CN116718918A

CN116718918A - Test fixture

Info

Publication number: CN116718918A
Application number: CN202311002289.6A
Authority: CN
Inventors: 林子毅
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-08-10
Filing date: 2023-08-10
Publication date: 2023-09-08
Anticipated expiration: 2043-08-10
Also published as: CN116718918B

Abstract

The invention discloses a test tool, and relates to the technical field of battery testing. The test fixture is used for testing the battery cell, the battery cell is provided with a pole, and soft bars are arranged on the pole. The test fixture comprises a supporting seat and an insulating assembly. The supporting seat is used for supporting the battery cell. The insulation component is fixedly connected to the supporting seat, and is provided with a penetrating hole for the soft rod to penetrate. Through setting up the supporting seat, then make the electric core can be supported by the supporting seat. Through with insulation component fixed connection in the supporting seat, then make between insulation component and the supporting seat and the relative position between the electric core on insulation component and the supporting seat relatively fixed to insulation stability between insulation component to the casing of electric core and the utmost point post of electric core has been improved. In addition, through being equipped with the hole of wearing that supplies soft bar to wear to establish on insulating subassembly, then make insulating subassembly improve soft bar's installation strength, reduce soft bar and warp easily, and then lead to the risk that the terminal of electric core passes through soft bar and the casing short circuit of electric core.

Description

Test fixture

Technical Field

The invention relates to the technical field of battery testing, in particular to a testing tool.

Background

Batteries are receiving increasing attention as a green energy source. In order to make the battery have good performance, a single electric core in the battery needs to be subjected to charge and discharge test before leaving the factory. When a single cell in a battery is subjected to charge and discharge test, soft bars are welded on positive and negative poles of the cell and then connected with copper bars on a charge and discharge machine, so that the cell is subjected to charge and discharge test. However, the soft bar is easy to deform and shake, so that the risk of short circuit between the electrode column and the shell of the battery cell can be caused by the fact that the anode and the cathode are lapped with the shell of the battery cell through the soft bar or the copper bar in the process of mounting the battery cell on the test tool or demounting the battery cell from the test tool.

Disclosure of Invention

The invention mainly aims to provide a testing tool which aims at reducing the risk of shorting a pole and a shell of a battery cell during testing.

In order to achieve the above purpose, the test fixture provided by the invention is used for testing the battery cell, wherein the battery cell is provided with a pole, and the pole is provided with a soft bar. The test fixture comprises a supporting seat and an insulating assembly. The supporting seat is used for supporting the battery cell. The insulation component is fixedly connected to the supporting seat, and is provided with a penetrating hole for the soft rod to penetrate. Through setting up the supporting seat, then make the electric core can be supported by the supporting seat. Through with insulation component fixed connection in the supporting seat, then make between insulation component and the supporting seat and the relative position between the electric core on insulation component and the supporting seat relatively fixed to insulation stability between insulation component to the casing of electric core and the utmost point post of electric core has been improved. In addition, through being equipped with the hole of wearing that supplies soft bar to wear to establish on insulating component, then improved soft bar's installation strength, reduced soft bar and warp easily, and then lead to the utmost point post of electric core to appear the risk of short circuit through soft bar and the casing of electric core. Meanwhile, the insulating component replaces the traditional top patch, the insulating component can be recycled for multiple times, and the cost of manually sticking the top patch is reduced. Moreover, the soft bars of the battery cells are penetrated through the insulating assembly, so that different insulating pieces can be corresponding to battery cell top covers with different sizes. The insulating component in the technical scheme of the invention can be suitable for the battery cores with different sizes, thereby improving the universality of the test tool.

In an embodiment, the insulation component has a first penetrating surface and a second penetrating surface for the soft rod to penetrate, and a distance from the first penetrating surface to the second penetrating surface is defined as a depth dimension of the penetrating hole. The through hole is also provided with a height direction perpendicular to the depth direction, and the height dimension of the through hole is not less than 1.5mm and not more than 2mm. Through setting the high size of wearing to establish the hole to be not less than 1.5mm and be not more than 2mm, then make should wear to establish the hole and can supply soft bar to pass through, but can not supply to fill the copper bar on the motor and pass through, isolated copper bar physically promptly through wearing to establish the hole and with the top cap or the case overlap joint condition of electric core, and then further reduced the utmost point post of electric core through filling the risk of the casing or the top cap short circuit of electric core on the motor, improved the test reliability of test fixture.

In one embodiment, the insulating assembly includes a fixed bracket and an insulating plate. The fixed bolster is connected in the supporting seat, has seted up the spacing groove on the fixed bolster. The insulation board is arranged in the limit groove, and the insulation board is provided with a through hole. Through seting up the spacing inslot on the fixed bolster, the insulation board is installed in the spacing inslot on the fixed bolster, then make the insulation board install behind the fixed bolster have better spacing effect, reduce the not hard up risk of insulation board. In addition, so set up, still make the insulation board be convenient for pull down from the fixed bolster to after the insulation board damages only need with this insulation board change can, need not to pull down whole insulation component and change, thereby reduced the cost of changing.

In one embodiment, the fixed bracket includes a post and a base plate. The stand is equipped with two relatively, stand and supporting seat fixed connection, and the spacing groove has been seted up to the lateral wall of stand. The insulating board is located between two adjacent stands, and the insulating board inserts in the spacing groove. Two ends of the bottom plate are respectively connected with two upright posts. Through with stand and supporting seat fixed connection, then realized fixed bolster and supporting seat fixed connection's effect. Through locating the insulation board between two adjacent stands, and the insulation board inserts in the spacing inslot, then make the spacing groove of stand carry out spacingly to four side directions of insulation board. Simultaneously, two stand is connected at bottom plate both ends, and the bottom plate can also carry out spacingly to the bottom of insulation board to realize better spacing effect.

