CN106711539A - Battery pack and vehicle with it - Google Patents

Abstract

The invention discloses a battery pack and a vehicle with it. The battery pack includes: a box body, the box body has a top opening, and the box body is provided with a low-voltage interface, a high-voltage positive interface, a high-pressure negative interface and an explosion-proof valve; a cover plate, the cover plate is arranged on the box body the top of the top and close the top opening; the battery module, the battery module is arranged inside the box, and a cooling air duct is formed in the battery module; the air inlet and the air outlet, the air inlet and the air outlet The air outlets are respectively arranged on the box body, and the outer surfaces of the air inlet and the air outlet are respectively provided with waterproof and breathable structures; and a wind circulation device, the wind circulation device is arranged on the air inlet and the air outlet At the air outlet. The battery pack according to the embodiment of the present invention has good dustproof and waterproof performance, and the air circulation device accelerates the circulation of cold air, thereby improving the heat dissipation efficiency of the battery module.

Description

Battery pack and vehicle having it

technical field

The present invention relates to the field of automobiles, in particular to a battery pack and a vehicle with it.

Background technique

The dustproof and waterproof performance of the air inlet and outlet of the air-cooled battery pack in the prior art cannot reach a relatively safe level. If the battery pack enters water, it will cause a short circuit of the battery in the battery pack and the failure of the battery protection system. , causing more serious accidents such as battery fire, vehicle fire, etc.

The position design of the air inlet and outlet of the battery pack of the current technology and the design of the cooling air duct of the battery inside the battery pack are unreasonable, which will seriously affect the heat dissipation effect of the battery.

Contents of the invention

The present invention aims to solve one of the above-mentioned technical problems in the prior art at least to a certain extent. For this reason, an object of the present invention is to propose a battery pack, which has good dustproof and waterproof performance, and is designed with a reasonable air inlet, air outlet position and cooling air duct arrangement, which improves the performance of the battery pack. cooling efficiency.

Another object of the present invention is to provide a vehicle with the above battery pack.

The battery pack according to the embodiment of the present invention includes: a box body, the box body has a top opening, and the box body is provided with a low-pressure port, a high-voltage positive port, a high-voltage negative port, and an explosion-proof valve; a cover plate, the cover plate is provided with on the top of the box and close the top opening; a battery module, the battery module is arranged inside the box, and a cooling air duct is formed in the battery module; an air inlet and an air outlet, the The air inlet and the air outlet are respectively arranged on the box body, and the outer surfaces of the air inlet and the air outlet are respectively provided with waterproof and breathable structures; and a wind circulation device, the wind circulation device is arranged on the The air inlet and the air outlet.

The battery pack according to the embodiment of the present invention has good dustproof and waterproof performance, and the air circulation device accelerates the circulation of cold air, thereby improving the heat dissipation efficiency of the battery module.

In addition, the battery pack according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to some embodiments of the present invention, the air inlet and the air outlet are respectively formed on two opposite or adjacent side walls of the box.

According to some embodiments of the present invention, the installation height of the air inlet is lower than the installation height of the air outlet.

According to some embodiments of the present invention, the battery module includes: a plurality of juxtaposed battery units, the battery units include a body part, an upper flange part and a lower flange part, and the upper flange part is arranged on the The upper end of the body part protrudes from the two sides of the body part to both sides respectively, and the lower flange part is arranged on the lower end of the body part and protrudes from the two sides of the body part to both sides respectively. The upper flanges of two adjacent battery cells abut and the lower flanges of two adjacent battery cells abut against each other, forming a gap between the body parts of two adjacent battery cells the cooling air duct.

According to some embodiments of the present invention, the cooling air duct extends along the height direction of the box body, and is formed as a through-type air duct in a direction from the air inlet to the air outlet.

According to some embodiments of the present invention, the waterproof and gas-permeable structure includes: a substrate, on which a plurality of grids are formed, and a waterproof and gas-permeable membrane is arranged on the grids.

According to some embodiments of the present invention, the upper left corner and the upper right corner of the box are respectively formed with an upper left concave portion and an upper right concave portion, and a high voltage The positive interface and the other are provided with a high voltage negative interface on the upper surface. According to some embodiments of the present invention, the box has a front wall, a lower portion of the front wall is recessed backward to form a front wall recess, and the air inlet is formed on the front wall recess.

The above-mentioned battery pack further includes: a decorative plate, the decorative plate is arranged in the concave portion of the front wall and covers the air inlet, the decorative plate is provided with a decorative plate air channel, and the decorative plate air channel connects the The air inlet communicates with the external environment, the air channel of the decorative panel is formed on the rear surface of the decorative panel, the upper end of the air channel of the decorative panel communicates with the air inlet and the lower end extends to the lower edge of the decorative panel .

