CN218887459U

CN218887459U - Battery module and vehicle

Info

Publication number: CN218887459U
Application number: CN202223238519.2U
Authority: CN
Inventors: 刘学文
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-04-18
Anticipated expiration: 2032-12-02

Abstract

The utility model provides a battery module and vehicle belongs to power battery technical field, include: a housing; the battery cell assembly comprises a plurality of battery cell modules which are sequentially connected in series, each battery cell module comprises two battery cell monomers which are arranged in parallel, and one row of battery cell assemblies is provided with two rows of battery cell monomers; the heating structure is arranged in the shell and corresponds to each row of the battery cell assemblies, and the heating structure is positioned between the two rows of the battery cell monomers and is attached to the battery cell monomers; and the immersion liquid is filled in the shell to immerse the electric core assembly and the heating structure. According to the battery module provided by the utility model, the heating structure can directly heat the battery cell monomer, the heating area is large, the heat loss is small, and the heating speed is improved; and, set up immersion liquid in the inside of shell, prevent that heating structure and local not laminating part of electric core monomer from taking place dry combustion method, guarantee heating structure's safe handling, improve heating structure's life.

Description

Battery module and vehicle

Technical Field

The utility model relates to a power battery technical field, concretely relates to battery module and vehicle.

Background

When the battery core works under the low-temperature cold start working condition, the temperature inside the battery core is relatively low, so that the internal resistance is large, the power supply capacity of the battery core is weak, and therefore the requirement on the low-temperature quick heating function of the battery pack of the electric automobile is higher and higher. Among the prior art, set up the hot plate at the outside laminating of battery module aluminum hull usually, heat battery module through the hot plate, consequently, lead to heat conduction path length, rate of heating is slow.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the slow defect of battery module rate of heating among the prior art to a battery module and vehicle are provided.

In order to solve the above problem, the utility model provides a battery module, include: a housing; the battery cell assembly comprises a shell, at least one row of battery cell assemblies and a plurality of battery cell modules, wherein the battery cell assemblies are arranged in the shell, each row of battery cell assemblies comprises a plurality of battery cell modules which are sequentially connected in series, each battery cell module comprises two battery cell monomers which are arranged in parallel, and each row of battery cell assembly comprises two rows of battery cell monomers; the heating structure is arranged in the shell and corresponds to each row of the battery cell assemblies, and is positioned between the two rows of the battery cell monomers and is attached to the battery cell monomers; and the immersion liquid is filled in the shell to immerse the electric core assembly and the heating structure.

Optionally, the electricity core subassembly is provided with even number row, heating structure is provided with one or a plurality of, every heating structure corresponds two adjacent rows electricity core subassembly sets up, every heating structure includes two rows of heating film, two rows two end connection settings that the heating film is located one side, every row the heating film is located one row electricity core subassembly two rows between the electricity core monomer.

Optionally, each row of heating film includes a heating portion and a connecting portion, the heating portion is provided with a plurality of, the connecting portion is connected to the adjacent heating portion, and the heating portion is attached to the side surface of the cell monomer.

Optionally, the connecting portions are disposed near edges of the two adjacent heating portions, an avoidance gap is formed between the two adjacent heating portions and the connecting portion, the two battery cell monomers connected in parallel are connected by a parallel connecting piece, and the avoidance gap allows the parallel connecting piece to pass through.

Optionally, two rows of the heating films of each heating structure are integrally formed; alternatively, two ends of the two rows of heating films of each heating structure on one side are connected by welding.

Optionally, two ends of the other side of the two rows of heating films are respectively connected with a film output electrode assembly, the film output electrode assembly is located on the housing, and the film output electrode assembly is suitable for being connected with a power supply.

Optionally, the membrane output electrode assembly comprises an electrode post and an aluminum row connecting piece, the end part of the heating membrane is electrically connected with the electrode post, and the electrode post is electrically connected with the aluminum row connecting piece.

Optionally, the cell assembly is provided with a module output electrode assembly, and the module output electrode assembly and the membrane output electrode assembly are arranged on the same side of the shell.

Optionally, the immersion liquid is a silicone oil or a fluorinated liquid.

The utility model also provides a vehicle, including foretell battery module.

The utility model has the advantages of it is following:

1. the utility model provides a battery module, set up the heating structure in the inside of shell to make the heating structure and electric core monomer laminate mutually, the heating structure can heat and heating area is big to the electric core monomer directly, and calorific loss is little, has improved the rate of heating; and, set up the immersion fluid in the inside of shell, prevent that heating structure and local not laminating part of electric core monomer from taking place dry combustion method, guarantee heating structure's safe handling, improve heating structure's life to, can improve the heating homogeneity.

