CN111900512A - Battery assembly - Google Patents
Battery assembly Download PDFInfo
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- CN111900512A CN111900512A CN201910367857.XA CN201910367857A CN111900512A CN 111900512 A CN111900512 A CN 111900512A CN 201910367857 A CN201910367857 A CN 201910367857A CN 111900512 A CN111900512 A CN 111900512A
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- Prior art keywords
- plate
- plate surface
- interface
- battery
- rib
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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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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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
- H01M10/65—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
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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
- H01M10/65—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
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The technical scheme of the invention provides a battery pack which comprises a temperature equalizing device, wherein the temperature equalizing device comprises a first plate and a second plate, a first flow channel is formed in the temperature equalizing device, and the first plate and the second plate are fixed and the joint of the first plate and the second plate is sealed. The first plate comprises a first plate surface, the second plate comprises a second plate surface, and the first plate surface is in direct or indirect contact with the battery. The battery pack further comprises a heat exchange device, the heat exchange device comprises a third plate and a fourth plate, and a second flow channel is formed in the heat exchange device. The third plate further comprises a third plate surface corresponding to the second plate surface, the third plate and the fourth plate are fixed, the joint of the third plate and the fourth plate is sealed, and the third plate surface is in direct or indirect contact with the second plate surface. The temperature equalizing device is arranged between the battery and the heat exchange device, so that the heat exchange device exchanges heat with the battery through the temperature equalizing device, the heat transfer uniformity between the heat exchange device and the battery can be improved, and the temperature uniformity of the battery is improved.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery assembly.
Background
Batteries of electric vehicles or hybrid vehicles generate heat during charging and discharging, and the batteries need to be cooled in order to work normally. The battery is typically cooled using a battery cooling device, which is typically in thermal contact with the battery assembly through a thermally conductive pad. With the intensive research on the performance of the battery, the current battery has a greater demand for temperature uniformity, and thus the requirement for uniformity of heat transfer between the cooling device and the battery assembly is also higher and higher.
Disclosure of Invention
The technical scheme of the invention provides a battery assembly, which comprises a battery, wherein the battery assembly comprises a temperature equalizing device, the temperature equalizing device comprises a first plate and a second plate, the first plate and the second plate are fixed, the joint of the first plate and the second plate is sealed, a first flow channel is formed in the temperature equalizing device, the first plate is provided with a first plate surface, the second plate is provided with a second plate surface, and the first plate surface is in direct or indirect contact with the battery;
the battery component further comprises a heat exchange device, the temperature equalizing device is arranged between the heat exchange device and the battery, the heat exchange device comprises a third plate and a fourth plate, the third plate and the fourth plate are fixed, the connection part of the third plate and the fourth plate is sealed, and a second flow channel is formed in the heat exchange device; the heat exchange device further comprises a first interface and a second interface, the first interface is communicated with one end of the second flow channel, the second interface is communicated with the other end of the second flow channel, the third plate is provided with a third plate corresponding to the second plate, the third plate is in direct or indirect contact with the second plate, and the temperature equalizing device is detachably fixed with the heat exchange device, so that the heat exchange device can exchange heat with the battery through the temperature equalizing device.
In the battery pack provided by the scheme, the temperature equalizing device is arranged between the battery and the heat exchange device, so that the heat exchange device exchanges heat with the battery through the temperature equalizing device, the heat transfer uniformity between the heat exchange device and the battery can be improved, and the temperature uniformity of the battery is improved.
