Conversion device and battery

Abstract

The utility model relates to a conversion device and a battery. The conversion device comprises a first output piece, a second output piece, a third output piece and a conversion piece; the first output piece comprises a first output part, a first bearing part and a first rotating part; the second output piece comprises a second output part and a second bearing part; the third output piece comprises a third output part and a second rotating part; the conversion piece comprises a first movable part and a second movable part; when the conversion device is in the first state, the first rotating part is connected with the second output part, and when the conversion device is in the second state, the second rotating part is connected with the first bearing part or the second bearing part; when at least one of the first rotating part, the second rotating part, the first movable part and the second movable part is controlled to rotate and drives the other parts to rotate, the conversion device is switched between the first state and the second state. The application scenes of the conversion device and the battery provided by the utility model are diversified.

Description

Technical Field

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

[0002] Batteries have become widely popular due to their superior fast charging, long life, long battery life, high cost performance, and safety, and are widely used in various fields.

[0003] A conventional battery includes several battery modules, which are connected in series or in parallel. After the battery modules are connected, the connection form between the battery modules is fixed, and the application scenario is single. Utility Model Content

[0004] Based on this, it is necessary to provide a conversion device and a battery that can improve application scenarios to address the above problems.

[0005] A conversion device having a first state and a second state, the conversion device comprising a first output element, a second output element, a third output element and a conversion element;

[0006] The first output member includes a first output portion, a first receiving portion fixedly connected to the first output portion, and a first rotating portion rotatably connected to the first output portion; the second output member includes a second output portion and a second receiving portion fixedly connected to the second output portion; the third output member includes a third output portion and a second rotating portion rotatably connected to the third output portion; the conversion member includes a first movable portion and a second movable portion, the first movable portion being rotatably connected to the first rotating portion and the second movable portion, and the second movable portion being rotatably connected to the second rotating portion;

[0007] When the conversion device is in the first state, the first rotating part is connected to the second output part, and the second rotating part is separated from the first receiving part and the second receiving part. When the conversion device is in the second state, the first rotating part is separated from the second output part, and the second rotating part is connected to the first receiving part or the second receiving part. When at least one of the first rotating part, the second rotating part, the first movable part, and the second movable part is controlled to rotate and drives the others to rotate, the conversion device switches between the first state and the second state.

[0008] The first output element, the second output element and the third output element are all conductive elements; and the conversion element is an insulating element.

[0009] In some embodiments, there are two third output members, and opposite ends of the second movable portion are rotatably connected to two second rotating portions in two groups of the third output members respectively;

[0010] When the conversion device is in the second state, the second rotating portion of one of the third output members is in contact with the first receiving portion, and the second rotating portion of the other third output member is in contact with the second receiving portion;

[0011] When at least one of the first rotating part, the two second rotating parts, the first movable part and the second movable part is controlled to drive the others to rotate, the conversion device switches between the first state and the second state.

[0012] In some embodiments, the conversion device further includes a driving member configured to drive the second rotating portion to rotate until the second rotating portion engages with the first receiving portion or the second receiving portion.

[0013] In some embodiments, the conversion device includes a low-voltage terminal, the driving member is a coil, the coil is electrically connected to the low-voltage terminal, and the coil is energized to attract the second rotating part to rotate.

[0014] In some embodiments, the first output member further includes a first torsion spring portion and a first rotating shaft portion, the first rotating portion is rotatably connected to the first output portion via the first rotating shaft portion, the first torsion spring portion is mounted on the first rotating shaft portion and abuts against the first output portion; the third output member further includes a second torsion spring portion and a second rotating shaft portion, the second rotating portion is rotatably connected to the third output portion via the second rotating shaft portion, the second torsion spring portion is mounted on the second rotating shaft portion and abuts against the third output portion;

[0015] When the coil is de-energized, the first torsion spring portion drives the first rotating portion to rotate and connect with the second output portion, and the second torsion spring portion drives the second rotating portion to rotate and separate from the first receiving portion or the second receiving portion.

