CN115799688A - Power battery with temperature sensor, power supply system and vehicle - Google Patents
Power battery with temperature sensor, power supply system and vehicle Download PDFInfo
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- CN115799688A CN115799688A CN202211422938.3A CN202211422938A CN115799688A CN 115799688 A CN115799688 A CN 115799688A CN 202211422938 A CN202211422938 A CN 202211422938A CN 115799688 A CN115799688 A CN 115799688A
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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
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Abstract
The invention discloses a power battery with a temperature sensor, a power supply system and a vehicle, wherein the power battery comprises a shell unit, and an inlet flow control valve, an outlet flow control valve, a circuit board, at least one temperature sensor and at least two battery monomers which are respectively arranged on the shell unit, at least one battery monomer and the temperature sensor are connected to the circuit board, cooling liquid can enter a fluid distribution channel of the shell unit through the inlet flow control valve and can be discharged out of the shell unit from a fluid gathering channel of the shell unit through the outlet flow control valve so as to reduce the working temperature of the battery monomers, the temperature sensor is used for monitoring the working temperature of the battery monomers, and the power battery is allowed to stop working when the working temperature of the battery monomers is too high and explosion risks exist.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a power battery with a temperature sensor, a power supply system and a vehicle.
Background
In recent years, electric vehicles equipped with a battery such as a lithium ternary battery, a lithium iron phosphate battery, or the like have been increasingly popular. Different from the traditional fuel oil automobile, the battery of the electric automobile can generate a large amount of heat no matter when being charged or discharged, and how to effectively cool the battery so that the battery can work in a proper temperature environment is a problem which is focused by experts and designers in the field of electric automobiles. If the battery continuously works in a high-temperature environment, the performance and the service life of the battery are influenced, and the battery has a greater explosion risk, so that a serious potential safety hazard is brought to a driver and passengers.
Disclosure of Invention
An object of the present invention is to provide a power battery with a temperature sensor, a power supply system and a vehicle, wherein the power battery provides a flow passage for flowing cooling liquid for reducing the temperature of a battery cell when the power battery works.
One object of the present invention is to provide a power battery, a power supply system and a vehicle with a temperature sensor, wherein the power battery is provided with at least one temperature sensor for monitoring the working temperature of the battery cell. Preferably, the temperature sensor is suspended from the coolant to allow the temperature sensor to monitor the operating temperature of the battery cell by monitoring the temperature of the coolant.
An object of the present invention is to provide a power battery with a temperature sensor, a power supply system, and a vehicle, wherein the power battery provides an explosion-proof unit for reliably fixing a cover and a case of a housing unit of the power battery to restrict an explosion range to the inside of the housing unit as much as possible when the battery cell explodes in the closed space formed by the housing unit.
An object of the present invention is to provide a power battery, a power supply system and a vehicle with a temperature sensor, wherein the power battery is provided with an inlet flow control valve and an outlet flow control valve for controlling the flow of cooling fluid into and out of the power battery, wherein when the temperature sensor monitors that the working temperature of the battery cell is too high, so that the power battery has an explosion risk, the power battery stops working and the temperature is not increased any more, and simultaneously the inlet flow control valve and the outlet flow control valve control the flow of cooling fluid into and out of the power battery, so as to avoid affecting other power batteries. In accordance with one aspect of the present invention, there is provided a power cell with a temperature sensor, comprising:
an inlet flow control valve;
an outlet flow control valve;
at least two battery cells;
a circuit board, wherein said circuit board is connected to at least one of said battery cells;
at least one temperature sensor, wherein the temperature sensor is connected to the circuit board; and
a housing unit, wherein the housing unit further comprises:
a cover, wherein the circuit board and the temperature sensor are respectively disposed on the cover; and
a housing, wherein said housing includes a housing main body and at least one partition plate, and said housing has at least two battery mounting cavities, a fluid distribution channel, a fluid convergence channel, a plurality of branch channels, an inlet mounting hole and an outlet mounting hole, said partition plate is located inside said housing main body to form said battery mounting cavity between said housing main body and said partition plate, said fluid distribution channel and said fluid convergence channel are located at opposite ends of said battery mounting cavity, respectively, and an extending direction of said fluid distribution channel and an extending direction of said battery mounting cavity are perpendicular to each other, an extending direction of said fluid convergence channel and an extending direction of said battery mounting cavity are perpendicular to each other, these branch channels are communicated with said fluid distribution channel and said fluid convergence channel, respectively, and at least one of said branch channels is formed in said partition plate, wherein said inlet control valve is mounted to said inlet mounting hole of said housing, said outlet control valve is mounted to said outlet mounting hole of said housing, wherein said battery cell is mounted to said battery mounting cavity of said housing, wherein said cover plate is mounted to said housing such that said battery cell, said temperature sensor and said cover plate are held in a space enclosed by said cover plate and said fluid distribution channel, and said cover plate, and said fluid convergence channel is held in said housing.
According to one embodiment of the invention, the power battery comprises two temperature sensors, one of which is suspended from the fluid distribution channel of the housing and the other of which is suspended from the fluid collection channel of the housing.
According to one embodiment of the invention, the temperature sensor suspended from the fluid distribution channel of the housing is adjacent the inlet flow control valve and the temperature sensor suspended from the fluid converging channel of the housing is adjacent the outlet flow control valve.
According to an embodiment of the present invention, the inlet mounting hole and the outlet mounting hole of the housing are formed at the same end of the case main body.
According to an embodiment of the present invention, the inlet mounting hole and the outlet mounting hole of the housing are formed at opposite ends of the housing main body.
