Electrical connection structure, battery and electric device

Abstract

The application relates to the technical field of batteries, and provides an electric connection structure, a battery, a power utilization device and a battery monomer, wherein the electric connection structure comprises: a cover shell which has an opening and is detachably arranged on a pole of a battery monomer through the opening; and an overcurrent component, one end of the overcurrent component is located in the cover shell and is arranged in correspondence with the opening, the one end is used for abutting against the pole, and the other end of the overcurrent component is located outside the cover shell and is used for electrically connecting with a device outside the cover shell. Through the technical scheme, the risk of liquid leakage of the battery can be reduced, so that the scrappage rate of the battery manufacturing is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to an electrical connection structure, a battery, and an electrical device. Background Technology

[0002] From a market perspective, the application of power batteries is becoming increasingly widespread. Power batteries typically consist of multiple individual cells, which need to be connected in series, parallel, or series-parallel via electrical connectors. In related technologies, when connecting at least two individual cells, a busbar is usually directly welded to the terminals of the two cells, which introduces a risk of leakage and results in a high rate of battery failure. Summary of the Invention

[0003] The purpose of this application is to provide an electrical connection structure, a battery, and an electrical device to reduce the risk of battery leakage, thereby reducing the scrap rate of battery manufacturing.

[0004] In a first aspect, embodiments of this application provide an electrical connection structure, comprising: a housing having an opening, the housing being detachably mounted on the terminal post of a battery cell through the opening; and a current-passing component, one end of which is located inside the housing and corresponding to the opening for contacting the terminal post, and the other end of which is located outside the housing for electrical connection with a device outside the housing.

[0005] The electrical connection structure includes a housing and a current-carrying component. The housing has an opening for covering the terminal of the battery cell, and the housing is detachably connected to the terminal. One end of the current-carrying component is located inside the housing to abut against the terminal of the battery cell, while the other end is located outside the housing for electrical connection to external devices. This allows external devices, such as busbars, to be electrically connected to the terminal of the battery cell, eliminating the need for direct welding of busbars and other electrical connectors to the battery cell in existing technologies. The detachable connection between the housing and the terminal of the electrical connection structure enables current transmission. When the electrical connection structure is damaged, there is no need to replace the battery cell, reducing the battery scrap rate and thus lowering battery production costs.

[0006] In some embodiments, a connecting hole is provided on the wall surface of the cover corresponding to the opening, and the flow-through component is disposed through the connecting hole.

[0007] By setting a connecting hole on the wall surface corresponding to the opening of the casing, the current-carrying component can pass through the connecting hole so that the two ends of the current-carrying component can be located inside and outside the casing respectively. This enables the current to be transmitted to the device outside the casing through the pole and the current-carrying component. The structure and principle are relatively simple and easy to implement.

[0008] In some embodiments, the current-carrying component includes: an internal sub-current-carrying component connected to one end of the current-carrying component for contacting the electrode post; and an external sub-current-carrying component connected to the other end of the current-carrying component for electrical connection to a device outside the housing; wherein the cross-sectional areas of the internal sub-current-carrying component and the external sub-current-carrying component are larger than the cross-sectional area of ​​the current-carrying component.

[0009] The current-carrying component includes an internal sub-current-carrying component and an external sub-current-carrying component. The internal sub-current-carrying component is connected to the end of the current-carrying component located inside the casing and is used to abut against the terminal of the battery cell. The external sub-current-carrying component is connected to the end of the current-carrying component located outside the casing and is used for electrical connection to devices outside the casing. It is understood that the cross-sectional dimensions of both the internal and external sub-current-carrying components are larger than the diameter of the connecting hole, thereby preventing the current-carrying component from detaching from the connecting hole. Furthermore, since the internal sub-current-carrying component needs to be electrically connected to the terminal of the battery cell, setting the cross-sectional area of ​​the internal sub-current-carrying component to be larger than that of the external sub-current-carrying component effectively ensures the contact area between the internal sub-current-carrying component and the terminal, thus ensuring the current-carrying area of ​​the current-carrying component.

