Assembly for adjusting operating temperature of power battery

Abstract

The utility model discloses an assembly for adjusting the operating temperature of a power battery, which comprises a battery box, an air blower, a three-way valve, a heat dissipation mechanism and a heat exchange mechanism, a temperature sensor is arranged in the battery box, an air inlet of the air blower is communicated with the battery box, an air outlet of the air blower is communicated with one way of the three-way valve, and the heat exchange mechanism is communicated with the three-way valve. Cooling fins and a fan are arranged in the cooling mechanism, the fan faces the cooling fins, an air outlet of the cooling fins is communicated with the battery box, the heat exchange mechanism is composed of a heat exchange box and a heater, the heater is arranged in the heat exchange box, an air outlet of the heat exchange box is communicated with the battery box, and the heater is arranged in the heat exchange box. And the other two ways of the three-way valve are respectively communicated with the air inlet of the radiating fin and the air inlet of the heat exchange box. The utility model provides an assembly for adjusting the operating temperature of a power battery. A heating mode or a cooling mode can be switched according to the operating environment of a battery box.

Description

Technical Field

[0001] This utility model relates to the field of battery accessory equipment, and in particular to a component for regulating the operating temperature of a power battery. Background Technology

[0002] As the core component of electric vehicles, the power battery directly affects the performance of electric vehicles; among them, lithium batteries are widely used in pure electric vehicles due to their excellent energy density, power output characteristics and long life.

[0003] When a power battery is charged and discharged, it generates high temperatures. These high temperatures cause side reactions between the active materials and the electrolyte in the lithium battery, leading to a loss of lithium battery capacity. At this time, it is necessary to cool down the power battery to bring its own temperature to the optimal operating temperature. When a vehicle is driven in a cold winter, the low temperature of the surrounding environment will further reduce the operating temperature of the power battery. The migration rate of electrolyte ions in the lithium battery slows down, resulting in an increase in the internal resistance of the battery, which affects the current transmission and reduces the energy capacity of the lithium battery. At this time, it is necessary to heat up the power battery to bring its own temperature to the optimal operating temperature.

[0004] However, traditional power batteries lack thermal management devices or only have a single cooling or heating function, which cannot meet the requirement of switching the heating mode or cooling mode of the power battery according to the ambient temperature. Utility Model Content

[0005] The purpose of this invention is to provide a component for regulating the operating temperature of a power battery, which can switch between heating and cooling modes according to the usage environment of the battery box.

[0006] The technical solution adopted by the component for regulating the operating temperature of a power battery disclosed in this utility model is as follows:

[0007] The device includes a battery box, a blower, a three-way valve, a heat dissipation mechanism, and a heat exchange mechanism. The battery box contains a temperature sensor. The blower's air inlet is connected to the battery box, and its air outlet is connected to one of the three-way valves. The heat dissipation mechanism contains heat sinks and a fan, with the fan facing the heat sinks. The heat sink's air outlet is connected to the battery box. The heat exchange mechanism consists of a heat exchange chamber and a heater. The heater is placed inside the heat exchange chamber, and the heat exchange chamber's air outlet is connected to the battery box. The other two ports of the three-way valve are connected to the heat sink's air inlet and the heat exchange chamber's air inlet, respectively.

[0008] As a preferred embodiment, the battery box contains multiple rows of battery packs arranged at intervals, wherein two rows of battery packs and the inner wall of the battery box form a first air duct, and two adjacent rows of battery packs form a second air duct, and the first air duct and the second air duct are connected.

[0009] As a preferred embodiment, multiple partitions extend from the inner wall of the battery box, the partitions cutting off the first air duct, and the two first air ducts and multiple second air ducts form a serpentine, interwoven channel.

[0010] As a preferred embodiment, the heater is a PTC heater.

[0011] As a preferred embodiment, an evaporator is installed inside the heat exchange box.

[0012] As a preferred embodiment, a filter mechanism is connected between the blower and the battery box.