Drawings
FIG. 1 shows a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic partial cross-sectional view of the battery assembly of FIG. 1 taken along line A-A;
FIG. 3 shows an exploded view of the battery assembly of FIG. 1;
FIG. 4 shows a schematic cross-sectional view of the battery assembly of FIG. 1 along line C-C;
FIG. 5 shows a schematic perspective view of another embodiment of the present invention;
FIG. 6 is a schematic partial cross-sectional view of the battery assembly of FIG. 5 taken along line B-B;
FIG. 7 is an enlarged schematic view of a portion of the battery assembly of FIG. 6;
FIG. 8 shows a schematic cross-sectional view of yet another embodiment of the present invention;
FIG. 9 shows a schematic perspective view of a further embodiment of the present invention;
FIG. 10 shows a schematic cross-sectional view of yet another embodiment of the present invention;
FIG. 11 shows a system diagram of one embodiment of the present invention;
fig. 12 shows a system diagram of another embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 3, in one embodiment of a battery assembly including a battery 5, the battery assembly includes a temperature uniforming device 1, and the temperature uniforming device 1 includes a first sheet 13 and a second sheet 12. The first plate and the second plate are fixed and the joint is sealed, a first flow channel 16 is formed in the temperature equalizing device 1, the first plate 13 comprises a first plate surface 11, the second plate 12 comprises a second plate surface 19, and the first plate surface is in direct or indirect contact with the battery 5. Note that the "indirect contact" means that other members, such as a thermal pad, an adhesive material, and the like, may be provided between the battery 5 and the first plate surface 11.
The battery component further comprises a heat exchange device 3, the temperature equalizing device 1 is arranged between the heat exchange device 3 and the battery 5, the heat exchange device 3 comprises a third plate 31 and a fourth plate 32, and a second flow channel 36 is formed in the heat exchange device 3. The heat exchange device 3 further comprises a first interface 34 and a second interface 35, the first interface 34 is communicated with one end of the second flow channel 36, the second interface is communicated with the other end of the second flow channel, the third plate 31 further comprises a third plate surface 37 corresponding to the second plate surface 19, and the joint of the third plate and the fourth plate is fixed and sealed. Fluid can enter the second flow channel 36 from the first port 34 and then exit the second port 35. The battery assembly also includes a second fin 38, the second fin 38 being disposed in the second flow channel.
As shown in fig. 2, the second plate surface 19 is in direct or indirect contact with the third plate surface 37 in the mounted state of the battery assembly. The heat exchange device 3 indirectly exchanges heat with the battery 5 through the temperature equalizing device 1, and the temperature equalizing device 1 improves the heat transfer uniformity between the heat exchange device 3 and the battery 5. This is because a first flow channel is provided in a part of the region between the heat exchanger 3 and the battery 5, and the first flow channel contains liquid, and the specific heat of the liquid in the first flow channel is large. The temperature change of the heat exchange device 3 does not immediately affect the first plate surface 11 of the temperature equalizing device 1, so that the temperature change of the third plate surface 37 of the heat exchange device lags behind the first plate surface 11. It should be noted that "indirect contact" means that other components, such as a thermal pad, may be disposed between the second plate surface 19 and the third plate surface 37.
The second flow channel 36 is disposed corresponding to the first flow channel 16, the first flow channel 16 may extend in a direction parallel or substantially parallel to the first plate surface 11, and the second flow channel 36 may also extend in a direction parallel or substantially parallel to the first plate surface 11. The liquid in the first flow passage may exchange heat with the fluid in the second flow passage.
The temperature equalizing device 1 further comprises a third interface 14 and a fourth interface 15, wherein the third interface is communicated with one end of the first flow channel 16, and the fourth interface is communicated with the other end of the first flow channel 16. Fluid can enter the first flow passage 16 through the third port 14 and then flow out through the fourth port 15. The temperature equalizing device further comprises a first fin 18, the first fin 18 is arranged in the first flow channel 16, and the first fin can be a flow disturbing fin. The third interface is communicated with an inlet of an external water pump, the fourth interface is communicated with an outlet of the external water pump, and fluid flowing into the temperature equalizing device 1 can circularly flow between the temperature equalizing device 1 and the external water pump. So that the heat exchange device can exchange heat with the temperature equalizing device, and the temperature equalizing device can exchange heat with the battery. In the flowing process, the cold and hot parts of the fluid in the temperature equalizing device 1 can be mixed, so that the temperature uniformity of the first plate surface 11 of the temperature equalizing device 1 is relatively high. The first fins 18 can play a role in disturbing the fluid, so that the cold and hot fluids can be mixed more sufficiently, and the temperature uniformity of the temperature equalizing device 1 can be further improved.
