TWM634466U - Battery module with heat conduction structure - Google Patents

Abstract

This creation proposes a battery module, which includes a plurality of battery cells, a battery fixing frame and a plurality of heat conductors; the battery fixing frame is used to accommodate and fix the battery cores; each heat conductor is respectively inserted in a plurality of corresponding adjacent In the interval kept between the battery cells; and, at least one end of each heat conductor passes through the battery holder vertically and is connected to a heat collector; the heat generated by charging and discharging the battery core around the heat conductor will be able to pass through the heat conduction The body conducts to the heat collector to avoid the heat generated by the charging and discharging of the battery core from accumulating on the battery core.

Description

Battery module with heat conduction structure

The present invention relates to a battery module, in particular to a battery module which uses a heat conduction structure to conduct the heat generated by charging and discharging the battery core and collects the heat.

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 casing 11 , a plurality of battery cells 12 , a first fixing frame 131 and a second fixing frame 132 . These battery cells 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 for arranging these battery cells 12 will be placed in the housing In FIG. 11 , the battery core 12 and the first fixing frame 131 and the second fixing frame 132 are protected by the 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 respectively provided on two sides of the housing 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 casing 11 , and the blown cold air passes through the heated battery core 12 and becomes hot air. Next, draw The fan 153 extracts hot air to discharge the hot air to the outside. Then, through the blowing of the blowing 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 circulation efficiency of the cold air between 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 121 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.

For example, as shown in FIG. 1 , when the battery module 100 is in operation, a temperature detector is used to detect the temperatures of four battery cells (A, B, C, D) 12 at different positions. Through temperature detection, the temperature of the battery core (A) 12 can also be T1, the temperature of the battery core (B) 12 can also be T2, the temperature of the battery core (C) 12 can also be T3, and the battery core (D) The temperature of 12 can also be T4. The temperature of the four battery cells 12 can also be T4>T3>T2>T1. Then, the temperature of the battery cells (D) 12 in the rear row farther from the blower fan 151 will be higher than those of the battery cells (A, B, C) 12 in the front row. In addition, since the cold air flows in from the blowing fan 151 , the cold air will exchange heat with each passing battery cell 12 . The air received by the battery core 12 at the rear end of the wind direction is the air that has been heat-exchanged by the battery core 12 at the front end. therefore, The temperature of each battery cell 12 inside the entire battery module 100 presents a higher and higher temperature gradient according to the distance from the blower fan 151, so that the aging speed of the battery cells 12 at the rear end of the wind direction is much faster than that of the battery cells at the front end of the wind direction. The core 12 is even faster, which leads to a relatively shortened service life of the battery module 100 .

One purpose of the present invention is to provide a battery module, which includes a casing, a battery fixing frame, a plurality of battery cells and a heat conduction structure. One side of the casing is provided with an air outlet and the other side is provided with an air outlet. The battery fixing frame is arranged between the air outlet and the air outlet of the casing and is used for accommodating and fixing a plurality of battery cells. The heat conduction structure includes a plurality of heat conductors and a heat collector. Each heat conductor is respectively inserted in the space maintained between a plurality of corresponding adjacent battery cores, and at least one end of each heat conductor vertically passes through the battery fixing frame and is connected to a heat collector. When the battery module is in operation, each heat conductor absorbs the heat generated by the charging and discharging of the surrounding battery cores respectively, and transmits the heat to the casing respectively, so as to collect the heat on the casing, so that it will be possible to avoid the heat generated by the charging and discharging of the battery core. in a higher temperature state.

Another purpose of the invention is to provide a battery module, wherein the heat collector is a metal block with a large area. When the heat conductor transports heat to the rear side or the middle section of the metal block, the heat is conducted to the front side of the metal block with a lower temperature through the large-area metal block with a large thermal conductivity characteristic, resulting in In order to achieve long-distance heat exchange effect.

Another object of the present invention is to provide a battery module, wherein the heat conduction structure further includes at least one heat pipe. The heated end of each heat pipe is connected to the corresponding metal block, and the cooling end is arranged at a position closer to the air outlet or connected to a cooling fin. When the battery module is in operation, the heat generated by charging and discharging the battery core will be transported to the metal block by the heat conductor and collected on the metal block. Afterwards, a working fluid inside the heated end of the heat pipe absorbs the heat collected on the metal block and produces a phase change. The heat is quickly transported to the condensing end in the form of steam flow. After the condensing end of the heat pipe receives heat, it can dissipate the heat received by the condensing end of the heat pipe through the cooling fins. Through the setting of the heat pipe, the heat generated by the charging and discharging of the battery cells collected on the metal block can be quickly transported to the cold side to speed up the speed of long-distance heat exchange.

