CN207441811U - Babinet and battery pack - Google Patents

Abstract

The utility model provides a box body and a battery pack. The box body includes: a lower box body; an upper cover, which is closed on the lower box body to form a storage cavity, and the upper cover has an upper wall and a top wall. The box body also includes at least one condensing assembly, and each condensing assembly includes: a condensing sheet, embedded in one of the upper upper wall of the upper cover and the lower box body, having an inner surface exposed to the receiving cavity and an outer surface exposed to the box body , the water vapor in the storage chamber is condensed into liquid water on the condensing sheet prior to the upper cover and the lower box; the water storage box is located under the condensing sheet, and the upper end facing the condensing sheet is provided with a water inlet to condense the liquid state of the condensing sheet Water collects in the water storage box. The battery pack includes at least one battery module, and the battery pack also includes the above-mentioned case, the at least one battery module is fixed to the lower case and accommodated in the lower case and the upper cover. The condensing assembly effectively prevents water vapor from forming condensed water on the top wall of the upper cover of the box body.

Description

Case and battery pack

technical field

The utility model relates to the battery field, in particular to a box body and a battery pack.

Background technique

As the core part of new energy vehicles, power batteries are of utmost importance for their safety and reliability. During long-term use, water vapor will enter the inside of the battery box from some parts such as the balance valve, and condensed water will be generated inside, which will cause problems such as circuit short circuit and metal parts corrosion. At present, the technical means to solve the condensed water inside the battery box are mainly to place a desiccant such as silica gel, and to design a ventilation unit. This technical solution mainly has the following problems. The desiccant has moisture absorption saturation and cannot achieve long-term moisture absorption function. After the desiccant fails, the battery system still has the problem of water vapor condensing into condensed water.

Utility model content

In view of the problems existing in the background technology, the purpose of this utility model is to provide a box and a battery pack, which can reduce the humidity in the box, and prevent the desiccant in the prior art from reaching moisture absorption saturation and cannot continue to desiccant in the box. The defect of moisture absorption by water vapor prevents water vapor from forming condensed water on the top wall of the upper cover of the box, thereby reducing the probability of failure of the battery pack.

In order to achieve the above object, in the first aspect, the utility model provides a box body, which includes: a lower box body; . The box body also includes at least one condensing assembly, and each condensing assembly includes: a condensing sheet, embedded in one of the upper upper wall of the upper cover and the lower box body, having an inner surface exposed to the receiving cavity and an outer surface exposed to the box body , the water vapor in the storage chamber is condensed into liquid water on the condensation sheet prior to the upper cover and the lower box body; the water storage box is located under the condensation sheet, and the upper end facing the condensation sheet is provided with a water inlet to condense the condensation sheet. Water collects in the water storage box.

In order to achieve the above object, in the second aspect, the utility model provides a battery pack, including at least one battery module, and the battery pack also includes the box body according to the first aspect of the utility model, and the at least one battery module The group is fixed on the lower box body and accommodated in the lower box body and the upper cover.

The beneficial effects of the utility model are as follows:

When the box of the utility model is used for a battery pack, the condensing component can effectively avoid the defect that the desiccant in the prior art reaches moisture absorption saturation and cannot continue to absorb moisture in the box while reducing the humidity in the box , effectively preventing water vapor from forming condensed water on the top wall of the upper cover of the box body, reducing the probability of failure of the battery pack.

Description of drawings

Fig. 1 is a cross-sectional view of a box body according to the present invention.

FIG. 2 is an enlarged view of a circled portion in FIG. 1 .

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

Wherein, the reference signs are explained as follows:

1 lower box 312 cooling protrusion

11 Lower peripheral wall F1 inner surface

12 Bottom wall F2 outer surface

2 upper cover 32 water storage box

21 upper wall 321 water inlet

22 top wall 33 drain valve

3Condenser assembly S storage chamber

31 condenser sheets M battery module

311 Body

Detailed ways

The box body and the battery pack according to the present invention will be described in detail below with reference to the accompanying drawings.

Firstly, the box body according to the first aspect of the present utility model will be described.

