CN115810831A - Battery cooling device and new energy vehicle - Google Patents
Battery cooling device and new energy vehicle Download PDFInfo
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- CN115810831A CN115810831A CN202211594023.0A CN202211594023A CN115810831A CN 115810831 A CN115810831 A CN 115810831A CN 202211594023 A CN202211594023 A CN 202211594023A CN 115810831 A CN115810831 A CN 115810831A
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- 238000001816 cooling Methods 0.000 title claims abstract description 216
- 239000002826 coolant Substances 0.000 claims description 14
- 239000000110 cooling liquid Substances 0.000 description 23
- 239000007788 liquid Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a battery cooling device and a new energy vehicle, wherein the battery cooling device comprises: the cooling unit comprises a first cooling structure and a second cooling structure, the first cooling structure and the second cooling structure are respectively used for cooling the two sides of the battery, a first flow passage is formed in the first cooling structure, a second flow passage is formed in the second cooling structure, and the flow sizes of cooling media in the first flow passage and the second flow passage can be independently adjusted. According to the invention, when the temperatures of the two sides of the battery are inconsistent, the flow rates of the cooling media in the first cooling structure and the second cooling structure can be adjusted, namely the first cooling structure and the second cooling structure can respectively take away heat of the two sides of the battery in different degrees in unit time, so that the temperatures of the two sides of the battery can be kept consistent, and the problems of uneven overall temperature and poor performance of the battery are solved.
Description
Technical Field
The invention belongs to the technical field of new energy vehicles, and particularly relates to a battery cooling device and a new energy vehicle.
Background
A power battery of an electric vehicle generates a large amount of heat under specific conditions, and a safety accident occurs when the battery operates in a high capacity, rapid charging or very harsh environment and the heat in the battery cannot be effectively transferred to the outside. The power battery has high requirement on temperature, the ideal temperature is between 10 and 40 ℃, and the temperature of the power battery can be rapidly increased in the charging and discharging process, especially in the high-rate charging and discharging process, so that the performance and the safety of the battery are influenced. In addition, in extreme environments, the battery is required to reach the ideal temperature quickly. In order to ensure the working performance of the power battery and ensure that the battery is at a proper working temperature, the liquid cooling technology is widely applied to a power battery thermal management system at present. Through the bottom and the side that use cooling plate or flat tub of laminating battery, all be provided with the runner in cooling plate and the flat tub, thereby utilize the water pump to realize the cooling to the battery with the mode of heat exchange to cooling plate or flat intraductal pump-feed coolant liquid. However, an electric vehicle generally has a plurality of batteries, and the plurality of batteries are arranged together, so that the temperature of two sides of the batteries is often inconsistent, and the conventional cooling device for liquid cooling cannot adjust the flow of cooling liquid at different positions in the cooling device, that is, cannot adjust the flow correspondingly according to the temperature difference of two sides of the batteries, so that the overall temperature of the batteries is uneven, and the performance of the batteries is poor.
Disclosure of Invention
Therefore, the invention provides a battery cooling device, which can overcome the defects that the temperature of the battery in an electric automobile is easy to be inconsistent at two sides, and the conventional cooling device for liquid cooling cannot adjust the flow of cooling liquid at different positions in the cooling device, namely the flow can not be correspondingly adjusted according to the temperature difference at two sides of the battery, so that the overall temperature of the battery is not uniform, and the performance of the battery is poor.
In order to solve the above problems, the present invention provides a battery cooling device including: the cooling unit comprises a first cooling structure and a second cooling structure, the first cooling structure and the second cooling structure are respectively used for cooling two sides of the battery, a first flow passage is formed in the first cooling structure, a second flow passage is formed in the second cooling structure, and the flow sizes of cooling media in the first flow passage and the second flow passage can be independently adjusted.
In some embodiments, the cooling unit further includes a first header and a second header, the first header is disposed on the first cooling structure and is communicated with the first flow channel, and a first control valve is disposed on the first header and is configured to control a flow rate of a cooling medium in the first header; the second collecting pipe is arranged on the second cooling structure and communicated with the second flow channel, and a second control valve is arranged on the second collecting pipe and used for controlling the flow of the cooling medium in the second collecting pipe.
In some embodiments, the cooling unit further includes a third cooling structure for cooling the bottom of the battery, the third cooling structure having a third flow passage configured therein, the third cooling structure having a port communicating with the third flow passage, and the first and second cooling structures being disposed on the third cooling structure.
