Arrangement structure of bleeder resistor in hydrogen fuel cell system
By arranging a discharge resistor in the DCDC converter of the hydrogen fuel cell system, and using a relay to control the current to release the residual hydrogen energy, the damage problem of residual hydrogen to the stack is solved, and compatibility between insulation and vibration environment is achieved.
Patent Information
- Application Number
- CN202421823803.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-30
AI Technical Summary
After the existing hydrogen fuel cell system is stopped from working, the residual hydrogen cannot be effectively released, which may cause stack damage.
A discharge resistor is arranged in the DCDC converter of the hydrogen fuel cell system, and the current input discharge resistor is controlled through a relay to heat it up and release residual hydrogen energy.
It effectively avoids damage to the stack by residual hydrogen, meets the insulation requirements of the on-board vibration environment, and is compatible with two types of drainage resistance arrangement methods, parallel and series.
Smart Images
Figure CN223161643U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle-mounted power supplies, in particular to an arrangement structure of a discharge resistor in a hydrogen fuel cell system. Background Art
[0002] Hydrogen energy is one of the new energy sources most promising to become the next-generation pillar energy, and the hydrogen fuel cell with the advantages of cleanness and high efficiency is the most ideal form of hydrogen energy utilization in the 21st century. In a new energy vehicle powered by a hydrogen fuel cell, the main DC / DC converter is used to output the energy of the hydrogen stack to the DC bus. After the system stops working, there is a certain amount of residual hydrogen (leftover hydrogen) in the stack, and the DC / DC converter needs to release the energy generated by the reaction of the leftover hydrogen within a certain time to avoid damage to the stack caused by the leftover hydrogen. Content of the Utility Model
[0003] The main purpose of the utility model is to provide an arrangement structure of a discharge resistor in a hydrogen fuel cell system, aiming to avoid damage to the stack caused by leftover hydrogen.
[0004] To achieve the above purpose, the utility model provides an arrangement structure of a discharge resistor in a hydrogen fuel cell system, including: the arrangement structure of the discharge resistor in the hydrogen fuel cell system is arranged in the DCDC converter of the hydrogen fuel system. The arrangement structure of the discharge resistor in the hydrogen fuel cell system includes a housing, and at least one discharge resistor is arranged on the housing. One end of the discharge resistor is connected to the positive electrode of the main input of the DCDC converter, and the other end is connected to the negative electrode of the main input of the DCDC converter. When there is residual energy in the stack that needs to be released, the current is controlled by a relay to input into the discharge resistor, so that the discharge resistor generates heat.
[0005] A further technical solution of the utility model is that there are two discharge resistors: a first discharge resistor and a second discharge resistor.
[0006] A further technical solution of the utility model is that the arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a first plastic insulating plate, an insulating sheet, a second plastic insulating plate, a third plastic insulating plate, a plastic insulating sheet, a metal pressing sheet, a nut, a first plastic insulating cylinder, a second plastic insulating cylinder and a screw;
[0007] The first plastic insulating plate, the insulating sheet, the second plastic insulating plate, the third plastic insulating plate, the plastic insulating sheet and the metal pressing sheet are sequentially arranged on the housing from bottom to top. The first discharge resistor and the second discharge resistor are arranged between the second plastic insulating plate and the third plastic insulating plate from bottom to top. The screw passes through the first discharge resistor and the second discharge resistor. The first plastic insulating cylinder and the second plastic insulating cylinder are sleeved on the screw from bottom to top. The screw is fixed to the housing through the nut.
[0008] A further technical solution of the present utility model is that the arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a nut, a flat washer, a nut, and a spring washer, and the nut flat washer and the nut spring washer are arranged between the metal pressing sheet and the nut from bottom to top.
[0009] A further technical solution of the present utility model is that the arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a first negative copper busbar and an insulating column, one end of the insulating column is connected to the housing, and the other end is connected to the first negative copper busbar.
