CN219917519U - Battery monomer, battery and power utilization device - Google Patents

Abstract

The application discloses a battery monomer, a battery and an electric device. The battery cell includes: a housing, an electrode column, and a detection assembly, the housing including a wall portion; the electrode column is arranged on the wall part and is provided with a matching part and a connecting part which are connected, the matching part is used for being electrically connected with the tab, and the connecting part is closer to the inside of the shell than the matching part; the detection component comprises a detection element and a wire, and the wire is connected with the detection element and the connecting part. Therefore, the matching part of the electrode column is used for being electrically connected with the tab, the connecting part is used for being electrically connected with the lead, and the connecting part is closer to the inside of the shell than the matching part, so that when the electrode column is electrically connected with the tab and the lead, the risk of failure and the like of the electric connection caused by interference among the tab, the lead and the electrode column is reduced, and the stability of the electric connection between the electrode column and the tab and the lead is improved.

Description

Battery monomer, battery and power utilization device

Technical Field

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

Background

Energy conservation and emission reduction are key to sustainable development, so that the adjustment of an energy structure is promoted, and the development and application of a battery technology are promoted. For example, some electrical devices are provided with a battery that discharges to power the electrical device, and when the battery is not storing energy enough, the battery may be charged to store more electrical energy.

Batteries generally include one or more battery cells. The battery cell includes an electrode column, which may be used to supply power to other functional components, and when the battery includes a plurality of battery cells, electrical connection may be achieved between the plurality of battery cells through the electrode column, however, when the electrode column acts on the plurality of components at the same time, interference may occur between the plurality of components and the electrode column, resulting in unstable electrical connection, and the like.

Disclosure of Invention

The utility model aims to solve the technical problems existing in the prior art.

In order to solve the above problems, the present utility model provides a battery cell, including: a housing, an electrode column, and a detection assembly, the housing including a wall portion; the electrode column is arranged on the wall part and is provided with a matching part and a connecting part which are connected, the matching part is used for being electrically connected with the tab, and the connecting part is closer to the inside of the shell than the matching part; the detection component comprises a detection element and a wire, and the wire is connected with the detection element and the connecting part. Therefore, the matching part of the electrode column is used for being electrically connected with the tab, the connecting part is used for being electrically connected with the lead, and the connecting part is closer to the inside of the shell than the matching part, so that when the electrode column is electrically connected with the tab and the lead, the risk of failure and the like of the electric connection caused by interference among the tab, the lead and the electrode column is reduced, and the stability of the electric connection between the electrode column and the tab and the lead is improved.

In some embodiments, the connection portion has a socket hole in which one end of the wire is inserted. Therefore, the connecting part is provided with the plug hole, the lead is inserted into the plug hole, the stability of the electric connection between the electrode column and the lead can be improved, the risk of failure and the like of the electric connection caused by interference among the tabs, the lead and the electrode column can be further reduced by inserting the lead into the plug hole, and the stability of the electric connection between the electrode column and the tabs and the lead can be improved.

In some embodiments, the plug aperture opens toward the detection element. Therefore, the wires can be conveniently inserted into the inserting holes, the lengths of the wires can be shortened as much as possible, and the line complexity of the wires is reduced.

In some embodiments, the mating portion defines a first relief groove, and the mating aperture extends to communicate with the first relief groove. From this, offer the first groove of dodging on the cooperation portion, the first groove intercommunication spliced eye of dodging is convenient for shaping spliced eye to and be convenient for insert the wire in the spliced eye, and when the wire is connected in the spliced eye, can reduce and produce the risk such as interference between tab, wire and the electrode post leading to electric connection inefficacy.

In some embodiments, the wires are countersunk into the plug holes in the thickness direction of the wires. Therefore, the wire protrudes out of the plug hole in the thickness direction, so that risks of electric connection failure and the like caused by interference among the tabs, the wire and the electrode column are reduced.

In some embodiments, the number of electrode columns is two, the polarities of the two electrode columns are opposite, and the two electrode columns are arranged at intervals, and the detection element is positioned between the two electrode columns. Therefore, the detection element is positioned between the two electrode columns, and when the detection element is electrically connected with the two electrode columns through the lead wire at the same time, the length of the lead wire can be shortened as much as possible, and the line complexity of the lead wire is reduced.

In some embodiments, the wall portion is provided with mounting holes corresponding to the two electrode columns one by one, each electrode column penetrates through the corresponding mounting hole, the detection element is embedded in the wall portion, and the lead penetrates out of the mounting hole through the hole wall of the mounting hole to be connected with the electrode column. Therefore, the electrode column is arranged in the mounting hole in a penetrating manner, the detection element is embedded in the wall part, the damage risk caused by excessive protrusion of the electrode column and the detection element on the wall part can be reduced, the electrode column and the detection element can be well protected through the wall part, meanwhile, the lead wire penetrates out of the mounting hole through the wall of the mounting hole, and the lead wire can be well protected through the wall part.

In some embodiments, the housing includes an insulator disposed on a side of the wall portion remote from the interior of the housing, and the detection element is disposed on the insulator. Therefore, the detecting element is arranged on the insulating piece, so that the detecting element can be well protected through the insulating piece, and meanwhile, the detecting element and the wall part can be isolated through the insulating piece, so that the risk of short circuit and the like of the detecting element is reduced.

In some embodiments, the sensing element is embedded within the insulator. Thus, the detecting element can be protected better by the insulating member, and the detecting element and the insulating member can be mounted on the wall portion as an integral member, so that the complexity of mounting between the detecting element and the wall portion can be simplified.

In some embodiments, the wire includes a main body portion embedded in the insulating member and electrically connected to the detection element, and an extension portion connecting the main body portion and the connection portion. Therefore, the main body part is buried in the insulating part, the main body part and the electrode column are electrically connected through the extension part, the main body part can be well protected through the insulating part, part of the wires are buried in the insulating part, only the extension part is exposed out of the insulating part, the length of the extension part can be reduced, and the complexity of a circuit exposed out of the insulating part is reduced.

