TWI831486B - Battery equipment for improving heat dissipation - Google Patents

Abstract

The invention provides a battery equipment for improving heat dissipation, which includes a plurality of battery cells, a plurality of upper cooling plates and a plurality of lower cooling plates. The upper cooling plates are parallel to each other, and an upper cooling channel is formed between two adjacent upper cooling plates. The lower cooling plates are parallel to each other, and a lower cooling channel is formed between two adjacent lower cooling plates. The upper cooling plates and the lower cooling plates are stacked, wherein the upper cooling plates and the lower cooling plates are not parallel to each other. The battery cell is arranged in the upper cooling channel and the lower cooling channel, wherein one side of the battery cell is located in the upper cooling channel, and the other side of the battery cell is located in the lower cooling channel. The upper cooling channel and the lower cooling channel are used to guide the cooling airflow to contact the battery cells and reduce the temperature of the battery cells.

Description

Battery equipment that improves heat dissipation

The present invention provides a battery device that can improve the heat dissipation effect, guide the cooling air flow to the battery core, and reduce the temperature of the battery core.

Secondary batteries mainly include nickel metal hydride batteries, nickel cadmium batteries, lithium ion batteries, and lithium polymer batteries. Lithium ion batteries have high energy density, high operating voltage, wide operating temperature range, no memory effect, long life, and can be recharged multiple times. It has the advantages of discharge and other advantages, and is widely used in portable electronic products such as mobile phones, notebook computers, digital cameras, etc. In recent years, it has also expanded to the automotive field.

The structure of the cell (Cell) of a lithium-ion battery mainly includes positive electrode material, electrolyte, negative electrode material, isolation layer and casing. The isolation film separates the positive electrode material and negative electrode material to avoid short circuit, while the electrolyte is placed in multiple pores in the isolation membrane and work as conductors of ionic charges. The casing is used to cover the above-mentioned positive electrode material, isolation film, electrolyte and negative electrode material. Generally speaking, the casing is usually made of metal material.

The optimal operating temperature of lithium-ion batteries is about 15°C to 35°C. Working temperatures that are too low or too high may affect the normal use of lithium-ion batteries. Specifically, when the temperature is too low, the internal resistance of the lithium-ion battery will increase and the discharge capacity will decrease. In severe cases, it may cause the voltage generated by the lithium-ion battery to be unable to drive electronic devices or cars. When the temperature is too high, the service life of the lithium-ion battery may be reduced, and it may even cause the lithium-ion battery to undergo thermal runaway (Thermal Runway), thereby generating flames and emitting high-heat flammable substances.

One object of the present invention is to provide a battery device that can improve the heat dissipation effect, including a plurality of battery cells, a plurality of upper heat sink plates and a plurality of lower heat sink plates. Each upper heat dissipation plate is parallel to each other, and an upper heat dissipation channel is formed between two adjacent upper heat dissipation plates. Each lower heat dissipation plate is also parallel to each other, and a heat dissipation channel is formed between two adjacent lower heat dissipation plates.

The upper heat dissipation plate and the lower heat dissipation plate are arranged in a stack, and the upper heat dissipation plate and the lower heat dissipation plate intersect. The battery core is arranged in the upper heat dissipation channel and the lower heat dissipation channel. One side of the battery core is located in the upper heat dissipation channel, and the other side is located in the lower heat dissipation channel. When the battery equipment is working normally, the cooling airflow will flow along the upper heat dissipation channel and the lower heat dissipation channel. The cooling airflow in the upper heat dissipation channel and the lower heat dissipation channel will contact the upper and lower sides of the battery core respectively to reduce the temperature of the battery core.

When the battery core of a battery device undergoes thermal runaway, the high-heat flammable substances ejected by the thermally runaway battery core will be discharged from the battery device through the upper heat dissipation channel or the lower heat dissipation channel to avoid excessive heat accumulation in the battery device, which may cause other batteries to The core undergoes thermal runaway.

