CN220368002U - Battery cooling system - Google Patents
Battery cooling system Download PDFInfo
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- CN220368002U CN220368002U CN202321938950.XU CN202321938950U CN220368002U CN 220368002 U CN220368002 U CN 220368002U CN 202321938950 U CN202321938950 U CN 202321938950U CN 220368002 U CN220368002 U CN 220368002U
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- expansion tank
- open expansion
- water
- liquid level
- cooler
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- 238000001816 cooling Methods 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 212
- 239000007788 liquid Substances 0.000 claims abstract description 141
- 239000000110 cooling liquid Substances 0.000 claims abstract description 105
- 238000009434 installation Methods 0.000 claims abstract description 17
- 239000002826 coolant Substances 0.000 claims description 42
- 238000001514 detection method Methods 0.000 claims description 28
- 239000003507 refrigerant Substances 0.000 claims description 21
- 230000001502 supplementing effect Effects 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 17
- 238000002637 fluid replacement therapy Methods 0.000 claims description 13
- 239000012809 cooling fluid Substances 0.000 claims description 7
- 238000001802 infusion Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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 utility model relates to the technical field of battery cooling, in particular to a storage battery cooling system, which comprises a storage battery unit and a cooling unit, wherein the storage battery unit comprises a battery module and a cooler connected with the battery module; the cooling unit comprises a heat exchange device and a cooling liquid supply device; the water channel of the cooling liquid supply device is configured to flow through the heat exchange device so as to cool the cooling liquid in the water channel, and the water channel is connected with the cooler so as to enable the cooling liquid to circularly flow in the water channel and the cooler; the cooling liquid supply device comprises an open expansion tank and a water pump, wherein the open expansion tank and the water pump are arranged on a water path, and the open expansion tank is connected with a water outlet of the water pump; the installation position of the open expansion tank is lower than that of the cooler, and the position water head of the liquid level of the open expansion tank is lower than that of the cooler. The storage battery cooling system can solve the problem of leakage of cooling liquid caused by pipe breakage, and improve the problem that a battery module is easy to short-circuit and damage when meeting water.
Description
Technical Field
The utility model relates to the technical field of battery cooling, in particular to a storage battery cooling system.
Background
The related art generally adopts a water cooling mode when cooling the storage battery; specifically, the cooling liquid such as water and glycol flows through the battery module to take away the heat generated by the battery module, so as to achieve the cooling effect.
However, in the water-cooling system for the storage battery provided by the related art, the leakage of the cooling liquid is easily caused by the damage of the piping of the cooling liquid, so that the problems of short circuit and damage caused by water contact of the battery module are easily caused, and the safety is reduced.
Disclosure of Invention
The utility model solves the problem of how to solve the problem of leakage of cooling liquid caused by pipe breakage, improve the problem of easy water short circuit and damage of the battery module, and improve the safety of the battery module.
In order to solve the above problems, the present utility model provides a battery cooling system comprising:
the storage battery unit comprises a battery module and a cooler, wherein the cooler is connected with the battery module and is used for enabling cooling fluid to flow through the battery module;
the cooling unit comprises a heat exchange device and a cooling liquid supply device; the water channel of the cooling liquid supply device is configured to flow through the heat exchange device so as to cool the cooling liquid in the water channel through the heat exchange device, and the water channel is also connected with the cooler so as to enable the cooling liquid to circularly flow in the water channel and the cooler; wherein,
the cooling liquid supply device comprises an open expansion tank and a water pump, wherein the open expansion tank and the water pump are arranged on a water path, and the open expansion tank is connected with a water outlet of the water pump; the installation position of the open expansion tank is lower than the installation position of the cooler, and the position water head of the liquid surface of the open expansion tank is configured to be lower than the position water head of the cooler.
The open expansion tank is connected with the water outlet of the water pump, so that the water head at the liquid level of the open expansion tank is equal to the pressure water head at the joint of the open expansion tank and the water pump.
The pressure water head of the water inlet of the cooler is equal to the pressure water head of the connection part of the open expansion tank and the water pump minus the position water head of the cooler, wherein the pressure water head of the connection part of the open expansion tank and the water pump minus the position water head of the cooler is equal to the liquid level position water head of the open expansion tank minus the position water head of the cooler; the installation position of the open expansion tank is lower than the installation position of the cooler, and the position water head of the liquid level of the open expansion tank is configured to be lower than the position water head of the cooler, so that the pressure water head of the water inlet of the cooler is negative, namely, the water head at the water inlet of the cooler is smaller than the atmospheric pressure, and negative pressure is formed.
Similarly, the pressure water head of the water outlet of the cooler needs to be subtracted by the pressure water head of the water inlet of the cooler, and the pressure water head of the water outlet of the cooler is necessarily negative because the pressure water head of the water inlet of the cooler is already negative and at least the loss water head of the cooler is also subtracted, namely, the water head of the water outlet of the cooler is smaller than the atmosphere, so that negative pressure is formed.
In this way, the water heads of the water inlet and the water outlet of the cooler connected with the battery module are smaller than the atmospheric pressure, so that negative pressure is formed; when the problem of pipe breakage occurs in the cooler, under the action of negative pressure, air enters the damaged position, so that the leakage of cooling liquid in the cooler can be prevented, the problem that the cooling liquid is exposed due to the pipe breakage of the cooler is further improved, the problem that the battery module is easy to be short-circuited and damaged when meeting water due to the leakage of the cooling liquid is further improved, and the safety is improved.
