CN213093277U

CN213093277U - Battery pack and electric vehicle

Info

Publication number: CN213093277U
Application number: CN202022171954.2U
Authority: CN
Inventors: 修书董; 陈荣康; 张海建; 张德磊; 杨振宇
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-04-30
Anticipated expiration: 2030-09-28

Abstract

The utility model belongs to the technical field of the vehicle, a battery package, electric vehicle is disclosed. The battery pack includes: a housing; the liquid cooling plates are arranged in the shell, and two adjacent liquid cooling plates are abutted through an inserting structure; the quantity of electric core module is the same with the quantity of liquid cooling board, and a plurality of electric core module one-to-one set up on a plurality of liquid cooling boards. By adopting a split structure, the difficulty of battery pack assembly is greatly reduced, and the efficiency of pack assembly is improved. Because the size of each liquid cooling plate is smaller, the liquid cooling plate is easy to produce and process and has lower production and manufacturing cost. Each battery cell module and the corresponding liquid cooling plate form an independent module structure which can be independently installed and detached, and is convenient for after-sale maintenance. In addition, the plug-in structure realizes the spacing between two adjacent liquid cooling boards, avoids the liquid cooling board great offset to the support intensity of preferred has been provided. Meanwhile, the occupied space is reduced, and the space utilization rate of the whole package is improved.

Description

Battery pack and electric vehicle

Technical Field

The utility model relates to the field of vehicle technology, especially, relate to a battery package, electric vehicle.

Background

With the increasingly strict environmental requirements and the rapid development of technology, new energy vehicles are increasingly used in people's daily life. The pure electric vehicle is an important component of a new energy vehicle, and the pure electric vehicle adopts a battery as a power source, so the manufacturing cost and the use safety of the battery are critical factors for determining the future development of the pure electric vehicle.

In the production manufacturing process of the battery, the battery cell module can enter the battery pack box body after the bus bar is welded, and for the current battery pack without a module, the process of entering the box body needs a tool with extremely high precision. In addition, because the number of the battery cell modules is large, the flatness difference between different battery cell modules is easily caused, the risk of tearing the busbar is caused in the carrying process, and the qualification rate of the whole package is extremely low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery package, electric vehicle reduce the installation degree of difficulty, improve dress package speed and quality.

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

a battery pack, comprising:

a housing;

the liquid cooling plates are arranged in the shell, and two adjacent liquid cooling plates are abutted through an inserting structure;

the battery cell module, the quantity of battery cell module with the quantity of liquid cooling board is the same, and is a plurality of battery cell module one-to-one sets up in a plurality of on the liquid cooling board.

Preferably, the edges of two adjacent liquid cooling plates close to each other are in a wave-shaped structure or a zigzag structure to form the plug-in structure.

Preferably, one of the edges of two adjacent liquid cooling plates is provided with a protrusion, the other edge of the two adjacent liquid cooling plates is provided with a groove corresponding to the protrusion, and the protrusion is arranged in the groove.

Preferably, the protrusion is provided with a first connection hole, the bottom wall of the housing is provided with a second connection hole corresponding to the first connection hole, and the connecting members are respectively inserted into the first connection hole and the second connection hole.

Preferably, the battery cell module and the liquid cooling plate are connected through glue.

Preferably, each liquid cooling plate is internally provided with a cooling flow channel, and two ends of each cooling flow channel are respectively provided with a liquid inlet and a liquid outlet.

Preferably, the liquid inlet is respectively communicated with the plurality of cooling channels of the liquid cooling plate through a liquid inlet pipe, and the liquid outlet is respectively communicated with the plurality of cooling channels of the liquid cooling plate through a liquid outlet pipe.

Preferably, the housing comprises a frame and a beam arranged inside the frame, and the beam is used for bearing the liquid cooling plate.

Preferably, the battery cell module includes a busbar and a plurality of battery cell monomers, and a plurality of poles of the battery cell monomers are connected through the busbar.

In order to achieve the above object, the present invention further provides an electric vehicle including the above battery pack.

The utility model has the advantages that:

the utility model provides a battery pack, including casing, liquid cooling board and electric core module, the casing provides accommodation space for liquid cooling board and electric core module, has played the effect of whole protection. The liquid cooling plate is arranged in the shell, the battery cell module is arranged on the liquid cooling plate, and the liquid cooling plate is used for cooling and radiating the battery cell module.

