CN106876626B - Battery box - Google Patents
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- CN106876626B CN106876626B CN201710237554.7A CN201710237554A CN106876626B CN 106876626 B CN106876626 B CN 106876626B CN 201710237554 A CN201710237554 A CN 201710237554A CN 106876626 B CN106876626 B CN 106876626B
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- 239000012782 phase change material Substances 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 10
- 238000009413 insulation Methods 0.000 abstract description 10
- 238000001816 cooling Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000004321 preservation Methods 0.000 description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 230000002457 bidirectional effect Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a battery box, which comprises a shell, wherein a battery pack is arranged in the shell, the shell is a double-layer shell, a plurality of mutually communicated channels are arranged between an inner layer and an outer layer of the double-layer shell, at least two valves communicated with the channels are arranged on the shell, the circulation direction of at least one valve is inward, and the circulation direction of at least one valve is outward. The invention has the beneficial effects that the channel is connected with the valve, so that the external air and the channel form an air flow channel, and the air circulation takes away redundant heat to play a role of cooling; under the state that the valve is closed, the heat insulation effect is realized.
Description
Technical Field
The invention relates to a battery box, in particular to a battery box with heat preservation and heat dissipation functions.
Background
The lithium ion battery has the advantages of high energy density, long cycle life, high-current charge and discharge characteristics, no pollution and the like, and is widely applied to electric automobiles, robots, electric tools and other occasions needing to provide high current. However, in the actual field operation use process, as the electrochemical reaction of the electrode/electrolyte interface of lithium ions has great relevance with the temperature, under the conditions of high temperature and low temperature, the discharge output power of the lithium ion battery has great difference, thereby limiting the application of the lithium ion battery under severe conditions; on the other hand, too high or too low a temperature may have a great influence on the operational safety of the lithium battery.
When the temperature is lower than 0 ℃, the electrode reaction rate of the lithium battery can be obviously reduced, and the dischargeable current can be rapidly reduced during discharging, so that the output power is also reduced; when the lithium ion battery is charged at a low temperature, the lithium ion is easy to crystallize and separate out, and the lithium ion is punctured through the diaphragm to cause internal short circuit. After the temperature is increased, the activity of electrolyte is increased, the dischargeable capacity of the lithium battery is increased, but when the temperature is too high, the electrochemical balance of the battery is destroyed; the lithium battery is charged and discharged at high temperature, so that the battery is easily damaged due to thermal runaway, and accidents such as bulging and combustion are caused when the battery is serious, and therefore, the development of the battery box with the heat preservation and heat dissipation functions is very important.
For example, patent CN 205960072U, entitled "variable thermal resistance battery box", discloses a variable thermal resistance battery box, which comprises an upper shell and a lower shell, wherein a battery cell is arranged in the shell, an air heat insulation layer is arranged between the shell and the battery cell, a fan for driving air in the air heat insulation layer to flow is arranged in the shell, the fan drives air to flow through the surface of the battery cell and the inner wall of the shell in sequence, and heat absorbed by the inner wall of the shell is dissipated outwards through the shell. The battery box uses the fan to carry out closed circulation on the air between the battery core and the shell, and the heat is conducted out through the shell, so that the heat dissipation function is achieved, and meanwhile, the closed space can also achieve the heat preservation function.
In view of the above drawbacks, the present inventors have finally achieved the present invention through long-time studies and practices.
Disclosure of Invention
In order to solve the problems, the invention adopts the technical scheme that the battery box comprises a shell, wherein a battery pack is arranged in the shell, the shell is a double-layer shell, a plurality of mutually communicated channels are arranged between the inner layer and the outer layer of the double-layer shell, at least two valves communicated with the channels are arranged on the shell, the circulation direction of at least one valve is inward, and the circulation direction of at least one valve is outward.
Further, the channels are arranged on the periphery in the shell.
Further, the valve controller is connected with the pressure sensor and the switch of the valve, the pressure sensor is used for detecting the pressure in the channel, and when the pressure value detected by the pressure sensor is larger than the pressure threshold value in the channel, the valve controller controls at least one valve with the outward flowing direction to open.
