CN115133103A - Integrated lithium battery assembly - Google Patents
Integrated lithium battery assembly Download PDFInfo
- Publication number
- CN115133103A CN115133103A CN202210913316.4A CN202210913316A CN115133103A CN 115133103 A CN115133103 A CN 115133103A CN 202210913316 A CN202210913316 A CN 202210913316A CN 115133103 A CN115133103 A CN 115133103A
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- Prior art keywords
- pipe
- lithium battery
- battery pack
- heat absorption
- fin
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 108
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000010521 absorption reaction Methods 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 230000017525 heat dissipation Effects 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 35
- 239000000498 cooling water Substances 0.000 claims description 20
- 239000001307 helium Substances 0.000 claims description 20
- 229910052734 helium Inorganic materials 0.000 claims description 20
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 20
- 239000000178 monomer Substances 0.000 claims description 17
- 239000011295 pitch Substances 0.000 claims description 8
- 241000446313 Lamella Species 0.000 claims 3
- 210000003437 trachea Anatomy 0.000 claims 2
- 230000003139 buffering effect Effects 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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)
Abstract
The invention discloses an integrated lithium battery assembly, which comprises a lithium battery pack, wherein a top plate and a double-layer battery protection plate are fixedly connected to the lithium battery pack, a central heat absorption disc is fixedly installed on the top plate, a water inlet pipe is fixedly connected to the central heat absorption disc and is communicated with a circulating water tank, a heat conduction pipe is fixedly connected to the water inlet pipe and is embedded in the central heat absorption disc, a side heat absorption plate is fixedly installed on the top plate, a direct discharge pipe and a circulating pipe are embedded in the side heat absorption plate, the direct discharge pipe and the circulating pipe are connected to the heat conduction pipe through a three-way pipe, a connecting pipe is fixedly connected to the circulating pipe, and the connecting pipe is connected to a heat dissipation pipe in the battery protection plate; the invention depends on the installation of the integrated heat balance mechanism of the lithium battery pack, and can perform balance regulation and control according to different temperatures of different positions of the lithium battery pack, thereby prolonging the service life of the lithium battery pack.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to an integrated lithium battery assembly.
Background
With the development of lithium battery technology, the power storage capacity of the lithium battery is continuously enhanced, the cruising ability of the new energy automobile carrying the lithium battery is continuously increased, and the acceptance of consumers is gradually improved, so that the market occupation ratio of the new energy automobile is gradually increased.
In the use process of the battery thermal management battery, the difference of the self temperature and the ambient temperature can occur in the charging and discharging process due to the difference of factors such as internal resistance, battery arrangement mode and the like, so that the difference of the output performance can be directly caused. The battery thermal management function is to maintain the operating temperature of the battery pack within the optimal operating temperature range of the battery. The consistency of temperature conditions among the batteries is ensured, so that the consistency of the use parameters of the batteries is ensured. (the battery has different service lives at different temperature states, and the degradation speed is doubled every 10 ℃ rise of the temperature).
But traditional square lithium battery module receives its structural constraint, and the homogeneity that its monomer electricity core was heated is poor, often is that the battery monomer ambient temperature who is located the center is higher than both sides, and the free upper portion of battery charge-discharge position temperature is higher than bottom basis installation position, leads to the temperature difference between the electricity core to influence the uniformity of lithium battery module, and then influence the cycle life of lithium battery package system.
Disclosure of Invention
The invention aims to provide an integrated lithium battery pack to achieve the aim of uniformly regulating the temperature of the upper surface, the lower surface and the central edge of a lithium battery pack so as to prolong the service life of the battery, and solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an integrated lithium battery component comprises a lithium battery pack, wherein a top plate and a double-layer battery protection plate are fixedly connected to the lithium battery pack, a central heat absorption plate is fixedly mounted on the top plate, a water inlet pipe is fixedly connected to the central heat absorption plate, the water inlet pipe is communicated with a circulating water tank, a heat conduction pipe is fixedly connected to the water inlet pipe and embedded in the central heat absorption plate, a side heat absorption plate is fixedly mounted on the top plate, a straight exhaust pipe and a circulating pipe are embedded in the side heat absorption plate and connected to the heat conduction pipe through a three-way pipe, the straight exhaust pipe is connected to the circulating water tank through a first water return pipe, a connecting pipe is fixedly connected to the circulating pipe, the connecting pipe is connected to a radiating pipe in the battery protection plate, the radiating pipe is connected to a collecting pipe, the collecting pipe is connected to the circulating water tank through a second water return pipe, the cooling tube is covered with a contact plate, a cooling fin structure which is adjusted according to the internal and external temperature difference is connected to the cooling tube, and the ambient temperature at the bottom of the lithium battery pack is uniformly adjusted through the cooling fin structure.
