CN212571125U - Power battery pack heat dissipation management system - Google Patents
Power battery pack heat dissipation management system Download PDFInfo
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- CN212571125U CN212571125U CN202021494183.4U CN202021494183U CN212571125U CN 212571125 U CN212571125 U CN 212571125U CN 202021494183 U CN202021494183 U CN 202021494183U CN 212571125 U CN212571125 U CN 212571125U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a power battery group heat dissipation management system, including first battery box, the second battery box, the heat dissipation bottom plate, cooling circulation mechanism, a plurality of first heat pipes and a plurality of second heat pipes, first battery box is placed on the heat dissipation bottom plate, second battery box is located the top of first battery box and has the interval with first battery box, first heat pipe one end is connected on the heat dissipation bottom plate, the other end passes first battery box and is located second battery box, still be provided with a plurality of cooling plates between first battery box and the second battery box, first battery box and second battery box are connected on the cooling plate through the second heat pipe respectively, cooling circulation mechanism connects the both ends at the cooling plate. The utility model discloses can adopt different radiating mode automatically when battery temperature is comparatively normal and battery temperature is too high, the heat of power battery during operation is taken away to high efficiency and safe energy-conservation, and radiating mode accords with practical application more, prolongs entire system's actual life.
Description
Technical Field
The utility model relates to a battery heat management device field, more specifically relates to a power battery group heat dissipation management system.
Background
The power battery is a core element of the electric automobile, and the quality of the performance of the power battery directly determines the overall performance, safety, service life and the like of the electric automobile. Among various performance parameters of the power battery, the temperature is a key parameter influencing the performance of the battery, and a thermal runaway safety accident can be caused if the temperature is too high; in order to control and adjust the temperature level of the power battery and guarantee the running safety of the electric automobile, battery thermal management systems are designed in the existing battery packs of the electric automobile, so that the temperature rise of a battery pack caused by the heat accumulation of a battery box due to the generation of a large amount of heat in the charging and discharging processes of the power battery is avoided.
The current heat management and heat dissipation technology of the lithium ion battery mainly comprises an air cooling technology, a liquid cooling technology and a phase change material cooling technology. Adopt the radiating mode of forced air cooling although low cost, but it is big to be influenced by ambient temperature, radiating effect is unsatisfactory under higher temperature condition, and traditional water-cooling radiating mode adopts the battery cooling plate usually, but because the coolant liquid can not fill whole cooling plate uniformly, make each partial difference in temperature of battery cooling plate great, cooling effect is unsatisfactory, and the group battery comprises many battery cells, need use a lot of cooling plates, will cause group battery weight too big like this, it increases to consume the pump power, influence the duration of a motor vehicle, and it has the danger of weeping to paste tight battery. The phase-change material has good heat storage capacity and is widely applied to the field of heat dissipation. But have low thermal conductivity and are often required to be used in conjunction with high thermal conductivity components. The heat pipe is a heat transfer element utilizing gas-liquid phase change, and is widely applied to the field of heat dissipation because the heat transfer capacity of the heat pipe is far better than that of a metal material. The heat pipe can make up the problem of low heat conductivity coefficient of the phase change material by utilizing the advantage of high heat conductivity of the heat pipe, and can be used as a good heat transfer medium.
