Single battery cell with adjustable series-parallel connection function

Abstract

The application discloses a single battery cell with series-parallel adjustable function, which comprises a battery cell shell and a plurality of core packages, the battery cell shell is internally provided with a first cavity and a second cavity which extend along the axial direction and are open at both ends, and a positive pole and a negative pole are respectively arranged at the positive pole end opening and the negative pole end opening of the battery cell shell; part of the plurality of core packages are connected in series and arranged in the first cavity, and the other part is connected in parallel and arranged in the second cavity; the positive pole is provided with a butt joint portion connected with the core packages, the positive pole is rotatable relative to the battery cell shell so that the butt joint portion selectively faces one of the first cavity and the second cavity, and the butt joint portion is in contact connection with the core packages in the corresponding cavity. The single battery cell with series-parallel adjustable function does not need to be disassembled and rearranged, can meet the individual demand of external equipment on series connection and parallel connection of the battery cell, is simple and easy to implement, and cost is saved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a single-cell battery with integrated series-parallel adjustable function. Background Technology

[0002] When existing battery cells achieve the series-parallel connection function, individual cells need to be arranged in a series-parallel manner first, and then welded together by laser welding or resistance welding to achieve the series-parallel connection. When it is necessary to change the series-parallel connection method, it is done by splitting the battery module or cells. It is impossible to achieve a fast and adjustable series-parallel connection function, and the process is complex and costly. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a single cell with a series-parallel adjustable function in view of the defects and deficiencies of the prior art. This single cell can use one of the series-connected and parallel-connected cores as the output power by rotating the positive terminal, so that the individual needs of external devices for series and parallel connection of the cells can be met without disassembling and rearranging the cells. The method is simple, easy to implement and cost-saving.

[0004] The single-cell battery with integrated series-parallel adjustable function according to an embodiment of the present invention includes: a cell housing, wherein the cell housing has a first chamber and a second chamber extending along its axial direction and open at both ends, and a positive terminal post and a negative terminal post are respectively installed at the positive terminal opening and the negative terminal opening of the cell housing; a plurality of core packages, wherein a portion of the plurality of core packages is connected in series and disposed in the first chamber, and another portion is connected in parallel and disposed in the second chamber, the positive terminal post has a docking portion that connects to the core package, and the positive terminal post is rotatable relative to the cell housing so that the docking portion selectively faces one of the first chamber and the second chamber, and the docking portion contacts and connects with the core package in the corresponding chamber.

[0005] The single-cell battery with integrated series-parallel adjustable function in this embodiment of the invention has a first chamber and a second chamber inside the cell housing. The core packages in the first chamber are connected in series, and the core packages in the second chamber are connected in parallel. The positive terminal post is rotatable relative to the housing so that the docking part provided on the positive terminal post can selectively connect to the core packages in the first chamber or the second chamber. Thus, by rotating the positive terminal post, one of the series-connected core packages or the parallel core packages can be used as the output power source. Therefore, the battery cell does not need to be disassembled or rearranged, which can meet the individual needs of external devices for series and parallel connection of battery cells. The method is simple, easy to implement, and cost-effective.

[0006] In some embodiments, the single cell with integrated series-parallel adjustable function further includes a partition assembly, which includes a support column vertically disposed at the center of the cell housing and a partition plate connected to the outer peripheral surface of the support column. The partition plate is vertically disposed and extends radially along the support column, and the partition plate is used to separate the first chamber and the second chamber within the cell housing.

[0007] In some embodiments, the positive terminal post includes a post, a cover plate, and an elastic fluid. The cover plate is connected to the positive terminal of the cell housing and closes the positive terminal opening inside the cell housing. The post passes through the cover plate and protrudes towards the inner portion of the cell housing. The elastic fluid is arranged around the outer periphery of the post, and the mating portion is connected to the elastic fluid. The mating portion is located at the protruding portion of the post inside the cell housing and extends radially along the post.

[0008] In some embodiments, the end of the support facing the positive electrode post has a socket, and one end of the column extending into the cell housing fits into the socket.

[0009] In some embodiments, the partitions are a plurality of partitions arranged circumferentially along the support, and a sub-chamber is formed between adjacent partitions. Each sub-chamber is fitted with a core package. A portion of the plurality of sub-chambers forms a first chamber and the core packages in the sub-chambers are connected in series, while another portion forms a second chamber and the core packages in the sub-chambers are connected in parallel.

