CN113851751A - Battery pack box structure and battery pack - Google Patents
Battery pack box structure and battery pack Download PDFInfo
- Publication number
- CN113851751A CN113851751A CN202010523875.5A CN202010523875A CN113851751A CN 113851751 A CN113851751 A CN 113851751A CN 202010523875 A CN202010523875 A CN 202010523875A CN 113851751 A CN113851751 A CN 113851751A
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- plate
- battery pack
- liquid cooling
- bottom plate
- mounting
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- 238000009434 installation Methods 0.000 claims abstract description 18
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- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000001965 increasing effect Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000110 cooling liquid Substances 0.000 description 4
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- 229910052782 aluminium Inorganic materials 0.000 description 3
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
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- 238000011900 installation process Methods 0.000 description 2
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Images
Classifications
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- 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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
Abstract
The invention is suitable for the field of power batteries, and provides a battery pack box structure and a battery pack. The frame structure is fixedly connected with the bottom plate, and a plurality of accommodating through holes used for placing the battery modules are formed in the frame structure. The liquid cooling plate is installed on one side, facing the bottom plate, of the accommodating through hole in a sealed mode, and the part, exposed out of the accommodating through hole, of the liquid cooling plate is used for bearing the battery module. According to the battery pack box body structure provided by the invention, the liquid cooling plate is hermetically arranged on one side of the accommodating through hole, which faces the bottom plate, so that the liquid cooling plate, the bottom plate and the frame are integrated, the subsequent installation procedures of the battery pack are reduced, and the part of the liquid cooling plate, which is exposed out of the accommodating through hole, is in direct contact with the battery module, so that the battery module is conveniently installed, and the heat dissipation effect is good.
Description
Technical Field
The invention belongs to the technical field of power batteries, and particularly relates to a battery pack box structure and a battery pack.
Background
The power battery is a core element of the electric automobile, and the quality and the efficiency of the power battery are directly related and influence the quality and the effect of the electric automobile. The battery pack thermal management system is a core component of the battery system, and has the main function of maintaining the battery system in a proper temperature range in the working process, so that the service performance, the thermal safety and the cycle life of the battery system are ensured.
However, the existing battery box body and the existing thermal management system are independent, the thermal management system only plays roles of cooling, heating and heat preservation, the box body only plays a role of supporting, the battery box body and the thermal management system are respectively and independently carried out during lightweight design, and are not fully integrated, in the production process of the battery pack, the battery box body and the thermal management system are separated, a station needs to be added for assembly, the assembly process is increased, and the production and assembly efficiency is not improved.
Disclosure of Invention
The embodiment of the invention aims to provide a battery pack box body structure and a battery pack, and aims to solve the technical problems that an existing battery pack box body and a thermal management system are independent, so that the assembling process is complex, and the production and assembly efficiency is not improved.
In order to achieve the above object, the present invention provides a battery pack case structure, including:
a base plate;
the frame structure is fixedly connected with the bottom plate and is provided with a plurality of accommodating through holes for accommodating the battery modules; and
and the liquid cooling plate seals one side of the accommodating through hole, which faces the bottom plate, and the part of the liquid cooling plate, which is exposed in the accommodating through hole, is used for bearing the battery module.
Through adopting above-mentioned technical scheme, seal one side of holding through-hole towards the bottom plate with the liquid cooling board, and frame fixed connection in bottom plate for the liquid cooling board forms a whole with bottom plate, frame, and in the production process of battery package, the liquid cooling board is used for bearing the battery module as a box is whole with bottom plate and frame construction, has reduced the installation process of subsequent liquid cooling board and box, has improved production efficiency. Furthermore, the part of the liquid cooling plate exposed in the accommodating through hole is in direct contact with the battery module, so that the battery module is convenient to assemble, and the heat dissipation effect is good.
Optionally, the frame structure comprises:
the frame is arranged around the bottom plate;
the first beams are arranged at intervals along a first direction and penetrate through the liquid cooling plate; and
and the second beams are arranged at intervals along a second direction forming a preset angle with the first direction and are spliced with the first beams, and the first beams and the second beams form a plurality of accommodating through holes.
Through adopting above-mentioned technical scheme, wear to locate the liquid cooling board with first roof beam, insert the second roof beam afterwards and locate on first roof beam to can be fixed in the liquid cooling board on the bottom plate, make the liquid cooling board become some additional strengthening of box, when increasing box intensity, also restricted the removal of liquid cooling board.
