CN112582755A

CN112582755A - Battery module

Info

Publication number: CN112582755A
Application number: CN201910945292.9A
Authority: CN
Inventors: 郑楚豪; 郑卫鑫; 曾而平; 曾毅; 王小龙
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-03-30

Abstract

The invention discloses a battery module, which comprises a plurality of battery cores and connecting pieces, wherein the battery cores are sequentially arranged along a first direction, two sides of each battery core in a second direction are respectively provided with a positive pole column and a negative pole column, the second direction is vertical to the first direction, the connecting pieces are a plurality of connecting pieces and are respectively positioned on two sides of each battery core in the second direction, each connecting piece is connected with the pole columns on the same side of two adjacent battery cores, and an included angle alpha between the central connecting line of the two pole columns connected by the connecting pieces and the first direction is nonzero. The battery module has good safety and applicability.

Description

Battery module

Technical Field

The invention relates to the technical field of batteries, in particular to a battery module.

Background

Electric core in the battery module can link to each other through the connection piece, however, among the correlation technique, battery module design is unreasonable, for the creepage distance of guaranteeing between the electric core for the thickness of electric core is great, battery module volume is great, and if reduce the thickness of electric core, creepage distance between the electric core will unable the satisfaction requirement, thereby makes the applicable occasion of battery module limited.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a battery module which has good safety and applicability.

The battery module according to the present invention includes: the battery comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are sequentially arranged along a first direction, two sides of each battery cell in a second direction are respectively provided with a positive pole column and a negative pole column, and the second direction is perpendicular to the first direction; the connecting pieces are multiple and are respectively positioned on at least one side of the battery cell in the second direction, each connecting piece is connected with two adjacent pole columns on the same side of the battery cell, and the included angle alpha between the central connecting line of the two pole columns connected by the connecting pieces and the first direction is nonzero.

According to the battery module, the included angle between the central connecting line of the two polar posts connected by the connecting sheet and the arrangement direction of the plurality of battery cells is non-zero, so that the creepage distance between the battery cells is effectively increased, the safety of the battery module is improved, the design flexibility of the battery cells is ensured, the thickness of the battery cells can be reduced, and the applicability of the battery module is improved.

In some embodiments, the polarities of the poles on the same side of two adjacent battery cells are opposite, and the connecting sheet connects the adjacent positive pole and the adjacent negative pole, so that the battery cells are connected in series.

In some embodiments, the positive electrode posts on the same side of the battery module are arranged side by side, and the negative electrode posts on the same side of the battery module are arranged side by side.

In some embodiments, each connecting piece has the same shape and size, and the connecting pieces on the same side of the battery module are arranged side by side.

In some embodiments, the α further satisfies: alpha is more than or equal to 10 degrees and less than or equal to 80 degrees.

In some embodiments, the α is 45 °

In some embodiments, the positive electrode post and the negative electrode post connected by the connecting tab are spaced apart by h along the first direction, the h being greater than 0 mm.

In some embodiments, the distance between the two poles connected by the connecting sheet on the central connecting line of the two poles is greater than or equal to 7.8 mm.

In some embodiments, the thickness d of the cell in the first direction is less than or equal to 20 mm.

In some embodiments, each of the cells is formed in a rectangular parallelepiped structure.

In some embodiments, the battery module further includes: the circuit board is suitable for being connected between the battery core and the battery management system.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is an exploded view of a battery module according to one embodiment of the present invention;

fig. 2 is a schematic view of the battery module shown in fig. 1;

fig. 3 is a schematic view of another angle of the battery module shown in fig. 1

FIG. 4 is a schematic diagram of the connection of the circuit board shown in FIG. 1 to a battery management system;

fig. 5 is a schematic view of a battery module according to another embodiment of the present invention;

fig. 6 is a partial structural view of the battery module shown in fig. 5.

