Device for testing expansion deformation resistance of battery system

Abstract

The utility model belongs to the technical field of power battery testing, and particularly relates to a device for testing expansion deformation resistance of a battery system. Comprising a bottom plate, a driving assembly is arranged in the middle of the upper portion of the bottom plate, driven assemblies are located on the bottom plate and symmetrically arranged along the driving assembly, each driven assembly comprises a driven bevel gear, a telescopic unit and a guide unit, the other end of the telescopic unit is connected with the battery cell simulation block, and the driving assembly provides power and drives the driven assembly to drive the battery cell simulation block to generate synchronous and reverse linear movement actions in the horizontal direction under the action of the guide unit; the battery cell simulation blocks are connected with the two sides of the inner wall of the shell of the battery system sample respectively, the active assembly drives the battery cell simulation blocks to apply extrusion force to deformation of the inner wall of the shell of the battery system sample, and the expansion deformation resistance test of the battery system sample is completed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power battery test technical field, especially relates to a kind of battery system anti-expansion deformation testing device. BACKGROUND

[0002] With the popularity of electric vehicles, people pay more and more attention to the safety of electric vehicles;Power battery is the core component of electric vehicle, power battery will expand and deform in use, the expansion force generated by battery expansion will cause the damage of module end side plate structure and / or CTP battery pack box body, even cause the risk of fire failure, CTP battery pack box body is Cell To PACK (battery-battery pack), which integrates battery directly into battery pack, thereby saving the intermediate module architecture, simplifying the structure of PACK (battery pack), improving space utilization, therefore, it is crucial to test the anti-expansion deformation of module end side plate structure and / or CTP battery pack box body structure during the production and processing of power battery pack.

[0003] At present, finite element simulation analysis means and / or tension machine are usually used to analyze and test the end side plate structure and box body structure, and specific tooling needs to be processed according to different structures for tension machine test, and finite element analysis means cannot completely replace experiment. How to conveniently and reliably test the anti-expansion deformation of module end side plate structure and CTP battery pack box body is a problem to be solved. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model provides a kind of battery system anti-expansion deformation testing device, including the bottom plate of horizontal arrangement, the main component is equipped in the middle part of bottom plate upper side, driven component is arranged along main component symmetry on the bottom plate, and driven component includes driven bevel gear, telescopic unit and guide unit, wherein,

[0005] The driving bevel gear of the output end of the main component is engaged with the driven bevel gear, one end of the driven bevel gear is connected with the telescopic unit, the other end of the telescopic unit is connected with the battery cell simulation block, the main component provides power to drive the driven component to drive the corresponding battery cell simulation block to produce synchronous reverse linear motion under the action of the guide unit along the horizontal direction;

[0006] The battery cell simulation block is connected with the inner wall of the shell of the battery system sample on both sides, and is synchronously retracted or synchronously extended outward by the battery cell simulation block.

[0007] Preferably, the main component includes a motor bracket, and the motor bracket is arranged in the middle part of the bottom plate.

[0008] The motor support top end is provided with a motor, and a driving bevel gear is arranged in the motor support, and the driving bevel gear is coaxially arranged with a driving shaft, the bottom end of the driving shaft is connected with the bottom plate, and the top end penetrates through the motor support and is connected with the motor.

[0009] Preferably, the telescopic unit comprises a screw nut, the driving bevel gear is connected with one end of the screw nut, the screw nut is arranged on the bottom plate through the limiting unit, the other end of the screw nut is engaged with the input end of the trapezoidal screw, the output end of the trapezoidal screw is connected with the adapter end plate, and the adapter end plate is connected with the battery cell simulation block.

[0010] Preferably, the guiding unit comprises a rail bed and a linear slide, the rail bed is arranged on the bottom plate along the length direction, and the linear slide is arranged on the bottom of the adapter end plate, so that the linear slide and the rail bed form a guide rail guiding cooperation along the length direction.

[0011] Preferably, the guiding unit has two and is symmetrically arranged along the bottom of the adapter end plate.

[0012] The rail bed is a dovetail groove guide rail, which is installed on the bottom plate through a fixing screw, the linear slide is matched with the rail bed, so that the linear slide and the rail bed form a dovetail groove guide rail pair, and the linear slide is installed on the bottom of the adapter end plate through a countersunk screw.