In order to achieve the above purpose, the invention provides a battery module with a heat conduction structure, including: a plurality of battery cells; a battery fixing frame for accommodating and fixing a plurality of battery cells; and a plurality of heat conductors, each of which is separately Interposed in the intervals maintained between a plurality of corresponding adjacent battery cells, at least one end of each heat conductor vertically passes through the battery fixing frame and is connected to a heat collector.

In one embodiment of the present invention, the battery module further includes a metal shell, one side of the metal shell is provided with an air outlet and the other side is provided with an air outlet, and the battery fixing frame is arranged between the air outlet and the air outlet. The heater is a metal shell.

In an embodiment of the present invention, the heat conductor is an aluminum metal column, a copper metal column or a heat pipe.

In an embodiment of the invention, one end of each heat conductor is provided with a flat portion, and each heat conductor is connected to the heat collector through the flat portion, and the flat portion faces the air outlet with a narrow side.

In an embodiment of the invention, the heat conductor is a circular, triangular or square metal cylinder.

In an embodiment of the invention, the heat collector is a metal block.

In an embodiment of the invention, a plurality of cooling fins are arranged on the surface of the metal block.

In an embodiment of the present invention, at least one heat pipe is further included, one end of the heat pipe is connected to the heat collector, and the other end is arranged at a position closer to the air outlet.

In an embodiment of the present invention, a cooling fin is further included, and the other end of the heat pipe is connected to the cooling fin.

In an embodiment of the present invention, the cooling fins are arranged beside the air outlet.

100: battery module

11: Housing

12: battery cell

131: the first fixed frame

132: the second fixed frame

151: Blowing fan

153: exhaust fan

300: battery module

301: battery module

302: battery module

303: battery module

304: battery module

31: shell

32: battery cell

33: battery holder

331: the first fixed frame

332: the second fixed frame

34: heat conductor

351: Blowing device

353: ventilation device

36: heat conductor

361: flat part

37: Conductive frame

38: cooling fins

39: metal block

391: cooling fins

392: heat pipe

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

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

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

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

Fig. 5 is a front sectional view of an embodiment of the battery system of the present invention.

Fig. 6 is a top perspective view of another embodiment of the battery system of the present invention.

Fig. 7 is a front sectional view of another embodiment of the battery system of the present invention.

FIG. 8 is a top perspective view of another embodiment of the battery system of the present invention.

Fig. 9 is a front sectional view of another embodiment of the battery system of the present invention.

10A to 10E are respectively a top view, a bottom view, a right view, a left view and a front view of a heat conductor according to an embodiment of the present invention.

FIG. 11 is a top perspective view of yet another embodiment of the battery system of the present invention.

Fig. 12 is a front sectional view of another embodiment of the battery system of the present invention.

Fig. 13 is a front sectional view of another embodiment of the battery system of the present invention.

FIG. 14 is a top perspective view of yet another embodiment of the battery system of the present invention.

Fig. 15 is a front sectional view of another embodiment of the battery system of the present invention.

Please refer to FIG. 4 and FIG. 5 , which are respectively a top perspective view and a front sectional view of an embodiment of the inventive battery module. As shown in FIG. 4 and FIG. 5 , the battery module 300 of this embodiment includes a casing 31 , a plurality of battery cells 32 and a battery fixing frame 33 . The shell 31 is a metal shell, one side of which is provided with a blowing device 351 with a blowing port, and the other side is provided with a drafting device 353 with a venting port. During charging and discharging of the battery module 300 , cold air enters the interior of the casing 31 from the air outlet of the air blowing device 351 , and hot air is drawn out from the air outlet of the air exhausting device 353 .

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 .

The battery module 300 of the present invention further includes a plurality of heat conductors 34 . Each heat conductor 34 is respectively inserted in the intervals maintained between a plurality of corresponding adjacent battery cells 32 . The heat conductor 34 can also be a metal post made of aluminum, a metal post made of copper, a heat pipe or a conductor with better thermal conductivity. Moreover, the battery core 32 farther away from the air outlet is often in a state of higher temperature during charging and discharging. Therefore, each heat conductor 34 can also be selected to be arranged on the inner side of the battery holder 33 and farther away from the air outlet. In the interval maintained between adjacent battery cells 32. One end of the heat conductor 34 is connected to the casing 31 through the first fixing frame 331 of the battery fixing frame 33 , and the other end is connected to the casing 31 through the second fixing frame 332 of the battery fixing frame 33 .

