CN113644336B - Battery box and battery pack with same - Google Patents
Battery box and battery pack with same Download PDFInfo
- Publication number
- CN113644336B CN113644336B CN202010339067.3A CN202010339067A CN113644336B CN 113644336 B CN113644336 B CN 113644336B CN 202010339067 A CN202010339067 A CN 202010339067A CN 113644336 B CN113644336 B CN 113644336B
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- Prior art keywords
- liquid
- cooling plate
- tray
- inlet
- liquid cooling
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- 239000007788 liquid Substances 0.000 claims abstract description 272
- 238000001816 cooling Methods 0.000 claims abstract description 161
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 230000003993 interaction Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery box and a battery pack with the same, comprising: the top and the bottom of the tray are both open, the tray is provided with a tray edge beam, and a liquid inlet and a liquid outlet are formed on the tray edge beam; the liquid cooling plate is connected to the bottom of the tray, and the liquid cooling plate and the tray jointly define a containing cavity for containing a plurality of electric cores, and a liquid cooling plate inlet and a liquid cooling plate outlet are formed in the liquid cooling plate; the liquid cooling device comprises a liquid cooling plate, a liquid cooling plate inlet, a liquid cooling plate outlet, a liquid cooling plate, a first connecting hose and a second connecting hose, wherein the first connecting hose is used for being connected between the liquid cooling plate inlet and the liquid inlet, and the second connecting hose is used for being connected between the liquid cooling plate outlet and the liquid outlet. According to the battery pack disclosed by the invention, the first connecting hose and the second connecting hose can absorb the relative displacement generated by the liquid inlet and the liquid outlet and the liquid cooling plate in a vibration environment, so that the liquid cooling plate is prevented from forming interaction force on the liquid inlet and the liquid outlet under the vibration condition, the tightness of the battery pack can be effectively ensured, and the precision requirement of the battery pack in an assembly link is reduced.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a battery box and a battery pack with the same.
Background
The liquid cooling plate is a device used for adjusting the temperature of the electric core in the battery pack. The liquid cooling plate is generally arranged at the top or the bottom of the battery cell in the tray of the battery pack, and heat energy transfer is accelerated through the flow of liquid in the liquid cooling plate, so that the heating and cooling requirements of the battery cell are met.
In the related art, a liquid inlet pipe and a liquid outlet pipe of the tray are connected with a tray edge beam on the side face of the tray in a welding mode, so that the tightness of the battery pack is ensured. However, the liquid inlet pipe and the liquid outlet pipe are welded above the liquid cooling plate, so that the liquid cooling plate and the tray cannot be separated. Meanwhile, welding slag is easy to splash when the liquid inlet pipe and the liquid outlet pipe of the tray are welded with the tray side beam, the welding slag cannot be too close to the battery cell during welding, and air tightness detection is required after welding, so that the welding process is required to be completed before a battery pack assembly working section, inconvenience is brought to the assembly of the battery pack, and meanwhile, the tray side beam hinders laser welding of the battery cell in the battery pack.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a battery box, which can absorb the relative displacement generated by the liquid inlet and the liquid outlet and the liquid cooling plate in the vibration environment, and reduce the accuracy requirement of the battery pack in the assembly link.
Another object of the present invention is to provide a battery pack having the above battery case.
According to an embodiment of the first aspect of the present invention, a battery pack includes: the top and the bottom of the tray are both open, the tray is provided with a tray edge beam, and a liquid inlet and a liquid outlet are formed on the tray edge beam; the liquid cooling plate is connected to the bottom of the tray, the liquid cooling plate and the tray jointly define a containing cavity for containing a plurality of electric cores, and a liquid cooling plate inlet and a liquid cooling plate outlet are formed in the liquid cooling plate; the liquid cooling device comprises a liquid cooling plate inlet, a liquid cooling plate outlet, a liquid inlet, a liquid outlet, a first connecting hose and a second connecting hose, wherein the first connecting hose is used for being connected between the liquid cooling plate inlet and the liquid inlet, and the second connecting hose is used for being connected between the liquid cooling plate outlet and the liquid outlet.
According to the battery pack disclosed by the embodiment of the invention, the first connecting hose is connected between the liquid cooling plate inlet and the liquid inlet, and the second connecting hose is connected between the liquid cooling plate outlet and the liquid outlet, so that the first connecting hose and the second connecting hose can absorb the relative displacement generated by the liquid inlet and the liquid outlet and the liquid cooling plate in a vibration environment, and the liquid cooling plate is prevented from forming interaction force on the liquid inlet and the liquid outlet under the vibration condition, so that the tightness of the battery pack can be effectively ensured, and the precision requirement of the battery pack in an assembly link is reduced.
