CN213988999U

CN213988999U - Ultra-thin battery box body of integrated liquid cooling board

Info

Publication number: CN213988999U
Application number: CN202120214276.5U
Authority: CN
Inventors: 张炫东; 洪礼昌; 张亚辉; 郑隆; 陈福恩
Original assignee: Xiamen Jinlong Automobile New Energy Technology Co ltd
Current assignee: Xiamen Jinlong Automobile New Energy Technology Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-08-17
Anticipated expiration: 2031-01-26

Abstract

The utility model discloses an ultra-thin battery box body integrated with a liquid cooling plate, which comprises the liquid cooling plate, a front side plate, a rear side plate, a left side plate and a right side plate which are welded and fixed on the peripheral edge of the liquid cooling plate, wherein the liquid cooling plate comprises a bottom plate, an interface, a front plugging plate and a rear plugging plate; a flow channel for cooling liquid to flow is arranged in the bottom plate, and interfaces are arranged at the inlet and the outlet of the flow channel; the left and right sides of bottom plate has set firmly left side board and right side board through friction stir welding respectively, and both sides set firmly through friction stir welding respectively around the bottom plate preceding closure plate and back closure plate to preceding closure plate and back closure plate weld respectively and set firmly in preceding curb plate and posterior lateral plate. The utility model discloses four limits of well bottom plate all adopt friction stir welding to the welding is continuous, and the welding seam does not have stress concentration point, has reduced the risk that the bottom plate was welded and worn, and intensity is high, and good reliability has realized the high integration of liquid cooling board with the battery box, has reduced the weight and the height of battery package effectively, helps realizing ultra-thin battery design.

Description

Ultra-thin battery box body of integrated liquid cooling board

Technical Field

The utility model belongs to the technical field of the new energy automobile technique and specifically relates to an ultra-thin battery box of cold board of integrated liquid.

Background

In order to realize heat management and timely dissipate heat of the battery, a liquid cooling system is usually arranged on a battery box body of the conventional electric motor coach. The common liquid cooling system comprises a separately assembled liquid cooling system and a liquid cooling system integrated on the battery box body. The liquid cooling system with the integrated design can save space, reduce weight and reduce production cost, so that the development trend of light weight and low cost of the existing electric motor coach is met. The battery box body integrated with the liquid cooling system is formed by connecting aluminum extruded sections through friction stir welding and arc welding tailor welding, but because the number of battery parts is large, the welding seams are also large, the stress concentration condition exists in the welding seams, and the liquid cooling plate is easily welded through, so that the liquid leakage risk is caused.

Disclosure of Invention

The utility model provides an ultra-thin battery box of cold board of integrated liquid, its main aim at solves above-mentioned problem.

The utility model adopts the following technical scheme:

an ultrathin battery box body integrated with a liquid cooling plate comprises the liquid cooling plate, a front side plate, a rear side plate, a left side plate and a right side plate, wherein the front side plate, the rear side plate, the left side plate and the right side plate are welded and fixed on the peripheral edges of the liquid cooling plate; a flow passage for cooling liquid to flow is arranged in the bottom plate, and the inlets and the outlets of the flow passage are provided with the interfaces; the left and right sides of above-mentioned bottom plate sets firmly above-mentioned left side board and right side board through friction stir welding respectively, and both sides set firmly above-mentioned preceding closure plate and back closure plate through friction stir welding respectively around the bottom plate to above-mentioned preceding closure plate and back closure plate weld respectively set firmly in above-mentioned preceding curb plate and posterior lateral plate.

Further, both sides wall all is equipped with the mounting groove around the above-mentioned bottom plate, and the lateral wall of above-mentioned preceding closure plate and back closure plate all is equipped with the lug with above-mentioned mounting groove looks adaptation.

Further, the bottom plate comprises a plurality of sub-bottom plates fixed through friction stir welding, the flow channels are arranged in each sub-bottom plate, and the end parts of the side walls of every two adjacent sub-bottom plates are provided with flow channel grooves communicated with the flow channels.

Furthermore, the number of the sub-bottom plates is 2-4, the left side plate is fixedly arranged on the leftmost sub-bottom plate through friction stir welding, and the right side plate is fixedly arranged on the rightmost sub-bottom plate through friction stir welding.

Furthermore, the upper end face of the bottom plate is welded with an installation beam convenient for installing the battery module, and the bottom of the installation beam is provided with a process groove used for dispersing the energy of the welding line.

Further, a plurality of mounting brackets are fixedly arranged on the outer side walls of the left side plate and the right side plate; the bottom surface of the bottom plate is slightly higher than the bottom surface of the mounting bracket.

