CN215414149U

CN215414149U - Extrusion force measuring device for double-row battery cell module

Info

Publication number: CN215414149U
Application number: CN202121758356.3U
Authority: CN
Inventors: 李广俊
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-01-04
Anticipated expiration: 2031-07-29

Abstract

The utility model provides a double-row battery cell module extrusion force measuring device which comprises a bedplate, a pair of side top plates, a pair of end top plates and a force measuring unit, wherein the pair of side top plates are arranged at intervals along the width direction of the module, and each side top plate has a length extending along the length direction of the module; at least one of the side top plates is operable to have movement along the width direction of the module to flatten each cell; the pair of end top plates are arranged at intervals along the length direction of the module; at least one of the end top plates is operable to have movement along the length of the module to apply a top thrust in the length of the module; the force measuring unit is used for detecting the pushing force applied to each flat battery cell by the end top plate. According to the double-row battery cell module extrusion force measuring device, each battery cell is leveled through the side top plate, the end top plate exerts the jacking force on each battery cell in the length direction of the module, and the force measuring unit detects the jacking force exerted on each leveled battery cell by the end top plate, so that the improvement of the measurement precision of the extrusion force is facilitated.

Description

Extrusion force measuring device for double-row battery cell module

Technical Field

The utility model relates to the technical field of power battery testing, in particular to a device for measuring extrusion force of a double-row battery cell module.

Background

A lithium ion battery is a type of secondary battery that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During the charge and discharge process, lithium ions are intercalated and deintercalated between the two electrodes. During charging, lithium ions are extracted from the positive electrode and are inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; and the opposite when discharging.

With the popularization of lithium ion batteries, people have higher and higher requirements on energy density of batteries. Wherein, double electric core module has two rows of electric cores, and has higher energy density and higher percentage of unitization, makes it obtain more and more attention and application.

Before assembling and fixing the double-row battery cell modules, the tools are required to be used for extruding and shaping the grouped modules, and the modules after extrusion are fixed by the aid of the bundling belts. The extrusion force between the electric cores in the forming state is the key for influencing the performance of the module after forming. In order to improve the uniformity of the battery modules, it is necessary to extrude the battery modules under a designed extrusion force. And because the specification of double electric core is great for the test degree of difficulty of extrusion force is big, thereby influences the uniformity of battery module.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a device for measuring an extrusion force of a dual-row electrical core module, so as to detect an extrusion force of the module in a length direction of the module.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a double-row battery cell module extrusion force measuring device is used for detecting extrusion force between two battery cells spliced along the length direction of a module and comprises a bedplate, a pair of side top plates, a pair of end top plates and a force measuring unit, wherein the pair of side top plates are arranged at intervals along the width direction of the module, and each side top plate has a length extending along the length direction of the module; the side top plate of at least one of the side top plates is operable to move along the width direction of the module so as to level each battery cell on two sides of the width direction of the module; the pair of end top plates are arranged at intervals along the length direction of the module, and each end top plate has a length extending along the width direction of the module; the end top plate of at least one of the end top plates is operable to move along the length direction of the module so as to apply jacking force to the battery cores flattened by the side top plates on two sides of the length direction of the module; the force measuring unit is used for detecting the jacking force applied to each flat battery cell by the end top plate.

Further, a first driving part for driving the side top plate to move is arranged on the bedplate, and the first driving part is configured to be a lead screw which takes the axis of the first driving part as an axis and can operate and rotate; the side top plate is connected to the screw rod in a translation mode.

Furthermore, a guide device for guiding the translation of the side top plate is arranged on the bedplate.

Further, the guide device comprises a pair of first guide rails arranged in parallel, each first guide rail is arranged at intervals along the length direction of the module, and each first guide rail extends along the width direction of the module; the side top plate is slidably fitted on the first guide rail.

Furthermore, a second driving part for driving the end top plate to move is arranged on the bedplate; the second driving part comprises a driving end and a moving block for bearing the driving force of the driving end, and the force measuring unit adopts a pressure sensor arranged between the moving block and the end top plate.