[0013] Preferably, the limiting unit comprises a second bearing seat and a second bearing, the second bearing is coaxially sleeved on the screw nut, and the screw nut is arranged in the second bearing seat through the second bearing, and the second bearing seat is installed on the bottom plate through a fastening screw.

[0014] Preferably, the driving shaft is a stepped shaft, the upper end of the driving shaft is connected with the motor, the driving bevel gear is sleeved on the driving shaft from bottom to top, and the upper end face of the driving bevel gear abuts against the shaft shoulder of the driving shaft through a key, the lowermost segment of the driving shaft has the smallest diameter, the driving shaft is installed in the first bearing seat through the first bearing, and is locked through a locking nut.

[0015] Preferably, the battery cell simulation block is a rectangular plate, and the size depends on the size of the battery cell sample.

[0016] Preferably, the battery system sample is a battery module, and the battery cell simulation blocks are respectively arranged on the inner walls of the two end plates or two side plates of the battery module.

[0017] Preferably, the battery system sample is a CTP battery pack box, and the battery cell simulation blocks are respectively arranged on the inner walls of the frame of the CTP battery pack box.

[0018] Beneficial effects

[0019] The utility model discloses according to the expansion force of different battery system sample conversion into the torque that active component needs output, through the extrusion of active component drive electric core analog block to the shell inner wall deformation of battery system sample, whether the shell can bear the expansion deformation under this extrusion, to complete the anti-expansion deformation test of battery system sample.

[0020] Two, in fact, the output end can realize synchronous telescopic movement driven assembly can meet the needs of the utility model, but obviously, the application through the arrangement active component in the middle, make both sides driven bevel gear and driving bevel gear meshing, in this way, can not through external force, realize the effect of electric core analog block synchronous reverse linear movement.

[0021] Three, through the setting direction unit, make the linear guide and rail bed sliding fit, first, guarantee the linear movement of single electric core analog block, second, further guarantee the synchronous movement of driven assembly.

[0022] Four, the market can play the role of linear guide direction unit all meet the requirements of the utility model, all belong to the protection scope of the application, the application provides one of the embodiments, linear guide and rail bed constitute dovetail groove guide rail pair and guide.

[0023] Five, the method of the utility model discloses need not to design the special tooling of another, can be applicable to different size and structure form's battery system sample, has stronger universality, and electric core analog block can be replaced according to different electric core sample size, to simulate the expansion process of different electric core sample, wherein, the battery system sample can be battery module, and electric core analog block is respectively arranged on the inner wall of the two end plates or two side plates of battery module, and the anti-expansion deformation ability of battery module is tested.

[0024] The battery system sample can also be a CTP battery pack box, and multiple test devices can be used to simultaneously test the anti-expansion deformation of the CTP battery pack box, and the working condition of multiple electric core installations in the CTP battery pack box is completed.

[0025] Other features and advantages of the utility model will be set forth in the subsequent specification, and, partially become apparent from the specification, and / or be understood by implementation of the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structure indicated in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application and / or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments and / or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 The utility model test device perspective view is shown;

[0028] Figure 2 The utility model test device front view is shown;

[0029] Figure 3 The utility model test device explosion view is shown;

[0030] Figure 4 The utility model test device front view is shown.

[0031] Figure 5 The utility model embodiment one mode one schematic view is shown;

[0032] Figure 6 The utility model embodiment two schematic view is shown.

[0033] In the figure,

[0034] 1, bottom plate;

[0035] 2, driving assembly;21, driving bevel gear;22, motor support;23, motor;24, driving shaft;240, first bearing;241, first bearing seat;242, locking nut;

[0036] 3, driven assembly;31, driven bevel gear;32, telescopic unit;320, screw nut;321, limiting unit;3210, second bearing seat;3211, second bearing;322, trapezoidal screw;323, adapter end plate;33, guide unit;330, track bed;331, linear slide;

[0037] 4, battery module;

[0038] 5, CTP battery pack box;

[0039] 6, cell simulation block. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely explained in combination with the drawings in the embodiments of the utility model below, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0041] The utility model provides two kinds of test device's embodiments, reference Figure 1 , Figure 1 The utility model discloses a three -dimensional schematic diagram of test device in the embodiment of the utility model is shown, Figure 1 Can see, a kind of battery system anti-expansion deformation test device, including the bottom plate 1 of horizontal arrangement, the active component 2 of being equipped in the middle part above bottom plate 1, driven component 3 is arranged along active component 2 and is located on bottom plate 1 and is symmetrical, driven component 3 includes driven bevel gear 31, telescopic unit 32 and guiding unit 33, wherein,

