CN219180597U

CN219180597U - Thermal management system and battery pack

Info

Publication number: CN219180597U
Application number: CN202222798611.8U
Authority: CN
Inventors: 邓依恒; 桂昊; 杜俊丰; 邓江南; 金佺良; 於洪将
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-06-13
Anticipated expiration: 2032-10-24

Abstract

The utility model relates to a thermal management system and a battery pack, wherein the thermal management system comprises: the first-stage box body is provided with an air duct along the length direction and/or the width direction of the first-stage box body; the first-stage box body is provided with at least one accommodating cavity for accommodating the battery module; the battery module comprises a secondary box body, a battery is arranged in the secondary box body, and a water channel is formed along the length direction of the secondary box body and/or along the width direction of the secondary box body; the box cover is connected with the primary box body, and an air channel is formed along the length direction of the box cover and/or the width direction of the box cover; and the cooling water channel is communicated with the water channel and used for cooling the battery. The utility model adopts the cooling modes of water cooling and air cooling to cool the battery pack, and has high cooling efficiency and low cost.

Description

Thermal management system and battery pack

Technical Field

The utility model relates to the technical field of thermal management of power batteries, in particular to a thermal management system and a battery pack.

Background

At present, the power battery has large working current and large heat generation amount, and meanwhile, the battery pack is in a relatively closed environment, so that the temperature of the battery can be increased. This is because the electrolyte in the lithium battery plays a role in charge conduction inside the lithium battery, and a battery without the electrolyte is a battery that cannot be charged and discharged. Most of lithium batteries are formed by flammable and volatile nonaqueous solutions, and compared with batteries formed by aqueous electrolyte, the composition system has higher specific energy and voltage output and meets higher energy requirements of users. Because the nonaqueous electrolyte is inflammable and volatile, the nonaqueous electrolyte wets the inside of the battery, and forms the combustion source of the battery. Therefore, the working temperature of the two battery materials is not higher than 60 ℃, but when the outdoor temperature is more than or equal to 40 ℃, the battery generates large heat, so that the working environment temperature of the battery rises, and if thermal runaway occurs, the situation is dangerous. In order to avoid the power battery being too high, it is particularly important to radiate heat from the battery.

In the prior art, a battery pack mostly adopts a single cooling system, such as water cooling, air cooling, direct cooling, etc., wherein the main advantages of adopting gas (air) as a heat transfer medium are as follows: the structure is simple, the weight is light, the harmful gas can be effectively ventilated when being generated, and the cost is low; the above-mentioned shortcomings are: the heat exchange coefficient between the battery and the wall surface of the battery is low, the cooling speed is low, and the cooling efficiency is low.

The main advantages of using liquid as the heat transfer medium are: the heat exchange coefficient between the battery and the wall surface of the battery is high, and the cooling speed is high; the above-mentioned shortcomings are: the sealing performance is high, the quality is relatively large, the maintenance and the maintenance are complex, the components such as the water jacket, the heat exchanger and the like are needed, the structure is relatively complex, and the cooling efficiency is low.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model discloses a thermal management system and a battery pack.

The technical scheme adopted by the utility model is as follows:

a thermal management system, comprising:

the first-stage box body is provided with an air duct along the length direction and/or the width direction of the first-stage box body; the primary box body is provided with at least one accommodating cavity for accommodating a battery module; the battery module comprises a secondary box body, a battery is arranged in the secondary box body, and a water channel is formed along the length direction of the secondary box body and/or along the width direction of the secondary box body;

the box cover is connected with the primary box body, and an air channel is formed along the length direction of the box cover and/or the width direction of the box cover;

and the cooling water channel is communicated with the water channel and used for cooling the battery.

The method is further technically characterized in that: the primary box and the box cover can be integrated on the vehicle body, and the primary box and the box cover are part of the vehicle body.

The method is further technically characterized in that: the primary box body is provided with a plurality of accommodating cavities, the plurality of accommodating cavities are arranged in an M multiplied by N matrix mode, M is more than or equal to 1, and N is more than or equal to 1.

The method is further technically characterized in that: the first-stage box comprises at least one group of first side walls and second side walls, the first side walls and the second side walls are mutually perpendicular, the first side walls and the second side walls are provided with through channels, and the through channels of the first side walls are communicated with the through channels of the second side walls.

The method is further technically characterized in that: the secondary box comprises a water inlet plate, a group of side cooling plates, a water outlet plate, a top cooling plate and a bottom cooling plate, wherein the water inlet plate is used for enclosing a shell and is provided with a water channel, the water inlet plate is provided with a water inlet pipe, the water outlet plate is provided with a water outlet pipe, and the water inlet pipe and the water outlet pipe are connected with the cooling water channel.

