Long-life battery capable of improving over-current capability and electric equipment

Abstract

The utility model provides a long-life battery capable of improving over-current capability and electric equipment. The long-life battery comprises a shell; a positive tab and a negative tab are arranged on the battery cell; the battery cell is wound on the central shaft, is insulated from the shell and comprises a first shaft body, an insulating part and a second shaft body, the insulating part is arranged between the first shaft body and the second shaft body, the first shaft body is connected with the positive lug, the second shaft body is connected with the negative lug, and the first shaft body and the second shaft body respectively penetrate out of the shell. On one hand, the over-current discharge capability of the battery can be effectively improved, the application requirement of higher power is met, and on the other hand, the internal resistance of the battery can be effectively reduced, the battery is prevented from heating during large-current discharge, so that the use safety of the battery is improved, and the service life of the battery is prolonged. Compared with a conventional battery structure at the present stage, the battery structure has the advantages of low cost, flexibility in use, convenience in preparation and assembly, capability of effectively improving the over-current capability of the battery and prolonging the service life of the battery and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly to a long-life battery and an electrical equipment with improved over-current capacity. Background Art

[0002] With the wide application of lithium-ion batteries in various fields, the battery cells as the core face new challenges in terms of structural design and technical improvement. Especially in applications such as automobiles, energy storage, and mechanical equipment, the performance and safety of the batteries are crucial. Currently, lithium-ion batteries on the market are mainly divided into three structures: square aluminum shells, cylindrical steel shells, and soft packs. However, when cylindrical batteries discharge at high currents, due to the relatively large internal resistance, overheating is likely to occur, which not only reduces the battery performance but also may pose safety hazards. At the same time, during the long-term cyclic use of the battery, the electrode group may deform, further affecting the service life of the battery.

[0003] Traditional battery design and technical improvement mainly focus on aspects such as improving energy density, reducing costs, and enhancing safety. However, for the problems of battery heating during high-current discharge and deformation during long-term use, the existing solutions still have certain limitations, especially it is difficult to increase the over-current capacity of both the positive and negative electrodes simultaneously. Therefore, the development of new cylindrical lithium-ion battery designs and technologies, especially in terms of battery thermal management and high-current performance, has become an important research topic. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the over-current capacity in the prior art is limited, resulting in overheating of the battery core and affecting the service life, and to provide a long-life battery and an electrical equipment with improved over-current capacity.

[0005] To solve the above technical problem, the utility model provides a long-life battery with improved over-current capacity, which includes: a housing; a battery core disposed inside the housing, with a positive electrode tab and a negative electrode tab provided thereon; a central axis around which the battery core is wound and is insulated from the housing, which includes a first shaft body, an insulating member, and a second shaft body, the insulating member being disposed between the first shaft body and the second shaft body, wherein the first shaft body is connected to the positive electrode tab and passes through one end of the housing, and the second shaft body is connected to the negative electrode tab and passes through the other end of the housing.

[0006] In an embodiment of the utility model, it further includes an electrical connection assembly, which includes a positive electrode assembly and a negative electrode assembly. The first shaft body is electrically connected to the positive electrode assembly and is insulated from the housing through the positive electrode assembly; the second shaft body is electrically connected to the negative electrode assembly and is insulated from the housing through the negative electrode assembly.

[0007] In an embodiment of the present utility model, the positive electrode assembly includes a first current collector plate and a first cover plate. The first current collector plate and the first cover plate are respectively electrically connected to the first shaft body, and the first cover plate is insulatingly connected to the housing; the negative electrode assembly includes a second current collector plate and a second cover plate. The second current collector plate and the second cover plate are respectively electrically connected to the second shaft body, and the second cover plate is insulatingly connected to the housing.

[0008] In an embodiment of the present utility model, it further includes an insulating mechanism. The insulating mechanism includes a sealing ring and a plastic part. The plastic parts are respectively arranged between the first current collector plate and the first cover plate, and between the second current collector plate and the second cover plate; the sealing rings are respectively arranged between the first cover plate and the housing, and between the second cover plate and the housing.

[0009] In an embodiment of the present utility model, the central shaft is arranged as a hollow shaft body, and infiltration through holes are provided thereon.