A vehicle according to another embodiment of the present invention includes the battery pack of the above embodiment.

Description of drawings

1 is a schematic diagram of a battery pack according to an embodiment of the present invention;

Fig. 2 is the schematic diagram of casing;

Fig. 3 is a schematic diagram of the position of the battery module in the box;

4 is a schematic diagram of a battery module;

Fig. 5 is a schematic diagram of the flow direction of the cold wind;

Fig. 6 is a schematic diagram of the waterproof and breathable structure.

Reference signs:

Battery pack 10, box body 1, upper left recess 11, high-voltage negative port 111, explosion-proof valve 112, upper right recess 12, low-voltage port 121, high-voltage positive port 122, front wall 13, front wall recess 131, cover plate 2, Battery module 3, battery unit 31, body part 311, upper flange part 312, lower flange part 313, middle flange part 314, cooling air duct 32, air inlet 4, air outlet 5, air circulation device 6, waterproof Breathable structure 7 , base plate 71 , grid 72 , decorative plate 8 .

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The battery pack 10 according to the embodiment of the present invention will be described in detail below with reference to FIGS. 1-6 .

Referring to FIG. 1 and FIG. 2 , a battery pack 10 according to an embodiment of the present invention may include a box body 1 , a cover plate 2 , a battery module 3 , an air inlet 4 , an air outlet 5 and an air circulation device 6 .

The box body 1 has a top opening through which the battery module 3 can be placed inside the box body 1 , as shown in FIG. 3 . In a specific embodiment, the box body 1 can be integrally formed by sheet metal materials, or integrally formed by plastic materials. The integral molding process can greatly simplify the manufacturing process of the box body 1, and can also significantly save production costs in mass production. .

Referring to Figure 2, the box body 1 is provided with a low-pressure port 121, a high-pressure positive port 122, a high-pressure negative port 111, and an explosion-proof valve 112, and the low-pressure port 121, the high-pressure positive port 122, the high-pressure negative port 111, and the explosion-proof valve 112 are symmetrically distributed. on both sides of box 1.

The cover plate 2 is arranged on the top of the box body 1 and is used to close the top opening of the box body 1, thereby preventing debris from falling into the box body 1 and damaging the battery module 3, and at the same time preventing the battery module 3 from being directly exposed It is bumped outside, in other words, the cover plate 2 enhances the protective effect on the battery module 3 .

Referring to Fig. 3 and Fig. 4, the battery module 3 is arranged inside the box body 1, and a cooling air duct 32 is formed in the battery module 3, and the cooling air duct 32 increases the contact area between the battery module 3 and the cold air, thereby It is beneficial to dissipate the heat of the battery module 3 as soon as possible. The cold air entering the box body 1 from the air inlet 4 will pass through the cooling air duct 32 , and during this process, the cold air will exchange heat with the battery module 3 , thereby achieving the purpose of cooling the battery module 3 .

As shown in FIG. 2 , the air inlet 4 and the air outlet 5 are respectively arranged on the box body 1 , and cold air enters the box body 1 from the air inlet 4 and then goes out from the air outlet 5 . The outer surfaces of the air inlet 4 and the air outlet 5 are respectively provided with waterproof and breathable structures 7, so that the waterproof and breathable structures 7 are located on the outer surfaces of the air inlet 4 and the air outlet 5, so replacement is also convenient.

With reference to shown in Figure 6, waterproof breathable structure 7 can comprise substrate 71, and substrate 71 is provided with a plurality of grids 72, and waterproof breathable membrane (not shown) can be set at grid 72 places, and waterproof breathable membrane has good waterproof Dust and waterproof performance, it can allow air to pass through, but prevent water vapor or water droplets from passing through, so the waterproof and breathable structure 7 allows cold wind to enter the interior of the box body 1 to take away the heat of the battery module 3, but can effectively prevent external water vapor or water droplets from entering The inside of the box body 1 damages the battery module 3 . It should be noted that the waterproof and gas-permeable membrane is an existing technology and is well known to those skilled in the art, so the specific structure and composition of the waterproof and gas-permeable membrane will not be described in detail here.

In some preferred embodiments, a sealant can be used to paste and fix the waterproof and breathable structure 7 on the outer surfaces of the air inlet 4 and the air outlet 5 . The waterproof and breathable structure 7 has a better sealing effect on the air inlet 4 and the air outlet 5 , so that the dustproof and waterproof performance of the battery pack 10 can reach at least IP65.

The air circulation device 6 is arranged at the air inlet 4 and the air outlet 5 . The wind circulation device 6 can suck the outside air into the box body 1 from the air inlet 4, and can also extract the air inside the box body 1 to the outside of the box body 1 through the air outlet 5. At the same time, the wind circulation device 6 accelerates the circulation of cold wind, thereby This can dissipate the heat of the battery module 3 as soon as possible, thereby improving the heat dissipation efficiency of the battery module 3 .