[0016] In some embodiments, the conversion device further includes a support seat and a mounting shaft, the mounting shaft is mounted on the support seat, and the coil is sleeved on the mounting shaft.

[0017] In some embodiments, the receiving portion is provided with a first arc-shaped notch, the second output portion is provided with a second arc-shaped notch, and the second receiving portion is provided with a third arc-shaped notch; the first rotating portion and the second rotating portion are respectively provided with a first arc-shaped surface and a second arc-shaped surface;

[0018] When the first rotating part and the second output part are in contact, the first arcuate surface is in contact with the surface defining the second arcuate gap; when the second rotating part and the first receiving part are in contact, the second arcuate surface is in contact with the surface defining the first arcuate gap; when the second rotating part and the second receiving part are in contact, the second arcuate surface is in contact with the surface defining the third arcuate gap.

[0019] In some embodiments, the conversion device further includes a box, the box is an insulating element, and the box has a receiving cavity, and the first output component, the second output component, the third output component, and the conversion component are all received in the receiving cavity;

[0020] A first through hole, a second through hole and a third through hole are formed on the side wall of the box body, all of which are connected to the accommodating cavity. The first output part is arranged through the first through hole, the second output part is arranged through the second through hole, and the third output part is arranged through the third through hole.

[0021] In some embodiments, the conversion device further includes mounting feet spaced apart along the circumference of the box, and the mounting feet are used to install and fix the box.

[0022] A battery, comprising:

[0023] High-voltage box;

[0024] At least two battery modules arranged side by side along a preset direction; and

[0025] The conversion device according to any one of the above embodiments;

[0026] Among them, the positive pole of the first battery module is electrically connected to the positive pole of the high-voltage box, and the negative pole of the last battery module is connected to the negative pole of the high-voltage box; in every two adjacent battery modules, the negative pole of the upper battery module is connected to the first output part, the positive pole of the next battery module is connected to the second output part, and the third output part is connected to the positive pole or negative pole of the high-voltage box.

[0027] The aforementioned conversion device and battery, by providing a first output element, a second output element, a third output element, and a conversion element, cooperate to switch the conversion device between a first state and a second state. When multiple battery modules are connected using the conversion device, the switching between the two states of the conversion device can be used to adjust the connection relationship between the battery modules in series or parallel, thus providing diverse application scenarios and a wide range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1Schematic diagram of the structure of the conversion device in one embodiment of the present application when it is in the first state;

[0029] Figure 2 Schematic diagram of the structure of the conversion device in one embodiment of the present application when it is in the second state;

[0030] Figure 3 This is a schematic diagram of the connection between the conversion device, the high-voltage box, and three battery modules when the conversion device has a third output element in one embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the connection between the conversion device, the high-voltage box and three battery modules when the conversion device in one embodiment of the present application has two third output elements.

[0032] Figure Number:

[0033] 1000, battery;

[0034] 100. Conversion device; 200. Battery module; 300. High-voltage box;

[0035] 10. First output member; 20. Second output member; 30. Third output member; 40. Converter; 50. Coil; 60. Support base; 70. Mounting shaft; 80. Box; 90. Mounting foot; 110. Low-voltage terminal block;

[0036] 210, battery cell; 310, high voltage box positive electrode; 320, high voltage box negative electrode;

[0037] 11. First output portion; 12. First receiving portion; 121. First arcuate notch; 13. First rotating portion; 131. First arcuate surface; 14. First torsion spring portion; 15. First rotating shaft portion; 21. Second output portion; 211. Second arcuate notch; 22. Second receiving portion; 221. Third arcuate notch; 31. Third output portion; 32. Second rotating portion; 321. Second arcuate surface; 33. Second torsion spring portion; 34. Second rotating shaft portion; 41. First movable portion; 42. Second movable portion; 81. Bottom plate;

[0038] X, preset direction. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the 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, and therefore should not be understood as a limitation on the present application.

[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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0042] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; and can refer to the internal communication between two components or the interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0045] Please also refer to Figures 1 to 3 The present application provides a conversion device 100 for switching different circuits to achieve series or parallel connection of multiple battery modules 200.