[0010] In some embodiments, the electrical connection structure further includes: an elastic element sleeved on the flow element, wherein both ends of the elastic element abut against the inner top wall surface of the housing and the internal sub-flow element, respectively.

[0011] By fitting an elastic element onto the current-carrying component, with both ends of the elastic element abutting against the inner top wall of the housing and the upper surface of the internal sub-current-carrying component respectively, when the housing is placed on the pole, the internal sub-current-carrying component can always maintain contact with the pole under the elastic force of the elastic element. This ensures that the devices outside the housing can always maintain electrical connection with the pole through the current-carrying component, thus improving the reliability of the product.

[0012] In some embodiments, a gap is provided between the internal sub-flow member and the inner wall surface of the housing.

[0013] By setting a gap between the internal sub-flow component and the inner wall of the casing, contact between the internal sub-flow component and the inner wall of the casing can be avoided, thereby preventing the internal sub-flow component from getting stuck with the inner wall of the casing when it moves towards the pole under the elastic force of the elastic component.

[0014] In some embodiments, the internal sub-flow plate is provided with at least one weight reduction hole.

[0015] Provided that the flow area of ​​the internal sub-flow plate and the pole is sufficient, at least one weight reduction hole can be provided on the internal sub-flow component to reduce the weight of the product and reduce production costs.

[0016] In some embodiments, the housing is an insulating element.

[0017] If the casing is an insulating component, it can prevent other structures outside the casing from coming into contact with the poles and internal sub-current flow components inside the casing, thereby ensuring the safety of the product when it is placed on the poles.

[0018] Secondly, embodiments of this application provide a battery, comprising: at least two battery cells; at least two electrical connection structures as described in any one of the embodiments of the first aspect, wherein the housings of the electrical connection structures are detachably disposed on the terminals of the battery cells; and conductive connectors, which are electrically connected to the other ends of the current-carrying components of the two electrical connection structures respectively.

[0019] The battery provided in the second aspect of this application includes the electrical connection structure described in any one of the first aspect embodiments, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0020] In some embodiments, the inner wall of the housing is provided with a connecting portion, and the outer periphery of the pole is provided with a mating portion for engaging with the connecting portion. The connecting portion is connected to the mating portion, so that the housing and the pole are detachably connected.

[0021] By providing a connecting part on the inner wall of the casing and a mating part on the outer periphery of the terminal post, the connecting part can be a groove or an internal thread, and the mating part can be a protrusion that mates with the groove or an external thread that matches the internal thread. The connecting part and the mating part are connected to each other, so that the casing and the terminal post can be detachably connected, thereby allowing the casing or battery cell to be repaired and replaced separately, effectively reducing the production cost of the product.

[0022] In some embodiments, one of the connecting portion and the mating portion is a limiting groove, and the other is a limiting protrusion adapted to the limiting groove. The limiting protrusion is inserted into the limiting groove, so that the cover and the pole are detachably connected.

[0023] That is, the connecting part is a limiting groove, and the mating part is a limiting protrusion that matches the limiting groove, or the connecting part is a limiting protrusion and the mating part is a limiting groove that matches the limiting protrusion. When the cover is placed on the pole post, the limiting protrusion can be inserted into the limiting groove, thereby realizing the detachable connection between the cover and the pole post.

[0024] In some embodiments, the limiting groove includes an installation section, a horizontal transition section, and a locking section connected in sequence. One end of the installation section is connected to the bottom end face of the cover, and the other end is connected to the horizontal transition section. One end of the locking section is connected to one end of the horizontal transition section, and the other end is spaced apart from the bottom end face of the cover.

[0025] The limiting groove includes a mounting section, a horizontal transition section, and a locking section connected in sequence. One end of the mounting section is connected to the bottom end face of the cover, so that the limiting protrusion on the pole can be inserted into the mounting section from the bottom end face of the cover and enter the horizontal transition section along the extension direction of the mounting section. Then, by rotating the cover, the limiting protrusion enters the locking section, and finally the limiting protrusion is locked in the locking section to prevent the cover from rotating relative to the pole.