The quantity of electric core module and the quantity of liquid cooling board are a plurality of, and a plurality of electric core module one-to-one sets up on a plurality of liquid cooling boards. Compared with the prior art, the liquid cooling plate with the larger size is divided into the liquid cooling plates with the smaller sizes, the electric core module with the larger size is divided into the electric core modules with the smaller sizes, and each electric core module is installed in the shell after the liquid cooling plates and then is installed in the shell, so that the split type structure is adopted, the difficulty of battery packaging assembly is greatly reduced, and the packaging efficiency is improved. Because the size of each liquid cooling plate is smaller, the liquid cooling plate is easy to produce and process and has lower production and manufacturing cost. Each battery cell module and the corresponding liquid cooling plate form an independent module structure which can be independently installed and detached, and is convenient for after-sale maintenance. In addition, the adjacent two liquid cooling plates are connected in an abutting mode through the inserting structure, the inserting structure achieves limiting between the adjacent two liquid cooling plates, large position deviation of the liquid cooling plates is avoided, and therefore better supporting strength is provided. Meanwhile, two adjacent liquid cooling plates are mutually inserted by utilizing an insertion structure, so that the occupied space is reduced, and the space utilization rate of the whole bag is improved.

The utility model also provides an electric vehicle, including foretell battery package, improve the yields of dress package speed and whole package, and the after-sales maintenance is independent module, reduces cost of maintenance.

Drawings

Fig. 1 is an exploded schematic view of a battery pack of the present invention;

fig. 2 is a top view of the battery pack of the present invention;

fig. 3 is a schematic structural view of a liquid cooling plate in the battery pack of the present invention;

fig. 4 is an installation schematic diagram of the battery pack cell module and the liquid cooling plate of the present invention;

FIG. 5 is a diagram illustrating the state of glue application on a liquid cooling plate of a battery pack according to the present invention;

fig. 6 is a schematic view of the battery pack according to the present invention, in which the battery cell module is fixed to the liquid cooling plate by using the limiting tool;

fig. 7 is a schematic diagram of a state in which the battery pack of the present invention uses the welding gun to weld the battery cell module;

fig. 8 is a state diagram of the battery pack cell module and the casing of the present invention.

In the figure:

100. limiting the tool; 200. a welding gun;

1. a housing; 2. a liquid-cooled plate; 3. a cell module; 4. glue;

11. a frame; 12. a cross beam;

21. a protrusion; 22. a groove; 211. a first connection hole; 23. a liquid inlet; 24. a liquid outlet; 25. a liquid inlet pipe; 26. a liquid outlet pipe.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The embodiment provides a battery pack, as shown in fig. 1, this battery pack includes casing 1, liquid cooling plate 2 and electric core module 3, and casing 1's whole appearance is similar to the cuboid structure, and casing 1 has played the effect of whole protection for liquid cooling plate 2 and electric core module 3 provide accommodation space. The casing 1 comprises a frame 11 and a beam 12, the frame 11 is of a rectangular ring structure, the beam 12 is arranged inside the frame 11, the beam 12 is used for bearing the liquid cooling plate 2, and the beam 12 plays a role in supporting the liquid cooling plate 2 and the cell module 3. The liquid cooling plate 2 is arranged in the shell 1, the battery cell module 3 is arranged on the liquid cooling plate 2, and the liquid cooling plate 2 is used for cooling and radiating the battery cell module 3.

If the size of the liquid cooling plate 2 and the battery cell module 3 is large, the liquid cooling plate 2 and the battery cell module 3 are limited by the inner space of the shell 1 in the process of being placed into the shell 1, so that the packaging difficulty is large. In order to solve the problem, the number of the battery cell modules 3 is the same as that of the liquid cooling plates 2, the number of the battery cell modules 3 and that of the liquid cooling plates 2 are both multiple, and the multiple battery cell modules 3 are arranged on the multiple liquid cooling plates 2 in a one-to-one correspondence manner. Compared with the prior art, divide into the less liquid cooling board 2 of a plurality of sizes with the great liquid cooling board 2 of size, divide into the less electric core module 3 of a plurality of sizes with the great electric core module 3 of size, install in casing 1 of packing into again behind liquid cooling board 2 at every electric core module 3, adopt split type structure, greatly reduced the degree of difficulty that the battery pack was joined in marriage, improved the efficiency of bagging-off. Because the size of each liquid cooling plate 2 is smaller, the liquid cooling plate is easy to produce and process, and the production and manufacturing cost is lower. Each battery cell module 3 and the corresponding liquid cooling plate 2 form an independent module structure which can be independently installed and disassembled, thereby being convenient for after-sale maintenance.

For convenience of description, the number of the liquid cooling plates 2 in the embodiment is preferably two, so as to divide a whole large liquid cooling plate 2 into two small liquid cooling plates 2, and the edges of two adjacent liquid cooling plates 2 may be of a straight structure, which is simple in structure. Because lack limit structure between the two, still need set up limit structure alone and carry on spacingly, manufacturing cost is higher. In order to solve the problem, the two adjacent liquid cooling plates 2 are connected in an abutting mode through the inserting structures, the inserting structures achieve limiting between the two adjacent liquid cooling plates 2, large position deviation of the liquid cooling plates 2 is avoided, and therefore better supporting strength is provided. Meanwhile, two adjacent liquid cooling plates 2 are mutually inserted by utilizing an insertion structure, so that the occupied space is reduced, and the space utilization rate of the whole package is improved.