[0013] As a preferred embodiment, the filtration mechanism includes a filter tank, which contains absorbent material that divides the interior of the filter tank into a first chamber and a second chamber. The battery box is connected to the first chamber of the filter tank, and the blower is connected to the second chamber of the filter tank.

[0014] As a preferred embodiment, the device also includes a drying tank and a fire extinguishing device. The air outlets of the heat sink and the heat exchange box are respectively connected to the drying tank. The drying tank is connected to the battery box, and the fire extinguishing device is connected to the battery box.

[0015] As a preferred embodiment, the heat sink is composed of a serpentine, reciprocating air duct, with multiple rows of spaced fins fixedly connected to the outside of the air duct, and the air inlet and outlet of the air duct are respectively connected to a three-way valve and a drying tank.

[0016] The beneficial effects of the component for regulating the operating temperature of a power battery disclosed in this utility model are:

[0017] When the temperature sensor detects that the battery box temperature is too high and needs to be lowered, the blower draws hot air from the battery box and directs it to the three-way valve. The three-way valve closes the connection with the heat exchange box and opens the connection with the heat sink. The three-way valve directs the hot air to the heat sink, where it exchanges heat and is converted into cold air. The fan cools the heat sink, and the heat sink guides the cooled air into the battery box. The cooled air is then converted into hot air and drawn back into the battery box by the blower, and the cycle repeats.

[0018] When the temperature sensor detects that the battery compartment temperature is too low and needs to be increased, the blower draws cold air from the battery compartment. The three-way valve closes the connection to the heat sink and opens the connection to the heat exchange box. The three-way valve guides the cold air into the heat exchange box, where it exchanges heat with the heater to become hot air. The heat exchange box then guides the heated air into the battery compartment. The hot air raises the temperature of the battery compartment and is then converted back into cold air, which is drawn back by the blower. This cycle repeats continuously, thus achieving the effect of heating the battery compartment when the temperature is too low and cooling it when the temperature is too high. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a component for regulating the operating temperature of a power battery according to this utility model.

[0020] Figure 2 This is a schematic diagram of the battery box installation of a component for regulating the operating temperature of a power battery according to this utility model (the arrow indicates the direction of airflow).

[0021] Figure 3 This is a schematic diagram of the battery pack structure of a component for regulating the operating temperature of a power battery according to this utility model.

[0022] Figure 4 This is a cross-sectional view of the battery box of a component for regulating the operating temperature of a power battery according to this utility model (the arrow indicates the direction of airflow).

[0023] Figure 5 This is a cross-sectional view of the filter tank of a component for regulating the operating temperature of a power battery according to this utility model.

[0024] Figure 6 This is a cross-sectional view of a blower for a component of this utility model that regulates the operating temperature of a power battery.

[0025] Figure 7 This is a schematic diagram of the heat dissipation mechanism of a component for regulating the operating temperature of a power battery according to this utility model.

[0026] Figure 8 This is a cross-sectional view of the heat exchange box of a component for regulating the operating temperature of a power battery according to this utility model. Detailed Implementation

[0027] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0028] Please refer to Figures 1-4 .

[0029] This utility model discloses a component for regulating the operating temperature of a power battery, including a battery box 1, a blower 3, a three-way valve 4, a heat dissipation mechanism 5, a heat exchange mechanism 6, a drying tank 7, and a fire extinguishing device 8.

[0030] In this embodiment, the battery box 1 is preferably composed of a base 11 and a cover plate 12. The base 11 has a recessed groove, and the cover plate is placed on the recessed groove. A temperature sensor is provided in the recessed groove of the battery box 1.

[0031] Furthermore, multiple rows of battery packs 13 are placed in the sink of the battery box 1 at intervals. In this embodiment, the battery packs 13 are preferably cuboids. The cuboid battery packs 13 can increase the contact area between the battery packs 13 and the air, and improve the efficiency of heat exchange with the air. Multiple slots 111 are opened at intervals on the bottom of the sink. The battery packs 13 are placed in the slots 111, and the slots 111 prevent the battery packs 13 from moving in the sink. Two rows of battery packs 13 and the inner wall of the sink form a first air duct 112, and a second air duct 113 is formed between two adjacent rows of battery packs 13. The first air duct 112 and the second air duct 113 are connected.

