CN106784496A - Battery module - Google Patents

Abstract

The invention discloses a battery module which comprises a plurality of batteries, two shells and two electrode plates. The two ends of the battery are respectively fixed in the shell, each shell comprises a plurality of lugs, and a plurality of air flow channels are arranged between the lugs. The electrode plates are respectively arranged between the two ends of the battery and the shell.

Description

battery module

technical field

The invention relates to a battery module.

Background technique

A battery module is usually formed by combining a large number of batteries in series or in parallel. However, during the charging and discharging process of the battery, a large amount of heat energy is often generated. If the heat energy cannot be effectively dissipated, the temperature of the battery will rise, thereby changing the electrical characteristics of the battery. For the battery module, if the temperature difference between the batteries is too large or the operating temperature is too high, the power supply efficiency of the battery module will be reduced, the overall service life will be shortened, and the risk of spontaneous combustion may be caused.

Therefore, how to improve the heat dissipation efficiency of the battery module without increasing too much production cost and heat dissipation space has become an important issue.

Contents of the invention

In order to solve the above problems, an embodiment of the present invention provides a battery module that is convenient for interlocking and fixing and ensures effective heat dissipation, which includes a plurality of batteries with opposite ends, two casings, and two electrode sheets. The two ends of the battery are respectively fixed in the casing, each casing includes a plurality of protrusions, and there are a plurality of first air channels between the protrusions. The electrode sheets are respectively arranged between the two ends of the battery and the casing.

In one or more embodiments of the present invention, the bump protrudes along the direction of the connecting line between the two ends of the battery.

In one or more embodiments of the present invention, the bumps are arranged in an array, and the first air channels are arranged along two different directions.

In one or more embodiments of the present invention, the protrusions can be hollow structures, each protrusion has two openings, and the openings are arranged face to face, so as to define a plurality of second air passages passing through the protrusions.

In one or more embodiments of the present invention, the heat dissipation module further includes a plurality of heat dissipation elements respectively disposed between the electrode sheet and the casing, and a part of the heat dissipation elements is located in the second air channel.

In one or more embodiments of the present invention, each heat dissipation element has heat dissipation fins, and the second air channel passes through the gaps between the heat dissipation fins.

In one or more embodiments of the present invention, the electrode sheets respectively have a first connection portion and a second connection portion, and the first connection portion and the second connection portion are not coplanar.

In one or more embodiments of the present invention, the casing includes a plurality of clamping portions for clamping the battery, the electrode sheet has a plurality of through holes, and the clamping portions pass through the through holes.

In one or more embodiments of the present invention, the height of the clamping portion is not greater than half of the height of the battery.

In one or more embodiments of the present invention, the battery module further includes a heat dissipation base disposed between the electrode sheets, the heat dissipation base includes a plurality of accommodating spaces, the batteries are respectively located in the accommodating spaces, and are connected to the heat dissipation base touch.

In one or more embodiments of the present invention, the heat dissipation base includes at least one protrusion, and the protrusion protrudes from the outer edge of the battery.

Based on the above, in one or more embodiments of the present invention, protrusions are provided on the casing via the battery module to form the first air passage, and the protrusions may have openings to form the second air passage. The design of the first air channel and the second air channel can improve the heat exchange efficiency of the electrode sheet, thereby improving the heat dissipation efficiency of the battery module. In addition, after the battery module can be selectively equipped with heat dissipation elements in the casing and the heat dissipation base casing is provided with protrusions to form the first air flow channel, the heat dissipation efficiency of the battery module can indeed be greatly improved, and Further improve the heat dissipation efficiency of the battery module.

Description of drawings

In order to make the above and other purposes, features, advantages and embodiments of the present invention more obvious and understandable, the detailed description of the accompanying drawings is as follows:

1 and 2 are a perspective view and an exploded view of an embodiment of a battery module of the present invention, respectively.

FIG. 3 is a perspective view of an embodiment of the casing of the battery module of the present invention.

FIG. 4 is a perspective view of an embodiment of the electrode sheet of the battery module of the present invention.

