Hybrid power battery pack and hybrid power electric vehicle

Abstract

The invention provides a hybrid power battery pack and a hybrid power electric vehicle, and relates to the technical field of battery packs. The hybrid power battery pack and the hybrid power electric vehicle comprise a battery fixing mechanism, a sealing cover mechanism is arranged at the upper end of the battery fixing mechanism, a protection mechanism is fixedly arranged in the battery fixing mechanism, a battery body is fixedly arranged in the protection mechanism, and the battery fixing mechanism comprises a battery shell outer layer. A battery shell inner layer is fixedly arranged in the middle of the interior of the battery shell outer layer, a plurality of heat storage pieces are fixedly arranged between the battery shell outer layer and the battery shell inner layer, a plurality of ventilation openings are formed in the heat storage pieces in a penetrating mode, and the protection mechanism comprises a side protection sleeve. The problems that in a low-temperature environment, the efficiency of the battery pack is remarkably reduced, even the power failure condition possibly occurs, normal driving is affected, and driving safety is possibly endangered are solved through the battery fixing mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a hybrid power battery pack and a hybrid power electric vehicle. Background Art

[0002] A hybrid battery pack is a battery system used in hybrid electric vehicles (HEVs) that combines the advantages of an internal combustion engine and an electric motor to improve fuel efficiency and reduce emissions. Hybrid battery packs usually need to have a high power density to support the rapid charging and discharging requirements of the electric motor, and also have a certain energy density to provide an appropriate pure electric driving range. The design of hybrid battery packs is different from that of batteries used in pure electric vehicles (EVs). According to the national standard GB / T31486-2015 "Electrical Performance Requirements and Test Methods for Power Batteries for Electric Vehicles", a high-power battery refers to a battery with a ratio of the maximum allowable continuous output power and 1C rate discharge energy at room temperature of not less than 10. Hybrid electric vehicles usually use power-type power batteries, which are characterized by a discharge power of more than 10 times the power, and a discharge power per unit of power higher than the energy-type batteries carried by EV models. In general, the hybrid battery pack is a key component in the hybrid system. It improves the vehicle's fuel efficiency, reduces emissions, and provides a better driving experience by working in conjunction with the internal combustion engine.

[0003] The existing patent (publication number CN108470962B) discloses a hybrid battery pack and a hybrid electric vehicle. The hybrid battery includes a first shell, a second shell, an air cooling component, a battery module, a maintenance component, a battery management device, a power cut-off device and a seal. The second shell is provided with a plurality of fixing parts for fixed connection with the electric vehicle on the outside. The second shell includes a storage cavity with an opening. The battery module is arranged in the storage cavity. The battery management device, the power cut-off device and the maintenance component are arranged in the battery module. The air cooling component is attached to the outside of the second shell. The air cooling component is connected to the battery module arranged in the storage cavity. The seal is arranged at the opening. The first shell is buckled on the side of the seal away from the second shell. The hybrid battery pack can improve the structural matching degree between the hybrid battery pack and the hybrid electric vehicle under the premise of ensuring the reliable operation of the hybrid battery pack.

[0004] In the above-mentioned comparative patent, the heat dissipation function is achieved by installing an air cooling component inside the battery pack and ensuring that it is connected to the battery module placed in the storage cavity. However, during the operation of hybrid electric vehicles, since the battery pack of the drive motor has specific temperature requirements, the battery performance is poor under low temperature conditions, which may lead to insufficient power supply. Therefore, in the winter environment in northern regions, the efficiency of the battery pack is significantly reduced, and even power outages may occur, which not only affects normal driving, but may also endanger driving safety. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a hybrid battery pack and a hybrid electric vehicle, which solve the problem that in a low temperature environment, the efficiency of the battery pack is significantly reduced, and even power outages may occur, which not only affects normal driving but also may endanger driving safety.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hybrid battery pack, comprising a battery fixing mechanism, a sealing cover mechanism is arranged at the upper end of the battery fixing mechanism, a protection mechanism is fixedly arranged inside the battery fixing mechanism, and a battery body is fixedly arranged inside the protection mechanism;

[0009] The battery fixing mechanism comprises a battery shell outer layer, a battery shell inner layer is fixedly arranged at a middle position inside the battery shell outer layer, a plurality of heat storage sheets are fixedly arranged between the battery shell outer layer and the battery shell inner layer, and a plurality of vents are arranged through the plurality of heat storage sheets;

[0010] The protection mechanism comprises a side protection sleeve, a flame retardant filling is fixedly arranged inside the side protection sleeve, an expansion filling is fixedly arranged inside the flame retardant filling, a lower isolation sleeve is fixedly arranged at the bottom of the side protection sleeve, and flame retardant cotton is fixedly arranged inside the lower isolation sleeve.

