CN219319629U

CN219319629U - Cell stacking extrusion force measuring device

Info

Publication number: CN219319629U
Application number: CN202223482176.4U
Authority: CN
Inventors: 谭海亮; 周朋; 方明; 卫炳霖; 甄帅
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-07-07
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a cell stacking extrusion force measuring device. The electric core stacking extrusion force measuring device comprises a base, a fixing assembly and an extrusion force measuring assembly, wherein a plurality of electric cores are abutted between the fixing assembly and the extrusion force measuring assembly, the extrusion force measuring assembly comprises a pressure plate and a movable plate, the pressure plate is connected with the movable plate in a sliding mode along the extrusion direction, a pressure sensor is fixedly arranged between the movable plate and the pressure plate, the pressure sensor is abutted between the movable plate and the pressure plate, and a corresponding detection value can be given out according to the distance between the movable plate and the pressure plate. The pressure sensor indirectly measures the extrusion force received by the battery cell through the change condition of the distance between the movable plate and the pressure plate, can meet the requirement of whole-course detection, and can extrude the surface of the battery cell through the pressure plate, and can not damage the surface of the battery cell. Meanwhile, the pressure sensor is fixedly arranged between the movable plate and the pressure plate, so that the relative consistent detection position can be maintained, and the accuracy of the detection value can be further improved.

Description

Cell stacking extrusion force measuring device

Technical Field

The utility model relates to the technical field of battery production, in particular to a cell stacking extrusion force measuring device.

Background

In the production process of the battery module, a stacking and extruding process is required. Specifically, the electric cores are arranged and stacked, and then are extruded by a pressing mechanism after stacking, and the arranged electric cores are extruded to the size required by production by extrusion.

The existing pressing mechanism can realize the extrusion of the battery cell, but the extrusion force needs to be measured during the extrusion process to meet the safety and production requirements. In the measurement process, the extrusion is generally stopped, the extruded surface of the battery cell is exposed, the pressure sensor is placed on the extruded surface of the battery cell, then the extrusion is performed again, and the detection value of the pressure sensor is read. However, in this process, there are the following problems:

1. the extrusion force cannot be measured in the whole process, so that the response cannot be timely made when the pressure of the extrusion core is too high;

2. the pressure sensor is placed manually, and the detection value is inaccurate due to the fact that the placement position is incorrect and inaccurate and eccentricity is generated;

3. during the measurement process, the pressure sensor may damage the pressed surface of the cell.

Based on the foregoing, there is a need for a cell stacking extrusion force measuring device that can solve the above-mentioned technical problems.

Disclosure of Invention

The utility model aims to provide a cell stacking extrusion force measuring device which can measure extrusion force in the whole process and prevent the extruded surface of a cell from being damaged.

To achieve the purpose, the utility model adopts the following technical scheme:

cell stack extrusion force measurement device includes:

the base is provided with a constraint structure, the constraint structure is used for enabling a plurality of electric cores to be arranged along the extrusion direction, and the electric cores form an extrusion unit;

the fixing assembly is fixedly connected to the base;

the extrusion force measurement assembly is fixedly connected to the base, the extrusion force measurement assembly comprises a pressure plate and a movable plate, the pressure plate is connected to the movable plate in a sliding manner along the extrusion direction, the movable plate and the pressure plate are movably arranged along the extrusion direction, and a pressure sensor is fixedly abutted between the movable plate and the pressure plate;

the pressing unit has two ends along the pressing direction, the fixing assembly is abutted against one end of the pressing unit, and the movable plate drives the pressure plate to be abutted against the other end of the pressing unit.

Optionally, the movable plate is provided with a first linear bearing in a penetrating manner, a first sliding shaft is arranged in the first linear bearing in a sliding manner, and the first sliding shaft is fixedly connected to the pressure plate.

Optionally, the first sliding shaft is provided with a first shaft snap spring, and the first shaft snap spring abuts against the pressure plate.

Optionally, the first sliding shaft is provided with a second shaft clamp spring, one side of the first linear bearing is provided with the first shaft clamp spring, and the other side of the first linear bearing is provided with the second shaft clamp spring.

Optionally, the pressure plate is further provided with a protection pad, and the pressure plate is abutted to the other end of the extrusion unit through the protection pad.

Optionally, the extrusion force measurement assembly further includes a second bottom plate, a linear bearing mounting plate, a second sliding shaft and a second linear bearing, where the second bottom plate is mounted on the base, the linear bearing mounting plate is mounted on the second bottom plate, the second linear bearing is disposed through the linear bearing mounting plate, the second sliding shaft is disposed through the second linear bearing, the second sliding shaft is slidably disposed along the extrusion direction, and the movable plate is mounted on an end of the second sliding shaft.

