CN216410433U

CN216410433U - Detection mechanism and detection system

Info

Publication number: CN216410433U
Application number: CN202122739284.4U
Authority: CN
Inventors: 廖永杰; 孙俊华; 史栋梁; 黄永耀; 廖钦林; 刘玉红
Original assignee: Guangdong Fenghua New Energy Co ltd
Current assignee: Guangdong Fenghua New Energy Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-04-29
Anticipated expiration: 2031-11-09

Abstract

The utility model relates to the technical field of battery cell production, in particular to a detection mechanism and a detection system. The lifting assembly is arranged on the supporting assembly, the thermosensitive element is arranged on the lifting assembly, the detection mechanism is placed into the test oven before temperature storage test, the lifting assembly is driven, and when the thermosensitive element is driven by the lifting assembly to be lowered, the thermosensitive element and the battery cell can be subjected to temperature storage test when being pressed and connected, the operation process is very simple and convenient, and in the test process, the thermosensitive element is always limited by the lifting assembly so as to ensure that the thermosensitive element cannot deviate from the original temperature measurement position in the test process, so that the thermosensitive element can detect accurate temperature information.

Description

Detection mechanism and detection system

Technical Field

The utility model relates to the field of battery cell production, in particular to a detection mechanism and a detection system.

Background

In order to ensure the safety of the battery core, when the battery core is produced, the temperature storage test needs to be carried out on the battery core, the existing test mode usually uses hot melt adhesive to fix the thermosensitive element on the surface of the battery core, and then the battery core is put into a test oven to detect the surface temperature of the battery core by using the thermosensitive element.

Because in the test process, the temperature of the battery core can rise, the bonding force of the hot melt adhesive is reduced, the thermosensitive element is deviated from the original temperature measuring position, and even the thermosensitive element is directly separated from the surface of the battery core, and finally the temperature detected by the thermosensitive element is inaccurate.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the embodiments of the present invention is to provide a detection mechanism and a detection system, so as to solve the problem that in the prior art, during a test process, a temperature of a battery cell rises, so that an adhesive force of a hot melt adhesive decreases, and further, a thermosensitive element deviates from an original temperature measurement position, even directly separates from a surface of the battery cell, and finally, a temperature detected by the thermosensitive element is inaccurate.

In a first aspect, an embodiment of the present invention provides a detection mechanism, including: the supporting assembly comprises a supporting seat and a supporting frame, wherein the supporting seat is provided with a battery cell bearing area for bearing the battery cell, and the supporting frame is arranged on the supporting seat; the lifting component is arranged on the supporting frame; and the heat-sensitive element is connected with the lifting assembly and driven by the lifting assembly to be lifted to be spaced from the battery cell or be lowered to be in pressure joint with the battery cell.

Further, the heat-sensitive element is provided with two at least, the lift subassembly includes: a driving source mounted on the support frame; one surface of the pressing plate is connected with the driving source, and the other surface of the pressing plate is connected with at least two thermosensitive elements; the driving source is used for driving the pressing plate to lift so as to drive the thermosensitive element to lift.

Furthermore, the detection mechanism further comprises a lead wire assembly, the lead wire assembly comprises a lead wire seat, two sides of the lead wire seat are respectively connected with the pressing plate and the thermosensitive element, an accommodating cavity is formed in the lead wire seat, and the lead wire seat is provided with a wire inlet and a wire outlet which are communicated with the accommodating cavity.

Furthermore, the lead assembly further comprises a lead tube, one end of the lead tube is arranged at the wire outlet of the lead seat, and the other end of the lead tube is connected with the thermosensitive element.

Further, the support frame includes: the supporting rod is arranged on the supporting seat, the mounting plate is connected with the supporting rod and is arranged in a layered mode, the driving source is arranged on the mounting plate, a guide hole matched with the circumferential profile of the supporting rod is formed in the pressing plate, and the supporting rod penetrates through the guide hole.

Furthermore, a plurality of through holes are formed in the battery cell bearing area.

Further, still including set up in utmost point ear clamp on the supporting seat, utmost point ear clamp is the conductor, and it is used for pressing from both sides to establish the anodal ear and the negative pole ear department of electricity core to switch on anodal ear with the negative pole ear.

The pole lug clamp is connected with the pole lug clamp through a connecting rod, and the pole lug clamp is connected with the pole lug clamp through a connecting rod.

Furthermore, the supporting seat is provided with a containing groove adjacent to the electric core bearing area, and the groove wall of the containing groove is abutted to the pole lug clamp so as to limit the horizontal movement of the pole lug clamp.

In a second aspect, an embodiment of the present invention further provides a detection system, including a testing oven; a detection mechanism according to the first aspect, the detection mechanism being installed in the test oven; and the digital display mechanism is electrically connected with the thermosensitive element to display the temperature information detected by the thermosensitive element.

