cover plate 3.

[0057] Specifically, a through mounting hole 30 is provided on the cover plate 3 , and the positive electrode column 611 is disposed in the through hole 41 and is sealed and connected to the inner peripheral wall of the through hole 41 .

[0058] The cover plate 3 is made of non-conductive material and is used to insulate the positive electrode column 611 from the housing 4 .

[0059] It is understandable that, in an optional embodiment, the outer periphery of the shell 4 of the battery cell 100 may further be provided with an insulating layer (not shown), such as a plastic layer, which allows at least the positive terminal 61 and the negative terminal 62 to be exposed.

[0060] In one embodiment, the type of the discharge interface 7 is not limited, and any interface that can be electrically connected to an external electrical device can be used.

[0061] For example, the discharge interface 7 is a USB A type interface, a USB C type interface or a Micro USB interface.

[0062] In one embodiment, the size of the battery cell 100 is not limited. Optionally, according to actual needs, the size of the battery cell 100 can be designed to be a standard model size. For example, in an optional embodiment, the diameter of the battery cell 100 is 18mm and the height is 65mm, which is the same as the appearance of a lithium-ion 18650 battery; or, the diameter of the battery cell 100 is 21mm and the height is 70mm, which is the same as the appearance of a lithium-ion 21700 battery. In this way, the battery cell 100 can have the same application method as a standard model battery in actual application, and can also output electrical energy as an independent structure. In more cases, the battery cell 100 can be designed to the size of other standard model batteries, and no longer exemplified one by one.

[0063] Next, see Figure 3 、 Figure 4 and Figure 5 As shown, the battery cell 100 also includes a partition plate 8 arranged in the cavity 40 and sealed to the inner wall of the shell 4. The partition plate 8 divides the cavity 40 of the shell 4 into a first cavity 401 and a second cavity 402. The battery cell 5 is arranged in the first cavity 401, the through hole 41 is connected to the second cavity 402, and the discharge interface 7 is located in the second cavity 402.

[0064] The purpose of such a setting is that the partition plate 8 isolates the battery cell 5 from the discharge interface 7, thereby preventing the positive active material and / or negative active material of the battery cell 5 from flowing to the discharge interface 7, thereby avoiding affecting the normal operation of the battery cell 5 and the normal operation of the discharge interface 7.

[0065] On this basis, the electrical connection between the positive electrode tab, the negative electrode tab and the discharge interface 7 is achieved through a wiring (not shown), that is, one end of the wiring is connected to the positive electrode tab and the negative electrode tab of the battery cell 5, and the other end of the wiring is connected to the positive pin 71 and the negative pin 72 of the discharge interface 7.

[0066] In one embodiment, the wiring is provided on the partition plate 8. Specifically, the wiring includes a positive wiring and a negative wiring provided on the partition plate 8. One end of the positive wiring is connected to the positive electrode tab of the battery cell 5, and the other end of the positive wiring is connected to the positive terminal 61 and the positive pin 71 of the discharge interface 7. One end of the negative wiring is connected to the negative electrode tab, and the other end of the negative wiring is connected to the negative pin 72 of the discharge interface 7.

[0067] In an optional embodiment, the separator plate 8 includes a separator body layer and a circuit board. The separator body layer and the circuit board are stacked and fixedly arranged, and either the separator body layer or the circuit board can be positioned adjacent to the discharge port 7. The periphery of the separator body layer is sealed to the inner wall of the housing 4, primarily serving to separate the cavity 40 and prevent leakage of the positive and / or negative active materials. The circuit board is primarily used to arrange the aforementioned positive and negative electrode wiring. It will be understood that the positive and negative electrode wiring still need to pass through the separator body layer.

[0068] In other optional embodiments, the main body layer can be eliminated if the periphery of the circuit board can be sealed to the inner wall of the housing 4. Alternatively, the circuit board can be eliminated, and the positive and negative electrode traces do not need to extend on the surface of the separator 8, but only need to pass through the separator 8.

[0069] In short, the form of the partition plate 8 is not limited, as long as it can separate the cavity 40 and allow the positive electrode tab, the negative electrode tab to be electrically connected to the discharge interface 7 and the positive terminal 61.

