CN219758324U

CN219758324U - Battery test fixture

Info

Publication number: CN219758324U
Application number: CN202320901821.7U
Authority: CN
Inventors: 马学明; 亢诗雨; 周江; 邹武俊
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-09-26
Anticipated expiration: 2033-04-20

Abstract

The embodiment of the utility model provides a battery test fixture, and relates to the technical field of battery test. The battery test fixture comprises a bottom plate, a movable plate, a top plate, a connecting rod, a pressure sensor and a telescopic driving piece, wherein the pressure sensor and the telescopic driving piece are used for being electrically connected with a controller; the bottom plate, the movable plate and the top plate are sequentially arranged along the axial direction of the connecting rod; the movable plate is in sliding fit with the connecting rod, two ends of the connecting rod are respectively fixedly arranged on the bottom plate and the top plate, and the bottom plate and the movable plate are used for clamping and placing batteries; the pressure sensor is arranged on the surface of the movable plate, facing the top plate, of the movable plate, the telescopic driving piece is fixedly arranged on the top plate, and the driving end of the telescopic driving piece is in sliding fit with the top plate; the driving end of the telescopic driving piece is fixedly connected with a trigger piece which is used for acting on the pressure sensor, and the clamping force can be controlled accurately.

Description

Battery test fixture

Technical Field

The utility model relates to the technical field of battery testing, in particular to a battery testing clamp.

Background

In the performance test of lithium ion batteries, it is often necessary to test the performance of the battery under a certain pressure, and then a clamp is required to apply a certain pressure to the battery. Because in long-term test process, can produce gas in the battery, the gas that produces in the battery can cause the battery to bulge, and the inflation of battery can make the anchor clamps power grow gradually, consequently, in order to guarantee that the anchor clamps power is unchangeable in the whole test process, just need in time adjust the anchor clamps power of anchor clamps. In addition, in the long-term test process, a person cannot adjust the clamp force at the clamp at any time, so that a device capable of adjusting the clamp force in real time and accurately needs to be studied.

Disclosure of Invention

Objects of the present utility model include, for example, providing a battery test fixture that is capable of relatively precisely controlling the fixture force.

Embodiments of the utility model may be implemented as follows:

the embodiment of the utility model provides a battery test fixture, which comprises a bottom plate, a movable plate, a top plate, a connecting rod, a pressure sensor and a telescopic driving piece, wherein the pressure sensor and the telescopic driving piece are used for being electrically connected with a controller;

the bottom plate, the movable plate and the top plate are sequentially arranged along the axial direction of the connecting rod, wherein two ends of the connecting rod are respectively fixedly arranged on the bottom plate and the top plate; the movable plate is in sliding fit with the connecting rod, and the bottom plate and the movable plate are used for clamping and placing batteries;

the pressure sensor is arranged on the surface of the movable plate, facing the top plate, of the movable plate, the telescopic driving piece is fixedly arranged on the top plate, and the driving end of the telescopic driving piece is in sliding fit with the top plate; the driving end of the telescopic driving piece is fixedly connected with a trigger piece which is used for acting on the pressure sensor.

Optionally, the fly leaf is towards be provided with the mounting groove on the face of roof, pressure sensor set up in the mounting groove.

Optionally, a heat dissipation plate is fixedly arranged on one side of the bottom plate facing the movable plate and/or one side of the movable plate facing the bottom plate; the heat dissipation plate is in sliding fit with the connecting rod; and cooling pipes are arranged between the cooling plate and the bottom plate and/or between the cooling plate and the movable plate, and each cooling pipe is provided with a water inlet end and a water outlet end.

Optionally, a face indent of heating panel forms the standing groove, the cooling tube sets up in the standing groove, the water inlet end and the play water end of cooling tube all run through the heating panel.

Optionally, a spring is sleeved outside the connecting rod, and one end of the spring is fixedly connected with the movable plate; the other end of the spring is fixedly connected with the bottom plate.

