CN219286560U

CN219286560U - Battery pack

Info

Publication number: CN219286560U
Application number: CN202223046469.8U
Authority: CN
Inventors: 卢凯航; 陈智伟; 陈朝海
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-06-30
Anticipated expiration: 2032-11-16

Abstract

The utility model belongs to the technical field of batteries, and particularly discloses a battery pack which comprises a plurality of electric cores, a box body and an aluminum extrusion tray, wherein through fixing holes are formed in the aluminum extrusion tray, the electric cores are fixed in the fixing holes, the electric cores can be fixed into groups through the aluminum extrusion tray, the aluminum extrusion tray is in a flat plate shape and welded on the inner side wall of the box body, a pressure release space is formed between the aluminum extrusion tray and the box body, and the pressure release space is communicated with the outer space of the box body.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

At present, most of cylindrical battery packs in the industry fix battery cells together through assembled brackets and trays, then install brackets, trays and battery cells in the box, because cylindrical battery packs comprise multiple models, the sizes of the cylindrical battery packs are all different, and therefore special die casting molds are required to be designed corresponding to different brackets and trays, the die casting molds have longer die opening period, the product research and development period is longer, the cost is higher, and meanwhile, the structure of the tray is more complex, and the product processing efficiency is lower.

Therefore, there is a need for a battery pack to solve the above problems.

Disclosure of Invention

The utility model aims to provide a battery pack, wherein an aluminum extrusion tray is directly connected with the inner side wall of a box body, the structure is simple, the die opening cost is low, the research and development period is short, the processing is easy, and the production efficiency of products is high.

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

the present utility model provides a battery pack comprising:

a plurality of electric cores;

a case; and

the aluminum extrusion tray is in a flat plate shape, the aluminum extrusion tray is connected with the inner side wall of the box body, a pressure relief space is formed between the aluminum extrusion tray and the box body, the pressure relief space is communicated with the outer space of the box body, a plurality of through fixing holes are formed in the aluminum extrusion tray, the fixing holes are in one-to-one correspondence with the battery cells, and each battery cell is inserted into one fixing hole.

Optionally, the battery core is fixedly connected with the aluminum extrusion tray through a heat conduction structure glue.

Optionally, a reinforcing rib is arranged at the bottom of the aluminum extrusion tray.

Optionally, the box includes interconnect's plug-in components panel, left side roof beam, right side roof beam, back beam and end backplate, three sides of aluminium crowded tray respectively with left side roof beam right side roof beam with the back beam is connected, the strengthening rib with end backplate is connected.

Optionally, a partition board is arranged in the box body, the partition board is fixed on the bottom guard board, and the other side edge of the aluminum extrusion tray is connected with the partition board.

Optionally, the left side beam, the right side beam and the inner side wall of the back beam are all provided with limiting steps, the aluminum extrusion tray is connected with the limiting steps, and the height of the limiting steps is equal to that of the reinforcing ribs.

Optionally, a first ventilation channel is arranged on the outer side of the rear beam, and the first ventilation channel is communicated with the pressure relief space and the external space of the box body.

Optionally, the outside of left side roof beam is equipped with the second ventilation passageway, the outside of right side roof beam is equipped with the third ventilation passageway, the third ventilation passageway all with first ventilation passageway intercommunication, the second ventilation passageway with the third ventilation passageway with the outside space intercommunication of box.

Optionally, a pressure release hole is formed in the second ventilation channel and/or the third ventilation channel, and a pressure release valve is arranged on the pressure release hole.

Optionally, the box includes fixed frame, the plug-in components panel, left side roof beam, right side roof beam with the upper edge of back beam all outwards extends and forms the flange, fixed frame with the flange passes through the connecting piece and connects.