Further, the valve controller is connected with the valve controller, the temperature sensor is used for detecting the temperature in the channel, and when the temperature value detected by the temperature sensor is greater than the temperature threshold value in the channel, the valve controller controls the valve to be opened in at least one flowing direction and controls the valve to be opened in at least one flowing direction outwards.
Further, the valve controller controls the valve to close when the pressure value detected by the pressure sensor is less than the pressure threshold value in the passage and the temperature value detected by the temperature sensor is less than the temperature threshold value in the passage.
Further, an air pump is connected to the valve in the outward flowing direction, and air in the channel is pumped by the air pump, so that negative pressure is formed inside the channel.
Further, the valve is a two-way valve.
Further, dustproof cloth is arranged on the valve.
Further, the bottom of the shell is provided with a plurality of ribs.
Further, a phase change material is filled between the inner wall of the shell and the battery pack.
Compared with the prior art, the invention has the beneficial effects that: 1. the channel is connected with the valve, so that the external air and the channel form an air flow channel, redundant heat is taken away through air circulation, the cooling effect is achieved, and the heat insulation effect is achieved in the state that the valve is closed; 2. the periphery in the shell is provided with the channels which are mutually communicated, so that when air flows through the channels, the periphery of the shell can be filled with circulated air, and the heat dissipation effect is better; 3. the valves are preferably bidirectional valves, so that the selection diversity is increased, and the number of valves with inward or outward circulation directions can be selected according to different conditions of the internal temperature of the box body; 4. the air in the channel can be extracted through the valve, so that a certain negative pressure is formed in the channel, and a better heat insulation effect is realized; 5. the pressure sensor is arranged to detect the pressure in the channel, and when the detected value is larger than a pressure threshold value, the controller controls the valve with the outward flowing direction to open so as to release the pressure, so that the danger of explosion caused by expanding the internal air when the temperature in the channel is too high can be avoided; 6. the temperature sensor is arranged to detect the temperature in the channel, and when the temperature is too high, the controller controls the valve to automatically turn to the direction of exhaust cooling, so that the heat dissipation function is achieved; 7. and a dustproof cloth is arranged at the outlet of the valve and can be used for blocking dust or large particulate matters in the outside air from entering the channel so as to prevent the channel from being blocked.
Drawings
FIG. 1 is a partial exploded view of a battery box in accordance with a first embodiment;
FIG. 2 is a cross-sectional elevation view of the battery compartment of the present invention;
FIG. 3 is a control circuit diagram of the controller of the present invention;
FIG. 4 is a temperature control block diagram of the main heater of the present invention when heating;
FIG. 5 is a temperature control block diagram of the auxiliary heater of the present invention when heating;
FIG. 6 is a schematic view of the structure of the battery pack of the present invention;
fig. 7 is a partial exploded view of a battery box in a fourth embodiment;
fig. 8 is a front cross-sectional view of the battery case of the present invention;
FIG. 9 is a cross-sectional view of the back side of the battery compartment of the present invention;
fig. 10 is a circuit control diagram of the valve controller of the present invention.
Detailed Description
The above and further technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example 1
Fig. 1, fig. 2, fig. 3 and fig. 4 are respectively a partial exploded view of the battery box, a sectional front view of the battery box, a control circuit diagram of the controller and a temperature control block diagram of the main heater during heating.
Referring to fig. 1 and 2, a battery box includes a case 1; a main heater 2; a controller 3; a battery 4 immersed in the phase change material 5.
As shown in fig. 3 and 4, the controller 3 acquires the temperature of the atmosphere outside the casing 1 through the first temperature sensor 31, acquires the temperature of the main heater 2 through the second temperature sensor 32, acquires the voltage signal of the battery pack 4 through the a/D conversion circuit 33 built therein, and converts the voltage signal into a digital voltage value, when the temperature value detected by the first temperature sensor 31 is smaller than a preset first temperature interval, and the temperature value detected by the second temperature sensor 32 is smaller than a preset second temperature interval, and simultaneously the voltage value detected by the a/D conversion circuit 33 is larger than a preset first voltage interval, the controller 3 starts the main heater 2 to operate, and transfers the heat of the main heater to the phase change material 5 for energy storage, preferably, a heat conducting plate 21 is arranged between the main heater 2 and the phase change material 5 (not shown in fig. 1), so that the heat of the main heater 2 is conductive to the phase change material 5, and the heat of the phase change material 5 is conductive to the outside the casing 1 through the heat conducting plate 21.