5A to 5F are schematic diagrams of different stages of assembly of an embodiment of the battery module of the present invention.

6A and 6B are respectively a perspective view and a side view of an application embodiment of the battery module of the present invention.

7A and 7B are an exploded view and a side view of another embodiment of the battery module of the present invention, respectively.

FIG. 8 is a disassembled view of another embodiment of the battery module of the present invention.

9A and 9B are respectively a top view and a cross-sectional view of an application of the battery module of FIG. 8 .

FIG. 10 is a disassembled view of another embodiment of the battery module of the present invention.

FIG. 11 is a cross-sectional view of an application of the battery module of FIG. 10 .

FIG. 12 is a disassembled view of another embodiment of the battery module of the present invention.

FIG. 13 is a cross-sectional view of an application of the battery module of FIG. 12 .

Wherein, the reference signs are explained as follows:

100: battery module

200: battery

210, 220: terminal

300, 300a, 300b: housing

310: Bump

312: opening

320, 320a, 320b: clamping part

330: engaging part

332: hook

334: card slot

336: screw hole

400: electrode sheet

402: Part I

404: Part Two

410: through hole

420: The first connecting part

430: second connection part

440: Conductive Structure

500: Concave

510: convex part

600: cooling element

610: cooling fins

700a, 700b, 700c: Thermal base

710: Storage space

720, 720a, 720b: protrusions

1000: battery array

2000: Chassis

2002: Underside

2004: Side

2010: track

2012: Baffles

2014: Wings

2020: Cooling openings

P1: the first air channel

P2: Second air channel

X, Y, Z: direction

detailed description

The following will clearly illustrate the spirit of the present invention with the accompanying drawings and detailed descriptions. After any person skilled in the art understands the preferred embodiments of the present invention, they can be changed and modified by the technology inspired by the present invention. depart from the spirit and scope of the present invention.

Referring to FIG. 1 and FIG. 2 , they are respectively a perspective view and an exploded view of an embodiment of the battery module of the present invention. The battery module 100 includes a plurality of batteries 200 , two casings 300 , and two electrode sheets 400 . The battery 200 has two opposite ends 210 , 220 , and the two ends 210 , 220 of the battery 200 are positive and negative electrodes of the battery 200 respectively. A plurality of batteries 200 are arranged parallel to each other, and the positive and negative electrodes of each battery 200 face the same direction. For example, if one end 210 of the batteries 200 is positive, the other end 220 of the batteries 200 is negative.

The housings 300 are respectively located on two sides of the battery 200 , and the two ends 210 , 220 of the battery 200 are respectively fixed in the two housings 300 . The material of the casing 300 can be an insulating material to electrically isolate the battery 200 from the external environment. The material of the housing 300 can be thermoplastic, and the housing 300 can be manufactured by injection molding. The casings 300 located on both sides of the battery 200 have substantially the same shape, that is, the two casings 300 can be manufactured by using the same mold. If it is necessary to identify the two casings 300 , for example, in order to distinguish the positive and negative polarities of the battery module 100 , the two casings 300 can be made of materials of different colors, and the two casings 300 are separated by different colors.

The two electrode sheets 400 are respectively located between the two ends 210 , 220 of the battery 200 and the case 300 , and the electrode sheets 400 contact the two ends 210 , 220 of the battery 200 respectively. The material of the electrode sheet 400 is a material with low resistance and high thermal conductivity, such as metal. The electrode sheet 400 can be made by punching and bending. Since the positive and negative poles of the two ends 210, 220 of the battery 200 are in close contact with the electrode sheet 400 respectively, the electrode sheet 400 can be used as a common electrode of the battery 200 to connect the positive and negative electrodes of the battery 200, and the positive and negative electrodes of the battery 200 It can be connected to the outside through the electrode sheet 400 .

