WO2018137259A1 - Battery module - Google Patents

Abstract

A battery module (100), comprising a plurality of batteries (200), two casings (300), and two electrode plates (400). The two ends (210, 220) of the battery are respectively secured inside the casings (300), each casing (300) comprising a plurality of protruding blocks (310), and a plurality of air flow channels (P1) being disposed between the protruding blocks (310). The electrode plates (400) are respectively arranged between the two ends (210, 220) of the battery and the shells (300).

Description

Battery module Technical field

The present invention relates to a battery module.

Background technique

Battery modules are typically formed from a large number of batteries in series or in parallel. However, in the process of charging and discharging, the battery often generates a large amount of heat energy. 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 individual batteries is too large or the operating temperature is too high, the power supply performance of the battery module is lowered, the overall service life is shortened, and the risk of spontaneous combustion may be caused.

Therefore, how to improve the heat dissipation efficiency of the battery module without increasing excessive production cost and heat dissipation space becomes an important issue.

Summary of the invention

In order to solve the above problems, an embodiment of the present invention provides a battery module that facilitates mutual engagement and fixation and ensures effective heat dissipation, and includes a plurality of batteries having opposite ends, two housings, and two electrode sheets. Two ends of the battery are respectively fixed in the housing, each housing includes a plurality of bumps, and a plurality of first air flow passages are provided between the bumps. The electrode sheets are respectively disposed between the two ends of the battery and the housing.

In one or more embodiments of the present invention, the bumps protrude in a line direction along both ends of the battery.

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

In one or more embodiments of the present invention, the bumps may be hollow structures, each bump having two openings, the openings being disposed face to face to define a plurality of second air flow passages through the bumps.

In one or more embodiments of the present invention, the heat dissipation module further includes a plurality of heat dissipating components disposed between the electrode pads and the housing, and a portion of the heat dissipating component is located in the second air flow path.

In one or more embodiments of the present invention, each of the heat dissipating members has a heat dissipating fin, and the second air flow path passes through a gap between the heat dissipating fins.

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

In one or more embodiments of the present invention, the housing includes a plurality of clamping portions for holding the battery, and the electrode sheets have a plurality of through holes through which the clamping portions pass.

In one or more embodiments of the invention, the height of the clamping portion is no more than half 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, and the batteries are respectively located in the accommodating space, and the heat dissipation base contact.

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

As described above, in one or more embodiments of the present invention, a bump is provided on the housing via the battery module to form a first air flow path, and the bump may have an opening to form a second air flow path. The design of the first air flow passage and the second air flow passage can improve the heat exchange efficiency of the electrode sheets, thereby improving the heat dissipation efficiency of the battery module. In addition, the battery module can selectively dispose the heat dissipating component in the housing and the bump on the heat dissipating base shell to form the first air flow path, which can greatly improve the heat dissipation efficiency of the battery module. Further improve the heat dissipation efficiency of the battery module.

DRAWINGS

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt;

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

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

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

5A to 5F are respectively schematic views 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 embodiment of application of the battery module of the present invention.

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

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

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

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

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

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

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

Among them, the reference numerals are as follows:

100: battery module

200: Battery

210, 220: end

300, 300a, 300b: housing

310: bump

312: opening

320, 320a, 320b: clamping part

330: Engagement Department

332: hook

334: card slot

336: screw hole

400: electrode sheet

402: Part one

404: Part II

410: through hole

420: First connection

430: second connection

440: conductive structure

500: recess

510: convex part

600: heat dissipation component

610: heat sink fins

700a, 700b, 700c: cooling base

710: accommodating space

720, 720a, 720b: bulging

1000: Battery array

2000: Chassis

2002: bottom surface

2004: Side

2010: Track

2012: baffle

2014: wing board

2020: heat dissipation opening

P1: first air flow path

P2: second air flow path

X, Y, Z: direction

detailed description

The spirit and scope of the present invention will be apparent from the following description of the preferred embodiments of the invention. It is out of the spirit and scope of the invention.

