CN212568872U - Test tool for battery cell - Google Patents

Abstract

The application relates to a test fixture of battery cell. This test fixture of electric core includes: the battery comprises a supporting seat, a battery cell bracket supported by the supporting seat, a first connecting piece used for electrically connecting a positive electrode lug of the battery cell and a second connecting piece used for electrically connecting a negative electrode lug of the battery cell; wherein, the battery cell bracket is provided with heat dissipation holes or heat dissipation grooves; the first connecting piece and the second connecting piece are arranged on two sides of the battery cell bracket, and at least one of the first connecting piece and the second connecting piece is movably arranged on the battery cell bracket along the horizontal direction. The scheme that this application provided does benefit to the heat dissipation on electric core surface, has improved the degree of accuracy of electric core capability test result.

Description

Test tool for battery cell

Technical Field

The application relates to a battery cell testing technology, in particular to a testing tool of a battery cell.

Background

The battery cells are generally classified into an aluminum-shell battery cell, a soft-package battery cell (also called a polymer battery cell) and a cylindrical battery cell. Under the condition that the potential safety hazard takes place, the laminate polymer battery who uses laminate polymer battery core can only blow open at most, and good security performance makes laminate polymer battery core's application more and more extensive.

The contact internal resistance that positive and negative pole utmost point ear and test equipment are connected of soft-packaged electrical core, soft-packaged electrical core surface temperature have great influence to soft-packaged electrical core performance test result during soft-packaged electrical core performance test.

In the performance test process of the soft package cell in the related art, the soft package cell is placed in a test environment (such as a test table), the positive and negative electrode tabs of the soft package cell are connected with test equipment in a bolt and nut screwing or clamp clamping mode, and after the connection is performed for many times, the connection mode of screwing the bolt and the nut is very easy to tear the positive and negative electrode tabs of the soft package cell due to human errors; and the clamp force is not enough in the clamping connection mode of the clamp, so that the contact between the positive electrode tab and the negative electrode tab of the soft-package battery cell and the clamp is abnormal. Foretell connected mode causes the contact internal resistance easily to be big partially, and in the soft-packaged electrical core performance test process, soft-packaged electrical core has a big surface and certain physical surface direct laminating in the test environment moreover, is unfavorable for the surperficial heat dissipation of soft-packaged electrical core, brings great negative effects for soft-packaged electrical core performance test result.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that exists among the correlation technique, this application provides a test fixture of electric core, does benefit to the heat dissipation on electric core surface, has improved the degree of accuracy of electric core capability test result.

The application provides a test tool for a battery cell, which comprises a supporting seat, a battery cell bracket supported by the supporting seat, a first connecting piece and a second connecting piece, wherein the first connecting piece is used for electrically connecting a positive electrode lug of the battery cell, and the second connecting piece is used for electrically connecting a negative electrode lug of the battery cell; wherein:

the battery cell bracket is provided with heat dissipation holes or heat dissipation grooves;

the first connecting piece and the second connecting piece are arranged on two sides of the battery cell bracket, and at least one of the first connecting piece and the second connecting piece is movably arranged on the battery cell bracket along the horizontal direction.

Preferably, the battery cell bracket is provided with a plurality of first guide rods extending in the horizontal direction and arranged at intervals, the heat dissipation groove is formed between every two adjacent first guide rods, and at least one of the first connecting piece and the second connecting piece is movably mounted on the plurality of first guide rods.

Preferably, the first connecting piece and the second connecting piece are respectively provided with a plurality of through holes, and two ends of a plurality of first guide rods of the battery cell bracket respectively penetrate through the through holes of the first connecting piece and the second connecting piece.

Preferably, the first connecting piece and the second connecting piece are respectively provided with a pair of opposite parts, a groove for accommodating a corresponding tab of the battery core is formed between the pair of opposite parts, at least one of the pair of opposite parts is provided with a through hole communicated with the groove, and the groove of the first connecting piece and the groove of the second connecting piece are arranged opposite to each other.

