CN220603521U - Tool for thermal runaway test of battery - Google Patents

Abstract

The utility model provides a tool for a battery thermal runaway test, which comprises a bottom plate, a baffle plate arranged on one side of the bottom plate, a pre-tightening plate arranged on the other side of the bottom plate, a driving mechanism capable of driving the pre-tightening plate to move close to or far away from the baffle plate, and a temperature sensing detection mechanism, wherein the baffle plate is arranged on one side of the bottom plate; a containing space for placing a battery is formed between the pressing plate and the baffle plate on the pre-tightening plate, and the temperature sensing detection mechanism is arranged above the battery in a crossing way and both ends of the temperature sensing detection mechanism are adjustably arranged on the bottom plate; the baffle is provided with the acupuncture hole, the temperature sensing detection mechanism is provided with the temperature sensor and is positioned at the top of the battery, and the battery is conveniently assembled by adopting the mode of compacting the battery through the screw rod structure, so that the battery can be fixed more firmly and is not easy to deviate, the length of the module can be adjusted randomly, a side plate is not arranged, the influence of the side plate caused by heat conduction can be avoided, and the accuracy of a thermal runaway test is improved.

Description

Tool for thermal runaway test of battery

Technical Field

The utility model relates to the technical field of equipment detection, in particular to a tool for a battery thermal runaway test.

Background

When the secondary batteries are used in groups, the secondary batteries are easily damaged due to the fact that improper extrusion force is applied to package, thermal runaway occurs, and the secondary batteries expand to enable the secondary batteries to be subjected to certain extrusion force so as to increase damage.

Most devices currently on the market that apply pressure to batteries can only perform planar extrusion, and cannot perform another test of mechanical abuse in an extrusion environment. In the conventional thermal runaway test fixture, a battery is placed between two metal plates, as shown in fig. 10, a first metal plate 001 and a second metal plate 002 are fixed by a fixing bolt 003; or directly modifying the end plate opening by using a module to perform a thermal runaway test, the existing design scheme has the following defects:

1. the fixture is unstable through the metal plate fixture bolt, and is easy to deviate;

2. the module is changed into a thermal runaway side plate heat conduction influence test result.

In view of the above drawbacks of the prior art, it is desirable to design a new tooling to meet the requirements of thermal runaway tests of batteries.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a tool for a thermal runaway test of a battery.

The tool for the battery thermal runaway test comprises a bottom plate, a baffle plate arranged on one side of the bottom plate, a pre-tightening plate arranged on the other side of the bottom plate, a driving mechanism capable of driving the pre-tightening plate to move close to or away from the baffle plate, and a temperature sensing detection mechanism;

the end part of the pre-tightening plate is provided with a pressing plate, an accommodating space is formed between the pressing plate and the baffle plate, the accommodating space is used for accommodating a battery, and the temperature sensing detection mechanism is arranged above the battery in a crossing way, and both ends of the temperature sensing detection mechanism are adjustably arranged on the bottom plate;

the battery temperature sensor is characterized in that a needling hole is formed in the baffle, a temperature sensor is arranged on the temperature sensing detection mechanism and is located at the top of the battery, when the driving mechanism drives the pressing plate to move towards the baffle and tightly press the battery, the needling hole is used for needling the battery to simulate out of control of the battery and detect the temperature of the battery through the temperature sensor, and a pressure sensor is arranged on one side, facing the battery, of the pressing plate.

Preferably, the driving mechanism is a screw mechanism, the screw mechanism comprises a screw rod, ball nuts sleeved on the screw rod, and a first supporting seat and a second supporting seat which are respectively arranged on two sides of the ball nuts and are sleeved on the screw rod, the pre-tightening plate further comprises a connecting rod vertically arranged on one side of the pressing plate, and when external force drives the screw rod to rotate, the ball nuts can be driven to move along the axial direction of the screw rod, and then the pressing plate is driven to move close to or far away from the baffle through the connecting rod.