In an embodiment, the bottom wall of the limiting groove is provided with a clamping groove, the insulating plate is convexly provided with a clamping convex part, and the clamping convex part is clamped into the clamping groove so as to limit the movement of the insulating plate towards the direction deviating from the bottom plate. Through having seted up the draw-in groove at the diapire of spacing groove, protruding the card convex part that is equipped with on the insulation board, and the card convex part card goes into the draw-in groove, then realized the effect of the mutual joint of fixed bolster and insulation board to improved the stability that the insulation board was installed in the fixed bolster, reduced the not hard up risk of insulation board. Simultaneously, so set up, can also realize that insulation board and fixed bolster can dismantle the effect of being connected for the insulation board can be dismantled from the fixed bolster, in order to change.

In an embodiment, an adjusting groove is formed in one side, away from the insulating plate, of the upright post, the extending direction of the adjusting groove is parallel to the extending direction of the upright post, and a connecting hole is formed in the supporting seat. The test fixture further comprises a connecting piece, wherein the connecting piece penetrates through the adjusting groove and the connecting hole and fixedly connects the supporting seat with the upright post. So set up, then realized adjusting the effect of fixed bolster's height, and then realized adjusting the height of insulation board, make it can adapt to the not unidimensional electric core to the soft bar of not unidimensional electric core can pass the hole of wearing of insulation board, and reduce the phenomenon that takes place crooked, thereby reduce the risk that the terminal post of electric core passes through soft bar and the casing short circuit of electric core.

In an embodiment, the side wall of the supporting seat, which is away from the upright post, is further provided with an avoidance groove, and the connecting hole is formed in the bottom wall of the avoidance groove. So set up, then can make the connecting piece stretch into at first and dodge the inslot, and then carry out the operation step that the connecting hole was worn to establish to the connecting piece again for the depth of wearing of connecting piece is shallower like this, is favorable to making the connecting piece accurately stretch into in the adjustment tank, in order to realize the effect that stand and supporting seat are connected. Meanwhile, the situation that the axis of the connecting hole is inclined in the process of machining the connecting hole is reduced. In addition, the weight of the supporting seat is reduced, and the test tool is convenient to carry.

In one embodiment, the support base is provided with a mounting groove, and the fixing support is mounted in the mounting groove. Through set up the mounting groove on the supporting seat, then be convenient for fixed bolster embedding mounting groove for the fixed bolster can be reserved and be located this mounting groove, and then make the fixed bolster have more definite mounted position on the one hand, on the other hand still is convenient for follow-up fixed bolster and supporting seat to be connected, makes the connection of two more convenient.

In one embodiment, the top of the supporting seat is provided with a placing groove for placing the power supply, and the placing groove is in a V shape. The placing grooves are arranged in a V shape, so that the openings of the placing grooves become larger gradually in the extending direction of the parallel upright posts, and therefore, the placing grooves can be used for placing the battery cores with different sizes, and the testing tool can be used for the battery cores with different sizes in a universal mode, and the universality of the testing tool is improved.

In an embodiment, the test fixture further comprises a binding belt, the supporting seat is provided with at least two connecting portions, two ends of the binding belt are respectively connected to the two connecting portions, and the binding belt is used for binding one side of the cell, which is away from the bottom of the placing groove. Through setting up the constraint area, on two connecting portions of the support seat are connected respectively at the both ends in constraint area, then make the constraint area carry out spacingly to one side that the electric core deviates from the support seat bottom to reduce the risk that the electric core dropped. In addition, through having set up the constraint area, in locating the standing groove in combining the electric core, and the tip of electric core is by the spacing scheme of insulation component, this test fixture can also change 90 to be suitable for the state that electric core was placed perpendicularly, further widened the service scenario of this test fixture, make to this test fixture be more close to the true service scenario of electric core.

In an embodiment, the two supporting seats are oppositely arranged, the test fixture further comprises a supporting shaft, and two ends of the supporting shaft are respectively connected with the two supporting seats. Through setting up two relative supporting seats, then can make this test fixture be suitable for carrying out the charge-discharge test to cylindrical electric core, the both ends of electric core are supported by two supporting seats respectively promptly to realize the firm supporting effect to the electric core. Two supporting seats are respectively connected through the two ends of the supporting shaft, so that the two supporting seats are connected into a whole, and the risk that one end of the battery cell falls down due to infinite sliding of one supporting seat in the testing process is reduced.

In an embodiment, the support shaft includes a first limiting section, a second limiting section, and a connecting post. The first limiting section and the second limiting section are oppositely arranged and are respectively limited in the two supporting seats; the two ends of the connecting column are respectively connected with the first limiting section and the second limiting section. The supporting shaft adopts the structure, so that the effect of mutual limitation of the supporting seat and the supporting shaft is realized, and the risk of mutual separation of the supporting seat and the supporting shaft is reduced.

In an embodiment, the two supporting seats are respectively provided with a sliding groove, and the first limiting section and the second limiting section are respectively arranged in the sliding grooves of the two supporting seats in a sliding manner. Through all setting up the spout in two supporting seats, and in the spout of two supporting seats is located to first spacing section and the second spacing section slip respectively, then make two supporting seats can slide relatively to realize adjusting the effect of distance between two supporting seats, and then make this test fixture can test the electric core of different length, in order to further improve the commonality of this test fixture.