In an alternative embodiment, the storage battery unit comprises at least two battery modules and at least two coolers, wherein the at least two battery modules are sequentially arranged along the vertical direction, the at least two coolers are connected with the water channel, and the at least two coolers are connected with the at least two battery modules in a one-to-one correspondence manner;
the installation position of the open expansion tank is lower than the installation position of the cooler located at the lowest position, and the position water head of the liquid surface of the open expansion tank is configured to be lower than the position water head of the cooler located at the lowest position.
The water heads of the water inlets and the water outlets of the coolers positioned at the lowest part are smaller than the air pressure, and the water heads of the water inlets and the water outlets of the other coolers are also smaller than the atmospheric pressure, so that negative pressure is formed; when the problem of pipe breakage occurs in the cooler, under the action of negative pressure, air enters the damaged position, so that the leakage of cooling liquid in the cooler can be prevented, the problem that the cooling liquid is exposed due to the pipe breakage of the cooler is solved, the problem that the battery module is easy to be short-circuited and damaged when meeting water due to the leakage of the cooling liquid is solved, and the safety is improved.
In an alternative embodiment, the battery cell further comprises a manifold; the bottom of each battery module is connected with a cooler, and the top of the battery module positioned at the uppermost part is also connected with a cooler; the water outlets of the coolers are connected with the collecting pipe, and the water path of the cooling liquid supply device is connected with the top end of the collecting pipe.
So set up, can ensure that the water head of each cooler's water inlet and delivery port is less than the atmospheric pressure, forms the negative pressure, when the cooler took place the piping problem of breaking, under the effect of negative pressure, broken position entering air can hinder the coolant liquid in the cooler to leak outward, and then improves the cooler and takes place the piping problem that breaks and lead to the coolant liquid to expose, improves the battery module and easily meets the problem of water short circuit, damage because of coolant liquid leaks outward, improves the security.
In an alternative embodiment, the cooling liquid supply device further comprises an overflow mechanism connected to the open expansion tank, from which overflow mechanism the cooling liquid exceeding the upper limit overflows when the liquid level of the open expansion tank reaches the upper limit.
The overflow mechanism is configured to control the liquid level of the open expansion tank to be below an upper limit, namely, the liquid level of the open expansion tank can be timely reduced when the liquid level exceeds the upper limit; particularly, when the problem of pipe breakage of the cooler occurs, air enters a broken place under the action of negative pressure, meanwhile, the water level of the open expansion tank exceeds the upper limit, and the cooling liquid with the same volume as that of the air entering from the broken place flows out of the open expansion tank through the overflow mechanism instead of directly overflowing from the open expansion tank, so that the problem that overflowing cooling liquid enters a storage battery cooling system can be solved, the problem that the overflowing cooling liquid causes short circuit and damage of a battery module when meeting water is further solved, and the safety is improved.
In an alternative embodiment, the overflow mechanism comprises an overflow pipe, the overflow pipe is connected with the open expansion tank, an overflow port of the overflow pipe is arranged in the open expansion tank, and when the liquid level of the open expansion tank reaches an upper limit, the cooling liquid exceeding the upper limit enters the overflow pipe through the overflow port and is output from the open expansion tank through the overflow pipe; or,
the overflow mechanism comprises a first liquid level detection piece, a first valve and an overflow pipe, the first valve is connected with the overflow pipe, the first valve is used for opening or closing an overflow port of the overflow pipe, and the overflow port is used for overflowing the cooling liquid in the open expansion tank; the first liquid level detection piece is connected with the first valve and is arranged in the open expansion tank, and the first liquid level detection piece is used for detecting the liquid level of the open expansion tank; when the first liquid level detection part detects that the liquid level of the open expansion tank reaches the upper limit, the first valve opens the overflow port; when the first liquid level detection piece detects that the liquid level of the open expansion tank is lower than the upper limit, the first valve closes the overflow port.
The overflow pipe is arranged to enable the cooling liquid exceeding the upper limit liquid level in the open expansion tank to overflow, so that the structure is simple, and the reliability of the overflow of the cooling liquid exceeding the upper limit liquid level can be ensured.
The overflow mechanism is further provided with the first liquid level detection part and the first valve, so that when the liquid level of the open expansion tank reaches the upper limit, the cooling liquid exceeding the upper limit liquid level overflows more accurately, and the problem of unexpected overflow of the cooling liquid in the open expansion tank is solved.
In an alternative embodiment, the cooling liquid supply device further comprises a liquid supplementing mechanism, and the liquid supplementing mechanism is connected with the open expansion tank; the fluid replacement mechanism is configured to replace the open expansion tank with the cooling fluid when the fluid level of the open expansion tank reaches a lower limit.
By arranging the liquid supplementing mechanism, the open expansion tank can be timely supplemented with the cooling liquid, and the cooling liquid pressure balance in the water channel of the cooling liquid supply device is reliably maintained by the open expansion tank, so that the cooling liquid in the water channel of the cooling liquid supply device is reliably utilized to cool the battery module.
In an alternative embodiment, the fluid infusion mechanism comprises a second liquid level detection piece, a second valve and a fluid infusion tube, wherein the second valve is connected with the fluid infusion tube and is used for opening or closing a fluid infusion port of the fluid infusion tube, and the fluid infusion port is used for supplementing cooling liquid to the open expansion tank; the second liquid level detection piece is connected with the second valve and is arranged in the open expansion tank, and the second liquid level detection piece is used for detecting the liquid level in the open expansion tank;
when the second liquid level detection part detects that the liquid level of the open expansion tank reaches the lower limit, the second valve opens the liquid supplementing port;
when the second liquid level detection part detects that the liquid level of the open expansion tank is greater than the lower limit, the second valve closes the liquid supplementing port.