[0010] A further technical solution of the present utility model is that the first discharge resistor and the discharge resistor are arranged in parallel between the second plastic insulating plate and the third plastic insulating plate.
[0011] A further technical solution of the present utility model is that the arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes a second negative copper busbar, a positive copper busbar, and a third negative copper busbar; the third negative copper busbar is arranged at the bottom of the first discharge resistor, the first negative copper busbar is arranged at the top of the second discharge resistor, the second negative copper busbar connects the first negative copper busbar and the third negative copper busbar, and the positive copper busbar is arranged between the first discharge resistor and the second discharge resistor.
[0012] A further technical solution of the present utility model is that the first discharge resistor and the discharge resistor are arranged in series between the second plastic insulating plate and the third plastic insulating plate.
[0013] A further technical solution of the present utility model is that the arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes a first negative copper busbar and a positive copper busbar, the top of the first discharge resistor is in contact with the bottom of the second discharge resistor, the positive copper busbar is arranged at the bottom of the first discharge resistor, and the first negative copper busbar is arranged at the top of the second discharge resistor.
[0014] The present utility model fixes the cylindrical discharge resistor in the DCDC converter well, meets the harsh vibration environment of the vehicle, and also meets the insulation requirements. In addition, the present utility model also well accommodates two discharge resistor arrangement methods of parallel connection and series connection. Description of the Drawings
[0015] Figure 1 Schematic diagram of the structure when the first discharge resistor and the second discharge resistor in the arrangement structure of the discharge resistor in the hydrogen fuel cell system of the present utility model are connected in parallel;
[0016] Figure 2It is a cross-sectional view when the first discharge resistor and the second discharge resistor are connected in parallel in the arrangement structure of the discharge resistor in the hydrogen fuel cell system of the present utility model:
[0017] Figure 3 It is a schematic exploded view when the first discharge resistor and the second discharge resistor are connected in parallel in the arrangement structure of the discharge resistor in the hydrogen fuel cell system of the present utility model;
[0018] Figure 4 Schematic diagram of the structure when the first discharge resistor and the second discharge resistor are connected in series in the arrangement structure of the discharge resistor in the hydrogen fuel cell system of the present utility model;
[0019] Figure 5 It is a cross-sectional view when the first discharge resistor and the second discharge resistor are connected in series in the arrangement structure of the discharge resistor in the hydrogen fuel cell system of the present utility model;
[0020] Figure 6 It is a schematic exploded view when the first discharge resistor and the second discharge resistor are connected in series in the arrangement structure of the discharge resistor in the hydrogen fuel cell system of the present utility model.
[0021] Explanation of the reference numerals in the drawings:
[0022] Shell 1; Second plastic insulating plate 2; Positive copper busbar 3; Insulating sheet 4; Insulating column 5; Second negative copper busbar 6; First negative copper busbar 7; Nut 8; Third plastic insulating plate 9; Metal pressing sheet 10; Glue insulating sheet 11; Screw rod 12; First plastic insulating cylinder 13; Second plastic insulating cylinder 14; Nut flat washer 15; Nut spring washer 16; First discharge resistor 17; Second discharge resistor 18; First plastic insulating plate 19; Third negative copper busbar 20.
[0023] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. Specific embodiments
[0024] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0025] Please refer to Figures 1 to 6, the present utility model proposes an arrangement structure of a discharge resistor in a hydrogen fuel cell system. A preferred embodiment of the present utility model includes: the arrangement structure of the discharge resistor in the hydrogen fuel cell system is arranged in the DCDC converter of the hydrogen fuel system. The arrangement structure of the discharge resistor in the hydrogen fuel cell system includes a housing 1, and at least one discharge resistor is arranged on the housing 1. The discharge resistor is arranged between the positive and negative poles of the input end of the DCDC converter. One end of the discharge resistor is connected to the positive pole of the main input of the DCDC converter, and the other end is connected to the negative pole of the main input of the DCDC converter. When there is residual energy in the fuel cell stack that needs to be released, the relay controls the current to input into the discharge resistor from the copper bar, causing the discharge resistor to heat up.