In some embodiments, the number of the cooling units is plural in the first direction, and the cooling units are arranged in sequence.
In some embodiments, each of the first cooling structures and each of the second cooling structures are disposed on the same third cooling structure, and the first flow passage and the second flow passage are both communicated with the third flow passage.
In some embodiments, the number of the cooling units is plural in a second direction perpendicular to the first direction, and the cooling units are arranged in sequence.
In some embodiments, each of the third cooling structures are spliced together in sequence; and/or the first collecting pipes in the same row are sequentially communicated to form a first pipeline group, and the second collecting pipes in the same row are sequentially communicated to form a second pipeline group.
In some embodiments, the battery cooling device further includes a flow guide tube, each of the first tube sets and each of the second tube sets are respectively communicated with the flow guide tube, and one end of the flow guide tube is provided with an opening.
In some embodiments, the flow conduit includes a first conduit and a second conduit, each of the first tube sets being in communication with the first conduit, one end of the first conduit having a first opening, the first control valve being disposed in the flow path of the first conduit between the first opening and the first tube set closest to the first opening; each of the second line groups is communicated with the second conduit, and the second control valve is disposed in a flow path of the second conduit between the second opening and the second line group closest to the second opening.
The invention also provides a new energy vehicle which comprises the battery cooling device.
When the temperatures of the two sides of the battery are different, the flow of cooling media in the first cooling structure and the second cooling structure can be adjusted, so that the first cooling structure and the second cooling structure can respectively take away heat of the two sides of the battery in different degrees in unit time, the temperatures of the two sides of the battery can be kept consistent, and the problems that the overall temperature of the battery is not uniform and the performance of the battery is poor are solved.
Drawings
Fig. 1 is a schematic view of a battery cooling apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a battery placed in a cooling unit of the battery cooling apparatus according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a battery cooling apparatus according to an embodiment of the present invention;
fig. 4 is an exploded schematic view of the first cooling structure and the third cooling structure of the battery cooling device of the embodiment of the present invention;
fig. 5 is a sectional view of a third cooling structure of the battery cooling device according to the embodiment of the present invention;
fig. 6 is a plan view of a first cooling structure of the battery cooling device according to the embodiment of the present invention.
The reference numerals are represented as:
1. a first cooling structure; 2. a second cooling structure; 3. a first header; 4. a second header; 5. a first control valve; 6. a second control valve; 7. a third cooling structure; 8. a port; 9. a first conduit; 10. a second conduit; 11. a battery; 12. and (7) a tab.
Detailed Description
Referring collectively to fig. 1 to 6, according to an embodiment of the present invention, there is provided a battery cooling device including: the cooling unit comprises a first cooling structure 1 and a second cooling structure 2, the first cooling structure 1 and the second cooling structure 2 are respectively used for cooling the two sides of the battery 11, a first flow passage is constructed in the first cooling structure 1, a second flow passage is constructed in the second cooling structure 2, and the flow sizes of cooling media in the first flow passage and the second flow passage can be independently adjusted. In this technical scheme, cooling medium can be liquid or gaseous, it is preferred, cooling medium is the coolant liquid, in a specific embodiment, first cooling structure 1 and second cooling structure 2 correspond two opposite side settings of battery 11 respectively, when the temperature is inconsistent appears in battery 11 both sides, because the flow size of coolant liquid can be adjusted in first cooling structure 1 and second cooling structure 2, also the heat of the different degree in battery both sides can be taken away respectively to first cooling structure 1 and second cooling structure 2 in the unit interval, make the temperature of battery 11 both sides can keep unanimous, thereby it is inhomogeneous to have solved the battery bulk temperature, the problem of battery performance variation. The first cooling structure 1 may be a cooling plate or a flat tube, and the second cooling structure 2 may also be a cooling plate or a flat tube. The top of each battery 11 is provided with two tabs 12, the battery 11 mainly generates heat through the tabs 12 and the central part of the battery 11, the two tabs 12 are respectively close to the two sides of the battery 11, and the first cooling structure 1 and the second cooling structure 2 can also take away heat generated by the two tabs 12 in time.