Reference numerals:

a battery module 100, a first connection line 100a, a battery management system 101,

A battery cell 1, a pole 10, a positive pole 11, a negative pole 12,

A connecting sheet 2, a bracket 20,

Circuit board 3, connector 30, main part 31, collection portion 32.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

The battery module 100 according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1 to 3 and 5, a battery module 100 according to an embodiment of the present invention includes a plurality of battery cells 1, where the battery cells 1 are arranged in sequence along a first direction (e.g., a left-right direction in fig. 1 to 3), and each of the battery cells 1 has a positive electrode post 11 and a negative electrode post 12 on two sides in a second direction (e.g., a front-back direction in fig. 1), that is, the positive electrode post 11 and the negative electrode post 12 of each of the battery cells 1 may be oppositely disposed along the second direction, and the second direction is perpendicular to the first direction. In the description of the present invention, the term "plurality" means two or more.

As shown in fig. 1 to fig. 3 and fig. 5, the battery module 100 may further include a plurality of connecting pieces 2, where the plurality of connecting pieces 2 are respectively located on at least one side of the battery cell 1 in the second direction, that is, the plurality of connecting pieces 2 may be located on one side of the battery cell 1 in the second direction, or the plurality of connecting pieces 2 may be respectively located on both sides of the battery cell 1 in the second direction; each connecting piece 2 is connected with the poles 10 (for example, the positive pole 11 and the negative pole 12) on the same side of the two adjacent battery cells 1.

For example, when the plurality of connection pieces 2 are located on one side of the battery cells 1 in the second direction, the other sides of two adjacent battery cells 1 in the second direction may be electrically connected by a connection line or other manners, but is not limited thereto; if the preset parameters of the battery core 1, such as voltage and/or temperature signals, need to be collected, the connecting sheet 2 and the collecting device can be connected to one side of the battery core 1 in the second direction for collection, and the pole 10 and the collecting device can be connected to the other side of the battery core 1 in the second direction for collection, so that the number of collecting points can be reduced, the number of collecting points can be smaller than the number of the pole 10, and the arrangement of the battery module 100 is simplified. When the plurality of connecting pieces 2 are respectively located at two sides of the battery cell 1 in the second direction, the plurality of connecting pieces 2 may include a first connecting piece 2 and a second connecting piece 2, the first connecting piece 2 and the second connecting piece 2 may be respectively located at two sides of the battery cell 1 in the second direction, the first connecting piece 2 may connect the terminal 10 of one side of the two adjacent battery cells 1 in the second direction, and the second connecting piece 2 may connect the terminal 10 of the other side of the two adjacent battery cells 1 in the second direction, so as to realize electrical connection between the two adjacent battery cells 1, thereby realizing electrical connection between the plurality of battery cells 1; if the preset parameters of the battery core 1, such as voltage and/or temperature signals, need to be acquired, the connecting pieces 2 and the acquisition devices can be respectively connected to two sides of the battery core 1 in the second direction for acquisition, so that the number of acquisition points can be further reduced, and the arrangement of the battery module 100 is facilitated to be simplified; the first connecting piece 2 may be one or more, and the second connecting piece 2 may be one or more. Of course, the manner of acquiring the predetermined parameters of the battery cell 1 is not limited to this.

Wherein, the included angle α between the central connecting line of the two poles 10 connected by the connecting sheet 2 and the first direction is non-zero, that is, the included angle α between the central connecting line of the two poles 10 connected by the connecting sheet 2 and the arrangement direction of the plurality of battery cells 1 is not equal to 0 °, so that the two poles 10 connected by the connecting sheet 2 can be staggered in the direction perpendicular to the first direction, and the air gap between the two poles 10 connected by the connecting sheet 2 can be increased, thereby the creepage distance between the two poles 10 connected by the connecting sheet 2 can be increased, so that the creepage distance between the battery cells 1 (creepage distance refers to the creepage distance between two conductive parts measured along the insulating surface, under different use conditions, because the insulating material around the conductor is polarized, the charged area of the insulating material presenting the charged phenomenon) can meet the design requirements such as national standard requirements, even if the external dimension of the battery cells 1 is small, the above-mentioned mode of setting up of this application also can effectively increase the creepage distance between electric core 1 to promote battery module 100's security, make battery module 100's electric core 1 have certain design flexibility, avoid electric core 1's setting to receive certain restriction, be favorable to promoting battery module 100's practicality and suitability.