Preferably, the battery further comprises a tab pressing piece arranged in the groove and used for pressing the corresponding tab of the battery cell.

Preferably, the first connector and the second connector are respectively provided with wire connecting parts at both sides of the groove.

Preferably, the supporting seat comprises a first cross rod and a second cross rod which are arranged at the top end of the vertical direction in parallel, and a third cross rod and a fourth cross rod which are arranged at the bottom end of the vertical direction in parallel, each side of the supporting seat comprises a first connecting rod connected with the first cross rod and the third cross rod, a second connecting rod connected with the second cross rod and the fourth cross rod, a third connecting rod connected with the third cross rod and the fourth cross rod, and a fourth connecting rod connected with the first cross rod and the second cross rod, the fourth connecting rod is narrower than the third connecting rod, and the first connecting rod to the fourth connecting rod form a trapezoidal frame; alternatively, the first and second electrodes may be,

the supporting seat is including locating the first horizontal pole on vertical top, parallel third horizontal pole and the fourth horizontal pole of locating vertical bottom, each side of supporting seat is including connecting the head rod, the connection of first horizontal pole and third horizontal pole the second connecting rod and the connection of first horizontal pole and fourth horizontal pole the third connecting rod of third horizontal pole and fourth horizontal pole, head rod to third connecting rod form three triangle-shaped conical frame.

Preferably, the support seat is provided with second guide rods on two sides of the battery cell bracket, and the first connecting piece and the second connecting piece are movably mounted on the corresponding second guide rods in the vertical direction.

Preferably, at least one of the second guide rods on two sides of the cell bracket is arranged obliquely relative to the vertical direction, so that the distance between the second guide rods on two sides of the cell bracket varies along the vertical direction; alternatively, the first and second electrodes may be,

the second guide rods on the two sides of the battery cell bracket are parallel to the vertical arrangement, so that the distance between the second guide rods on the two sides of the battery cell bracket is fixed along the vertical direction.

Preferably, the second guide rods on the two sides of the battery cell bracket are symmetrically and obliquely arranged along the direction from the vertical top end to the vertical bottom end, wherein the distance between the second guide rods is gradually reduced.

The technical scheme provided by the application can comprise the following beneficial effects:

the application provides a test fixture of electric core includes: the battery comprises a supporting seat, a battery cell bracket supported by the supporting seat, a first connecting piece used for electrically connecting a positive electrode lug of the battery cell and a second connecting piece used for electrically connecting a negative electrode lug of the battery cell; wherein, the battery cell bracket is provided with heat dissipation holes or heat dissipation grooves; the first connecting piece and the second connecting piece are arranged on two sides of the battery cell bracket, and at least one of the first connecting piece and the second connecting piece is movably arranged on the battery cell bracket along the horizontal direction. According to the test tool for the battery core, the battery core bracket with the heat dissipation holes or the heat dissipation grooves is supported by the supporting seat in a suspending mode, and the battery core to be tested is placed on the suspended battery core bracket with the heat dissipation holes or the heat dissipation grooves, so that the battery core surface can be prevented from being directly attached to a battery core supporting surface in a test environment in a large area, heat dissipation of the battery core surface is facilitated, and measurement errors are reduced; at least one of the first connecting piece and the second connecting piece is movably arranged on the battery cell bracket along the horizontal direction, and the distance between the first connecting piece and the second connecting piece can be adjusted to adapt to battery cells to be tested with different sizes. The application provides a test fixture of electric core simple structure, the testing personnel of being convenient for operate, can be used for testing the electric core of various sizes, do benefit to the heat dissipation on electric core surface, have improved the degree of accuracy of electric core capability test result.

Furthermore, at least one of the first connecting piece and the second connecting piece is movably arranged on the plurality of first guide rods, so that the distance between the first connecting piece and the second connecting piece can be adjusted to adapt to the battery cells to be tested with different sizes. In addition, the battery cell bracket is provided with a plurality of first guide rods, so that the first connecting piece and/or the second connecting piece can stably move on the first guide rods, and the first connecting piece and the second connecting piece are prevented from overturning in the moving process; simultaneously, a plurality of first guide arms also are convenient for place the electric core of awaiting measuring stably on the electric core bracket.