In addition, when adjacent battery cells in a battery device are thermally controlled together, the high-heat combustible substances ejected from the two battery cells will be discharged from the battery device through different upper heat dissipation channels or lower heat dissipation channels to improve the discharge of high-heat combustible substances from the battery equipment. s efficiency.

In order to achieve the above object, the present invention proposes a battery device that can improve the heat dissipation effect, including: a plurality of battery cells; a plurality of upper heat dissipation plates, each upper heat dissipation plate being parallel to each other and between two adjacent upper heat dissipation plates. An upper heat dissipation channel is formed, and the battery cores are arranged along the upper heat dissipation channel; and a plurality of lower heat dissipation plates, each lower heat dissipation plate is parallel to each other, and a lower heat dissipation channel is formed between two adjacent lower heat dissipation plates, and the battery core They are arranged along the lower heat dissipation channel, in which the upper heat dissipation plate and the lower heat dissipation plate are stacked, and the upper heat dissipation plate intersects with the lower heat dissipation plate.

In at least one embodiment of the present invention, a fireproof filter layer is located on an air inlet side of the fan device.

In at least one embodiment of the present invention, at least one fixing bracket is included to fix the positions of a plurality of battery cells.

In at least one embodiment of the present invention, the electrodes of adjacent battery cells in the same upper heat dissipation channel are opposite.

In at least one embodiment of the present invention, the electrodes of adjacent battery cells in the same lower heat dissipation channel are opposite.

In at least one embodiment of the present invention, one side of the battery core is located in the upper heat dissipation channel, and the other side is located in the lower heat dissipation channel.

In at least one embodiment of the present invention, the upper heat dissipation plate includes at least a first recessed portion, and the lower heat dissipation plate includes at least a second recessed portion. One side of the battery cell is located in the upper heat dissipation channel and contacts the upper heat dissipation plate. The first recessed portion, while the other side of the battery cell is located in the lower heat dissipation channel and contacts the second recessed portion of the lower heat dissipation plate.

In at least one embodiment of the present invention, the upper heat dissipation channels are parallel to each other, and the lower heat dissipation channels are also parallel to each other.

In at least one embodiment of the present invention, the upper heat dissipation channel and the lower heat dissipation channel intersect.

In at least one embodiment of the present invention, the upper heat sink plate and the lower heat sink plate are made of metal.

In at least one embodiment of the present invention, a plurality of conductive sheets are included to connect the battery cells located in different upper heat dissipation channels or different lower heat dissipation channels, so that the battery cells are connected in series or in parallel with each other.

In at least one embodiment of the present invention, the conductive sheet includes a plurality of conductive units and at least one connecting unit. The connecting unit is used to connect the conductive sheet so that adjacent battery cells are connected in parallel through the connecting unit.

In at least one embodiment of the present invention, the upper heat dissipation plate and the lower heat dissipation plate are used to separate battery cells connected in parallel through the connection unit, so that adjacent battery cells are located in different upper heat dissipation channels and lower heat dissipation channels respectively.

Please refer to Figures 1 and 2, which are respectively a top cross-sectional view of an upper heat sink plate of a battery device that can improve the heat dissipation effect of the present invention and an embodiment of a lower heat sink plate of a battery device that can improve the heat dissipation effect of the present invention. Top view section view. The battery device 10 mainly includes a plurality of battery cells 11, a plurality of upper heat sink plates 13, and a plurality of lower heat sink plates 15. One side of each battery cell 11 is connected to the upper heat sink plate 13, and the other side is connected to the lower heat sink plate 15.

As shown in FIG. 1 and FIG. 4 , the appearance of the upper heat dissipation plate 13 may be an approximately elongated plate, in which each upper heat dissipation plate 13 is parallel to each other. An upper heat dissipation channel 132 is formed between two adjacent upper heat dissipation plates 13 , wherein each upper heat dissipation channel 132 is parallel to each other.

As shown in FIGS. 2 and 4 , the appearance of the lower heat dissipation plate 15 may be an approximately elongated plate, in which each lower heat dissipation plate 15 is parallel to each other. A lower heat dissipation channel 152 is formed between two adjacent lower heat dissipation plates 15 , and each lower heat dissipation channel 152 is parallel to each other.

