CN114792833A

CN114792833A - High-voltage assembly, fuel cell module and vehicle

Info

Publication number: CN114792833A
Application number: CN202210299587.5A
Authority: CN
Inventors: 谢俊; 陶春勇; 蒋文彬; 闫德阳; 张平平
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-26
Anticipated expiration: 2042-03-25
Also published as: CN114792833B

Abstract

The invention discloses a high-voltage component, a fuel cell module and a vehicle, which solve the problems that the output power of the fuel cell module is limited and the high-voltage design and assembly process is complex and limited in the prior art. The high-voltage component comprises a copper bar component, a positive output terminal, a negative output terminal, a positive connecting piece and a negative connecting piece; the copper bar assembly is used for connecting the output electrodes of the galvanic piles in series and forming a positive electrode connecting part and a negative electrode connecting part; the positive electrode output terminal is connected with the positive electrode connecting part through a positive electrode connecting piece, and the positive electrode connecting piece and the positive electrode output terminal are arranged at an angle; the negative electrode output terminal is connected with the negative electrode connecting part through the negative electrode connecting piece, and the negative electrode connecting piece and the negative electrode output terminal are arranged at an angle. Realize the integration of two galvanic piles on the one hand, realize the technological effect that power promoted, on the other hand passes through positive pole connecting piece and negative pole connecting piece and accomplishes the connection from the side of high pressure through terminal, has solved the problem of assembly equipment, makes assembly process simple, nimble, and high-pressure design is stable.

Description

High-voltage assembly, fuel cell module and vehicle

Technical Field

The invention relates to the technical field of fuel cells, in particular to a high-voltage assembly, a fuel cell module and a vehicle.

Background

The fuel cell stack is generally formed by connecting a plurality of single cells consisting of membrane electrodes and bipolar plates in series, wherein a seal ring is arranged between the membrane electrodes and the bipolar plates, and the two ends of the single cells are compressed, insulated and output current through end plates, insulating plates, current collecting plates and the like. The output voltage of the fuel cell stack is high; meanwhile, the membrane electrode of the fuel cell module has large active area, high working current density and large output current. In recent years, as the demand of a fuel cell module automobile for the output power of a fuel cell module is gradually increased, the output voltage and the output current of a fuel cell stack are also gradually increased; on the other hand, the electrical safety requirements of the fuel cell module automobile on the fuel cell stack are gradually increased due to the safety requirements of the whole automobile. The high voltage design inside the fuel cell stack therefore requires full consideration of electrical safety. Meanwhile, the fuel cell module needs to fully consider the checking of the electrical clearance and the creepage distance and the related insulation design due to the small space.

However, the fuel cell stack in the prior art has the following two technical problems: one, the output power of the prior art fuel cell module is limited due to the limited number of individual cells connected in series by a single stack; secondly, the internal high-voltage design and assembly process is complex, and the situation of inconvenient assembly may exist, which is not favorable for the arrangement of high-voltage design.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to overcome the deficiencies of the prior art, and provide a high voltage assembly, a fuel cell module and a vehicle, which improve the output power of the fuel cell module and solve the problem of assembly and assembly, so that the assembly process is simple and flexible, and the high voltage design is stable.

The technical scheme of the invention is that the high-voltage component is applied to a fuel cell module comprising at least two electric piles arranged side by side, and comprises a copper bar component, a positive output terminal, a negative output terminal, a positive connecting piece and a negative connecting piece; the copper bar assembly is used for connecting the output electrodes of the electric piles in series and forming a positive electrode connecting part and a negative electrode connecting part; the positive electrode output terminal is connected with the positive electrode connecting part through the positive electrode connecting piece, and the positive electrode connecting piece and the positive electrode output terminal are arranged at an angle; the negative electrode output terminal is connected with the negative electrode connecting part through the negative electrode connecting piece, and the negative electrode connecting piece and the negative electrode output terminal are arranged at an angle.

Further, the copper bar assembly comprises a positive copper bar, a negative copper bar and at least one connecting copper bar for connecting the at least two galvanic piles in series; anodal copper bar with the negative pole copper bar is the copper bar that has bending structure, the first end of anodal copper bar with the first end of negative pole copper bar constitutes respectively anodal connecting portion with negative pole connecting portion, the second end of anodal copper bar is used for connecting the positive output pole of one of them pile, the second end of negative pole copper bar is used for connecting the negative output pole of another pile.