Referring to Fig. 1 to Fig. 2 in combination with Fig. 3, the box body according to the present utility model includes: a lower box body 1; and top wall 22 . The box body also includes at least one condensing assembly 3, and each condensing assembly 3 includes: a condensing sheet 31, embedded on one of the upper wall 21 of the upper cover 2 and the lower box body 1, having an inner surface F1 exposed to the receiving chamber S and Exposed to the outer surface F2 outside the box, the water vapor in the storage chamber S is condensed into liquid water on the condensation sheet 31 prior to the upper cover 2 and the lower box body 1; the water storage box 32 is located below the condensation sheet 31 and faces the A water inlet 321 is provided on the upper surface of the condensation sheet 31 to collect the liquid water condensed by the condensation sheet 31 into the water storage box 32 .

In the box body according to the first aspect of the utility model, the thermal conductivity of the condensation sheet 31 of the condensation assembly 3 is greater than the thermal conductivity of the upper cover 2 and the thermal conductivity of the lower box 1 and the heat capacity of the condensation sheet 31 is smaller than that of the upper cover 2 The heat capacity and the heat capacity of the lower box body 1, so that the condensation assembly 3 can make the water vapor in the storage chamber S condense into liquid water on the condensation sheet 31 prior to the upper cover 2 and the lower box body 1, and at the same time collect the liquid water into the water storage box 32, thereby effectively avoiding water vapor from forming condensed water on the inner surface of the box except for the condensation sheet 31, and avoiding that the desiccant in the prior art reaches moisture absorption saturation and cannot continue to cool the box. The water vapor in the body absorbs moisture; in addition, the structure of the condensation assembly 3 is simple, which saves the manufacturing cost.

The condensation sheet 31 can be made of any known material, and can also be in the form of a condenser (that is, a heat exchange medium circulates inside the condensation sheet 31 ). Preferably, in terms of material, the thermal conductivity of the condensation sheet is greater than the thermal conductivity of the upper cover 2 and the lower box 1 while the heat capacity of the condensation sheet 31 is smaller than the heat capacity of the upper cover 2 and the lower box 1 .

The lower case 1 has a lower peripheral wall 11 and a bottom wall 12 .

In order to drain the liquid water condensed by the condensing sheet 31 out of the box in time, each condensing assembly 3 further includes: a drain valve 33 , which is installed on the upper cover or the lower box and communicated with the water storage box 32 .

Specifically, as shown in FIG. 2 , the condensation sheet 31 includes: a main body portion 311 embedded in one of the upper peripheral wall 21 of the upper cover 2 and the lower peripheral wall 11 of the lower box 1, and the inner surface F1 of the main body portion 311 is exposed. In the receiving cavity S, the outer surface F2 of the main body portion 311 is exposed outside the box. It should be noted that a plurality of condensation fins 31 can be arranged on the upper peripheral wall 21 of the upper cover 2; they can also be arranged on the lower peripheral wall 11 of the lower box 1; On the lower peripheral wall 11 of the lower box body 1. Preferably, at least one condensation sheet 31 is disposed on the upper wall 21 of the upper cover 2 , so as to effectively prevent water vapor from forming condensed water on the top wall 22 of the upper cover 2 .

The inner surface F1 of the body portion 311 is coplanar with the inner surface of the one of the upper peripheral wall 21 of the upper cover 2 and the lower peripheral wall 11 of the lower case 1 . Of course, it is not limited thereto, and the inner surface F1 of the main body portion 311 may also protrude from the inner surface of the one of the upper peripheral wall 21 of the upper cover 2 and the lower case 1 .

The cooling fin 31 further includes: a plurality of heat dissipation protrusions 312 connected to the main body 311 and protruding from the outer surface F2 of the main body 311 to the outside of the box. The heat dissipation protrusion 312 increases the contact area with the external environment, and further promotes the heat exchange between the cooling fin 31 and the external environment.