In the prior art, a device for dissipating heat of a battery by combining a phase-change material box body and a heat pipe is disclosed, for example, chinese patent CN207925627U discloses a heat management device for a battery module with a heat pipe coupled with a phase-change material, wherein when a thermal runaway occurs in a single or a plurality of batteries, the device can rapidly absorb a large amount of heat instantaneously generated by the batteries, and the whole battery module rapidly equalizes temperature and transfers the heat to the outside, thereby preventing the batteries around the battery module from generating the thermal runaway. However, the overall structure of the device for battery heat dissipation by combining the variable material box body and the heat pipe in the prior art is still compact, when the number of batteries is large, the heat dissipation effect is not rapid enough, and when the temperature of the batteries is normal, the heat dissipation mode is the same as that when the temperature of the batteries is too high, the heat generated during the operation of the power battery cannot be taken away efficiently, safely and in an energy-saving manner, and the actual service life of the whole device can be shortened.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome above-mentioned background art overall structure still comparatively inseparable, when battery quantity is more, the radiating effect is rapid inadequately to the radiating mode when battery temperature is comparatively normal when with battery temperature too high is the same, and the heat of power battery during operation can't be taken away to high efficiency and safe energy-conservation, makes the problem that the actual life of whole device can subtract the weak point, provides a power battery group heat dissipation management system. The utility model discloses the radiating effect is rapid to adopt different radiating mode when battery temperature is comparatively normal when with battery temperature too high, the heat of power battery during operation is taken away to high efficiency and safe energy-conservation, prolongs entire system's actual life.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a power battery group heat dissipation management system, includes first battery box, second battery box, radiating bottom plate, cooling circulation mechanism, a plurality of first heat pipe and a plurality of second heat pipe, first battery box is placed on radiating bottom plate, the second battery box stretches into the top of first battery box and with there is the interval in first battery box, first heat pipe one end is connected radiating bottom plate is last, the other end passes first battery box and stretch into in the second battery box, still be provided with a plurality of cooling plates between first battery box and the second battery box, first battery box and second battery box pass through respectively the second heat pipe is connected on the cooling plate, cooling circulation mechanism connects the both ends of cooling plate.
Furthermore, the cooling circulation mechanism comprises a cooling water tank, a water pump, a controller, a first water supply disperser and a second water supply disperser, one end of each cooling plate is connected to one end of the first water supply disperser, the other end of the first water supply disperser is connected to one end of the cooling water tank, the other end of the cooling water tank is connected to one end of the water pump, the other end of the water pump is connected to one end of the second water supply disperser, the other end of the second water supply disperser is respectively connected to the other end of the cooling plate, and the controller is in control connection with the water pump; and temperature sensors are arranged in the first battery box body and the second battery box body, and the temperature sensors are connected with the controller.
Furthermore, the number of the cooling plates is two, the two cooling plates are parallel to each other and are located in the same plane, and the plane where the two cooling plates are located is parallel to the upper end face of the first battery box body.
Furthermore, heat conduction insulation plates are arranged on the upper end face and the lower end face of the first battery box body and the upper end face and the lower end face of the second battery box body.
Furthermore, the heat dissipation bottom plate comprises a rib plate and a first heat pipe clamping plate, a plurality of air channels are arranged on one end face of the rib plate, the first heat pipe clamping plate is detachably connected to the other end face of the rib plate, and one end of the first heat pipe is clamped between the first heat pipe clamping plate and the rib plate.
Further, the floor with be equipped with a plurality of ribs on the terminal surface that the wind channel is back to back, be equipped with on the rib with first heat pipe matches first semi-cylindrical recess, first heat pipe splint are close to be equipped with on the terminal surface of rib with the second semi-cylindrical recess that first semi-cylindrical recess matches, first heat pipe centre gripping is in between first semi-cylindrical recess and the second semi-cylindrical recess rather than corresponding.
Furthermore, the cooling plate comprises a hollow middle channel plate and second heat pipe clamping plates positioned on two opposite sides of the middle channel plate, the second heat pipe clamping plates are detachably connected to two opposite side surfaces of the middle channel plate respectively, the second heat pipes are clamped between the second heat pipe clamping plates and the middle channel plate, two ends of the middle channel plate are provided with connecting ports communicated with an internal channel of the middle channel plate respectively, and the cooling circulation mechanism is connected with the connecting ports through water pipes.
Furthermore, third semi-cylindrical grooves matched with the second heat pipes are formed in two opposite side surfaces of the middle channel plate, and fourth semi-cylindrical grooves matched with the third semi-cylindrical grooves are formed in one side, close to the middle channel plate, of the second heat pipe clamping plate; the second heat pipe is clamped between the third semi-cylindrical groove and a fourth semi-cylindrical groove corresponding to the third semi-cylindrical groove.