Further, when the second guide rods with the intervals unchanged along the vertical direction are arranged on the two sides of the battery cell bracket, the first connecting piece and the second connecting piece can be enabled to have different intervals by moving the first connecting piece and/or the second connecting piece in the horizontal direction, so that the battery cell bracket can be adapted to battery cells to be tested with different sizes.

Furthermore, the second guide rods with the intervals changing along the vertical direction are obliquely arranged on two sides of the battery cell bracket, and the first connecting piece and the second connecting piece are movably arranged on the corresponding second guide rods respectively along the vertical direction, so that the first connecting piece and the second connecting piece have different intervals when moving to different positions of the second guide rods, and the battery cell bracket can adapt to battery cells to be tested with different sizes.

Further, the test fixture of electric core that this application provided is still including locating be used for compressing tightly in the recess the utmost point ear compressing tablet of the corresponding utmost point ear of electric core. Utilize the lamellar structure of utmost point ear pressing blade pushes down the entering the recess the utmost point ear of electricity core can increase the positive negative pole ear of electricity core with the area of contact of first connecting piece and second connecting piece, first bolt screw in the recess increases pressure on the utmost point ear pressing blade makes the positive negative pole ear of electricity core with first connecting piece and second connecting piece in close contact with, the contact surface is level and smooth moreover, effectively reduces the corresponding utmost point ear of electricity core with the contact internal resistance of first connecting piece and second connecting piece has improved the degree of accuracy of electric core performance test result.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a front view of a cell testing tool according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of connection between a bracket of a cell testing tool according to an embodiment of the present application and a first connecting piece and a second connecting piece;

FIG. 3 is a schematic structural diagram of a first connector according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a cell testing tool according to another embodiment of the present application;

FIG. 5 is a front view of FIG. 4;

fig. 6 is a right side view of fig. 4.

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a front view of a cell testing tool according to an embodiment of the present application; fig. 2 is a schematic structural diagram of connection between a bracket of a cell testing tool and a first connecting piece and a second connecting piece according to an embodiment of the present application.

Referring to fig. 1 and 2, a cell testing tool includes a support base 10, a cell bracket 20 supported by the support base 10, a first connecting member 30 for electrically connecting a positive electrode tab of a cell, and a second connecting member 40 for electrically connecting a negative electrode tab of the cell; wherein, the battery cell bracket 20 is provided with heat dissipation holes or heat dissipation grooves; the first connecting member 30 and the second connecting member 40 are disposed on two sides of the cell bracket 20, and at least one of the first connecting member 30 and the second connecting member 40 is movably mounted on the cell bracket 20 along a horizontal direction.

In one implementation, the support base 10 connects the top frame 102 and the bottom frame 103 of the support base 10 by the strut 101. The cell bracket 20 is mounted on the support 101 of the support base 10. The first connecting member 30 and the second connecting member 40 are respectively mounted on the cell bracket 20 to be movable in the horizontal direction.

In one implementation, the cell bracket 20 is provided with a plurality of first guide rods 201 extending in a horizontal direction and spaced apart from each other, a heat dissipation groove 203 is formed between adjacent first guide rods 201, and at least one of the first connecting member 30 and the second connecting member 40 is movably mounted on the plurality of first guide rods 201. In one specific implementation, the first connecting member 30 and the second connecting member 40 are respectively provided with a plurality of first through holes 50, two ends of a plurality of first guide rods 201 of the battery cell bracket 20 respectively penetrate through the plurality of first through holes 50 of the first connecting member 30 and the second connecting member 40, and the first connecting member 30 and the second connecting member 40 can move along the first guide rods 201.

