CN219457880U

CN219457880U - Insulating bracket for battery cells and battery module

Info

Publication number: CN219457880U
Application number: CN202320807930.2U
Authority: CN
Inventors: 徐爱华; 陈涛
Original assignee: Phylion Battery Co Ltd
Current assignee: Phylion Battery Co Ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-08-01
Anticipated expiration: 2033-04-12

Abstract

The utility model relates to the technical field of lithium battery manufacturing, in particular to an insulating support and a battery module between electric cores, comprising a first support and a second support which are symmetrically arranged on two sides of the electric cores, wherein the first support and the second support comprise: the bracket body comprises a first clamping plate and a second clamping plate positioned at two ends of the first clamping plate, the first clamping plate and the second clamping plate form a -shaped flat plate, and the bracket body is clamped between the battery cores; the limiting plate is perpendicular to the plane where the bracket body is positioned and is connected to the outer side of the first clamping plate; the bolt is perpendicular to the plane where the bracket body is arranged on the limiting plate, and comprises a positioning rib and a positioning hole, and the positioning hole is matched with the positioning rib in size. According to the utility model, through split type arrangement, the battery cell has a certain degree of displacement freedom, so that the expanding force can be uniformly transmitted to the whole module when the battery cell swells.

Description

Insulating bracket for battery cells and battery module

Technical Field

The utility model relates to the technical field of lithium battery manufacturing, in particular to an insulating bracket for battery cells and a battery module.

Background

The battery module is characterized in that a plurality of electric cores are sequentially arranged, the electric cores are fixed in a module structural member, and poles of the electric cores are connected together by using a busbar; in the voltage discharge process, the temperature in the battery module is necessarily increased; therefore, in the normal temperature circulation, the high temperature circulation or the high temperature shelving process of the battery module, the electrolyte in the battery cell can be oxidized and decomposed to generate gas so as to cause the battery cell to bulge at different degrees. Adjacent two cells are pressed against each other, and the pressing force is transmitted between the plurality of cells, thereby causing the battery module to have a risk of damage.

During assembly, in order to ensure the reliability and stability of the battery pack, a bulge space is generally reserved between the battery cells. The main method adopted by the method is as follows: and bulge holes are formed in the isolating pieces between the adjacent cells so as to form a certain gap between the cells and the middle part of the cells.

However, in this way, on one hand, there is only a bulge space in the thickness direction of the battery cell, and the battery cell expands around during bulge, and on the other hand, the distance between the spacers is fixed, so that the internal stress of the battery module at the bulge battery cell is larger, and the risk of damage is high.

Disclosure of Invention

Therefore, the utility model aims to overcome the defect that a cell spacer in the prior art cannot meet the swelling requirement of a battery module, and provides an insulating bracket for cells and the battery module.

In order to solve the technical problems, the utility model provides an insulating bracket for battery cells, which comprises a first bracket and a second bracket symmetrically arranged on two sides of the battery cells, wherein the first bracket and the second bracket comprise:

the bracket body comprises a first clamping plate and second clamping plates positioned at two ends of the first clamping plate, wherein the first clamping plate and the second clamping plate form a -shaped flat plate, and the bracket body is clamped between the battery cells;

the limiting plate is perpendicular to the plane where the bracket body is located and is connected to the outer side of the first clamping plate;

the bolt, the bolt perpendicular to support body place plane install in on the limiting plate, the bolt includes locating rib and locating hole, the size phase-match of locating hole and locating rib.

In one embodiment of the utility model, the sum of the widths of the first and second brackets is less than the width of the cell.

In one embodiment of the utility model, a plurality of bolts are arranged on the limiting plate.

In one embodiment of the utility model, the positioning rib is cylindrical, and the positioning hole is a cylindrical hole matched with the positioning rib.

In one embodiment of the present utility model, the positioning rib is prismatic, and the positioning hole is a prismatic hole matched with the positioning rib.

The utility model also provides a battery module, comprising:

the battery cores are arranged side by side along the thickness direction;

the battery cells are accommodated in the box body;

the integrated cover plate comprises a cover plate body and coamings, the cover plate body is a flat plate with the size matched with the battery cell, the battery cell is clamped in the middle by the two cover plate bodies, and the coamings wrap the battery cell along the periphery of the cover plate body;

the plurality of insulating supports are arranged between any two adjacent electric cores, and the coaming is provided with positioning ribs or positioning holes matched with the adjacent bolts.