Optionally, the battery test fixture further includes a protection plate for protecting a tester from injury when the battery fails thermally, the protection plate is disposed along an axial direction of the connecting rod, and one end of the protection plate is fixed on the movable plate or the bottom plate.

Optionally, the protection plate is a foldable plate, the foldable plate comprises a plurality of plate units which are sequentially arranged along the axial direction of the connecting rod, and two adjacent plate units are hinged together; two plate units positioned at the most edge of the foldable plate are fixedly connected with the movable plate and the bottom plate respectively.

Optionally, the trigger piece includes depression bar and clamp plate, the one end of depression bar with flexible drive piece's drive end links firmly, the other end of depression bar with the clamp plate links firmly, the clamp plate is used for acting on pressure sensor's trigger end.

Optionally, the telescopic driving piece is an electric telescopic rod.

Optionally, both ends of the connecting rod along the axis direction of the connecting rod are threaded sections.

The battery test fixture provided by the embodiment of the utility model has the beneficial effects that: when a battery test is required, firstly placing the battery between the bottom plate and the movable plate, then controlling the telescopic driving piece to work, driving the trigger piece to move towards the direction close to the movable plate by the telescopic driving piece, applying pressure to the movable plate by the trigger piece through the pressure sensor, and stopping working by the telescopic driving piece when the pressure value fed back by the pressure sensor reaches the preset clamp force; in the battery test process, the battery bulge makes the clamp force continuously become large, and after the pressure sensor transmits the numerical value to the controller, the telescopic driving piece drives the trigger piece to move towards the direction away from the movable plate, so that the clamp force is reduced to the preset clamp force, and the effect of accurately controlling the clamp force is achieved.

Drawings

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

FIG. 1 is a schematic view of a first battery test fixture according to an embodiment of the present utility model;

fig. 2 is an exploded view for showing an internal structure of a heat dissipating plate according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a second battery testing jig according to an embodiment of the present utility model.

Icon: 100-a bottom plate; 200-a movable plate; 210-mounting slots; 300-top plate; 400-connecting rod; 410-a spring; 500-pressure sensor; 600-telescoping drive; 610-trigger; 611-a compression bar; 612-pressing plates; 700-heat dissipation plate; 710—a placement tank; 800-cooling pipes; 810-a water inlet end; 820-water outlet end; 900-guard plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

The inventor of the utility model discovers that in the long-term test process of the lithium ion battery, gas is generated in the battery, the gas in the battery can cause the battery to bulge, and in the process of giving certain clamp force to the battery by using the clamp, the expansion of the battery can gradually enlarge the clamp force, so that when the influence of different clamp forces on the performance of the battery is studied, the inaccuracy of the clamp force can be caused, and even the judgment of the test result can be influenced. To this end, embodiments of the present utility model provide a battery test fixture, at least for solving the technical problem.

Referring to fig. 1 and 2, an embodiment of the present utility model provides a battery test fixture including a bottom plate 100, a movable plate 200, a top plate 300, a connecting rod 400, and a pressure sensor 500 and a telescopic driving member 600 for electrically connecting with a controller; the bottom plate 100, the movable plate 200 and the top plate 300 are sequentially arranged along the axial direction of the connecting rod 400, wherein two ends of the connecting rod 400 are respectively fixedly arranged on the bottom plate 100 and the top plate 300; the movable plate 200 is in sliding fit with the connecting rod 400; the base plate 100 and the movable plate 200 are used to hold the battery; the pressure sensor 500 is arranged on the plate surface of the movable plate 200 facing the top plate 300, the telescopic driving piece 600 is fixedly arranged on the top plate 300, and the driving end of the telescopic driving piece 600 is in sliding fit with the top plate 300; the driving end of the telescopic driving member 600 is fixedly connected with a trigger member 610 for acting on the pressure sensor 500.