As shown in fig. 2, in the present embodiment, the battery cell bracket 20 includes three first guide rods 201 and a square outer frame 202, which are parallel to each other and are uniformly distributed, and heat dissipation grooves 203 are formed between the three first guide rods 201 and between the first guide rods 201 and the outer frame 202. The bottoms of the first connecting piece 30 and the second connecting piece 40 are respectively provided with three first through holes 50 in the horizontal direction, the shapes of the first guide rod 201 and the first through holes 50 are matched, and two ends of the first guide rod 201 respectively penetrate through the first through holes 50 of the first connecting piece 30 and the second connecting piece 40, so that the first connecting piece 30 and the second connecting piece 40 can be movably arranged on the three first guide rods 201 of the battery cell bracket 20. By moving the first connector 30 and/or the second connector 40 on the first guide bar 201 of the cell carrier 20, the distance between the first connector 30 and the second connector 40 can be adjusted to accommodate different sizes of cells to be tested.

In one implementation, in order to avoid short circuit to the circuit of the cell performance test, the supporting seat 10 and the cell bracket 20 may be made of an insulating material, or subjected to an insulating treatment, such as spraying an insulating paint on the supporting seat 10 and the cell bracket 20, or winding an insulating sticker such as teflon.

In one implementation, in order to reduce the internal contact resistance between the corresponding tabs of the battery cells and the first connecting member 30 and the second connecting member 40, the first connecting member 30 and the second connecting member 40 may be made of a material with low resistance and good conductivity, including but not limited to copper or silver. In another implementation, the surfaces of the first connecting element 30 and the second connecting element 40 may be plated with a material with low resistance and good conductivity, including but not limited to silver plating or copper plating.

According to the battery cell testing tool, the battery cell bracket 20 is provided with the plurality of first guide rods 201, the heat dissipation grooves 203 are formed between the adjacent first guide rods 201, the battery cell bracket 20 with the heat dissipation grooves 203 is supported in a suspended mode by the supporting seat 10, a battery cell to be tested is placed on the suspended battery cell bracket 20 with the heat dissipation grooves 203, the surface of the battery cell can be prevented from being directly attached to the surface of a certain entity in a testing environment in a large area, heat dissipation of the surface of the battery cell is facilitated, and measuring errors are reduced; at least one of the first and second connectors 30 and 40 for connecting corresponding tabs of the battery cells is movably mounted on the first guide rod 201 of the battery cell bracket 20, and the distance between the first and second connectors 30 and 40 can be adjusted to adapt to battery cells to be tested with different sizes. The application provides a test fixture of electric core simple structure, the testing personnel of being convenient for operate, can be used for testing the electric core of various sizes, do benefit to the heat dissipation on electric core surface, have improved the degree of accuracy of electric core capability test result.

Fig. 3 is a schematic structural diagram of a first connecting member according to an embodiment of the present application.

Referring to fig. 2 and 3, the first connection member 30 and the second connection member 40 are respectively provided with a pair of opposite portions 1302, 1303, a groove 60 for receiving a corresponding tab of the cell is formed between the pair of opposite portions 1302, 1303, at least one of the pair of opposite portions 1302, 1303 is provided with a first through hole 70 communicated with the groove 60, and the groove 60 of the first connection member 30 and the groove 60 of the second connection member 40 are arranged opposite to each other.

Specifically, taking the first connector 30 as an example, the first connector 30 is provided with a body portion 1301 and a pair of opposite portions 1302 and 1303 extending from the body portion 1301, a groove 60 is formed between the pair of opposite portions 1302 and 1303, and the height and depth of the groove 60 are matched with positive and negative electrode tabs of a battery cell. The opposite portion 1303 is provided with a first through hole 70 communicated with the groove 60, the through hole 70 may be a threaded hole, and after the positive electrode tab of the battery cell extends into the groove 60, the first bolt 80 is screwed into the groove 60 through the threaded hole to press the positive electrode tab of the battery cell into the groove 60 of the first connecting member 30, so as to be positioned. The second connecting member 40 may have a symmetrical structure with the first connecting member 30 such that the grooves 60 of the two are opposite to each other, and thus, the description thereof is omitted. It is understood that the first through hole may also open at the opposite portion 1302.

