Battery, battery pack and electric device

Abstract

The utility model discloses a battery, a battery pack and a power utilization device. The battery comprises a shell, at least two electrode assemblies, a top cover assembly and a switching assembly, the shell is provided with an accommodating cavity; the at least two electrode assemblies are arranged in the accommodating cavity; the top cover assembly is connected with the shell and covers the accommodating cavity; the top cover assembly comprises an electrode terminal; the switching assembly is arranged on the side, facing the electrode assembly, of the top cover assembly. The switching assembly comprises at least two connecting parts, each connecting part is connected with one electrode assembly, and each connecting part can be connected with or disconnected from the corresponding electrode terminal; therefore, the battery is in an open-circuit mode or at least one electrode assembly output mode. According to the invention, the switching part is connected with the electrode terminal, the connecting part is connected with the electrode assembly, and the connection relationship between the electrode terminal and the electrode assembly is realized by switching the connection relationship between the connecting part and the switching part, so that the battery is in different output modes; therefore, the battery is disconnected or the electric quantity of the battery in different output modes is detected.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery, a battery pack and an electrical device. Background Art

[0002] After reaching the end of their vehicle service life, power batteries will be recycled according to the battery conditions. For single cells that use multiple electrode assemblies, after reaching the end of their vehicle service life, the capacity attenuation of multiple electrode assemblies is often inconsistent. At this time, if one electrode assembly is used as the detection unit, the number of available electrode assemblies will increase, and they can be easily combined for use. However, single cells with multiple electrode assemblies are mostly parallel structures and encapsulated in a shell, so it is impossible to detect a single electrode assembly, which is not convenient for the recycling of batteries. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery, aiming to solve the problem that the existing dual-cell package in the battery casing cannot perform single-cell detection; another purpose of the embodiment of the present application is to provide a battery pack; another purpose of the embodiment of the present application is to provide an electrical device.

[0004] Technical solution: A battery according to an embodiment of the present application includes:

[0005] A housing having a receiving cavity;

[0006] At least two electrode assemblies are disposed in the accommodating cavity;

[0007] A top cover assembly connected to the housing and covering the accommodating cavity; the top cover assembly includes an electrode terminal;

[0008] A transfer assembly, disposed on a side of the top cover assembly facing the electrode assembly;

[0009] The switching assembly comprises:

[0010] at least two connecting parts, each of which is connected to one of the electrode assemblies;

[0011] Each of the connection parts can be connected to or disconnected from the electrode terminal to put the battery in a disconnection mode or at least one electrode assembly output mode.

[0012] In some embodiments, the adapter assembly further includes a adapter portion, and the adapter portion is connected to the electrode terminal;

[0013] At least two of the connecting parts include:

[0014] A first connecting portion is located at one side of the transition portion, and the first connecting portion includes:

[0015] a first connecting sheet connected to at least one of the two electrode assemblies;

[0016] a first pointer, one end of which is connected to the first connecting piece, and an end of the first pointer away from the first connecting piece can be connected to or disconnected from the adapter;

[0017] The second connecting portion is located at a side of the transition portion away from the first connecting portion, and the second connecting portion includes:

[0018] A second connecting sheet connected to another one of the at least two electrode assemblies;

[0019] The second pointer has one end connected to the second connecting piece, and the end of the second pointer away from the second connecting piece can be connected to or disconnected from the adapter.

[0020] In some embodiments, the at least one electrode assembly output mode includes a single electrode assembly output mode and at least two electrode assemblies in parallel output mode;

[0021] When the battery is in the disconnection mode, an end of the first pointer away from the first connecting piece and an end of the second pointer away from the second connecting piece are suspended;

[0022] When the battery is in a single electrode assembly output mode, the end of the first pointer away from the first connecting sheet is connected to the adapter, and the end of the second pointer away from the second connecting sheet is suspended; or, the end of the first pointer away from the first connecting sheet is suspended, and the end of the second pointer away from the second connecting sheet is connected to the adapter;

[0023] When the battery is in a parallel output mode of at least two electrode assemblies, an end of the first pointer away from the first connecting piece and an end of the second pointer away from the second connecting piece are both connected to the adapter.

[0024] In some embodiments, the top cover assembly also includes a top cover sheet and a lower insulating member, the electrode terminal is connected to the top cover sheet and passes through the top cover sheet, the lower insulating member is arranged on the side of the top cover sheet facing the electrode assembly, at least two of the connecting parts are arranged on the side of the lower insulating member away from the top cover sheet, the transition part passes through the lower insulating member and is connected to the electrode terminal, and an end of the transition part away from the electrode terminal is located on the side of the lower insulating member away from the top cover sheet.

[0025] In some embodiments,

[0026] The electrode terminal includes a first terminal and a second terminal, wherein the first terminal and the second terminal are respectively connected to the top cover sheet and penetrate the top cover sheet;

[0027] The electrode assembly includes a body and a first electrode and a second electrode respectively connected to the body;

[0028] The battery comprises:

[0029] The two adapter assemblies are respectively a first assembly and a second assembly, the first connecting piece and the second connecting piece of the first assembly are respectively connected to the first electrodes of at least two of the electrode assemblies, the adapter of the first assembly is connected to the first terminal, the first connecting piece and the second connecting piece of the second assembly are respectively connected to the second electrodes of at least two of the electrode assemblies, and the adapter of the second assembly is connected to the second terminal;

[0030] a third connecting portion, disposed on a side of the lower insulating member facing the electrode assembly and located between the first assembly and the second assembly;

[0031] The polarities of the first electrode and the second electrode are opposite, and the polarities of the first terminal and the second terminal are opposite.