In some embodiments, the insulator is provided with a relief hole extending through opposite side surfaces of the insulator, the electrode post is at least partially disposed in the relief hole, and the wire extends in the insulator and further extends from a wall of the relief hole into the relief hole to connect the connection portion. From this, the electrode post sets up in dodging downthehole at least partially, can reduce the insulating part and produce the problem of interference when electrode post and the tab electricity are connected to the electrode post sets up in dodging downthehole at least partially, can also reduce the electrode post and excessively protrude the harm risk that brings in the insulating part, thereby accessible insulating part and wall portion play better guard action to the electrode post, the wire is worn out to dodge downthehole through dodging the pore wall in hole simultaneously, can be convenient for play better guard effect to the wire through the insulating part, and reduce the circuit complexity that exposes in the insulating part outside.

In some embodiments, the end face of the electrode post is countersunk into the relief hole as compared to a side of the insulator remote from the wall portion. Therefore, the end face of the electrode column is sunk in the avoidance hole, so that the damage risk caused by excessive protruding of the electrode column from the insulating piece can be reduced, and the electrode column can be well protected through the insulating piece and the wall part.

In some embodiments, the connecting portion is disposed through the wall portion, and a connection lead for electrically connecting with the wire is disposed on the connecting portion. Therefore, the connecting lead is extended from the connecting part to be electrically connected with the lead through the connecting lead, and the risks of failure and the like of the electrical connection caused by interference among the tabs, the lead and the electrode column can be further reduced.

In some embodiments, the detection element comprises a temperature sensor, a deformation sensor, or a voltage sensor. Therefore, the working states such as the temperature, deformation and voltage of the battery cell can be detected through different types of the detection element, so that the battery cell can be managed in a targeted mode according to the current working state of the battery cell.

In some embodiments, the housing includes a shell with an open end and an end cap with an end cap cover disposed at the open end, and the electrode column and the sensing element are disposed at the end cap. Therefore, by arranging the electrode column and the detection element on the end cover, the detection element and the electrode column can be conveniently installed and fixed.

In some embodiments, the battery cell includes a circuit board disposed on the housing, the circuit board being electrically connected to the detection element. Therefore, the control signal can be provided for the detection element through the circuit board, so that the detection element can conveniently detect the state of the battery cell, and the battery cell can be conveniently and pertinently managed according to the information detected by the detection element.

In order to solve the above problems, the present application provides a battery, which includes the above battery cell.

In some embodiments, the battery includes a plurality of battery monomers, and the free electrode post of a plurality of batteries passes through the tabbing and connects, and the tabbing has the faying surface of being connected with the cooperation portion electricity, and the faying surface has been seted up and has been compared in the concave second of faying surface and dodge the groove, and the side of tabbing is dodged in the second in the groove, and the one end of wire is dodged in the groove through the side of tabbing. From this, set up the second at the laminating face of the tab and dodge the groove, the one end of wire is inserted in the second through the side of the tab and is dodged the inslot, can reduce the risk such as the interference between tab, wire and the electrode post and lead to electric connection inefficacy to improve the stability of electric connection between electrode post and tab and the wire.

In some embodiments, the second relief groove has a dimension in a direction perpendicular to the mating surface that is greater than or equal to the dimension of the wire. Therefore, the situation that the lead abuts against the tab in the direction perpendicular to the joint surface can be relieved, and risks of electric connection failure and the like caused by interference among the tab, the lead and the electrode column are reduced.

In some embodiments, the housing includes an insulating member disposed on a side of the wall portion away from the interior of the housing, the detecting element is disposed on the insulating member, and the tab includes a first connecting portion and a second connecting portion bent and connected with the first connecting portion, the first connecting portion is disposed on a side of the insulating member away from the wall portion, and the second connecting portion has a fitting surface. From this, set up in the one side that the insulating part deviates from wall portion through first connecting portion to set up the faying face and be connected with the cooperation portion electricity at second connecting portion, reduce the insulating part and interfere the position of tab, be convenient for realize that the tab is connected with the utmost point post electricity, and improve the stability that the tab is connected with the utmost point post electricity.

In some embodiments, the battery includes a battery management system electrically connected to the detection element. Therefore, the control signal can be provided for the detection element through the battery management system, so that the detection element can conveniently detect the state of the battery cell, and the battery cell can be conveniently and pertinently managed according to the information detected by the detection element.

In order to solve the above problems, the present application provides an electric device, which includes the battery described above.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a vehicle according to one or more embodiments;

FIG. 2 is a schematic exploded view of a battery according to one or more embodiments;

fig. 3 is a schematic diagram of an exploded structure of a battery cell and a tab according to one or more embodiments;

FIG. 4 is a partial schematic view of a battery cell to tab connection in accordance with one or more embodiments;

fig. 5 is a partial structural schematic diagram of a battery cell to tab connection in accordance with one or more embodiments;

fig. 6 is a schematic view illustrating an exploded structure of the battery cell and the tab shown in fig. 5;

fig. 7 is a partial schematic structural view of a battery cell according to one or more embodiments;

fig. 8 is an exploded view illustrating a partial structure of a battery cell according to fig. 7;

fig. 9 is a partial schematic structure of a battery cell according to one or more embodiments;

fig. 10 is an exploded view illustrating a partial structure of a battery cell according to fig. 9;

fig. 11 is a schematic structural view of a battery cell according to one or more embodiments;

fig. 12 is a schematic block diagram of a battery management system in connection with a battery cell in accordance with one or more embodiments.

Reference numerals: an electric vehicle 1; a battery 2; a controller 3; a motor 4; a case 20; a first portion 21; a second portion 22; a battery management system 30; a battery cell 10; a housing 100; a wall portion 110; a mounting hole 111; a housing 120; an open end 121; an end cap 130; an insulating member 140; a relief hole 141; an electrode column 200; an electrode assembly 201; a fitting portion 210; a connection part 220; a connection lead 230; plug holes 221; a first escape groove 222; a tab 300; a bonding surface 310; a second avoidance groove 311; a first connection portion 320; a second connection portion 330; a detection assembly 400; a detection element 410; a wire 420; a main body 421; an extension 422; a circuit board 500.

