Conversion device and battery

Abstract

The utility model provides a conversion device and a battery, and relates to the technical field of batteries. In the conversion device, an accommodating space is arranged in a shell; the first connecting assembly and the second connecting assembly are connected with the high-voltage box. And the third connecting assembly is connected with the positive electrode connecting end of one battery module. And the fourth connecting assembly is connected with the negative electrode connecting end of the other battery module. The connecting rod mechanism is movably arranged in the accommodating space; when the connecting rod mechanism is in the first state, the connecting rod mechanism connects and conducts the third connecting assembly and the fourth connecting assembly; when the connecting rod mechanism is in the second state, the connecting rod mechanism connects and conducts the first connecting assembly and the third connecting assembly, and connects and conducts the second connecting assembly and the fourth connecting assembly. The battery provided by the utility model adopts the conversion device. According to the conversion device and the battery provided by the utility model, the problems that the battery module of the battery is poor in consistency and high in adjustment difficulty and the battery output voltage is single in fixed scene application can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a conversion device and a battery. Background Art

[0002] With the rapid development of the new energy industry, the application areas of lithium batteries are also expanding. Conventional battery packs are composed of several battery modules connected in series. As the battery pack operation time continues to increase, the differences between modules continue to increase, thus affecting the performance of the entire battery pack. In addition, after the modules are connected in series, the connection form between the modules is fixed, the output voltage of the entire battery box is also fixed, and the application scenario is single.

[0003] When dealing with problems such as low module consistency, the battery pack needs to be removed and the modules need to be recharged and balanced. When the user needs to switch the battery voltage at a later stage (such as switching from a high-voltage platform to a low-voltage platform), an external DC / DC converter is required. This method increases the user's usage cost and reduces the output energy efficiency of the battery box. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the problems in the prior art of poor consistency of battery modules of batteries, high difficulty in adjustment, and single application scenario of fixed battery output voltage.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The utility model provides a conversion device, which is applied to a battery. The battery includes a high-voltage box and a plurality of battery modules. Each of the battery modules has a positive electrode connection terminal and a negative electrode connection terminal. The conversion device includes:

[0007] A housing having a containing space therein;

[0008] A first connecting component and a second connecting component are arranged in the accommodating space and are both used to connect the high-voltage box;

[0009] A third connecting component, disposed in the accommodating space and used to connect the positive electrode connecting end of one of the battery modules;

[0010] a fourth connecting component, disposed in the accommodating space and used for connecting the negative electrode connecting terminal of another battery module;

[0011] A connecting rod mechanism is movably arranged in the accommodating space, and the connecting rod mechanism has a first state and a second state; when the connecting rod mechanism is in the first state, the connecting rod mechanism connects and conducts the third connecting component and the fourth connecting component; when the connecting rod mechanism is in the second state, the connecting rod mechanism connects and conducts the first connecting component and the third connecting component, and connects and conducts the second connecting component and the fourth connecting component.

[0012] The beneficial effects of the conversion device provided by the utility model compared with the prior art include:

[0013] When the conversion device is applied to a battery, the battery modules are connected through the conversion device. In the conversion device, the connection mode can be switched between the first connection component, the second connection component, the third connection component and the fourth connection component by switching the connecting rod mechanism between the first state and the second state; wherein, in the first state, the third connection component and the fourth connection component are connected and turned on, so that the two battery modules can be connected in series; and in the second state, the first connection component and the third connection component can be connected and turned on, and the second connection component and the fourth connection component can be connected and turned on, thereby realizing the parallel connection of the two battery modules. Therefore, through the activity of the connecting rod mechanism, the connection form of the battery module can be adjusted according to actual needs, so that the battery module can be switched between series connection and parallel connection, which can not only increase the output form of the battery, but also when the battery voltage needs to be switched, there is no need to set up an additional external conversion device; and, when the consistency of the module is reduced, it is not necessary to remove the battery module from the battery, and adjusting the connection relationship between the battery modules can achieve the consistency adjustment of multiple battery modules, thereby solving the problem of poor consistency. Based on this, the conversion device provided by the utility model can improve the problems in the prior art of poor consistency of battery modules, high difficulty in adjustment, and single application scenario of fixed battery output voltage.