In an implementation manner, the cell testing tool further includes a tab pressing piece 90 disposed in the groove 60 and used for pressing a cell tab, and the first bolt 80 screwed into the groove 60 presses a positive tab of the cell in the groove 60 of the first connecting member 30 through the tab pressing piece 90.

In one implementation, the tab pressing piece 90 may be fixed at the end of the portion of the first bolt 80 entering the groove 60, and the cell tab may be disposed between the tab pressing piece 90 and the opposite portion 1302, so that the tab pressing piece 90 at the end of the first bolt 80 can press the cell tab in the groove 60 of the first connecting member 30 by screwing the first bolt 80.

The application provides a battery core test fixture, put into recess 60 with the utmost point ear of battery core, utmost point ear pressing sheet 90 arranges battery core utmost point ear in and is close to one side of first bolt 80. The tab of the battery cell entering the groove 60 is pressed by the sheet structure of the tab pressing piece 90, the contact area between the corresponding tab of the battery cell and the first connecting piece 30 and the contact area between the corresponding tab of the battery cell and the second connecting piece 40 can be increased, the pressure on the tab pressing piece 90 can be increased by screwing the first bolt 80 into the groove 60, so that the positive and negative tabs of the battery cell are in close contact with the first connecting piece 30 and the second connecting piece 40, the contact surface is smooth, the contact internal resistance between the corresponding tab of the battery cell and the first connecting piece 30 and the second connecting piece 40 can be effectively reduced, and the accuracy of a battery cell performance test result is improved.

Fig. 4 is a schematic structural diagram of a cell testing tool according to another embodiment of the present application; FIG. 5 is a front view of FIG. 4; fig. 6 is a right side view of fig. 4. In this embodiment, a battery holder, a first connecting member, and a second connecting member substantially the same as those of fig. 2 and 3 may be used.

Referring to fig. 2 to 6, the support base 10 includes a first cross bar 106 and a second cross bar 107 disposed in parallel at the top end of the vertical direction, a third cross bar 108 and a fourth cross bar 109 disposed in parallel at the bottom end of the vertical direction, each side of the support base 10 includes a first connecting bar 1010 connecting the first cross bar 106 and the third cross bar 108, a second connecting bar 1011 connecting the second cross bar 107 and the fourth cross bar 109, a third connecting bar 1012 connecting the third cross bar 108 and the fourth cross bar 109, and a fourth connecting bar 1013 connecting the first cross bar 106 and the second cross bar 107, and the distance between the first cross bar 106 and the second cross bar 107 is smaller than the distance between the third cross bar 108 and the fourth cross bar 109, so that the fourth connecting bar 1013 is narrower than the third connecting bar 1012, and thus the first connecting bar 1010 to the fourth connecting bar 1013 form a trapezoidal frame as shown in fig. 6. The distance between the third cross bar 108 and the fourth cross bar 109 is greater than the distance between the first cross bar 106 and the second cross bar 107, so that the bottom frame body of the support seat is wider than the top frame body, which is beneficial to preventing the support seat 10 from toppling.

It will be appreciated that the support base may have other configurations. For example, in another implementation, the supporting seat includes a first cross bar disposed at the top end of the vertical direction, a third cross bar and a fourth cross bar disposed at the bottom end of the vertical direction in parallel, each side of the supporting seat includes a first connecting rod connected to the first cross bar and the third cross bar, a second connecting rod connected to the first cross bar and the fourth cross bar, and a third connecting rod connected to the third cross bar and the fourth cross bar, and the first connecting rod to the third connecting rod can form a triangular conical frame.

In one implementation, the support base 10 is provided with second guide rods 104 on two sides of the cell bracket 20, and the first connecting member 30 and the second connecting member 40 are movably mounted on the corresponding second guide rods 104 in the vertical direction. Of the second guide bars 104 on both sides of the cell bracket 20, at least one of the second guide bars 104 on one side is disposed obliquely with respect to the vertical direction, so that the pitch of the second guide bars 104 on both sides of the cell bracket 20 varies along the vertical direction.