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

The housings 300 are respectively located at 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 housing 300 may be an insulating material to electrically isolate the battery 200 from the external environment. The material of the housing 300 may be a thermoplastic plastic, and the housing 300 may be manufactured by injection molding. The housings 300 on both sides of the battery 200 have substantially the same shape, that is, the two housings 300 can be fabricated by sharing a single mold. If it is necessary to identify the two housings 300, for example, in order to facilitate the distinction between the positive and negative polarities of the battery module 100, the two housings 300 may be made of materials of different colors, and the two housings 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 housing 300, and the electrode sheets 400 respectively contact the two ends 210, 220 of the battery 200. The material of the electrode sheet 400 is a material having a low resistance and high thermal conductivity, such as a metal. The electrode sheet 400 can be formed 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, the electrode sheet 400 can serve as a common electrode of the battery 200 to converge 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 large amount of heat during operation, and the heat is concentrated at the electrodes of the two ends 210, 220 of the battery 200, the heat generated by the operation of the battery module 100 also accumulates on the electrode sheet 400. If the thermal energy cannot be dissipated in real time, the operating temperature of the battery module 100 will be higher and higher, thereby reducing the life of the battery 200. In order to solve the heat dissipation problem, the battery module 100 has a plurality of designs that improve heat dissipation efficiency.

The housing 300 has a plurality of bumps 310 protruding along the connecting direction of the two ends 210, 220 of the battery 200, that is, the extending direction of the bumps 310 is along the long axis direction of the battery 200. Extend outward. There are a plurality of first air flow passages P1 between the bumps 310. The first air flow passages P1 are continuous air flow passages, that is, each of the first air flow passages P1 extends from one side of each housing 300 to another. One side. In some embodiments, the shape of the bump 310 is a moment And the bumps 310 are arranged in an array. Therefore, the first air flow path P1 located between the bumps 310 is also distributed in a lattice shape (or mesh shape), that is, the first air flow path P1 is along two phases. The different directions are arranged, and part of the first air flow path P1 is orthogonal to the other part of the first air flow path P1. In other embodiments, the shape of the bump 310 may be a diamond shape, a circular shape or the like, and the shape of the corresponding first air flow path P1 may also change, but is still continuous.

Since the continuous first air flow path P1 is disposed at a position adjacent to the electrode sheet 400, when the air flows through the first air flow path P1, the heat accumulated at the electrode sheet 400 can be quickly taken away via the heat exchange effect, The heat dissipation efficiency of the battery module 100 is further improved. Also, since the first air flow path P1 extends in two different directions, the flow rate of the air flowing through the first air flow path P1 can be effectively increased.

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

In some embodiments, each of the bumps 310 is provided with two openings 312, and the two openings 312 are respectively located on opposite sides of the bump 310. The openings 312 may be disposed face to face to define the second air flow path P2 through the bumps 310. The opening 312 on each bump 310 can be aligned with the opening 312 on the adjacent bump 310 such that the second air flow path P2 of the adjacent bump 310 is also continuous. In other words, the second air flow path P2 also extends from one side of the respective housings 300 to the other side. Since the second air flow path P2 is continuous and penetrates the bump 310, when the air flows through the second air flow path P2, the air can directly exchange heat with the electrode piece 400 in the casing 300 to further lift the casing 300. Cooling efficiency.

In some embodiments, the material of the housing 300 may be a plastic having a better thermal conductivity. For example, a thermally conductive plastic having a thermal conductivity greater than 2 W/mk may be selected as the material of the housing 300, and the battery 200 in the central region of the battery module 100 may also be used. 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 portions 320 that are disposed on an inner surface of the housing 300 to secure the battery 200 in the housing 300 by the clamping portion 320. The clamping portion 320 may be a columnar structure (such as the clamping portion 320a) or a spring piece (such as the clamping portion 320b), and the clamping portions 320 are spaced apart by a predetermined interval so that the battery can be fixed around the clamping portion 320. Out of the space.

