CN117652060A

CN117652060A - Electric connection structure, battery and power consumption device

Info

Publication number: CN117652060A
Application number: CN202280048714.2A
Authority: CN
Inventors: 赵云宝
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2024-03-05
Also published as: WO2023206510A1

Abstract

The application relates to the technical field of batteries and provides an electric connection structure, battery, power consumption device and battery monomer, wherein, the electric connection structure includes: the housing is provided with an opening, and the housing is detachably arranged on the pole of the battery cell through the opening; and one end of the overcurrent piece is positioned in the housing and corresponds to the opening, and is used for being abutted with the pole, and the other end of the overcurrent piece is positioned outside the housing and is used for being electrically connected with devices outside the housing. Through the technical scheme of this application, can reduce the weeping risk of battery to reduce the disability rate of battery manufacturing.

Description

Electric connection structure, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to an electric connection structure, a battery and an electric device.

Background

The more widely the application of power cells is seen from the development of market situation. Power cells typically include a plurality of cells that need to be connected in series, parallel, or both via electrical connections. In the related art, when at least two battery monomers are connected, the bus plate is generally utilized to be directly welded with the poles of the two battery monomers, so that the battery has a leakage risk, and the rejection rate of the battery is higher.

Disclosure of Invention

An object of the embodiment of the application is to provide an electrical connection structure, a battery and an electrical device, which are used for reducing the leakage risk of the battery, thereby reducing the rejection rate of battery manufacturing.

In a first aspect, embodiments of the present application provide an electrical connection structure, including: the housing is provided with an opening, and the housing is detachably arranged on the pole of the battery cell through the opening; and one end of the overcurrent piece is positioned in the housing and corresponds to the opening, and is used for being abutted with the pole, and the other end of the overcurrent piece is positioned outside the housing and is used for being electrically connected with devices outside the housing.

The electrical connection structure includes a housing and an overcurrent element. The housing is provided with an opening for covering the pole of the battery unit, and the housing is detachably connected with the pole of the battery unit. One end of the overcurrent piece is positioned in the housing and is used for being abutted against the battery monomer pole, and the other end of the overcurrent piece is positioned outside the housing and is used for being electrically connected with devices outside the housing, so that devices such as a bus plate and the like outside the housing are electrically connected with the battery monomer pole, the mode that the electric connecting piece such as the bus plate is directly welded with the battery monomer in the prior art is canceled, the housing and the pole of the electric connecting structure are detachably connected, current transmission is realized, the battery monomer does not need to be replaced when the electric connecting structure is damaged, the rejection rate of the battery is reduced, and the production cost of the battery is further reduced.

In some embodiments, a communication hole is provided on a wall surface of the housing corresponding to the opening, and the flow-through member is provided through the communication hole.

Through set up the intercommunicating pore on the wall that housing and opening correspond, the piece that overflows can pass the intercommunicating pore so that the both ends of piece that overflows can be located the inside and the outside of housing respectively to can realize that the electric current passes through the post and overflows the piece and transmit the device outside the housing, structure and principle are all comparatively simple, easily realize.

In some embodiments, the flow member comprises: the inner sub-overcurrent piece is connected with one end of the overcurrent piece and is used for being abutted with the pole; an external sub-overcurrent element connected with the other end of the overcurrent element and used for being electrically connected with a device outside the housing; wherein the cross-sectional area of the inner and outer sub-flow members is greater than the cross-sectional area of the flow member.

The flow-through member includes an inner sub-flow-through member and an outer sub-flow-through member. The inner sub-overcurrent element is connected with one end of the overcurrent element, which is positioned in the housing, and is used for being abutted against the pole post of the battery cell, and the outer sub-overcurrent element is connected with one end of the overcurrent element, which is positioned outside the housing, and is used for being electrically connected with devices outside the housing. It can be understood that the cross-sectional dimensions of the inner sub-current-passing member and the outer sub-current-passing member are both larger than the diameter of the communication hole, so that the current-passing member can be prevented from falling out of the current-passing hole, and the cross-sectional area of the inner sub-current-passing member is larger than the cross-sectional area of the outer sub-current-passing member due to the fact that the inner sub-current-passing member needs to be electrically connected with the battery cell post, so that the contact area of the inner sub-current-passing member and the post can be effectively ensured, and the current-passing area of the current-passing member is ensured.