The method is further technically characterized in that: the water channel of the water inlet plate, the water channel of the side cooling plate, the water channel of the water outlet plate, the water channel of the top cooling plate and the water channel of the bottom cooling plate are mutually communicated.

The method is further technically characterized in that: the cross-sectional shapes of the water channel of the water inlet plate, the water channel of the side cooling plate, the water channel of the water outlet plate, the water channel of the top cooling plate and the water channel of the bottom cooling plate are polygonal, circular or special-shaped.

The method is further technically characterized in that: the cooling water channel comprises a water inlet pipeline and a water outlet pipeline, and the water inlet pipeline and the water outlet pipeline are communicated with the water channel; the water inlet pipeline and the water outlet pipeline are respectively provided with a main pipe and branch pipes, and the number of the branch pipes of the water inlet pipeline and the number of the branch pipes of the water outlet pipeline are the same as the number of the accommodating cavities.

The method is further technically characterized in that: the cross section of the air duct of the primary box body is polygonal, circular or special-shaped.

The method is further technically characterized in that: the cross section of the air duct of the box cover is polygonal, circular or special-shaped.

The method is further technically characterized in that: the air conditioner further comprises a fan, wherein the fan is arranged on one side of the air duct of the primary box body.

A battery pack comprising a battery pack housing frame having a thermal management system as described above disposed therein.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the utility model adopts a high-efficiency cooling mode of water cooling and air cooling combined cooling, combines the advantages of air cooling and water cooling, keeps the temperature in the battery pack not to exceed a threshold value, keeps the temperature difference not to exceed the threshold value, and improves the cooling efficiency.

The utility model is helpful for controlling the temperature of the battery in a relatively safe environment, and avoids the danger to the battery caused by overheat.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic diagram of the thermal management system of embodiment 1 of the present utility model.

FIG. 2 is a schematic diagram of the thermal management system of embodiment 2 of the present utility model.

Fig. 3 is a schematic view of the structure of fig. 1 or 2 with the cover removed.

Fig. 4 is a schematic structural view of the case of fig. 1 or 2.

Fig. 5 is a side view of the case of fig. 4.

Fig. 6 is a schematic view of the structure of the case cover and the cooling water path of fig. 1 or 2 at a first view angle.

Fig. 7 is a side view of the tank cover and cooling waterway of fig. 6.

Fig. 8 is a schematic structural view of the case cover and the cooling water path of fig. 1 or 2 at a second view angle.

Fig. 9 is a schematic structural view of the battery module of fig. 1 or 2.

Fig. 10 is a front view of the battery module of fig. 1 or 2.

Fig. 11 is a cross-sectional view at A-A in fig. 10.

Fig. 12 is a schematic view of the first operation state of embodiment 1.

Fig. 13 is a schematic view of the second operation state of embodiment 1.

Fig. 14 is a schematic view of the operation state of embodiment 2.

Description of the specification reference numerals: 1. a first-stage box body; 101. a first sidewall; 102. a second sidewall; 2. a case cover; 3. a battery module; 301. a water inlet plate; 302. a side cooling plate; 303. a water outlet plate; 304. a top cold plate; 305. a bottom cold plate; 306. a water inlet pipe; 307. a water outlet pipe; 4. a cooling water path; 401. a water inlet pipeline; 402. a water outlet pipeline; 5. a blower; 6. and a battery.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, read in conjunction with the accompanying drawings. The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, directional terminology is used for the purpose of illustration and is not intended to be limiting of the utility model, and furthermore, like reference numerals refer to like elements throughout the embodiments.

Example 1:

with reference to fig. 1, 3 and 6, a thermal management system, comprising:

the primary box body 1 is provided with an air duct along the length direction and/or the width direction; the primary box body 1 is provided with at least one accommodating cavity for accommodating the battery module 3; the battery module 3 comprises a secondary box body, a battery 6 is arranged in the secondary box body, and a water channel is formed along the length direction of the secondary box body and/or along the width direction of the secondary box body;

the box cover 2 is connected with the primary box body 1, and an air channel is formed along the length direction of the box cover 2 and/or the width direction of the box cover 2;

the cooling water channel 4 is communicated with the water channel and cools the battery 6.

The above-mentioned heat management system that provides has solved the problem that the heat management system cooling efficiency of battery package is not high in the traditional design, adopts water-cooling and forced air cooling's cooling mode to cool down the battery package, keeps the temperature in the battery package not to surpass the threshold value, and the difference in temperature does not surpass the threshold value.

In the present embodiment, the primary box 1 and the box cover 2 may be integrated on the vehicle body, and the primary box 1 and the box cover 2 are a part of the vehicle body.

In this embodiment, the primary box 1 is provided with four accommodating chambers, and the four accommodating chambers are arranged in a 2×2 matrix manner.