Since the battery module 100 generates a lot of heat during operation, and most of the heat is concentrated on the electrodes at the two ends 210 and 220 of the battery 200 , the heat energy generated during the operation of the battery module 100 will also be accumulated on the electrode sheet 400 . If the heat energy cannot be dissipated in real time, the working temperature of the battery module 100 will be higher and higher, thereby reducing the service life of the battery 200 . In order to solve the heat dissipation problem, the battery module 100 has multiple designs for improving heat dissipation efficiency.

There are a plurality of protrusions 310 on the casing 300, and the protrusions 310 protrude along the direction of the line connecting the two ends 210, 220 of the battery 200, that is, the extending direction of the protrusions 310 is along the long axis of the battery 200. Extend outward. There are a plurality of first air passages P1 between the protrusions 310, and the first air passages P1 are continuous air passages, that is, each first air passage P1 extends from one side of each housing 300 to the other. one side. In some embodiments, the bumps 310 are rectangular in shape, and the bumps 310 are arranged in an array. Therefore, the first air passages P1 between the bumps 310 are also distributed in a grid (or called a mesh). , that is, the first air passages P1 are arranged along two different directions, and a part of the first air passages P1 is perpendicular to another part of the first air passages P1 . In other embodiments, the shape of the protruding block 310 may be rhombus, circle or other shapes, and the shape of the corresponding first air channel P1 may change accordingly, but it is still continuous.

Since the continuous first air channel P1 is disposed adjacent to the electrode sheet 400, when the air flows through the first air channel P1, the heat accumulated at the electrode sheet 400 can be quickly taken away through the heat exchange effect, Further, the heat dissipation efficiency of the battery module 100 is improved. Furthermore, because the first air passage P1 extends along two different directions, the flow rate of air flowing through the first air passage P1 can be effectively increased.

Next, please refer to FIG. 3 , which is a perspective view of an embodiment of the casing of the battery module of the present invention. The protrusion 310 of the casing 300 may further be provided with a second air channel P2 to further enhance the heat dissipation efficiency of the casing 300 . For example, the bump 310 can be a hollow structure, and one or more openings 312 can be provided on the surface of the bump 310, so that air can enter the bump 310 through the opening 312 to exchange heat with the electrode sheet 400, and the air flow can directly Flowing on the electrode sheet 400 can achieve the purpose of heat dissipation more effectively.

In some embodiments, each protrusion 310 is provided with two openings 312 , and the two openings 312 are respectively located on opposite sides of the protrusion 310 . The openings 312 may be disposed face to face to define the second air channel P2 passing through the bump 310 . The opening 312 on each protrusion 310 can be aligned with the opening 312 on the adjacent protrusion 310 , so that the second air channel P2 of the adjacent protrusion 310 is also continuous. In other words, the second air channel P2 also extends from one side of each casing 300 to the other side. Since the second air channel P2 is continuous and runs through the protrusion 310, when the air flows through the second air channel P2, the air can directly exchange heat with the electrode sheet 400 in the housing 300 to further lift the housing 300. cooling efficiency.

In some embodiments, the material of the casing 300 can be a plastic with better thermal conductivity, for example, a thermally conductive plastic with a thermal conductivity greater than 2W/m-k can be selected as the material of the casing 300, so that the battery 200 in the central area of the battery module 100 can also The heat can be dissipated through the housing 300 , thereby reducing the temperature difference between the batteries 200 .

The housing 300 includes a plurality of clamping parts 320 , and the clamping parts 320 are disposed on the inner surface of the housing 300 , so as to fix the battery 200 in the housing 300 by using the clamping parts 320 . The clamping part 320 can be a columnar structure (such as the clamping part 320a) or an elastic piece (such as the clamping part 320b). out of the space.

In some embodiments, the height of the clamping portion 320 , that is, the distance from the clamping portion 320 to the casing 300 is no more than half the height of the battery, so that when the two casings 300 are engaged with each other, the clips in the two casings 300 The holding parts 320 do not contact each other, so there is no problem that the space between the batteries is blocked by the holding parts 320 , resulting in low heat dissipation efficiency. In other words, the battery 200 is only provided with clamping portions 320 at both ends, the center of the battery 200 is not in contact with the clamping portion 320, and the clamping portion 320 is in partial contact with the two ends of the battery 200, so that more heat can be obtained. Convective cooling area.