Drawings

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

FIG. 1 is a schematic perspective view of an embodiment of a test fixture according to the present invention with a die to be tested;

FIG. 2 is a schematic perspective view of a fixing bracket of an insulation assembly in a test fixture according to the present invention;

FIG. 3 is a front view of a mounting bracket for an insulation assembly in a test fixture of the present invention;

FIG. 4 is a schematic perspective view of an insulating board of an insulating assembly in the test fixture of the present invention;

FIG. 5 is a schematic diagram of a three-dimensional structure of a supporting seat in the test fixture of the present invention;

FIG. 6 is a left side view of a support base in the test fixture of the present invention;

FIG. 7 is a cross-sectional view of the test fixture of the present invention after two support seats are assembled with the support shaft;

FIG. 8 is a schematic perspective view of an embodiment of a support shaft in a test fixture according to the present invention;

Fig. 9 is a schematic diagram of a connection structure between copper bars and a battery cell in a charging and discharging machine in a test fixture according to the present application.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

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 "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.

The batteries mentioned in the art can be classified into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. The types of rechargeable batteries that are currently common are: lead acid batteries, nickel hydrogen batteries, and lithium ion batteries. The lithium ion battery is widely applied to pure electric vehicles and hybrid electric vehicles at present, and the capacity of the lithium ion battery used for the application is slightly lower, but the lithium ion battery has larger output and charging current, longer service life and higher cost.

The battery described in the embodiments of the present application refers to a rechargeable battery. 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 technical scheme described by the embodiment of the application is suitable for the battery and the electric equipment using the battery.

Powered devices include, but are not limited to: cell phones, portable devices, notebook computers, battery cars, electric vehicles, boats, spacecraft, electric toys, and electric tools, etc., for example, spacecraft including airplanes, rockets, space planes, and spacecraft, etc., electric toys including fixed or mobile electric toys, for example, game machines, electric vehicle toys, electric ship toys, and electric plane toys, etc., electric tools including metal cutting electric tools, grinding electric tools, fitting electric tools, and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers.

Currently, the more widely the battery is used in view of the development of market situation. The battery is required to be subjected to charge and discharge test on a single electric core in the battery before leaving the factory, so that the battery has good performance, and the service life requirement of people on the battery is met. When a single cell in a battery is subjected to charge and discharge test, soft bars are welded on positive and negative poles of the cell, and then the soft bars are connected with copper bars on a charge and discharge motor, so that the cell is subjected to charge and discharge test. However, the soft bar is easy to deform and shake, so that in the process of mounting or dismounting the battery cell on or from the test tool, if an operator performs misoperation, the positive electrode and/or the negative electrode of the battery cell may be caused to overlap with the shell of the battery cell through the soft bar or the copper bar, so that the risk of short circuit between the pole post of the battery cell and the shell of the battery cell occurs, and the ignition condition is easily caused by the short circuit.

In order to prevent the above problems, a scheme of sticking a top patch on a positive top cover and a negative top cover of a battery cell to block a lap joint path between a terminal of the battery cell and a housing of the battery cell has been developed. However, the sizes of the top patches used in this solution are also different between different sizes or different models of cells, so that different top patches need to be purchased or designed for different cells. And because the top cover of the battery cell is also provided with the bar code and the explosion-proof valve, the bar code and the explosion-proof valve are not allowed to be shielded by the top patch, so that the top patch can not completely cover the top cover of the battery cell, the risk of short circuit still exists, and the scheme is unreliable. In addition, the scheme of arranging the top patch at the top cover of the battery cell needs to rely on manual operation, so that labor cost is increased.

In order to solve the problem that the pole 510 and the shell 520 of the battery cell 500 are easy to be short-circuited in the charge and discharge test, the invention provides a test tool.

In the embodiment of the present invention, please refer to fig. 1, 4 and 9 in combination, the testing tool is used for testing the battery cell 500, the battery cell 500 has a pole 510, and a soft bar 530 is disposed on the pole 510. The test fixture includes a support 100 and an insulation assembly 200. The support 100 is used for supporting the battery cell 500. The insulating assembly 200 is fixedly connected to the supporting seat 100, and the insulating assembly 200 is provided with a through hole 221, wherein the through hole 221 is used for the soft rod 530 to pass through.

The soft bar 530 refers to a conductive connection member for electrically connecting two adjacent battery cells 500 or electrically connecting the battery cells 500 with a charge/discharge machine in the test device. The soft bar 530 is easily deformed, and may be a copper conductive sheet or an aluminum conductive sheet, etc., so as to be capable of being flexibly connected with other battery cells 500 or a charge-discharge machine.

The test fixture is a fixture capable of testing at least one performance of the battery cell 500. The test fixture is mainly used for testing the charge and discharge performance of the battery cell 500.

The support 100 is a base member for supporting the battery 500. The support 100 may include a mounting table and a fixing component disposed on the mounting table for fixing the battery cell 500. Or, the supporting seat 100 may be provided with a groove structure for installing the battery cell 500, so that when the battery cell 500 is installed in the groove structure, the battery cell 500 can be limited by the groove wall of the groove, and the battery cell 500 has a better stable state. The groove body structure can be a U-shaped groove, a V-shaped groove or a trapezoid groove and the like, so that the installation of the power supply core 500 can be realized, and the power supply core 500 can be well supported and limited. It should be noted that, in order to facilitate the electrical connection between the battery cell 500 installed in the groove structure of the supporting seat 100 and the copper bar 600 of the charging and discharging machine outside, the positive electrode post and the negative electrode post of the battery cell 500 need to extend out of the groove structure and be used for being connected with the copper bar 600 on the charging and discharging machine. The copper bar 600 and the soft bar 530 on the charging and discharging machine can be connected through screws, so that the stable connection effect of the copper bar 600 and the soft bar 530 is improved.