[0042] Reference Figure 2 , Figure 2 The utility model discloses a front schematic diagram of test device in the embodiment of the utility model is shown;The active bevel gear 21 of active component 2 output end is engaged with driven bevel gear 31, driven bevel gear 31 connects one end of telescopic unit 32, and the other end of telescopic unit 32 is connected with electric core simulation block 6, active component 2 provides power, drives driven component 3 to drive corresponding electric core simulation block 6, and under the action of guiding unit 33, synchronous reverse linear movement action along horizontal direction is generated;

[0043] Electric core simulation block 6 is connected with the inner wall of the shell of battery system sample respectively, and through the synchronous contraction or synchronous extension of electric core simulation block 6, the anti-expansion deformation capacity of battery system is tested.

[0044] The utility model according to the expansion force of different battery system sample conversion into the torque required to be output by active component 2, drives electric core simulation block 6 to the deformation of the shell inner wall of battery system sample and applies extrusion force by active component 2, whether the shell can withstand the expansion deformation under the extrusion force is observed, to complete the anti-expansion deformation test of battery system sample.

[0045] Reference Figure 3 , Figure 3 The utility model discloses an explosion diagram of test device in the embodiment of the utility model is shown;Active component 2 includes motor support 22, and motor support 22 is erected in the middle part of bottom plate 1;

[0046] The motor 23 is installed at the top end of the motor support 22, and a driving bevel gear 21 is arranged in the motor support 22, the axis of the driving bevel gear 21 is vertical, and the driving bevel gear 21 is coaxially arranged with a driving shaft 24, the bottom end of the driving shaft 24 is connected with the bottom plate 1, and the top end penetrates through the motor support 22 and is connected with the motor 23.

[0047] The motor 23 is the power source of the whole device, is installed on the motor support 22 through a fastening bolt, can output a constant torque driving moment, and the motor support 22 usually has a vertical column extending from the four corners of the bottom of a horizontal plate, and the bottom of the vertical column is provided with a threaded hole, a first screw is connected with the threaded hole through the bottom plate 1, so that the motor support 22 is installed and fixed with the bottom plate 1.

[0048] Reference Figure 4 , Figure 4 A front view of the test device is shown in the embodiment of the utility model; the telescopic unit 32 includes a screw nut 320, the driving bevel gear 31 is connected with one end of the screw nut 320, the screw nut 320 is arranged on the bottom plate 1 through a limiting unit 321, the limiting unit 321 includes a second bearing seat 3210 and a second bearing 3211, the second bearing 3211 is a tapered roller bearing, is used in pairs, can bear axial force and radial force, the second bearing 3211 is coaxially arranged on the screw nut 320, and the screw nut 320 is arranged in the second bearing seat 3210 through the second bearing 3211, the second bearing seat 3210 is installed on the bottom plate 1 through a fastening screw, and the other end of the screw nut 320 is engaged with the input end of a trapezoidal screw 322, so that the rotary motion of the screw nut 320 is converted into the linear reciprocating motion of the trapezoidal screw 322 along the horizontal direction, the output end of the trapezoidal screw 322 is connected with a switching terminal plate 323, and the switching terminal plate 323 is connected with the battery cell simulation block 6.

[0049] In fact, the driven assembly 3 that can realize synchronous telescopic motion at the output end can meet the demand of the utility model, but obviously, the application is arranged with the driving assembly 2 in the middle, so that the driving bevel gear 21 is engaged with the driving bevel gear 21 on both sides, so that the effect of synchronous reverse linear motion of the battery cell simulation block 6 can be realized without external force.

[0050] The guiding unit 33 includes a rail bed 330 and a linear slide 331, the rail bed 330 is arranged on the bottom plate 1 along the length direction, and the linear slide 331 is arranged at the bottom of the switching terminal plate 323, so that the linear slide 331 is guided and matched with the rail bed 330 along the length direction.

[0051] By arranging the guiding unit 33, the linear slide 331 is matched with the rail bed 330, which can ensure the linear motion of the single battery cell simulation block 6, and further ensure the synchronous motion of the driven assembly 3.