[0014] Optionally, the conversion device also includes a driving mechanism and an elastic member; the elastic member is connected to the connecting rod mechanism; the driving mechanism is used to apply a force to the connecting rod mechanism so that the connecting rod mechanism switches from the first state to the second state and deforms the elastic member; the elastic member is used to drive the connecting rod mechanism to switch from the second state to the first state when the driving mechanism withdraws the force.

[0015] Optionally, the connecting rod mechanism includes a linkage mechanism, a first rotating member, a second rotating member and a third rotating member; the first rotating member, the second rotating member and the third rotating member are all connected to the linkage mechanism so that the first rotating member, the second rotating member and the third rotating member move synchronously;

[0016] The first rotating member is rotatably connected to the third connecting component and is used to selectively connect and conduct the third connecting component and the fourth connecting component;

[0017] The second rotating member is rotatably connected to the first connecting component, and is used to selectively connect and conduct the first connecting component and the third connecting component;

[0018] The third rotating member is rotatably connected to the second connecting component, and is used to selectively connect and conduct the second connecting component and the fourth connecting component;

[0019] The driving mechanism is used to apply a force to at least one of the first rotating member, the second rotating member and the third rotating member; and the elastic member is correspondingly arranged on at least one of the first rotating member, the second rotating member and the third rotating member.

[0020] Optionally, the elastic member is a torsion spring, and the elastic member is disposed on a rotation axis of at least one of the first rotating member, the second rotating member and the third rotating member.

[0021] Optionally, the driving mechanism includes a shaft and a coil; the shaft is fixedly disposed in the accommodating space, and the shaft has two driving parts, the two driving parts are respectively arranged close to the second rotating member and the third rotating member, and the two driving parts are both sleeved with the coil, and the coil is used to apply a force to the second rotating member and the third rotating member when energized.

[0022] Optionally, the fourth connecting component is provided with a first bridging member adapted to the first rotating member, the first bridging member is provided with a first groove, and when the first rotating member is connected and conducted with the first bridging member, at least a portion of the first rotating member is accommodated in the first groove;

[0023] And / or, the third connecting component is provided with a second bridging member adapted to the second rotating member, the second bridging member is provided with a second groove, and when the second rotating member is connected and conducted with the second bridging member, at least a portion of the second rotating member is accommodated in the second groove;

[0024] And / or, the fourth connecting component is also provided with a third lap member adapted to the third rotating member, and the third lap member is provided with a third groove. When the third rotating member is connected to the third lap member and is conductive, at least a portion of the third rotating member is accommodated in the third groove.

[0025] Optionally, the linkage mechanism includes a first connecting rod and a second connecting rod, and both ends of the first connecting rod are rotatably connected to the second rotating member and the third rotating member respectively; one end of the second connecting rod is rotatably connected to the first connecting rod, and the other end is rotatably connected to the first rotating member.

[0026] Optionally, the first connecting assembly has a first terminal for connecting to the high-voltage box, and the first terminal passes through the peripheral wall of the shell and extends to the outside of the shell;

[0027] The second connecting assembly has a second terminal for connecting to the high-voltage box, and the second terminal extends through the peripheral wall of the shell to the outside of the shell;

[0028] The third connecting assembly has a third terminal for connecting to the high-voltage box, and the third terminal extends through the peripheral wall of the shell to the outside of the shell;

[0029] The fourth connecting assembly has a fourth terminal for connecting to the high-voltage box, and the fourth terminal passes through the peripheral wall of the shell and extends to the outside of the shell.

[0030] Optionally, the conversion device further comprises a mounting base, wherein the mounting base is fixedly disposed on the outer side of the shell, and the mounting base is used to be mounted on a box body of the battery.

[0031] A battery comprises the above-mentioned conversion device.