[0032] In some embodiments, the at least one electrode assembly output mode further comprises at least two electrode assemblies in series output mode;

[0033] When the battery is in a mode of outputting at least two electrode assemblies in series, one end of the first pointer of the first assembly away from the first connecting sheet is connected to the adapter of the first assembly, and one end of the second pointer of the first assembly away from the second connecting sheet is connected to one end of the third connecting section; one end of the first pointer of the second assembly away from the first connecting sheet is connected to the other end of the third connecting section, and one end of the second pointer of the second assembly away from the second connecting sheet is connected to the adapter of the second assembly;

[0034] Alternatively, one end of the first pointer of the first component away from the first connecting piece is connected to one end of the third connecting part, and one end of the second pointer of the first component away from the second connecting piece is connected to the adapter part of the first component; one end of the first pointer of the second component away from the first connecting piece is connected to the adapter part of the second component, and one end of the second pointer of the second component away from the second connecting piece is connected to the other end of the third connecting part.

[0035] In some embodiments, the first pointer includes:

[0036] A first needle body, capable of being connected to or disconnected from the adapter;

[0037] A first rotating shaft is connected to the first needle body and the first connecting piece respectively;

[0038] A first knob, passing through the top cover assembly and connected to the first rotating shaft;

[0039] The second pointer includes:

[0040] A second needle body, capable of being connected to or disconnected from the adapter;

[0041] A second rotating shaft is connected to the second needle body and the second connecting piece respectively;

[0042] A second knob passes through the top cover assembly and is connected to the second rotating shaft.

[0043] In some embodiments, the adapter assembly also includes a packaging box, which is located on a side of the lower insulating member facing away from the top cover sheet, and has a accommodating space, and the first pointer, the second pointer, at least a portion of the adapter portion, and at least a portion of the third connecting portion are located in the accommodating space, and the packaging box is connected to the lower insulating member.

[0044] In some embodiments, the third connection portion includes:

[0045] A first end is located in the packaging box of the first component;

[0046] The second end is opposite to the first end, and the second end is located in the packaging box of the second component.

[0047] Accordingly, a battery pack described in an embodiment of the present application includes a battery as described in any one of the aforementioned embodiments.

[0048] Correspondingly, an electrical device described in an embodiment of the present application includes a battery as described in any one of the aforementioned embodiments, or a battery pack as described in the aforementioned embodiments.

[0049] Beneficial effects: Compared with the prior art, a battery in an embodiment of the present application includes a shell, at least two electrode assemblies, a top cover assembly, and a switching assembly; the shell has a receiving cavity; at least two electrode assemblies are arranged in the receiving cavity; the top cover assembly is connected to the shell and covers the receiving cavity; the top cover assembly includes an electrode terminal; the switching assembly is arranged on the side of the top cover assembly facing the electrode assembly; the switching assembly includes at least two connecting parts, each connecting part is connected to an electrode assembly, and each connecting part can be connected or disconnected with the electrode terminal to put the battery in a circuit-breaking mode or at least one electrode assembly output mode. The present application realizes the connection relationship between the electrode terminal and the electrode assembly by switching the connection relationship between the connecting part and the electrode terminal, thereby realizing the battery in different output modes, and then realizing the battery circuit-breaking or detecting the power of the battery when it is in different output modes.

[0050] Compared with the prior art, a battery pack according to an embodiment of the present application includes a battery as described in any one of the above embodiments. It is understandable that the battery pack according to the embodiment of the present application includes all the technical features and technical effects of the battery in the above embodiments, which will not be repeated here.

[0051] Compared with the prior art, an electric device in an embodiment of the present application includes a battery as described in any one of the above embodiments, or a battery pack as described in the above embodiments. It can be understood that the electric device in an embodiment of the present application includes all the technical features and technical effects of the battery or battery pack in the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 is a schematic diagram of the overall structure of a battery in an embodiment of the present application;

[0054] Figure 2 It is a schematic diagram of the structure of a top cover assembly and a switching assembly of a battery in an embodiment of the present application;

[0055] Figure 3 It is a schematic diagram of the structure of a top cover assembly and a switching assembly of a battery in an embodiment of the present application;

[0056] Figure 4 It is a schematic diagram of the specific structure of a top cover assembly and a switching assembly of a battery in an embodiment of the present application;

[0057] Figure 5 It is a bottom view of a top cover assembly and a switching assembly of a battery according to an embodiment of the present application;

[0058] Figure 6 It is a rear view of a top cover assembly and a switching assembly of a battery according to an embodiment of the present application;

[0059] Figure 7 is a circuit diagram of two electrode assemblies of a battery in an embodiment of the present application when they are connected in parallel;

[0060] Figure 8 is a circuit diagram of two electrode assemblies of a battery in an embodiment of the present application connected in series;

[0061] Fig. 9 It is a circuit diagram of a single electrode assembly of a battery in an embodiment of the present application when outputting;

[0062] Fig.10 It is a circuit diagram of a battery according to an embodiment of the present application when two electrode assemblies are disconnected.

