CN114976459A

CN114976459A - Tray assembly of battery and battery module

Info

Publication number: CN114976459A
Application number: CN202210691720.1A
Authority: CN
Inventors: 邱文聪; 李凡; 陈智伟; 陈朝海
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-08-30

Abstract

The invention relates to the technical field of batteries, and particularly discloses a tray assembly of a battery and a battery module, wherein the tray assembly of the battery comprises a plastic support and a tray, the plastic support comprises a frame and a plurality of fixed rings which are mutually connected, the fixed rings are provided with limiting bulges, the limiting bulges are attached to the outer side wall of an electric core, the electric core can be positioned through the limiting bulges and the fixed rings, the assembly precision is higher, the plastic support is installed in the tray, the positions, corresponding to the fixed rings, on the tray are provided with through avoidance holes, the tray assembly of the battery has enough strength, the plastic support ensures that the electric core and the tray assembly of the battery have good insulation performance, short circuit does not occur easily, the safety performance is good, and the electric core is positioned accurately through the arrangement of the limiting bulges. The invention provides a battery module, which comprises a plurality of battery cores and the tray assembly of the battery.

Description

Tray assembly of battery and battery module

Technical Field

The invention relates to the technical field of batteries, in particular to a tray assembly of a battery and a battery module.

Background

The tray structure of current battery module generally adopts plastic support or metal support, wherein, the intensity of plastic support is relatively poor, in the use of battery module, because the easy condition that produces the deformation that generates heat of electricity core, the fixed effect of electricity core is not good, and the precision of plastic support at the in-process preparation size of preparation is not high, consequently, the precision is relatively poor when electricity core assembly, and use some intensity higher, during the higher material of preparation precision, cause the increase of cost, for example, metal support has better intensity, but metal support's insulating properties is relatively poor, need increase insulating film or spraying insulating layer, the manufacturing process is loaded down with trivial details, the cost is higher.

Therefore, a tray assembly for a battery and a battery module are needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a tray assembly of a battery and a battery module, which have high mechanical strength, good insulating property, accurate positioning of a battery core and high assembly precision.

In order to achieve the purpose, the invention adopts the following technical scheme:

in one aspect, the present invention provides a tray assembly for a battery, configured to fix a plurality of battery cells, the tray assembly for a battery including:

the plastic support comprises a frame and a plurality of fixed rings which are connected with each other, the adjacent fixed rings are connected with each other, a limiting bulge is arranged at the joint between the adjacent fixed rings, the limiting bulge comprises a cambered surface, the cambered surface is attached to the outer side wall of the battery cell, and the bottom of the battery cell is connected with the upper end surface of the fixed ring;

the tray, the plastic support sets up in the tray, the position that corresponds on the tray fixed ring is equipped with the hole of dodging that link up.

Optionally, the tray assembly of the battery comprises a structural adhesive, and the plastic support, the tray and the battery core are fixedly connected by the structural adhesive.

Optionally, the limiting protrusion is of a trapezoid structure, and a V-shaped groove is formed in a side end face, which is not attached to the battery cell, of the limiting protrusion.

Optionally, the fixed ring is towards tray one side is outwards extended and is had first annular lateral wall and second annular lateral wall, first annular lateral wall with the outer lane of fixed ring is connected, second annular lateral wall with the inner circle of fixed ring is connected, first annular lateral wall, second annular lateral wall with form annular between the fixed ring and store up gluey groove.

Optionally, the diameter of dodging the hole is greater than the diameter of fixed ring inner circle, just the diameter of dodging the hole is less than the diameter of fixed ring outer lane, the height of first annular lateral wall is less than the height of second annular lateral wall, the tip of first annular lateral wall with the up end butt of tray, the tip of second annular lateral wall passes dodge the hole setting, form annular flange after the tip of second annular lateral wall is buckled, annular flange with the lower terminal surface butt of tray.

Optionally, a glue inlet is formed in the first annular side wall, the glue inlet is located at the end of the first annular side wall, and the glue inlet is communicated with the annular glue storage groove.

Optionally, the lower terminal surface of tray is equipped with the strengthening rib, the strengthening rib encircles the hole setting of dodging.

