CN219106351U

CN219106351U - Battery pack structure and vehicle

Info

Publication number: CN219106351U
Application number: CN202223606425.6U
Authority: CN
Inventors: 杨鹏飞; 杨明; 胡羽成; 张秋美
Original assignee: Dongfeng Nissan Passenger Vehicle Co
Current assignee: Dongfeng Nissan Passenger Vehicle Co
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-30
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a battery pack structure, comprising: battery casing, cold plate, upper cover and one or more battery module, battery module holding is in the holding intracavity that battery casing and upper cover formed, and the cold plate sets up between battery module and upper cover, covers battery module, sets up the heat insulating pad at least at the lateral wall that battery casing surface is close to vehicle blast pipe. According to the utility model, the heat insulation pad is arranged on the outer surface of the battery shell and close to the side wall of the vehicle exhaust pipe, so that the influence of the exhaust pipe on the heat radiation of the battery pack is reduced, the temperature difference of modules at two sides of the battery pack is smaller, and the service life of a battery system is prevented from being deteriorated. The exhaust pipe has less heat radiation to the cold plate, the cooling capacity of the cold plate can be more used for heat dissipation of the battery, the battery is in a more suitable temperature range, and the energy consumption of the system is lower. Because the heat radiation of the exhaust pipe to the module is less, the need of the battery to the refrigerating power can be reduced, and the energy consumption of the system is lower.

Description

Battery pack structure and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a battery pack structure and a vehicle.

Background

The power battery of the hybrid electric vehicle is usually arranged at the bottom of the vehicle, and because of the large occupied space, the distance between the power battery and the exhaust pipe is relatively short, the exhaust temperature near the battery pack can reach 400-500 ℃, and the proper working temperature of the battery is 15-40 ℃, so that the battery is very sensitive to temperature. Therefore, the heat of the exhaust pipe seriously affects the safety and life of the battery. Because the blast pipe is arranged on one side of battery generally, the heat that one side that the battery package is close to the blast pipe receives the blast pipe influences greatly, and one side that keeps away from the blast pipe then basically does not receive the influence, leads to the temperature inhomogeneous of battery package both sides, and the battery of both sides has great difference in temperature, influences battery system's performance and life-span. The battery pack is radiated by heat with larger exhaust, so that the starting frequency and energy consumption of a battery cooling system are increased, and the comfort and energy consumption of an air conditioner are influenced.

In order to reduce the heat radiation of the exhaust pipe to the battery pack, a larger distance is usually reserved between the exhaust pipe and the battery pack, and the disadvantage is that the arrangement space of the battery pack is compressed, so that the space utilization rate is reduced.

For this purpose, as shown in fig. 1, a heat shield 3' is added between a battery pack 1' and an exhaust pipe 2' in the prior art. Inside the battery pack 1', a battery module 4' is arranged in a battery pack shell 11', a cold plate 5' is arranged at the bottom of the battery module 4', the cold plate 5' is fixed at the bottom of the battery module 4 'through a heat-conducting adhesive 6', and the battery module 4 'is cooled through the cold plate 5'.

However, the heat transfer path of the related art is shown in fig. 2, and the heat of the exhaust pipe 2 'can be transferred to the battery module 4' faster, resulting in a higher battery temperature. Meanwhile, the temperature difference of the battery pack is large, and the performance, safety and service life of the battery system are affected. In addition, the cold plate 5' is greatly affected by the heat of the exhaust pipe 2', and has high energy consumption, and the cooling capacity of the battery module 4' is reduced.

Disclosure of Invention

Accordingly, it is necessary to provide a battery pack structure and a vehicle for solving the technical problem that the cooling effect of the battery pack of the related art is poor.

The utility model provides a battery pack structure, which is characterized by comprising: the battery module is accommodated in the accommodating cavity formed by the battery shell and the upper cover, the cold plate is arranged between the battery module and the upper cover and covers the battery module, and a heat insulation pad is arranged on the outer surface of the battery shell and close to the side wall of the vehicle exhaust pipe.

Further, a cold plate heat insulation cotton is arranged between the cold plate and the upper cover.

Still further, including a plurality of battery modules, cold plate thermal-insulated cotton sets up near the vehicle blast pipe regional the projection top of battery module.