[0011] Preferably, the sealing cover mechanism includes a protective cover, two second connecting blocks are fixedly provided on both sides of the protective cover, isolation cotton is fixedly provided at the lower end of the protective cover, two first connecting blocks are fixedly provided on both sides of the outer layer of the battery shell, and fixed blocks are fixedly provided on both sides of the outer layer of the battery shell at the bottom.

[0012] Preferably, a cable connector is provided through the front end of the outer layer of the battery shell, and two inner cables are fixedly provided at the rear end of the cable connector, and the two inner cables are connected to the battery body.

[0013] Preferably, sliding rods are fixedly provided at the four corners of the rear end opening of the outer layer of the battery housing, a windshield is slidably provided between the four sliding rods, and a return spring is fixedly provided between the windshield and the four sliding rods.

[0014] Preferably, an air valve is provided through the lower front end of the outer layer of the battery shell, a plurality of air pipe connectors are fixedly provided at the input end of the air valve, and the output end of the air valve is connected through and between the outer layer of the battery shell and the inner layer of the battery shell.

[0015] Preferably, the material of the side protective sleeve is a rubber composite material, the material of the flame retardant filler is perfluorohexanone, and the material of the expandable filler is expanded graphite.

[0016] Preferably, the material of the lower isolation sleeve is ceramic silicone rubber, and the material of the flame retardant cotton is melamine foam.

[0017] A hybrid electric vehicle comprises a heat pump air conditioner air outlet, a front air inlet, a rear air outlet, an engine and a motor;

[0018] The heat pump air conditioner is connected to the engine, the air outlet of the heat pump air conditioner and the front air inlet are both connected to the air pipe connector, and the motor is connected to the cable connector.

[0019] Working principle: In this battery pack, power supply can be achieved by connecting the motor and the electronic control system to the cable connector, and then two of the air pipe connectors are connected to the air outlet of the heat pump air conditioner, and the other two connectors are connected to the air inlet of the front of the vehicle. At this time, when the hybrid electric vehicle equipped with this battery pack is driving, it first relies on the engine as a driving force to achieve normal driving. Then the engine generates a lot of heat when it is working. At this time, the wind entering the engine will be heated and will enter the inside of the air valve under the action of the heat pump air conditioner. The air valve opens two of the channels to allow the wind to enter the inside of the outer layer of the battery shell. At this time, the hot air will flow between the outer layer of the battery shell and the inner layer of the battery shell, and will pass through the vents in the heat storage plate during the flow process, thereby heating the heat storage plate. At this time, the electronic control system obtains the temperature of the battery body in real time. When the temperature is normal, the air valve will be controlled to close to avoid the impact of continuous heating on the battery. When a higher temperature of the battery body is obtained, the air valve will open the other two channels so that the normal air entering the car can be blown onto the battery body to achieve the function of heat dissipation.

[0020] (III) Beneficial effects

[0021] The present invention provides a hybrid battery pack and a hybrid electric vehicle. The present invention provides the following beneficial effects:

[0022] 1. The present invention provides a hybrid battery pack and a hybrid electric vehicle. In the design of the battery pack, two ports of the air pipe connector can be connected to the air outlet of the heat pump air conditioner, and the other two ports can be connected to the front air inlet. During the driving process of the hybrid electric vehicle, the engine is first used as the main driving force to ensure normal driving. The heat generated by the engine when it is working will be absorbed by the surrounding air, and then under the action of the heat pump air conditioner, the heated air will enter the inside of the air valve. The air valve opens two channels to allow hot air to enter the outer space of the battery shell and flow between the inner and outer layers of the battery shell. During the flow process, the hot air will pass through the vent of the heat storage plate to heat the heat storage plate. This process does not require additional battery heating energy input, effectively improves energy utilization and reduces driving costs. The electronic control system will monitor the temperature of the battery body in real time. When the temperature remains within the normal range, the air valve will close to prevent excessive heating from damaging the battery. If it is detected that the temperature of the battery body is too high, the air valve will open the other two channels to allow air at normal temperature in the car to blow to the battery body to achieve heat dissipation function, thereby enhancing the practicality of the battery pack.