Optionally, the first beam comprises:
the connecting part is fixedly connected with the bottom plate; and
the first inserting part is fixedly connected with the surface of the connecting part, which is far away from the bottom plate, and a plurality of first inserting grooves are formed in the first inserting part along the length direction of the first inserting part;
and the second beam is provided with a plurality of second inserting grooves which are matched and inserted with the first inserting grooves along the width direction.
Through adopting above-mentioned technical scheme, through seting up a plurality of second inserting grooves on the second roof beam, set up first inserting groove on first grafting portion, through cooperation between them to peg graft the second roof beam together with first roof beam, and then regard as a part of box with the liquid cooling board.
Optionally, the frame includes:
the two first mounting parts are respectively connected with two opposite sides of the bottom plate and are parallel to the first beam, and the first mounting parts are vertically connected with two ends of the second beam; and
the two second mounting parts are respectively connected with two opposite ends of the bottom plate and are parallel to the second beam;
a third mounting part which is connected with the corresponding first mounting part and the second mounting part in an obtuse angle is arranged between the adjacent end parts of the first mounting part and the second mounting part;
the periphery of the liquid cooling plate is clamped between the first installation part, the third installation part and one of the second installation parts of the bottom plate and the frame.
By adopting the technical scheme, the periphery of the liquid cooling plate is clamped between the first installation part, the third installation part and one of the second installation parts of the bottom plate and the frame, and the liquid cooling plate can be fixed in the frame, so that the whole structure is compact.
Optionally, each first mounting portion includes a first mounting bar and a second mounting bar that are parallel to each other and connected to each other in the length direction, and the second mounting bar is disposed on one side of the first mounting bar away from the first beam;
the first mounting strip is provided with a first mounting surface facing the bottom plate, the second mounting strip is provided with a second mounting surface perpendicularly intersected with the first mounting surface, the first mounting surface is abutted against the edge of the liquid cooling plate, and the second mounting surface is fixedly connected with the edge of the bottom plate.
Through adopting above-mentioned technical scheme, with the edge of bottom plate and the second installation face fixed connection of second mounting bar, the edge of liquid cooling board and the second installation face butt of first mounting bar, and first installation face intersects perpendicularly with the second installation face to reserve for the certain mounted position of bottom plate and liquid cooling board, avoid taking place to interfere, make holistic structure compacter.
Optionally, the base plate comprises:
a first plate body;
the second plate body is arranged on one side of the first plate body facing the liquid cooling plate; and
the second reinforcing rib is connected between the first plate body and the second plate body.
Through adopting above-mentioned technical scheme, the bottom plate that the adoption has first plate body and second plate body to constitute can resist foreign matter impact such as bottom grit effectively, and the power that the battery module acted on the bottom plate can be transmitted to frame construction's frame through first roof beam and bottom plate on.
Optionally, the liquid cold plate comprises:
the body is provided with a flow passage;
the first joint is communicated with the inlet of the flow passage; and
the second joint is communicated with the outlet of the flow passage;
the first joint and the second joint are arranged at one end of the liquid cooling plate close to the other second mounting part.
Through adopting foretell technical scheme, connect first joint and second and set up in the same side of liquid-cooled board, compact structure, manufacturability is strong.
Optionally, an impact-proof structure is arranged on the outer side surface of the frame, and the first connector and the second connector are led out from the body, penetrate through the frame and are contained in the impact-proof structure.
By adopting the technical scheme, the first connector and the second connector are led out of the frame, so that dry-wet separation can be realized, and the first connector and the second connector are accommodated in the impact-resistant structure, so that the external impact force resistance of the box body is improved, and the first connector and the second connector are prevented from being deformed due to external force collision.
Optionally, the impact-proof structure includes a plurality of impact-proof plates disposed at intervals on the outer side of the frame, the impact-proof plates are wedge-shaped plates, and the first joint and the second joint penetrate through the frame, so that the plurality of impact-proof plates are located between the first joint and the second joint.
Through adopting above-mentioned technical scheme, be located between first joint and the second with a plurality of crashproof boards to set up crashproof board into the wedge-shaped plate, can effectively resist the impact, avoid first joint and second to connect and receive the impact and lead to warping.
The present invention also provides a battery pack, including:
the battery pack box structure is characterized in that; and
the battery module is arranged on the liquid cooling plate in the battery pack box body structure and is accommodated in the accommodating through hole.