According to an embodiment of the invention, the power battery further comprises a buffer unit, and the buffer unit is arranged between the shell main body and the battery cell.
According to an embodiment of the present invention, the cover has two conductive holes, wherein the power battery further includes two conductive units, each of the conductive units includes an extension conductor and a conductive protrusion disposed on the extension conductor, wherein one electrode of each of the battery cells is connected to the extension conductor of one of the conductive units, and the other electrode of each of the battery cells is connected to the extension conductor of the other of the conductive cells, and wherein the conductive protrusion of each of the conductive units extends to and protrudes from the top surface of the cover through each of the conductive holes of the cover.
According to an embodiment of the invention, the power battery further comprises an explosion-proof unit, wherein the explosion-proof unit comprises four extension legs, the four extension legs integrally extend downwards from four corners of the cover body to a position exposing the bottom surface of the shell main body respectively, and the free ends of the four extension legs are respectively provided with a locking hole.
According to one embodiment of the invention the structure of said inlet flow control valve and the structure of said outlet flow control valve are identical.
According to another aspect of the present invention, there is further provided a power supply system including a first cooling duct, a second cooling duct, a control portion, and a plurality of power batteries with temperature sensors, wherein the power batteries include:
an inlet flow control valve;
an outlet flow control valve;
at least two battery cells;
a circuit board, wherein said circuit board is connected to at least one of said battery cells;
at least one temperature sensor, wherein said temperature sensor is connected to said circuit board; and
a housing unit, wherein the housing unit further comprises:
a cover, wherein the circuit board and the temperature sensor are respectively arranged on the cover; and
a case, wherein the case includes a case main body and at least one partition, and the case has at least two battery mounting cavities, a fluid distribution channel, a fluid convergence channel, a plurality of branch channels, an inlet mounting hole, and an outlet mounting hole, the partition is located inside the case main body to form the battery mounting cavities between the case main body and the partition, the fluid distribution channel and the fluid convergence channel are located at opposite ends of the battery mounting cavities, respectively, and an extending direction of the fluid distribution channel and an extending direction of the battery mounting cavities are perpendicular to each other, the extending direction of the fluid convergence channel and the extending direction of the battery mounting cavities are perpendicular to each other, and the branch channels are communicated with the fluid distribution channel and the fluid convergence channel, respectively, and at least one of the branch flow channels is formed in the partition plate, wherein the inlet flow control valve is mounted to the inlet mounting hole of the case, and the outlet flow control valve is mounted to the outlet mounting hole of the case, wherein the battery cell is mounted to the battery mounting cavity of the case, wherein the cover is provided to the case such that the battery cell, the circuit board, and the temperature sensor are held in a sealed space formed by the case and the cover, and the cover suspends the temperature sensor in the fluid distribution channel or the fluid convergence channel, wherein each of the power batteries is controllably connected to the control portion, respectively, and the inlet flow control valve of each of the power batteries is communicated with the first cooling duct, respectively,
the outlet flow control valve of each power battery is communicated with the second cooling pipeline respectively.
A vehicle comprising a vehicle body and a power supply system, wherein the power supply system is provided to the vehicle body, wherein the power supply system further comprises a first cooling duct, a second cooling duct, a control portion, and a plurality of power batteries with temperature sensors, wherein the power batteries include:
an inlet flow control valve;
an outlet flow control valve;
at least two battery cells;
a circuit board, wherein said circuit board is connected to at least one of said battery cells;
at least one temperature sensor, wherein said temperature sensor is connected to said circuit board; and
a housing unit, wherein the housing unit further comprises:
a cover, wherein the circuit board and the temperature sensor are respectively disposed on the cover; and
a case, wherein the case includes a case main body and at least one partition, and the case has at least two battery mounting cavities, a fluid distribution channel, a fluid convergence channel, a plurality of branch channels, an inlet mounting hole, and an outlet mounting hole, the partition is located inside the case main body, so as to form the battery installation cavity between the case main body and the partition plate, the fluid distribution channel and the fluid convergence channel are respectively positioned at two opposite ends of the battery installation cavity, and the extending direction of the fluid distribution channel and the extending direction of the battery mounting cavity are perpendicular to each other, the extending direction of the fluid converging channel and the extending direction of the battery mounting cavity are perpendicular to each other, the branch passages are respectively communicated with the fluid distribution passage and the fluid convergence passage, and at least one branch passage is formed in the partition plate, wherein the inlet flow control valve is mounted to the inlet mounting hole of the housing, the outlet flow control valve is mounted to the outlet mounting hole of the housing, wherein the battery cell is mounted to the battery mounting cavity of the case, wherein the cover is provided to the case, so that the battery cell, the circuit board, and the temperature sensor are held in a sealed space formed by the case and the lid, and the cover body suspends the temperature sensor from the fluid distribution channel or the fluid convergence channel, wherein each of the power batteries is respectively and controllably connected to the control part, the inlet flow control valve of each of the power batteries is respectively communicated with the first cooling pipeline, and the outlet flow control valve of each of the power batteries is respectively communicated with the second cooling pipeline.
Drawings
Fig. 1 is an exploded view of the power battery according to the above preferred embodiment of the present invention.
Fig. 2 is an exploded view of the power battery according to another view of the above preferred embodiment of the present invention.
Fig. 3 is a perspective view of an inlet flow control valve of the power battery according to the above preferred embodiment of the invention.
Fig. 4 is a perspective view of another view of the inlet flow control valve of the power battery according to the above preferred embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of the inlet flow control valve of the power battery according to the above preferred embodiment of the invention.
