CN205028956U - Battery package and battery flat - Google Patents

Abstract

The utility model provides a battery pack and a battery compartment. The battery pack includes: a battery box; at least one battery module housed in the battery box, and each battery module includes at least one single battery. The battery box is completely closed and at least one wall of the battery box is a heat-conducting wall. The battery pack also includes: a heat conduction layer, housed in the battery box, located between one side of the corresponding battery module and the heat conduction wall of the battery box and in contact with the side of the corresponding battery module and the heat conduction wall of the battery box, The heat generated by the corresponding battery module is conducted to the heat conduction wall of the battery box through the heat conduction layer, and then exchanges heat with the cooling gas outside the battery box through the heat conduction wall of the battery box. The battery compartment includes: a compartment shell for accommodating at least one of the aforementioned battery packs, and having an air inlet for cooling gas to enter and an air outlet for heat-exchanged gas to discharge. The battery pack and the battery compartment of the utility model can effectively reduce the temperature in the battery pack, and at the same time, have good sealing performance and avoid pollution of the battery module.

Description

Battery pack and battery compartment

technical field

The utility model relates to the field of batteries, in particular to a battery pack and a battery compartment.

Background technique

Referring to FIG. 1 and FIG. 2 , a common battery pack P on the market now integrates main air-cooled components (such as an axial fan, a filter, and an air duct) inside the battery pack P. Because the battery pack P integrates these air-cooled components inside, this electric box has the following disadvantages: a) the battery pack P is relatively large; b) the IP rating of the battery pack P cannot reach the IP67 level; c) A filter must be added to prevent dust, oil, wool and other dirt from the wind source from entering the electric box; d) Due to the low IP level of the battery pack P, it cannot be dustproof and waterproof, which limits the use of the battery pack P on the entire vehicle The location of the layout affects the application range of the battery pack P; e) The cleanliness of the air source is not high, because the current common cooling air comes from the ambient air of the vehicle and the air in the passenger compartment of the vehicle, which is also the setting of the filter component One of the reasons; f) The filter screen needs to be cleaned and maintained regularly to ensure the cleanliness and cooling effect in the battery pack P. The maintenance cycle is about two to three months, and the maintenance cost is relatively high.

Utility model content

In view of the problems in the background technology, the purpose of this utility model is to provide a battery pack and a battery compartment, which can effectively reduce the temperature inside the battery pack, and at the same time have good sealing performance and avoid pollution of the battery module.

In order to achieve the above object, in a first aspect, the utility model provides a battery pack, which includes: a battery box; and at least one battery module housed in the battery box, each battery module includes at least one single battery. The battery box is completely closed and at least one wall of the battery box is a heat-conducting wall. The battery pack also includes: a heat conduction layer, housed in the battery box, located between one side of the corresponding battery module and the heat conduction wall of the battery box and in contact with the side of the corresponding battery module and the heat conduction wall of the battery box, The heat generated by the corresponding battery module is conducted to the heat conduction wall of the battery box through the heat conduction layer, and then exchanges heat with the cooling gas outside the battery box through the heat conduction wall of the battery box.

In order to achieve the above object, in the second aspect, the utility model provides a battery compartment, which includes: a compartment shell, which accommodates at least one battery pack described in the first aspect, and is provided with an air inlet for cooling gas to enter and a replacement The air outlet through which the heated gas is discharged.

The beneficial effects of the utility model are as follows:

In the battery pack according to the present invention, the heat generated by the battery module is conducted to the heat-conducting wall of the battery box through the heat-conducting layer, and then exchanges heat with the cooling gas outside the battery box through the heat-conducting wall of the battery box, which can effectively reduce the temperature of the battery pack. to avoid high temperature alarms and safety accidents caused by the heat accumulation of the internal battery module, and prolong the service life of the single battery; at the same time, the battery module is completely enclosed inside the battery box and does not come into contact with the external cooling gas to prevent Dust, oil, wool and other sundries in the cooling gas enter the battery box to avoid pollution of the battery module.