[0010] In some embodiments, the single cell with integrated series-parallel adjustable function further includes a first current collector and a second current collector. The first current collector is installed at the positive terminal opening of the first chamber, and the second current collector is installed at the positive terminal opening of the second chamber. The docking portion is located on the side of the first current collector and the second current collector away from the negative terminal post. When the docking portion is opposite to the first chamber, it can contact the first current collector. When the docking portion is opposite to the second chamber, it can contact the second current collector.

[0011] In some embodiments, the docking portion is a collector plate, and the collector plate has contact protrusions on its side facing the chamber.

[0012] In some embodiments, any one of the plurality of sub-chambers is symmetrical about the central axis of the cell housing with respect to one of the remaining sub-chambers, and the core packages in the symmetrically arranged sub-chambers can be connected in series or in parallel, and the current collectors include two symmetrically arranged about the column.

[0013] In some embodiments, the cover plate has an annular groove on the side facing the cell housing, and one end of the cell housing facing the cover plate fits into the annular groove.

[0014] In some embodiments, a layer of magnetic material is laid on the inner wall of the annular groove and the surface of the cell housing facing the end of the cover plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a single battery cell with integrated series-parallel adjustable function according to an embodiment of the present invention.

[0016] Figure 2 This is an assembly diagram of the positive terminal and the cell housing of a single cell with integrated series-parallel adjustable function according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the positive terminal of a single-cell battery with integrated series-parallel adjustable function according to an embodiment of the present invention.

[0018] Figure label:

[0019] The battery cell housing 1, first chamber 11, second chamber 12, positive terminal post 2, column 21, docking part 22, elastic fluid 23, contact protrusion 24, cover plate 25, negative terminal post 3, support column 41, partition plate 42, first current collector 5, second current collector 6. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] like Figures 1-3 As shown, the single-cell battery with integrated series-parallel adjustable function in this embodiment of the invention includes a cell housing 1 and multiple cell packs.

[0022] Specifically, such as Figures 1-3 As shown, the battery cell housing 1 has a first chamber 11 and a second chamber 12 extending along its axial direction and open at both ends. A positive terminal post 2 and a negative terminal post 3 are respectively installed at the positive terminal opening and the negative terminal opening of the battery cell housing 1. Parts of the multiple core packages are connected in series and disposed in the first chamber 11, and the other part is connected in parallel and disposed in the second chamber 12. The positive terminal post 2 has a docking part 22 that connects to the core package. The positive terminal post 2 is rotatable relative to the battery cell housing 1 so that the docking part 22 is selectively opposite to one of the first chamber 11 and the second chamber 12. The docking part 22 contacts and connects with the core package in the corresponding chamber.

[0023] In other words, the single cell of this application has series and parallel regions constructed within the cell housing 1. By rotating the positive terminal 2, the docking part 22 can selectively contact and connect with the core package in one of the regions, thereby allowing the power supply mode of the cell to be switched at will. That is, without the need to disassemble and rearrange the cell, the single cell of this application can meet the individual needs of external devices for series and parallel cell connections. The method is simple, easy to implement, and cost-effective.

[0024] To facilitate understanding, let's take a practical application as an example. For instance, when the external device requires a higher voltage, the positive terminal 2 can be rotated to the position where the docking part 22 is opposite to the first chamber 11 to draw out the current from the cell in the series connection area. When the external device requires a higher current, the positive terminal 2 can be rotated to the position where the docking part 22 is opposite to the second chamber 12 to draw out the current from the cell in the parallel connection area. It is understandable that during mode switching, no disassembly or assembly of the individual cell is required; only the positive terminal 2 needs to be rotated, making the operation simple and convenient.

[0025] The single-cell battery with integrated series-parallel adjustable function in this embodiment of the invention has a first chamber 11 and a second chamber 12 inside the battery cell housing 1. The cores in the first chamber 11 are connected in series, and the cores in the second chamber 12 are connected in parallel. The positive terminal 2 is rotatable relative to the housing so that the docking part 22 provided on the positive terminal 2 can selectively connect to the cores in the first chamber 11 or the second chamber 12. Thus, by rotating the positive terminal 2, one of the series-connected cores and the parallel cores can be used as the output power source. Therefore, the battery cell does not need to be disassembled or rearranged, which can meet the individual needs of external devices for series and parallel connection of battery cells. The method is simple, easy to implement, and cost-effective.