[0070] See also Figure 5 As shown, in one embodiment, the discharge port 7 can be entirely located within the second space. In other optional embodiments, a portion of the discharge port can be located within the through-hole 41. Optionally, the discharge port does not protrude from the outer circumference of the housing 4, but can be recessed relative to or flush with the outer circumference to prevent the discharge port 7 from affecting the normal use of the battery cell 100.

[0071] The battery cell 100 provided in the embodiment of the present application can be used as a separate power supply structure to supply power to an electrical device. For example, a battery cell 100 can be placed in the battery compartment of an electrical device and power can be supplied to the device via the positive terminal 61 and the negative terminal 62. Alternatively, a power supply (such as a mobile phone) can be connected to the discharge port 7 via an adapter cable to supply power to the device.

[0072] The battery cells 100 provided in the embodiment of the present application can be combined in multiple units to supply power to an electrical device. For example, multiple battery cells 100 can be connected in series, in parallel, or in a combination of series and parallel to supply power to an electrical device.

[0073] Therefore, the embodiment of the present application further provides a charging device 200, such as Figure 6 As shown, it includes: an openable and closable housing 90, a plurality of battery cells 100 as described in the above embodiments disposed within the housing 90, and an electrical connection port 91 disposed on the housing 4. The plurality of battery cells 100 are connected in parallel and / or in series and then electrically connected to the electrical connection port 91. In this manner, the charging device 200 can supply power to an electrical device through the electrical connection port 91.

[0074] The box body 90 can be opened and closed, allowing any battery cell 100 to be taken out and used as a separate power supply structure to supply power to electrical equipment. Please refer to the above-mentioned embodiments for details, which will not be repeated here.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery cell, characterized in that: include: A shell having a cavity, a battery cell disposed in the cavity, a positive terminal, a negative terminal, and a discharge interface disposed on the shell; The positive electrode sheet of the battery cell is connected to the positive terminal, and the negative electrode sheet of the battery cell is connected to the negative terminal; a through hole communicating with the cavity is provided on the side wall of the shell, and the discharge interface is arranged corresponding to the through hole and is electrically connected to both the positive electrode sheet and the negative electrode sheet of the battery cell.

2. The battery cell according to claim 1, wherein The discharge interface is a USB A type interface, a USB C type interface or a Micro USB interface.

3. The battery cell according to claim 1, wherein The battery cell is a lithium cobalt oxide battery cell, a lithium manganese oxide battery cell, a lithium iron phosphate battery cell or a nickel cobalt manganese lithium battery cell.

4. The battery cell according to claim 1, wherein: The battery cell also includes a partition plate disposed in the cavity and sealed to the inner wall of the shell, the partition plate dividing the cavity into a first cavity and a second cavity, the battery cell is disposed in the first cavity, the through hole is connected to the second cavity, and the discharge interface is located in the second cavity.

5. The battery cell according to claim 4, wherein: A positive electrode line and a negative electrode line are provided on the partition plate, one end of the positive electrode line is connected to the positive electrode sheet of the battery cell, and the other end of the positive electrode line is connected to the positive terminal and the discharge interface, one end of the negative electrode line is connected to the negative electrode sheet, and the other end of the negative electrode line is connected to the discharge interface.

6. The battery cell according to any one of claims 1 to 5, characterized in that One end of the shell is provided with an opening communicating with the cavity, and the battery cell further includes a cover provided at the opening; the positive terminal is provided on the cover.

7. The battery cell according to claim 6, wherein: The shell is a metal shell, electrically connected to the negative electrode sheet, and one end of the shell away from the cover serves as the negative terminal.

8. The battery cell according to claim 6, wherein: The cover is an insulating member, and the positive terminal is a positive pole installed on the cover.

9. The battery cell according to any one of claims 1 to 5, characterized in that The shell is a cylindrical shell or a square shell.

10. A charging device, characterized in that: include: A box that can be opened and closed, a plurality of battery cells as described in any one of claims 1 to 9 arranged in the box, and an electrical connection port provided on the shell, a plurality of the battery cells are connected in parallel and / or in series, and the electrical connection port is electrically connected to the positive terminal and the negative terminal of each of the battery cells.

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