CN219067145U

CN219067145U - Battery module and power device

Info

Publication number: CN219067145U
Application number: CN202223525547.2U
Authority: CN
Inventors: 刘学文; 赵亮; 曲凡多
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-23
Anticipated expiration: 2032-12-28

Abstract

The utility model provides a battery module and a power device, which belong to the technical field of power batteries and comprise: the plurality of trapezoid electric cores are sequentially arranged along the thickness direction of the trapezoid electric cores, the top surfaces of the plurality of trapezoid electric cores face the same direction, and triangular spaces are formed between adjacent trapezoid electric cores; the base portion is arranged on one side of the trapezoid electric cores, the base portion and the trapezoid electric cores are correspondingly arranged along the side faces of the trapezoid electric cores in the length direction, fixing holes are formed in the base portion, the positions of the fixing holes correspond to the triangular space, fasteners are arranged in the fixing holes, and parts of the fasteners are located in the triangular space. According to the battery module provided by the utility model, the triangular space formed between the adjacent trapezoid battery cells is utilized to accommodate the fasteners, so that the triangular space is utilized, and the utilization rate of the battery module space is further improved.

Description

Battery module and power device

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery module and a power device.

Background

In the existing battery cell manufacturing process, the lug needs to be bent when the cover plate is welded, the lug cannot be observed when being bent, the lug bending state is poor in consistency, and product quality fluctuation is easy to cause. In order to avoid bending of the electrode lugs of the battery cell during the design of the battery cell, the current carrying capacity of the electrode column of the battery cell is greatly increased as much as possible, and then a trapezoid battery cell design scheme for separating the explosion-proof valve from the electrode column of the battery cell is provided. However, due to the structural characteristics of the trapezoid battery cell, when the current battery cell is formed by modules, the space of the battery module is wasted due to the triangular structures at the two ends of the battery cell, and the space utilization rate of the battery module is low.

Disclosure of Invention

Therefore, the utility model aims to overcome the defect of low space utilization rate of the battery module in the prior art, thereby providing the battery module and the power device.

In order to solve the above problems, the present utility model provides a battery module including: the plurality of trapezoid electric cores are sequentially arranged along the thickness direction of the trapezoid electric cores, the top surfaces of the plurality of trapezoid electric cores face the same direction, and triangular spaces are formed between adjacent trapezoid electric cores; the base portion is arranged on one side of the trapezoid electric cores, the base portion and the trapezoid electric cores are correspondingly arranged along the side faces of the trapezoid electric cores in the length direction, fixing holes are formed in the base portion, the positions of the fixing holes correspond to the triangular space, fasteners are arranged in the fixing holes, and parts of the fasteners are located in the triangular space.

Optionally, the plurality of trapezoid electric cores are serially connected through serial buses.

Optionally, the trapezoidal electric core includes two posts, two the post all set up in the bottom surface department of trapezoidal electric core, and be located the bottom surface extends the part department of top surface, concatenate the busbar and connect adjacent two of trapezoidal electric core the post, concatenate the busbar and extend the setting in two adjacent triangle-shaped space.

Optionally, the serial bus bar includes a first conducting portion, a second conducting portion and a connecting portion, the first conducting portion and the second conducting portion are arranged at opposite intervals, the first conducting portion is connected with a pole of one of the adjacent ladder-shaped electric cores, the second conducting portion is connected with a pole of another of the adjacent ladder-shaped electric cores, and two opposite sides of the connecting portion are respectively connected with two sides of the first conducting portion and the second conducting portion, which are located at different sides.

Optionally, the trapezoid battery core includes an explosion-proof valve, the explosion-proof valve is located on the side of the trapezoid battery core along the width direction, a through hole is formed in the connecting portion, and the explosion-proof valve and the through hole are correspondingly arranged.

Optionally, the shoe is a bottom plate or a cold plate.

Optionally, two ends of the trapezoid electric cores are respectively provided with an end plate, and the end plates are attached to the top surface or the bottom surface of the trapezoid electric core at the end part.

Optionally, the battery module further comprises a binding belt, and the binding belt binds the trapezoid electric cells and the end plates.

Optionally, the battery module further includes two output electrode buses, and the two output electrode buses are respectively connected with the poles of the trapezoid electric cores located at the two ends of the trapezoid electric cores.

The utility model also provides a power device comprising the battery module.

The utility model has the following advantages:

1. according to the battery module provided by the utility model, the triangular space formed between the adjacent trapezoid battery cells is utilized to accommodate the fasteners, so that the triangular space is utilized, and the utilization rate of the battery module space is further improved.

2. According to the battery module provided by the utility model, the serial bus bars are arranged corresponding to the triangular space, so that the utilization rate of the space of the battery module is further improved while a plurality of trapezoid battery cells are connected in series.

3. According to the battery module provided by the utility model, the explosion-proof valve is arranged on the side surface of the trapezoid battery core along the width direction, the through holes are formed in the connecting part corresponding to the explosion-proof valve, the position arrangement of the explosion-proof valve is reasonable, and the smoothness of exhaust is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing the overall structure of a battery module according to an embodiment of the present utility model;

FIG. 2 is a schematic top view of FIG. 1;

FIG. 3 is an enlarged view of FIG. 1 at A;

fig. 4 is a schematic structural diagram of adjacent ladder-shaped cells connected by a serial bus bar according to an embodiment of the present utility model.