In one embodiment of the utility model, the positioning rib is half-inserted into the positioning hole.

In one embodiment of the present utility model, an adjustment module is disposed in the case, and the adjustment module includes:

the baffle is arranged between the integral cover plate and the box body, and is provided with a first surface matched with the integral cover plate and a second surface which is opposite to the first surface and is obliquely arranged;

the plugboard is arranged between the baffle and the box body, and is provided with a third surface matched with the second surface and a fourth surface opposite to the third surface and matched with the inner side surface of the box body.

In one embodiment of the utility model, the plugboard is provided with a plurality of first fixing holes, the box body is provided with second fixing holes matched with the first fixing holes, and the second fixing holes are kidney-shaped holes.

In one embodiment of the utility model, the box body is provided with a convex rib avoiding the bolt.

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

according to the insulating bracket, a certain degree of displacement freedom exists in the battery cell through split type arrangement, so that the expansion force can be uniformly transmitted to the whole module when the battery cell is inflated;

according to the battery module, the insulating support is arranged, so that the internal stress of the battery core is uniform during inflation, and the pre-clamping process can be completed according to the box body by adjusting the arrangement of the module, and the battery module can adapt to module schemes in different size ranges.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which

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

FIG. 2 is a perspective view of a first bracket of the present utility model;

FIG. 3 is a top view of a first bracket of the present utility model;

FIG. 4 is a schematic illustration of the use of an insulating support of the present utility model;

FIG. 5 is an enlarged view of the structure of area A of FIG. 2 in accordance with the present utility model;

fig. 6 is a schematic view of a battery module according to the present utility model;

fig. 7 is an exploded view of the battery module according to the present utility model;

FIG. 8 is a schematic view of the unitary cover plate of the present utility model;

FIG. 9 is an enlarged view of the structure of area B of FIG. 3 in accordance with the present utility model;

FIG. 10 is a schematic diagram of an adjustment module of the present utility model;

FIG. 11 is a front cross-sectional view of an adjustment module of the present utility model;

fig. 12 is a top cross-sectional view of an adjustment module of the present utility model.

Reference numerals:

10. an insulating support; 11. a first bracket; 111. a bracket body; 111a, a first clamping plate; 111b, a second clamping plate; 112. a limiting plate; 113. a plug pin; 114. positioning ribs; 115. positioning holes; 12. a second bracket; 13. an accommodation space;

20. a battery cell;

30. a case; 31. convex ribs;

40. an integral cover plate; 41. a cover plate body; 42. coaming plate;

50. an adjustment module; 51. a baffle; 511. a first surface; 512. a second surface; 52. inserting plate; 521. a third surface; 522. a fourth surface; 53. and a second fixing hole.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

Referring to fig. 1, a schematic overall structure of an embodiment of an insulating holder for cells according to the present utility model is shown. The insulating support 10 of the present utility model includes the first support 11 and the second support 12 symmetrically disposed at both sides of the battery cell 20, and by disposing the insulating support 10 in two parts, the first support 11 and the second support 12 can be separated to both sides when the battery cell 20 bulges in the width direction, so that the battery cell 20 is not excessively pressed. Specifically, according to an embodiment of the present utility model, the first bracket 11 and the second bracket 12 may include: bracket body 111, limiting plate 112 and bolt 113.

Referring to fig. 2, the bracket body 111 includes a first clamping plate 111a and second clamping plates 111b located at both ends of the first clamping plate 111a, the first clamping plate 111a and the two second clamping plates 111b are integrally formed into a -shaped plate, and the bracket body 111 is clamped between the battery cells 20. The two bracket bodies 111 form rectangular frames between the battery cells 20, and the two adjacent battery cells 20 are insulated and separated, so that the arrangement of the battery cells 20 can be more compact without worrying about the risk of short circuit failure caused by faults in the charge and discharge processes of the battery cells 20. Because the center of the two bracket bodies 111 is hollowed out, a bulge gap is reserved for the battery cell 20, and the damage to the battery module caused by bulge of the battery cell 20 is avoided.