According to some embodiments of the invention, two ends of the first connecting hose are respectively provided with a first quick connector for connecting with the liquid cooling plate inlet and the liquid inlet, and two ends of the second connecting hose are respectively provided with a second quick connector for connecting with the liquid cooling plate outlet and the liquid outlet.
According to some embodiments of the invention, the first quick connector and the second quick connector each comprise a male connector and a female connector that are detachably connected; the liquid inlet and the liquid outlet are respectively provided with a liquid pipe, the cross section of one end of the liquid pipe is rectangular and positioned in the accommodating cavity, the other end of the liquid pipe extends out of the accommodating cavity, and one of the male connector and the female connector is arranged on the side surface or the bottom surface of one end of the liquid pipe; one end of the first connecting hose and one end of the second connecting hose are provided with the other one of the male connector and the female connector so as to be matched with the one of the male connector and the female connector on the liquid pipe.
According to some embodiments of the invention, when the side surface of the one end of the liquid pipe is provided with the one of the male connector and the female connector, the liquid inlet and the liquid cooling plate inlet are staggered in the height direction of the tray, and the liquid outlet and the liquid cooling plate outlet are staggered in the height direction of the tray.
According to some embodiments of the invention, the distance between the liquid inlet and the liquid outlet is greater than the distance between the liquid cooling plate inlet and the liquid cooling plate outlet.
According to some embodiments of the invention, the liquid-cooled plate inlet and the liquid-cooled plate outlet are respectively provided with a liquid-cooled plate pipe section, the liquid-cooled plate pipe sections of the liquid-cooled plate inlet and the liquid-cooled plate outlet are both arranged on the upper surface of the liquid-cooled plate, and the liquid-cooled plate pipe section comprises one of the male connector and the female connector; the other ends of the first connecting hose and the second connecting hose are provided with the other one of the male connector and the female connector.
According to some embodiments of the invention, the other end of the liquid tube has a circular cross-sectional shape.
According to some embodiments of the invention, two ends of the first connecting hose are respectively in threaded connection with the liquid cooling plate inlet and the liquid inlet, and two ends of the second connecting hose are respectively in threaded connection with the liquid cooling plate outlet and the liquid outlet.
According to some embodiments of the invention, two ends of the first connecting hose are respectively provided with a first joint, and the shapes of the two first joints are different; two ends of the second connecting hose are respectively provided with a second joint, and the shapes of the two second joints are different.
According to some embodiments of the invention, the first and second connection hoses are plastic hoses.
According to some embodiments of the invention, the bottom surface of the tray is formed with a plurality of first connection holes spaced along the circumferential direction of the tray, the liquid cooling plate is formed with a plurality of second connection holes vertically opposite to the plurality of first connection holes, and a plurality of screw fasteners or rivets pass through the plurality of second connection holes and the plurality of first connection holes to connect the liquid cooling plate to the bottom of the tray.
According to some embodiments of the invention, the bottom surface of the tray is formed with at least one groove extending annularly along the circumference of the tray, the groove is located radially inward of the plurality of first connection holes, and glue is filled in the groove to seal a gap between the tray and the liquid cooling plate.
According to some embodiments of the invention, the liquid inlet and the liquid outlet are located on one of the short sides of the tray, and the liquid-cooled plate inlet and the liquid-cooled plate outlet are located at one end of the liquid-cooled plate adjacent to the short side.
A battery pack according to an embodiment of the second aspect of the present invention includes: a battery box according to the embodiment of the first aspect of the present invention; the battery cells are arranged in the accommodating cavity of the battery box side by side.
According to some embodiments of the invention, both ends of all the battery cells extend in the width direction of the tray to two long sides adjacent to the tray.
Additional aspects and advantages of the invention 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 invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of a battery box according to an embodiment of the present invention;
fig. 2 is a top view of a battery box according to an embodiment of the present invention;
fig. 3 is an exploded view of a battery case according to an embodiment of the present invention;
fig. 4 is an exploded view of another angle of the battery box according to an embodiment of the present invention;
fig. 5 is an exploded view of a battery pack according to an embodiment of the present invention;
fig. 6 is a schematic view of a battery pack according to an embodiment of the present invention;
fig. 7 is a top view of a battery pack according to an embodiment of the present invention.