[0010] In an embodiment of the present utility model, multiple infiltration through holes are evenly distributed on the first shaft body, the insulating part, and the second shaft body.

[0011] In an embodiment of the present utility model, the first shaft body, the insulating part, and the second shaft body are detachably connected to each other.

[0012] In an embodiment of the present utility model, internal threads are provided inside the insulating part, and external threads that cooperate with the internal threads are respectively provided on the first shaft body and the second shaft body.

[0013] In an embodiment of the present utility model, the first shaft body includes a first body and a first external thread part. The first external thread part is arranged at one end of the first shaft body facing the insulating part and extends towards the insulating part along the extending direction of the first shaft body. The first external thread part penetrates through one end of the insulating part and extends into the interior of the insulating part, and is in threaded connection with the internal thread. The second shaft body includes a second body and a second external thread part. The second external thread part is arranged at one end of the second shaft body facing the insulating part and extends towards the insulating part along the extending direction of the second shaft body. The second external thread part penetrates through the other end of the insulating part and extends into the interior of the insulating part, and is in threaded connection with the internal thread.

[0014] The present utility model also provides an electrical device, which includes the above-mentioned long-life battery with improved overcurrent capacity.

[0015] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0016] The long-life battery and electrical equipment with improved overcurrent capacity according to the present utility model improve the overcurrent areas of both the positive electrode tab and the negative electrode tab through the setting of the central axis. On the one hand, it can effectively enhance the overcurrent discharge capacity of the battery to meet the application requirements of higher power. On the other hand, it can also effectively reduce the internal resistance of the battery, avoid the battery from heating during high-current discharge, thereby improving the use safety and service life of the battery. Compared with the conventional battery structure at the present stage, the present application has the advantages of low cost, flexible use, easy preparation and assembly, effective improvement of the battery's overcurrent capacity, and extension of the battery's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model in conjunction with the drawings.

[0018] Figure 1 is a schematic internal structure diagram of the long-life battery with improved overcurrent capacity in the preferred embodiment of the present utility model;

[0019] Figure 2 is Figure 1 a schematic structure diagram of the central axis in the long-life battery with improved overcurrent capacity shown;

[0020] Figure 3 is Figure 1 an exploded view of the structure of the central axis in the long-life battery with improved overcurrent capacity shown.

[0021] Description of the reference numerals in the drawings: 100, central axis; 110, first shaft body; 111, first external thread portion; 112, first body; 120, insulating member; 121, internal thread; 130, second shaft body; 131, second external thread portion; 132, second body; 200, electrical connection assembly; 210, positive electrode assembly; 211, first current collector plate; 212, first cover plate; 220, negative electrode assembly; 221, second current collector plate; 222, second cover plate; 300, housing; 400, battery cell. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0023] Embodiment 1

[0024] Refer to Figures 1 to 3As shown in the figure, this embodiment provides a long-life battery with improved overcurrent capacity, which includes: a housing 300; a battery cell 400 disposed inside the housing 300, with a positive tab and a negative tab provided thereon; a central axis 100 around which the battery cell 400 is wound and is insulated from the housing 300. The central axis 100 includes a first shaft body 110, an insulating member 120, and a second shaft body 130. The insulating member 120 is disposed between the first shaft body 110 and the second shaft body 130. Among them, the first shaft body 110 is connected to the positive tab and passes through one end of the housing 300, and the second shaft body 130 is connected to the negative tab and passes through the other end of the housing 300.

[0025] The long-life battery with improved overcurrent capacity in this embodiment improves the overcurrent areas of both the positive tab and the negative tab through the setting of the central axis 100. On the one hand, it can effectively improve the overcurrent discharge capacity of the battery and meet the application requirements of higher power. On the other hand, it can also effectively reduce the internal resistance of the battery, avoid the battery from heating up during high-current discharge, thereby improving the use safety and service life of the battery. Compared with the conventional battery structure at the present stage, this application has the advantages of low cost, flexible use, easy preparation and assembly, effectively improving the overcurrent capacity of the battery, and extending the service life of the battery.