Optionally, the tray includes a bottom plate and a side plate connected to each other, and the avoiding hole is provided on the bottom plate.

Optionally, the upper end of the side plate extends outwards to form a flange, and the upper end face of the flange is provided with a mounting part.

Optionally, the outer wall epirelief of curb plate is equipped with the stopper.

On the other hand, the invention provides a battery module, which comprises a plurality of battery cores and the tray assembly of the battery in any scheme, wherein the battery cores are fixed in the tray assembly of the battery.

The invention has the beneficial effects that:

the invention provides a tray assembly of a battery, which comprises a plastic support and a tray, wherein the plastic support comprises a frame and a plurality of fixing rings which are mutually connected, a limiting bulge is arranged at the joint between the adjacent fixing rings, the limiting bulge and the fixing rings jointly fix a battery cell, the contact surface of the limiting bulge and the battery cell is a cambered surface, the cambered surface is attached to the outer side wall of the battery cell, the plastic support is installed in the tray, a through avoidance hole is formed in the position, corresponding to the fixing rings, on the tray, and the plastic support, the tray and the battery cell are fixedly connected through structural glue. Through combining plastic support and tray, the tray has guaranteed that the tray subassembly of battery has sufficient intensity, and the insulating properties between the tray subassembly of electric core and battery that the plastic support has guaranteed is good, is difficult for taking place the short circuit, and the security performance is good to through spacing bellied setting, the location of electric core is accurate, and the assembly precision is higher.

The invention provides a battery module, which comprises a plurality of battery cores and a tray assembly of the battery, wherein the battery cores are fixed in the tray assembly of the battery, the tray assembly of the battery has higher strength, the deformation caused by the heating of the battery cores is avoided, the tray assembly of the battery has good insulating property, is not easy to short circuit, and has accurate positioning and higher assembly precision when the battery cores are assembled.

Drawings

Fig. 1 is an exploded view of a tray assembly for a battery provided in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a plastic bracket according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic structural diagram of a plastic bracket according to another view angle in the embodiment of the present invention;

FIG. 5 is a partial enlarged view of the portion B in FIG. 4;

FIG. 6 is a schematic structural diagram of a tray assembly for assembled batteries provided in an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at C;

fig. 8 is a schematic structural view of the assembled battery tray assembly provided in the embodiment of the present invention from another perspective;

fig. 9 is a partial enlarged view of fig. 8 at D.

In the figure:

100. a plastic bracket; 110. a frame; 120. fixing the circular ring; 130. a limiting bulge; 1301. a cambered surface; 1302. a V-shaped groove; 140. a first annular sidewall; 1401. a glue inlet; 150. a second annular sidewall; 160. an annular glue storage tank;

200. a tray; 201. avoiding holes; 210. a base plate; 220. a side plate; 221. a limiting block; 230. a flange; 231. a mounting section; 240. reinforcing ribs;

300. and (4) structural adhesive.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. 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. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1 to fig. 3, the present embodiment provides a tray assembly of a battery, the tray assembly of the battery includes a plastic support 100 and a tray 200, the plastic support 100 is installed in the tray 200, and the plastic support 100, the tray 200 and a battery cell are fixedly connected through a structural adhesive 300. Plastic support 100 includes interconnect's frame 110 and a plurality of fixed ring 120, fixed ring 120 arranges along first direction and second direction array, it should explain, first direction is the length direction of frame 110 in this embodiment, the second direction is the width direction of frame 110, interconnect between the adjacent fixed ring 120, and junction between the adjacent fixed ring 120 is equipped with spacing arch 130, spacing arch 130 includes cambered surface 1301, the lateral wall laminating of cambered surface 1301 and electric core, the bottom of electric core is connected with fixed ring 120's up end. Every spacing arch 130 is last to include two cambered surfaces 1301, and two cambered surfaces 1301 are relative to be set up, and two cambered surfaces 1301 laminate with the lateral wall of two adjacent electric cores respectively.