It is understood that "the included angle between the central connecting line of the two poles 10 connected by the connecting sheet 2 and the first direction is nonzero" may also be understood that, on a plane perpendicular to the second direction, the connecting line between the orthographic projections of the centers of the two poles 10 connected by the connecting sheet 2 is a first connecting line 100a, and the included angle between the first connecting line 100a and the first direction is nonzero, that is, the included angle β between the first connecting line 100a and the first direction is not equal to 0 °.

Therefore, according to the battery module 100 provided by the embodiment of the invention, the included angle between the central connecting line of the two polar columns 10 connected by the connecting sheet 2 and the arrangement direction of the plurality of battery cells 1 is nonzero, so that the two polar columns 10 connected by the connecting sheet 2 can be arranged in a staggered manner, the creepage distance between the battery cells 1 is effectively increased, the safety of the battery module 100 is improved, meanwhile, the design flexibility of the battery cells 1 is ensured, the thickness of the battery cells 1 can be reduced, the occupied space of the battery module 100 is saved, the miniaturized design of the battery module 100 can be realized, and the applicability of the battery module 100 is favorably improved.

In addition, every electric core 1's anodal utmost point post 11 and negative pole post 12 are located electric core 1 both sides on the second direction respectively for electric core 1's anodal utmost point post 11 and negative pole post 12 set up along the second direction relatively, for among the conventional art, electric core 1's utmost point post 10 is located the ascending homonymy of second direction and arranges, battery module 100 in this application can save the installation component for example electric core 1's mounting panel etc. is convenient for simplify battery module 100's structure, be favorable to promoting battery module 100's energy density simultaneously.

In some embodiments of the present invention, as shown in fig. 2 and fig. 3, the polarities of the poles 10 on the same sides of two adjacent battery cells 1 are opposite, so that the poles 10 on the same sides of two adjacent battery cells 1 are not the same as the positive pole 11 and the negative pole 12, and the poles 10 on the same sides of two adjacent battery cells 1 are the positive pole 11 and the negative pole 12, respectively, that is, one of the poles 10 on the same side of two adjacent battery cells 1 in the second direction is the positive pole 11, and the other is the negative pole 12, in other words, the positive pole 11 of one of the two adjacent battery cells 1 is adjacent to one side of the other negative pole 12 in the second direction, and the negative pole 12 of the above-mentioned one of the two adjacent battery cells 1 is adjacent to the other side of the other positive pole 11 in the second direction. The connecting sheet 2 connects the adjacent positive pole post 11 and the negative pole post 12 to make a plurality of electric cores 1 establish ties, then on the first direction, first connecting sheet 2 and second connecting sheet 2 set up crisscross, for example first connecting sheet 2 and second connecting sheet 2 are a plurality of, on the first direction, can be equipped with a second connecting sheet 2 between two adjacent first connecting sheets 2, and can be equipped with a first connecting sheet 2 between two adjacent second connecting sheets 2. From this, connected mode is simple between a plurality of electric cores 1, has made things convenient for arranging of a plurality of connection pieces 2, has promoted the connection efficiency of a plurality of electric cores 1.

It should be noted that, in the first direction, one second connection piece 2 may be disposed between two adjacent first connection pieces 2, and one first connection piece 2 may be disposed between two adjacent second connection pieces 2, it is to be understood that, in the first direction, the center of the second connection piece 2 between two adjacent first connection pieces 2 may be located between the centers of the two adjacent first connection pieces 2, and the center of the first connection piece 2 between two adjacent second connection pieces 2 may be located between the centers of the two adjacent second connection pieces 2.

It can be understood that, the polarity of the terminal 10 at the same side of two adjacent battery cells 1 can also be the same, and then the terminal 10 at the same side of two adjacent battery cells 1 can be the positive terminal 11 and the negative terminal 12, and when the connecting sheet 2 connects the terminals at the same side of two adjacent battery cells 1, then the two adjacent battery cells 1 can be arranged in parallel. From this, the connected mode of a plurality of electric cores 1 has certain flexibility, is convenient for realize battery module 100's diversified design.

Optionally, as shown in fig. 1-3, a plurality of positive poles 11 on the same side of the battery module 100 are arranged side by side, then a plurality of positive poles 11 on the same side of the battery module 100 can be arranged on a line, a plurality of negative poles 12 on the same side of the battery module 100 are arranged side by side, then a plurality of negative poles 12 on the same side of the battery module 100 can be arranged on a line, thereby simplifying the arrangement mode of the positive poles 11 and the negative poles 12, facilitating the realization of the regular layout of the battery module 100, and being beneficial to saving the occupied space of the battery module 100.