Each housing 300 has a plurality of engaging parts 330, the height of the engaging part 330 is greater than the height of the clamping part 320, and the engaging part 330 on each housing 300 has a hook 332 and a groove 334. Further, each The engaging portion 330 on the housing 300 forms an engaging structure with the corresponding engaging portion 330 on each housing 300, for example, as shown in FIG. The joint part 330 has a hook 332, and the corresponding joint part 330 on the housing 300 on the right side of the drawing has a slot 334. By engaging the corresponding hook 332 with the slot 334, Furthermore, the two casings 300 are combined. More clearly, the bottom surface of the housing 300 is rectangular, and each housing 300 includes two hooks 332 and two slots 334 . In some embodiments, the two hooks 332 are respectively disposed at two opposite corners of the housing 300 , while the engaging slots 334 are disposed at the other two opposite corners of the housing. In other embodiments, the two hooks 332 can be disposed on the long side or the short side of the casing 300 , while the two hooks 334 are disposed on the other long side or the other short side. The engaging portion 330 may further be provided with a plurality of screw holes 336 , and after the two casings 300 are engaged with each other through the engaging structure, screws can be locked in the screw holes 336 to lock the two casings 300 .

Referring to FIG. 4 , it is a perspective view of an embodiment of the electrode sheet of the battery module of the present invention. The electrode sheet 400 has a plurality of through holes 410 , which can be made by stamping a metal sheet, and the through holes 410 can pass through the clamping portion 320 in FIG. 3 . In some embodiments, the shape of the through hole 410 matches the shape of the clamping portion 320 , so that the inner edge of the through hole 410 is in contact with the clamping portion 320 to position the electrode sheet 400 in the housing 300 .

The electrode sheet 400 includes a first portion 402 and two second portions 404 bent from the first portion 402 , the first portion 402 is substantially perpendicular to the long axis of the battery 200 . The area of the first portion 402 is greater than that of the second portion 404 , and the through hole 410 is located on the first portion 402 . In some embodiments, the first portion 402 and the second portion 404 are substantially perpendicular to each other. The electrode sheet 400 has a first connection part 420 and a second connection part 430 , and the first connection part 420 and the second connection part 430 are respectively located in the first part 402 and the second part 404 . The function of the first connection part 420 and the second connection part 430 is to make the electrode sheet 400 contact with the outside world, therefore, the first connection part 420 and the second connection part 430 are respectively arranged on different planes, such as arranged in the first part perpendicular to each other 402 and the second part 404 will help to improve the flexibility of battery module wiring.

Referring next to FIG. 5A to FIG. 5F , they are schematic diagrams of different stages of assembly of an embodiment of the battery module of the present invention. 5A is to provide a housing 300a, and place the battery 200 in the housing 300a. The battery 200 can be clamped and positioned by the clamping portion 320 (see FIG. 3 ) on the housing 300a, in other words, the battery 200 is accommodated in the clamp. In the space between the holding parts 320 , the battery 200 is positioned in contact with the holding parts 320 .

During the process of assembling the battery 200 , the battery 200 can be directly positioned in the casing 300 a without using additional jigs to fix the battery 200 . In addition, the casing 300a of plastic material can directly serve as an insulating material and protect the battery 200 therein.

Next, FIG. 5B uses a spot welding process, and the electrode sheet 400 is fixed on one side of the battery 200, so that the electrodes at the same end of the battery 200 are all in contact with the electrode sheet 400, and the electrode sheet 400 is used as a common positive electrode or a common negative electrode of the battery 200.

After the electrode sheet 400 is fixed on the battery 200 , a plurality of conductive structures 440 are disposed on the first connection portion 420 and the second connection portion 430 of the electrode sheet 400 . In some embodiments, the conductive structure 440 can be a nut, and is respectively fixed on the first connecting portion 420 and the second connecting portion 430 by spot welding.