The insulating module 200 is a module capable of providing an insulating effect. The insulation assembly 200 may include only one insulation plate 220 or may further include a bracket or the like coupled to the insulation plate 220. Or the insulation assembly 200 may be detachably connected by at least two insulating plates. The insulating member 200 may be made of bakelite plate, plastic, or the like. For better heat resistance, at least one component of the insulation assembly 200 may be made of bakelite. The insulating assembly 200 is fixedly connected to the support 100, for example, by means of screw connection, snap connection, or adhesion.

The penetration hole 221 is a hole structure through which the soft rod 530 of the power core 500 can pass. The through hole 221 may be a rectangular hole, a circular hole, or a hole of other shape. Further, since the shape of the soft bar 530 is generally rectangular, in order to accommodate the shape of the soft bar 530, it may be preferable that the penetration hole 221 be a rectangular hole. Through being equipped with on insulating subassembly 200 and wearing to establish hole 221, this wear to establish hole 221 can pass the soft bar 530 of power supply core 500 to make the cell wall of wearing to establish hole 221 have certain restriction effect to the deformation degree of soft bar 530, thereby can reduce soft bar 530 and warp and contact the risk with the casing 520 of power supply core 500, and then can reduce the casing 520 of power supply core 500 and the risk that the anodal or negative pole of power supply core 500 appears the short circuit. Through with insulation component 200 fixed connection in supporting seat 100, then realized insulation component 200 and supporting seat 100 stable connection's effect to can make insulation component 200 play better insulating effect between soft bar 530 and the casing 520 of electric core 500, reduce the risk that short circuit appears in the casing 520 of electric core 500 and the utmost point post 510 of electric core 500 in the test process.

According to the technical scheme, the supporting seat 100 is arranged, so that the battery cell 500 can be supported by the supporting seat 100. By fixedly connecting the insulating assembly 200 to the supporting seat 100, the relative positions between the insulating assembly 200 and the supporting seat 100 and between the insulating assembly 200 and the battery cell 500 on the supporting seat 100 are relatively fixed, so that the insulating stability of the insulating assembly 200 to the housing 520 of the battery cell 500 and the pole 510 of the battery cell 500 is improved. In addition, by providing the through hole 221 for the soft bar 530 to pass through on the insulating component 200, the installation strength of the soft bar 530 is improved, and the risk that the soft bar 530 is easy to deform and further causes the pole 510 of the cell 500 to be shorted with the housing 520 of the cell 500 through the soft bar 530 is reduced.

Meanwhile, the insulation assembly 200 replaces the traditional top patch, the insulation assembly 200 can be recycled, and the cost of manually pasting the top patch is reduced. In addition, the soft bars 530 of the battery cells 500 are inserted into the insulation assembly 200, so that different insulation pieces can be corresponding to different battery cell 500 top covers with different sizes. The insulating assembly 200 in the technical scheme of the invention can be suitable for the battery cells 500 with different sizes, thereby improving the universality of the test tool.

Further, referring to fig. 1, 4 and 9 in combination, the insulation assembly 200 has a first penetrating surface and a second penetrating surface for the soft rod 530 to penetrate, and a distance from the first penetrating surface to the second penetrating surface is defined as a depth dimension of the penetrating hole 221. The penetration hole 221 further has a height direction perpendicular to the depth direction, and a height dimension H of the penetration hole 221 is not less than 1.5mm and not more than 2mm.

The first penetrating surface and the second penetrating surface refer to a surface of the insulating plate 220 opposite to the battery cell 500 and a surface facing away from the battery cell 500, respectively. The first penetrating surface may be a plane or a curved surface. The second through surface may also be a plane or a curved surface. The distance from the first penetrating surface to the second penetrating surface refers to the distance from the opening of the penetrating hole 221 penetrating the first penetrating surface to the opening of the penetrating hole 221 penetrating the second penetrating surface, that is, the penetrating depth of the soft bar 530 in the insulation component 200. It is understood that when the battery cell 500 is cylindrical, the penetration direction of the soft rod 530 or the depth direction of the second penetration hole 221 is the axial direction of the cylinder. The height direction of the through hole 221 may be one radial direction of the battery cell 500. The height dimension of the through hole 221 in the present invention refers to the dimension of the through hole 221 perpendicular to the ground direction when the bottom surface of the support 100 is disposed below the battery cell 500.

Specifically, the height dimension H of the penetration hole 221 may be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2mm. Typically, the thickness of the soft bar 530 in the cell 500 is about 1mm, and the thickness of the copper bar 600 on the charge and discharge machine is typically 2.5mm. In this example, the height H of the through hole 221 is set to be not less than 1.5mm and not greater than 2mm, so that the through hole 221 can be used for the soft bar 530 to pass, but the copper bar 600 on the charging and discharging machine cannot be used for passing, that is, the situation that the copper bar 600 is overlapped with the top cover or the shell 520 of the battery core 500 through the through hole 221 is physically isolated, so that the risk that the pole 510 of the battery core 500 is shorted with the shell 520 or the top cover of the battery core 500 through the copper bar 600 on the charging and discharging machine is further reduced, and the test reliability of the test tool is improved.