In some embodiments, the height of the clamping portion 320, that is, the distance that the clamping portion 320 extends from the housing 300 is not more than half of the height of the battery, so that after the two housings 300 are engaged with each other, the clips in the two housings 300 are Since the holding portions 320 do not come into contact with each other, there is no problem that the gap between the batteries is blocked by the nip portion 320, resulting in a low heat dissipation efficiency. In other words, The battery 200 is provided with the clamping portion 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 both ends of the battery 200, so that more heat convection can be obtained. area.

Each of the housings 300 has a plurality of engaging portions 330. The height of the engaging portions 330 is greater than the height of the clamping portions 320. The engaging portions 330 of the respective housings 300 have hooks 332 and slots 334. Further, each The engaging portion 330 on the housing 300 forms an engaging structure with the engaging portion 330 on each of the corresponding housings 300, for example, one of the cards on the housing 300 on the left side of the drawing shown in FIG. The engaging portion 330 has a hook 332, and the corresponding engaging portion 330 on the housing 300 on the right side of the drawing has a latching groove 334. By engaging the corresponding hook 332 with the latching slot 334, In turn, the two housings 300 are combined. More specifically, the bottom surface of the housing 300 is rectangular in shape, 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, and the card slots 334 are disposed at the other two opposite corners of the housing. In other embodiments, the two hooks 332 may be disposed on the long side or the short side of the housing 300, and the two card slots 334 are disposed on the other long side or the other short side. The engaging portion 330 can be further provided with a plurality of screw holes 336. After the two housings 300 are engaged with each other through the engaging structure, the screws can be further locked to the screw holes 336 to lock the two housings 300.

Referring to Fig. 4, there is shown a perspective view of an embodiment of an electrode sheet of a battery module of the present invention. The electrode sheet 400 has a plurality of through holes 410. The through holes 410 can be formed by stamping a metal plate, and the through holes 410 can pass through the clamping portion 320 in FIG. In some embodiments, the shape of the through hole 410 and the shape of the clamping portion 320 are matched to each other such that the inner edge of the through hole 410 is in contact with the clamping portion 320 to thereby 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 being substantially perpendicular to the long axis direction of the battery 200. The area of the first portion 402 is greater than the area 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 connecting portion 420 and a second connecting portion 430. The first connecting portion 420 and the second connecting portion 430 are respectively located at the first portion 402 and the second portion 404. The first connecting portion 420 and the second connecting portion 430 function to contact the electrode sheet 400 with the outside. Therefore, the first connecting portion 420 and the second connecting portion 430 are respectively disposed on different planes, such as the first portion that is perpendicular to each other. 402 and the second portion 404 will help to increase the flexibility of the battery module wiring.

5A to 5F are respectively schematic views of different stages of assembly of an embodiment of the battery module of the present invention. 5A is a case in which a housing 300a is provided and a battery 200 is placed in the housing 300a, and the battery 200 can be positioned by being clamped by a clamping portion 320 (see FIG. 3) on the housing 300a, in other words, the battery 200 is housed in a clip. The battery 200 is positioned in contact with the clamping portion 320 in the space between the holding portions 320.

During assembly of the battery 200, the battery 200 can be positioned directly within the housing 300a without the need for additional The fixture has a fixed battery 200. In addition to this, the housing 300a of the plastic material can directly serve as an insulating material and protect the battery 200 therein.

Next, in FIG. 5B, the spot welding process is used, 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 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 connecting portion 420 and the second connecting portion 430 of the electrode sheet 400. In some embodiments, the conductive structure 440 can be a nut and is fixed to the first connecting portion 420 and the second connecting portion 430 by spot welding.

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

Then, the housings 300a, 300b are turned over, and the upper housing 300a is removed, as shown in FIG. 5D, to mount the other electrode sheet 400 at the other end of the battery 200. The electrode sheet 400 can also be fixed on the other side of the battery 200 by a spot welding process, so that the electrodes at the end of the battery 200 are in contact with the electrode sheet 400, and the electrode sheet 400 is used as a common negative electrode of the battery 200 or a common positive electrode.

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

Then, as shown in FIG. 5E, the casing 300a is returned to the other end of the battery 200. As described above, since the clamping portion 320 (refer to FIG. 3) is partially in 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 holding portion of the electrode sheet 400 can be avoided. The 320 is divided to maintain the continuity of the electrode sheet 400.

