CN212113843U

CN212113843U - Battery package drain pan and battery package shell

Info

Publication number: CN212113843U
Application number: CN202021235052.4U
Authority: CN
Inventors: 马腾; 范凯; 王旭东; 王森
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-12-08
Anticipated expiration: 2030-06-29

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack bottom shell and a battery pack shell, wherein the battery pack bottom shell comprises a bottom plate and an enclosing frame, a cooling channel for a cooling medium to pass through is arranged in the bottom plate, and the cooling channel is provided with a channel inlet and a channel outlet for the cooling medium to pass in and out respectively; the port department of enclosing the frame sets up the bottom plate, enclose the frame with the bottom plate limits jointly the battery wraps the drain pan, and be provided with the coolant inlet and the coolant outlet that supply respectively the coolant business turn over on enclosing the frame, wherein: the cooling medium inlet is communicated with the channel inlet, and the cooling medium outlet is communicated with the channel outlet. The battery pack bottom shell is integrated with the cooling channel, the whole structure is simple, and the light weight of the battery pack is favorably realized. Through set up above-mentioned battery package drain pan in the battery package shell, can effectively cool off battery module to the lightweight of battery package has been realized.

Description

Battery package drain pan and battery package shell

Technical Field

The utility model relates to a battery technology field specifically relates to battery package drain pan and battery package shell.

Background

With the current social energy crisis becoming more serious, new energy automobiles are more and more concerned by society, and electric automobiles are more concerned. Taking an electric automobile as an example, batteries are widely used in electric automobiles, and the batteries can provide electric energy for driving motors of the electric automobiles. Because the battery can release a large amount of heats at the charge-discharge in-process, if these heats can't in time be discharged, can cause the heat to gather to produce the safety problem, in addition, the multiplying power performance and the life of electric core still can be influenced in the rising of temperature, thereby reduce battery system's reliability, security and life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery package drain pan, this battery package drain pan is gone up to integrate has cooling channel, and overall structure is simple, does benefit to the lightweight that realizes the battery package.

In order to achieve the above object, an aspect of the present invention provides a battery pack bottom case, the battery pack bottom case includes:

the cooling device comprises a bottom plate, a cooling channel and a cooling device, wherein the bottom plate is internally provided with a cooling channel for a cooling medium to pass through, and the cooling channel is provided with a channel inlet and a channel outlet for the cooling medium to enter and exit respectively; and

enclose the frame, enclose the port department of frame and set up the bottom plate, enclose the frame with the bottom plate is injectd jointly the battery package drain pan to be provided with on the frame and supply respectively cooling medium import and cooling medium export that cooling medium passed in and out, wherein: the cooling medium inlet is communicated with the channel inlet, and the cooling medium outlet is communicated with the channel outlet.

Above-mentioned technical scheme is through integrated cooling channel in the bottom plate at battery package drain pan to set up cooling medium import and cooling medium export on enclosing the frame, thereby not only can effectively cool off the battery module, simplified battery package structure moreover, realized the lightweight of battery package simultaneously.

Preferably, the bottom case of the battery pack comprises a plurality of cooling channels arranged in the bottom plate, and the plurality of cooling channels are distributed along the length direction of the battery modules of the battery pack.

Preferably, a first channel extending along the length direction of the battery module is arranged in the bottom plate, and the first channel can communicate the channel inlet and the cooling medium inlet.

Preferably, the first channel is tapered in a direction along the flow of the cooling medium within the first channel; and/or

The size of the plurality of cooling channels in the length direction of the battery module is gradually reduced in the direction along the flow of the cooling medium in the first channel.

Preferably, a second channel extending in the length direction of the battery module is arranged in the bottom plate, and the second channel can communicate the channel outlet and the cooling medium outlet.

Preferably, the bottom plate comprises a first bottom plate and a second bottom plate which are opposite to each other at intervals, the first bottom plate, the second bottom plate and the peripheral wall of the enclosure frame jointly enclose to form an inner cavity, the bottom plate comprises a plurality of partition plates which are arranged in the inner cavity and distributed at intervals along the length direction of the battery module, and the cooling channel is formed between the adjacent partition plates; wherein:

gaps are reserved between the two ends of the partition plate and the corresponding inner walls of the enclosure frames respectively to collect to form the first channel and the second channel respectively.