Optionally, the extrusion force measurement assembly further includes a screw slider and a screw, the screw slider is disposed through the linear bearing mounting plate, the screw slider is provided with a threaded hole, the screw is engaged with and disposed through the threaded hole, and an end portion of the screw is abutted against the movable plate.

Optionally, a thrust bearing is provided at an end of the screw, and the screw is abutted against the movable plate through the thrust bearing.

Optionally, the screw is provided with a handle.

Optionally, a reinforcing plate is installed between the second base plate and the linear bearing mounting plate.

The cell stacking extrusion force measuring device provided by the utility model has the beneficial effects that: through fixed butt pressure sensor between fly leaf and pressure board to through a pressure board butt at one tip of extrusion unit, through fixed subassembly butt in another tip of extrusion unit, make pressure sensor through the distance change condition between fly leaf and the pressure board, indirectly measure the extrusion force that the electricity core received, satisfy the demand of whole detection, avoid appearing the phenomenon that can't make the reply in time when the pressure of extrusion electricity core is too big. The surface of the battery cell is extruded through the pressure plate, and the surface of the battery cell is not damaged. And, because the fixed setting of pressure sensor is between fly leaf and pressure board, can keep the detection position of relative unanimity, also can further promote the accuracy of detected value.

Drawings

FIG. 1 is a schematic perspective view of a cell stack squeeze force measuring device of the present utility model;

FIG. 2 is a top view of a cell stack squeeze force measurement device of the present utility model;

FIG. 3 is a front view of a cell stack compression force measuring device of the present utility model;

FIG. 4 is a left side view of a cell stack squeeze force measurement device of the present utility model;

fig. 5 is a partial enlarged view at a in fig. 3.

In the figure:

1. a base; 101. a first base plate; 102. a limiting plate; 103. a raising plate; 104. an insulating pad;

2. extruding the force measuring assembly; 201. a second base plate; 202. a linear bearing mounting plate; 203. a second sliding shaft; 204. an axial limiting member; 205. a second linear bearing; 206. a reinforcing plate; 207. a screw rod sliding block; 208. a screw rod; 209. a handle; 210. a thrust bearing; 211. a thrust bearing holder; 212. a clamp spring for a third shaft; 213. a movable plate; 214. a first linear bearing; 215. a first sliding shaft; 216. a clamping spring for the first shaft; 217. a second shaft uses a clamping spring; 218. a pressure plate; 219. a pressure sensor; 220. a backing plate;

3. a fixing assembly; 301. a third base plate; 302. reinforcing ribs; 303. a limit mounting plate; 304. a backing plate.

Detailed Description

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The following describes a cell stack extrusion force measuring device provided by the present utility model with reference to fig. 1 to 5.

As shown in fig. 1, the cell stack extrusion force measurement device comprises a base 1, a fixing component 3 and an extrusion force measurement component 2, wherein the fixing component 3 and the extrusion force measurement component 2 are fixedly arranged on the base 1, and a plurality of cells are abutted between the fixing component 3 and the extrusion force measurement component 2.

Be provided with the constraint structure on the base 1, as shown in fig. 2, 3, the constraint structure includes first bottom plate 101, and the both sides of first bottom plate 101 all are provided with limiting plate 102 along the extrusion direction, and first bottom plate 101 and two limiting plates 102 form a slot-like structure, and a plurality of electric core can be followed the extrusion direction, arrange in slot-like structure and form an extrusion unit. Optionally, in this embodiment, a raising component is further disposed under the first bottom plate 101, where the raising component includes a plurality of raising boards 103, so that the pressing unit, the fixing component 3 and the pressing force measuring component 2 are located at corresponding heights, so that measurement of the pressing force is convenient, and accuracy of the detection value is improved.

The extrusion force measurement assembly 2 includes a pressure plate 218 and a movable plate 213, the pressure plate 218 is slidably connected to the movable plate 213 along the extrusion direction, the movable plate 213 and the pressure plate 218 are movably disposed along the extrusion direction, a pressure sensor 219 is fixedly disposed between the movable plate 213 and the pressure plate 218, and the pressure sensor 219 is abutted between the movable plate 213 and the pressure plate 218, so that a corresponding detection value can be given corresponding to the distance between the movable plate 213 and the pressure plate 218.