[0026] In some embodiments, there are multiple limiting grooves, which are spaced apart on the inner wall of the cover; the number of limiting protrusions is the same as the number of limiting grooves, and they are spaced apart on the outer periphery of the pole corresponding to the multiple limiting grooves.

[0027] By setting multiple limiting grooves on the inner wall of the cover and multiple limiting protrusions on the outer periphery of the pole, the reliability of the connection between the cover and the pole can be further improved, and the rotation of the cover relative to the pole can be further prevented.

[0028] In some embodiments, each of the battery cell has terminals at both ends, and the cover is detachably mounted on the terminals.

[0029] Both ends of the battery cell are provided with terminals, including a positive terminal and a negative terminal. There are two electrical connection structures. The covers of the two electrical connection structures are respectively covered on the two terminals. The conductive connectors are electrically connected to the ends of the two current-passing components located outside the covers.

[0030] Thirdly, embodiments of this application provide an electrical device including a battery as described in any one of the embodiments of the second aspect, the battery being used to supply power to the electrical device.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0034] Figure 2 This is an exploded structural diagram of a battery according to some embodiments of this application;

[0035] Figure 3 This is a schematic diagram of the assembly structure of the battery cell and the electrical connection structure provided in the embodiments of this application;

[0036] Figure 4 A top view of the battery cell provided in an embodiment of this application;

[0037] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction;

[0038] Figure 6 for Figure 5 Enlarged structural diagram of section B in the middle;

[0039] Figure 7 This is a schematic diagram of the electrical connection structure provided in the embodiments of this application;

[0040] Figure 8 This is a cross-sectional view of the electrical connection structure provided in an embodiment of this application. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0047] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0050] A power battery typically consists of multiple battery cells, which are connected in series, parallel, or series-parallel via electrical connectors.

[0051] The inventors discovered that when connecting at least two battery cells, the current connectors are directly welded to the terminals of the two battery cells using electrical connectors such as busbars. This welding process can easily damage the battery cells or pose a risk of leakage. In addition, the electrical connectors and battery cells cannot be directly disassembled after welding and need to be replaced simultaneously, which greatly increases the production cost of power batteries.

[0052] Based on the above considerations, in order to solve the problem of easy damage and leakage caused by directly welding electrical connectors such as busbars to the terminals of battery cells, the inventors, after in-depth research, designed an electrical connection structure. This structure involves setting up a cover that is detachably connected to the terminals of the battery cells, and installing a current-passing component on the cover. One end of the current-passing component is located inside the cover to abut against the terminal, while the other end is located outside the cover to electrically connect with devices outside the cover. In this way, devices outside the cover can transmit current through electrical connection with the current-passing component on the cover. When the electrical connection structure is damaged, only the individual component needs to be replaced, without replacing the battery cell, thus reducing the battery scrap rate and helping to reduce the production cost of power batteries.

[0053] The electrical connection structure disclosed in this application can be used, but is not limited to, in batteries of electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the electrical connection structure, battery cells, and batteries disclosed in this application. This helps reduce the risk of battery leakage, lowers the battery failure rate, improves battery safety, and reduces battery production costs.

[0054] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0055] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0056] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0057] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a accommodating space for the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the accommodating space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0059] In battery 100, there can be multiple battery cells 20, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the multiple battery cells 20 is housed within the casing 10. Alternatively, battery 100 can also be composed of multiple battery cells 20 first connected in series, parallel, or a combination thereof to form battery modules, and then these battery modules are connected in series, parallel, or a combination thereof to form a whole, which is also housed within the casing 10. Battery 100 may also include electrical connectors for achieving electrical connections between the multiple battery cells 20. A battery cell 20 refers to the smallest unit that makes up battery 100. Figure 3 The battery cell 20 includes an electrical connection structure 30 and a conductive connector 40. The cover of the electrical connection structure 30 is installed on the terminal post 21 of the battery cell 20. The conductive connector 40 is used to electrically connect with two adjacent battery cells 20 through the conductive connector 30.