Fig. 6 is an exploded view of a view angle of the inlet flow control valve of the power battery according to the above preferred embodiment of the present invention.
Fig. 7 is an exploded view of another view of the inlet flow control valve of the power battery according to the above preferred embodiment of the present invention.
FIG. 8 is a top view of a power supply system according to a preferred embodiment of the present invention.
Fig. 9 is a schematic cross-sectional view of a partial structure of the power supply system according to the above preferred embodiment of the invention.
Fig. 10 is an enlarged schematic view of a partial position of fig. 9.
FIG. 11 is a perspective view of a vehicle according to a preferred embodiment of the present invention.
Fig. 12 is a partial structural view of the vehicle according to the above preferred embodiment of the present invention.
Detailed Description
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.
Also, in the disclosure of the present invention, in the first aspect, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms are not to be construed as limiting the present invention; in a second aspect, the terms "a" and "an" should be taken to mean "at least one" or "one or more," i.e., in one embodiment, a number of an element can be one, while in another embodiment, the number of the element can be more, and the terms "a" and "an" should not be taken to limit the number.
Referring to fig. 8 of the drawings accompanying the present specification, a power supply system 1000 according to a preferred embodiment of the present invention will be disclosed and explained in the following description, wherein the power supply system 1000 includes a plurality of power batteries 100 with temperature sensors (hereinafter, "power batteries 100 with temperature sensors" will be simply referred to as "power batteries 100") and a control portion 200, and each of the power batteries 100 is respectively and controllably connected to the control portion 200 so that the control portion 200 controls the operating state of each of the power batteries 100.
Preferably, each of the power cells 100 of the power supply system 1000 is connected in parallel, and the control part 200 is capable of individually controlling the operating state of each of the power cells 100, such that each of the power cells 100 is independent from each other, so that the operating state of one of the power cells 100 does not affect the operating state of the other power cell 100.
Fig. 1 to fig. 7 show a specific structure of the power battery 100, wherein the power battery 100 includes a housing unit 10, and at least two battery cells 20, at least one temperature sensor 30 and a circuit board 40, which are respectively disposed on the housing unit 10.
Specifically, the housing unit 10 includes a case 11 and a cover 12. The housing 11 further includes a housing main body 111 and at least one partition 112, and the housing 11 has at least two battery mounting cavities 113, the partition 112 is located inside the housing main body 111 to form the battery mounting cavities 113 between the housing main body 111 and the partition 112, wherein the battery cells 20 are mounted in the battery mounting cavities 113 of the housing 11. The lid 12 is provided to the case 11 such that the battery cell 20 is held in a sealed space formed by the case 11 and the lid 12.
In some embodiments, the case main body 111 and the partition 112 of the case 11 may be a unitary structure, for example, the case main body 111 and the partition 112 of the case 11 may be injection molded from a plastic material, or the case main body 111 and the partition 112 of the case 11 may be made from a metal material (e.g., aluminum material) to improve the heat dissipation capability of the power battery 100. In other embodiments, the case main body 111 and the partition 112 of the case 11 may be provided separately, and the partition 112 is installed inside the case main body 111 to partition the inner space of the case main body 111 by the partition 112 to allow the case 11 to form the battery mounting cavity 113.
The manner of providing the cover 12 to the case 11 is not limited in the power battery 100 of the present invention, as long as a sealed space for holding the battery cells 20 can be formed between the case 11 and the cover 12. For example, in some embodiments, the cover 12 may be adhered to the housing 11 by glue, so as to fixedly dispose the cover 12 on the housing 11 and form a sealed space between the cover 12 and the housing 11 for holding the battery cell 20; in other embodiments, the cover 12 may be screwed to the housing 11 to fixedly dispose the cover 12 on the housing 11 and form a sealed space between the cover 12 and the housing 11 for holding the battery cell 20. Preferably, the power battery 100 may be provided with a sealing gasket (e.g., a rubber gasket) between the cover 12 and the housing 11 to increase the sealing performance between the cover 12 and the housing 11.
At least one of the battery cells 20 is connected to the circuit board 40 to allow the battery cell 20 to supply power to the circuit board 40 and allow the circuit board 40 to be in an operating state. The temperature sensor 30 is connected to the circuit board 40, and the temperature sensor 30 and the circuit board 40 are both held in the sealed space formed by the housing 11 and the cover 12, wherein the temperature sensor 30 is configured to monitor the operating temperature of the battery cell 20, and the circuit board 40 is configured to send the monitoring data of the temperature sensor 30 to the control portion 200, so as to control the operating state of the power battery 100 by the control portion 200 according to the monitoring data of the temperature sensor 30.
Specifically, when the monitored data of the temperature sensor 30 indicates that the operating temperature of the battery cell 20 is in a suitable range, the control portion 200 allows the power battery 100 to output electric energy to the outside or allows the commercial power to be supplemented to the power battery 100. Accordingly, when the monitoring data of the temperature sensor 30 indicates that the working temperature of the battery cell 20 is too high and there is an explosion risk, the control portion 200 prevents the power battery 100 from outputting electric energy to the outside or prevents the commercial power from being supplemented to the power battery 100, so that, on one hand, the power battery 100 is prevented from continuously working, so as to prevent the temperature of the battery cell 20 of the power battery 100 from continuously increasing and eliminate the explosion risk, and on the other hand, the power battery 100 in the stopped working state does not affect the working states of the other power batteries 100, so that the power supply system 1000 as a whole can continuously work.