[0026] Specifically, such as Figures 1-3 As shown, the single-cell battery with integrated series-parallel adjustable function also includes a separator assembly. The separator assembly includes a support column 41 vertically disposed at the center of the cell housing 1 and a separator plate 42 connected to the outer peripheral surface of the support column 41. The separator plate 42 is vertically disposed and extends radially along the support column 41. The separator plate 42 is used to separate a first chamber 11 and a second chamber 12 within the cell housing 1. Thus, by setting the separator assembly to separate the first chamber 11 and the second chamber 12, the phenomenon of contact short circuit between the series and parallel regions can be avoided, and the independent space can also suppress cell sway and extend the service life of the battery cell.

[0027] Furthermore, such as Figures 1-3As shown, the positive terminal 2 includes a column 21, a cover plate 25, and an elastic current-carrying fluid 23. The cover plate 25 is connected to the positive terminal of the cell housing 1 and closes the positive terminal opening of the cell housing 1. The column 21 passes through the cover plate 25 and protrudes towards the inside of the cell housing 1. The elastic current-carrying fluid 23 is arranged around the outer periphery of the column 21. The mating part 22 is provided on the protruding part of the column 21 located inside the cell housing 1 and extends radially along the column 21, and the mating part 22 is connected to the elastic current-carrying fluid 23. Thus, rotating the cover plate 25 can drive the positive terminal 2 to rotate, and rotating the positive terminal 2 can drive the mating part 22 to change position around the circumference of the cell housing 1, so as to select the series or parallel connection area to be connected. The elastic current-carrying fluid 23 can lead out current through the mating part 22.

[0028] Preferably, the end of the support column 41 facing the positive electrode post 2 has a socket, and one end of the column body 21 extending into the cell housing 1 fits into the socket. Thus, the column body 21 can serve as a pivot for the rotation of the positive electrode post 2, and the socket can restrict the column body 21 to the central axis position of the cell housing 1, ensuring smooth rotation of the positive electrode post 2 and preventing deviation, thereby enabling the docking part 22 to stably dock with the core package in the series and parallel regions.

[0029] Preferably, the column 21 and the support column 41 are fitted with a clearance.

[0030] Furthermore, such as Figures 1-3 As shown, multiple partitions 42 are arranged circumferentially along the support column 41, and adjacent partitions 42 form a sub-chamber. Each sub-chamber is equipped with a core package. Part of the multiple sub-chambers forms the first chamber 11, and the core packages in the sub-chamber are connected in series. The other part forms the second chamber 12, and the core packages in the sub-chamber are connected in parallel. In other words, the multiple core packages in the single cell of this application are all set in independent spaces, eliminating the problem of core package collision short circuit.

[0031] Optionally, the number of core packages can be determined according to requirements.

[0032] Furthermore, such as Figures 1-3 As shown, the single cell also includes a first current collector 5 and a second current collector 6. The first current collector 5 is installed at the positive terminal opening of the first chamber 11, and the second current collector 6 is installed at the positive terminal opening of the second chamber 12. The docking part 22 is located on the side of the first current collector 5 and the second current collector 6 opposite to the negative terminal post 3. When the docking part 22 is opposite to the first chamber 11, it can contact the first current collector 5; when the docking part 22 is opposite to the second chamber 12, it can contact the second current collector 6. Thus, by setting the current collectors, current can be collected from the cell packs in the series and parallel regions. The docking part 22 and the current collector are connected by contact. Therefore, when switching between series and parallel, it is only necessary to rotate the positive terminal post 2 into position to automatically dock the docking part 22 with the corresponding current collector, which is simple to operate.

[0033] Preferably, such as Figures 1-3 As shown, the docking part 22 is a collector plate, and the side of the collector plate facing the cavity has contact protrusions 24. Thus, the contact protrusions 24 can ensure the reliability of the contact between the docking part 22 and the collector plate.

[0034] Preferably, there are multiple contact protrusions 24. Preferably, the contact protrusions 24 are spherical protrusions.

[0035] Preferably, the shape of the collector plate matches that of the collector plate.

[0036] Furthermore, such as Figure 2 As shown, any one of the multiple sub-chambers is symmetrical about the central axis of the cell housing 1 with respect to one of the remaining sub-chambers, and the cores in the symmetrically arranged sub-chambers can be connected in series or in parallel. The current collectors include two symmetrically arranged about the column 21. Thus, when the positive terminal 2 is rotated so that one current collector is opposite to one sub-chamber, the other current collector can automatically be opposite to the corresponding sub-chamber, and the two symmetrical sub-chambers are individually connected in parallel or series, thereby ensuring that a single cell outputs independently in series or parallel mode.

[0037] Furthermore, in some embodiments, the cover plate 25 has an annular groove on the side facing the cell housing 1, and one end of the cell housing 1 facing the cover plate 25 fits into the annular groove. Thus, the fit between the annular groove and the end of the housing can position and limit the positive electrode post 2.

