WO2021093084A1

WO2021093084A1 - Battery module grouping clamp and usage method

Info

Publication number: WO2021093084A1
Application number: PCT/CN2019/126042
Authority: WO
Inventors: 张训银; 江吉兵; 侯永坤; 范丽; 刘金成
Original assignee: 惠州亿纬锂能股份有限公司
Priority date: 2019-11-14
Filing date: 2019-12-17
Publication date: 2021-05-20
Also published as: CN110808401B; CN110808401A

Abstract

A battery module grouping clamp and a usage method, the battery module grouping clamp comprising a clamp body (1), a first positioning member (2), and a second positioning member (3), the clamp body (1) comprising a bottom plate (11), two side pressing plates, and two clamping mechanisms (14), a through hole being disposed in the middle of the bottom plate (11), the two side pressing plates being arranged on two opposite side edges of the bottom plate (11), and the two clamping mechanisms (14) respectively being arranged at the two ends of the side pressing plates, the first positioning member (2) comprising a first positioning plate (21) and a plurality of first positioning pins (22), and the second positioning member (3) comprising a second positioning plate (31) and a plurality of second positioning pins (32).

Description

Battery mold assembly fixture and method of use

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office with application number 201911115356.9 on November 14, 2019. The entire content of the above application is incorporated into this application by reference.

Technical field

This application relates to the technical field of battery manufacturing, for example, to a battery mold assembly clamp and a method of use.

Background technique

For pure electric vehicles, the energy density and space utilization of the battery system play a vital role in the performance of the vehicle. A large part of the energy density and space utilization rate of the battery system is reflected in the battery module, and the relatively high energy density and space utilization rate also put forward high requirements for the grouping of modules and fixtures.

At present, the power battery modules on the market usually adopt the method of fixing one end of the module and pressing and clamping at the other end, and form a group after reaching a certain size. This method is suitable for modules with low energy density and small size. Large modules have a large number of cells and a longer length. Usually, a fixing plate is arranged in the middle of the cells to provide additional support and connection points to improve the overall structural strength of the cells after they are grouped. The module will not be deformed due to its too large length during transportation and installation. Therefore, the existing module fixture cannot satisfy the group work of a large module with a fixed plate in the middle.

Summary of the invention

The present application provides a battery module assembly clamp, which can be used for the assembly of large-scale battery modules with a fixed plate in the middle. The forces on each part of the module are balanced, and the module size deviation on both sides of the fixed plate is small.

The present application also provides a method for using the battery mold assembly clamp, which has high assembly accuracy and good assembly quality.

On the one hand, the present application provides a battery module assembly clamp, including a clamp body, a first positioning member, and a second positioning member. The clamp body includes a bottom plate, two side pressure plates, and two clamping mechanisms. A through hole is opened, the two side pressure plates are detachably arranged on two opposite sides of the bottom plate, the two clamping mechanisms are respectively arranged on both ends of the side pressure plate, and the first positioning member It includes a first positioning plate and a plurality of first positioning pins arranged on one side of the first positioning plate, and the second positioning member includes a second positioning plate and a plurality of second positioning pins arranged on one side of the second positioning plate , The two ends of the first positioning plate can be fixed on the side of the bottom plate away from the side pressure plate, so that a plurality of the first positioning pins pass through the through holes, and the two ends of the second positioning plate can be They are respectively fixed on the tops of the two side pressure plates, so that a number of the second positioning pins extend into the gap between the two side pressure plates.

The battery mold assembly fixture further includes a first pressing plate and a second pressing plate, the first pressing plate includes a first plate body and a first protrusion, and the second pressing plate includes a second plate body and a second protrusion. The first plate body can be connected to the side of the bottom plate away from the side pressure plate, so that the first protrusion passes through the through hole, and the second plate body can be connected to the top of the side pressure plate, The second convex block extends between the two side pressure plates and is opposite to the first convex block.

Each of the first bump and the second bump includes a first part and a second part that are spaced apart, a groove structure is formed between the first part and the second part, the first positioning plate and the The second positioning plate may be arranged in the groove structure.

The two clamping mechanisms are provided with a pressing plate, the pressing plate is arranged perpendicular to the bottom plate, the pressing plate is connected with the driving mechanism and is formed in the gap between the two side pressing plates Reciprocating linear motion.

A pressure gauge is arranged on the squeeze plate.

The number of the first positioning pin and the second positioning pin is at least three.

