CN219531991U - Battery expansion detection tool capable of switching modes - Google Patents

Abstract

The utility model discloses a battery expansion detection tool capable of switching modes, which comprises a top plate, a pressing plate, a bottom plate, an adjusting screw, a pressure sensor, a connecting component and a displacement detection mechanism, wherein the top plate, the pressing plate and the bottom plate are sequentially arranged in parallel from top to bottom; a plurality of guide posts are arranged between the top plate and the bottom plate; the pressing plate is matched with the guide post in a sliding way so as to realize lifting movement; the adjusting screw is vertical to the top plate and penetrates through the top plate in a threaded connection mode; the pressure sensor is fixedly connected to the lower end of the adjusting screw; the connecting component comprises an elastic structure and a rigid structure which can be replaced with each other, and the upper end and the lower end of the connecting component are respectively and detachably connected with the pressure sensor and the pressing plate; the displacement detection mechanism is used for detecting the displacement of the pressing plate. According to the utility model, the connecting component is detachably connected between the pressure sensor and the pressing plate, so that the connecting component is taken as a whole, the disassembly and the assembly are convenient, the problems of inconvenient mode switching and troublesome operation existing in the existing dual-mode detection tool can be solved, and the operation is easy and the efficiency is high.

Description

Battery expansion detection tool capable of switching modes

Technical Field

The utility model relates to the technical field of battery safety detection, in particular to a battery expansion detection tool capable of switching modes.

Background

Lithium ion batteries are new energy batteries which are widely applied at present, and research on related technologies is continuously innovated. In the process of charging and discharging, the lithium ion battery can generate a certain degree of expansion due to the change of the internal active substances, so that a certain expansion force is applied to the outside, and the thickness is changed.

In the prior art, in order to increase the capacity of materials in a limited battery shell space, on the premise of fixing the reaction type of the battery materials, the most direct mode is to increase the compaction density of the battery materials so as to achieve small capacity improvement. However, the increase in the compacted density increases the expansion rate of the material, and after a long period of use, the thickness variation of the battery is relatively significant, which has a very adverse effect on the life of the battery and the side-by-side assembly of a plurality of batteries. Therefore, analyzing the expansion data of the entire life cycle of the battery becomes a key to the design of the battery module. In order to obtain the test data related to the expansion force of the battery, a simple, practical and reliable expansion force detection tool is required to be designed.

The basic working principle of the manual detection tool is that a battery is placed on a bottom plate, a pressing plate is pressed towards the battery through a hand-operated screw rod, the battery is electrified, then expansion detection is achieved according to data change of a detection mechanism, when the detection mechanism acts on the pressing plate, expansion thickness detection is carried out when the detection mechanism is a displacement detection mechanism, and expansion force detection is carried out when the detection mechanism is a pressure detection mechanism. In the prior art, in order to save cost, it is desirable to complete expansion thickness detection and expansion force detection by using the same tool, and then a pressure detection mechanism and a thickness detection mechanism are simultaneously arranged in the detection tool, so that the detection tool is provided with a pressure detection mode and a thickness detection mode simultaneously.

However, when the expansion thickness is detected, the height change of the pressing plate is mainly detected, the pressing plate is driven by a hand-operated screw rod, and after the initial height adjustment of the pressing plate is finished (the pressing plate compresses a battery), the hand-operated screw rod is still and motionless, and then the hand-operated screw rod and the pressing plate are in elastic connection so as to realize the expansion of the battery and drive the pressing plate to displace, and the traditional elastic connection mode is realized by a spring sleeved on a guide rod (for providing a guide effect for the lifting and the moving of the pressing plate); when the expansion force is detected, part of the pressure generated by the battery opposite pressure plate is possibly counteracted by the elastic force of the spring in the process of transmitting the pressure to the pressure detection mechanism, so that the spring is required to be detached and modified into a rigid connection structure, and the interference of the elastic force of the spring on the pressure detection can be avoided, so that the defects of inconvenient mode switching and troublesome operation of the existing dual-mode detection tool are overcome.