More specifically, the circuit board 40 is mounted with a control chip (MCU) 41 and a communication chip 42 and a memory chip 43 connected to the control chip 41, respectively, and the temperature sensor 30 is connected to the control chip 41, wherein the control chip 41 is capable of transmitting monitoring data of the temperature sensor 30 to the control portion 200 through the communication chip 42 when executing instructions stored in the memory chip 43. In some embodiments, the communication chip 42 may transmit the monitoring data of the temperature sensor 30 to the control portion 200 via a wireless network based on a wireless transmission protocol (e.g., bluetooth protocol, wi-Fi protocol); in other embodiments, the communication chip 42 may transmit the monitoring data of the temperature sensor 30 to the control portion 200 through a physical line. In other words, the circuit board 40 and the control portion 200 of the power battery 100 may be connected wirelessly or through a wire, which is selected as needed.
Preferably, referring to fig. 2, the temperature sensor 30 and the circuit board 40 are respectively disposed on the cover 12, and the temperature sensor 30 and the circuit board 40 are held in a sealed space formed by the cover 12 and the housing 11 when the cover 12 is disposed on the housing 11. Preferably, the temperature sensor 30 and the circuit board 40 are connected by a physical line.
With continued reference to fig. 1, the power battery 100 further includes two conductive units 50, and each conductive unit 50 includes an extended conductive body 51 and a conductive protrusion 52 disposed on the extended conductive body 51. One electrode of each battery cell 20 is connected to the extension conductor 51 of one of the conductive units 50, and the other electrode of each battery cell 20 is connected to the extension conductor 51 of the other conductive unit 50, so that each battery cell 20 of the power battery 100 can be connected in series through the conductive units 50. The cover 12 has two conductive holes 121, wherein the extended conductor 51 of each conductive unit 50 is held in the sealed space formed by the cover 12 and the housing 11, and the conductive protrusion 52 of each conductive unit 50 extends to and protrudes from the top surface 122 of the cover 12 through the conductive hole 121 of the cover 12, so as to connect the power battery 100 and the control portion 200.
It should be noted that the connection manner of the electrode of each battery cell 20 and the extension conductor 51 of the conductive unit 50 is not limited in the power battery 100 of the present invention. For example, in some embodiments, the electrodes of the battery cells 20 and the extension conductors 51 of the conductive unit 50 may be connected by spot welding.
Referring to fig. 1 and 9, the power battery 100 further includes a buffer unit 60, where the buffer unit 60 is disposed between the case main body 111 of the case 11 and the battery cell 20, so that when a vehicle to which the power supply system 1000 is applied runs, the abnormal sound of the vehicle can be reduced, and the battery cell 20 can be prevented from shaking to ensure the safety of the power battery 100. Preferably, the buffer unit 60 may be formed of a foaming material having good thermal conductivity, such as a polyurethane foam.
With continued reference to fig. 1 to 7, the housing 11 further has a fluid distribution channel 114, a fluid convergence channel 115, a plurality of branch channels 116, an inlet mounting hole 117, and an outlet mounting hole 118, wherein the fluid distribution channel 114 and the fluid convergence channel 115 are respectively located at opposite ends of the battery mounting cavity 113, the extending direction of the fluid distribution channel 114 and the extending direction of the battery mounting cavity 113 are perpendicular to each other, the extending direction of the fluid convergence channel 115 and the extending direction of the battery mounting cavity 113 are perpendicular to each other, the branch channels 116 are respectively communicated with the fluid distribution channel 114 and the fluid convergence channel 116, and at least one of the branch channels 116 is formed in the partition plate 112, wherein the inlet mounting hole 117 is communicated with the fluid distribution channel 114, and the outlet mounting hole 118 is communicated with the fluid convergence channel 115. The power cell 100 further includes an inlet flow control valve 70 mounted to the inlet mounting hole 117 of the housing 11 for allowing or preventing cooling fluid from entering the fluid distribution channel 114 of the housing 11. The power cell 100 further includes an outlet flow control valve 80 mounted to the outlet mounting hole 118 of the housing 11 for allowing or preventing the coolant from exiting the fluid converging channel 115 of the housing 11.
Specifically, the fluid distribution channel 114, the fluid convergence channel 115, and a part of the branch channel 116 of the housing 11 are respectively formed on a side wall of the housing main body 111, for example, the side wall of the housing main body 111 is a double-layer structure for forming the fluid distribution channel 114, the fluid convergence channel 115, and the branch channel 116, respectively. Another part of the branch passage 116 is formed in the partition plate 112, for example, the partition plate 112 has a double-layer structure for forming the branch passage 116.
More specifically, in order to facilitate the formation of the fluid distribution channel 114, the fluid convergence channel 115, and a part of the branch channel 116 by the shell main body 111 of the housing 11 and another part of the branch channel 116 by the partition plate 112, when the housing 11 is manufactured, the shell main body 111 having a double-layered structure of a side wall is allowed to have a top opening and the partition plate 112 having a double-layered structure has a top opening, wherein when the cover body 12 is set to the housing 11, the top opening of the shell main body 111 and the top opening of the partition plate 112 are closed by the cover body 12, so that the shell main body 111 of the housing 11 forms the fluid distribution channel 114, the fluid convergence channel 115, and a part of the branch channel 116 and so that the partition plate 112 forms another part of the branch channel 116. The cover 12 suspends the temperature sensor 30 from the fluid distribution channel 114 or the fluid collection channel 115 of the housing 11 to monitor the temperature of the battery cell 20 by monitoring the temperature of the coolant entering the housing 11.