In some embodiments, the electrical connection structure further comprises: and the elastic piece is sleeved on the overcurrent piece, and two ends of the elastic piece are respectively abutted against the inner top wall surface of the housing and the inner sub-overcurrent piece.

Through the cover establish the elastic component on the excessive current spare, and make the both ends of elastic component respectively with the interior roof face of housing and the upper surface butt of inside sub-excessive current spare, like this, when the housing cover was established on the utmost point post, inside sub-excessive current spare can remain the butt with the utmost point post all the time under the elastic force effect of elastic component to guarantee that the outside device of housing can remain the electricity through the excessive current spare all the time and be connected with the utmost point post, improved the reliability that the product was used.

In some embodiments, a gap is provided between the inner sub-flow passage and an inner sidewall surface of the housing.

Through setting up the clearance in inside sub-overflows the inside wall face of piece and housing, can avoid inside sub-overflows the inside wall face of piece and housing to take place to contact to can prevent that inside sub-overflows the condition emergence that the piece is blocked with the inside wall face of housing when moving to the utmost point post direction under the elastic force effect of elastic component.

In some embodiments, the inner sub-flow-through tab is provided with at least one lightening hole.

Under the condition of ensuring that the overflow area of the inner sub-overflow piece and the polar post is enough, at least one lightening hole can be arranged on the inner sub-overflow piece so as to reduce the weight of the product and the production cost.

In some embodiments, the housing is an insulator.

The housing is an insulating part, so that other structures outside the housing can be prevented from contacting with the pole and the inner sub-overcurrent part inside the housing, and the safety of the product when the product is covered on the pole can be ensured.

In a second aspect, embodiments of the present application provide a battery, including: at least two battery cells; at least two electrical connection structures according to any one of the embodiments of the first aspect, wherein the housings of the electrical connection structures are detachably covered on the poles of the battery cells respectively; and the conductive connecting pieces are respectively and electrically connected with the other ends of the overcurrent pieces of the two electric connecting structures.

The battery provided in the second embodiment of the present application, because of including the electrical connection structure according to any one of the first embodiments, has the technical effects of any one of the foregoing embodiments, and is not described herein again.

In some embodiments, the inner side wall surface of the housing is provided with a connecting portion, the outer periphery side of the pole is provided with a mating portion for mating connection with the connecting portion, and the connecting portion is connected with the mating portion, so that the housing is detachably connected with the pole.

Through set up connecting portion at the inside wall face of housing to set up the cooperation portion in the periphery side of utmost point post, wherein, connecting portion can be recess or internal screw thread etc. and cooperation portion can be with recess matched with arch, or with the external screw thread of internal screw thread looks adaptation, connecting portion and cooperation portion cooperation are connected, make housing and utmost point post detachable be connected, thereby can make housing or battery monomer maintain the change alone, effectively reduce the manufacturing cost of product.

In some embodiments, one of the connecting portion and the mating portion is a limiting groove, the other is a limiting protrusion adapted to the limiting groove, and the limiting protrusion is inserted into the limiting groove, so that the housing is detachably connected with the pole.

The connecting part is a limit groove, the matching part is a limit bulge matched with the limit groove, or the connecting part is a limit bulge, the matching part is a limit groove matched with the limit bulge, and when the cover shell is arranged on the pole, the limit bulge can be inserted into the limit groove, so that the detachable connection of the cover shell and the pole can be realized.

In some embodiments, the limit groove comprises a mounting section, a horizontal transition section and a locking section which are sequentially connected, one end of the mounting section is communicated with the bottom end face of the housing, the other end of the mounting section is connected with the horizontal transition section, one end of the locking section is connected with one end of the horizontal transition section, and the other end of the locking section is arranged at intervals between the bottom end face of the housing.