Detailed Description

Embodiments of the technical scheme 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 aspects of the present application, and thus are merely examples, and are not intended to limit the scope 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 of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like 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 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, and indicates that three relationships may exist, for example, a and/or B may indicate: 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" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means 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 description and simplification of the description, and do not indicate or imply 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 should 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 specific circumstances.

Currently, the more widely the battery is used in view of the development of market situation. The 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, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

The batteries mentioned in the art can be classified into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. Disposable batteries (Primary batteries) are also known as "disposable" batteries and galvanic cells, because they cannot be recharged for use after their charge has been exhausted and can only be discarded. Rechargeable batteries are also known as secondary (Secondary Battery) or secondary, accumulator batteries. The rechargeable battery is made of different materials and process from the primary battery, and has the advantages of being capable of being recycled for multiple times after being charged, and the output current load force of the rechargeable battery is higher than that of most of the primary batteries. The types of rechargeable batteries that are currently common are: lead acid batteries, nickel hydrogen batteries, and lithium ion batteries. The lithium ion battery has the advantages of light weight, large capacity (the capacity is 1.5-2 times of that of the nickel-hydrogen battery with the same weight), no memory effect and the like, and has very low self-discharge rate, so that the lithium ion battery is widely applied even though the price is relatively high. Lithium ion batteries are also widely used in pure electric vehicles and hybrid vehicles at present, and the capacity of the lithium ion batteries used for the purposes is relatively slightly low, but the lithium ion batteries have larger output and charging currents, longer service lives and higher cost.

The battery described in the embodiments of the present application refers to a rechargeable battery or a disposable battery. Hereinafter, embodiments of the present disclosure will be described mainly by taking a lithium ion battery as an example. It should be appreciated that the disclosed embodiments are applicable to any other suitable type of rechargeable battery. The batteries according to the embodiments disclosed in the present application may be directly or indirectly used in a suitable device to power the device.

The application provides an electric device which can comprise, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, 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. The power utilization device can comprise a battery, and the power utilization device can provide electric energy through the battery to realize corresponding functions.

The application also provides an electric vehicle, which may include a battery.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to one or more embodiments.

The vehicle 1 can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extending vehicle. The interior of the vehicle 1 is provided with a battery 2, and the battery 2 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery may be used for power supply of the vehicle 1, for example, the battery may be used as an operation power source of the vehicle 1. The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being arranged to control the battery to power the motor 4, for example for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the application, the battery 2 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

In order to improve the performance of the power device, the application also provides a battery, and referring to fig. 2, fig. 2 is a schematic diagram of an exploded structure of the battery according to one or more embodiments.

The shape of the battery may include, but is not limited to, a square cylinder or any other shape.

In some embodiments, the battery 2 may include a case 20 and a battery cell 10, the battery cell 10 being housed within the case 20. The case 20 is used to provide an accommodating space for the battery cell 10, and the case 20 may take various structures. In some embodiments, the case 20 may include a first portion 21 and a second portion 22, the first portion 21 and the second portion 22 being overlapped with each other, the first portion 21 and the second portion 22 together defining an accommodating space for accommodating the battery cell 10. The second portion 22 may be a hollow structure with one end opened, the first portion 21 may be a plate-shaped structure, and the first portion 21 covers the opening side of the second portion 22, so that the first portion 21 and the second portion 22 together define an accommodating space; the first portion 21 and the second portion 22 may be hollow structures each having an opening at one side, and the opening side of the first portion 21 is engaged with the opening side of the second portion 22.

The battery cell 10 includes, but is not limited to, a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, and the like. The manufacturing modes of the battery cell 10 include lamination type and winding type, namely, the battery cell 10 is divided into lamination type batteries and winding type batteries. The laminated battery has uniform current collecting effect, smaller internal resistance and large specific power, but in order to ensure accuracy, the requirement on the accuracy of the die is extremely high, the equipment investment is high, the process is complex, and the production efficiency is low. The coiled battery is simple to manufacture, the requirements of the flaking and assembling processes on equipment precision are common, the production efficiency is high, and the cost is low. In terms of performance, the coiled battery has excellent high-low temperature performance, is very rapid to charge, has an ultra-long service life, is stable in high output voltage, and is firm in structure and strong in shock resistance.

In the battery 2, the number of the battery cells 10 may be plural, and the plural battery cells 10 may be connected in series or parallel or in series-parallel, and the series-parallel refers to that the plural battery cells 10 are connected in series or parallel. The plurality of battery cells 10 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 10 is accommodated in the box body 20; of course, the battery 2 may be a battery module formed by connecting a plurality of battery cells 10 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 20.

The battery 2 may further include other structures, for example, the battery 2 may further include bus members such as tabs for making electrical connection between the plurality of battery cells 10.

Referring to fig. 3, fig. 3 is a schematic diagram of an exploded structure of a battery cell and a tab according to one or more embodiments.

The battery cell 10 may include a case 100 and an electrode column 200. The housing 100 may act as a carrier for the electrode column 200 and the tab 300 such that the electrode column 200 and the tab 300 are directly or indirectly connected to the housing 100. The electrode column 200 may be used as a charge-discharge interface of the battery cell 10.

The housing 100 may isolate the internal environment of the battery cell 10 from the external environment, and the housing 100 may have a certain hardness and strength, so that the housing 100 is not easy to deform when being extruded and collided, and the safety performance of the battery cell 10 is improved. The housing 100 may take any shape, for example, the shape of the housing 100 includes, but is not limited to, square, cylindrical, prismatic, etc., the housing 100 may be an internal hollow structure, and the interior of the housing 100 may be used to house objects such as electrodes and electrolyte.

The electrode column 200 may be used for connection of the battery cell 10 with an external circuit to serve as a charge-discharge interface of the battery cell 10, and in particular, the battery cell 10 may further include an electrode assembly 201, the electrode assembly 201 may be placed inside the case 100, and the electrode assembly 201 may be a component in which an electrochemical reaction occurs in the battery cell 10. One or more electrode assemblies 201 may be contained within the housing 100. The electrode assembly 201 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having active material constitute the main body portion of the electrode assembly 201, and the portions of the positive and negative electrode sheets having no active material constitute the tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery cell 10, the positive and negative electrode active materials react with the electrolyte, and the tab is connected to the electrode post 200 to form a current loop.

