CN111276657A - Air-cooled battery module - Google Patents

Abstract

The invention relates to an air-cooled battery module, which comprises a box body and a plurality of battery monomers, wherein the box body comprises a box bottom and a box cover detachably arranged on the box bottom, an accommodating cavity is formed between the box bottom and the box cover, a heat dissipation part is arranged in the accommodating cavity, the accommodating cavity is divided into a plurality of battery grooves by the heat dissipation part, a connecting part is arranged on the groove wall of each battery groove, the battery monomers are inserted into the battery grooves and are electrically connected with the connecting parts, the heat dissipation part is provided with a heat dissipation channel, and two ends of the heat dissipation channel are respectively communicated with the. Through setting up the radiating piece, will install the free chamber that holds of battery and cut apart into a plurality of battery jars, make every battery monomer all can contact with the radiating piece to carry out the heat exchange through heat dissipation channel and outside air, avoided the air to carry dust or steam entering battery jar, this structure has the characteristics that the radiating efficiency is high and the leakproofness is good.

Description

Air-cooled battery module

technical field

The invention relates to the technical field of batteries, in particular to an air-cooled battery module.

Background technique

At present, power batteries have been widely used in various fields involving energy storage. With the increasing popularity of electric vehicle products, the demand for power batteries is getting higher and higher. In order to make the output power and endurance of the battery meet the design requirements, a method of connecting a plurality of battery cells to form a battery module is mainly adopted at present, so as to facilitate the installation and use of the battery. In order to improve the space utilization rate of the battery module, a plurality of battery cells are closely arranged and installed in the casing of the battery module, and then connected in series or in parallel through connecting pieces. During the charging or discharging process of the battery cell, a large amount of heat energy will be generated inside, which will cause the temperature of the battery cell to rise, which is not conducive to the normal operation of the battery. At present, there are two main ways to dissipate heat for battery cells: air cooling and liquid cooling. Among them, liquid cooling mainly uses cooling pipelines to take away heat through the cooling liquid in the pipelines. This method requires complex pipeline structures and Coolant and driving device, the manufacturing process is complicated and the cost is high. Air cooling mainly removes heat through air circulation, and the cost is lower. However, dust or water vapor is easily carried in the air, which has a great impact on the use environment of the battery. At the same time, the structure of some battery modules is not conducive to air circulation, resulting in low air cooling efficiency.

Therefore, there is an urgent need for an air-cooled battery module, which has high air-cooling efficiency and good airtightness, and can be used in a dusty or humid environment.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an air-cooled battery module, which has the characteristics of high cooling efficiency and good sealing performance.

For this purpose, the present invention adopts the following technical solutions:

Provided is an air-cooled battery module, comprising a box body and a plurality of battery cells, the box body comprising a box bottom and a box cover detachably arranged on the box bottom, and the box bottom and the box cover are formed between the box bottom and the box cover. A accommodating cavity, a heat sink is arranged in the accommodating cavity, the heat sink divides the accommodating cavity into a plurality of battery slots, a connecting piece is arranged on the slot wall of the battery slot, and the battery cells are inserted in the The battery slot is electrically connected to the connector, the heat dissipation member is provided with a heat dissipation channel, and both ends of the heat dissipation channel are respectively communicated with the outside of the box.

Further, the heat dissipation member includes two parallel and spaced heat dissipation plates, the heat dissipation channel is formed between the two heat dissipation plates, and the two ends of the heat dissipation plate are respectively connected to the two opposite side walls of the box bottom. , the side wall is provided with a heat dissipation hole running through its inner and outer surfaces, and the heat dissipation channel is communicated with the heat dissipation hole.

Further, the ratio of the total opening area of the heat dissipation hole to the area of the cross section of the heat dissipation channel is 10% to 99%.

Further, the heat dissipation plate is provided with a wave-shaped bent portion.

Further, the heat dissipation member further includes a plurality of support columns, the plurality of support columns are arranged in the heat dissipation channel at intervals, and two ends of the support columns are respectively connected to the two heat dissipation plates.

Further, the connector includes a contact portion and an elastic portion, one end of the elastic portion is connected to a side surface of the slot wall away from the battery slot, and the other end of the elastic portion is connected to the contact portion The groove wall is provided with a connection hole, the contact part can selectively block the connection hole, and part of the contact part can pass through the connection hole and be electrically connected with the battery cell.

Further, the contact portion includes a convex portion in the shape of a curved surface, the battery cell includes a pole, the pole is provided with a concave portion matched with the convex portion, and the convex portion passes through The connecting hole is in contact with the concave portion.