Furthermore, the height difference between the bottom surface of the bottom plate and the bottom surface of the mounting bracket is 0.5-5 mm.

Compared with the prior art, the utility model discloses the beneficial effect who produces lies in:

1. the utility model provides an ultra-thin battery box of cold board of integrated liquid simple structure, four limits of bottom plate all adopt the friction stir welding to the welding is continuous, and the welding seam unstressed concentration point has reduced the risk that the bottom plate was welded and has worn, and intensity is high, the good reliability. Furthermore, the utility model discloses a liquid cooling board highly integrates with the battery box, has reduced the weight and the height of battery package effectively, helps realizing ultra-thin battery design, can be applied to well on the front and back axle chassis of one-level commercial car of marking time.

2. The utility model discloses both sides wall all is equipped with the mounting groove around the bottom plate, and preceding closure plate and back closure plate all are equipped with the lug with mounting groove looks adaptation, can realize from this that the closely cooperation of bottom plate and preceding closure plate and back closure plate ensures thoroughly sealed, prevents the weeping phenomenon from appearing.

3. The utility model discloses it has the installation roof beam of installation battery module of being convenient for to weld at the bottom plate up end to the process groove is seted up with the overlap joint department of bottom plate to the installation roof beam, can draw process groove department with the energy part of welding seam from this, thereby reduces the risk that the bottom plate was welded and wears, and then effectively improves holistic structural strength and stability.

4. The utility model discloses there is certain difference in height in the bottom surface of well bottom plate and the bottom surface of installing support, can make battery bottom half and frame plane have certain gap from this to help realizing the heat dissipation, and can prevent effectively that bottom plate and frame plane from transmitting the heat because of direct contact.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic structural diagram of the neutron bottom plate of the present invention.

Fig. 4 is a schematic structural view of the middle mounting beam of the present invention.

Fig. 5 is a right side view of the present invention.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent to one skilled in the art that the present invention may be practiced without these details.

Referring to fig. 1 to 3, an ultra-thin battery case integrated with a liquid cooling plate includes a liquid cooling plate 1, and a front side plate 2, a rear side plate 3, a left side plate 4 and a right side plate 5 welded and fixed to the peripheral edges of the liquid cooling plate 1; the liquid cooling plate 1 comprises a bottom plate 11, a connector 12, a front blocking plate 13 and a rear blocking plate 14; a flow passage (not shown) for the cooling liquid to flow is arranged in the bottom plate 11, and interfaces 12 are arranged at the inlet and the outlet of the flow passage; the left and right sides of bottom plate 11 has set firmly left side board 4 and right side board 5 through friction stir welding respectively, and both sides set firmly preceding closure plate 13 and back closure plate 14 through friction stir welding respectively around bottom plate 11 to preceding closure plate 13 and back closure plate 14 weld respectively and set firmly in preceding curb plate 2 and posterior lateral plate 3. The utility model discloses simple structure, four limits of bottom plate 11 all adopt friction stir welding to the welding is continuous, and the welding seam does not have stress concentration point, has reduced the risk that bottom plate 11 was welded and is worn, and intensity is high, the good reliability. Furthermore, the utility model discloses a liquid cooling plate 1 highly integrates with the battery box, has reduced the weight and the height of battery package effectively, helps realizing ultra-thin battery design, can be applied to well on the front and back axle chassis of one-level commercial car of marking time.

Referring to fig. 1 to 3, the bottom plate 11 includes a plurality of sub-bottom plates 111 fixed by friction stir welding, a flow channel is disposed in each sub-bottom plate 111, and a flow channel groove 112 communicated with the flow channel is disposed at an end of a side wall of each of two adjacent sub-bottom plates 111. In order to realize the light weight design, the bottom plate 11 is usually made of an aluminum extruded section, but the aluminum extruded section is influenced by the production process and the production cost, and the width is often small, so that the bottom plate 11 needs to be spliced by a plurality of sub-bottom plates 111, and the width requirement of the battery box body can be met. The number of sub-base plates 222 is typically 2-4, and may be adjusted during the manufacturing process according to the actual specifications of the battery case. Preferably, the number of the sub-bottom plates 111 in this embodiment is 3, and the left side plate 4 is fixedly arranged on the leftmost sub-bottom plate 111 by friction stir welding, and the right side plate 3 is fixedly arranged on the rightmost sub-bottom plate 111 by friction stir welding.

