CN214124038U

CN214124038U - Battery module, battery package and vehicle

Info

Publication number: CN214124038U
Application number: CN202023147180.6U
Authority: CN
Inventors: 鲁鹏; 鲁志佩; 彭青波
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-09-03
Anticipated expiration: 2030-12-23

Abstract

The application discloses battery module, adopt battery package of this battery module and adopt vehicle of this battery package. The battery module includes. The battery module includes a plurality of utmost point cores, module shell, electric core apron, a plurality of piece and the insulating lid of module of drawing forth. The module housing forms a receiving cavity with an opening for receiving the plurality of pole pieces. The battery core cover plate is connected with the opening side of the module shell in a sealing mode to seal the opening. The plurality of leading-out pieces are connected to the battery cell cover plate and are correspondingly and electrically connected with the plurality of pole cores. And the module insulating cover covers the battery core cover plate in an insulating way and is provided with an electrical interface electrically connected with the leading-out piece. This application can use an overall structure's apron to seal a plurality of utmost point cores in the module shell, accomplishes the sealed of a plurality of utmost point cores and draws forth with the electricity, has simplified the overall structure and the production process of battery module, has reduced the manufacturing cost of battery module.

Description

Battery module, battery package and vehicle

Technical Field

The utility model relates to a battery field, concretely relates to battery module, adopt the battery package of this battery module and have the vehicle of this battery package.

Background

In the popularization and spread of electric automobiles, the power battery pack is taken as a core component, and generally occupies a larger proportion of the cost of the whole automobile. Among the reasons that the cost of the power battery pack is high, the power battery pack is usually assembled by a plurality of single batteries into a battery module, and then the battery module is further assembled into a power supply assembly with the functions of heat management, electricity management and the like, i.e. the power battery pack, so that the structure is complex, the production process is multiple, the cost is high, and the improvement space is provided.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application discloses a battery module, a battery pack using the battery module, and a vehicle having the battery pack, which aims to simplify the overall structure and the production process of the battery module and reduce the manufacturing cost of the battery module.

The scheme is as follows:

a battery module, includes a plurality of utmost point cores, the battery module still includes:

a module housing forming an accommodation chamber having an opening for accommodating the plurality of pole cores;

the battery cell cover plate is hermetically connected with the opening side of the module shell so as to seal the opening;

the plurality of leading-out pieces are connected to the battery cell cover plate and are correspondingly and electrically connected with the plurality of pole cores; and

and the module insulating cover is used for insulating and coating the battery cell cover plate and is provided with an electrical interface electrically connected with the leading-out piece.

In some embodiments, the cell cover plate includes:

a cover main body for closing the opening; and

the pole posts are arranged on one side, away from the accommodating cavity, of the cover plate main body and correspond to the leading-out terminals of the pole cores one by one respectively;

the plurality of leading-out pieces are connected to one side, close to the containing cavity, of the cover plate main body, and lead-out terminals of the corresponding pole cores are electrically connected with the corresponding pole columns.

In some embodiments, the module case includes a bottom plate, a side plate, and an end plate, the side plate and the end plate being disposed around the bottom plate and together forming the receiving cavity, and the opening being formed at a side opposite to the bottom plate.

In some embodiments, the module housing includes a partition disposed within the accommodation cavity and dividing the accommodation cavity into a plurality of cell cavities having the openings;

the plurality of pole cores are correspondingly arranged in the plurality of cell cavities.

In some embodiments, the cell cover plate further includes a plurality of sealing protrusions corresponding to the openings of the cell cavities one to one, and the sealing protrusions are disposed on one side of the cover plate main body facing the accommodating cavity and used for sealing the openings of the corresponding cell cavities.

In some embodiments, the battery module further comprises a sealing ring; the sealing ring clamp is arranged at the sealing connection position of the battery core cover plate and the module shell.

In some embodiments, the die set housing is integrally formed by a casting process.

The application also provides a battery pack, which comprises at least one battery module, wherein the battery module is any one of the battery modules.

The application also provides a vehicle, including automobile body and aforementioned battery package.

In the battery module disclosed in the application, electric core apron with the opening side sealing connection of module shell is in order to seal the opening, electric core apron includes a plurality of pieces of drawing, a plurality of draw with a plurality of utmost point cores correspond the electricity and connect to can use an overall structure's apron to seal a plurality of utmost point cores in the module shell, accomplish the sealed of a plurality of utmost point cores and draw with the electricity, correspond respectively to set up an apron and form battery cell than each electric core in the correlation technique, assemble into the scheme of battery module by battery cell again, simplified the overall structure and the production process of battery module, reduced the manufacturing cost of battery module.