Further, the contact portion is provided with a sealing ring, and the contact portion is sealedly connected to the connection hole through the sealing ring.

Further, a sealing gasket is arranged between the box bottom and the box cover.

Further, on the box bottom and the box cover, one of the two is provided with a card slot, and the other of the two is provided with a snap-on protrusion matched with the card slot, and the box bottom and the box cover pass through. The card slot is engaged with the card protrusion.

The present invention has the beneficial effects compared to the prior art:

The air-cooled battery module of the present invention divides the accommodating cavity in which the battery cells are installed into a plurality of battery slots by disposing the heat sink, so that each battery cell can be in contact with the heat sink and communicate with the outside air through the heat dissipation channel. The heat exchange is performed to prevent the air from carrying dust or water vapor into the battery tank, and the structure has the characteristics of high heat dissipation efficiency and good sealing performance.

Description of drawings

FIG. 1 is a structural diagram of a battery module of an embodiment (battery cells are not fully shown).

FIG. 2 is a cross-sectional view of a battery cell module of an embodiment (battery cells are not fully shown).

3 is a cross-sectional view of the tank bottom of the embodiment.

In the picture:

1. Box bottom; 10. Heat sink; 101, Heat sink; 11, Battery slot; 110, Connecting hole; 12, Connecting piece; 121, Contact part; 1210, Raised part; 122, Elastic part; 123, Sealing ring ; 13, heat dissipation hole; 2, battery cell; 20, shell; 21, pole; 210, depression; 3, box cover.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

As shown in FIGS. 1 to 3 , an air-cooled battery module provided by the present invention includes a box body and a plurality of battery cells 2 . The box body includes a box bottom 1 and a box cover 3 detachably arranged on the box bottom 1 , A accommodating cavity is formed between the box bottom 1 and the box cover 3, and a radiator 10 is arranged in the accommodating cavity. The radiator 10 divides the accommodating cavity into a plurality of battery slots 11, and a connecting member 12 is arranged on the groove wall of the battery slot 11. The body 2 is inserted into the battery slot 11 and is electrically connected with the connector 12 . The heat sink 11 is provided with a heat dissipation channel, and both ends of the heat dissipation channel are respectively communicated with the outside of the box. It can be understood that the battery cell 2 includes a casing 20 in a cavity structure, a core pack installed in the casing 20, and a pole 21 installed on the casing 20, and the pole 21 is electrically connected to the core pack, Used to conduct electrical energy. The connector 12 is made of conductive material, and the connector 12 is respectively connected with the pole 21 and the external electrical device, so as to realize the electrical connection between the battery cell 2 and the external electrical device. The plurality of battery cells 2 are connected in series or in parallel through the connecting member 12 . In this embodiment, the accommodating cavity is separated by the heat sink 10, so that the battery cell 2 can be installed in the battery slot 11 independently, and one side or both sides of the battery cell 2 can be connected to the heat sink 10. After the body 2 generates heat, the heat can be transferred to the heat sink 10 through the casing 20 . The heat sink 10 is provided with a heat dissipation channel that communicates with the outside of the box. The air around the box circulates in the heat dissipation channel, and takes away the heat on the heat sink 10 to realize the heat dissipation of the battery cells 2 . At the same time, the air outside the box circulates through the heat dissipation channel, which can prevent dust or water vapor in the air from polluting the battery cells 2 , which is conducive to maintaining a good environment for the installation space of the battery cells 2 . Thus, the normal use of the battery cell 2 is ensured and the service life is prolonged.

Specifically, each battery cell 2 includes two poles 21 , and the connecting member 12 is disposed correspondingly to the poles 21 .

Specifically, the heat dissipation member 10 includes two parallel and spaced heat dissipation plates 101 . A heat dissipation channel is formed between the two heat dissipation plates 101 . There are heat dissipation holes 13 running through its inner and outer surfaces, and the heat dissipation channel communicates with the heat dissipation holes 13 . In this embodiment, the heat sink 10 may be a metal material with good thermal conductivity such as an aluminum plate, a copper plate, and a nickel plate, and is preferably made of an aluminum plate with light weight and good thermal conductivity.

Specifically, the ratio of the total opening area of the heat dissipation holes 13 to the area of the cross section of the heat dissipation channel is 10%˜99%. It can be understood that, the larger the opening area of the heat dissipation hole 13 is, the more favorable the air circulation is, so as to improve the heat exchange efficiency between the heat dissipation plate 101 and the air. At the same time, if the opening area is too large, the strength of the side wall of the box bottom 1 will be weakened. Therefore, the specific opening area of the heat dissipation hole 13 can be flexibly selected according to the actual design parameters of the box. In this embodiment, the ratio is preferably 50% to 80%.