For example, in the example of fig. 1 to 3, the positive electrode posts 11 on the same side of the battery module 100 in the second direction may be arranged side by side in a direction perpendicular to the first direction and the second direction (e.g., the up-down direction in fig. 1 to 3), the negative electrode posts 12 on the same side of the battery module 100 in the second direction may be arranged side by side in a direction perpendicular to the first direction and the second direction (e.g., the up-down direction in fig. 1 to 3), and then the post arrangements of the plurality of battery cells 1 may be the same, so that the battery cells 1 have good versatility, and mass production of the battery cells 1 is facilitated.

Of course, the plurality of positive electrode posts 11 on the same side of the battery module 100 may also be arranged non-side by side; the plurality of negative electrode posts 12 on the same side of the battery module 100 may not be arranged in parallel. From this, the arrangement of the positive electrode post 11 and the negative electrode post 12 of the battery module 100 has good diversity, which is convenient for realizing the diversified design of the battery module 100.

Alternatively, as shown in fig. 1 and 5, each connecting piece 2 may be formed in a flat plate structure, and the shape and the size of each connecting piece 2 are the same, so that the connecting pieces 2 have good versatility, which facilitates mass production of the connecting pieces 2; and a plurality of connection pieces 2 of battery module 100 homonymy set up side by side, then a plurality of connection pieces 2 of battery module 100 homonymy can be arranged on a line, are convenient for simplify the arrangement of a plurality of connection pieces 2, further realize battery module 100's regular overall arrangement.

For example, in the example of fig. 1, a plurality of connection pieces 2 located at the same side of the battery cell 1 may be sequentially arranged along the first direction, two adjacent connection pieces 2 located at the same side of the battery cell 1 may be electrically insulated from each other, and a plurality of connection pieces 2 located at the same side of the battery cell 1 may be arranged side by side in the direction perpendicular to the first direction and the second direction, which facilitates the rapid assembly of the battery module 100 and is beneficial to improving the assembly efficiency.

It can be understood that the shapes and sizes of the connecting sheets 2 may not be completely the same, and it is only necessary to ensure that each connecting sheet 2 can connect the poles 10 on the same side of two adjacent electric cores 1; the arrangement of the plurality of connecting pieces 2 is not limited thereto.

Further, the structure of the coupling pieces 2 may be specifically set according to the actual application, for example, the shape of each coupling piece 2 may be formed in a polygonal shape or the like, but is not limited thereto.

In some embodiments of the present invention, as shown in fig. 1-3, α further satisfies: alpha is more than or equal to 10 degrees and less than or equal to 80 degrees, thereby avoiding the situation that the thickness of the battery core 1 is larger and the volume of the battery module 100 is larger under the same creepage distance requirement when the alpha is too small or too large, and further realizing the miniaturization design of the battery module 100. For example, α may be 30 °, or 45 °, or 50 °, etc., but is not limited thereto.

In some embodiments of the present invention, as shown in fig. 1 to fig. 3, the positive electrode post 11 and the negative electrode post 12 connected by the connecting sheet 2 are spaced apart by an interval h along the first direction, and h is greater than 0mm, so that the positive projections of the positive electrode post 11 and the negative electrode post 12 connected by the connecting sheet 2 in the first direction can be spaced apart from each other, which is further beneficial to increase the creepage distance between the two electrode posts 10 connected by the connecting sheet 2, and improve the safety of the battery module 100.

Of course, the positive electrode post 11 and the negative electrode post 12 connected by the connecting piece 2 may be provided with no space in the first direction, for example, there may be an overlapping portion between the orthographic projection of the positive electrode post 11 connected by the connecting piece 2 and the orthographic projection of the negative electrode post 12 in the first direction.

Further, as shown in fig. 2 and fig. 3, the distance between the two terminals 10 connected by the connecting sheet 2 on the central connecting line of the two terminals 10 is greater than or equal to 7.8mm, so as to further ensure that the creepage distance between the connected battery cores 1 meets the national standard requirement. For example, in the example of fig. 3, the distance between the two poles 10 connected by the connecting plate 2 on the connecting line of the centers of the two poles 10 is h ', h ' ≧ 7.8mm, h ' can be 7.8mm, 8.4mm, 9mm, or the like.