By the arrangement, the supplement of the cooling liquid can be efficiently, accurately and automatically realized according to the liquid level condition of the cooling liquid in the open expansion tank, and then the cooling of the battery module can be reliably realized.
In an alternative embodiment, the second liquid level detecting member comprises a floating ball and a connecting rod, the floating ball is connected with the second valve through the connecting rod, the floating ball is arranged in the open expansion tank, and the floating ball can float on the cooling liquid contained in the open expansion tank; when the liquid level of the open expansion tank reaches the lower limit, the floating ball descends along with the liquid level, and the connecting rod is driven to drive the second valve to open the liquid supplementing port; or,
the second liquid level detection part comprises a water level sensor which is arranged in the open expansion tank and is electrically connected with the second valve; when the liquid level of the open expansion tank reaches the lower limit, the water level sensor sends a liquid supplementing signal to the second valve so that the second valve opens the liquid supplementing port.
The second liquid level detection part comprising the floating ball and the connecting rod is simple in structure, convenient to assemble and capable of timely achieving liquid supplementing.
The water level sensor is used as a second liquid level detection part, so that the detection accuracy can be improved, and the accuracy of liquid supplementing is further improved.
In an alternative embodiment, the heat exchange device comprises a first heat exchanger, and the water path of the cooling liquid supply device is configured to flow through the first heat exchanger and is connected with the water inlet of the water pump after flowing through the first heat exchanger.
By the arrangement, the cooling liquid in the water channel of the cooling liquid supply device can be reliably cooled by the first heat exchanger, and therefore the cooling liquid conveyed in the water channel of the cooling liquid supply device is ensured to have enough low temperature for cooling the battery module.
In an alternative embodiment, the heat exchange device further comprises a compressor, a heat exchange component, an expansion valve and a refrigerant circulation pipeline, wherein the compressor, the heat exchange component and the expansion valve are all connected to the refrigerant circulation pipeline, the heat exchange component is positioned at the downstream of the compressor, and the expansion valve is positioned at the downstream of the heat exchange component; the first heat exchanger is connected with the refrigerant circulation pipeline and is positioned between the expansion valve and the compressor, and the refrigerant in the refrigerant circulation pipeline can exchange heat with the cooling liquid in the water channel of the cooling liquid supply device at the first heat exchanger.
By the arrangement, the refrigerant conveyed in the refrigerant circulation pipeline and the cooling liquid conveyed in the water channel of the cooling liquid supply device can be reliably subjected to geothermal exchange at the first heat exchanger, the cooling liquid is reliably cooled, and the cooling liquid conveyed in the water channel of the cooling liquid supply device is ensured to have enough low temperature for cooling the battery module.
Drawings
Fig. 1 is a schematic diagram of a battery cooling system according to an embodiment of the present utility model.
Reference numerals illustrate:
010-battery cooling system; 100-battery cells; 110-a battery module; a 120-cooler; 130-collecting pipe; 200-cooling units; 210-a heat exchange device; 211-a first heat exchanger; 212-a compressor; 213-heat exchange assembly; 214-an expansion valve; 215-refrigerant circulation line; 216-a second heat exchanger; 217-fans; 220-a coolant supply; 230-waterway; 231-first line; 232-a second line; 233-a third line; 240-an open expansion tank; 250-water pump; 260-overflow mechanism; 270-a fluid replacement mechanism; 271-a second level detecting member; 272-a second valve; 273-fluid infusion tube.
Detailed Description
The system for carrying out the water cooling of the storage battery, which is provided by the related technology, is easy to cause the leakage of the cooling liquid due to the damage of the piping of the cooling liquid, so that the problems of short circuit and damage caused by water meeting of the battery module are easy to occur, and the safety is reduced.
The embodiment provides a battery cooling system, which can solve the problem of leakage of cooling liquid caused by pipe breakage, improve the problem that a battery module is easy to be short-circuited and damaged when meeting water, and improve the safety of the battery module.
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Referring to fig. 1, the present embodiment provides a battery cooling system 010, which includes a battery unit 100 and a cooling unit 200, wherein the cooling unit 200 is used for cooling the battery unit 100.
The battery unit 100 includes a battery module 110 and a cooler 120, where the cooler 120 is connected with the battery module 110, and is used to make a coolant flow through the battery module 110, i.e. the coolant can be used to take away the heat generated by the battery module 110, so as to cool the battery module 110, and the coolant includes but is not limited to water or glycol.
The cooling unit 200 includes a heat exchange device 210 and a cooling liquid supply device 220, and a water path 230 of the cooling liquid supply device 220 is configured to flow through the heat exchange device 210 to exchange heat through the heat exchange device 210 to cool the cooling liquid in the water path 230, and the water path 230 is further connected to the cooler 120 to circulate the cooling liquid in the water path 230 and the cooler 120. The cooling liquid in the water path 230 after heat exchange and cooling by the heat exchange device 210 can enter the cooler 120 so as to take away the heat generated by the battery module 110 by using the cooling liquid entering the cooler 120, so that cooling of the battery module 110 is realized, the cooling liquid with the temperature rising after heat exchange with the battery module 110 flows back to the water path 230 from the cooler 120, flows through the heat exchange device 210 again in the water path 230, and exchanges heat and cools again when flowing through the heat exchange device 210; in this way, the coolant circulating through the water passage 230 and the cooler 120 is always a low-temperature liquid capable of cooling the battery module 110 when entering the cooler 120, and thus, the battery module 110 can be reliably cooled.