Specifically, as shown in fig. 2 to 3, the insertion structure includes a protrusion 21 disposed on one of the two adjacent liquid-cooled plates 2, and a groove 22 disposed on the other of the two adjacent liquid-cooled plates 2, and the protrusion 21 is inserted into the groove 22. It should be particularly noted that, the number of the protrusions 21 and the grooves 22 is plural, and each protrusion 21 is correspondingly inserted into the corresponding groove 22, so as to ensure continuous overlapping between the edges of two adjacent liquid cooling plates 2, and the appearance is good while ensuring a good limiting effect.

It can be understood that, as shown in fig. 2-3, two adjacent liquid cooling plates 2 are connected with each other by a plurality of inserting structures, and the plurality of protrusions 21 and the plurality of grooves 22 are all saw-toothed as a whole, or are all wavy as a whole. It will be appreciated that if the projections 21 and recesses 22 are in the form of circular arcs, they form a wave-like structure; if the protrusions 21 and the recesses 22 are of a zigzag structure, a zigzag structure is formed. The wavy structure or the zigzag structure is used as the lap joint surface of two adjacent liquid cooling plates 2, and the liquid cooling plate has the following three functions, wherein one function is that the edges close to each other are of the following structure, so that the occupied space is reduced, and the space utilization rate is high; secondly, the two are mutually overlapped to provide good supporting strength; thirdly, the whole bag is convenient to mount and dismount.

In order to guarantee that liquid cooling plate 2 is putting into casing 1 after, the fixed effect between liquid cooling plate 2 and the casing 1, optionally, be provided with first connecting hole 211 on arch 21, correspond first connecting hole 211 at casing 1's diapire and be provided with the second connecting hole, the concrete bolt of connecting piece, first connecting hole 211 and second connecting hole are worn to locate respectively by the connecting piece. And the bolt is adopted for connection, so that the structure is simple, the use is convenient, and the installation and the maintenance are convenient. Wherein, the position of the bolt lock pair is arranged on the bulge 21, which aims to avoid the damage to the cooling flow passage inside the liquid cooling plate 2 when the bolt is connected.

Because liquid-cooling plate 2 is used for dispelling the heat to electric core module 3, be provided with the cooling runner in every liquid-cooling plate 2, as shown in fig. 3, be provided with inlet 23 and liquid outlet 24 respectively at the both ends of cooling runner, the cooling liquid flows in the back in getting into the cooling runner from inlet 23, flows from liquid outlet 24 again. Wherein, cooling flow channel can be snakelike structure or helical structure etc. and cooling flow channel's length is longer to take away electric core module 3's heat, the radiating effect is good.

The cooling flow channels in each liquid cooling plate 2 are independent cooling flow channels, the liquid inlet 23 is respectively communicated with the cooling flow channels of the plurality of liquid cooling plates 2 through a liquid inlet pipe 25, and the liquid outlet 24 is respectively communicated with the cooling flow channels of the plurality of liquid cooling plates 2 through a liquid outlet pipe 26. Wherein, feed liquor pipe 25 and drain pipe 26 set up in the outside of liquid cooling plate 2, and feed liquor pipe 25 and drain pipe 26 are external pipeline for collect at inlet 23 through feed liquor pipe 25 between two adjacent liquid cooling plates 2, collect at liquid outlet 24 through drain pipe 26. Two adjacent liquid-cooled boards 2 share a liquid inlet 23 and a liquid outlet 24, and compared with the mode that each liquid-cooled board 2 corresponds to a liquid inlet 23 and a liquid outlet 24, the number of the liquid inlets 23 and the liquid outlets 24 is reduced, which is beneficial to reducing the pressure drop of the liquid-cooled boards 2, thereby reducing the power.

As shown in fig. 4, the battery cell module 3 includes a busbar and a plurality of battery cell monomers, the side surfaces of two adjacent battery cell monomers are mutually attached, and the individual poles of the plurality of battery cells are connected through the busbar. Through setting up the busbar, connect into overall structure with a plurality of electric core monomers, be convenient for whole transport and installation. Because the both sides of electric core monomer respectively have a utmost point post, need weld its both sides respectively, because the space between two big modules is less, can't carry out welding operation, will wholly wrap the completion that divides into two electric core modules 3 welding operation of being convenient for, welding efficiency is high.