Preferably, the first heat pipe is U-shaped, two ends of the open end of the first heat pipe penetrate through the first battery box body and extend into the second battery box body, and one end of the first heat pipe opposite to the open end of the first heat pipe is clamped between the first heat pipe clamping plate and the rib plate.
Preferably, the second heat pipe is also U-shaped, the open end of the second heat pipe extends into the first battery box or the second battery box, and the end of the second heat pipe opposite to the open end is clamped between the second heat pipe clamp plate and the cooling plate.
Compared with the prior art, the beneficial effects are:
1. the utility model discloses there are two kinds of different radiating modes: the first is a natural wind heat dissipation mode, and the second is a cooling plate liquid cooling heat dissipation mode; different heat dissipation modes can be automatically adopted when the temperature of the battery is normal and the temperature of the battery is too high, the heat generated when the power battery works is taken away efficiently, safely and energy-saving, the heat dissipation mode is more in line with practical application, and the actual service life of the whole system is prolonged.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the present invention when the cooling circulation mechanism is not connected.
Fig. 3 is a schematic structural diagram of the middle heat dissipation bottom plate of the present invention.
Fig. 4 is a schematic structural diagram of the cooling plate of the present invention.
Fig. 5 is a schematic structural diagram of the first heat pipe of the present invention.
Fig. 6 is a schematic structural diagram of a second heat pipe according to the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
As shown in fig. 1 and fig. 2, a heat dissipation management system for a power battery pack comprises a first battery box 1, a second battery box 2, a heat dissipation bottom plate 4, a cooling circulation mechanism, a plurality of first heat pipes 5 and a plurality of second heat pipes 6, the first battery box body 1 is placed on the heat dissipation bottom plate 4, the second battery box body 2 extends into the upper part of the first battery box body 1 and has a distance with the first battery box body 1, one end of the first heat pipe 5 is connected to the heat dissipation bottom plate 4, the other end of the first heat pipe penetrates through the first battery box body 1 and extends into the second battery box body 2, still be provided with a plurality of cooling plates 3 between first battery box 1 and the second battery box 2, first battery box 1 and second battery box 2 are respectively through second heat pipe 6 is connected on cooling plate 3, cooling cycle mechanism connects the both ends of cooling plate 3. The number of the cooling plates 3 is two, the two cooling plates 3 are parallel to each other and are positioned in the same plane, and the plane where the two cooling plates 3 are positioned is parallel to the upper end face of the first battery box body 1; and heat conduction insulating plates 12 are arranged on the upper end face and the lower end face of the first battery box body 1 and the upper end face and the lower end face of the second battery box body 2.
In this embodiment, the cooling circulation mechanism includes a cooling water tank 8, a water pump 9, a controller 10, a first water supply disperser 7, and a second water supply disperser 11, one end of each cooling plate 3 is connected to one end of the first water supply disperser 7, the other end of the first water supply disperser 7 is connected to one end of the cooling water tank 8, the other end of the cooling water tank 8 is connected to one end of the water pump 9, the other end of the water pump 9 is connected to one end of the second water supply disperser 11, and the other ends of the second water supply dispersers 11 are respectively connected to the other ends of the cooling plates 3; the controller 10 is in control connection with the water pump 9; and temperature sensors are arranged in the first battery box body 1 and the second battery box body 2, and are connected with the controller 10.
As shown in fig. 3 and 5, the heat dissipation bottom plate 4 includes a rib plate 41 and a first heat pipe clamp plate 44, one end surface of the rib plate 41 is provided with a plurality of air ducts 42, the first heat pipe clamp plate 44 is detachably connected to the other end surface of the rib plate 41, and one end of the first heat pipe 5 is clamped between the first heat pipe clamp plate 44 and the rib plate 41; a plurality of ribs 43 are arranged on one end face of the rib plate 41 opposite to the air duct 42, a first semi-cylindrical groove matched with the first heat pipe 5 is arranged on each rib 43, a second semi-cylindrical groove matched with the first semi-cylindrical groove is arranged on one end face of the first heat pipe clamping plate 44 close to the rib 43, and the first heat pipe 5 is clamped between the first semi-cylindrical groove and the second semi-cylindrical groove corresponding to the first semi-cylindrical groove; the first heat pipe 5 is U-shaped, two ends of an opening end of the first heat pipe 5 penetrate through the first battery box 1 and extend into the second battery box 2, and one end of the first heat pipe 5 opposite to the opening end is clamped between the first heat pipe clamping plate 44 and the rib plate 41.