Exemplarily, two adjacent rows of fixed rings 120 arranged along the first direction in this embodiment are arranged in a staggered manner, so as to enclose a triangular structure between three adjacent fixed rings 120, each fixed ring 120 is connected with six adjacent fixed rings 120, six limiting protrusions 130 are arranged at the joints of the fixed rings 120 and the six adjacent fixed rings 120, an electric core is jointly positioned by the six limiting protrusions 130 and the fixed rings 120, the side wall of the electric core can be clamped by the limiting protrusions 130, the bottom of the electric core is abutted against the upper end face of the fixed rings 120, so that the positioning and pre-fixing effects of the limiting protrusions 130 and the fixed rings 120 on the electric core are achieved, the accurate installation of the electric core is ensured, and meanwhile, the automatic arrangement of the electric core is facilitated.

In some embodiments, the frame 110 and the fixed ring 120 may be formed by injection molding, the frame 110 and the fixed ring 120 are made of plastic materials or other materials with good insulating properties, and the tray 200 is made of metal materials, so that the battery cell does not directly contact the tray 200 due to the abutting of the bottom of the battery cell and the fixed ring 120, the insulating properties are good, the short circuit is avoided, and the safety performance is high. In addition, generally speaking, the bottom of electric core all is equipped with pressure release structure, and the position that corresponds fixed ring 120 on the tray 200 is equipped with the hole 201 of dodging that link up, and pressure release structure can be dodged in the hole 201 of dodging of fixed ring 120 and tray 200 bottom, and when electric core inside appearance pressure was too high, pressure release structure can be washed away to through fixed ring 120 and dodge hole 201 outflow battery module, avoid the explosion, further guaranteed user's safety.

Optionally, in some embodiments, the tray 200 may be made of stainless steel, so as to ensure that the tray 200 has high mechanical strength, can provide good supporting effect for the plastic bracket 100, and is not easy to deform. More preferably, in some embodiments, the tray 200 may be integrally injection-molded by using an aluminum material, on one hand, the tray 200 manufactured by injection molding has high precision, and the avoiding hole 201 on the tray 200 is accurately located, and on the other hand, the aluminum material also has high mechanical strength, and can provide a good supporting effect for the plastic bracket 100.

Further, the plastic bracket 100, the tray 200 and the battery cell in the embodiment may be fixedly connected by the structural adhesive 300. Specifically, when the assembly, install plastic support 100 in tray 200, and make fixed ring 120 correspond the setting with dodging hole 201, then glue 300 filling with the structure in tray 200, thereby glue 300 can flow into the triangle-shaped structure that adjacent three fixed ring 120 encloses in the structure, with fixed adjacent three electric core, because all fill in every triangle-shaped structure has structure to glue 300, thereby structure is glued 300 and can be fixed with all electric cores and plastic tray, the triangle-shaped structure is favorable to shortening the bonding route that structure glued 300, the fixed strength of electric core has been increased, structure is glued 300 and also can flow into the gap between plastic support 100 and the tray 200, thereby with plastic support 100 and tray 200 fixed connection.

As an optional technical solution, the limiting protrusion 130 is of a trapezoid structure, and a V-shaped groove 1302 is disposed on a side end surface of the limiting protrusion 130, which is not attached to the battery cell. Through setting up spacing arch 130 into trapezium structure, can increase the bonding area at spacing arch 130 top under the unchangeable condition of the spacing size in the bottom of spacing arch 130 to submit the strength that electric core is in groups, it is fixed respond well, and trapezium structure's spacing arch 130 is at injection moulding's drawing of patterns in-process, deviate from the mould more easily, and product appearance is good. And the arrangement of the V-shaped groove 1302, on one hand, the arrangement of the V-shaped groove 1302 extends the longest path along which the structural adhesive 300 flows, so as to ensure that the structural adhesive 300 can completely fill the gap between the battery cells, increase the bonding area between the structural adhesive 300 and the limiting protrusion 130, and improve the fixing strength, and on the other hand, the arrangement of the V-shaped groove 1302 extends the length of the side wall surface of the limiting protrusion 130 along the thickness direction thereof, i.e. the side length of the vertex angle of the triangular structure surrounded by the three fixing rings 120, and the creepage distance between two battery cells fixed by two adjacent fixing rings 120 is the width of the two fixing rings 120 along the radial direction thereof plus the side length of the vertex angle of the triangular structure, so as to increase the creepage distance between two adjacent battery cells, and ensure the electrical safety, in addition, the arrangement of the V-shaped groove 1302 can also increase the creepage distance between the battery cell fixed by the fixing ring 120 and the tray 200 along the height direction of the limiting protrusion 130, the electrical safety between the battery cell and the tray 200 is ensured.

