CN218548657U

CN218548657U - Battery pack tray

Info

Publication number: CN218548657U
Application number: CN202222751840.4U
Authority: CN
Inventors: 胡世武
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-02-28
Anticipated expiration: 2032-10-19

Abstract

A battery pack tray comprises a tray main body, wherein a left side beam, a right side beam, a front side beam and a rear side beam are arranged on the tray main body, the tray main body is of a hollow structure, first isolation structures are arranged in the hollow structure at intervals, a plurality of communicated first cooling water channels are formed in the hollow structure through the first isolation structures, second isolation structures with variable lengths are arranged in the first cooling water channels at intervals, and a plurality of second cooling water channels with the same width are formed in the first cooling water channels through the second isolation structures; at the water inlet and the water outlet of the first cooling water channel, the first isolation structure is sequentially retracted towards the inside of the tray along the direction from the water inlet to the water outlet; and at the water channel communication position of the first cooling water channel, the first isolation structure and the second isolation structure are sequentially retracted towards the inside of the tray along the direction from the water inlet to the water outlet. The width of the second cooling water channel is the same, and the two ends of the second cooling water channel are retracted towards the inside of the tray to form notches, so that the overall flow resistance and the overall pressure drop of the cooling liquid can be smaller, and the cooling effect is better.

Description

Battery pack tray

Technical Field

The utility model relates to a technical field of lithium cell, concretely relates to battery package tray.

Background

Most of lithium ion power batteries used on the conventional electric commercial vehicles have the characteristics of low strength, more series-parallel connection numbers, poor cooling effect and the like. Under the condition, the use safety of the vehicle is greatly reduced, the personal safety of a driver is directly threatened, and the development of the electric commercial vehicle is also restricted.

In the existing patents and technologies, the structure of a battery box mainly adopts a battery pack flat-bottom tray with lower strength and a box cover with large depth, and cooling water channels of most trays are section cavities and are not specially and optimally designed; these conditions restrict the cooling effect of the battery box, reduce the mechanical strength of the battery box and greatly reduce the use safety of the battery box.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery package tray to prior art's defect, increase the cooling effect and the mechanical strength of battery box, improve battery package safety in utilization.

In order to achieve the above object, the utility model adopts the following technical scheme:

a battery pack tray, characterized in that: the tray comprises a tray main body, wherein a left side beam, a right side beam, a front side beam and a rear side beam are arranged on the tray main body, the tray main body is of a hollow structure, first isolation structures are arranged in the hollow structure at intervals, a plurality of communicated first cooling water channels are formed in the hollow structure through the first isolation structures, second isolation structures with variable lengths are arranged in the first cooling water channels at intervals, and a plurality of second cooling water channels with the same width are formed in the first cooling water channels through the second isolation structures; at the water inlet and the water outlet of the first cooling water channel, the first isolation structure is sequentially retracted towards the inside of the tray along the direction from the water inlet to the water outlet; and the first isolation structure and the second isolation structure are sequentially retracted into the tray along the direction from the water inlet to the water outlet at the water channel communication part of the first cooling water channel.

Furthermore, a water inlet and a water outlet of the first cooling water channel are respectively provided with a water inlet nozzle and a water outlet nozzle, and the water inlet nozzle and the water outlet nozzle are arranged outside the front edge beam.

Furthermore, the tray main body is formed by welding a left integrated bottom plate and a right integrated bottom plate, and the left integrated bottom plate and the right integrated bottom plate are integrally formed with the left side beam and the right side beam respectively.

Furthermore, flange beams protruding outwards are arranged at the top ends of the left side beam, the right side beam, the front side beam and the rear side beam.

Furthermore, hanging support plates are arranged on the outer sides of the left side beam and the right side beam at intervals, and mounting holes are formed in the hanging support plates.

Furthermore, the hanging support plate, the left side beam and the right side beam are integrally formed.

Further, the outer sides of the left side beam and the right side beam are also provided with hooks, the hooks are horizontally arranged between the adjacent hanging and supporting plates, and the hooks are longitudinally arranged between the flange beam and the hanging and supporting plates.

Further, a module front mounting beam and a module rear mounting beam are symmetrically arranged on the tray main body, and the module rear mounting beam and the rear mounting beam are integrally formed.