[0032] In this embodiment, the battery pack 13 near the inner wall of the sink is preferably spaced three millimeters apart from the inner wall of the sink. In this embodiment, the battery pack 13 is preferably spaced three millimeters apart from two adjacent battery packs. When the battery box 1 is impacted and deforms, the three-millimeter gap width allows for a certain space between each battery pack 13, preventing damage to the battery pack 13 from the impact, and also allowing the deformation of the battery box 1 to absorb the impact force.

[0033] Furthermore, multiple partitions 114 extend into the recess of the battery box 1. The partitions 114 touch the adjacent battery packs 13. The partitions 114 cut off the first air ducts 112, so that the two first air ducts 112 and multiple second air ducts 113 form a serpentine channel that interweaves back and forth, allowing cold or hot air to flow in the channel and exchange heat with each battery pack.

[0034] Please refer to Figure 1 and Figure 5 .

[0035] A filter mechanism 2 is connected between the blower 3 and the battery box 1. The air inlet of the blower 3 is connected to the battery box 1 through the filter mechanism 2. The filter mechanism 2 includes a filter canister 21. The filter canister 21 is provided with a water-absorbing material 22. The water-absorbing material 22 divides the interior of the filter canister 21 into a first chamber 211 and a second chamber 212. The first chamber 211 is located below the second chamber 212. The air in the first chamber 211 needs to pass through the water-absorbing material 22 to enter the second chamber 212. The battery box 1 is connected to the first chamber 211 of the filter canister 21, and the blower 3 is connected to the second chamber 212 of the filter canister 21.

[0036] When the base 11 or cover 12 is damaged or not properly sealed, water will enter the battery box 1. The air in the battery box 1 mixed with water will enter the first cavity 211 through the connection between the battery box 1 and the filter canister 21. When the air passes through the water-absorbing material 22, the water-absorbing material 22 will absorb the water. The change of the water-absorbing material 22 can be observed to determine whether water has entered the battery box 1.

[0037] Please refer to Figure 1 , Figure 5 and Figure 6 .

[0038] In this embodiment, the blower 3 is preferably a high-pressure blower 3. The air inlet of the blower 3 is connected to a first pipe 31, and the air outlet of the blower 3 is connected to a second pipe 32.

[0039] Furthermore, the air inlet of the blower 3 is connected to the second cavity 212 of the filter tank 21 through the first pipe 31. The diameter of the first pipe 31 is larger than the diameter of the second pipe 32. The smaller diameter second pipe 32 can compress air when the blower 3 blows out air. The air outlet of the blower 3 is connected to one of the three-way valves 4 through the second pipe 32.

[0040] Blower 3 draws air from battery box 1 through filter canister 21, and then injects the drawn air into three-way valve 4.

[0041] Please refer to Figure 1 , Figure 7 and Figure 8 .

[0042] The heat dissipation mechanism 5 includes a frame, and in this embodiment, the frame is preferably a rectangular frame structure. The heat dissipation mechanism 5 is provided with a heat sink and a fan 52. The heat sink and the fan 52 are both placed inside the frame. The fan 52 faces the heat sink. The air outlet of the heat sink is connected to the battery box 1 through the drying tank 7.

[0043] The heat exchange mechanism 6 consists of a heat exchange box 61 and a heater 611. The outlet of the heat exchange box 61 is connected to the battery box 1 through the drying tank 7.

[0044] The other two ports of the three-way valve 4 are connected to the air inlet of the heat sink and the air inlet of the heat exchange box 61, respectively.

[0045] Furthermore, the heat sink is composed of a serpentine, reciprocating air duct 511. Multiple rows of spaced fins 512 are fixedly connected to the outside of the air duct 511. The air inlet of the air duct 511 is connected to a three-way valve 4, which injects air into the air duct 511. When the air flows in the air duct 511, it exchanges heat with the air duct 511, reducing the temperature of the air and turning it into cold air. The air duct 511 transfers heat to the fins 512. The fan 52 dissipates heat and cools the air duct 511 and the fins 512. The air outlet of the air duct 511 is connected to the drying tank 7.

