CN204991903U - Battery box heat radiation structure - Google Patents

Abstract

The utility model belongs to the technical field of the battery heat dissipation, in particular to battery box heat radiation structure, including battery box, fixed beam, battery module, air intake and air outlet, the fixed beam sets up in the battery box internally, and a plurality of battery modules are closely fixed in proper order on the fixed beam, and just a plurality of battery modules fill up in the battery box, and the fixed beam sets up to hollow structure, and the fixed beam is provided with the ventilation hole, and the air intake passes through fixed beam and air outlet intercommunication, and air intake, fixed beam, battery module, battery box and air outlet form a heat dissipation channel. The utility model discloses be provided with special heat dissipation channel, when using cold wind to dispel the heat to the internal battery module of battery box, avoided the internal burble of battery box through above -mentioned heat dissipation channel, thereby improved the utility model discloses a radiating effect.

Description

A heat dissipation structure of a battery box

technical field

The utility model belongs to the technical field of battery heat dissipation, in particular to a heat dissipation structure of a battery box.

Background technique

Modern electric vehicles put forward higher and higher requirements for the battery life of lithium-ion electronics, which promotes the development of lithium-ion batteries in the direction of high energy density and high rate charge and discharge. However, the heating problem of lithium-ion batteries during high-rate discharge has always plagued the lithium battery industry. For safety and stability considerations, some heat dissipation methods will be used for lithium-ion battery boxes discharged at high rates. The commonly used heat dissipation methods are natural cooling. , air-cooled and water-cooled. Natural cooling is to let the heat dissipate naturally. This method has a relatively small effect on temperature control, and is generally used on products with relatively small heat generation; air cooling uses a fan to control the temperature of the heating element, and the effect of air cooling is relatively Natural cooling is obvious; water cooling uses water-cooled plates or tubes to control the temperature of the heating element, and the effect of water-cooling is more obvious than that of air-cooling.

Because water cooling needs to use water cooling plate or water cooling tube, and the price of water cooling plate or water cooling tube is relatively high, the process is more complicated, and a special water cooling system needs to be added, so the water cooling system can only be used on relatively high-end products; compared with water cooling , Air cooling has relatively great advantages in terms of technology and price, and the effect of controlling the temperature of the heating element is also more obvious. When applied to the battery box, when the battery is discharged at a high rate, the control of heat generation is more advantageous.

However, the structure of the battery box that uses air cooling means is too simple, and it is easy to generate eddy currents in the battery box during air cooling and heat dissipation, thereby affecting its heat dissipation effect.

Utility model content

The purpose of this utility model is to provide a heat dissipation structure for a battery box in view of the deficiencies in the prior art. The heat dissipation structure is provided with a special heat dissipation channel. The heat dissipation channel avoids the eddy current in the battery box, thereby improving the heat dissipation effect.

In order to achieve the above object, the technical solution of the utility model is:

A heat dissipation structure for a battery box, comprising a battery box body, a fixed beam, a battery module, an air inlet and an air outlet, the fixed beam is arranged in the battery box, and a plurality of the battery modules are tightly fixed in sequence On the fixed beam, and a plurality of the battery modules are filled in the battery box, the fixed beam is set as a hollow structure, the fixed beam is provided with a ventilation hole, and the air inlet passes through the fixed beam and The air outlet is connected, and the air inlet, the fixed beam, the battery module, the battery box and the air outlet form a heat dissipation channel.

As an improvement of the heat dissipation structure of the battery box according to the present invention, it further includes a partition, the partition is welded to the fixed beam, and the partition is in close contact with the battery module.

As an improvement to the heat dissipation structure of the battery box described in the present invention, the separator is arranged in an "L" shape or a "1" shape.

As an improvement of the heat dissipation structure of the battery box described in the present invention, the battery box includes a lower box shell, a side shell of the box and an upper shell of the box, and the lower shell of the box and the side shell of the box As an integral structure, the upper shell of the box body is closely connected to the side shell of the box body.

As an improvement of the heat dissipation structure of the battery box described in the present invention, both the lower shell of the box and the upper shell of the box are provided with reinforcing bumps, and the reinforcing bumps are arranged in a square structure.

As an improvement of the heat dissipation structure of the battery box described in the present invention, the number of the fixed beams is set to three, and two of the fixed beams are respectively arranged on the lower shell of the box body and the side shell of the box body The other one is set in the middle of the lower casing of the box, and the two ends are respectively connected with the side casings of the box.

As an improvement of the heat dissipation structure of the battery box described in the present invention, the air inlet communicates with the fixed beam through a shroud, and the air inlet communicates with an air supply device.

As an improvement of the heat dissipation structure of the battery box described in the present invention, the air outlet is connected with an exhaust device.

