CN219392090U - Battery cell expansion detection structure with standard weight - Google Patents

Abstract

The utility model discloses a battery cell expansion detection structure with a standard weight, which comprises a detection table, a detection jig, a standard weight, a bracket and a displacement detection instrument, wherein the detection table is arranged on the detection jig; the detection jig is arranged on the detection table, and the upper end surface of the detection jig is provided with a movable pin capable of axially moving; the standard weight is detachably arranged at the upper end part of the movable pin; the bracket is arranged above the standard weight in a suspending way; the displacement detection instrument is arranged on the bracket, is arranged opposite to the standard weight and is used for detecting the height variation of the standard weight. The utility model provides constant pressure for the movable pin by using the standard weight, thereby providing constant pressure for the battery expansion detection in a low-cost mode, and having the advantages of easy operation and stable pressure.

Description

Battery cell expansion detection structure with standard weight

Technical Field

The utility model relates to the technical field of battery safety detection, in particular to a battery cell expansion detection structure with a standard weight.

Background

In the case of performing battery safety detection, particularly in an experiment of performing power-on detection on a bare cell, the bare cell is usually placed in a detection jig, and an electrolyte is added to simulate the battery, and then power-on starting detection is performed. Meanwhile, the detection jig is generally provided with an axially movable pin for pressing the bare cell in the detection jig, and then the thickness variation of the bare cell in the charge and discharge process can be measured by detecting the axial movement amount of the movable pin.

In some test items, a movable pin is required to apply a certain constant pressure to a bare cell, so as to test the variation of the expansion thickness of the cell under a certain constant pressure condition. In the prior art, the mode of applying constant pressure comprises manual mode and electric mode, but has certain drawbacks: the hand-operated screw drives the movable pin, and as the hand-operated screw is in threaded connection with the detection tool, the hand-operated screw is easily influenced by the reaction force generated during the expansion of the bare cell to generate movement, so that the provided pressure is unstable, and meanwhile, the precision of a manual mode is low, so that the requirement of a high-precision experiment cannot be met; the latter drives the movable pin through mechanical devices such as an air cylinder or a motor screw rod, and the like, has extremely high precision requirements on the mechanical devices, leads to high cost, and has the defect that the movable pin cannot be used when power is off.

Disclosure of Invention

The utility model aims to provide a battery cell expansion detection structure with a standard weight, which provides constant pressure for battery expansion detection in a low-cost mode and has the advantages of easiness in operation and stable pressure.

In order to achieve the above object, the solution of the present utility model is:

the utility model provides a take electric core inflation detection structure of standard weight, includes detection platform, detection tool, standard weight, support and displacement detection instrument; the detection jig is arranged on the detection table, and the upper end surface of the detection jig is provided with a movable pin capable of axially moving; the standard weight is detachably arranged at the upper end part of the movable pin; the bracket is arranged above the standard weight in a suspending way; the displacement detection instrument is arranged on the bracket, is arranged opposite to the standard weight and is used for detecting the height variation of the standard weight.

The detection table and the support are arranged on the detection equipment.

Preferably, the detection equipment is provided with a hand-operated lifting table, and the detection table is arranged on the hand-operated lifting table.

The detection jig comprises an upper shell and a lower shell which are in up-down airtight fit, and a closed detection cavity is formed between the upper shell and the lower shell; binding posts are connected to the peripheral surfaces of the upper shell and the lower shell; the movable pin is hermetically penetrated through the upper shell; and the inner side end part of the movable pin is sleeved with a spring for keeping the trend of the movable pin to be pressed down.

The standard weight is in threaded connection with the upper end part of the movable pin.

The standard weight is in a cylindrical shape and is coaxially arranged with the movable pin.

After the technical scheme is adopted, the utility model has the following technical effects:

(1) the detachable standard weight is arranged at the upper end part (namely the outer end part) of the movable pin, and according to different experimental requirements, the standard weight with different weights can be selected to be matched with the movable pin so as to realize the application of constant pressure, further the thickness variation of the battery cell in the charging and discharging process under the constant pressure condition is detected, the pressure provided by the standard weight is very stable, and the stability of detection data can be improved;

(2) the standard weight is detachably connected with the movable pin, so that the disassembly and the replacement are convenient and the operation is easy;

(3) the axial displacement of the movable pin can be detected by detecting the height variation of the standard weight through the displacement detecting instrument, so that the thickness variation of the obtained battery cell is obtained, accessories of the whole structure are fewer, the cost is lower, and experimental error factors are fewer easily.

Drawings

FIG. 1 is a perspective view of an embodiment of the present utility model;

FIG. 2 is a front view of an embodiment of the present utility model;

reference numerals illustrate:

1- - -a detection station;

2- - -detecting a jig; 21- - -a movable pin; 22- - -upper shell; 23- - -lower shell; 24- -binding post;

3- - -standard weight;

4- - -a stent;

5- - -a displacement detecting instrument;

6- -a detection device;

7- -hand-operated lifting table.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

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.