[0038] Furthermore, a magnetic material layer is laid on the inner wall of the annular groove and the surface of the end of the cell housing 1 facing the cover plate 25. Thus, by utilizing the adsorption effect of the magnetic material, the positive electrode post 2 can be adsorbed onto the end of the cell housing 1 in the axial direction, preventing the positive electrode post 2 from falling off while not affecting the rotation of the positive electrode post 2.

[0039] Optionally, the assembly of the positive electrode post 2 and the cell housing 1 can be carried out in various ways, not limited to using magnetic adsorption to prevent detachment. For example, annular baffles spaced apart in the axial direction can be set on the cell housing 1 and the cover plate 25 respectively. The two annular baffles can stop each other to prevent detachment. At the same time, the rotation of the positive electrode post 2 is not interfered with.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A single-cell battery with built-in series-parallel adjustable function, characterized in that, include: A battery cell housing, wherein the battery cell housing has a first chamber and a second chamber extending along its axial direction and open at both ends, and a positive terminal post and a negative terminal post are respectively installed at the positive terminal opening and the negative terminal opening of the battery cell housing; Multiple core packages are provided, with a portion of the core packages connected in series and disposed in the first chamber, and another portion connected in parallel and disposed in the second chamber. The positive terminal has a docking portion that connects to the core package. The positive terminal is rotatable relative to the cell housing so that the docking portion is selectively aligned with one of the first chamber and the second chamber, and the docking portion contacts and connects with the core package in the corresponding chamber.

2. The single-cell battery with integrated series-parallel adjustable function according to claim 1, characterized in that, It also includes a partition assembly, which includes a support column vertically disposed at the center of the cell housing and a partition plate connected to the outer peripheral surface of the support column. The partition plate is vertically disposed and extends radially along the support column, and the partition plate is used to separate the first chamber and the second chamber within the cell housing.

3. The single-cell battery with integrated series-parallel adjustable function according to claim 2, characterized in that, The positive terminal includes a column, a cover plate, and an elastic fluid. The cover plate is connected to the positive terminal of the cell housing and closes the positive terminal opening of the cell housing. The column passes through the cover plate and protrudes towards the inner part of the cell housing. The elastic fluid is arranged around the outer periphery of the column, and the mating part is connected to the elastic fluid. The mating part is located at the protruding part of the column inside the cell housing and extends radially along the column.

4. The single-cell battery with integrated series-parallel adjustable function according to claim 3, characterized in that, The end of the support facing the positive electrode has a socket, and one end of the support extending into the cell housing fits into the socket.

5. The single-cell battery with integrated series-parallel adjustable function according to claim 3, characterized in that, The partitions are arranged in multiple circumferentially along the support column, and adjacent partitions form a sub-chamber. Each sub-chamber is equipped with a core package. A portion of the multiple sub-chambers forms the first chamber and the core packages in the sub-chambers are connected in series, while another portion forms the second chamber and the core packages in the sub-chambers are connected in parallel.

6. The single-cell battery with integrated series-parallel adjustable function according to claim 5, characterized in that, It also includes a first collector plate and a second collector plate. The first collector plate is installed at the positive terminal opening of the first chamber, and the second collector plate is installed at the positive terminal opening of the second chamber. The docking part is located on the side of the first collector plate and the second collector plate away from the negative terminal post. When the docking part is opposite to the first chamber, it can contact the first collector plate. When the docking part is opposite to the second chamber, it can contact the second collector plate.

7. The single-cell battery with integrated series-parallel adjustable function according to claim 6, characterized in that, The docking part is a flow collector plate, and the side of the flow collector plate facing the cavity has contact protrusions.

8. The single-cell battery with integrated series-parallel adjustable function according to claim 7, characterized in that, Each of the plurality of sub-chambers is symmetrical about the central axis of the cell housing with respect to one of the other sub-chambers, and the core packages in the symmetrically arranged sub-chambers can be connected in series or in parallel, and the current collectors include two symmetrically arranged about the column.

9. The single-cell battery with integrated series-parallel adjustable function according to any one of claims 3-8, characterized in that, The cover plate has an annular groove on the side facing the cell housing, and one end of the cell housing facing the cover plate fits into the annular groove.

10. The single-cell battery with integrated series-parallel adjustable function according to claim 9, characterized in that, A layer of magnetic material is laid on the inner wall of the annular groove and on the surface of the end of the battery cell housing facing the cover plate.

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