When the housings 300a and 300b are mounted, the two housings 300a and 300b can be coupled and fixed by engaging the hooks 332 with the slots 334. Then, the screw 340 is locked in the screw hole 336 on the housing 300 to lock the two housings 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 housings 300a, 300b to facilitate connection of the battery module 100 with an external circuit. The conductive structure 440 located 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 the different surfaces of the housings 300a, 300b, such as respectively located in the shell. The top surface and the side surface of the body 300a, 300b, therefore, each electrode sheet 400 (see FIG. 4) will be electrically connected from two directions (ie, the top surface and the side surface), effectively improving the flexibility of the connection of the battery module 100.

6A and 6B are respectively a perspective view and a side view of an embodiment of application of the battery module of the present invention. The plurality of battery modules 100 may be further connected in series or in parallel to constitute the battery array 1000. As described above, since the two housings 300 in each of the battery modules 100 can be respectively made of plastic materials of different colors, When the battery module 100 is connected, the positive and negative polarities of the battery module 100 can be easily distinguished, and it is convenient to perform series or parallel connection.

In order to facilitate the splicing of the battery module 100 into the battery array 1000, the housing 300 of the battery module 100 has a plurality of recesses 500 and protrusions 510 (see FIG. 5F at the same time), and the recesses 500 and 510 are distributed on the side of the housing 300. The concave portion 500 and the convex portion 510 are substantially elongated, and the longitudinal direction of the concave portion 500 and the convex portion 510 is parallel to the longitudinal direction of the battery 200. The adjacent two battery modules 100 can be positioned by the mutual engagement between the concave portion 500 and the convex portion 510 of the adjacent two battery modules 100. For example, the battery module 100 in this embodiment is placed laterally in the chassis 2000, and the concave portion 500 and the convex portion 510 of the adjacent two battery modules 100 in the long axis direction (ie, the X direction in the drawing) are mutually The battery modules 100 can be connected in series along the X direction by engaging the face-to-face recesses 500 and the protrusions 510. In other embodiments, the battery module 100 can be placed directly in the chassis 2000, or the battery module 100 can be connected in series along the Z direction, and details are not described herein again.

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

The track 2010 can include a baffle 2012 and a wing panel 2014 extending outwardly from the baffle 2012, wherein the baffle 2012 is erected to the bottom surface 2002 of the chassis 2000, and the wing 2014 is parallel to the bottom surface 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 bump 310 such that the flap 2014 is located in the first air flow path P1. In this way, the baffle 2012 can be used to position the battery module 100 in the Y direction, and the flap 2014 can position the battery module 100 in the Z direction.

A plurality of heat dissipation openings 2020 may be further disposed on the chassis 2000. The heat dissipation openings 2020 are distributed on the bottom surface 2002 and the side surfaces 2004 of the chassis 2000 to allow air to enter the chassis 2000 from the heat dissipation opening 2020 to exchange heat with the battery module 100. In some embodiments, the heat dissipation opening 2020 is parallel to the direction of the portion of the first air flow path P1, and at least a portion of the heat dissipation opening 2020 is positioned between the adjacent bumps 310 such that air enters from the heat dissipation opening 2020. After the chassis 2000, the battery module 100 can be dissipated through the first air flow path P1.

It can be known from the above embodiment that the battery module can increase the heat dissipation efficiency of the battery module by using the first air flow path between the bumps. The housing of the battery module can be directly used as a fixture for positioning the battery at the time of assembly, thereby saving the assembly process and the cost of the device. In addition, since the electrode sheets can be connected to external circuits from the top and side of the battery module, the flexibility of the battery module application is also improved. In the following embodiments, the features of how to further improve the heat dissipation efficiency of the battery module will be described, and the same portions as the foregoing embodiments will not be described again.

7A and 7B are respectively a disassembled view and a side view of another embodiment of the battery module of the present invention. In the embodiment, the battery module 100 further includes a plurality of heat dissipating components 600 disposed between the electrode pads 400 and the housing 300. The heat dissipating member 600 may be fixed on the electrode sheet 400 by a thermal conductive paste or solder and physically contact with the electrode sheet 400 to dissipate heat accumulated by the electrode sheet 400 via the heat dissipating member 600.