Fig. 6 is a top view of the first cooling structure 1, wherein the first cooling structure 1 has a plurality of first flow channels, each first flow channel penetrates through the height direction of the first cooling structure 1, and the plurality of first flow channels are distributed in parallel, so as to reduce the running resistance of the cooling liquid in the flow channels. The second cooling structure 2 also has a plurality of second flow passages, and the distribution of the flow passages therein is the same as that of the flow passages in the first cooling structure 1, and fig. 6 is also referred to. The cooling unit further comprises a first collecting pipe 3 and a second collecting pipe 4, the first collecting pipe 3 is arranged at the top of the first cooling structure 1 and is communicated with the first flow channels, a first control valve 5 is arranged on the first collecting pipe 3, and the first control valve 5 is used for controlling the flow of cooling liquid in the first collecting pipe 3. The cooling liquid in the primary flow passages may be collected into the primary header 3 at the same time, or the cooling liquid in the primary header 3 may be branched into the primary flow passages at the same time. When the first control valve 5 is capable of controlling the flow rate of the cooling liquid in the first header 3, i.e. the first control valve 5 is capable of controlling the flow rate of the cooling liquid in the first cooling structure 1. The second collecting pipe 4 is arranged at the top of the second cooling structure 2 and is communicated with the second flow channels, a second control valve 6 is arranged on the second collecting pipe 4, the second control valve 6 is used for controlling the flow of the cooling liquid in the second collecting pipe 4, the cooling liquid in the second flow channels can be collected into the second collecting pipe 4 at the same time, or the cooling liquid in the second collecting pipe 4 can be simultaneously distributed into the second flow channels, therefore, when the second control valve 6 can control the flow of the cooling liquid in the second collecting pipe 4, the flow of the cooling liquid in the second cooling structure 2 can be controlled by the second control valve 6, and therefore, the flow of the cooling liquid in the first cooling structure 1 and the flow of the cooling liquid in the second cooling structure 2 can be independently adjusted.
As a specific embodiment, the cooling unit further includes a third cooling structure 7 for cooling the bottom of the battery 11, and the first cooling structure 1 and the second cooling structure 2 are both disposed on the third cooling structure 7. The first cooling structure 1, the second cooling structure 2 and the third cooling structure 7 are combined to form a U shape, and three sides of the battery 11 are continuously surrounded, so that the cooling effect is better. Fig. 5 is a horizontal cross-sectional view of the third cooling structure 7 in a top view, the third cooling structure 7 may be a cooling plate or a flat pipe, a plurality of third flow channels are configured in the third cooling structure 7, and the third flow channels are also distributed in parallel. The third cooling structure 7 is provided with ports 8 communicated with the third flow passages, and cooling liquid can be pumped into the third cooling structure 7 from the ports 8 and can flow into the third flow passages separately.
In the present embodiment, the number of the cooling units is plural in the first direction, that is, in the length direction of the third cooling structure 7, and the cooling units are arranged in sequence, so that the battery cooling device can cool the plurality of batteries 11 at the same time.
Referring to fig. 3 and 4, each of the first cooling structures 1 and the second cooling structures 2 is provided on the same third cooling structure 7. A plurality of clamping grooves are sequentially formed in the third cooling structure 7, and each clamping groove is communicated with each third flow channel. One end of each first cooling structure 1, which is far away from the first collecting pipe 3, and one end of each second cooling structure 2, which is far away from the second collecting pipe 4, are inserted into corresponding clamping grooves, so that the first flow channel is communicated with the third flow channel, and the second flow channel is also communicated with the third flow channel. In this way, the coolant in the third cooling structure 7 can flow into each first cooling structure 1 and each second cooling structure 2 in parallel, or the coolant in each first cooling structure 1 and each second cooling structure 2 can flow into the third cooling structure 7, so that the coolant can conveniently circulate in each cooling structure. When first cooling structure 1 and second cooling structure 2 were flat pipe simultaneously, flat pipe peg graft and can also avoid flat pipe to lead to its inside runner to change because of bending in third cooling structure 7's draw-in groove, also avoided battery 11 bottom chamfer radius too little to lead to flat pipe can't rather than the problem of laminating under the state of bending. Make battery 11 and flat pipe full contact, promote the high efficiency of heat transfer.
Specifically, in a second direction perpendicular to the first direction, that is, in the width direction of the third cooling structure 7, the number of the cooling units is plural, and the cooling units are arranged in sequence, so that the cooling device can further cool more batteries 11.
