CN217405532U - A battery module - Google Patents

Abstract

The utility model belongs to the technical field of the battery, a battery module is disclosed. The battery module comprises a plurality of battery cells, the battery cells are sequentially arranged along a first direction (X-axis direction in the drawing), and an air duct clamping plate is arranged between every two adjacent battery cells. Air duct splint include guide plate and a plurality of blotter, and the two sides of guide plate all are provided with a plurality of bellied water conservancy diversion check, and a plurality of water conservancy diversion check intervals set up and form heat dissipation air duct, and the one end of a plurality of blotters is connected or is connected with the guide plate with a plurality of water conservancy diversion check one-to-ones, and the other end and the electric core of a plurality of blotters contact. This battery module simple structure, low in production cost, the radiating effect is good, can effectively avoid electric core large tracts of land inflation, and the security performance is good, long service life.

Description

A battery module

technical field

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

Background technique

The battery will generate heat during the charging and discharging process. Especially when charging and discharging at a high rate, the heat around the battery increases rapidly, and the heat accumulates around the battery for a long time, which will greatly affect the service life and safety performance of the battery. Impact. Therefore, it is necessary to reasonably design the structure of the battery module so that the heat generated by the battery cells can be evacuated in time.

In a battery module in the prior art, heat sinks are usually arranged between the cells, and structures such as an insulating and heat-conducting layer or a heat-insulating layer are arranged on the heat sink. With this heat dissipation method, the arrangement of the cells is too compact, and it is difficult to meet the heat dissipation requirements during high-rate charging, resulting in a significant reduction in the service life of the battery module, and the expansion and deformation of the cells are not subject to any constraints, resulting in a significant reduction in cycle life. After multiple cycles of charge and discharge, it is easy to cause thermal runaway and reduce safety performance.

Therefore, it is urgent to propose a battery module with better heat dissipation effect and can effectively prevent the thermal expansion of the battery cells to solve the above problems.

Utility model content

The purpose of the present utility model is to provide a battery module, which has the advantages of cooling effect, avoiding heat accumulation, long service life, high safety performance, simple structure and low production cost.

For this purpose, the utility model adopts the following technical solutions:

A battery module includes a plurality of electric cores, the plurality of electric cores are arranged in sequence along a first direction, an air duct splint is arranged between the adjacent electric cores, and the air duct splint comprises a guide plate and a plurality of A plurality of buffer pads are arranged on both sides of the air guide plate, and a plurality of raised air guide grids are arranged on both sides. The guide grids are connected in a one-to-one correspondence or with the guide plates, and the other ends of the plurality of buffer pads are in contact with the battery cells.

Optionally, the height of the flow guiding grid in the first direction is smaller than the height of the buffer pad in the first direction.

Optionally, the flow guide grid is an annular convex rib, the convex rib and the flow guide plate form a groove, and the buffer pad is fixed in the groove.

Optionally, the buffer pad is pasted in the groove.

Optionally, the cross-sectional shape of the flow guiding lattice in the second direction is a polygon or a circle.

Optionally, the material of the buffer pad is silica gel.

Optionally, it also includes end plates, the end plates are located on both sides of the battery module along the first direction.

Optionally, a silicone pad is arranged between the end plate and the battery core.

Optionally, a cover plate is also included, the cover plate is disposed on the top of the battery cells, and is fixedly connected with the end plate, and is used to limit the position of the plurality of battery cells.

Optionally, the bottom of the battery core is provided with an insulating support.

The beneficial effects of the present utility model are:

In the battery module provided by the utility model, an air duct splint is arranged between two adjacent battery cells, and the air duct splint comprises a guide plate and a guide grid arranged on the guide plate at intervals. A certain gap is formed between the adjacent cells, and the interval between the guide grids forms an air duct on the wall of the guide plate. The air duct has a low flow resistance to achieve the overcurrent effect of the extruded splint. Most of the surface can directly contact the heat dissipation airflow, the heat dissipation effect is significantly stronger than that of the conventional extruded splint, and it can provide enough space for the evacuation of the heat of the cell to avoid heat accumulation. By setting a buffer pad on the guide grid, the buffer pad is in contact with the wall surface of the cell, which can absorb the dimensional tolerance of the cell in the thickness direction, and has a certain buffering effect on the expansion of the cell, effectively preventing the large area of the cell, Large expansion, so that the expansion of the cell is within a reasonable range. The battery module has simple structure, low production cost, good heat dissipation effect, can effectively avoid large-area expansion of the battery cell, has good safety performance and long service life.