In one implementation, the second guide rods on both sides of the cell bracket are parallel to the vertical arrangement, so that the distance between the second guide rods on both sides of the cell bracket is fixed and unchanged along the vertical direction.

In this embodiment, as shown in fig. 4 and 5, the second guide rods 104 on both sides of the battery cell bracket 20 are symmetrically and obliquely arranged along a direction in which the distance gradually decreases from the vertical top end to the vertical bottom end, so that the second guide rods 104 on both sides of the support seat 10 form an inverted "eight" shape. Two parallel second guide rods 104 are respectively arranged on two sides of a battery cell bracket 20 of a support seat 10 of a test tool of a battery cell, the vertical top of the second guide rod 104 on each side is connected with a top frame of the support seat 10, and the vertical bottom of the second guide rod 104 is connected with a base of the support seat 10. The first connecting piece 30 and the second connecting piece 40 are respectively provided with a second through hole 100, in this embodiment, the second through hole 100 is an inclined hole, and penetrates through the first connecting piece 30 and the second connecting piece 40 and is matched with second guide rods 104 symmetrically inclined at two sides of the battery cell bracket 20, and the first connecting piece 30 and the second connecting piece 40 are respectively and vertically movably installed on two second guide rods 104 at two sides of the supporting seat 10 by using the inclined hole 100. In this embodiment, similar to the previous embodiment, the cell bracket 20 includes three first guide rods 201 and a square outer frame 202, which are parallel to each other and are uniformly distributed, and the first connecting member 30 and the second connecting member 40 are movably mounted on the first guide rods 201 of the cell bracket 20 by using the first through holes 50.

The first connecting member 30 and the second connecting member 40 are respectively provided with a pair of opposite parts 1302 and 1303, a groove 60 is formed between the pair of opposite parts 1302 and 1303, and the first bolt 80 is screwed into the groove 60 through the threaded hole to press the tab of the battery cell into the groove 60.

Similarly, a tab pressing piece 90 may be disposed in the groove 60, the first bolt 80 is screwed into the groove 60, and the cell tab is pressed in the groove 60 by the tab pressing piece 90.

In this embodiment, the first and second connectors 30 and 40 are each provided with the wire connecting portion 110 on both sides of the groove 60. The wire connecting part 110 may be a connecting hole or a connecting groove, or may be a connecting post.

When testing, a battery cell to be tested is placed on the battery cell bracket 20 with the heat dissipation groove 203, the positions of the first connecting piece 30 and the second connecting piece 40 on the first guide rod 201 and the second guide rod 104 are adjusted by moving the first connecting piece 30 and the second connecting piece 40, so that the distance between the first connecting piece 30 and the second connecting piece 40 is matched with the size of the battery cell to be tested, positive and negative lugs of the battery cell are placed in the grooves 60 of the first connecting piece 30 and the second connecting piece 40, and the lug pressing piece 90 is pressed against the positive and negative lugs of the battery cell by screwing the first bolt 80, so that the positive and negative lugs of the battery cell are reliably and electrically connected with the corresponding first connecting piece 30 and the corresponding second connecting piece 40. The first connector 30 and the second connector 40 may be fixed to the first rail 201, and the first connector 30 and the second connector 40 may be positioned by positioning the battery cell bracket 20 on the second rail 104, or the first connector 30 and the second connector 40 may be fixed to the second rail 104, and the first connector 30 and the second connector 40 may be positioned, including but not limited to, by bolts and threaded holes. In this embodiment, the first connecting member 30 and the second connecting member 40 are respectively provided with a third through hole 120, the third through hole 120 is communicated with the corresponding second through hole 100, the third through hole 120 may be a threaded hole matched with a third bolt, and the first connecting member 30 and the second connecting member 40 can be fixed on the second guide rod 104 passing through the second through hole 100 by the third bolt.