It should be noted that the total opening area of the heat dissipation holes 13 is the sum of the areas of the heat dissipation holes 13 . For example, when there is one heat dissipation hole 13, the total opening area is the area of the heat dissipation hole 13;

Specifically, there are a plurality of heat dissipation holes 13 , and the plurality of heat dissipation holes 13 are arranged at intervals. It can be understood that under the condition of the same opening area, providing multiple heat dissipation holes 13 is beneficial to reduce the aperture of a single heat dissipation hole 13, which can prevent external sundries from entering the heat dissipation channel and affect the normal use of the battery module.

In one embodiment, the heat dissipation plate 101 is provided with a wave-shaped bent portion. It can be understood that setting the wave-shaped bent portion is beneficial to increase the surface area of the heat dissipation plate 101 and improve the heat exchange efficiency between the heat dissipation plate 101 and the air in the heat dissipation channel. In this embodiment, a thermally conductive adhesive layer is provided on the side of the heat dissipation plate 101 close to the battery cells 2 , and the thermally conductive adhesive layer is coated on the trough position of the bent portion. After the battery cell 2 is inserted into the battery slot 11, the case 20 is in contact with the peak position of the bent portion, and the trough portion of the bent portion is coated with a thermally conductive layer, thereby increasing the contact area between the bent portion and the case 20. It is beneficial to transfer heat from the battery cells 2 to the heat dissipation plate 101 .

In another embodiment, the heat sink 10 further includes a plurality of support columns, the plurality of support columns are arranged in the heat dissipation channel at intervals, and two ends of the support columns are respectively connected to the two heat dissipation plates 101 . In this embodiment, the support column and the heat dissipation plate 101 are made of the same material. By disposing the support column, the strength of the heat dissipation plate 101 can be strengthened to prevent the heat dissipation plate 101 from being squeezed when the battery cell 2 is inserted into the battery slot 11 . deformation occurs. At the same time, the support column increases the contact area between the heat dissipation member 10 and the air in the heat dissipation channel, which is beneficial to improve the heat exchange efficiency.

Specifically, the connector 12 includes a contact part 121 and an elastic part 122. One end of the elastic part 122 is connected to the side of the groove wall away from the battery groove 11, and the other end of the elastic part 122 is connected to the contact part 121. There is a connection hole 110 , the contact part 121 can selectively block the connection hole 110 , and part of the contact part 121 can pass through the connection hole 110 and be electrically connected to the battery cell 2 . In this embodiment, the function of the contact portion 121 is to pass through the connection hole 110 to electrically connect with the battery cell 2 . Under normal conditions, the contact portion 121 is connected to the connection hole 110 by the elastic force of the elastic portion 122 to block the connection hole 110 . Part of the contact portion 121 protrudes from the inner surface of the battery slot 11 through the connection hole 110 . When the battery cell 2 is inserted into the battery slot 11 , interference is formed between the battery cell 2 and the protruding part of the contact part 121 , and the protruding part of the contact part 121 is pushed away from the battery slot 11 by the pressing force of the battery cell 2 . side avoidance. After the battery cell 2 is inserted into the battery slot 11, the contact portion 121 passes through the connection hole 110 under the elastic force of the elastic portion 122 and abuts against the pole 21 on the battery cell 2, so that the battery cell 2 is clamped Tighten, and at the same time realize the electrical connection between the contact part 121 and the pole 21 .

Specifically, the poles 21 of the battery cells 2 are recessed on the casing 20 . The top of the pole 21 is lower than the surface of the casing 20 . With this structure, when the battery cell 2 is inserted into the battery slot 11 , each surface of the case 20 abuts against the inner wall of the battery slot 11 , which can prevent the pole 21 from contacting the inner wall of the battery slot 11 .

Specifically, the contact portion 121 includes a convex portion 1210 in the shape of a curved surface, and the battery cell 2 includes a pole 21 . The pole 21 is provided with a concave portion 210 matched with the convex portion 1210 , and the convex portion 1210 passes through the connection hole. 110 and abut against the recessed portion 210 . It can be understood that by arranging the corresponding convex part 1210 and the concave part 210 on the contact part 121 and the pole 21 respectively, the contact area between the two can be increased and the connection stability of the two can be ensured. At the same time, the battery cell 2 can also be limited and fixed by the convex portion 1210 and the concave portion 210 .