[0023] 2. The present invention provides a hybrid battery pack and a hybrid electric vehicle. In the design of this battery pack, the battery body is placed inside the protective mechanism. The protective sleeve on the inside of the protective mechanism adopts a rubber composite material that expands when heated and has flame retardant properties. This material is usually composed of multiple components and is a widely used flame retardant plasticizer. It can be used as a part of the outer jacket material to provide the necessary flame retardant properties. The expansion filling material uses expanded graphite, which can expand rapidly when heated and has an extremely high expansion rate. The flame retardant filling uses perfluorohexanone, which is a highly efficient fire extinguishing agent. The combination of these materials can, in the event of thermal runaway of the battery pack, through the physical action of the expansion material and the chemical action of the fire extinguishing material, the fire extinguishing material can be blasted open by the expansion material to extinguish the fire, effectively controlling the fire and temperature, thereby ensuring the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the axial side of the present invention;

[0025] Figure 2 This is an axial schematic diagram of the sealing cover mechanism of the present invention after opening;

[0026] Figure 3 It is a partial explosion schematic diagram of the present invention;

[0027] Figure 4 It is an axial schematic diagram of the battery fixing mechanism of the present invention;

[0028] Figure 5 It is a cross-sectional axial schematic diagram of the protection mechanism of the present invention;

[0029] Figure 6 It is an axial schematic diagram of the sealing cover mechanism of the present invention;

[0030] Figure 7 for Figure 4 An enlarged schematic diagram of point A.

[0031] Among them, 1. battery fixing mechanism; 2. sealing cover mechanism; 3. battery body; 4. protective mechanism; 101. heat storage plate; 102. first connecting block; 103. outer layer of battery shell; 104. inner layer of battery shell; 105. fixing block; 106. cable connector; 107. air valve; 108. air pipe connector; 109. inner cable; 110. vent; 111. wind shield; 112. reset spring; 113. sliding rod; 201. protective cover; 202. second connecting block; 203. isolation cotton; 401. side protective cover; 402. flame retardant filling; 403. expansion filling; 404. lower isolation cover; 405. flame retardant cotton. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-2 As shown, an embodiment of the present invention provides a hybrid battery pack, including a battery fixing mechanism 1, a sealing cover mechanism 2 is arranged on the upper end of the battery fixing mechanism 1, a protective mechanism 4 is fixedly arranged inside the battery fixing mechanism 1, a battery body 3 is fixedly arranged inside the protective mechanism 4, a hybrid electric vehicle, including a heat pump air-conditioning outlet, a front air inlet, a rear exhaust port, an engine and a motor, the heat pump air-conditioning is connected to the engine, the heat pump air-conditioning outlet and the front air inlet are both connected to the air pipe connector 108, and the motor is connected to the cable connector 106.

[0034] Specifically, in the above specific embodiment, in this battery pack, the user can connect the motor and the electronic control system to the cable connector 106 to realize the power supply operation of the battery pack. After completing the power supply connection, the two ports of the air pipe connector 108 need to be connected to the air outlet of the heat pump air conditioner, and the other two ports need to be connected to the air inlet at the front end of the vehicle. In this way, during normal driving, the vehicle can not only realize the heating function, but also effectively dissipate heat, thereby improving stability. In addition, the battery body 3 is placed in the protective mechanism 4. This protective measure greatly improves the safety of the battery pack during use and ensures the safety of the user during driving.

[0035] like Figure 2-4 As shown in Figure 7, the battery fixing mechanism 1 includes a battery shell outer layer 103, a battery shell inner layer 104 is fixedly arranged in the middle position inside the battery shell outer layer 103, a plurality of heat storage sheets 101 are fixedly arranged between the battery shell outer layer 103 and the battery shell inner layer 104, a plurality of vents 110 are penetrated inside the plurality of heat storage sheets 101, a cable connector 106 is penetrated at the upper front end of the battery shell outer layer 103, and two inner cables 109 are fixedly arranged at the rear end of the cable connector 106, and the two inner cables 109 are connected to The battery body 3 and the battery shell outer layer 103 are fixedly provided with sliding rods 113 at the four corners of the rear end opening, a windshield 111 is slidably provided between the four sliding rods 113, a return spring 112 is fixedly provided between the windshield 111 and the four sliding rods 113, an air valve 107 is penetrated at the lower front end of the battery shell outer layer 103, a plurality of air pipe connectors 108 are fixedly provided at the input end of the air valve 107, and the output end of the air valve 107 is penetrated and connected between the battery shell outer layer 103 and the battery shell inner layer 104;

[0036] Specifically, in the above specific embodiment, during the driving process of the hybrid electric vehicle, the engine will first be relied upon as the main driving force to ensure that the vehicle can travel normally. In this process, the engine will generate a large amount of heat when working. This heat will be absorbed by the air around the engine, causing the air temperature to rise. Subsequently, the heated air will enter the interior of the air valve 107 through the action of the heat pump air conditioner. At this time, the air valve 107 will open two of the channels, allowing the hot air to enter the outer layer of the battery housing.

