A new energy vehicle battery that is easy to cool

Abstract

The present application relates to a new energy vehicle battery that is easy to cool, and relates to the technical field of new energy vehicle batteries. The vehicle battery includes a base, an outer frame, a partition, a placement bin, a cooling mechanism, a cover plate, and a feeding mechanism. The cooling mechanism includes: a cooling pipe, multiple groups of cooling pipes are used to pass coolant, and gas passes through an air cooling channel. The cooling pipes on the opposite sides of the battery cells and the medium flow directions in the air cooling channel are opposite; a detector is used to detect the temperature values ​​of multiple groups of battery cells and control the start and stop of the feeding mechanism. An acceleration component is used to improve the cooling efficiency of the cooling pipe on the battery cell. The present application improves the overall temperature distribution of the battery cell to be more uniform by making the cooling pipes at the opposite ends of the battery cell and the medium flow directions in the air cooling channel opposite. At the same time, according to the temperature value of the battery cell detected by the detector, only the cooling mechanism is selectively turned on, and the cooling mechanism and the acceleration component are turned on at the same time, so as to select different cooling modes according to the temperature of the battery cell, thereby improving the cooling efficiency of the battery.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicle batteries, and in particular to a new energy vehicle battery that is easy to cool. Background Art

[0002] As one of the important core components of electric vehicles, the performance of batteries directly affects the performance of electric vehicles. The power battery box used in electric vehicles is composed of multiple rows of battery cells connected in series and parallel. A large amount of heat will be generated during the discharge of the battery, which will increase the overall temperature of the battery box. When the temperature is too high, it will seriously affect the performance and life of the battery, and even directly cause the battery to fail. At the same time, during discharge, the heat release or uneven heat dissipation of each battery cell in the battery box can easily lead to temperature differences in the battery box. Batteries with higher local temperatures will age faster, and long-term operation will destroy the consistency of the battery pack, causing the battery pack to fail. Effective heat dissipation and cooling management of the battery so that the internal temperature of the battery box is evenly distributed when the battery box is working, and the temperature of the entire battery box is maintained within the optimal operating temperature range of the battery, is crucial to improving battery performance and extending battery life.

[0003] Existing battery cooling devices are mostly divided into air cooling and liquid cooling. The air cooling mode mainly forces cold air to flow through the battery surface for heat exchange cooling. It is difficult to achieve a good heat dissipation effect by relying solely on natural air cooling; while liquid cooling mostly uses parallel flow channels, which are located in parallel between each battery cell. The coolant is diverted and the cooling effect is greatly reduced; some manufacturers' liquid cooling uses serial flow channels, and the cooling plate is installed in a serpentine shape in the gap between the battery cells. This serial flow channel greatly increases the system pressure loss of the liquid cooling system. After the coolant has completed cooling in the front half of the cold pipe, the temperature of the coolant flowing to the back half of the cold plate rises significantly, and the cooling effect is significantly reduced, which can easily cause uneven temperature distribution in the battery box, destroy the consistency of the battery pack, and easily cause the battery pack to fail after long-term operation.

[0004] Moreover, the existing battery cooling devices are generally single air cooling or liquid cooling devices. When air cooling or liquid cooling is used for heat dissipation, there is often a situation where the heat dissipation effect is single and the heat dissipation efficiency is low, thereby reducing the service life of the battery. When the battery is not heated or overheated, the existing heat dissipation device cannot adjust the heat dissipation efficiency according to the degree of heat generation of the battery.

[0005] In summary, the existing electric vehicle battery cooling technology has the following main disadvantages: 1. Only a single heat dissipation mode is used for heat dissipation, resulting in low heat dissipation efficiency; 2. The cooling effect of the cooling water in the flow channel to the second half of the serpentine cold plate decreases significantly. Although the cooling effect is obvious in the first half, it cannot be sustained to the second half. This situation is particularly obvious after the car has been running for a long time, resulting in uneven temperature distribution inside the battery box.

[0006] Therefore, the present invention provides a new electric vehicle battery cooling device to solve this problem. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present application provides a new energy vehicle battery that is easy to cool, which can effectively reduce the problem of uneven battery cooling and improve the cooling efficiency of the battery.

[0008] The present application provides a new energy vehicle battery that is easy to cool, which adopts the following technical solution: A new energy vehicle battery that is easy to cool, comprising a base for placing multiple groups of battery cells, an outer frame for covering the battery cells is provided on the base, a partition for separating adjacent battery cells is provided on the base, the outer frame and the partition are in contact with each other and form a placement bin for placing the battery cells, the outer frame and the partition are hollow inside and are provided with a cooling mechanism for cooling the multiple groups of battery cells, a cover plate for sealing the placement bin is provided on the outer frame, a feeding mechanism for providing a cooling medium to the cooling mechanism is provided on the base, and the cooling mechanism comprises: Cooling pipes, multiple groups of cooling pipes are arranged in an outer frame or a partition and are used for cooling liquid to pass through, and the hollow areas between the cooling pipes and the outer frame or the partition form air cooling channels for gas to pass through, and the cooling pipes on the opposite side of the battery cell and the medium in the air cooling channel flow in opposite directions; The detector is arranged on the base and used to detect the temperature values ​​of the multiple groups of battery cells. The detector is electrically connected to the feeding mechanism and used to control the start and stop of the feeding mechanism.

[0009] The accelerating component is arranged on the cooling pipe and shortens the flow time of the cooling liquid in the cooling pipe. The accelerating component is electrically connected to the detector.