Reference numerals:
100: a battery box;
1: a tray; 11: tray side beams; 111: a liquid inlet; 112: a liquid outlet;
12: a liquid pipe; 13: a first connection hole; 14: a groove;
2: a liquid cooling plate; 21: a liquid cooling plate inlet; 22: a liquid cooling plate outlet;
23: a liquid cooling plate pipe section; 24: a second connection hole;
3: a first connection hose; 31: a first joint;
4: a second connection hose; 41: a second joint;
5: a first quick connector; 6: a second quick connector;
200: a battery pack; 201: and a battery cell.
Detailed Description
Embodiments of the present invention will be described in detail below, by way of example with reference to the accompanying drawings.
A battery case 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 7.
As shown in fig. 1 to 7, a battery box 100 according to an embodiment of the first aspect of the present invention includes a tray 1, a liquid cooling plate 2, a first connection hose 3, and a second connection hose 4.
Specifically, the top and bottom of the tray 1 are both open, the side surface of the tray 1 is provided with a tray edge beam 11, and a liquid inlet 111 and a liquid outlet 112 are formed on the tray edge beam 11. The liquid cooling plate 2 is connected to the bottom of the tray 1, and the liquid cooling plate 2 and the tray 1 together define a receiving cavity for receiving a plurality of electric cells 201. The liquid cooling plate 2 is formed with a liquid cooling plate inlet 21 and a liquid cooling plate outlet 22, a first connection hose 3 is used for being connected between the liquid cooling plate inlet 21 and the liquid inlet 111, and a second connection hose 4 is used for being connected between the liquid cooling plate outlet 22 and the liquid outlet 112.
For example, in the examples of fig. 1 to 7, the liquid inlet 111 and the liquid outlet 112 are disposed at intervals on the tray edge beam 11 on one side of the tray 1 in the length direction, and the liquid cooling plate 2 is mounted on the bottom of the tray 1, so that the bottom plate of the tray 1 can be replaced by the liquid cooling plate 2, the energy density of the battery pack 200 can be improved, and the battery cell 201 can be placed on the liquid cooling plate 2 to be in direct contact with the liquid cooling plate 2, so that heat exchange with the liquid cooling plate 2 can be better performed. A containing cavity is defined between the liquid cooling plate 2 and the tray 1, a plurality of electric cores 201 are positioned in the containing cavity, and one side of the liquid cooling plate 2 adjacent to the liquid inlet 111 and the liquid outlet 112 of the tray boundary beam 11 is provided with a liquid cooling plate inlet 21 and a liquid cooling plate outlet 22 which are spaced from each other. The liquid cooling plate inlet 21 and the liquid inlet 111 are connected through the first connecting hose 3, and the liquid cooling plate outlet 22 and the liquid outlet 112 are connected through the second connecting hose 4. Therefore, the materials of the first connecting hose 3 and the second connecting hose 4 are softer, and the first connecting hose 3 can deform, so that the first connecting hose 3 can absorb the relative displacement generated by the liquid inlet 111 and the liquid cooling plate inlet 21 in a vibration environment, the second connecting hose 4 can absorb the relative displacement generated by the liquid outlet 112 and the liquid cooling plate outlet 22 in the vibration environment, the liquid cooling plate 2 can be prevented from forming interaction force on the liquid inlet 111 and the liquid outlet 112 in the vibration environment, the problem of liquid leakage between the first connecting hose 3 and the liquid inlet 111 and the liquid cooling plate inlet 21 and between the second connecting hose 4 and the liquid outlet 112 and the liquid cooling plate outlet 22 is avoided, meanwhile, the manufacturing tolerance and assembly tolerance of the liquid cooling plate 2 and the liquid inlet 111 and the liquid cooling plate outlet 112 in the manufacturing process can be effectively absorbed, the assembly difficulty is reduced, the assembly failure is reduced, and the precision requirement of the battery pack 100 in the assembly link can be reduced.
According to the battery box 100 of the embodiment of the invention, the first connecting hose 3 is connected between the liquid cooling plate inlet 21 and the liquid inlet 111, the second connecting hose 4 is connected between the liquid cooling plate outlet 22 and the liquid outlet 112, the first connecting hose 3 and the second connecting hose 4 can absorb the relative displacement generated by the liquid inlet 111 and the liquid outlet 112 and the liquid cooling plate 2 in a vibration environment, and the liquid cooling plate 2 is prevented from forming interaction force on the liquid inlet 111 and the liquid outlet 112 in the vibration environment, so that the tightness of the battery box 100 can be effectively ensured, and meanwhile, the precision requirement of the battery box 100 in an assembly link is reduced.