Specifically, the contact part 121 is provided with a sealing ring 123 , and the contact part 121 is sealedly connected to the connection hole 110 through the sealing ring 123 . It can be understood that the sealing ring 123 is provided at the connection between the contact part 121 and the connection hole 110, which can improve the sealing between the contact part 121 and the connection hole 110 and prevent the dust or water vapor in the outside air from entering the battery slot. , damaging the use environment of the battery cell 2 .

Specifically, a sealing gasket is provided between the box bottom 1 and the box cover 3 . It can be understood that a sealing gasket is arranged between the box bottom 1 and the box cover 3, which is beneficial to improve the waterproof and dustproof performance of the battery module.

Specifically, on the box bottom 1 and the box cover 3, one of the two is provided with a card slot, and the other of the two is provided with a card protrusion matched with the card groove, and the two are connected by the card groove and the card protrusion. Of course, in other embodiments, other connection manners may also be used. Such as plugging, gluing and bundling.

The significant effect of this embodiment is: by disposing the heat sink 10, the accommodating cavity for installing the battery cells 2 is divided into a plurality of battery slots 11, so that each battery cell 2 can be in contact with the heat sink 10 and pass through the heat dissipation channel The heat exchange with the outside air prevents the air from carrying dust or water vapor into the battery tank 11, and the structure has the characteristics of high heat dissipation efficiency and good sealing performance.

The above contents are only preferred embodiments of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. limits.

Claims (10)

1. An air-cooled battery module, characterized by comprising a box body and a plurality of battery cells, the box body comprising a box bottom and a box cover detachably arranged on the box bottom, the box bottom and the box An accommodating cavity is formed between the covers, and a heat sink is arranged in the accommodating cavity. The heat sink divides the accommodating cavity into a plurality of battery slots, and the slot walls of the battery slots are provided with connecting pieces, and the battery cells The body is inserted into the battery slot and is electrically connected with the connecting piece, the heat dissipation piece is provided with a heat dissipation channel, and both ends of the heat dissipation channel are respectively communicated with the outside of the box body. 2 . The air-cooled battery module according to claim 1 , wherein the heat dissipation member comprises two parallel and spaced heat dissipation plates, and the heat dissipation channel is formed between the two heat dissipation plates, and the heat dissipation channel is formed between the two heat dissipation plates. 3 . Two ends of the heat dissipation plate are respectively connected with two opposite side walls of the bottom of the box, the side walls are provided with heat dissipation holes penetrating the inner and outer surfaces thereof, and the heat dissipation channels are communicated with the heat dissipation holes. 3 . The air-cooled battery module according to claim 2 , wherein the ratio of the total opening area of the heat dissipation hole to the area of the cross section of the heat dissipation channel is 10% to 99%. 4 . 4 . The air-cooled battery module according to claim 2 , wherein the heat dissipation plate is provided with a wave-shaped bent portion. 5 . 5 . The air-cooled battery module according to claim 2 , wherein the heat dissipation member further comprises a plurality of support columns, the plurality of support columns are arranged in the heat dissipation channel at intervals, and the support columns are arranged at intervals. 6 . The two ends are respectively connected with the two cooling plates. 6 . The air-cooled battery module according to claim 1 , wherein the connecting member comprises a contact portion and an elastic portion, one end of the elastic portion and a side surface of the slot wall facing away from the battery slot. 7 . The other end of the elastic part is connected to the contact part, the groove wall is provided with a connection hole, the contact part can selectively block the connection hole, and part of the contact part can pass through through the connection hole and electrically connected with the battery cell. 7 . The air-cooled battery module according to claim 6 , wherein the contact portion comprises a convex portion in the shape of a curved surface, the battery cell comprises a pole, and the pole is provided with the The convex part is matched with the concave part, and the convex part passes through the connecting hole and abuts with the concave part. 8 . The air-cooled battery module of claim 6 , wherein the contact portion is provided with a sealing ring, and the contact portion is sealedly connected to the connection hole through the sealing ring. 9 . 9 . The air-cooled battery module of claim 1 , wherein a sealing gasket is provided between the box bottom and the box cover. 10 . 10 . The air-cooled battery module according to claim 1 , wherein one of the box bottom and the box cover is provided with a card slot, and the other of the two is provided with a card slot corresponding to the The card groove is matched with the card protrusion, and the box bottom and the box cover are connected through the card groove and the card protrusion.

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