In an example, referring to fig. 1 to 5 in combination, an insulation assembly 200 includes a fixing bracket 210 and an insulation plate 220. The fixing bracket 210 is connected to the supporting base 100, and a limiting groove 211a is formed on the fixing bracket 210. The insulating plate 220 is disposed in the limiting groove 211a, and the insulating plate 220 is provided with a through hole 221.

The fixing bracket 210 is a bracket for supporting the insulating plate 220 and is a member for fixing the insulating assembly 200 to the supporting base 100. The fixing bracket 210 may be connected to the support base 100 by a screw connection, a snap connection, a socket connection, or an adhesive connection. To further reduce the risk of shorting the cells 500, the fixing support 210 may be made of an insulating material, such as plastic or bakelite.

The insulating plate 220 is a member mainly for physical isolation and insulation. The insulating plate 220 may be made of a preferable bakelite plate, which has a good insulating effect on one hand and a good high temperature resistance on the other hand. Through the through hole 221 is formed in the insulating plate 220, the soft bar 530 of the battery cell 500 is not electrically connected with the insulating plate 220 after passing through the through hole 221, so that the risk of shorting the pole 510 of the battery cell 500 with the housing 520 of the battery cell 500 through other components can be reduced.

Through seting up spacing groove 211a on fixed bolster 210, insulation board 220 installs in the spacing groove 211a on the fixed bolster 210, then makes insulation board 220 have better spacing effect after installing in fixed bolster 210, reduces the not hard up risk of insulation board 220. In addition, the insulating plate 220 is convenient to detach from the fixing support 210, so that the insulating plate 220 is only required to be replaced after the insulating plate 220 is damaged, the whole insulating assembly 200 is not required to be detached for replacement, and the replacement cost is reduced.

In an example, referring to fig. 1 to 3 in combination, the fixing bracket 210 includes a column 211 and a bottom plate 212. The two upright posts 211 are oppositely arranged, the upright posts 211 are fixedly connected with the supporting seat 100, and the side walls of the upright posts 211 are provided with limit grooves 211a. The insulating plate 220 is disposed between two adjacent columns 211, and the insulating plate 220 is inserted into the limiting groove 211a. Two ends of the bottom plate 212 are respectively connected with two upright posts 211.

The upright post 211 is a main component for limiting the insulating plate 220, and has a better supporting effect on the insulating plate 220. The pillars 211 may be cylindrical or prismatic. Two stand columns 211 are oppositely arranged, and the two stand columns 211 can limit two opposite sides of the insulating plate 220 respectively, so that the insulating plate 220 has a relatively stable state.

The bottom plate 212 is a member for supporting the insulating plate 220, and has a good limiting effect on the bottom of the insulating plate 220 and an effect of connecting the two upright posts 211.

By fixedly connecting the upright post 211 with the support base 100, the effect of fixedly connecting the fixing bracket 210 with the support base 100 is achieved. The upright post 211 and the support base 100 may be connected by screw connection, snap connection, adhesion, or the like. By arranging the insulating plate 220 between two adjacent upright posts 211 and inserting the insulating plate 220 into the limiting groove 211a, the limiting groove 211a of the upright post 211 limits the four side directions of the insulating plate 220. Meanwhile, two upright posts 211 are connected to two ends of the bottom plate 212, and the bottom plate 212 can limit the bottom of the insulating plate 220, so that a good limiting effect is achieved.

Further, referring to fig. 1 to 4, a clamping groove 211b is formed in the bottom wall of the limiting groove 211a, and a clamping protrusion 222 is protruding on the insulating plate 220, and the clamping protrusion 222 is clamped into the clamping groove 211b to limit the movement of the insulating plate 220 in a direction away from the bottom plate 212.

The locking groove 211b is a groove structure for locking and connecting with a component engaged with the locking groove.

The protruding portion 222 on the insulating plate 220 is a protruding portion protruding from an edge of the insulating plate 220, and is configured to be snap-fitted with the locking groove 211b, and the protruding portion 222 is a member having a certain elasticity.

Specifically, the clamping groove 211b is formed on the bottom wall of the limiting groove 211a, so that the clamping groove 211b can be communicated with the limiting groove 211 a. When the insulating plate 220 is inserted between the two upright posts 211 along the extending direction of the limit groove 211a from the direction away from the bottom plate 212, firstly, the clamping convex part 222 is abutted against the bottom wall of the limit groove 211a, and the limit groove 211a is abutted against the clamping convex part 222 to elastically deform; then, when the protruding portion 222 is opposite to the clamping groove 211b, the clamping groove 211b provides a space for avoiding the protruding portion 222, so that the protruding portion 222 is deformed and extends into the clamping groove 211b, and the top wall of the clamping groove 211b has a limiting effect on the protruding portion 222. The clamping groove 211b may be rectangular or triangular, and the shape of the clamping convex portion 222 is matched with the shape of the clamping groove 211 b.

Through having seted up draw-in groove 211b at the diapire of spacing groove 211a, the insulation board 220 epirelief is equipped with card convex part 222, and card convex part 222 card goes into in the draw-in groove 211b, then has realized the effect of fixed bolster 210 and the mutual joint of insulation board 220 to improved the stability of insulation board 220 installation in fixed bolster 210, reduced the not hard up risk of insulation board 220. Meanwhile, the insulation board 220 and the fixing support 210 can be detachably connected, so that the insulation board 220 can be detached from the fixing support 210 to be replaced conveniently.