The utility model has the advantages that:

(1) Set up the same second cooling water course of a plurality of width in first cooling water course, second cooling water course both ends terminal surface forms the breach to the inside indentation of tray in proper order along water inlet to delivery port direction, thus, when every second cooling water course is flowed through to the coolant liquid, according to coolant liquid flow direction, by near and far, mouth of a river reposition of redundant personnel department progressively enlarges, guarantee that the flow of every second cooling water course can be even, the velocity of flow can be balanced, whole flow resistance and whole pressure drop can be littleer, compare with the pure single water course of bottom plate of traditional commercial car battery package, can make the cooling effect of battery package better.

(2) Boundary beam, flange roof beam and string support plate have formed C style of calligraphy structure in tray main part both sides, hang support plate and tray sealing face not in same horizontal plane, avoid when the installation to the tray, appear the phenomenon that the distortion appears in the tray sealing face, the effectual holistic leakproofness of tray that has ensured.

(3) The water inlet nozzle and the water outlet nozzle are arranged on the outer side of the front edge beam, and the water outlet nozzle is arranged externally, so that the risk of thermal runaway of the battery pack caused by leakage is greatly reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic view of a water channel structure provided in an embodiment of the present invention, wherein the arrow direction indicates the flow direction of the coolant;

fig. 4 is a schematic diagram of a simulation result of the water cooling scheme 1 provided in the embodiment of the present invention;

fig. 5 is a schematic diagram of a simulation result of the water cooling scheme 2 provided in the embodiment of the present invention;

FIG. 6 is a graph comparing pressure drop versus flow rate in cooling water channels for the water cooling scheme 1 and the water cooling scheme 2;

fig. 7 shows the modal simulation result in the embodiment of the present invention.

In the figure: 1-tray main body, 101-left side beam, 102-right side beam, 103-front side beam, 104-rear side beam, 105-left integrated bottom plate, 106-right integrated bottom plate, 107-flange beam, 2-hollow structure, 3-first isolation structure, 4-first cooling water channel, 401-water inlet, 402-water outlet, 403-water inlet, 404-water outlet, 405-water channel communicating part, 5-second isolation structure, 6-second cooling water channel, 7-module front mounting beam, 8-module rear mounting beam, 9-hanging plate, 901-mounting hole and 10-hook.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise. "plurality" means "two or more".

Fig. 1 to fig. 3 show schematic structural diagrams of a preferred embodiment of the present application, and for convenience of description, only parts related to the embodiment are shown, and detailed descriptions are as follows:

a battery pack tray comprises a tray main body 1, wherein a left side beam 101, a right side beam 102, a front side beam 103 and a rear side beam 104 are arranged on the tray main body 1, the tray main body 1 is provided with a hollow structure 2, first isolation structures 3 are arranged in the hollow structure 2 at intervals, a plurality of communicated first cooling water channels 4 are formed in the hollow structure by the first isolation structures 3, second isolation structures 5 with variable lengths are arranged in the first cooling water channels 4 at intervals, and a plurality of second cooling water channels 6 with the same width are formed in the first cooling water channels 4 by the second isolation structures 5; at the water inlet 401 and the water outlet 402 of the first cooling water channel 4, the second isolation structure 5 is sequentially retracted towards the inside of the tray along the direction from the water inlet 401 to the water outlet 402; at the water passage communication part 405 of the first cooling water passage 4, the first isolation structure 3 and the second isolation structure 5 are sequentially retracted toward the inside of the tray along the direction from the water inlet 401 to the water outlet 402.