The battery pack 4 is packaged in the phase change material 5, so that the effect of direct energy storage and heat preservation can be achieved, the phase change material 5 is made of a polymer composite phase change material, the phase change temperature of the polymer composite phase change material is 40-50 ℃, and the polymer composite phase change material has the characteristic of insulation and can be directly packaged together with the battery pack 4; the flame-retardant PVC plastic has the characteristic of flame retardance, and is safe and reliable in use; has a high thermal conductivity (thermal conductivity K > 0.8), and is capable of conducting heat of the battery pack 4 to the inner wall of the case 1 through the phase change material 5, and diffusing the heat to the outside through the case 1.
Examples are as follows: the ambient temperature value detected by the first temperature sensor 31 is T 1 The preset first temperature interval is more than or equal to 20 ℃ and less than or equal to 25 ℃; the temperature value of the main heater detected by the second temperature sensor 32 is T 2 The preset second temperature interval is more than or equal to 40 ℃ and less than or equal to 45 ℃; the voltage value detected by the A/D analog-to-digital conversion circuit 33 built in the controller 3 is U 1 The preset first voltage interval is 25.2V less than or equal to U less than or equal to 26.4V, when the voltage is controlledThe controller simultaneously detects T 1 <20℃，T 2 <40℃，U>At 26.4V, the controller 3 activates the main heater 2 to enter an operating state.
Before the controller 3 is controlled, self-checking and initialization are required to be completed so as to ensure that the controller 3 can normally and stably work, and the self-checking and initialization are required to run in a state that the battery box is connected with an external charger or a battery switch is turned on; the battery box is ensured to be in an environment with proper temperature by detecting the atmospheric environment temperature; avoiding overheating of the phase change material 5 by detecting the temperature of the main heater 2; by determining the voltage of the battery pack 4 (U >26.4V, indicating external charger access), it is ensured that the main heater 2 is started when an external charger is accessed.
According to the battery box, the heater 2 heats the phase change material 5 with high heat storage value, and the battery pack 4 is immersed in the phase change material 5, so that the temperature balance of each area of the battery pack 4 can be ensured under the condition of low consumption, and the battery box can be applied to an extremely low temperature environment of minus 20 ℃ to minus 40 ℃.
Example two
As described above, the present embodiment is different from the present embodiment in that, as shown in fig. 4, when the temperature value detected by the first temperature sensor 31 is between preset first temperature intervals or the temperature value detected by the second temperature sensor 32 is between preset second temperature intervals or the voltage value detected by the a/D conversion circuit 33 is between preset first voltage intervals, the controller 3 controls the main heater 2 to maintain the original state.
When the temperature value detected by the first temperature sensor 31 is greater than a preset first temperature interval or the temperature value detected by the second temperature sensor 32 is greater than a preset second temperature interval or the voltage value detected by the a/D analog-to-digital conversion circuit 33 is less than a preset first voltage interval, the controller 3 controls the main heater 2 to stop working.
Examples are as follows: the first temperature sensorThe ambient temperature value detected by the sensor 31 is T 1 The preset first temperature interval is more than or equal to 20 ℃ and less than or equal to 25 ℃; the temperature value of the main heater 2 detected by the second temperature sensor 32 is T 2 The preset second temperature interval is more than or equal to 40 ℃ and less than or equal to 45 ℃; the voltage value detected by the A/D analog-to-digital conversion circuit 33 built in the controller 3 is U 1 The preset first voltage interval is 25.2V less than or equal to U less than or equal to 26.4V, when the controller 3 detects T 1 、T 2 、U 1 When any one of the above-mentioned sections is located between the above-mentioned sections, the controller 3 controls the main heater 2 to maintain the original state, and when the controller 3 detects T 1 >25 ℃ or T 2 >45 ℃ or U 1 <At any one of 25.2V, the controller 3 controls the main heater 2 to stop operating.