The battery pack 10 according to the embodiment of the present invention has good dustproof and waterproof performance, and the air circulation device 6 accelerates the circulation of cold air, thereby improving the heat dissipation efficiency of the battery module 3 and enhancing the heat dissipation effect of the battery module 3 .

In the specific embodiment shown in FIG. 2 , the air inlet 4 and the air outlet 5 are respectively arranged on two opposite side walls of the box body 1 . Since the cold air will take away the heat of the battery module 3 and become hot air, the temperature of the air outlet 5 will be higher than the temperature of the air inlet 4, and the density of hot air is less and easy to rise, so preferably, the air outlet 5 The installation height of the battery module 3 is higher than that of the air inlet 4, which conforms to the air circulation trend, thereby improving the heat dissipation efficiency of the battery module 3.

It should be pointed out that, in some optional embodiments, the air inlet 4 and the air outlet 5 can also be respectively arranged on two adjacent side walls of the box body 1 .

Referring to FIG. 4 , the battery module 3 may include a plurality of juxtaposed battery units 31 , and each battery unit 31 may include a body portion 311 , an upper flange portion 312 and a lower flange portion 313 .

Wherein, the upper flange portion 312 is arranged on the upper end of the body portion 311 and protrudes from the two sides of the body portion 311 to both sides respectively, and the lower flange portion 313 is arranged on the lower end of the body portion 311 and protrudes from the sides of the body portion 311 to both sides respectively. two sides. The upper flange portions 312 of the adjacent two battery cells 31 abut and the lower flange portions 313 of the adjacent two battery cells 31 abut against each other, so that there is a gap between the body portions 311 of the adjacent two battery cells 31 . A cooling air passage 32 is formed. When the cold air passes through the cooling air passage 32, it will take away part of the heat of the battery module 3, thereby reducing the temperature of the battery module 3 to a suitable working temperature range, thus prolonging the battery life. Service life of group 3.

In the specific example shown in FIG. 4 , each battery unit 31 further includes a middle flange portion 314 disposed in the middle of the body portion 311 and protruding from two sides of the body portion 311 to both sides. The middle flange parts 314 of two adjacent battery cells 31 contact each other to form cooling air between the upper flange part 312 and the middle flange part 314 and between the lower flange part 313 and the middle flange part 314. Road 32.

Further, the cooling air channel 32 extends along the height direction of the box body 1 and is formed as a through-type air channel in the direction from the air inlet 4 to the air outlet 5 . The flow direction of the cold air is shown in Figure 5. The cold air enters through the air inlet 4, then flows through the cooling air duct 32 passing through the battery module 3, exchanges heat with the battery module 3, and finally goes out through the air outlet 5, thereby bringing The excess heat of the battery module 3 is taken away.

Referring to Fig. 2, the upper left corner and the upper right corner of the box body 1 are respectively provided with an upper left recess 11 and an upper right recess 12, and one of the upper left recess 11 and the upper right recess 12 is provided with a high voltage positive interface 122 on the upper surface And the upper surface of the other is provided with a high-pressure negative port 111 . In the specific example shown in FIG. 2 , the upper surface of the upper left recess 11 is provided with a high voltage negative port 111 , and the upper surface of the upper right recess 12 is provided with a high voltage positive port 122 . In addition, an explosion-proof valve 112 is provided on the upper surface of the recess 11 in the upper left corner, and a low pressure port 121 is provided on the upper surface of the recess 12 in the upper right corner.

Preferably, the high-voltage positive port 122 is located outside the low-voltage port 121 , and the high-voltage negative port 111 is located outside the explosion-proof valve 112 , thereby facilitating the connection between the battery pack 10 and other parts of the vehicle.

Preferably, the upper left recess 11 and the upper right recess 12 are bilaterally symmetrical, the explosion-proof valve 112 is bilaterally symmetrical to the low pressure port 121 , and the high pressure positive port 122 is bilaterally symmetrical to the high pressure negative port 111 . The high-voltage negative interface 111 and the high-voltage positive interface 122 are distributed on both sides of the box body 1. This arrangement avoids the risk of a short circuit caused by tool contact between the high-voltage negative interface 111 and the high-voltage positive interface 122 during the installation process, thus improving the reliability of the battery pack. 10 safety features.

In some optional embodiments, the high-voltage negative port 111 can also be arranged on the upper surface of the upper right recess 12 , while the high-voltage positive port 122 is arranged on the upper surface of the upper left recess 11 . Of course, the explosion-proof valve 112 can also be arranged on the upper surface of the upper right recess 12 , and the low-pressure port 121 can also be arranged on the upper surface of the upper left recess 11 .