[0010] By adopting the above technical scheme, since the cooling tubes at the opposite ends of the battery cell and the medium flow directions in the air cooling channel are opposite, the overall temperature distribution of the battery cell is more uniform. At the same time, according to the temperature value of the battery cell detected by the detector, only the cooling mechanism is selectively turned on, or the cooling mechanism and the acceleration component are turned on at the same time, so that different cooling modes are selected according to the battery cell temperature, thereby improving the cooling efficiency of the battery.

[0011] Further, the feeding mechanism comprises: A liquid supply assembly, the liquid supply assembly is arranged on the base and is used to provide cooling liquid to the multiple groups of cooling pipes; An air supply component is arranged on the base and is used for providing cold air into the air cooling channel.

[0012] By adopting the above technical scheme, the air supply component provides cold air to the air cooling channel to air cool the battery, and the liquid supply component provides coolant to the cooling pipe to liquid cool the battery. The liquid supply component and the air supply component are selectively turned on according to the battery cell temperature value detected by the detector, so as to select different cooling modes according to the battery cell temperature, thereby improving the cooling efficiency of the battery.

[0013] Furthermore, the cooling tubes on both sides of the battery core are divided into a first tube and a second tube according to the flow direction of the coolant, and the liquid supply assembly includes: a first liquid supply member, which is disposed on the base and is used to pump the coolant into the first tube; a second liquid supply member, which is disposed on the cover plate and is used to pump the coolant into the second tube; A first cooler, the first cooler is arranged on the base, and the first cooler is used to cool the coolant discharged from the second tube and then discharge it into the first liquid supply member; The second cooler is arranged on the cover plate and is used for cooling the cooling liquid discharged from the first tube and then discharging it into the second liquid supply member.

[0014] By adopting the above technical solution, the first liquid supply component discharges the coolant into the first tube to cool the front side of the battery cell. The coolant that absorbs heat in the first tube enters the second cooler to cool the coolant. The cooled coolant is then discharged into the second liquid supply component to cool the back side of the battery cell. Finally, the coolant discharged from the second tube is cooled by the first cooler, thereby finally cooling the opposite side walls of the battery cell.

[0015] Further, the acceleration component includes: A reversing valve, the reversing valve is arranged on the base, the inlet end of the reversing valve is respectively connected to the outlet of the first liquid supply member and the inlet of the first cooler, the outlet end of the reversing valve is respectively connected to the first pipe and the second pipe, the reversing valve is used to switch the connection between the first liquid supply member and the first pipe and the second pipe, and the reversing valve is used to switch the connection between the first cooler and the first pipe and the second pipe; A discharge pipe, one end of which is disposed on the middle of the second pipe and communicated with the interior of the second pipe, and one end of which is away from the middle of the second pipe is respectively communicated with the liquid inlets of the first cooler and the second cooler through two groups of first branch pipes; A feed pipe, the feed pipe is arranged on the middle part of the first pipe and communicated with the interior of the first pipe, and one end of the feed pipe away from the middle part of the first pipe is respectively communicated with the discharge ports of the first liquid supply member and the second liquid supply member through two groups of second branch pipes; A first valve, which is disposed on the discharge pipe and is used to control the opening or closing of the discharge pipe; A second valve, which is disposed on the feed pipe and is used to control the opening or closing of the feed pipe; A controller is electrically connected to the reversing valve, the first valve and the second valve respectively and controls the start and stop simultaneously.

[0016] By adopting the above technical solution, when the controller opens the reversing valve, the first valve and the second valve at the same time, the reversing valve makes the first liquid supply part communicate with the inside of the second tube, and the first cooler communicate with the inside of the first tube; the first valve is opened to make the discharge pipe communicate with the middle of the second tube, the first liquid supply part and the second liquid supply part pump coolant into both ends of the second tube respectively, and the coolant flows into the discharge pipe from the middle of the second tube and is discharged into the first cooler and the second cooler through the first branch pipe; the second valve is opened to make the feed pipe communicate with the middle of the first tube, the first liquid supply part and the second liquid supply part discharge the coolant into the feed pipe through two groups of second branch pipes, and finally flows from the middle of the first tube to both ends of the first tube, and enters the first cooler and the second cooler respectively; at this time, since the travel of the coolant in the first tube or the second tube is halved, the cooling effect of the coolant on the battery cell is improved.

[0017] Further, the cold air duct outside the first tube is a first duct, the cold air duct outside the second tube is a second duct, and the air supply assembly includes: a first air supply member, which is disposed on the base and is used to provide cold air into the first channel; The second air supply member is arranged on the cover plate and is used for providing cold air into the second channel.

[0018] By adopting the above technical solution, the first air supply member is used to provide cold air into the first channel to cool the front of the battery, and the second air supply member is used to provide cold air into the second channel to reversely cool the back of the battery, thereby improving the cooling effect on the battery and reducing the problem of uneven battery cooling.

[0019] Furthermore, the detector turns on only the gas supply component or turns on both the gas supply component and the liquid supply component according to the detected temperature value. When the temperature value detected by the detector is greater than the set value, the controller simultaneously starts the reversing valve, the first valve and the second valve.

[0020] By adopting the above technical solution, when the detector detects a low temperature value, air cooling is performed only through the air supply component. When the detector detects a high temperature value, the battery is cooled by the cooperation of the air supply component and the liquid supply component, thereby improving the cooling efficiency of the battery.

[0021] Furthermore, a plurality of groups of metal wires are arranged at intervals on the outer frame and the partition near the battery core, the metal wires are in contact with the outer side wall of the battery core, and the metal wires extend into the cooling pipe or the air cooling channel respectively away from the battery core.