[0046] The conversion device 100 includes a first output member 10, a second output member 20, a third output member 30, and a conversion member 40. The first output member 10 includes a first output portion 11, a first receiving portion 12 fixedly connected to the first output portion 11, and a first rotating portion 13 rotatably connected to the first output portion 11. The second output member 20 includes a second output portion 21 and a second receiving portion 22 fixedly connected to the second output portion 21. The third output member 30 includes a third output portion 31 and a second rotating portion 32 rotatably connected to the third output portion 31. The conversion member 40 includes a first movable portion 41 and a second movable portion 42. The first movable portion 41 is rotatably connected to the first rotating portion 13 and the second movable portion 42, and the second movable portion 42 is rotatably connected to the second rotating portion 32.

[0047] Specifically, the first output part 11, the second output part 21, the third output part 31, the first receiving part 12, the second receiving part 22, the first rotating part 13, the second rotating part 32, the first movable part 41 and the second movable part 42 can all be rod-shaped, block-shaped or other shapes, which can be set according to needs.

[0048] The first output element 10 , the second output element 20 and the third output element 30 are all conductive elements; the conversion element 40 is an insulating element.

[0049] The conversion device 100 has a first state and a second state. When at least one of the first rotating portion 13, the second rotating portion 32, the first movable portion 41, and the second movable portion 42 is controlled to rotate and drives the others to rotate, the conversion device 100 switches between the first and second states. In other words, rotation of at least one of the first rotating portion 13, the second rotating portion 32, the first movable portion 41, and the second movable portion 42 drives the others to rotate, thereby achieving the switch between the first and second states. The power for the controlled rotation of at least one of the first rotating portion 13, the second rotating portion 32, the first movable portion 41, and the second movable portion 42 can come from human power, magnetic attraction, magnetic repulsion, mechanical thrust, and the like.

[0050] When the conversion device 100 is in the first state, the first rotating portion 13 is connected to the second output portion 21, and the second rotating portion 32 is separated from the first receiving portion 12 and the second receiving portion 22. The first output portion 11 is electrically connected to the second output portion 21 through the first rotating portion 13. When the conversion device 100 is in the second state, the first rotating portion 13 is separated from the second output portion 21, and the second rotating portion 32 is connected to the first receiving portion 12 or the second receiving portion 22. When the second rotating portion 32 is connected to the first receiving portion 12, the first output portion 11 is electrically connected to the third output portion 31 through the first receiving portion 12 and the second rotating portion 32. When the second rotating portion 32 is connected to the second receiving portion 22, the second output portion 21 is electrically connected to the third output portion 31 through the second receiving portion 22 and the second rotating portion 32.

[0051] When multiple battery modules 200 are connected using the conversion device 100, the conversion device 100 can be switched between two states to adjust the connection relationship between the battery modules 200 in series or in parallel, which has diversified application scenarios and a wide range of uses.

[0052] Below, at least two battery modules 200 are arranged along a preset direction X, and each two adjacent battery modules 200 are connected between the positive and negative poles of the high-voltage box 300 through the conversion device 100. The output of voltage to the high-voltage box 300 is described as an example.

[0053] In this embodiment, the positive electrode of the first battery module 200 is electrically connected to the positive electrode 310 of the high-voltage box, and the negative electrode of the last battery module 200 is connected to the negative electrode 320 of the high-voltage box. In each two adjacent battery modules 200, the negative electrode of the previous battery module 200 is connected to the first output part 11, the positive electrode of the next battery module 200 is connected to the second output part 21, and the third output part 31 is connected to the positive electrode 310 or the negative electrode of the high-voltage box.