The spacing groove is including the installation section that links to each other in proper order, horizontal transition section and locking section, wherein, the one end of installation section is linked together with the bottom terminal surface of housing for spacing arch on the utmost point post can insert the installation section from the bottom terminal surface of housing, and along the direction of stretching of installation section entering horizontal transition section, then make spacing arch get into the locking section through rotating the housing, finally make spacing arch lock in the locking section, in order to prevent that the relative utmost point post of housing from taking place to rotate.

In some embodiments, the number of the limit grooves is a plurality, and the limit grooves are arranged on the inner side wall surface of the housing at intervals; the limit protrusions and the limit grooves are the same in number, and are arranged on the outer periphery side of the pole at intervals corresponding to the limit grooves.

Through set up a plurality of spacing grooves at the inside wall face of housing to and set up a plurality of spacing archs in the periphery side of utmost point post, a plurality of spacing archs are connected with a plurality of spacing groove cooperation respectively, thereby can further improve the reliability that housing and utmost point post are connected, and further prevent that the relative utmost point post of housing from taking place to rotate.

In some embodiments, the two ends of the battery unit are provided with polar posts, and the cover case is detachably covered on the polar posts.

The battery cell comprises a battery cell body, wherein the two ends of the battery cell body are respectively provided with a pole column, each pole column comprises a positive pole column and a negative pole column, the number of the electric connection structures is two, covers of the two electric connection structures are respectively arranged on the two pole columns, and the electric connection parts are respectively electrically connected with one ends of the two overcurrent parts, which are positioned outside the covers.

In a third aspect, embodiments of the present application provide an electrical device comprising a battery according to any one of the embodiments of the second aspect, the battery being configured to power the electrical device.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded view of a battery according to some embodiments of the present application;

fig. 3 is a schematic diagram of an assembly structure of a battery cell and an electrical connection structure according to an embodiment of the present disclosure;

fig. 4 is a schematic top view of a battery cell according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of the structure of FIG. 4 in the direction A-A;

FIG. 6 is an enlarged schematic view of the portion B in FIG. 5;

fig. 7 is a schematic structural diagram of an electrical connection structure according to an embodiment of the present disclosure;

fig. 8 is a schematic cross-sectional view of an electrical connection structure according to an embodiment of the present application.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

Power cells typically include a plurality of cells connected in series, parallel, or series-parallel by electrical connections.

The inventor finds that when at least two battery electric bodies are connected, the electric connecting pieces such as the bus plates are directly welded with the poles of the two battery single bodies, the battery single bodies are easy to damage or have the risk of liquid leakage in the welding process, and meanwhile, the electric connecting pieces and the battery single bodies cannot be directly disassembled after welding and need to be replaced at the same time, so that the production cost of the battery with power is greatly increased.

Based on the above consideration, in order to solve the problem that the electric connection piece such as the current collecting piece is directly welded with the battery monomer post to cause damage and easy leakage, the inventor has conducted intensive research and designed an electric connection structure, through arranging the housing detachably connected with the battery monomer post and arranging the overcurrent piece on the housing, one end of the overcurrent piece is positioned in the housing and is used for being abutted with the post, and the other end of the overcurrent piece is positioned outside the housing and is used for being electrically connected with a device outside the housing, in this way, the device outside the housing is electrically connected with the overcurrent piece on the housing, thereby realizing current transmission, when the electric connection structure is damaged, only the battery monomer is required to be replaced independently, the rejection rate of the battery is reduced, and the production cost of the power battery is reduced.

The electric connection structure disclosed by the embodiment of the application can be used in a battery of an electric device such as a vehicle, a ship or an aircraft, but is not limited to the electric device. The power supply system with the electric connection structure, the battery monomer, the battery and the like disclosed by the application can be used for forming the electric device, so that the risk of battery leakage is reduced, the rejection rate of the battery is reduced, the use safety of the battery is improved, and the production cost of the battery is reduced.