According to some embodiments of the present invention, as shown in fig. 3 and 4, the first connection hose 3 is provided at both ends with a first quick connector 5 for connection with the liquid cooling plate inlet 21 and the liquid inlet 111, respectively, and the second connection hose 4 is provided at both ends with a second quick connector 6 for connection with the liquid cooling plate outlet 22 and the liquid outlet 112, respectively. From this, through set up first quick-operation joint 5 respectively at the both ends of first coupling hose 3, the both ends of second coupling hose 4 set up second quick-operation joint 6 respectively, through quick-operation joint's switching, realized the purpose that tray 1 and liquid cooling board 2 can separate for tray 1 and liquid cooling board 2 can mutually independent, are located the part on the tray boundary beam 11 simultaneously and can weld in advance, have improved welded convenience, have ensured welded reliability and gas tightness. Moreover, the difficulty in assembling the first connection hose 3 and the second connection hose 4 can be reduced, the assembly efficiency can be improved, and the qualification rate of the battery box 100 can be improved. In addition, the first connecting hose 3 and the second connecting hose 4 can deform themselves, so that manufacturing tolerances and assembly tolerances in the manufacturing process of the liquid cooling plate 2, the liquid inlet 111 and the liquid outlet 112 can be effectively absorbed. It is understood that the specific structures and working principles of the first and second quick connectors 5 and 6 are well known to those skilled in the art, and will not be described herein.
Further, referring to fig. 3 and 4, the first quick connector 5 and the second quick connector 6 each include a male connector and a female connector which are detachably connected, the liquid inlet 111 and the liquid outlet 112 are respectively provided with a liquid pipe 12, one end of the liquid pipe 12 has a rectangular cross section and is located in the accommodating chamber, the other end of the liquid pipe 12 extends out of the accommodating chamber, one of the male connector and the female connector is provided on a side surface or a bottom surface of the one end of the liquid pipe 12, and the other of the male connector and the female connector is provided on one end of the first connection hose 3 and the second connection hose 4 to be engaged with the one of the male connector and the female connector on the liquid pipe 12.
For example, in the example of fig. 3 and 4, the side of the end of the liquid pipe 12 located in the receiving chamber may be provided with one of a male connector and a female connector, and the cross-sectional shape of the end is rectangular, thereby facilitating the assembly of the male connector or the female connector. When the side surface of the one end of the liquid pipe 12 is provided with a male connector, one end of the first connecting hose 3 and the second connecting hose 4 connected with the liquid pipe 12 is provided with a female connector; when the female connector is provided on the side of the one end of the liquid pipe 12, the male connector is provided on the end of the first and second connection hoses 3 and 4 connected to the liquid pipe 12. Therefore, through the matching of the female connector and the male connector, and the male connector or the female connector is connected with one ends of the first connecting hose 3 and the second connecting hose 4, quick assembly can be realized, and the problem of liquid leakage of the first quick connector 5 and the second quick connector 6 caused by vibration can be further effectively solved due to good sealing performance of the first connecting hose 3 and the second connecting hose 4.
In some alternative embodiments, the cross-sectional shape of the other end of the liquid tube 12 is circular. As shown in fig. 4, the cross-sectional shape of the end of the liquid tube 12 remote from the center of the receiving chamber is circular. So as to facilitate connection of the liquid pipe 12 with components outside the battery case 100.
In some alternative embodiments, referring to fig. 3 and 6, when the side of the one end of the liquid pipe 12 is provided with one of the male connector and the female connector, the liquid inlet 111 and the liquid cooling plate inlet 21 are disposed offset in the height direction of the tray 1, and the liquid outlet 112 and the liquid cooling plate outlet 22 are disposed offset in the height direction of the tray 1. For example, in the examples of fig. 3 and 6, the liquid inlet 111 and the liquid-cooling plate inlet 21 are disposed non-directly in the up-down direction, and the liquid outlet 112 and the liquid-cooling plate outlet 22 are disposed non-directly in the up-down direction. Thereby, the height of the tray side rail 11 can be reduced, thereby reducing the height of the battery box 100, facilitating the miniaturization design of the battery box 100, and simultaneously facilitating the assembly and disassembly of the first connection hose 3 and the second connection hose 4.