As shown in FIG. 5 , the upper heat dissipation plate 13 and the lower heat dissipation plate 15 are stacked. For example, the upper heat dissipation plate 13 is located above the lower heat dissipation plate 15 , and the bottom of the upper heat dissipation plate 13 is connected to the top of the lower heat dissipation plate 15 .

As shown in FIGS. 3 and 5 , the upper heat dissipation plate 13 and the lower heat dissipation plate 15 intersect, and the upper heat dissipation plate 13 and the lower heat dissipation plate 15 are not parallel to each other. The upper heat dissipation channel 132 intersects the lower heat dissipation channel 152 , and the battery cells 11 are arranged along the upper heat dissipation channel 132 and the lower heat dissipation channel 152 .

In one embodiment of the invention, the upper heat dissipation channel 132 is fluidly connected to the lower heat dissipation channel 152 . For example, the upper heat dissipation channel 132 and the lower heat dissipation channel 152 are connected through the space between the battery core 11 and the upper heat dissipation plate 13 and the lower heat dissipation plate 15 .

As shown in FIG. 6 , one side of the battery cell 11 is located in the upper heat dissipation channel 132 , and the other side is located in the lower heat dissipation channel 152 . For example, the upper half of the battery cell 11 is located in the upper heat dissipation channel 132 , and the lower half of the battery cell 11 is located in the lower heat dissipation channel 152 .

In an embodiment of the present invention, at least one first recessed portion 131 can be provided on the side of the upper heat dissipation plate 13 , and at least one second recessed portion 151 can be provided on the side of the lower heat dissipation plate 15 . Partial areas of the battery core 11 may be located in the first recessed portion 131 of the upper heat sink 13 and the second recessed portion 151 of the lower heat sink 15, wherein one side of the battery core 11 contacts the first recessed portion 131 of the upper heat sink 13, The other side of the battery cell 11 contacts the second recessed portion 151 of the lower heat dissipation plate 15 . In an embodiment of the present invention, the upper heat sink 13 and the lower heat sink 15 can be made of metal, and can absorb heat from the battery core 11 through thermal conduction to reduce the temperature of the battery core 11 .

As shown in FIGS. 1 and 2 , the electrodes of adjacent battery cells 11 in the same upper heat dissipation channel 132 are opposite, and the electrodes of adjacent battery cells 11 in the same lower heat dissipation channel 152 are also opposite. The positive electrodes and negative electrodes of each battery cell 11 in the channel 132 or the same lower heat dissipation channel 152 are staggered. In the same upper heat dissipation channel 132 or the same lower heat dissipation channel 152, the positive electrodes of the battery cells 11 are in contact with adjacent battery cells. The negative terminal of 11 is adjacent.

As shown in FIG. 3 , the battery device 10 includes a plurality of conductive sheets 17 , and the battery cells 11 of the battery device 10 are connected in series and/or in parallel through the conductive sheets 17 . In one embodiment of the present invention, the conductive sheet 17 is used to connect the battery cells 11 located in different or adjacent upper heat dissipation channels 132 , or to connect the battery cells 11 located in different or adjacent lower heat dissipation channels 152 .

In one embodiment of the present invention, the conductive sheet 17 includes a plurality of conductive units 171 and at least one connection unit 173, where the conductive units 171 are used to connect adjacent battery cells 11 in series, and the connection unit 173 is used to connect adjacent conductive units 173. The unit 171, for example, the conductive unit 171 is used to connect the battery cells 11 arranged along the X direction in series, and the connecting unit 173 is used to connect the battery cells 11 arranged along the Y direction in parallel, where the connecting unit 173 can be a fuse, a small resistor or a wire. .

The upper heat dissipation plate 13 and the lower heat dissipation plate 15 of the present invention are used to separate the battery cells 11 arranged in the Y direction and connected in parallel with each other, so that the battery cells 11 connected in parallel through the conductive sheet 17 are located in different upper heat dissipation channels 132 and lower heat dissipation channels. Inside channel 152.