[0022] By adopting the above technical solution, since there is a gap between the battery cell and the side wall of the placement compartment, the heat of the battery cell cannot be well transferred to the outer frame and the partition. Through multiple groups of metal wires, the heat transfer effect between the battery cell and the outer frame and the partition is better. At the same time, the metal wires are respectively extended into the cooling pipe or the air cooling channel, which improves the cooling effect of the coolant or cold air on the metal wire, and ultimately improves the cooling efficiency of the battery.

[0023] Furthermore, the cover plate comprises: a second cooling layer, wherein a second cooling cavity is disposed inside the second cooling layer, a second cooling main pipe is disposed inside the second cooling cavity, the second cooling main pipe is communicated with the interior of the plurality of second pipes and is used to discharge the coolant discharged from the second liquid supply member into the plurality of second pipes, and the second cooling cavity is communicated with the plurality of second channels and is used to discharge the cool air discharged from the second air supply member into the plurality of second channels; a second heat dissipation layer, the second heat dissipation layer is arranged on an end of the second cooling layer away from the placement bin, a second heat dissipation cavity is arranged in the second heat dissipation layer, a second heat dissipation main pipe is arranged in the second heat dissipation cavity, the second heat dissipation main pipe is connected with the interior of the plurality of first tubes and is used to collect the coolant discharged from the plurality of first tubes and discharge it into the second cooler, the second heat dissipation cavity is connected with the plurality of first channels and is used to discharge the hot air after absorbing the heat in the first channels; A second heat insulation board is disposed between the second cooling layer and the second heat dissipation layer and is used to prevent heat exchange between the second cooling layer and the second heat dissipation layer.

[0024] By adopting the above technical scheme, the second cooling main pipe is connected to the second liquid supply part and distributes the cooling liquid discharged by the second liquid supply part evenly into multiple groups of second tubes. At the same time, the second cooling chamber distributes the cold air discharged by the second air supply part evenly into multiple groups of second channels, so as to facilitate cooling of the battery; the second heat dissipation main pipe is used to collect the cooling liquid after absorbing heat in multiple groups of first tubes and discharge it into the second cooler for cooling treatment. At the same time, the second heat dissipation chamber collects the hot air in multiple groups of first channels and discharges it uniformly. The second heat insulation plate is used to prevent heat transfer between the second cooling layer and the second heat dissipation layer, so as to facilitate cooling and cooling of multiple sides of multiple groups of battery cells.

[0025] Furthermore, the cooling pipe is arranged in a serpentine shape, the cross section of the cooling pipe is rectangular, and a plurality of groups of fins are arranged on one side of the cooling pipe close to the air cooling channel.

[0026] By adopting the above technical solution, the contact area between the cooling tube and the battery cell is increased by setting the cooling tube in a serpentine shape, which facilitates cooling the battery cell. At the same time, the contact area between the cooling tube and the cold air is increased by multiple groups of fins, which facilitates improving the cooling effect of air cooling.

[0027] Furthermore, two groups of cooling tubes are arranged on the opposite side walls of the partition, and the two groups of cooling tubes cool the battery cells on the opposite sides of the partition respectively, and the serpentine bending directions of the two groups of cooling tubes are opposite.

[0028] By adopting the above technical solution, two groups of cooling pipes cool the battery cells on opposite sides of the partition, thereby improving the cooling effect on the battery cells. By making the serpentine bending directions of the two groups of cooling pipes opposite, it is convenient for air cooling and liquid cooling to cooperate with each other, thereby improving the cooling effect on the battery.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: 1. By making the cooling pipes at opposite ends of the battery cell and the medium flow directions in the air cooling channel opposite to each other, the temperature of the entire battery cell is made uniform through lateral heat transfer at the same height of the battery cell, so as to achieve a better overall cooling effect of the battery cell; 2. By selectively turning on only the air supply component, turning on the air supply component and the liquid supply component at the same time, or turning on the air supply component, the liquid supply component and the acceleration component at the same time according to the temperature value of the battery cell detected by the detector, different cooling modes are selected according to the battery cell temperature, thereby improving the cooling efficiency of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view of the new energy vehicle battery that is easy to cool according to the present application; Figure 2 yes Figure 1 Schematic diagram of the cross section of AA; Figure 3 yes Figure 2 The enlarged schematic diagram of the middle part B; Figure 4 yes Figure 2 Schematic cross-section of the CC; Figure 5 is a schematic diagram of the coolant flow of the present application, which shows the coolant flow direction when the first valve, the second valve, and the reversing valve are not opened; Figure 6 is a schematic diagram of the coolant flow of the present application, which shows the coolant flow direction when the first valve, the second valve, and the reversing valve are opened; Figure 7 This is a schematic diagram of the structure of a new energy vehicle battery that is easy to cool according to the present application, wherein the second liquid supply member and the second cooler are not shown; Figure 8 It is a schematic diagram of the structure of the second cooling main pipe and the second heat dissipation main pipe of the present application.

[0031] Reference numerals: 1, base; 11, first cooling layer; 12, first heat dissipation layer; 13, first heat insulation board; 14, third heat insulation board; 2, outer frame; 21, air cooling channel; 211, first channel; 212, second channel; 3, partition; 31, storage bin; 4, cover; 41, second cooling layer; 411, second cooling main pipe; 42, second heat dissipation layer; 421, second heat dissipation main pipe; 43, second heat insulation board; 5, cooling mechanism; 5 1. Cooling pipe; 511. First pipe; 512. Second pipe; 6. Feeding mechanism; 61. Liquid supply assembly; 611. First liquid supply part; 612. Second liquid supply part; 613. First cooler; 614. Second cooler; 62. Air supply assembly; 7. Acceleration assembly; 71. Discharge pipe; 711. First branch pipe; 712. First main pipe; 72. Feeding pipe; 721. Second branch pipe; 722. Second main pipe; 73. Reversing valve. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-8 This application is described in further detail.