Reference numerals illustrate:

10. a trapezoidal cell; 11. a pole; 12. an explosion-proof valve; 20. triangular space; 30. a bottom support part; 31. a fixing hole; 32. a fastener; 40. a serial bus; 41. a first conduction part; 42. a second conduction part; 43. a connection part; 431. a through hole; 50. an end plate; 60. a tie; 70. an output electrode bus.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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 utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

One embodiment of the battery module shown in fig. 1 to 4 includes: a plurality of trapezoidal cells 10 and a base 30. The trapezoid battery cores 10 are sequentially arranged along the thickness direction of the trapezoid battery cores 10, the top surfaces of the trapezoid battery cores 10 face the same direction, and triangular spaces 20 are formed between adjacent trapezoid battery cores 10. The bottom support portion 30 is disposed at one side of the plurality of trapezoid electric cores 10, and the bottom support portion 30 is disposed corresponding to a side of the plurality of trapezoid electric cores 10 along a length direction of the trapezoid electric cores 10. The bottom support part 30 is provided with a fixing hole 31, the fixing hole 31 is arranged at a position corresponding to the triangular space 20, a fastening piece 32 is arranged in the fixing hole 31, and part of the fastening piece 32 is positioned in the triangular space 20.

It should be noted that referring to fig. 4, triangular spaces 20 are formed between two left ends of two adjacent trapezoidal cells 10 and between two right ends of two adjacent trapezoidal cells 10.

The triangular space 20 formed between the adjacent trapezoid batteries 10 is utilized to accommodate the fastener 32, so that the triangular space 20 is utilized, and the utilization rate of the battery module space is improved.

It should be noted that the bottom support 30 may be a bottom plate or a cold plate, and may be specifically matched according to the thermal management requirements of the battery module. When the bottom support part 30 is a bottom plate, the bottom plate is bonded with the plurality of trapezoid electric cores 10 through structural adhesive; when the bottom support 30 is a cold plate, the cold plate is adhered to the plurality of trapezoidal cells 10 through the heat-conducting structural adhesive.

The fastening member 32 may be a bolt, and the fastening member 32 is used to fix the position of the battery module.

As shown in fig. 1 and 2, a plurality of ladder-shaped cells 10 are arranged in series by a series bus bar 40. Specifically, as shown in fig. 1 to 4, the ladder-shaped battery cell 10 includes two pole posts 11, the two pole posts 11 are disposed at the bottom surface of the ladder-shaped battery cell 10, and are located at the portion of the bottom surface extending out of the top surface, and the serial bus bar 40 is connected to the two pole posts 11 of the adjacent ladder-shaped battery cell 10, and the serial bus bar 40 is disposed in the adjacent two triangular spaces 20 in a extending manner.

The serial bus bars 40 are arranged corresponding to the triangular spaces 20, so that the utilization rate of the battery module space is further improved while a plurality of trapezoid battery cells 10 are connected in series.

In this embodiment, as shown in fig. 3 and 4, the serial bus bar 40 includes a first conductive portion 41, a second conductive portion 42 and a connection portion 43, where the first conductive portion 41 and the second conductive portion 42 are disposed at opposite intervals, the first conductive portion 41 is connected to the post 11 of one of the adjacent ladder-shaped cells 10, the second conductive portion 42 is connected to the post 11 of the other ladder-shaped cell 10 of the adjacent ladder-shaped cells 10, and opposite sides of the connection portion 43 are connected to two sides of the first conductive portion 41 and the second conductive portion 42 on opposite sides. That is, referring to fig. 4, the serial bus 40 has a zigzag shape.

It should be noted that, referring to fig. 3 and 4, the outer side surface of the first conducting portion 41 is used for connecting with the pole 11, and the inner side surface of the second conducting portion 42 is used for connecting with the pole 11.

The first conductive portion 41 and the pole 11, and the second conductive portion 42 and the pole 11 are all connected by welding.

As shown in fig. 1 and 3, the trapezoid battery cell 10 includes an explosion-proof valve 12, the explosion-proof valve 12 is located on a side surface of the trapezoid battery cell 10 along a width direction, a through hole 431 is formed in a connecting portion 43, the explosion-proof valve 12 is disposed corresponding to the through hole 431, the position arrangement of the explosion-proof valve 12 is reasonable, and the smoothness of exhaust is ensured.

Of course, the explosion-proof valve 12 may be located at other positions of the ladder-shaped cell 10, and the through hole 431 may not be provided in the connection portion 43.

It should be noted that, referring to fig. 4, the top surface of the trapezoid electric core 10 is the upper surface of the trapezoid electric core 10 in fig. 4, the bottom surface of the trapezoid electric core 10 is the lower surface of the trapezoid electric core 10 in fig. 4, the side surface of the trapezoid electric core 10 along the length direction is the side surface shown in the drawing of the trapezoid electric core 10 in fig. 4, and the side surfaces of the trapezoid electric core 10 along the width direction are the left side surface and the right side surface of the trapezoid electric core 10 in fig. 4.