Further, the battery module is connected with the mounting piece of the battery shell, and a module gasket is arranged between the battery module and the mounting piece.

Further, the battery module assembly comprises a plurality of battery modules, and the module gasket is arranged between the battery module close to the vehicle exhaust pipe area and the mounting piece.

Still further, the mounting is the boss, the battery module with boss bolted connection.

Further, the bottom of the battery module is provided with module heat insulation cotton.

Further, the battery module comprises a plurality of battery modules, and the bottom of the battery module close to the vehicle exhaust pipe area is provided with the module heat insulation cotton.

The utility model provides a vehicle, which comprises the battery pack structure, wherein the battery pack structure is fixed at the side of an exhaust pipe of the vehicle.

According to the utility model, the heat insulation pad is arranged on the outer surface of the battery shell and close to the side wall of the vehicle exhaust pipe, so that the influence of the exhaust pipe on the heat radiation of the battery pack is reduced, the temperature difference of modules at two sides of the battery pack is smaller, and the service life of a battery system is prevented from being deteriorated. The exhaust pipe has less heat radiation to the cold plate, the cooling capacity of the cold plate can be more used for heat dissipation of the battery, the battery is in a more suitable temperature range, and the energy consumption of the system is lower. Because the heat radiation of the exhaust pipe to the module is less, the need of the battery to the refrigerating power can be reduced, and the energy consumption of the system is lower.

Drawings

FIG. 1 is a schematic diagram of a prior art battery pack;

FIG. 2 is a schematic diagram of a prior art battery pack heat transfer path;

FIG. 3 is a schematic view of a battery pack according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of placement of a battery pack in a vehicle in accordance with an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a heat transfer path according to an embodiment of the present utility model;

FIG. 6 is a schematic view illustrating the installation of a heat insulation pad and a battery case according to an embodiment of the utility model;

FIG. 7 is a schematic view of a heat insulation pad and a battery housing after installation according to an embodiment of the utility model;

FIG. 8 is a cross-sectional view of the battery pack of FIG. 4;

fig. 9 is a schematic diagram illustrating the installation of a battery module and a battery case according to an embodiment of the present utility model;

FIG. 10 is a schematic view illustrating the assembly of a battery module and a battery housing with a module gasket according to an embodiment of the present utility model;

FIG. 11 is a schematic view of a mounting member of a battery housing according to an embodiment of the present utility model;

fig. 12 is a schematic view of a heat insulating cotton for all battery module mounting modules according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a portion of a battery module mounting module insulation cotton according to an embodiment of the present utility model;

fig. 14 is a schematic view of a gasket for mounting all battery modules according to an embodiment of the present utility model;

FIG. 15 is a schematic view of a portion of a battery module mounting module gasket according to an embodiment of the present utility model;

fig. 16 is a schematic view of a cold plate heat insulation cotton for mounting all battery modules according to an embodiment of the present utility model;

fig. 17 is a schematic view of a portion of a battery module mounting cold plate heat insulating cotton according to an embodiment of the present utility model.

Description of the marking

10-battery pack structure; 101-a region remote from the vehicle exhaust pipe; 1-a battery case; 11-mounting; 12-mounting through holes; 2-cooling plates; 3-an upper cover; 4-a battery module; 5-a heat insulation pad; 6-cold plate heat insulation cotton; 7-a module spacer; 71-spacer through holes; 8-module heat insulation cotton; 9-heat conducting glue; 20-vehicle exhaust pipe; 30-heat shield.

Detailed Description

Specific embodiments of the present utility model will be further described below with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

Fig. 3 is a schematic structural diagram of a battery pack structure 10 according to an embodiment of the present utility model, including: the battery module comprises a battery shell 1, a cold plate 2, an upper cover 3 and one or more battery modules 4, wherein the battery modules 4 are accommodated in an accommodating cavity formed by the battery shell 1 and the upper cover 3, the cold plate 2 is arranged between the battery modules 4 and the upper cover 3, the battery modules 4 are covered, and a heat insulation pad 5 is arranged on the outer surface of the battery shell 1 and close to the side wall of a vehicle exhaust pipe.

Specifically, the battery case 1 and the upper cover 3 form a housing chamber in which the battery module 4 is housed and fixed. The battery module 4 and the battery case 1 may be fixed by bolting. A cold plate 2 is placed between the battery module 4 and the upper cover 3, and the cold plate 2 may be adhered to the battery module 4 through a heat conductive adhesive 9.

