CN218887457U - Battery module and power device - Google Patents

Abstract

The utility model provides a battery module and power device belongs to power battery technical field, and wherein, the battery module includes: the battery core assembly comprises four trapezoidal battery cores; the four trapezoidal battery cells are respectively a first battery cell, a second battery cell, a third battery cell and a fourth battery cell, the side surface of the first battery cell is spliced with the side surface of the third battery cell, the side surface of the second battery cell is spliced with the side surface of the fourth battery cell, the first battery cell and the fourth battery cell have the same orientation and are arranged in a stacked manner, the third battery cell and the second battery cell have the same orientation and are arranged in a stacked manner, and the orientation of the first battery cell is opposite to that of the third battery cell; first electric core and second electric core are established ties through first busbar, and second electric core and third electric core are established ties through the second busbar, and the utmost point post of third electric core and the utmost point post of fourth electric core correspond the laminating and establish ties. The utility model provides a pair of battery module, the mode of arranging of trapezoidal electric core in the battery module is reasonable, and is convenient for establish ties between the trapezoidal electric core, and the space utilization of battery module is high.

Description

Battery module and power device

Technical Field

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

Background

Trapezoidal electric core has can avoid utmost point ear to bend and the characteristics that current-carrying capacity is strong. However, because the structural feature of trapezoidal electric core self, when the battery module of constituteing a plurality of trapezoidal electric core, the arrangement of a plurality of trapezoidal electric core of being not convenient for to also be convenient for the series connection of a plurality of trapezoidal electric core, the space utilization of battery module is low.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art with the battery module of the trapezoidal electric core of a plurality of constitution, be not convenient for arranging of the trapezoidal electric core of a plurality of to also be not convenient for the series connection's of the trapezoidal electric core of a plurality of defect, thereby provide a battery module and power device.

In order to solve the above problem, the utility model provides a battery module, include: the battery comprises a battery core assembly and a battery cover, wherein the battery core assembly comprises four trapezoidal battery cells, each trapezoidal battery cell comprises two polar columns, the two polar columns are arranged on the bottom surface of the trapezoidal battery cell and respectively correspond to the parts of the bottom surface, which extend out of the top surface of the trapezoidal battery cell; at least one electric core component is arranged; the four trapezoidal battery cells are respectively a first battery cell, a second battery cell, a third battery cell and a fourth battery cell, the side surface of the first battery cell in the width direction is spliced with the side surface of the third battery cell in the width direction, the side surface of the second battery cell in the width direction is spliced with the side surface of the fourth battery cell in the width direction, the first battery cell and the fourth battery cell have the same orientation and are arranged in a stacked manner, the third battery cell and the second battery cell have the same orientation and are arranged in a stacked manner, and the orientations of the first battery cell and the third battery cell are opposite; the first battery cell and the second battery cell are connected in series through a first bus bar, the second battery cell and the third battery cell are connected in series through a second bus bar, and a pole of the third battery cell and a pole of the fourth battery cell are correspondingly attached and connected in series.

Optionally, the first busbar includes first conduction part, second conduction part and first connecting portion, first conduction part with the utmost point post of first electric core is connected, second conduction part with the utmost point post of second electric core is connected, first connecting portion connect first conduction part with second conduction part, first connecting portion follow first electric core with between the third electric core, third electric core with between the fourth electric core and set up between the fourth electric core and the second electric core.

Optionally, the first connection portion includes a first attachment section, a transition section, and a second attachment section, which are sequentially connected, where the first attachment section is located between the first battery cell and the third battery cell, the transition section is located between the third battery cell and the fourth battery cell, and the second attachment section is located between the fourth battery cell and the second battery cell; first laminating section with first conduction part is connected, first conduction part with switching section branch is located the both sides and the dislocation set of first laminating section, second laminating section with second conduction part is connected, second conduction part with switching section branch is located the both sides and the dislocation set of second laminating section.

Optionally, the second busbar includes a third conduction portion, a fourth conduction portion and a second connection portion, the third conduction portion is connected with the pole of the third battery cell, the fourth conduction portion is connected with the pole of the second battery cell, and the second connection portion is connected with the third conduction portion and the fourth conduction portion.