[0060] Each battery cell 20 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0061] Please refer to Figures 3 to 8 , Figure 3 This is a schematic diagram of the electrical connection structure and the assembly structure of a battery cell provided in some embodiments of this application; Figure 4 This is a top view schematic diagram of the electrical connection structure provided in some embodiments of this application; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction; Figure 6 for Figure 5 Enlarged structural diagram of section B in the middle; Figure 7 This is a schematic diagram of the electrical connection structure provided in the embodiments of this application; Figure 8 This is a cross-sectional view of the electrical connection structure provided in an embodiment of this application. Figure 7 and Figure 8 As shown, this application embodiment provides an electrical connection structure 30, including: a cover 31 having an opening 311, the cover 31 being detachably mounted on the terminal post 21 of the battery cell 20 through the opening 311; and a current-passing member 32, one end of which is located inside the cover 31 and corresponding to the opening 311 for contacting the terminal post 21, and the other end of which is located outside the cover 31 for electrical connection with devices outside the cover 31.

[0062] The shape of the cover 31 is adapted to the terminal post 21 of the battery cell 20, and has an opening 311 for covering the terminal post 21 of the battery cell 20. The cover 31 can be detachably connected to the terminal post 21 of the battery cell 20 through the opening 311.

[0063] The current-carrying component 32 is a conductive component used to electrically connect devices such as busbars outside the housing 31.

[0064] In this design, one end of the current-carrying component 32 is located inside the casing 31 and is used to abut against the terminal 21 of the battery cell 20. The other end is located outside the casing 31 and is used to electrically connect with devices outside the casing 31. This allows devices outside the casing 31, such as busbars, to be electrically connected to the terminal 21 of the battery cell 20. This eliminates the method of directly welding electrical connectors such as busbars to the battery cell 20 in the prior art, reducing the risk of leakage caused by directly welding electrical connectors such as busbars to the terminal 21 of the battery cell 20, thereby reducing the scrap rate of the battery and thus reducing the production cost of the battery.

[0065] Please refer to Figure 7 In some embodiments, a connecting hole 36 is provided on the wall surface corresponding to the opening 311 of the cover 31, and the flow member 32 is provided through the connecting hole 36.

[0066] The connecting hole is a through hole that connects the inside and outside of the cover 31. The shape of the connecting hole 36 is not limited; for example, the shape of the connecting hole 36 can be square or circular, etc.

[0067] By providing a connecting hole 36 on the wall surface corresponding to the opening 311 of the cover 31, the flow member 32 can pass through the connecting hole so that the two ends of the flow member 32 can be located inside and outside the cover 31 respectively. The structure and principle are relatively simple and easy to implement.

[0068] Please refer to Figure 6 and Figure 8 According to some embodiments of this application, the current-carrying component 32 includes: an internal sub-current-carrying component connected to one end of the current-carrying component 32 for contacting the terminal 21; and an external sub-current-carrying component 321 connected to the other end of the current-carrying component 32 for electrical connection to a device outside the housing 31; wherein the cross-sectional areas of the internal sub-current-carrying component 322 and the external sub-current-carrying component 321 are larger than the cross-sectional area of ​​the current-carrying component 32.

[0069] The internal sub-flow element 32322 is located inside the housing 31, and the external sub-flow element 321 is located outside the housing 31.

[0070] For example, both the internal sub-flow element 322 and the external sub-flow element 321 have a sheet-like structure, which helps to reduce their footprint.