Referring to fig. 4 and 5, in this embodiment, the primary box 1 includes three sets of first side walls 101 and second side walls 102, the first side walls 101 and the second side walls 102 are disposed perpendicular to each other, the first side walls 101 and the second side walls 102 each have a through channel, and the through channels of the first side walls 101 and the through channels of the second side walls 102 are communicated.

Specifically, the primary box 1 is obtained by extruding a section bar, the first side wall 101 and the second side wall 102 are hollow, and reinforcing ribs are arranged in the cavity of the first side wall 101 and the cavity of the second side wall 102. The first side wall 101 and the second side wall 102 have cavities penetrating the entire wall in the wall thickness direction, and the cavities of the other walls are penetrated in the cavity penetrating direction by cutting where the first side wall 101 and the second side wall 102 contact the other walls.

In this embodiment, the air duct forming process of the case cover 2 is as follows: a cavity penetrating through the whole case cover 2 is arranged in a certain direction of the case cover 2, and a reinforcing rib is arranged in the middle of the cavity.

Referring to fig. 9-11, in this embodiment, the secondary box includes a water inlet plate 301, a set of side cooling plates 302, a water outlet plate 303, a top cooling plate 304 and a bottom cooling plate 305, which enclose a housing and form a water channel, the water inlet plate 301 is provided with a water inlet pipe 306, the water outlet plate 303 is provided with a water outlet pipe 307, and the water inlet pipe 306 and the water outlet pipe 307 are both connected with the cooling water channel 4.

Specifically, a water inlet plate 301, side cooling plates 302, a water outlet plate 303, a top cooling plate 304, and a bottom cooling plate 305 (the above plates are collectively referred to as cooling plates) are located on each face of the battery 6. The water inlet pipeline 401 is connected with the water inlet pipe 306 in an inserting way, the water outlet pipeline 402 is connected with the water outlet pipe 307 in an inserting way, the cooling liquid enters the water inlet pipe 306 from the water outlet pipe 307, flows into the water outlet pipe 307 through the cold plate, and flows out from the water outlet pipe 307 to the water outlet pipeline 402.

In the present embodiment, the water course of the water inlet plate 301, the water course of the side cooling plate 302, the water course of the water outlet plate 303, the water course of the top cooling plate 304, and the water course of the bottom cooling plate 305 are in communication with each other.

Specifically, the cross-sectional shapes of the water channel of the water inlet plate 301, the water channel of the side cooling plate 302, the water channel of the water outlet plate 303, the water channel of the top cooling plate 304, and the water channel of the bottom cooling plate 305 are polygonal or circular or irregular.

Preferably, in order to make water inlet/outlet of the water course smooth and meet the requirement of large water amount, the water course of the water inlet plate 301, the water course of the side cooling plate 302, the water course of the water outlet plate 303, the water course of the top cooling plate 304 and the water course of the bottom cooling plate 305 are designed to have rectangular cross-sectional shapes, and the cross-sectional shape of the water course is designed to have a rectangular cross-sectional shape so that the manufacturing process of the secondary tank is simple.

Referring to fig. 7 and 8, in the present embodiment, the cooling water path 4 includes a water inlet pipe 401 and a water outlet pipe 402, and the water inlet pipe 401 and the water outlet pipe 402 are communicated with the water path; the water inlet pipeline 401 and the water outlet pipeline 402 are respectively provided with a main pipe and branch pipes, and the number of the branch pipes of the water inlet pipeline 401 and the number of the branch pipes of the water outlet pipeline 402 are the same as the number of the accommodating cavities.

In this embodiment, the cross-sectional shape of the air duct of the primary box 1 is polygonal, circular or irregular. The cross section of the air duct of the case cover 2 is polygonal, circular or special-shaped.

Preferably, in order to enable air inlet/outlet of the air duct to be smooth and meet the requirement of large air quantity, the cross section of the air duct of the primary box body 1 and the cross section of the air duct of the box cover 2 are rectangular, and the cross section of the air duct is designed to be rectangular, so that the manufacturing process of the primary box body 1 is simple and convenient.

With reference to fig. 12 and 13, the working principle of the present embodiment is as follows:

according to the driving direction of the automobile, the cavity penetrates through the whole box body 1, the cavity is an air duct (air cooling flow passage), heat is taken away through natural air convection, the arrow direction in fig. 12 and 13 is the wind direction, and meanwhile, the flow path of cooling liquid on the cooling plate is as follows: the cooling liquid enters the water inlet plate 301 from the water inlet pipe 306, flows into the top cold plate 304, the bottom cold plate 305 and the side cold plates 302, flows into the water outlet pipe 307 through the water outlet plate 303, and cools the battery 6 by water cooling.