The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is a schematic exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used for providing an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may further include an electrical connector for making electrical connection between the plurality of battery cells 20. The battery cell 20 refers to the smallest unit constituting the battery 100. As shown in fig. 3, the battery cell 20 includes an electrical connection structure 30 and a conductive connection member 40, wherein a cover of the electrical connection structure 30 is covered on the post 21 of the battery cell 20, and the conductive connection member 40 is used for electrically connecting two adjacent battery cells 20 through the conductive connection member 30.

Wherein each battery cell 20 may be a secondary battery cell or a primary battery cell; but not limited to, lithium sulfur battery cells, sodium ion battery cells, or magnesium ion battery cells. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3 to 8, fig. 3 is a schematic diagram illustrating an assembly structure of an electrical connection structure and a battery cell according to some embodiments of the present application; FIG. 4 is a schematic top view of an electrical connection structure according to some embodiments of the present disclosure; FIG. 5 is a schematic cross-sectional view of the structure of FIG. 4 in the direction A-A; FIG. 6 is an enlarged schematic view of the portion B in FIG. 5; fig. 7 is a schematic structural diagram of an electrical connection structure according to an embodiment of the present disclosure; fig. 8 is a schematic cross-sectional view of an electrical connection structure according to an embodiment of the present application. As shown in fig. 7 and 8, an embodiment of the present application provides an electrical connection structure 30, including: the housing 31 is provided with an opening 311, and the housing 31 is detachably arranged on the pole 21 of the battery cell 20 through the opening 311; and an overcurrent element 32, one end of the overcurrent element 32 is positioned inside the housing 31 and is provided corresponding to the opening 311 for abutting against the pole 21, and the other end is positioned outside the housing 31 for electrical connection with a device outside the housing 31.

The casing 31 is shaped to fit the pole 21 of the battery cell 20 and has an opening 311 for covering the pole 21 of the battery cell 20, and the casing 31 is detachably connected to the pole 21 of the battery cell 20 through the opening 311.

The overcurrent element 32 is a conductive element for electrically connecting devices such as a bus bar and the like outside the housing 31.

One end of the overcurrent element 32 is located inside the housing 31 and is used for being abutted against the pole 21 of the battery cell 20, and the other end of the overcurrent element 32 is located outside the housing 31 and is used for being electrically connected with devices outside the housing 31, so that devices such as a bus bar and the like outside the housing 31 are electrically connected with the pole 21 of the battery cell 20, a mode that in the prior art, electric connecting pieces such as the bus bar and the like are directly welded with the battery cell 20 is omitted, the leakage risk caused by welding the electric connecting pieces such as the bus bar and the like and the pole 21 of the battery cell 20 is reduced, the rejection rate of the battery is reduced, and the production cost of the battery is further reduced.

Referring to fig. 7, in some embodiments, a communication hole 36 is formed on a wall surface of the casing 31 corresponding to the opening 311, and the flow-through member 32 is disposed through the communication hole 36.

The communication hole is a through hole that communicates the inside and the outside of the casing 31. Here, the shape of the communication hole 36 is not limited, and the shape of the communication hole 36 may be square, circular, or the like, by way of example.

By providing the communication hole 36 on the wall surface of the casing 31 corresponding to the opening 311, the flow-through member 32 can pass through the communication hole so that both ends of the flow-through member 32 can be located inside and outside the casing 31, respectively, and the structure and principle are simple and easy to realize.

Referring to fig. 6 and 8, according to some embodiments of the present application, the flow member 32 includes: an inner sub-overcurrent element connected to one end of the overcurrent element 32 for abutting against the pole 21; an external sub-overcurrent element 321 connected to the other end of the overcurrent element 32 for electrical connection with a device outside the housing 31; wherein the cross-sectional areas of the inner sub-flow path 322 and the outer sub-flow path 321 are larger than the cross-sectional area of the flow path 32.

The inner sub-flow 32322 is located inside the casing 31 and the outer sub-flow 321 is located outside the casing 31.

Illustratively, both the inner sub-flow 322 and the outer sub-flow 321 are sheet-like structures. Helping to reduce its footprint.