The battery 5 may include a plurality of battery cells 51,52,53, and the first plate 11 may be in direct or indirect contact with each of the battery cells 51,52,53, which are disposed corresponding to the first flow channel 16, so that temperature uniformity among the battery cells is improved.
The fluid in the first flow path 16 may be a cooling fluid, such as a water-glycol mixture. The fluid in the second flow passage 36 may be a refrigerant, such as R134a, R744, etc. The temperature of the refrigerant gradually rises as the refrigerant flows through the second flow passage, and the temperature of the refrigerant rises greatly along the second flow passage because the specific heat of the refrigerant is relatively small, while the second flow passage is located within the heat exchange device, resulting in relatively poor temperature uniformity across the third plate surface 37. After the temperature equalizing device is added, the specific heat of the cooling liquid is relatively large, the cooling liquid is in a flowing state, and the temperature uniformity of the first plate surface 11 of the temperature equalizing device is relatively high. Namely, the temperature equalizing device 1 improves the uniformity of heat transfer between the heat exchange device 3 and the battery 5.
As shown in fig. 1, the temperature equalizing device 1 and the heat exchanging device 3 are detachably fixed, and when the battery assembly is in a detached state, the second plate surface 19 is separated from the third plate surface 37. Both the second plate surface 19 and the third plate surface 37 may be planar to increase the contact area therebetween. Alternatively, the second plate surface 19 and the third plate surface 37 may have a concave-convex shape, but the second plate surface 19 and the third plate surface 37 are required to have substantially complementary shapes so as to increase the contact area therebetween. The second plate may be made of a high thermal conductivity material, such as metal, silicon gel, etc., which is beneficial for the heat conduction at the second plate surface 19. First slab and second slab can be aluminium or aluminum alloy material, and aluminium or aluminum alloy's heat conductivility is stronger, is favorable to strengthening the heat transfer, and can make battery pack have lighter weight.
In this embodiment, the heat exchanging device 3 may be connected to the vehicle body, and the temperature equalizing device 1 may be fixed to the battery 5 to form a part of a detachable battery pack (as shown by a dotted line in fig. 1), which is detachable from the vehicle body. Furthermore, the battery 5 also generates heat when the removable battery pack is placed in a charging station for charging. The battery 5 can be cooled through the second plate surface 19 at the time of charging.
As shown in fig. 3 and 4, the second plate 12 includes a sixth plate surface 122 disposed on the back surface of the second plate surface 19, the second plate 12 further includes a first flange 123 protruding from the sixth plate surface 122 and a first rib 124, and the first plate 13 is fixed to and sealed at the connection between the first flange 123 and the first rib 124. The first flange 123 surrounds at least the first rib 124, one end of the first rib 124 is connected to one side of the first flange 123, and the other end of the first rib 124 is not connected to the other side of the first flange 123, forming a gap through which fluid can flow. The second plate 12 and the first plate 13 define a first flow channel 16 therebetween. The first rib 124 may divide the first flow channel 16 into a U-shape. The third interface 14 and the fourth interface 15 are both disposed on one side of the first rib 124 connected to the first flange 123, and are respectively disposed on two sides of the first rib 124. The temperature difference between the inflow end and the outflow end of the fluid in the first flow channel is the largest, so that the heat exchange between the inflow end and the outflow end of the fluid is realized, and the temperature uniformity of the first plate surface 11 can be further improved. Namely, the temperature uniformity of the temperature equalizing device 1 is high. The first plate 13 may be a flat plate, and the heights of the first rib and the first flange protruding from the sixth plate surface 122 may be the same or substantially the same.
In another embodiment of the temperature equalizing device 1, the first plate 13 includes a fifth plate 131 disposed on the back of the first plate 11, the first plate 13 further includes a first flange 123 protruding from the fifth plate 131 and a first rib 124, and the joint of the second plate 12 and the first flange 123 and the first rib 124 is sealed.
In other embodiments of the temperature uniforming device, the temperature uniforming device may be provided with a plurality of first ribs, and the plurality of first ribs may divide the second flow channel into a serpentine shape. The first flow channel may include a plurality of parallel flow channels, one end of each parallel flow channel being communicated with the third interface, and the other end of each parallel flow channel being communicated with the fourth interface. The fluid is distributed more uniformly in the temperature equalizing device, and the temperature distribution of the temperature equalizing device is further uniform.