[0037] When the hot air enters between the outer layer and the inner layer of the battery casing, it will pass through the vent 110 in the heat storage plate 101 during the flow. This process achieves effective heating of the heat storage plate 101. At the same time, the electronic control system will monitor the temperature of the battery body 3 in real time. If the electronic control system detects that the temperature of the battery body 3 is within the normal range, the air valve 107 will be closed to avoid unnecessary effects on the battery due to continuous heating. However, if the electronic control system detects that the temperature of the battery body 3 is high, the air valve 107 will open the other two channels. In this way, normal air entering the car can be blown directly onto the battery body 3, thereby achieving effective heat dissipation for the battery. In this way, the battery pack can be kept within the optimal operating temperature range during the driving of the hybrid electric vehicle, ensuring the performance and life of the battery.

[0038] like Figure 5 As shown, the protection mechanism 4 includes a side protection sleeve 401, a flame retardant filler 402 is fixedly arranged inside the side protection sleeve 401, an expansion filler 403 is fixedly arranged inside the flame retardant filler 402, a lower isolation sleeve 404 is fixedly arranged at the bottom of the side protection sleeve 401, and a flame retardant cotton 405 is fixedly arranged inside the lower isolation sleeve 404. The material of the side protection sleeve 401 is a rubber composite material, the material of the flame retardant filler 402 is perfluorohexanone, the material of the expansion filler 403 is expanded graphite, the material of the lower isolation sleeve 404 is ceramic silicone rubber, and the material of the flame retardant cotton 405 is melamine foam;

[0039] Specifically, in the above specific embodiment, the side protective sleeve 401 is selected from a rubber composite material that expands when exposed to heat and is flame retardant. This material usually contains multiple components, such as rubber, zinc oxide, a cross-linking agent, aluminum hydroxide, triphenyl phosphate, expanded graphite, and general carbon black. Among them, triphenyl phosphate Triphenyl Phosphate, TPP is a commonly used flame retardant plasticizer, which can be used as a part of the outer jacket material to provide flame retardant properties. The expansion filler 403 uses expanded graphite Expanded Graphite, EG, which is an excellent expansion material. It can expand rapidly when exposed to heat and has a very high expansion rate. Expanded graphite is obtained by special chemical treatment and high-temperature expansion of natural flake graphite. It has a porous structure and a high specific surface area and can expand rapidly when exposed to heat. The flame retardant filler 402 uses Perfluorohexanone, which is a highly efficient fire extinguishing agent. It has the characteristics of rapid fire extinguishing and environmental friendliness. Perfluorohexanone can quickly extinguish flames and reduce the surface temperature of the battery to a safe value. It is a very effective fire extinguishing material when the battery is in thermal runaway. The combination of these materials can effectively control the fire and temperature and protect the battery pack through the physical effect of the expansion material and the chemical effect of the fire extinguishing material when the battery pack is in thermal runaway. The lower isolation sleeve 404 is made of ceramic silicone rubber with ceramic fillers. This material has good high temperature resistance and can maintain stable shape and performance at high temperatures. It also has good insulation properties and effectively prevents electric shock accidents. It was originally used for fire protection of high-voltage cables, but it can also be used in isolation sleeves of battery packs to improve its fire safety. The flame retardant cotton 405 is made of melamine foam. When the battery is in thermal runaway, it can effectively block the spread of heat and limit the direction of the fire, which plays a role in blocking the chain reaction between the monomer cells and improves the fire resistance of the battery. Melamine foam has permanent flame retardancy UL 94V-0, HF-1, B1 grade, excellent thermal insulation thermal conductivity, 0.0 35W / (m*K), permanent insulation 1000VDC, withstand voltage 3000V DC, and wide weather resistance from -180 degrees Celsius to 200 degrees Celsius, up to 240 degrees Celsius, maintaining stable physical and chemical properties.