According to the invention, the main heater 2 stops working by detecting the ambient temperature or the temperature of the main heater or the voltage of the battery pack, so that the main heater 2 can be prevented from being heated when the battery box exceeds a certain threshold range.
Example III
As described above, the present embodiment is different from the above-mentioned battery box in that, as shown in fig. 6, which is a schematic structural diagram of the battery pack, and as shown in fig. 5 and 6, a battery box further includes an auxiliary heater 6 connected to the controller 3, the controller 3 obtains the temperature of the battery pack 4 through a third temperature sensor 34, and when the temperature value detected by the third temperature sensor 34 is smaller than a preset third temperature interval and the voltage value detected by the a/D analog-to-digital conversion circuit 33 is larger than a preset second voltage interval, the controller 3 activates the auxiliary heater 6 to directly heat the battery pack 4. In this embodiment, the auxiliary heater is preferably disposed inside the battery pack 4, so that the auxiliary heater 6 can directly heat the battery pack.
When the temperature value detected by the third temperature sensor 34 is within a preset third temperature interval or the voltage value detected by the a/D conversion circuit 33 is within a preset second voltage interval, the controller 3 controls the auxiliary heater 6 to maintain the original state.
When the temperature value detected by the third temperature sensor 34 is greater than a preset third temperature interval or the voltage value detected by the a/D conversion circuit 33 is less than a preset second voltage interval, the controller 3 controls the auxiliary heater 6 to stop working.
Examples are as follows: the battery pack temperature value detected by the third temperature sensor 34 is T 3 The preset third temperature interval is more than or equal to 5 ℃ and less than or equal to 6 ℃; the voltage value detected by the A/D analog-to-digital conversion circuit 33 built in the controller 3 is U 1 The preset second voltage interval is 25.2V less than or equal to U less than or equal to 25.6V, when the controller 3 detects T 3 <5 ℃ and simultaneously U 1 >When 25.6V, the controller 3 starts the auxiliary heater 6 to enter a working state, and when the controller 3 detects T 3 、U 1 When any one of the above-mentioned sections is located between the above-mentioned sections, the controller 3 controls the auxiliary heater 6 to maintain the original state, and when the controller 3 detects T 1 >6 ℃ or U 1 <At any one of 25.2V, the controller 3 controls the auxiliary heater 6 to stop operating.
In this embodiment, the criteria for the activation of the auxiliary heater 6 are two conditions, namely, the battery temperature and the battery voltage, and the auxiliary heater 6 may be activated when the battery temperature is low and the heating circuit voltage is greater than the minimum activation voltage.
The power supply of the auxiliary heater 6 may be an external charger, when it is detected that U >26.4V indicates that the external charger is connected, and at this time, if the temperature of the battery pack 4 is low, the auxiliary heater 6 is started to directly heat the battery pack 4, so as to ensure that the battery pack 4 can meet the condition of the minimum charging working temperature, and avoid permanent damage to the battery pack caused by low-temperature charging; the power supply of the auxiliary heater 6 may also be the energy provided by the battery pack 4, when detecting that U <26.4V indicates that no external charger is connected, at this time, the main heater 2 stops working, if the temperature of the battery pack 4 is lower, the electric energy stored in the battery pack 4 is used for heating, and then the battery pack 4 is directly heated by the heat conducting material, which is a strategy for sacrificing part of the performance to ensure the residual power supply capability, and the direct heating also ensures the maximization of the utility.
In the battery box, under the condition that an external charger is connected, the battery pack 4 can meet the condition of the minimum working temperature through the cooperation of the main heater 2 and the auxiliary heater 6; the electric energy stored by the battery pack itself can also be used for heating without an external charger, ensuring the discharge performance of the battery pack 4 in extreme climatic conditions.
Example IV
Referring to fig. 7, 8 and 9, there are shown a partially exploded view, a front sectional view and a back sectional view of the battery case of the present invention.