Further, the water path 230 of the cooling liquid supply device 220 includes a first pipeline 231, a second pipeline 232 and a third pipeline 233 which are sequentially connected and communicated, one end of the first pipeline 231 far away from the second pipeline 232 is connected with the water outlet of the cooler 120, one end of the third pipeline 233 far away from the second pipeline 232 is connected with the water inlet of the cooler 120, and the second pipeline 232 is arranged on the heat exchange device 210. In this way, the cooling liquid in the second pipeline 232 enters the third pipeline 233 after being cooled by the heat exchange device 210, and enters the cooler 120 through the third pipeline 233, so that the cooling liquid entering the cooler 120 can be used to cool the battery module 110; meanwhile, the cooling liquid with increased temperature after heat exchange with the battery module 110 in the cooler 120 flows into the first pipeline 231 and flows back to the second pipeline 232 through the first pipeline 231, so that heat exchange and cooling with the heat exchange device 210 can be realized in the second pipeline 232, the recycling of the cooling liquid can be realized, and the reliable liquid cooling of the battery module 110 is ensured.
The coolant supply device 220 includes an open expansion tank 240 and a water pump 250, and the open expansion tank 240 and the water pump 250 are both disposed on the waterway 230, specifically, the water pump 250 and the open expansion tank 240 are both disposed on the third pipeline 233; the open expansion tank 240 is connected with the water outlet of the water pump 250, i.e. the open expansion tank 240 is connected with the water outlet of the water pump 250 through the third pipeline 233; the heat exchange device 210 includes a first heat exchanger 211, a water path 230 of the cooling water supply device flows through the first heat exchanger 211 and is connected to a water inlet of the water pump 250 after flowing through the first heat exchanger 211, specifically, a second pipe 232 is connected to the first heat exchanger 211, and the water inlet of the water pump 250 is located downstream of the second pipe 232, that is, the water inlet of the water pump 250 is connected to the second pipe 232 through a third pipe 233. In this way, after the cooling liquid flows through the second pipeline 232 and exchanges heat and cools through the first heat exchanger 211, the cooling liquid flows through the water pump 250 to reliably flow to the cooler 120, so as to ensure that the cooling liquid in the cooler 120 can be reliably cooled and cooled by the battery module 110.
Further, the heat exchange device 210 further includes a compressor 212, a heat exchange assembly 213, an expansion valve 214, and a refrigerant circulation pipeline 215, wherein the compressor 212, the heat exchange assembly 213, and the expansion valve 214 are all connected to the refrigerant circulation pipeline 215, the heat exchange assembly 213 is located at the downstream of the compressor 212, and the expansion valve 214 is located at the downstream of the heat exchange assembly 213; the first heat exchanger 211 is connected to the refrigerant circulation line 215 and is located between the expansion valve 214 and the compressor 212, and the refrigerant in the refrigerant circulation line 215 can exchange heat with the cooling liquid in the water path 230 at the first heat exchanger 211, i.e. the refrigerant in the refrigerant circulation line 215 can exchange heat with the cooling liquid in the second line 232 at the first heat exchanger 211, so as to cool the cooling liquid in the second line 232. By this arrangement, the coolant supplied through the coolant circulation pipe 215 and the coolant supplied through the water path 230 of the coolant supply device 220 can be reliably heat-exchanged at the first heat exchanger 211, and the coolant can be reliably cooled, so that it is ensured that the coolant supplied through the water path 230 of the coolant supply device 220 has a sufficiently low temperature for cooling the battery module 110.
Still further, the heat exchange assembly 213 includes a second heat exchanger 216 and a fan 217, the second heat exchanger 216 is disposed in the refrigerant circulation line 215 and downstream of the compressor 212; the fan 217 is disposed at a side of the second heat exchanger 216, and is configured to blow air to the second heat exchanger 216 to cool the second heat exchanger.
It should be noted that, the compressor 212, the second heat exchanger 216, the fan 217 and the expansion valve 214 of the heat exchange device 210 function similarly to those of the related art, and the heat exchange device 210 may implement a refrigeration cycle of compression, condensation (heat release), expansion, and evaporation (heat absorption).
In order to solve the problem of leakage of the coolant due to pipe breakage, the battery module 110 is easily shorted and damaged by water, and the safety of the battery module 110 is improved. In this embodiment, the open expansion tank 240 is connected to the water outlet of the water pump 250; the installation position of the open expansion tank 240 is lower than the installation position of the cooler 120, and the position water head of the liquid surface of the open expansion tank 240 is configured to be lower than the position water head of the cooler 120.
The open expansion tank 240 is connected to the water outlet of the water pump 250 such that the liquid level position head of the open expansion tank 240 is equal to the pressure head at the junction of the open expansion tank 240 and the water pump 250.
The pressure water head of the water inlet of the cooler 120 is equal to the pressure water head of the connection part of the open expansion tank 240 and the water pump 250 minus the position water head of the cooler 120, wherein the pressure water head of the connection part of the open expansion tank 240 and the water pump 250 minus the position water head of the cooler 120 is equal to the liquid level position water head of the open expansion tank 240 minus the position water head of the cooler 120; the installation position of the open expansion tank 240 is set lower than the installation position of the cooler 120, and the position water head of the liquid level of the open expansion tank 240 is configured to be lower than the position water head of the cooler 120, so that the pressure water head of the water inlet of the cooler 120 is negative, that is, the water head at the water inlet of the cooler 120 is smaller than the atmospheric pressure, and negative pressure is formed.