[0026] As an implementation scheme, in this embodiment, there are two discharge resistors: a first discharge resistor 17 and a second discharge resistor 18, and the first discharge resistor 17 and the second discharge resistor 18 are cylindrical.
[0027] In this embodiment, the arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a first plastic insulating plate 19, an insulating sheet 4, a second plastic insulating plate 2, a third plastic insulating plate 9, a plastic insulating sheet 11, a metal pressing sheet 10, a nut 8, a first plastic insulating cylinder 13, a second plastic insulating cylinder 14, and a screw rod 12.
[0028] The first plastic insulating plate 19, the insulating sheet 4, the second plastic insulating plate 2, the third plastic insulating plate 9, the plastic insulating sheet 11, and the metal pressing sheet 10 are sequentially arranged on the housing 1 from bottom to top. The first discharge resistor 17 and the second discharge resistor 18 are arranged between the second plastic insulating plate 2 and the third plastic insulating plate 9 from bottom to top. The screw rod 12 passes through the first discharge resistor 17 and the second discharge resistor 18. The first plastic insulating cylinder 13 and the second plastic insulating cylinder 14 are sleeved on the screw rod from bottom to top, and the screw rod is fixed to the housing 1 through the nut 8.
[0029] The arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a nut flat washer 15 and a nut spring washer 16, and the nut flat washer 15 and the nut spring washer 16 are arranged between the metal pressing sheet 10 and the nut 8 from bottom to top.
[0030] The arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a first negative copper bar 7 and an insulating column 5. One end of the insulating column 5 is connected to the housing 1, and the other end is connected to the first negative copper bar 7.
[0031] Please refer to Figures 1 to 3, as an implementation, in this embodiment, the first discharge resistor 17 and the discharge resistor are arranged in parallel between the second plastic insulating plate 2 and the third plastic insulating plate 9.
[0032] The layout structure of the discharge resistor in the hydrogen fuel cell system further includes a second negative copper bus 6, a positive copper bus 3, and a third negative copper bus 20; the third negative copper bus 20 is arranged at the bottom of the first discharge resistor 17, the second negative copper bus 6 connects the first negative copper bus 7 and the third negative copper bus 20, and the positive copper bus 3 is arranged between the first discharge resistor 17 and the second discharge resistor 18.
[0033] In this implementation, the screw 12 is used to connect the components, and the sampling screw fixes the whole on the housing 1 through the fixing holes on the housing 1 and the first plastic insulating plate 19. The first negative copper bus 7 and the second negative copper bus 6 are overlapped by screws. There is a fixing hole arranged on the first negative copper bus 7 and it is fixed on the insulating column 5 by bolts. The insulating column 5 is fixed on the housing 1 through studs.
[0034] Please refer to Figures 4 to 6 , as another implementation, in this embodiment, the first discharge resistor 17 and the discharge resistor are arranged in series between the second plastic insulating plate 2 and the third plastic insulating plate 9.
[0035] The layout structure of the discharge resistor in the hydrogen fuel cell system further includes a first negative copper bus 7 and a positive copper bus 3. The top of the first discharge resistor 17 is in contact with the bottom of the second discharge resistor 18. The positive copper bus 3 is arranged at the bottom of the first discharge resistor 17, and the first negative copper bus 7 is arranged at the top of the second discharge resistor 18.
[0036] The structure of the first discharge resistor 17 and the discharge resistor arranged in series is roughly the same as the structure arranged in parallel. The difference is that there is only one positive copper bus 3 and one negative copper bus, which are respectively overlapped at both ends of the two discharge resistors, and the two discharge resistors are in contact with each other, thus realizing the series connection of the two discharge resistors.