In this embodiment, the casing 31 will serve as a heat collector. When the battery module 300 is in operation, each heat conductor 34 respectively absorbs the heat generated by the charging and discharging of the surrounding battery cells 32, and transmits the heat respectively. sent to the shell 31 so that the heat can be collected on the shell 31. Subsequently, the air blowing through the blowing device 351 and the exhausting air combined with the exhausting device 353 are used to take away the heat collected on the casing 31 . Then, through the heat conduction of the heat conductor 34 , the heat generated by the charging and discharging of the battery core 32 is transported to the casing 31 and collected on the casing 31 , which can prevent the battery core 32 from being in a high temperature state during the charging and discharging operation.

Please refer to FIG. 6 and FIG. 7 , which are respectively a top perspective view and a front sectional view of another embodiment of the inventive battery module. As shown in FIG. 6 and FIG. 7 , in the battery fixing frame 33 of the battery module 301 of the present embodiment, the battery cells 32 are arranged in parallel, and the battery cells 32 in two adjacent rows are arranged alternately.

The battery module 301 further includes a plurality of conductive frames 37 . The battery cells 32 are connected in series and parallel through the conductive frame 37 . A part of the conductive frame 37 is arranged in the inner space of the first fixing frame 331 to electrically connect the upper electrodes (positive or negative electrodes) of two adjacent battery cells 32 together, and another part of the conductive frame 37 is arranged in the second fixed frame 331. The inner space of the fixing frame 332 is used to electrically connect the lower electrodes (negative or positive electrodes) of two adjacent battery cells 32 together.

Similarly, the battery module 301 of this embodiment also has a plurality of heat conductors 36 . Each heat conductor 36 is respectively disposed in the space between a plurality of adjacent battery cells 32 located inside the battery holder 33 and far from the air outlet. Furthermore, the conductive frame 37 spans between two adjacent battery cells 32, therefore, one end of the heat conductor 36 disposed in the gap between the battery cells 32 will be blocked by the conductive frame 37 and cannot be connected to the casing 31. . For example: the upper end of the heat conductor 36 is blocked by the conductive frame 37 in the first fixed mount 331 and is not connected to the housing 31, while the lower end passes through the second fixed mount 332 and is connected to the housing 31; or, the lower end of the heat conductor 36 is It will be blocked by the conductive frame 37 in the second fixing bracket 332 and not connected to the housing 31 , while the upper end will pass through the first fixing bracket 331 and be connected to the housing 31 . In addition, in this creation, the heat conductor 36 can also be based on The appearance shape is determined by the closeness between the heat conductor 36 and the surrounding battery cores 32 , for example, the heat conductor 36 is designed as a triangular, circular or square metal cylinder.

Please refer to Fig. 8, Fig. 9 and Fig. 10A to Fig. 10D, which are respectively a top perspective view and a front sectional view of another embodiment of the battery module of the invention, and a top view, a bottom view, a right side view, Left and front view. As shown in FIGS. 8 , 9 and 10A to 10D , in the battery module 302 of this embodiment, the heat conductor 36 is provided with a flat portion 361 at one end thereof. The flat portion 361 is a component formed by extruding one end of the heat conductor 36 to become wider and thinner. One end of each heat conductor 36 is connected to the housing 31 (or called the heat collector) through the flat portion 361 , and when specifically arranged, the narrow side of the flat portion 361 faces the air outlet.

The function of the flat portion 361 is like a heat dissipation fin, which can increase the heat exchange area between the heat conductor 36 and the air, so as to improve the efficiency of heat exchange. In addition, the narrow side of the flat portion 361 faces the air outlet, which can reduce the wind resistance, so as to avoid affecting the heat exchange of other heat conductors 36 at the rear.

Please refer to FIG. 11 and FIG. 12 , which are respectively a top perspective view and a front sectional view of another embodiment of the inventive battery module. Compared with the battery module 300 of the above embodiment, as shown in FIG. 11 and FIG. 12 , the battery module 303 of this embodiment further includes at least one metal block 39 with better thermal conductivity, such as a copper block or an aluminum block. The metal block 39 is disposed on the upper surface and/or the lower surface of the inner edge of the casing 31 . Both ends of the heat conductor 34 are respectively connected to corresponding metal blocks 39 . Furthermore, the heat conductor 34 can also be designed as a circular, triangular or square metal cylinder. In this embodiment, the metal block 39 is used as a heat collector. The heat generated by charging and discharging the battery core 32 will be transported to the metal block 39 by the heat conductor 34 and collected on the metal block 39 , so as to prevent the battery core 32 from accumulating heat generated by charging and discharging.