[0063] Reference numerals:

[0064] 1. Shell; 11. Accommodating cavity; 2. Electrode assembly; 21. First electrode; 22. Second electrode; 3. Top cover assembly; 31. Electrode terminal; 311. First terminal; 312. Second terminal; 32. Top cover sheet; 33. Lower insulating member; 4. Adapter assembly; 41. Connecting part; 411. First connecting part; 4111. First connecting sheet; 4112. First pointer; 41121. First needle body; 41122. First rotating shaft; 41123. First knob; 412. Second connecting part; 4121. Second connecting sheet; 4122. Second pointer; 41221. Second needle body; 41222. Second rotating shaft; 41223. Second knob; 42. Adapter; 43. Packaging box; 431. Accommodating space; 44. First assembly; 45. Second assembly; 5. Third connecting part; 51. First end; 52. Second end. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0066] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0067] The applicant noted that, at present, new energy vehicles are developing more and more rapidly, and the development speed of its core component - power batteries is also getting faster and faster. However, as a carrier of electric energy, power batteries also have a service life. After reaching the end of their service life, their treatment has always been a thorny issue. The current mainstream solution is cascade utilization, that is, although power batteries can no longer be used in automobiles after reaching their service life, they still have a certain energy storage capacity and can be used for other purposes after screening, such as grid energy storage, household energy storage and electric bicycles.

[0068] For single cells using dual-electrode assemblies, generally two electrode assemblies are connected in parallel. After reaching the end of the vehicle service life, the capacity attenuation of the two electrode assemblies is often inconsistent. Their capacity depends on the electrode assembly with the most severe attenuation, which limits their potential for cascade utilization. In addition, the performance of the electrode assemblies must be sorted before they are used in combination. Often, after more than ten years of use, the attenuation of single cells of the same type is different, making it difficult to use them in combination. For single cells with dual-electrode assemblies, if a single electrode assembly is used as the detection unit, the number of available electrode assemblies will double, and they can be easily used in combination. However, the connection schemes for most dual-electrode assemblies are to weld the poles of the two electrode assemblies together on the poles (two positive poles are connected to the same positive terminal, and two negative poles are connected to the same negative terminal). There is only one parallel state, and it is impossible to detect a single electrode assembly or use it alone, which affects the selection and pairing of electrode assemblies and is not conducive to the cascade utilization of electrode assemblies.

[0069] In view of this, an embodiment of the present application proposes a battery to solve the above-mentioned problem.

[0070] Please refer to Figure 1-Figure 10 The embodiment of the present application proposes a battery, including a shell 1, at least two electrode assemblies 2, a top cover assembly 3 and a switching assembly 4. The shell 1 has a accommodating cavity 11; at least two electrode assemblies 2 are arranged in the accommodating cavity 11; the top cover assembly 3 is connected to the shell 1 and covers the accommodating cavity 11. The top cover assembly 3 includes an electrode terminal 31, and the switching assembly 4 is arranged on the side of the top cover assembly 3 facing the electrode assembly 2; the switching assembly 4 includes at least two connecting parts 41, each connecting part 41 is connected to an electrode assembly 2, and each connecting part 41 is connected or disconnected with the electrode terminal 31, so that the battery is in a circuit breaker mode or an output mode of at least one electrode assembly 2.

[0071] In the embodiment of the present application, an adapter assembly 4 is provided to connect the electrode terminal 31 and the electrode assembly 2, wherein each connection portion 41 of the adapter assembly 4 is connected to an electrode assembly 2, and one end of the connection portion 41 away from the electrode assembly 2 is connected to the electrode terminal 31. Then, by switching the connection relationship between at least two connection portions 41 and the electrode terminal 31, the connection relationship between the electrode terminal 31 and the electrode assembly 2 is switched, so that the battery is in different output modes. Specifically, the connection portion 41 may be disconnected from the electrode terminal 31 after being connected to the electrode assembly 2, at which time the battery is in the circuit-breaking mode, or after one electrode assembly 2 is connected to the connection portion 41, one of the connection portions 41 is connected to the electrode terminal 31 to realize the output of a single electrode assembly 2, or after at least two electrode assemblies 2 are connected to the connection portion 41, at least two connection portions 41 are connected to the electrode terminal 31 to realize the parallel output of the electrode assembly 2, thereby realizing the battery circuit-breaking or detecting the power of the battery when it is in different output modes.

[0072] It should be noted that the single cell generally has two electrode terminals 31 (i.e., poles), namely, the positive terminal and the negative terminal. Therefore, the battery output is divided into a positive terminal and a negative terminal. The electrode assembly 2 (or winding core assembly) inside the battery generally includes a positive electrode (positive pole ear) and a negative electrode (negative pole ear). The connection relationship of a normal battery is that the positive electrodes of all electrode assemblies 2 are connected in parallel to the positive terminal, and the negative electrodes of all electrode assemblies 2 are connected in parallel to the negative terminal. Then the battery uses the positive terminal and the negative terminal to connect to the charging device or external electrical equipment for charging and discharging. In the embodiment of the present application, an adapter assembly 4 is provided to be connected to the electrode terminal 31, and the adapter assembly 4 can be provided as one or two. When there is one adapter assembly 4, it can be connected to one of the positive terminal or the negative terminal. At this time, the electrode terminal 31 that is not connected to the adapter assembly 4 is still connected to the parallel electrode.

[0073] In addition, the adapter assembly 4 may further include an adapter portion 42 , in which case the electrode terminal 31 is connected to the adapter portion 42 , and an end of the connection portion 41 away from the electrode assembly 2 is connected to or disconnected from the adapter portion 42 to switch the battery mode.