Through adopting above-mentioned technical scheme, through adopting foretell battery package box structure, because liquid cooling board is a whole with the box to place the battery module on foretell battery package box structure's liquid cooling board, reduced subsequent liquid cooling board and the installation procedure of box, the radiating effect is good.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of a battery pack according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a second beam according to a first embodiment of the present invention;
fig. 4 is a schematic top view of a battery pack according to a first embodiment of the present invention;
FIG. 5 is a fifth schematic sectional view taken along line A-A of FIG. 4;
FIG. 6 is a partially enlarged view of portion A of FIG. 5;
FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 4;
FIG. 8 is a partially enlarged view of the portion B in FIG. 7;
FIG. 9 is an enlarged partial view of the portion C of FIG. 7;
fig. 10 is a schematic diagram illustrating an exploded structure of a battery pack according to an embodiment of the invention;
fig. 11 is a third schematic exploded view of a battery pack according to an embodiment of the present invention;
FIG. 12 is a schematic top view of a liquid cooling plate according to an embodiment of the present invention;
fig. 13 is a schematic cross-sectional structural view of a frame according to a second embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-battery pack box structure; 10-an accommodating through hole; 11-a base plate; 111-a first plate body; 112-a second plate body; 113-a second reinforcing rib; 12-a frame structure; 120-an isolated space; 121-frame; 1211 — a first mounting portion; 1212 — a second mounting portion; 1213-third mount; 1215 — a first mounting bar; 1216-a second mounting bar; 1217-first mounting face; 1218-a second mounting surface; 122 — a first beam; 1221-a connecting portion; 1222-a first mating part; 1223-a first plug-in slot; 1224 — a second lower deck; 1225-a second upper layer plate; 123-a second beam; 1230-a second mating groove; 1231-a tube; 1232-a first stiffener; 124-impact-resistant structure; 1241-crashproof plate; 125-baffle plate; 13-liquid cold plate; 130-a body; 131-a first layer plate; 132-a second ply; 133-a first joint; 134-a second linker; 135-heat exchanging part; 1351-heat exchange surface; 137-flow channel; 1371-an inlet; 1372-an outlet; 138-mounting holes; 14-an elastic pad; 15-a third beam; 151-a first lower layer plate; 152-a first upper plate; 16-a seal gasket; 2-a heat conducting pad; l1-first direction; l2-second direction.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "fixedly disposed" or "disposed" on another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The meaning of "plurality" is one, two or more unless specifically limited otherwise.
Referring to fig. 1 and fig. 2 together, a battery pack case structure 1 according to an embodiment of the present invention will be described. The battery pack box structure 1 is used for placing a battery module to be cooled, and the battery pack box structure 1 comprises a bottom plate 11, a frame structure 12 and a liquid cooling plate 13. Wherein, the frame structure 12 is fixedly connected with the bottom plate 11, and the frame structure 12 is formed with a plurality of accommodating through holes 10 for accommodating the battery modules. The side of the accommodating through hole 10 facing the bottom plate 11 is closed, and the part of the liquid cooling plate 13 exposed in the accommodating through hole 10 is used for bearing the battery module, so that the battery module is accommodated in the accommodating through hole 10.
Compared with the prior art, the battery pack box body structure 1 provided by the embodiment of the invention has the advantages that the liquid cooling plate 13 is sealed to contain the through hole 10 towards one side of the bottom plate 11, the frame structure 12 enables the liquid cooling plate 13 and the box body to be integrated, and in the production process of the battery pack, the liquid cooling plate 13, the bottom plate 11 and the frame structure 12 are used as a whole for bearing a battery module, so that the subsequent installation procedures of the liquid cooling plate 13 and the box body are reduced, and the production efficiency is improved. Further, a plurality of accommodating through holes 10 for placing the battery modules are formed in the frame structure 12, and the liquid cooling plate 13 seals one side of the accommodating through holes 10 facing the bottom plate 11, so that the part of the liquid cooling plate 13 exposed in the accommodating through holes 10 is in direct contact with the battery modules, the assembly of the battery modules is facilitated, and the heat dissipation effect is good.
In the concrete application, the cooling liquid consists of water, an antifreezing agent and an additive, and can be alcohol type, glycerin type, glycol type and other types according to different components of the antifreezing agent. And can be selected according to specific requirements.