The tabs 300 may be used in the form of a battery module formed by connecting a plurality of battery cells 10 in series or parallel or series-parallel with the electrode posts 200, and then the entire battery module is accommodated in the case 20 to form the battery 2.

The housing 100 includes a wall portion 110, the electrode column 200 is disposed on the wall portion 110, and the electrode column 200 has a mating portion 210 and a connecting portion 220, wherein the mating portion 210 is electrically connected to the tab 300, and the connecting portion 220 is closer to the interior of the housing 100 than the mating portion 210. The wall 110 may be any side wall of the housing 100, and, for example, when the housing 100 is square, the portions corresponding to the six sides of the square housing 100 may be used as the wall 110 in this embodiment. The electrode column 200 may be disposed through the wall 110, and the electrode column 200 may be electrically connected to the electrode assembly 201 inside the housing 100 on a side facing the inside of the housing 100, and the electrode column 200 may be exposed outside the housing 100 on a side facing away from the inside of the housing 100, so as to be electrically connected to the tab 300 as the fitting portion 210. The mating portion 210 may be understood as an end surface of the electrode column 200 away from the interior of the case 100, and the connection portion 220 may be understood as a position other than the end surface of the electrode column 200 away from the interior of the case 100. Alternatively, the engaging portion 210 may be understood as a portion of the electrode column 200 away from the interior of the case 100, and the connection portion 220 may be understood as a portion of the electrode column 200 other than the engaging portion 210.

In the use process of the battery cell 10, the working state of the battery cell 10 may change, and if the working state of the battery cell 10 is not monitored in time, it is difficult to implement thermal runaway warning, battery life assessment, and/or structural strength failure of the battery case 100 of the battery cell 10. Therefore, it is necessary to monitor the operating state of the battery cell 10, thereby reducing safety risks and the like.

Referring to fig. 4, fig. 4 is a partial schematic view of a connection of a battery cell 10 with a tab 300 according to one or more embodiments.

The battery cell 10 further includes a detection assembly 400, the detection assembly 400 includes a detection element 410 and a wire 420, the wire 420 is connected with the detection element 410 and the connection part 220, so that the detection element 410 is electrified through the wire 420 and the electrode column 200, and the detection element 410 can realize corresponding functions. For example, the detecting element 410 may be used to monitor the state information of the battery cell 10, so as to regulate and control the battery cell 10 according to the state information of the battery cell 10, improve the cycle performance of the battery cell 10, reduce the safety risk, prolong the cycle life of the battery cell 10, and so on. However, the battery cell 10 includes the tab 300, the lead 420 and the sensing element 410 at the same time, and the tab 300, the lead 420 and the sensing assembly 400 are electrically connected to the electrode column 200, so that when the electrode column 200 acts on the tab 300 and the lead 420 at the same time, interference may occur between the tab 300 and the lead 420, between the tab 300 and the electrode column 200 and between the lead 420 and the electrode column 200, and there is a risk that the electrical connection between the tab 300, the lead 420 and the electrode column 200 is unstable. In this embodiment, when the lead 420 connects the detecting element 410 and the electrode column 200, the lead 420 only needs to be connected to the connecting portion 220, the tab 300 is connected to the mating portion 210, and the connecting portion 220 is closer to the inside of the housing 100 than the mating portion 210, so that when both the lead 420 and the tab 300 are electrically connected to the electrode column 200, the lead 420 and the tab 300 can form avoidance, and the risk of mutual interference between the lead 420 and the tab 300 can be reduced.

Through the above embodiment, the matching portion 210 of the electrode column 200 is used for electrically connecting with the tab 300, the connecting portion 220 is used for electrically connecting with the wire 420, and the connecting portion 220 is closer to the inside of the housing 100 than the matching portion 210, so that when the electrode column 200 is electrically connected with the tab 300 and the wire 420 at the same time, the risk of failure of the electrical connection and the like caused by interference among the tab 300, the wire 420 and the electrode column 200 is reduced, thereby improving the stability of the electrical connection between the electrode column 200 and the tab 300 and the wire 420.

In some embodiments, the detection element 410 includes a temperature sensor, a deformation sensor, or a voltage sensor. When the detecting element 410 is a voltage sensor, the current operating voltage of the battery cell 10 can be detected by the voltage sensor; when the detecting element 410 is a temperature sensor, the temperature of the wall portion 110 is detected by the temperature sensor, so as to infer the current working temperature of the battery cell 10, so that the working state of the battery cell 10 can be conveniently adjusted according to the current working temperature of the battery cell 10; when the detecting element 410 is a deformation sensor, deformation of the battery cell 10 is detected by the deformation sensor during charging and discharging of the battery cell 10, so that internal pressure variation of the battery cell 10 and the like can be calculated by the detected deformation amount. Therefore, the operating states of the battery cell 10, such as temperature, deformation, voltage, etc., can be detected by different types of the detecting elements 410, so as to facilitate targeted management of the battery cell 10 according to the current operating state of the battery cell 10.

In some embodiments, the housing 100 includes a shell 120 and an end cap 130, the shell 120 has an open end 121, the end cap 130 covers the open end 121, and the electrode column 200 and the sensing element 410 are disposed on the end cap 130. The case 120 may be hollow and have an open structure, and the case 120 may be used to accommodate objects such as electrodes, electrolyte, and sensor assemblies, and the end cap 130 seals the open end 121 of the case 120 to isolate the internal environment of the case 120 from the external environment. The end cap 130 may be made of a material having a certain hardness and strength (e.g., aluminum alloy), so that the end cap 130 is not easily deformed when being impacted by extrusion, thereby improving the safety performance of the battery cell 10. The end cap 130 may also be provided with an explosion-proof member for releasing the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold value. The materials of the end cap 130 and the housing 120 may also be various, for example, the materials of the end cap 130 and the housing 120 include, but are not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. Thus, by providing the electrode column 200 and the detection element 410 to the end cap 130, it is possible to facilitate mounting and fixing the detection element 410 and the electrode column 200.