[0074] The following conventional dual-electrode assembly 2 battery is taken as the main body, and the example in which there is only one adapter assembly 4 and it is connected to the positive terminal, and the adapter assembly 4 includes a adapter part 42, and the adapter part 42 is connected to the positive terminal is taken as an example to illustrate the embodiment of this case.

[0075] The dual electrode assembly 2 may include a first electrode assembly 21 and a second electrode assembly 22. The adapter assembly 4 includes two connecting parts 41, namely a first connecting part 411 and a second connecting part 412. The positive electrode of the first electrode assembly 21 is connected to the first connecting part 411, and the positive electrode of the second electrode assembly 22 is connected to the second connecting part 412. The adapter 42 is connected to the positive terminal, and the adapter 42 is arranged between the first connecting part 411 and the second connecting part 412, so as to facilitate the connection between the first connecting part 411 and the second connecting part 412 and the adapter 42. The negative electrodes of the first electrode assembly 21 and the second electrode assembly 22 are directly connected to the negative terminal of the battery after being folded in parallel. At this time, different output states of the dual electrode assembly 2 can be achieved by adjusting the connection relationship between the first connecting part 411 and the second connecting part 412 and the adapter 42. Specifically, at this time, since the negative electrodes of all electrode assemblies 2 are connected to the negative terminal, the output state of the electrode assembly 2 can be adjusted only by adjusting the adapter 4. For example: adjust the first connection part 411 and the second connection part 412 so that they are not connected to the adapter part 42. At this time, the first electrode assembly 21 and the second electrode assembly 22 are in an open circuit state, and the battery is in an open circuit mode; adjust the first connection part 411 to connect with the adapter part 42, and the second connection part 412 is not connected with the adapter part 42. At this time, the positive electrode of the first electrode assembly 21 is connected to the positive terminal, the second electrode assembly 22 is in an open circuit state, and the battery is in a single electrode assembly 2 output mode; adjust the second connection part 412 to connect with the adapter part 42, and the first connection part 411 is not connected with the adapter part 42. At this time, the positive electrode of the second electrode assembly 22 is connected to the positive terminal, the first electrode assembly 21 is in an open circuit state, and the battery is in a single electrode assembly 2 output mode; adjust the first connection part 411 and the second connection part 412 to connect with the adapter part 42 at the same time. At this time, the positive electrodes of the first electrode assembly 21 and the second electrode assembly 22 are both connected to the positive terminal, and the battery is in a parallel output mode.

[0076] Of course, the adapter component 4 can also be set to two, in which case the two adapter components 4 can be respectively a first component 44 and a second component 45. Specifically, the adapter portion 42 of the first component 44 is connected to the positive terminal, and the adapter portion 42 of the second component 45 is connected to the negative terminal. The first connection portion 411 of the first component 44 is connected to the positive electrode of the first electrode component 21, and the second connection portion 412 of the first component 44 is connected to the positive electrode of the second electrode component 22; the first connection portion 411 of the second component 45 is connected to the negative electrode of the first electrode component 21, and the second connection portion 412 of the second component 45 is connected to the negative electrode of the second electrode component 22. Fig.10 As shown, when the first connection part 411 and the second connection part 412 of the first component 44 are both suspended (i.e., not connected to the adapter 42), and / or the first connection part 411 and the second connection part 412 of the second component 45 are both suspended (i.e., not connected to the adapter 42), the battery is in the disconnection mode. When the first connection part 411 of the first component 44 is connected to the adapter 42 and the second connection part 412 is suspended, and at the same time, the first connection part 411 of the second component 45 is connected to the adapter 42 and the second connection part 412 is suspended, the positive electrode of the first electrode component 21 is connected to the positive terminal, and the negative electrode of the first electrode component 21 is connected to the negative terminal, and the battery is in the single electrode component 2 output mode. Fig. 9 As shown, when the second connection portion 412 of the first component 44 is connected to the adapter portion 42 and the first connection portion 411 is suspended, and the second connection portion 412 of the second component 45 is connected to the adapter portion 42 and the first connection portion 411 is suspended, the positive electrode of the second electrode component 22 is connected to the positive terminal, and the negative electrode of the second electrode component 22 is connected to the negative terminal, and the battery is in a single electrode component 2 output mode. Figure 7 As shown, when the first connection part 411 and the second connection part 412 of the first component 44 are connected to the adapter part 42 at the same time, and the first connection part 411 and the second connection part 412 of the second component 45 are connected to the adapter part 42 at the same time, the first electrode component 21 and the second electrode component 22 are connected in parallel and connected to the positive terminal and the negative terminal, and the battery is in parallel output mode.

[0077] Please refer to Figure 1-Figure 10 , in some embodiments,

[0078] The adapter assembly further includes an adapter portion 42, and the adapter portion 42 is connected to the electrode terminal 31;

[0079] At least two connecting parts 41 include:

[0080] The first connection portion 411 is located at one side of the adapter portion 42. The first connection portion 411 includes:

[0081] A first connecting sheet 4111 connected to at least one of the two electrode assemblies 2;

[0082] A first pointer 4112, one end of which is connected to the first connecting piece 4111, and an end of the first pointer 4112 away from the first connecting piece 4111 can be connected to or disconnected from the adapter 42;

[0083] The second connection portion 412 is located at a side of the adapter portion 42 away from the first connection portion 411. The second connection portion 412 includes:

[0084] The second connecting piece 4121 is connected to the other one of the at least two electrode assemblies 2;

[0085] One end of the second pointer 4122 is connected to the second connecting piece 4121 , and one end of the second pointer 4122 away from the second connecting piece 4121 can be connected to or disconnected from the adapter 42 .