Preferably, the lithium battery pack adopts a square frame, lithium battery monomers which are provided with interconnections are arranged in the frame, the top plate is installed at the top of the lithium battery pack through bolts, the battery protection plate is installed at the bottom of the lithium battery pack and consists of an intermediate plate and a bottom plate, a buffer column is connected between the intermediate plate and the bottom plate, and a buffer gap is formed between the intermediate plate and the bottom plate.
Preferably, the central heat absorption plate and the side heat absorption plates are attached to a single lithium battery body of the lithium battery pack, two side heat absorption plates are symmetrically arranged on two sides of the central heat absorption plate, and the water inlet pipe penetrates through the top plate and is connected to the heat conduction pipe.
Preferably, the number of the direct discharging pipe, the number of the first water returning pipe, the number of the circulating pipe and the number of the connecting pipes are two, the two ends of the heat conducting pipe are symmetrically arranged, the circulating water tank is provided with a water pump, and cooling water arranged in the circulating water tank is supplied with pressure.
Preferably, inlet tube, heat pipe, collinear duct, first wet return constitute first heat absorption route, and inlet tube, heat pipe, circulating pipe, connecting pipe, convection tube, cooling tube, collecting pipe, second wet return constitute second heat absorption route, the cooling water in the circulating water tank circulates in two heat absorption routes, carries out the even formula heat dissipation of lithium cell group, the cooling tube is arranged and is provided with eight at least, and the intercommunication is between convection tube and collecting pipe.
Preferably, the radiating fin structure is including the first fin of slidable mounting on the cooling tube, and first fin arranges on the cooling tube and is provided with eight at least, and is provided with the screw on the first fin, first fin passes through the screw and connects on the dwang, and is provided with first screw thread and the second screw thread of mirror image in relation to the midpoint on the dwang, first screw thread and second screw thread constitute by the thread pair that a plurality of independent pitches progressively increase, first fin distributed connection is on the thread pair of different pitches.
Preferably, the tip fixedly connected with belt pulley of dwang, and the belt pulley is connected through the belt, and is close to fixedly connected with reduction gear group on the dwang of the cooling tube installation of most marginal, and reduction gear group drives through the drive shaft.
Preferably, the radiating fin structure is including the second fin of slidable mounting on the cooling tube, and fixedly connected with spring on the second fin, spring fixed connection is on the base, and fixed mounting has the piece of drawing on the second fin, one side of cooling tube is provided with the guided way, and fixed mounting has the helium pipe on the guided way, slidable mounting has the piston rod in the helium pipe, and fixedly connected with stay cord on the piston rod.
Preferably, the second fin is arranged and is set up on the cooling tube, and the base is located the side of second fin, base fixed mounting is on the bottom plate, the central point that the guided way is close to the cooling tube puts and sets up, and the helium pipe mirror image is provided with two above that, be provided with the uide bushing on the guided way, and the stay cord passes the uide bushing and connect on arranging the second fin that sets up, adjusts the position of second fin along with the temperature harmomegathus through the helium that is located in the helium pipe at middle part.
Compared with the prior art, the invention has the beneficial effects that:
1. the integrated heat balance mechanism is mounted by depending on the lithium battery pack, and balanced regulation and control can be performed according to different temperatures of different positions of the lithium battery pack, so that the temperatures of all the positions in the lithium battery pack are the same, the consistency of single lithium batteries is improved, the service life of the lithium battery pack is prolonged, and potential safety hazards in the use process of a new energy automobile are effectively avoided;
2. according to the invention, the radiating fin structure is arranged on the radiating pipe, so that the heat emission in the radiating pipe can be facilitated, the radiating fin structure can be adjusted according to the temperature difference between the center and the edge position of the lithium battery pack, the radiating capacity of different positions is changed, the temperature of the center and the edge position of the lower surface of the lithium battery pack is kept consistent, and the consistency of the working environment of the single battery is improved.