The beneficial effects of the utility model are as follows:

the utility model provides a battery pack which comprises a plurality of electric cores, a box body and an aluminum extrusion tray, wherein the aluminum extrusion tray is in a flat plate shape, through fixing holes are formed in the aluminum extrusion tray, the fixing holes are in one-to-one correspondence with the electric cores, each electric core is fixed in one fixing hole, the electric cores can be fixed into groups through the aluminum extrusion tray, four sides of the aluminum extrusion tray are connected with the inner side wall of the box body, a pressure relief space is formed between the aluminum extrusion tray and the box body, and the pressure relief space is communicated with the outer space of the box body. Compared with the prior art that the battery cell is fixed through the bracket and the tray, the battery pack omits the bracket and the tray in the prior art, the aluminum extrusion tray is directly fixed on the inner side wall of the box body, the processing is easy, the processing efficiency of the battery pack is greatly improved, the structure of the aluminum extrusion tray is simple, the die casting and die opening cost is low, the die opening period is short, the production process is greatly accelerated, the fixing holes on the aluminum extrusion tray can be manufactured in a machining mode, the processing mode is simple, the processing efficiency is high, the production period is shortened, and the product production efficiency is high.

Drawings

Fig. 1 is a schematic structural view of an aluminum extrusion tray provided in an embodiment of the present utility model;

FIG. 2 is a schematic view of an aluminum extrusion tray according to an embodiment of the present utility model from another perspective;

fig. 3 is a schematic view of a structure of a battery pack provided in an embodiment of the present utility model;

fig. 4 is an exploded view of a battery pack provided in an embodiment of the present utility model;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic view of a left side rail provided in an embodiment of the present utility model;

fig. 7 is a partial enlarged view at B in fig. 6.

In the figure:

100. an aluminum extrusion tray; 110. a fixing hole; 120. reinforcing ribs; 200. a case; 210. a plug-in panel; 220. a left side beam; 221. a second ventilation channel; 222. a second vent hole; 230. a right side beam; 231. a third air passage; 232. a pressure relief hole; 240. a rear beam; 241. a first ventilation channel; 242. a first vent; 250. a bottom guard board; 260. a partition plate; 270. a limit step; 280. a fixed frame; 290. a flange; 300. a pressure release valve; 400. welding seams; 500. and a connecting piece.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1-4, the present embodiment provides a battery pack, which includes a plurality of battery cells, a box 200 and an aluminum extrusion tray 100, wherein the aluminum extrusion tray 100 is in a flat plate shape, and a through fixing hole 110 is provided on the aluminum extrusion tray 100, the fixing holes 110 are arranged in one-to-one correspondence with the battery cells, each battery cell is inserted into one fixing hole 110, and a plurality of battery cells can be fixed into a group through the aluminum extrusion tray 100. The aluminum extrusion tray 100 is connected with the inner side wall of the box body 200, a pressure relief space is formed between the aluminum extrusion tray 100 and the box body 200, and the pressure relief space is communicated with the outer space of the box body 200. During installation, the bottom of electric core sets up towards box 200 one side to when the inside thermal runaway that takes place of electric core, electric core bottom spun high temperature flue gas can discharge to the box 200 outside through the pressure release space, in order to avoid the box 200 inside pressure too big to cause the explosion. Alternatively, in some embodiments, the aluminum extruded tray 100 may be connected to the box 200 by welding.

Because the aluminum extrusion tray 100 in this embodiment is directly connected with the inner side wall of the box 200, and compared with the previous method of fixing the battery cell through the bracket and the tray, the die sinking cost of the aluminum extrusion tray 100 in this embodiment is low, the research and development period is shorter, and the fixing holes 110 on the aluminum extrusion tray 100 can be manufactured in a machining mode, so that the processing is easy, the production efficiency of the product is higher, and the manufacturing process of the battery pack is further accelerated, and the production efficiency is higher.

As an alternative, the battery cells in the present embodiment and the aluminum extrusion tray 100 may be fixedly connected by a heat conductive structural adhesive. On the one hand, can be fixed with crowded tray 100 of aluminium and electric core through heat conduction structure glue, on the other hand, heat conduction structure glue can improve the heat conduction rate between electric core and the crowded tray 100 of aluminium, because crowded tray 100 of aluminium adopts aluminium metal material to make, and heat conduction rate is faster, can give off the heat of electric core in the air fast, has certain cooling effect.