Preferably, the first base plate has an extension portion extending beyond the second base plate to form a mounting region for a battery distribution box capable of mounting the battery pack, the base plate further includes a first side plate connecting a side of the second base plate close to the mounting region and the first base plate, the second base plate, the first side plate and the corresponding inner wall of the enclosure frame together enclose the inner cavity.

Preferably, a weight reduction chamber is arranged in the enclosure frame; and/or

The cooling medium inlet is arranged on the part, located in the mounting area, of the enclosing frame, the first side plate is provided with a mounting port communicated with the first channel, and the battery pack bottom shell comprises a communicating pipe connected with the cooling medium inlet and the mounting port.

Preferably, the battery pack bottom shell comprises a support frame which is arranged on the bottom plate and can transversely cross the battery module, and a mounting surface for mounting a battery management system of the battery pack is formed on the surface of the support frame, which is far away from the battery module.

The utility model discloses the second aspect provides a battery package shell, battery package shell includes that battery package drain pan and lid are located the last casing of battery package drain pan, battery package drain pan does the utility model provides a battery package drain pan. Through setting up in battery package shell the utility model provides a battery package drain pan can effectively cool off the battery module to make battery package shell's simple structure, realized the lightweight of battery package.

Drawings

Fig. 1 is a schematic perspective view of a battery pack case according to a preferred embodiment of the present invention applied to a battery pack;

fig. 2 is a schematic view of an exploded structure of the battery pack shown in fig. 1;

fig. 3 is a structural diagram of an application state of a bottom case of a battery pack according to a preferred embodiment of the present invention, wherein a battery module and a battery distribution box are disposed on the bottom case of the battery pack;

fig. 4 is a schematic perspective view of a bottom case of a battery pack according to a preferred embodiment of the present invention;

fig. 5 is a schematic perspective view of a bottom plate of the bottom case of the battery pack shown in fig. 4;

FIG. 6 is a schematic cross-sectional view of the base plate shown in FIG. 5;

FIG. 7 is a side view of the base plate of FIG. 5;

fig. 8 is a schematic sectional view of a bottom plate according to another preferred embodiment of the present invention;

fig. 9 is a side view schematically illustrating the structure of the bottom plate according to another preferred embodiment of the present invention.

Description of the reference numerals

10-battery pack bottom case; 12-a base plate; 110-a first backplane; 112-a second backplane; 113-a mounting port; 114-a first side panel; 116-a second side panel; 118-a divider plate; 120-a cooling channel; 122-channel inlet; 124-channel outlet; 126 — first channel; 128-a second channel; 14-enclosing a frame; 140-cooling medium outlet; 16-communicating tube; 160-a first flange face; 18-a delivery pipe; 180-a second flange face; 19-a support frame; 190-a mounting surface; 20-a battery pack; 22-a battery module; 24-a battery pack housing; 26-an upper shell; 28-a battery distribution box; 29-battery management system.

Detailed Description

In the present invention, the use of directional terms such as "upper, lower, left and right" in the absence of a contrary explanation generally means that the directions shown in the drawings and the practical application are understood, and "inner and outer" mean inner and outer of the outline of the component.

As shown in fig. 1, fig. 2 and fig. 3, the battery pack 20 includes a battery pack case 24, a battery module 22 is enclosed in the battery pack case 24, a plurality of battery cells may be arranged in the battery module 22 in parallel, the arrangement direction of the battery cells is the length direction of the battery module 22, and a battery distribution box 28 and a battery management system 29 are further arranged in the battery pack 20. Here, the horizontal direction perpendicular to the longitudinal direction of the battery module 22 is the width direction of the battery module 22.