Preferably, the device further comprises a linear guide rail and a connecting plate, wherein the linear guide rail comprises a guide rail body arranged on the bottom plate and a sliding block matched with the guide rail body;

the guide rail body is arranged in parallel with the connecting rod, one end of the connecting plate is arranged between the connecting rod and the ball nut and is in fastening connection with the connecting rod and the ball nut, the other end of the connecting plate is connected with the sliding block, and when the ball nut moves along the axial direction of the screw rod, the connecting plate drives the connecting rod to drive the pressing plate to move close to or far away from the baffle plate, and at the moment, the sliding block slides on the guide rail body.

Preferably, the rotation of the screw is driven by a motor or manually.

Preferably, the temperature sensing detection mechanism is of a door-shaped structure.

Preferably, the temperature sensing detection mechanism comprises a cross beam and two sleeves positioned at the lower sides of two ends of the cross beam, the bottom ends of the two sleeves are detachably fixed on the bottom plate, two ends of the cross beam downwards extend to form a supporting vertical beam, the lower end of the supporting vertical beam is sleeved inside the sleeve and can be adjusted at a fixed position in the height direction of the sleeve so as to adjust the height of the cross beam, and the temperature sensor is arranged on the cross beam.

Preferably, an extension column is further arranged below the middle part of the cross beam through a second supporting plate, the extension column is used for installing a functional sheet, and the distance between the functional sheet and an explosion-proof valve on the battery is 2-5 mm.

Preferably, the second support plate is provided with a functional hole, and the temperature sensor can detect the temperature of the battery at the time of thermal runaway through the functional hole.

Preferably, the two sides of the bottom end of the sleeve pipe extend out of the first supporting plate respectively and the first supporting plates are fixed by the detachable pressing plate strips fixed on the bottom plate respectively, the pressing plate strips are parallel to the moving direction of the pressing plate, and the position of the first supporting plates pressed by the pressing plate strips can be adjusted according to the battery to be detected.

Preferably, the cross section of the baffle is L-shaped and the side surface of the baffle is provided with reinforcing ribs.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model adopts the screw structure to compress the batteries, is convenient for the module group, can ensure that the batteries are fixed more firmly and are not easy to deviate, can randomly adjust the length of the module group, has no side plate, can avoid the influence of the side plate caused by heat conduction, and improves the accuracy of thermal runaway test.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic structural view of a screw mechanism;

FIG. 3 is a schematic view of a linear guide;

FIG. 4 is a schematic structural view of a connection plate;

FIG. 5 is a schematic structural view of a pretensioning plate;

FIG. 6 is a schematic diagram of a temperature sensing mechanism when viewed from above;

FIG. 7 is a schematic view of the structure of the cross beam;

FIG. 8 is a schematic view of the structure of the temperature sensing mechanism when viewed from the side below;

FIG. 9 is a schematic view of a baffle plate;

fig. 10 is a schematic structural diagram of a thermal runaway tooling in the prior art.

The figure shows:

