TWM633819U - Battery module with heat dissipation structure - Google Patents

Abstract

The invention proposes a battery module, which includes a plurality of battery cells, a battery fixing frame and a heat dissipation structure. The heat dissipation structure includes a plurality of heat containers, at least one heat conducting plate and at least one heat collector. Each thermal capacitor is interposed in a space maintained between a plurality of adjacent battery cells. The heat conducting plate is sandwiched in the gap between the heat capacitor and the battery core. Heat collectors are arranged at both ends of the heat guide plate. When the battery module is in operation, the heat capacitor is used to store the heat generated by the charge and discharge of the surrounding battery cells and conduct the heat to the heat collector through the heat conduction plate. The heat will be collected on the heat collector, and then taken away through the heat dissipation structure The heat generated when the battery cell is charged and discharged will prevent the battery cell from accumulating heat, thereby reducing the risk of battery cell damage.

Description

Battery module with heat dissipation structure

The present invention relates to a battery module, in particular to a battery module with a heat dissipation structure.

In recent years, with the demand for environmental protection and carbon reduction, electric vehicles have gradually been favored by people. Many automakers have entered into the development of electric vehicles one after another in order to seize business opportunities in the electric vehicle market. The power source of electric vehicles is batteries, such as lithium batteries. In order to increase the battery life of the electric vehicle, a battery module with a considerable number of battery cells is usually installed on the electric vehicle to provide enough power for the electric vehicle to use.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which are top sectional views, front sectional views and side sectional views of conventional battery modules. As shown in FIG. 1 , FIG. 2 and FIG. 3 , the battery module 100 includes a metal casing 11 , a plurality of battery cells 12 , a first fixing frame 131 and a second fixing frame 132 . These battery cores 12 will be accommodated and fixed between the first fixing frame 131 and a second fixing frame 132, and the first fixing frame 131 and the second fixing frame 132 of these battery cells 12 will be placed in the metal case In the body 11 , the battery core 12 and the first fixing frame 131 and the second fixing frame 132 are protected by the metal casing 11 .

When the battery core 12 of the battery module 100 is charged and discharged, it will generate heat and heat up. In order to dissipate the heat generated by the charging and discharging of the battery core 12 , usually a blowing fan 151 and an exhausting fan 153 are provided on both sides of the metal casing 11 . The first fixing frame 131 and the second fixing frame 132 containing the battery cells 12 are placed between the blowing fan 151 and the exhausting fan 153 . The blowing fan 151 blows the external cold air toward the location of the battery core 12 inside the housing 11 , and the blown cold air passes through the heated battery core 12 and becomes hot air. Next, the exhaust fan 153 extracts hot air to discharge the hot air to the outside. Then, through the blowing of the blower fan 151 and the extraction of the hot air by the exhaust fan 153, the temperature of the battery core 12 that generates heat during charging and discharging can be cooled.

In the past, these battery cells 12 were horizontally arranged at the same height between the elongated first fixing frame 131 and the second fixing frame 132. Therefore, most of the wind force of the cold air blown by the blowing fan 151 would be blown by the distance from the blowing fan. 151 is blocked by the battery cells 12 in the front row to cause high flow resistance, and only a small amount of wind can flow to the battery cells 12 in the rear row through the gap between the battery cells 12 in the front row. In addition, in order to arrange a large number of battery cells 12 within the limited space of the first fixing frame 131 and the second fixing frame 132, the gaps between the arranged battery cells 12 are usually very small, such as 2mm, which also It will cause a situation of high flow resistance, resulting in very poor air circulation efficiency of the cold air among the battery cells 12 . Therefore, the cold air blown by the blower fan 151 can only flow in places with low flow resistance, for example, the cold air is often blown to the battery cells 12 and the first fixed frame 131 and the second fixed frame near the front row of the blower fan 151 132, the battery cells 12 arranged in the inner area of the battery module 100 are not easy to receive the blowing of cold air, so that the battery cells 12 tend to be at a higher temperature during charging and discharging.

