New energy battery pack with synergic hydrogen fuel battery and power battery

Abstract

The invention relates to a new energy battery pack with synergic hydrogen fuel battery and power battery applied to the related technical field of new energy batteries, a bidirectional uniform heat unit is arranged in a liquid-liquid heat transfer process, a solid heat conduction structure capable of continuously polymerizing and dispersing can be additionally arranged in the liquid-liquid heat transfer process, and the heat transfer efficiency is improved. Not only can the transverse heat transfer speed be effectively accelerated, but also the problem of slow heat conduction in the vertical direction can be effectively overcome, so that the response speed during low-temperature starting is effectively accelerated; moreover, the bidirectional uniform heat unit generates mechanical force during continuous dispersion and polymerization, and the mechanical force can be converted into electric energy to enable the heat increasing assembly to heat, so that the preheating speed of the power battery is accelerated, and the response speed of the battery pack during low-temperature starting is further improved under the condition of not additionally increasing energy consumption.

Description

Technical Field

[0001] A new energy battery pack with cooperation between a hydrogen fuel cell and a power battery according to the present invention, in particular, a new energy battery pack with cooperation between a hydrogen fuel cell and a power battery applied to the technical field related to new energy batteries. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of electrolyzing water. Hydrogen and oxygen are respectively supplied to the anode and the cathode. After hydrogen diffuses outward through the anode and reacts with the electrolyte, electrons are released and reach the cathode through an external load. In this process, hydrogen reacts with oxygen to generate water and produces electrical energy as a byproduct. By 2025, hydrogen fuel cells have been widely used in fields such as heavy fuel cell vehicles, spacecraft, data centers, and warehousing.

[0003] In the automotive field, a hydrogen fuel cell generally cooperates with a power battery to jointly provide power for the vehicle. However, this new energy battery pack has a problem of low-temperature startup. When the vehicle starts at low temperature, the fuel cell system works first. However, at low temperature, the hydrogen fuel cell needs to be preheated to generate electricity efficiently. It is generally preheated by a short-time high-voltage pulse, and then the waste heat of the hydrogen fuel cell is recovered and the power battery is preheated, so as to realize the overall preheating of the battery pack for easy low-temperature startup. For example, a low-temperature startup system and control method for a hydrogen fuel cell vehicle disclosed in the Chinese patent specification with publication number CN109473699A, and a high-efficiency low-temperature startup system for an extended-range fuel cell vehicle disclosed in the Chinese patent specification with publication number CN208411475U.

[0004] However, when recovering the waste heat of the hydrogen fuel cell to preheat the power battery, it is generally in the form of liquid-liquid heat transfer. On the one hand, the waste heat is limited at low temperature. On the other hand, a large amount of waste heat is lost during the transfer process at low temperature, resulting in low preheating efficiency and slow speed. As a result, at low temperature (about -30°C), the response speed of low-temperature startup is slow, which is not convenient for use. And during liquid-liquid heat transfer, when the coolant absorbing heat passes through the power battery, the lateral heat transfer is relatively fast along with the liquid flow, while the vertical heat transfer is relatively slow, which also leads to low preheating efficiency of the power battery and slow response speed. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that when preheating the power battery during low-temperature startup, the efficiency is low, resulting in a slow speed of low-temperature response.

[0006] To solve the above problems, the present invention provides a new energy battery pack with collaborative hydrogen fuel cell and power battery, including a hydrogen fuel cell and a power battery installed in a vehicle. The discharge end of the hydrogen fuel cell is electrically connected to the power battery, and the discharge end of the power battery is electrically connected to the vehicle motor. The cathode intake port of the hydrogen fuel cell is directly communicated with the external environment, and the anode intake port of the hydrogen fuel cell is connected to a hydrogen storage tank through a gas duct. A pressure stabilizing valve and a flow control valve are installed on the gas duct.