Referring to fig. 4 and 5, the fixing ring 120 extends outward toward the tray 200 to form a first annular sidewall 140 and a second annular sidewall 150, the first annular sidewall 140 is connected to an outer ring of the fixing ring 120, the second annular sidewall 150 is connected to an inner ring of the fixing ring 120, an annular glue storage groove 160 is formed between the first annular sidewall 140, the second annular sidewall 150 and the fixing ring 120, and the structural glue 300 can penetrate into the annular glue storage groove 160, so as to fixedly connect the plastic support 100 and the tray 200.

Further, the diameter of dodging hole 201 is greater than the diameter of fixed ring 120 inner circle, and the diameter of dodging hole 201 is less than the diameter of fixed ring 120 outer circle, the height of first annular lateral wall 140 is less than the height of second annular lateral wall 150, plastic support 100 installs back in tray 200, the tip of first annular lateral wall 140 and the up end butt of tray 200, the tip of second annular lateral wall 150 passes and dodges hole 201 and sets up, because the setting of gluey groove 160 is stored up to the annular, make and to hold more structural adhesives 300 between plastic support 100 and the tray 200, make plastic support 100 more firm with the fixed of tray 200. In addition, in order to further increase the fixing strength between the plastic bracket 100 and the tray 200, the end of the second annular side wall 150 may be bent by hot riveting, and the end of the second annular side wall 150 is bent to form an annular flange, which can wrap the avoiding hole 201 of the tray 200 and abut against the lower end surface of the tray 200.

Referring to fig. 6 and 7, a glue inlet 1401 is arranged on the first annular sidewall 140, the glue inlet 1401 is located at an end of the first annular sidewall 140, and the glue inlet 1401 is communicated with the annular glue storage groove 160, so that the structural glue 300 can enter the annular glue storage groove 160 conveniently. Illustratively, a plurality of glue inlets 1401 may be provided, the glue inlets 1401 are uniformly distributed in the circumferential direction of the first annular sidewall 140, the glue inlets 1401 may be provided at a triangular structure surrounded by three adjacent fixed rings 120, the glue inlets 1401 are located at the sides of the triangular structure, it is ensured that the structural glue 300 can fill the gap between the tray 200 and the plastic support 100, and the overall strength of the tray assembly of the battery is improved.

Further, the tray 200 includes a bottom plate 210 and a side plate 220 connected to each other, the avoiding hole 201 is disposed on the bottom plate 210, the bottom plate 210 and the side plate 220 together form an accommodating chamber, the plastic support 100 is mounted in the accommodating chamber, an upper end of the side plate 220 extends outward to form a flange 230, and an upper end surface of the flange 230 is provided with a mounting portion 231. The mounting portion 231 may be provided as a lifting screw hole, thereby facilitating the transfer or assembly process of the tray assembly of the battery.

Referring to fig. 8 and 9, the lower end surface of the tray 200 is provided with a reinforcing rib 240, the reinforcing rib 240 is disposed around the avoiding hole 201, and the reinforcing rib 240 can avoid an annular flange formed at the end of the second annular side wall 150, so as to avoid interference with the annular flange, which causes a poor fixing effect. In some embodiments, the reinforcing ribs 240 may be in a wave shape, and by providing the wave-shaped reinforcing ribs 240, the mechanical strength of the tray 200 may be enhanced, and at the same time, the heat transfer area may also be increased, and when thermal runaway occurs in the battery cell, more heat of high-temperature gas ejected from the battery cell may be absorbed by the reinforcing ribs 240, and the heat generated by the high-temperature gas may be led out.