first metal plate 001

Second metal plate 002

Fixing bolt 003

Screw mechanism 1

Screw 11

Ball nut 12

First supporting seat 13

Second supporting seat 14

Linear guide rail 2

Guide rail body 21

Slider 22

Connecting plate 3

First connection surface 31

Second connection surface 32

Third connection surface 33

Pretensioning plate 4

Connecting rod hole 41

Connecting rod 42

Platen 43

Temperature sensing detection mechanism 5

Cross beam 51

Supporting vertical beam 511

Sleeve 52

First connecting piece 521

First support plate 522

Second support plate 53

Function hole 531

Extension column 54

Third connector 541

Functional sheet 6

Baffle 7

Needled hole 71

Baffle through hole 72

Bottom plate 8

Battery 10

Platen strip 81

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

The utility model provides a tool for a battery thermal runaway test, which comprises a bottom plate 8, a baffle plate 7 arranged on one side of the bottom plate 8, a pre-tightening plate 4 arranged on the other side of the bottom plate 8, a driving mechanism capable of driving the pre-tightening plate 4 to move close to or far away from the baffle plate 7, and a temperature sensing detection mechanism 5, wherein a pressing plate 43 is arranged at the end part of the pre-tightening plate 4, a containing space is formed between the pressing plate 43 and the baffle plate 7, the containing space is used for containing a battery, the battery is preferably a battery 10 or a battery pack, the temperature sensing detection mechanism 5 is arranged above the battery in a straddling way and both ends of the battery are adjustably arranged on the bottom plate 8, a needling hole 71 is formed in the baffle plate 7, a temperature sensor is arranged on the temperature sensing detection mechanism 5 and is positioned at the top of the battery, and when the driving mechanism drives the pressing plate 43 to move towards the baffle plate 7 and the battery is pressed, the battery is simulated to be out of control through needling action by the needling hole 71 and the temperature of the battery is detected through the temperature sensor, and a pressure sensor is arranged on one side of the pressing plate 43 towards the battery, which is used for detecting the pressing force between the battery and the pressing plate 43.

In order to increase the strength of the baffle 7, the cross section of the baffle 7 is in an L-shaped structure, and the side surface of the baffle 7 is provided with reinforcing ribs, the bottom of the baffle 7 is provided with baffle through holes 72, and the baffle 7 can be fixed on the bottom plate 8 by adopting connectors such as screws through the baffle through holes 72.

As shown in fig. 2, the driving mechanism preferably adopts a screw mechanism 1, the screw mechanism 1 comprises a screw 11, ball nuts 12 sleeved on the screw 11, a first supporting seat 13 and a second supporting seat 14 respectively arranged at two sides of the ball nuts 12 and sleeved on the screw 11, bearings are respectively arranged in the first supporting seat 13 and the second supporting seat 14, the screw 11 is respectively in running fit with the first supporting seat 13 and the second supporting seat 14 through the two bearings, the pre-tightening plate 4 further comprises a connecting rod 42 vertically arranged at one side of a pressing plate 43, and when the screw 11 is driven to rotate by external force, the ball nuts 12 can be driven to move along the axial direction of the screw 11, and then the pressing plate 43 is driven to move close to or far away from the baffle 7 through the connecting rod 42, as shown in fig. 5.

In practical applications, the screw 11 may be directly driven to rotate by a motor, or a rocker arm may be provided at the end of the screw 11 and driven by manual rotation of the rocker arm.

The utility model is also provided with the linear guide rail 2 and the connecting plate 3, as shown in fig. 1, 3 and 4, the linear guide rail 2 comprises a guide rail body 21 arranged on the bottom plate 8 and a sliding block 22 matched with the guide rail body 21, the guide rail body 21 is arranged in parallel with the connecting rod 42, the connecting plate 3 comprises a first connecting surface 31 at the upper part of one side, a third connecting surface 33 at the lower part and a second connecting surface 32 at the lower part of the other side, one end of the connecting plate 3 is arranged between the connecting rod 42 and the ball nut 12 and is tightly connected with the connecting rod 42 and the ball nut 12, in particular, the connecting rod 42 is provided with a connecting rod hole 41, the connecting rod hole 41 is matched with the connecting piece to connect the first connecting surface 31, the third connecting surface 33 of the connecting plate 3 is connected with the ball nut 12, the second connecting surface 32 at the lower part of the other end of the connecting plate 3 is tightly connected with the sliding block 22, when the ball nut 12 moves along the axial direction of the screw 11, the connecting plate 42 drives the pressing plate 43 to move close to or far away from the baffle 7 through the connecting plate 3, at the moment, the sliding block 22 slides on the guide rail body 21, and the structure of the sliding block 22 matched with the guide rail body 21 reduces radial shake 12 in the process of the ball nut 12, so that the precision of the tool is greatly improved.

As shown in fig. 1, 6, 7, and 8, the temperature sensing and detecting mechanism 5 is preferably a gate-shaped structure. Specifically, the temperature sensing detecting mechanism 5 includes a cross beam 51 and two sleeves 52 located at lower sides of two ends of the cross beam 51, bottom ends of the two sleeves 52 are detachably fixed on the bottom plate 8, two ends of the cross beam 51 extend downwards to form a supporting vertical beam 511, a lower end of the supporting vertical beam 511 is sleeved inside the sleeve 52 and can adjust a fixing position in a height direction of the sleeve 52 so as to adjust the height of the cross beam 51, in practical application, a through hole is formed in a side surface of the sleeve 52, the supporting vertical beam 511 can be fixed inside the sleeve 52 by penetrating through a first connecting piece 521, and the first connecting piece 521 can be a single-head screw, wherein a temperature sensor is arranged on the cross beam 51 and is used for detecting a temperature when a battery is out of control.