In the battery test process, a battery is placed between the bottom plate 100 and the movable plate 200, the driving end of the telescopic driving piece 600 drives the trigger piece 610 to move towards the direction close to the movable plate 200, so that the trigger piece 610 applies pressure to the movable plate 200 through the pressure sensor 500, the pressure sensor 500 returns a specific value to the controller, the telescopic driving piece 600 stops when a preset clamp force is achieved, in the long-term test process, the battery bulge makes the clamp force continuously become large, after the pressure sensor 500 transmits the value to the controller, the telescopic driving piece 600 drives the trigger piece 610 to move towards the direction far away from the movable plate 200, and the clamp force is reduced to the preset clamp force, so that the effect of accurately controlling the clamp force is achieved.

In an alternative embodiment, a mounting groove 210 is provided on a plate surface of the movable plate 200 facing the top plate 300, and the pressure sensor 500 is provided in the mounting groove 210.

It should be noted that the mounting groove 210 is provided to facilitate the fixation of the pressure sensor 500; wherein the shape of the mounting groove 210 is adapted to the shape of the pressure sensor 500, for example, the shape of the mounting groove 210 may be circular, square, etc.

In an alternative embodiment, a heat dissipation plate 700 is fixedly provided on a side of the base plate 100 facing the movable plate 200 and/or a side of the movable plate 200 facing the base plate 100; cooling pipes 800 are provided between the heat radiating plate 700 and the bottom plate 100 and/or between the heat radiating plate 700 and the movable plate 200, and the cooling pipes 800 have a water inlet end 810 and a water outlet end 820.

Note that, the heat sink 700 may or may not have a connection relationship with the link 400, as long as the heat sink 700 is fixed to the movable plate 200 and/or the heat sink 700 is fixed to the base plate 100. In the embodiment, the side of the bottom plate 100 facing the movable plate 200 and the side of the movable plate 200 facing the bottom plate 100 are fixedly provided with heat dissipation plates 700, and the two heat dissipation plates 700 are in sliding fit with the connecting rod 400; the battery is sandwiched between two heat dissipation plates 700.

In the battery test process, the battery is arranged between the two heat dissipation plates 700, when the battery needs to be dissipated, firstly, cooling liquid enters from the water inlet end 810 of the cooling pipe 800, then, the cooling liquid flows through the cooling pipe 800 and then is discharged from the cooling pipe 800, and the cooling liquid can enable the heat dissipation plates 700 to take away heat generated by the battery operation in the flowing process of the cooling pipe 800, so that the purpose of cooling the battery is achieved.

In an alternative embodiment, a plate surface of the heat dissipation plate 700 is concaved inwards to form the placement groove 710, the cooling pipe 800 is disposed in the placement groove 710, and the water inlet end 810 and the water outlet end 820 of the cooling pipe 800 penetrate through the heat dissipation plate 700.

It should be noted that the heat sink 700 connected to the bottom plate 100 is provided with a placement groove 710 toward the plate surface of the bottom plate 100, the heat sink 700 connected to the movable plate 200 is provided with a placement groove 710 toward the plate surface of the movable plate 200, both placement grooves 710 are used for providing the cooling pipe 800, and the water inlet end 810 and the water outlet end 820 of the cooling pipe 800 are both penetrated out from the side surfaces of the heat sink 700 so as to be connected to an external cooling liquid circulation line.

In an alternative embodiment, it was found necessary to manually move the movable plate 200 in a direction away from the base plate 100 so that the battery can be placed between the movable plate 200 and the base plate 100, which is time consuming and laborious. For this purpose, referring to fig. 3, a spring 410 is sleeved outside the connecting rod 400, one end of the spring 410 is fixedly connected with the movable plate 200, and the other end of the spring 410 is fixedly connected with the bottom plate 100. The arrangement of the springs 410 makes the movable plate 200 and the base plate 100 form a receiving space for placing the battery, and the placement of the battery is convenient. In addition, after the battery test is completed, the movable plate 200 may be restored under the action of the spring 410 as long as the force applied to the movable plate 200 is removed.

If the heat dissipation plates 700 are disposed on both the base plate 100 and the movable plate 200, both ends of the spring 410 are respectively fixed to the two heat dissipation plates 700. In addition, the number of the springs 410 may be one-to-one corresponding to the number of the links 400, for example, the number of the links 400 is four, and the four links 400 are sleeved with the springs 410.