On the other hand, this application provides a method for using a battery module assembly fixture, which includes the following steps:

S1. Provide parts and components of the battery module, including several batteries, upper cover, lower cover, two side plates, two end plates and middle fixing plate;

S2. Install the first positioning member on one side of the bottom plate, and install a side pressure plate on the other side of the bottom plate;

S3. Assemble the middle fixing plate to the first positioning pin of the first positioning member, and place a number of the battery cells on both sides of the middle fixing plate to form a first battery cell group and a second battery cell group. Battery pack

S4. The end plate is fixedly connected to the cell located at the outermost side of the first cell group or the second cell group;

S5. Install another side pressure plate on the bottom plate, so that the second positioning member is installed on the two side pressure plates, and the second positioning pin is inserted into the middle fixing plate;

S6. Move the squeezing plate toward the end plate and squeeze the end plate until the set pressure is reached, and the first battery cell group and the second battery cell group reach the set volume;

S7. Remove the first positioning member, make the lower cover plate adhere to the first battery cell group and the second battery cell group, reinstall the first positioning member, and install the first pressure plate so that the The lower cover plate presses the first battery cell group and the second battery cell group;

S8. Remove the second positioning member, make the upper cover plate adhere to the first battery cell group and the second battery cell group, reinstall the second positioning member, and install the second pressure plate so that the The upper cover plate presses the first battery cell group and the second battery cell group;

S9. Remove the first pressing plate and the first positioning member, weld the lower cover plate to the middle fixing plate and the end plate, and reinstall the first positioning member;

S10. Remove the second pressing plate and the second positioning member, and weld the upper cover plate, the middle fixing plate and the end plate to form a semi-finished module;

S11. Remove the first positioning member, separate the semi-finished module from the fixture body, and install two side plates on the semi-finished module to obtain the battery module.

A number of fixing holes are opened on the middle fixing plate, and both the first positioning pin and the second positioning pin are in interference fit with the fixing holes.

Both the lower cover plate and the upper cover plate are provided with openings for the first positioning pin or the second positioning pin to pass through.

The distance between the two side pressure plates is greater than the width of the upper cover plate, and the size of the through hole on the bottom plate is greater than the size of the lower cover plate.

The battery module assembly fixture of the present application includes a first positioning member and a second positioning member with positioning pins, which can be used for the assembly process of a large battery module with a middle fixing plate. The first positioning member and the second positioning member are respectively The middle fixing plate is fixed from the upper and lower directions, the fixing effect is good, and the installation and disassembly of the first positioning piece and the second positioning piece are very convenient. Both ends of the clamp are equipped with clamping mechanisms, so that the two parts of the module can be assembled. The force is balanced, the size deviation is small, and the group effect is good.

Description of the drawings

FIG. 1 is a three-dimensional schematic diagram of a battery module assembly fixture according to an embodiment of the application when matched with a battery module;

FIG. 2 is a three-dimensional schematic diagram of a battery module matched with the battery module assembly fixture of the embodiment of the present application;

Figure 3 is an exploded view of Figure 2.

In the figure:

1. Clamp body; 11. Bottom plate; 12. First side pressure plate; 13. Second side pressure plate; 14. Clamping mechanism; 141. Squeeze plate; 142. Pressure gauge; 2. First positioning part; 21. No. A positioning plate; 22, the first positioning pin; 3. the second positioning member; 31, the second positioning plate; 32, the second positioning pin; 4. the first pressing plate; 41, the first plate body; 42, the first protrusion 5, the second pressing plate; 51, the second plate body; 52, the second bump;

100, battery cell; 200, middle fixed plate; 300, lower cover plate; 400, upper cover plate; 500, end plate; 600, side plate.

Detailed ways

The technical solutions of the present application will be further described below in conjunction with the drawings and specific implementations.

In this application, unless expressly stipulated and defined otherwise, the "above" or "below" of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them. Moreover, the "above" of the first feature on the second feature includes the first feature directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The "below" of the first feature under the second feature includes the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.