The electrical connection between the device outside the casing 31 and the post 21 can be achieved by connecting the inner sub-overcurrent element 322 to the end of the overcurrent element 32 located inside the casing 31 and abutting against the post 21 of the battery cell 20, and connecting the outer sub-overcurrent element to the end of the overcurrent element 32 located outside the casing 31 and electrically connecting to the device outside the casing 31. It can be understood that the cross-sectional dimensions of the inner sub-current-passing member 322 and the outer sub-current-passing member 321 are both larger than the diameter of the communication hole, and since the inner sub-current-passing member 322 needs to be electrically connected with the post 21 of the battery cell 20, the cross-sectional area of the inner sub-current-passing member 322 is set to be larger than the cross-sectional area of the outer sub-current-passing member 321, the contact area between the inner sub-current-passing member 322 and the post 21 can be effectively ensured, and thus the current-passing area of the current-passing member 32 is ensured.

Referring to fig. 6 and 8, according to some embodiments of the present application, the electrical connection structure 30 further includes: the elastic member 34 is sleeved on the flow-through member 32, and two ends of the elastic member 34 are respectively abutted against the inner top wall surface of the housing 31 and the inner sub-flow-through member 322.

By way of example, the resilient member 34 may be a spring or rubber or the like.

Through the cover establish the elastic component 34 on the excessive current piece 32, and make the both ends of elastic component 34 respectively with the interior roof face of housing 31 and the upper surface butt of inside sub-excessive current piece 322, like this, when housing 31 cover was established on post 21, inside sub-excessive current piece 322 can remain the butt with post 21 all the time under the elastic force effect of elastic component 34 to guarantee that the outside device of housing 31 can remain the electricity through excessive current piece 32 all the time and be connected with post 21, improved the reliability that the product was used.

Referring to fig. 8, according to some embodiments of the present application, a gap 33 is provided between the inner sub-flow member 322 and the inner sidewall surface of the housing 31.

An inner wall surface of the housing 31, that is, a peripheral surface of the housing 31, is connected to an inner ceiling wall surface of the housing 31 provided in correspondence with the opening 311.

By providing the gap 33 between the inner sub-current passing member 322 and the inner side wall surface of the housing 31, the inner sub-current passing member 322 is prevented from contacting the inner side wall surface of the housing 31, and the inner sub-current passing member 322 is prevented from being locked to the inner side wall surface of the housing 31 when moving in the direction of the pole 21 by the elastic force of the elastic member 34.

Referring to fig. 8, in accordance with some embodiments of the present application, at least one lightening hole is provided on the inner sub-flow member 322.

Illustratively, the number of lightening holes is a plurality, which are circumferentially spaced along the inner sub-flow members 322.

By providing at least one lightening hole on the inner sub-flow passing member 322, the weight of the product is reduced and the production cost is reduced while ensuring that the flow passing area of the inner sub-flow passing member and the pole 21 is sufficient.

According to some embodiments of the present application, the housing 31 is an insulator.

The casing 31 is an insulating member, and when the casing 31 is covered on the pole 21 of the battery unit 20, the inner sub-overcurrent element 322 and the pole 21 of the battery unit 20 can be insulated and isolated from the casing 31, so that other structures outside the casing 31 are prevented from contacting the pole 21 and the inner sub-overcurrent element 322 inside the casing 31, and the safety of the product covered on the pole 21 can be ensured.

Referring to fig. 2 and 3, according to some embodiments of the present application, there is further provided a battery 100 including at least two battery cells 20; and at least two electrical connection structures 30 according to any of the above embodiments, wherein the housings 31 of the electrical connection structures 30 are detachably covered on the poles 21 of the battery cells 20, respectively; the conductive connection members 40 are electrically connected to the other ends of the current passing members 32 of the two electrical connection structures 30, respectively.

The battery provided in the embodiments of the present application, because of including the electrical connection structure described in any of the embodiments, has the technical effects of any of the embodiments described above, and is not described herein again.

According to some embodiments of the present application, the inner side wall surface of the housing 31 is provided with a connecting portion, and the outer peripheral side of the pole 21 is provided with a fitting portion for fitting connection with the connecting portion, the connecting portion being connected with the fitting portion, so that the housing 31 is detachably connected with the pole 21.