[0071] By connecting the inner sub-current flow element 322 to the end of the current flow element 32 located inside the casing 31 and abutting against the terminal 21 of the battery cell 20, and connecting the outer sub-current flow element to the end of the current flow element 32 located outside the casing 31 and electrically connecting to the device outside the casing 31, the device outside the casing 31 can be electrically connected to the terminal 21. It is understood that the cross-sectional dimensions of both the inner sub-current flow element 322 and the outer sub-current flow element 321 are larger than the diameter of the connecting hole. Since the inner sub-current flow element 322 needs to be electrically connected to the terminal 21 of the battery cell 20, setting the cross-sectional area of ​​the inner sub-current flow element 322 to be larger than the cross-sectional area of ​​the outer sub-current flow element 321 can effectively ensure the contact area between the inner sub-current flow element 322 and the terminal 21, thereby ensuring the current flow area of ​​the current flow element 32.

[0072] Please refer to Figure 6 and Figure 8 According to some embodiments of this application, the electrical connection structure 30 further includes: an elastic member 34, sleeved on the flow member 32, and the two ends of the elastic member 34 abutting against the inner top wall surface of the cover 31 and the inner sub-flow member 322, respectively.

[0073] For example, the elastic element 34 can be a spring or rubber, etc.

[0074] By sleeved with an elastic element 34 on the current-carrying component 32, and with both ends of the elastic element 34 abutting against the inner top wall of the housing 31 and the upper surface of the internal sub-current-carrying component 322 respectively, when the housing 31 is placed on the pole post 21, the internal sub-current-carrying component 322 can always maintain contact with the pole post 21 under the elastic force of the elastic element 34, thereby ensuring that the devices outside the housing 31 can always maintain electrical connection with the pole post 21 through the current-carrying component 32, thus improving the reliability of the product.

[0075] Please refer to Figure 8 According to some embodiments of this application, a gap 33 is provided between the internal sub-flow member 322 and the inner wall surface of the cover 31.

[0076] The inner wall surface of the cover 31, that is, the circumferential surface inside the cover 31, is connected to the inner top wall surface of the cover 31 corresponding to the opening 311.

[0077] By providing a gap 33 between the internal sub-flow component 322 and the inner wall of the casing 31, contact between the internal sub-flow component 322 and the inner wall of the casing 31 can be avoided, thereby preventing the internal sub-flow component 322 from getting stuck with the inner wall of the casing 31 when it moves toward the pole post 21 under the elastic force of the elastic component 34.

[0078] Please refer to Figure 8 According to some embodiments of this application, the internal sub-flow member 322 is provided with at least one weight reduction hole.

[0079] For example, there are multiple weight reduction holes, which are spaced apart circumferentially along the inner sub-flow member 322.

[0080] While ensuring sufficient flow area between the internal sub-flow plate and the pole 21, the weight of the product is reduced and the production cost is lowered by providing at least one weight-reducing hole on the internal sub-flow component 322.

[0081] According to some embodiments of this application, the housing 31 is an insulating element.

[0082] The cover 31 is an insulating component. When the cover 31 is placed on the terminal post 21 of the battery cell 20, it can insulate and isolate the internal sub-current flow component 322 and the terminal post 21 of the battery cell 20 from the outside of the cover 31, preventing other structures outside the cover 31 from coming into contact with the terminal post 21 and the internal sub-current flow component 322 inside the cover 31, thereby ensuring the safety of the product when it is placed on the terminal post 21.

[0083] Please refer to Figure 2 and Figure 3 According to some embodiments of this application, this application also provides a battery 100, including at least two battery cells 20; and at least two electrical connection structures 30 as in any of the above embodiments, wherein the housing 31 of the electrical connection structure 30 is detachably mounted on the terminal post 21 of the battery cell 20; and conductive connectors 40 are electrically connected to the other end of the current-passing member 32 of the two electrical connection structures 30 respectively.

[0084] The battery provided in this application embodiment includes the electrical connection structure described in any of the above embodiments, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0085] According to some embodiments of this application, the inner wall of the cover 31 is provided with a connecting part, and the outer periphery of the pole post 21 is provided with a mating part for connecting with the connecting part. The connecting part and the mating part are connected, so that the cover 31 and the pole post 21 are detachably connected.