As shown in Figure 1, the battery mold assembly fixture of this embodiment includes a fixture body 1, a first positioning member 2 and a second positioning member 3. The fixture body 1 includes a bottom plate 11, a first side pressure plate 12, and a second side pressure plate 13. And two clamping mechanisms 14, the bottom plate 11 is provided with a through hole in the middle, the first side pressure plate 12 and the second side pressure plate 13 are detachably arranged on two opposite sides of the bottom plate 11, and the two clamping mechanisms 14 are respectively arranged on At both ends of the first side pressing plate 12 and the second side pressing plate 13, the first positioning member 2 includes a first positioning plate 21 and a plurality of first positioning pins 22 arranged on one side of the first positioning plate 21, and the second positioning member 3 includes a first positioning plate 21. Two positioning plates 31 and a number of second positioning pins 32 arranged on one side of the second positioning plate 31. Both ends of the first positioning plate 21 can be fixed on the side of the bottom plate 11 away from the first side pressure plate 12 and the second side pressure plate 13 , Make a number of first positioning pins 22 pass through the through holes opened on the bottom plate 11, the two ends of the second positioning member 3 can be respectively fixed on the top of the first side pressure plate 12 and the second side pressure plate 13, so that a number of second positioning pins 32 extends into the gap between the first side pressure plate 12 and the second side pressure plate 13.

2 and 3, the battery module assembly fixture of this embodiment includes a first positioning member 2 and a second positioning member 3 with positioning pins, which can be used to install a large battery module with a middle fixing plate 200 In the grouping process, the first positioning member 2 and the second positioning member 3 fix the middle fixing plate 200 from the upper and lower directions respectively, the fixing effect is good, and the installation and disassembly of the first positioning member 2 and the second positioning member 3 are very convenient , Both ends of the clamp are equipped with clamping mechanisms 14 to make the two parts of the battery cell group of the module balanced in force, small in size deviation, and good in grouping effect.

In some embodiments, the battery mold assembly fixture further includes a first pressing plate 4 and a second pressing plate 5. The first pressing plate 4 includes a first plate body 41 and a first protrusion 42, and the second pressing plate 5 includes a second plate body 51. And the second bump 52, the first plate body 41 can be connected to the side of the bottom plate 11 away from the first side pressing plate 12 and the second side pressing plate 13, so that the first bump 42 passes through the through hole and presses the battery module On the lower surface, the second plate body 51 can be connected to the tops of the first side pressure plate 12 and the second side pressure plate 13, so that the second protrusion 52 extends between the first side pressure plate 12 and the second side pressure plate 13 and is connected to the first side pressure plate 12 and the second side pressure plate 13 The bumps 42 are opposite to each other and are used to press the upper surface of the battery module. When the lower cover plate 300 and the upper cover plate 400 of the battery module are connected to the battery cells 100 by bonding, the first pressure plate 4 can press the lower cover plate 300 on the plurality of battery cells 100, and the second pressure plate 5 can The upper cover plate 400 is pressed tightly on the plurality of cells 100, so that the glue is evenly distributed, and the flat and firm adhesion of the lower cover plate 300 and the upper cover plate 400 is ensured.

The first bump 42 and the second bump 52 each include a first part and a second part spaced apart, a groove structure is formed between the first part and the second part, and the first positioning plate 21 and the second positioning plate 31 can be arranged on Inside the groove structure. The first positioning plate 21 and the second positioning plate 31 make the middle fixing plate 200 in a fixed position, which play an important role in maintaining the group form and force balance of the module. Therefore, it is necessary to maintain at least One of them is in a connected state with the middle fixing plate 200 to prevent the middle fixing plate 200 from being displaced. When the first pressing plate 4 and the second pressing plate 5 are installed, the module is still in an unfinished assembled form, so it is necessary to provide the first pressing plate 4 and the second pressing plate 5 to accommodate the first positioning plate 21 and the second positioning plate The structure of 31 enables the first positioning member 2 and the first pressing plate 4 to function at the same time, and the second positioning member 3 and the second pressing plate 5 to function at the same time.

The two clamping mechanisms 14 are each provided with a pressing plate 141, the pressing plate 141 is arranged perpendicular to the bottom plate 11, the pressing plate 141 is connected with the driving mechanism and is in the gap between the first side pressure plate 12 and the second side pressure plate 13 The inner reciprocating linear motion is performed to realize simultaneous squeezing of the first battery cell group and the second battery cell group on both sides of the middle fixing plate 200.

A pressure gauge 142 is provided on the squeeze plate 141, so the current pressure value can be read out, and the pressure can be accurately adjusted until the set pressure value is reached.

The number of the first positioning pins 22 and the second positioning pins 32 is at least three to ensure the stable fixation of the middle fixing plate 200.