The utility model provides a battery pack bottom shell, battery pack bottom shell 10 includes bottom plate 12, is provided with in the bottom plate 12 and supplies cooling medium such as cooling air to pass through cooling channel 120, as shown in fig. 6, is equipped with passageway import 122 and passageway export 124 that supplies respectively the cooling medium business turn over on cooling channel 120, for example, the both ends of cooling channel 120 form into the opening form in order to form passageway import 122 and passageway export 124 respectively, wherein, cooling channel 120 can extend along the width direction of battery module 22; the battery bottom case 10 further includes a surrounding frame 14, it should be noted that two ends of the surrounding frame 14 are formed into an open shape, a bottom plate 12 is disposed at a port of the surrounding frame 14, the surrounding frame 14 and the bottom plate 12 jointly define the battery bottom case 10, the surrounding frame 14 and the bottom plate 12 can jointly enclose an accommodating chamber capable of accommodating the battery module 22, and a cooling medium inlet and a cooling medium outlet 140 for the cooling medium to enter and exit are disposed on the surrounding frame 14, wherein: the cooling medium inlet is communicated with the channel inlet 122, and the cooling medium outlet 140 is communicated with the channel outlet 124, and it is understood that the cooling medium is introduced into the cooling channel 120 through the cooling medium inlet and then discharged through the cooling medium outlet 140, thereby completing the cooling operation of the battery module 22. By integrating the cooling channel 120 in the bottom plate 12 of the battery pack bottom case 10 and providing the cooling medium inlet and outlet 140 on the surrounding frame 16, the battery module 22 can be effectively cooled, the structure of the battery pack 20 is simplified, and the light weight of the battery pack 20 is realized.

In order to enhance the cooling effect, a plurality of cooling channels 120 may be provided in the base plate 12, and the plurality of cooling channels 120 may be distributed along the length direction of the battery modules 22 of the battery pack 20.

As shown in fig. 6, a first passage 126 extending in the length direction of the battery module 22 may be provided in the base plate 12, the first passage 126 being capable of communicating the passage inlet 122 with the cooling medium inlet. By providing first passage 126, it may be convenient to place passage inlet 122 in communication with the cooling medium inlet. It should be noted that the peripheral wall of the bottom plate 12 can be hermetically connected to the inner wall of the enclosure frame 14, so that the cooling medium, such as cooling air, enters from the cooling medium inlet, enters the corresponding cooling channels 120 through the first channels 126, and is discharged from the cooling medium outlet 140.

Wherein the first channel 126 may be tapered in the direction of the flow of the cooling medium in the first channel 126, and the first channel 126 may be tapered, so that the flow rate of the cooling medium in the cooling channel 120 can be kept substantially uniform, thereby improving the cooling uniformity. As oriented in fig. 8, the cooling medium may flow generally from the right side to the left side as viewed in fig. 8. When the first channels 126 are tapered as shown in fig. 8 and 9 in combination, the dimensions of the respective cooling channels 120 in the length direction of the battery module 22 are preferably equal.

As shown in fig. 6, in order to keep the flow rate of the cooling medium in the cooling passages 120 uniform, the dimension of the plurality of cooling passages 120 in the length direction of the battery modules 22 may be gradually reduced in the direction along the flow of the cooling medium in the first passages 126, thereby allowing the battery modules 22 to be uniformly cooled, improving the cooling effect. As seen in conjunction with the orientations shown in fig. 6 and 7, the cooling medium as a whole can flow from the right side to the left side as shown in the drawings, whereby the dimensions of the plurality of cooling channels 120 in the length direction of the battery module 22 gradually decrease in the direction from the right side to the left side.

In addition, a second channel 128 extending in the longitudinal direction of the battery module 22 may be provided in the bottom plate 12, and the second channel 128 may be capable of communicating the channel outlet 124 and the cooling medium outlet 140. The communication between the passage outlet 124 and the cooling medium inlet is facilitated by the provision of the second passage 128. It should be noted that the peripheral wall of the bottom plate 12 can be hermetically connected to the inner wall of the enclosure frame 14, so that the cooling medium, such as cooling air, enters from the cooling medium inlet, enters the corresponding cooling channels 120 through the first channels 126, and then exits from the cooling medium outlet 140 through the second channels 128.