As shown in fig. 3 and 4, the third plate 31 includes a seventh plate surface 312 disposed on the back of the third plate surface 37, the third plate 31 further includes a second flange 313 protruding from the seventh plate surface 312 and a second rib 314, and the connection between the fourth plate 32 and the second flange 313 and the second rib 314 is sealed. The second flange 313 surrounds at least the second rib 314, one end of the second rib 314 is connected with one side of the second flange 313, the other end of the second rib 314 is not connected with the other side of the second flange 313, a gap for fluid to flow through is formed, and a second flow channel 36 is defined between the third plate 31 and the fourth plate 32. The second rib 314 may divide the second flow channel 36 into a U-shape. The first interface 34 and the second interface 35 are disposed on one side of the second rib 314 connected to the second flange 313, and are disposed on two sides of the second rib 314 respectively. As shown in fig. 3 and 4, the first rib 124 and the second rib 314 extend in the same or substantially the same direction, and the third interface, the fourth interface, the first interface and the second interface are disposed on the same side of the battery assembly. The flow directions of the fluids in the first flow channel and the second flow channel are opposite, namely the first flow channel and the second flow channel are arranged in a counter-flow mode, so that the heat exchange effect between the first flow channel and the second flow channel is relatively good, namely the heat exchange effect between the temperature equalizing device 1 and the heat exchange device 3 is improved. The dot and fork pattern shown in fig. 4 refers to the direction of flow of the fluid, with the fingers going into the page and the dots going out of the page.
As shown in fig. 11, in one embodiment of the battery cooling system, the battery cooling system includes a cooling circulation system and a battery 5, the cooling circulation system includes a heat exchange device 3, and the battery cooling system further includes a temperature equalization circulation system, and the temperature equalization circulation system and the cooling circulation system are independent of each other. It should be noted that "independent" means that the internal flow passages are independent and not connected. The temperature-equalizing circulation system comprises a temperature-equalizing device 1 and a first pump 105, an inlet of the temperature-equalizing device 1 is connected with an outlet of the first pump 105, an inlet of the first pump 105 is connected with an outlet of the temperature-equalizing device 1, one side of the temperature-equalizing device 1 is in direct or indirect contact with a battery 5, the other side of the temperature-equalizing device 1 is in direct or indirect contact with a heat exchange device 3, when the temperature-equalizing circulation system works, the heat exchange device 3 and the temperature-equalizing device 1 perform heat exchange, and the temperature-equalizing device and the battery 5 perform heat exchange. The first pump can drive the temperature-equalizing circulation system, at the moment, the fluid in the temperature-equalizing device 1 is in a flowing state, and in the flowing process, the cold part and the hot part of the fluid in the temperature-equalizing device 1 can be mixed, so that the temperature uniformity of the temperature-equalizing device 1 is relatively good. Furthermore, in the first pump 105, the cold and hot portions of the fluid may also be mixed. The fluid in the isothermal circulation system may be a liquid, such as a water-glycol mixture. No change in the phase state of the fluid is specified in the soaking cycle, but in principle it is possible.
The cooling circulation system further comprises a compressor 106, a condenser 107, an evaporator 109, a second throttling device 103 and a first throttling device 102, wherein an outlet of the compressor is connected with an inlet of the condenser, inlets of the second throttling device 103 and the first throttling device 102 are respectively connected with an outlet of the condenser, an outlet of the second throttling device 103 is connected with an inlet of the evaporator, an outlet of the evaporator 109 is connected with an inlet of the compressor, an outlet of the first throttling device is connected with an inlet of the heat exchange device, and an outlet of the heat exchange device is connected with an inlet of the compressor. In this case, the fluid in the cooling cycle is a refrigerant, for example, R134a, R744, or the like. The refrigerant absorbs heat when passing through the heat exchange device, i.e., indirectly cools the battery 5. It should be noted that "connected" may be directly connected or indirectly connected, that is, other components may be disposed between two connected components, such as a filter, a liquid reservoir, a gas-liquid separator, a solenoid valve, and the like. The evaporator 109 may exchange heat with the cabin 118 to regulate the temperature of the cabin 118.