In use, the fixed assembly 3 is illustratively in abutment with one end of the compression unit in the compression direction, and the movable plate 213 drives the pressure plate 218 in abutment with the other end of the compression unit. As the movable plate 213 pushes the pressure plate 218 to squeeze the battery cell, the pressure sensor 219 abutting between the movable plate 213 and the pressure plate 218 continuously receives pressure due to the reduced distance between the two, thereby meeting the requirement of whole-course detection. Also, since the pressure sensor 219 is fixedly provided between the movable plate 213 and the pressure plate 218, a relatively uniform detection position can be maintained. Optionally, the pressure plate 218 is further provided with a guard plate 220, and the pressure plate 218 is abutted to the other end of the extrusion unit through the guard plate 220, so that the surface of the battery cell can be further protected, and the surface of the battery cell is prevented from being damaged.

Through fixed butt pressure sensor 219 between fly leaf 213 and pressure board 218 to through pressure board 218 butt at one end of extrusion unit, through fixed subassembly 3 butt in the other end of extrusion unit, make pressure sensor 219 through the change condition of the distance between fly leaf 213 and the pressure board 218, indirectly measure the extrusion force that the electric core received, satisfy the demand of whole journey detection, avoid appearing extruding the phenomenon that can't in time make the reply when the pressure of electric core is too big. The surface of the cell is pressed by the pressure plate 218 without damage to the cell surface. Further, since the pressure sensor 219 is fixedly provided between the movable plate 213 and the pressure plate 218, a relatively uniform detection position can be maintained, and the accuracy of the detection value can be further improved.

Referring to fig. 3 and 5, the extrusion force measuring assembly 2 includes a second base plate 201, a linear bearing mounting plate 202, a second sliding shaft 203, and a second linear bearing 205, the second base plate 201 is mounted on the base 1, the linear bearing mounting plate 202 is mounted on the second base plate 201, the second linear bearing 205 is disposed through the linear bearing mounting plate 202, the second sliding shaft 203 is disposed through the second linear bearing 205, the second sliding shaft 203 is disposed in a sliding manner along the extrusion direction, and the movable plate 213 is mounted on an end portion of the second sliding shaft 203. Through linear bearing mounting panel 202, second sliding shaft 203 and second linear bearing 205 for fly leaf 213 can follow the extrusion direction activity setting, and then conveniently promote pressure plate 218 through fly leaf 213, extrude and the dynamometry to the electric core. Optionally, as shown in fig. 3, a reinforcing plate 206 is installed between the second base plate 201 and the linear bearing mounting plate 202, which can improve the structural strength of the extrusion force-measuring assembly 2.

Specifically, in the present embodiment, the extrusion force measuring assembly 2 further includes a screw slider 207 and a screw 208, the screw slider 207 is provided with a screw hole through which the screw slider 207 is inserted in the linear bearing mounting plate 202, the screw 208 is engaged with and inserted in the screw hole, and an end portion of the screw 208 abuts against the movable plate 213. The screw 208 is provided with a handle 209, and by rotating the handle 209, the screw is axially moved with respect to the screw hole, thereby pushing the movable plate 213 to slide in the pressing direction.

Preferably, the end of the screw rod 208 is provided with a thrust bearing 210, one side of the movable plate 213 away from the pressure sensor 219 is provided with a thrust bearing fixing seat 211, the screw rod 208 is abutted to the movable plate 213 through the thrust bearing 210 and the thrust bearing fixing seat 211, friction between the end of the screw rod 208 and the movable plate 213 is prevented, and the screw rod 208 or the movable plate 213 is damaged, so that accuracy of the pressure sensor 219 is affected. Optionally, the end of the screw 208 is provided with a third shaft clamp spring 212, and the third shaft clamp spring 212 abuts against the thrust bearing fixing seat 211, so that abrasion between the screw 208 and the thrust bearing fixing seat 211 can be further prevented.

With continued reference to fig. 5, the movable plate 213 is provided with a first linear bearing 214, and a first sliding shaft 215 is slidably provided in the first linear bearing 214, and the first sliding shaft 215 is fixedly connected to the pressure plate 218, so that the pressure plate 218 is slidably connected to the movable plate 213 along the extrusion direction. Preferably, the first sliding shaft 215 is provided with a first shaft snap spring 216 and a second shaft snap spring 217, one side of the first linear bearing 214 is provided with the first shaft snap spring 216, and the other side of the first linear bearing 214 is provided with the second shaft snap spring 217. The first shaft clamp spring 216 is in contact with the pressure plate 218, so that the first sliding shaft 215 and the pressure plate 218 can be prevented from sliding relatively; the second shaft clamp spring 217 can be brought into contact with the first linear bearing 214, and the first slide shaft 215 can be prevented from sliding off the first linear bearing 214.