Drawings

The above-mentioned and other objects and advantages of the present invention will be described in detail below with reference to the accompanying drawings:

fig. 1 is an exploded view of a battery module in a preferred embodiment.

Fig. 2 is a schematic structural view of a module insulating cover, an inner lead-out piece, and a sealing ring in the battery module shown in fig. 1.

Fig. 3 is a partially enlarged view of a portion a of fig. 2.

Reference numerals:

10 module housing

20 pole core

30 inner lead-out piece

40 electric core cover plate

50 module insulating cover

60 sealing ring

70 positive pole leading-out mounting base of module

80 module negative pole leading-out mounting base

100 battery module

110 side plate

120 end plate

130 baffle

140 accommodating cavity

410 electric core cover plate main body

420 pole post

430 sealing projection

510 insulating cover body

520 module leading-out interface

530 Low-voltage connector

1201 die set lead-out mounting part

4101 sealing groove

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

As shown in fig. 1 and 2, the battery module 100 includes a module case 10, a plurality of pole cores 20, a plurality of inner lead pieces 30, a cell cover plate 40, and a module insulating cover 50. In a specific implementation, the inner lead piece 30 may be provided with other types of lead pieces as needed to electrically lead the pole core 20, and the lead pieces are used as the inner lead pieces 30 in the following description.

The module case 10 forms a receiving cavity 140 having an opening for receiving the plurality of pole pieces 20. For example, in an implementation, the module housing 10 forms a receiving cavity 140 therein for receiving the pole piece 20 and the electrolyte, and the pole piece 20 and the electrolyte form an electrochemical cell of the battery. In other embodiments, the pole core 20 and the electrolyte may be formed into a single cell, and then a plurality of cells may be accommodated in the accommodating cavity 140. The pole core 20 is a bare cell and constitutes an electrochemical unit of the battery module 100 together with the electrolyte.

The receiving chamber 140 has an opening (not shown) on one side, and in an implementation, the pole piece 20 can be inserted into the receiving chamber 140 of the module housing 10 through the opening, and the electrolyte can be injected into the receiving chamber 140 from the open side. When the pole core 20 and the electrolyte are first formed into a single cell, they may also be inserted into the receiving cavity 140 through the opening. The side of the receiving cavity 140 provided with the opening is generally directed upward during the manufacturing process or in the use state.

The cell cover plate 40 is hermetically connected to the opening side of the module housing 10, so as to close the opening.

The inner lead pieces 30 are connected to the cell cover plate 40, and the inner lead pieces 30 are electrically connected to the pole pieces 20 correspondingly, so that the pole pieces 20 are electrically led out. Specifically, each pole piece 20 typically includes a positive tab and a negative tab for drawing current. Accordingly, the side of the battery cover 40 facing away from the receiving cavity 140 is generally provided with an external lead-out member for leading out the supply current of the battery module 100 to an external electrical device. The inner lead-out pieces 30 are correspondingly connected between the positive tab or the negative tab of the pole core 20 and the outer lead-out piece on the battery cover plate 40, so that the current is led out from inside to outside. It is understood that the charging process is vice versa and will not be described herein.

The module insulating cover 50 is made of an insulating material, and covers the cell cover plate 40 in an insulating manner. The module insulating cover 50 is provided with an electrical interface electrically connected to the inner lead 30. For example, the electrical interface may be a module lead-out interface 520, the electrical connection between the module lead-out interface 520 and the inner lead-out sheet 30 is usually not directly connected, and the inner lead-out sheet 30 is correspondingly connected to the outer lead-out member on the battery cover plate 40, and a plurality of outer lead-out members are connected through the power line bank and then collectively connected to the module lead-out interface 520 for power output, which may be implemented with reference to a typical power battery structure. The module insulation cover 50 plays a role in electrical insulation and protection, and also plays a role in water resistance, dust resistance and the like.

The module insulating cover 50 may be provided with a module lead-out interface 520 for leading out power of the battery module 100, and may also be provided with a low-voltage connector 530 for connecting a low-voltage wire harness to collect parameters such as voltage and temperature of each battery cell in the battery module 100.

The end plate 120 is provided with a module lead-out mounting part 1201, and correspondingly, the battery module 100 further includes a module lead-out mounting base. The module lead-out mounting base can be mounted at the module lead-out mounting portion 1201. The module lead-out interface 520 on the module insulating cover 50 may be connected to the module lead-out mount for electrical lead-out of the battery module 100. Specifically, the module lead-out mounting base includes a module positive lead-out mounting base 70 and a module negative lead-out mounting base 80, which correspond to the positive and negative leads of the battery module 100, respectively.