The embodiment of the utility model has the beneficial effects that: the lifting assembly is arranged on the supporting assembly, the thermosensitive element is arranged on the lifting assembly, the detection mechanism is placed into the test oven before temperature storage test, the lifting assembly is driven, and when the thermosensitive element is driven by the lifting assembly to be lowered, the thermosensitive element and the battery cell can be subjected to temperature storage test when being pressed and connected, the operation process is very simple and convenient, and in the test process, the thermosensitive element is always limited by the lifting assembly so as to ensure that the thermosensitive element cannot deviate from the original temperature measurement position in the test process, so that the thermosensitive element can detect accurate temperature information.

Drawings

The following detailed description of embodiments of the utility model will be made with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a part of a detecting mechanism provided in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a support base according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a platen according to an embodiment of the present invention;

FIG. 4 is a schematic view of a portion of FIG. 2 at position A;

fig. 5 is a schematic structural diagram of a cell;

the figures are numbered:

1. a support assembly; 11. a supporting seat; 111. a cell bearing area; 112. a through hole; 113. a containing groove; 12. a support frame; 121. a support bar; 122. mounting a plate; 2. a lifting assembly; 21. a drive source; 22. pressing a plate; 221. a guide hole; 3. a thermosensitive element; 4. a lead assembly; 41. a lead wire holder; 42. a lead tube; 5. a polar ear clip; 200. an electric core; 2001. a positive tab; 2002. and a negative tab.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The embodiment of the utility model provides a detection mechanism, as shown in fig. 1, the detection mechanism comprises a support component 1, a lifting component 2 and a heat-sensitive component. The support assembly 1 includes a support base 11 and a support frame 12, wherein the support base 11 is provided with a cell 200 carrying area 111 for carrying the cell 200, and the support frame 12 is installed on the support base 11. The lifting component 2 is arranged on the supporting frame 12. The heat-sensitive element 3 is connected with the lifting assembly 2, and the heat-sensitive element 3 is driven by the lifting assembly 2 to be lifted until the heat-sensitive element 3 is spaced from the battery cell 200 or to be lowered until the heat-sensitive element 3 is pressed with the battery cell 200.

The heat-sensitive element 3 may be a thermistor, a thermocouple or other heat-sensitive element 3, and the present invention is not limited thereto, and may be adapted by those skilled in the art.

By implementing the embodiment, before the temperature storage test, the detection mechanism provided by the utility model is placed in a test oven (not shown in the figure), the lifting assembly 2 is driven, and when the lifting assembly 2 drives the thermosensitive element 3 to be lowered, so that the thermosensitive element 3 is in pressure joint with the battery cell 200, the temperature storage test can be performed on the battery cell 200, the operation process is very simple and convenient, and in the test process, the thermosensitive element 3 is always limited by the driving assembly, so that the thermosensitive element 3 cannot deviate from the original temperature measurement position in the test process, and the thermosensitive element 3 can detect accurate temperature information.

In the embodiment, at least two thermosensitive elements 3 are provided, and the lifting assembly 2 includes a driving source 21 and a pressing plate 22. The driving source 21 is installed on the supporting frame 12, one surface of the pressing plate 22 is connected with the driving source 21, and the other surface is connected with at least two thermosensitive elements 3. The driving source 21 is used for driving the platen 22 to move up and down so as to drive the heat-sensitive element 3 to move up and down.

Specifically, in the present embodiment, at least two thermosensitive elements 3 are connected to the pressing plate 22, so that the detection mechanism of the present embodiment can perform the temperature storage test on at least two battery cells 200 at the same time.

In an exemplary embodiment, the support bracket 12 includes a support rod 121 and a mounting plate 122. The supporting rod 121 is installed on the supporting seat 11, the mounting plate 122 is connected with the supporting rod 121 and is layered with the supporting seat 11, the driving source 21 is installed on the mounting plate 122, the pressing plate 22 is provided with a guiding hole 221 matched with the circumferential profile of the supporting rod 121, and the supporting rod 121 penetrates through the guiding hole 221.

Specifically, when the guide hole 221 is not provided, the thermosensitive element 3 is likely to shake during the lifting process, so that the position where the thermosensitive element 3 abuts against the battery cell 200 is deviated from the expected temperature measurement position, and further, an error occurs in the temperature information detected by the thermosensitive element 3. Through implementing this embodiment, set up the guiding hole 221 with the global profile looks adaptation of bracing piece 121 on the clamp plate 22, the bracing piece 121 wears to locate guiding hole 221, therefore when the lift subassembly 2 drives the clamp plate 22 and removes, guiding hole 221 and bracing piece 121 just can cooperate the effect of playing the direction mutually, consequently heat-sensitive element 3 can not produce easily when going up and down and rock, and stability is preferred, has improved the accuracy of the temperature information that heat-sensitive element 3 detected.