With continued reference to fig. 9, the power supply system 1000 further includes a first cooling duct 300 and a second cooling duct 400, wherein the inlet flow control valve 70 of the power battery 100 is communicated with the first cooling duct 300 to allow or prevent the coolant from entering the fluid distribution channel 114 of the housing 11 from the first cooling duct 300, and wherein the outlet flow control valve 80 of the power battery 100 is communicated with the second cooling duct 400 to allow or prevent the coolant from being discharged from the fluid collection channel 115 of the housing 11 to the second cooling duct 400.
In this specific example of the power cell 100 of the present invention shown in fig. 1 to 7, the inlet mounting hole 117 and the outlet mounting hole 118 of the housing 11 are respectively formed at the same end of the housing main body 111, so that the inlet flow control valve 70 and the outlet flow control valve 80 are provided at the same end of the housing main body 111, so that the first cooling duct 300 and the second cooling duct 400 can both be located at the same end of the power cell 100.
Alternatively, in other examples of the power battery 100 of the present invention, the inlet mounting hole 117 and the outlet mounting hole 118 of the housing 11 are formed at opposite ends of the case main body 111, such that the inlet flow control valve 70 and the outlet flow control valve 80 are disposed at opposite ends of the case main body 111, such that the first cooling duct 300 may be located at one end of the power battery 100, and accordingly, the second cooling duct 400 may be located at the other end of the power battery 100.
Preferably, the structure of the inlet flow control valve 70 and the structure of the outlet flow control valve 80 of the power battery 100 may be identical to facilitate assembly of the power battery 100. In a specific example of the power battery 100 of the present invention, the inlet flow control valve 70 is a check valve, when the pressure of the coolant inside the first cooling duct 300 is greater than the pressure of the coolant inside the fluid distribution channel 114 of the housing 11, the coolant inside the first cooling duct 300 can flow to the inside of the fluid distribution channel 114 of the housing 11 through the inlet flow control valve 70, and the inlet flow control valve 70 prevents the coolant inside the fluid distribution channel 114 of the housing 11 from being discharged to the first cooling duct 300. Accordingly, the outlet flow control valve 80 is a check valve, and when the pressure of the cooling liquid inside the second cooling pipe 400 is lower than the pressure of the cooling liquid inside the fluid collecting passage 115 of the housing 11, the cooling liquid inside the fluid collecting passage 115 of the housing 11 can flow to the second cooling pipe 400 through the outlet flow control valve 80. The coolant can remove heat generated by the battery cell 20 to lower the operating temperature of the battery cell 20.
Fig. 3 to 7 show the specific structure of the inlet flow control valve 70 and the outlet flow control valve 80. Since the inlet flow control valve 70 and the outlet flow control valve 80 are identical in structure, the specific structure of the inlet flow control valve 70 and the outlet flow control valve 80 will be further described below by taking the inlet flow control valve 70 as an example for ease of understanding.
Specifically, the inlet flow control valve 70 includes a valve seat 71, a valve stem 72, a valve cover 73, a return element 74, and a suspension mechanism 75.
The valve seat 71 is mounted to the inlet mounting hole 117 of the housing main body 111 of the housing 11, and the valve seat 71 has a valve seat penetration hole 711.
The valve rod 72 has a first connection end 721, a second connection end 722, a rod runner 723 and at least one rod channel 724, wherein the first connection end 721 and the second connection end 722 correspond to each other, the rod runner 723 extends from the first connection end 721 to the second connection end 722, and the rod channel 724 extends from the peripheral wall of the valve rod 72 to the rod runner 723 at the second connection end 722, so that the rod channel 724 and the rod runner 723 are communicated. The valve rod 72 is movably installed to the valve seat penetration hole 711 of the valve seat 71, and the outer diameter dimension of the valve rod 72 is equal to the inner diameter dimension of the valve seat 71, so that the peripheral wall of the valve rod 72 and the inner wall of the valve seat 71 are closely attached to avoid a gap between the peripheral wall of the valve rod 72 and the inner wall of the valve seat 71. Preferably, the peripheral wall of the valve stem 72 is a smooth peripheral wall, and the inner wall of the valve seat 71 is a smooth inner wall, so as to reduce the frictional force between the peripheral wall of the valve stem 72 and the inner wall of the valve seat 71.
The valve cover 73 is mounted on the second connection end 722 of the valve rod 72, so that when the valve rod 72 moves relative to the valve seat 71, the valve rod 72 can drive the valve rod 72 to move towards a direction close to the valve seat 71, and the valve cover 73 can be tightly attached to the valve seat 71. The manner in which the valve cap 73 is mounted to the second connection end 722 of the valve stem 72 is not limited in the power battery 100 of the present invention, for example, in some embodiments, the valve cap 73 may have a threaded groove 730, the second connection end 722 of the valve stem 72 is a threaded end, and the second connection end 722 of the valve stem 72 is screwed into the threaded groove 730 of the valve cap 73 to mount the valve cap 73 to the second connection end 722 of the valve stem 72. Alternatively, in other examples of the power battery 100 of the present invention, the valve cover 73 and the second connection end 722 of the valve rod 72 may be welded.