[0032] The battery provided by the utility model adopts the above-mentioned conversion device. The beneficial effects of the battery relative to the prior art are the same as the beneficial effects of the above-mentioned conversion device relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is one of the structural schematic diagrams of the conversion device provided in the first embodiment of the present application;

[0035] Figure 2 This is the second structural schematic diagram of the conversion device provided in the first embodiment of the present application;

[0036] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0037] Figure 4 This is a schematic diagram of a battery provided in the second embodiment of the present application.

[0038] Icons: 10-battery; 11-high voltage box; 12-battery module; 13-conversion device; 100-housing; 110-accommodation space; 120-mounting base; 130-low voltage terminal; 200-first connecting assembly; 210-first terminal; 300-second connecting assembly; 310-second terminal; 400-third connecting assembly; 410-second bridge piece; 411-second groove; 420-third terminal; 500- Fourth connecting component; 510-first bridging member; 511-first groove; 520-third bridging member; 521-third groove; 530-fourth terminal; 600-connecting rod mechanism; 610-linking mechanism; 611-first connecting rod; 612-second connecting rod; 620-first rotating member; 630-second rotating member; 640-third rotating member; 700-driving mechanism; 710-shaft rod; 711-driving part; 720-coil. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does 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, it cannot be understood as a limitation on the present utility model.

[0043] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0045] First embodiment

[0046] See also Figure 1 In this embodiment, a conversion device 13 is provided, which is applied to the battery 10 and is used to connect to the battery module 12. The conversion device 13 is used to switch the connection form of the battery module 12 in the battery 10, thereby improving the problems in the prior art that the battery module 12 of the battery 10 has poor consistency, high adjustment difficulty, and a single application scenario for the fixed output voltage of the battery 10.

[0047] The battery 10 includes a high voltage box 11 and a plurality of battery modules 12, each of which has a positive connection terminal and a negative connection terminal. The positive connection terminal and the negative connection terminal are used to connect the battery module 12 to a circuit, so as to facilitate the battery module 12 to output electrical energy.

[0048] In this embodiment, please refer to Figure 1 and Figure 2The conversion device 13 includes a housing 100, a first connecting assembly 200, a second connecting assembly 300, a third connecting assembly 400, a fourth connecting assembly 500 and a connecting rod mechanism 600. A housing 110 is provided in the housing 100. The first connecting assembly 200 and the second connecting assembly 300 are provided in the housing 110 and are both used to connect the high-voltage box 11. The third connecting assembly 400 is provided in the housing 110 and is used to connect the positive electrode connection terminal of one of the battery modules 12. The fourth connecting assembly 500 is provided in the housing 110 and is used to connect the negative electrode connection terminal of another battery module 12. The connecting rod mechanism 600 is movably disposed in the accommodating space 110, and the connecting rod mechanism 600 has a first state and a second state; when the connecting rod mechanism 600 is in the first state, the connecting rod mechanism 600 connects and conducts the third connecting component 400 and the fourth connecting component 500; at the same time, the first connecting component 200 and the third connecting component 400 are disconnected, and the second connecting component 300 and the fourth connecting component 500 are disconnected, and at this time, the two battery modules 12 are in a series form. When the connecting rod mechanism 600 is in the second state, the connecting rod mechanism 600 connects and conducts the first connecting component 200 and the third connecting component 400, and connects and conducts the second connecting component 300 and the fourth connecting component 500; at the same time, the third connecting component 400 and the fourth connecting component 500 are disconnected, and the two battery modules 12 are in a parallel form.

[0049] in, Figure 1 The link mechanism 600 of the conversion device 13 shown in FIG. 1 is in a first state; Figure 2 The link mechanism 600 of the conversion device 13 shown in FIG. 1 is in the second state.