Drawings
FIG. 1 is a first schematic view of the overall structure of the present invention;
FIG. 2 is a second schematic view of the overall structure of the present invention;
FIG. 3 is a schematic diagram of a lithium battery according to the present invention;
FIG. 4 is a schematic view of a thermally conductive structure of the present invention;
FIG. 5 is a schematic view of a top plate of the present invention;
FIG. 6 is a schematic view of the heat absorption pipeline structure of the present invention;
FIG. 7 is a schematic view of the battery protection plate structure of the present invention;
FIG. 8 is a schematic view of a backplane structure according to the present invention;
FIG. 9 is a schematic view of a first heat dissipation structure according to the present invention;
FIG. 10 is a partial schematic view of a first adjustment mechanism of the present invention;
FIG. 11 is a diagram illustrating a second heat dissipation structure according to the present invention;
FIG. 12 is a partial schematic view of a second adjustment mechanism of the present invention.
In the figure: the solar heat collector comprises a lithium battery pack 1, a top plate 2, a central heat absorption plate 3, a water inlet pipe 4, a circulating water tank 5, a heat conduction pipe 6, a side heat absorption plate 7, a straight exhaust pipe 8, a first water return pipe 9, a circulating pipe 10, a connecting pipe 11, a middle plate 12, a bottom plate 13, a buffer column 14, a convection pipe 15, a heat dissipation pipe 16, a manifold 17, a second water return pipe 18, a contact plate 19, a first fin 20, a rotating rod 21, a first thread 22, a second thread 23, a belt pulley 24, a belt 25, a speed reduction gear set 26, a driving shaft 27, a second fin 28, a spring 29, a base 30, a pulling block 31, a guide rail 32, a helium pipe 33, a piston rod 34, a pulling rope 35 and a temperature sensor set 36.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, wherein various embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict, and it should be understood that the described embodiments are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 12, the present invention provides a technical solution: an integrated lithium battery pack comprises a lithium battery pack 1, a top plate 2 and a double-layer battery protection plate are fixedly connected to the lithium battery pack 1, a central heat absorption plate 3 is fixedly mounted on the top plate 2, a water inlet pipe 4 is fixedly connected to the central heat absorption plate 3, the water inlet pipe 4 is communicated with a circulating water tank 5, a heat conduction pipe 6 is fixedly connected to the water inlet pipe 4, the heat conduction pipe 6 is embedded into the central heat absorption plate 3, a side heat absorption plate 7 is fixedly mounted on the top plate 2, a straight drainage pipe 8 and a circulating pipe 10 are embedded into the side heat absorption plate 7, the straight drainage pipe 8 and the circulating pipe 10 are connected to the heat conduction pipe 6 through a three-way pipe, the straight drainage pipe 8 is connected to the circulating water tank 5 through a first return pipe 9, a connecting pipe 11 is fixedly connected to the circulating pipe 10, the connecting pipe 11 is connected to a radiating pipe 16 in the battery protection plate, and the radiating pipe 16 is connected to the straight drainage pipe 17, the collecting pipe 17 is connected on circulating water tank 5 through second wet return 18, and the cooling tube 16 is covered and is provided with contact plate 19, and is connected with the radiating fin structure of adjusting according to inside and outside temperature difference on the cooling tube 16, evenly adjusts the ambient temperature of lithium cell group 1 bottom through the radiating fin structure.