In one embodiment of the present invention, with further reference to fig. 1 and 2, the frame structure 12 includes a rim 121, a plurality of first beams 122, and a plurality of second beams 123. Wherein, the frame 121 encloses the periphery of locating bottom plate 11, and a plurality of first roof beams 122 set up along first direction L1 interval, first roof beam 122 and bottom plate 11 fixed connection are equipped with a plurality of gaps on the liquid cooling board 13, and first roof beam 122 wears to locate the gap on the liquid cooling board 13 for liquid cooling board 13 can laminate with bottom plate 11. The plurality of second beams 123 are arranged at intervals along a second direction L2 forming a predetermined angle with the first direction L1, the second beams 123 are inserted into the first beams 122, and the plurality of first beams 122 are inserted into the plurality of second beams 123 to form a plurality of accommodating through holes 10. By passing the first beam 122 fixedly connected with the base plate 11 through the liquid cooling plate 13 and inserting the second beam 123 into the first beam 122, the liquid cooling plate 13 is fixedly mounted on the surface of the base plate 11 facing the frame structure 12, and compared with the existing structure that the box body and the liquid cooling plate 13 are separated, the liquid cooling plate 13 becomes a part of a reinforcing structure of the box body in the embodiment, so that the strength of the box body is increased, and the movement of the liquid cooling plate 13 is also limited. Meanwhile, the box body is beneficial to compact structure and light weight design.
In the present embodiment, the first direction L1 is disposed perpendicular to the second direction L2. The first direction L1 refers to a width direction along the bottom plate 11, and the second direction L2 refers to a length direction along the bottom plate 11. Of course, in other embodiments, the first direction L1 refers to a direction along the length of the bottom plate 11, and then the second direction L2 refers to a direction along the width of the bottom plate 11, which can be selected according to specific requirements.
Of course, in other embodiments, the difference from the above embodiments is that the first beam 122 may be disposed on the liquid cooling plate 13, the second beam 123 is inserted into the first beam 122, and the first beam 122 and the second beam 123 are fixed on the frame 121.
In one embodiment of the present invention, referring specifically to fig. 4 and 7, the frame 121 is a solid structure. Of course, in other embodiments, referring further to fig. 13, the frame 121 is an aluminum profile, that is, the frame 121 is a hollow structure, and a plurality of rib plates are further disposed in the frame 121. The frame 121 is made of a multi-segment structure by welding, so that the frame structure 12 becomes a main load-bearing structure of the battery pack. The bottom plate 11 is fixedly connected with the frame 121 through welding, so that the overall sealing performance and the connection reliability of the battery pack box body are realized.
In one embodiment of the present invention, with further reference to fig. 2, the first beam 122 includes a connecting portion 1221 and a first mating portion 1222. The connecting portion 1221 is fixedly connected to the bottom plate 11, the first inserting portion 1222 is fixedly connected to a surface of the connecting portion 1221 away from the bottom plate 11, a plurality of first inserting grooves 1223 are formed in the first inserting portion 1222 along a length direction of the first inserting portion 1222, a plurality of second inserting grooves 1230 are formed in the second beam 123 along a width direction of the second beam, and the second inserting grooves 1230 are inserted into the first inserting grooves 1223. The second beam 123 is provided with a plurality of second inserting grooves 1230, the first inserting groove 1223 is provided on the first inserting portion 1222, and the second beam 123 and the first beam 122 are inserted together by the cooperation of the two, so that the liquid cooling plate 13 is used as a part of the box body.
In one embodiment of the present invention, with further reference to fig. 3-6, the second beam 123 is an aluminum profile, and the second beam 123 includes a tubular body 1231 and a first reinforcing rib 1232. The first reinforcing rib 1232 is strip-shaped, and the first reinforcing rib 1232 with a strip-shaped structure is disposed in the tube body 1231 and extends along the length direction of the tube body 1231. The quantity of first strengthening rib 1232 is a plurality of, and a plurality of first strengthening ribs 1232 set up along the direction of height of body 1231 interval in proper order, can guarantee to bear the same effort and act on, and whole box structure is light and handy. Of course, in the present embodiment, the first beam 122 is also a hollow aluminum profile.
In an embodiment of the invention, referring to fig. 7 and 9, the bottom plate 11 is a double-layer plate structure, the double-layer plate structure can effectively resist the impact of foreign matters such as sand on the bottom, and the force of the battery module acting on the bottom plate 11 can be transmitted to the frame 121 of the frame structure 12 through the first beam 122 and the bottom plate 11. The bottom plate 11 includes a first plate body 111, a second plate body 112, and a second reinforcing rib 113. The second plate 112 is disposed on one side of the first plate 111 facing the frame 121, and the second stiffener 113 is connected between the first plate 111 and the second plate 112. The second reinforcing ribs 113 are strip-shaped, the second reinforcing ribs 113 extend along the length direction of the first plate body 111 and the second plate body 112, the number of the second reinforcing ribs 113 is multiple, and the plurality of second reinforcing ribs 113 are arranged at intervals along the width direction of the first plate body 111 and the second plate body 112. The second reinforcing rib 113 functions to make the bottom plate 11 strong and light in structure.