In some embodiments, the number of electrode columns 200 is two, the polarities of the two electrode columns 200 are opposite, and the detecting elements 410 are located between the two electrode columns 200 at intervals. One of the two electrode posts 200 is a positive electrode post and the other is a negative electrode post, and the detection element 410 may be electrically connected to the two electrode posts 200 simultaneously through the wires 420 to supply power to the detection element 410 through the two electrode posts 200. The sensing element 410 and the two electrode columns 200 may be positioned on the same line, the sensing element 410 may be positioned at the middle of the two electrode columns 200, or the sensing element 410 may be positioned near one of the electrode columns 200. In other embodiments, the two electrode columns 200 may be located on the same side of the housing 100, for example, when the housing 100 is a polyhedron, multiple sides of the housing 100 may be considered as the wall 110 at the same time, the two electrode columns 200 are located on different sides of the wall 110, for example, when the housing 100 is a cuboid, the top surface and two opposite sides of the cuboid are both the wall 110, and the two electrode columns 200 are located on two opposite sides. Thus, the detecting element 410 is located between the two electrode columns 200, and when the detecting element 410 is electrically connected to the two electrode columns 200 through the conductive wire 420, the length of the conductive wire 420 can be shortened as much as possible, and the complexity of the circuit of the conductive wire 420 can be reduced.

In some embodiments, the wall portion 110 is provided with mounting holes 111 corresponding to two electrode columns 200 one by one, each electrode column 200 is penetrated through the corresponding mounting hole 111, the detection element 410 is embedded in the wall portion 110, and the wires 420 penetrate into the mounting holes 111 through the walls of the mounting holes 111 to connect the electrode columns 200. The depth of the mounting hole 111 may be greater than the height of the electrode column 200, so that the end surface of the electrode column 200 may be lower than the surface of the wall portion 110, thereby protecting the electrode column 200 through the mounting hole 111, the wall portion 110 may be further provided with a concave groove, the detecting element 410 may be located in the groove of the wall portion 110, and further, the depth of the groove of the wall portion 110 may be greater than or equal to the thickness of the detecting element 410, so as to reduce the height of the detecting element 410 protruding from the surface of the wall portion 110 as much as possible, thereby protecting the detecting element 410 better. The wires 420 may also be embedded in the wall 110, where the number of wires 420 may correspond to the number of electrode columns 200, and one end of the wires 420 is connected to the detecting element 410, and the other end extends to pass through the hole wall of the mounting hole 111 and is electrically connected to the electrode column 200 corresponding thereto. Accordingly, by inserting the electrode column 200 into the mounting hole 111 and embedding the detection element 410 inside the wall portion 110, the risk of damage caused by excessive protrusion of the electrode column 200 and the detection element 410 from the wall portion 110 can be reduced, so that the electrode column 200 and the detection element 410 can be well protected by the wall portion 110, and the lead 420 can be well protected by the wall portion 110 when the lead 420 passes through the wall of the mounting hole 111 and is inserted into the mounting hole 111.

In some embodiments, the connection portion 220 is disposed through the wall portion 110, and a connection lead 230 for electrically connecting with the wire 420 is connected to the connection portion 220. The connecting portion 220 is penetrating through the wall portion 110, so that at least part of the connecting portion 220 can be exposed at the wall portion 110, one end of the connecting lead 230 can be connected to the side portion of the connecting portion 220, so that the detecting element 410 can be electrically connected with the electrode column 200 through the lead 420 and the connecting lead 230, and the connecting lead 230 is led out from the connecting portion 220, and since the connecting portion 220 is closer to the inside of the housing 100 than the matching portion 210, the connecting lead 230 and the tab 300 can form avoidance, and further when the detecting element 410 is electrically connected with the connecting portion 220 through the lead 420 and the connecting lead 230, the lead 420 and the tab 300 can form avoidance. Thus, the connection lead 230 is extended from the connection portion 220 to be electrically connected to the lead 420 through the connection lead 230, and the risk of failure of the electrical connection or the like due to interference between the tab 300, the lead 420, and the electrode column 200 can be further reduced.

Referring to fig. 5 and 6, fig. 5 is a partial structural schematic view of the connection of the battery cell 10 with the tab 300 according to one or more embodiments, and fig. 6 is an exploded structural schematic view of the battery cell 10 with the tab 300 according to fig. 5.

The housing 100 includes an insulating member 140, the insulating member 140 is disposed on a side of the wall portion 110 away from the interior of the housing 100, and the detecting element 410 is disposed on the insulating member 140. The insulating member 140 may be made of plastic, rubber or other insulating materials, the insulating member 140 may be plate-shaped, the insulating member 140 may be attached to a side surface of the wall portion 110 away from the interior of the housing 100, two surfaces of the insulating member 140 and the wall portion 110 may be matched in size, for example, two surfaces of the insulating member 140 and the wall portion 110 may be polygonal, circular or the like, and among the two attached surfaces, the surface of the insulating member 140 may be smaller than or equal to the surface of the wall portion 110. The insulating member 140 may be adhered, coated or otherwise disposed on a side of the wall portion 110 away from the interior of the housing 100, and the detecting element 410 is disposed on the insulating member 140, for example, the detecting element 410 may be disposed on a side of the insulating member 140 away from the wall portion 110, or a groove may be formed on a side of the insulating member 140 away from the wall portion 110, and the detecting element 410 may be connected to the wall portion 110 through the insulating member 140 by placing the insulating member 140 in the groove. Therefore, by arranging the detecting element 410 on the insulator 140, the detecting element 410 can be well protected by the insulator 140, and meanwhile, the detecting element 410 and the wall 110 can be isolated by the insulator 140, so that the risk of short circuit and the like of the detecting element 410 is reduced.

Further, the detecting element 410 is buried in the insulating member 140. Thus, the detecting element 410 can be protected well by the insulating member 140, and the detecting element 410 and the insulating member 140 can be mounted on the wall portion 110 as an integral member, which can simplify the complexity of the mounting between the detecting element 410 and the wall portion 110.

