CN216133913U

CN216133913U - Heat management device based on power battery

Info

Publication number: CN216133913U
Application number: CN202122639354.9U
Authority: CN
Inventors: 林哲浩; 朱传辉; 刘薇; 胡宸瑜; 魏俊杰; 龙睿
Original assignee: Zhejiang University of Water Resources and Electric Power
Current assignee: Zhejiang University of Water Resources and Electric Power
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-25
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a thermal management device based on a power battery, which comprises: an upper reservoir; a lower reservoir; a battery pack disposed between the upper reservoir and the lower reservoir; heat-conducting component, heat-conducting component establish between last reservoir and lower reservoir, and the heat-conducting component parcel is in the outside of group battery, and heat-conducting component includes: the heat conduction module is formed into a hollow ring shape, the inner peripheral wall of the heat conduction module is attached to the outer peripheral wall of the battery pack, the copper pipe is arranged in the heat conduction module and is spiral, one end of the copper pipe is communicated with the first connecting port, and the other end of the copper pipe is communicated with the third connecting port; one end of the heat exchanger is communicated with the second connector, and the other end of the heat exchanger is communicated with the fourth connector; and the cooling liquid is suitable for circulating flow among the upper liquid storage device, the lower liquid storage device, the copper pipe, the heat exchanger and the circulating pump. According to the thermal management device based on the power battery, disclosed by the embodiment of the utility model, the quick heat dissipation of the battery pack can be realized.

Description

Heat management device based on power battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a thermal management device based on a power battery.

Background

The lithium ion battery has the advantages of low self-discharge rate, long cycle life, high power and energy density and the like, and is widely applied to the field of new energy electric automobiles, so that the lithium ion battery is important to maintain efficient, reliable and safe work. However, if the heat generated by the lithium ion battery in the charging and discharging process cannot be evacuated in time, the temperature of the battery rises, so that the temperature difference of the battery pack is generated, the performance is damaged, and when the temperature exceeds the upper safety limit, safety problems such as thermal runaway and the like can be triggered, and even serious explosion consequences can be caused.

Along with the integration and high-density rapid development of the lithium ion battery for the automobile, the heat production quantity per unit volume is increased, and the conventional heat exchange mode and the heat exchange medium cannot meet the working condition of the lithium ion battery. 9.41 ten thousands of new energy automobiles are recalled in China in 2020, the heat management problem related to the power battery accounts for about 32%, in addition, after a new energy automobile fire disaster happens, a battery heat management system is an important factor for restricting the development of the electric automobile.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a thermal management device based on a power battery, which has the advantage of high heat dissipation speed.

The thermal management device based on the power battery comprises: the upper liquid storage device is provided with a first connecting port and a second connecting port which are communicated with the first liquid storage cavity; the lower liquid storage device and the upper liquid storage device are opposite up and down and are arranged at intervals, the lower liquid storage device defines a second liquid storage cavity for containing cooling liquid, and the lower liquid storage device is provided with a third connecting port and a fourth connecting port which are communicated with the second liquid storage cavity; a battery pack disposed between the upper reservoir and the lower reservoir; heat-conducting component, heat-conducting component establishes go up the reservoir with between the reservoir down, heat-conducting component parcel is in the outside of group battery, heat-conducting component includes: the heat conduction module is formed into a hollow ring shape, the inner peripheral wall of the heat conduction module is attached to the outer peripheral wall of the battery pack, the copper pipe is arranged in the heat conduction module and is spiral, one end of the copper pipe is communicated with the first connecting port, and the other end of the copper pipe is communicated with the third connecting port; one end of the heat exchanger is communicated with the second connecting port, and the other end of the heat exchanger is communicated with the fourth connecting port; the cooling liquid is suitable for circularly flowing among the upper liquid storage device, the lower liquid storage device, the copper pipe, the heat exchanger and the circulating pump.

According to the heat management device based on the power battery, the heat exchange area of the heat conduction assembly and the heat exchange area of the battery pack can be increased by wrapping the heat conduction assembly on the outer peripheral wall of the battery pack, and meanwhile, the spiral copper pipe is arranged in the heat conduction assembly, so that the heat exchange area between the copper pipe and the heat conduction module can be further increased, heat generated by heat dissipation of the battery pack can be rapidly taken away by using cooling liquid, and rapid heat dissipation of the battery pack is further realized.

In some embodiments of the utility model, the thermally conductive assembly further comprises: the fin, the fin is connected on the periphery wall of copper pipe, the fin is a plurality of, and is a plurality of the fin is followed the circumference and the axial distribution of copper pipe.

In some embodiments of the utility model, the heat conducting module is a paraffin material piece.