[0054] For example, when there are three battery modules 200 and two conversion devices 100, the three battery modules 200 arranged in the preset direction X are defined as the first battery module 200, the second battery module 200 and the third battery module 200, respectively. The conversion device 100 connecting the first battery module 200 and the second battery module 200 is defined as the first conversion device 100, and the conversion device 100 connecting the second battery module 200 and the third battery module 200 is defined as the second conversion device 100. The positive electrode of the first battery module 200 is electrically connected to the positive electrode 310 of the high-voltage box, the negative electrode of the first battery module 200 is connected to the first output part 11 of the first conversion device 100, the positive electrode of the second battery module 200 is connected to the second output part 21 of the first conversion device 100, the negative electrode of the second battery module 200 is connected to the first output part 11 of the second conversion device 100, the positive electrode of the third battery module 200 is connected to the second output part 21 of the second conversion device 100, the negative electrode of the third battery module 200 is connected to the negative electrode 320 of the high-voltage box, the third output part 31 of the first conversion device 100 is connected to the negative electrode 320 of the high-voltage box, and the third output part 31 of the second conversion device 100 is connected to the positive electrode 310 of the high-voltage box.

[0055] When each conversion device 100 is in the first state, the first output portion 11 and the second output portion 21 of each conversion device 100 are connected, and the first output portion 11 and the second output portion 21 of each conversion device 100 are disconnected from the third output portion 31, thereby achieving a series connection of the first battery module 200, the second battery module 200, and the third battery module 200, thereby outputting a higher voltage to the high-voltage box 300. When each conversion device 100 is in the second state, and the second rotating portion 32 of the first conversion device 100 is connected to the first receiving portion 12, and the second rotating portion 32 of the second conversion device 100 is connected to the second receiving portion 22, the first output portion 11 of the first conversion device 100 is connected to the third output portion 31, and the second output portion 21 of the second conversion device 100 is connected to the third output portion 31, thereby achieving a parallel connection of the first battery module 200 and the third battery module 200.

[0056] Please refer again Figure 1 and Figure 2 , and also see Figure 4In some optional embodiments, there are two third output members 30, and the opposite ends of the second movable part 42 are respectively rotatably connected to the two second rotating parts 32 in the two groups of third output members 30; when the conversion device 100 is in the second state, the second rotating part 32 of one third output member 30 is supported by the first receiving part 12, and the second rotating part 32 of the other third output member 30 is supported by the second receiving part 22; when at least one of the first rotating part 13, the two second rotating parts 32, the first movable part 41 and the second movable part 42 is controlled to drive the others to rotate, the conversion device 100 switches between the first state and the second state.

[0057] For example, the second rotating parts 32 of the two third output members 30 rotate under control, and drive the first movable part 41 , the second movable part 42 and the first rotating part 13 to rotate, so as to realize the switching between the first state and the second state of the switching device.

[0058] The following description continues with an example in which there are three battery modules 200 and two conversion devices 100 .

[0059] The two third output elements 30 in the same conversion device 100 are defined as a first third output element 30 and a second third output element 30. In this embodiment, the positive electrode of the first battery module 200 is electrically connected to the positive electrode 310 of the high-voltage box, the negative electrode of the first battery module 200 is connected to the first output portion 11 of the first conversion device 100, the positive electrode of the second battery module 200 is connected to the second output portion 21 of the first conversion device 100, the negative electrode of the second battery module 200 is connected to the first output portion 11 of the second conversion device 100, the positive electrode of the third battery module 200 is connected to the second output portion 21 of the second conversion device 100, and the negative electrode of the third battery module 200 is connected to the negative electrode 320 of the high-voltage box. The third output portion 31 of the first third output element 30 in the first and second conversion devices 100 is connected to the negative electrode 320 of the high-voltage box, and the third output portion 31 of the second output element in the first and second conversion devices 100 is connected to the positive electrode 310 of the high-voltage box.

[0060] When each conversion device 100 is in the first state, the first output portion 11 of each conversion device 100 is electrically connected to the second output portion 21, achieving a series connection of the first, second, and third battery modules 200, thereby outputting a higher voltage to the high-voltage box 300. When each conversion device 100 is in the second state, and the second rotating portion 32 of the first third output member 30 of each conversion device 100 is engaged with the first receiving portion 12, and the second rotating portion 32 of the second third output member 30 of each conversion device 100 is engaged with the second receiving portion 22, the first output portion 11 of each conversion device 100 is electrically connected to the third output portion 31 of the first third output member 30, and the second output portion 21 of each conversion device 100 is electrically connected to the third output portion 31 of the second third output member 30, achieving a parallel connection of the first, second, and third battery modules 200.