Further, referring to fig. 1 to 3, and fig. 5 and 6, an adjusting groove 211c is formed on a side of the upright post 211 facing away from the insulating plate 220, an extending direction of the adjusting groove 211c is parallel to an extending direction of the upright post 211, and a connecting hole 132 is formed on the supporting seat 100. The test fixture further comprises a connecting piece 700, wherein the connecting piece 700 penetrates through the adjusting groove 211c and the connecting hole 132, and fixedly connects the supporting seat 100 and the upright post 211.

The adjustment groove 211c is a groove structure capable of adjusting the installation height of the column 211 so as to adjust the polarity of the heights of the fixing bracket 210 and the insulating plate 220 installed on the fixing bracket 210.

The extending direction of the adjustment groove 211c means that the adjustment groove 211c is elongated, and the longitudinal direction thereof is the extending direction thereof. Through setting the extending direction of the adjusting groove 211c to be parallel to the extending direction of the upright post 211, the upright post 211 can be connected with the supporting seat 100 at different positions of the extending direction of the upright post 211, so that the effect of adjusting the height of the fixing support 210 is achieved, the height of the insulating plate 220 is adjusted, the insulating plate can adapt to the battery cells 500 with different sizes, the soft bars 530 of the battery cells 500 with different sizes can penetrate through the penetrating holes 221 of the insulating plate 220, and the bending phenomenon is reduced, so that the risk that the pole 510 of the battery cell 500 is short-circuited with the shell 520 of the battery cell 500 through the soft bars 530 is reduced.

The connection member 700 is a member that can pass through the adjustment groove 211c of the upright post 211 and the connection hole 132 of the support base 100, and further can fixedly connect the upright post 211 and the support base 100. The connection 700 may be a pin, screw, bolt, or the like. In one example, the connector 700 includes a bolt and a nut, and the adjusting groove 211c has the nut mounted therein, and the bolt passes through the connecting hole 132 of the support base 100 and extends into the adjusting groove 211c to be screwed with the nut in the adjusting groove 211 c. Wherein the adjusting groove 211c may be a trapezoid groove, that is, the adjusting groove 211c has two grooves which are mutually communicated, the two grooves have different opening sizes, the groove with a larger opening is located at one side of the groove with a smaller opening, which is far away from the supporting seat 100, so that after the nut is placed in the groove with a larger opening, the nut can be blocked by the groove with a smaller opening, so that the nut cannot be separated from the adjusting groove 211c of the upright post 211 along the extending direction of the bolt, and then the upright post 211 and the supporting seat 100 have a stable connecting effect. Of course, in other embodiments, the adjustment slot 211c may have other shapes, such as rectangular, triangular, etc.

In order to achieve a better supporting effect, the thickness of the side wall of the supporting seat 100 is usually larger, if the connecting hole 132 is directly penetrated from the surface of the supporting seat 100 facing away from the upright post 211 to the surface of the supporting seat 100 facing towards the upright post 211, the depth of the connecting hole 132 is too large, so that on one hand, the processing process of the connecting hole 132 is difficult, and on the other hand, the connecting piece 700 is difficult to connect the supporting seat 100 and the upright post 211.

In order to improve the problem, further, referring to fig. 1 to 3, and fig. 5 and 6, the side wall of the support base 100 facing away from the upright post 211 is further provided with an avoidance groove 130, and the connection hole 132 is formed in the bottom wall of the avoidance groove 130.

The escape groove 130 is a space for providing installation when the link 700 connects the upright 211 and the support 100. Through seting up dodging groove 130 in the supporting seat 100 side that deviates from stand 211, then can at first make connecting piece 700 stretch into dodging inslot 130, and then carry out the operation step that connecting piece 700 worn to establish connecting hole 132, make the depth of wearing of connecting piece 700 shallow like this, be favorable to making connecting piece 700 accurately stretch into in the adjustment tank 211c to realize the effect that stand 211 and supporting seat 100 are connected. At the same time, the situation that the axis of the connecting hole 132 is inclined in the process of processing the connecting hole 132 is reduced. In addition, the weight of the supporting seat 100 is reduced, and the test fixture is convenient to carry.

In an example, referring to fig. 1 and 5 in combination, the support base 100 is provided with a mounting groove 120, and the fixing bracket 210 is mounted in the mounting groove 120.

The mounting groove 120 is a groove structure for mounting the fixing bracket 210, and may be U-shaped, V-shaped or other shapes. Through set up mounting groove 120 on supporting seat 100, then be convenient for fixed bolster 210 imbeds in mounting groove 120 for fixed bolster 210 can be predetermined to be located in this mounting groove 120, and then makes fixed bolster 210 have more definite mounted position on the one hand, and on the other hand still is convenient for follow-up fixed bolster 210 and supporting seat 100 to be connected, makes the connection of two more convenient.

Further, referring to fig. 1 and 5 in combination, a placement groove 110 for placing the power supply core 500 is provided at the top of the supporting seat 100, and the placement groove 110 is V-shaped.

The placement groove 110 is a groove structure for placing the battery cell 500 to be subjected to the charge and discharge test. By providing the placement groove 110 on the support base 100, the battery cell 500 can be directly placed in the placement groove 110, so that the groove wall of the placement groove 110 limits the battery cell 500 in at least a part of directions.

Further, the placement groove 110 is V-shaped, so that the opening of the placement groove 110 gradually becomes larger in the extending direction of the parallel upright post 211, and the placement groove 110 can place the battery cells 500 with different sizes, so that the test fixture of the invention can be generally used for the battery cells 500 with different sizes, and the universality of the test fixture is improved.