Preferably, the reinforcing ribs 240 and the tray 200 can be integrally injection molded, so that the processing steps of the tray 200 are reduced, the manufacturing process is simple, and the connection strength between the reinforcing ribs 240 and the tray 200 is high.

In some embodiments, a stop block 221 is protruded on an outer wall of the side plate 220 of the tray 200. Through the setting of stopper 221, conveniently fix a position the tray subassembly of battery to guarantee that the assembly precision of the tray subassembly of battery is higher.

The invention also provides a battery module, which comprises a plurality of battery cores and the tray assembly of the battery, wherein the battery cores are fixed in the tray assembly of the battery, the tray assembly of the battery has higher strength, the deformation caused by the heating of the battery cores is avoided, the tray assembly of the battery has good insulating property, is not easy to short circuit, and has accurate positioning and higher assembly precision when being assembled.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A tray assembly of battery for fixing a plurality of electric cores, comprising:

the plastic support (100) comprises a frame (110) and a plurality of fixed rings (120) which are connected with each other, the adjacent fixed rings (120) are connected with each other, a limiting bulge (130) is arranged at the joint between the adjacent fixed rings (120), the limiting bulge (130) comprises an arc surface (1301), the arc surface (1301) is attached to the outer side wall of the battery cell, and the bottom of the battery cell is connected with the upper end face of the fixed ring (120);

tray (200), plastic support (100) set up in tray (200), the position that corresponds on tray (200) fixed ring (120) is equipped with the hole of dodging (201) that link up.

2. The tray assembly of the battery according to claim 1, comprising a structural adhesive (300), wherein the structural adhesive (300) fixedly connects the plastic support (100), the tray (200) and the battery cell.

3. The tray assembly of the battery according to claim 1, wherein the limiting protrusion (130) is in a trapezoid structure, and a V-shaped groove (1302) is formed in the side end face, which is not attached to the battery cell, of the limiting protrusion (130).

4. The tray assembly of batteries according to claim 1, wherein a first annular side wall (140) and a second annular side wall (150) extend outwards from the fixing ring (120) towards one side of the tray (200), the first annular side wall (140) is connected with the outer ring of the fixing ring (120), the second annular side wall (150) is connected with the inner ring of the fixing ring (120), and an annular glue storage groove (160) is formed between the first annular side wall (140), the second annular side wall (150) and the fixing ring (120).

5. The tray assembly of battery according to claim 4, characterized in that, the diameter of dodging hole (201) is greater than the diameter of fixed ring (120) inner circle, just the diameter of dodging hole (201) is less than the diameter of fixed ring (120) outer circle, the height of first annular lateral wall (140) is less than the height of second annular lateral wall (150), the tip of first annular lateral wall (140) with the up end butt of tray (200), the tip of second annular lateral wall (150) passes dodge hole (201) and set up, form annular flange after the tip of second annular lateral wall (150) is buckled, annular flange with the lower terminal surface butt of tray (200).

6. The tray assembly of the battery according to claim 5, wherein a glue inlet (1401) is formed in the first annular side wall (140), the glue inlet (1401) is located at an end of the first annular side wall (140), and the glue inlet (1401) is communicated with the annular glue storage groove (160).

7. The tray assembly for batteries according to any one of claims 1 to 6, wherein the lower end surface of the tray (200) is provided with a reinforcing rib (240), and the reinforcing rib (240) is disposed around the avoiding hole (201).

8. The tray assembly of batteries according to any of claims 1 to 6, characterized in that the tray (200) comprises a bottom plate (210) and a side plate (220) connected to each other, the relief hole (201) being provided on the bottom plate (210).

9. The tray assembly for batteries according to claim 8, wherein the side plates (220) have flanges (230) formed by extending the upper ends thereof to the outside, and the flanges (230) have mounting portions (231) formed on the upper end surfaces thereof.

10. The tray assembly for batteries according to claim 8, characterized in that the outer wall of the side plate (220) is convexly provided with a stop block (221).

11. A battery module comprising a plurality of cells and a tray assembly for a battery as claimed in any one of claims 1 to 10, wherein the plurality of cells are fixed in the tray assembly for the battery.