Further, the driving end is configured as a lead screw which is operable to rotate with its own axis as an axis, and the moving block is connected to the lead screw in a translational manner.

Furthermore, a pair of second guide rails arranged in parallel is arranged on the bedplate, each second guide rail is arranged at intervals along the width direction of the module, and each second guide rail extends along the length direction of the module; the moving block is assembled on the second guide rail in a sliding mode.

Furthermore, a hand wheel is fixedly connected to the screw rod.

Furthermore, a supporting part is fixedly arranged on the bedplate and used for supporting the battery cores with the side top plates flat.

Furthermore, the supporting part comprises a plurality of supporting rails arranged in parallel, and the supporting rails are distributed at intervals along the width direction of the module and extend along the length direction of the module.

Compared with the prior art, the utility model has the following advantages:

according to the double-row battery cell module extrusion force measuring device, the two sides of the width direction of the module can be flattened and each battery cell can be restrained by moving the pair of side top plates along the width direction of the module, the top thrust can be applied to each battery cell flattened by the side top plates in the length direction of the module by moving the pair of side top plates along the length direction of the module, and the top thrust applied to each flattened battery cell by the top plate of the detection end of the force measuring unit is detected, so that the double-row battery cell module extrusion force measuring device is beneficial to improving the measurement of the double-row battery cell module extrusion force, the measurement precision and the production consistency of a battery module.

In addition, the first driving part adopts a lead screw, so that arrangement and implementation are convenient, and the operation is convenient. And the arrangement of the first guide rail is beneficial to guiding the sliding of the side top plate, so that the stability of the side top plate in use is improved. The second driving part applies extrusion force to the end top plate through the moving block, so that a good extrusion effect is achieved, the pressure sensor is mature in product, and the measurement accuracy of the extrusion force is high.

In addition, the screw rod is simple in structure and convenient to operate and install the moving block on the screw rod. The moving block is arranged on the second guide rail in a sliding mode, so that the stability of the moving block in use is improved. The arrangement of the hand wheel is convenient for rotating the lead screw. Adopt to support the rail and support electric core after leveling, do benefit to the level and smooth effect of electric core.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a device for measuring extrusion force of a double-row cell module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first driving portion and a side top plate according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second driving portion and an end top plate according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a device for measuring extrusion force of a double-row cell module according to an embodiment of the present invention in use;

description of reference numerals:

1. a platen; 2. a side roof panel; 3. an end top plate; 4. an insulating sheet; 5. an electric core; 6. a second lead screw; 7. a moving block; 8. a pressure sensor; 9. a first lead screw; 10. an end plate;

101. a second guide rail; 102. a first guide rail; 103. a second fixed seat; 104. a support rail; 105. supporting legs; 106. a first fixed seat;

201. a first portion; 202. a second portion; 203. a mounting seat; 204. reinforcing ribs; 205. a first slider;

301. a vertical portion; 302. a transverse portion; 3021. a second slider;

601. a second hand wheel;

901. a first hand wheel.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The embodiment relates to a double-row battery cell module extrusion force measuring device, which is used for detecting the extrusion force between two battery cells 5 spliced along the length direction of the module. The measuring device comprises a bedplate 1, a pair of side top plates 2, a pair of end top plates 3 and a force measuring unit.

Wherein, a pair of side roof boards 2 is arranged along the width direction of the module at intervals, and each side roof board 2 has a length extending along the length direction of the module. Wherein at least one of the side top plates 2 is operable to have a movement in the module width direction to flatten each cell 5 on both sides of the module width direction.

A pair of end top plates 3 are provided at intervals in the length direction of the module, each end top plate 3 having a length extending in the width direction of the module. At least one of the end top plates 3 is operable to have a movement along the length of the module to apply a top thrust to each of the cells 5 flattened by the side top plate 2 on both sides of the length of the module. The force measuring unit is used for detecting the pushing force applied to each flat battery cell 5 by the end top plate 3.