Further, an extension column 54 is further disposed below the middle portion of the beam 51 through the second support plate 53, preferably, a beam through hole is disposed in the middle portion of the beam 51, a functional hole 531 is disposed on the second support plate 53, the functional hole 531 is preferably a kidney-shaped through hole, the second support plate 53 can be fixed in the middle portion of the beam 51 through the beam through hole and the functional hole 531 by a second connecting piece, the extension column 54 can be fixed below the second support plate 53 through the third connecting piece 541 and the functional hole 531, the bottom of the extension column 54 is used for installing the functional sheet 6, an extension column hole 541 is disposed at the bottom of the extension column 54, the functional sheet 6 is installed through the extension column hole 541, and the distance between the functional sheet 6 and an explosion-proof valve on the battery is 2-5 mm, which can be used for simulating a valve opening space in thermal runaway. In practical application, the temperature at which the battery is thermally out of control can be detected by introducing a temperature sensing wire through the functional hole 531 on the second support plate 53.

As shown in fig. 1 and 8, the first support plates 522 extend from both sides of the bottom end of the sleeve 52, and the first support plates 522 are fixed by the pressing plate bars 81 detachably fixed to the bottom plate 8, respectively, the pressing plate bars 81 are parallel to the moving direction of the pressing plate 43, and the position of the first support plates 522 pressed by the pressing plate bars 81 can be adjusted according to the battery to be detected.

The operating principle of the utility model is as follows:

the battery 10 or the battery pack to be detected is arranged on the bottom plate 8, the lead screw mechanism 1 on the left side is driven to drive the pre-tightening plate 4 to press the battery 10 or the battery pack on the baffle plate 7, the needling mechanism penetrates through the needling holes 71 on the baffle plate 7 to perform needling action on the battery 10 or the battery pack, the thermal runaway of the battery 10 is triggered, and the temperature sensor on the temperature sensing detection tool 5 monitors the temperature of the battery 10.

A certain length of space is reserved between the pre-tightening plate 4 and the baffle plate 7, a plurality of batteries 10 can be placed in the space, a pressure sensor can be added between the batteries 10 and the pre-tightening plate 4, and the distance between the pre-tightening plate 4 and the baffle plate 7 is controlled by rotating the screw mechanism 1 to compress the batteries 10; the extending column holes 541 on the extending column 54 are internal threaded holes, and can be added with functional sheets 6 made of different materials such as steel sheets, aluminum sheets or PCs, FPCs and the like, and are 2-5 mm away from the explosion-proof valve to simulate the valve opening space in thermal runaway, meanwhile, the temperature sensor is preferably a non-contact temperature sensor, for example, an infrared temperature sensor is adopted, and a temperature sensing line of the temperature sensor can penetrate through the functional holes 531 on the second supporting plate 53 arranged at the bottom of the cross beam 51 so as to realize the effect of detecting the temperature in the thermal runaway of the battery 10; after the battery 10 is fixed, needling is performed through the needling holes 71 on the baffle 7, triggering the thermal runaway of the battery.

The bottom of the battery 10 can be suspended, and the number and thickness of the battery 10 can be changed at will by adjusting the front-back distance of the pre-tightening plate 4; the convenience of pressure sensor and temperature sensing detection is increased, and the difference of the temperature and expansion force of the battery thermal runaway caused by the simulated valve opening space and the materials of different valve opening spaces is also increased.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. The tool for the battery thermal runaway test is characterized by comprising a bottom plate (8), a baffle plate (7) arranged on one side of the bottom plate (8), a pre-tightening plate (4) arranged on the other side of the bottom plate (8), a driving mechanism capable of driving the pre-tightening plate (4) to move close to or away from the baffle plate (7) and a temperature sensing detection mechanism (5);