[0033] The embodiment of the present application discloses a new energy vehicle battery that is easy to cool.

[0034] Reference Figure 1 and Figure 2 A new energy vehicle battery that is easy to cool includes a base 1 for placing multiple groups of battery cells, an outer frame 2 for covering the battery cells is provided on the base 1, a partition 3 for separating adjacent battery cells is provided on the base 1, the outer frame 2 and the partition 3 are in contact with each other and form a placement chamber 31 for placing the battery cells, the outer frame 2 and the partition 3 are hollow inside and are provided with a cooling mechanism 5 for cooling the multiple groups of battery cells, a cover plate 4 for sealing the placement chamber 31 is provided on the outer frame 2, and a feeding mechanism 6 for providing a cooling medium to the cooling mechanism 5 is provided on the base 1.

[0035] Reference Figure 1 and Figure 2 The cooling mechanism 5 includes a cooling pipe 51 and a detector. A plurality of cooling pipes 51 are provided. The plurality of cooling pipes 51 are installed at intervals in the outer frame 2 or the partition 3. The cooling pipes 51 are used for passing the coolant. The cooling pipes 51 and the hollow area of ​​the outer frame 2 or the partition 3 form an air-cooling channel 21 for passing the gas, wherein the cooling pipes 51 on the opposite side of the battery cell and the medium flow directions in the air-cooling channel 21 are opposite; the detector is fixedly installed on the base 1, and the detector is used for real-time monitoring of the temperature values ​​of the plurality of battery cells. The detector is electrically connected to the feeding mechanism 6, and the detector is used for controlling the start and stop of the feeding mechanism 6.

[0036] Reference Figure 2 , Figure 3 and Figure 4The cooling tube 51 is arranged in a serpentine shape, and the cross-section of the cooling tube 51 is rectangular. A plurality of groups of fins are arranged on the side of the cooling tube 51 close to the air-cooling channel 21, and the heat in the cooling tube 51 is conveniently transferred to the air-cooling channel 21 through the plurality of groups of fins. In the present embodiment, the outer frame 2 is only close to the placement bin 31 inside, so the cooling tube 51 is only arranged on the side of the outer frame 2 close to the placement bin 31. Since the partition 3 is in contact with the two groups of placement bins 31 on opposite sides respectively, a group of cooling tubes 51 is fixedly installed on the opposite side walls of the same partition 3, and the coolant in the two groups of cooling tubes 51 flows in the same direction. In order to further improve the cooling effect of the air-cooling channel 21 in the partition 3, the serpentine bending directions of the two groups of cooling tubes 51 are opposite. The battery cell of the present embodiment is a rectangular battery cell plate structure with a relatively thin thickness.

[0037] Reference Figure 1 and Figure 2 The feeding mechanism 6 includes a liquid supply component 61 and an air supply component 62. The liquid supply component 61 is arranged on the base 1. The liquid supply component 61 is used to provide coolant to multiple groups of cooling tubes 51. The cooling tubes 51 on both sides of the battery cell are divided into a first tube 511 and a second tube 512 according to the flow direction of the internal coolant. The liquid supply component 61 includes a first liquid supply part 611, a second liquid supply part 612, a first cooler 613 and a second cooler 614. The first liquid supply part 611 is fixedly installed on the base 1. The first liquid supply will be used to pump the low-temperature coolant into the first tube 511. ; The second liquid supply component 612 is fixedly installed on the cover plate 4, and the second liquid supply component 612 is used to pump low-temperature coolant into the second tube 512; the first cooler 613 is fixedly installed on the base 1, and the first cooler 613 is used to cool the coolant discharged from the second tube 512 and then discharge it into the first liquid supply component 611; the second cooler 614 is fixedly installed on the cover plate 4, and the second cooler 614 is used to cool the coolant discharged from the first tube 511 and then discharge it into the second liquid supply component 612; the liquid supply component and the cooler of this embodiment are an integrated structure.

[0038] Reference Figure 1 and Figure 2 Specifically, when the battery cell needs to be liquid-cooled, the first liquid supply component 611 and the second liquid supply component 612 are started at the same time to discharge the coolant into the first tube 511 and the second tube 512, and then the coolant discharged from the second tube 512 re-enters the first liquid supply component 611 after dissipating heat and cooling through the first cooler 613, and the coolant discharged from the first tube 511 re-enters the second liquid supply component 612 after dissipating heat and cooling through the second cooler 614, so that the coolant forms a circulation; at the same time, since the first tube 511 and the second tube 512 are respectively located on opposite sides of the battery cell, and the coolant in the first tube 511 and the second tube 512 flow in opposite directions, the lateral heat transfer at the same height of the battery cell makes the overall temperature of the battery cell uniform, so that the overall cooling effect of the battery cell is better.