[0052] The guide units 33 are two and symmetrically arranged along the bottom of the adapter end plate 323;

[0053] The rail bed 330 is a dovetail guide rail and is installed on the bottom plate 1 through a fixing screw. The linear sliding block 331 is arranged in cooperation with the rail bed 330, so that the linear sliding block 331 and the rail bed 330 form a dovetail guide rail pair. The linear sliding block 331 is installed on the bottom of the adapter end plate 323 through a countersunk screw.

[0054] Obviously, the two guide units 33 make the adapter end plate 323 more stable and reliable when moving linearly and reciprocally.

[0055] The guide units 33 that can play a linear guiding role on the market all meet the requirements of the utility model and all belong to the protection range of the application. The application provides one of the embodiments, that is, the linear sliding block 331 and the rail bed 330 form a dovetail guide rail pair for guiding.

[0056] The driving shaft 24 is a stepped shaft. The upper end of the driving shaft 24 is connected with the motor 23. The driving bevel gear 21 is sleeved on the driving shaft 24 from bottom to top, and the upper end face of the driving bevel gear 21 abuts against the shaft shoulder of the driving shaft 24. The driving bevel gear 21 is fixed through a key. The lowermost segment of the driving shaft 24 has the smallest diameter. The driving shaft 24 is installed in the first bearing seat 241 through the first bearing 240 and is locked through the locking nut 242. The first bearing 240 is a deep groove ball bearing.

[0057] Specific implementation steps are as follows. The motor 23 starts to output torque, drives the driving bevel gear 21 to rotate, the driving bevel gear 21 meshes with the driven bevel gear 31, plays a role of speed reduction and torque increase, the driven bevel gear 31 drives the screw nut 320 to rotate, the screw nut 320 meshes with the trapezoidal screw 322, so that the rotary motion of the screw nut 320 is converted into the horizontal reciprocating linear motion of the trapezoidal screw 322, thereby driving the battery cell simulation block 6 to generate a synchronous reverse linear motion.

[0058] At this time, two specific embodiments can be provided according to different battery system samples of the anti-expansion deformation test.

[0059] Embodiment one is to perform the anti-expansion deformation test on the battery module 4. The embodiment one can be realized in two ways.

[0060] Reference Figure 5 , Figure 5 The embodiment one of the utility model is shown in a schematic diagram. In mode one, the battery cell simulation block 6 is respectively arranged on the inner walls of the two end plates of the battery module 4, and the anti-expansion deformation test is performed on the battery module 4.

[0061] In mode two, the battery cell simulation block 6 is respectively arranged on the inner walls of the two side plates of the battery module 4, and the anti-expansion deformation test is performed on the battery module 4.

[0062] Reference Figure 6 , Figure 6 The utility model discloses a testing device schematic view of CTP battery package box body in the embodiment of the utility model, and the second embodiment is to carry out the anti -expansion deformation test to CTP battery package box body 5, and the cell simulation block 6 is respectively installed in the frame inner wall of CTP battery package box body 5, and the anti -expansion deformation test is carried out to CTP battery package box body 5.

[0063] Further, the cell simulation block 6 is a rectangular plate, and the size depends on the battery system sample size.

[0064] The method of the utility model can be applied to battery system samples of different sizes and structures without designing special tooling, and has strong versatility. At the same time, the cell simulation block 6 can be replaced according to different battery system sample sizes, thereby simulating the expansion process of different battery system samples. The battery system sample can be a battery module 4, and the cell simulation block 6 is respectively installed on the two end plates of the battery module 4 to test the anti-expansion deformation capability of the battery module 4.

[0065] The battery system sample can also be a CTP battery package box body 5. Multiple testing devices can be used to simultaneously test the anti-expansion deformation of the CTP battery package box body 5, and the working condition of multiple rows of cells installed in the CTP battery package box body 5 can be completed.