[0040] like Figure 1 , 2 As shown in FIG. 6 , the sealing cover mechanism 2 includes a protective cover 201, two second connecting blocks 202 are fixedly provided on both sides of the protective cover 201, an isolation cotton 203 is fixedly provided at the lower end of the protective cover 201, two first connecting blocks 102 are fixedly provided on both sides of the outer layer 103 of the battery shell, and fixed blocks 105 are fixedly provided on both sides of the outer layer 103 of the battery shell at the bottom;

[0041] Specifically, in the above-mentioned specific embodiment, the protective cover 201 and the first connecting block 102 and the second connecting block 202 are arranged so that they can be tightly connected with the battery fixing mechanism 1. During the connection process, the upper limit of the battery body 3 can be effectively protected by the isolation cotton 203, thereby greatly improving the stability of the overall structure. In addition, the battery fixing mechanism 1 can also be conveniently connected to the interior of the hybrid electric vehicle through the fixing block 105, making the installation process easier and faster. This design not only ensures the safety of the battery, but also improves the installation efficiency, providing a strong guarantee for the stable operation of the hybrid electric vehicle.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hybrid battery pack, comprising a battery fixing mechanism (1), characterized in that: A sealing cover mechanism (2) is arranged at the upper end of the battery fixing mechanism (1), a protection mechanism (4) is fixedly arranged inside the battery fixing mechanism (1), and a battery body (3) is fixedly arranged inside the protection mechanism (4); The battery fixing mechanism (1) comprises a battery shell outer layer (103), a battery shell inner layer (104) is fixedly arranged at a middle position inside the battery shell outer layer (103), a plurality of heat storage sheets (101) are fixedly arranged between the battery shell outer layer (103) and the battery shell inner layer (104), and a plurality of vents (110) are arranged through the plurality of heat storage sheets (101); The protection mechanism (4) comprises a side protection sleeve (401), a flame retardant filler (402) is fixedly arranged inside the side protection sleeve (401), an expansion filler (403) is fixedly arranged inside the flame retardant filler (402), a lower isolation sleeve (404) is fixedly arranged at the bottom of the side protection sleeve (401), and a flame retardant cotton (405) is fixedly arranged inside the lower isolation sleeve (404).

2. A hybrid battery pack according to claim 1, characterized in that: The sealing cover mechanism (2) comprises a protective cover (201), two second connection blocks (202) are fixedly arranged on both sides of the protective cover (201), an isolation cotton (203) is fixedly arranged at the lower end of the protective cover (201), two first connection blocks (102) are fixedly arranged on both sides of the battery shell outer layer (103), and fixed blocks (105) are fixedly arranged at the lower sides of both sides of the battery shell outer layer (103).

3. A hybrid battery pack according to claim 1, characterized in that: A cable connector (106) is provided through the front end of the outer layer (103) of the battery housing, and two inner cables (109) are fixedly provided at the rear end of the cable connector (106). The two inner cables (109) are connected to the battery body (3).

4. A hybrid battery pack according to claim 1, characterized in that: Sliding rods (113) are fixedly arranged at the four corners of the rear end opening of the battery housing outer layer (103), a windshield plate (111) is slidably arranged between the four sliding rods (113), and a return spring (112) is fixedly arranged between the windshield plate (111) and the four sliding rods (113).

5. The hybrid battery pack according to claim 1, characterized in that: An air valve (107) is provided through the front end of the battery housing outer layer (103), a plurality of air pipe connectors (108) are fixedly provided at the input end of the air valve (107), and an output end of the air valve (107) is connected through the battery housing outer layer (103) and the battery housing inner layer (104).

6. A hybrid battery pack according to claim 1, characterized in that: The material of the side protective sleeve (401) is a rubber composite material, the material of the flame retardant filler (402) is perfluorohexanone, and the material of the expansion filler (403) is expanded graphite.

7. A hybrid battery pack according to claim 1, characterized in that: The material of the lower isolation sleeve (404) is ceramic silicone rubber, and the material of the flame retardant cotton (405) is melamine foam.

8. A hybrid electric vehicle, characterized in that: The hybrid battery pack comprises any one of claims 1 to 8 above; the electric vehicle is provided with a heat pump air-conditioning outlet, a front air inlet, a rear exhaust outlet, an engine and a motor; The heat pump air conditioner is connected to the engine, the air outlet of the heat pump air conditioner and the front air inlet are both connected to the air pipe connector (108), and the motor is connected to the cable connector (106).

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