Description of drawings

1 is an exploded view of a battery module provided by the present invention;

Fig. 2 is the assembly drawing of the battery module provided by the present invention;

Fig. 3 is the exploded view of the air duct splint provided by the utility model;

Figure 4 is an assembly diagram of the air duct splint provided by the present invention.

In the picture:

100, battery core; 200, air duct splint; 210, deflector; 220, deflector grid; 230, buffer pad; 300, end plate; 400, cover plate; 510, first fixing part; 520, second fixing Pieces; 600, silicone pad; 700, aluminum row bracket; 710, aluminum row; 800, insulating bracket.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within 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" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Wherein, the terms "first position" and "second position" are two different positions, and the first feature being "above", "over" and "above" the second feature includes the first feature being "over" the second feature Directly above and diagonally above, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as a limitation of the present invention.

Most of the air duct splints in the existing power battery modules are formed by extruding profiles to form harmonica tubular air ducts to dissipate heat from the battery module. Extruded aluminum needs to be insulated and protected, and the cost is high, while extruded engineering plastics have low precision and are not suitable for thin-wall extrusion. Alternatively, the battery module is dissipated by arranging a heat sink and an insulating and heat-conducting layer between the cells. This method is not suitable for high-rate charge and discharge cells. The cells are easily expanded and deformed after being heated, and the service life is short. Poor, this embodiment provides a battery module, which effectively solves the above problem.

FIG. 1 shows an exploded view of the battery module provided in this embodiment. Referring to FIG. 1 , the battery module includes a plurality of battery cells 100 , and the plurality of battery cells 100 are arranged in sequence along a first direction (the X-axis direction in the figure). , an air duct splint 200 is arranged between adjacent cells 100 . The air duct splint 200 includes a deflector 210 and a plurality of buffer pads 230. Both sides of the deflector 210 are provided with a plurality of protruding air guide grids 220. One end of the buffer pads 230 is connected to the plurality of guide grids 220 in a one-to-one correspondence or is connected to the guide plate 210 , and the other ends of the plurality of buffer pads 230 are in contact with the cells 100 .

The air duct splint 200 of the above-mentioned battery module is arranged between two adjacent battery cells 100 . A certain gap is formed between the adjacent cells 100 , and the space between the guide grids 220 forms an air channel on the wall of the guide plate 210 , so as to provide enough space for heat evacuation of the cells 100 and avoid heat accumulation. At the same time, the air duct has a lower flow resistance, which achieves the overcurrent effect of the extruded splint. Most of the surface of the battery cell 100 can directly contact the heat dissipation airflow, and the heat dissipation effect is significantly stronger than that of the conventional extruded splint. A buffer pad 230 is arranged on the flow guide grid 220, and the buffer pad 230 is in contact with the wall surface of the battery cell 100, which can absorb the dimensional tolerance of the battery cell 100 in the thickness direction, and effectively prevent the battery cell 100 from heating up in a large area and greatly. The expansion has a certain restraining effect on its deformation, so that the expansion of the battery cell 100 is within a reasonable range. The battery module has the advantages of simple structure, low production cost, good heat dissipation effect, can effectively avoid large-area expansion of 100 battery cells, good safety performance and long service life.

Continuing to refer to FIG. 1 , the battery module in this embodiment has 8 battery cells 100 , and the 8 battery cells 100 are arranged vertically. The larger areas of the battery cells 100 are opposite to each other to form a rectangular parallelepiped battery pack. In other embodiments, the number of the battery cells 100 may be 6, 10, or 12, etc., which can be set according to usage needs. The top of the battery cell 100 is provided with an aluminum row bracket 700 , and the aluminum row bracket 710 is arranged on the aluminum row bracket 700 to electrically connect the plurality of battery cells 100 . In other embodiments, the aluminum bar 710 may be replaced with a copper bar or other conductors, as long as the components that can connect the battery cells 100 in series or in parallel are within the scope of protection of the present application.