[0061] It can be seen that by setting two third output components 30 in the conversion device 100 and switching the state of the conversion device 100, a plurality of battery modules 200 can be connected in series or in parallel. In addition, as the operating time continues to lengthen, the differences between the battery modules 200 and the battery modules 200 continue to increase, resulting in a decrease in the performance of the battery 1000. When dealing with problems such as low consistency of the battery modules 200, the usual way to deal with it is to disassemble the battery modules 200 and balance the battery modules 200. In the present application, a conversion device 100 is provided to change the connection relationship of the plurality of battery modules 200, and the series connection between the battery modules 200 is changed to parallel connection, and the circulating current formed by the pressure difference between the battery modules 200 is used to balance the battery modules 200, thereby reducing the consistency difference between the battery modules 200 and improving the performance of the entire battery 1000.

[0062] Please refer again Figures 1 to 4 In some optional embodiments, the conversion device 100 further includes a driving member configured to drive the second rotating portion 32 to rotate until the second rotating portion 32 engages with the first receiving portion 12 or the second receiving portion 22. The provision of the driving member reduces manual intervention and simplifies the state switching of the conversion device 100.

[0063] As an example, the driving member may be a cylinder, an electric strut, a screw pair, etc., which may be specifically set according to requirements.

[0064] In some optional embodiments, the conversion device 100 includes a low-voltage terminal 110 , and the driving member is a coil 50 . The coil 50 is electrically connected to the low-voltage terminal 110 . The coil 50 is energized and attracts the second rotating part 32 to rotate.

[0065] Specifically, the high-voltage box 300 of the battery 1000 also includes a battery management system, and the low-voltage terminal 110 is electrically connected to the battery management system.

[0066] Taking the conversion device 100 having two third output elements 30 as an example, there are also two coils 50 corresponding one to one with the second rotating parts 32 of the two third output elements 30 . Each coil 50 is used to attract the corresponding second rotating part 32 to rotate when energized.

[0067] Taking the conversion device 100 as an example, with two coils 50 and two third output elements 30, when the battery management system controls the coils 50 to be energized, a magnetic field is generated around the coils 50, attracting the corresponding second rotating parts 32 to rotate until the second rotating part 32 of the first third output element 30 abuts the first receiving portion 12, and the second rotating part of the other third output element 30 abuts the second receiving portion 22. The rotation of the two second rotating parts 32 also drives the first movable part 41, the second movable part 42, and the first rotating part 13 to rotate, disengaging the first rotating part 13 from the first receiving portion 12, thereby disconnecting the first output element 10 from the second output element 20. The conversion device switches from the first state to the second state, and the battery modules 200 are connected in parallel.

[0068] By energizing the coil 50 to control the rotation of the second rotating portion 32, the coil 50 maintains its shape during the energization process, and the overall space occupied is also small, which helps to reduce the size of the conversion device 100. In addition, the coil 50 has a long service life, which also helps to extend the total operating time of the conversion device 100.

[0069] In some optional embodiments, the first output member 10 further includes a first torsion spring portion 14 and a first rotating shaft portion 15. The first rotating portion 13 is rotatably connected to the first output portion 11 via the first rotating shaft portion 15. The first torsion spring portion 14 is mounted on the first rotating shaft portion 15 and abuts against the first output portion 11. The third output member 30 further includes a second torsion spring portion 33 and a second rotating shaft portion 34. The second rotating portion 32 is rotatably connected to the third output portion 31 via the second rotating shaft portion 34. The second torsion spring portion 33 is mounted on the second rotating shaft portion 34 and abuts against the third output portion 31. When the coil 50 is de-energized, the first torsion spring portion 14 drives the first rotating portion 13 to rotate and engage with the second output portion 21, while the second torsion spring portion 33 drives the second rotating portion 32 to rotate and separate from the first receiving portion 12 or the second receiving portion 22.