As shown in fig. 4 and 5, the bottom plate 12 may include a first bottom plate 110 and a second bottom plate 112 spaced apart from each other and facing each other, the first bottom plate 110, the second bottom plate 112 and the peripheral wall of the enclosure frame 14 together enclose an inner cavity, the bottom plate 12 may include a plurality of partition plates 118 disposed in the inner cavity and spaced apart along the length direction of the battery module 22, and a cooling channel 120 may be formed between adjacent partition plates 118; wherein: both ends of the partition plate 118 may be respectively spaced apart from the corresponding inner walls of the enclosure frame 14 to respectively form a first channel 126 and a second channel 128, and it is understood that a first gap is disposed between the first end of the partition plate 118 and the inner wall of the enclosure frame 14 facing the first end, such that a plurality of said first gaps are collected to form the first channel 126, and a second gap is disposed between the second end of the partition plate 118 and the inner wall of the enclosure frame 14 facing the second end, such that a plurality of said second gaps are collected to form the second channel 128.

In order to fully utilize the space on the bottom case 10 of the battery pack, the first bottom board 110 has an extension portion extending beyond the second bottom board 112 to form a mounting area for the battery distribution box 28 capable of mounting the battery pack 20, that is, the dimension of the first bottom board 110 in the length direction of the battery module 22 is larger than the dimension of the second bottom board 112 in the length direction of the battery module 22, and by providing the extension portion, the mounting of the components of the battery pack 20 can be facilitated, as shown in fig. 5, the bottom board 12 further includes a first side board 114 connecting one side, that is, the first side, of the second bottom board 112 close to the mounting area and the first bottom board 110, and the respective inner walls of the first bottom board 110, the second bottom board 112, the first side board 114 and the enclosure frame 14 can together enclose the inner cavity. In addition, a second side plate 116 may be disposed between a second side of the second bottom plate 112 opposite to the first side and the first bottom plate 110, whereby the first bottom plate 110, the second bottom plate 112, the first side plate 114, the second side plate 116 and the corresponding inner wall of the enclosure frame 14 may together enclose the inner cavity. A second side panel 116 is provided to facilitate attachment of the base panel 12 to the enclosure frame 14.

In addition, a weight-reducing chamber may be provided within the enclosure frame 14, which may reduce the weight of the battery pack 20 and increase the energy density of the battery pack 20.

As shown in fig. 4 and 5, the cooling medium inlet may be provided at a portion of the enclosure frame 14 located at the mounting area, as shown in fig. 6 and 8, a mounting port 113 communicating with the first channel 126 may be provided on the first side plate 114, and a communicating pipe 16 connecting the cooling medium inlet and the mounting port 113 may be provided. To facilitate the installation between the communication pipe 16 and the cooling medium inlet of the enclosure frame 14, as shown in fig. 2, a first flange surface 160 may be provided on the outer wall of the communication pipe 16, and the first flange surface 160 may be attached to the wall of the enclosure frame 14.

Further, as shown in fig. 4, the delivery pipe 18 may be provided at the cooling medium outlet 140 to facilitate the discharge of the cooling medium, and a second flange surface 180 may be provided at an outer wall of the delivery pipe 18, and the second flange surface 180 may be attached to the wall of the enclosure frame 14, thereby facilitating the installation between the delivery pipe 18 and the cooling medium inlet of the enclosure frame 14.

As shown in fig. 2 and 3, a support frame 19 capable of crossing over the battery module 22 may be provided on the bottom plate 12, and a surface of the support frame 19 facing away from the battery module 22 may form a mounting surface 190 for mounting the battery management system 29 of the battery pack 20, thereby improving utilization of the internal space of the battery pack 20 and making the entire structure more compact.