[0007] The hydrogen fuel cell and the power battery are externally provided with a temperature control unit. The temperature control unit includes a waste heat recovery sleeve wrapped around the hydrogen fuel cell and a passive preheating sleeve wrapped around the power battery. Coolant is filled in both the waste heat recovery sleeve and the passive preheating sleeve. A liquid guide pipe is connected between the water inlet of the passive preheating sleeve and the drain outlet of the waste heat recovery sleeve, and a liquid return pipe is connected between the drain outlet of the passive preheating sleeve and the water inlet of the waste heat recovery sleeve. A temperature sensor and a liquid flow meter are installed at the end of the liquid return pipe close to the drain outlet of the passive preheating sleeve. The passive preheating sleeve includes two power side rings and a circulation sleeve fixedly connected between the two power side rings. The circulation sleeve is a double-layer hollow structure, and the two ends of the double-layer structure of the circulation sleeve are respectively fixedly connected to the corresponding power side rings. The hollow part between the double-layer structures is a preheating cavity, and a two-way heat equalizing unit is arranged inside the preheating cavity. Electromagnetic sheets are fixedly embedded inside both power side rings, and the energized electromagnetic sheets generate magnetic suction forces on the two-way heat equalizing unit.

[0008] In the above new energy battery pack with collaborative hydrogen fuel cell and power battery, by setting a two-way heat equalizing unit during the liquid-liquid heat transfer process, a solid heat conduction structure that can continuously aggregate and disperse can be added during the liquid-liquid heat transfer process, which can not only effectively accelerate the horizontal heat transfer speed, but also effectively overcome the problem of slow heat conduction in the vertical direction, thereby effectively accelerating the response speed during low-temperature startup.

[0009] As a further improvement of the present application, both the liquid guide pipe and the liquid return pipe include an outer protective layer located on the outer layer, an inner sealing layer located on the inner layer, and a heat insulation layer filled between the outer protective layer and the inner sealing layer.

[0010] As a further improvement of the present application, the two-way heat equalizing unit includes a laminated heat transfer group, four transverse movement guide rods fixedly connected between the two power side rings, and a plurality of elastic ropes respectively fixedly connected between the left and right ends of the laminated heat transfer group and the corresponding power side rings. The transverse movement guide rods are of a rigid structure, and the transverse movement guide rods movably penetrate through the laminated heat transfer group. The elastic ropes are elastic structures resistant to high temperatures.

[0011] As a further improvement of the present application, the laminated heat transfer group includes a plurality of uniformly distributed heat transfer ring plates, multiple pairs of connecting ropes respectively fixedly connected to the middle parts of the upper and lower outer ends of the heat transfer ring plates, and a plurality of linkage ropes respectively fixedly connected between adjacent two connecting ropes. The linkage ropes are high-temperature resistant non-elastic structures, the connecting ropes are T-shaped structures, the heat transfer ring plates are made of metallic iron, and the two power side rings are not energized simultaneously.

[0012] As a further improvement of the present application, a plurality of uniformly distributed liquid passing holes are drilled at both the upper and lower ends of the heat transfer ring plates, and the liquid passing holes do not coincide with the transverse guiding rods.

[0013] As a further improvement of the present application, two partition plates are also fixedly connected inside the preheating chamber. The two partition plates are respectively located on both sides of the laminated heat transfer group, and both are located between the water inlet and the water outlet of the passive preheating sleeve.

[0014] As another improvement of the present application, a heat enhancement component is also provided between the laminated heat transfer group and the preheating chamber. The heat enhancement component includes a piezoelectric module arranged between the adjacent ends of two adjacent heat transfer ring plates close to each other and a heating wire fixedly embedded inside the inner layer structure of the circulation sleeve. A plurality of piezoelectric modules are respectively connected in parallel with the heating wire.

[0015] As a supplement to another improvement of the present application, the piezoelectric module does not coincide with the liquid passing holes, and the outer walls of the double-layer structure of the circulation sleeve are both wrapped with insulating layers.

[0016] In summary, by setting the bidirectional heat equalizing unit during the liquid-liquid heat transfer process, a solid heat conduction structure that can continuously aggregate and disperse can be added during the liquid-liquid heat transfer process, which can not only effectively accelerate the transverse heat transfer speed, but also effectively overcome the problem of slow heat conduction in the vertical direction, thereby effectively accelerating the response speed during low-temperature startup; moreover, the bidirectional heat equalizing unit generates mechanical force when continuously dispersing and aggregating, and this part of the mechanical force can be converted into electrical energy and make the heat enhancement component generate heat, thereby accelerating the preheating speed at the power battery, so as to further improve the response speed of the battery pack during low-temperature startup without additional energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the principle block diagram of the first embodiment of the present application;