In the battery module 100, the cell cover plate 40 with the opening side sealing connection of module shell 10 is in order to seal the opening, the cell cover plate 40 includes a plurality of extraction pieces, a plurality of extraction pieces with a plurality of utmost point cores 20 correspond the electricity and are connected, and electric core cover plate 40 can form an overall structure promptly, seals a plurality of utmost point cores 20 in module shell 10, accomplishes the sealed of a plurality of utmost point cores 20 and draws with the electricity, corresponds respectively to set up a apron and forms battery cell than each electric core in the correlation technique, assembles the scheme of battery module by battery cell again, has simplified battery module's overall structure and production processes, has reduced the manufacturing cost of battery module.

In some embodiments, the cell cover plate 40 may include a cover plate body 410 and a plurality of poles 420. The cover body 410 is used to close the opening. The plurality of poles 420 include a plurality of positive poles and a plurality of negative poles, which are respectively in one-to-one correspondence with the lead-out terminals of the plurality of pole pieces 20, that is, each positive pole corresponds to a positive pole tab of one pole piece 20, the positive pole tab is electrically connected to the corresponding positive pole tab through the corresponding internal lead-out piece 30, and the negative pole tabs are also connected to the corresponding negative pole tabs in the same manner. The posts 420 are disposed on a side of the cover plate body 410 away from the accommodating cavity 140 for providing external circuits.

The plurality of inner lead tabs 30 may be connected to a side of the cover plate body 410 adjacent to the receiving cavity 140 and electrically connect the lead terminals of the corresponding pole core with the corresponding pole 420. In a specific implementation, the inner lead 30 may be separately assembled to the side of the cap body 410.

In some embodiments, the module housing 10 may include a bottom plate (not shown), a side plate 110 and an end plate 120, wherein the side plate 110 and the end plate 120 surround the bottom plate and together form the receiving cavity 140, and the opening is formed at a side opposite to the bottom plate.

In some embodiments, the module case 10 is provided in a substantially regular shape, and the module case 10 is provided in a rectangular parallelepiped shape as an example to be described in detail below. In this case, the module case 10 may include a bottom plate, two oppositely disposed side plates 110, and two oppositely disposed end plates 120. The two side plates 110 and the two end plates 120 are disposed around the bottom plate to form the accommodating chamber 140, and the opening is formed on the side opposite to the bottom plate.

In specific implementation, the module housing 10 further includes a plurality of partition boards 130, and the partition boards 130 are disposed in the accommodating cavity 140 and partition the accommodating cavity 140 into a plurality of cell cavities with the openings. It should be noted that, in the multiple cell cavities, a single opening corresponding to each cell cavity is formed by separating the openings of the module housing by the partition 130, so that the names of the two openings are not distinguished.

Correspondingly, the battery module 100 may include a plurality of pole cores 20, which are correspondingly disposed in the plurality of cell cavities. It is understood that a predetermined amount of electrolyte is injected into each cell cavity correspondingly. Then, the single batteries corresponding to the battery cell cavities are produced according to the production process of the single batteries, so as to form the battery module 100 including a plurality of single batteries. The partition 130 and the corresponding positions of the bottom plate, the side plate 110 and the end plate 120 form a housing of each unit cell. Therefore, the pole core 20 and the electrolyte can be directly encapsulated in the module shell 10, and compared with the mode of producing single batteries separately and then assembling the single batteries into a battery module, the scheme of the application omits a shell body which is arranged separately for the single batteries, and the pole core 20 and the electrolyte directly correspond to the production of the battery module 100, so that the structure of the battery module 100 is simplified, and the volume energy density and the production efficiency of the battery module 100 are improved.

In some embodiments, the spacer 130 may be disposed parallel to the end plate 120. Accordingly, the large surface of the cell cavity formed by the partition 130 is also parallel to the end plate 120, the large surfaces of the pole cores 20, i.e., two planes with larger surface areas, which are generally perpendicular to the thickness direction and arranged in parallel, are parallel to the end plate 120, and each pole core 20 is arranged in the corresponding cell cavity in a direction parallel to the end plate 120.

In this situation, since the end plate 120 needs to play a main supporting and retaining role for the pole core 20, the outer side of the end plate 120 may be further provided with a reinforcing rib, thereby increasing the supporting strength.