[0039] Reference Figure 1 and Figure 2 The air supply component 62 is arranged on the base 1, and the air supply component 62 is used to provide cold air to the air cooling channel 21. The cold air channel outside the first tube 511 is the first channel 211, and the cold air duct outside the second tube 512 is the second channel 212. The air supply component 62 includes a first air supply member and a second air supply member. The first air supply member is fixedly installed on the base 1, and the first air supply is used to provide cold air to the first channel 211; the second air supply member is fixedly installed on the cover plate 4, and the second air supply member is used to provide cold air to the second channel 212; the cold air flows in the first channel 211 and the second channel 212, and then takes away the heat emitted by the battery cell, so as to achieve cooling of the battery cell; the first air supply member and the second air supply member of this embodiment are fans fixedly installed on the base 1 and the cover plate 4, and the speed of the fan is adjustable.

[0040] Reference Figure 2-Figure 5The cooling mechanism 5 also includes an acceleration component 7, which is arranged on the cooling tube 51. The acceleration component 7 is used to shorten the flow time of the coolant in the cooling tube 51. The acceleration component 7 is electrically connected to the detector. The acceleration component 7 includes a reversing valve 73, a discharge pipe 71, a feed pipe 72, a first valve, a second valve and a controller. The reversing valve 73 is fixedly installed on the base 1. The two groups of inlet ends of the reversing valve 73 are respectively connected to the outlet of the first liquid supply part 611 and the inlet of the first cooler 613. The two groups of outlet ends of the reversing valve 73 are respectively connected to the inside of the first tube 511 and the second tube 512. The reversing valve 73 is used to cross-replace the two groups of inlet ends and the inside of the two groups of outlet ends. When the reversing valve 73 is closed, the outlet of the first liquid supply member 611 is connected to the interior of the first tube 511, and the inlet of the first cooler 613 is connected to the interior of the second tube 512. When the reversing valve 73 is started, the outlet of the first liquid supply member 611 is connected to the interior of the second tube 512, and the inlet of the first cooler 613 is connected to the interior of the first tube 511. One end of the discharge pipe 71 is fixedly installed on the middle part of the second tube 512 and is connected to the interior of the second tube 512. The end of the discharge pipe 71 away from the middle part of the second tube 512 is connected to the liquid inlet of the first cooler 613 and the second cooler 614 respectively through two groups of first branch pipes 711. One end of the feed pipe 72 is fixedly installed on the first tube 511 and is connected to the inside of the first tube 511, and one end of the feed pipe 72 away from the middle of the first tube 511 is connected to the discharge ports of the first liquid supply member 611 and the second liquid supply member 612 through two sets of second branch pipes 721 respectively; the first valve is fixedly installed on the discharge pipe 71, and the first valve is used to control the opening or closing of the discharge pipe 71; the second valve is fixedly installed on the feed pipe 72, and the second valve is used to control the opening or closing of the feed pipe 72; the controller is fixedly installed on the base 1, and the controller is electrically connected to the reversing valve 73, the first valve and the second valve respectively, and the controller is used to simultaneously control the start and stop of the reversing valve 73, the first valve and the second valve; the first valve of this embodiment A liquid supply component 611 and a second liquid supply component 612 each include a tank body and a liquid discharge pump, wherein the first liquid supply component 611 and the second liquid supply component 612 are each provided with two groups of liquid discharge pumps, when the reversing valve 73 is not started, only one group of liquid discharge pumps is enabled, and when the reversing valve 73 is started, both groups of liquid discharge pumps are enabled, so that when the reversing valve 73 is started, the coolant flow path in the first tube 511 and the second tube 512 is halved but the flow speed remains unchanged; in this embodiment, multiple groups of first branch pipes 711 close to one side of the cover plate 4 are connected to the second cooler 614 after being collected through the first main pipe 712, and multiple groups of second branch pipes 721 are connected to the second liquid supply component 612 after being collected through the second main pipe 722.

[0041] Reference Figure 2-Figure 6Specifically, the controller opens the reversing valve 73, the first valve and the second valve at the same time. The reversing valve 73 is opened, so that the first liquid supply component 611 is connected to the inside of the second tube 512, and the first cooler 613 is connected to the inside of the first tube 511. At the same time, the first valve is opened to connect the discharge pipe 71 with the middle of the second tube 512. The cooling liquid is pumped into both ends of the second tube 512 through the first liquid supply component 611 and the second liquid supply component 612 respectively. The cooling liquid flows into the discharge pipe 71 from the middle of the second tube 512, and the cooling liquid in the discharge pipe 71 is discharged into the first cooler 613 and the second cooler 614 through the two groups of first branch pipes 711 for cooling. At the same time, the second The valve is opened so that the feed pipe 72 is connected to the middle part of the first tube 511, and is connected to the discharge ports of the first liquid supply component 611 and the second liquid supply component 612 through two groups of second branch pipes 721, respectively, so that the coolant discharged from the first liquid supply component 611 and the second liquid supply component 612 enters the feed pipe 72 together through the two groups of second branch pipes 721, and then enters the middle part of the first tube 511 through the feed pipe 72, and finally flows from the middle part of the first tube 511 to the two ends of the first tube 511, and enters the first cooler 613 and the second cooler 614 respectively; at this time, since the travel of the coolant in the first tube 511 or the second tube 512 is halved, the cooling effect of the coolant on the battery cell is improved.

[0042] Reference Figure 1 and Figure 2 In order to improve the heat transfer effect between the battery cell and the cooling tube 51 and the air cooling channel 21, multiple groups of metal wires are installed at intervals on the outer frame 2 and the partition 3 close to the battery cell. One end of the metal wire is in contact with the side wall of the battery cell. The heat transfer effect between the battery cell and the outer frame 2 and the partition 3 is improved through the metal wire. At the same time, the metal wire also improves the tightness of the connection between the battery cell and the placement compartment 31; the side of the metal wire away from the battery cell extends into the cooling tube 51 or the air cooling channel 21 respectively, thereby improving the cooling effect on the battery cell; the metal wire of this embodiment adopts copper wire with good thermal conductivity and certain flexibility.