As shown in fig. 4, 6 and 7, a heat insulating mat 5 is provided on the outer surface of the battery case 1, at least on the side wall near the vehicle exhaust pipe. Since the heat insulating mat 5 is provided on the side wall of the battery case 1 close to the exhaust pipe of the vehicle, the influence of the exhaust pipe on the heat radiation of the battery pack can be effectively reduced. Preferably, the heat insulation pad 5 is fixed to the battery case 1 by gluing.

As shown in fig. 3 to 9, a battery pack structure 10 according to another embodiment of the present utility model includes: the battery module comprises a battery shell 1, a cold plate 2, an upper cover 3 and one or more battery modules 4, wherein the battery modules 4 are accommodated in accommodating cavities formed by the battery shell 1 and the upper cover 3, the cold plate 2 is arranged between the battery modules 4 and the upper cover 3 and covers the battery modules 4, cold plate heat insulation cotton 6 is further arranged between the cold plate 2 and the upper cover 3, the battery modules 4 are connected with mounting pieces 11 of the battery shell 1, module gaskets 7 are arranged between the battery modules 4 and the mounting pieces 11, the mounting pieces 11 are bosses, the battery modules 4 are connected with the bosses by bolts, and heat insulation cotton 8 is arranged at the bottom of the battery modules 4 and is at least arranged on the outer surface of the battery shell 1 close to the side wall of a vehicle exhaust pipe.

Specifically, as shown in fig. 3 and 8, the battery case 1 and the upper cover 3 form a receiving chamber in which the battery module 4 is received and fixed. The battery module 4 and the battery case 1 may be fixed by bolting. A cold plate heat insulation cotton 6 and a cold plate 2 are sequentially arranged between the battery module 4 and the upper cover 3 from top to bottom, and the cold plate 2 is adhered with the battery module 4 through a heat-conducting adhesive 9. The cold plate heat insulation cotton 6 is preferably fixed to the upper cover 3 and the cold plate 2, respectively, by gluing.

As shown in fig. 4, 6 and 7, a heat insulating mat 5 is provided on the outer surface of the battery case 1, at least on the side wall near the vehicle exhaust pipe. Since the heat insulating mat 5 is provided on the side wall of the battery case 1 close to the exhaust pipe of the vehicle, the influence of the exhaust pipe on the heat radiation of the battery pack can be effectively reduced.

As shown in fig. 9 to 11, the battery module 4 is connected with a mounting member 11 of the battery case 1, the mounting member 11 is preferably a boss in which a mounting through hole 12 is formed, and is bolted to the bottom of the battery module 4 by a bolt. Preferably, the bottom of the battery module 4 is provided with a notch matched with the boss, and the boss is clamped into the notch to realize connection.

The boss is a part of the battery housing 1, and is used for fixing the battery module 4, providing supporting force for the battery module 4, and having higher structural strength. The boss is provided with a threaded hole for fixing the battery module 4. The design of boss makes to have very little area of contact between battery case 1 and the battery module 4, effectively reduces blast pipe heat and passes through the casing and transmit for battery module 4.

Specifically, a plurality of bosses are formed by punching the bottom edge of the battery shell 1, a module through hole is formed in the bottom of the battery module 4, a plurality of mounting through holes 12 are formed in the bosses, and bolts penetrate through the mounting through holes 12 to be in threaded connection with the module through holes in the bottom of the battery module 4.

A module gasket 7 is provided between the battery module 4 and the mounting member 11, the module gasket 7 is provided with a gasket through hole, and a bolt is inserted from the mounting through hole 12, passes through the gasket through hole 71, and is then screwed to the bottom of the battery module 4.

The bottom of the battery module 4 is also provided with a module heat insulation cotton 8, and the battery module 4 is pressed at the bottom of the battery shell 1. Preferably, the module heat insulating cotton 8 is fixed to the bottom of the battery case 1 by gluing.