[0086] In the embodiment of the present application, the adapter assembly 4 is only connected to one electrode terminal 31 of the battery, and each electrode terminal 31 is connected to one electrode of the electrode assembly 2. The adapter assembly 4 of the embodiment of the present application is suitable for the case of at least two electrode assemblies 2. The electrode of each electrode assembly 2 needs to be connected to a connecting portion 41. Therefore, at least two electrode assemblies 2 require at least two connecting portions 41, so that the number of connecting portions 41 and the number of electrode assemblies 2 correspond one to one. Among them, the at least two connecting portions 41 include a first connecting portion 411 and a second connecting portion 412. The first connecting portion 411 is connected to the electrode of the electrode assembly 2 through a first connecting sheet 4111, and is connected or disconnected with the adapter portion 42 through a first pointer 4112; the second connecting portion 412 is connected to the electrode of the electrode assembly 2 through a second connecting sheet 4121, and is connected or disconnected with the adapter portion 42 through a second pointer 4122.

[0087] In some embodiments, at least one electrode assembly 2 output mode includes a single electrode assembly 2 output mode and at least two electrode assemblies 2 parallel output mode;

[0088] When the battery is in the disconnection mode, one end of the first pointer 4112 away from the first connecting piece 4111 and one end of the second pointer 4122 away from the second connecting piece 4121 are both suspended.

[0089] When the battery is in the single electrode assembly 2 output mode, the end of the first pointer 4112 away from the first connecting plate 4111 is connected to the adapter 42, and the end of the second pointer 4122 away from the second connecting plate 4121 is suspended in the air; or, the end of the first pointer 4112 away from the first connecting plate 4111 is suspended in the air, and the end of the second pointer 4122 away from the second connecting plate 4121 is connected to the adapter 42.

[0090] When the battery is in a parallel output mode of at least two electrode assemblies 2 , one end of the first pointer 4112 away from the first connecting piece 4111 and one end of the second pointer 4122 away from the second connecting piece 4121 are both connected to the adapter 42 .

[0091] As in the above-mentioned embodiment of the dual-electrode assembly 2, it is assumed that an adapter assembly 4 is provided at the positive end of the battery. At this time, the adapter portion 42 of the adapter assembly 4 is connected to one of the positive terminals of the battery, and each connection portion 41 of the adapter assembly 4 is connected to the positive electrode of each electrode assembly 2. That is, the first connection piece 4111 of the first connection portion 411 is connected to the positive electrode of the first electrode assembly 21, and the second connection piece 4121 of the second connection portion 412 is connected to the positive electrode of the second electrode assembly 22. The adapter assembly 4 can be provided at the negative end of the battery, or the negative electrodes of the two electrode assemblies 2 can be directly connected in parallel and connected to the negative terminal. Here, the negative electrodes of the two electrode assemblies 2 are connected in parallel and connected to the negative terminal as an example for explanation. If you want the battery to be in the disconnection mode, the first pointer 4112 of the first connection portion 411 and the second pointer 4122 of the second connection portion 412 are suspended, that is, not connected to the adapter portion 42. At this time, the battery is in the disconnection mode and cannot be charged or discharged. Rotate the first pointer 4112 and the second pointer 4122, when the first pointer 4112 is connected to the adapter 42 and the second pointer 4122 is suspended, the first electrode assembly 21 is connected to the positive terminal, the second electrode assembly 22 is disconnected, the battery is in a single battery output mode, and the first electrode assembly 21 can be charged and discharged separately. Rotate the first pointer 4112 and the second pointer 4122, when the second pointer 4122 is connected to the adapter 42 and the first pointer 4112 is suspended, the second electrode assembly 22 is connected to the positive terminal, the first electrode assembly 21 is disconnected, the battery is in a single battery output mode, and the second electrode assembly 22 can be charged and discharged separately. Rotate the first pointer 4112 and the second pointer 4122, when the first pointer 4112 and the second pointer 4122 are simultaneously connected to the adapter 42, the first electrode assembly 21 and the second electrode assembly 22 are connected in parallel and connected to the positive terminal, the battery is in a parallel output mode, and the first electrode assembly 21 and the second electrode assembly 22 are charged and discharged in parallel.

[0092] In some embodiments, the top cover assembly 3 also includes a top cover sheet 32 ​​and a lower insulating member 33, the electrode terminal 31 is connected to the top cover sheet 32 ​​and passes through the top cover sheet 32, the lower insulating member 33 is arranged on the side of the top cover sheet 32 ​​facing the electrode assembly 2, at least two connecting parts 41 are arranged on the side of the lower insulating member 33 away from the top cover sheet 32, the transition part 42 passes through the lower insulating member 33 and is connected to the electrode terminal 31, and the end of the transition part 42 away from the electrode terminal 31 is located on the side of the lower insulating member 33 away from the top cover sheet 32.

[0093] In this embodiment, the lower insulating member 33 is provided to separate the connection portion 41 from the top cover sheet 32, thereby achieving insulation between the connection portion 41 and the top cover sheet 32. The electrode terminal 31 itself is insulated and connected to the top cover sheet 32 ​​through the upper insulating member, and the adapter portion 42 passes through the lower insulating member 33 and is connected to the electrode terminal 31, and does not contact the top cover sheet 32. Therefore, the adapter assembly 4 is insulated and connected to the top cover sheet 32, thereby preventing the connection between the adapter assembly 4 and the top cover sheet 32 ​​from causing a short circuit in the electrode assembly 2.