Further, in order to improve the mechanical strength of the extruded aluminum tray 100, the bottom of the extruded aluminum tray 100 in this embodiment is provided with a reinforcing rib 120, and the reinforcing rib 120 may be welded on the extruded aluminum tray 100. Of course, in some embodiments, the ribs 120 may also be injection molded with the aluminum extruded tray 100.

Further, the box 200 in this embodiment includes an insert panel 210, a left side beam 220, a right side beam 230, a back beam 240 and a bottom guard 250 that are connected to each other, the box 200 is enclosed by the insert panel 210, the left side beam 220, the right side beam 230, the back beam 240 and the bottom guard 250, three sides of the aluminum extrusion tray 100 are respectively connected to the left side beam 220, the right side beam 230 and the back beam 240, and the stiffener 120 at the bottom of the aluminum extrusion tray 100 is connected to the bottom guard 250. A partition plate 260 is further arranged in the box body 200, the partition plate 260 is fixed on the bottom guard plate 250, and the other side edge of the aluminum extrusion tray 100 is connected with the partition plate 260. Because the bottom of the aluminum extrusion tray 100 is provided with the reinforcing ribs 120, and the reinforcing ribs 120 are connected with the bottom guard plate 250, on one hand, the reinforcing ribs 120 can play a certain supporting role on the aluminum extrusion tray 100, on the other hand, the reinforcing ribs 120 can divide a pressure release space between the box 200 and the aluminum extrusion tray 100 into a plurality of subspaces, and then when a certain battery cell is out of control due to heat, the battery cell is discharged out of the box 200 through the corresponding subspace, so that the heat is prevented from spreading, other battery cells in the subspace are influenced, and the safety performance is improved. Of course, the insert panel 210, the left side rail 220, the right side rail 230, the rear rail 240, and the bottom guard 250 may be connected by welding, and the weld 400 may be disposed at a position where the insert panel 210, the left side rail 220, the right side rail 230, the rear rail 240, and the bottom guard 250 meet.

In order to further improve the fixing effect between the insert panel 210, the left side beam 220, the right side beam 230 and the rear beam 240, the case 200 in this embodiment further includes a fixing frame 280, and the upper edges of the insert panel 210, the left side beam 220, the right side beam 230 and the rear beam 240 are all extended outwards to form a flange 290, and the fixing frame 280 is connected with the flange 290 through a connecting piece 500. Alternatively, the connecting piece 500 may be a common screw or bolt, and the fixing effect is good.

As an alternative, in this embodiment, the inner side walls of the left side beam 220, the right side beam 230 and the rear beam 240 are provided with a limiting step 270, the lower end surface of the aluminum extrusion tray 100 is connected with the limiting step 270, and the height of the limiting step 270 is equal to that of the reinforcing rib 120. The limiting step 270 can play a certain supporting role on the aluminum extrusion tray 100, and further ensures the stability of fixing the aluminum extrusion tray 100.

Further, referring to fig. 5, a first ventilation channel 241 is provided on the outer side of the back beam 240, a through first ventilation hole 242 is provided on the limit step 270 on the inner side of the back beam 240, the first ventilation hole 242 communicates the first ventilation channel 241 with the pressure release space, the first ventilation channel 241 communicates with the external space of the case 200, so that high-temperature flue gas sprayed from the bottom of the battery cell can be discharged out of the case 200 through the pressure release space, the first ventilation hole 242 and the first ventilation channel 241 in sequence. Illustratively, the first vent holes 242 may be provided in plurality, and the plurality of first vent holes 242 are uniformly distributed on the stopper step 270 of the back beam 240. In this embodiment, four first vent holes 242 are illustrated as an example.

Referring to fig. 4, 6 and 7, the outer side of the left side beam 220 is provided with a second ventilation channel 221, the outer side of the right side beam 230 is provided with a third ventilation channel 231, the third ventilation channel 231 is communicated with a first ventilation channel 241 on the rear beam 240, the second ventilation channel 221 and the third ventilation channel 231 are communicated with the external space of the case 200, so that high-temperature flue gas sprayed out of the bottom of the battery cell can be discharged out of the case 200 through the pressure release space, the first ventilation hole 242, the first ventilation channel 241, the second ventilation channel 221 and the third ventilation channel 231 in sequence. The high-temperature flue gas is discharged from the first ventilation channel 241 into both the second ventilation channel 221 and the third ventilation channel 231.