[0018] Figure 2 is the three-dimensional schematic diagram of the temperature control unit of the first embodiment of the present application;

[0019] Figure 3 is the cross-sectional view of the liquid guide pipe of the first embodiment of the present application;

[0020] Figure 4 is the partial cross-sectional schematic diagram of the passive preheating sleeve of the first embodiment of the present application;

[0021] Figure 5 Partial cross-sectional view of the stacked heat transfer group of the first embodiment of the present application;

[0022] Figure 6 is Figure 5 Schematic diagram at position A in

[0023] Figure 7 Front view of the heat transfer ring sheet of the first embodiment of the present application;

[0024] Figure 8 Schematic diagram when the heat transfer ring sheets of the first embodiment of the present application gather towards the drain port side;

[0025] Figure 9 Schematic diagram when the heat transfer ring sheets of the first embodiment of the present application gather towards the water inlet side;

[0026] Figure 10 Cross-sectional schematic diagram when an isolation sheet is arranged in the preheating cavity of the first embodiment of the present application;

[0027] Figure 11 Partial cross-sectional view of the stacked heat transfer group of the second embodiment of the present application;

[0028] Figure 12 Partial cross-sectional view of the preheating cavity of the second embodiment of the present application;

[0029] Explanation of the markings in the figure:

[0030] 1 Hydrogen fuel cell, 2 Power battery, 3 Waste heat recovery sleeve, 4 Passive preheating sleeve, 41 Power side ring, 42 Circulation sleeve, 401 Isolation sheet, 402 Preheating cavity, 403 Heating wire, 51 Liquid guide pipe, 52 Liquid return pipe, 511 Outer protective layer, 512 Inner sealing layer, 513 Heat insulation interlayer, 6 Transverse guiding rod, 7 Stacked heat transfer group, 71 Heat transfer ring sheet, 72 Linking rope, 73 Linking rope strip, 701 Liquid passing hole, 8 Elastic rope, 9 Piezoelectric module. Specific embodiments

[0031] The following will describe in detail the two embodiments of the present application with reference to the accompanying drawings.

[0032] The first embodiment:

[0033] Figure 1It is shown that a new energy battery pack with a hydrogen fuel cell cooperating with a power battery includes a hydrogen fuel cell 1 and a power battery 2 installed in a vehicle. The discharge end of the hydrogen fuel cell 1 is electrically connected to the power battery 2, and the discharge end of the power battery 2 is electrically connected to the vehicle motor. The air inlet of the cathode end of the hydrogen fuel cell 1 is directly communicated with the external environment. During use, the external air enters the hydrogen fuel cell 1 along this air inlet to realize the supply of oxygen. The air inlet of the anode end of the hydrogen fuel cell 1 is connected with a hydrogen storage tank through a gas conduit. The hydrogen storage tank is used to store hydrogen, and hydrogen can be replenished through a gas filling station. A pressure stabilizing valve and a flow control valve are installed on the gas conduit to control the gas supply volume and the stability of gas supply when supplying hydrogen, thereby effectively ensuring the stability of this battery pack during use.

[0034] As Figure 2 , a temperature control unit is sleeved outside the hydrogen fuel cell 1 and the power battery 2. The temperature control unit includes a waste heat recovery sleeve 3 wrapped outside the hydrogen fuel cell 1 and a passive preheating sleeve 4 wrapped outside the power battery 2. Coolant is filled in both the waste heat recovery sleeve 3 and the passive preheating sleeve 4. A liquid guide pipe 51 is connected between the water inlet of the passive preheating sleeve 4 and the drain outlet of the waste heat recovery sleeve 3, and a liquid return pipe 52 is connected between the drain outlet of the passive preheating sleeve 4 and the water inlet of the waste heat recovery sleeve 3. A temperature sensor and a liquid flowmeter are installed at the end of the liquid return pipe 52 near the drain outlet of the passive preheating sleeve 4. Both the liquid guide pipe 51 and the liquid return pipe 52 include an outer protective layer 511 located on the outer layer, an inner sealing layer 512 located on the inner layer, and a heat insulation layer 513 filled between the outer protective layer 511 and the inner sealing layer 512. Among them, the outer protective layer 511 serves as the outer protective layer, and the heat insulation layer 513 is used to reduce the influence of the external environment temperature on the temperature of the coolant in the liquid guide pipe 51 and the liquid return pipe 52.