As shown in fig. 3, four first isolation structures 3 are arranged in the hollow structure 2 at intervals, one end of each first isolation structure 3 is fixedly connected with the tray main body 1, the other end of each first isolation structure 3 forms an opening with the inner wall of the tray main body 1, the four first isolation structures 3 enable the hollow structure to form six communicated first cooling water channels 4, a second isolation structure 5 with variable length is arranged in each first cooling water channel 4 at intervals, the second isolation structure 5 which is closer to the next first cooling water channel is shorter, the second isolation structure 5 enables a plurality of second cooling water channels 6 to be formed in the first cooling water channels 4, the width of each second cooling water channel 6 is the same, and the second isolation structures 5 are sequentially retracted into the tray along the direction from the water inlet 401 to the water outlet 402 at the positions of the water inlet 401 and the water outlet 402 of the first cooling water channel 4; at the water course intercommunication department 405 of first cooling water course 4, first isolation structure 3 and second isolation structure 5 are along water inlet 401 to delivery port 402 direction in proper order to the inside indentation of tray, make 6 both ends terminal surfaces of second cooling water course form to the inside indentation of tray along water inlet 401 to delivery port 402 direction like this, when guaranteeing that the coolant liquid flows through every second cooling water course 6 like this, according to coolant liquid flow direction, by near and far, mouth of a river reposition of redundant personnel department progressively enlarges, make the flow of every second cooling water course 6 can be even, the velocity of flow can be balanced, whole flow resistance and whole pressure drop can be littleer, compare with the pure bottom plate single water course of traditional commercial car battery package, can make the cooling effect of battery package better.

As shown in fig. 4-6, the water course of water-cooling scheme 1 adopts the pure single water course of bottom plate of traditional commercial car battery package, and the water course of water-cooling scheme 2 adopts the utility model discloses the structure can know through the contrast of simulation effect, and the flow of water-cooling scheme 2 is more even, and the pressure drop is littleer.

The water inlet 401 and the water outlet 402 of the first cooling water channel 4 are respectively provided with a water inlet nozzle 403 and a water outlet nozzle 404, and the water inlet nozzle 403 and the water outlet nozzle 404 are arranged on the tray main body 1 outside the front edge beam 103. Thus, if the tray box body is in accident, leakage from the water inlet nozzle 403 and the water outlet nozzle 404 does not affect the electric core inside the battery pack, and the thermal runaway risk caused by leakage is greatly reduced.

The tray main body 1 is formed by welding a left integrated bottom plate 105 and a right integrated bottom plate 106 in bilateral symmetry, and the left integrated bottom plate 105 and the right integrated bottom plate 106 are respectively integrally formed with the left side beam 101 and the right side beam 102. The left integrated baseplate 105 and the right integrated baseplate 106 are identical in cross section and can be produced by the same secondary mould, so that cost can be saved.

The top ends of the left side member 101, the right side member 102, the front side member 103, and the rear side member 104 are provided with flange members 107 protruding outward, and the flange members 107 serve as pallet sealing surfaces. The outer sides of the left side beam 101 and the right side beam 102 are provided with the hanging and carrying plates 9 at intervals, and the hanging and carrying plates 9 are integrally formed with the left side beam 101 and the right side beam 102. Two symmetrical mounting holes 901 are formed in the hanging and carrying plate 9, and the hanging and carrying plate 9 is mounted with the whole vehicle through the mounting holes 901.

The flange beam 107, the left and right boundary beams and the mounting plate 9 form C-shaped structures at two sides of the tray main body 1, so that the mode of the tray box body during use is enhanced, and as can be seen from simulation analysis of fig. 7, the mode of the whole tray box body is 65.5Hz at one step after a module is mounted on the tray box body and is far larger than 40Hz required to be achieved; secondly, the sealing surface of the tray box body is separated from the mounting surface of the tray box body, so that the air tightness of the tray box body can be better ensured, because the mounting plate 9 is directly contacted with the whole vehicle, the flatness of the mounting surface on the whole vehicle is generally poorer than that of the mounting surface of the tray box body of the battery pack, under the condition, if the mounting surface of the box body and the sealing surface of the tray box body are on the same plane like a pure-bottom-plate-type box body of a traditional commercial vehicle battery pack, a certain distortion is arranged on the sealing surface along with a mounting point when the battery pack is assembled, and the risk of reducing the air tightness level is reduced; if the sealed face of tray box and tray box carry the face separation, then sealed face can not be along with the load point undulation, then guaranteed the airtight grade of tray box.

The hooks 10 are further arranged on the outer sides of the left side beam 101 and the right side beam 102, the hooks 10 are horizontally arranged between the adjacent hanging and carrying plates 9 and longitudinally arranged between the flange beam 107 and the hanging and carrying plates 9, and the hooks 10 are used for further fixedly mounting the tray.