The integrated heat balance mechanism is mounted on the lithium battery pack 1, and balanced regulation and control can be performed according to different temperatures of different positions of the lithium battery pack 1, so that the temperatures of all the positions in the lithium battery pack 1 are the same, the consistency of lithium battery monomers is improved, the service life of the lithium battery pack 1 is prolonged, and potential safety hazards in the use process of a new energy automobile are effectively avoided;
the lithium battery pack 1 adopts a square frame, lithium battery monomers which are mutually connected are arranged in the frame, the top plate 2 is installed at the top of the lithium battery pack 1 through bolts, the battery guard plate is installed at the bottom of the lithium battery pack 1 and consists of a middle plate 12 and a bottom plate 13, a buffer column 14 is connected between the middle plate 12 and the bottom plate 13, and a buffer gap is formed between the middle plate 12 and the bottom plate 13;
the thermal balance mechanism is integrally installed on a protection structure of a lithium battery pack 1, the lithium battery pack 1 is protected by adopting a top plate 2 and a battery protection plate in a packaging mode, the lithium battery pack 1 in the existing new energy vehicle is generally installed on a chassis of an automobile, and the battery protection plate leaks naked, so that the battery protection plate adopts a double-layer buffer type structure and is composed of a middle plate 12 and a bottom plate 13, a buffer gap is formed between the middle plate 12 and the bottom plate 13 by a buffer column 14, the collision of the lithium battery pack 1 on a road surface can be effectively prevented, and the buffer column 14 can also block a thermal bridge;
the central heat absorption plate 3 and the side heat absorption plates 7 are attached to the single lithium batteries of the lithium battery pack 1, two side heat absorption plates 7 are symmetrically arranged on two sides of the central heat absorption plate 3, and the water inlet pipe 4 penetrates through the top plate 2 and is connected to the heat conduction pipe 6;
the heat balance mechanism of the invention firstly aims at the charge and discharge position of the lithium battery pack 1 on the upper surface, because of the structural limitation of the lithium battery pack 1, the battery monomer at the central position of the battery pack is difficult to radiate heat, so the temperature is higher than the monomer temperature at the outer edge, the cooling water in the circulating water tank 5 enters the heat conduction pipe 6 through the water inlet pipe 4, the heat conduction pipe 6 passes through the central heat absorption disc 3 and extends into the side heat absorption plate 7, and then the cooling water is led into the straight exhaust pipe 8 and the circulating pipe 10, in the process, the temperature of the cooling water is continuously increased, so the heat balance mechanism has different heat absorption capacities, the temperature reduction range of the battery monomer at the central position is larger, and the temperature reduction range of the battery monomer at the edge is smaller, and therefore the balanced heat radiation effect is achieved;
the number of the direct drainage pipe 8, the first water return pipe 9, the circulating pipe 10 and the connecting pipe 11 is two, the two pipes are symmetrically arranged at two ends of the heat conduction pipe 6, and the circulating water tank 5 is provided with a water pump for supplying pressure to cooling water arranged in the circulating water tank 5;
the water inlet pipe 4, the heat conduction pipe 6, the straight exhaust pipe 8 and the first water return pipe 9 form a first heat absorption passage, the water inlet pipe 4, the heat conduction pipe 6, the circulating pipe 10, the connecting pipe 11, the convection pipe 15, the radiating pipe 16, the collecting pipe 17 and the second water return pipe 18 form a second heat absorption passage, cooling water in the circulating water tank 5 circulates in the two heat absorption passages to uniformly radiate the lithium battery pack 1, and at least eight radiating pipes 16 are arranged and communicated between the convection pipe 15 and the collecting pipe 17;
cooling water for cooling the upper surface of the lithium battery pack 1 has two flowing modes, one part of the cooling water enters a first heat absorption passage formed by a water inlet pipe 4, a heat conduction pipe 6, a straight line pipe 8 and a first return pipe 9 and directly returns to a circulating water tank 5, and the other part of the cooling water enters a second heat absorption passage formed by the water inlet pipe 4, the heat conduction pipe 6, a circulating pipe 10, a connecting pipe 11, a convection pipe 15, a heat dissipation pipe 16, a confluence pipe 17 and a second return pipe 18, and simultaneously absorbs heat of the upper surface and the lower surface of the lithium battery pack 1 because the lower surface of the lithium battery pack 1 is usually a basic component part, the lower surface of the lithium battery pack has small heat productivity, the cooling water absorbing heat of the upper surface absorbs heat of the lower surface, the cooling amplitude is smaller, and the temperature balance of the upper surface and the lower surface of the lithium battery pack 1 is facilitated;