The suspension mechanism 75 includes a coil 751 and at least one magnet 752 corresponding to the coil 751, the coil 751 is disposed on the valve seat 71 and connected to the circuit board 40, the magnet 752 is disposed on the valve stem 72, and the return member 74 is disposed between the coil 751 and the valve stem 72. When the power battery 100 is in a normal state (i.e., when the control portion 200 determines that the battery cell 20 has no explosion risk according to the monitoring data of the temperature sensor 30), the battery cell 20 may always supply power to the coil 751 through the circuit board 40, so that the valve stem 72 is suspended in a state where the stem channel 724 of the valve stem 72 is exposed, and at this time, the coolant inside the first cooling duct 300 can flow to the fluid distribution channel 114 of the housing 11 through the stem flow channel 723 and the stem channel 724 of the valve stem 72 in sequence. When the power battery 100 is abnormal (i.e. when the control portion 200 determines that there is an explosion risk in the battery cell 20 according to the monitoring data of the temperature sensor 30), on one hand, the control portion 200 prevents the power battery 100 from operating continuously to avoid the temperature of the battery cell 20 of the power battery 100 from increasing continuously to eliminate the explosion risk, and on the other hand, the circuit board 40 prevents the battery cell 20 from supplying power to the coil 751 of the suspension mechanism 75, at this time, the electromagnetic field generated by the coil 751 disappears, and at the same time, under the pushing of the reset element 74, the valve rod 72 drives the valve cover 73 to move relative to the valve seat 71 to close the rod channel 724 of the valve rod 72 by the valve seat 71, so as to prevent the coolant inside the first cooling pipeline 300 from flowing to the fluid distribution channel 114 of the housing 11, and in this way, the power battery 100 in the stopped operating state does not affect the operating states of other power batteries 100, so that the power supply system 1000 as a whole can operate continuously.
In other words, the inlet flow control valve 70 of the power battery 100 of the present invention is a normally open flow control valve, when the power battery 100 is in a normal state, the coil 751 of the suspension mechanism 75 can continuously generate an electromagnetic field, the electromagnetic field of the coil 751 and the magnetic field of the magnet 752 interact to make the valve stem 72 suspended in the stem channel 724 of the valve stem 72 exposed, and since the outer diameter of the valve stem 72 is equal to the inner diameter of the valve seat 71, the peripheral wall of the valve stem 72 and the inner wall of the valve seat 71 are tightly attached, so that the coolant entering the fluid distribution channel 114 of the housing 11 through the stem flow channel 723 and the stem channel 724 of the valve stem 72 cannot enter between the valve stem 72 and the valve seat 71. After the coil 751 of the suspension mechanism 75 is de-energized, the valve rod 72 is held by the reset element 74 in a state that the inner wall of the valve seat 71 closes the rod channel 724 of the valve rod 72, and the valve cover 73 is attached to the valve seat 71, at this time, the cooling liquid entering the fluid distribution channel 114 of the housing 11 through the rod flow channel 723 of the valve rod 72 and the rod channel 724 cannot enter between the valve rod 72 and the valve seat 71, and at the same time, the fluid inside the first cooling pipe 300 cannot continue to enter the rod flow channel 723 of the valve rod 72.
It should be noted that the manner in which the magnet 752 is provided to the valve stem 72 is not limited in the power battery 100 of the present invention. For example, the valve rod 72 may have an insertion groove, and the magnet 752 may be fitted into the insertion groove in the valve rod 72.
Preferably, the return element 74 is a spring that is fitted to the valve stem 72, and the valve stem 72 further has an abutment ring 725, wherein one end of the return element 74 abuts against the abutment ring 725 of the valve stem 72 and the other end abuts against the coil 751 to allow the return element 74 to be securely held between the coil 751 and the valve stem 72 of the suspension mechanism 75.
Preferably, the first connection end 721 of the valve stem 72 of the inlet flow control valve 70 of the power battery 100 is connected to the first cooling duct 300 through a length-variable bellows, wherein the bellows does not affect the switching of the inlet flow control valve 70 from the open state to the closed state. Accordingly, the first connection end 721 of the valve stem 72 of the outlet flow control valve 80 of the power cell 100 is connected to the second cooling duct 400 by a length-variable bellows, which does not affect the switching of the outlet flow control valve 80 from the open state to the closed state.
Further, referring to fig. 5 and 7, the valve seat 71 has a holding chamber 712, wherein the coil 751 is disposed in the holding chamber 712 of the valve seat 71.
With continued reference to fig. 5-7, the inlet flow control valve 70 further includes a retaining ring 76, the retaining ring 76 being mounted to the valve seat 71 such that the valve seat 71 and the retaining ring 76 cooperate to securely mount the inlet flow control valve 70 to the inlet mounting aperture 117 of the housing 11. Preferably, the valve seat 71 has an external thread structure, the retaining ring 76 has an internal thread structure, and the external thread structure of the valve seat 71 and the internal thread structure of the retaining ring 76 cooperate to mount the retaining ring 76 to the valve seat 71.
With continued reference to fig. 8 to 10, the power supply system 1000 includes a plurality of the power batteries 100, the control portion 200, the first cooling duct 300, and the second cooling duct 400. The power batteries 100 are respectively connected to the control part 200 in a parallel manner to control the operating states of the power batteries 100 by the control part 200, for example, the circuit boards 40 of the power batteries 100 are respectively connected to the control part 200 through a connection line 500 to realize data transmission between the circuit boards 40 of the power batteries 100 and the control part 200. The first connection ends 721 of the valve stems 72 of the inlet flow control valves 70 of the power batteries 100 are respectively communicated with the first cooling duct 300 through a bellows, and the circuit board 40 of the power batteries 100 allows the electric power of the battery cells 20 to be supplied to the coils 751, so that the valve stems 72 are suspended in a state in which the stem passages 724 of the valve stems 72 are exposed, whereby the cooling liquid inside the first cooling duct 300 can flow to the fluid distribution passage 114 of the housing 11 through the bellows, the stem flow passages 723 of the valve stems 72 and the stem passages 724 in sequence. The first connection ends 721 of the valve stems 72 of the outlet flow control valves 80 of the power batteries 100 are respectively communicated with the second cooling ducts 400 through a bellows, and the circuit board 40 of the power batteries 100 allows the electric power of the battery cells 20 to be supplied to the coils 751, so that the valve stems 72 are suspended in a state where the stem passages 724 of the valve stems 72 are exposed, so that the fluid inside the fluid converging passages 115 of the housing 11 can flow to the second cooling ducts 400 through the stem passages 724 of the valve stems 72 and the stem flow passages 723 in sequence and bellows.