In FIG. 5C , another casing 300 b is mounted on the other end of the battery 200 . The engaging structures on the two housings 300a, 300b are arranged corresponding to each other. For example, a pair of hooks 332 and engaging slots 334 are respectively arranged at corresponding positions on the two housings 300a, 300b.

Then, turn over the shells 300a, 300b, and remove the upper shell 300a, as shown in FIG. 5D , so as to install another electrode sheet 400 on the other end of the battery 200 . The electrode sheet 400 can also be fixed on the other side of the battery 200 using a spot welding process, so that the electrodes at this end of the battery 200 are all in contact with the electrode sheet 400 , so that the electrode sheet 400 serves as a common negative electrode or a common positive electrode of the battery 200 .

After the electrode sheet 400 is fixed on the battery 200 , a plurality of conductive structures 440 are disposed on the first connection portion 420 and the second connection portion 430 of the electrode sheet 400 . In some embodiments, the conductive structure 440 can be a nut, and is respectively fixed on the first connecting portion 420 and the second connecting portion 430 by spot welding.

Then, as shown in FIG. 5E , cover the case 300 a back to the other end of the battery 200 . As mentioned above, because the clamping portion 320 (refer to FIG. 3 ) is in partial contact with the battery 200, that is, the clamping portion 320 does not completely cover the side surface of the battery 200, so that the electrode sheet 400 can be prevented from being caught by the clamping portion. 320 to maintain the continuity of the electrode sheet 400.

When installing the casings 300a, 300b, the two casings 300a, 300b can be combined and fixed by engaging the hook 332 with the slot 334 . Then, screw the screw 340 into the screw hole 336 on the casing 300 to lock the two casings 300a, 300b, as shown in FIG. 5F . In the battery module 100 , the conductive structure 440 connected to the electrode sheet 400 is exposed to the casings 300 a and 300 b to facilitate the connection of the battery module 100 to an external circuit. The conductive structure 440 at the first connecting portion 420 (see FIG. 4 ) and the conductive structure 440 at the second connecting portion 430 (see FIG. 4 ) are respectively located on different surfaces of the housings 300a and 300b, such as respectively located on the shell The top and side surfaces of the body 300a, 300b, therefore, each electrode piece 400 (see FIG. 4 ) can be electrically connected from two directions (ie, the top surface and the side surface), which effectively improves the flexibility of the connection of the battery module 100 .

Referring to FIG. 6A and FIG. 6B , they are respectively a perspective view and a side view of an application embodiment of the battery module of the present invention. A plurality of battery modules 100 can be further connected in series or in parallel to form a battery array 1000 . As mentioned above, since the two casings 300 in each battery module 100 can be made of plastic materials of different colors, when connecting the battery modules 100, the positive and negative polarities of the battery modules 100 can be easily distinguished. , which is convenient for series or parallel connection.

In order to facilitate splicing the battery modules 100 into a battery array 1000 , the casing 300 of the battery module 100 has a plurality of concave parts 500 and convex parts 510 (see FIG. 5F at the same time). The concave portion 500 and the convex portion 510 are substantially elongated, and the long axis directions of the concave portion 500 and the convex portion 510 are parallel to the long axis direction of the battery 200 . Two adjacent battery modules 100 can be positioned by respectively engaging the recesses 500 and the protrusions 510 of the two adjacent battery modules 100 . For example, the battery modules 100 in this embodiment are placed horizontally in the case 2000, and the concave parts 500 and the convex parts 510 of two adjacent battery modules 100 in the direction of their long axes (that is, the X direction in the figure) are mutually aligned. When matched, the battery modules 100 can be connected in series along the X direction by engaging the facing recesses 500 and protrusions 510 . In other embodiments, the battery modules 100 can be directly placed in the case 2000 , or the battery modules 100 can be connected in series along the Z direction, which will not be repeated here.