Based on the above general description, an exemplary structure of the dual-row cell module pressing force measuring device described in this embodiment is shown in fig. 1. The platen 1 is a flat plate serving as a mounting carrier for a pair of side top plates 2 and a pair of end top plates 3. The bottom surface of this platen 1 is equipped with a plurality of supporting legs 105 to support platen 1 on certain height, thereby be convenient for use double electric core module extrusion force measuring device. Of course, the bedplate 1 can also be fixed directly on a frame with a certain height to achieve the same use effect.

In this embodiment, a support portion is fixedly disposed on the platen 1, and the support portion is used for supporting each battery cell 5 with the side top plate 2 being flat. As shown in fig. 1, the supporting portion in this embodiment includes three supporting rails 104 arranged in parallel, and the supporting rails 104 are distributed at intervals along the width direction of the module and arranged to extend along the length direction of the module. The bottoms of the two electric cores 5 arranged in the module width direction are supported on the three support rails 104, respectively.

It can be understood that, in the present embodiment, the number of the support rails 104 may also be adjusted according to specific use requirements, as long as the battery cell 5 can be supported. In addition, in order to improve the use effect of the support rail 104, an insulation sheet 4 is disposed on the top of the support rail 104, and the support surface for supporting the battery cell 5 is specifically the upper surface of the insulation sheet 4.

The pair of side top plates 2 in this embodiment specifically includes two side top plates 2 respectively provided on both sides in the width direction of the support portion, and the pair of end top plates 3 specifically includes two end top plates 3 respectively provided on both ends in the length direction of the support portion. The two side top plates 2 and the two end top plates 3 define a mounting space of the module. The structure of the side top panel 2 will be explained below.

As shown in fig. 1 and 2, the side top plate 2 in the present embodiment is L-shaped as a whole, and has a first portion 201 disposed perpendicular to the platen 1, and a second portion 202 connected to the bottom of the first portion 201 and parallel to the platen 1. The first portion 201 of the side top plate 2 abuts against the battery cell 5, thereby leveling the battery cell 5.

In order to improve the structural strength of the side top panel 2, in the present embodiment, a reinforcing rib 204 is connected between the first portion 201 and the second portion 202, and the reinforcing rib 204 is provided in plurality at intervals along the length direction of the side top panel 2. The side top plate 2 in the embodiment has a simple structure, is convenient to machine and form, has a better pushing effect, and is beneficial to flattening the battery cell 5. In addition, an insulating sheet 4 is provided on a side surface of the first portion 201 abutting against the cell 5 to improve an effect of the side top plate 2 in use.

It should be noted that, a pair of side roof plates 2 level each electric core 5 in module width direction's both sides and mean, two side roof plates 2 push away electric core 5 in module width direction both sides, make two electric cores 5 and the vertical part 301 looks butt of two side roof plates 2 of arranging along the width direction of module. The battery cell 5 after leveling can only be stressed and deformed in the length direction of the module, so that the force measuring unit can detect the jacking force conveniently.

Preferably, both side top panels 2 in this embodiment are operable to have movement in the module width direction. In order to drive the side top plate 2, in the present embodiment, the platen 1 is provided with a first driving portion for driving the side top plate 2 to move corresponding to each side top plate 2. The first drive portion is configured as a first lead screw 9 that is operable to rotate about its axis. Each side top plate 2 is connected to the corresponding first lead screw 9 in a translational manner.

With reference to fig. 1 and 2, the first lead screw 9 in this embodiment is connected to the middle of the side top plate 2, the bottom of the middle of the second portion 202 is fixedly provided with a mounting seat 203, and the platen 1 on the outer side of the side top plate 2 is provided with a first fixing seat 106 corresponding to the mounting seat 203. The first lead screw 9 passes through the first fixed seat 106 and the mounting seat 203 in a direction perpendicular to the side top plate 2.