Similarly, the pressure head of the water outlet of the cooler 120 needs to be subtracted from the pressure head of the water inlet of the cooler 120 by the loss head of the cooler 120, and since the pressure head of the water inlet of the cooler 120 is already negative, at least the loss head of the cooler 120 is also subtracted, the pressure head of the water outlet of the cooler 120 is necessarily also negative, that is, the water head of the water outlet of the cooler 120 is smaller than the atmosphere, so that negative pressure is formed.
In this way, the water heads of the water inlet and the water outlet of the cooler 120 connected to the battery module 110 are smaller than the atmospheric pressure, so that negative pressure is formed, when the problem of pipe breakage of the cooler 120 occurs, air enters at the breakage position under the action of the negative pressure, so that the leakage of cooling liquid in the cooler 120 can be prevented, the problem that the cooling liquid is exposed due to the pipe breakage of the cooler 120 is further improved, the problem that the battery module 110 is easily short-circuited and damaged when the cooling liquid leaks is further improved, and the safety is improved.
Further, the battery unit 100 includes at least two battery modules 110 and at least two coolers 120, the at least two battery modules 110 are sequentially arranged along the vertical direction, the at least two coolers 120 are connected with the water channel 230, and the at least two coolers 120 are connected with the at least two battery modules 110 in a one-to-one correspondence; the installation position of the open expansion tank 240 is lower than the installation position of the cooler 120 located at the lowermost position, and the position head of the liquid surface of the open expansion tank 240 is configured to be lower than the position head of the cooler 120 located at the lowermost position. The water heads of the water inlets and the water outlets of the cooler 120 positioned at the lowest part are smaller than the air pressure, and the water heads of the water inlets and the water outlets of the other coolers 120 are also smaller than the atmospheric pressure, so that negative pressure is formed; when the problem of pipe breakage of the cooler 120 occurs, under the action of negative pressure, air enters the damaged position, so that the leakage of cooling liquid in the cooler 120 can be blocked, the problem that the cooling liquid is exposed due to the pipe breakage of the cooler 120 is further improved, the problem that the battery module 110 is easy to be short-circuited and damaged when meeting water due to the leakage of the cooling liquid is further improved, and the safety is improved.
Still further, the battery unit 100 further includes a manifold 130; the bottom of each battery module 110 is connected with a cooler 120, and the top of the battery module 110 positioned at the uppermost side is also connected with a cooler 120; the water outlets of the coolers 120 are connected with the collecting pipe 130, and the water path 230 of the cooling liquid supply device 220 is connected with the top end of the collecting pipe 130; specifically, one end of the first pipe 231, which is remote from the second pipe 232, is connected to the top end of the manifold 130, and the top end of the manifold 130 refers to the end of the cooler 120, which is connected to the top of the uppermost battery module 110, in the length extension direction of the manifold 130. So set up, can ensure that the water head of each cooler 120 water inlet and delivery port is less than atmospheric pressure, forms the negative pressure, when cooler 120 takes place the piping problem of breaking, under the effect of negative pressure, broken position entering air can hinder the coolant liquid in the cooler 120 to leak outward, and then improves cooler 120 and take place the problem that the piping breaks and lead to coolant liquid to expose, and then improves battery module 110 and easily because of coolant liquid leaks outward and takes place the problem of meeting water short circuit, damage, improves the security.
In this embodiment, the position of the liquid surface of the open expansion tank 240 has a water head h 1 The method comprises the steps of carrying out a first treatment on the surface of the The position head of the cooler 120 connected to the bottom of the lowermost battery module 110 is h 1 +h 2 The method comprises the steps of carrying out a first treatment on the surface of the The position head of the cooler 120 connected to the top of the uppermost battery module 110 is h 1 +h 2 +h 3 The method comprises the steps of carrying out a first treatment on the surface of the The loss water head of the cooler 120 is R 1 The method comprises the steps of carrying out a first treatment on the surface of the The first heat exchanger 211 has a loss head R 2 The method comprises the steps of carrying out a first treatment on the surface of the The necessary water inlet head of the water pump 250 is N, and the water head of the water pump 250 is H. The units of the water heads are m.
The energy balance of the entire coolant flow piping system of the battery cell 100 and the coolant supply device 220 is calculated, including the following calculation formula:
pressure head P at the junction of open expansion tank 240 and water outlet of water pump 250 1 ：
P 1 ＝h 1 Calculating formula (1);
the pressure water head P at the water inlet of the cooler 120 at the bottom of the lowermost battery module 110 2 ：
P 2 ＝P 1 -h 1 -h 2 ＝-h 2 Calculating formula (2);
the pressure head P of the water outlet of the cooler 120 located at the top of the uppermost battery module 110 3 ：
P 3 ＝P 2 -R 1 -h 3 ＝-h 2 -h 3 -R 1 Calculating formula (3);
water pump 250 inlet pressure head P 0 The method comprises the following steps:
P 0 ＝P 3 -R 2 +h 1 +h 2 +h 3 ＝h 1 -R 1 -R 2 calculating formula (4);
the water pump 250 water outlet pressure head P1 is:
P 1 ＝P 0 +H＝h 1 +H-R 1 -R 2 equation (5) is calculated.