In addition, the battery test fixture further includes a protection plate 900 for protecting a tester from injury when the battery is thermally disabled, the protection plate 900 being disposed along the axial direction of the link 400, one end of the protection plate 900 being fixed to the movable plate 200 or the base plate 100. When the battery is tested, the explosion-proof valve of the clamped battery is just opposite to the protection plate 900, so that when the battery is in thermal failure, the protection plate 900 forms a protection between a tester and the battery, and substances sprayed out of the explosion-proof valve of the battery can be blocked to protect the tester from being damaged.

In some embodiments, a plurality of shielding plates 900 may be disposed around the movable plate 200, and the plurality of shielding plates 900 shield the battery in a plurality of directions, thereby protecting the tester from injury in all directions when the battery is thermally failed.

In some embodiments, the shielding plate 900 is a foldable plate including a plurality of plate units disposed in sequence along the axial direction of the link 400, and adjacent two plate units are hinged together; two plate units positioned at the extreme edges of the foldable plate are respectively fixedly connected with the movable plate 200 and the bottom plate 100.

It should be noted that the foldable plate is in an unfolded state when the battery test fixture is not in operation, and in a folded state when the battery test fixture is in operation.

In addition, the protection plate 900 can be made of transparent materials, so that an operator can observe the battery test conditions conveniently.

In an alternative embodiment, the trigger member 610 includes a pressing rod 611 and a pressing plate 612, one end of the pressing rod 611 is fixedly connected with the driving end of the telescopic driving member 600, the other end of the pressing rod 611 is fixedly connected with the pressing plate 612, and the pressing plate 612 is used to act on the trigger end of the pressure sensor 500.

The driving end of the telescopic driving piece 600 is fixedly connected with one end of a pressing rod 611, the other end of the pressing rod 611 is fixedly connected with a pressing plate 612, and the pressing plate 612 gives pressure to the triggering end of the pressure sensor 500 under the driving of the telescopic driving piece 600.

In an alternative embodiment, telescoping drive 600 is an electric telescoping rod.

The driving end of the electric telescopic rod is fixedly connected with one end of the compression bar 611, and the compression plate 612 can be driven to lift in the process of stretching the electric telescopic rod.

In other embodiments, the telescopic driving member 600 may also have a rack-and-pinion structure, where a rack is fixedly connected to one end of the pressing rod 611, and the rack moves along the length direction of the connecting rod 400 during the rotation of the motor driving the gear, so as to drive the pressing rod 611 and the pressing plate 612 to lift.

In other embodiments, the telescopic driving member 600 may also be a worm and gear structure, wherein a worm is fixedly connected to one end of the pressing rod 611, and the worm moves along the length direction of the connecting rod 400 in the process of driving the worm to rotate by the motor, so as to drive the pressing rod 611 and the pressing plate 612 to lift.

It is understood that the driving member capable of driving the pressing rod 611 and the pressing plate 612 to lift can be used as the driving source of the pressing rod 611 and the pressing plate 612.

In an alternative embodiment, the connecting rod 400 has threaded segments at both ends in the direction of its own axis.

The top plate 300 is provided with a through hole, and the top thread section of the connecting rod 400 passes through the through hole on the top plate 300 and then is matched with the nut; the bottom plate 100 or the heat dissipation plate 700 connected with the bottom plate 100 is provided with a threaded hole, if the bottom plate 100 is not connected with the heat dissipation plate 700, the bottom thread section of the connecting rod 400 is matched with the threaded hole on the bottom plate 100, and if the bottom plate 100 is connected with the heat dissipation plate 700, the bottom thread section of the connecting rod 400 is matched with the threaded hole on the heat dissipation plate 700.