The utility model also provides a battery package shell, battery package shell 24 include battery package drain pan 10 and lid and locate the last casing 26 of battery package drain pan 10, and battery package drain pan 10 does the utility model provides a battery package drain pan 10. Through setting up in battery package shell 24 the utility model provides a battery package drain pan 10 can carry out effective cooling to battery module 22 to make battery package shell 24's simple structure, realized the lightweight of battery package 20.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, makes up with any suitable mode including each concrete technical feature. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. A battery pack bottom case (10), comprising:

the cooling device comprises a bottom plate (12), wherein a cooling channel (120) for a cooling medium to pass through is arranged in the bottom plate (12), and a channel inlet (122) and a channel outlet (124) for the cooling medium to enter and exit are respectively arranged on the cooling channel (120); and

an enclosure frame (14), the bottom plate (12) is disposed at a port of the enclosure frame (14), the enclosure frame (14) and the bottom plate (12) jointly define the battery bottom case (10), and a cooling medium inlet and a cooling medium outlet (140) for the cooling medium to enter and exit are disposed on the enclosure frame (14), respectively, wherein: the cooling medium inlet communicates with the passage inlet (122), and the cooling medium outlet (140) communicates with the passage outlet (124).

2. The battery pack bottom case according to claim 1, wherein the battery pack bottom case (10) comprises a plurality of cooling channels (120) disposed in the bottom plate (12), and the plurality of cooling channels (120) are distributed along a length direction of the battery modules (22) of the battery pack (20).

3. The battery pack bottom case according to claim 2, wherein a first channel (126) extending along the length direction of the battery module (22) is provided in the bottom plate (12), and the first channel (126) can communicate the channel inlet (122) and the cooling medium inlet.

4. The battery pack bottom case of claim 3, wherein the first channel (126) is tapered in a direction along the flow of the cooling medium within the first channel (126); and/or

The dimension of the plurality of cooling channels (120) in the length direction of the battery module (22) decreases stepwise in the direction of the flow of the cooling medium in the first channel (126).

5. The battery pack bottom case according to claim 3, wherein a second channel (128) extending along the length direction of the battery module (22) is provided in the bottom plate (12), and the second channel (128) can communicate the channel outlet (124) and the cooling medium outlet (140).

6. The battery bottom cladding shell of claim 5, wherein the bottom plate (12) comprises a first bottom plate (110) and a second bottom plate (112) which are spaced and opposite to each other, the first bottom plate (110), the second bottom plate (112) and the peripheral wall of the enclosure frame (14) jointly enclose to form an inner cavity, the bottom plate (12) comprises a plurality of partition plates (118) which are arranged in the inner cavity and distributed at intervals along the length direction of the battery module (22), and the cooling channel (120) is formed between the adjacent partition plates (118); wherein:

gaps are reserved between two ends of the partition plate (118) and the corresponding inner walls of the enclosure frame (14) respectively to form the first channel (126) and the second channel (128) in a converging mode.

7. The battery pack bottom case of claim 6, wherein the first bottom plate (110) has an extension that extends beyond the second bottom plate (112) to form a mounting area for a battery distribution box (28) that can mount the battery pack (20), the bottom plate (12) further comprising a first side plate (114) that connects a side of the second bottom plate (112) near the mounting area and the first bottom plate (110), the second bottom plate (112), the first side plate (114), and corresponding inner walls of the enclosure frame (14) collectively enclosing the inner cavity.

8. The battery bottom case according to claim 7, wherein a weight-reducing chamber is provided in the enclosure frame (14); and/or

The cooling medium inlet is arranged on the part, located in the mounting area, of the surrounding frame (14), the first side plate (114) is provided with a mounting opening (113) communicated with the first channel (126), and the battery pack bottom shell (10) comprises a communicating pipe (16) connected with the cooling medium inlet and the mounting opening (113).

9. The battery pack bottom case according to claim 7, wherein the battery pack bottom case (10) comprises a support frame (19) which is arranged on the bottom plate (12) and can cross the battery modules (22), and a surface of the support frame (19) facing away from the battery modules (22) forms a mounting surface (190) for mounting a battery management system (29) of the battery pack (20).

10. A battery pack case, characterized in that the battery pack case (24) comprises a battery pack bottom case (10) and an upper shell (26) covering the battery pack bottom case (10), and the battery pack bottom case (10) is the battery pack bottom case (10) as claimed in any one of claims 1 to 9.