As shown in FIG. 7 , the battery device 10 may include at least one fixing bracket 19 , where the fixing bracket 19 includes a plurality of holes 191 for accommodating and fixing the position of the battery core 11 . In an embodiment of the present invention, the number of the fixing brackets 19 can be two, and they are respectively provided at both ends of the battery core 11 to fix the position of each battery core 11 .

In actual application, one end of the battery cell 11 can be fixed on the lower fixing frame 19 first, and the lower heat sink 15 and the upper heat sink 13 can be inserted in the gap between the battery cells 11 in sequence, so that the upper heat dissipation The plate 13 is stacked above the lower heat dissipation plate 15 , and the battery core 11 is located in the upper heat dissipation channel 132 and the lower heat dissipation channel 152 . The upper fixing bracket 19 is placed on the other end of the battery core 11 , and then the conductive sheet 17 is placed on the battery core 11 .

In an embodiment of the present invention, as shown in FIG. 8 , the battery device 10 can be placed in a housing 12 , and a fan 14 is provided at one end of the housing 12 . When the fan 14 rotates, the outside air is transported into the housing 12 and forms a cooling air flow 161 .

The cooling airflow 161 in the housing 12 will be guided to the upper heat dissipation channel 132 and the lower heat dissipation channel 152 by the upper heat dissipation plate 13 and the lower heat dissipation plate 15 respectively, where the cooling airflow 161 will enter from one end of the upper heat dissipation channel 132 and the lower heat dissipation channel 152. and leaves from the other ends of the upper heat dissipation channel 132 and the lower heat dissipation channel 152 . In actual applications, part of the cooling airflow 161 may flow between the upper heat dissipation channel 132 and the lower heat dissipation channel 152 .

When the cooling airflow 161 enters the upper heat dissipation channel 132 and the lower heat dissipation channel 152 , it will contact the battery core 11 disposed in the upper heat dissipation channel 132 and the lower heat dissipation channel 152 , and take away the heat of the battery core 11 to reduce the temperature of the battery cell 11 temperature.

As shown in FIG. 9 , when the battery core 11 in the battery device 10 undergoes thermal runaway, most of the high-heat flammable substances 163 and flames ejected from the battery core 11 will be transmitted along the upper heat dissipation channel 132 or the lower heat dissipation channel 152 . Specifically, the upper heat dissipation plate 13 and the lower heat dissipation plate 15 can be used to block the high-heat combustible substance 163 ejected from the battery cell 11 from being transmitted to other or adjacent battery cells 11 in the upper heat dissipation channel 132 and the lower heat dissipation channel 152 .

In one embodiment of the present invention, as shown in FIG. 9 , one thermal runaway battery cell 111 , two first battery cells 113 , two second battery cells 115 and two third battery cells 11 can be defined. The battery cell 117 , in which the first battery cell 113 , the second battery cell 115 and the third battery cell 117 are all adjacent to the thermal runaway battery cell 111 .

As shown in FIG. 1 , the thermal runaway battery cell 111 and the first battery cell 113 are located in the same upper heat dissipation channel 132 , and are located in different or adjacent upper heat dissipation channels 132 with the second battery cell 115 and the third battery cell 117 . .

Please refer to Figure 10. The nine battery cells 11 in Figure 10 are the circuit diagram of the nine battery cells 11 in the dotted line in Figure 1. The thermal runaway battery cell 111 and the positive and negative electrodes of the first battery cell 113 and the third battery cell 117 The arrangement direction is opposite and the same as the arrangement direction of the positive and negative electrodes of the second battery cell 115 , wherein the thermal runaway battery cell 111 and the second battery cell 115 are connected in parallel via the connection unit 173 of the conductive sheet 17 . Specifically, if the positive electrode of the thermal runaway battery cell 111 faces upward, the positive electrode of the second battery cell 115 also faces upward, and the negative electrodes of the first battery cell 113 and the third battery cell 117 face upward.