the radiating pipe 16 is also provided with a radiating fin structure which can help the heat in the radiating pipe 16 to be discharged, and the radiating fin structure can be adjusted according to the temperature difference between the center and the edge position of the lithium battery pack 1, so that the radiating capacity of different positions is changed, and the temperature of the center and the edge position is kept consistent;
two embodiments of the fin structure are as follows:
example 1
The radiating fin structure comprises first fins 20 which are slidably mounted on a radiating pipe 16, at least eight first fins 20 are arranged on the radiating pipe 16 in an arrayed manner, screw holes are formed in the first fins 20, the first fins 20 are connected to a rotating rod 21 through the screw holes, mirrored first threads 22 and mirrored second threads 23 are arranged on the rotating rod 21 relative to the midpoint, each of the first threads 22 and the second threads 23 is formed by a plurality of independent thread pairs with gradually increasing thread pitches, and the first fins 20 are connected to the thread pairs with different thread pitches in a distributed manner;
a belt pulley 24 is fixedly connected to the end of the rotation rod 21, the belt pulley 24 is connected through a belt 25, a reduction gear set 26 is fixedly connected to the rotation rod 21 installed near the edge-most radiating pipe 16, and the reduction gear set 26 is driven through a driving shaft 27;
the temperature is measured by arranging the temperature sensor groups 36 on the contact plate 19, the temperature sensor groups 36 are respectively arranged close to the center and the edge of the battery pack, when the temperature difference is sensed to occur in the battery pack, the driving shaft 27 drives the reduction gear set 26 to rotate, so as to drive the rotating rod 21, when the rotating rod 21 rotates forwards, the first threads 22 and the second threads 23 on the rotating rod drive the first fins 20 on the rotating rod, because the first threads 22 and the second threads 23 are both composed of a plurality of thread pairs with different thread pitches, the thread pitch close to the center is smaller, so that the first fins 20 arranged in an array move towards the center position in a centralized way, the heat dissipation capability of the center part of the lithium battery pack 1 can be enhanced, otherwise, when the rotating rod 21 rotates backwards, the heat dissipation capability of the edge part of the lithium battery pack 1 can be enhanced, the adjustment is carried out according to the temperature difference in the lithium battery pack 1, the consistency of the working environment of the single battery is improved;
example 2
The radiating fin structure comprises a second fin 28 which is slidably mounted on the radiating pipe 16, a spring 29 is fixedly connected to the second fin 28, the spring 29 is fixedly connected to a base 30, a pull block 31 is fixedly mounted on the second fin 28, a guide rail 32 is arranged on one side of the radiating pipe 16, a helium pipe 33 is fixedly mounted on the guide rail 32, a piston rod 34 is slidably mounted in the helium pipe 33, and a pull rope 35 is fixedly connected to the piston rod 34;
the second fins 28 are arranged on the radiating pipe 16, the base 30 is positioned on the side surfaces of the second fins 28, the base 30 is fixedly installed on the bottom plate 13, the guide rail 32 is arranged close to the central position of the radiating pipe 16, the two helium pipes 33 are arranged on the guide rail 32 in a mirror image mode, the guide sleeve is arranged on the guide rail 32, the pull rope 35 penetrates through the guide sleeve to be connected to the arranged second fins 28, and the position of the second fins 28 is adjusted through helium gas in the helium pipes 33 positioned in the middle part along with temperature expansion and contraction;
when the temperature of 1 central point of lithium cell group puts is too high, can make the helium in the helium pipe 33 receive thermal expansion, and then promote piston rod 34 in the helium pipe 33, stimulate stay cord 35 through piston rod 34, stimulate second fin 28, make second fin 28 concentrate towards the central point in the cooling tube 16, improve the heat-sinking capability of 1 central point of lithium cell group puts, on the contrary, when helium contracts, stay cord 35 is then loosened to piston rod 34, make second fin 28 remove under spring 29's effect, improve the heat-sinking capability of 1 marginal position of lithium cell group, adjust according to the temperature difference in 1 of lithium cell group, improve the uniformity of battery monomer operational environment.