In this embodiment, the first interface 34 of the heat exchanger 3 is communicated with the outlet of the external first throttling device 102, the second interface 35 is communicated with the inlet of the external compressor 106, the outlet of the external condenser 107 is connected with the inlet of the external first throttling device 102, and the inlet of the external condenser is connected with the outlet of the external compressor 106. The fluid flowing into the temperature equalizing device can circularly flow between the temperature equalizing device and the externally connected compressor, the first throttling device and the condenser.
The disassembled battery pack can be charged in a battery charging station. Since the battery generates heat during charging, the battery also needs to be cooled during charging at the charging station. In another embodiment of the battery cooling system, as shown in fig. 12, the temperature equalizing circulation system includes at least two temperature equalizing devices 1. The third interface of each temperature equalizing device 1 is connected with the outlet of the first pump 105, and the inlet of the first pump 105 is connected with the fourth interface of each temperature equalizing device. The number of the heat exchange devices 3 can also be at least two, the cooling circulation system further comprises a compressor, a condenser and at least two first throttling devices 102, outlets of the compressor are connected with inlets of the condenser, inlets of the first throttling devices 102 are respectively connected with outlets of the condenser, outlets of the first throttling devices 102 are connected with inlets of the corresponding heat exchange devices 3, and outlets of the heat exchange devices are respectively connected with inlets of the compressor. The battery cooling system can cool a plurality of batteries 5 at the same time. It should be noted that "connected" may be directly connected or indirectly connected, that is, other components may be disposed between two connected components, such as a filter, a liquid reservoir, a gas-liquid separator, a solenoid valve, and the like.
In another embodiment of a battery assembly, a temperature uniforming device includes a first sheet and a second sheet. The first plate and the second plate are fixed, the joint of the first plate and the second plate is sealed, a first flow channel is formed in the temperature equalizing device, and the temperature equalizing device does not have a third interface and a fourth interface, namely two ends of the first flow channel are arranged in a closed mode. The liquid is sealed in the first flow channel, the specific heat of the liquid is relatively large, the third plate of the heat exchange device cannot immediately influence the first plate surface of the temperature equalizing device, namely, the temperature change of the first plate surface of the temperature equalizing device lags behind the heat exchange device, and the temperature uniformity of the temperature equalizing device can be improved.
In another embodiment of the battery pack, as shown in fig. 5 to 7, the temperature equalizing device 1 further comprises at least two protrusions 17 protruding from the second plate surface, wherein the protrusions 17 are columnar, and the extending direction of the protrusions 17 is perpendicular or approximately perpendicular to the second plate surface. The projection 17 includes a circumferential wall 171, and the projection 17 is fixed to the second plate 12. The heat exchange device further comprises at least two first holes 30, the first holes 30 comprising inner wall portions 301 extending in the extension direction of the protrusions. A certain distance is kept between the connection part of the convex part and the second plate surface and the projection of the first flow channel on the second plate surface.
In other embodiments of the protrusion 17, the protrusion 17 may be fixed with the first plate. Alternatively, the protrusion 17 may be integral with the temperature equalization device.
As shown in fig. 6 and 7, the first hole 30 is disposed opposite the projection 17, and at least a portion of the projection 17 is inserted into the first hole 30 and at least a portion of the circumferential wall 171 of the projection 17 is in clearance fit with the inner wall 301 in the first hole in the first position. The battery pack is positioned in the direction parallel to the second plate surface 19, namely the temperature equalizing device and the heat exchange device are limited in the direction parallel to the second plate surface 19. Due to the at least two convex parts 17 and the at least two first holes 30, the temperature equalizing device and the heat exchanging device cannot rotate relatively.
In another embodiment of the battery assembly, as shown in fig. 8, the battery assembly further includes a thermal pad 6, the thermal pad 6 is disposed between the second plate 19 and the third plate 37, and the thermal pad 6 is made of an elastic material, such as silicone, so as to increase the area for conducting heat between the second plate 19 and the third plate 37, thereby enhancing the heat exchange capability.