[0026] See Figure 1 As shown in the figure, the battery in this embodiment is a cylindrical battery, and its housing 300 is correspondingly set as a hollow cylindrical component. Both ends of the housing 300 in this embodiment are provided with openings to facilitate the assembly of components such as the battery cell 400 and the central axis 100. In this embodiment, the positive tab and the negative tab of the battery cell 400 are respectively disposed at both ends in the length direction of the battery cell 400. The central axis 100 passes through the battery cell 400 along the length direction of the battery, and both ends of the central axis 100 are respectively connected to the positive tab and the negative tab, thereby increasing the overcurrent area of the tabs. Specifically, the first shaft body 110 in this embodiment is used to connect the positive tab, the second shaft body 130 is used to connect the negative tab, and the insulating member 120 is used to separate the first shaft body 110 and the second shaft body 130, thereby avoiding short circuit between the positive and negative tabs.

[0027] See Figure 1As shown in the figure, this embodiment further includes an electrical connection component 200. The electrical connection component 200 includes a positive electrode component 210 and a negative electrode component 220. The first shaft body 110 is electrically connected to the positive electrode component 210 and is insulated from the housing 300 through the positive electrode component 210. The second shaft body 130 is electrically connected to the negative electrode component 220 and is insulated from the housing 300 through the negative electrode component 220. Further, the positive electrode component 210 includes a first current collector plate 211 and a first cover plate 212. The first current collector plate 211 and the first cover plate 212 are respectively electrically connected to the first shaft body 110, and the first cover plate 212 is insulated from the housing 300. The negative electrode component 220 includes a second current collector plate 221 and a second cover plate 222. The second current collector plate 221 and the second cover plate 222 are respectively electrically connected to the second shaft body 130, and the second cover plate 222 is insulated from the housing 300. Thus, after the central shaft 100 is connected to the tab of the battery cell 400, it can further increase the current-carrying area of the tab through the electrical connection component 200 and improve the connection stability of the central shaft 100 at the same time.

[0028] To prevent an electrical connection from being formed between the battery cell 400 and the housing 300, this embodiment further includes an insulating mechanism. The insulating mechanism includes a sealing ring and a plastic part. The plastic part is respectively arranged between the first current collector plate 211 and the first cover plate 212, and between the second current collector plate 221 and the second cover plate 222. The sealing ring is respectively arranged between the first cover plate 212 and the housing 300, and between the second cover plate 222 and the housing 300.

[0029] See Figure 2 and Figure 3As shown, in this embodiment, the first shaft body 110, the insulating member 120, and the second shaft body 130 are detachably connected to each other. Further, internal threads 121 are provided inside the insulating member 120, and external threads that cooperate with the internal threads 121 are respectively provided on the first shaft body 110 and the second shaft body 130. Specifically, the first shaft body 110 includes a first body 112 and a first external thread portion 111. The first external thread portion 111 is provided at one end of the first shaft body 110 facing the insulating member 120 and extends toward the insulating member 120 along the extending direction of the first shaft body 110. The first external thread portion 111 penetrates from one end of the insulating member 120 into the inside of the insulating member 120 and is connected in cooperation with the internal threads 121. The second shaft body 130 includes a second body 132 and a second external thread portion 131. The second external thread portion 131 is provided at one end of the second shaft body 130 facing the insulating member 120 and extends toward the insulating member 120 along the extending direction of the second shaft body 130. The second external thread portion 131 penetrates from the other end of the insulating member 120 into the inside of the insulating member 120 and is connected in cooperation with the internal threads 121.

[0030] The central shaft 100 in this embodiment is provided as a hollow shaft body, thereby being able to reduce the overall mass of the battery. At the same time, a plurality of infiltration through-holes are provided on the surface of the central shaft 100, thereby being able to improve the overall infiltration ability of the battery cell 400 and the central shaft 100. Good infiltration performance ensures that the electrolyte can uniformly cover the electrode surface, which is beneficial to the ion transfer between the electrode and the electrolyte, thereby improving the charge and discharge efficiency and cycle stability of the battery. In addition, it can also reduce the occurrence probability of safety problems such as battery thermal runaway. Further, in this embodiment, infiltration through-holes are uniformly distributed on the first shaft body 110, the insulating member 120, and the second shaft body 130. In other embodiments, the number, shape, size, and setting position of the infiltration through-holes can be adaptively adjusted according to actual use requirements, and the present utility model does not make specific limitations thereto.