Referring to fig. 2 and 3, a limiting plate 112 is disposed perpendicular to a plane of the bracket body 111, and the limiting plate 112 is connected to an outer side of the first clamping plate 111 a. Since the limiting plate 112 is perpendicular to the bracket body 111, the top-view cross section of the first bracket 11 is T-shaped, the accommodating space 13 is formed between two adjacent insulating brackets 10, and since the battery cell 20 is rectangular, the accommodating space 13 is matched with the shape of the battery cell 20, and the limiting plate 112 abuts against the side end face of the battery cell 20, so that the position of the battery cell 20 in the width direction is limited, and the battery cell 20 is isolated from the housing in an insulating manner. When the battery cell 20 bulges, the two ends of the width direction of the battery cell 20 are propped against the limiting plate 112, and the first bracket 11 and the second bracket 12 are arranged in a separated mode, so that the first bracket 11 and the second bracket 12 move to two sides, and the expansion pressure of the battery module in the width direction is uniform.

The limiting plate 112 is further provided with a plug 113, the plug 113 is mounted on the limiting plate 112 perpendicular to the plane of the bracket body 111, and the plug 113 is used for combining a plurality of insulating brackets 10 into a whole. On one hand, the arrangement of the battery cells 20 is ensured to be more orderly, and on the other hand, the arrangement of the number of the battery cells 20 in the battery module is more flexible. When a larger number of battery cells 20 are required to be arranged, only the corresponding number of first brackets 11 and second brackets 12 are required to be added, all the brackets are not required to be replaced, and when a smaller number of battery cells 20 are required to be arranged, the corresponding number of first brackets 11 and second brackets 12 are required to be removed. The latch 113 includes a positioning rib 114 and a positioning hole 115, and the positioning hole 115 is matched with the positioning rib 114 in size. In the adjacent two insulating holders 10, the positioning ribs 114 can be inserted into the positioning holes 115 and can move along the length direction of the positioning holes 115. Because the positioning ribs 114 are movably matched with the positioning holes 115, when the battery cells 20 bulge, the corresponding insulating supports 10 can be opened to the two sides of the thickness of the battery cells 20 due to stress, the positioning ribs 114 move in the positioning holes 115, and the gaps between the two insulating supports 10 are increased while the insulating supports 10 are ensured to be connected. And other battery cells 20 can also move under the action of the expansion force, so that the expansion pressure born by the battery module is relatively uniform.

Referring to fig. 4, in a preferred embodiment of the present utility model, the sum of the widths of the first and second brackets 11 and 12 is set to be smaller than the width of the battery cell 20. Therefore, when the first bracket 11 and the second bracket 12 are matched with the battery cells 20, a gap exists between the first bracket 11 and the second bracket 12, and heat generated by two adjacent battery cells 20 can be dissipated to the upper side or the lower side of the battery module through the gap, so that the heat dissipation effect of the battery module is improved.

In order to ensure the stability of the connection between the insulating holders 10, a plurality of pins 113 are provided on the limiting plate 112. And a plurality of bolts 113 are arranged along the length direction of the limiting plate 112, namely, a plurality of bolts 113 are arranged along the height direction of the battery cell 20, so that the connection stability of a plurality of first brackets 11 or second brackets 12 is ensured, and the situation that the distance between the upper ends of the first brackets 11 and the second brackets 12 is inconsistent with the distance between the lower ends of the first brackets 11 and the second brackets 12 due to the fact that the number of the bolts 113 is too small is avoided.

Referring to fig. 5, in order to facilitate processing, in the first embodiment of the present utility model, the positioning rib 114 is provided in a cylindrical shape, and the positioning hole 115 is a cylindrical hole that mates with the positioning rib 114. When the battery is assembled, the positioning ribs 114 of one of the first and second brackets 12 are inserted into the positioning holes 115 of the other first and second brackets 12, so that the two first brackets 11 and the two second brackets 12 are enclosed into the accommodating space 13, and the battery cell 20 is inserted into the accommodating space 13. Or one set of the first and second supports 12 is attached to one side of the battery cell 20, and the other set of the first and second supports 12 is attached to the other side of the battery cell 20, and simultaneously, the positioning ribs 114 are inserted into the positioning holes 115, so that the battery cell 20 is clamped between the two sets of the first and second supports 12.