In some embodiments, the heat dissipating component 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 dissipating components 600, so that the clamping portion on the housing 300 can pass between the heat dissipating components 600. And through the through hole 410. The heat dissipating component 600 includes a plurality of heat dissipating fins 610 to increase the heat exchange area of the heat dissipating component 600 with the air. The material of the heat dissipating member 600 is a metal having high thermal conductivity such as copper or aluminum. After the battery module 100 is assembled, the heat dissipating component 600 may be partially exposed to the opening 312 on the bump 310 to allow air to enter the housing 300 via the opening 312 for heat exchange with the heat dissipating component 600.

In some embodiments, the heat dissipating component 600 is disposed to fit the bump 310 on the housing 300, that is, the long axis direction of the heat dissipating component 600 is parallel to the long axis direction of the bump 310, and the heat dissipating fins on the heat dissipating component 600 610 are distributed in groups in the hollow bumps 310. The arrangement direction of the heat dissipation fins 610 is substantially parallel to the connection direction of the openings 312, so that the gap between the heat dissipation fins 610 is also parallel to the direction of the second air flow path P2, so that the second air flow path P2 passes through the heat dissipation fins. The gap between 610.

By providing the heat dissipating member 600 in contact with the electrode sheet 400, the heat accumulated by the electrode sheet 400 can be dissipated via the heat dissipating member 600, and since the second air flow path P2 in the casing 300 passes through the gap between the heat dissipating fins 610, 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 Figure 8, there is shown a disassembled 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 housings 300, and the battery 200 is positioned in the heat dissipation base 700a. The material of the heat dissipation base 700a may be a metal having high thermal conductivity, and the heat dissipation base 700a has a plurality of accommodation spaces 710 matching the shape of the battery 200 by a mold design. When the battery module 100 is assembled, the heat dissipation base 700a can be placed in the lower housing 300, such as on the clamping portion, and the battery 200 can be placed directly in the receiving space 710 of the heat dissipation base 700a, and the battery is The 200 is in contact with the heat dissipation base 700a over a large area, thereby increasing the heat dissipation efficiency of the battery module 100 and reducing the temperature difference between the batteries 200. The height of the heat dissipation base 700a is smaller than the height of the battery 200 and is located between the clamping portions of the housing 300. Therefore, the heat dissipation base 700a does not come into contact with the electrode sheets 400, and the problem of short circuit can be avoided. In addition, in the spot welding process of connecting the battery 200 and the electrode sheet 400, the heat dissipation base 700a can be directly used as the positioning jig of the battery 200, omitting the process steps and reducing the cost.

9A and 9B, which are top and cross-sectional views, respectively, of an application of the battery module of FIG. The plurality of battery modules 100 may be further arranged in series or in parallel in the chassis 2000 to become the battery array 1000, and the battery module 100 The details of the arrangement have been described in FIGS. 6A and 6B, and therefore will not be described again. After the battery modules 100 are arranged, the heat dissipation bases 700a are substantially located within the housing 300, and the heat dissipation bases 700a in the adjacent battery modules 100 are not in contact with each other.

10 and FIG. 11, FIG. 10 is a disassembled view of still 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. 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 700b is that the heat dissipation base 700b further includes two protrusions 720 located at two ends of the heat dissipation base 700b. The protrusion 720 protrudes from the outer edge of the battery 200. The protruding portion 720 is located on the short side of the battery module 100, so that when the plurality of battery modules 100 are connected together to form the battery array 1000, as shown in FIG. 11, the heat dissipation base 700b in the adjacent battery module 100 can pass through the convex The outlets 720 are in contact with each other. In some embodiments, the most lateral projections 720 can be in contact with the side surface 2004 of the chassis 2000, so that the chassis 2000 also serves as one of the heat dissipation paths of the battery array 1000, and the heat dissipation efficiency of the battery array 1000 can be further improved.