In some embodiments, the module housing 10 may be integrally formed by a casting process. Specifically, the bottom plate, the two opposite side plates 110, the two opposite end plates 120, and the partition 130 of the module housing 10 may be integrally cast. Meanwhile, the aforementioned opening is formed at the side opposite to the bottom plate. It should be noted that, here, the module housing 10 is exemplified as a rectangular parallelepiped housing, and other forms of the module housing 10 and corresponding structures may be integrally cast and formed in corresponding structural forms.

The cell cover plate 40 may be welded and sealed to the module housing 10. It is understood that the cover plate 40 may be sealed to the module housing 10 by other forms of connection sealing, such as gluing, etc.

In some embodiments, the cell cover plate 40 further includes a plurality of sealing protrusions 430 corresponding to the openings of the plurality of cell cavities, and the sealing protrusions 430 are disposed on one side of the cover plate body 410 facing the accommodating cavity 140 and are used for closing the openings of the corresponding cell cavities. The sealing protrusion 430 may be integrally formed with the cap plate body 410.

In some embodiments, the battery module 100 further includes a sealing ring 60. The sealing ring 60 is clamped at the sealing connection between the cell cover plate 40 and the module housing 10. A sealing groove 4101 matched with the sealing ring 60 is arranged on one side of the cell cover plate 40 close to the module housing 10. In a specific embodiment, the sealing groove 4101 is disposed on the circumferential side of the cover plate body 410. When the cell cover plate 40 is assembled with the module housing 10, the cell cover plate 40 is sealed with the module housing 10 by compressing the seal ring 60. In a specific implementation, when the cell cover plate 40 includes a plurality of sealing protrusions 430, the sealing ring 60 may also be correspondingly disposed in a grid shape corresponding to edges of the plurality of sealing protrusions, so as to respectively seal each cell cavity.

Taking the battery module 100 as an example, the bottom plate, the side plates 110, the end plates 120, and the separators 130 may be integrally formed into the module case 10 by a die casting process during machining. Each internal lead-out piece 30 is assembled to the cell cover plate 40 and welded to the corresponding pole 420, the pole ear of the pole core 20 is welded to the corresponding internal lead-out piece 30, the whole structure of the assembled pole core 20 and the cell cover plate 40 is placed into each cell cavity of the module housing 10, and the cell cover plate 40 and the module housing 10 are sealed by laser welding. And then, producing the battery in the module according to the production flow of the single battery, wherein the production process comprises the procedures of helium detection, baking, liquid injection, formation, sealing, capacity grading and the like, and can be realized by referring to the typical production flow of the single battery.

The present application also provides a battery pack (not shown in the drawings) including at least one battery module 100, wherein the battery module is any one of the battery modules 100 defined in the foregoing embodiments. It is understood that the Battery pack may further include one or more of BMS (Battery Management System), sampling assembly, liquid cooling assembly, etc. to form a functional unit with a power output function, which is used as a power component of an electric vehicle or a hybrid vehicle.

The application also provides a vehicle (not shown in the figure), which comprises a vehicle body and the battery pack. The vehicle is an electric vehicle or a hybrid vehicle.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a battery module, includes a plurality of utmost point cores, its characterized in that, battery module still includes:

2. The battery module of claim 1, wherein the cell cover plate comprises:

a cover main body for closing the opening; and

3. The battery module according to claim 2, wherein: the module shell includes bottom plate and curb plate and end plate, curb plate and end plate enclose to be established bottom plate week side and common formation hold the chamber, and with the one side that the bottom plate is relative forms the opening.

4. The battery module according to claim 3, wherein: the module shell comprises a partition board which is arranged in the accommodating cavity and divides the accommodating cavity into a plurality of battery cell cavities with openings;

5. The battery module according to claim 4, wherein: the battery core cover plate further comprises a plurality of sealing bulges which are in one-to-one correspondence with the openings of the battery core cavities, and the sealing bulges are arranged on one side, facing the containing cavity, of the cover plate main body and are used for sealing the openings corresponding to the battery core cavities.

6. The battery module according to any one of claims 1 to 5, wherein: the battery module further comprises a sealing ring; the sealing ring clamp is arranged at the sealing connection position of the battery core cover plate and the module shell.

7. The battery module according to any one of claims 1 to 5, wherein: the module shell is integrally formed through a casting process.

8. The utility model provides a battery package, includes at least one battery module, its characterized in that: the battery module according to any one of claims 1 to 7.

9. The utility model provides a vehicle, includes automobile body and battery package, its characterized in that: the battery pack is the battery pack according to claim 8.