Of course, in some other embodiments, only the first shaft clamp spring 216 or only the second shaft clamp spring 217 may be used, which is not specifically limited in the present utility model. Similarly, as shown in fig. 5, an axial stopper 204 may be provided at the end of the second sliding shaft 203 to prevent the second sliding shaft 203 from sliding off the second linear bearing 205.

As shown in fig. 4, the fixing assembly 3 includes a third base plate 301, reinforcing ribs 302, a limit mounting plate 303, and a tie plate 304, the limit mounting plate 303 is fixed to the third base plate 301 by the reinforcing ribs 302, and the tie plate 304 is fixed to the limit mounting plate 303. Preferably, in the present embodiment, the pad plate 304, the guard pad 220 and the above-mentioned limiting plate 102 are all made of insulating materials, and the insulating guard pad 104 is further disposed between the first bottom plate 101 and the battery cell, so that the first bottom plate 101 and the battery cell are all made of insulating materials, and the safety in the production process is further enhanced.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The electric core stacks extrusion force measurement device, its characterized in that includes:

the battery pack comprises a base (1), wherein a constraint structure is arranged on the base (1) and used for enabling a plurality of battery cells to be arranged along the extrusion direction, and the battery cells form an extrusion unit;

the fixing assembly (3), the said fixing assembly (3) is fixedly connected to the said base (1);

the extrusion force measurement assembly (2), the extrusion force measurement assembly (2) is fixedly connected to the base (1), the extrusion force measurement assembly (2) comprises a pressure plate (218) and a movable plate (213), the pressure plate (218) is slidably connected to the movable plate (213) along the extrusion direction, the movable plate (213) and the pressure plate (218) are movably arranged along the extrusion direction, and a pressure sensor (219) is fixedly abutted between the movable plate (213) and the pressure plate (218);

along the extrusion direction, the extrusion unit is provided with two ends, the fixed component (3) is abutted to one end of the extrusion unit, and the movable plate (213) drives the pressure plate (218) to be abutted to the other end of the extrusion unit.

2. The cell stack extrusion force measurement device according to claim 1, wherein the movable plate (213) is provided with a first linear bearing (214) in a penetrating manner, a first sliding shaft (215) is provided in the first linear bearing (214) in a sliding manner, and the first sliding shaft (215) is fixedly connected to the pressure plate (218).

3. The cell stack extrusion force measurement device according to claim 2, characterized in that the first sliding shaft (215) is provided with a first shaft snap spring (216), the first shaft snap spring (216) being in abutment with the pressure plate (218).

4. A cell stack extrusion force measuring device according to claim 3, characterized in that the first sliding shaft (215) is provided with a second shaft snap spring (217), that one side of the first linear bearing (214) is provided with the first shaft snap spring (216), and that the other side of the first linear bearing (214) is provided with the second shaft snap spring (217).

5. The cell stack extrusion force measuring device according to claim 2, characterized in that the pressure plate (218) is further provided with a backing plate (220), the pressure plate (218) being abutted against the other end of the extrusion unit by the backing plate (220).

6. The cell stack extrusion force measurement device according to claim 2, wherein the extrusion force measurement assembly (2) further comprises a second bottom plate (201), a linear bearing mounting plate (202), a second sliding shaft (203) and a second linear bearing (205), the second bottom plate (201) is mounted on the base (1), the linear bearing mounting plate (202) is mounted on the second bottom plate (201), the second linear bearing (205) is arranged through the linear bearing mounting plate (202), the second sliding shaft (203) is arranged through the second linear bearing (205), the second sliding shaft (203) is arranged in a sliding manner along the extrusion direction, and the movable plate (213) is mounted on the end portion of the second sliding shaft (203).

7. The cell stack extrusion force measurement device of claim 6, wherein the extrusion force measurement assembly (2) further comprises a screw slider (207) and a screw (208), the screw slider (207) is threaded through the linear bearing mounting plate (202), the screw slider (207) is provided with a threaded hole, the screw (208) is meshed with and threaded through the threaded hole, and an end of the screw (208) is abutted against the movable plate (213).

8. The cell stack extrusion force measurement device according to claim 7, characterized in that the end of the lead screw (208) is provided with a thrust bearing (210), the lead screw (208) being in abutment with the movable plate (213) through the thrust bearing (210).

9. The cell stack squeeze force measurement device of claim 7, wherein the lead screw (208) is mounted with a handle (209).

10. The cell stack squeeze force measurement device of claim 6, wherein a stiffener plate (206) is mounted between the second base plate (201) and the linear bearing mounting plate (202).