[0070] Taking the conversion device 100 as an example, which has two coils 50 and two third output elements 30, when the battery management system control coil 50 is de-energized, both second rotating portions 32 rotate and automatically reset under the action of the corresponding second torsion spring portion 33. Simultaneously, the first rotating portion 13 also rotates under the action of the first torsion spring portion 14, causing the second rotating portion 32 of the first third output element 30 to separate from the first receiving portion 12 of the first output element 10, and the second rotating portion 32 of the second third output element 30 to separate from the second receiving portion 22 of the second output element 20. At this point, the first rotating portion 13 of the first output element 10 engages with the first receiving portion 12 of the second output element 20. At this point, the first output element 10 and the second output element 20 are electrically connected, the conversion device 100 switches from the second state to the first state, and the multiple battery modules 200 are connected in series.

[0071] By cooperating with the first torsion spring portion 14 and the second torsion spring portion 33 , the first state and the second state of the conversion device 100 are mutually exclusive states, thereby preventing multiple battery modules 200 from being connected in series and in parallel at the same time, thereby preventing the battery modules 200 from short-circuiting.

[0072] In some optional embodiments, the driving member further includes a support base 60 and a mounting shaft 70 , the mounting shaft 70 is mounted on the support base 60 , and the coil 50 is sleeved on the mounting shaft 70 to facilitate the installation of the coil 50 .

[0073] Specifically, there are multiple support bases 60 and they are arranged along the extension direction of the mounting shaft 70. The support bases 60 are provided with mounting holes. The mounting shaft 70 is passed through the mounting holes of all the support bases 60, and the coils 50 are sleeved on the mounting shaft 70. For example, if there are two coils 50, the two coils 50 are sleeved on opposite ends of the mounting shaft 70 respectively.

[0074] Among them, considering the installation space, the installation shaft 70 can be set to a straight shaft, a U-shaped shaft or a shaft of other shapes according to actual conditions.

[0075] In some optional embodiments, the receiving portion is provided with a first arcuate notch 121, the second output portion 21 is provided with a second arcuate notch 211, and the second receiving portion 22 is provided with a third arcuate notch 221. The first rotating portion 13 and the second rotating portion 32 are provided with a first arcuate surface 131 and a second arcuate surface 321, respectively. When the first rotating portion 13 and the second output portion 21 are engaged, the first arcuate surface 131 mates with the surface defining the second arcuate notch 211, thereby ensuring a large contact area between the first rotating portion 13 and the second output portion 21, thereby ensuring stable electrical communication between the first output member 10 and the second output member 20. When the second rotating portion 32 is engaged with the first receiving portion 12, the second arcuate surface 321 mates with the surface defining the first arcuate notch 121, thereby ensuring a large contact area between the second rotating portion 32 and the first receiving portion 12, thereby ensuring stable electrical communication between the first output member 10 and the third output member 30. When the second rotating portion 32 is connected to the second receiving portion 22, the second arc surface 321 is in contact with the surface defining the third arc notch 221 to ensure a larger contact area between the second rotating portion 32 and the second receiving portion 22, so that the third output member 30 and the second output member 20 can be stably connected.

[0076] In some optional embodiments, the conversion device 100 further includes a housing 80, which is an insulating element and has a housing cavity within which the first output member 10, the second output member 20, the third output member 30, and the conversion member 40 are housed. A first through hole, a second through hole, and a third through hole are defined on the sidewalls of the housing 80, each of which communicates with the housing cavity. The first output portion 11 is disposed through the first through hole, the second output portion 21 is disposed through the second through hole, and the third output portion 31 is disposed through the third through hole. This facilitates connection between the first and second output portions 11, 21 and the battery module 200, and facilitates connection between the third output portion 31 and the high-voltage box 300.

[0077] As an example, the accommodating cavity of the box body 80 may be an open cavity or a closed cavity.

[0078] As an example, the box body 80 has a bottom plate 81, all the support seats 60 are installed on the bottom plate 81, and the first output part 11, the first receiving part 12, the second output part 21, the second receiving part 22, and the third output part 31 are all installed on the bottom plate 81 through insulating columns.