Therefore, in the past, the battery module 100 uses the fans 151 and 153 to blow the battery cells 12 . Due to poor air circulation efficiency, the heat dissipation effect of the battery cells 12 in the inner area of the battery module 100 is not satisfactory.

The purpose of this invention is to provide a battery module, which includes a metal casing, a battery fixing frame, a plurality of battery cells and at least one heat dissipation structure. The battery fixing frame is used for accommodating and fixing the battery core, and is placed in the metal casing. The heat dissipation structure includes a plurality of heat containers, at least one heat conducting plate and at least one heat collector. Each thermal capacitor is interposed in a space maintained between a plurality of adjacent battery cells. The heat conducting plate is sandwiched in the gap between the heat capacitor and the battery core. Heat collectors are provided on both ends of the heat conducting plate and connected to the metal case. When the battery module is in operation, the heat capacitor is used to store the heat generated by the charge and discharge of the surrounding battery cells, and conduct the heat to the heat collector through the heat conduction plate to collect the heat on the heat collector; The heat on the device will be further conducted to the metal shell, and finally, the heat on the metal shell will be taken away by the convection of the outside air. In this way, the heat generated by the charging and discharging of the battery core can be carried away through the heat dissipation structure, which can prevent the battery core from being in a high temperature state during the charging and discharging operation, and reduce the risk of premature damage to the battery core.

In order to achieve the above purpose, this invention provides a battery module, including: a plurality of battery cells; a battery fixing frame for accommodating and fixing a plurality of battery cells; and a heat dissipation structure, including: a plurality of heat capacitors, each The heat capacitor is inserted in the gap between a plurality of adjacent battery cells, and is used to store the heat generated by the charge and discharge of the surrounding battery cells; at least one heat conduction plate is sandwiched between the heat capacitor and the battery core. and at least one heat collector connected to the heat conduction plate, and the heat stored in the heat container is conducted to the heat collector through the heat conduction plate.

In an embodiment of the present invention, the heat conducting plate is a saw-toothed plate body.

In an embodiment of the present invention, the heat conducting plate is made of a planar metal aluminum plate through a stamping or bending process.

In an embodiment of the present invention, the body of the heat conducting plate includes a plurality of recesses, and each heat container is accommodated in a corresponding recess.

In an embodiment of the present invention, the space in the recess of the heat conducting plate is filled by the accommodated heat capacitor.

In an embodiment of the invention, the heat container is a square, rhombus, triangle or circle metal cylinder or metal heat pipe.

In an embodiment of the present invention, the heat collector is arranged on the bent structures at both ends of the heat conducting plate.

In an embodiment of the invention, the heat collector is a metal cylinder or a heat dissipation fin.

In an embodiment of the present invention, the battery module further includes a metal casing, the battery fixing frame and the heat dissipation structure are disposed inside the metal casing, and the heat conducting plate of the heat dissipation structure is connected to the metal casing through a heat collector.

In an embodiment of the present invention, the thermal container is attached to the concave portion of the heat conducting plate through an adhesive, and the heat collector is attached to the bending structures at both ends of the heat conducting plate through an adhesive to form a heat dissipation assembly.

Please refer to FIG. 4 and FIG. 5 , which are respectively a top perspective view of an embodiment of the inventive battery module and a front cross-sectional view of the A-A' line segment of the embodiment of FIG. 4 . As shown in FIGS. 4 and 5 , the battery module 300 of this embodiment includes a metal casing 31 , a plurality of battery cells 32 , a battery fixing frame 33 and at least one heat dissipation structure.

The battery fixing frame 33 includes a first fixing frame 331 and a second fixing frame 332 . The first fixing frame 331 and the second fixing frame 332 respectively include a sleeve (not shown). The upper end of each battery cell 32 is sleeved in the sleeve of the first fixing bracket 331, and the lower end is sleeved in the sleeve of the second fixing bracket 332, so that each battery core 32 can be fixed on the first fixing bracket 331 and the second fixing bracket 331. The distance between the two fixing frames 332 and between the battery cells 32 is maintained. In this embodiment, the battery cells 32 are arranged in a matrix arrangement in the battery fixing frame 33 . Furthermore, the battery fixing frame 33 accommodating and fixing the battery cells 32 will be placed inside the metal casing 31 to protect the battery fixing frame 33 and the battery cells 32 through the metal casing 31 .