[0094] In some embodiments, the electrode terminal 31 includes a first terminal 311 and a second terminal 312, and the first terminal 311 and the second terminal 312 are respectively connected to the top cover sheet 32 ​​and the first terminal 311 and the second terminal 312 respectively penetrate the top cover sheet 32. Among them, since the top cover sheet 32 ​​is a profile, an upper insulating member is provided between the top cover sheet 32 ​​and the electrode terminal 31, and the upper insulating member is spaced between the electrode terminal 31 and the top cover sheet 32 ​​to prevent the electrode terminal 31 from directly contacting the top cover sheet 32 ​​and causing a short circuit. In an embodiment of the present application, the first terminal 311 can be a positive terminal, and the second terminal 312 can be a negative terminal, which is used to connect to the pole ear of the electrode assembly 2. The electrode assembly 2 includes a body and a first electrode 211 and a second electrode 212 respectively connected to the body. Among them, the first electrode 211 can be a positive electrode and connected to the positive terminal, and the second electrode 212 can be a negative electrode and connected to the negative terminal. The battery includes a third connecting portion 5 and two adapter assemblies 4. The two adapter components 4 are respectively a first component 44 and a second component 45, the first connecting piece 4111 and the second connecting piece 4121 of the first component 44 are respectively connected to the first electrodes 211 of at least two electrode components 2, the adapter portion 42 of the first component 44 is connected to the first terminal 311, the first connecting piece 4111 and the second connecting piece 4121 of the second component 45 are respectively connected to the second electrodes 212 of at least two electrode components 2, and the adapter portion 42 of the second component 45 is connected to the second terminal 312; the third connecting portion 5 is arranged on the side of the lower insulating member 33 facing the electrode assembly 2, and is located between the first component 44 and the second component 45; wherein, the polarities of the first electrode 211 and the second electrode 212 are opposite, and the polarities of the first terminal 311 and the second terminal 312 are opposite.

[0095] In this embodiment, the battery includes two adapter assemblies 4 and a third connecting portion 5 located between the two adapter assemblies 4, which can not only realize the battery in an open circuit mode, a single electrode assembly 2 output mode and a parallel output mode of at least two electrode assemblies 2, but also realize a series output mode of at least two electrode assemblies 2 in the battery.

[0096] Specifically, in some embodiments, the output mode of at least one electrode assembly 2 also includes a series output mode of at least two electrode assemblies 2. When the battery is in the series output mode of at least two electrode assemblies 2, the end of the first pointer 4112 of the first assembly 44 away from the first connecting piece 4111 is connected to the adapter 42 of the first assembly 44, and the end of the second pointer 4122 of the first assembly 44 away from the second connecting piece 4121 is connected to one end of the third connecting part 5; the end of the first pointer 4112 of the second assembly 45 away from the first connecting piece 4111 is connected to the other end of the third connecting part 5, and the end of the second pointer 4122 of the second assembly 45 away from the second connecting piece 4121 is connected to the adapter 42 of the second assembly 45.

[0097] Alternatively, one end of the first pointer 4112 of the first component 44 away from the first connecting piece 4111 is connected to one end of the third connecting part 5, and one end of the second pointer 4122 of the first component 44 away from the second connecting piece 4121 is connected to the adapter part 42 of the first component 44; one end of the first pointer 4112 of the second component 45 away from the first connecting piece 4111 is connected to the adapter part 42 of the second component 45, and one end of the second pointer 4122 of the second component 45 away from the second connecting piece 4121 is connected to the other end of the third connecting part 5.

[0098] In an embodiment of the present application, the two electrode assemblies 2 can be connected in series by switching the positive electrode of one of the two adjacent electrode assemblies 2 to be connected to the negative electrode of the other electrode assembly 2, and connecting the remaining positive electrode to the positive terminal and the remaining negative electrode to the negative terminal.

[0099] In some embodiments, the first pointer 4112 includes a first needle body 41121, a first rotating shaft 41122 and a first knob 41123; the first needle body 41121 can be connected to or disconnected from the adapter 42; the first rotating shaft 41122 is respectively connected to the first needle body 41121 and the first connecting piece 4111; the first knob 41123 penetrates the top cover assembly 3 and is connected to the first rotating shaft 41122. The second pointer 4122 includes a second needle body 41221, a second rotating shaft 41222 and a second knob 41223; the second needle body 41221 can be connected to or disconnected from the adapter 42; the second rotating shaft 41222 is respectively connected to the second needle body 41221 and the second connecting piece 4121; the second knob 41223 penetrates the top cover assembly 3 and is connected to the second rotating shaft 41222.

[0100] In this embodiment, the first rotating shaft 41122 is fixedly connected to the first needle body 41121, and the first rotating shaft 41122 can be directly attached to the first connecting piece 4111, or connected to the first connecting piece 4111 by setting a wire, the first rotating shaft 41122 is attached to the wire, and when the first rotating shaft 41122 rotates, the first rotating shaft 41122 and the first connecting piece 4111 or the wire are still attached and connected. The first knob 41123 is an insulating member, which passes through the top cover sheet 32 ​​and is fixedly connected to the first rotating shaft 41122. The first rotating shaft 41122 is rotated by rotating the first knob 41123, and the first rotating shaft 41122 is rotated, and the first needle body 41121 is rotated. Similarly, the second rotating shaft 41222 is fixedly connected to the second needle body 41221, and the second rotating shaft 41222 can be directly attached to the second connecting piece 4121, or connected to the second connecting piece 4121 by setting a wire, and the second rotating shaft 41222 is attached to the wire, and when the second rotating shaft 41222 rotates, the second rotating shaft 41222 is still attached to the second connecting piece 4121 or the wire. The second knob 41223 is an insulating member, which passes through the top cover sheet 32 ​​and is fixedly connected to the second rotating shaft 41222. The second rotating shaft 41222 is rotated by the second knob 41223 to rotate, and the second rotating shaft 41222 rotates, which drives the second needle body 41221 to rotate.