Further, the lead 420 includes a main body 421 and an extension 422, the main body 421 is buried in the insulator 140 and electrically connected to the detection element 410, and the extension 422 connects the main body 421 and the electrode column 200. The detecting element 410 is embedded in the insulating element 140, one end of the wire 420 needs to be connected with the detecting element 410, so that at least part of the wire 420 needs to be embedded in the insulating element 140, in this embodiment, the wire 420 includes a main body 421 and an extension 422, the main body 421 is embedded in the insulating element 140, and the extension 422 is electrically connected with the main body 421 and the electrode column 200, so that the main body 421 can be better protected by the insulating element 140, and part of the wire 420 is embedded in the insulating element 140, only the extension 422 is exposed outside the insulating element 140, so that the length of the extension 422 can be reduced, and the complexity of the circuit exposed outside the insulating element 140 can be reduced.

In some embodiments, the insulating member 140 is provided with relief holes 141 penetrating opposite side surfaces of the insulating member 140, the electrode column 200 is at least partially disposed in the relief holes 141, and the wires 420 extend in the insulating member 140 and further extend from walls of the relief holes 141 into the relief holes 141 to connect the connection portions 220. The size of the avoidance hole 141 may correspond to the size of the electrode column 200, and illustratively, the radial size of the avoidance hole 141 may be slightly larger than the radial size of the electrode column 200, and the electrode column 200 is inserted into the avoidance hole 141 so as to be circumferentially disposed on the outer circumferential side of the electrode column 200 through the avoidance hole 141. The number of the avoidance holes 141 may correspond to the number of the electrode columns 200, and for example, when the number of the electrode columns 200 is two, the number of the avoidance holes 141 is also two, and one electrode column 200 corresponds to one avoidance hole 141. The detecting element 410 and part of the wires 420 may be embedded in the wall 110, the number of the wires 420 may correspond to the number of the electrode columns 200 one by one, one end of the wires 420 is connected to the detecting element 410, and the other end extends to the hole wall penetrating through the avoiding hole 141 and is electrically connected to the electrode column 200 corresponding thereto. From this, electrode post 200 sets up in dodging the hole 141 at least partially and can reduce the insulating member 140 and produce the problem of interference when being connected to electrode post 200 and the bat 300 electricity to electrode post 200 sets up in dodging the hole 141 at least partially, still can reduce electrode post 200 and excessively protrude the harm risk that brings in insulating member 140, thereby accessible insulating member 140 and wall portion 110 play better guard action to electrode post 200, wire 420 wears out to dodging in the hole 141 through dodging the pore wall of hole 141 simultaneously, can be convenient for play better guard effect to wire 420 through insulating member 140, and reduce the circuit complexity of exposing in the insulating member 140 outside.

Further, the end surface of the electrode column 200 is disposed in the relief hole 141 away from the wall portion 110 than the side surface of the insulating member 140. The depth of the avoiding hole 141 can be greater than the height of the electrode column 200 protruding from the wall portion 110, so that when the electrode column 200 is arranged in the avoiding hole 141, the end face of the electrode column 200 is sunk in the avoiding hole 141, and therefore, the damage risk caused by excessive protruding of the electrode column 200 from the insulating member 140 can be reduced by sunk the end face of the electrode column 200 in the avoiding hole 141, and the electrode column 200 can be well protected by the insulating member 140 and the wall portion 110.

In some embodiments, the patch 300 has a bonding surface 310 electrically connected to the mating portion 210, the bonding surface 310 is provided with a second avoidance groove 311 recessed compared to the bonding surface 310, the second avoidance groove 311 penetrates through a side surface of the patch 300, and one end of the wire 420 is inserted into the second avoidance groove 311 through the side surface of the patch 300. The bonding surface 310 of the patch 300 may be understood as any surface of the patch 300 that can be electrically connected, and one end of the wire 420 may be inserted into the second avoiding groove 311 to overlap the electrode column 200, so that the detecting element 410 is electrically connected to the electrode column 200 through the wire 420. The dimension of the second avoidance groove 311 in the direction parallel to the bonding surface 310 may be slightly greater than the dimension of the wire 420 in the direction parallel to the bonding surface 310, so that when one end of the wire 420 is inserted into the second avoidance groove 311, the wire 420 and the tab 300 may form avoidance through the second avoidance groove 311. The second avoidance groove 311 may penetrate through the side of the tab 300 facing the detection element 410, so that the conductive wire 420 is inserted into the second avoidance groove 311, and the length of the conductive wire 420 may be shortened as much as possible, so as to reduce the complexity of the circuit of the conductive wire 420. In other embodiments, the second avoidance groove 311 may penetrate other sides, which may be specifically set according to practical situations. Therefore, the second avoidance groove 311 is formed in the bonding surface 310 of the tab 300, and one end of the wire 420 is inserted into the second avoidance groove 311 through the side surface of the tab 300, so that the risk of failure of electrical connection caused by interference among the tab 300, the wire 420 and the electrode column 200 can be reduced, and the stability of electrical connection among the electrode column 200, the tab 300 and the wire 420 can be improved.

Further, in a direction perpendicular to the bonding surface 310, the size of the second avoidance groove 311 is greater than or equal to the size of the wire 420. One end of the lead 420 connected with the electrode column 200 may overlap on a portion of the end surface of the electrode column 200, and the height of the lead 420 protruding from the electrode column 200 is the dimension of the lead 420 in the direction perpendicular to the bonding surface 310. When the dimension of the second avoidance groove 311 in the direction perpendicular to the bonding surface 310 is greater than or equal to the dimension of one end of the lead 420 in the direction perpendicular to the bonding surface 310, the interference problem caused by the end surface of the lead 420 protruding from the electrode post 200 to the bonding surface 310 of the tab 300 can be alleviated.