[0035] It should be noted that during the driving of the vehicle, the coolant can assist in the heat dissipation of the hydrogen fuel cell 1 and the power battery 2. During low-temperature startup, the coolant can absorb the waste heat on the hydrogen fuel cell 1 and conduct heat transfer, thereby preheating the power battery 2 at low temperature.

[0036] As Figure 4, the passive preheating sleeve 4 includes two power side rings 41 and a circulation sleeve 42 fixedly connected between the two power side rings 41. The circulation sleeve 42 is a double-layer hollow structure, and both ends of the double-layer structure of the circulation sleeve 42 are fixedly connected to the corresponding power side rings 41 respectively. The hollow part between the double-layer structures is the preheating chamber 402. A two-way heat equalizing unit is arranged inside the preheating chamber 402. The two-way heat equalizing unit includes a stacked heat transfer group 7, four transverse guiding rods 6 fixedly connected between the two power side rings 41, and a plurality of elastic ropes 8 respectively fixedly connected between the left and right ends of the stacked heat transfer group 7 and the corresponding power side rings 41. The transverse guiding rods 6 are of rigid structure and the transverse guiding rods 6 movably penetrate through the stacked heat transfer group 7. The elastic ropes 8 are elastic structures resistant to high temperatures. Electromagnetic sheets are fixedly embedded inside both of the two power side rings 41, and the energized electromagnetic sheets generate magnetic suction forces on the two-way heat equalizing unit. When starting at low temperature, when the liquid flowmeter at the drain port of the passive preheating sleeve 4 detects that there is liquid passing by, such as Figure 8 , the electromagnetic sheet on the side far from the water inlet of the passive preheating sleeve 4 can be controlled to be turned on, which generates a magnetic suction force on the stacked heat transfer group 7. At this time, the stacked heat transfer group 7 that has absorbed more heat on the water inlet side can quickly gather towards the drain port side, such as Figure 9 , and then control the other electromagnetic sheet to be energized, so that the stacked heat transfer group 7 moves towards the water inlet side with a higher temperature to quickly absorb heat and then transfer it to the drain port side. By continuously repeating the above process, not only can the lateral heat diffusion be accelerated, but also the temperature difference between the water inlet and the drain port of the passive preheating sleeve 4 can be reduced, thereby effectively accelerating the uniform preheating and preheating speed of the power battery 2. And due to the metal material of the stacked heat transfer group 7, its thermal conductivity is relatively high, and its cross-section is directly in contact with the inner surface of the passive preheating sleeve 4, so that part of the heat can be quickly transferred in the vertical direction, thereby effectively overcoming the problem that the heat conduction efficiency in the vertical direction is relatively poor.

[0037] That is, by setting a two-way heat equalizing unit during the liquid-liquid heat transfer process, a solid heat conduction structure that can continuously aggregate and disperse can be added during the liquid-liquid heat transfer process, which can not only effectively accelerate the lateral heat transfer speed, but also effectively overcome the problem of slow heat conduction in the vertical direction, thereby effectively accelerating the response speed during low-temperature startup.

[0038] Such as Figure 5-6 , the stacked heat transfer group 7 includes a plurality of uniformly distributed heat transfer ring sheets 71, a plurality of pairs of connecting ropes 73 respectively fixedly connected to the middle parts of the upper and lower outer ends of the heat transfer ring sheets 71, and a plurality of linkage ropes 72 respectively fixedly connected between adjacent two connecting ropes 73. The heat transfer ring sheets 71 are made of metallic iron. The two power side rings 41 are not energized simultaneously, which effectively ensures the stable aggregation and dispersion of one side of the plurality of heat transfer ring sheets 71, and thus effectively ensures stable heat transfer, such as Figure 7, a plurality of uniformly distributed liquid passing holes 701 are drilled at both the upper and lower ends of the heat transfer ring piece 71. The liquid passing holes 701 do not coincide with the transverse guide rod 6. Through the liquid passing holes 701, the coolant can flow smoothly between the plurality of heat transfer ring pieces 71 and penetrate through.