The front edge beam 103 and the rear edge beam 104 are welded on the tray main body 1 in an outer sealing welding mode, the tray main body 1 is symmetrically provided with a module front mounting beam 7 and a module rear mounting beam 8, and the front mounting beam 7 and the module rear mounting beam 8 are mounted on the inner sides of the front edge beam 103 and the rear edge beam 104 and used for mounting a battery module. The module rear mounting beam 8 is integrally formed with the rear side beam 104.

The battery package is installed on tray main part 1 through installation roof beam 7 before the module and installation roof beam 8 behind the module, tray main part 1 passes through flange roof beam 107 and case lid realization is sealed, tray main part 1 realizes with car connection through hanging support plate 9 and couple 10, the coolant liquid is got into behind water inlet 401 by water inlet nozzle 403, flow along second cooling water course 6, because every second cooling water course 6 width is the same, 6 both ends terminal surfaces of second cooling water course form to the inside indentation's of tray breach along water inlet 401 to delivery port 402 direction, so the flow of every second cooling water course 6 can be even, the velocity of flow can be balanced, whole flow resistance and whole pressure drop can be littleer, finally realize making the cooling effect of battery package better. The water inlet nozzle 403 and the water outlet nozzle 404 are arranged on the tray main body 1 outside the front edge beam 103, and the water outlet nozzle is arranged externally, so that the risk of thermal runaway of the battery pack caused by leakage is greatly reduced. The flange beam 107 and the mounting plate 9 form C-shaped structures on two sides of the tray main body 1, so that the overall mode and strength of the tray box body in use are increased, and the risk of reducing the air tightness level of the tray box body in use is reduced.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A battery pack tray, comprising: the tray comprises a tray main body (1), wherein a left side beam (101), a right side beam (102), a front side beam (103) and a rear side beam (104) are arranged on the tray main body (1), the tray main body (1) is provided with a hollow structure (2), first isolation structures (3) are arranged in the hollow structure (2) at intervals, a plurality of communicated first cooling water channels (4) are formed in the hollow structure through the first isolation structures (3), second isolation structures (5) with variable lengths are arranged in the first cooling water channels (4) at intervals, and a plurality of second cooling water channels (6) with the same width are formed in the first cooling water channels (4) through the second isolation structures (5); at the water inlet (401) and the water outlet (402) of the first cooling water channel (4), the second isolation structure (5) retracts towards the inside of the tray in sequence along the direction from the water inlet (401) to the water outlet (402); at the water channel communication part (405) of the first cooling water channel (4), the first isolation structure (3) and the second isolation structure (5) are sequentially retracted towards the inside of the tray along the direction from the water inlet (401) to the water outlet (402).

2. The battery pack tray of claim 1, wherein: the water inlet (401) and the water outlet (402) of the first cooling water channel (4) are respectively provided with a water inlet nozzle (403) and a water outlet nozzle (404), and the water inlet nozzle (403) and the water outlet nozzle (404) are arranged outside the front edge beam (103).

3. The battery pack tray of claim 1, wherein: the tray main body (1) is formed by welding a left integrated bottom plate (105) and a right integrated bottom plate (106), and the left integrated bottom plate (105) and the right integrated bottom plate (106) are integrally formed with a left side beam (101) and a right side beam (102) respectively.

4. The battery pack tray of claim 1, wherein: and flange beams (107) protruding outwards are arranged at the top ends of the left side beam (101), the right side beam (102), the front side beam (103) and the rear side beam (104).

5. The battery pack tray of claim 4, wherein: the hanging support plate (9) is arranged on the outer sides of the left side beam (101) and the right side beam (102) at intervals, and mounting holes (901) are formed in the hanging support plate (9).

6. The battery pack tray of claim 5, wherein: the hanging and carrying plate (9) is integrally formed with the left side beam (101) and the right side beam (102).

7. The battery pack tray of claim 6, wherein: the outer sides of the left side beam (101) and the right side beam (102) are further provided with a hook (10), the hook (10) is horizontally arranged between the adjacent hanging and carrying plates (9), and is longitudinally arranged between the flange beam (107) and the hanging and carrying plates (9).

8. The battery pack tray of claim 1, wherein: the tray is characterized in that a module front mounting beam (7) and a module rear mounting beam (8) are symmetrically arranged on the tray main body (1), and the module rear mounting beam (8) and the rear boundary beam (104) are integrally formed.