In an embodiment, the cell 200 has a plurality of through holes 112 formed in the carrying region 111.

Specifically, after the temperature storage test is finished, the battery cell 200 needs to be cooled first, and then the next process can be performed, and the previous detection mechanism cannot accelerate the cooling of the battery cell 200, so that the cooling speed of the battery cell 200 is very low, and the efficiency is affected. The plurality of through holes 112 provided in the present embodiment can increase the contact area between the battery cell 200 and air, and accelerate the heat dissipation of the battery cell 200. In addition, if the battery cell 200 bearing area 111 is smooth, the battery cell 200 is easily displaced on a smooth ground surface, in this embodiment, the through hole 112 is disposed in the battery cell 200 bearing area 111, and the through hole 112 can increase the friction force between the battery cell 200 and the supporting seat, thereby avoiding the displacement of the battery cell 200 and eliminating the test error caused by the displacement of the battery cell 200.

In an embodiment, the detecting mechanism further includes a lead assembly 4, the lead assembly 4 includes a lead seat 41, two sides of the lead seat 41 are respectively connected to the other side of the pressing plate 22 and the thermal sensitive element 3, a receiving cavity (not shown) is formed inside the lead seat 41, and the lead seat 41 is provided with a wire inlet (not shown) and a wire outlet (not shown) which are communicated with the receiving cavity.

Specifically, when the detection mechanism of the present embodiment is used, an external digital display mechanism is required, and since the digital display mechanism and the thermosensitive element 3 need to be connected through a wire. The length of the wire is not well controlled and therefore a longer wire is usually provided. In order to arrange and hide the wire of unnecessary length, the detection mechanism of this embodiment has set up lead wire subassembly 4, and lead wire subassembly 4 specifically includes lead wire seat 41, and the both sides of lead wire seat 41 are connected with clamp plate 22 opposite side and heat-sensitive element 3 respectively, and consequently lifting unit 2 can be through driving clamp plate 22 to drive lead wire seat 41, and then drive heat-sensitive element 3 and go up and down. The inside holding chamber that is equipped with of the wire holder 41 of this embodiment to accomodate partial wire, thereby play the arrangement and hide the effect of wire, wire holder 41 is equipped with the inlet wire and the outlet that communicate with the holding chamber, makes the wire can pass wire holder 41 and is connected with thermal element 3.

In an embodiment, in order to further arrange the wires, the lead assembly 4 further includes a lead tube 42, one end of the lead tube 42 is mounted at the wire outlet of the lead holder 41, the other end is connected to the heat-sensitive element 3, and the wires pass through the lead tube 42 and are connected to the heat-sensitive element 3.

In an embodiment, the detection mechanism further includes a tab clamp 5 disposed on the support base, where the tab clamp 5 is a conductor and is configured to be clamped between the positive tab 2001 and the negative tab 2002 of the battery cell 200 to connect the positive tab 2001 and the negative tab 2002.

By implementing the embodiment, the tab clip 5 can connect the positive tab 2001 and the negative tab 2002, so the detection mechanism of the embodiment is not only suitable for temperature storage tests, but also suitable for high-temperature external short-circuit tests and normal-temperature external short-circuit tests.

Specifically, the external short circuit test can verify the safety performance of the battery cell 200, and the positive and negative electrode tabs are directly connected by the conductor, so that the battery cell 200 is short-circuited, thereby causing thermal runaway, and if the battery cell 200 is subjected to fire and explosion within the time period or the temperature is too high, the safety performance is not qualified.

In an embodiment, the supporting base 11 is provided with a receiving groove 113 adjacent to the battery cell 200 bearing region 111, and a groove wall (not shown) of the receiving groove 113 abuts against the tab clamp 5 to limit the tab clamp 5 from moving horizontally.

Specifically, the groove wall of the accommodating groove 113 abuts against the tab clamp 5 to limit the horizontal movement of the tab clamp 5, so that when the tab clamp 5 clamps the tab, the position of the battery cell 200 is fixed and does not deviate, that is, the tab clamp 5 can preliminarily determine the battery cell 200, and further eliminate the test error caused by the deviation of the battery cell 200.

In one embodiment, the detection mechanism further comprises a switching element connected to the tab clamp 5, the switching element being configured to control the tab clamp 5 to be turned on and off.

Specifically, when the external short circuit test is not required, the circuit may be disconnected using the switching element. When an external short circuit test is required, the switching element is used for conducting the circuit.

The lifting assembly 2 of the embodiment of the utility model can use an air cylinder or an electric cylinder, and the skilled person can adjust the air cylinder or the electric cylinder adaptively. The air cylinder is convenient to install, simple to operate and low in cost, and can adapt to a plurality of severe using environments. The electric cylinder is fast in speed, stable in movement and low in noise, and transmission displacement can be accurately controlled through the control system.