[0043] Reference Figure 1 , Figure 2 and Figure 8The cover plate 4 is fixedly installed above the outer frame 2 and the partition 3, and the cover plate 4 closes the top of the multiple groups of placement bins 31. The cover plate 4 includes a second cooling layer 41, a second heat dissipation layer 42 and a second heat insulation plate 43. The second cooling layer 41 abuts against the top of the outer frame 2 and the partition 3. A second cooling cavity is opened inside the second cooling layer 41. A second cooling main pipe 411 is fixedly installed in the second cooling cavity. The second cooling main pipe 411 is connected to the inside of the multiple groups of second tubes 512. The end of the second cooling main pipe 411 away from the second tube 512 is connected to the second liquid supply part 612. The second cooling main pipe 411 is used to evenly discharge the coolant discharged from the second liquid supply part 612 into the multiple groups of second tubes 512; at the same time, the second cooling cavity is connected to the multiple groups of second channels 212, and the second cooling cavity is connected to the second air supply part, so as to evenly discharge the cold air discharged from the second air supply part into the multiple groups of second channels 212.

[0044] Reference Figure 1 , Figure 2 and Figure 8 , the second heat dissipation layer 42 is arranged on the end of the second cooling layer 41 away from the placement bin 31, a second heat dissipation cavity is opened in the second heat dissipation layer 42, a second heat dissipation main pipe 421 is fixedly installed in the second heat dissipation cavity, the second heat dissipation main pipe 421 is communicated with the inside of the second cooler 614, the end of the second heat dissipation main pipe 421 away from the second cooler 614 is communicated with the inside of the multiple groups of first pipes 511, the second heat dissipation main pipe 421 is used to collect the coolant discharged from the multiple groups of first pipes 511 and discharge it into the second cooler 614; the second heat dissipation cavity is communicated with the inside of the multiple groups of first channels 211, the second heat dissipation cavity is used to collect and discharge the hot air after absorbing heat in the multiple groups of first channels 211; wherein the second heat dissipation cavity is connected with the inside of the multiple groups of first channels 211; The second heat dissipation cavity is connected to the interior of the multiple groups of first channels 211 through a hollow connecting block. The second heat dissipation main pipe 421 is connected to the first pipe 511 through a connecting pipe. The connecting pipe is located in the hollow area inside the connecting block. The connecting block needs to pass through the second cooling layer 41 to enter the second heat dissipation layer 42. In order to transfer the heat of the first connecting block to the second cooling layer 41 when passing through the second cooling layer 41, an insulation layer is coated on the outer wall of the connecting block to prevent the heat in the connecting block from being transferred to the second cooling layer 41; the second insulation plate 43 is fixedly installed between the second cooling layer 41 and the second heat dissipation layer 42. The second insulation plate 43 is used to prevent heat exchange between the second cooling layer 41 and the second heat dissipation layer 42.

[0045] Reference Figure 1 , Figure 2 and Figure 8The structures of the base 1 and the cover plate 4 are symmetrical to each other. The base 1 includes a first cooling layer 11, a first heat dissipation layer 12 and a first heat insulation board 13. A first cooling cavity is provided in the first cooling layer 11. A first cooling main pipe communicating with the interior of the plurality of first tubes 511 is provided in the first cooling cavity. The first cooling main pipe is used to communicate one outlet of the reversing valve 73 with the interior of the plurality of first tubes 511; the first cooling cavity is communicated with the plurality of first channels 211, and the first cooling cavity is used to discharge the cold air discharged from the first air supply member into the plurality of first channels 211; the first heat dissipation layer 12 is provided on one end of the first cooling layer 11 away from the placement bin 31, a first heat dissipation cavity is provided in the first heat dissipation layer 12, a first heat dissipation main pipe is fixedly installed in the first heat dissipation cavity, the first heat dissipation main pipe is communicated with the interior of the plurality of second tubes 512, and the outlet of the first heat dissipation main pipe is communicated with the interior of another outlet of the reversing valve 73; the first heat dissipation cavity is communicated with the interior of the plurality of second channels 212, and the first heat dissipation cavity is used to collect and discharge the hot air discharged from the plurality of second channels 212.

[0046] Reference Figure 1-Figure 8 Specifically, when the reversing valve 73 is closed, the first liquid supply component 611 is connected to the interior of the first cooling main pipe, and the first heat dissipation main pipe is connected to the interior of the first cooler 613; when the reversing valve 73 is opened, the first liquid supply component 611 is connected to the interior of the first heat dissipation main pipe, and the first cooler 613 is connected to the interior of the first cooling main pipe; because the coolant temperatures inside the first cooling main pipe and the first heat dissipation main pipe are different when the reversing valve 73 is opened or closed, the outside of the first cooling main pipe in the first cooling cavity and the outside of the first heat dissipation main pipe in the first heat dissipation cavity are both covered with a heat insulation layer, and at the same time, a third heat insulation plate 14 is fixedly installed near one end of the first cooling layer 11 in the cavity.

[0047] Reference Figure 1 and Figure 4 The two groups of first branch pipes 711 pass through the base 1 and the cover plate 4 to communicate with the first cooler 613 and the second cooler 614 respectively, and the two groups of second branch pipes 721 pass through the base 1 and the cover plate 4 to communicate with the first liquid supply member 611 and the second liquid supply member 612 respectively.