[0086] For example, the connecting part can be a groove or an internal thread, and the mating part can be a protrusion that mates with the groove, or an external thread that is adapted to the internal thread.

[0087] By providing a connecting part on the inner wall of the casing 31 and a mating part on the outer periphery of the pole 21, the connecting part and the mating part are connected to each other, so that the casing 31 and the pole 21 can be detachably connected. This allows the casing 31 or the battery cell 20 to be repaired or replaced separately, effectively reducing the production cost of the product.

[0088] Please refer to Figure 6 and Figure 8According to some embodiments of this application, one of the connecting part and the mating part is a limiting groove 35, and the other is a limiting protrusion 22 adapted to the limiting groove 35. The limiting protrusion 22 is inserted into the limiting groove 35, so that the cover 31 and the pole post 21 are detachably connected.

[0089] That is, the connecting part is a limiting groove 35, and the mating part is a limiting protrusion 22 that is adapted to the limiting groove 35, or the connecting part is a limiting protrusion 22, and the mating part is a limiting groove 35 that is adapted to the limiting protrusion 22. When the cover 31 is placed on the pole post 21, the limiting protrusion 22 can be inserted into the limiting groove 35, thereby realizing the detachable connection between the cover 31 and the pole post 21.

[0090] Please refer to Figure 8 According to some embodiments of this application, the limiting groove 35 includes an installation section 351, a horizontal transition section 352 and a locking section 353 connected in sequence. One end of the installation section 351 is connected to the bottom end face of the cover 31 and the other end is connected to the horizontal transition section 352. One end of the locking section 353 is connected to one end of the horizontal transition section 352 and the other end is spaced apart from the bottom end face of the cover 31.

[0091] The limiting groove 35 includes a mounting section 351, a horizontal transition section, and a locking section 353 connected in sequence. One end of the mounting section 351 is connected to the bottom end face of the cover 31, so that the limiting protrusion 22 on the pole post 21 can be inserted into the mounting section 351 from the bottom end face of the cover 31 and enter the horizontal transition section 352 along the extension direction of the mounting section 351. Then, by rotating the cover 31, the limiting protrusion 22 enters the locking section 353, and finally the limiting protrusion 22 is locked in the locking section 353 to prevent the cover 31 from rotating relative to the pole post 21.

[0092] According to some embodiments of this application, there are multiple limiting grooves 35, which are spaced apart on the inner wall of the cover 31; the number of limiting protrusions 22 is the same as that of limiting grooves 35, and they are spaced apart on the outer periphery of the pole post 21 corresponding to the multiple limiting grooves 35.

[0093] By providing multiple limiting grooves 35 on the inner wall of the cover 31 and multiple limiting protrusions 22 on the outer periphery of the pole post 21, the multiple limiting protrusions 22 are respectively connected to the multiple limiting grooves 35, thereby further improving the reliability of the connection between the cover 31 and the pole post 21 and further preventing the cover 31 from rotating relative to the pole post 21.

[0094] According to some embodiments of this application, both ends of the battery cell 20 are provided with terminals 21, and the electrical connection structure 30 is detachably covered on the terminals 21.

[0095] Both ends of the battery cell 20 are provided with terminals 21, including a positive terminal and a negative terminal. There are two electrical connection structures 30. The covers 31 of the two electrical connection structures 30 are respectively covered on the two terminals 21. The conductive connectors 40 are electrically connected to the ends of the two current-passing components 32 located outside the covers 31.