When the invention is used: firstly, the invention relies on the installation of an integrated thermal balance mechanism on the lithium battery pack 1, and can carry out balance regulation and control according to different temperatures of different positions of the lithium battery pack 1, so that the temperatures of all the positions in the lithium battery pack 1 are the same, the consistency of lithium battery monomers is improved, the service life of the lithium battery pack 1 is prolonged, and potential safety hazards in the use process of new energy automobiles are effectively avoided, the thermal balance mechanism is integrally installed on a protection structure of the lithium battery pack 1, the lithium battery pack 1 is protected by adopting a top plate 2 and a battery protection plate in an encapsulation mode, the lithium battery pack 1 in the current new energy automobile is generally installed on an automobile chassis, the battery protection plate is exposed, therefore, the battery protection plate adopts a double-layer buffer structure and is composed of a middle plate 12 and a bottom plate 13, a buffer gap is formed between the middle plate 12 and the bottom plate 13 by a buffer column 14, the lithium battery pack 1 can be effectively prevented from being collided by the road surface, the buffer column 14 can also block a heat bridge, the heat balance mechanism firstly aims at the charge and discharge position of the upper surface of the lithium battery pack 1, because of the structural limitation of the lithium battery pack 1, the battery monomer positioned at the central position of the battery pack is difficult to dissipate heat, the temperature is higher than the temperature of the monomer at the outer edge, therefore, the cooling water in the circulating water tank 5 enters the heat conduction pipe 6 through the water inlet pipe 4, the heat conduction pipe 6 passes through the central heat absorption disc 3 and extends into the side heat absorption plate 7, and then the cooling water is guided into the straight exhaust pipe 8 and the circulating pipe 10, in the process, the temperature of the cooling water is continuously increased, so that different heat absorption capacities are achieved, the cooling amplitude of the battery monomer at the central position is larger, the cooling amplitude of the battery monomer at the edge is smaller, and therefore, a balanced heat dissipation effect is achieved, the cooling water for cooling the upper surface of the lithium battery pack 1 has two flowing modes, one part of the cooling water enters a first heat absorption path formed by a water inlet pipe 4, a heat conduction pipe 6, a straight-line pipe 8 and a first return pipe 9 and directly returns to a circulating water tank 5, and the other part of the cooling water enters a second heat absorption path formed by the water inlet pipe 4, the heat conduction pipe 6, a circulating pipe 10, a connecting pipe 11, a convection pipe 15, a heat dissipation pipe 16, a confluence pipe 17 and a second return pipe 18, and simultaneously absorbs the heat of the upper surface and the lower surface of the lithium battery pack 1, because the lower surface of the lithium battery pack 1 is usually a basic component part, the heat productivity is small, the cooling water absorbing the heat of the upper surface is absorbed and then absorbs the heat of the lower surface, the cooling amplitude is smaller, the temperature balance of the upper surface and the lower surface of the lithium battery pack 1 is facilitated, and a heat dissipation fin structure is further arranged on the heat dissipation pipe 16, so that the heat emission in the heat dissipation pipe 16 can be facilitated, and the radiating fin structure can be adjusted according to the temperature difference of the center and the edge position of the lithium battery pack 1, so that the radiating capacity of different positions is changed, the temperature of the center and the temperature of the edge position are kept consistent, and the consistency of the working environment of the single batteries is improved.
The above embodiments are merely preferred embodiments of the present invention, and the scope of the present invention should not be limited thereto, and those skilled in the art will be able to make various modifications without inventive changes from the above concepts and the scope of the present invention.
Claims (9)
1. An integrated lithium battery pack comprising a lithium battery pack (1), characterized in that: fixedly connected with roof (2) and double-deck formula battery backplate on lithium cell group (1), and fixed mounting has central heat absorption dish (3) on roof (2), fixedly connected with inlet tube (4) on central heat absorption dish (3), and inlet tube (4) intercommunication is on circulation tank (5), fixedly connected with heat pipe (6) on inlet tube (4), and heat pipe (6) embedding is on central heat absorption dish (3), fixedly mounted has side heat absorption board (7) on roof (2), and embedding in the side heat absorption board (7) installs in-line vent (8) and circulating pipe (10), and in-line vent (8) and circulating pipe (10) connect on heat pipe (6) through the three-way pipe, in-line vent (8) connect on circulation tank (5) through first wet return (9), and fixedly connected with connecting pipe (11) on circulating pipe (10), connecting pipe (11) are connected on cooling tube (16) in the battery backplate, and cooling tube (16) are connected on collecting pipe (17), collecting pipe (17) are connected on circulating water tank (5) through second wet return (18), cooling tube (16) are covered and are provided with contact plate (19), and are connected with the radiating fin structure of adjusting according to inside and outside temperature difference on cooling tube (16), evenly adjust the ambient temperature of lithium cell group (1) bottom through the radiating fin structure.
2. An integrated lithium battery pack as claimed in claim 1, wherein: lithium cell group (1) adopts square frame, and arranges the lithium cell monomer that is provided with interconnect in the frame, roof (2) are through the bolt mounting at the top of lithium cell group (1), and the battery backplate is installed in the bottom of lithium cell group (1), the battery backplate comprises intermediate lamella (12) and bottom plate (13), and is connected with between intermediate lamella (12) and bottom plate (13) cushion column (14), constitutes the buffering clearance between intermediate lamella (12) and bottom plate (13).