[0050] As described above, when the battery modules 12 are connected through the conversion device 13, in the conversion device 13, the connection mode can be switched between the first connection component 200, the second connection component 300, the third connection component 400 and the fourth connection component 500 by switching the connecting rod mechanism 600 between the first state and the second state. In the first state, the third connection component 400 and the fourth connection component 500 are connected and turned on, so that the two battery modules 12 can be connected in series; and in the second state, the first connection component 200 and the third connection component 400 can be connected and turned on, and the second connection component 300 and the fourth connection component 500 can be connected and turned on, thereby realizing the parallel connection of the two battery modules 12. Therefore, through the activity of the connecting rod mechanism 600, the connection form of the battery module 12 can be adjusted according to actual needs, so that the battery module 12 can be switched between series and parallel, which can not only increase the output form of the battery 10, but also eliminate the need to set up an additional external conversion device when the battery 10 voltage needs to be switched; and, when the consistency of the module is reduced, it is not necessary to remove the battery module 12 from the battery 10, and adjusting the connection relationship between the battery modules 12 can achieve the consistency of multiple battery modules 12. Adjustment can be achieved, thereby solving the problem of poor consistency. Based on this, the conversion device 13 provided by the utility model can improve the problems of poor consistency of the battery module 12 of the battery 10 in the prior art, high difficulty in adjustment, and single application of the fixed output voltage of the battery 10.

[0051] It should be noted that, in general, the link mechanism 600 in the conversion device 13 is in the first state, so that the two battery modules 12 are in a state of series connection. In the case of switching requirements, a force can be applied to the link mechanism 600, so that the link mechanism 600 is adjusted to the second state, thereby adjusting the two battery modules 12 to a state of parallel connection.

[0052] Generally, the battery 10 has a plurality of battery modules 12, based on which a plurality of conversion devices 13 can be provided in the battery 10. A conversion device 13 can be provided between any two battery modules 12 to adjust the connection mode. Figure 4In the example, there are three battery modules 12 and two conversion devices 13. The positive connection end of the battery module 12 on the right is connected to the high-voltage box 11, and the negative connection end is connected to the conversion device 13; the positive connection end of the battery module 12 in the middle is connected to the conversion device 13, and the negative connection end is connected to another conversion device 13; the positive connection end of the battery module 12 on the left is connected to the conversion device 13, and the negative connection end is connected to the high-voltage box 11. Generally, the three battery modules 12 are in a series state, that is, the connecting rod mechanisms 600 in the two conversion devices 13 are in the first state; and when the state of the connecting rod mechanisms 600 in one or two conversion devices 13 needs to be adjusted, the corresponding operation can be performed on the connecting rod mechanisms 600 that need to switch states.

[0053] In this embodiment, the conversion device 13 further includes a driving mechanism 700 and an elastic member (not shown); the elastic member is connected to the connecting rod mechanism 600; the driving mechanism 700 is used to apply a force to the connecting rod mechanism 600 so that the connecting rod mechanism 600 switches from the first state to the second state and deforms the elastic member; the elastic member is used to drive the connecting rod mechanism 600 to switch from the second state to the first state when the driving mechanism 700 withdraws the force. When the driving mechanism 700 does not apply a force to the connecting rod mechanism 600, the connecting rod mechanism 600 is in the first state, and the elastic member is in a relaxed state at this time; and when the driving mechanism 700 applies a force to the connecting rod mechanism 600, the elastic member can realize the accumulation of elastic potential energy during the operation of the connecting rod mechanism 600, so that when the driving mechanism 700 withdraws the force, the elastic potential energy accumulated by the elastic member drives the connecting rod mechanism 600 to return to the original state.

[0054] Among them, by setting the driving mechanism 700 and the elastic member, the state switching of the conversion device 13 can be set to the form of intelligent control, which is convenient for quickly and efficiently adjusting the connection form of the battery module 12 in the battery 10. It should be understood that in other embodiments, the movement of the connecting rod mechanism 600 can also be achieved in other ways, for example, an operating handle for operating the movement of the connecting rod mechanism 600 is formed on the outside of the housing 100.