[0096] Please refer to Figures 5 to 8 According to some embodiments of this application, this application provides a battery, including an electrical connection structure 30 and at least two battery cells 20. The electrical connection structure 30 is used to electrically connect at least two battery cells 20. The electrical connection structure 30 includes a housing 31 and a current-carrying component 32. The housing 31 has an opening 311, and a limiting groove 35 is provided on the inner surface of the housing 31. A limiting protrusion 22 is provided on the outer periphery of the terminal post 21 of the battery cell 20. The limiting protrusion 22 is used to insert into the limiting groove 35, so that the housing 31 and the terminal post 21 are detachably connected. The current-carrying component 32 includes an inner sub-current-carrying plate and an outer sub-current-carrying plate connected to the inner sub-current-carrying plate. The inner sub-current-carrying plate is disposed inside the housing 31 and is used to abut against the terminal post 21 of the battery cell 20. The outer sub-current-carrying plate is disposed outside the housing 31 and is used to electrically connect to a busbar outside the housing 31. A spring is provided between the inner sub-flow vane and the inner top wall of the casing 31. The spring is in a compressed state to keep the inner sub-flow vane in contact with the pole post 21. Furthermore, the cross-sectional area of ​​the inner sub-flow vane is larger than that of the outer sub-flow vane, and the inner sub-flow vane is provided with a plurality of weight reduction holes spaced circumferentially along the inner sub-flow vane.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrical connection structure, characterized in that, include: A cover having an opening, the cover being detachably mounted on the terminal post of a battery cell through the opening; A current-passing component, one end of which is located inside the housing and corresponding to the opening for contact with the electrode post, and the other end of which is located outside the housing for electrical connection with a device outside the housing; A connecting hole is provided on the wall surface of the cover corresponding to the opening, and the flow-through component is disposed through the connecting hole; The current-carrying component includes: an internal sub-current-carrying component connected to one end of the current-carrying component for contacting the electrode post; and an external sub-current-carrying component connected to the other end of the current-carrying component for electrical connection to a device outside the housing; wherein the cross-sectional areas of the internal sub-current-carrying component and the external sub-current-carrying component are larger than the cross-sectional area of ​​the current-carrying component. The electrical connection structure further includes an elastic element, sleeved on the flow-through element, with both ends of the elastic element abutting against the inner top wall of the housing and the internal sub-flow-through element, respectively.

2. The electrical connection structure according to claim 1, characterized in that, A gap is provided between the internal sub-flow component and the inner wall of the casing.

3. The electrical connection structure according to claim 1, characterized in that, The internal sub-flow component is provided with at least one weight reduction hole.

4. The electrical connection structure according to any one of claims 1-3, characterized in that, The casing is an insulating component.

5. A battery, characterized in that, include: At least two battery cells; At least two electrical connection structures as described in any one of claims 1-4, wherein the housings of the electrical connection structures are detachably mounted on the terminals of the battery cells; A conductive connector is electrically connected to the other end of the current-passing component of each of the two electrical connection structures.

6. The battery according to claim 5, characterized in that, The inner wall of the cover is provided with a connecting part, and the outer periphery of the pole is provided with a mating part for connecting with the connecting part. The connecting part is connected to the mating part, so that the cover and the pole can be detachably connected.

7. The battery according to claim 6, characterized in that, One of the connecting part and the mating part is a limiting groove, and the other is a limiting protrusion adapted to the limiting groove. The limiting protrusion is inserted into the limiting groove, so that the cover and the pole are detachably connected.

8. The battery according to claim 7, characterized in that, The limiting groove includes an installation section, a horizontal transition section, and a locking section connected in sequence. One end of the installation section is connected to the bottom end face of the cover, and the other end is connected to the horizontal transition section. One end of the locking section is connected to one end of the horizontal transition section, and the other end is spaced apart from the bottom end face of the cover.

9. The battery according to claim 7 or 8, characterized in that, The number of the limiting grooves is multiple, and the multiple limiting grooves are spaced apart on the inner wall surface of the cover. The number of limiting protrusions is the same as the number of limiting grooves, and the multiple limiting grooves are spaced apart on the outer periphery of the pole post.

10. The battery according to any one of claims 5-8, characterized in that, Both ends of the battery cell are provided with terminals, and the cover is detachably installed on the terminals.

11. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 5-10, the battery being used to power the electrical device.

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