[0079] In some optional embodiments, the conversion device 100 further includes mounting feet 90 spaced apart along the circumference of the box body 80, and the mounting feet 90 are used to mount and secure the box body 80. The mounting feet 90 are mounted and secured in the battery box by bolts or pins.

[0080] The present application also provides a battery 1000, which includes a battery box, a high-voltage box 300, at least two battery modules 200, and the conversion device 100 described in any of the above embodiments. The high-voltage box 300, all battery modules 200, and the conversion device 100 described in any of the above embodiments are all arranged in the battery box. All battery modules 200 are arranged side by side along a preset direction X, wherein the positive electrode of the first battery module 200 is electrically connected to the positive electrode 310 of the high-voltage box, and the negative electrode of the last battery module 200 is connected to the negative electrode 320 of the high-voltage box; in each pair of adjacent battery modules 200, the negative electrode of the upper battery module 200 is connected to the first output part 11, the positive electrode of the lower battery module 200 is connected to the second output part 21, and the third output part 31 is connected to the positive electrode 310 or the negative electrode of the high-voltage box.

[0081] The high-voltage box 300 is a component within the battery 1000 that receives and stores high voltage electricity and is capable of outputting high voltage electricity. The battery module 200 includes multiple battery cells 210, which are connected in series or in parallel to form the battery module 200. The detailed working process of the high-voltage box 300, the conversion device 100, and the multiple battery modules 200 has been described in detail above and will not be repeated here. The battery 1000 in this embodiment has the same benefits as any of the above-mentioned embodiments, so it will not be further described here.

[0082] In addition, it is worth mentioning that since the conversion device 100 is directly set in the battery box, when the user needs to switch the voltage, there is no need for an external DC / DC conversion device, which not only reduces the cost but also improves the efficiency of the battery 1000 in outputting energy.

[0083] The conversion device 100 and battery 1000 are configured with a first output element 10, a second output element 20, a third output element 30, and a conversion element 40. These elements cooperate to switch the conversion device 100 between a first state and a second state. When multiple battery modules 200 are connected using the conversion device 100, the switching between these two states can be used to adjust the connection between the battery modules 200, either in series or in parallel. This allows for diverse application scenarios and a wide range of uses.

[0084] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A conversion device, characterized in that: The conversion device has a first state and a second state, and the conversion device includes a first output member (10), a second output member (20), a third output member (30) and a conversion member (40); The first output member (10) includes a first output portion (11), a first receiving portion (12) fixedly connected to the first output portion (11), and a first rotating portion (13) rotatably connected to the first output portion (11); the second output member (20) includes a second output portion (21) and a second receiving portion (22) fixedly connected to the second output portion (21); the third output member (30) includes a third output portion (31) and a second rotating portion (32) rotatably connected to the third output portion (31); the conversion member (40) includes a first movable portion (41) and a second movable portion (42), the first movable portion (41) being rotatably connected to the first rotating portion (13) and the second movable portion (42), and the second movable portion (42) being rotatably connected to the second rotating portion (32); When the conversion device is in the first state, the first rotating part (13) is connected to the second output part (21), and the second rotating part (32) is separated from the first receiving part (12) and the second receiving part (22); when the conversion device is in the second state, the first rotating part (13) is separated from the second output part (21), and the second rotating part (32) is connected to the first receiving part (12) or the second receiving part (22); when at least one of the first rotating part (13), the second rotating part (32), the first movable part (41) and the second movable part (42) is controlled to rotate and drives the others to rotate, the conversion device switches between the first state and the second state; The first output element (10), the second output element (20) and the third output element (30) are all conductive elements; and the conversion element (40) is an insulating element.

2. The conversion device according to claim 1, characterized in that There are two third output members (30), and opposite ends of the second movable portion (42) are respectively rotatably connected to the two second rotating portions (32) in the two groups of the third output members (30); When the conversion device is in the second state, the second rotating portion (32) of one of the third output members (30) is in contact with the first receiving portion (12), and the second rotating portion (32) of the other third output member (30) is in contact with the second receiving portion (22); When at least one of the first rotating part (13), the two second rotating parts (32), the first movable part (41) and the second movable part (42) is controlled to drive the others to rotate, the conversion device switches between the first state and the second state.