From the calculation formulas (1) and (5), the water head H of the water pump 250 and the water head R lost by the cooler 120 can be known 1 And the first heat exchanger 211 loses the head R 2 The sum being equal, i.e. H=R 1 +R 2 。
While the water pump 250 is provided with a water inlet pressure head P 0 Is configured to be larger than the necessary water intake head N of the water pump 250, so that the position head of the liquid surface of the open expansion tank 240 is h1, and h can be obtained according to the calculation formula (4) 1 -R 1 -R 2 And (5) not less than N. It can be seen that the liquid level position of the open expansion tank 240 has a water head h 1 Necessary water inlet head N larger than water pump 250 and water head R lost by cooler 120 1 The first heat exchanger 211 loses the head R 2 The sum of h 1 ≥N+R 1 +R 2 。
As can be seen from the calculation formulas (2) and (3), the pressure water head P at the water inlet of the cooler 120 at the bottom of the lowermost battery module 110 2 And a pressure water head P at the water outlet of the cooler 120 at the top of the uppermost battery module 110 3 Smaller than atmospheric pressure, i.e. a negative pressure is created. Therefore, when the cooling water pipe in the battery cell 100 is broken, for example: when the cooler 120 is damaged, the liquid level in the open expansion tank 240 reaches the upper limit while the damaged position is in air, and the cooling liquid with the same volume as the inlet air is discharged from the open expansion tank 240, so that the cooling water in the storage battery unit 100 can be prevented from flowing out, the short circuit and damage of the battery module 110 when meeting water are improved, namely the damage to the storage battery unit 100 is avoided, and the safety is improved.
It should be noted that, the structure of the cooler 120 is similar to that of the battery water cooling module provided in the related art, for example: the cooling device comprises a shell and a runner arranged in the shell, when the cooling liquid flows in the runner in the shell and flows through the battery module 110, the cooling liquid in the runner and the battery module 110 can generate heat exchange so as to take away heat generated by the battery module 110, and the purpose of cooling the battery module 110 is achieved. The breakage of the pipes of the battery cell 100 may mean that the flow path of the cooler 120 is broken.
In this embodiment, the coolant supply apparatus 220 further includes an overflow mechanism 260, and the overflow mechanism 260 is connected to the open expansion tank 240, and when the liquid level of the open expansion tank 240 reaches an upper limit, coolant exceeding the upper limit overflows from the overflow mechanism 260. The overflow mechanism 260 is configured to control the liquid level of the open expansion tank 240 to be less than an upper limit, that is, to timely lower the liquid level when the liquid level of the open expansion tank 240 exceeds the upper limit; particularly, when the pipe breakage problem occurs in the cooler 120, air enters a broken place under the action of negative pressure, meanwhile, the water level of the open expansion tank 240 exceeds the upper limit, and the cooling liquid with the same volume as that of the air entering from the broken place flows out of the open expansion tank 240 through the overflow mechanism 260 instead of directly overflowing from the open expansion tank 240, so that the problem that the overflowing cooling liquid enters the storage battery cooling system 010 can be solved, the problem that the overflowing cooling liquid causes short circuit and damage to the battery module 110 when meeting water is further solved, and the safety is improved.
The overflow mechanism 260 may be configured as desired; in this embodiment, the overflow mechanism 260 includes an overflow pipe, the overflow pipe is connected with the open expansion tank 240, and an overflow port of the overflow pipe is disposed in the open expansion tank 240; when the liquid level of the open expansion tank 240 reaches the upper limit, the coolant exceeding the upper limit enters the overflow pipe through the overflow port, and is output from the open expansion tank 240 through the overflow pipe. The device is simple in structure and can ensure the reliability of overflow of the cooling liquid exceeding the upper limit liquid level.
Optionally, the overflow port of the overflow pipe is located above the upper level of the open expansion tank 240 and immediately adjacent to the upper level of the open expansion tank 240; the overflow pipe extends out of the cooling unit 200 at an end thereof away from the overflow port, so that the overflow port of the overflow pipe is disposed outside the battery cooling system 010. In this way, when the liquid level in the open expansion tank 240 reaches the upper limit, the coolant exceeding the upper limit enters the overflow pipe from the overflow port and flows out of the overflow pipe after overflowing, so that the coolant overflowing from the open expansion tank 240 through the overflow pipe is ensured not to enter the battery cooling system 010, and the overflowed coolant is ensured not to flow to the battery module 110 in the battery cooling system 010, and the problems of short circuit and damage of the battery module 110 due to water are solved.
Of course, in other embodiments, the overflow mechanism 260 includes not only an overflow tube, but also a first level detection member (not shown) and a first valve (not shown); the first valve is connected with the overflow pipe and is used for opening or closing an overflow port of the overflow pipe; the first liquid level detection piece is connected with the first valve, and is arranged on the open expansion tank 240 and used for detecting the liquid level of the open expansion tank 240; when the first liquid level detecting member detects that the liquid level of the open expansion tank 240 reaches the upper limit, the first valve opens the overflow port; when the first level detector detects that the level of the open expansion tank 240 is below the upper limit, the first valve closes the overflow port. The overflow mechanism 260 is further provided with the first liquid level detecting element and the first valve, so that when the liquid level of the open expansion tank 240 reaches the upper limit, the coolant exceeding the upper limit liquid level can be overflowed more accurately, and the problem of unexpected overflow of the coolant in the open expansion tank 240 can be solved.
It should be noted that the first liquid level detecting member may be various types of liquid level sensors, which are not particularly limited herein.