[0039] It should be noted that the positions of the liquid passing holes 701 on the plurality of heat transfer ring pieces 71 coincide, so that whether the plurality of heat transfer ring pieces 71 are dispersed or aggregated, the movement process of the coolant from the water inlet side to the water outlet side is not easily interrupted.

[0040] The linkage rope 72 is a non-elastic structure resistant to high temperature, and the connecting rope strip 73 is a T-shaped structure. When both electromagnetic sheets are in the non-powered state, the two elastic ropes 8 recover their elasticity. At this time, the plurality of heat transfer ring pieces 71 can be located in the middle of the preheating cavity 402 and in a relatively uniform distribution state. At the same time, when subjected to magnetic suction force on one side, due to the non-elasticity of the linkage rope 72, the plurality of heat transfer ring pieces 71 have a good force response. When subjected to magnetic suction force, they can gather towards the stressed side relatively stably and continuously in sequence.

[0041] In addition, the maximum span of the connecting rope strip 73 is less than the span of the heat transfer ring piece 71, so that the two connecting rope strips 73 are not likely to affect the aggregation of two adjacent heat transfer ring pieces 71.

[0042] Such as Figure 10 , two isolation sheets 401 are also fixedly connected inside the preheating cavity 402. The two isolation sheets 401 are respectively located on both sides of the stacked heat transfer group 7, and both are located between the water inlet and the water outlet of the passive preheating sleeve 4. When the plurality of heat transfer ring pieces 71 gather together on one side, it is not easy to block the water inlet or the water outlet on that side, further ensuring the stable circulation of the coolant in the passive preheating sleeve 4.

[0043] The second implementation mode:

[0044] On the basis of the first implementation mode, this implementation mode adds a heat increasing component, and the rest is the same as the first implementation mode.

[0045] Figure 11-12It is shown that a heat increasing component is further arranged between the laminated heat transfer group 7 and the preheating cavity 402. The heat increasing component includes a piezoelectric module 9 arranged between the adjacent ends of two adjacent heat transfer ring plates 71 close to each other and a heating wire 403 fixedly embedded in the inner structure of the circulating sleeve 42. A plurality of piezoelectric modules are respectively connected in parallel with the heating wire 403. The piezoelectric module 9 does not coincide with the liquid passing hole 701. Insulating layers are wrapped on the outer walls of the double-layer structure of the circulating sleeve 42. When a plurality of heat transfer ring plates 71 gather towards one side, the plurality of heat transfer ring plates 71 will gradually collide and squeeze when approaching each other in sequence, thereby generating an electric current in the piezoelectric module 9, so that the heating wire 403 is energized and generates heat. Moreover, the sequential collision of the plurality of heat transfer ring plates 71 during aggregation will prolong the energization duration of the heating wire 403, thereby generating more heat during the one-time aggregation of the plurality of heat transfer ring plates 71, and thus making the preheating effect on the power battery 2 better and accelerating the response speed during low-temperature startup.

[0046] Moreover, the two-way heat equalizing unit generates mechanical force during continuous dispersion and aggregation. This part of the mechanical force can be converted into electric energy and make the heat increasing component generate heat, thereby accelerating the preheating speed at the power battery 2. Compared with the first embodiment, it can further improve the response speed of the battery pack during low-temperature startup without additional energy consumption.