The box body 1 has a front wall 13 whose lower portion is recessed backward to form a front wall recess 131 . Optionally, the air inlet 4 is disposed on the concave portion 131 of the front wall.

The above-mentioned battery pack 10 may further include a decorative plate 8, which is disposed in the recessed portion 131 of the front wall and covers the air inlet 4. After the air inlet 4 is covered, the appearance of the battery pack 10 is more beautiful. Further, the decorative panel 8 is provided with a decorative panel air channel (not shown in the figure), and the decorative panel air channel communicates the air inlet 4 with the external environment, so that the cold air enters the air inlet 4 through the decorative panel air channel, and then passes through the air inlet 4. The tuyere 4 enters the inside of the box body 1 .

Preferably, the decorative panel air channel is arranged on the rear surface of the decorative panel 8, the upper end of the decorative panel air channel communicates with the air inlet 4 and the lower end extends to the lower edge of the decorative panel 8, so that the position of the decorative panel air channel is relatively concealed, from When the front end of the battery pack 10 is viewed backward, the air duct of the decorative panel is invisible, thereby making the surface of the battery pack 10 relatively neat and beautiful.

Optionally, as shown in FIG. 1 and FIG. 2 , after the assembly is completed, the front surface of the decorative plate 8 is flush with the front wall 13 of the box body 1 , thereby making the appearance of the battery pack 10 more beautiful.

In summary, the battery pack 10 according to the embodiment of the present invention has good dustproof and waterproof performance, and the heat dissipation efficiency of the battery pack 10 is improved by rationally designing the positions of the air inlet 4 and the air outlet 5 and the arrangement of the cooling air duct 32 .

A vehicle according to another embodiment of the present invention includes the battery pack 10 of the above embodiment. As for other structures of the vehicle, such as the chassis and the transmission, etc., are well-known technologies well known to those skilled in the art, they will not be repeated here.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples" or "some examples" mean specific features described in connection with the embodiment or example, A structure, material or characteristic is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. a kind of battery bag, it is characterised in that including：

Casing, the casing has open top, and the negative interface of low-voltage interface, positive pressure interface high, high pressure is provided with the casing And explosion-proof valve；

Cover plate, the cover plate is arranged on the top of the casing and closes the open top；

Battery modules, the battery modules are arranged on the box house, and cooling air channel is formed with the battery modules；

Air inlet and air outlet, the air inlet and the air outlet are separately positioned on the casing, the air inlet and institute The outer surface for stating air outlet is respectively arranged with waterproof and breathable structure；And

Wind EGR, the wind EGR is arranged at the air inlet and the air outlet.

2. battery bag according to claim 1, it is characterised in that the air inlet and the air outlet are respectively formed at institute State on two relative or neighbor side walls of casing.

3. battery bag according to claim 1, it is characterised in that the setting of the air inlet is highly less than the air outlet Setting highly.

4. battery bag according to claim 1, it is characterised in that the battery modules include：

Multiple juxtaposed battery units, the battery unit includes body, upper flange part and lower flange portion, the upper flange part The upper end and two sides of the body prominent to both sides respectively of the body are arranged on, the lower flange portion is arranged on Two sides of the lower end of the body and the respectively body prominent to both sides, adjacent two battery units Upper flange part is abutted and the lower flange portion of two adjacent battery units abuts, so as in two adjacent battery lists The cooling air channel is formed between the body of unit.

5. battery bag according to claim 4, it is characterised in that the cooling air channel prolongs along the short transverse of the casing Stretch, and from the air inlet to being formed completely through formula air channel on the direction of the air outlet.

6. battery bag according to claim 1, it is characterised in that the waterproof and breathable structure includes：Substrate, the substrate On be formed with multiple grids, be provided with waterproof ventilated membrane at the grid.

7. battery bag according to claim 1, it is characterised in that the upper left corner and the upper right corner of the casing are respectively formed with Upper left corner recess and upper right corner recess, are provided with the upper surface of in the upper left corner recess and the upper right corner recess The negative interface of high pressure is provided with positive pressure interface high and another upper surface.

8. battery bag according to claim 1, it is characterised in that the casing has an antetheca, the bottom of the antetheca to It is recessed into form antetheca recess, the air inlet is formed on the antetheca recess.

9. battery bag according to claim 8, it is characterised in that also include：Decorative panel, the decorative panel is arranged on described In antetheca recess and the air inlet is covered, be provided with decorative panel air channel on the decorative panel, the decorative panel air channel is by institute State air inlet to be connected with external environment condition, the decorative panel air channel is formed on the rear surface of the decorative panel, the decorative panel wind The upper end in road connects with the air inlet and lower end extends to the lower edge of the decorative panel.

10. a kind of vehicle, it is characterised in that including the battery bag according to any one of claim 1-9.