As shown in fig. 4 and 6, the cooling plate 3 includes a hollow middle channel plate 31 and second heat pipe clamping plates 32 located at two opposite sides of the middle channel plate 31, the second heat pipe clamping plates 32 are respectively detachably connected to two opposite sides of the middle channel plate 31, the second heat pipe 6 is clamped between the second heat pipe clamping plates 32 and the middle channel plate 31, two ends of the middle channel plate 31 are respectively provided with a connection port 33 communicated with an internal channel of the middle channel plate 31, and the cooling circulation mechanism is connected to the connection ports 33 through a water pipe; third semi-cylindrical grooves matched with the second heat pipes 6 are formed in two opposite side surfaces of the middle channel plate 31, and fourth semi-cylindrical grooves matched with the third semi-cylindrical grooves are formed in one side, close to the middle channel plate 31, of the second heat pipe clamping plate 32; the second heat pipe 6 is clamped between the third semi-cylindrical groove and a fourth semi-cylindrical groove corresponding to the third semi-cylindrical groove; the second heat pipe 6 is also U-shaped, the open end of the second heat pipe 6 extends into the first battery box 1 or the second battery box 2, and the end of the second heat pipe 6 opposite to the open end thereof is clamped between the second heat pipe clamping plate 32 and the cooling plate 3.
Specifically, a first battery box body 1 and a second battery box body 2 are installed in a vehicle body through an external supporting structure, a plurality of battery grooves 20 are formed in the first battery box body 1 and the second battery box body 2 in an array mode, batteries in the battery grooves 20 are connected into a battery pack through internal conducting strips, a composite phase-change material is filled between the outer walls of the battery grooves 20, the composite phase-change material has good temperature uniformity and heat storage performance, and heat storage and heat dissipation can be carried out on the battery pack; the upper end surface and the lower end surface of the first battery box body 1 and the second battery box body 2 are respectively provided with a heat conduction insulation plate 12, so that the dangers of short circuit and the like caused by the contact of the positive electrode and the negative electrode of the battery and a conducting strip with the phase change box body are prevented; in the first battery box body 1 and the second battery box body 2, every adjacent 4 battery grooves 20 are a unit, the center of the unit is a heat dissipation center, and the heat dissipation center is provided with a heat pipe through hole 30 for installing a heat pipe; the heat pipe has excellent heat conducting capacity, can make up the problem of low heat conducting coefficient of the phase-change material, and can be used as a good heat transfer medium.
The present embodiment is divided into two cases of heat dissipation:
the first is a natural wind heat dissipation mode, the temperature sensors are divided into a plurality of groups, the temperature sensors are connected with the input end of the controller 10 and are uniformly distributed in the phase change box body, the temperature of each part of the phase change box body is monitored at a fixed point, the data collected by the temperature sensors can reflect the uniformity of the heat distribution of the phase change box body, when the temperature sensors detect that the temperatures in the first battery case 1 and the second battery case 2 are lower than the normal operation temperature, the cooling circulation mechanism cannot be started, and heat dissipation is performed in a natural wind heat dissipation manner, specifically, heat generated in the first battery box 1 and the second battery box 2 is quickly conducted to the heat dissipation bottom plate 4 through the first heat pipe 5, an evaporation end of the first heat pipe 5 is located in the first battery box 1 and the second battery box 2, a condensation end of the first heat pipe 5 is located on the heat dissipation bottom plate 4, and the first heat pipe 5 is fixedly installed on the rib plate 41 and the first heat pipe clamping plate 44 through heat-conducting silica gel coated with high viscosity and strong heat conductivity; the lower sides of the rib plates 41 on the heat dissipation bottom plate 4 are provided with parallel inward concave air channels 42, natural air in the normal running process of the automobile can flow in the air channels 42, and then heat exchange is carried out, so that heat dissipation is carried out on the first battery box body 1 and the second battery box body 2; the natural wind heat dissipation mode does not need to consume extra power, and is low in cost, energy-saving and environment-friendly.