Referring to fig. 1 and 3 in combination, when the number of the cooling units is plural in the width direction of the third cooling structure 7, the connection condition of each third cooling structure 7 is: the third cooling structures 7 are sequentially spliced together, the third flow passages in the third cooling structures 7 are not communicated with each other, and the respective cooling liquid circulates in the respective flow passages. The connection condition of each first header 3 and each second header 4 is: the first collecting pipes 3 in the same row are sequentially communicated to form a first pipeline group, and the flow of cooling liquid in the first collecting pipes 3 in the same row can be controlled only by one first control valve 5; the second collecting pipes 4 in the same row are sequentially communicated to form a second pipeline group, and the flow of the cooling liquid in the second collecting pipes 4 in the same row can be controlled by only one second control valve 6.
In this embodiment, the battery cooling device further includes a flow guide tube, each of the first tube sets and each of the second tube sets are respectively communicated with the flow guide tube, and one end of the flow guide tube has an opening. Therefore, the cooling liquid in each first collecting pipe 3 and each second collecting pipe 4 can be conveniently converged to the flow guide pipe and then flows to the outside from the opening of the flow guide pipe, so as to form circulation; or the liquid is divided into the first collecting pipes 3 and the second collecting pipes 4 by the guide pipe and then flows out of the ports 8 of the third cooling structures 7, thereby forming circulation.
As shown in fig. 1, as a more preferable scheme, the flow guide pipe comprises a first pipe 9 and a second pipe 10, one end of the first pipe 9 is provided with a first opening, when each first pipeline group is communicated with the first pipe 9, only one first control valve 5 is arranged on the flow path of the first pipe 9 between the first opening and the first pipeline group closest to the first opening, so that the flow in all the first cooling structures 1 in the battery cooling device can be controlled simultaneously; when each second pipe set is communicated with the second pipe 10, only one second control valve 6 needs to be arranged on the flow path of the second pipe 10 between the second opening and the second pipe set closest to the second opening, so that the flow in all the second cooling structures 2 in the battery cooling device can be controlled simultaneously, and the using number of the control valves is saved. Preferably, the height of the first cooling structure 1 is different from the height of the second cooling structure 2, so that the first pipe groups and the second pipe groups can be conveniently communicated with the first guide pipe 9 and the second guide pipe 10 respectively.
Specifically, the cooling liquid in the battery cooling device may be pumped in from the port 8 of each third cooling structure 7 by a water pump, and then the cooling liquid flows through each third flow channel, flows into each first flow channel and each second flow channel in parallel, flows into each first pipe group and each second pipe group respectively, is collected into the first conduit 9 and the second conduit 10 respectively, and finally flows out from the first opening and the second opening respectively; of course, the coolant may be pumped from the first opening and the second opening by a water pump, and then the coolant flows into the first conduit 9 and the second conduit 10, then flows into the first conduit group and the second conduit group in parallel, then flows into the first flow channels and the second flow channels, and then is collected into the third flow channels, and finally flows out from the ports 8. In the cooling process, when the temperature of the battery 11 changes, the temperatures on the two sides of the battery 11 are fed back to the control system through the temperature sensors, and if the temperature difference between the two sides of the battery 11 is large, the control system controls the opening degree of the first control valve 5 or the second control valve 6, so that the flow rates of the cooling liquid in each first cooling structure 1 and each second cooling structure 2 are correspondingly adjusted, and the temperature consistency of the two sides of the battery 11 is further ensured. For example, when the temperature of the side of the battery 11 facing the first cooling structure 1 is high, the opening degree of the first control valve 5 can be controlled to increase, so that the flow rate in the first cooling structure 1 is increased, and the temperature reduction of the side is accelerated; the opening degree of the second control valve 6 can also be reduced, so that the flow rate in the second cooling structure 2 is reduced, the temperature reduction of one side of the battery 11 facing the second cooling structure 2 is slowed down, and the temperature consistency of the two sides of the battery 11 is finally realized. The control system can also control the power of the water pump and the opening degrees of the first control valve 5 and the second control valve 6 at the same time, if the overall temperature of the battery 11 is reduced within an ideal range, the power of the water pump is controlled to be reduced or the opening degrees of the two control valves are reduced, and if the overall temperature of the battery 11 is higher than the ideal range of the battery cell, the power of the water pump is controlled to be increased or the opening degrees of the two control valves are increased.