[0048] Reference Figure 1-Figure 8 The detector turns on only the gas supply component 62 or both the gas supply component 62 and the liquid supply component 61 according to the detected temperature value. When the detector detects that the temperature value is greater than the set value, the controller simultaneously starts the reversing valve 73, the first valve and the second valve. The detector is provided with a starting temperature value, a first temperature value and a second temperature value in sequence from low to high.

[0049] Specifically, when the detector detects that the battery cell temperature is greater than the starting temperature and lower than the first temperature, only the air supply component 62 is started, and cold air is blown into the first channel 211 through the first air supply member, and cold air is blown into the second channel 212 through the second air supply member, so as to achieve cooling of the battery cell, wherein the blowing speed of the cold air by the first air supply member and the second air supply member gradually increases with the increase of the temperature value detected by the detector, and when the detector detects that the battery cell temperature reaches the first temperature value, the first air supply member and the second air supply member are at the maximum wind speed.

[0050] When the detector detects that the temperature value of the battery cell is greater than the first temperature value and less than the second temperature value, the first liquid supply component 611, the second liquid supply component 612, the first cooler 613 and the second cooler 614 are turned on while ensuring the maximum wind speed of the first air supply component and the second air supply component, and the coolant is discharged into the first tube 511 through the first cooling component, and then the heat on the front of the battery cell is absorbed and then enters the second cooler 614 to cool the coolant, and then the second cooler 614 discharges the cooled coolant into the second tube 512 through the second liquid supply component 612, and finally the heat on the back of the battery cell is absorbed and then enters the first cooler 613 to cool the coolant, and the battery cell is cooled and cooled by air cooling and liquid cooling; wherein the discharge speed of the coolant by the first liquid supply component 611 and the second liquid supply gradually increases with the increase of the temperature value detected by the detector, but the discharge speed of the first liquid supply pump and the second liquid supply pump is the same.

[0051] When the detector detects that the temperature value of the battery cell is greater than the second temperature value, the controller opens the reversing valve 73, the first valve and the second valve, and the first liquid supply component 611 and the second liquid supply component 612 pump the coolant into the feed pipe 72 through the two groups of second branch pipes 721, and then discharge it into the middle of the first pipe 511, and finally discharge the coolant that has absorbed heat into the first cooler 613 and the second cooler 614 through the two ends of the first pipe 511 for cooling; the first liquid supply component 611 and the second liquid supply component 612 pump the coolant into the second pipe 512 through the two ends of the second pipe 512, and then discharge the coolant that has absorbed heat through the discharge pipe 71 in the middle of the second pipe 512, and discharge it into the first cooler 613 and the second cooler 614 through the two groups of first branch pipes 711 for cooling; in this process, the flow path of the coolant in the first pipe 511 and the second pipe 512 is shortened, thereby improving the cooling efficiency of the coolant on the battery cell.

[0052] The working principle of the embodiment of the present application is as follows: Since the medium flow directions in the cooling tubes 51 and the air cooling channel 21 at opposite ends of the battery cell are opposite, the overall temperature distribution of the battery cell is more uniform. At the same time, according to the temperature value of the battery cell detected by the detector, only the air supply component 62 is selectively turned on, the air supply component 62 and the liquid supply component 61 are turned on at the same time, or the air supply component 62, the liquid supply component 61 and the acceleration component 7 are turned on at the same time. In this way, different cooling modes are selected according to the battery cell temperature, thereby improving the cooling efficiency of the battery.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A new energy vehicle battery that is easy to cool, characterized in that: The invention comprises a base (1) for placing a plurality of groups of battery cells, the base (1) being provided with an outer frame (2) for covering the battery cells, the base (1) being provided with a partition (3) for separating adjacent battery cells, the outer frame (2) and the partition (3) being in contact with each other and forming a placement chamber (31) for placing the battery cells, the outer frame (2) and the partition (3) being hollow inside and provided with a cooling mechanism (5) for cooling the plurality of groups of battery cells, the outer frame (2) being provided with a cover plate (4) for sealing the placement chamber (31), the base (1) being provided with a feeding mechanism (6) for providing a cooling medium to the cooling mechanism (5), the cooling mechanism (5) comprising: Cooling tubes (51), a plurality of groups of cooling tubes (51) are arranged at intervals in the outer frame (2) or the partition (3) and are used for cooling liquid to pass through, the cooling tubes (51) and the hollow area in the outer frame (2) or the partition (3) form an air cooling channel (21) for gas to pass through, and the cooling tubes (51) on the opposite side of the battery cell and the medium in the air cooling channel (21) flow in opposite directions; A detector, the detector being arranged on the base (1) and used to detect the temperature values ​​of the plurality of groups of battery cells, the detector being electrically connected to the feeding mechanism (6) and used to control the start and stop of the feeding mechanism (6); An accelerating component (7) is arranged on the cooling tube (51) and shortens the flow time of the cooling liquid in the cooling tube (51); the accelerating component (7) is electrically connected to the detector.

2. A new energy vehicle battery that is easy to cool according to claim 1, characterized in that: The feeding mechanism (6) comprises: A liquid supply component (61), the liquid supply component (61) being arranged on the base (1) and used to supply cooling liquid to the multiple groups of cooling tubes (51); An air supply component (62) is arranged on the base (1) and is used to provide cold air into the air cooling channel (21).