In some embodiments of the present invention, the number of the battery packs is plural, the plural battery packs are arranged in multiple rows and multiple columns, the number of the heat conducting assemblies is plural, and the plural heat conducting assemblies and the plural battery packs are arranged in one-to-one correspondence.

In some embodiments of the utility model, an expansion gap is provided between two adjacent heat conducting assemblies.

In some embodiments of the utility model, the power cell based thermal management apparatus further comprises: and the wind wheel is used for accelerating the heat exchange between the heat exchanger and the air.

In some embodiments of the utility model, the copper tube has a hydraulic diameter of 0.01 to 0.2 mm.

In some embodiments of the present invention, in the upper reservoir, the first connection port is a liquid inlet, the second connection port is a liquid outlet, and in the lower reservoir, the fourth connection port is a liquid inlet, and the third connection port is a liquid outlet.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a thermal management device according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a thermally conductive assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a heat conductive assembly and a battery pack according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an upper reservoir according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a lower reservoir according to an embodiment of the present invention.

Reference numerals:

the thermal management device 100 is a device that is,

an upper liquid storage device 1, a first connecting port 11, a second connecting port 12, a first liquid storage cavity 13,

a lower liquid storage device 2, a third connecting port 21, a fourth connecting port 22, a second liquid storage cavity 23,

the battery pack 3, the heat conducting assembly 4, the heat conducting module 41, the copper pipe 42, the fins 43,

a heat exchanger 5, a circulating pump 6 and a wind wheel 7.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A power cell based thermal management apparatus 100 according to an embodiment of the present invention is described below with reference to fig. 1-5.

As shown in fig. 1, a thermal management device 100 based on a power battery according to an embodiment of the present invention includes: go up reservoir 1, lower reservoir 2, group battery 3, heat-conducting component 4, heat exchanger 5 and circulating pump 6.

Specifically, as shown in fig. 1 to 5, the upper reservoir 1, the lower reservoir 2, the heat conducting assembly 4, the circulating pump 6 and the heat exchanger 5 are connected in series, and the cooling liquid is adapted to flow circularly between the upper reservoir 1, the lower reservoir 2, the copper pipe 42, the heat exchanger 5 and the circulating pump 6.

As shown in fig. 1, 4 and 5, the upper liquid storage device 1 defines a first liquid storage cavity 13 for containing cooling liquid, the upper liquid storage device 1 has a first connecting port 11 and a second connecting port 12 which are communicated with the first liquid storage cavity 13, the lower liquid storage device 2 and the upper liquid storage device 1 are arranged opposite to each other at intervals, the lower liquid storage device 2 defines a second liquid storage cavity 23 for containing cooling liquid, and the lower liquid storage device 2 has a third connecting port 21 and a fourth connecting port 22 which are communicated with the second liquid storage cavity 23. For example, in one example of the present invention, the first connection port 11 may be used as a liquid inlet, the second connection port 12 as a liquid outlet, the fourth connection port 22 as a liquid inlet, and the third connection port 21 as a liquid outlet; alternatively, the first connection port 11 is a liquid outlet, the second connection port 12 is a port, the fourth connection port 22 is a liquid outlet, and the third connection port 21 is a liquid inlet.

As shown in fig. 1 to 3, the battery pack 3 is disposed between the upper liquid reservoir 1 and the lower liquid reservoir 2, the heat transfer member 4 is wrapped around the outside of the battery pack 3, and the heat transfer member 4 includes: heat conduction module 41 and copper pipe 42, heat conduction module 41 forms into hollow annular, and the internal perisporium of heat conduction module 41 and the laminating of the periphery wall of group battery 3, copper pipe 42 are established in heat conduction module 41, and copper pipe 42 is the heliciform, and copper pipe 42's one end and first connector 11 intercommunication, copper pipe 42's the other end and third connector 21 intercommunication. Through the periphery wall parcel thermal module 4 at group battery 3, can increase thermal module 4 and group battery 3's heat transfer area from this, set up spiral helicine copper pipe 42 in thermal module 4 simultaneously, can further promote the heat transfer area between copper pipe 42 and the thermal module 41 to can utilize the quick heat of sending out the group battery 3 heat dissipation of coolant liquid to take away, and then realize the quick heat dissipation of group battery 3. In addition, the spiral distribution structure of the copper pipes 42 built in the heat conducting module 41 successfully saves the space of the heat management device 100.