The first lead screw 9 is rotatably disposed on the first fixing seat 106 and is connected to the mounting seat 203 in a threaded manner. Thus, by rotating the first lead screw 9, the mounting seat 203 can be driven to drive the side top plate 2 to move in a manner parallel to the platen 1, and the battery cell 5 is supported on the support rail 104 flatly by pushing the battery cell 5. In addition, a first hand wheel 901 may be further disposed at the operation end of the first lead screw 9 to facilitate the operation of the first lead screw 9 for rotation.

In order to improve the stability of the side top plate 2 in use, in the present embodiment, a guide device for guiding the translation of the side top plate 2 is provided on the platen 1. Preferably, the guide means comprises a pair of first guide rails 102 arranged in parallel, each first guide rail 102 being arranged at an interval along the length direction of the module, each first guide rail 102 extending along the width direction of the module, the side top panel 2 being slidably fitted on the first guide rails 102.

In detail, as shown in fig. 1 and 2 with continued reference, first guide rails 102 are disposed on the deck 1 corresponding to both ends of the side ceiling plate 2. Corresponding to the first guide rail 102, first sliding blocks 205 are respectively arranged on the bottom surfaces of the second portions 202 on the side top plates 2, and the first sliding blocks 205 are slidably arranged on the first guide rail 102 through first sliding grooves arranged thereon.

First guide rail 102 in this embodiment is simple in structure, is convenient for arrange on platen 1 and implements, and is better to the guide effect of side roof 2 to do benefit to and improve the level and smooth effect of side roof 2 to electric core 5. Of course, the number of first guide rails 102 in the present embodiment may also be increased according to specific use requirements. The guide means may be other than the first guide rail 102, and may be other structures that can guide the side top panel 2 in the movement in the related art.

In addition, all can remove under the drive of first lead screw 9 through two side roof 2 in this embodiment, can be when leveling electric core 5, make the jacking force that receives on the module width direction comparatively balanced to improve electric core 5's level and smooth effect, and extrusion force testing result degree of accuracy.

It is understood that the present embodiment may also adopt a structure in which one side top plate 2 is movable by the first lead screw 9, and the other side top plate 2 is fixedly disposed with respect to the platen 1. At this moment, the two side top plates 2 are matched to enable the battery cell 5 to be flat. However, the leveling method may make the acting force applied to the battery cell 5 during movement inconsistent, and the comprehensive use effect is slightly poor.

The structure of the end top plate 3 in this embodiment is as shown in fig. 1 and 3, and the end top plate 3 is also L-shaped, and has a vertical portion 301 disposed perpendicularly to the bedplate 1, and a lateral portion 302 vertically connected to the bottom of the vertical portion 301 and disposed parallel to the bedplate 1. Wherein the vertical portion 301 of the end top plate 3 abuts the end plate 10 of the module, thereby acting to apply a compression force in the length direction of the module.

Further, the insulating sheet 4 is also provided on the contact surface of the vertical portion 301 with the end plate 10. Wherein the insulating sheet 4 abuts on the end plate 10. The insulating sheet 4 and the insulating sheets 4 described above may be made of a material having insulating properties such as polycarbonate.

Preferably, both end top plates 3 in this embodiment are operable to have movement along the length of the module to apply a compressive force to the module at both ends of the module. To facilitate driving the end plate 3, in the present embodiment, a second driving portion for driving the end plate 3 to move is provided on the platen 1. The second driving part comprises a driving end and a moving block 7 for receiving the driving force of the driving end, and the force measuring unit adopts a pressure sensor 8 arranged between the moving block 7 and the end top plate 3.

The driving end in this embodiment is configured as a second lead screw 6 that is operable to rotate about its own axis, and a moving block 7 is connected to the second lead screw 6 in a translational manner. The second lead screw 6 in this embodiment is connected to the middle of the end top plate 3. In a specific structure, as shown in fig. 1 and 3, two second fixing seats 103 are provided at intervals outside and inside the end top plate 3. The second lead screw 6 passes through the two second fixing seats 103 along the direction perpendicular to the end top plate 3, and is rotatably arranged on the second fixing seats 103. A second hand wheel 601 may be further provided at the operation end of the second lead screw 6 to facilitate the operation of the second lead screw 6 for rotation.