Further, referring to fig. 2 and 9, a plurality of elastic pads 14 are disposed between the liquid cooling plate 13 and the second plate 112, at least a portion of the edge of the liquid cooling plate 13 is welded to the bottom plate 11, the plurality of elastic pads 14 are laid on the bottom plate 11, and the elastic pads 14 are compressed by the liquid cooling plate 13 and the bottom plate 11 in the thickness direction thereof. Specifically, the elastic pad 14 is a member having a certain elastic supporting force, such as foam, silicone, or a spring. The elastic pad 14 is located between the liquid cooling plate 13 and the second plate 112, and plays roles of heat preservation and support, and after the liquid cooling plate 13 is placed on the elastic pad 14, the liquid cooling plate 13 is pre-pressed to a preset position through the role of the second beam 123, and the preset position can be flush with the module installation surface on the frame 121.
In one embodiment of the present invention, referring specifically to fig. 2, 4, 7, 8 and 10, the bezel 121 includes two first mounting portions 1211 and two second mounting portions 1212. The two first mounting portions 1211 are respectively disposed on two opposite sides of the bottom plate 11 and are parallel to the first beam 122, the first mounting portions 1211 are perpendicularly connected to two ends of the second beam 123, the second mounting portions 1212 are respectively connected to two opposite ends of the bottom plate 11 and are parallel to the second beam 123, a third mounting portion 1213 connected to the corresponding first mounting portion 1211 and the corresponding second mounting portion 1212 at an obtuse angle is disposed between the adjacent ends of the first mounting portion 1211 and the second mounting portion 1212, and the periphery of the liquid cooling plate 13 is clamped between the first mounting portion 1211, the third mounting portion 1213 and one of the second mounting portions 1212 of the bottom plate 11 and the frame 121. By clamping the periphery of the liquid cooling plate 13 between the bottom plate 11 and the first mounting portion 1211, the third mounting portion 1213 and one of the second mounting portions 1212 of the frame 121, the liquid cooling plate 13 can be fixed in the frame 121, so that the overall structure is compact.
In this embodiment, each of the first mounting portions 1211 includes a first mounting bar 1215 and a second mounting bar 1216 which are parallel to each other and connected to each other in a length direction, and the second mounting bar 1216 is provided on a side of the first mounting bar 1215 away from the first beam 122.
The first mounting bar 1215 has a first mounting surface 1217 facing the base plate 11, the second mounting bar 1216 has a second mounting surface 1218 perpendicularly intersecting the first mounting surface 1217, the first mounting surface 1217 abuts an edge of the liquid cooling plate 13, and the second mounting surface 1218 is fixedly connected to the edge of the base plate 11. Therefore, a certain installation position is reserved for the bottom plate 11 and the liquid cooling plate 13, and the whole structure is compact without interference between the bottom plate 11 and the liquid cooling plate 13. The bottom surface of the second mounting strip 1216 is flush with the bottom surface of the bottom plate 11, the first mounting surface 1217 is 3mm to 5mm higher than the bottom surface of the second mounting strip 1216, and in this range, the thicknesses of the bottom plate 11 and the liquid cooling plate 13 are thinner, which is beneficial to punch forming and has lighter weight. Below this range, the strength of the bottom plate 11 is affected, and above this range, the forming is not facilitated.
A gasket 16 is provided between the edge of the liquid-cooled plate 13 and the first mounting surface 1217. And the liquid cooling plate 13 is ensured to have good sealing performance with the matching surfaces between the frame 121 and the third beam 15. A plurality of mounting holes 138 are formed at the edge of the liquid cooling plate 13, so that the liquid cooling plate 13 can be conveniently mounted on the frame 121.