The embodiment of the utility model shows a detection mechanism, a lifting component 2 is arranged on a supporting component 1, a thermosensitive element 3 is arranged on the lifting component 2, the detection mechanism is placed into a test oven before temperature storage test, the lifting component 2 is driven, and when the lifting component 2 drives the thermosensitive element 3 to be lowered, the temperature storage test can be carried out on a battery cell 200 when the thermosensitive element 3 is in compression joint with the battery cell 200, the operation process is very simple, and in the test process, the thermosensitive element 3 is always limited by the driving component, so that the thermosensitive element 3 cannot deviate from the original temperature measurement position in the test process, and the thermosensitive element 3 can detect accurate temperature information.

The utility model also provides a detection system, as shown in fig. 1, the detection system comprises a testing oven, a detection mechanism and a digital display mechanism (not shown in the figure). The detection mechanism is the detection mechanism of the above embodiment, the detection mechanism is installed in the testing oven, and the digital display mechanism is electrically connected with the thermosensitive element 3 to display the temperature information detected by the thermosensitive element 3.

Through implementing this embodiment, in the testing process, thermal element 3 can receive the restriction of drive assembly all the time to guarantee that thermal element 3 can not squint former temperature measurement position in the testing process, so thermal element 3 can detect accurate temperature information.

In a specific embodiment, the testing oven is provided with a threading hole for the threading of a wire.

In the past, when the temperature storage test is carried out, because the lead is connected with the thermosensitive element 3 in the test oven and the digital display device outside the test oven, the door of the test oven needs to be opened a little for the lead to come in and go out, therefore, the temperature in the test oven can be influenced by the external environment temperature, and the temperature measurement accuracy is reduced. This embodiment has set up the through wires hole, when carrying out the temperature storage test, the door of test oven need not to be opened, can improve the temperature measurement accuracy.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. The utility model provides a detection mechanism for detect electric core, its characterized in that includes:

the supporting assembly comprises a supporting seat and a supporting frame, wherein the supporting seat is provided with a battery cell bearing area for bearing the battery cell, and the supporting frame is arranged on the supporting seat;

the lifting component is arranged on the supporting frame;

and the heat-sensitive element is connected with the lifting assembly and driven by the lifting assembly to be lifted to be spaced from the battery cell or be lowered to be in pressure joint with the battery cell.

2. The sensing mechanism of claim 1, wherein there are at least two of the thermal elements, and wherein the lifting assembly comprises:

a driving source mounted on the support frame;

one surface of the pressing plate is connected with the driving source, and the other surface of the pressing plate is connected with at least two thermosensitive elements;

the driving source is used for driving the pressing plate to lift so as to drive the thermosensitive element to lift.

3. The detection mechanism of claim 2, wherein: the detection mechanism further comprises a lead wire assembly, the lead wire assembly comprises a lead wire seat, two sides of the lead wire seat are respectively connected with the pressing plate and the thermosensitive element, an accommodating cavity is formed in the lead wire seat, and the lead wire seat is provided with a wire inlet and a wire outlet which are communicated with the accommodating cavity.

4. The detection mechanism of claim 3, wherein: the lead wire assembly further comprises a lead wire tube, one end of the lead wire tube is arranged at the wire outlet of the lead wire seat, and the other end of the lead wire tube is connected with the thermosensitive element.

5. The detection mechanism of claim 2, wherein the support frame comprises: the supporting rod is arranged on the supporting seat, the mounting plate is connected with the supporting rod and is arranged in a layered mode, the driving source is arranged on the mounting plate, a guide hole matched with the circumferential profile of the supporting rod is formed in the pressing plate, and the supporting rod penetrates through the guide hole.

6. The detection mechanism of claim 2, wherein: and the battery cell bearing area is provided with a plurality of through holes.

7. The detection mechanism according to any one of claims 1 to 6, wherein: still including set up in utmost point ear clamp on the supporting seat, utmost point ear clamp is the conductor, and it is used for pressing from both sides to establish the anodal ear and the negative pole ear department of electric core are in order to switch on anodal ear with the negative pole ear.

8. The detection mechanism of claim 7, wherein: the pole lug clamp is connected with the pole lug clamp through the switch element, and the switch element is used for controlling the pole lug clamp to be connected and disconnected.

9. The detection mechanism of claim 7, wherein: the supporting seat is provided with a containing groove adjacent to the electric core bearing area, and the groove wall of the containing groove is abutted to the lug clamp so as to limit the horizontal movement of the lug clamp.

10. A detection system, comprising:

testing the oven;

a detection mechanism according to any one of claims 1 to 9, wherein the detection mechanism is installed in the test oven;

and the digital display mechanism is electrically connected with the thermosensitive element to display the temperature information detected by the thermosensitive element.