In other embodiments of the present utility model, since the first bracket 11 and the second bracket 12 are both flat plates, and have a relatively small thickness and relatively low strength, the positioning rib 114 is configured as a prism, particularly a quadrangular prism, and the positioning hole 115 is a prism hole that cooperates with the positioning rib 114. Therefore, the positioning rib 114 can only move along the axial direction of the positioning hole 115 and cannot rotate in the positioning hole 115, so that the flexibility of the matching between the two first brackets 11 or the two second brackets 12 is further limited, and the deformation of the two first brackets 11 or the two second brackets 12 due to the bulge of the battery cells 20 is avoided.

Referring to fig. 6, a schematic view of the overall structure of the battery module according to the present utility model is shown. The battery module of the present utility model includes:

a plurality of battery cells 20, the battery cells 20 being arranged side by side in the thickness direction;

a case 30 in which a plurality of the battery cells 20 are accommodated in the case 30;

the integrated cover plate 40, wherein the integrated cover plate 40 comprises a cover plate body 41 and a surrounding plate 42, the cover plate body 41 is a flat plate with a size matched with the battery cell 20, the battery cell 20 is clamped in the middle by the two cover plate bodies 41, and the surrounding plate 42 wraps the battery cell 20 along the periphery of the cover plate body 41;

the insulating supports 10 are arranged between any two adjacent cells 20, and the enclosing plate 42 is provided with positioning ribs 114 or positioning holes 115 matched with the adjacent pins 113.

Referring to fig. 7, the case 30 may support, fix and protect the battery cells 20, and since the insulating supports 10 are disposed between two adjacent battery cells 20 and the limiting plates 112 of the insulating supports 10 are wrapped on the outer sides of the battery cells 20 on both sides, the middle battery cell 20 and the case 30 are already separated by the insulating supports 10 in an insulating manner. To further isolate the two cells 20 at both ends from the case 30, an integral cover 40 is provided between the ends of the plurality of cells 20 and the case 30. Referring to fig. 8, the integral cover 40 includes a cover body 41 and a cover plate 42, the cover body 41 corresponds to a side surface of the battery cell 20 in a thickness direction, the cover plate 42 corresponds to a limiting plate 112, and wraps the side surfaces of the battery cell 20 in a width and length direction, so that the battery cells 20 are isolated from the case 30, and the case 30 encloses the integral cover 40, the battery cells 20 and the insulating bracket 10. Because the insulating support 10 is provided with the bolt 113, the bolt 113 protrudes outwards, so the box 30 is provided with the convex rib 31 avoiding the bolt 113, and the strength of the side face of the box 30 is also increased due to the convex rib 31.

Referring to fig. 9, in order to reserve a space for the cells 20 to bulge, the positioning ribs 114 are half-inserted into the positioning holes 115 when assembled. That is, the positioning ribs 114 are only inserted into the positioning holes 115 at the ends, but not completely inserted into the positioning holes 115, and the battery cells 20 are naturally arranged without being pressed against each other. When one or more cells 20 bulge, the positioning ribs 114 at the bulge position are far away from the positioning holes 115, and the bulge pressure is transmitted to other cells 20, so that the other cells 20 are mutually extruded, the positioning ribs 114 are further inserted into the positioning holes 115, and the distance between two adjacent insulating supports 10 is reduced. The positioning ribs 114 are half-inserted into the positioning holes 115, so that the connection between the insulating supports 10 is ensured, and a certain space is reserved for the insulating supports 10 to be mutually close.

In the conventional battery module, when the battery cells 20 are mounted in the case 30, the battery cells 20 are combined and pre-clamped, so that the vibration resistance stability and the electrical connectivity of the battery module are improved. Referring to fig. 10 to 12, in order to simplify the pre-clamping operation, the battery module of the present utility model is provided with an adjustment module 50 in the case 30, the adjustment module 50 including:

a baffle plate 51 disposed between the integral cover plate 40 and the case 30, the baffle plate 51 having a first surface 511 mated with the integral cover plate 40, and a second surface 512 disposed obliquely opposite to the first surface 511;

a plugboard 52, the plugboard 52 is disposed between the baffle 51 and the case 30, the plugboard 52 has a third surface 521 that mates with the second surface 512, and a fourth surface 522 that is opposite to the third surface 521 and mates with an inner side of the case 30.