Illustratively, the connecting portion may be a groove, an internal thread, or the like, and the mating portion may be a protrusion that mates with the groove, or an external thread that mates with the internal thread.

Through set up connecting portion at the inside wall surface of housing 31 to set up the cooperation portion in the periphery side of utmost point post 21, connecting portion and cooperation portion cooperation are connected, make housing 31 and utmost point post 21 detachable connection, thereby can make housing 31 or battery cell 20 maintain the change alone, effectively reduce the manufacturing cost of product.

Referring to fig. 6 and 8, according to some embodiments of the present application, one of the connecting portion and the mating portion is a limiting groove 35, the other is a limiting protrusion 22 adapted to the limiting groove 35, and the limiting protrusion 22 is inserted into the limiting groove 35, so that the housing 31 is detachably connected to the pole 21.

That is, the connecting portion is a limit groove 35, the matching portion is a limit protrusion 22 matching with the limit groove 35, or the connecting portion is a limit protrusion 22, the matching portion is a limit groove 35 matching with the limit protrusion 22, when the housing 31 is covered on the pole 21, the limit protrusion 22 can be inserted into the limit groove 35, so that the detachable connection between the housing 31 and the pole 21 can be realized.

Referring to fig. 8, according to some embodiments of the present application, the limiting groove 35 includes a mounting section 351, a horizontal transition section 352 and a locking section 353 connected in sequence, one end of the mounting section 351 is communicated with the bottom end surface of the housing 31, the other end is connected with the horizontal transition section 352, one end of the locking section 353 is connected with one end of the horizontal transition section 352, and the other end is spaced from the bottom end surface of the housing 31.

The limit groove 35 comprises a mounting section 351, a horizontal transition section and a locking section 353 which are sequentially connected, wherein one end of the mounting section 351 is communicated with the bottom end surface of the housing 31, so that the limit protrusion 22 on the pole piece 21 can be inserted into the mounting section 351 from the bottom end surface of the housing 31 and enter the horizontal transition section 352 along the extending direction of the mounting section 351, then the limit protrusion 22 enters the locking section 353 by rotating the housing 31, and finally the limit protrusion 22 is locked in the locking section 353 to prevent the housing 31 from rotating relative to the pole piece 21.

According to some embodiments of the present application, the number of the limiting grooves 35 is plural, and the plurality of limiting grooves 35 are disposed on the inner side wall surface of the housing 31 at intervals; the limit protrusions 22 and the limit grooves 35 are the same in number, and are provided at intervals on the outer peripheral side of the pole 21 corresponding to the plurality of limit grooves 35.

By providing the plurality of limit grooves 35 on the inner side wall surface of the housing 31 and the plurality of limit protrusions 22 on the outer periphery side of the pole 21, the plurality of limit protrusions 22 are respectively connected with the plurality of limit grooves 35 in a matching manner, thereby further improving the connection reliability of the housing 31 and the pole 21 and further preventing the housing 31 from rotating relative to the pole 21.

According to some embodiments of the present application, the two ends of the battery cell 20 are provided with the pole posts 21, and the electrical connection structure 30 is detachably covered on the pole posts 21.

The battery cell 20 is provided with a pole column 21 at both ends, the pole column 21 comprises a positive pole column and a negative pole column, the number of the electric connection structures 30 is two, the covers 31 of the two electric connection structures 30 are respectively covered on the two pole columns 21, and the conductive connecting pieces 40 are respectively electrically connected with one ends of the two current passing pieces 32 outside the covers 31.