As an improvement of the heat dissipation structure of the battery box described in the present invention, a fan is provided at the position of the air outlet.

As an improvement of the heat dissipation structure of the battery box described in the utility model, the battery module includes a plurality of batteries, end plates and surrounding plates, the end plates and the surrounding plates surround a plurality of batteries, and the end plates Protrusions are provided at both ends of the bottom of the plate, and the surrounding plate is arranged in a "U"-shaped structure and tightly connected with a plurality of the batteries.

The beneficial effects of the utility model are: the utility model includes a battery box, a fixed beam, a battery module, an air inlet and an air outlet, the fixed beam is arranged in the battery box, and a plurality of battery modules are tightly fixed on the fixed beam in sequence , and multiple battery modules are filled in the battery box, the fixed beam is set as a hollow structure, the fixed beam is provided with ventilation holes, the air inlet is connected with the air outlet through the fixed beam, the air inlet, the fixed beam, the battery module, and the battery box The body and the air outlet form a heat dissipation channel. The utility model is provided with a special cooling channel. When using cold air to dissipate heat from the battery module in the battery box, the eddy current in the battery box is avoided through the above cooling channel, thereby improving the cooling effect of the utility model.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic view of the utility model without the upper shell of the box body and the battery module.

FIG. 3 is a partial structural schematic diagram of FIG. 2 .

Fig. 4 is a sectional view of the utility model.

Fig. 5 is a structural schematic diagram of the utility model using an "L"-shaped structural partition.

Fig. 6 is a structural schematic diagram of the utility model using a "1"-shaped structural partition.

Fig. 7 is a structural schematic diagram of an "L"-shaped structural partition in the present invention.

Fig. 8 is a structural schematic diagram of a "1"-shaped structural partition in the present invention.

FIG. 9 is a schematic structural diagram of the battery module in the present invention.

Among them: 1-battery box,

11-casing lower shell, 111-reinforcing projection,

12-box side shell, 13-box upper shell;

2-fixed beam, 21-ventilation hole;

3-battery module, 31-end plate, 32-coaming plate, 33-bulge;

4-air inlet;

5-air outlet, 51-fan;

6 - clapboard;

7 - Shroud.

detailed description

The utility model will be further described in detail below in conjunction with the specific implementation and the accompanying drawings, but the implementation of the utility model is not limited thereto.

As shown in Figures 1 to 9, a heat dissipation structure of a battery box includes a battery box body 1, a fixed beam 2, a battery module 3, an air inlet 4, and an air outlet 5, and the fixed beam 2 is arranged in the battery box 1. Each battery module 3 is tightly fixed on the fixed beam 2 in turn, and a plurality of battery modules 3 are filled in the battery box 1, the fixed beam 2 is set as a hollow structure, the fixed beam 2 is provided with a ventilation hole 21, and the air inlet 4 The fixed beam 2 communicates with the air outlet 5. The air inlet 4, the fixed beam 2, the battery module 3, the battery box 1 and the air outlet 5 form a heat dissipation channel (not shown in the figure). The heat dissipation channel is a square closed space, and the cold air It flows into the hollow fixed beam 2 through the air inlet 4, and then enters the heat dissipation channel through the ventilation hole 21, so that the heat dissipation channel is filled with cold air, and then the cold air contacts the battery module 3 to take away the heat generated by the battery module 3, and finally passes through Air outlet 5 takes heat out.

The utility model also includes a separator 6, which is welded to the fixed beam 2, and the separator 6 is in close contact with the battery module 3, and the separator 6 is set as an "L"-shaped structure or a "1"-shaped structure. Depending on the number of groups 3, you can choose an "L"-shaped structure or a "1"-shaped structure for the separator 6 (choose an "L"-shaped structure when the number of battery modules is odd, and choose an "L"-shaped structure when there are even numbers of battery modules Choose the "1" shape structure), so that the conduction effect of the heat dissipation channel is better. The separator 6 plays the role of isolation and flow guide, and can relatively isolate the heat dissipation channel from the upper space of the battery module 3, so that mixed flow is not easy to occur, so that the heat dissipation channel acts as a wind guide; in addition, the separator 6 can also guide the air flow to the outlet. The air outlet 5 makes the wind flow in the cooling passage more smooth.

Preferably, the battery case 1 includes a lower casing 11, a side casing 12 and an upper casing 13, the lower casing 11 and the side casing 12 are integrally constructed, and the upper casing 13 is tightly connected to the On the side shell 12 of the box, the upper shell 13 of the box makes the battery box 1 form a relatively airtight space, and it can also be regarded as a large air duct. When the air outlet 5 is drawn, the battery box 1 Negative pressure is formed inside, which can accelerate the entry of cold air, increase the flow rate of wind in the heat dissipation channel, and take away the heat generated by the battery module 3 more quickly, so that the temperature of the battery module 3 can be effectively controlled and the work of the battery module 3 can be improved. Environment, improve the safety performance of the battery module 3 work.