2. The utility model provides a pair of battery module sets up the heating film that heating structure set up to two rows of connections and set up, makes heating structure corresponding with the electric core subassembly that is even number row setting, and the cooperation setting of the electric core subassembly is arranged with the even number to the heating structure of being convenient for to, the circular telegram of the heating structure of being convenient for.

3. The utility model provides a pair of battery module dodges the breach through forming between adjacent heating portion and connecting portion to dodge parallel connection spare, avoid parallel connection spare and heat the membrane and take place to interfere.

4. The utility model provides a pair of battery module utilizes utmost point post and aluminium row connecting piece to switch on the heating film, and the internal resistance is little, and the heating circuit loss is low, and the ability reinforce overflows, connects the high and connected mode simple of reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of a heating structure provided by an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of a two-row electrical core assembly provided by an embodiment of the present invention;

FIG. 3 is a schematic top view of the structure of FIG. 2;

fig. 4 is a schematic diagram illustrating the cooperation of two rows of electric core assemblies and a heating structure provided by the embodiment of the present invention;

fig. 5 is a schematic view of a part of a structure of a cell unit and a heating film in cooperation (a viewing angle of the heating film) provided by an embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a part of the battery cell unit provided by an embodiment of the present invention, which is matched with the heating film (a side view angle of the battery cell unit);

fig. 7 is a schematic diagram illustrating an external structure of a battery module according to an embodiment of the present invention;

fig. 8 shows a schematic diagram of a four-row electric core assembly and two heating structures provided by an embodiment of the present invention.

Description of reference numerals:

10. a housing; 20. a battery cell assembly; 21. a cell module; 211. a battery cell monomer; 212. a parallel connection member; 30. a heating structure; 31. heating the film; 311. a heating section; 312. a connecting portion; 313. avoiding the notch; 40. a membrane output electrode assembly; 50. a modular output pole assembly.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

One embodiment of the battery module shown in fig. 1 to 8 includes: a housing 10, and at least one row of electric core assemblies 20, a heating structure 30, and an immersion liquid disposed within the housing 10. Wherein, every row of electric core assembly 20 includes the electric core module 21 that a plurality of series connection set gradually, and every electric core module 21 includes two electric core monomers 211 of parallelly connected setting, consequently, one row of electric core assembly 20 has two rows of electric core monomers 211. The heating structure 30 is disposed corresponding to each row of the battery cell assemblies 20, and the heating structure 30 is located between two rows of the battery cell monomers 211 and attached to the battery cell monomers 211. The immersion liquid is filled in the interior of the outer shell 10, and the immersion liquid immerses the electric core assembly 20 and the heating structure 30.

It should be noted that, in this embodiment, the battery cell 211 is a flexible package battery cell, and the battery module is a blade module.

The heating structure 30 is attached to the large surface of the cell unit 211.

In this embodiment, the immersion liquid is silicone oil or a fluorinated liquid.

The heating structure 30 is arranged inside the casing 10, and the heating structure 30 is attached to the battery cell monomer 211, so that the heating structure 30 can directly heat the battery cell monomer 211, the heating area is large, the heat loss is small, and the heating speed is improved; moreover, the immersion liquid is arranged in the shell 10, so that the part, which is not locally attached to the electric core monomer 211, of the heating structure 30 is prevented from being dried, the safe use of the heating structure 30 is ensured, the service life of the heating structure 30 is prolonged, and the heating uniformity can be improved.

In the present embodiment, as shown in fig. 3 to fig. 6, two cell units 211 in one cell module 21 are connected by a parallel connection member 212, and the parallel connection member 212 is welded to the tabs of the cell units 211.

In the present embodiment, as shown in fig. 1 to 4, the battery module includes two rows of the cell assemblies 20, and thus, the battery module includes four rows of the single cells 211. The heating structure 30 is provided with one, and the heating structure 30 includes two rows of heating films 31, and each row of heating films 31 is located between two rows of cell units 211 of one row of the cell assembly 20. Specifically, referring to fig. 4, a row of heating films 31 is disposed between the first row of battery cells 211 and the second row of battery cells 211, and a row of heating films 31 is also disposed between the third row of battery cells 211 and the fourth row of battery cells 211.