Furthermore, each connecting copper bar comprises a first copper bar and a second copper bar, the adjacent ends of the first copper bar and the second copper bar are fixedly connected through an auxiliary fastener, and the separated ends of the first copper bar and the second copper bar are respectively connected with different output poles of the two galvanic piles.

Further, the positive output terminal, the negative output terminal, the positive connection part, and the negative connection part are parallel to each other and perpendicular to the positive connection member and the negative connection member.

Further, at least one of the positive electrode connecting part and the negative electrode connecting part is coplanar with the positive electrode copper bar/negative electrode copper bar;

or the first end of the positive copper bar and the first end of the negative copper bar both comprise connecting sections and transition sections, and the two connecting sections respectively form the positive connecting part and the negative connecting part.

Further, the high-voltage assembly also comprises a high-voltage fastener for connecting the copper bar assembly with an output electrode of the galvanic pile; the high-pressure fastener is a bolt; the copper bar assembly is provided with a connecting hole for mounting the high-voltage fastener, the aperture D of the connecting hole is more than 1 and less than or equal to 1.5 of D/D, and D is the nominal diameter of the bolt.

Further, an insulating layer is arranged on at least part of the surface of the copper bar assembly.

Based on the same inventive concept, the invention also provides a fuel cell module, which comprises a shell, at least two electric stacks and the high-voltage component; the shell comprises an upper box body and a lower box body, and the upper box body and the lower box body surround to form an installation cavity; the at least two electric piles are arranged in the installation cavity side by side along the direction parallel to the short sides of the bipolar plates of the electric piles; the positive output terminal and the negative output terminal are arranged on the upper box body at intervals, and the output electrodes of the at least two galvanic piles are connected in series through the copper bar assembly.

Further, the anodes of the membrane electrodes in each of the stacks are oriented in the same direction and are all oriented towards the gas inlet end or the dead end of the stack.

Further, each of the stacks is disposed in a posture in which the bipolar plates are parallel to a horizontal plane and a stacking direction of the bipolar plates is parallel to a vertical direction;

the positive output terminal and the negative output terminal are both positioned at the top of the electric pile and close to an end plate of the electric pile; the axial directions of the positive electrode output terminal and the negative electrode output terminal are parallel to the stacking direction of membrane electrodes of the electric pile.

Further, each of the stacks is disposed in a posture in which the long side of the bipolar plate is parallel to the vertical direction and the stacking direction of the bipolar plate is parallel to the horizontal direction;

the positive output terminal and the negative output terminal are both positioned at the top of the electric pile; the axial directions of the positive electrode output terminal and the negative electrode output terminal are perpendicular to the stacking direction of membrane electrodes of the electric pile.

Furthermore, the fuel cell module further comprises an insulation plate group arranged on the upper box body and/or the galvanic pile, and the copper bar assembly and the upper box body/galvanic pile are distributed on two sides of the insulation plate group.

Further, the insulation board group comprises a first insulation board arranged on the upper box body; the positive output terminal and the negative output terminal penetrate through the first insulating plate;

the copper bar assembly comprises a long copper bar and/or a split type copper bar which at least covers two galvanic piles, a support piece is arranged on the long copper bar, and a connecting piece is arranged on the split type copper bar; the insulation board group comprises at least one second insulation board arranged on the upper box body and at least one third insulation board arranged on the galvanic pile; the second insulating plate is located at the support and/or at the connector; the at least one third insulation plate is located at the connection member.

Based on the same inventive concept, the invention also provides a vehicle comprising any one of the fuel cell modules.

According to the technical scheme, the high-voltage assembly provided by the invention is applied to the fuel cell module comprising at least two electric piles arranged side by side, so that the power is improved, and the high-voltage safety is ensured. The high-voltage component comprises a copper bar component, a positive output terminal, a negative output terminal, a positive connecting piece and a negative connecting piece; the copper bar assembly is used for connecting output electrodes of the galvanic piles in series and forming a positive electrode connecting part and a negative electrode connecting part. On the one hand, anodal output terminal passes through anodal connecting piece and is connected with anodal connecting portion, negative pole output terminal passes through the negative pole connecting piece and is connected with negative pole connecting portion, with the circulation that realizes the circuit, the high pressure that anodal output terminal and negative pole output terminal constitute runs through terminal and is used for connecting high-pressure copper bar subassembly and DCDC of battery package, give DCDC with current output, can realize the integration of pile more than two, export the big electric current, reach higher battery efficiency, can realize that less power pile carries out the high-power pile power output of power promotion. On the other hand, the positive connecting piece and the positive output terminal are arranged at an angle, the negative connecting piece and the negative output terminal are arranged at an angle, namely the space postures of the positive connecting piece and the negative output terminal are different, the positive connecting piece and the negative output terminal can be arranged on different surfaces, so that the high-voltage assembly is convenient to arrange, the distance between the high-voltage assembly and the electric pile in the membrane electrode stacking direction is effectively reduced, and the volume power density of the fuel cell module is favorably improved.