In some embodiments, the chassis 2000 is more selectively provided with a rail 2010 for guiding the battery module 100 into the chassis 2000 and for positioning the battery module 100 . For example, the rails 2010 are also arranged parallel to the direction of the X axis, and the distance between the rails 2010 is equal to or slightly greater than the height of the battery module 100 (parallel to the long axis of the battery 200). The battery module 100 can slide into the case 2000 and be positioned between the rails 2010 .

The track 2010 may include a baffle 2012 and a wing 2014 extending outward from the baffle 2012 , wherein the baffle 2012 is upright on the bottom 2002 of the chassis 2000 , and the wing 2014 is parallel to the bottom 2002 of the chassis 2000 . The height of the baffle 2012 , that is, the distance between the baffle 2012 and the bottom surface 2002 is substantially equal to the width of the protrusion 310 , so that the wing 2014 is located in the first air channel P1 . In this way, the baffle 2012 can be used to position the battery module 100 in the Y direction, and the wing 2014 can be used to position the battery module 100 in the Z direction.

The case 2000 can further be provided with a plurality of heat dissipation openings 2020 , and the heat dissipation openings 2020 are distributed on the bottom surface 2002 and the side surface 2004 of the case 2000 , so that air can enter the interior of the case 2000 through the heat dissipation openings 2020 to exchange heat with the battery module 100 . In some embodiments, the direction of the heat dissipation opening 2020 is parallel to the direction of part of the first air channel P1, and at least part of the heat dissipation opening 2020 will be located between adjacent protrusions 310, so that air enters from the heat dissipation opening 2020 Behind the case 2000, the battery module 100 can be dissipated through the first air channel P1.

It can be known from the above embodiments that the battery module can utilize the first air channel between the bumps to increase the heat dissipation efficiency of the battery module. The housing of the battery module can be directly used as a jig for positioning the battery during assembly, thereby saving the assembly process and the cost of the equipment. In addition, since the electrode sheet can be connected to the external circuit from the top surface and the side of the battery module, the application flexibility of the battery module is also improved. In the following embodiments, how to further improve the characteristics of the heat dissipation efficiency of the battery module will be described, and the same parts as the previous embodiments will not be repeated.

Referring to FIG. 7A and FIG. 7B , they are an exploded view and a side view of another embodiment of the battery module of the present invention, respectively. In this embodiment, the battery module 100 further includes a plurality of heat dissipation elements 600 , and the heat dissipation elements 600 are disposed between the electrode sheets 400 and the casing 300 . The heat dissipation element 600 can be fixed on the electrode sheet 400 by thermally conductive glue or solder, and be in physical contact with the electrode sheet 400 , so as to dissipate the heat accumulated in the electrode sheet 400 through the heat dissipation element 600 .

In some embodiments, the heat dissipation element 600 is located on both sides of the through hole 410 of the electrode sheet 400, so that the through hole 410 is exposed between the heat dissipation elements 600, so that the clamping part on the housing 300 can pass between the heat dissipation elements 600 and pass through the through hole 410 . The heat dissipation element 600 includes a plurality of heat dissipation fins 610 to increase the heat exchange area between the heat dissipation element 600 and the air. The heat dissipation element 600 is made of metal with high thermal conductivity, such as copper or aluminum. After the battery module 100 is assembled, the heat dissipation element 600 can be partially exposed through the opening 312 of the bump 310 , so that air enters the casing 300 through the opening 312 to exchange heat with the heat dissipation element 600 .

In some embodiments, the dissipating element 600 is arranged to match the protrusion 310 on the housing 300, that is, the long axis direction of the heat dissipating element 600 is parallel to the long axis direction of the protrusion 310, and the heat dissipating fins on the heat dissipating element 600 610 are distributed in groups in the hollow bumps 310 . The arrangement direction of the cooling fins 610 is substantially parallel to the connection direction of the openings 312, so that the gap between the cooling fins 610 is also parallel to the direction of the second air channel P2, so that the second air channel P2 passes through the cooling fins. 610 gaps between.