When the upper heat sink 13 and the lower heat sink 15 are not provided, the thermally runaway battery cell 111 may eject high-heat flammable substances 163 toward the adjacent first battery cell 113, second battery cell 115, and third battery cell 117. The heat will be transferred to the first battery cell 113 , the second battery cell 115 and the third battery cell 117 through thermal conduction, causing the temperatures of the first battery cell 113 , the second battery cell 115 and the third battery cell 117 to rise significantly.

In addition, when the thermal runaway battery core 111 undergoes thermal runaway, a short circuit will be formed, causing the second battery cell 115 to output a large current I to the thermal runaway battery core 111 through the connection unit 173 of the conductive sheet 17 , causing the temperature of the second battery core 115 to further rise. High, and greatly increases the probability of thermal runaway of the second battery cell 115. Specifically, the second battery cell 115 is affected by the thermal runaway battery cell 111 , and the probability of thermal runaway may be greater than that of the first battery cell 113 and the third battery cell 117 .

The present invention uses the upper heat sink 13 and the lower heat sink 15 to isolate the thermal runaway battery cells 111 and the second battery cells 115 that are connected in parallel through the connection unit 173, so that the battery cells 11 that are connected in parallel through the connection unit 173 are located in different upper heat dissipation channels 132 and 132, respectively. In the lower heat dissipation channel 152, the high-heat combustible substance 163 ejected by the thermal runaway battery cell 111 is reduced from being transferred to the second battery cell 115, and the probability of the second battery cell 115 experiencing thermal runaway is reduced.

In addition, since the thermal runaway battery cell 111 and the second battery cell 115 are located in different upper heat dissipation channels 132 and lower heat dissipation channels 152, even if the thermal runaway battery cell 111 and the second battery cell 115 undergo thermal runaway together, they can still pass through different heat dissipation channels 132 and 152, respectively. The upper heat dissipation channel 123 and/or the lower heat dissipation channel 152 guide the high-heat flammable substances 163 ejected from the thermally runaway battery cell 111 and the second battery cell 115 respectively.

In one embodiment of the present invention, the positive electrodes of the thermal runaway battery cell 111 and the second battery cell 115 are respectively located in adjacent upper heat dissipation channels 132, and the positive electrode of the thermal runaway battery cell 111 and the negative electrode of the first battery cell 113 are located at the same location. In one upper heat dissipation channel 132.

Generally, the valve of the battery cell 11 is usually set at the positive electrode. Therefore, the thermally runaway battery cell 111 will eject high-heat combustible substances 163 from the positive electrode located above. Most of the high-heat combustible substances 163 will spread along the upper heat dissipation channel 132 and interact with the same The negative electrodes of adjacent first battery cells 113 in the upper heat dissipation channel 132 are in contact.

As shown in FIG. 2 , when the first battery cell 113 absorbs heat from the adjacent thermally runaway battery cell 111 or the ejected high-heat flammable substance 163 , causing the first battery cell 113 to undergo thermal runaway. Since the positive electrode of the first battery cell 113 faces downward, the thermally runaway first battery cell 113 will eject high-heat combustible substances 163 from the positive electrode located below, and most of the high-heat combustible substances 163 will spread along the lower heat dissipation channel 152 .

Specifically, the high-heat combustible substance 163 ejected by the thermally runaway battery core 111 will be ejected into the upper heat dissipation channel 132 , and guided and transmitted to the upper heat dissipation channel 132 or the outside of the battery device 10 via the upper heat dissipation channel 132 . The high-heat combustible substance 163 ejected from the first battery cell 113 adjacent to the thermally runaway battery cell 111 will be sprayed into the lower heat dissipation channel 152 and guided and transmitted to the lower heat dissipation channel 152 or the outside of the battery device 10 through the lower heat dissipation channel 152 . Therefore, the high-heat flammable substances 163 ejected by the thermally runaway battery cell 111 and the adjacent first battery cell 113 will be transmitted to the outside through different heat dissipation channels, which can improve the thermal runaway battery core 111 and the thermally runaway first battery cell 113 . The heat dissipation effect is good, and the chain reaction of thermal runaway of the battery cell 11 is avoided.