Further, referring to FIG. 1 and FIG. 2, the battery module further includes end plates 300. The end plates 300 are located on both sides of the battery module along the third direction (the Z-axis direction in the figure), and the battery module is located on the first side. The upper limit is performed to ensure the compact structure of the battery cell 100 . In this embodiment, air duct splints 200 are arranged between adjacent cells 100, and silicone pads 600 are arranged between the cells 100 at the head and tail ends and the end plates 300. The silicone pads 600 are used for heat conduction and improve the battery mold. The overall heat conversion capability of the group keeps the battery module working in a lower temperature environment.

The top of the cell 100 is further provided with a cover plate 400 , and the cover plate 400 can limit the position of the cell 100 in the second direction (the Y-axis direction in the figure). The cover plate 400 and the end plate 300 are fixedly connected, so that the cell 100 can be limited in the first direction and the second direction at the same time.

In order to fix the connection end plate 300 and the cover plate 400, in this embodiment, a fixing member is provided, and the fixing member is a sheet metal bracket. The fixing members include a first fixing member 510 located at the top of the battery cell 100 and a second fixing member 520 located at the bottom of the battery cell 100 . As shown in FIG. 2 , the first fixing members 510 are L-shaped plates, two of which are provided, and are located on both sides of the battery cell 100 along the first direction. During assembly, the first fixing member 510 is attached to the side surface of the cover plate 400 and the cell 100 , and the cover plate 400 is pressed on the top of the cell 100 . In addition, both ends of the first fixing member 510 press against the top of the end plate 300 , and mounting holes are provided at both ends of the first fixing member 510 . The top of the end plate 300 is also provided with mounting holes at corresponding positions, and the screws pass through the first fixing member 510 . The assembly hole on the end plate 300 is then inserted into the assembly hole on the end plate 300, and the two are fixedly connected. The second fixing member 520 includes an L-shaped plate and connecting plates at both ends, and the connecting plates are provided with mounting holes. There are also two second fixing members 520, which are attached to the bottom surface and side surface of the cell 100. The connecting plate is attached to the end plate 300. The end plate 300 is provided with mounting holes at corresponding positions. The second fixing members 520 and The end plates 300 are fixedly connected by screws. The battery cell 100 is fixed in this way, which is very convenient to assemble and disassemble.

Further, the bottom of the battery cell 100 is provided with an insulating support 800. The insulating support 800 is L-shaped and located between the bottom of the battery cell 100 and the second fixing member 520. The insulating support 800 is provided to prevent the battery cell 100 from being directly connected to the second fixing member. 520 is in direct contact to prevent the heat between the battery cell 100 and the second fixing member 520 from being easily dissipated, and meanwhile, a certain heat dissipation space is left at the bottom of the battery cell 100 .

The structure of the air duct splint 200 is shown in FIG. 3 and FIG. 4 . An air duct splint 200 is provided between two adjacent cells 100 , and the air duct splint 200 includes a guide plate 210 , a guide grid 220 arranged on both sides of the guide plate 210 , and a guide grid 220 . the buffer pad 230. The guide plate 210 is a rectangular flat plate. In this embodiment, the guide plate 210 is a plastic plate. The plastic plate has a good heat insulation effect and can prevent heat transfer between the cells 100 .

Further, the height of the guide grid 220 in the first direction is smaller than the height of the buffer pad 230 in the first direction. Therefore, the end of the buffer pad 230 that is not connected to the guide grid 220 can be in contact with the battery cell 100 .

Continuing to refer to FIG. 3 and FIG. 4 , the guide grid 220 is an annular rib, which can be integrally formed with the guide plate 210 . It is understood that the annular rib can form a groove with the guide plate 210 on the guide plate 210 . , the buffer pad 230 is fixed in the groove. The guide grid 220 is arranged in the form of a convex rib, so that the buffer pad 230 can be positioned in the guide grid 220 to prevent the buffer pad 230 from being misplaced or dropped due to being squeezed by the expanded battery cell 100 , which cannot prevent the leakage of electricity. The effect of large area and large deformation of the core 100. Of course, in other embodiments, the guide grid 220 and the buffer pad 230 may also be arranged at intervals. Since the position of the air guide grid 220 on both sides of the air guide plate 210 is the same, and the buffer pad 230 is fixed in the air guide grid 220, the position of the buffer pad 230 on both sides of the air guide plate 210 is the same. When the wall surface of the battery cell 100 on the side is expanded, the force can be evenly applied, and the expansion of the battery cell 100 can be buffered.