In some alternative embodiments, as shown in fig. 3 and 6, the distance between the inlet 111 and the outlet 112 is greater than the distance between the liquid cooling plate inlet 21 and the liquid cooling plate outlet 22. In other words, the liquid cooling plate inlet 21 and the liquid cooling plate outlet 22 are located between the liquid inlet 111 and the liquid outlet 112, so that the overall structure of the battery box 100 can be more compact, and the liquid in the liquid cooling plate 2 can be effectively ensured to flow near the middle of the electric core 201, so that the heat energy transfer of the liquid in the liquid cooling plate 2 is accelerated, and the heating and cooling effects of the battery pack 200 are improved.
According to some embodiments of the present invention, referring to fig. 6, the liquid-cooling plate inlet 21 and the liquid-cooling plate outlet 22 are respectively provided with a liquid-cooling plate pipe section 23, the liquid-cooling plate pipe sections 23 of the liquid-cooling plate inlet 21 and the liquid-cooling plate outlet 22 are each provided on the upper surface of the liquid-cooling plate 2, the liquid-cooling plate pipe sections 23 include one of a male joint and a female joint, and the other ends of the first connection hose 3 and the second connection hose 4 are provided with the other one of the male joint and the female joint. Therefore, by arranging the liquid-cooling plate pipe section 23, the first connecting hose 3 and the second connecting hose 4 can be more conveniently connected with the liquid-cooling plate inlet 21 and the liquid-cooling plate outlet 22 through the corresponding liquid-cooling plate pipe section 23, and the tightness of connection is ensured.
For example, in the process of assembling the battery pack 200, the plurality of electric cells 201 may be assembled on the liquid cooling plate 2, then the electrode terminals of the plurality of electric cells 5201 are welded with the connecting pieces by laser to realize the electrical connection between the electrode terminals of the plurality of electric cells 201, and then the liquid cooling plate 2 is connected with the tray 1 through the first quick connector 5 of the first connecting hose 3 and the second quick connector 6 of the second connecting hose 4, so that the detachable assembly of the tray 1 and the liquid cooling plate 2 is realized. Therefore, compared with the traditional mode that the liquid inlet pipe and the liquid outlet pipe of the tray 1 are welded on the tray boundary beam 11, the connection mode of the first quick connector 5 and the second quick connector 6 avoids the spattering of welding slag when the liquid inlet 111 and the liquid outlet 112 are welded with the tray boundary beam 11, reduces the pollution to the battery cell 201 in the accommodating cavity, simultaneously, not only meets the sealing requirement of the liquid inlet 111 and the liquid outlet 112 and the tray 1, but also avoids the limitation brought by the later procedure of the early intervention assembly procedure of the tray 1 or the liquid cooling plate 2. It is understood that the tray 1 and the liquid cooling plate 2 may select an optimal assembly process according to the actual assembly requirement of the battery pack 200.
According to other embodiments of the present invention, two ends of the first connecting hose 3 may be screwed to the liquid cooling plate inlet 21 and the liquid inlet 111, respectively, and two ends of the second connecting hose 4 may be screwed to the liquid cooling plate outlet 22 and the liquid outlet 112, respectively. So set up, can realize the detachable assembly of tray 1 and liquid cooling board 2 equally, reduce the installation degree of difficulty of tray 1 and liquid cooling board 2, and simple structure, the processing of being convenient for, it is with low costs.
According to some embodiments of the present invention, referring to fig. 5, the first connection hose 3 has first connectors 31 at both ends thereof, respectively, the shapes of the two first connectors 31 are different, and the second connection hose 4 has second connectors 41 at both ends thereof, respectively, the shapes of the two second connectors 41 are different. By means of the arrangement, the fool-proof effect on the first connecting hose 3 and the second connecting hose 4 can be effectively achieved, and the situation that the first connecting hose 3 and the second connecting hose 4 are assembled incorrectly is avoided.
Alternatively, the first connection hose 3 and the second connection hose 4 are both plastic hoses. The plastic hose has the characteristics of good flexibility, strong corrosion resistance, high temperature resistance and the like, and can deform, so that the plastic hose can effectively absorb manufacturing tolerance and assembly tolerance in the manufacturing process of the liquid cooling plate 2 and the liquid inlet 111 and the liquid outlet 112 of the tray 1.