Description of drawings

FIG. 1 is a perspective view of an existing battery pack;

Fig. 2 is a sectional view of an existing battery pack;

Fig. 3 is a sectional view of the battery pack according to the present invention;

Fig. 4 is a perspective view of the connection between the single battery and the heat conduction wall of the battery pack according to the present invention;

Fig. 5 is a perspective view of the battery box of the battery pack according to the present invention;

Fig. 6 is a perspective view of an embodiment of the middle layer of the battery pack according to the present invention;

7 is a perspective view of another embodiment of the middle layer of the battery pack according to the present invention;

Fig. 8 is a perspective view of another embodiment of the middle layer of the battery pack according to the present invention.

Wherein, the reference signs are explained as follows:

P battery pack 32 middle layer

1 battery box 321 opening

11 heat conduction wall 322 notches

111 heat dissipation rib 33 outer heat conduction layer

2 battery modules 4 cabin shells

21 single battery 41 air inlet

3 heat conduction layer 42 air outlet

31 Inner heat conduction layer

detailed description

The battery pack and the battery compartment of the present invention will be described in detail below with reference to the accompanying drawings.

First, the battery pack according to the first aspect of the present invention will be described. Referring to FIGS. 3 to 8 , it is illustrated that the battery pack P according to the present invention includes: a battery box 1 ; and at least one battery module 2 housed in the battery box 1 , each battery module 2 includes at least one single battery 21 . The battery box 1 is completely closed and at least one wall of the battery box 1 is a heat conducting wall 11 . The battery pack P also includes: a heat conduction layer 3, housed in the battery box 1, located between the side corresponding to the battery module 2 and the heat conduction wall 11 of the battery box 1, and connected to the side corresponding to the battery module 2 and the heat conduction wall 11 of the battery box 1. The heat conduction wall 11 of the battery box 1 is in contact, so that the heat generated by the corresponding battery module 2 is conducted to the heat conduction wall 11 of the battery box 1 through the heat conduction layer 3 , and then through the heat conduction wall 11 of the battery box 1 and the cooling outside the battery box 1 The gas is heat exchanged.

In the battery pack P according to the present utility model, the heat generated by the battery module 2 is conducted to the heat conduction wall 11 of the battery box 1 through the heat conduction layer 3 , and then the heat conduction wall 11 of the battery box 1 is exchanged with the cooling gas outside the battery box 1. Heat exchange can effectively reduce the temperature inside the battery pack P, avoid high temperature alarms and safety accidents caused by the heat accumulation of the internal battery module 2, and prolong the service life of the single battery 21; at the same time, the battery module 2 is completely enclosed in the battery box The inside of the battery box 1 is not in contact with the cooling gas from the outside, so as to prevent dust, oil, wool and other sundries in the cooling gas from entering the battery box 1, and avoid pollution of the battery module 2.

In the battery pack P according to the present invention, in an embodiment, the heat conducting wall 11 of the battery box 1 can be made of metal. The metal can be sheet metal or cast aluminum alloy. The thermal conductivity coefficient of aluminum is 10 times that of sheet metal, so the heat dissipation capacity of the heat conduction wall 11 made of cast aluminum alloy is higher than that of sheet metal, so cast aluminum alloy is preferred.

In the battery pack P according to the present invention, referring to FIG. 5 , in one embodiment, the heat conduction wall 11 of the battery box 1 may have a plurality of cooling ribs 111 on the side contacting the cooling gas. The heat dissipation ribs 111 can increase the heat dissipation area of the heat conduction wall 11 and improve the heat dissipation capacity of the heat conduction wall 11 .

In the battery pack P according to the present invention, referring to FIG. 4 , in one embodiment, the heat conduction layer 3 includes: an inner heat conduction layer 31 fixed on the side corresponding to the battery module 2; an intermediate layer 32 fixed inside outside the heat conducting layer 31 ; and the outer heat conducting layer 33 is fixed between the middle layer 32 and the heat conducting wall 11 of the battery box 1 .

In the battery pack P according to the present invention, in one embodiment, the inner heat conduction layer 31 can be a heat conduction silicone pad or a liquid cured heat conduction glue.

In the battery pack P according to the present invention, in one embodiment, the middle layer 32 can be made of heat-conducting aluminum plate.