The second is a liquid cooling heat dissipation mode of the cooling plate 3, when the temperature sensor detects that the temperature in the first battery box body 1 and the second battery box body 2 is higher than the normal working temperature, the heat needs to be dissipated rapidly, and the cooling circulation mechanism is started at the same time to perform heat dissipation simultaneously in cooperation with a natural wind heat dissipation mode; specifically, the evaporation end of the second heat pipe 6 is located in the first battery case 1 or the second battery case 2, the condensation end thereof is located on the side corresponding to the cooling plate 3, and the second heat pipe 6 is fixedly mounted on the intermediate channel plate 31 and the second heat pipe clamping plate 32 through heat-conducting silica gel coated with high viscosity and strong heat conductivity; most of heat in first battery box 1 and the second battery box 2 is conducted on cooling plate 3 through second heat pipe 6, the cooling liquid of the internal circulation of cooling plate 3, cooling liquid carries out quick heat transfer with second heat pipe 6, among the cooling circulation mechanism, a connection port 33 of cooling plate 3 is connected respectively to the dispersion end of first water supply disperser 7, collect the higher liquid of temperature after passing through the heat transfer in cooling plate 3, then flow to cooling water tank 8 through the common pipeline of the concentrated end of first water supply disperser 7, carry out circulative cooling, the liquid after the cooling is gone into the concentrated end of second water supply disperser 11 through water pump 9 pump, then flow into another connection port 33 in each cooling plate 3 respectively through the dispersion end of second water supply disperser 11, and flow through the internal passage of middle passageway board 31 and carry out the heat exchange. The heat exchange with the second heat pipe 6 is rapidly carried out through the circulating cooling, the heat exchange efficiency is high, and the temperature in the first battery box body 1 and the temperature in the second battery box body 2 can be rapidly reduced;
in this embodiment, a plurality of second heat pipes 6 or first heat pipes 5 are inserted into the heat pipe through holes 30 in the first battery case 1 and the second battery case 2, and the first heat pipes 5 and the second heat pipes 6 are arranged at intervals, so that heat can be uniformly dissipated regardless of the heat dissipation manner in that case, and the temperatures in the first battery case 1 and the second battery case 2 can be kept stable.
The embodiment automatically adopts different heat dissipation modes when the battery temperature is normal and the battery temperature is too high, the heat of the power battery during working is taken away in a high-efficiency, safe and energy-saving manner, the heat dissipation mode accords with practical application more, and the actual service life of the whole system is prolonged.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A power battery pack heat dissipation management system is characterized by comprising a first battery box body (1), a second battery box body (2), a heat dissipation bottom plate (4), a cooling circulation mechanism, a plurality of first heat pipes (5) and a plurality of second heat pipes (6), wherein the second battery box body (2), the first battery box body (1) and the heat dissipation bottom plate (4) are sequentially arranged from top to bottom, and a space is reserved between every two heat pipes; first heat pipe (5) one end is connected on radiating bottom plate (4), the other end passes first battery box (1) and stretches into in second battery box (2), still be provided with a plurality of cooling plates (3) between first battery box (1) and second battery box (2), first battery box (1) and second battery box (2) pass through respectively second heat pipe (6) are connected on cooling plate (3), cooling circulation mechanism connects the both ends of cooling plate (3).