According to an embodiment of the invention, the new energy vehicle is also provided, and the new energy vehicle comprises the battery cooling device.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. A battery cooling device is characterized by comprising a cooling unit, wherein the cooling unit comprises a first cooling structure (1) and a second cooling structure (2), the first cooling structure (1) and the second cooling structure (2) are respectively used for cooling two sides of a battery (11), a first flow passage is constructed in the first cooling structure (1), a second flow passage is constructed in the second cooling structure (2), and the flow sizes of cooling media in the first flow passage and the second flow passage can be independently adjusted.
2. The cell cooling device according to claim 1, wherein the cooling unit further comprises a first collecting pipe (3) and a second collecting pipe (4), the first collecting pipe (3) is disposed on the first cooling structure (1) and is communicated with the first flow passage, a first control valve (5) is disposed on the first collecting pipe (3), and the first control valve (5) is used for controlling the flow rate of the cooling medium in the first collecting pipe (3); the second collecting pipe (4) is arranged on the second cooling structure (2) and communicated with the second flow channel, a second control valve (6) is arranged on the second collecting pipe (4), and the second control valve (6) is used for controlling the flow of the cooling medium in the second collecting pipe (4).
3. The battery cooling device according to claim 2, wherein the cooling unit further comprises a third cooling structure (7) for cooling the bottom of the battery (11), a third flow passage is configured in the third cooling structure (7), a port (8) communicating with the third flow passage is formed in the third cooling structure (7), and the first cooling structure (1) and the second cooling structure (2) are both arranged on the third cooling structure (7).
4. The battery cooling device according to claim 3, wherein the number of the cooling units is plural in the first direction, and the cooling units are arranged in sequence.
5. The battery cooling device according to claim 4, wherein each of the first cooling structures (1) and each of the second cooling structures (2) are disposed on the same third cooling structure (7), and the first flow channel and the second flow channel are communicated with the third flow channel.
6. The battery cooling device according to claim 5, wherein the number of the cooling units is plural in a second direction perpendicular to the first direction, and the cooling units are arranged in sequence.
7. A battery cooling arrangement according to claim 6, characterised in that the third cooling structures (7) are spliced together in sequence; and/or the first collecting pipes (3) in the same row are sequentially communicated to form a first pipeline group, and the second collecting pipes (4) in the same row are sequentially communicated to form a second pipeline group.
8. The battery cooling device according to claim 7, further comprising a flow guide pipe, wherein each of the first pipe groups and each of the second pipe groups are respectively communicated with the flow guide pipe, and one end of the flow guide pipe is provided with an opening.
9. A battery cooling device according to claim 8, characterized in that the flow guide pipe comprises a first conduit (9) and a second conduit (10), each of the first tube groups is communicated with the first conduit (9), one end of the first conduit (9) has a first opening, and the first control valve (5) is provided in the flow path of the first conduit (9) between the first opening and the first tube group closest to the first opening; each second pipeline group is communicated with the second conduit (10), one end of the second conduit (10) is provided with a second opening, and the second control valve (6) is arranged on the flow path of the second conduit (10) between the second opening and the second pipeline group closest to the second opening.
10. A new energy vehicle characterized by comprising the battery cooling device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211594023.0A CN115810831A (en) | 2022-12-13 | 2022-12-13 | Battery cooling device and new energy vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211594023.0A CN115810831A (en) | 2022-12-13 | 2022-12-13 | Battery cooling device and new energy vehicle |
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| Publication Number | Publication Date |
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| CN115810831A true CN115810831A (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211594023.0A Pending CN115810831A (en) | 2022-12-13 | 2022-12-13 | Battery cooling device and new energy vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117199625A (en) * | 2023-11-07 | 2023-12-08 | 深圳市昂佳科技有限公司 | Self-cooling lithium iron phosphate battery pack |
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2022
- 2022-12-13 CN CN202211594023.0A patent/CN115810831A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117199625A (en) * | 2023-11-07 | 2023-12-08 | 深圳市昂佳科技有限公司 | Self-cooling lithium iron phosphate battery pack |
| CN117199625B (en) * | 2023-11-07 | 2024-02-02 | 深圳市昂佳科技有限公司 | Self-cooling lithium iron phosphate battery pack |
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