[0037] The utility model fixes the cylindrical discharge resistor well in the DCDC converter, meets the harsh vibration environment of the vehicle, and also meets the insulation requirements. In addition, the utility model also well accommodates two discharge resistor layout methods of parallel connection and series connection.
[0038] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structure or process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.
Claims
1. An arrangement structure of a discharge resistor in a hydrogen fuel cell system, characterized in that, Including: The arrangement structure of the discharge resistor in the hydrogen fuel cell system is arranged in the DCDC converter of the hydrogen fuel system. The arrangement structure of the discharge resistor in the hydrogen fuel cell system includes a housing, and at least one discharge resistor is arranged on the housing. One end of the discharge resistor is connected to the positive pole of the main input of the DCDC converter, and the other end is connected to the negative pole of the main input of the DCDC converter. When there is residual energy in the fuel cell stack that needs to be released, the relay controls the current to input into the discharge resistor, causing the discharge resistor to heat up.
2. The layout structure of the discharge resistor in the hydrogen fuel cell system according to claim 1, characterized in that There are two discharge resistors: the first discharge resistor and the second discharge resistor.
3. The layout structure of the discharge resistor in the hydrogen fuel cell system according to claim 2, wherein, The arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a first plastic insulating plate, an insulating sheet, a second plastic insulating plate, a third plastic insulating plate, a plastic insulating sheet, a metal pressing sheet, a nut, a first plastic insulating cylinder, a second plastic insulating cylinder, and a screw; The first plastic insulating plate, the insulating sheet, the second plastic insulating plate, the third plastic insulating plate, the plastic insulating sheet, and the metal pressing sheet are sequentially arranged on the housing from bottom to top. The first discharge resistor and the second discharge resistor are arranged between the second plastic insulating plate and the third plastic insulating plate from bottom to top. The screw passes through the first discharge resistor and the second discharge resistor. The first plastic insulating cylinder and the second plastic insulating cylinder are sleeved on the screw from bottom to top. The screw is fixed to the housing through the nut.
4. The arrangement structure of the discharge resistor in the hydrogen fuel cell system according to claim 3, characterized in that, The arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a nut flat washer and a nut spring washer. The nut flat washer and the nut spring washer are arranged between the metal pressing sheet and the nut from bottom to top.
5. The arrangement structure of the discharge resistor in the hydrogen fuel cell system according to claim 4, characterized in that, The arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes: a first negative copper busbar and an insulating column. One end of the insulating column is connected to the housing, and the other end is connected to the first negative copper busbar.
6. The arrangement structure of the discharge resistor in the hydrogen fuel cell system according to claim 5, characterized in that, The first discharge resistor and the discharge resistor are arranged in parallel between the second plastic insulating plate and the third plastic insulating plate.
7. The arrangement structure of the discharge resistor in the hydrogen fuel cell system according to claim 6, characterized in that The arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes a second negative copper busbar, a positive copper busbar, and a third negative copper busbar; the third negative copper busbar is arranged at the bottom of the first discharge resistor, the first negative copper busbar is arranged at the top of the second discharge resistor, the second negative copper busbar connects the first negative copper busbar and the third negative copper busbar, and the positive copper busbar is arranged between the first discharge resistor and the second discharge resistor.
8. The arrangement structure of the discharge resistor in the hydrogen fuel cell system according to claim 5, characterized in that The first discharge resistor and the discharge resistor are arranged in series between the second plastic insulating plate and the third plastic insulating plate.
9. The layout structure of the discharge resistor in the hydrogen fuel cell system according to claim 8, wherein, The arrangement structure of the discharge resistor in the hydrogen fuel cell system further includes a first negative copper busbar and a positive copper busbar. The top of the first discharge resistor is in contact with the bottom of the second discharge resistor. The positive copper busbar is arranged at the bottom of the first discharge resistor, and the first negative copper busbar is arranged at the top of the second discharge resistor.