In addition, although the positive electrode of the thermally runaway battery cell 111 is adjacent to the positive electrode of the second battery cell 115 , they are located in different upper heat dissipation channels 132 and are isolated by the upper heat dissipation plate 13 . This prevents the high-heat flammable substance 163 ejected from the positive electrode of the thermally runaway battery cell 111 from being transferred to the adjacent upper heat dissipation channel 132 and the positive electrode of the adjacent second battery cell 115, thereby preventing the temperature of the positive electrode of the second battery cell 115 from being too high. As a result, the second battery cell 115 undergoes thermal runaway.

Even if the second battery cell 115 absorbs heat from the thermal runaway battery cell 111, causing the second battery cell 115 to undergo thermal runaway. The positive electrode of the thermally runaway second battery cell 115 will eject high-heat flammable substances 163 toward the upper heat dissipation channel 132 that is different from the thermally runaway battery cell 111 , causing the thermally runaway battery core 111 and the adjacent second battery cell 115 to eject high-heat flammable substances. 163 are transmitted to the outside through different upper heat dissipation channels 132 to improve the heat dissipation effect.

It can be seen from the above that under normal use conditions, the battery device 10 of the present invention can guide the cooling airflow 161 through the upper heat dissipation plate 13 and the lower heat dissipation plate 15 . The cooling airflow 161 will flow along the upper heat dissipation channel 132 and the lower heat dissipation channel 152 and contact the battery core 11 in the upper heat dissipation channel 132 and the lower heat dissipation channel 152 to take away the heat of the battery core 11 .

When the battery core 11 in the battery device 10 undergoes thermal runaway, the upper heat dissipation plate 13 and the lower heat dissipation plate 15 can be used to guide the high-heat combustible material 163 ejected from the thermally runaway battery core 11 and guide the high-heat combustible material 163 to the outside. In addition, when adjacent battery cells 11 undergo thermal runaway at the same time, the high-heat flammable substances 163 ejected from the adjacent battery cells 11 will be transmitted to the battery device 10 through different upper heat dissipation channels 132 or different lower heat dissipation channels 152 respectively. The outside is conducive to quickly guiding the high-heat combustible substances 163 ejected by the thermally runaway battery core 11 to the outside through different paths, so as to prevent the high-heat combustible substances 163 from accumulating in the battery device 10 for a long time and causing other battery cells 11 to overheat. Thermal runaway situation.

In the above embodiment of the present invention, only a single row of battery cells 11 is disposed in the upper heat dissipation channel 132 and the lower heat dissipation channel 152 . However, in practical applications, the upper heat dissipation channel 132 and the lower heat dissipation channel 152 can also be provided with multiple rows of battery cells 11, such as two rows of battery cells 11, which can also achieve the effects described in the present invention. In addition, in an embodiment of the present invention, the angle between the upper heat dissipation plate 13 and the lower heat dissipation plate 15 may also be 90 degrees.

The above is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. That is, all changes in shape, structure, characteristics and spirit described in the patent scope of the present invention may be equal to those described above. Modifications should be included in the patentable scope of the present invention.

10:Battery equipment 11:Battery core 111: Thermal runaway battery cell 113:First battery cell 115: Second battery cell 117:Third battery cell 12: Shell 13: Upper heat sink 131: First depression 132: Upper heat dissipation channel 14:Fan 15: Lower heat sink plate 151: Second depression 152: Lower heat dissipation channel 161: Cooling airflow 163: High heat combustible substances 17: Conductive sheet 171: Conductive unit 173:Connection unit 19:fixed frame 191: Setting hole I: current

[Fig. 1] is a top cross-sectional view of an upper heat dissipation plate of a battery device that can improve heat dissipation effect according to an embodiment of the present invention.

[Fig. 2] is a top cross-sectional view of an embodiment of the lower heat dissipation plate of the battery equipment that can improve the heat dissipation effect of the present invention.

[Fig. 3] is a top perspective view of a battery device that can improve heat dissipation effect according to an embodiment of the present invention.

[Fig. 4] is a three-dimensional exploded schematic diagram of an embodiment of the upper heat sink and the lower heat sink of the battery equipment that can improve the heat dissipation effect of the present invention.