Accordingly, 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 embodiments of the present utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in place when the inventive product is used, or the orientation or positional relationship conventionally understood by those skilled in the art, is merely for convenience in describing the embodiments of the present utility model, and is not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, electrically connected or can be communicated with each other; 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 present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 and 2, the utility model discloses a battery cell expansion detection structure with a standard weight, which comprises a detection table 1, a detection jig 2, a standard weight 3, a bracket 4 and a displacement detection instrument 5;

the detection jig 2 is placed on the detection table 1, the upper end surface of the detection jig is provided with a movable pin 21 capable of moving axially, and the movable pin 21 or the movable pin 21 is matched with a pressing plate in the detection jig 2 to press and fix a bare cell to be detected or a pole piece to be detected in the detection jig 2;

the standard weight 3 is detachably mounted at the upper end of the movable pin 21;

the bracket 4 is suspended above the standard weight 3;

the displacement detecting instrument 5 is installed on the bracket 4 and is arranged opposite to the standard weight 3, and is used for detecting the height variation of the standard weight 3, namely detecting the thickness variation of the bare cell to be detected or the pole piece to be detected in the detecting jig 2 in the charging and discharging process.

Specific embodiments of the utility model are shown below.

The detection table 1 and the bracket 4 are both arranged on the detection equipment 6.

Further, the above-mentioned detection device 6 is provided with a hand-operated lifting table 7, the detection table 1 is arranged on the hand-operated lifting table 7, and an operator can adjust the detection table 1 to a proper height by operating the hand-operated lifting table 7, so as to facilitate operation.

The detecting jig 2 comprises an upper shell 22 and a lower shell 23 which are matched up and down in a sealing way, a sealed detecting cavity is formed between the upper shell 22 and the lower shell 23, a bare cell to be detected or a pole piece to be detected is placed in the detecting cavity, and a proper amount of electrolyte is added to simulate the working environment of a battery; the peripheral surfaces of the upper shell 22 and the lower shell 23 are connected with binding posts 24 which are used for connecting the anode and the cathode of power supply equipment to realize the electrification of a 'simulated battery'; the movable pin 21 is hermetically penetrated through the upper shell 22, and the inner side end part of the movable pin is provided with a pressing block or is connected with a pressing plate so as to realize the pressing and fixing of the bare cell to be tested or the pole piece to be tested; the inner end of the movable pin 21 is sleeved with a spring (conventional design, not shown in the drawings) for maintaining the tendency of the movable pin 21 to be depressed.

The standard weight 3 is in threaded connection with the upper end part of the movable pin 21, so that the installation and the disassembly are convenient, and the operation is easy.

The weight 3 is in a cylindrical shape and is coaxially disposed with the movable pin 21 to ensure that the gravity of the weight 3 is more stably applied to the movable pin 21.

The weight of the standard weight 3 is set to different grades according to the experimental requirements, such as 0.5kg, 1.0kg, 2.0kg and the like.

According to the scheme, the detachable standard weight 3 is arranged at the upper end part (namely the outer end part) of the movable pin 21, and according to different experimental requirements, the standard weight 3 with different weights can be selected to be matched with the movable pin 21 so as to realize constant pressure application, further the thickness variation of the battery cell in the charging and discharging process under the constant pressure condition is detected, the pressure provided by the standard weight 3 is very stable, and the stability of detection data can be improved; the standard weight 3 is detachably connected with the movable pin 21, so that the disassembly and the replacement are convenient and the operation is easy; the axial displacement of the movable pin 21 can be detected by detecting the height variation of the standard weight 3 through the displacement detecting instrument 5, so that the thickness variation of the obtained battery cell is obtained, accessories of the whole structure are fewer, the cost is lower, and experimental error factors are fewer easily.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (6)

1. Take electricity core inflation detection structure of standard weight, its characterized in that:

the device comprises a detection table, a detection jig, a standard weight, a bracket and a displacement detection instrument;

the detection jig is arranged on the detection table, and the upper end surface of the detection jig is provided with a movable pin capable of axially moving;

the standard weight is detachably arranged at the upper end part of the movable pin;

the bracket is arranged above the standard weight in a suspending way;

the displacement detection instrument is arranged on the bracket, is arranged opposite to the standard weight and is used for detecting the height variation of the standard weight.

2. The battery cell expansion detection structure with a standard weight as set forth in claim 1, wherein:

the detection table and the support are arranged on the detection equipment.

3. The battery cell expansion detection structure with a standard weight as set forth in claim 2, wherein:

the detection equipment is provided with a hand-operated lifting table, and the detection table is arranged on the hand-operated lifting table.

4. The battery cell expansion detection structure with a standard weight as set forth in claim 1, wherein:

the detection jig comprises an upper shell and a lower shell which are in up-down airtight fit, and a closed detection cavity is formed between the upper shell and the lower shell; binding posts are connected to the peripheral surfaces of the upper shell and the lower shell; the movable pin is hermetically penetrated through the upper shell; and the inner side end part of the movable pin is sleeved with a spring for keeping the trend of the movable pin to be pressed down.

5. The battery cell expansion detection structure with a standard weight as set forth in claim 1, wherein:

the standard weight is in threaded connection with the upper end part of the movable pin.

6. The battery cell expansion detection structure with a standard weight as set forth in claim 1, wherein:

the standard weight is in a cylindrical shape and is coaxially arranged with the movable pin.