As shown in fig. 1, 4, and 5, one end of the heat exchanger 5 communicates with the second connection port 12, and the other end of the heat exchanger 5 communicates with the fourth connection port 22. It can be understood that, the temperature of coolant liquid can promote after absorbing heat through with low temperature coolant liquid in the copper pipe 42, after the coolant liquid flows through heat exchanger 5, utilizes the heat transfer between heat exchanger 5 and the air, can reduce the temperature of coolant liquid to can utilize the coolant liquid to circulate the cooling to group battery 3, and then realize the cyclic utilization of coolant liquid, reduce cost. Both ends of the copper pipe 42 are hermetically connected to the first connection port 11 and the third connection port 21, respectively.

As shown in fig. 1, the circulation pump 6 is connected in series between the heat exchanger 5 and the upper accumulator 1, or the circulation pump 6 is connected in series between the heat exchanger 5 and the lower accumulator 2. Thereby, the circulation pump 6 can drive the forced circulation flow of the coolant among the upper tank 1, the lower tank 2, the copper pipe 42, the heat exchanger 5, and the circulation pump 6.

According to the thermal management device 100 based on the power battery, the heat conduction assembly 4 is wrapped on the outer peripheral wall of the battery pack 3, so that the heat exchange areas of the heat conduction assembly 4 and the battery pack 3 can be increased, meanwhile, the spiral copper pipe 42 is arranged in the heat conduction assembly 4, the heat exchange area between the copper pipe 42 and the heat conduction module 41 can be further increased, heat generated by heat dissipation of the battery pack 3 can be rapidly taken away by using cooling liquid, and rapid heat dissipation of the battery pack 3 is further achieved.

In some embodiments of the present invention, as shown in fig. 1-3, the heat conducting assembly 4 further comprises: and a plurality of fins 43 are connected to the outer peripheral wall of the copper tube 42, and the plurality of fins 43 are distributed along the circumferential direction and the axial direction of the copper tube 42. It can be understood that by providing the fins 43 on the outer circumferential wall of the copper pipe 42, the contact area of the heat conducting assembly 4 and the heat conducting module 41 can be further increased by the fins 43, thereby increasing the heat exchange amount.

In some embodiments of the present invention, the heat conducting module 41 is a paraffin material. It can be understood that the paraffin has an advantage of a fast heat transfer rate, and the application of the paraffin material to the thermal management device 100 can ensure stable heat transfer and prevent the occurrence of a situation where heat is accumulated inside the battery pack 3 for a long time. In addition, paraffin wax also has the advantages of easy processing and low manufacturing cost.

In some embodiments of the present invention, as shown in fig. 1 to 3, there are a plurality of battery packs 3, the plurality of battery packs 3 are arranged in multiple rows and multiple columns, the plurality of heat conducting assemblies 4 are provided, and the plurality of heat conducting assemblies 4 and the plurality of battery packs 3 are arranged in a one-to-one correspondence. Therefore, the heat dissipation of the plurality of battery packs 3 can be realized simultaneously, and the advantages of high efficiency and cost saving are achieved. Specifically, the first connection ports 11 are provided in plurality, the third connection ports 21 are also provided in plurality, and the plurality of copper pipes 42 are provided in one-to-one correspondence with the plurality of first connection ports 11 and the plurality of third connection ports 21.

In some embodiments of the present invention, an expansion gap is provided between two adjacent heat-conducting assemblies 4. It can be understood that, the heat conducting module 41 will expand to some extent after absorbing heat, and by setting the expansion gap between two adjacent heat conducting assemblies 4, the problem of interference between the adjacent heat conducting modules 41 caused by heat can be avoided, so that the reliability of operation can be improved. Specifically, in one example of the utility model, the expansion gap is between 5mm and 10 mm.

In some embodiments of the present invention, as shown in fig. 1, the power cell based thermal management apparatus 100 further comprises: and the wind wheel 7 is used for accelerating the heat exchange between the heat exchanger 5 and the air. Therefore, the heat exchange rate of the heat exchanger 5 and the air can be increased, and the reduction of the temperature of the cooling liquid can be accelerated.

In some embodiments of the utility model, the copper tube 42 has a hydraulic diameter of 0.01 to 0.2 mm. Therefore, the copper pipe 42 can be formed into a micro-channel, the micro-channel has the advantages of high heat exchange efficiency, high heating speed, good controllability and the like, and the micro-channel is combined with air cooling and liquid cooling technologies in the related technology and is integrated into a battery thermal management system in the application. Studies have shown that the heat exchange efficiency of the stack 3 can be further improved by combining the effects of multiple fluids.

In some embodiments of the present invention, as shown in fig. 1, in the upper reservoir 1, the first connection port 11 is a liquid inlet, the second connection port 12 is a liquid outlet, and in the lower reservoir 2, the fourth connection port 22 is a liquid inlet, and the third connection port 21 is a liquid outlet. It can be understood that the cooling liquid passes through the lower liquid storage device 2 and then sequentially flows through the copper pipe 42 and the upper liquid storage device 1 from bottom to top, and the movement mode opposite to the gravity direction can improve the heat exchange efficiency.