In some embodiments, the tab 300 includes a first connecting portion 320 and a second connecting portion 330 connected to the first connecting portion 320 in a bending manner, wherein the first connecting portion 320 is disposed on a side of the insulating member 140 facing away from the wall portion 110, and the second connecting portion 330 has an attaching surface 310. The first connecting portion 320 and the second connecting portion 330 cooperate to make the tab 300 in a zigzag shape, and the circumferential dimension of the second connecting portion 330 may be smaller than the circumferential dimension of the avoidance hole 141, so that in the case that the end face of the electrode post 200 is disposed in the avoidance hole 141 in a sinking manner compared with a side face of the insulating member 140, which is far away from the wall portion 110, the tab 300 may still extend into the avoidance hole 141 through the second connecting portion 330 to be electrically connected with the mating portion 210 of the electrode post 200. The first connection portion 320 may overlap the surface of the insulating member 140 facing away from the wall portion 110 to carry the first connection portion 320 through the insulating member 140, thereby relieving the pressure applied to the electrode column 200 by the tab 300. Therefore, the first connecting portion 320 is disposed on a side of the insulating member 140 away from the wall portion 110, and the second connecting portion 330 is provided with the fitting surface 310 to be electrically connected with the fitting portion 210, so that the position interference of the insulating member 140 on the tab 300 is reduced, the electrical connection between the tab 300 and the pole is facilitated, and the stability of the electrical connection between the tab 300 and the pole is improved.

Referring to fig. 7 and 8, fig. 7 is a schematic view of a partial structure of a battery cell 10 according to one or more embodiments, and fig. 8 is an exploded schematic view of a partial structure of the battery cell 10 according to fig. 7.

The connection part 220 has a socket hole 221, and one end of the wire 420 is inserted into the socket hole 221. The plug hole 221 may be a through hole or a blind hole, and the size of the plug hole 221 may be matched with the size of the wire 420, so as to improve the stability of connection between the wire 420 and the plug hole 221 when the wire 420 is inserted into the plug hole 221. The plug hole 221 is located at the connecting portion 220, the tab 300 is connected with the mating portion 210, and the connecting portion 220 is closer to the interior of the housing 100 than the mating portion 210, when one end of the wire 420 is inserted into the plug hole 221, the joint surface 310 of the wire 420 and the tab 300 can form avoidance. Therefore, the connection portion 220 is provided with the insertion hole 221, the wire 420 is inserted into the insertion hole 221, so that the stability of the electrical connection between the electrode post 200 and the wire 420 can be improved, and the risk of failure of the electrical connection caused by interference among the tab 300, the wire 420 and the electrode post 200 can be further reduced due to the insertion of the wire 420 into the insertion hole 221, so that the stability of the electrical connection between the electrode post 200 and the tab 300 and the wire 420 is improved.

Further, the opening of the plugging hole 221 faces the detecting element 410. The wires 420 may be inserted into the insertion holes 221 through the openings of the insertion holes 221, and when the openings of the insertion holes 221 face the detection element 410, the wires 420 may be connected to the detection element 410 and the electrode column 200 in a straight line, so that the length of the wires 420 may be shortened as much as possible, and the line complexity of the wires 420 may be reduced.

Referring to fig. 9 and 10, fig. 9 is a partial schematic structure of a battery cell 10 according to one or more embodiments; fig. 10 is an exploded view illustrating a partial structure of the battery cell 10 according to fig. 9.

The matching portion 210 is provided with a first avoidance groove 222, and the plugging hole 221 extends to communicate with the first avoidance groove 222. The first avoidance groove 222 may be formed in the end surface of the mating portion 210, where the first avoidance groove 222 is recessed compared with the end surface of the mating portion 210, and the jack 221 extends to communicate with the first avoidance groove 222, so that the wire 420 can be conveniently inserted into the jack 221 from the first avoidance groove 222, and convenience in inserting the wire 420 into the jack 221 is improved. The first avoidance groove 222 may penetrate the side of the tab 300 facing the detecting element 410, so as to shorten the length of the wire 420 as much as possible, and reduce the complexity of the wire 420. In other embodiments, the first avoiding groove 222 may also extend through other sides perpendicular to the bonding surface 310, and may be specifically set according to practical situations. The width of the first avoidance groove 222 may be greater than or equal to the width of the wire 420, so that the wire 420 is inserted into the insertion hole 221 through the first avoidance groove 222. From this, set up first groove 222 of dodging on mating portion 210, first groove 222 intercommunication spliced eye 221 of dodging is convenient for shaping spliced eye 221 to and be convenient for insert wire 420 in spliced eye 221, and when wire 420 connects in spliced eye 221, can reduce the risk such as the interference that produces between tab 300, wire 420 and electrode post 200 and lead to electrical connection inefficacy.

Further, the conductive wire 420 is countersunk in the thickness direction of the conductive wire 420 in the plugging hole 221. The dimension of the plugging hole 221 in the thickness direction of the wire 420 is greater than or equal to the dimension of the wire 420 in the thickness direction, so that the wire 420 is sunk into the plugging hole 221. Thus, the lead 420 can be relieved from protruding from the insertion hole 221 in the thickness direction, so that the risk of failure of the electrical connection or the like due to interference between the tab 300, the lead 420, and the electrode column 200 can be reduced.

When the connection portion 220 is provided with the connection lead 230 for electrically connecting with the conductive wire 420, the connection lead 230 may extend from the inside of the socket hole 221 to the outside of the socket hole 221, so that the connection lead 230 and the tab 300 form a avoidance, and may be electrically connected with the conductive wire 420 through the connection lead 230. Alternatively, the connection leads 230 may be provided at other portions of the connection portion 220, and the connection leads 230 may be provided at positions spaced apart from the insertion holes 221.

Referring to fig. 11, fig. 11 is a schematic structural view of a battery cell 10 according to one or more embodiments.

The battery cell 10 includes a circuit board 500 provided on the housing 100, and the circuit board 500 is electrically connected to the sensing element 410. The circuit board 500 may be disposed at any position of the battery cell 10, and illustratively, the circuit board 500 may be disposed on any outer side of the housing 100 of the battery cell 10, such as when the detecting element 410 is disposed on the top of the housing 100 of the battery cell 10, and the circuit board 500 may also be disposed on the top of the housing 100, so that the detecting element 410 is electrically connected with the circuit board 500. Or the circuit board 500 may be further located at a position of the battery cell 10 near the electrode column 200 so as to supply power to the battery cell 10 through the electrode column 200. The circuit board 500 may transmit a control signal to the detection element 410 so that the detection element 410 detects information such as voltage, deformation, temperature, etc. of the battery cell 10 according to the received control signal, and the circuit board 500 may also receive information detected by the sensor and then perform targeted management on the battery cell 10 according to the received information. Thus, the circuit board 500 can provide control signals for the detecting element 410, so that the detecting element 410 can detect the state of the battery cell 10, and the battery cell 10 can be managed according to the information detected by the detecting element 410.