12 and FIG. 13, FIG. 12 is a disassembled view of still 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. 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 protruding portions 720a and 720b on the side of the heat dissipation base 700c. Where the projections 720a, 720b protrude from the outer edge of the battery 200. The protrusion 720a is located on the short side of the battery module 100, and the protrusion 720b is located on the long side of the battery module 100, so that when the plurality of battery modules 100 are connected together to form the battery array 1000, as shown in FIG. The heat dissipation bases 700c in the battery module 100 may be in contact with each other through the projections 720a. In some embodiments, the most lateral projections 720a can be in contact with the side surface 2004 of the chassis 2000, and the projections 720b are in contact with the bottom surface 2002 of the chassis 2000, so that the chassis 2000 also serves as a heat dissipation path for the battery array 1000. First, the heat dissipation efficiency of the battery array 1000 can be further improved.

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

The comparative example and the experimental example 1 to the experimental example 6 are all three-by-eight battery arrays. The battery modules in the experimental example 1 and the experimental example 2 are the battery modules shown in FIG. 1 , wherein the battery modules in the experimental example 1 are directly placed. The battery module in the experimental example 2 is horizontally placed; the battery module in the experimental example 3 is a battery module as shown in FIG. 7A, and the battery module is horizontally placed; the battery module in the experimental example 4 is as shown in FIG. The battery module is shown, and the battery module is horizontally placed; the battery module in the experimental example 5 is a battery module as shown in FIG. 10, and the battery module is horizontally placed; the battery module in the experimental example 6 is as shown in FIG. The battery module shown, and the battery module is placed horizontally. The comparative example is similar to the battery module of Fig. 1, but the housing has no bumps and the battery modules are horizontally placed. 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 known from the above table that the heat dissipation effect of the battery module being horizontally placed is better than the heat dissipation effect of the battery module being erected, and the bumps are formed on the casing to form the first air flow passage, which can actually improve the heat dissipation of the battery module. effectiveness. When the heat dissipating component and/or the heat sink base are added to the battery module, in addition to lowering the maximum operating temperature of the battery module, the temperature difference between the batteries can be further reduced.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, and thus the present invention The scope of protection is subject to the scope defined by the appended claims.

Claims (10)

A battery module comprising: a plurality of batteries having opposite ends; Two shells, two ends of the plurality of batteries are respectively fixed in the two shells, each of the shells comprises a plurality of bumps, and a plurality of first air flow passages are arranged between the plurality of bumps ;as well as Two electrode sheets are respectively disposed between the two ends of the plurality of batteries and the two housings. The battery module according to claim 1, wherein the plurality of bumps are protruded along a wiring direction of both ends of the plurality of batteries, and the plurality of bumps are arranged in an array, the plurality of An air flow path is arranged in two different directions. The battery module according to claim 1, wherein said plurality of bumps are hollow structures, each of said bumps has two openings, said two openings being disposed face to face to define a plurality of second air flow passage passages A plurality of bumps are described. The battery module according to claim 3, further comprising a plurality of heat dissipating members respectively disposed between the two electrode sheets and the two housings, a part of the plurality of heat dissipating members being located in the plurality of second air In the flow path. The battery module according to claim 4, wherein each of said heat dissipating members has a plurality of fins, and said plurality of second air passages pass through a gap between said plurality of fins. The battery module according to claim 1, wherein the two electrode sheets respectively have a first connecting portion and a second connecting portion, and the first connecting portion is not coplanar with the second connecting portion. The battery module according to claim 1, wherein each of said housings includes a plurality of holding portions for holding said plurality of batteries, each of said electrode sheets having a plurality of through holes, said plurality of holdings Passing through the plurality of through holes. The battery module according to claim 7, wherein a height of said plurality of grip portions is not more than a half of a height of said plurality of batteries. The battery module of claim 1 , further comprising a heat dissipation base disposed between the two electrode sheets, the heat dissipation base comprising a plurality of accommodating spaces, wherein the plurality of batteries are respectively located in the plurality of capacitors Placed in the space and in contact with the heat sink base. The battery module according to claim 9, wherein the heat dissipation base includes at least one projection that protrudes from an outer edge of the plurality of batteries.

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