As shown in fig. 4, the cell module 3 is located above the liquid cooling plate 2, and the cell module 3 and the liquid cooling plate 2 are connected by glue 4. The glue 4 is specifically a heat-conducting structural adhesive, and the bonding effect is good. Adopt this kind of mode, can fix electric core module 3 on liquid cooling board 2 in advance, because liquid cooling board 2 and electric core module 3 glue the bonding through heat conduction structure, electric core module 3 is just fixed in liquid cooling board 2 particular position, and is fixed effectual. If do not fix between electric core module 3 and the liquid cooling board 2 in advance, in case electric core module 3 welds and accomplishes big module and hardly assembles with liquid cooling board 2 to the assembly degree of difficulty has been reduced.

The embodiment also provides a battery pack assembling method, which comprises the following steps:

1. as shown in fig. 5, glue 4 is coated on the liquid cooling plate 2 and stands for standby, and the limiting tool 100 is fixed on the liquid cooling plate 2 or other fixtures;

2. as shown in fig. 6, the limiting tool 100 is used to limit two ends of a plurality of single battery cells, so that the single battery cells are fixed to the liquid cooling plate 2 through the limiting tool 100, and the accuracy of the assembly position between the single battery cells and the liquid cooling plate 2 is ensured;

3. as shown in fig. 7, the bus bar is welded to the poles of the cell units using a welding gun 200 to complete the assembly of the cell module 3;

4. as shown in fig. 8, the welded battery cell module 3 and the liquid cooling plate 2 are placed into the casing 1 together through the tooling fixture, and the first connection hole 211 and the second connection hole are penetrated through by bolts, so as to fix the liquid cooling plate 2 in the casing 1;

5. repeating the steps 1-4 to sequentially place the plurality of cell modules 3 into the shell 1, wherein two adjacent liquid cooling plates 2 are abutted through an insertion structure;

6. the liquid inlet 23 is connected with two ends of a liquid inlet pipe 25, and the liquid outlet 24 is connected with two ends of a liquid outlet pipe 26.

According to the battery pack assembling method provided by the embodiment, each battery cell is fixed to the liquid cooling plate 2 through the limiting tool 100, the liquid cooling plate 2 plays a role in bearing the battery cell, glue 4 is coated on the liquid cooling plate 2, the liquid cooling plate 2 plays a role in initially fixing the battery cell, and meanwhile the limiting tool 100 plays a further limiting role to guarantee the positioning accuracy of the battery cell, and the installation accuracy is high. To weld electric core module 3 and liquid cooling plate 2 put into casing 1 through frock clamp jointly for electric core module 3 and liquid cooling plate 2 carry as overall structure, avoid appearing the condition of mutual dislocation, structural stability is good.

The embodiment also provides an electric vehicle, including foretell battery package, improve the speed of dress package and the yields of whole package, and the after sales maintenance is independent module, reduces cost of maintenance.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A battery pack, comprising:

a housing (1);

the liquid cooling plates (2) are arranged in the shell (1), and two adjacent liquid cooling plates (2) are abutted through an inserting structure;

the battery cell module (3), the quantity of battery cell module (3) with the quantity of liquid cooling board (2) is the same, and is a plurality of battery cell module (3) one-to-one sets up in a plurality of on liquid cooling board (2).

2. The battery pack according to claim 1, wherein the insertion structure comprises a protrusion (21) provided on one of the two adjacent liquid-cooled plates (2), and a groove (22) provided on the other of the two adjacent liquid-cooled plates (2), the protrusion (21) being inserted into the groove (22).

3. The battery pack according to claim 2, wherein two adjacent liquid cooling plates (2) are connected with each other through a plurality of insertion structures, and the plurality of protrusions (21) and the plurality of grooves (22) are all saw-toothed in shape or are all wavy in shape.

4. The battery pack according to claim 3, wherein a first connection hole (211) is provided on the protrusion (21), a second connection hole is provided on the bottom wall of the case (1) corresponding to the first connection hole (211), and a connection member is respectively inserted through the first connection hole (211) and the second connection hole.

5. The battery pack according to claim 1, characterized in that the cell module (3) and the liquid-cooled plate (2) are connected by means of glue (4).

6. The battery pack according to claim 1, wherein each of the liquid-cooling plates (2) has a cooling channel provided therein, and a liquid inlet (23) and a liquid outlet (24) are provided at both ends of the cooling channel, respectively.

7. The battery pack according to claim 6, wherein the liquid inlet (23) is connected to the cooling channels of the liquid-cooled plates (2) through a liquid inlet pipe (25), and the liquid outlet (24) is connected to the cooling channels of the liquid-cooled plates (2) through a liquid outlet pipe (26).

8. Battery pack according to any of claims 1 to 7, characterized in that the housing (1) comprises a rim (11) and a cross beam (12) arranged inside the rim (11), the cross beam (12) being adapted to carry the liquid-cooled panel (2).

9. The battery pack according to any of claims 1 to 7, wherein the cell module (3) comprises a busbar and a plurality of cell units, and the poles of the plurality of cell units are connected by the busbar.

10. An electric vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.