Referring to fig. 1 to 3, both sides wall all is equipped with mounting groove 110 around each sub-bottom plate 111, the lateral wall of preceding closure plate 13 and back closure plate 14 all is equipped with the lug 131 with mounting groove 110 looks adaptation, install in both sides around each sub-bottom plate 111 with preceding closure plate 13 and back closure plate 14 during the installation earlier, make lug 131 insert locate in mounting groove 110, thereby make each sub-bottom plate 111 closely cooperate with preceding closure plate 13 and back closure plate 14, play the effect of preliminary sealing bottom plate, adopt friction stir welded fastening again, thereby play thoroughly sealed effect, the weeping phenomenon prevents to appear.

Referring to fig. 1 to 3, the front side plate 2 or the rear side plate 3 is provided with a mounting hole 31, one end of the interface 12 is fixedly arranged at an inlet or an outlet of the runner on the bottom plate 11, and the other end is assembled in the mounting hole 31 and is subjected to full-length welding, so that the inside of the battery box body meets the requirement of the airtightness of the whole machine.

Referring to fig. 1 to 4, an installation beam 15 for facilitating installation of a battery module is welded to the upper end surface of the base plate 11, and a process groove 151 for dispersing energy of a welding line is formed at the bottom of the installation beam 15. The process groove 151 is formed in the lap joint of the mounting beam 15 and the bottom plate 11, and energy of a welding seam can be locally led to the process groove 151, so that the risk that the bottom plate 11 is welded through is reduced, and the overall structural strength and stability are effectively improved.

Referring to fig. 5, a plurality of mounting brackets 41 are fixedly arranged on the outer side walls of the left side plate 4 and the right side plate 5; the bottom surface of the base plate 11 is slightly higher than the bottom surface of the mounting bracket 41. Preferably, the height difference H between the bottom surface of the base plate 11 and the bottom surface of the mounting bracket 41 is 0.5-5 mm. During the installation, the battery box sets firmly on the frame through the installing support 41 of left and right sides, because the difference in height design of bottom can make battery box bottom and frame plane have certain gap to help realizing the heat dissipation, and can prevent effectively that bottom plate 11 and frame plane from transmitting the heat because of direct contact, during actual production, but this gap department can spray thermal insulation material such as PVC and protective material, but the coating height of noticing the spraying can not be higher than above-mentioned difference in height.

The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.

Claims

1. The utility model provides an ultra-thin battery box of integrated liquid cooling board, includes liquid cooling board and welded fastening in preceding curb plate, posterior lateral plate, left side board and the right side board of liquid cooling board edge all around, its characterized in that: the liquid cooling plate comprises a bottom plate, an interface, a front blocking plate and a rear blocking plate; a flow channel for cooling liquid to flow is arranged in the bottom plate, and the inlets and the outlets of the flow channel are provided with the connectors; the left and right sides of bottom plate has set firmly through friction stir welding respectively left side board and right side board, both sides have set firmly through friction stir welding respectively around the bottom plate preceding closure plate and back closure plate, and preceding closure plate and back closure plate weld respectively set firmly in preceding curb plate and posterior lateral plate.

2. The ultra-thin battery case of an integrated liquid cooling plate of claim 1, wherein: the wall all is equipped with the mounting groove around the bottom plate, the lateral wall of preceding closure plate and back closure plate all be equipped with the lug of mounting groove looks adaptation.

3. The ultra-thin battery case of an integrated liquid cooling plate of claim 1, wherein: the bottom plate comprises a plurality of sub-bottom plates fixed through friction stir welding, the flow channels are arranged in each sub-bottom plate, and the end parts of the side walls of every two adjacent sub-bottom plates are provided with flow channel grooves communicated with the flow channels.

4. The ultra-thin battery case of an integrated liquid cooling plate of claim 3, wherein: the number of the sub-bottom plates is 2-4, the left side plate is fixedly arranged on the leftmost sub-bottom plate through friction stir welding, and the right side plate is fixedly arranged on the rightmost sub-bottom plate through friction stir welding.

5. The ultra-thin battery case of an integrated liquid cooling plate of claim 1, wherein: the upper end face of the bottom plate is welded with an installation beam convenient for installing the battery module, and the bottom of the installation beam is provided with a process groove used for dispersing the energy of a welding line.

6. The ultra-thin battery case of an integrated liquid cooling plate of claim 1, wherein: the outer side walls of the left side plate and the right side plate are fixedly provided with a plurality of mounting brackets; the bottom surface of bottom plate is a little higher than the bottom surface of installing support.

7. The ultra-thin battery case of an integrated liquid cooling plate of claim 6, wherein: the height difference between the bottom surface of the bottom plate and the bottom surface of the mounting bracket is 0.5-5 mm.