3. A new energy vehicle battery that is easy to cool according to claim 2, characterized in that: The cooling tubes (51) on both sides of the battery core are divided into a first tube (511) and a second tube (512) according to the flow direction of the coolant, and the liquid supply component (61) comprises: A first liquid supply component (611), the first liquid supply component (611) being arranged on the base (1) and used for pumping cooling liquid into the first tube (511); a second liquid supply member (612), the second liquid supply member (612) being arranged on the cover plate (4) and being used to pump coolant into the second tube (512); A first cooler (613), the first cooler (613) being arranged on the base (1), and the first cooler (613) being used to cool the cooling liquid discharged from the second tube (512) and then discharge the cooling liquid into the first liquid supply member (611); A second cooler (614), the second cooler (614) being arranged on the cover plate (4), the second cooler (614) being used to cool the coolant discharged from the first tube (511) and then discharge the coolant into the second liquid supply member (612).

4. A new energy vehicle battery that is easy to cool according to claim 3, characterized in that: The acceleration component (7) comprises: a reversing valve (73), the reversing valve (73) being arranged on the base (1), the two groups of inlet ends of the reversing valve (73) being respectively connected to the outlet of the first liquid supply member (611) and the inlet of the first cooler (613), the two groups of outlet ends of the reversing valve (73) being respectively connected to the first pipe (511) and the second pipe (512), the reversing valve (73) being used for cross-changing the internal connections between the two groups of inlet ends and the two groups of outlet ends; a discharge pipe (71), one end of the discharge pipe (71) being arranged on the middle of the second pipe (512) and communicating with the interior of the second pipe (512), and one end of the discharge pipe (71) away from the middle of the second pipe (512) being respectively communicated with the liquid inlets of the first cooler (613) and the second cooler (614) through two groups of first branch pipes (711); a feed pipe (72), the feed pipe (72) being arranged on the middle portion of the first pipe (511) and being in communication with the interior of the first pipe (511); an end of the feed pipe (72) away from the middle portion of the first pipe (511) being in communication with the discharge ports of the first liquid supply member (611) and the second liquid supply member (612) respectively through two groups of second branch pipes (721); a first valve, the first valve being arranged on the discharge pipe (71) and being used to control the opening or closing of the discharge pipe (71); a second valve, the second valve being arranged on the feed pipe (72) and being used to control the opening or closing of the feed pipe (72); A controller is electrically connected to the reversing valve (73), the first valve and the second valve respectively and controls start and stop simultaneously.

5. The new energy vehicle battery that is easy to cool according to claim 3 is characterized in that: The cold air duct outside the first tube (511) is a first channel (211), the cold air duct outside the second tube (512) is a second channel (212), and the air supply assembly (62) comprises: A first air supply component, the first air supply component being arranged on the base (1) and being used to provide cold air into the first channel (211); A second air supply member, the second air supply member is arranged on the cover plate (4) and is used to provide cold air into the second channel (212).

6. The new energy vehicle battery that is easy to cool according to claim 4 is characterized in that: The detector activates only the gas supply component (62) or activates both the gas supply component (62) and the liquid supply component (61) according to the detected temperature value, and activates the reversing valve (73), the first valve, and the second valve simultaneously through the controller when the temperature value detected by the detector is greater than a set value.

7. The new energy vehicle battery that is easy to cool according to claim 1, characterized in that: The outer frame (2) and the partition (3) are provided with a plurality of groups of metal wires at intervals on a side close to the battery core, the metal wires abut against the outer side wall of the battery core, and the metal wires extend into the cooling pipe (51) or the air cooling channel (21) on a side away from the battery core.

8. The new energy vehicle battery that is easy to cool according to claim 5, characterized in that: The cover plate (4) comprises: a second cooling layer (41), wherein a second cooling cavity is disposed inside the second cooling layer (41), wherein a second cooling main pipe (411) is disposed inside the second cooling cavity, wherein the second cooling main pipe (411) is connected to the interior of the plurality of second pipes (512) and is used to discharge the cooling liquid discharged from the second liquid supply member (612) into the plurality of second pipes (512), and wherein the second cooling cavity is connected to the plurality of second channels (212) and is used to discharge the cooling air discharged from the second air supply member into the plurality of second channels (212); a second heat dissipation layer (42), the second heat dissipation layer (42) being arranged on an end of the second cooling layer (41) away from the placement bin (31), a second heat dissipation cavity being arranged in the second heat dissipation layer (42), a second heat dissipation main pipe (421) being arranged in the second heat dissipation cavity, the second heat dissipation main pipe (421) being connected to the interior of the plurality of first tubes (511) and being used for collecting coolant discharged from the plurality of first tubes (511) and discharging it into the second cooler (614), the second heat dissipation cavity being connected to the plurality of first channels and being used for discharging hot air after absorbing heat in the first channels; A second heat insulation plate (43), wherein the second heat insulation plate (43) is arranged between the second cooling layer (41) and the second heat dissipation layer (42) and is used to prevent heat exchange between the second cooling layer (41) and the second heat dissipation layer (42).

9. The new energy vehicle battery that is easy to cool according to claim 1, characterized in that: The cooling pipe (51) is arranged in a serpentine shape, the cross section of the cooling pipe (51) is rectangular, and a plurality of groups of fins are arranged on one side of the cooling pipe (51) close to the air cooling channel (21).

10. A new energy vehicle battery that is easy to cool according to claim 9, characterized in that: Two groups of cooling tubes (51) are arranged on opposite side walls of the partition (3), and the two groups of cooling tubes (51) respectively cool the battery cells on opposite sides of the partition (3), and the serpentine bending directions of the two groups of cooling tubes (51) are opposite.

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