According to some embodiments of the present invention, the bottom surface of the tray 1 is formed with a plurality of first coupling holes 13 spaced apart along the circumferential direction of the tray 1. The liquid cooling plate 2 is formed with a plurality of second connection holes 24 vertically opposite to the plurality of first connection holes 13, and a plurality of screw fasteners (not shown) or rivets (not shown) pass through the plurality of second connection holes 24 and the plurality of first connection holes 13 to connect the liquid cooling plate 2 to the bottom of the tray 1. For example, as shown in fig. 3 to 5, the plurality of first connecting holes 13 may be uniformly spaced along the bottom surface of the tray edge beam 11, the plurality of second connecting holes 24 may be uniformly spaced along the edge circumference of the bottom surface of the liquid cooling plate 2, the plurality of first connecting holes 13 and the plurality of second connecting holes 24 are in one-to-one correspondence up and down, and the tray 1 and the liquid cooling plate 2 may be connected by a plurality of rivets penetrating between the plurality of first connecting holes 13 and the plurality of second connecting holes 24. Therefore, the connection firmness of the tray 1 and the liquid cooling plate 2 is ensured, and the tray 1 and the liquid cooling plate 2 are prevented from being separated in the use process of the battery box 100.
Further, at least one groove 14 extending annularly along the circumferential direction of the tray 1 is formed on the bottom surface of the tray 1, the groove 14 is located radially inside the plurality of first connecting holes 13, and glue is filled in the groove 14 to seal the gap between the tray 1 and the liquid cooling plate 2. For example, as shown in fig. 4, two grooves 14 extending annularly along the circumferential direction of the tray 1 are provided on the bottom surface of the tray 1, the two grooves 14 are disposed at intervals in the radial direction of the tray 1, and the two grooves 14 are each located on one side of the plurality of first connection holes 13 toward the center of the tray 1. When tray 1 and liquid cooling board 2 are installed, can be through the clearance between tray 1 and liquid cooling board 2 of encapsulating in two recesses 14 to guaranteed the gas tightness between tray 1 and the liquid cooling board 2, also further strengthened the stability that tray 1 and liquid cooling board 2 are connected simultaneously. It will be appreciated that the specific number of grooves 14 may be set according to the actual design requirements to better meet the actual application.
Further, as shown in fig. 3 and 5, the liquid inlet 111 and the liquid outlet 112 are located on one of the short sides of the tray 1, and the liquid-cooling plate inlet 21 and the liquid-cooling plate outlet 22 are located at one end of the liquid-cooling plate 2 adjacent to the short side. By this arrangement, the lengths of the first connection hose 3 and the second connection hose 4 can be effectively shortened, and the regularity of the layout of the parts in the battery case 100 can be ensured.
As shown in fig. 5 to 7, a battery pack 200 according to the second aspect of the present invention includes a battery case 100 and a plurality of battery cells 201, the battery case 100 is the battery case 100 according to the above-described first aspect of the present invention, and the plurality of battery cells 201 are arranged side by side in the accommodation chamber of the battery case 100. Therefore, the electric core 201 can be used as a beam for reinforcing the structural strength of the battery pack 200, that is, the battery pack 200 does not need to be provided with a reinforcing structure for reinforcing the structural strength, and the electric core 201 can be directly used for replacing the reinforcing structure to ensure the structural strength of the battery pack 200, so that the battery pack 200 is not easy to deform under the action of external force.
In some alternative embodiments, referring to fig. 5-7, both ends of all the cells 201 extend along the width direction of the tray 1 to adjacent both long sides of the tray 1. For example, the tray 1 may be a rectangular frame structure, and when two ends of all the battery cells 201 extend to two long sides of the tray 1 along the width direction of the tray 1, under the condition of constant volume, the surface area of the battery cells 201 is increased, so that the heat dissipation area of the battery cells 201 is increased, the heat dissipation efficiency of the battery cells 201 is improved, and the safety of the whole battery pack 200 is improved, so that the battery pack 200 is safer and more reliable.