[0055] In this embodiment, the link mechanism 600 includes a linkage mechanism 610, a first rotating member 620, a second rotating member 630 and a third rotating member 640. The first rotating member 620, the second rotating member 630 and the third rotating member 640 are all connected to the linkage mechanism 610 so that the first rotating member 620, the second rotating member 630 and the third rotating member 640 move synchronously. The first rotating member 620 is rotatably connected to the third connecting assembly 400, and is used to selectively connect and conduct the third connecting assembly 400 and the fourth connecting assembly 500. The second rotating member 630 is rotatably connected to the first connecting assembly 200, and is used to selectively connect and conduct the first connecting assembly 200 and the third connecting assembly 400. The third rotating member 640 is rotatably connected to the second connecting assembly 300, and is used to selectively connect and conduct the second connecting assembly 300 and the fourth connecting assembly 500. The driving mechanism 700 is used to apply a force to at least one of the first rotating member 620 , the second rotating member 630 and the third rotating member 640 ; and an elastic member is correspondingly disposed on at least one of the first rotating member 620 , the second rotating member 630 and the third rotating member 640 .

[0056] By controlling the rotation of the first rotating member 620, the second rotating member 630 and the third rotating member 640, the connection form of the first connecting component 200, the second connecting component 300, the third connecting component 400 and the fourth connecting component 500 can be adjusted, which can save the space occupied by the connecting rod mechanism 600 in the accommodating space 110 and facilitate the control of the first rotating member 620, the second rotating member 630 and the third rotating member 640.

[0057] It should be understood that in other embodiments of the present application, other moving methods may also be used to adjust the connection relationship between the first connecting component 200, the second connecting component 300, the third connecting component 400 and the fourth connecting component 500. For example, the connection relationship between the first connecting component 200, the second connecting component 300, the third connecting component 400 and the fourth connecting component 500 may be adjusted by translating the moving parts.

[0058] In the case where the connection relationship between the first connecting assembly 200, the second connecting assembly 300, the third connecting assembly 400 and the fourth connecting assembly 500 is adjusted by rotation, optionally, the elastic member is a torsion spring, and the elastic member is provided on the rotation axis of at least one of the first rotating member 620, the second rotating member 630 and the third rotating member 640. Preferably, a torsion spring is provided on the rotation axis of the first rotating member 620, the second rotating member 630 and the third rotating member 640 to facilitate the reset of the first rotating member 620, the second rotating member 630 and the third rotating member 640. Of course, in the case where a torsion spring is provided on one or two of them, the synchronous reset of the first rotating member 620, the second rotating member 630 and the third rotating member 640 can also be achieved through the linkage of the linkage mechanism 610.

[0059] In other embodiments, the setting positions of the first rotating member 620, the second rotating member 630 and the third rotating member 640 can also be adjusted. For example, the first rotating member 620 can be set on the third connecting component 400; the second rotating member 630 can also be set on the third connecting component 400; the third rotating member 640 can also be set on the fourth connecting component 500.

[0060] In addition, in other embodiments, the setting mode of the elastic member may also adopt other setting modes. Herein, the first rotating member 620 is taken as an example for explanation. For example, an elastic member is set at the end of the first rotating member 620, and when the first rotating member 620 overlaps and cooperates with the third connecting component 400, the elastic member is compressed by the first rotating member 620 and the third connecting component 400, so that the elastic member produces elastic deformation; and after the force of the driving mechanism 700 is withdrawn, the elastic member recovers the deformation to realize the ejection of the first rotating member 620, and the disconnection of the second connecting component 300 and the third connecting component 400 is realized.

[0061] Of course, in some other embodiments, the elastic member may be omitted, and the connecting rod mechanism 600 may be switched between the first state and the second state only by the driving mechanism 700. For example, the driving mechanism 700 may be a motor that can rotate forward and reverse, and the connecting rod mechanism 600 may be switched between the two states by the forward and reverse rotation of the motor.