In yet another embodiment of the battery assembly, as shown in fig. 9, the second fins 38 are heat dissipating fins and the fluid medium passing through the second fins 38 is air. Air may be delivered by, for example, a fan and a duct, and the air may be from outside the vehicle.
In yet another embodiment of the battery assembly, as shown in fig. 10, the battery assembly may include an elastic element 7, and the elastic element 7 may increase the pressure between the second plate surface 19 and the third plate surface 37 so that the second plate surface 19 and the third plate surface 37 are relatively closely attached. The fourth plate comprises a fourth plate surface 39. When the battery pack is mounted on the vehicle body, one end of the elastic element 7 abuts against the fourth plate surface, the elastic element 7 is in a compressed state, the other end of the elastic element 7 abuts against the other part of the vehicle body, and the elastic element 7 can apply a force to the fourth plate piece toward the second plate piece. The elastic element 7 may be a spring.
It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.
Claims (10)
1. A battery assembly comprises a battery (5), and is characterized in that the battery assembly comprises a temperature equalizing device (1), the temperature equalizing device (1) comprises a first plate (13) and a second plate (12), the first plate (13) and the second plate (12) are fixed, the joint of the first plate (13) and the second plate (12) is sealed, a first flow channel (16) is formed in the temperature equalizing device (1), the first plate (13) is provided with a first plate surface (11), the second plate (12) is provided with a second plate surface (19), and the first plate surface (11) is directly or indirectly contacted with the battery (5);
the battery component further comprises a heat exchange device (3), the temperature equalizing device is arranged between the heat exchange device and the battery, the heat exchange device (3) comprises a third plate (31) and a fourth plate (32), the third plate and the fourth plate are fixed, the connection position of the third plate and the fourth plate is sealed, and a second flow channel (36) is formed in the heat exchange device (3); the heat exchange device (3) further comprises a first interface (34) and a second interface (35), the first interface (34) is communicated with one end of the second flow channel (36), the second interface is communicated with the other end of the second flow channel (36), the third plate (31) is provided with a third plate surface (37) corresponding to the second plate surface (19), the third plate surface (37) is directly or indirectly contacted with the second plate surface (19), and the temperature equalizing device (1) and the heat exchange device (3) are detachably fixed, so that the heat exchange device can exchange heat with the battery through the temperature equalizing device.
2. The battery assembly according to claim 1, wherein the temperature equalizing device (1) further comprises a third interface (14) and a fourth interface (15), the third interface is communicated with one end of the first flow passage (16), the fourth interface is communicated with the other end of the first flow passage (16), the third interface is communicated with an inlet of an external water pump, the fourth interface is communicated with an outlet of the external water pump, and fluid flowing into the temperature equalizing device can circulate between the temperature equalizing device and the external water pump.
3. The battery pack according to claim 1 or 2, wherein the battery (5) includes a plurality of battery cells (51,52,53), the first plate surface (11) is in direct or indirect contact with each of the battery cells, each of the battery cells (51,52,53) corresponds to the first flow channel (16), the second flow channel (36) is provided in correspondence with the first flow channel (16), the first flow channel (16) extends in a direction parallel or substantially parallel to the first plate surface (11), and the second flow channel (36) extends in a direction parallel or substantially parallel to the first plate surface (11).
4. The battery pack according to claim 2, wherein the second plate (12) comprises a sixth plate surface (122) arranged on the back surface of the second plate surface (19), the second plate (12) further comprises a first flange (123) protruding from the sixth plate surface (122) and a first rib (124), and the first plate (13) is fixed with the first flange (123) and the first rib (124) and the connection is sealed;
or, the first plate (13) comprises a fifth plate surface (131) arranged on the back surface of the first plate surface (11), the first plate (13) further comprises a first flange (123) protruding from the fifth plate surface (131) and a first rib (124), and the second plate (12) is fixed with the first flange (123) and the first rib (124) and the connection part is sealed;
the first flange (123) surrounds at least the first rib (124), one end of the first rib (124) is connected with one side of the first flange (123), the other end of the first rib (124) is not connected with the other side of the first flange (123), and the second plate (12) and the first plate (13) define the first flow channel (16) therebetween;
the third interface (14) and the fourth interface (15) are close to one side of the first rib (124) connected with the first flange (123), and the third interface and the fourth interface are respectively arranged on two sides of the first rib (124).