3. An integrated lithium battery pack as claimed in claim 1, wherein: the central heat absorption plate (3) and the side heat absorption plates (7) are attached to a lithium battery monomer arranged on the lithium battery pack (1), two side heat absorption plates (7) are symmetrically arranged on two sides of the central heat absorption plate (3), and the water inlet pipe (4) penetrates through the top plate (2) and is connected onto the heat conduction pipe (6).
4. An integrated lithium battery pack as claimed in claim 3, wherein: direct vent (8), first return pipe (9), circulating pipe (10), connecting pipe (11) all are provided with two, and the symmetry sets up the both ends at heat pipe (6), be provided with the water pump on circulating water tank (5), supply the pressure to the cooling water that sets up in circulating water tank (5).
5. An integrated lithium battery pack as claimed in claim 4, wherein: inlet tube (4), heat pipe (6), collinear duct (8), first wet return (9) constitute first heat absorption route, and inlet tube (4), heat pipe (6), circulating pipe (10), connecting pipe (11), convection tube (15), cooling tube (16), collecting pipe (17), second wet return (18) constitute second heat absorption route, the cooling water in circulating water tank (5) circulates in two heat absorption routes, carries out the even formula heat dissipation of lithium cell group (1), cooling tube (16) are arranged and are provided with eight at least, and the intercommunication is between convection tube (15) and collecting pipe (17).
6. An integrated lithium battery pack as claimed in claim 5, wherein: radiating fin structure is including first fin (20) of slidable mounting on cooling tube (16), and first fin (20) arrange on cooling tube (16) and be provided with eight at least, and be provided with the screw on first fin (20), first fin (20) are connected on dwang (21) through the screw, and are provided with first screw thread (22) and second screw thread (23) of mirror image in the dwang (21) about the mid point, first screw thread (22) and second screw thread (23) constitute by the screw thread pair that a plurality of independent pitches progressively increase, first fin (20) distributed connection is on the screw thread pair of different pitches.
7. An integrated lithium battery pack as claimed in claim 6, wherein: tip fixedly connected with belt pulley (24) of dwang (21), and belt pulley (24) are connected through belt (25), and are close to fixedly connected with reduction gear group (26) on dwang (21) of cooling tube (16) installation of most marginal, and reduction gear group (26) drive through drive shaft (27).
8. An integrated lithium battery pack as claimed in claim 5, wherein: radiating fin structure is including second fin (28) of slidable mounting on cooling tube (16), and fixedly connected with spring (29) on second fin (28), spring (29) fixed connection is on base (30), and fixed mounting has pull block (31) on second fin (28), one side of cooling tube (16) is provided with guided way (32), and fixed mounting has helium trachea (33) on guided way (32), slidable mounting has piston rod (34) in helium trachea (33), and fixedly connected with stay cord (35) on piston rod (34).
9. An integrated lithium battery pack as claimed in claim 8, wherein: second fin (28) are arranged and are set up on cooling tube (16 lambda), and base (30) are located the side of second fin (28), base (30) fixed mounting is on bottom plate (13), central point that guiding rail (32) are close to cooling tube (16) puts and sets up, and helium pipe (33) mirror image is provided with two on it, be provided with the uide bushing on guiding rail (32), and stay cord (35) pass the uide bushing and connect on arranging second fin (28) that set up, adjust the position of second fin (28) along with the temperature harmomegathus through the helium that is arranged in helium pipe (33) at middle part.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210913316.4A CN115133103B (en) | 2022-07-27 | 2022-07-27 | Integrated lithium battery assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210913316.4A CN115133103B (en) | 2022-07-27 | 2022-07-27 | Integrated lithium battery assembly |
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| CN115133103A true CN115133103A (en) | 2022-09-30 |
| CN115133103B CN115133103B (en) | 2023-10-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115993541A (en) * | 2023-03-23 | 2023-04-21 | 深圳安培时代数字能源科技有限公司 | Nondestructive lithium analysis detection method and related device for lithium iron phosphate battery |
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| CN215377595U (en) * | 2021-08-06 | 2021-12-31 | 广东轻工职业技术学院 | New energy automobile battery fixing shell with heat dissipation mechanism |
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| CN103943913A (en) * | 2014-04-17 | 2014-07-23 | 华南理工大学 | Pure electric vehicle power battery cooling and heating device with liquid cooling plate |
| WO2020179196A1 (en) * | 2019-03-01 | 2020-09-10 | 株式会社日立製作所 | Battery pack |
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|---|---|
| CN115133103B (en) | 2023-10-20 |
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