3. The conversion device according to claim 1, characterized in that The conversion device further comprises a driving member configured to drive the second rotating portion (32) to rotate until the second rotating portion (32) is engaged with the first receiving portion (12) or the second receiving portion (22).

4. The conversion device according to claim 3, characterized in that The conversion device comprises a low-voltage terminal (110), the driving member is a coil (50), the coil (50) is electrically connected to the low-voltage terminal (110), and the coil (50) is energized to attract the second rotating part (32) to rotate.

5. The conversion device according to claim 4, characterized in that: The first output member (10) further comprises a first torsion spring portion (14) and a first rotating shaft portion (15), the first rotating portion (13) being rotationally connected to the first output portion (11) via the first rotating shaft portion (15), the first torsion spring portion (14) being mounted on the first rotating shaft portion (15) and abutting against the first output portion (11); the third output member (30) further comprises a second torsion spring portion (33) and a second rotating shaft portion (34), the second rotating portion (32) being rotationally connected to the third output portion (31) via the second rotating shaft portion (34), the second torsion spring portion (33) being mounted on the second rotating shaft portion (34) and abutting against the third output portion (31); When the coil (50) is powered off, the first torsion spring portion (14) drives the first rotating portion (13) to rotate and connect with the second output portion (21), and the second torsion spring portion (33) drives the second rotating portion (32) to rotate and separate from the first connecting portion (12) or the second connecting portion (22).

6. The conversion device according to claim 4, characterized in that The conversion device further comprises a support seat (60) and a mounting shaft (70), wherein the mounting shaft (70) is mounted on the support seat (60), and the coil (50) is sleeved on the mounting shaft (70).

7. The conversion device according to claim 1, characterized in that The receiving portion is provided with a first arc-shaped notch (121), the second output portion (21) is provided with a second arc-shaped notch (211), and the second receiving portion (22) is provided with a third arc-shaped notch (221); the first rotating portion (13) and the second rotating portion (32) are respectively provided with a first arc-shaped surface (131) and a second arc-shaped surface (321); When the first rotating part (13) and the second output part (21) are in contact, the first arcuate surface (131) is in contact with the surface defining the second arcuate notch (211); when the second rotating part (32) and the first receiving part (12) are in contact, the second arcuate surface (321) is in contact with the surface defining the first arcuate notch (121); when the second rotating part (32) and the second receiving part (22) are in contact, the second arcuate surface (321) is in contact with the surface defining the third arcuate notch (221).

8. The conversion device according to any one of claims 1 to 7, characterized in that: The conversion device further comprises a box (80), the box (80) being an insulating element, and the box (80) having a receiving cavity, wherein the first output component (10), the second output component (20), the third output component (30) and the conversion component (40) are all received in the receiving cavity; A first through hole, a second through hole, and a third through hole are provided on the side wall of the box body (80), all of which are connected to the accommodating cavity; the first output part (11) is provided through the first through hole; the second output part (21) is provided through the second through hole; and the third output part (31) is provided through the third through hole.

9. The conversion device according to claim 8, characterized in that The conversion device further comprises mounting feet (90) arranged at intervals along the circumference of the box body (80), and the mounting feet (90) are used to install and fix the box body (80).

10. A battery, characterized in that: The battery comprises: A high-voltage box (300) having a high-voltage box positive electrode (310) and a high-voltage box negative electrode (320); At least two battery modules (200) arranged side by side along a preset direction (X); and The conversion device according to any one of claims 1 to 9 above; The positive electrode of the first battery module (200) is electrically connected to the positive electrode (310) of the high-voltage box, and the negative electrode of the last battery module (200) is connected to the negative electrode (320) of the high-voltage box; in each of two adjacent battery modules (200), the negative electrode of the previous battery module (200) is connected to the first output part (11), the positive electrode of the next battery module (200) is connected to the second output part (21), and the third output part (31) is connected to the positive electrode (310) or the negative electrode of the high-voltage box.

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