In one embodiment of the present invention, referring specifically to fig. 2 and 12, the direction of the arrows in fig. 12 is the flow direction of the cooling fluid. The liquid-cooled panel 13 includes a body 130, a first joint 133, and a second joint 134, wherein the body 130 includes a first laminate 131 and a second laminate 132. The first layer plate 131 is disposed on the bottom plate 11, and a plurality of runners 137 connected in parallel or in series are disposed on the first layer plate 131. The second plate 132 is disposed on a side of the first plate 131 away from the bottom plate 11 and encloses the flow channel 137, the first joint 133 is connected to the first plate 131 and an inlet 1371 of the flow channel 137, and the second joint 134 is connected to the second plate 132 and an outlet 1372 of the flow channel 137. The first layer plate 131, the second layer plate 132, the first joint 133 and the second joint 134 are respectively formed into a whole by welding (e.g., furnace brazing), and the liquid-cooled plate 13 is integrated into a whole, thereby reducing the use of pipes and quick plugs. The thickness of the first layer board 131 and the second layer board 132 does not exceed 1.5mm, so that punch forming is facilitated, and the weight is light. The first joint 133 and the second joint 134 are arranged at one end of the liquid cooling plate 13 close to the other second mounting portion 1212, and the first joint 133 and the second joint 134 are arranged on the same side.
In this embodiment, the flow channel 137 is formed on the first layer plate 131 by stamping, and the flow channel 137 is U-shaped or serpentine. Compared with the runner 137 in other shapes, the runner 137 is U-shaped, and processing and manufacturing are facilitated. The flow channel 137 is arranged in a snake shape, the path of the flow channel 137 is increased, the retention time of cooling liquid in the flow channel 137 is further prolonged, the contact area between the battery module and the cooling liquid is indirectly increased, the convection exchange coefficient is improved, and the uniform heat dissipation of the battery module can be realized. The first connector 133 and the second connector 134 are located on the same side of the second layer plate 132, and are respectively an inlet connector and an outlet connector, and are communicated with the flow channel 137 to form a complete cooling loop. The second layer plate 132 has a flat plate structure, which is beneficial to increasing the contact area between the battery module and the second layer plate 132 and enhancing the heat dissipation effect of the liquid cooling plate 13. The specific flow of the cooling liquid is as follows:
the cooling fluid flows through the first connector 133 to the inlet 1371 of the runner 137 and to the outlet 1372 of the runner 137, and then flows out through the second connector 134.
Of course, in other embodiments, the flow channel 137 may be disposed on the second layer plate 132.
Further, referring to fig. 1, 2 and 4, the frame structure 12 further includes a baffle 125, the baffle 125 is disposed on the bottom plate 11, and is close to the second mounting portion 1212 and connected to an end of each first beam 122, two ends of the baffle 125 are connected to the third mounting portion 1213 to form an isolation space 120 by enclosing with the adjacent second mounting portion 1212 and the adjacent third mounting portion 1213, or two ends of the baffle 125 are connected to the first mounting portion 1211 to form an isolation space 120 by enclosing with a part of the adjacent second mounting portion 1212, the adjacent third mounting portion 1213 and the adjacent first mounting portion 1211, and the first joint 133 and the second joint 134 are disposed in the isolation space 120. The first joint 133 and the second joint 134 are disposed in the insulation space 120. While safety is taken into account, the insulation space 120 achieves dry-wet separation.
In an embodiment of the present invention, referring to fig. 1 and 4, an impact protection structure 124 is disposed on an outer side surface of the frame 121, and the first connector 133 and the second connector 134 are led out from the second layer 132 of the body 130, pass through the frame 121, and are received in the impact protection structure 124. The first joint 133 and the second joint 134 are led out of the frame 121, so that dry-wet separation can be further realized in an auxiliary manner, and the first joint 133 and the second joint 134 are accommodated in the impact-resistant structure 124, that is, the first joint 133 and the second joint 134 are hidden in the impact-resistant structure 124, so that the impact resistance of the box body is improved, and the deformation of the first joint 133 and the second joint 134 due to external impact is avoided.
Specifically, in the present embodiment, the impact-proof structure 124 includes a plurality of impact-proof plates 1241 disposed at intervals on the outer side of the frame 121, the impact-proof plates 1241 are wedge-shaped plates, and the first joint 133 and the second joint 134 penetrate through the frame 121, so that the plurality of impact-proof plates 1241 are located between the first joint 133 and the second joint 134, and can effectively resist impact and prevent the first joint 133 and the second joint 134 from being deformed due to impact. And this anticollision board 124 has seted up the fillet, compares in the closed angle, has reduced stress concentration, prevents that mechanical properties from declining.
In one embodiment of the present invention, referring specifically to fig. 7, 8, 10 and 11, the liquid cooling plate 13 includes a heat exchanging part 135, and the heat exchanging part 135 has a heat exchanging surface 1351 for contacting the battery module.