The moving block 7 is located between the two second fixing seats 103, and the second lead screw 6 passes through the moving block 7 and is connected with the moving block 7 in a threaded manner. The pressure sensor 8 is located on the moving block 7 or the end top plate 3. Thus, by rotating the second wheel 601, the moving block 7 is driven to move towards the end top plate 3, and the pressure sensor 8 pushes the end top plate 3 to apply a pressing force to the battery cell 5.

And the pressure sensor 8 is located on the force transmission path of the extrusion force in the length direction of the module, so that the extrusion force can be measured. The extrusion force that this pressure sensor 8 measured equals the extrusion force between two electric cores 5 along the module length direction concatenation here.

In order to improve the stability of the end top plate 3 and the moving block 7 in use, in this embodiment, a pair of second guide rails 101 are provided in parallel on the platen 1, each second guide rail 101 being provided at an interval in the width direction of the module, and each second guide rail 101 extending in the length direction of the module.

In a concrete structure, as shown in fig. 1 and 3 in conjunction, the second guide rails 101 are arranged on the deck 1 corresponding to both ends of the end top 3. Corresponding to the second guide rails 101, second sliders 3021 are respectively disposed on the bottom surfaces of the horizontal portions of the end top plate 3, and the second sliders 3021 are slidably disposed on the second guide rails 101 through second slide grooves provided thereon. The moving block 7 is slidably mounted on the second guide rail 101 via a third slide groove formed in the moving block.

The second guide rail 101 in this embodiment has a simple structure, is convenient to arrange and implement on the bedplate 1, and has a good guiding effect on the end top plate 3, thereby facilitating the application of the extrusion force in the length direction of the module. In addition, all can remove under the drive of second lead screw 6 through two end roof 3 in this embodiment, can be when exerting the extrusion force to electric core 5 for the extrusion force that module length direction both ends received is comparatively balanced, thereby improves the degree of accuracy of extrusion force test.

In addition, pressure sensor 8 in this embodiment is also for two at the module both ends of arranging, so, when the electric core 5 quantity on the length direction of module is more, through the detection of two pressure sensor 8 to the extrusion force, do benefit to the improvement and detect the precision.

It will be appreciated that the present embodiment may also be adopted in which one end top plate 3 is movable by the movable block 7, while the other end top plate 3 is fixedly arranged with respect to the bedplate 1. But the pressure sensor 8 may also be arranged at one end of the module only. At this time, the two end top plates 3 are also fitted to apply a pressing force in the longitudinal direction of the module, and the pressing force is detected. However, when the number of the battery cells 5 in the length direction is large, the pressing force applied to the battery cells 5 during movement is not consistent due to the solution, and thus the measurement accuracy is not as high as that of the solution in which both the end top plates 3 move.

When the double-row battery cell module extrusion force measuring device described in this embodiment is used, firstly, the module components including the battery cell 5, the end plate 10, the insulating member, and the like are placed on the support rail 104 according to the designed positions. Then, by rotating the two first hand wheels 901, the top plates 2 on the two sides are respectively tightly attached to the side edges of the battery cell 5, so that the battery cell 5 is ensured to be flat. Then, the second hand wheel 601 is rotated to make the moving block 7 push the pressure sensor 8 and then push the end top plates 3, so that the end top plates 3 at the two ends are respectively tightly attached to the end plates 10 of the module. And continuing rotating the second hand wheel 601, when the pressure values detected by the two pressure sensors 8 are equal to the designed extrusion force value, indicating that the extrusion force in the module reaches the designed extrusion force value, and fixing the module outside the module by using a binding belt at the moment, thereby completing the assembly of the module.