Example 2:

as shown in fig. 2, the thermal management system is different from embodiment 1 in that it further includes a blower 5, and the blower 5 is disposed at the air duct side of the primary box 1.

The above provides a thermal management system, which adopts a cooling mode of water cooling and fan air cooling to perform forced convection heat dissipation on the battery pack, and keeps the temperature in the battery pack not to exceed a threshold value and the temperature difference not to exceed the threshold value.

In the present embodiment, the number of fans 5 is two, and two fans 5 are respectively disposed at one side of the through passages of the two second side walls 102.

As shown in fig. 14, the working principle of the present embodiment is as follows:

the cavity runs through whole box 1, and the cavity is wind channel (forced convection heat dissipation through fan 5 promptly, and wherein, the arrow direction is the wind direction in fig. 14, and simultaneously, the flow path of coolant liquid at the cold plate is as follows: the cooling liquid enters the water inlet plate 301 from the water inlet pipe 306, flows into the top cold plate 304, the bottom cold plate 305 and the side cold plates 302, flows into the water outlet pipe 307 through the water outlet plate 303, and cools the battery 6 by water cooling.

Example 3:

a battery pack comprising a battery pack housing frame, wherein the battery pack housing frame is provided with the thermal management system provided in embodiment 1 or embodiment 2.

The battery pack adopts the cooling system combining water cooling and air cooling to ensure the temperature difference between the battery pack and the temperature inside the battery pack, and improves the cooling efficiency.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. A thermal management system, characterized by: comprising the following steps:

the primary box body (1) is provided with an air duct along the length direction and/or the width direction; the primary box body (1) is provided with at least one accommodating cavity for accommodating the battery module (3); the battery module (3) comprises a secondary box body, a battery (6) is arranged in the secondary box body, and a water channel is formed along the length direction of the secondary box body and/or along the width direction of the secondary box body;

the box cover (2) is connected with the primary box body (1), and an air channel is formed along the length direction of the box cover (2) and/or the width direction of the box cover (2);

and a cooling water channel (4) communicated with the water channel for cooling the battery (6).

2. The thermal management system of claim 1, wherein: the primary box body (1) and the box cover (2) can be integrated on a vehicle body, and the primary box body (1) and the box cover (2) are part of the vehicle body.

3. The thermal management system of claim 1, wherein: the primary box body (1) is provided with a plurality of accommodating cavities, the plurality of accommodating cavities are arranged in an M multiplied by N matrix mode, M is more than or equal to 1, and N is more than or equal to 1.

4. The thermal management system of claim 1, wherein: the primary box body (1) comprises at least one group of first side walls (101) and second side walls (102), the first side walls (101) and the second side walls (102) are perpendicular to each other, through channels are formed in the first side walls (101) and the second side walls (102), and the through channels of the first side walls (101) are communicated with the through channels of the second side walls (102).

5. The thermal management system of claim 1, wherein: the secondary box comprises a water inlet plate (301), a group of side cooling plates (302), a water outlet plate (303), a top cooling plate (304) and a bottom cooling plate (305), wherein the water inlet plate (301) is provided with a water inlet pipe (306), the water outlet plate (303) is provided with a water outlet pipe (307), and the water inlet pipe (306) and the water outlet pipe (307) are connected with the cooling waterway (4).

6. The thermal management system of claim 5, wherein: the water channel of the water inlet plate (301), the water channel of the side cooling plate (302), the water channel of the water outlet plate (303), the water channel of the top cooling plate (304) and the water channel of the bottom cooling plate (305) are mutually communicated.

7. The thermal management system of claim 5, wherein: the water channel of the water inlet plate (301), the water channel of the side cooling plate (302), the water channel of the water outlet plate (303), the water channel of the top cooling plate (304) and the water channel of the bottom cooling plate (305) are polygonal or circular in cross section.

8. The thermal management system of claim 1, wherein: the cooling water channel (4) comprises a water inlet pipeline (401) and a water outlet pipeline (402), and the water inlet pipeline (401) and the water outlet pipeline (402) are communicated with the water channel; the water inlet pipeline (401) and the water outlet pipeline (402) are respectively provided with a main pipe and branch pipes, and the number of the branch pipes of the water inlet pipeline (401) and the number of the branch pipes of the water outlet pipeline (402) are the same as the number of the accommodating cavities.

9. The thermal management system of claim 1, wherein: the cross section of the air duct of the primary box body (1) is polygonal or circular.

10. The thermal management system of claim 1, wherein: the cross section of the air duct of the box cover (2) is polygonal or circular.

11. The thermal management system of claim 1, wherein: the novel air conditioner further comprises a fan (5), and the fan (5) is arranged on one side of the air duct of the primary box body (1).

12. A battery pack, characterized in that: comprising a battery pack housing frame having a thermal management system according to any one of claims 1-11 disposed therein.