Optionally, the third conduction part and the fourth conduction part are arranged at an interval, and two ends of the second connection part are respectively connected with two sides of the third conduction part and the fourth conduction part on different sides.

Optionally, the battery module includes a plurality of electricity core subassembly, a plurality of electricity core subassembly is followed the width direction of trapezoidal electric core arranges the setting in proper order, a plurality of electricity core subassembly passes through the third busbar and establishes ties the setting.

Optionally, the third bus bar is in a strip plate structure.

Optionally, the two electrode posts of each trapezoidal battery cell are respectively arranged at opposite angles of the bottom surface.

Optionally, the battery module further includes a plurality of cold plates, and the plurality of cold plates are located between the first battery cell and the fourth battery cell and between the second battery cell and the third battery cell.

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

The utility model has the advantages of it is following:

1. the utility model provides a pair of battery module, according to the structural feature of trapezoidal electric core, with four trapezoidal electric core range upon range of settings, and, because the setting position of utmost point post on trapezoidal electric core, after trapezoidal electric core stacks, can make third electric core and fourth electric core through the direct laminating of utmost point post and establish ties, and, use first busbar to establish ties first electric core and second electric core, use second busbar to establish ties second electric core and third electric core, realized the series connection setting of four trapezoidal electric cores; consequently, the mode of arranging of trapezoidal electric core in the battery module is reasonable, and the series connection between the trapezoidal electric core of being convenient for, and the space utilization of battery module is high.

2. The utility model provides a pair of battery module sets up first connecting portion along between four trapezoidal electric cores, has improved the utilization ratio in battery module space.

3. The utility model provides a pair of battery module, with first conduction portion and switching section branch locate the both sides and the dislocation set of first laminating section, locate the both sides and the dislocation set of second laminating section with second conduction portion and switching section branch to can dodge the utmost point post position of third electricity core and fourth electricity core laminating through the switching section.

4. The utility model provides a pair of battery module, because third electricity core and fourth electricity core establish ties through the laminating of utmost point post, make between first electricity core and the fourth electricity core, form certain clearance between second electricity core and the third electricity core to utilize this clearance to hold the cold drawing, the cold drawing sets up the position rationally, has further improved the space utilization of battery module.

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 prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of an electrical core assembly provided by an embodiment of the present invention;

fig. 2 shows a first partial structural schematic diagram of an electric core assembly provided by an embodiment of the present invention;

fig. 3 shows a second partial structural schematic diagram of the electric core assembly provided by the embodiment of the present invention;

fig. 4 is a schematic diagram illustrating an overall structure of a first bus bar provided in an embodiment of the present invention;

FIG. 5 is a front view of FIG. 4;

fig. 6 shows a schematic perspective view of a trapezoidal electrical core provided in an embodiment of the present invention;

FIG. 7 is a bottom view of FIG. 6;

FIG. 8 is a front view of FIG. 6;

fig. 9 is a schematic structural diagram illustrating a first angle of a battery module according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram illustrating a second angle of the battery module according to the embodiment of the present invention;

fig. 11 is a schematic front view of fig. 9.

Description of reference numerals:

100. a battery cell assembly; 110. a trapezoidal battery cell; 111. a pole column; 112. a bottom surface; 113. a top surface; 114. a side surface; 10. a first cell; 20. a second cell; 30. a third cell; 40. a fourth cell; 50. a first bus bar; 51. a first conduction part; 52. a second conduction part; 53. a first connection portion; 531. a first laminating section; 532. a switching section; 533. a second attaching section; 60. a second bus bar; 61. a third conduction part; 62. a fourth conduction part; 63. a second connecting portion; 70. a third bus bar; 80. a cold plate.