Disclosure of Invention

The utility model aims to provide a battery expansion detection tool capable of switching modes, and in order to achieve the purpose, the solution of the utility model is as follows:

a battery expansion detection tool capable of switching modes comprises a top plate, a pressing plate, a bottom plate, an adjusting screw, a pressure sensor, a connecting component and a displacement detection mechanism, wherein the top plate, the pressing plate and the bottom plate are sequentially arranged in parallel from top to bottom; a plurality of guide posts are arranged between the top plate and the bottom plate; the pressing plate is matched with the guide post in a sliding way so as to realize lifting movement; the adjusting screw is perpendicular to the top plate and penetrates through the top plate in a threaded connection mode; the pressure sensor is fixedly connected to the lower end of the adjusting screw rod; the connecting component comprises an elastic structure and a rigid structure which can be replaced with each other, and the upper end and the lower end of the connecting component are respectively and detachably connected with the pressure sensor and the pressing plate; the displacement detection mechanism is used for detecting the displacement of the pressing plate.

When the connecting component is of an elastic structure, the connecting component comprises a first mounting plate, a second mounting plate, a plurality of telescopic sleeves and springs, wherein the first mounting plate and the second mounting plate are arranged in parallel up and down; the upper end and the lower end of the telescopic tube are respectively and fixedly connected with the first mounting plate and the second mounting plate; the spring is sleeved on the telescopic sleeve, and the upper end and the lower end of the spring are respectively abutted against the first mounting plate and the second mounting plate.

When the connecting component is of a rigid structure, the connecting component comprises a first mounting plate, a second mounting plate and a connecting column, wherein the first mounting plate and the second mounting plate are arranged in parallel up and down; the upper end and the lower end of the connecting column are respectively and fixedly connected with the first mounting plate and the second mounting plate.

The upper surface of the pressing plate is provided with a positioning groove for positioning the connecting assembly during installation.

The displacement detection mechanism comprises a displacement sensor and a displacement top block; the displacement sensor is arranged on the side edge of the pressure sensor, and the displacement jacking block is arranged on the upper surface of the pressing plate and is positioned right below the displacement sensor; the displacement sensor is used for detecting the displacement of the displacement top block.

Preferably, the displacement detection mechanism comprises a pull wire sensor and a pull wire terminal; the stay wire sensor is arranged on the lower surface of the top plate, and the stay wire terminal is arranged on the upper surface of the pressing plate and is positioned right below the stay wire sensor; the stay wire sensor is used for detecting the displacement of the stay wire terminal.

Four guide posts are arranged and are respectively arranged at four corners of the bottom plate; the adjusting screw rods are arranged at the center positions of the four guide posts; the pressing plate is provided with a guide sleeve, and the guide sleeve is sleeved on the guide post.

And locking nuts are arranged on the upper and lower sides of the top plate and are in threaded connection with the adjusting screw.

And a mounting seat is arranged between the upper end face of the pressure sensor and the lower end of the adjusting screw.

Preferably, a plane bearing is arranged between the lower end of the adjusting screw and the mounting seat.

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

through connecting coupling assembling detachably between pressure sensor and clamp plate, coupling assembling is as a whole, the dismouting is more convenient, thereby can conveniently carry out the mode of changing the detection fast according to the actual detection demand that detects the frock, can do the inflation thickness detection of battery when coupling assembling is elastic structure, can do the inflation power detection of battery when coupling assembling is rigid structure, and force sensor, displacement detection mechanism all can work simultaneously under two kinds of detection modes, in order to realize detecting the inflation thickness of battery in the state of constant pressure, or detect the inflation power of battery in the state of constant clearance, can get rid of other factors to the interference of testing result, make the precision of testing result higher.