It should be noted that the electric core assemblies 20 can be arranged in other even number of rows, and only the heating structure 30 is required to be arranged corresponding to each two rows of electric core assemblies 20. When the number of the cell assemblies 20 is 2n, correspondingly, the cell units 211 have 4n rows, the number of the heating structures 30 is n, and the number of the heating films 31 is 2 n. For example, referring to fig. 8, if 4 rows of the core assemblies 20 are provided, 8 rows of the cell monomers 211 are provided, 2 heating structures 30 are provided, and each heating film 31 has 4 rows, specifically, the first row of the heating film 31 is located between the first row and the second row of the cell monomers 211, the second row of the heating film 31 is located between the third row and the fourth row of the cell monomers 211, the third row of the heating film 31 is located between the fifth row and the sixth row of the cell monomers 211, and the fourth row of the heating film 31 is located between the seventh row and the eighth row of the cell monomers 211.

It should be noted that a row of heating films 31 can be understood as a layer of heating film 31, and the definition of the heating film 31 using "row" in this embodiment is to correspond to the core assemblies 20 and the cell units 211 arranged in a row.

As shown in fig. 1 and 4, two rows of heating films 31 are connected at both ends on one side. Specifically, referring to fig. 4, the two rows of heating films 31 are connected to each other on the left side.

The heating structure 30 is provided with two rows of heating films 31 which are connected, so that the heating structure 30 corresponds to the electric core assemblies 20 which are arranged in even rows, the heating structure 30 and the electric core assemblies 20 in even rows are matched, and the heating structure 30 is electrified conveniently.

In the present embodiment, the two rows of heating films 31 of the heating structure 30 are integrally formed. Of course, the two rows of heating films 31 may be separately provided, and the two corresponding ends of the two heating films 31 may be connected by using a U-shaped structure, such as welding.

As shown in fig. 7, two ends of the other side of the two rows of heating films 31 are respectively connected with a film output electrode assembly 40, the film output electrode assembly 40 is located on the housing 10, and the film output electrode assembly 40 is suitable for being connected with a power supply. Specifically, referring to fig. 4 and 7, the right sides of the two rows of heating films 31 are connected to the film output electrode assemblies 40.

In this embodiment, the film output electrode assembly 40 includes an electrode and an aluminum row connector, the end of the heating film 31 is electrically connected to the electrode, and the electrode is electrically connected to the aluminum row connector.

The heating film 31 is electrified by utilizing the pole and the aluminum bar connecting piece, so that the internal resistance is small, the loss of a heating loop is low, the overcurrent capacity is strong, the connection reliability is high, and the connection mode is simple.

As shown in fig. 7, the cell assembly 20 is connected to a modular output electrode assembly 50, and the modular output electrode assembly 50 and the membrane output electrode assembly 40 are disposed on the same side of the housing 10. Thus, the film output pole assembly 40 and the modular output pole assembly 50 are conveniently connected in a mating relationship with a power source.

It is noted that the positive and negative electrodes of the membrane output electrode assembly 40 can be processed in the same process as the positive and negative electrodes of the modular output electrode assembly 50. Also, both the film output pole assembly 40 and the module output pole assembly 50 are insulated from the case 10.

In this embodiment, as shown in FIG. 7, the film output pole assembly 40 is located below the modular output pole assembly 50.

As shown in fig. 3 and 5, each row of heating films 31 includes a plurality of heating portions 311 and a plurality of connecting portions 312, the connecting portions 312 connect adjacent heating portions 311, and the heating portions 311 are attached to the large surfaces of the cell units 211.

It should be noted that, the heating film 31 is attached to the large surface of the battery cell 211, so as to increase the heating area, and therefore, the heating film 31 may use a larger power, thereby increasing the heating speed. Moreover, heat transfer can be performed by using the immersion liquid, so that the heating uniformity can be ensured, the electric core monomer 211 can be uniformly heated, and the temperature difference of different parts of the electric core monomer 211 is reduced.

It should be noted that, referring to fig. 5, the number of the heating portions 311 is the same as the number of the cell units 211 in the row of the cell units 211, and the heating portions are disposed in a one-to-one correspondence.

It should be noted that the area of each heating portion 311 is smaller than or equal to the pole piece area of the battery cell 211.

As shown in fig. 1, 5, and 6, the connection parts 312 are disposed near edges of two adjacent heating parts 311, an avoidance gap 313 is formed between the two adjacent heating parts 311 and the connection parts 312, and the avoidance gap 313 allows the parallel connection member 212 to pass through, so as to prevent the parallel connection member 212 and the heating film 31 from interfering with each other.