Specific heat transfer paths as shown in fig. 5, the vehicle exhaust pipe 20 is transferred to the heat shield 30 and then thermally conducted to the heat shield 5 and the upper cover 3, respectively. One path of heat is transferred to the cold plate 2 from the upper cover 3 through the cold plate heat insulation cotton 6 for heat exchange. The other path of heat sequentially passes through the battery shell 1, the module gasket 7 and the battery module 4 from the heat insulation pad 5. Then, the battery heat generated by the battery module 4 is transferred to the cold plate 2 through the heat-conducting glue 9 for heat exchange.

According to the embodiment, the heat insulation pad is additionally arranged on the outer surface of one side of the battery shell, which is close to the vehicle exhaust pipe, and meanwhile, the module gasket is additionally arranged on the installation contact surface of the module and the shell, so that the module gasket has good heat insulation performance, and the heat insulation effect is improved.

A layer of module heat insulation cotton is designed between the battery module and the bottom of the battery shell. In addition, the cold plate is arranged at the top of the battery module, and a layer of cold plate heat insulation cotton is arranged between the cold plate and the upper cover. The design thought similar to sandwich wraps the cold plate and the module in the middle in an all-round manner, and effectively isolates the heat radiation influence of exhaust.

The sandwich structure of the embodiment improves the space utilization to the greatest extent under the limited bottom arrangement space, arranges more electric quantity, can effectively limit the influence of the heat radiation of the exhaust pipe on the battery pack, and ensures the safe operation of the battery. The effective heat insulation design reduces the influence of the exhaust pipe on the heat radiation of the battery pack, can make the temperature difference of the modules at two sides of the battery pack smaller, and avoids the service life deterioration of the battery system. The exhaust pipe has less heat radiation to the cold plate, the cooling capacity of the cold plate can be more used for heat dissipation of the battery, the battery is in a more suitable temperature range, and the energy consumption of the system is lower. The exhaust pipe has less heat radiation to the module, the requirement of the battery for refrigerating power can be reduced, and the energy consumption of the system is lower.

According to the embodiment, the space for arranging the batteries on the chassis of the hybrid electric vehicle is increased, more electric quantity can be arranged, the temperature difference between the batteries on two sides of the battery pack is reduced, and the performance and the service life of the batteries are effectively improved. And the heat radiation of the exhaust pipe to the cold plate and the module is reduced, and the energy consumption of the system is reduced. Meanwhile, the heat insulation design of the sandwich of the embodiment can ensure that the battery pack does not exceed the safe temperature of the battery even if the cooling system is effective.

In one embodiment, as shown in fig. 12, a plurality of battery modules 4 are included, and the module heat insulating cotton 8 is provided at the bottom of each battery module 4.

In one embodiment, as shown in fig. 13, a plurality of the battery modules 4 are included, and the module heat insulating cotton 8 is provided near the bottom of the battery module 4 in the exhaust pipe region of the vehicle.

In fig. 12 and 13, only the module heat insulation cotton 8 is shown for convenience of description, and other elements of the battery pack are hidden.

In this embodiment, the module heat insulation cotton 8 is disposed at the bottom of the battery module 4 close to the vehicle exhaust pipe 20 area, and the module heat insulation cotton 8 is not disposed at the bottom of the battery module 4 far away from the vehicle exhaust pipe area 101, so that the cost is reduced and the temperature difference between modules is reduced on the premise that the battery heat insulation effect is small. The area near the vehicle exhaust pipe 20 is an area near the vehicle exhaust pipe 20 in the battery pack, and is determined according to the arrangement of the vehicle exhaust pipe 20. For example, the battery pack is divided into a left front region, a right front region, a left rear region, and a right rear region. With the vehicle exhaust pipe 20 being positioned in front of and to the left of the battery pack, the regions near the vehicle exhaust pipe 20 are the front left region, the front right region, and the rear left region of the battery pack. But the rear right region of the battery pack is remote from the vehicle vent pipe region 101.

In one embodiment, as shown in fig. 14, a plurality of the battery modules 4 are included, and the module gasket 7 is provided between all the battery modules 4 and the mount 11.

In one embodiment, as shown in fig. 15, which includes a plurality of the battery modules 4, the module gasket 7 is provided between the battery module 4 and the mount 11 near the exhaust pipe region of the vehicle.

In fig. 14 and 15, only the module spacer 7 is shown for convenience of illustration, and other elements of the battery pack are hidden.