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 is to 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 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 11 includes: at least one electrical core assembly 100. One electrical core assembly 100 includes four trapezoidal electrical cores 110, as shown in fig. 6 to 8, each trapezoidal electrical core 110 includes two terminal posts 111, and the two terminal posts 111 are disposed on the bottom surface 112 of the trapezoidal electrical core 110 and respectively correspond to the partial arrangement of the bottom surface 112 extending out of the top surface 113 of the trapezoidal electrical core 110. As shown in fig. 1 to fig. 3, the four trapezoidal battery cells 110 are a first battery cell 10, a second battery cell 20, a third battery cell 30, and a fourth battery cell 40, a side 114 of the first battery cell 10 along the width direction is spliced with a side 114 of the third battery cell 30 along the width direction, a side 114 of the second battery cell 20 along the width direction is spliced with a side 114 of the fourth battery cell 40 along the width direction, the first battery cell 10 and the fourth battery cell 40 have the same orientation and are stacked, the third battery cell 30 and the second battery cell 20 have the same orientation and are stacked, and the orientations of the first battery cell 10 and the third battery cell 30 are opposite. The first battery cell 10 and the second battery cell 20 are connected in series through the first busbar 50, the second battery cell 20 and the third battery cell 30 are connected in series through the second busbar 60, and the pole 111 of the third battery cell 30 and the pole 111 of the fourth battery cell 40 are correspondingly attached and connected in series.

It should be noted that, referring to fig. 1, the right end of the third battery cell 30 is stacked on the left end of the fourth battery cell 40, so that the third battery cell 30 and the fourth battery cell 40 are directly attached to each other through the terminal 111 for series connection.

Please refer to fig. 8, a bottom surface 112 of the trapezoidal battery cell 110 is a lower surface of the trapezoidal battery cell 110 in fig. 8, a top surface 113 of the trapezoidal battery cell 110 is an upper surface of the trapezoidal battery cell 110 in fig. 8, and side surfaces 114 of the trapezoidal battery cell 110 are two left and right inclined surfaces of the trapezoidal battery cell 110 in fig. 8. Therefore, the width direction is a direction perpendicular to the drawing plane in fig. 8.

According to the structural characteristics of the trapezoidal battery cells 110, the four trapezoidal battery cells 110 are stacked, and due to the arrangement positions of the terminal posts 111 on the trapezoidal battery cells 110, after the trapezoidal battery cells 110 are stacked, the third battery cell 30 and the fourth battery cell 40 can be directly attached through the terminal posts 111 to be connected in series, the first battery cell 10 and the second battery cell 20 are connected in series through the first busbar 50, and the second battery cell 20 and the third battery cell 30 are connected in series through the second busbar 60, so that the series arrangement of the four trapezoidal battery cells 110 is realized; consequently, trapezoidal electric core 110's the mode of arranging is reasonable in the battery module, and the series connection between the trapezoidal electric core 110 of being convenient for, and the space utilization of battery module is high.

In the present embodiment, terminal post 111 of third cell 30 and terminal post 111 of fourth cell 40 are connected by welding.

In this embodiment, as shown in fig. 6 and fig. 7, two poles 111 of each trapezoidal battery cell 110 are separately disposed at opposite corners of the bottom surface 112, so as to facilitate the butt joint between the poles 111 and the arrangement of the bus bars.

As shown in fig. 1 to fig. 5, the first bus bar 50 includes a first conduction portion 51, a second conduction portion 52, and a first connection portion 53, where the first conduction portion 51 is connected to the terminal 111 of the first battery cell 10, the second conduction portion 52 is connected to the terminal 111 of the second battery cell 20, the first connection portion 53 connects the first conduction portion 51 and the second conduction portion 52, and the first connection portion 53 is disposed along the first battery cell 10 and the third battery cell 30, the third battery cell 30 and the fourth battery cell 40, and the fourth battery cell 40 and the second battery cell 20. Therefore, the first connecting portion 53 is arranged along the four trapezoidal battery cells 110, so that the utilization rate of the battery module space is improved.

As shown in fig. 1 to fig. 5, the first connection portion 53 includes a first attachment section 531, an adapter section 532, and a second attachment section 533, which are connected in sequence, where the first attachment section 531 is located between the first battery cell 10 and the third battery cell 30, the adapter section 532 is located between the third battery cell 30 and the fourth battery cell 40, and the second attachment section 533 is located between the fourth battery cell 40 and the second battery cell 20. The first attaching section 531 is connected with the first conduction part 51, and the first conduction part 51 and the switching section 532 are respectively arranged on two sides of the first attaching section 531 and are arranged in a staggered manner; the second attaching section 533 is connected to the second conduction part 52, and the second conduction part 52 and the adapting section 532 are disposed on two sides of the second attaching section 533 and are staggered. Therefore, the position of the pole 111 where the third battery cell 30 and the fourth battery cell 40 are attached to each other can be avoided by the transition section 532.