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;

FIG. 3 is a perspective view of a first embodiment of the connection assembly of the present utility model;

FIG. 4 is a perspective view of a second embodiment of the connection assembly of the present utility model;

reference numerals illustrate:

1- - -top plate; 2- - -a pressing plate; 21- - -a positioning groove;

3- - -a bottom plate; 4- - -an adjusting screw; 41- - -a handle;

5- - -a pressure sensor; 6- -a connection assembly; 61— a first mounting plate;

62— a second mounting plate; 63- - -a telescopic tube; 64- - -a spring;

65- -a connecting column; 7- -a guide post; 8- - -a displacement sensor;

9- - -displacing the top block; 10- - -a pull wire sensor; 20- - -pull wire terminal;

30- - -a guide sleeve; 40- - -an adjusting nut; 50- - -a locking nut;

60- -an installation seat; 70-plane bearing.

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 to 4, the utility model discloses a battery expansion detection tool capable of switching modes, which comprises a top plate 1, a pressing plate 2, a bottom plate 3, an adjusting screw 4, a pressure sensor 5, a connecting component 6 and a displacement detection mechanism, wherein the top plate 1, the pressing plate 2 and the bottom plate 3 are sequentially arranged in parallel from top to bottom;

a plurality of guide posts 7 are arranged between the top plate 1 and the bottom plate 3;

the pressing plate 2 is matched with the guide post 7 in a sliding way so as to realize lifting movement;

the adjusting screw 4 is vertical to the top plate 1 and penetrates through the top plate 1 in a threaded connection manner;

the pressure sensor 5 is fixedly connected to the lower end of the adjusting screw 4;

the connecting component 6 comprises an elastic structure and a rigid structure which can be replaced with each other, and the upper end and the lower end of the connecting component are respectively and detachably connected with the pressure sensor 5 and the pressing plate 2;

the displacement detection mechanism is used to detect the displacement amount of the platen 2.

Specific embodiments of the utility model are shown below.

Referring to fig. 3, when the connection assembly 6 is of an elastic structure, the connection assembly 6 includes a first mounting plate 61 and a second mounting plate 62 disposed in parallel up and down, and several pairs of telescopic tubes 63 and springs 64 disposed between the first mounting plate 61 and the second mounting plate 62; the telescopic sleeve 63 has a movable telescopic function, and the upper end and the lower end of the telescopic sleeve are respectively and fixedly connected with the first mounting plate 61 and the second mounting plate 62; the spring 64 is fitted over the telescopic tube 63, and the upper and lower ends thereof are respectively abutted against the first mounting plate 61 and the second mounting plate 62. Since the telescopic tube 63 is connected between the first mounting plate 61 and the second mounting plate 62, the distance between the two plates is variable, and the driving force applied by the adjusting screw 4 can be transmitted to the pressing plate 2 through the elastic force of the spring 64, and meanwhile, when the pressing plate 2 moves upwards under the reaction force of the battery, the spring 64 can be compressed to generate displacement.

Referring to fig. 4, when the connection assembly 6 is a rigid structure, the connection assembly 6 includes a first mounting plate 61 and a second mounting plate 62 disposed in parallel up and down, and a connection post 65 disposed between the first mounting plate 61 and the second mounting plate 62; the upper and lower ends of the connection post 65 are fixedly connected to the first mounting plate 61 and the second mounting plate 62, respectively. That is, the connecting post 65, which is a rigid structure between the first mounting plate 61 and the second mounting plate 62, defines a distance therebetween, and also makes an integral structure that is not variable, so that the pressure plate 2 can completely transmit pressure to the pressure sensor 5 when receiving a reaction force of the battery.

The upper surface of the pressing plate 2 is provided with a positioning groove 21 for positioning when the connecting component 6 is installed, and the upper end and the lower end of the connecting component 6 are fixed in the lower surface of the pressure sensor 5 and the positioning groove 21 by means of screw locking and the like, so that positioning installation is realized.

The displacement detection mechanism comprises a displacement sensor 8 and a displacement top block 9; the displacement sensor 8 is arranged at the side edge of the pressure sensor 5, and the displacement top block 9 is arranged on the upper surface of the pressing plate 2 and is positioned right below the displacement sensor 8; the displacement sensor 8 is used for detecting the displacement of the displacement top block 9, has high precision, and can accurately detect the thickness variation when the battery expands.