In this embodiment, the module gasket 7 is disposed between the battery module 4 and the mounting member 11 near the area of the vehicle exhaust pipe 20, and the module gasket 7 is not disposed between the battery module 4 and the mounting member 11 far from the area 101 of the vehicle exhaust pipe, so that the cost is reduced and the temperature difference between the modules is reduced on the premise that the heat insulation effect of the battery is less. The area near the vehicle exhaust pipe 20 is an area near the vehicle exhaust pipe 20 in the battery pack, and is determined according to the arrangement of the vehicle exhaust pipe 20. For example, the battery pack is divided into a left front region, a right front region, a left rear region, and a right rear region. With the vehicle exhaust pipe 20 being positioned in front of and to the left of the battery pack, the regions near the vehicle exhaust pipe 20 are the front left region, the front right region, and the rear left region of the battery pack. But the rear right region of the battery pack is remote from the vehicle vent pipe region 101.

In one embodiment, as shown in fig. 16, a plurality of the battery modules 4 are included, and cold plate heat insulation cotton 6 is disposed above all the battery modules 4.

In one embodiment, as shown in fig. 17, including a plurality of the battery modules 4, the cold plate heat insulating cotton 6 is disposed above the projection of the battery modules 4 near the exhaust pipe region of the vehicle.

In fig. 16 and 17, only the cold plate heat insulating cotton 6 is shown for convenience of illustration, and other elements of the battery pack are hidden.

In this embodiment, the cold plate heat insulation cotton 6 is disposed above the projection of the battery module 4 near the vehicle exhaust pipe 20 region, and the cold plate heat insulation cotton 6 is not disposed above the projection of the battery module 4 far away from the vehicle exhaust pipe region 101, so that the cost is reduced and the temperature difference between the modules is reduced on the premise that the heat insulation effect of the battery is small. The area near the vehicle exhaust pipe 20 is an area near the vehicle exhaust pipe 20 in the battery pack, and is determined according to the arrangement of the vehicle exhaust pipe 20. For example, the battery pack is divided into a left front region, a right front region, a left rear region, and a right rear region. With the vehicle exhaust pipe 20 being positioned in front of and to the left of the battery pack, the regions near the vehicle exhaust pipe 20 are the front left region, the front right region, and the rear left region of the battery pack. But the rear right region of the battery pack is remote from the vehicle vent pipe region 101.

The present utility model provides a vehicle, as shown in fig. 4, comprising a battery pack structure 10 as described above, the battery pack structure 10 being fixed to the side of the vehicle exhaust pipe 20.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A battery pack structure (10), characterized by comprising: battery casing (1), cold plate (2), upper cover (3) and one or more battery module (4), battery module (4) holding is in battery casing (1) with the holding intracavity that upper cover (3) formed, cold plate (2) set up battery module (4) with cover (3) between, cover battery module (4) is in at least battery casing (1) surface is close to the lateral wall of vehicle blast pipe and sets up heat insulating pad (5).

2. The battery pack structure (10) according to claim 1, wherein a cold plate heat insulating cotton (6) is further provided between the cold plate (2) and the upper cover (3).

3. The battery pack structure (10) according to claim 2, comprising a plurality of the battery modules (4), the cold plate heat insulating cotton (6) being disposed above a projection of the battery modules (4) near the vehicle exhaust pipe region.

4. The battery pack structure (10) according to claim 1, wherein the battery module (4) is connected with a mounting member (11) of the battery case (1), and a module gasket (7) is provided between the battery module (4) and the mounting member (11).

5. The battery pack structure (10) according to claim 4, characterized by comprising a plurality of the battery modules (4), the module gasket (7) being provided between the battery module (4) and the mount (11) near the vehicle exhaust pipe region.

6. The battery pack structure (10) according to claim 4, wherein the mounting member (11) is a boss to which the battery module (4) is bolted.

7. The battery pack structure (10) according to claim 1, wherein a module heat insulating cotton (8) is provided at the bottom of the battery module (4).

8. The battery pack structure (10) according to claim 7, characterized by comprising a plurality of the battery modules (4), the module heat insulating cotton (8) being provided near the bottom of the battery module (4) of the vehicle exhaust pipe region.

9. A vehicle comprising a battery pack structure (10) according to any one of claims 1 to 8, the battery pack structure (10) being fixed laterally to the vehicle exhaust pipe (20).