It should be noted that, referring to fig. 5, the first conducting portion 51 is located at the upper left side of the first attaching section 531, and the adapting section 532 is located at the lower right side of the first attaching section 531; the adapting section 532 is located at the upper right side of the second attaching section 533, and the second conduction part 52 is located at the lower left side of the second attaching section 533.

As shown in fig. 1 to 3, the second bus bar 60 includes a third conduction portion 61, a fourth conduction portion 62, and a second connection portion 63, the third conduction portion 61 is connected to the pole 111 of the third battery cell 30, the fourth conduction portion 62 is connected to the pole 111 of the second battery cell 20, and the second connection portion 63 connects the third conduction portion 61 and the fourth conduction portion 62. Specifically, as shown in fig. 1, the third conduction portion 61 and the fourth conduction portion 62 are disposed at an interval, and two ends of the second connection portion 63 are respectively connected to two opposite sides of the third conduction portion 61 and the fourth conduction portion 62, that is, referring to fig. 1, the second bus bar 60 is in a Z shape.

As shown in fig. 9 to 11, the battery module includes a plurality of electric core assemblies 100, the plurality of electric core assemblies 100 are sequentially arranged along the width direction of the trapezoidal electric core 110, and the plurality of electric core assemblies 100 are serially connected through the third bus bar 70. In the present embodiment, as shown in fig. 9, the third bus bar 70 is a long strip-shaped plate structure, and the third bus bar 70 is disposed along the arrangement direction (width direction) of the plurality of electric core assemblies 100.

As shown in fig. 9 to 11, the battery module further includes a plurality of cold plates 80, where the plurality of cold plates 80 are disposed between the first cell 10 and the fourth cell 40, and between the second cell 20 and the third cell 30. Because third electricity core 30 and fourth electricity core 40 establish ties through utmost point post 111's laminating, make between first electricity core 10 and the fourth electricity core 40, form certain clearance between second electricity core 20 and the third electricity core 30 to utilize this clearance to hold cold drawing 80, cold drawing 80 sets up the position rationally, has further improved the space utilization of battery module.

In the present embodiment, as shown in fig. 9 to 11, two cold plates 80 are provided, one of which is located between the first cell 10 and the fourth cell 40, and the other is located between the second cell 20 and the third cell 30. And, each cold plate 80 is provided with an inlet and an outlet for circulating a cooling medium, which may be cooling water.

It should be noted that the height of the electrode posts 111 of the trapezoidal battery cell 110 is usually about 3mm, and therefore, the height of the two electrode posts 111 after corresponding attachment and connection is about 6mm, and the thickness of one cold plate 80 is usually not greater than 6mm, and therefore, the height of the gap between the first battery cell 10 and the fourth battery cell 40 and the height of the gap between the second battery cell 20 and the third battery cell 30 can meet the requirement of placing the cold plate 80.

It should be further explained that, the cold plate 80 is attached to the top surfaces 113 and the bottom surfaces 112 of the four trapezoidal battery cells 110, so that the cooling effect on the trapezoidal battery cells 110 can be ensured, and therefore, the large-rate charging and discharging design of the battery module can be realized while the current-carrying capacity and the safety performance of the trapezoidal battery cells 110 are ensured.

The embodiment also provides a specific implementation mode of the power device, which comprises the battery module. The power plant may be a vehicle.

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

1. the trapezoidal battery cells in the battery module are reasonably arranged, the trapezoidal battery cells are conveniently connected in series, and the space utilization rate of the battery module is high;

2. the cold plate is accommodated by utilizing the gaps between the first battery cell and the fourth battery cell and between the second battery cell and the third battery cell, the arrangement position of the cold plate is reasonable, and the space utilization rate of the battery module is further improved;

3. the current-carrying capacity and the safety performance of the trapezoidal battery cell are guaranteed, and meanwhile, the high-rate charge-discharge design of the battery module can be realized, so that the application feasibility and the application range of the battery module are improved and expanded.