By setting the heat dissipation element 600 in contact with the electrode sheet 400, the heat accumulated in the electrode sheet 400 can be dissipated through the heat dissipation element 600, and since the second air channel P2 in the housing 300 will pass through the gap between the heat dissipation fins 610, therefore The heat exchange efficiency of the heat dissipation element 600 can be greatly increased, thereby improving the heat dissipation efficiency of the battery module 100 .

Referring to FIG. 8 , it is an exploded view of another embodiment of the battery module of the present invention. In this embodiment, the battery module 100 further includes a heat dissipation base 700a, the heat dissipation base 700a is disposed between the casings 300, and the battery 200 is positioned in the heat dissipation base 700a. The material of the heat dissipation base 700 a can be metal with high thermal conductivity, and the heat dissipation base 700 a has a plurality of accommodating spaces 710 matching the shape of the battery 200 through mold design. When assembling the battery module 100, the heat dissipation base 700a can be placed in the lower casing 300, such as on the clamping part, and then the battery 200 can be directly placed in the accommodating space 710 of the heat dissipation base 700a, and the battery The 200 is in contact with the heat dissipation base 700a in a large area, so as to increase the heat dissipation efficiency of the battery module 100 and reduce the temperature difference between the batteries 200 . The height of the heat dissipation base 700a is smaller than that of the battery 200 and is located between the clamping parts of the case 300 . Therefore, the heat dissipation base 700a will not contact the electrode sheet 400 , which can avoid the problem of short circuit. In addition, during the spot welding process of connecting the battery 200 and the electrode sheet 400 , the heat dissipation base 700 a can be directly used as a positioning jig for the battery 200 , omitting process steps and reducing costs.

Referring to FIG. 9A and FIG. 9B , they are a top view and a cross-sectional view of an application of the battery module in FIG. 8 , respectively. A plurality of battery modules 100 can be further arranged in series or in parallel in the case 2000 to form a battery array 1000. Details of the arrangement of the battery modules 100 have been described in FIG. 6A and FIG. After the battery modules 100 are arranged, the heat dissipation bases 700a are substantially located in the housing 300 , and the heat dissipation bases 700a in adjacent battery modules 100 will not contact each other.

10 and 11 , wherein FIG. 10 is a disassembled view of another embodiment of the battery module of the present invention, and FIG. 11 is a cross-sectional view of an application of the battery module of FIG. 10 . In this embodiment, the battery module 100 includes a heat dissipation base 700b. The difference between the heat dissipation base 700b and the heat dissipation base 700a is that the heat dissipation base 700b also includes two protrusions 720 located at both ends of the heat dissipation base 700b. The protruding portion 720 protrudes from the outer edge of the battery 200 . The protrusion 720 is located on the short side of the battery module 100, so that when a plurality of battery modules 100 are connected together to form a battery array 1000, as shown in FIG. Outlets 720 are in contact with each other. In some embodiments, the protruding portions 720 on both sides can be in contact with the side surfaces 2004 of the chassis 2000 , so that the chassis 2000 can also serve as one of the heat dissipation paths of the battery array 1000 , thereby further improving the heat dissipation efficiency of the battery array 1000 .

12 and 13 , wherein FIG. 12 is a disassembled view of another embodiment of the battery module of the present invention, and FIG. 13 is a cross-sectional view of an application of the battery module of FIG. 12 . In this embodiment, the battery module 100 includes a heat dissipation base 700c, the difference between the heat dissipation base 700c and the heat dissipation base 700a is that the heat dissipation base 700c includes a plurality of protrusions 720a, 720b located on the side of the heat dissipation base 700c , wherein the protrusions 720a, 720b protrude from the outer edge of the battery 200 . The protruding part 720a is located on the short side of the battery module 100, and the protruding part 720b is located on the long side of the battery module 100, so that when a plurality of battery modules 100 are connected together to form a battery array 1000, as shown in FIG. The heat dissipation bases 700c in the battery module 100 may contact each other through the protrusions 720a. In some embodiments, the protrusions 720a on both sides can be in contact with the side 2004 of the chassis 2000, while the protrusions 720b are in contact with the bottom surface 2002 of the chassis 2000, so that the chassis 2000 can also serve as one of the heat dissipation paths of the battery array 1000 First, the heat dissipation efficiency of the battery array 1000 can be further improved.