Further, the displacement detecting mechanism further includes a pull wire sensor 10 and a pull wire terminal 20; the stay wire sensor 10 is arranged on the lower surface of the top plate 1, and the stay wire terminal 20 is arranged on the upper surface of the pressing plate 2 and is positioned right below the stay wire sensor 10; the pull-wire sensor 10 is used for detecting the displacement of the pull-wire terminal 20, has low accuracy, and can be used for detecting the actual thickness of the battery before the test is performed.

Four guide posts 7 are arranged and are respectively arranged at four corners of the top plate 1/the bottom plate 3; the adjusting screw 4 is arranged at the center of the four guide posts 7 to ensure the stress balance of the pressing plate 2.

The guide sleeve 30 is arranged on the pressing plate 2, and the guide sleeve 30 is sleeved on the guide post 7, so that the sliding fit between the pressing plate 2 and the guide post 7 is realized, the friction force and the guide function are reduced, and the lifting movement of the pressing plate 2 is smoother.

The top end of the adjusting screw 4 is provided with a grab handle 41, so that the adjusting screw 4 is manually rotated to adjust the distance between the top plate 1 and the pressing plate 2, and the operation is simple and convenient.

The top plate 1 is provided with an adjusting nut 40, and the rod part of the adjusting screw 4 is arranged on the adjusting nut 40 in a penetrating way and is in threaded connection with the adjusting nut 40, so that the rotation of the adjusting screw 4 can axially move relative to the top plate 1, and the pressing plate 2 is driven to perform lifting movement. Alternatively, a screw hole for the threaded connection of the adjusting screw 4 may be directly provided in the top plate 1.

The locking nuts 50 are disposed above and below the top plate 1, and the locking nuts 50 are in threaded connection with the adjusting screw 4. Through setting up locking nut 50, can be after adjusting screw 4 adjusts in place, twist locking nut 50 to and compress tightly roof 1, realize the locking to adjusting screw 4, when carrying out the inflation thickness detection or the inflation power detection of battery subsequently, adjusting screw 4 can not take place the drunkenness because of the reaction force that the inflation of battery produced, and the testing result is more accurate.

An installation seat 60 is arranged between the upper end face of the pressure sensor 5 and the lower end of the adjusting screw 4, so as to realize the installation of the pressure sensor 5 at the lower end of the adjusting screw 4.

Further, a plane bearing 70 is provided between the lower end of the adjusting screw 4 and the mounting base 60, so as to adapt to the mounting tolerance of the pressure sensor 5 for fine adjustment.

The working principle of the utility model is as follows:

the pressure sensor 5 is driven by the adjusting screw 4, and the pressure sensor 5 drives the pressing plate 2 to perform lifting motion through the connecting component 6, so that the pressing plate 2 can downwards press the battery to be tested placed on the bottom plate 3. The connecting component 6 can be one of an elastic structure and a rigid structure, and the detection work comprises a pressure sensor 5 for detecting the externally applied pressure (namely expansion force) when the battery to be detected expands, and a displacement detection mechanism (a displacement sensor 8 and a displacement top block 9) for detecting the height change of the pressing plate 2 (namely the thickness change when the battery to be detected expands), so that the thickness change of the battery to be detected or the battery core can be detected under the condition of ensuring constant pressure (the connecting component 6 is an elastic structure and the value of the pressure sensor 5 is unchanged), or the expansion force of the battery to be detected under the condition of ensuring constant gap (the connecting component 6 is a rigid structure and the value of the displacement sensor 8 is unchanged), and the interference of other factors on the detection result is eliminated when the detection is performed, and the detection precision is higher.