Referring to fig. 12, fig. 12 is a schematic block diagram of a battery management system 30 coupled to a battery cell 10 in accordance with one or more embodiments.

The battery includes a battery management system 30, and the battery management system 30 is electrically connected to the detection element 410. The battery management system 30 (Battery Management System, BMS) can have a great impact on the safe operation of the electric vehicle, the vehicle control strategy selection, the selection of the charging mode, and the operation cost. The battery management system 30 is required to complete real-time monitoring and fault diagnosis of the state of the battery system in the running process or the charging process of the vehicle, and inform the whole vehicle controller or the charger in a bus mode so as to achieve the purpose of effectively and efficiently using the battery system by adopting a reasonable control strategy. In this embodiment, the battery management system 30 may be electrically connected to the electrode columns 200 and the detection elements 410 of the plurality of battery cells 10 at the same time, so as to monitor the states of the cell voltages, temperatures, and module currents of the plurality of battery cells 10 through the battery management system 30 at the same time, and perform battery equalization control and fault diagnosis, etc. Thus, the battery management system 30 can provide a control signal to the detecting element 410, so that the detecting element 410 can detect the state of the battery cell 10, and the battery cell 10 can be managed according to the information detected by the detecting element 410.

In summary, the battery cell 10 includes the electrode column 200, the electrode column 200 has the matching portion 210 and the connecting portion 220, the matching portion 210 of the electrode column 200 is used for electrically connecting with the tab 300, the connecting portion 220 is used for electrically connecting with the lead 420, and the connecting portion 220 is closer to the inside of the housing 100 than the matching portion 210, so that the risk of failure in electrical connection and the like caused by interference among the tab 300, the lead 420 and the electrode column 200 can be reduced while the electrode column 200 is electrically connected with the tab 300 and the lead 420, thereby improving the stability of electrical connection among the electrode column 200, the tab 300 and the lead 420.

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 application has been described in detail with reference to the foregoing embodiments, it will 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 application, and are intended to be included within the scope of the appended 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 (22)

1. A battery cell, the battery cell comprising:

a housing including a wall portion;

the electrode column is arranged on the wall part and is provided with a matching part and a connecting part which are connected, the matching part is used for being electrically connected with the tab, and the connecting part is closer to the inside of the shell than the matching part;

the detection assembly comprises a detection element and a wire, wherein the wire is connected with the detection element and the connecting part.

2. The battery cell according to claim 1, wherein the connection portion has a socket hole in which one end of the lead is inserted.

3. The battery cell of claim 2, wherein the plug aperture opens toward the sensing element.

4. The battery cell according to claim 2, wherein the mating portion is provided with a first avoidance groove, and the insertion hole extends to communicate with the first avoidance groove.

5. The battery cell according to claim 4, wherein the lead is countersunk in the thickness direction of the lead in the plug hole.

6. The battery cell of claim 1, wherein the number of electrode posts is two, the polarities of the two electrode posts are opposite and are arranged at intervals, and the detection element is positioned between the two electrode posts.

7. The battery cell according to claim 6, wherein the wall portion is provided with mounting holes corresponding to the two electrode columns one by one, each electrode column is penetrated through the corresponding mounting hole, the detection element is embedded in the wall portion, and the lead wire penetrates into the mounting hole through the wall of the mounting hole so as to be connected with the electrode column.

8. The battery cell of any one of claims 1-6, wherein the housing includes an insulator disposed on a side of the wall portion remote from the housing interior, and the detection element is disposed on the insulator.

9. The battery cell of claim 8, wherein the sensing element is embedded within the insulator.

10. The battery cell of claim 9, wherein the lead includes a main body portion buried in the insulating member and electrically connected to the detection element, and an extension portion connecting the main body portion and the connection portion.

11. The battery cell as recited in claim 8, wherein the insulator is provided with relief holes extending through opposite side surfaces of the insulator, the electrode posts are at least partially disposed in the relief holes, and the wires extend in the insulator and further extend from walls of the relief holes into the relief holes to connect the connecting portions.

12. The battery cell of claim 11, wherein an end face of the electrode post is countersunk into the relief hole as compared to a side of the insulating member remote from the wall portion.

13. The battery cell according to any one of claims 1 to 6, wherein the connection portion is provided through the wall portion, and a connection lead for electrically connecting with the lead is provided on the connection portion.

14. The battery cell of claim 1, wherein the detection element comprises a temperature sensor, a deformation sensor, or a voltage sensor.

15. The battery cell of claim 1, wherein the housing comprises a shell and an end cap, the shell having an open end, the end cap being disposed over the open end, the electrode post and the sensing element being disposed over the end cap.

16. The battery cell of claim 1, wherein the battery cell comprises a circuit board disposed on the housing, the circuit board being electrically connected to the detection element.

17. A battery comprising a cell according to any one of claims 1-16.

18. The battery of claim 17, wherein the battery comprises a plurality of battery cells, the electrode columns of the battery cells are electrically connected through a tab, the tab has a bonding surface electrically connected with the mating portion, the bonding surface is provided with a second avoidance groove which is recessed compared with the bonding surface, the second avoidance groove penetrates through the side surface of the tab, and one end of the wire is inserted into the second avoidance groove through the side surface of the tab.

19. The battery of claim 18, wherein the second relief groove has a dimension in a direction perpendicular to the mating surface that is greater than or equal to a dimension of the wire.

20. The battery of claim 18, wherein the housing includes an insulating member disposed on a side of the wall portion away from the interior of the housing, the detecting element is disposed on the insulating member, the tab includes a first connecting portion and a second connecting portion bent and connected with the first connecting portion, the first connecting portion is disposed on a side of the insulating member away from the wall portion, and the second connecting portion has the fitting surface.

21. The battery of claim 17, wherein the battery comprises a battery management system, the battery management system being electrically connected to the detection element.

22. An electrical device comprising a battery as claimed in any one of claims 17 to 21.