[0062] Optionally, please refer to Figure 2 and Figure 3In this embodiment, the driving mechanism 700 includes a shaft 710 and a coil 720; the shaft 710 is fixedly disposed in the accommodating space 110, and the shaft 710 has two driving parts 711, the two driving parts 711 are respectively disposed near the second rotating member 630 and the third rotating member 630, and the two driving parts 711 are sleeved with a coil 720, and the coil 720 is used to apply a force to the second rotating member 630 and the third rotating member 640 when powered. When the coil 720 is powered, the coil 720 on the driving part 711 forms an electromagnet, which can apply a magnetic adsorption force to the second rotating member 630 and the third rotating member 640, so as to drive the second rotating member 630 and the third rotating member 640 to rotate. In order to facilitate the connection of the coil 720 to the circuit, a low-voltage terminal 130 is also provided on the housing 100, and the low-voltage terminal 130 is electrically connected to the coil 720, and the low-voltage terminal 130 is also connected to a control device, and the control device is used to realize the power on and off of the coil 720. Based on this, by controlling the power on and off of the coil 720 through the control device, the intelligent control of the connecting rod mechanism 600 can be realized, which is convenient for operation.

[0063] Among them, Figure 1 As shown, one of the driving parts 711 is arranged on the right side of the second rotating member 630, and the other driving part 711 is also arranged on the right side of the third rotating member 640. Therefore, when a force is applied to the second rotating member 630 and the third rotating member 640, the second rotating member 630 and the third rotating member 640 can be made to rotate synchronously.

[0064] It should be understood that in other embodiments of the present application, corresponding driving parts 711 and coils 720 may be provided on the first rotating member 620, the second rotating member 630 and the third rotating member 640; or, the driving part 711 and the coil 720 may be provided only on one side of the second rotating member 630 or the third rotating member 640.

[0065] In this embodiment, the fourth connection component 500 is provided with a first bridging member 510 adapted to the first rotating member 620, and a first groove 511 is provided on the first bridging member 510. When the first rotating member 620 is connected to the first bridging member 510 and is turned on, at least a portion of the first rotating member 620 is accommodated in the first groove 511. And / or, the third connection component 400 is provided with a second bridging member 410 adapted to the second rotating member 630, and a second groove 411 is provided on the second bridging member 410. When the second rotating member 630 is connected to the second bridging member 410 and is turned on, at least a portion of the second rotating member 630 is accommodated in the second groove 411. And / or, the fourth connecting component 500 is also provided with a third connecting member 520 adapted to the third rotating member 640, and a third groove 521 is opened on the third connecting member 520. When the third rotating member 640 is connected to the third connecting member 520 and is conductive, at least part of the third rotating member 640 is accommodated in the third groove 521.

[0066] The first lap joint 510 and the first groove 511 are used as an example for explanation. When the first rotating member 620 cooperates with the first lap joint 510, the first rotating member 620 is accommodated in the first groove 511. The cooperation between the first groove 511 and the first rotating member 620 can improve the stability of the cooperation between the first rotating member 620 and the first lap joint 510. In addition, in this embodiment, the outer contour of the first rotating member 620 is at least partially adapted to the bottom wall of the first groove 511, so that the first rotating member 620 and the first groove 511 can be overlapped in a surface-to-surface contact manner, which can increase the current flow area.

[0067] In addition, “and / or” means that, among the first bridging member 510 , the second bridging member 410 , and the third bridging member 520 , only one or two of them may be provided, or all three may be provided.

[0068] In this embodiment, the linkage mechanism 610 includes a first link 611 and a second link 612, wherein both ends of the first link 611 are rotatably connected to the second rotating member 630 and the third rotating member 640 respectively; one end of the second link 612 is rotatably connected to the first link 611, and the other end is rotatably connected to the first rotating member 620. It is worth noting that the first link 611 and the second link 612 are made of insulating materials.

[0069] In this embodiment, the first connection assembly 200 has a first terminal 210 for connecting to the high-voltage box 11, and the first terminal 210 extends through the peripheral wall of the housing 100 to the outside of the housing 100. The second connection assembly 300 has a second terminal 310 for connecting to the high-voltage box 11, and the second terminal 310 extends through the peripheral wall of the housing 100 to the outside of the housing 100. The third connection assembly 400 has a third terminal 420 for connecting to the high-voltage box 11, and the third terminal 420 extends through the peripheral wall of the housing 100 to the outside of the housing 100. The fourth connection assembly 500 has a fourth terminal 530 for connecting to the high-voltage box 11, and the fourth terminal 530 extends through the peripheral wall of the housing 100 to the outside of the housing 100. Extending the first terminal 210, the second terminal 310, the third terminal 420 and the fourth terminal 530 to the outside of the housing 100 can facilitate the electrical connection between the battery module 12 and the high-voltage box 11 and the conversion device 13.