Referring to fig. 5 to 8, according to some embodiments of the present application, a battery is provided, which includes an electrical connection structure 30 and at least two battery cells 20, wherein the electrical connection structure 30 is used for electrically connecting the at least two battery cells 20. Wherein the electrical connection structure 30 comprises a housing 31 and an overcurrent element 32. The housing 31 has an opening 311, and the inner surface of the housing 31 is provided with a limit groove 35, and the outer periphery of the pole 21 of the battery unit 20 is provided with a limit protrusion 22, wherein the limit protrusion 22 is used for being inserted into the limit groove 35, so that the housing 31 is detachably connected with the pole 21. The current-through member 32 includes an inner sub-current-through sheet and an outer sub-current-through sheet connected to the inner sub-current-through sheet, the inner sub-current-through sheet is disposed inside the casing 31 and is used for abutting against the post 21 of the battery cell 20, and the outer sub-current-through sheet is disposed outside the casing 31 and is used for being electrically connected with the bus bar outside the casing 31. Wherein, a spring is arranged between the inner sub-overcurrent piece and the inner top wall surface of the housing 31, and the spring is in a compressed state and is used for keeping the inner sub-overcurrent piece in abutting connection with the pole 21. Further, the cross-sectional area of the inner sub-flow passage plate is larger than that of the outer sub-flow passage plate, and a plurality of lightening holes are formed in the inner sub-flow passage plate at intervals along the circumferential direction of the inner sub-flow passage plate.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

An electrical connection structure, comprising:

the housing is provided with an opening, and the housing is detachably arranged on the pole of the battery cell through the opening;

and one end of the overcurrent piece is positioned in the housing and corresponds to the opening, and is used for being abutted with the pole, and the other end of the overcurrent piece is positioned outside the housing and is used for being electrically connected with devices outside the housing.
The electrical connection of claim 1, wherein the electrical connection is a conductive wire,

the wall surface of the housing corresponding to the opening is provided with a communication hole, and the flow passing piece penetrates through the communication hole.
The electrical connection structure according to claim 1 or 2, wherein the current passing member comprises:

the inner sub-overcurrent piece is connected with one end of the overcurrent piece and is used for being abutted with the pole;

an external sub-overcurrent element connected with the other end of the overcurrent element and used for being electrically connected with a device outside the housing;

wherein the cross-sectional area of the inner and outer sub-flow members is greater than the cross-sectional area of the flow member.
The electrical connection structure of claim 3, further comprising: and the elastic piece is sleeved on the overcurrent piece, and two ends of the elastic piece are respectively abutted against the inner top wall surface of the housing and the inner sub-overcurrent piece.
The electrical connection of claim 3 or 4, wherein a gap is provided between the inner sub-flow member and an inner side wall surface of the housing.
The electrical connection of any of claims 3-5, wherein the inner sub-flow member is provided with at least one lightening hole.
The electrical connection of any one of claims 1-6, wherein the housing is an insulator.
A battery, comprising:

at least two battery cells;

at least two electrical connection structures according to any one of claims 1 to 7, the housings of which are detachably mounted on the poles of the battery cells, respectively;

and the conductive connecting pieces are respectively and electrically connected with the other ends of the overcurrent pieces of the two electric connecting structures.
The battery according to claim 8, wherein the inner side wall surface of the housing is provided with a connecting portion, the outer peripheral side of the pole is provided with a fitting portion for fitting connection with the connecting portion, and the connecting portion is connected with the fitting portion so that the housing is detachably connected with the pole.
The battery according to claim 9, wherein one of the connecting portion and the mating portion is a limiting groove, the other is a limiting protrusion adapted to the limiting groove, and the limiting protrusion is inserted into the limiting groove, so that the housing is detachably connected with the pole.
The battery of claim 10, wherein the limit groove comprises a mounting section, a horizontal transition section and a locking section which are sequentially connected, one end of the mounting section is communicated with the bottom end face of the housing, the other end of the mounting section is connected with the horizontal transition section, one end of the locking section is connected with one end of the horizontal transition section, and the other end of the locking section is arranged at intervals with the bottom end face of the housing.
The battery according to claim 10 or 11, wherein,

the number of the limiting grooves is multiple, and the limiting grooves are arranged on the inner side wall surface of the housing at intervals;

the limit protrusions and the limit grooves are the same in number, and are arranged on the outer periphery side of the pole at intervals corresponding to the limit grooves.
The battery according to any one of claims 8-12, wherein the battery cells are provided with poles at both ends, and the cover is detachably covered on the poles.
An electrical device comprising a battery as claimed in any one of claims 8 to 13 for powering the electrical device.