the end part of the pre-tightening plate (4) is provided with a pressing plate (43), a containing space is formed between the pressing plate (43) and the baffle plate (7), the containing space is used for containing a battery, and the temperature sensing detection mechanism (5) is arranged above the battery in a straddling way, and both ends of the temperature sensing detection mechanism are adjustably arranged on the bottom plate (8);

the battery temperature sensor is characterized in that a needling hole (71) is formed in the baffle (7), a temperature sensor is arranged on the temperature sensing detection mechanism (5) and located at the top of the battery, when the driving mechanism drives the pressing plate (43) to move towards the baffle (7) and tightly press the battery, the needling hole (71) is used for needling the battery to simulate the battery to be out of control and the temperature of the battery is detected through the temperature sensor, and a pressure sensor is arranged on one side of the pressing plate (43) towards the battery.

2. The tool for thermal runaway testing of batteries according to claim 1, wherein the driving mechanism is a screw mechanism (1), the screw mechanism (1) comprises a screw (11), ball nuts (12) sleeved on the screw (11), first supporting seats (13) and second supporting seats (14) respectively arranged on two sides of the ball nuts (12) and sleeved on the screw (11), the pre-tightening plate (4) further comprises a connecting rod (42) vertically arranged on one side of the pressing plate (43), and when the screw (11) is driven to rotate by external force, the ball nuts (12) can be driven to move along the axial direction of the screw (11) so as to drive the pressing plate (43) to move close to or far away from the baffle (7) through the connecting rod (42).

3. Tool for thermal runaway testing of batteries according to claim 2, characterized in that it further comprises a linear guide (2) and a connecting plate (3), said linear guide (2) comprising a guide body (21) provided on said bottom plate (8) and a slider (22) matching said guide body (21);

the guide rail body (21) with connecting rod (42) parallel arrangement, the one end setting of connecting plate (3) be in between connecting rod (42) and ball nut (12) and with connecting rod (42) and ball nut (12) fastening connection, the other end of connecting plate (3) is connected slider (22), when ball nut (12) are along the axial motion of screw rod (11), drive connecting rod (42) drive clamp plate (43) be close to or keep away from baffle (7) motion through connecting plate (3), at this moment, slider (22) slide on guide rail body (21).

4. Tool for thermal runaway testing of batteries according to claim 2, characterized in that the rotation of the screw (11) is driven by a motor or manually.

5. The tool for thermal runaway testing of batteries according to claim 1, wherein the temperature sensing detection mechanism (5) is of a door-shaped structure.

6. The tool for thermal runaway testing of batteries according to claim 1, wherein the temperature sensing detection mechanism (5) comprises a cross beam (51) and two sleeves (52) positioned at the lower sides of two ends of the cross beam (51), the bottom ends of the two sleeves (52) are detachably fixed on the bottom plate (8), two ends of the cross beam (51) downwards extend to form a supporting vertical beam (511), the lower end of the supporting vertical beam (511) is sleeved in the sleeve (52) and can be adjusted to a fixed position in the height direction of the sleeve (52) so as to adjust the height of the cross beam (51), and the temperature sensor is arranged on the cross beam (51).

7. The tool for thermal runaway testing of batteries according to claim 6, wherein an extension column (54) is further arranged below the middle part of the cross beam (51) through a second supporting plate (53), the extension column (54) is used for installing a functional sheet (6), and the distance between the functional sheet (6) and an explosion-proof valve on a battery is 2-5 mm.

8. The tool for thermal runaway testing of batteries according to claim 7, wherein the second support plate (53) is provided with functional holes (531), and the temperature sensor is capable of detecting the temperature of the battery at thermal runaway through the functional holes (531).

9. The tool for thermal runaway testing of batteries according to claim 6, wherein a first support plate (522) extends from both sides of the bottom end of the sleeve (52) and the first support plate (522) is fixed by a detachable pressure plate strip (81) fixed on the bottom plate (8), the pressure plate strip (81) is parallel to the movement direction of the pressure plate (43), and the position of the first support plate (522) pressed by the pressure plate strip (81) can be adjusted according to the battery to be detected.

10. Tool for thermal runaway test of batteries according to claim 1, characterized in that the baffle (7) has an L-shaped cross section and is provided with reinforcing ribs on the sides.