Referring to fig. 7 to 9, a battery box includes a casing 1, the casing 1 is a double-layer casing, a plurality of channels 11 are provided between the inner layer and the outer layer, two valves are provided on the casing 1, the valves are connected with the channels 11, the circulation direction of one valve is inward, and the circulation direction of the other valve is outward.
Specifically, as shown in fig. 7 to 9, two valves are disposed on the housing 1 and are respectively connected in series with the channel 11, wherein one valve 12 can be used for controlling air inlet, the other valve 13 can be used for controlling air outlet, and when both valves are in a closed state, air in the channel 11 is in a non-circulation state, so that an effect of heat insulation and heat preservation can be achieved; as shown in fig. 7 and 8, the direction indicated by the arrow in the drawing is the air flowing direction, when both valves are in the open state, that is, the flowing direction of one valve 12 is inward, the flowing direction of the other valve 13 is outward, the external air returns to the external space through one valve 12, the channel 11 in the shell and the other valve 13, and the air flow channel formed by the external air and the channel 11 can take away the redundant heat through the air circulation, so as to play a role of cooling.
Preferably, the channels 11 are provided on the periphery of the housing 1, so that the periphery of the housing 1 can be filled with circulating air when air flows through the channels 11, and the heat dissipation effect is better.
Preferably, the valves in this embodiment are bidirectional valves, and because the circulation direction of the bidirectional valves can be outward or inward, when a plurality of bidirectional valves are installed on the housing 1, the circulation direction of at least one valve can be randomly selected to be inward, and the circulation direction of at least one valve is selected to be outward, for example, when four bidirectional valves are installed, the circulation direction of one valve can be selected to be inward, the circulation direction of one valve is outward, and other valves are closed; or the circulation direction of one valve can be inwards, the circulation directions of the other three valves are outwards or other selection modes can be selected, the selection diversity is increased, and the selection condition can be selected according to different conditions of the temperature in the box body.
Preferably, a dust cloth (not shown) is provided at the outlet of the valve for blocking dust or large particulate matters in the outside air from entering the passage 11 to prevent clogging of the passage 11.
Further, in this embodiment, the air in the channel 11 may be extracted through the valve, so that a certain negative pressure is formed in the channel 11, and a better heat insulation effect is achieved.
In this embodiment, the number of the valves is not limited to two, but may be more than two, wherein the flow direction of at least one of the valves is inward, and the flow direction of at least one of the valves is outward.
Example five
A battery box as described above, the present embodiment is different from the above, in that, as shown in fig. 10, it is a circuit control diagram of a valve controller, and a battery box further includes a valve controller 7 connected to the pressure sensor 71 and the switch 72 of the valve, wherein the pressure sensor 71 is used for detecting the pressure in the channel 11, and when the pressure value detected by the pressure sensor 71 is greater than the pressure threshold in the channel 11, the valve controller 3 controls the opening of the valve outward in at least one flow direction.
In this embodiment, the pressure sensor 71 is provided to detect the pressure in the channel 11, and when the detected value is greater than the pressure threshold value, the controller controls the valve to open in the outward direction of flow to release the pressure, so that the risk of explosion due to expansion of the internal air when the temperature in the channel 11 is too high can be avoided.
Example six
A battery box as described above, the present embodiment is different from the above, in that, as shown in fig. 10, it is a circuit control diagram of a valve controller, a battery box further includes a temperature sensor 73 connected to the valve controller 3, the temperature sensor 73 is used for detecting the temperature in the channel 11, when the temperature value detected by the temperature sensor 73 is greater than the temperature threshold in the channel 11, the valve controller 3 controls the valve to turn to exhaust air for cooling; when the pressure value detected by the pressure sensor 71 is smaller than the pressure threshold value in the channel 11 and the temperature value detected by the temperature sensor 73 is smaller than the temperature threshold value in the channel 11, the valve controller 3 controls the valve to be closed so as to play a role in heat insulation and preservation.