[0046] Furthermore, the heater 611 is placed inside the heat exchange box 61. In this embodiment, the heater 611 is preferably a PTC heater 611. The three-way valve 4 injects air into the heat exchange box 61. When the air passes through the heater 611, the heater 611 heats the air and converts it into hot air. The air outlet of the heat exchange box 61 is connected to the drying tank 7, and the drying tank 7 is connected to the battery box 1. This means that the air in the heat exchange box 61 and the heat sink needs to pass through the drying tank 7 before it can be injected into the battery box 1. The drying tank 7 absorbs moisture from the air and reduces the moisture content of the air injected into the battery box 1. A pressure sensor is installed at the connection between the drying tank 7 and the battery box 1. Since there is only a three-millimeter distance between the two adjacent battery packs 13, when one of the battery packs 13 bulges and expands, it will block the channel, resulting in poor airflow in the channel. The pressure sensor is used to monitor whether the airflow inside the battery box 1 is smooth, so as to monitor the operation of the battery pack 13.

[0047] Furthermore, an evaporator 612 is installed inside the heat exchange box 61, and the evaporator 612 is connected to an external refrigeration device; when the heater 611 is running, the evaporator 612 stops running, and when the evaporator 612 is running, the heater 611 stops running; the evaporator 612 can further reduce the temperature of the air.

[0048] In this embodiment, the preferred fire extinguishing device 8 is a fire extinguisher. The fire extinguishing device 8 is connected to the battery box 1. When the temperature of the battery pack 13 in the battery box 1 is too high and the temperature sensor detects a fire, the fire extinguishing device 8 injects dry ice into the battery box 1. This quickly reduces the temperature inside the battery box 1 and also isolates oxygen to extinguish the fire.

[0049] Please refer to Figures 1-8 .

[0050] At runtime:

[0051] The operating temperature of the battery box 1 is monitored by a temperature sensor. When the operating temperature of the battery box 1 is high, the blower 3 draws hot air from the battery box 1 through the filter canister 21 and injects the hot air into the three-way valve 4. The three-way valve 4 closes the connection with the heat exchange box 61 and opens the connection with the heat sink, injecting the hot air into the heat sink. The hot air exchanges heat with the heat sink to reduce its temperature and is converted into cold air. The heat sink injects the cold air into the battery box 1 through the drying canister 7. The cold air flows along the channel and exchanges heat with the battery packs 13 on both sides of the channel to convert them into hot air. The blower 3 then draws the hot air away, and the cycle repeats to cool the battery box 1.

[0052] The operating temperature of the battery box 1 is monitored by a temperature sensor. When the operating temperature of the battery box 1 is too high, the blower 3 draws hot air from the battery box 1 through the filter canister 21 and injects the hot air into the three-way valve 4. The three-way valve 4 closes the connection with the heat sink and opens the connection with the heat exchange box 61, injecting hot air into the heat exchange box 61. The evaporator 612 starts to run and can more efficiently reduce the hot air at a higher temperature, converting it into cold air at a lower temperature. The heat exchange box 61 injects cold air into the battery box 1 through the drying canister 7. The cold air flows along the channel and exchanges heat with the battery packs 13 on both sides of the channel, converting them into hot air. The blower 3 then draws the hot air away, and the cycle repeats to cool the battery box 1.

[0053] The operating temperature of the battery box 1 is monitored by a temperature sensor. When the operating temperature of the battery box 1 is too low, the blower 3 draws out the high-temperature cold air from the battery box 1 through the filter canister 21 and injects the cold air into the three-way valve 4. The three-way valve 4 closes the connection with the heat sink and opens the connection with the heat exchange box 61, injecting the cold air into the heat exchange box 61. The evaporator 612 stops operating, and the heater 611 starts operating. The heater 611 raises the temperature of the cold air and converts it into hot air. The heat exchange box 61 injects the hot air into the battery box 1 through the drying canister 7. The hot air flows along the channel and exchanges heat with the battery packs 13 on both sides of the channel to convert them into cold air, allowing the temperature of the battery packs 13 to rise back to the optimal operating temperature. The blower 3 then draws the cold air away, and the cycle repeats to control the temperature of the battery box 1.