In addition, the first hand wheel 901 and the second hand wheel 601 are simply rotated in the opposite direction, so that the module is released from the restraint of the side top plate 2 and the end top plate 3, and the assembled module is taken out.

This embodiment double electric core module extrusion force measuring device, through the removal of a pair of side roof 2 along module width direction, can level and smooth and restraint each electric core 5 in module width direction's both sides, and through the removal of a pair of end roof 3 along module length direction, can exert thrust to each electric core 5 through side roof 2 is smooth in the length direction of module, exert thrust to smooth each electric core 5 through dynamometry unit sense terminal roof 3, thereby do benefit to the measurement accuracy that improves double electric core 5 module extrusion force, and the uniformity of assembly back module.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a double electric core module extrusion force measuring device for detect along the extrusion force between two electric cores (5) of module length direction concatenation, its characterized in that: the measuring device comprises a bedplate (1), a pair of side top plates (2), a pair of end top plates (3) and a force measuring unit,

the pair of side top plates (2) are arranged at intervals along the width direction of the module, and each side top plate (2) has a length extending along the length direction of the module; at least one of the side top plates (2) is operable to have movement in the module width direction to flatten each of the battery cells (5) on both sides of the module width direction;

the pair of end top plates (3) are arranged at intervals along the length direction of the module, and each end top plate (3) has a length extending along the width direction of the module; the end top plate (3) of at least one of the end top plates is operable to move along the length direction of the module so as to apply jacking force to each battery core (5) flattened by the side top plate (2) at two sides of the length direction of the module;

the force measuring unit is used for detecting the pushing force applied to each flat battery cell (5) by the end top plate (3).

2. The double-row battery cell module extrusion force measuring device of claim 1, characterized in that:

the bedplate (1) is provided with a first driving part for driving the side top plate (2) to move, and the first driving part is a lead screw which takes the axis of the first driving part as a shaft and can operate and rotate;

the side top plate (2) is connected to the screw rod in a translation mode.

3. The double-row battery cell module extrusion force measuring device of claim 2, characterized in that:

and a guide device for guiding the lateral top plate (2) to move horizontally is arranged on the bedplate (1).

4. The double-row battery cell module extrusion force measuring device of claim 3, characterized in that:

the guide device comprises a pair of first guide rails (102) arranged in parallel, wherein the first guide rails (102) are arranged at intervals along the length direction of the module, and the first guide rails (102) extend along the width direction of the module; the side top plate (2) is slidably fitted on the first guide rail (102).

5. The double-row battery cell module extrusion force measuring device of claim 1, characterized in that:

the bedplate (1) is provided with a second driving part for driving the end top plate (3) to move;

the second driving part comprises a driving end and a moving block (7) for bearing the driving force of the driving end, and the force measuring unit adopts a pressure sensor (8) arranged between the moving block (7) and the end top plate (3).

6. The double-row battery cell module extrusion force measuring device of claim 5, characterized in that:

the drive end is designed as a spindle which is rotatable about its own axis and to which the moving block (7) is connected in a translatory manner.

7. The double-row battery cell module extrusion force measuring device of claim 6, characterized in that:

a pair of second guide rails (101) arranged in parallel is arranged on the bedplate (1), the second guide rails (101) are arranged at intervals along the width direction of the module, and the second guide rails (101) extend along the length direction of the module;

the moving block (7) is assembled on the second guide rail (101) in a sliding mode.

8. The double-row battery cell module extrusion force measuring device of claim 6, characterized in that:

and the lead screw is fixedly connected with a hand wheel.

9. The double-row battery cell module extrusion force measuring device of claim 1, characterized in that:

and supporting parts are fixedly arranged on the bedplate (1), and the supporting parts are used for supporting the battery cores (5) which are flat on the side top plate (2).

10. The double-row battery cell module extrusion force measuring device of claim 9, characterized in that:

the supporting part comprises a plurality of supporting rails (104) which are arranged in parallel, and the supporting rails (104) are distributed at intervals along the width direction of the module and extend along the length direction of the module.