The battery pack case structure 1 further includes at least two third beams 15 respectively disposed on two sides of the first beam 122, and the third beams 15 are disposed near the frame 121 and parallel to the first beam 122. The third beam 15 penetrates through the liquid cooling plate 13 and is welded with the liquid cooling plate 13, and the second beam 123 abuts against the upper surface of the third beam 15. Therefore, the liquid cooling plate 13 is fixed on the third beam 15 and is not easy to fall off.
Further, the third girder 15 includes a first lower deck plate 151 and a first upper deck plate 152. The first lower plate 151 is disposed close to the bottom plate 11, and the bottom of the liquid cooling plate 13 is attached to the top surface of the first lower plate 151. The first upper plate 152 is disposed on a side of the first lower plate 151 away from the bottom plate 11, a width of the first upper plate 152 is smaller than a width of the first lower plate 151, and the first upper plate 152 penetrates through the liquid cooling plate 13.
The connection portion 1221 of the first beam 122 includes a second lower deck 1224 and a second upper deck 1225. The second lower plate 1224 is disposed adjacent to the bottom plate 11, and the bottom of the liquid cooling plate 13 is attached to the top surface of the second lower plate 1224. The second upper plate 1225 is disposed on a side of the second lower plate 1224 facing away from the bottom plate 11, the width of the second upper plate 1225 is smaller than the width of the second lower plate 1224, and the second upper plate 1225 penetrates through the liquid cooling plate 13. The top surface of the first lower plate 151 and the bottom surface of the second lower plate 1224 are located on the same plane, and the first lower plate 151 and the second lower plate 1224 have a certain thickness, so that the bottom of the liquid cooling plate 13 is attached to the top surface of the first lower plate 151, air can conveniently circulate at the bottom of the liquid cooling plate 13, and heat conduction is also facilitated.
Further, in this embodiment, the liquid cooling plate 1 is used for placing the heat conducting pad 2, and the upper surface of the heat conducting pad 2, the top surface of the first upper plate 152 and the top surface of the second lower plate 1224 are located on the same plane, so that the contact area between the battery module and the liquid cooling plate 13 is increased, and the heat conducting area is increased.
The invention further provides a battery pack, which specifically refers to fig. 1 and fig. 2, and the battery pack comprises the battery pack box body structure 1 and the battery module in any embodiment. The battery module is arranged on the liquid cooling plate 13 in the battery pack box body structure 1 and is accommodated in the accommodating through hole 10.
This battery package is through adopting foretell battery package box structure 1, and is integrated as an organic whole with liquid cooling board 13 and bottom plate 11, has increased intensity, has reduced the installation process of subsequent liquid cooling board 13 and box, and makes liquid cooling board 13 and battery module direct contact, and heat dispersion is good.
Specifically, the battery pack further includes a heat conduction pad 2 disposed on the liquid-cooling plate 13.
The heat conducting pad 2 is a high-performance gap-filling heat conducting material, and is mainly used for a transfer interface between electronic equipment and a heat sink or a product shell. Has good viscosity, flexibility, good compression properties and excellent thermal conductivity. The air between the electronic element and the radiating fin can be completely exhausted when the electronic element is used, so that the contact is full, and the radiating effect is obviously improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A battery pack case structure, comprising:
a base plate;
the frame structure is fixedly connected with the bottom plate and is provided with a plurality of accommodating through holes for accommodating the battery modules; and
and the liquid cooling plate seals one side of the accommodating through hole, which faces the bottom plate, and the part of the liquid cooling plate, which is exposed in the accommodating through hole, is used for bearing the battery module.
2. The battery pack case structure of claim 1, wherein: the frame structure includes:
the frame is arranged around the bottom plate;
the first beams are arranged at intervals along a first direction and penetrate through the liquid cooling plate; and
the second beams are arranged at intervals along a second direction which forms a preset angle with the first direction and are spliced with the first beams, and the first beams and the second beams form a plurality of accommodating through holes.
3. The battery pack case structure of claim 2, wherein: the first beam includes:
the connecting part is fixedly connected with the bottom plate; and
the first inserting part is fixedly connected with the surface of the connecting part, which is far away from the bottom plate, and a plurality of first inserting grooves are formed in the first inserting part along the length direction of the first inserting part;
and the second beam is provided with a plurality of second inserting grooves which are matched and inserted with the first inserting grooves along the width direction of the second beam.