In this embodiment, as shown in fig. 1, 5, and 6, the connection portion 312 has a strip-shaped structure, the connection portion 312 is disposed near the lower side edge of two adjacent battery cells 211, and two ends of the connection portion 312 are respectively connected to the two battery cells 211.

It should be noted that the housing 10 may be an aluminum housing, and the housing 10 is a sealing arrangement to prevent the immersion liquid from leaking. In addition, by arranging the immersion liquid, a good environment is formed inside the housing 10, so that the aging of the heating film 31 is delayed, and the service life is prolonged.

The embodiment also provides a specific implementation mode of a vehicle, which comprises the battery module. When the vehicle used under low temperature environment, this battery module can realize quick and safe heating, satisfied user demand.

According to the above description, the present patent application has the following advantages:

1. the heating structure can directly heat the single battery cell, the heating area is large, the heat loss is small, and the heating speed is improved;

2. the heating film is attached to the large surface of the single battery cell, so that the heating area is increased, and the heating film can adopt higher power, thereby increasing the heating speed;

3. the immersion liquid is arranged to prevent the heating structure and the local part of the battery cell monomer which is not jointed from being dried;

4. the heat transfer can be carried out by using the immersion liquid, so that the heating uniformity can be ensured;

5. the heating film is electrified by utilizing the pole and the aluminum bar connecting piece, so that the internal resistance is small, the loss of a heating loop is low, the overcurrent capacity is strong, the connection reliability is high, and the connection mode is simple.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A battery module, comprising:

a housing (10);

at least one row of electric core assembly (20) arranged in the shell (10), wherein each row of electric core assembly (20) comprises a plurality of electric core modules (21) which are sequentially connected in series, each electric core module (21) comprises two electric core monomers (211) which are arranged in parallel, and one row of electric core assembly (20) is provided with two rows of electric core monomers (211);

the heating structure (30) is arranged in the shell (10) and corresponds to each row of the battery core assembly (20), and the heating structure (30) is positioned between the two rows of the battery core monomers (211) and is attached to the battery core monomers (211);

an immersion liquid filled in the interior of the housing (10) to immerse the electric core assembly (20) and the heating structure (30).

2. The battery module according to claim 1, wherein the cell assembly (20) is provided with an even number of rows, the heating structure (30) is provided with one or a plurality of heating structures, each heating structure (30) is provided corresponding to two adjacent rows of the cell assembly (20), each heating structure (30) comprises two rows of heating films (31), two end portions of the two rows of heating films (31) on one side are connected, and each row of heating films (31) is positioned between two rows of the cell units (211) of one row of the cell assembly (20).

3. The battery module according to claim 2, wherein each row of the heating films (31) comprises a plurality of heating portions (311) and a plurality of connecting portions (312), the connecting portions (312) connect adjacent heating portions (311), and the heating portions (311) are attached to the side surfaces of the single battery cells (211).

4. The battery module according to claim 3, wherein the connecting portions (312) are arranged near edges of two adjacent heating portions (311), an avoidance gap (313) is formed between the two adjacent heating portions (311) and the connecting portions (312), two cell units (211) arranged in parallel are connected through a parallel connection piece (212), and the avoidance gap (313) allows the parallel connection piece (212) to pass through.

5. The battery module according to any one of claims 2 to 4, wherein the two rows of heating films (31) of each heating structure (30) are integrally formed; alternatively, two ends of the two rows of heating films (31) of each heating structure (30) on one side are connected by welding.

6. The battery module according to any one of claims 2 to 4, wherein two ends of the other side of the two rows of the heating films (31) are respectively connected with a film output pole assembly (40), the film output pole assemblies (40) are positioned on the shell (10), and the film output pole assemblies (40) are suitable for being connected with a power supply.

7. The battery module according to claim 6, wherein the film output electrode assembly (40) comprises an electrode post and an aluminum row connecting piece, wherein the end of the heating film (31) is electrically connected with the electrode post, and the electrode post is electrically connected with the aluminum row connecting piece.

8. The battery module according to claim 6, wherein the cell assembly (20) is provided with a module output pole assembly (50) in a connected manner, and the module output pole assembly (50) and the film output pole assembly (40) are provided on the same side on the housing (10).

9. The battery module according to any one of claims 1 to 4, wherein the immersion liquid is silicone oil or a fluorinated liquid.

10. A vehicle characterized by comprising the battery module according to any one of claims 1 to 9.