When the placement groove 110 is V-shaped, the placement groove 110 has an opening facing upward, from which the battery cell 500 can be placed in the placement groove 110. At this time, the test fixture can be applied to a test scene when the battery cell 500 is laterally placed. In order to make the test fixture further suitable for the situation when the battery cell 500 is vertically placed, further in an example, please refer to fig. 1, 5 and 6, the test fixture further includes a restraint strap 300, the support base 100 is provided with at least two connecting portions 140, and two ends of the restraint strap 300 are respectively connected to the two connecting portions 140, so as to restrain one side of the battery cell 500 facing away from the bottom of the placement groove 110.

The binding band 300 is a band capable of binding the battery cell 500 placed in the placement groove 110, that is, a band limiting a side of the battery cell 500 facing away from the bottom of the placement groove 110. The binding band 300 may be a twine, a band having elasticity, a band having velcro, or the like.

The connection portion 140 is a member connected to the tether strap 300. It may be a column that may extend horizontally or vertically. Or the connection part 140 may be a pressing device so as to press both ends of the binding band 300, thereby reducing the risk of the binding band slipping off the support 100. The two ends of the binding belt 300 are respectively connected to the two connecting portions 140 on the supporting base 100, which means that the two ends of the binding belt 300 can be respectively bound to the two connecting portions 140, or adhered to the two connecting portions 140, or wound around the two connecting portions 140.

Through setting up the constraint area 300, on two connecting portions 140 of the support seat 100 are connected respectively at the both ends of constraint area 300, then make the constraint area 300 can be spacing to the one side that the electric core 500 deviates from the support seat 100 bottom to reduce the risk that electric core 500 dropped. In addition, through having set up the constraint area 300, combine electric core 500 to locate in standing groove 110, and the tip of electric core 500 is by the spacing scheme of insulation component 200, this test fixture can also change 90 to be suitable for the state that electric core 500 placed perpendicularly, further widened the service scenario of this test fixture, make to this test fixture be more close to the true service scenario of electric core 500.

In an embodiment, as shown in fig. 1, two supporting seats 100 are oppositely arranged, the test fixture further includes a supporting shaft 400, and two ends of the supporting shaft 400 are respectively connected with the two supporting seats 100.

The support shaft 400 refers to a member for supporting and connecting the two support seats 100.

Through setting up two relative supporting seats 100, then can make this test fixture be suitable for carrying out the charge-discharge test to cylindrical electric core 500, the both ends of electric core 500 are supported by two supporting seats 100 respectively promptly to realize the firm supporting effect to electric core 500. Two supporting seats 100 are respectively connected to two ends of the supporting shaft 400, so that the two supporting seats 100 are connected into a whole, and the risk that one end of the battery cell 500 falls down due to infinite sliding of one supporting seat 100 in the testing process is reduced.

Specifically, in an example, referring to fig. 1, 7 and 8 in combination, the support shaft 400 includes a first limiting section 410, a second limiting section 420 and a connecting post 430. The first limiting section 410 and the second limiting section 420 are oppositely arranged and are respectively limited in the two supporting seats 100; the two ends of the connecting post 430 are respectively connected to the first limiting section 410 and the second limiting section 420.

The first limiting section 410 is a component for being inserted into one of the two supporting seats 100 and limiting with respect to the supporting seat 100. That is, the first limiting section 410 limits the sliding of the supporting seat 100 in plug-in fit with the first limiting section, so that the risk of separating from the first limiting section 410 when the supporting seat 100 slides is reduced. The first stop segment 410 may be cylindrical or prismatic.

Similarly, the second limiting section 420 is a component for being inserted into the other of the two supporting seats 100 and limiting the supporting seat 100 with each other. That is, the second limiting section 420 limits the sliding of the supporting seat 100 in plug-in fit with the second limiting section, so that the risk that the supporting seat 100 is separated from the second limiting section 420 when sliding is reduced. The second stop 420 may be cylindrical or prismatic.

The connecting column 430 is a column body disposed between the first limiting section 410 and the second limiting section 420 and connected to the first limiting section 410 and the second limiting section 420 respectively, and has the effect of connecting the first limiting section 410 and the second limiting section 420. It will be appreciated that in order to achieve the spacing effect of the first spacing segment 410, the effective diameter dimension of the first spacing segment 410 is greater than the effective diameter dimension of the connecting post 430. In order to achieve the limiting effect of the second limiting section 420, the effective diameter size of the second limiting section 420 is larger than the effective diameter size of the connecting post 430. The first limiting section 410 and the connecting post 430 may be connected in a detachable manner or in a non-detachable manner. Similarly, the second limiting section 420 and the connecting post 430 may be connected in a detachable manner, or may be connected in a non-detachable manner.

It can be appreciated that the supporting seat 100 in spacing fit with the first spacing section 410 is provided with a receiving cavity for receiving the first spacing section 410, and a cavity wall of the receiving cavity is provided with a through hole for the connecting column 430 to pass through, and an effective diameter size of the through hole is smaller than a size of the first spacing section 410. In order to facilitate the first limiting segment 410 with a larger effective diameter to be inserted into the supporting seat 100, the supporting seat 100 may be configured as a detachable two-split structure, and when the two-split structure is opened, the first limiting segment 410 may be exposed, so that the first limiting segment 410 is taken out from the supporting seat 100. After the two split structures are folded, the first limiting section 410 is hidden, and at this time, the first limiting section 410 cannot be detached from the supporting seat 100. The volume of the receiving cavity may be equal to the volume of the first limiting segment 410 or greater than the volume of the first limiting segment 410.