[0047] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application does not limit the protection scope thereto. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A new energy battery pack with coordinated operation of a hydrogen fuel cell and a power battery, characterized in that: It includes a hydrogen fuel cell (1) and a power battery (2) installed in a vehicle. The discharge end of the hydrogen fuel cell (1) is electrically connected to the power battery (2), the discharge end of the power battery (2) is electrically connected to a vehicle motor, the air inlet of the cathode end of the hydrogen fuel cell (1) is directly communicated with the external environment, the air inlet of the anode end of the hydrogen fuel cell (1) is connected with a hydrogen storage tank through a gas pipe, and a pressure stabilizing valve and a flow control valve are installed on the gas pipe; The hydrogen fuel cell (1) and the power battery (2) are externally provided with a temperature control unit. The temperature control unit includes a waste heat recovery sleeve (3) wrapped outside the hydrogen fuel cell (1) and a passive preheating sleeve (4) wrapped outside the power battery (2). Coolant is filled in both the waste heat recovery sleeve (3) and the passive preheating sleeve (4). A liquid guide pipe (51) is connected between the water inlet of the passive preheating sleeve (4) and the drain outlet of the waste heat recovery sleeve (3), and a liquid return pipe (52) is connected between the drain outlet of the passive preheating sleeve (4) and the water inlet of the waste heat recovery sleeve (3). A temperature sensor and a liquid flow meter are installed at the end of the liquid return pipe (52) close to the drain outlet of the passive preheating sleeve (4). The passive preheating sleeve (4) includes two power side rings (41) and a circulation sleeve (42) fixedly connected between the two power side rings (41). The circulation sleeve (42) is a double-layer hollow structure, and both ends of the double-layer structure of the circulation sleeve (42) are fixedly connected to the corresponding power side rings (41). The hollow part between the double-layer structures is a preheating cavity (402). A two-way heat equalizing unit is arranged inside the preheating cavity (402). Electromagnetic sheets are fixedly embedded inside both of the two power side rings (41), and the energized electromagnetic sheets generate magnetic suction forces on the two-way heat equalizing unit.

2. The new energy battery pack with cooperation of a hydrogen fuel cell and a power battery according to claim 1, wherein: Both the liquid guide pipe (51) and the liquid return pipe (52) include an outer protective layer (511) located on the outer layer, an inner sealing layer (512) located on the inner layer, and a heat insulation interlayer (513) filled between the outer protective layer (511) and the inner sealing layer (512).

3. The new energy battery pack with cooperation between a hydrogen fuel cell and a power battery according to claim 1, wherein: The two-way heat equalizing unit includes a stacked heat transfer group (7), four transverse guiding rods (6) fixedly connected between the two power side rings (41), and a plurality of elastic ropes (8) respectively fixedly connected between the left and right ends of the stacked heat transfer group (7) and the corresponding power side rings (41). The transverse guiding rods (6) are of a rigid structure and the transverse guiding rods (6) movably penetrate through the stacked heat transfer group (7). The elastic ropes (8) are elastic structures resistant to high temperatures.

4. The new energy battery pack with cooperation of a hydrogen fuel cell and a power battery according to claim 3, wherein: The stacked heat transfer group (7) includes a plurality of uniformly distributed heat transfer ring sheets (71), a plurality of pairs of connecting rope strips (73) respectively fixedly connected to the middle parts of the upper and lower outer ends of the heat transfer ring sheets (71), and a plurality of linkage ropes (72) respectively fixedly connected between adjacent two connecting rope strips (73). The linkage ropes (72) are non-elastic structures resistant to high temperatures. The connecting rope strips (73) are of a T-shaped structure. The heat transfer ring sheets (71) are made of metallic iron. The two power side rings (41) are not energized simultaneously.

5. The new energy battery pack with cooperation between a hydrogen fuel cell and a power battery according to claim 4, characterized in that: A plurality of uniformly distributed liquid passing holes (701) are drilled at both the upper and lower ends of the heat transfer ring piece (71), and the liquid passing holes (701) do not coincide with the transverse guide rod (6).

6. The new energy battery pack with cooperation between a hydrogen fuel cell and a power battery according to claim 4, characterized in that: Two partition plates (401) are fixedly connected inside the preheating cavity (402). The two partition plates (401) are respectively located on both sides of the laminated heat transfer group (7), and both are located between the water inlet and the water outlet of the passive preheating sleeve (4).

7. The new energy battery pack with cooperation between a hydrogen fuel cell and a power battery according to claim 6, characterized in that: A heat increasing component is further arranged between the laminated heat transfer group (7) and the preheating cavity (402). The heat increasing component includes a piezoelectric module (9) arranged between the adjacent ends of two adjacent heat transfer ring pieces (71) close to each other and a heating wire (403) fixedly embedded inside the inner layer structure of the circulation sleeve (42). A plurality of the piezoelectric modules (9) are respectively connected in parallel with the heating wire (403).

8. The new energy battery pack with cooperation of a hydrogen fuel cell and a power battery according to claim 7, characterized in that: The piezoelectric module (9) does not coincide with the liquid passing hole (701), and insulating layers are wrapped on the outer walls of the double-layer structure of the circulation sleeve (42).

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