In this embodiment, the cooling liquid supply device 220 further includes a liquid supplementing mechanism 270, and the liquid supplementing mechanism 270 is connected to the open expansion tank 240; the fluid replacement mechanism 270 is configured to replace the open expansion tank 240 with the cooling fluid when the fluid level of the open expansion tank 240 reaches a lower limit. By providing the fluid-replenishing mechanism 270, the open expansion tank 240 can be timely replenished with the coolant, and the balance of the coolant pressure in the water channel 230 of the coolant supply device 220 can be reliably maintained by the open expansion tank 240, and a sufficient amount of coolant in the water channel 230 can be ensured, and the coolant in the water channel 230 can be reliably used to cool the battery module 110.
The structure of the fluid replacement mechanism 270 can be set according to the need; in this embodiment, the fluid-filling mechanism 270 includes a second fluid-level detecting member 271, a second valve 272, and a fluid-filling tube 273, wherein a fluid-filling port of the fluid-filling tube 273 is communicated with the inner cavity of the open expansion tank 240 and is used for filling cooling fluid into the open expansion tank 240; the second valve 272 is connected with the fluid replenishing pipe 273 and is used for opening or closing a fluid replenishing port of the fluid replenishing pipe 273; the second liquid level detecting member 271 is connected with the second valve 272, and the second liquid level detecting member 271 is disposed in the open expansion tank 240 and is used for detecting the liquid level in the open expansion tank 240; when the second liquid level detecting member 271 detects that the liquid level of the open expansion tank 240 reaches the lower limit, the second valve 272 opens the liquid replenishing port; when the second liquid level detecting member 271 detects that the liquid level of the open expansion tank 240 is greater than the lower limit, the second valve 272 closes the liquid replenishing port. By such arrangement, the cooling liquid can be efficiently, accurately and automatically supplemented according to the liquid level condition of the cooling liquid in the open expansion tank 240, and the cooling of the battery module 110 can be reliably realized.
Further, the second liquid level detecting member 271 includes a floating ball and a connecting rod, the floating ball is connected with the second valve 272 through the connecting rod, that is, two ends of the connecting rod are respectively connected with the floating ball and the second valve 272, and the floating ball is disposed in the open expansion tank 240, and can float on the cooling liquid contained in the open expansion tank 240; when the liquid level of the open expansion tank 240 reaches the lower limit, the floating ball descends along with the liquid level, and the connecting rod is driven to drive the second valve 272 to open the liquid supplementing port; when the liquid level of the open expansion tank 240 is higher than the lower limit, the floating ball rises along with the liquid level, and the connecting rod is driven to drive the second valve 272 to close the liquid supplementing port. The second liquid level detecting member 271 including the floating ball and the connecting rod is simple in structure, convenient to assemble, and capable of timely achieving liquid replenishing.
Of course, in other embodiments, the second liquid level detecting member 271 includes a water level sensor disposed in the open expansion tank 240 and electrically connected to the second valve 272; when the liquid level of the open expansion tank 240 reaches the lower limit, the water level sensor sends a fluid replacement signal to the second valve 272, so that the second valve 272 opens the fluid replacement port; when the liquid level of the open expansion tank 240 is above the lower limit, the water level sensor sends a closing signal to the second valve 272 to cause the second valve 272 to close the fluid refill port. The use of the water level sensor as the second liquid level detecting member 271 can improve the accuracy of detection, thereby improving the accuracy of liquid replenishment. Optionally, the battery cooling system 010 further includes a controller, the water level sensor and the second valve 272 are electrically connected through the controller, that is, the water level sensor and the second valve 272 are both electrically connected with the controller, the water level sensor can send the detected liquid level signal to the controller, and the controller sends the corresponding liquid supplementing signal or closing signal to the second valve 272 to control the liquid supplementing opening to be opened or closed.
The battery cooling system 010 of the embodiment can exchange heat by using the cooling liquid in the water channel 230 of the heat exchange device 210 and the cooling liquid supply device 220, so that the cooling liquid in the water channel 230 maintains a lower temperature, and when the cooling liquid in the water channel 230 enters the cooler 120, the cooling liquid is used to reliably carry away the heat generated by the battery module 110, thereby realizing the purpose of cooling the battery module 110.
In summary, the battery cooling system 010 of the present utility model can improve the problem of leakage of the cooling fluid due to pipe breakage, improve the problem of easy water short circuit and damage of the battery module 110, and improve the safety of the battery module 110.
Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.
Claims (10)
1. A battery cooling system, comprising:
a battery unit (100), the battery unit (100) comprising a battery module (110) and a cooler (120), the cooler (120) being connected to the battery module (110) for flowing a cooling liquid through the battery module (110);
a cooling unit (200), the cooling unit (200) comprising a heat exchange device (210) and a cooling liquid supply device (220); a water path (230) of the coolant supply device (220) is configured to flow through the heat exchange device (210) to cool the coolant in the water path (230) by the heat exchange device (210), and the water path (230) is also connected to the cooler (120) to circulate the coolant in the water path (230) and the cooler (120); wherein,
the cooling liquid supply device (220) comprises an open expansion tank (240) and a water pump (250), wherein the open expansion tank (240) and the water pump (250) are arranged on the waterway (230), and the open expansion tank (240) is connected with a water outlet of the water pump (250); the installation position of the open expansion tank (240) is lower than the installation position of the cooler (120), and the position head of the liquid surface of the open expansion tank (240) is configured to be lower than the position head of the cooler (120).
2. The battery cooling system according to claim 1, wherein the battery unit (100) includes at least two of the battery modules (110) and at least two of the coolers (120), the at least two of the battery modules (110) are arranged in sequence in the vertical direction, the at least two of the coolers (120) are each connected with the water channel (230), and the at least two of the coolers (120) are connected with the at least two of the battery modules (110) in a one-to-one correspondence;
the installation position of the open expansion tank (240) is lower than the installation position of the cooler (120) located at the lowermost position, and the position head of the liquid surface of the open expansion tank (240) is configured to be lower than the position head of the cooler (120) located at the lowermost position.