Further, in this embodiment, the guide grids 220 are arranged in an orderly row on the guide plate 210 , and the guide grids 220 are symmetrically distributed on the guide plate 210 with respect to the axis of the guide plate 210 , thereby preventing the cells 100 Unbalanced stress. The positions of the guide grids 220 on both sides of the guide plate 210 are the same, so that the same air ducts can be formed on both sides, so as to ensure the heat balance between the cells 100 and avoid high local temperature. In this embodiment, the cross-sectional shape of the flow guide grid 220 in the second direction is a rhombus, and the shape of the buffer pad 230 is a rhombus block. In other embodiments, the shape of the guide grid 220 on the vertical plane may be other polygons, such as rectangles, hexagons, etc., and may also be circles, ellipses, olive shapes, or other streamline shapes. The guide grids 220 are staggered and have a certain distance from each other, so that the flow resistance to the heat dissipation airflow is small. At the same time, the surface of the battery cell 100 can directly contact the heat dissipation airflow, which greatly improves the heat dissipation capability of the module.

Optionally, the buffer pad 230 is configured as a single-sided adhesive, so that the back side of the buffer pad 230 can be pasted on the deflector 210 and fixed in the groove. It is very convenient to fix the buffer pad 230 by means of bonding, and can effectively prevent the buffer pad 230 from falling off from the guide grid 220 . The buffer pad 230 can be a rectangular block, a cylindrical shape, etc., and can be set according to the shape of the flow guide grid 220. As long as the structure can play a corresponding role, it is within the protection scope of the present application, and is not specifically limited here. In this embodiment, the material of the buffer pad 230 is silica gel, and the silica gel has insulating properties, corrosion resistance and good heat insulation effect. Its function is to absorb the dimensional tolerance in the thickness direction of the battery cell 100, and at the same time restrain the expansion of the battery cell 100, play a certain buffering effect on the expansion and deformation of the battery cell 100, prevent the deformation of the battery cell 100 from being too large, and improve the cycle life of the module. In other embodiments, other buffer materials can be adaptively replaced.

Compared with the air duct splint 200 made of extruded profiles in the prior art, the above-mentioned air duct splint 200 has a simple structure, low manufacturing cost, simple installation and maintenance, and can effectively avoid battery cells while having a good heat dissipation effect. 100 large area expansion.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims (10)

1. A battery module, characterized in that it comprises a plurality of battery cells (100), a plurality of the battery cells (100) are arranged in sequence along a first direction, and a plurality of the battery cells (100) are arranged between adjacent ones of the battery cells (100). An air duct splint (200), the air duct splint (200) includes a baffle plate (210) and a plurality of buffer pads (230), and both sides of the baffle plate (210) are provided with a plurality of raised guide plates Flow grids (220), a plurality of the flow guide grids (220) are arranged at intervals to form heat dissipation air ducts, and one end of the plurality of the buffer pads (230) is connected to the plurality of the flow guide grids (220) in a one-to-one correspondence or Connected to the guide plate (210), the other ends of the plurality of buffer pads (230) are in contact with the battery core (100). 2 . The battery module according to claim 1 , wherein the height of the flow guide grid ( 220 ) in the first direction is smaller than the height of the buffer pad ( 230 ) in the first direction. 3 . 3 . The battery module according to claim 1 , wherein the guide grid ( 220 ) is an annular convex rib, and the convex rib and the guide plate ( 210 ) form a groove, and the A buffer pad (230) is fixed in the groove. 4. The battery module according to claim 3, wherein the buffer pad (230) is pasted in the groove. 5 . The battery module according to claim 1 , wherein a cross-sectional shape of the flow guide grid ( 220 ) in the second direction is a polygon or a circle. 6 . 6. The battery module according to claim 1, wherein the buffer pad (230) is made of silica gel. 7 . The battery module according to claim 1 , further comprising end plates ( 300 ), and the end plates ( 300 ) are located on both sides of the battery module along the first direction. 8 . 8 . The battery module according to claim 7 , wherein a silicone pad ( 600 ) is arranged between the end plate ( 300 ) and the battery core ( 100 ). 9 . 9 . The battery module according to claim 7 , further comprising a cover plate ( 400 ), and the cover plate ( 400 ) is disposed on the top of the battery cell ( 100 ), and is connected with the end plate ( 9 . 300) fixed connection for limiting the position of a plurality of the battery cells (100). 10. The battery module according to any one of claims 1-9, wherein an insulating bracket (800) is provided at the bottom of the battery cell (100).

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