Of course, in some embodiments, a through second ventilation hole 222 may be formed on the limiting step 270 of the left side beam 220, the second ventilation hole 222 communicates the pressure release space with the second ventilation channel 221, and a through third ventilation hole (not shown in the figure) is formed on the limiting step 270 of the right side beam 230, and the third ventilation hole communicates the pressure release space with the third ventilation channel 231, thereby being beneficial to improving the exhaust capacity of the high-temperature flue gas and reducing the flow resistance of the high-temperature flue gas. The second ventilation holes 222 and the third ventilation holes may be provided in one or more embodiments. In this embodiment, a second ventilation hole 222 and a third ventilation hole are taken as examples.

Further, the second ventilation channel 221 and/or the third ventilation channel 231 are/is provided with a pressure relief hole 232, the pressure relief hole 232 is provided with a pressure relief valve 300, and high-temperature flue gas in the pressure relief space can be discharged out of the box body 200 through the pressure relief hole 232 and the pressure relief valve 300, so that explosion caused by pressure holding in the pressure relief space is avoided, and the safety performance is good.

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. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. 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. A battery pack, comprising:

a plurality of electric cores;

a case (200); and

the aluminum extrusion tray (100), the aluminum extrusion tray (100) is in a flat plate shape, the aluminum extrusion tray (100) is welded with the inner side wall of the box body (200), a pressure relief space is formed between the aluminum extrusion tray (100) and the box body (200), the pressure relief space is communicated with the outer space of the box body (200), a plurality of through fixing holes (110) are formed in the aluminum extrusion tray (100), the fixing holes (110) are arranged in a one-to-one correspondence manner with the electric cores, and each electric core is inserted into one fixing hole (110);

the bottom of the aluminum extrusion tray (100) is provided with a reinforcing rib (120), and the reinforcing rib (120) divides the pressure relief space between the box body (200) and the aluminum extrusion tray (100) into a plurality of subspaces.

2. The battery pack according to claim 1, wherein the cells are fixedly connected with the aluminum extrusion tray (100) by a heat conducting structural adhesive.

3. The battery pack according to claim 1, wherein the case (200) includes an insert panel (210), a left side rail (220), a right side rail (230), a rear rail (240) and a bottom guard (250) connected to each other, three sides of the aluminum extrusion tray (100) are connected to the left side rail (220), the right side rail (230) and the rear rail (240), respectively, and the reinforcing bars (120) are connected to the bottom guard (250).

4. A battery pack according to claim 3, wherein a separator (260) is provided in the case (200), the separator (260) is fixed to the bottom plate (250), and the other side of the aluminum extrusion tray (100) is connected to the separator (260).

5. The battery pack according to claim 3, wherein the left side beam (220), the right side beam (230) and the rear beam (240) are each provided with a limiting step (270), the aluminum extruded tray (100) is connected with the limiting steps (270), and the height of the limiting steps (270) is equal to the height of the reinforcing ribs (120).

6. A battery pack according to claim 3, wherein a first ventilation channel (241) is provided at the outer side of the back beam (240), and the first ventilation channel (241) communicates with the pressure release space and the outer space of the case (200).

7. The battery pack according to claim 6, wherein a second ventilation channel (221) is provided on the outer side of the left side beam (220), a third ventilation channel (231) is provided on the outer side of the right side beam (230), the third ventilation channels (231) are all communicated with the first ventilation channel (241), and the second ventilation channel (221) and the third ventilation channel (231) are communicated with the external space of the case body (200).

8. The battery pack according to claim 7, wherein a pressure relief hole (232) is provided in the second ventilation channel (221) and/or the third ventilation channel (231), and a pressure relief valve (300) is provided in the pressure relief hole (232).

9. The battery pack according to any one of claims 3-8, wherein the case (200) includes a fixing frame (280), and upper edges of the insert panel (210), the left side rail (220), the right side rail (230), and the rear rail (240) are each extended outwardly to form a flange (290), and the fixing frame (280) is connected to the flange (290) by a connection member (500).