In some optional embodiments of the present invention, as shown in fig. 2, if the thickness d of the battery cell 1 in the first direction is less than or equal to 20mm, the external dimension of the battery cell 1 is small, and on the premise that the creepage distance between the battery cells 1 meets the requirement, the occupied space of the battery cell 1 is saved, so that the size of the battery module 100 is small; when the battery module 100 is applied to a vehicle or the like, the arrangement of the battery module 100 is facilitated. It is understood that the thicknesses d of the plurality of battery cells 1 in the first direction may be equal or different.

Of course, the thickness of the battery cell 1 in the first direction may also be set to other values according to practical applications, and is not limited thereto.

In some optional embodiments of the present invention, as shown in fig. 1, each battery cell 1 is formed into a rectangular parallelepiped structure, so that the battery cell 1 has a simple structure and is convenient to process; a plurality of electric cores 1 arrange along first direction in proper order, are convenient for make battery module 100 structure regular, for example battery module 100 also can form into the cuboid structure.

In a further embodiment of the present invention, as shown in fig. 1 and fig. 4, the battery module 100 further includes a circuit board 3, the circuit board 3 is suitable for being connected between the battery cells 1 and the battery management system 101, and the circuit board 3 is provided with a connector 30 suitable for being electrically connected to the battery management system 101, so that the battery management system 101 can obtain signals of voltages and/or temperatures of the plurality of battery cells 1 through the circuit board 3, so that the battery management system 101 can monitor the plurality of battery cells 1, for example, the battery management system 101 can monitor whether charging and discharging of the plurality of battery cells 1 are normal, ensure normal and reliable operation of the plurality of battery cells 1, and facilitate improvement of reliability of the battery module 100 in use. Therefore, the collection structure of the battery module 100 is simple and convenient to produce.

Alternatively, in the example of fig. 1 and 4, the circuit board 3 may be a flexible circuit board 3, the circuit board 3 may include a circuit substrate, the circuit substrate includes a body portion 31 and a plurality of collecting portions 32, the plurality of collecting portions 32 are disposed around the body portion 31 at intervals, one end of each collecting portion 32 is connected to an edge of the body portion 31, the other end of each collecting portion 32 may be connected to the electric core 1, the body portion 31 is provided with a connector 30, the connector 30 may be connected to the plurality of collecting portions 32 through the body portion 31, since the collecting part 32 is connected to the connecting piece 2, the collecting part 32 can be used to make the connector 30 obtain the voltage and/or temperature signal of the battery cell 1, and the connector 30 is adapted to be electrically connected with the battery management system 101, the connector 30 may transmit the voltage and/or temperature signals of the battery cells 1 acquired by the acquisition part 32 to the battery management system 101, so as to ensure that the battery management system 101 monitors a plurality of battery cells 1.

The other end of the collecting unit 31 may be connected to the battery cell 1 through the connecting sheet 2, but is not limited thereto. For example, in the example of fig. 1 and 5, the plurality of connection pieces 2 may be respectively located on at least one side of the battery cell 1 in the second direction, the circuit board 3 may be located on one side of the battery cell 1 in the second direction, at least one of the plurality of collection portions 31 may be connected to the terminal 10 located on the same side of the battery cell 1 as the circuit board 3 through the connection piece 2, and at least one of the plurality of collection portions 31 may be indirectly connected to the terminal 10 located on the opposite side of the battery cell 1 as the circuit board 3, at this time, a connection terminal may be provided on the battery module 100, and the connection terminal may be electrically connected to the terminal 10 located on the opposite side of the battery cell 1 as the circuit board 3, so as to simplify the connection of the collection portions 31, facilitate the arrangement and connection of the circuit board 3; but is not limited thereto.

It should be noted that "a plurality of collecting portions 32 are disposed around the body portion 31 at intervals" may include the following cases: the plurality of collecting portions 32 may be spaced apart around the body portion 31 for a full turn, or the plurality of collecting portions 32 may be spaced apart around the body portion 31 for less than a full turn, for example, the plurality of collecting portions 32 may be spaced apart around the body portion 31 for a half turn, but is not limited thereto.