5. The battery pack according to any one of claims 1 to 4,
the third plate sheet (31) comprises a seventh plate surface (312) arranged on the back surface of the third plate surface (37), the third plate sheet (31) further comprises a second flange (313) protruding from the seventh plate surface (312) and a second rib (314), and the fourth plate sheet (32) is fixed with the second flange (313) and the second rib (314) and the connection part is sealed;
or, the fourth plate (32) comprises an eighth plate surface (323) arranged on the back of the fourth plate surface (39), the fourth plate (32) further comprises a second flange (313) protruding from the eighth plate surface (323) and a second rib (314), and the third plate is fixed with the second flange and the second rib and the connection part of the third plate is sealed;
the second flange (313) at least surrounds the second rib (314), one end of the second rib (314) is connected with one side of the second flange (313), the other end of the second rib (314) is not connected with the other side of the second flange (313), and the third plate (31) and the fourth plate (32) define the second flow channel (36) therebetween;
the first interface (34) and the second interface (35) are close to one side of the second rib (314) connected with the second flange (313), and the first interface and the second interface are respectively arranged on two sides of the second rib (314).
6. The battery pack according to any one of claims 1 to 5, wherein the temperature equalizing device (1) further comprises at least two protrusions (17) protruding from the second plate surface (19), the protrusions (17) comprise a circumferential wall (171), the protrusions (17) are fixed to or integrally formed with the first plate and/or the second plate, the protrusions (17) extend in a direction perpendicular or substantially perpendicular to the second plate surface, and a joint of the protrusions and the second plate surface is spaced from a projection of the first flow channel on the second plate surface;
the heat exchange means (3) further comprises at least two first holes (30), the first holes (30) comprising an inner wall portion (301) extending in the extension direction of the protrusion (17);
the first hole is provided opposite to the convex portion, at least a part of the convex portion (17) is inserted into the first hole (30), and at least a part of a circumferential wall portion (171) of the convex portion (17) is clearance-fitted with an inner wall portion (301) of the first hole.
7. A battery pack according to claim 1, characterized in that the battery pack comprises an elastic element (7), the fourth sheet comprising a fourth plate face (39); one end of the elastic element (7) is abutted to the fourth plate surface (39), the elastic element is in a compressed state, and the elastic force of the elastic element faces the temperature equalizing device (1).
8. The battery assembly of claim 1, further comprising a first fin (18) and a second fin (38), the first fin (18) being disposed in the first flow channel and the second fin (38) being disposed in the second flow channel;
a heat conducting pad is arranged between the battery and the temperature equalizing device, and a heat conducting pad (6) is arranged between the temperature equalizing device and the heat exchanging device.
9. The battery assembly of claim 1, wherein the first interface of the heat exchanging device is in communication with an outlet of an external first throttling device, the second interface is in communication with an inlet of the external compressor, an outlet of an external condenser is connected with an inlet of the external first throttling device, and an inlet of the external condenser is connected with an outlet of the external compressor;
the fluid flowing into the temperature equalizing device can circularly flow between the temperature equalizing device and the externally-connected compressor, the first throttling device and the condenser.
10. The battery pack according to claim 4, wherein the first sheet (13) is a flat plate, and the heights of the first rib and the first flange protruding from the sixth plate surface (122) are the same or approximately the same;
the first flow channel comprises a plurality of parallel flow channels, one end of each parallel flow channel is communicated with the third interface, and the other end of each parallel flow channel is communicated with the fourth interface.
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| CN201910367857.XA CN111900512B (en) | 2019-05-05 | 2019-05-05 | Battery component |
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| CN201910367857.XA CN111900512B (en) | 2019-05-05 | 2019-05-05 | Battery component |
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