Through the scheme, the connecting component 6 is detachably connected between the pressure sensor 5 and the pressing plate 2, the connecting component 6 is taken as a whole, and the assembling and disassembling are more convenient, so that the mode of detection can be replaced quickly according to the actual detection requirement of the detection tool, the expansion thickness detection of the battery can be performed when the connecting component 6 is of an elastic structure, the expansion force detection of the battery can be performed when the connecting component 6 is of a rigid structure, and the force sensor and the displacement detection mechanism can work simultaneously under the two detection modes to detect the expansion thickness of the battery under the constant pressure state or detect the expansion force of the battery under the constant gap state, the interference of other factors on the detection result can be eliminated, and the accuracy of the detection result is higher.

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 (10)

1. Battery inflation detection frock of switchable mode, its characterized in that:

the device comprises a top plate, a pressing plate and a bottom plate which are sequentially arranged in parallel from top to bottom, an adjusting screw, a pressure sensor, a connecting component and a displacement detection mechanism;

a plurality of guide posts are arranged between the top plate and the bottom plate;

the pressing plate is matched with the guide post in a sliding way so as to realize lifting movement;

the adjusting screw is perpendicular to the top plate and penetrates through the top plate in a threaded connection mode;

the pressure sensor is fixedly connected to the lower end of the adjusting screw rod;

the connecting component comprises an elastic structure and a rigid structure which can be replaced with each other, and the upper end and the lower end of the connecting component are respectively and detachably connected with the pressure sensor and the pressing plate;

the displacement detection mechanism is used for detecting the displacement of the pressing plate.

2. The switchable mode battery expansion detection tool of claim 1, wherein:

when the connecting component is of an elastic structure, the connecting component comprises a first mounting plate, a second mounting plate, a plurality of telescopic sleeves and springs, wherein the first mounting plate and the second mounting plate are arranged in parallel up and down; the upper end and the lower end of the telescopic tube are respectively and fixedly connected with the first mounting plate and the second mounting plate; the spring is sleeved on the telescopic sleeve, and the upper end and the lower end of the spring are respectively abutted against the first mounting plate and the second mounting plate.

3. The switchable mode battery expansion detection tool of claim 1, wherein:

when the connecting component is of a rigid structure, the connecting component comprises a first mounting plate, a second mounting plate and a connecting column, wherein the first mounting plate and the second mounting plate are arranged in parallel up and down; the upper end and the lower end of the connecting column are respectively and fixedly connected with the first mounting plate and the second mounting plate.

4. The switchable mode battery expansion detection tool of claim 1, wherein:

the upper surface of the pressing plate is provided with a positioning groove for positioning the connecting assembly during installation.

5. The switchable mode battery expansion detection tool of claim 1, wherein:

the displacement detection mechanism comprises a displacement sensor and a displacement top block; the displacement sensor is arranged on the side edge of the pressure sensor, and the displacement jacking block is arranged on the upper surface of the pressing plate and is positioned right below the displacement sensor; the displacement sensor is used for detecting the displacement of the displacement top block.

6. The switchable mode battery expansion detection tool of claim 5, wherein:

the displacement detection mechanism comprises a stay wire sensor and a stay wire terminal; the stay wire sensor is arranged on the lower surface of the top plate, and the stay wire terminal is arranged on the upper surface of the pressing plate and is positioned right below the stay wire sensor; the stay wire sensor is used for detecting the displacement of the stay wire terminal.

7. The switchable mode battery expansion detection tool of claim 1, wherein:

four guide posts are arranged and are respectively arranged at four corners of the bottom plate; the adjusting screw rods are arranged at the center positions of the four guide posts; the pressing plate is provided with a guide sleeve, and the guide sleeve is sleeved on the guide post.

8. The switchable mode battery expansion detection tool of claim 1, wherein:

and locking nuts are arranged on the upper and lower sides of the top plate and are in threaded connection with the adjusting screw.

9. The switchable mode battery expansion detection tool of claim 1, wherein:

and a mounting seat is arranged between the upper end face of the pressure sensor and the lower end of the adjusting screw.

10. The switchable mode battery expansion detection tool of claim 9, wherein:

and a plane bearing is arranged between the lower end of the adjusting screw and the mounting seat.