[0054] This utility model provides a component for regulating the operating temperature of a power battery. When the temperature sensor detects that the battery box temperature is too high and needs to be reduced, the blower draws hot air from the battery box and directs it to a three-way valve. The three-way valve closes the connection with the heat exchange box and opens the connection with the heat sink. The three-way valve directs the hot air to the heat sink and exchanges heat with it to convert it into cold air. The fan cools the heat sink, and the heat sink introduces the cooled air into the battery box. The cold air cools the battery box and is converted into hot air, which is then drawn in by the blower. This cycle repeats continuously.

[0055] When the temperature sensor detects that the battery compartment temperature is too low and needs to be increased, the blower draws cold air from the battery compartment. The three-way valve closes the connection to the heat sink and opens the connection to the heat exchange box. The three-way valve guides the cold air into the heat exchange box, where it exchanges heat with the heater to become hot air. The heat exchange box then guides the heated air into the battery compartment. The hot air raises the temperature of the battery compartment and is then converted back into cold air, which is drawn back by the blower. This cycle repeats continuously, thus achieving the effect of heating the battery compartment when the temperature is too low and cooling it when the temperature is too high.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A component for regulating the operating temperature of a power battery, characterized in that, Includes battery box, blower, three-way valve, heat dissipation mechanism and heat exchange mechanism; The battery box is equipped with a temperature sensor. The air inlet of the blower is connected to the battery box, and the air outlet of the blower is connected to one of the three-way valves. The heat dissipation mechanism includes a heat sink and a fan. The fan faces the heat sink, and the air outlet of the heat sink is connected to the battery box. The heat exchange mechanism consists of a heat exchange box and a heater. The heater is placed inside the heat exchange box, and the air outlet of the heat exchange box is connected to the battery box. The other two ports of the three-way valve are connected to the air inlet of the heat sink and the air inlet of the heat exchange box, respectively.

2. The component for regulating the operating temperature of a power battery as described in claim 1, characterized in that, The battery box contains multiple rows of battery packs arranged at intervals. Two rows of battery packs and the inner wall of the battery box form a first air duct, and two adjacent rows of battery packs form a second air duct. The first air duct and the second air duct are connected.

3. The component for regulating the operating temperature of a power battery as described in claim 2, characterized in that, Multiple partitions extend from the inner wall of the battery box, and the partitions cut off the first air duct. The two first air ducts and multiple second air ducts form a serpentine, interwoven channel.

4. The component for regulating the operating temperature of a power battery as described in claim 1, characterized in that, The heater is a PTC heater.

5. A component for regulating the operating temperature of a power battery as described in claim 4, characterized in that, An evaporator is installed inside the heat exchange box.

6. A component for regulating the operating temperature of a power battery as described in any one of claims 1 or 5, characterized in that, A filter mechanism is connected between the blower and the battery box.

7. A component for regulating the operating temperature of a power battery as described in claim 6, characterized in that, The filtration mechanism includes a filter tank, which contains absorbent material that divides the interior of the filter tank into a first chamber and a second chamber. The battery box is connected to the first chamber of the filter tank, and the blower is connected to the second chamber of the filter tank.

8. A component for regulating the operating temperature of a power battery as described in claim 7, characterized in that, It also includes a drying tank and a fire extinguishing device. The air outlet of the heat sink and the air outlet of the heat exchange box are respectively connected to the drying tank. The drying tank is connected to the battery box, and the fire extinguishing device is connected to the battery box.

9. A component for regulating the operating temperature of a power battery as described in claim 8, characterized in that, The heat sink is composed of a serpentine, reciprocating air duct. Multiple rows of spaced fins are fixedly connected to the outside of the air duct. The air inlet and outlet of the air duct are connected to a three-way valve and a drying tank, respectively.

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