In the battery pack P according to the present invention, referring to FIG. 6 to FIG. 8 , in one embodiment, the cross section of the middle layer 32 has an opening 321 in the periphery of the cross section or a notch 322 in the periphery. The opening 321 or the notch 322 can reduce the weight of the intermediate layer 32 .

In the battery pack P according to the present invention, in one embodiment, the outer heat conduction layer 33 can be a heat conduction silicone pad or a liquid cured heat conduction glue.

In the battery pack P according to the present utility model, in one embodiment, the cooling gas can be the air conditioner wind of the electric vehicle, the air in the passenger compartment of the electric vehicle or the external ambient air of the electric vehicle

In the battery pack P according to the present invention, in an embodiment, the cooling gas may be the air conditioner of an electric vehicle. The air-conditioning air of electric vehicles comes directly from the air-conditioning cold air duct of the whole vehicle, which has high cleanliness and can effectively control the temperature, so the air-conditioning air is preferred.

In the battery pack P according to the present invention, in one embodiment, the battery box 1 can be arranged above the cabin, below the cabin or in the rear space of the electric vehicle. If required by the vehicle design, the battery box 1 can also be arranged in other positions.

In the battery pack P according to the present invention, in one embodiment, the heat conduction wall 11 is the bottom wall of the battery box 1 . The bottom wall is convenient for installing and fixing the battery module 2, and has high heat dissipation performance.

Next, the battery compartment according to the second aspect of the present invention will be described.

The battery compartment according to the second aspect of the present invention includes: a compartment shell 4 for accommodating at least one of the aforementioned battery packs P, and is provided with an air inlet 41 for the cooling gas to enter and an air outlet 42 for the heat-exchanged gas to discharge.

Claims (10)

1. a power brick (P), comprising:

Battery case (1); And

At least one battery modules (2), be contained in battery case (1), each battery modules (2) comprises at least one cell (21);

It is characterized in that,

Battery case (1) closes completely and at least one wall of battery case (1) is heat conducting wall (11);

Described power brick (P) also comprises:

Heat-conducting layer (3), be contained in battery case (1), to be positioned between the side of corresponding battery modules (2) and the heat conducting wall (11) of battery case (1) and to contact with the heat conducting wall (11) of battery case (1) with this side of corresponding battery modules (2), the heat produced to make this corresponding battery modules (2) via heat-conducting layer (3) be transmitted to battery case (1) heat conducting wall (11), carry out heat exchange via the heat conducting wall (11) of battery case (1) with battery case (1) refrigerating gas outward again.

2. power brick according to claim 1 (P), is characterized in that, the heat conducting wall (11) of battery case (1) has multiple cooling fin (111) in the side contacted with refrigerating gas.

3. power brick according to claim 1 (P), is characterized in that, heat-conducting layer (3) comprising:

Interior heat-conducting layer (31), is fixed on this side of corresponding battery modules (2);

Intermediate layer (32), is fixed on interior heat-conducting layer (31) outward; And

Outer heat-conducting layer (33), between the heat conducting wall (11) being fixed on intermediate layer (32) and battery case (1).

4. power brick according to claim 3 (P), is characterized in that, interior heat-conducting layer (31) is thermal conductive silicon rubber cushion or liquid curing heat-conducting glue.

5. power brick according to claim 3 (P), is characterized in that, outer heat-conducting layer (33) is thermal conductive silicon rubber cushion or liquid curing heat-conducting glue.

6. power brick according to claim 3 (P), is characterized in that, intermediate layer (32) are made up of aluminum heat conducting plate.

7. power brick according to claim 3 (P), is characterized in that, the cross section of intermediate layer (32) has the opening (321) being positioned at section peripheral or the recess (322) being in peripheral region.

8. power brick according to claim 1 (P), is characterized in that, refrigerating gas is electric automobile air conditioner wind, electric automobile passenger compartment air or electric automobile ambient air outside.

9. the power brick (P) according to any one of claim 1-8, is characterized in that, the diapire that heat conducting wall (11) is battery case (1).

10. a battery flat, is characterized in that, comprising:

Cabin shell (4), the quantity of collecting according to any one of claim 1-9 is the power brick (P) of at least one, is provided with the air intake vent (41) entered for refrigerating gas and the air outlet (42) of discharging for the gas after heat exchange.