Referring to the table below, it is the simulated experimental data of the comparative example and different embodiments of the battery array composed of the battery modules of the present invention.

The comparative example and Experimental Example 1 to Experimental Example 6 are all three-by-eight battery arrays. The battery modules in Experimental Example 1 and Experimental Example 2 are the battery modules shown in Figure 1, and the battery module in Experimental Example 1 is a direct discharge , and the battery module in Experimental Example 2 is placed horizontally; the battery module in Experimental Example 3 is the battery module shown in Figure 7A, and the battery module is placed horizontally; the battery module in Experimental Example 4 is as shown in Figure 8 The battery module shown in Figure 10, and the battery module is placed horizontally; the battery module in Experimental Example 5 is the battery module shown in Figure 10, and the battery module is placed horizontally; the battery module in Experimental Example 6 is as shown in Figure 12 The battery module shown is placed horizontally. The comparative example is similar to the battery module in FIG. 1 , but there is no protrusion on the casing, and the battery module is placed horizontally. The maximum temperature (Tmax) is the maximum temperature of the battery module during the simulation, and the maximum temperature difference (ΔT) is the maximum temperature difference between the batteries during the simulation.

It can be seen from the above table that the heat dissipation effect of placing the battery module horizontally is better than that of standing the battery module upright, and the heat dissipation of the battery module can indeed be improved after the housing is provided with a bump to form the first air flow channel efficiency. After the heat dissipation element and/or the heat dissipation base are added to the battery module, in addition to reducing the maximum operating temperature of the battery module, the temperature difference between the batteries can be reduced.

Although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should depend on the scope defined by the appended claims.

Claims (10)

1. A battery module, comprising: a plurality of cells having opposite ends; Two housings, the two ends of the plurality of batteries are respectively fixed in the two housings, each of the housings includes a plurality of protrusions, and there are a plurality of first air flow channels between the plurality of protrusions ;as well as The two electrode sheets are respectively arranged between the two ends of the plurality of batteries and the two casings. 2. The battery module according to claim 1, wherein the plurality of bumps protrude along the direction of the connection between the two ends of the plurality of batteries, and the plurality of bumps are arranged in an array, and the plurality of bumps The first air passages are arranged along two different directions. 3. The battery module according to claim 1, wherein the plurality of protrusions are hollow structures, each of the protrusions has two openings, and the two openings are arranged face to face to define a plurality of second air passages through the plurality of bumps. 4. The battery module according to claim 3, further comprising a plurality of heat dissipation elements, respectively disposed between the two electrode sheets and the two casings, a part of the plurality of heat dissipation elements is located in the plurality of first Two air channels. 5 . The battery module according to claim 4 , wherein each of the plurality of heat dissipation elements has a plurality of heat dissipation fins, and the plurality of second air channels pass through gaps between the plurality of heat dissipation fins. 6 . The battery module according to claim 1 , wherein the two electrode sheets respectively have a first connection portion and a second connection portion, and the first connection portion is not coplanar with the second connection portion. 7. The battery module as claimed in claim 1, wherein each of the casings comprises a plurality of clamping parts to clamp the plurality of batteries, each of the electrode sheets has a plurality of through holes, and the plurality of The clamping portion passes through the plurality of through holes. 8. The battery module according to claim 7, wherein a height of the plurality of clamping parts is not more than half of a height of the plurality of batteries. 9. The battery module according to claim 1, further comprising a heat dissipation base disposed between the two electrode sheets, the heat dissipation base includes a plurality of accommodating spaces, the plurality of batteries are respectively located in the plurality of In a containing space, and in contact with the heat dissipation base. 10 . The battery module as claimed in claim 9 , wherein the heat dissipation base comprises at least one protruding portion protruding from outer edges of the plurality of batteries. 11 .