In this embodiment, since the integral cover 40 is vertically disposed, the first surface 511 of the baffle 51 is a vertical surface, and this surface is attached to the integral cover 40, and since the second surface 512 is an inclined surface, the baffle 51 is not attached to the end of the case 30, but forms a wedge-shaped space with a large end and a small end. The third surface 521 of the insert plate 52 cooperates with the second surface 512 of the baffle 51, and the fourth surface 522 of the insert plate 52 cooperates with the inner surface of the housing 30, i.e. the insert plate 52 is a wedge-shaped block cooperating with the wedge-shaped space. When assembling, the baffles 51 are positioned at two ends of the box 30, the battery core 20, the insulating support 10 and the integral cover plate 40 are sequentially placed between the two baffles 51, and then the plugboard 52 is inserted into the wedge-shaped space. Or the plugboard 52 at one end is completely inserted into the box body 30, then the battery core 20, the insulating support 10, the integral cover plate 40 and the like are placed between the two baffle plates 51, and finally the plugboard 52 at the other end is inserted. The end of the insert plate 52 with smaller thickness is inserted into the end with larger opening of the wedge-shaped space, so that the insert plate 52 can be inserted smoothly, and then the insert plate 52 is forced to be inserted into the box body 30 completely. To further facilitate assembly of the insert plate 52, the inner surface of the side of the case 30 opposite to the insert plate 52 is provided with a slope. At this time, the two sides of the insert plate 52 are inclined planes, which has better guiding effect on the insert plate 52 and facilitates the insertion of the insert plate 52. With the insertion plate 52 fully inserted, the cells 20 are clamped in the case 30, and the entire pre-clamping process is completed according to the case 30. Meanwhile, the distance between the two baffles 51 can be adjusted by changing the thicknesses of the baffles 51 and the plugboards 52, so that the module scheme with different size ranges is adapted, the application range of the box body 30 is improved, and the production management is facilitated.

Referring to fig. 10, the insert plate 52 is provided with a plurality of first fixing holes, the box 30 is provided with a second fixing hole 53 that is matched with the first fixing holes, and bolts penetrate through the first fixing holes and the second fixing holes 53 to fix the insert plate 52 and the box 30, so as to avoid displacement of the insert plate 52 in the wedge-shaped space. The second fixing hole 53 is configured as a kidney-shaped hole since the insert plate 52 can be replaced according to a modular scheme of a different size range. Thus, even if the size of the insert plate 52 is changed, the first fixing hole can be matched with the second fixing hole 53, and the fixing of the insert plate 52 and the case 30 is realized.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. An insulating support for between electric core, characterized by, including first support and the second support that sets up at electric core bilateral symmetry, first support and second support include:

2. The insulating holder for use between cells according to claim 1, wherein the sum of the widths of the first and second holders is less than the width of the cell.

3. The insulating holder for use between electrical cells according to claim 1, wherein a plurality of the pins are provided on the limiting plate.

4. The insulating support for battery cells according to claim 1, wherein the positioning ribs are cylindrical, and the positioning holes are cylindrical holes matched with the positioning ribs.

5. The insulating holder for use between electrical cells according to claim 1, wherein the positioning ribs are prismatic, and the positioning holes are prismatic holes that mate with the positioning ribs.

6. A battery module, comprising:

the battery cores are arranged side by side along the thickness direction;

the battery cells are accommodated in the box body;

a plurality of insulating supports as claimed in any one of claims 1 to 5, wherein the insulating supports are arranged between any two adjacent electric cores, and the coaming is provided with positioning ribs or positioning holes matched with the adjacent bolts.

7. The battery module of claim 6, wherein the positioning rib is half-inserted into the positioning hole.

8. The battery module of claim 6, wherein an adjustment module is disposed in the housing, the adjustment module comprising:

9. The battery module according to claim 8, wherein the insertion plate is provided with a plurality of first fixing holes, the case is provided with second fixing holes matched with the first fixing holes, and the second fixing holes are kidney-shaped holes.

10. The battery module of claim 6, wherein the case is provided with ribs for avoiding the pins.