In addition, after the positive electrode tab of the battery cell is compressed in the first connecting member 30 and the negative electrode tab of the battery cell is compressed in the second connecting member 40, the positive cable led out from the charge and discharge cabinet is electrically connected to one wire connecting portion 110 of the first connecting member 30, and the positive voltage sampling line is electrically connected to the other wire connecting portion 110 of the first connecting member 30. And the negative voltage sampling line and the negative cable drawn from the charge and discharge cabinet are electrically connected to the wire connection parts 110 at both sides of the groove 60 of the second connection member 40, respectively, in the same manner. Thereafter, the test of the cells may be started by energizing.

To sum up, the test fixture of electric core that this application provided includes: the battery comprises a support seat 10, a battery cell bracket 20 supported by the support seat 10, a first connecting piece 30 for electrically connecting a positive electrode lug of a battery cell, and a second connecting piece 40 for electrically connecting a negative electrode lug of the battery cell; wherein, the battery cell bracket 20 is provided with heat dissipation holes or heat dissipation grooves; the first connecting member 30 and the second connecting member 40 are disposed on two sides of the cell bracket 20, and at least one of the first connecting member 30 and the second connecting member 40 is movably mounted on the cell bracket 20 along a horizontal direction. According to the test tool for the battery core, the battery core bracket 20 with the heat dissipation holes or the heat dissipation grooves is suspended and supported by the supporting seat 10, and the battery core to be tested is placed on the suspended battery core bracket 20 with the heat dissipation holes or the heat dissipation grooves, so that the large-area surface of the battery core can be prevented from being directly attached to a battery core supporting surface in a test environment, the heat dissipation of the surface of the battery core is facilitated, and the measurement error is reduced; at least one of the first connector 30 and the second connector 40 is movably mounted on the cell bracket 20 along the horizontal direction, and the distance between the first connector 30 and the second connector 40 can be adjusted to adapt to cells to be tested with different sizes. The application provides a test fixture of electric core simple structure, the testing personnel of being convenient for operate, can be used for testing the electric core of various sizes, do benefit to the heat dissipation on electric core surface, have improved the degree of accuracy of electric core capability test result.

Further, by arranging at least one of the first connecting piece 30 and the second connecting piece 40 to be movably mounted on the plurality of first guide rods 201, the distance between the first connecting piece 30 and the second connecting piece 40 can be adjusted to adapt to the cells to be tested with different sizes. In addition, the battery cell bracket 20 is provided with the plurality of first guide rods 201, so that the first connecting piece 30 and/or the second connecting piece 40 can stably move on the first guide rods 201, and the first connecting piece 30 and the second connecting piece 40 are prevented from being turned over in the moving process; meanwhile, the plurality of first guide rods 201 also facilitate stable placement of the battery cell to be tested on the battery cell bracket 20.

Further, when the second guide rods 104 are provided at two sides of the cell bracket 20, and the distance therebetween is not changed along the vertical direction, the first connecting member 30 and the second connecting member 40 can have different distances therebetween by moving the first connecting member 30 and/or the second connecting member 40 in the horizontal direction, so that cells to be tested with different sizes can be adapted.

Furthermore, the second guide rods 104 with the intervals changing along the vertical direction are arranged on the two sides of the battery cell bracket 20, and the first connecting piece 30 and the second connecting piece 40 are respectively and movably mounted on the corresponding second guide rods 104 along the vertical direction, so that the first connecting piece 30 and the second connecting piece 40 have different intervals when moving to different vertical positions of the second guide rods 104, and the battery cell bracket can adapt to battery cells to be tested with different sizes.

Further, the test fixture of electric core that this application provided still compresses tightly utmost point ear compressing tightly piece 90 of the corresponding utmost point ear of electric core including locating in recess 60. The tab of the battery cell entering the groove 60 is pressed by the sheet structure of the tab pressing piece 90, so that the contact area between the positive and negative tabs of the battery cell and the first connecting piece 30 and the second connecting piece 40 can be increased, the first bolt 80 is screwed into the groove 60, the pressure on the tab pressing piece 90 is increased, the positive and negative tabs of the battery cell are in close contact with the first connecting piece 30 and the second connecting piece 40, the contact surface is flat, the contact internal resistance between the corresponding tab of the battery cell and the first connecting piece 30 and the second connecting piece 40 can be effectively reduced, and the accuracy of a battery cell performance test result is improved.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The utility model provides a test fixture of electricity core which characterized in that includes: the battery comprises a supporting seat, a battery cell bracket supported by the supporting seat, a first connecting piece used for electrically connecting a positive electrode lug of the battery cell and a second connecting piece used for electrically connecting a negative electrode lug of the battery cell; wherein:

the battery cell bracket is provided with heat dissipation holes or heat dissipation grooves;

the first connecting piece and the second connecting piece are arranged on two sides of the battery cell bracket, and at least one of the first connecting piece and the second connecting piece is movably arranged on the battery cell bracket along the horizontal direction.

2. The test tool of claim 1, wherein:

the battery cell bracket is provided with a plurality of first guide rods which extend in the horizontal direction and are arranged at intervals, the heat dissipation grooves are formed between the adjacent first guide rods, and at least one of the first connecting piece and the second connecting piece is movably arranged on the plurality of first guide rods.

3. The test tool of claim 2, wherein:

the first connecting piece and the second connecting piece are respectively provided with a plurality of through holes, and two ends of a plurality of first guide rods of the battery cell bracket respectively penetrate through the through holes of the first connecting piece and the second connecting piece.

4. The test tool of claim 1, wherein:

the first connecting piece and the second connecting piece are respectively provided with a pair of opposite parts, a groove for accommodating corresponding lugs of the battery core is formed between the opposite parts, at least one of the opposite parts is provided with a through hole communicated with the groove, and the groove of the first connecting piece and the groove of the second connecting piece are arranged oppositely.

5. The test tool of claim 4, wherein:

the battery cell structure is characterized by further comprising a tab pressing piece arranged in the groove and used for pressing the corresponding tab of the battery cell.

6. The test tool of claim 4, wherein:

the first connecting piece and the second connecting piece are respectively provided with wire connecting parts at two sides of the groove.

7. The test tool of claim 1, wherein:

the supporting seat comprises a first cross rod and a second cross rod which are arranged at the vertical top end in parallel, and a third cross rod and a fourth cross rod which are arranged at the vertical bottom end in parallel, each side of the supporting seat comprises a first connecting rod connected with the first cross rod and the third cross rod, a second connecting rod connected with the second cross rod and the fourth cross rod, a third connecting rod connected with the third cross rod and the fourth cross rod, and a fourth connecting rod connected with the first cross rod and the second cross rod, the fourth connecting rod is narrower than the third connecting rod, and the first connecting rod to the fourth connecting rod form a trapezoidal frame; alternatively, the first and second electrodes may be,

the supporting seat is including locating the first horizontal pole on vertical top, parallel third horizontal pole and the fourth horizontal pole of locating vertical bottom, each side of supporting seat is including connecting the head rod, the connection of first horizontal pole and third horizontal pole the second connecting rod and the connection of first horizontal pole and fourth horizontal pole the third connecting rod of third horizontal pole and fourth horizontal pole, head rod to third connecting rod form three triangle-shaped conical frame.

8. The test tool according to any one of claims 1 to 7, wherein:

the supporting seat is in the both sides of electricity core bracket respectively are equipped with the second guide arm, first connecting piece and second connecting piece are respectively along vertical movably install in the second guide arm that corresponds.

9. The test tool of claim 8, wherein:

at least one of the second guide rods on one side of the second guide rods on the two sides of the battery cell bracket is obliquely arranged relative to the vertical direction, so that the distance between the second guide rods on the two sides of the battery cell bracket is changed along the vertical direction; alternatively, the first and second electrodes may be,

the second guide rods on the two sides of the battery cell bracket are arranged in parallel to the vertical direction, so that the distance between the second guide rods on the two sides of the battery cell bracket is fixed along the vertical direction.

10. The test tool of claim 8, wherein:

the second guide rods on two sides of the battery cell bracket are symmetrically and obliquely arranged along the direction which is gradually reduced from the vertical top end to the vertical bottom end.

Images