Similarly, a receiving cavity for receiving the second limiting section 420 is arranged in the supporting seat 100 in a limiting fit with the second limiting section 420, the receiving cavity is provided with a through hole for the connecting column 430 to penetrate, and the effective diameter size of the through hole is smaller than that of the second limiting section 420. In order to facilitate the insertion of the second limiting segment 420 with a larger effective diameter into the supporting seat 100, the supporting seat 100 may be configured as a detachable two-split structure, and when the two-split structure is opened, the second limiting segment 420 may be exposed, so that the second limiting segment 420 is taken out from the supporting seat 100. After the two split structures are mutually folded, the second limiting section 420 is hidden, and at this time, the second limiting section 420 cannot be detached from the supporting seat 100. The volume of the accommodating cavity accommodating the second limiting section 420 may be equal to the volume of the second limiting section 420, or may be larger than the volume of the second limiting section 420.

The supporting shaft 400 adopts the structure, so that the effect of mutual limitation of the supporting seat 100 and the supporting shaft 400 is realized, and the risk that the supporting seat 100 and the supporting shaft 400 are separated from each other is reduced.

Further, as shown in fig. 8, the two supporting seats 100 are provided with sliding grooves 150, and the first limiting section 410 and the second limiting section 420 are respectively slidably disposed in the sliding grooves 150 of the two supporting seats 100.

The chute 150 is a groove structure in which a member provided therein can slide. Specifically, in order to prevent the first and second limiting sections 410 and 420 from being separated from the two supporting seats 100, and to enable the connecting post 430 to extend into the supporting seat 100 to be connected with the first and second limiting sections 410 and 420, a through hole through which the connecting post passes is provided on a side wall of the sliding chute 150 of each supporting seat 100 facing the other supporting seat 100, which does not allow the first or second limiting section 410 or 420 to pass through, of the two supporting seats 100. In addition, the side wall of the sliding groove 150 of each support 100 far from the other support 100 is also used for stopping the first limiting section 410 or the second limiting section 420, so as to reduce the risk that the first limiting section 410 and the second limiting section 420 are separated from the two supports 100 respectively.

Through all setting up spout 150 in two supporting seats 100, and in the spout 150 of two supporting seats 100 is located to first spacing section 410 and second spacing section 420 slip respectively, then make two supporting seats 100 can the relative slip to realize adjusting the effect of distance between two supporting seats 100, and then make this test fixture can test the electric core 500 of different length, in order to further improve the commonality of this test fixture.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. The utility model provides a test fixture for test the electric core, the electric core has the utmost point post, be equipped with soft bar on the utmost point post, its characterized in that includes:

the support seat is used for supporting the battery cell; and

the insulation assembly is fixedly connected to the supporting seat; the insulation assembly is provided with a penetrating hole, and the penetrating hole is used for the soft rod to penetrate.

2. The test fixture of claim 1, wherein the insulating assembly has a first through surface and a second through surface for the soft rod to pass through, and a distance from the first through surface to the second through surface is defined as a depth dimension of the through hole; the through holes are further provided with height dimensions perpendicular to the depth direction, and the height dimensions of the through holes are not smaller than 1.5mm and not larger than 2mm.

3. The test fixture of claim 1 or 2, wherein the insulating assembly comprises:

the fixed support is connected to the supporting seat and provided with a limit groove; and

the insulating plate is arranged in the limiting groove, and the through holes are formed in the insulating plate.

4. The test fixture of claim 3, wherein the fixed bracket comprises:

the two upright posts are oppositely arranged, the upright posts are fixedly connected with the supporting seat, and the side wall of each upright post is provided with the limiting groove; the insulating plates are arranged between two adjacent upright posts, and the insulating plates are inserted into the limiting grooves; and

and two ends of the bottom plate are respectively connected with the two stand columns.

5. The test fixture of claim 4, wherein the bottom wall of the limit groove is provided with a clamping groove, the insulating plate is convexly provided with a clamping convex part, and the clamping convex part is clamped into the clamping groove to limit the movement of the insulating plate in a direction deviating from the bottom plate.

6. The test fixture of claim 4, wherein an adjusting groove is formed in one side, away from the insulating plate, of the upright post, the extending direction of the adjusting groove is parallel to the extending direction of the upright post, and a connecting hole is formed in the supporting seat; the test fixture further comprises a connecting piece, wherein the connecting piece penetrates through the adjusting groove and the connecting hole, and the supporting seat is fixedly connected with the upright post.

7. The test fixture of claim 6, wherein the side wall of the support base facing away from the upright post is provided with an avoidance groove, and the connecting hole is formed in the bottom wall of the avoidance groove.

8. The test fixture of claim 3, wherein the support base is provided with a mounting groove, and the fixing bracket is mounted in the mounting groove.

9. The test fixture of claim 1, wherein the support base is provided with a placement groove for placing the battery cell, and the placement groove is V-shaped.

10. The test fixture of claim 9, further comprising a tie-down strap, wherein the support base is provided with at least two connecting portions, and two ends of the tie-down strap are respectively connected to the two connecting portions, so as to tie down one side of the cell away from the bottom of the placement groove.

11. The test fixture of claim 9, wherein two support seats are oppositely arranged, and the test fixture further comprises a support shaft, wherein two ends of the support shaft are respectively connected with the two support seats.

12. The test fixture of claim 11, wherein the support shaft comprises:

a first limit section;

The first limiting section and the second limiting section are oppositely arranged and are respectively limited in the two supporting seats; and

the two ends of the connecting column are respectively connected with the first limiting section and the second limiting section.

13. The test fixture of claim 12, wherein both of the support seats are provided with a sliding slot, and the first and second limiting sections are slidably disposed in the sliding slots of both of the support seats, respectively.