Both the box lower shell 11 and the box upper shell 13 are provided with reinforcing lugs 111, and the reinforcing lugs 111 play a role in increasing the strength of the box lower shell 11 and the box upper shell 13, and the reinforcing lugs 111 are arranged in a square structure.

Preferably, the number of fixed beams 2 is set to three, wherein two fixed beams 2 are respectively arranged at the junction of the box lower shell 11 and the box side shell 12, and the other one is set at the middle of the box lower shell 11, And the two ends are respectively connected with the box side shell 12 . The arrangement of the three fixing beams 2 can make the battery module 3 be installed in the battery case 1 reasonably and tightly, and can also form a special heat dissipation channel.

Preferably, the air inlet 4 communicates with the fixed beam 2 through the air guide 7. The air inlet 4 of the utility model is a round pipe, and the round pipe and the air guide 7 are vertically arranged, and the air guide 7 is a circular arc. The bell mouth can guide the air flow from the vertical direction to the horizontal direction. In addition, the air inlet 4 is also connected with an air supply device (not shown), which is conducive to the rapid air supply of the utility model, thereby improving the heat dissipation effect of the utility model. The air outlet 5 is connected with an exhaust device (not shown in the figure). Through the combined use of the exhaust device and the air supply device, the flow of cold air in the heat dissipation channel is accelerated, and the heat dissipation is more effectively improved; in addition, a The fan 51 plays the same role as the exhaust device, which makes the structure of the present utility model simpler.

Preferably, the battery module 3 includes a plurality of batteries (not shown in the figure), an end plate 31 and a surrounding plate 32, the end plate 31 and the surrounding plate 32 surround the plurality of batteries, and the bottom ends of the end plate 31 are provided with raised portions 33, so that the bottom of the battery module 3 is in a suspended state, which is conducive to the formation of heat dissipation channels; the surrounding plate 32 is made of materials with excellent thermal conductivity (such as aluminum, iron, steel, etc.), and the surrounding plate 32 is set as "U" Shaped structure, and closely connected with multiple batteries through thermal glue paste, without gaps, and finally form a large-area heat dissipation structure.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also change and modify the above embodiment. Therefore, the utility model is not limited to the above specific implementation manners, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the utility model shall belong to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (10)

1. A heat dissipation structure for a battery box, characterized in that: it includes a battery box, a fixed beam, a battery module, an air inlet and an air outlet, the fixed beam is arranged in the battery box, and a plurality of the battery modules tightly fixed on the fixed beam in turn, and a plurality of the battery modules are filled in the battery box, the fixed beam is set as a hollow structure, the fixed beam is provided with ventilation holes, and the air inlet Through the communication between the fixed beam and the air outlet, the air inlet, the fixed beam, the battery module, the battery box and the air outlet form a heat dissipation channel. 2 . The heat dissipation structure of the battery box according to claim 1 , further comprising a partition, the partition is welded to the fixed beam, and the partition is in close contact with the battery module. 3 . 3. The heat dissipation structure of the battery box according to claim 2, characterized in that: the separator is arranged in an "L" shape or a "1" shape. 4. The heat dissipation structure of the battery box according to claim 1, characterized in that: the battery box comprises a box lower shell, a box side shell, and a box upper shell, and the box lower shell and the box body The side shell is an integral structure, and the upper shell of the box body is tightly covered on the side shell of the box body. 5 . The heat dissipation structure of the battery box according to claim 4 , characterized in that: both the lower casing of the box and the upper casing of the box are provided with reinforcing bumps, and the reinforcing bumps are arranged in a square structure. 6 . 6. The heat dissipation structure of the battery box according to claim 4, characterized in that: the number of the fixed beams is set to three, and two of the fixed beams are respectively arranged on the lower shell of the box body and the box body As for the connection of the side shells, another one is arranged in the middle of the lower shell of the box body, and the two ends are respectively connected with the side shells of the box body. 7 . The heat dissipation structure of the battery box according to claim 1 , wherein the air inlet communicates with the fixed beam through a deflector, and the air inlet communicates with an air supply device. 8 . 8. The heat dissipation structure of the battery box according to claim 1, characterized in that: said air outlet is connected with a draft device. 9. The heat dissipation structure of the battery box according to claim 1, wherein a fan is provided at the position of the air outlet. 10. The heat dissipation structure of the battery box according to claim 1, wherein the battery module includes a plurality of batteries, an end plate and a surrounding plate, and the end plate and the surrounding plate surround a plurality of batteries, so Both ends of the bottom of the end plate are provided with protrusions, and the surrounding plate is arranged in a “U” shape and is closely connected with a plurality of the batteries.