The large-area metal block 39 can also be used as a heat sink, which has a relatively large thermal conductivity. Then, the heat gathered on the middle section and the rear side of the metal block 39 can be conducted to the front side of the metal block 39 with a lower temperature (such as the cold side close to the air outlet), so as to achieve long-distance heat exchange.

Alternatively, as shown in FIG. 13 , a plurality of heat dissipation fins 391 are further provided on the surface of the metal block 39 to increase the heat exchange area of the metal block 39 to improve the heat dissipation effect of the metal block 39 .

Please refer to FIG. 14 and FIG. 15 , which are respectively a top perspective view and a front sectional view of another embodiment of the inventive battery module. Compared with the battery module 300 of the above-mentioned embodiment, as shown in FIG. 14 and FIG. 15 , the battery module 304 of this embodiment further includes one or more metal blocks 39 . Each metal block 39 corresponds to a specific area, and the two ends of the heat conductor 34 inserted in the gaps of the battery cells 32 in the specific area are respectively connected to the corresponding metal block 39 .

Furthermore, the battery module 304 further includes one or more heat pipes 392 . One end (such as the heating end) of each heat pipe 392 is connected to the corresponding metal block 39 , and the other end (such as the cooling end) is located near the air outlet or connected to a cooling fin 38 . The heat dissipation fins 38 can also be arranged at a position with better air convection, for example, the heat dissipation fins 38 are arranged beside the blowing outlet of the blowing device 351 .

When the battery module 304 is in operation, the heat generated by charging and discharging the battery cells 32 in a specific area will be transported to the corresponding metal block 39 by the heat conductor 34 and collected on the corresponding metal block 39 . Afterwards, a working fluid inside the heated end of the heat pipe 392 absorbs the heat collected on the metal block 39 and undergoes a phase change to rapidly transport the heat to the condensing end in the form of steam flow. After the condensing end of the heat pipe 392 receives heat, it can dissipate the heat received by the condensing end of the heat pipe 392 through the cooling fins 38 .

Here, the heat generated by the charging and discharging of the battery cells 32 in the specific area collected on each metal block 39 can be quickly transported to the cold side (such as the position of the heat dissipation fins 38 ) through the heat pipe 392 to speed up the long-distance transmission. The speed of heat exchange improves the heat dissipation efficiency of the battery module 304 during operation.

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.

300: battery module

31: Shell

32: battery cell

33: battery holder

331: the first fixed frame

332: the second fixed frame

34: heat conductor

351: Blowing device

353: ventilation device

Claims (10)

A battery module with a heat conduction structure, comprising: a plurality of battery cores; a battery fixing frame for accommodating and fixing the plurality of battery cores; and a plurality of heat conductors, each of which is respectively inserted in a plurality of corresponding At least one end of each of the heat conductors vertically passes through the battery fixing frame and is connected to a heat collector in the interval maintained between the adjacent battery cells. The battery module as described in Claim 1, wherein the battery module further includes a metal casing, one side of the metal casing is provided with an air outlet and the other side is provided with an air outlet, and the battery fixing frame is arranged on Between the air outlet and the air outlet, the heat collector is the metal shell. The battery module as claimed in claim 1, wherein the heat conductor is an aluminum metal post, a copper metal post or a heat pipe. The battery module according to claim 2, wherein one end of each heat conductor is provided with a flat portion, each heat conductor connects to the heat collector through the flat portion, and the flat portion faces the air outlet with a narrow side. The battery module as claimed in claim 1, wherein the heat conductor is a circular, triangular or square metal cylinder. The battery module as claimed in claim 1, wherein the heat collector is a metal block. The battery module as claimed in claim 6, wherein a plurality of cooling fins are arranged on the surface of the metal block. The battery module as claimed in Claim 2 further includes at least one heat pipe, one end of the heat pipe is connected to the heat collector, and the other end is arranged at a position nearer to the air outlet. The battery module as claimed in claim 8 further includes a heat dissipation fin, and the other end of the heat pipe is connected to the heat dissipation fin. The battery module as claimed in item 9, wherein the cooling fins are arranged beside the air outlet.

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