In this embodiment, when the temperature is too high, the phase change material 5 with high thermal conductivity coefficient can conduct internal heat to the inner wall of the shell 1, and the controller 3 controls the valve to automatically turn to the direction of exhaust cooling, so as to achieve the function of heat dissipation, and simultaneously can reduce the pressure in the channel 11; when the temperature is too low, if the pressure value detected by the pressure sensor 71 is smaller than the pressure threshold value in the channel 11, the closing of the valve can be controlled to ensure that the inside of the channel 11 is in a closed state again under the condition that the pressure in the channel 11 is in a safe state, and at this time, the too low temperature in the channel 11 can be compensated for by the phase change material 5 stored in the shell 1.
Example seven
The battery box of the present embodiment is different from the above-mentioned one in that, as shown in fig. 7, the bottom of the housing 1 is provided with a plurality of ribs 8 for supporting the weight inside the housing 1.
In the above embodiment, the main heater 2 is used for heating, the auxiliary heater 6 is used for compensating the temperature, and the phase change material 5 is used for directly packaging the battery pack 4, so that the functions of heat storage and heat preservation are realized; the air channel of the internal circulation of the shell and the opening direction of the automatic control valve realize the dual functions of air heat insulation, heat preservation, heat dissipation and temperature reduction.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and additions may be made to those skilled in the art without departing from the method of the present invention, which modifications and additions are also to be considered as within the scope of the present invention.
Claims (5)
1. The battery box comprises a shell, wherein a battery pack is arranged in the shell, and the battery box is characterized in that the shell is a double-layer shell, a plurality of mutually communicated channels are arranged between an inner layer and an outer layer of the double-layer shell, at least two valves communicated with the channels are arranged on the shell, the circulation direction of at least one valve is inward, and the circulation direction of at least one valve is outward; the valve with the outward flowing direction is connected with an air pump, and air in the channel is pumped by the air pump to form negative pressure in the channel;
the battery box further comprises a valve controller which is connected with the pressure sensor and the switch of the valve, wherein the pressure sensor is used for detecting the pressure in the channel, and when the pressure value detected by the pressure sensor is greater than the pressure threshold value in the channel, the valve controller controls at least one valve with an outward flowing direction to be opened;
the battery box further comprises a temperature sensor which is connected with the valve controller, wherein the temperature sensor is used for detecting the temperature in the channel, and when the temperature value detected by the temperature sensor is greater than a temperature threshold value in the channel, the valve controller controls the valve in at least one flowing direction to open and controls the valve out at least one flowing direction to open;
the valve controller controls the valve to be closed when the pressure value detected by the pressure sensor is smaller than the pressure threshold value in the channel and the temperature value detected by the temperature sensor is smaller than the temperature threshold value in the channel;
and a phase change material is filled between the inner wall of the shell and the battery pack, wherein the battery pack is immersed in the phase change material.
2. The battery box of claim 1, wherein the channels are provided on a periphery within the housing.
3. The battery box according to claim 1 or 2, wherein the valve is a two-way valve.
4. A battery box according to claim 1 or 2, wherein the valve is provided with a dust cloth.
5. The battery box according to claim 1 or 2, wherein the bottom of the housing is provided with a plurality of ribs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710237554.7A CN106876626B (en) | 2017-04-12 | 2017-04-12 | Battery box |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109216790A (en) * | 2017-06-29 | 2019-01-15 | 青岛恒金源电子科技有限公司 | A kind of battery pack for being run under hot environment |
| CN108107940A (en) * | 2018-01-31 | 2018-06-01 | 北京国能电池科技股份有限公司 | Temperature regulation integrated control system and battery pack |
| CN108346837A (en) * | 2018-02-27 | 2018-07-31 | 王灿灿 | A kind of automobile storage battery humidity control system |
| CN108428967B (en) * | 2018-04-16 | 2020-08-18 | 普天新能源（深圳）有限公司 | Battery device and heat dissipation method for battery device |
| CN109742289B (en) * | 2018-11-23 | 2022-01-14 | 颍上北方动力新能源有限公司 | Lithium battery |
| CN110061323B (en) * | 2019-03-29 | 2021-02-09 | 华为技术有限公司 | Heat management device, heat management system and new energy automobile |
| KR102761658B1 (en) * | 2019-07-03 | 2025-01-31 | 주식회사 엘지에너지솔루션 | Battery module, battery pack and energy storage system comprising the same |
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