Specifically, the coolant enters from the fourth connecting port 22 at the lower end of the lower liquid storage device 2, enters the copper pipe 42 from the corresponding copper pipe 42 through the second liquid storage cavity 23, uniformly rises to the outlet of the copper pipe 42, flows into the first liquid storage cavity 13 through the corresponding first connecting port 11, flows out through the second connecting port 12, and enters the fourth connecting port 22 through the heat exchanger 5 and the circulating pump 6, so that a complete liquid cooling circulation system is completed.

In an example of the present invention, the cooling liquid in the thermal management device 100 is water at normal temperature, and the water may be heated or cooled according to the requirement of the working environment of the battery pack 3, and the flow rate of the cooling liquid may be adjusted according to the requirement, so as to achieve the best cooling effect and prolong the service life of the battery pack 3. For example, in one example of the utility model, the thermal management device 100 further comprises a control device, the signal output of which is connected to the signal input of the circulation pump 6, the flow of cooling liquid being adjustable by means of the control device.

The thermal management device 100 of the present invention can be safely operated not only in a high-temperature environment but also in a low-temperature environment for a long period of time. The flow rate of the coolant can be appropriately increased in a high-temperature environment to improve the heat dissipation efficiency of the battery pack 3. Under low temperature conditions, the flow rate of the coolant can be appropriately reduced to reduce the heat dissipation efficiency of the battery pack 3.

The present invention is applied to a reasonable cycle, and the small-sized thermal management device 100 can be applied to an electric bicycle or a small-sized electric car, and the large-sized thermal management device 100 can be applied to a large-sized electric car or an electric bus. The design has the characteristics of large heat dissipation capacity, high heat dissipation efficiency, compact structure, controllable temperature, convenient installation of single batteries, balanced system pressure, stable operation and the like. The battery can be well subjected to efficient heat dissipation management in a severe environment, the battery can be safely operated for a long time, the endurance mileage of the electric vehicle is improved, and the application prospect is very wide.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A power cell based thermal management device, comprising:

the upper liquid storage device is provided with a first connecting port and a second connecting port which are communicated with the first liquid storage cavity;

the lower liquid storage device and the upper liquid storage device are opposite up and down and are arranged at intervals, the lower liquid storage device defines a second liquid storage cavity for containing cooling liquid, and the lower liquid storage device is provided with a third connecting port and a fourth connecting port which are communicated with the second liquid storage cavity;

a battery pack disposed between the upper reservoir and the lower reservoir;

heat-conducting component, heat-conducting component establishes go up the reservoir with between the reservoir down, heat-conducting component parcel is in the outside of group battery, heat-conducting component includes: the heat conduction module is formed into a hollow ring shape, the inner peripheral wall of the heat conduction module is attached to the outer peripheral wall of the battery pack, the copper pipe is arranged in the heat conduction module and is spiral, one end of the copper pipe is communicated with the first connecting port, and the other end of the copper pipe is communicated with the third connecting port;

one end of the heat exchanger is communicated with the second connecting port, and the other end of the heat exchanger is communicated with the fourth connecting port;

the cooling liquid is suitable for circularly flowing among the upper liquid storage device, the lower liquid storage device, the copper pipe, the heat exchanger and the circulating pump.

2. The power-cell-based thermal management apparatus of claim 1, wherein the thermally conductive assembly further comprises: the fin, the fin is connected on the periphery wall of copper pipe, the fin is a plurality of, and is a plurality of the fin is followed the circumference and the axial distribution of copper pipe.

3. The power-cell-based thermal management device of claim 1, wherein the thermally conductive module is a piece of paraffin material.

4. The power battery-based thermal management device according to claim 1, wherein the number of the battery packs is multiple, the multiple battery packs are arranged in multiple rows and multiple columns, the number of the heat conducting assemblies is multiple, and the multiple heat conducting assemblies and the multiple battery packs are arranged in a one-to-one correspondence manner.

5. The power cell based thermal management device of claim 4, wherein an expansion gap is provided between two adjacent heat conducting assemblies.

6. The power-cell-based thermal management apparatus of claim 1, further comprising: and the wind wheel is used for accelerating the heat exchange between the heat exchanger and the air.

7. The power cell based thermal management device of claim 1, wherein the copper tube has a hydraulic diameter of 0.01-0.2 mm.

8. The power-battery-based thermal management apparatus according to claim 1, wherein in the upper reservoir, the first connection port is an inlet, the second connection port is an outlet, and in the lower reservoir, the fourth connection port is an inlet and the third connection port is an outlet.