[0070] Of course, in other embodiments, the first terminal 210 , the second terminal 310 , the third terminal 420 and the fourth terminal 530 may also be configured as plug-in interfaces that are sunk into the inner side of the housing 100 .

[0071] In this embodiment, the conversion device 13 further includes a mounting base 120, which is fixedly disposed outside the housing 100 and is used to be mounted on the box of the battery 10. The mounting base 120 can be bolted to fix the conversion device 13 to the box.

[0072] In summary, in the conversion device 13 provided in this embodiment, the connection mode can be switched between the first connection component 200, the second connection component 300, the third connection component 400 and the fourth connection component 500 by switching the connecting rod mechanism 600 between the first state and the second state. In the first state, the third connection component 400 and the fourth connection component 500 are connected and turned on, so that the two battery modules 12 can be connected in series; and in the second state, the first connection component 200 and the third connection component 400 can be connected and turned on, and the second connection component 300 and the fourth connection component 500 can be connected and turned on, thereby realizing the parallel connection of the two battery modules 12. Therefore, through the activity of the connecting rod mechanism 600, the connection form of the battery module 12 can be adjusted according to actual needs, so that the battery module 12 can be switched between series and parallel, which can not only increase the output form of the battery 10, but also eliminate the need to set up an additional external conversion device when the battery 10 voltage needs to be switched; and, when the consistency of the module is reduced, it is not necessary to remove the battery module 12 from the battery 10, and adjusting the connection relationship between the battery modules 12 can achieve the consistency of multiple battery modules 12. Adjustment can be achieved, thereby solving the problem of poor consistency. Based on this, the conversion device 13 provided by the utility model can improve the problems of poor consistency of the battery module 12 of the battery 10 in the prior art, high difficulty in adjustment, and single application of the fixed output voltage of the battery 10.

[0073] Second embodiment

[0074] See also Figure 4 In this embodiment, a battery 10 is provided, which includes a high-voltage box 11, a plurality of battery modules 12, and at least one conversion device 13 provided in the first embodiment. The relevant contents of the conversion device 13 can refer to the first embodiment above, and will not be repeated in this embodiment.

[0075] Among them, in the battery 10, all battery modules 12 can be electrically connected to the high-voltage box 11 through the conversion device 13, so as to facilitate the adjustment of the connection mode of all battery modules 12. Of course, in other embodiments, some battery modules 12 can also be connected to the high-voltage box 11 through the conversion device 13 to adjust the connection mode of some battery modules 12.

[0076] When the above-mentioned conversion device 13 is adopted, the battery 10 provided in this embodiment can improve the problems in the prior art that the battery module 12 of the battery 10 has poor consistency and high adjustment difficulty, and the battery 10 has a fixed output voltage and a single application scenario.

[0077] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A conversion device, applied to a battery, the battery comprising a high voltage box and a plurality of battery modules, each of the battery modules having a positive connection terminal and a negative connection terminal, characterized in that: The conversion device comprises: A housing having a containing space therein; A first connecting component and a second connecting component are arranged in the accommodating space and are both used to connect the high-voltage box; A third connecting component, disposed in the accommodating space and used to connect the positive electrode connecting end of one of the battery modules; a fourth connecting component, disposed in the accommodating space and used for connecting the negative electrode connecting terminal of another battery module; A connecting rod mechanism is movably arranged in the accommodating space, and the connecting rod mechanism has a first state and a second state; when the connecting rod mechanism is in the first state, the connecting rod mechanism connects and conducts the third connecting component and the fourth connecting component; when the connecting rod mechanism is in the second state, the connecting rod mechanism connects and conducts the first connecting component and the third connecting component, and connects and conducts the second connecting component and the fourth connecting component.