Each heat dissipation structure includes a plurality of heat capacitors 351 , a heat conducting plate 353 and at least one heat collector 355 . The heat container 351 can also be a metal cylinder made of aluminum or copper or a metal heat pipe body, and the appearance of its main body can also be made into a square, rhombus, triangle or circle shape. Each thermal capacitor 351 will be interposed in the space maintained between a plurality of adjacent battery cells 32 .

Referring further to FIG. 6 , the heat conducting plate 353 is a sawtooth-shaped plate made from a planar metal aluminum plate 3530 through a stamping process or a bending process. The zigzag heat conducting plate 353 is sandwiched in the gap between the plurality of heat capacitors 351 and the plurality of battery cells 32 . Furthermore, a plurality of recesses 3531 are formed on the saw-toothed heat conducting plate 353 . In this work, the depth of the recess 3531 and its recessed shape will be designed correspondingly in comparison with the appearance of the heat container 351. Then, when the heat container 351 is accommodated in the recess 3531, the part of the heat container 351 The structure will completely fill the space in the recess 3531 so that the thermal capacitor 351 fits tightly on the recess 3531 . In addition, the heat collector 355 can also be an aluminum or copper metal cylinder or a cooling fin, and its main body can also be made into a triangle, square, rhombus or other arbitrary shapes. The heat collector 355 will be disposed on the bent structures 3532 at both ends of the heat conducting plate 353 .

Preferably, the thermal capacitor 351 , the heat conducting plate 353 and the heat collector 355 of the heat dissipation structure can also be assembled into a single heat dissipation element. As shown in Figure 7, in the process of assembly, firstly, each heat container 351 is aligned to the corresponding recess 3531 on the heat conducting plate 353, and each heat collector 355 is aligned to the corresponding position on the two ends of the heat conducting plate 353. After alignment, each heat container 351 and each heat collector 355 are attached to the concave portion 3531 of the heat conducting plate 353 and the bending structures 3532 at both ends through an adhesive (such as heat-conducting glue) respectively. , can be assembled into a single cooling element. The thermal capacitor 351 of the heat dissipation structure, the heat conducting plate 353 and the heat collector 355 are assembled into a single heat dissipation element, which can be arranged in the battery core 32 of the battery module 300 as an integral component, so as to facilitate the installation of the heat dissipation structure. convenience.

Specifically, when the battery module 300 is in operation, each heat capacitor 351 absorbs heat generated by charging and discharging the surrounding battery cells 32 respectively. Next, the heat conducting plate 353 conducts the heat absorbed by each heat container 351 to the heat collector 355 at the two ends of the heat conducting plate 353 with a relatively low temperature, so as to collect the heat in the heat collector 355 . Then, the heat generated by the charging and discharging of the battery core 32 can be carried away through the heat dissipation structure, so as to prevent the battery core 32 from being in a high temperature state during the charging and discharging operation.

In addition, when the heat dissipation structure is disposed in the battery core 32 of the battery module 300 , the heat dissipation structure is connected to the metal casing 31 through the heat collectors 355 disposed at both ends of the heat conducting plate 353 . Then, when the battery module 300 is in operation, the heat collected on the heat collector 355 can be further conducted to the metal casing 31, and then the heat guided to the metal casing 31 can pass through the external air. Convection and carried away. Certainly, in order to increase the effect of heat dissipation, in this creation, also can refer to conventional technology, blow fan (151) and (exhauster fan 153) are respectively set on the both sides of metal shell 31, so that the blowing fan (151) through blowing fan (151) And the draft of collocation (exhaust fan 153), further takes away the heat that metal shell 31 gathers.