2. The power battery pack heat dissipation management system according to claim 1, wherein the cooling circulation mechanism comprises a first water supply disperser (7), a cooling water tank (8), a water pump (9), a controller (10) and a second water supply disperser (11) which are connected in series in sequence, the first water supply disperser (7) is connected with one end of each cooling plate (3), and the other end of the second water supply disperser (11) is connected with the other end of each cooling plate (3); the cooling circulation mechanism further comprises a controller (10) in control connection with the water pump (9), temperature sensors are arranged in the first battery box body (1) and the second battery box body (2), and the temperature sensors are connected with the controller (10).
3. The power battery pack heat dissipation management system according to claim 1, wherein the number of the cooling plates (3) is two, the two cooling plates (3) are parallel to each other and located in the same plane, and the plane where the two cooling plates (3) are located is parallel to the upper end face of the first battery box body (1).
4. The power battery pack heat dissipation management system according to claim 1, wherein heat-conducting insulating plates (12) are arranged on the upper end face and the lower end face of the first battery box body (1) and the upper end face and the lower end face of the second battery box body (2).
5. The power battery pack heat dissipation management system according to claim 1, wherein the heat dissipation base plate (4) comprises a rib plate (41) and a first heat pipe clamp plate (44), one end surface of the rib plate (41) is provided with a plurality of air ducts (42), the first heat pipe clamp plate (44) is detachably connected to the other end surface of the rib plate (41), and one end of the first heat pipe (5) is clamped between the first heat pipe clamp plate (44) and the rib plate (41).
6. The power battery pack heat dissipation management system according to claim 5, wherein a plurality of ribs (43) are arranged on one end face of the rib plate (41) opposite to the air duct (42), a first semi-cylindrical groove matched with the first heat pipe (5) is arranged on each rib (43), a second semi-cylindrical groove matched with the first semi-cylindrical groove is arranged on one end face, close to the rib (43), of the first heat pipe clamping plate (44), and the first heat pipe (5) is clamped between the first semi-cylindrical groove and the corresponding second semi-cylindrical groove.
7. The power battery pack heat dissipation management system according to claim 1, wherein the cooling plate (3) comprises a hollow middle channel plate (31) and second heat pipe clamping plates (32) located at two opposite sides of the middle channel plate (31), the second heat pipe clamping plates (32) are detachably connected to two opposite sides of the middle channel plate (31), the second heat pipes (6) are clamped between the second heat pipe clamping plates (32) and the middle channel plate (31), two ends of the middle channel plate (31) are respectively provided with a connection port (33) communicated with an internal channel of the middle channel plate (31), and the cooling circulation mechanism is connected with the connection ports (33) through water pipes.
8. The power battery pack heat dissipation management system according to claim 7, wherein each of two opposite sides of the middle channel plate (31) is provided with a third semi-cylindrical groove matched with the second heat pipe (6), and one side of the second heat pipe clamping plate (32) close to the middle channel plate (31) is provided with a fourth semi-cylindrical groove matched with the third semi-cylindrical groove; the second heat pipe (6) is clamped between the third semi-cylindrical groove and a fourth semi-cylindrical groove corresponding to the third semi-cylindrical groove.
9. The power battery pack heat dissipation management system according to claim 5 or 6, wherein the first heat pipe (5) is U-shaped, two ends of an open end of the first heat pipe (5) penetrate through the first battery box (1) and extend into the second battery box (2), and one end of the first heat pipe (5) opposite to the open end is clamped between the first heat pipe clamping plate (44) and the rib plate (41).
10. The power battery pack heat dissipation management system according to claim 7 or 8, wherein the second heat pipe (6) is also U-shaped, an open end of the second heat pipe (6) extends into the first battery case (1) or the second battery case (2), and an end of the second heat pipe (6) opposite to the open end thereof is clamped between the second heat pipe clamp plate (32) and the cooling plate (3).
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| CN202021494183.4U CN212571125U (en) | 2020-07-24 | 2020-07-24 | Power battery pack heat dissipation management system |
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| CN111864302A (en) * | 2020-07-24 | 2020-10-30 | 广东工业大学 | Power battery pack heat dissipation management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111864302A (en) * | 2020-07-24 | 2020-10-30 | 广东工业大学 | Power battery pack heat dissipation management system |
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