In summary, the embodiment of the utility model provides a battery test fixture, in which a battery is placed between a base plate 100 and a movable plate 200 in a battery test process, a driving end of an electric telescopic rod drives a pressing plate 612 to move downwards until the pressing plate 612 applies pressure to a pressure sensor 500 and the movable plate 200, the pressure sensor 500 returns a specific value to a controller, and the electric telescopic rod stops stretching when a preset fixture force is achieved, in a long-term test process, the battery bulges to enable the fixture force to be continuously increased, and after the pressure sensor 500 transmits the value to the controller, the electric telescopic rod reversely drives the pressing plate 612 to rise, so that the fixture force is reduced to the preset fixture force, and an effect of accurately controlling the fixture force is achieved.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. The battery test fixture is characterized by comprising a bottom plate (100), a movable plate (200), a top plate (300), a connecting rod (400), a pressure sensor (500) and a telescopic driving piece (600), wherein the pressure sensor (500) is used for being electrically connected with a controller;

the bottom plate (100), the movable plate (200) and the top plate (300) are sequentially arranged along the axial direction of the connecting rod (400), wherein two ends of the connecting rod (400) are respectively fixedly arranged on the bottom plate (100) and the top plate (300); the movable plate (200) is in sliding fit with the connecting rod (400), and the bottom plate (100) and the movable plate (200) are used for clamping and placing batteries;

the pressure sensor (500) is arranged on the plate surface of the movable plate (200) facing the top plate (300), the telescopic driving piece (600) is fixedly arranged on the top plate (300), and the driving end of the telescopic driving piece (600) is in sliding fit with the top plate (300); the driving end of the telescopic driving piece (600) is fixedly connected with a triggering piece (610) used for acting on the pressure sensor (500).

2. The battery test fixture according to claim 1, wherein a mounting groove is provided on a plate surface of the movable plate (200) facing the top plate (300), and the pressure sensor (500) is provided in the mounting groove.

3. The battery test fixture according to claim 1, wherein a heat dissipation plate (700) is fixedly provided on a side of the bottom plate (100) facing the movable plate (200) and/or a side of the movable plate (200) facing the bottom plate (100); the heat radiation plate (700) is in sliding fit with the connecting rod (400); cooling pipes (800) are arranged between the cooling plate (700) and the bottom plate (100) and/or between the cooling plate (700) and the movable plate (200), and the cooling pipes (800) are provided with water inlet ends (810) and water outlet ends (820).

4. The battery test fixture of claim 3, wherein a plate surface of the heat dissipation plate (700) is concavely formed into a placement groove (710), the cooling pipe (800) is disposed in the placement groove (710), and both a water inlet end (810) and a water outlet end (820) of the cooling pipe (800) penetrate through the heat dissipation plate (700).

5. The battery test fixture according to claim 1, wherein a spring (410) is sleeved outside the connecting rod (400), and one end of the spring (410) is fixedly connected with the movable plate (200); the other end of the spring (410) is fixedly connected with the bottom plate (100).

6. The battery test fixture according to claim 1, further comprising a protection plate (900) for protecting a tester from injury when the battery is thermally failed, the protection plate (900) being disposed along an axial direction of the link (400), one end of the protection plate (900) being fixed to the movable plate (200) or the base plate.

7. The battery test fixture according to claim 6, wherein the protection plate (900) is a foldable plate including a plurality of plate units disposed in sequence along an axial direction of the link (400), adjacent two of the plate units being hinged together; two plate units positioned at the extreme edge in the foldable plate are respectively fixedly connected with the movable plate (200) and the bottom plate (100).

8. The battery test fixture according to claim 1, wherein the trigger member (610) comprises a pressing rod (611) and a pressing plate (612), one end of the pressing rod (611) is fixedly connected with the driving end of the telescopic driving member (600), the other end of the pressing rod (611) is fixedly connected with the pressing plate (612), and the pressing plate (612) is used for acting on the trigger end of the pressure sensor (500).

9. The battery test fixture of claim 1, wherein the telescoping drive (600) is an electric telescoping rod.

10. The battery test fixture according to claim 1, wherein both ends of the connecting rod (400) in the direction of its own axis are screw thread segments.