The condensation sheet 31 is made of a material with high thermal conductivity and low heat capacity, so that the heat exchange rate between the condensation sheet 31 and the external environment of the box is fast, and the temperature change is also fast, and the effect of rapid cooling can be realized by itself. Preferably, the material of the condensation sheet 31 for copper or aluminum. The lower box body 1 and the upper cover 2 can be sheet metal parts, and can also be made of organic mixed materials. These materials have poor thermal conductivity and slow temperature change speed. Therefore, when the box body is in an external low temperature environment, the condensation sheet 31 can Lower the temperature of the lower box 1 and the upper cover 2 to below the dew point, so that the water vapor can be condensed on the condensation sheet 31 first, so as to reduce the humidity in the box and prevent the water vapor from generating condensed water on the top wall 22 of the upper cover 2 And cause short circuit and corrosion problems to the conductive parts inside the box. The lower box body 1 is made of steel, glass fiber reinforced thermosetting resin composite material or glass fiber reinforced thermoplastic resin composite material. The upper cover 2 is made of steel, glass fiber reinforced thermosetting resin composite material or glass fiber reinforced thermoplastic resin composite material.

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

Referring to FIG. 3 , the battery pack according to the present invention includes at least one battery module M, and the battery pack also includes the box according to the first aspect of the present invention, and the at least one battery module M is fixed to the lower box 1 And accommodated in the lower box 1 and the upper cover 2.

The battery pack of the utility model adopts the box body according to the first aspect of the utility model, which can effectively prevent water vapor from generating condensed water on the top wall 22 of the upper cover 2 of the box body and dripping onto the battery module Cause the problems of short circuit and corrosion, and achieve the effect of reducing the humidity in the box.

Claims (10)

1. A casing, comprising: lower box (1); The upper cover (2), which is closed to the lower box (1) to form a storage cavity (S), the upper cover (2) has an upper wall (21) and a top wall (22); It is characterized in that the box body also includes at least one condensing assembly (3), and each condensing assembly (3) includes: Condensation sheet (31), is embedded on the last week wall (21) of loam cake (2) and on one of lower case body (1), has the inner surface (F1) that is exposed to accommodating chamber (S) and is exposed to case body On the outer surface (F2), the water vapor in the storage chamber (S) is condensed into liquid water on the condensation sheet (31) prior to the upper cover (2) and the lower box (1); The water storage box (32) is positioned under the condensation sheet (31), and the upper end facing the condensation sheet (31) is provided with a water inlet (321) to collect the liquid water condensed by the condensation sheet (31) into the water storage box ( 32) inside. 2. The box according to claim 1, characterized in that the lower box (1) has a lower peripheral wall (11) and a bottom wall (12). 3. The casing according to claim 1, characterized in that each condensing assembly (3) further comprises: The drain valve (33) is passed through the upper cover or the lower box body and communicated with the water storage box (32). 4. The casing according to claim 2, characterized in that, The condensation sheet (31) includes: a body part (311), embedded in one of the upper peripheral wall (21) of the loam cake (2) and the lower peripheral wall (11) of the lower box (1), the body part (311) The inner surface (F1) of the body part (311) is exposed to the receiving chamber (S) and the outer surface (F2) of the body part (311) is exposed to the outside of the box. 5. The box according to claim 4, characterized in that, the inner surface (F1) of the main body (311) is in contact with the upper wall (21) of the upper cover (2) and the lower wall of the lower box (1) The inner surfaces of said one of (11) are coplanar. 6. The casing according to claim 4, characterized in that the condensation sheet (31) also comprises: A plurality of heat dissipation protrusions (312) are connected to the main body (311) and protrude from the outer surface (F2) of the main body (311) to the outside of the box. 7. The box body according to claim 1, characterized in that, The cooling sheet (31) is made of copper or aluminum. 8. The box according to claim 1, characterized in that the material of the lower box (1) is steel, glass fiber reinforced thermosetting resin composite material or glass fiber reinforced thermoplastic resin composite material. 9. The box body according to claim 1, characterized in that the upper cover (2) is made of steel, glass fiber reinforced thermosetting resin composite material or glass fiber reinforced thermoplastic resin composite material. 10. A battery pack, comprising at least one battery module (M), characterized in that the battery pack further comprises the casing according to any one of claims 1-9, the at least one battery module (M) ) is fixed to the lower box (1) and accommodated in the lower box (1) and the upper cover (2).