3. The battery cooling system of claim 2, wherein the battery unit (100) further comprises a manifold (130); the bottom of each battery module (110) is connected with the cooler (120), and the top of the battery module (110) at the uppermost part is also connected with the cooler (120); the water outlets of the coolers (120) are connected with the collecting pipe (130), and the waterway (230) is connected with the top end of the collecting pipe (130).
4. The battery cooling system according to claim 1, wherein the coolant supply device (220) further comprises an overflow mechanism (260), the overflow mechanism (260) being connected to the open expansion tank (240), the coolant exceeding the upper limit overflowing from the overflow mechanism (260) when the liquid level of the open expansion tank (240) reaches the upper limit.
5. The battery cooling system of claim 4, wherein the overflow mechanism (260) comprises an overflow pipe connected to the open expansion tank (240) and an overflow port of the overflow pipe is disposed within the open expansion tank (240), and when a liquid level of the open expansion tank (240) reaches an upper limit, coolant exceeding the upper limit enters the overflow pipe through the overflow port and is output from the open expansion tank (240) through the overflow pipe; or,
the overflow mechanism (260) comprises a first liquid level detection piece, a first valve and an overflow pipe, wherein the first valve is connected with the overflow pipe and is used for opening or closing an overflow port of the overflow pipe, and the overflow port is used for overflowing the cooling liquid in the open expansion tank (240); the first liquid level detection piece is connected with the first valve, and is arranged on the open expansion tank (240) and used for detecting the liquid level of the open expansion tank (240); when the first liquid level detection part detects that the liquid level of the open expansion tank (240) reaches the upper limit, the first valve opens the overflow port; when the first liquid level detection part detects that the liquid level of the open expansion tank (240) is lower than the upper limit, the first valve closes the overflow port.
6. The battery cooling system according to claim 1, wherein the cooling liquid supply device (220) further includes a liquid replenishing mechanism (270), the liquid replenishing mechanism (270) being connected with the open expansion tank (240); the fluid replenishment mechanism (270) is configured to replenish the open expansion tank (240) with cooling fluid when the fluid level of the open expansion tank (240) reaches a lower limit.
7. The battery cooling system according to claim 6, wherein the fluid replacement mechanism (270) includes a second fluid level detecting member (271), a second valve (272), and a fluid replacement pipe (273), the second valve (272) being connected to the fluid replacement pipe (273), the second valve (272) being configured to open or close a fluid replacement port of the fluid replacement pipe (273) for replenishing the cooling fluid to the open expansion tank (240); the second liquid level detection piece (271) is connected with the second valve (272), the second liquid level detection piece (271) is arranged on the open expansion tank (240), and the second liquid level detection piece (271) is used for detecting the liquid level in the open expansion tank (240);
when the second liquid level detection piece (271) detects that the liquid level of the open expansion tank (240) reaches the lower limit, the second valve (272) opens the liquid supplementing port;
when the second liquid level detection piece (271) detects that the liquid level of the open expansion tank (240) is greater than the lower limit, the second valve (272) closes the liquid supplementing port.
8. The battery cooling system according to claim 7, wherein the second liquid level detecting member (271) includes a float ball and a link rod, the float ball is connected with the second valve (272) through the link rod, and the float ball is provided in the open expansion tank (240), the float ball being floatable on the coolant contained in the open expansion tank (240); when the liquid level of the open expansion tank (240) reaches the lower limit, the floating ball descends along with the liquid level, and the connecting rod is driven to drive the second valve (272) to open the liquid supplementing port; or,
the second liquid level detection part (271) comprises a water level sensor which is arranged on the open expansion tank (240) and is electrically connected with the second valve (272); when the liquid level of the open expansion tank (240) reaches a lower limit, the water level sensor sends a fluid replacement signal to the second valve (272) so that the second valve (272) opens the fluid replacement port.
9. The battery cooling system of claim 1, wherein the heat exchange device (210) comprises a first heat exchanger (211), the water circuit (230) being configured to flow through the first heat exchanger (211) and to connect with a water inlet of the water pump (250) after flowing through the first heat exchanger (211).
10. The battery cooling system according to claim 9, wherein the heat exchange device (210) further comprises a compressor (212), a heat exchange assembly (213), an expansion valve (214) and a refrigerant circulation line (215), the compressor (212), the heat exchange assembly (213) and the expansion valve (214) being each connected to the refrigerant circulation line (215), the heat exchange assembly (213) being located downstream of the compressor (212), the expansion valve (214) being located downstream of the heat exchange assembly (213); the first heat exchanger (211) is connected with the refrigerant circulation pipeline (215) and is positioned between the expansion valve (214) and the compressor (212), and the refrigerant in the refrigerant circulation pipeline (215) can exchange heat with the cooling liquid in the waterway (230) at the first heat exchanger (211).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321938950.XU CN220368002U (en) | 2023-07-21 | 2023-07-21 | Battery cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321938950.XU CN220368002U (en) | 2023-07-21 | 2023-07-21 | Battery cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220368002U true CN220368002U (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321938950.XU Active CN220368002U (en) | 2023-07-21 | 2023-07-21 | Battery cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220368002U (en) |
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2023
- 2023-07-21 CN CN202321938950.XU patent/CN220368002U/en active Active
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