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 (10)

1. A battery module, comprising:

the battery core assembly (100) comprises four trapezoidal battery cells (110), each trapezoidal battery cell (110) comprises two pole columns (111), and the two pole columns (111) are arranged on the bottom surface (112) of the trapezoidal battery cell (110) and respectively correspond to the part of the bottom surface (112) extending out of the top surface (113) of the trapezoidal battery cell (110); the electric core assembly (100) is provided with at least one;

the four trapezoidal battery cells (110) are respectively a first battery cell (10), a second battery cell (20), a third battery cell (30) and a fourth battery cell (40), the side surface (114) of the first battery cell (10) in the width direction is spliced with the side surface (114) of the third battery cell (30) in the width direction, the side surface (114) of the second battery cell (20) in the width direction is spliced with the side surface (114) of the fourth battery cell (40) in the width direction, the first battery cell (10) and the fourth battery cell (40) have the same orientation and are arranged in a stacked mode, the third battery cell (30) and the second battery cell (20) have the same orientation and are arranged in a stacked mode, and the orientations of the first battery cell (10) and the third battery cell (30) are opposite; the first battery cell (10) and the second battery cell (20) are connected in series through a first busbar (50), the second battery cell (20) and the third battery cell (30) are connected in series through a second busbar (60), and a pole column (111) of the third battery cell (30) and a pole column (111) of the fourth battery cell (40) are correspondingly attached and connected in series.

2. The battery module according to claim 1, wherein the first busbar (50) comprises a first conduction portion (51), a second conduction portion (52) and a first connection portion (53), the first conduction portion (51) is connected with the pole (111) of the first battery cell (10), the second conduction portion (52) is connected with the pole (111) of the second battery cell (20), the first connection portion (53) is connected with the first conduction portion (51) and the second conduction portion (52), and the first connection portion (53) is arranged along the first battery cell (10) and the third battery cell (30), the third battery cell (30) and the fourth battery cell (40), and the fourth battery cell (40) and the second battery cell (20).

3. The battery module according to claim 2, wherein the first connecting portion (53) comprises a first attaching section (531), an adapting section (532) and a second attaching section (533) which are sequentially connected, the first attaching section (531) is located between the first electric core (10) and the third electric core (30), the adapting section (532) is located between the third electric core (30) and the fourth electric core (40), and the second attaching section (533) is located between the fourth electric core (40) and the second electric core (20); first laminating section (531) with first conduction portion (51) is connected, first conduction portion (51) with switching section (532) branch is located the both sides and the dislocation set of first laminating section (531), second laminating section (533) with second conduction portion (52) are connected, second conduction portion (52) with switching section (532) branch is located the both sides and the dislocation set of second laminating section (533).

4. The battery module according to any one of claims 1 to 3, wherein the second busbar (60) comprises a third conduction part (61), a fourth conduction part (62) and a second connection part (63), the third conduction part (61) is connected with a pole (111) of the third battery cell (30), the fourth conduction part (62) is connected with the pole (111) of the second battery cell (20), and the second connection part (63) is connected with the third conduction part (61) and the fourth conduction part (62).

5. The battery module according to claim 4, wherein the third conduction part (61) and the fourth conduction part (62) are disposed at an interval, and both ends of the second connection part (63) are connected to both sides of the third conduction part (61) and the fourth conduction part (62) on opposite sides, respectively.

6. The battery module according to any one of claims 1 to 3, wherein the battery module comprises a plurality of the electric core assemblies (100), the plurality of the electric core assemblies (100) are sequentially arranged along the width direction of the trapezoidal electric core (110), and the plurality of the electric core assemblies (100) are serially connected through a third bus bar (70).

7. The battery module according to claim 6, wherein the third bus bar (70) has an elongated plate structure.

8. The battery module according to any one of claims 1-3, wherein the two poles (111) of each trapezoidal cell (110) are arranged at opposite corners of the bottom surface (112).

9. The battery module according to any of claims 1 to 3, characterized in that the battery module further comprises a plurality of cold plates (80), wherein the plurality of cold plates (80) are provided, and wherein the plurality of cold plates (80) are located between the first cell (10) and the fourth cell (40) and between the second cell (20) and the third cell (30).

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

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