2. The conversion device according to claim 1, characterized in that: The conversion device also includes a driving mechanism and an elastic member; the elastic member is connected to the connecting rod mechanism; the driving mechanism is used to apply a force to the connecting rod mechanism so that the connecting rod mechanism switches from the first state to the second state and deforms the elastic member; the elastic member is used to drive the connecting rod mechanism to switch from the second state to the first state when the driving mechanism withdraws the force.

3. The conversion device according to claim 2, characterized in that: The connecting rod mechanism comprises a linkage mechanism, a first rotating member, a second rotating member and a third rotating member; the first rotating member, the second rotating member and the third rotating member are all connected to the linkage mechanism so that the first rotating member, the second rotating member and the third rotating member move synchronously; The first rotating member is rotatably connected to the third connecting component and is used to selectively connect and conduct the third connecting component and the fourth connecting component; The second rotating member is rotatably connected to the first connecting component, and is used to selectively connect and conduct the first connecting component and the third connecting component; The third rotating member is rotatably connected to the second connecting component, and is used to selectively connect and conduct the second connecting component and the fourth connecting component; The driving mechanism is used to apply a force to at least one of the first rotating member, the second rotating member and the third rotating member; and the elastic member is correspondingly arranged on at least one of the first rotating member, the second rotating member and the third rotating member.

4. The conversion device according to claim 3, characterized in that: The elastic member is a torsion spring, and the elastic member is disposed on a rotating shaft of at least one of the first rotating member, the second rotating member, and the third rotating member.

5. The conversion device according to claim 3, characterized in that: The driving mechanism includes a shaft and a coil; the shaft is fixedly arranged in the accommodating space, and the shaft has two driving parts, the two driving parts are respectively arranged close to the second rotating member and the third rotating member, and the coil is sleeved on the two driving parts, and the coil is used to apply a force to the second rotating member and the third rotating member when energized.

6. The conversion device according to claim 3, characterized in that: The fourth connecting component is provided with a first bridging member adapted to the first rotating member, the first bridging member is provided with a first groove, and when the first rotating member is connected to the first bridging member and is turned on, at least a portion of the first rotating member is accommodated in the first groove; And / or, the third connecting component is provided with a second bridging member adapted to the second rotating member, the second bridging member is provided with a second groove, and when the second rotating member is connected and conducted with the second bridging member, at least a portion of the second rotating member is accommodated in the second groove; And / or, the fourth connecting component is also provided with a third lap member adapted to the third rotating member, and the third lap member is provided with a third groove. When the third rotating member is connected to the third lap member and is conductive, at least a portion of the third rotating member is accommodated in the third groove.

7. The conversion device according to claim 3, characterized in that: The linkage mechanism includes a first connecting rod and a second connecting rod, wherein both ends of the first connecting rod are rotatably connected to the second rotating member and the third rotating member respectively; one end of the second connecting rod is rotatably connected to the first connecting rod, and the other end is rotatably connected to the first rotating member.

8. The conversion device according to claim 1, characterized in that: The first connecting assembly has a first terminal for connecting to the high-voltage box, and the first terminal extends through the peripheral wall of the shell to the outside of the shell; The second connecting assembly has a second terminal for connecting to the high-voltage box, and the second terminal extends through the peripheral wall of the shell to the outside of the shell; The third connecting assembly has a third terminal for connecting to the high-voltage box, and the third terminal extends through the peripheral wall of the shell to the outside of the shell; The fourth connecting assembly has a fourth terminal for connecting to the high-voltage box, and the fourth terminal passes through the peripheral wall of the shell and extends to the outside of the shell.

9. The conversion device according to claim 1, characterized in that: The conversion device also includes a mounting base, which is fixedly arranged on the outside of the shell and is used to be mounted on the box of the battery.

10. A battery, characterized in that: Comprising a conversion device as described in any one of claims 1-9.

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