Wherein, circuit substrate can be integrative die-cut to form, then body 31 and a plurality of collection portion 32 can form into integrative die-cut piece, for example body 31 and a plurality of collection portion 32 can adopt die-cut mould one-time die-cut shaping to the required appearance of direct processing becomes circuit substrate, has made things convenient for circuit substrate's processing, is convenient for reduce circuit substrate's manufacturing procedure, promotes machining efficiency. The circuit substrate may be connected between the battery management system 101 and the connecting sheet 2, and the battery management system 101 may obtain signals of voltages and/or temperatures of the plurality of battery cells 1 through the circuit substrate. For among the conventional art, adopt the nickel piece terminal to link to each other circuit board 3 and connection piece 2, circuit board 3 in this application sets up to the circuit substrate that forms including integrative die-cut, under the prerequisite of guaranteeing that circuit board 3 can gather signals such as electric core 1 voltage and/or temperature, need not additionally set up the nickel piece terminal, can save the SMT (surface mounting technology) process of carrying on the nickel piece terminal on circuit substrate, save the cohesion of strengthening nickel piece terminal and circuit substrate and cover the process of protection film on the nickel piece terminal, thereby circuit substrate's manufacturing procedure has been simplified, and then circuit board 3's manufacturing procedure is simplified, the machining efficiency of circuit board 3 has been promoted, circuit board 3's lead time has been accelerated, the cost of nickel piece terminal has been saved simultaneously, thereby circuit board 3's cost has effectively been reduced.

In addition, the circuit substrate in this application need not increase extra circuit material such as copper foil material in the course of working, can set up circuit substrate into required appearance shape before circuit substrate is die-cut to adopt the die-cut appearance mould that corresponds, just can obtain corresponding circuit substrate after die-cut completion, processing convenience, machining efficiency height. Of course, the main body portion 31 and the plurality of collecting portions 32 may also be separately molded.

Other constructions and operations of the battery module 100 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

The battery module 100 according to the embodiment of the present invention is described in detail in two specific embodiments with reference to fig. 1 to 6. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.

Example one

In this embodiment, as shown in fig. 1 to 4, the battery module 100 may be used in a vehicle, the battery module 100 is substantially formed into a rectangular parallelepiped structure, the battery module 100 includes 14 battery cells 1, and a circuit board 3, each battery cell 1 is formed into a rectangular parallelepiped structure, each battery cell 1 has two terminals 10, each terminal 10 may protrude from an end surface of the battery cell 1 in a second direction, the two terminals 10 are a positive terminal 11 and a negative terminal 12, respectively, and the positive terminal 11 and the negative terminal 12 of each battery cell 1 are located on two sides of the battery cell 1 in the second direction (for example, the front-back direction in fig. 1); the 14 battery cells 1 are sequentially arranged in a first direction (e.g., the left-right direction in fig. 1 to 3), so that the shape of the structure formed by the arrangement of the 14 battery cells 1 is substantially a rectangular parallelepiped. The thickness d of the battery cell 1 in the first direction is less than or equal to 20mm, the polarities of the poles 10 of the two adjacent battery cells 1 on the same side in the second direction are opposite, the 7 positive poles 11 of the battery cells 1 on the same side in the second direction are arranged side by side, the 7 negative poles 11 of the battery cells 1 on the same side in the second direction are arranged side by side, and the second direction is perpendicular to the first direction.

The number of the connecting pieces 2 can be 12, the 12 connecting pieces 2 have the same structure and the same size, the 12 connecting pieces 2 are respectively positioned on two sides of the battery cell 1 in the second direction, and the two sides of the battery cell 1 in the second direction are respectively provided with 6 connecting pieces 2; each connecting sheet 2 is connected with the pole 10 at the same side of two adjacent battery cores 1, so that a plurality of battery cores 1 are connected in series, and the connecting sheets 2 at the same side of the battery cores 1 in the second direction are arranged side by side; the included angle alpha between the central connecting line of the two poles (the anode pole 11 and the cathode pole 12) connected by the connecting sheet and the first direction is nonzero, alpha is more than or equal to 10 degrees and less than or equal to 80 degrees, the two poles 10 connected by the connecting sheet 2 are spaced by h along the first direction, and h is more than 0 mm. Wherein, the connecting piece 2 can be an aluminum piece.