The embodiment of the present application also provides a method for using the battery module assembly clamp, which includes the following steps:

S1. Provide parts and components of the battery module, including a number of battery cells 100, a central fixed plate 200, a lower cover plate 300, an upper cover plate 400, two end plates 500 and two side plates 600;

S2. Install the first positioning member 2 on one side of the bottom plate 11, and install the first side pressure plate 12 on the other side of the bottom plate 11;

S3. Assemble the middle fixing plate 200 to the first positioning pin 22 of the first positioning member 2, and place a number of cells 100 on both sides of the middle fixing plate 200 to form a first battery cell group and a second battery cell group ；

S4. The end plate 500 is fixedly connected to the cell 100 located at the outermost side of the first cell group or the second cell group;

S5. Install the second side pressure plate 13 on the bottom plate 11, so that the second positioning member 3 is installed on the first side pressure plate 12 and the second side pressure plate 13, and the second positioning pin 32 is inserted into the middle fixing plate 200;

S6. Move the squeezing plate 141 toward the end plate 500 and squeeze the end plate 500 until the set pressure is reached, and the first battery cell group and the second battery cell group reach the set volume;

S7. Remove the first positioning member 2, make the lower cover plate 300 adhere to the first battery cell group and the second battery cell group, reinstall the first positioning member 2, and install the first pressing plate 4 so that the lower cover plate 300 is pressed tightly. A battery cell group and a second battery cell group;

S8. Remove the second positioning member 3, make the upper cover plate 400 adhere to the first battery cell group and the second battery cell group, reinstall the second positioning member 3, and install the second pressing plate 5 so that the upper cover plate 400 is pressed tightly. A battery cell group and a second battery cell group;

S9. Remove the first pressing plate 4 and the first positioning member 2, weld the lower cover plate 300 to the middle fixing plate 200 and the end plate 500, and reinstall the first positioning member 2;

S10. Remove the second pressing plate 5 and the second positioning member 3, and weld the upper cover plate 400 with the middle fixed plate 200 and the end plate 500 to form a semi-finished module;

S11. Remove the first positioning member 2 to separate the semi-finished module from the fixture body 1, and install two side plates 600 on the semi-finished module to obtain a battery module.

The middle fixing plate 200, the bottom plate 11 and the first side pressing plate 12 first provide a reference plane for placing a number of cells 100. The first positioning member 2 is used to fix the middle fixing plate 200. After the placing of the cells 100 is completed, pass After installing the second side pressure plate 13 and the second positioning member 3, several cells 100 have been positioned in a direction parallel to the middle fixing plate 200. After the end plate 500 is installed, the end plate 500 can be pressed to complete the first The squeezing work of the battery cell group and the second battery cell group enables the first battery cell group and the second battery cell group to reach the target pressure and volume state, so that the lower cover plate 300 and the upper cover plate 400 can be installed again. The sizes of the lower cover plate 300 and the upper cover plate 400 are determined for the sizes of the several cells 100 after the extrusion is completed, and therefore cannot be installed before the extrusion operation is completed. After the first pressing plate 4 and the second pressing plate 5 are used to compact the lower cover plate 300 and the upper cover plate 400, the welding work can be carried out, so that the lower cover plate 300 and the upper cover plate 400 are welded to the middle fixed plate 200 and the end plate 500 , Through the restriction of the lower cover plate 300 and the upper cover plate 400, the expansion force of the first battery cell group and the second battery cell group is limited, and the volume of the first battery cell group and the second battery cell group are kept unchanged, and the middle part is fixed The plate 200 will not be displaced either.

The method of using the battery mold assembly clamp of this embodiment ensures that during the assembly process of the battery module, the middle fixing plate 200 is always in a stable and unchanging position, and each battery cell 100 does not always move after the extrusion is completed. The precision is high, and the quality of the group is good.

The middle fixing plate 200 is provided with a number of fixing holes, and both the first positioning pin 22 and the second positioning pin 32 are in interference fit with the fixing holes, thereby ensuring the stability of the middle fixing plate 200.

Both the lower cover 300 and the upper cover 400 are provided with openings for the first positioning pin 22 or the second positioning pin 32 to pass through, so even if the lower cover 300 and the upper cover 400 are installed, the installation can still be continued The first positioning member 2 and the second positioning member 3 ensure that the position of the middle fixing plate 200 remains unchanged.

The distance between the first side pressing plate 12 and the second side pressing plate 13 is greater than the width of the upper cover plate 400, and the size of the through hole on the bottom plate 11 is larger than the size of the lower cover plate 300, so that the lower cover plate 300 and the upper cover plate 400 can be The installation is smooth when only the first positioning member 2 or the second positioning member 3 is removed, which facilitates group operation.