4. The battery pack case structure according to claim 2 or 3, wherein: the frame includes:
the two first mounting parts are respectively connected with two opposite sides of the bottom plate and are parallel to the first beam, and the first mounting parts are vertically connected with two ends of the second beam; and
the two second mounting parts are respectively connected with two opposite ends of the bottom plate and are parallel to the second beam;
a third mounting part which is connected with the corresponding first mounting part and the second mounting part in an obtuse angle is arranged between the adjacent ends of the first mounting part and the second mounting part;
the periphery of the liquid cooling plate is clamped between the bottom plate and the first installation part, the third installation part and one of the second installation parts of the frame.
5. The battery pack case structure of claim 4, wherein: each first mounting part comprises a first mounting strip and a second mounting strip which are parallel to each other and connected with each other in the length direction, and the second mounting strip is arranged on one side, far away from the first beam, of the first mounting strip;
the first mounting strip is provided with a first mounting surface facing the bottom plate, the second mounting strip is provided with a second mounting surface perpendicularly intersected with the first mounting surface, the first mounting surface is abutted against the edge of the liquid cooling plate, and the second mounting surface is fixedly connected with the edge of the bottom plate.
6. The battery pack case structure according to any one of claims 1 to 3, wherein: the bottom plate includes:
a first plate body;
the second plate body is arranged on one side, facing the liquid cooling plate, of the first plate body; and
and the second reinforcing rib is connected between the first plate body and the second plate body.
7. The battery pack case structure of claim 4, wherein: the liquid cooling plate includes:
the device comprises a body, wherein a flow passage is arranged on the body;
the first joint is communicated with the inlet of the flow passage; and
the second joint is communicated with the outlet of the flow passage;
the first joint and the second joint are arranged at one end of the body close to the other second mounting part.
8. The battery pack case structure of claim 7, wherein: the outer side surface of the frame is provided with an impact-proof structure, and the first connector and the second connector are led out from the body, penetrate through the frame and are contained in the impact-proof structure.
9. The battery pack case structure of claim 8, wherein: the anti-impact structure comprises a plurality of anti-impact plates arranged at intervals on the outer side edge of the frame, the anti-impact plates are wedge-shaped plates, the first joint and the second joint penetrate through the frame, so that the anti-impact plates are located between the first joint and the second joint.
10. A battery pack, comprising: the battery pack includes:
the battery pack case structure of any one of claims 1 to 9; and
and the battery module is arranged on the liquid cooling plate in the battery pack box body structure and is accommodated in the accommodating through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523875.5A CN113851751A (en) | 2020-06-10 | 2020-06-10 | Battery pack box structure and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523875.5A CN113851751A (en) | 2020-06-10 | 2020-06-10 | Battery pack box structure and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN113851751A true CN113851751A (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010523875.5A Pending CN113851751A (en) | 2020-06-10 | 2020-06-10 | Battery pack box structure and battery pack |
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| Country | Link |
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| CN (1) | CN113851751A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024044970A1 (en) * | 2022-08-30 | 2024-03-07 | 宁德时代新能源科技股份有限公司 | Box, battery and electric device |
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|---|---|---|---|---|
| TW201619522A (en) * | 2014-11-28 | 2016-06-01 | Metal Ind Res & Dev Ct | Cushioning and collision avoidance device and manufacturing method of energy absorbing plate thereof |
| CN105845856A (en) * | 2015-01-14 | 2016-08-10 | 财团法人金属工业研究发展中心 | Buffer and anti-collision device and production method for energy absorption board therein |
| CN109686894A (en) * | 2019-03-05 | 2019-04-26 | 爱驰汽车有限公司 | Battery pack |
| CN209730005U (en) * | 2019-04-29 | 2019-12-03 | 深圳市迈安热控科技有限公司 | Battery case |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201619522A (en) * | 2014-11-28 | 2016-06-01 | Metal Ind Res & Dev Ct | Cushioning and collision avoidance device and manufacturing method of energy absorbing plate thereof |
| CN105845856A (en) * | 2015-01-14 | 2016-08-10 | 财团法人金属工业研究发展中心 | Buffer and anti-collision device and production method for energy absorption board therein |
| CN109686894A (en) * | 2019-03-05 | 2019-04-26 | 爱驰汽车有限公司 | Battery pack |
| CN209730005U (en) * | 2019-04-29 | 2019-12-03 | 深圳市迈安热控科技有限公司 | Battery case |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024044970A1 (en) * | 2022-08-30 | 2024-03-07 | 宁德时代新能源科技股份有限公司 | Box, battery and electric device |
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Application publication date: 20211228 |
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