[0031] Embodiment Two

[0032] This embodiment provides an electrical device, which includes the long-life battery with improved overcurrent capacity described above. The electrical device in this embodiment can be an automobile, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The automobile can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, a planer, etc. The embodiments of the present invention do not impose special restrictions on the above electrical devices.

[0033] In summary, for the long-life battery with improved overcurrent capacity and the electrical device described in this utility model, the overcurrent areas of the positive electrode tab and the negative electrode tab are simultaneously increased by the setting of the central axis 100. On the one hand, it can effectively improve the overcurrent discharge capacity of the battery and meet the application requirements of higher power. On the other hand, it can also effectively reduce the internal resistance of the battery, avoid the battery from heating during high-current discharge, thereby improving the use safety and service life of the battery. Compared with the conventional battery structure at the present stage, this application has the advantages of low cost, flexible use, convenient preparation and assembly, effectively improving the overcurrent capacity of the battery and extending the service life of the battery.

[0034] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creation of this utility model.

Claims

1. A long-life battery with improved current capacity, characterized in that: include: case; A battery cell, the battery cell is arranged inside the shell and is provided with a positive electrode ear and a negative electrode ear; The battery cell is wound on the central axis and is insulated from the shell, and includes a first shaft, an insulating member and a second shaft, wherein the insulating member is arranged between the first shaft and the second shaft, wherein the first shaft is connected to the positive electrode ear and passes through one end of the shell, and the second shaft is connected to the negative electrode ear and passes through the other end of the shell.

2. The long-life battery with improved current capacity according to claim 1, characterized in that: It also includes an electrical connection component, which includes a positive electrode component and a negative electrode component. The first shaft is electrically connected to the positive electrode component and is insulated and connected to the shell through the positive electrode component; the second shaft is electrically connected to the negative electrode component and is insulated and connected to the shell through the negative electrode component.

3. The long-life battery with improved current capacity according to claim 2, characterized in that: The positive electrode assembly includes a first current collecting disc and a first cover plate, the first current collecting disc and the first cover plate are respectively electrically connected to the first shaft, and the first cover plate is insulated and connected to the shell; the negative electrode assembly includes a second current collecting disc and a second cover plate, the second current collecting disc and the second cover plate are respectively electrically connected to the second shaft, and the second cover plate is insulated and connected to the shell.

4. The long-life battery with improved current capacity according to claim 3, characterized in that: It also includes an insulating mechanism, which includes a sealing ring and a plastic part. The plastic part is respectively arranged between the first collecting disk and the first cover plate, and between the second collecting disk and the second cover plate; the sealing ring is respectively arranged between the first cover plate and the shell, and between the second cover plate and the shell.

5. The long-life battery with improved current capacity according to claim 1, characterized in that: The central axis is configured as a hollow shaft body, on which a wetting through hole is provided.

6. The long-life battery with improved current capacity according to claim 5, characterized in that: The plurality of wetting through holes are evenly distributed on the first shaft body, the insulating member and the second shaft body.

7. The long-life battery with improved current capacity according to claim 1, characterized in that: The first shaft, the insulating component and the second shaft are detachably connected.

8. The long-life battery with improved current capacity according to claim 1, characterized in that: The insulating member is provided with an internal thread, and the first shaft body and the second shaft body are respectively provided with an external thread matching the internal thread.

9. The long-life battery with improved current capacity according to claim 8, characterized in that: The first shaft body includes a first main body and a first external threaded portion, the first external threaded portion is arranged at one end of the first shaft body facing the insulating member, and extends toward the insulating member along the extension direction of the first shaft body, the first external threaded portion is penetrated from one end of the insulating member to the inside of the insulating member, and is matched with the internal thread, the second shaft body includes a second main body and a second external threaded portion, the second external threaded portion is arranged at one end of the second shaft body facing the insulating member, and extends toward the insulating member along the extension direction of the second shaft body, the second external threaded portion is penetrated from the other end of the insulating member to the inside of the insulating member, and is matched with the internal thread.

10. An electrical equipment, characterized in that: A long-life battery with improved current capacity as claimed in any one of claims 1 to 9.

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