In the description of this specification, the description with reference to the term "optional" means that the specific feature, structure, material or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

Claims

A battery mold assembly clamp includes a clamp body, a first positioning member and a second positioning member. The clamp body includes a bottom plate, two side pressure plates and two clamping mechanisms. The middle of the bottom plate is provided with a through hole. The side pressure plate is detachably arranged on two opposite sides of the bottom plate, the two clamping mechanisms are respectively arranged at both ends of the side pressure plate, and the first positioning member includes a first positioning plate and A number of first positioning pins are provided on one side of the first positioning plate, and the second positioning member includes a second positioning plate and a number of second positioning pins provided on one side of the second positioning plate. The two ends of the plate can be fixed on the side of the bottom plate away from the side pressure plate, so that a plurality of the first positioning pins pass through the through holes, and the two ends of the second positioning plate can be respectively fixed on two On the top of the side pressure plate, a number of the second positioning pins extend into the gap between the two side pressure plates.
The battery mold assembly jig according to claim 1, further comprising a first pressing plate and a second pressing plate, the first pressing plate includes a first plate body and a first bump, and the second pressing plate includes a second plate body and The second protrusion, the first plate body can be connected to the side of the bottom plate away from the side pressure plate, so that the first protrusion passes through the through hole, and the second plate body can be connected to the side pressure plate. The top of the side pressure plate is connected so that the second protrusion extends between the two side pressure plates and is opposite to the first protrusion.
The battery mold assembly jig according to claim 2, wherein the first bump and the second bump each include a first part and a second part arranged at intervals, the first part and the second part A groove structure is formed therebetween, and the first positioning plate and the second positioning plate can be arranged in the groove structure.
The battery mold assembly fixture according to claim 1, wherein the two clamping mechanisms are provided with a pressing plate, the pressing plate is arranged perpendicular to the bottom plate, and the pressing plate is connected to the driving mechanism. Connecting and reciprocating linear motion in the gap between the two side pressure plates.
The battery mold assembly jig according to claim 4, wherein a pressure gauge is provided on the pressing plate.
The battery module assembly fixture according to claim 1, wherein the number of the first positioning pin and the second positioning pin is at least three.
A method for using battery mold assembly fixtures includes the following steps:

S1. Provide parts and components of the battery module, including several batteries, upper cover, lower cover, two side plates, two end plates and middle fixing plate;

S2. Install the first positioning member on one side of the bottom plate, and install a side pressure plate on the other side of the bottom plate;

S3. Assemble the middle fixing plate to the first positioning pin of the first positioning member, and place a number of the battery cells on both sides of the middle fixing plate to form a first battery cell group and a second battery cell group. Battery pack

S4. The end plate is fixedly connected to the cell located at the outermost side of the first cell group or the second cell group;

S5. Install another side pressure plate on the bottom plate, so that the second positioning member is installed on the two side pressure plates, and the second positioning pin is inserted into the middle fixing plate;

S6. Move the squeezing plate toward the end plate and squeeze the end plate until the set pressure is reached, and the first battery cell group and the second battery cell group reach the set volume;

S7. Remove the first positioning member, make the lower cover plate adhere to the first battery cell group and the second battery cell group, reinstall the first positioning member, and install the first pressure plate so that the The lower cover plate presses the first battery cell group and the second battery cell group;

S8. Remove the second positioning member, make the upper cover plate adhere to the first battery cell group and the second battery cell group, reinstall the second positioning member, and install the second pressure plate so that the The upper cover plate presses the first battery cell group and the second battery cell group;

S9. Remove the first pressing plate and the first positioning member, weld the lower cover plate to the middle fixing plate and the end plate, and reinstall the first positioning member;

S10. Remove the second pressing plate and the second positioning member, and weld the upper cover plate, the middle fixing plate and the end plate to form a semi-finished module;

S11. Remove the first positioning member, separate the semi-finished module from the fixture body, and install two side plates on the semi-finished module to obtain the battery module.
The method of using the battery module assembly clamp according to claim 7, wherein a plurality of fixing holes are opened on the middle fixing plate, and the first positioning pin and the second positioning pin are both passing through the fixing hole. Surplus fit.
The method of using the battery module assembly clamp according to claim 7, wherein the lower cover plate and the upper cover plate are both provided with holes for the first positioning pin or the second positioning pin to pass through. Open holes.
The method of using the battery mold assembly jig according to claim 7, wherein the distance between the two side pressing plates is greater than the width of the upper cover plate, and the size of the through hole on the bottom plate is larger than that of the lower cover The size of the board.