Referring to fig. 9 and 10, after the coolant in the first cooling channel 300 flows to the fluid distribution channel 114 of the housing 11 through the corrugated tube, the rod body flow channel 723 of the valve rod 72 and the rod body channel 724 in sequence, the fluid distribution channel 114 can distribute the coolant to each branch channel 116, and since the branch channels 116 are located at the side of the battery cells 20 and the extending direction of the branch channels 116 is the same as the width direction of the battery cells 20, the coolant can take away heat generated by the battery cells 20 in the process of flowing from the fluid distribution channel 114 to the fluid converging channel 115, so as to reduce the problem of the battery cells 20. The coolant collected to the fluid collecting channel 115 can sequentially flow to the second cooling channel 400 through the rod channel 724 of the valve rod 72, the rod flow channel 723 and a bellows.
In this specific example of the power supply system 1000 shown in fig. 8 and 9, the power battery 100 includes two temperature sensors 30, wherein one of the temperature sensors 30 is suspended by the cover 12 from the fluid distribution channel 114 of the housing 11 for monitoring the temperature of the cooling fluid entering the fluid distribution channel 114 of the housing 11 through the inlet flow control valve 70, and the other temperature sensor 30 is suspended by the cover 12 from the fluid converging channel 115 of the housing 11 for monitoring the temperature of the cooling fluid converging to the fluid converging channel 115 of the housing 11, and after the control portion 200 acquires the monitoring data of the two temperature sensors 30, the control portion 200 can determine the temperature generated by the battery cells 20 of the power battery 100 during operation according to the monitoring data of the two temperature sensors 30, so as to determine whether the battery cells 20 operate within a suitable temperature range.
If the control part 200 judges that the battery cells 20 of the power battery 100 operate in a suitable temperature range according to the monitoring data of the two temperature sensors 30, the control part 200 maintains the existing operating state. If the control portion 200 determines from the monitoring data of the two temperature sensors 30 that the operating temperatures of the battery cells 20 of the power battery 100 are too high and there is a risk of explosion, on the one hand, the control portion 200 prevents the power battery 100 from operating continuously to avoid the temperature of the battery cells 20 of the power battery 100 from increasing continuously to eliminate the risk of explosion, on the other hand, the control portion 200 prevents the battery cells 20 from supplying power to the coil 751 of the suspension mechanism 75 of the inlet flow control valve 70 through the circuit board 40, at which time the electromagnetic field generated by the coil 751 disappears, and under the urging of the reset element 74, the valve stem 72 drives the valve cap 73 to move relative to the valve seat 71 to close the stem channel 724 of the valve stem 72 by the valve seat 71, so as to prevent the coolant inside the first cooling pipe 300 from flowing continuously to the fluid distribution channel 114 of the housing 11, and accordingly, the control portion 200 prevents the battery cells 20 from supplying power to the coil 751 of the suspension mechanism 75 of the outlet flow control valve 80 through the circuit board 40, at which time the coil 751 generates the electromagnetic field generated by the coil 751 does not influence the operation of the valve stem 72 to move relative to the other cooling pipe 724 of the second cooling pipe 80, in such a state that the cooling pipe 751 does not influence the operation of the cooling pipe 70 on the cooling pipe 70, so that the power supply system 1000 as a whole can continue to operate.
Referring to fig. 11 and 12, the present invention further provides a vehicle, which includes a vehicle body 2000 and the power supply system 1000 disposed on the vehicle body 2000, wherein the power supply system 1000 is configured to provide electric energy for the vehicle body 2000 to drive the vehicle to operate.
Turning back to fig. 1 and 2, referring to fig. 12, the chassis 2001 of the vehicle body 2000 has a series of locking protrusions 20011, wherein the power battery 100 further includes an explosion-proof unit 90, the explosion-proof unit 90 includes four extension legs 91, the four extension legs 91 integrally extend downward from four corners of the cover 12 to a position where the bottom side surface 1111 of the case main body 111 is exposed, and the free ends of the four extension legs 91 respectively have a locking hole 911, wherein the locking hole 911 of the extension leg 91 corresponds to the locking protrusion 20011 of the chassis 2001, and a latch 2002 can penetrate into and be held in the locking hole 911 of the extension leg 91 and the locking hole 20012 of the locking protrusion 20011 of the chassis 2001, such that: on the one hand, the power battery 100 can be reliably mounted on the chassis 2001, on the other hand, the locking projection 2001 of the chassis 2001 can abut against the bottom surface 1111 of the housing 111 of the power battery 100 to form a gap between the chassis 2001 and the power battery 100 to improve the heat dissipation performance of the power battery 100, and on the other hand, the latch 2002 can reliably pull the cover 12 toward the chassis 2001 through the extension leg 91, so that when the power battery 100 is abnormally operated and the battery cell 20 explodes, explosion fragments can be prevented from rushing out of the housing unit 10 as much as possible to reduce the risk.