Other constructions and operations of the battery pack 200 according to the embodiment of the present invention are known to those of ordinary skill in the art, and will not be described in detail herein.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A battery box, comprising:
the top and the bottom of the tray are both open, the tray is provided with a tray edge beam, and a liquid inlet and a liquid outlet are formed on the tray edge beam;
the liquid cooling plate is connected to the bottom of the tray, the liquid cooling plate and the tray jointly define a containing cavity for containing a plurality of electric cores, and a liquid cooling plate inlet and a liquid cooling plate outlet are formed in the liquid cooling plate;
the liquid cooling device comprises a liquid cooling plate inlet, a liquid cooling plate outlet, a liquid inlet, a liquid connecting hose and a first connecting hose, wherein the first connecting hose is used for being connected between the liquid cooling plate inlet and the liquid inlet;
the distance between the liquid inlet and the liquid outlet is greater than the distance between the liquid cooling plate inlet and the liquid cooling plate outlet.
2. The battery box of claim 1, wherein the first quick connector and the second quick connector each comprise a removably connected male connector and female connector;
the liquid inlet and the liquid outlet are respectively provided with a liquid pipe, the cross section of one end of the liquid pipe is rectangular and positioned in the accommodating cavity, the other end of the liquid pipe extends out of the accommodating cavity, and one of the male connector and the female connector is arranged on the side surface or the bottom surface of one end of the liquid pipe;
one end of the first connecting hose and one end of the second connecting hose are provided with the other one of the male connector and the female connector so as to be matched with the one of the male connector and the female connector on the liquid pipe.
3. The battery box as claimed in claim 2, wherein when the side of the one end of the liquid pipe is provided with the one of the male connector and the female connector,
the liquid inlet and the liquid cooling plate inlet are staggered in the height direction of the tray, and the liquid outlet and the liquid cooling plate outlet are staggered in the height direction of the tray.
4. The battery box according to claim 2, wherein the liquid-cooling plate inlet and the liquid-cooling plate outlet are respectively provided with a liquid-cooling plate pipe section, the liquid-cooling plate pipe sections of the liquid-cooling plate inlet and the liquid-cooling plate outlet are both provided on an upper surface of the liquid-cooling plate, and the liquid-cooling plate pipe section includes one of the male connector and the female connector;
the other ends of the first connecting hose and the second connecting hose are provided with the other one of the male connector and the female connector.
5. The battery box according to claim 2, wherein the other end of the liquid pipe has a circular cross-sectional shape.
6. The battery box according to claim 1, wherein two ends of the first connecting hose are respectively in threaded connection with the liquid cooling plate inlet and the liquid inlet, and two ends of the second connecting hose are respectively in threaded connection with the liquid cooling plate outlet and the liquid outlet.
7. The battery box according to any one of claims 1 to 6, wherein both ends of the first connection hose are respectively provided with first joints, and the shapes of the two first joints are different;
two ends of the second connecting hose are respectively provided with a second joint, and the shapes of the two second joints are different.
8. The battery box of any one of claims 1-6, wherein the first and second connection hoses are plastic hoses.
9. The battery box according to any one of claims 1 to 6, wherein a plurality of first connection holes are formed at intervals along a circumferential direction of the tray on a bottom surface of the tray, a plurality of second connection holes are formed on the liquid cooling plate to be vertically opposite to the plurality of first connection holes, and a plurality of screw fasteners or rivets pass through the plurality of second connection holes and the plurality of first connection holes to connect the liquid cooling plate to a bottom of the tray.
10. The battery box as claimed in claim 9, wherein the bottom surface of the tray is formed with at least one groove extending annularly along the circumference of the tray, the groove being located radially inward of the plurality of first connection holes, the groove being filled with a gel to seal a gap between the tray and the liquid cooling plate.
11. The battery box of claim 9, wherein the liquid inlet and the liquid outlet are located on one of the short sides of the tray, and the liquid cooling plate inlet and the liquid cooling plate outlet are located at an end of the liquid cooling plate adjacent to the short side.
12. A battery pack, comprising:
a battery box according to any one of claims 1 to 11;
the battery cells are arranged in the accommodating cavity of the battery box side by side.
13. The battery pack of claim 12, wherein both ends of all the cells extend in the width direction of the tray to adjacent both long sides of the tray.
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| CN202010339067.3A CN113644336B (en) | 2020-04-26 | 2020-04-26 | Battery box and battery pack with same |
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| CN202010339067.3A CN113644336B (en) | 2020-04-26 | 2020-04-26 | Battery box and battery pack with same |
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| CN113644336B true CN113644336B (en) | 2024-02-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115799710A (en) * | 2022-11-24 | 2023-03-14 | 厦门海辰储能科技股份有限公司 | Liquid cooling plate and energy storage device |
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| CN113644336A (en) | 2021-11-12 |
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