As shown in fig. 1 and 2, two ends of each of the plurality of trapezoidal cells 10 are respectively provided with an end plate 50, and the end plates 50 are attached to the top surface or the bottom surface of the trapezoidal cell 10 at the end.

It should be noted that referring to fig. 2, an end plate 50 is disposed at the upper end of the plurality of trapezoidal cells 10, and the end plate 50 is attached to the top surface of the trapezoidal cell 10 at the uppermost end; the lower ends of the trapezoid battery cells 10 are provided with an end plate 50, and the end plate 50 is attached to the bottom surface of the trapezoid battery cell 10 at the lowest end.

As shown in fig. 1, the battery module further includes a tie 60, and the tie 60 ties up the plurality of trapezoidal cells 10 and the end plate 50 to tightly bind the plurality of trapezoidal cells 10 and the end plate 50.

It should be noted that, a slot is provided on the end plate 50 corresponding to the position of the ribbon 60 to prevent the ribbon 60 from sliding off.

As shown in fig. 1 and 2, the battery module further includes two output electrode buses 70, where the two output electrode buses 70 are respectively connected with the poles 11 of the trapezoid battery cells 10 located at two ends of the trapezoid battery cells 10, so as to realize output of a circuit.

It should be noted that, referring to fig. 1 and 2, when the number of the plurality of trapezoidal cells 10 is an odd number, two output electrode buses 70 are disposed on opposite sides. Correspondingly, when the number of the plurality of trapezoid battery cells 10 is even, the two output electrode buses 70 are arranged on the same side.

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 triangular space formed between the adjacent trapezoid cells is used for accommodating the fasteners, so that the triangular space is utilized, and the utilization rate of the space of the battery module is improved;

2. the serial bus bars are arranged corresponding to the triangular space, so that the utilization rate of the space of the battery module is further improved while a plurality of trapezoid battery cells are connected in series.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A battery module, comprising:

the plurality of trapezoid electric cores (10) are arranged, the plurality of trapezoid electric cores (10) are sequentially arranged along the thickness direction of the trapezoid electric cores (10), the top surfaces of the plurality of trapezoid electric cores (10) face the same direction, and triangular spaces (20) are formed between adjacent trapezoid electric cores (10);

the base portion (30) is arranged on one side of the trapezoid electric core (10), the base portion (30) and the trapezoid electric core (10) are correspondingly arranged along the side face of the trapezoid electric core (10) in the length direction, the base portion (30) is provided with a fixing hole (31), the position of the fixing hole (31) corresponds to the triangular space (20), a fastening piece (32) is arranged in the fixing hole (31), and the fastening piece (32) is located in the triangular space (20).

2. The battery module according to claim 1, wherein a plurality of the trapezoid cells (10) are arranged in series through a serial bus bar (40).

3. The battery module according to claim 2, wherein the trapezoid battery cell (10) includes two posts (11), the two posts (11) are disposed at a bottom surface of the trapezoid battery cell (10) and are located at a portion of the bottom surface extending out of the top surface, the serial bus bar (40) is connected to the two posts (11) of the trapezoid battery cell (10) adjacent to each other, and the serial bus bar (40) is disposed in a manner of extending in the triangular space (20) adjacent to each other.

4. A battery module according to claim 3, wherein the serial bus bar (40) comprises a first conducting part (41), a second conducting part (42) and a connecting part (43), the first conducting part (41) and the second conducting part (42) are arranged at opposite intervals, the first conducting part (41) is connected with the pole (11) of one of the trapezoid batteries (10) adjacent to the first conducting part, the second conducting part (42) is connected with the pole (11) of the other trapezoid battery (10) adjacent to the trapezoid battery (10), and two opposite sides of the connecting part (43) are respectively connected with two sides of the first conducting part (41) and the second conducting part (42) on opposite sides.

5. The battery module according to claim 4, wherein the trapezoid battery cell (10) includes an explosion-proof valve (12), the explosion-proof valve (12) is located on a side surface of the trapezoid battery cell (10) along a width direction, a through hole (431) is formed in the connecting portion (43), and the explosion-proof valve (12) is disposed corresponding to the through hole (431).

6. The battery module according to any one of claims 1 to 5, wherein the shoe portion (30) is a bottom plate or a cold plate.

7. The battery module according to any one of claims 1-5, wherein two ends of the plurality of trapezoid electric cells (10) are respectively provided with an end plate (50), and the end plates (50) are attached to the top surface or the bottom surface of the trapezoid electric cell (10) at the end.

8. The battery module according to claim 7, further comprising a tie (60), wherein the tie (60) ties up a number of the trapezoidal cells (10) and the end plates (50).

9. The battery module according to any one of claims 1 to 5, further comprising output electrode busses (70), wherein two output electrode busses (70) are provided, and two output electrode busses (70) are respectively connected with the poles (11) of the ladder-shaped cells (10) located at two ends of the plurality of ladder-shaped cells (10).

10. A power plant comprising a battery module according to any one of claims 1-9.