[Fig. 5] is a schematic three-dimensional view of an embodiment of the stacked upper and lower heat sink plates of the battery equipment according to the present invention that can improve the heat dissipation effect.

[Fig. 6] is a three-dimensional perspective view of a battery core, an upper heat sink plate, and a lower heat sink plate of a battery device that can improve heat dissipation effect according to an embodiment of the present invention.

[Fig. 7] is a schematic three-dimensional view of a battery cell and a fixing frame of a battery device that can improve heat dissipation effect according to an embodiment of the present invention.

[Figure 8] and [Figure 9] are schematic cross-sectional views of another embodiment of the battery device that can improve the heat dissipation effect of the present invention.

[Fig. 10] is a schematic circuit connection diagram of an embodiment of a battery device that can improve the heat dissipation effect of the present invention.

10:Battery equipment

11:Battery core

111: Thermal runaway battery cell

113:First battery cell

115: Second battery cell

117:Third battery cell

13: Upper heat sink

132: Upper heat dissipation channel

163: High heat combustible substances

Claims (10)

A battery device that can improve the heat dissipation effect, including: a plurality of battery cells; a plurality of upper heat dissipation plates, each of the upper heat dissipation plates are parallel to each other, and an upper heat dissipation channel is formed between two adjacent upper heat dissipation plates, and The upper half of the battery core is arranged along the upper heat dissipation channel; and a plurality of lower heat dissipation plates, each of the lower heat dissipation plates are parallel to each other, and a heat dissipation channel is formed between two adjacent lower heat dissipation plates, and the The lower half of the battery core is arranged along the lower heat dissipation channel, wherein the upper heat dissipation plate and the lower heat dissipation plate are stacked, and the upper heat dissipation plate intersects with the lower heat dissipation plate; wherein the upper heat dissipation channels are parallel to each other, and the The lower heat dissipation channels are also parallel to each other; the upper heat dissipation channel and the lower heat dissipation channel intersect, and a cooling airflow is guided to the upper heat dissipation channel and the lower heat dissipation channel by the upper heat dissipation plate and the lower heat dissipation plate. The battery device that can improve the heat dissipation effect as described in claim 1 includes at least one fixing bracket for fixing the positions of the plurality of battery cells. The battery device that can improve the heat dissipation effect as described in claim 1, wherein the electrodes of adjacent battery cells in the same upper heat dissipation channel are opposite. The battery device that can improve the heat dissipation effect as described in claim 3, wherein the electrodes of the adjacent battery cells in the same lower heat dissipation channel are opposite. The battery device that can improve the heat dissipation effect as described in claim 1, wherein one side of the battery cell is located in the upper heat dissipation channel, and the other side is located in the lower heat dissipation channel. The battery device that can improve the heat dissipation effect as claimed in claim 1, wherein the upper heat dissipation plate includes at least a first recessed portion, and the lower heat dissipation plate includes at least a second recessed portion, and one side of the battery core is located on the The upper heat dissipation channel contacts the first recessed portion of the upper heat dissipation plate, while the other side of the battery cell is located in the lower heat dissipation channel and contacts the second recessed portion of the lower heat dissipation plate. The battery device that can improve the heat dissipation effect as described in claim 1, wherein the upper heat sink plate and the lower heat sink plate are made of metal. The battery device that can improve the heat dissipation effect as described in claim 1 includes a plurality of conductive sheets connected to the battery cells located in different upper heat dissipation channels or different lower heat dissipation channels, so that the battery cells are connected in series or in parallel with each other. The battery device that can improve the heat dissipation effect as described in claim 8, wherein the conductive sheet includes a plurality of conductive units and at least one connecting unit. The connecting unit is used to connect the conductive sheet so that the adjacent battery cells are connected through the connection unit. Units are connected in parallel. The battery device that can improve the heat dissipation effect as described in claim 9, wherein the upper heat sink plate and the lower heat sink plate are used to separate the battery cells connected in parallel through the connection unit, so that the adjacent battery cells are located in different places. in the upper heat dissipation channel and the lower heat dissipation channel.

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