[0066] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, and / or some technical features can be replaced. These modifications and / or replacements do not change the essence of the corresponding technical solutions, and do not deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A battery system anti-expansion deformation testing device, characterized in that: The invention comprises a horizontally arranged base plate (1), a driving component (2) is arranged in the middle of the upper portion of the base plate (1), a driven component (3) is arranged on the base plate (1) and symmetrically along the driving component (2), and the driven component (3) comprises a driven bevel gear (31), a telescopic unit (32) and a guide unit (33), wherein: The active bevel gear (21) at the output end of the active component (2) is meshed with the driven bevel gear (31), the driven bevel gear (31) is connected to one end of the telescopic unit (32), and the other end of the telescopic unit (32) is connected to the battery simulation block (6). The active component (2) provides power to drive the driven component (3) to drive the corresponding battery simulation block (6), and under the action of the guide unit (33), a synchronous reverse linear movement action is generated along the horizontal direction; The battery cell simulation blocks (6) are respectively connected to both sides of the inner wall of the shell of the battery system sample, and the battery cell simulation blocks (6) are synchronously retracted inwardly or synchronously extended outwardly.

2. A battery system anti-expansion deformation testing device according to claim 1, characterized in that: The active component (2) includes a motor bracket (22), and the motor bracket (22) is mounted in the middle of the base plate (1); The motor (23) is installed on the top of the motor bracket (22), and the driving bevel gear (21) is arranged in the motor bracket (22). The driving shaft (24) is coaxially arranged with the driving bevel gear (21). The bottom end of the driving shaft (24) is connected to the bottom plate (1) and the top end passes through the motor bracket (22) and is connected to the motor (23).

3. A battery system anti-expansion deformation testing device according to claim 1, characterized in that: The telescopic unit (32) includes a lead screw nut (320), the driven bevel gear (31) is connected to one end of the lead screw nut (320), the lead screw nut (320) is rotatably arranged on the base plate (1) through the limiting unit (321), and the other end of the lead screw nut (320) is engaged with the input end of the trapezoidal lead screw (322), the output end of the trapezoidal lead screw (322) is connected to the adapter end plate (323), and the adapter end plate (323) is connected to the battery cell simulation block (6).

4. A battery system anti-expansion deformation testing device according to claim 3, characterized in that: The guide unit (33) comprises a rail bed (330) and a linear slider (331); the rail bed (330) is arranged on the base plate (1) along the length direction, and the linear slider (331) is arranged at the bottom of the adapter end plate (323), so that the linear slider (331) and the rail bed (330) form a guide rail guide cooperation along the length direction.

5. A battery system anti-expansion deformation testing device according to claim 4, characterized in that: There are two guide units (33), which are symmetrically arranged along the bottom of the adapter end plate (323); The rail bed (330) is a dovetail groove guide rail, which is mounted on the base plate (1) by fixing screws. The linear slider (331) is matched with the rail bed (330) so that the linear slider (331) and the rail bed (330) form a dovetail groove guide rail pair, and the linear slider (331) is mounted on the bottom of the adapter end plate (323) by countersunk screws.

6. A battery system anti-expansion deformation testing device according to claim 3, characterized in that: The limiting unit (321) comprises a second bearing seat (3210) and a second bearing (3211), wherein the second bearing (3211) is coaxially sleeved on the screw nut (320), and the screw nut (320) is arranged in the second bearing seat (3210) through the second bearing (3211), and the second bearing seat (3210) is mounted on the base plate (1) by fastening screws.

7. A battery system anti-expansion deformation testing device according to claim 2, characterized in that: The driving shaft (24) is a stepped shaft. The upper end of the driving shaft (24) is connected to the motor (23). The driving bevel gear (21) is sleeved on the driving shaft (24) from bottom to top until the upper end surface of the driving bevel gear (21) contacts the shoulder of the driving shaft (24). The driving shaft (24) is fixed by a key. The lowermost section of the driving shaft (24) has the smallest diameter and is installed in the first bearing seat (241) through the first bearing (240) and locked by the locking nut (242).

8. The battery system anti-expansion deformation testing device according to claim 1, characterized in that: The battery cell simulation block (6) is a rectangular plate, and its size depends on the size of the battery cell sample.

9. The battery system anti-expansion deformation testing device according to claim 1, characterized in that: The battery system sample is a battery module (4), and the battery core simulation blocks (6) are respectively installed on the inner walls of the two end plates or two side plates of the battery module (4).

10. The battery system anti-expansion deformation testing device according to claim 1, characterized in that: The battery system sample is a CTP battery pack box (5), and the battery cell simulation blocks (6) are respectively installed on the inner wall of the CTP battery pack box (5).

Images