[0101] It should be noted that the first knob 41123 and the second knob 41223 are both in sealing contact with the top cover sheet 32, and the first knob 41123 and the second knob 41223 are rotatably embedded in the top cover sheet 32, so that the sealing of the top cover sheet 32 ​​is not affected on the basis of realizing rotation to adjust the pointer, and the short circuit between the connection part 41 and the top cover sheet 32 ​​can be avoided. The first knob 41123 and the second knob 41223 can be made of materials such as nylon columns, and the first rotating shaft 41122 and the second rotating shaft 41222 can be provided with a groove on the side away from the electrode assembly 2, and the knob passes through the top cover sheet 32 ​​and is fixedly inserted in the groove, so as to realize the connection between the knob and the rotating shaft.

[0102] like Figure 2 As shown, it should also be noted that since at least two electrode assemblies 2 are encapsulated in the battery shell 1 by the top cover assembly 3, in order to facilitate distinction, which electrode assembly 2 is specifically connected to the connecting portion 41 can be distinguished by direct observation from the outside of the battery. At this time, a cross groove can be set on the side of the first knob 41123 facing away from the electrode assembly 2, and a straight groove can be set on the side of the second knob 41223 facing away from the electrode assembly 2. The first knobs 41123 of the two adapter assemblies 4 correspond to the positive and negative ears of the first electrode assembly 21, and the second knobs 41223 of the two adapter assemblies 4 correspond to the positive and negative ears of the second electrode assembly 22.

[0103] In addition, it should be noted that at least two connecting portions 41 , part of the transition portion 42 , and the third connecting portion 5 can be fixed to the side of the lower insulating member 33 facing away from the top cover sheet 32 ​​by gluing or the like.

[0104] like Figure 3-Figure 6 As shown, in some embodiments, the adapter assembly 4 also includes a packaging box 43, which is located on the side of the lower insulating member 33 away from the top cover sheet 32, and the packaging box 43 has a receiving space 431. The first pointer 4112, the second pointer 4122, at least a portion of the adapter portion 42, and at least a portion of the third connecting portion 5 are located in the receiving space 431, and the packaging box 43 is connected to the lower insulating member 33.

[0105] In this embodiment, a packaging box 43 is provided to package the first pointer 4112, the second pointer 4122, at least a portion of the adapter 42, and at least a portion of the third connection portion 5, so that the first pointer 4112, the second pointer 4122, at least a portion of the adapter 42, and at least a portion of the third connection portion 5 are separated from the electrode assembly 2 to avoid causing a short circuit inside the battery. In addition, the packaging box 43 can be provided to be sealed and connected to the lower insulating member 33, so as to effectively prevent the electrolyte from leaking outward from the gap at the connection between the first rotating shaft 41122 and the second rotating shaft 41222 and the knob.

[0106] In some embodiments, the third connection portion 5 includes a first end 51 and a second end 52 , wherein the first end 51 is located in the packaging box 43 of the first component 44 ; the second end 52 is opposite to the first end 51 and is located in the packaging box 43 of the second component 45 .

[0107] In the embodiment of the present application, since it is necessary to achieve contact and connection between the first pointer 4112 and / or the second pointer 4122 and the third connecting part 5, the two ends of the third connecting part 5 are closer to the electrode assembly 2 than the middle connecting wire, and its outer surface needs to be conductive to achieve circuit connectivity with the pointers. Therefore, the two ends are respectively encapsulated in the corresponding packaging box 43, which can effectively avoid the short circuit problem caused by the connection between the third connecting part 5 and the electrode assembly 2.

[0108] Accordingly, a battery pack according to an embodiment of the present application includes a battery as described in any one of the aforementioned embodiments.

[0109] It is understood that the battery pack of the embodiment of the present application includes all the technical features and technical effects of the battery in the aforementioned embodiment, which will not be repeated here. It should be noted that the battery pack of the embodiment of the present application can be used for backup power supply, electrode, electric vehicle, electric bicycle, electric motorcycle, large storage battery, etc.

[0110] Accordingly, an electric device in an embodiment of the present application includes a battery as described in any one of the above embodiments, or a battery pack as described in the above embodiments. It can be understood that the electric device in an embodiment of the present application includes all the technical features and technical effects of the battery or battery pack in the above embodiments, which will not be repeated here.

[0111] It should be noted that the electrical devices in the embodiments of the present application include but are not limited to electric vehicles, electric bicycles, backup power supplies, large batteries, large mobile devices, etc.

[0112] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0113] The above is a detailed introduction to a battery, a battery pack and an electrical device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A housing having a receiving cavity; At least two electrode assemblies are disposed in the accommodating cavity; A top cover assembly, connected to the shell and covering the accommodating cavity; The top cap assembly includes an electrode terminal; A transfer assembly, disposed on a side of the top cover assembly facing the electrode assembly; The switching assembly comprises: at least two connecting parts, each of which is connected to one of the electrode assemblies; Each of the connection parts can be connected to or disconnected from the electrode terminal to put the battery in a disconnection mode or at least one electrode assembly output mode.