It can be understood that, in the up-down direction, the arrangement positions of the positive electrode post 11 and the negative electrode post 12 connected by the connecting sheet 2 can be flexibly set, for example, in the positive electrode post 11 and the negative electrode post 12 connected by the connecting sheet 2, the positive electrode post 11 can be located on the upper side of the negative electrode post 12, or the positive electrode post 11 can be located on the lower side of the negative electrode post 12

One side of the battery module 100 in the second direction may be provided with a support 20, the support 20 may be formed with a plurality of accommodating portions, the accommodating portions may be formed as accommodating grooves, and the plurality of connecting pieces 2 may be respectively accommodated in the plurality of accommodating portions, so as to further improve the insulation between two adjacent connecting pieces 2; the circuit board 3 may be mounted to the bracket 20, and the circuit board 3 is adapted to be connected between the battery management system 101 and the plurality of battery cells 1 to facilitate mounting of the circuit board 3. Of course, the mounting manner of the circuit board 3 is not limited to this, for example, the battery module 100 may further include a housing 1, a plurality of battery cells 1 may be arranged in the housing 1, and the circuit board 3 may be mounted to the housing 1.

It should be noted that in the description of the present application, "vertical" may include absolute vertical and substantially vertical; for example, "the second direction is perpendicular to the first direction" may include the following cases: 1. the second direction is absolutely vertical to the first direction, and the included angle between the second direction and the first direction is 90 degrees; 2. or the second direction is not absolutely perpendicular to the first direction, the second direction is approximately perpendicular to the first direction, and the included angle between the second direction and the first direction is close to 90 degrees, for example, the included angle between the second direction and the first direction can be more than 80 degrees; but is not limited thereto.

The battery module 100 according to the embodiment of the invention has good safety, ensures the use safety of users, and has the advantages of simple structure, reasonable arrangement and convenient production.

Example two

As shown in fig. 5 and 6, the present embodiment has substantially the same structure as the first embodiment, wherein the same reference numerals are used for the same components, except that: the number of the battery cores 1 is 13, and the number of the connecting pieces 2 is 12.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the 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. A battery module, comprising:

the battery comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are sequentially arranged along a first direction, two sides of each battery cell in a second direction are respectively provided with a positive pole column and a negative pole column, and the second direction is perpendicular to the first direction;

the connecting pieces are multiple and are respectively positioned on at least one side of the battery cell in the second direction, each connecting piece is connected with two adjacent pole columns on the same side of the battery cell, and the included angle alpha between the central connecting line of the two pole columns connected by the connecting pieces and the first direction is nonzero.

2. The battery module according to claim 1, wherein the polarities of the poles on the same side of two adjacent battery cells are opposite, and the connecting sheet connects the adjacent positive pole and the adjacent negative pole so as to connect the battery cells in series.

3. The battery module according to claim 2, wherein the positive electrode posts on the same side of the battery module are arranged side by side, and the negative electrode posts on the same side of the battery module are arranged side by side.

4. The battery module according to claim 3, wherein each of the connecting tabs is identical in shape and size, and a plurality of the connecting tabs on the same side of the battery module are arranged side by side.

5. The battery module according to claim 1, wherein a further satisfies: alpha is more than or equal to 10 degrees and less than or equal to 80 degrees.

6. The battery module according to claim 5, wherein α is 45 °.

7. The battery module according to claim 1, wherein the positive electrode terminal and the negative electrode terminal connected by the connecting tab are spaced apart by h in the first direction, wherein h is greater than 0 mm.

8. The battery module according to claim 7, wherein the interval between the two poles connected by the connecting tab on the central connecting line of the two poles is equal to or greater than 7.8 mm.

9. The battery module according to claim 1, wherein the thickness d of the battery cell in the first direction is less than or equal to 20 mm.

10. The battery module according to claim 1, wherein each of the cells is formed in a rectangular parallelepiped structure.

11. The battery module according to claim 1, further comprising:

the circuit board is suitable for being connected between the battery core and the battery management system.