In order to further reduce the risk of explosion of the battery cells 20 due to abnormal operation of the power battery 100, on one hand, the housing 11 and the cover 12 of the housing unit 10 and the extension leg 91 of the explosion-proof unit 90 are made of a strong metal material, and on the other hand, the number of the battery cells 20 of the power battery 100 is kept within a reasonable range, for example, in the specific example of the power battery 100 shown in fig. 1 to 7, the number of the battery cells 20 may be 7.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (11)
1. Power battery with temperature sensor, characterized in that includes:
an inlet flow control valve;
an outlet flow control valve;
at least two battery cells;
a circuit board, wherein said circuit board is connected to at least one of said battery cells;
at least one temperature sensor, wherein the temperature sensor is connected to the circuit board; and
a housing unit, wherein the housing unit further comprises:
a cover, wherein the circuit board and the temperature sensor are respectively arranged on the cover; and
a case, wherein the case includes a case main body and at least one partition plate, and the case has at least two battery mounting cavities, a fluid distribution channel, a fluid convergence channel, a plurality of branch channels, an inlet mounting hole, and an outlet mounting hole, the partition plate is located inside the case main body to form the battery mounting cavities between the case main body and the partition plate, the fluid distribution channel and the fluid convergence channel are located at opposite ends of the battery mounting cavities, respectively, and an extending direction of the fluid distribution channel and an extending direction of the battery mounting cavities are perpendicular to each other, the extending directions of the fluid convergence channel and the extending direction of the battery mounting cavities are perpendicular to each other, the branch channels are communicated with the fluid distribution channel and the fluid convergence channel, respectively, and at least one of the branch channels is formed at the partition plate, wherein the inlet control valve is mounted to the inlet mounting hole of the case, the outlet control valve is mounted to the outlet mounting hole of the case, wherein the battery unit is mounted to the battery mounting cavities of the case, wherein the cover body is disposed to the case so that the battery, the battery unit and the temperature sensor and the cover body are held in the temperature sensor space, and the cover body, and the fluid distribution channel or the cover body are held by the cover body, and the fluid convergence channel.
2. The power cell with the temperature sensor according to claim 1, wherein the power cell includes two of the temperature sensors, one of the temperature sensors being suspended from the fluid distribution channel of the housing, the other of the temperature sensors being suspended from the fluid convergence channel of the housing.
3. The power cell with temperature sensor of claim 2, wherein the temperature sensor suspended from the fluid distribution channel of the housing is adjacent the inlet flow control valve and the temperature sensor suspended from the fluid convergence channel of the housing is adjacent the outlet flow control valve.
4. The power battery with the temperature sensor according to any one of claims 1 to 3, wherein the inlet mounting hole and the outlet mounting hole of the housing are formed at the same end of the case main body.
5. The power battery with the temperature sensor according to any one of claims 1 to 3, wherein the inlet mounting hole and the outlet mounting hole of the housing are formed at opposite ends of the case main body.
6. The power battery with the temperature sensor according to any one of claims 1 to 3, wherein the power battery further comprises a buffer unit disposed between the case main body and the battery cell.
7. The power battery with a temperature sensor according to any one of claims 1 to 3, wherein the cover has two conductive holes, wherein the power battery further comprises two conductive units, each of the conductive units comprises an extended conductor and a conductive protrusion disposed on the extended conductor, wherein one electrode of each of the battery cells is connected to the extended conductor of one of the conductive units, and the other electrode of each of the battery cells is connected to the extended conductor of the other of the battery cells, and wherein the conductive protrusion of each of the conductive units extends to and protrudes from the top surface of the cover through each of the conductive holes of the cover.
8. The power cell with the temperature sensor according to any one of claims 1 to 3, wherein the power cell further comprises an explosion-proof unit, wherein the explosion-proof unit comprises four extension legs integrally extending downward from four corners of the lid body to positions where the bottom side surface of the case main body is exposed, respectively, and free ends of the four extension legs have a locking hole, respectively.
9. The power cell with the temperature sensor according to any one of claims 1 to 3, wherein the structure of the inlet flow control valve and the structure of the outlet flow control valve are identical.
10. A power supply system, comprising:
a first cooling duct;
a second cooling pipe
A control section; and
the plurality of power cells according to any one of claims 1 to 9, wherein each of the power cells is controllably connected to the control portion, and the inlet flow control valve of each of the power cells is communicated to the first cooling duct, and the outlet flow control valve of each of the power cells is communicated to the second cooling duct.
11. A vehicle, characterized by comprising:
a vehicle body; and
the power supply system according to claim 10, wherein the power supply system is provided to the vehicle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211422938.3A CN115799688A (en) | 2022-11-15 | 2022-11-15 | Power battery with temperature sensor, power supply system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211422938.3A CN115799688A (en) | 2022-11-15 | 2022-11-15 | Power battery with temperature sensor, power supply system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN115799688A true CN115799688A (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211422938.3A Pending CN115799688A (en) | 2022-11-15 | 2022-11-15 | Power battery with temperature sensor, power supply system and vehicle |
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| CN (1) | CN115799688A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118472486A (en) * | 2024-07-11 | 2024-08-09 | 蜂巢能源科技股份有限公司 | Battery pack |
| CN118472486B (en) * | 2024-07-11 | 2024-10-22 | 蜂巢能源科技股份有限公司 | Battery pack |
-
2022
- 2022-11-15 CN CN202211422938.3A patent/CN115799688A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118472486A (en) * | 2024-07-11 | 2024-08-09 | 蜂巢能源科技股份有限公司 | Battery pack |
| CN118472486B (en) * | 2024-07-11 | 2024-10-22 | 蜂巢能源科技股份有限公司 | Battery pack |
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