Therefore, the heat generated by the charging and discharging of the battery core 32 will be carried away through the heat dissipation structure, and the carried away heat can be dissipated through the metal casing 31 connected to the heat dissipation structure. According to such implementation, the battery core 32 can be prevented from being in a high temperature state during charging and discharging operation, so as to reduce the risk of damage to the battery core 32 .

Furthermore, as shown in Figures 4 and 5, in an embodiment of the present invention, the heat collectors 355 disposed on both ends of the heat conducting plate 353 extend along the horizontal direction of the heat conducting plate 353 and are connected to the metal casing 31 . Alternatively, as shown in FIG. 8 , in another embodiment of the present invention, the heat collectors 355 disposed on both ends of the heat conducting plate 353 extend along the vertical direction of the heat conducting plate 353 and are connected to the metal casing 31 .

The above is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention, that is, any equal changes and changes made according to the shape, structure, characteristics and spirit described in the patent scope of the present application. Modifications should be included in the scope of the patent application for the present model.

100: battery module 11: Metal shell 12: battery cell 131: the first fixed frame 132: the second fixed frame 151: Blowing fan 153: exhaust fan 300: battery module 31: Metal shell 32: battery cell 33: battery holder 331: the first fixed frame 332: the second fixed frame 35: Heat dissipation structure 351: thermal container 353: thermal guide plate 3530: metal aluminum plate 3531: Concave 3532: Bending structure 355: Collector

FIG. 1 is a top sectional view of a conventional battery module.

FIG. 2 is a front sectional view of a conventional battery module.

FIG. 3 is a side sectional view of a conventional battery module.

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

Fig. 5 is the front sectional view of the A-A' line segment of Fig. 4 embodiment.

Fig. 6 is a schematic diagram of the fabrication process of the zigzag heat conduction plate of the invention.

Fig. 7 is a schematic diagram of the assembly of the thermal container, the heat collector and the heat conducting plate of the heat dissipation structure of the present invention.

Fig. 8 is a front sectional view of another embodiment of the battery module of the present invention.

300: battery module

31: Metal shell

32: battery cell

351: thermal container

353: thermal guide plate

355: Collector

Claims (10)

A battery module, comprising: a plurality of battery cells; a battery holder for accommodating and securing a plurality of the battery cells; and A heat dissipation structure, comprising: A plurality of heat capacitors, each heat capacitor is inserted in the space maintained between a plurality of adjacent battery cells, and is used to store the heat generated by charging and discharging the surrounding battery cells; at least one heat conducting plate interposed in the space between the heat capacitors and the battery cells; and At least one heat collector is connected to the heat conduction plate, and the heat stored in the heat containers is conducted to the heat collector through the heat conduction plate. The battery module as claimed in claim 1, wherein the heat conducting plate is a saw-toothed plate. The battery module as claimed in claim 2, wherein the thermal conductive plate is made of a planar metal aluminum plate through a stamping or bending process. The battery module as claimed in claim 2, wherein the body of the heat conducting plate includes a plurality of recesses, and each of the heat capacitors is accommodated in the corresponding recess. The battery module as claimed in claim 4, wherein the space in the concave portion of the heat conducting plate is filled by the received heat capacitor. The battery module as claimed in item 1, wherein the heat capacitors are respectively a square, rhombus, triangle or circle metal cylinder or metal heat pipe body. In the battery module as claimed in claim 4, the heat collector is arranged on the bent structures at both ends of the heat conducting plate. The battery module according to claim 1, wherein the heat collector is a metal cylinder or a heat dissipation fin. The battery module as described in claim 1, wherein the battery module further includes a metal casing, the battery fixing frame and the heat dissipation structure are arranged inside the metal casing, and the heat conducting plate of the heat dissipation structure passes through the metal casing A heater is attached to the metal housing. The battery module as claimed in claim 7, wherein the heat capacitors are attached to the recesses of the heat conducting plate through an adhesive and the heat collectors are attached to both sides of the heat conducting plate through the adhesive Assembled on the bent structure of the end to form a heat dissipation component.

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