2. The battery according to claim 1, characterized in that The adapter assembly further includes an adapter portion, and the adapter portion is connected to the electrode terminal; At least two of the connecting parts include: A first connecting portion is located at one side of the transition portion, and the first connecting portion includes: a first connecting sheet connected to at least one of the two electrode assemblies; a first pointer, one end of which is connected to the first connecting piece, and an end of the first pointer away from the first connecting piece can be connected to or disconnected from the adapter; The second connecting portion is located at a side of the transition portion away from the first connecting portion, and the second connecting portion includes: A second connecting sheet connected to another one of the at least two electrode assemblies; The second pointer has one end connected to the second connecting piece, and the end of the second pointer away from the second connecting piece can be connected to or disconnected from the adapter.

3. The battery according to claim 2, characterized in that The at least one electrode assembly output mode includes a single electrode assembly output mode and at least two electrode assemblies in parallel output mode; When the battery is in the disconnection mode, an end of the first pointer away from the first connecting piece and an end of the second pointer away from the second connecting piece are suspended; When the battery is in a single electrode assembly output mode, the end of the first pointer away from the first connecting sheet is connected to the adapter, and the end of the second pointer away from the second connecting sheet is suspended; or, the end of the first pointer away from the first connecting sheet is suspended, and the end of the second pointer away from the second connecting sheet is connected to the adapter; When the battery is in a parallel output mode of at least two electrode assemblies, an end of the first pointer away from the first connecting piece and an end of the second pointer away from the second connecting piece are both connected to the adapter.

4. The battery according to claim 3, characterized in that The top cover assembly also includes a top cover sheet and a lower insulating member, the electrode terminal is connected to the top cover sheet and passes through the top cover sheet, the lower insulating member is arranged on a side of the top cover sheet facing the electrode assembly, at least two of the connecting parts are arranged on a side of the lower insulating member away from the top cover sheet, the transition part passes through the lower insulating member and is connected to the electrode terminal, and an end of the transition part away from the electrode terminal is located on a side of the lower insulating member away from the top cover sheet.

5. The battery according to claim 4, characterized in that The electrode terminal includes a first terminal and a second terminal, wherein the first terminal and the second terminal are respectively connected to the top cover sheet and penetrate the top cover sheet; The electrode assembly includes a body and a first electrode and a second electrode respectively connected to the body; The battery comprises: The two adapter assemblies are respectively a first assembly and a second assembly, the first connecting piece and the second connecting piece of the first assembly are respectively connected to the first electrodes of at least two of the electrode assemblies, the adapter of the first assembly is connected to the first terminal, the first connecting piece and the second connecting piece of the second assembly are respectively connected to the second electrodes of at least two of the electrode assemblies, and the adapter of the second assembly is connected to the second terminal; a third connecting portion, disposed on a side of the lower insulating member facing the electrode assembly and located between the first assembly and the second assembly; The polarities of the first electrode and the second electrode are opposite, and the polarities of the first terminal and the second terminal are opposite.

6. The battery according to claim 5, characterized in that The at least one electrode assembly output mode also includes at least two electrode assemblies in series output mode; When the battery is in a mode of outputting at least two electrode assemblies in series, one end of the first pointer of the first assembly away from the first connecting sheet is connected to the adapter of the first assembly, and one end of the second pointer of the first assembly away from the second connecting sheet is connected to one end of the third connecting section; one end of the first pointer of the second assembly away from the first connecting sheet is connected to the other end of the third connecting section, and one end of the second pointer of the second assembly away from the second connecting sheet is connected to the adapter of the second assembly; Alternatively, one end of the first pointer of the first component away from the first connecting piece is connected to one end of the third connecting part, and one end of the second pointer of the first component away from the second connecting piece is connected to the adapter part of the first component; one end of the first pointer of the second component away from the first connecting piece is connected to the adapter part of the second component, and one end of the second pointer of the second component away from the second connecting piece is connected to the other end of the third connecting part.

7. The battery according to any one of claims 2 to 6, characterized in that: The first pointer includes: A first needle body, capable of being connected to or disconnected from the adapter; A first rotating shaft is connected to the first needle body and the first connecting piece respectively; A first knob, passing through the top cover assembly and connected to the first rotating shaft; The second pointer includes: A second needle body, capable of being connected to or disconnected from the adapter; A second rotating shaft is connected to the second needle body and the second connecting piece respectively; A second knob passes through the top cover assembly and is connected to the second rotating shaft.

8. The battery according to claim 5, characterized in that The adapter assembly also includes a packaging box, which is located on a side of the lower insulating member facing away from the top cover sheet. The packaging box has a accommodating space, and the first pointer, the second pointer, at least a portion of the adapter portion, and at least a portion of the third connecting portion are located in the accommodating space. The packaging box is connected to the lower insulating member.

9. The battery according to claim 8, characterized in that The third connecting portion comprises: A first end is located in the packaging box of the first component; The second end is opposite to the first end, and the second end is located in the packaging box of the second component.

10. A battery pack, characterized in that: Comprising a battery as claimed in any one of claims 1 to 9.

11. An electrical device, characterized in that: Comprising a battery as described in any one of claims 1 to 9, or a battery pack as described in claim 10.

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