In addition, when the high-voltage assembly is assembled, a high-voltage through terminal consisting of the anode output terminal and the cathode output terminal can be connected with the upper box body of the fuel cell module shell in advance, the copper bar assembly is also connected and arranged on the corresponding galvanic pile to realize series connection, the assembly between the high-voltage through terminal and the upper box body, and the fixed assembly between the copper bar assembly and the galvanic pile as well as the fixed assembly between the copper bar assembly and the lower box body are relatively independent and do not influence each other, and the operation space is abundant before the upper box body and the lower box body are buckled and connected; after the upper box body and the lower box body are buckled, the connecting piece is stretched into the shell only through the upper box body or the process hole formed in the lower box body, the positive connecting part and the negative connecting part are respectively connected with the corresponding output terminals, the high-voltage assembly is simple in structure, and the connection and assembly process of the high-voltage assembly is simple and convenient.

When the high-voltage component is applied to a fuel cell module, the fuel cell module correspondingly has all the beneficial effects, at least two galvanic piles are vertically arranged in a mounting cavity enclosed by an upper box body and a lower box body side by side, an anode output terminal and a cathode output terminal are arranged on the upper box body at intervals, the output electrodes of the at least two galvanic piles are connected in series through a copper bar component, and the high-voltage through terminal is connected to realize power output The connecting and fixing of the high-voltage component solves the technical problems that the high-voltage component is inconvenient to assemble and is not beneficial to arrangement.

Drawings

Fig. 1 is a schematic diagram of a series connection of a high-voltage device and a stack according to embodiment 1 of the present invention;

FIG. 2 is another view of FIG. 1;

FIG. 3 is a schematic diagram of the connection of the high voltage assembly of FIG. 1;

FIG. 4 is a schematic view of the overall assembly of a fuel cell module according to embodiment 2 of the present invention

FIG. 5 is a schematic diagram of the assembly of the high voltage assembly, the stack and the set of insulating plates of FIG. 4;

FIG. 6 is a schematic view of the mating of the high voltage assembly and the set of insulator plates of FIG. 4;

FIG. 7 is an assembled view of the upper housing of FIG. 4;

FIG. 8 is a schematic view of the first insulating plate of FIG. 7;

fig. 9 is a schematic view of the connection of the first insulating plate of fig. 8 with the housing and the high voltage assembly;

fig. 10 is a schematic diagram illustrating the assembly and cooperation of the stack and the high-voltage component in the fuel cell module according to embodiment 3 of the present invention;

FIG. 11 is a left side schematic view of FIG. 10;

fig. 12 is a schematic diagram illustrating assembly and cooperation between a stack and a high-voltage component in a fuel cell module according to embodiment 4 of the present invention.

Fig. 13 is a block diagram of a vehicle according to embodiment 5 of the present application.

Reference numerals: 1000-fuel cell module;

100-a high voltage component; 110-copper bar assembly, 111-positive copper bar, 112-negative copper bar, 113-connecting copper bar, 114-first copper bar, 115-second copper bar, 116-auxiliary fastener, 117-transition section, 118-positive connecting part and 119-negative connecting part; 120-positive output terminal; 130-negative output terminal; 140-positive electrode connection; 150-a negative electrode connector; 160-high pressure fasteners; 170-a support;

200-galvanic pile, 210-air inlet end plate, 211-dead end plate;

300-shell, 310-upper box, 320-lower box, 330-cover;

400-insulation board group, 410-first insulation board, 411-guide cylinder, 420-second insulation board, 430-third insulation board.

Detailed Description

In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings.

Compared with a chemical battery, the hydrogen fuel battery module has the advantages of no pollution, no noise, high battery efficiency and the like. The number of individual cells connected in series by a single stack is limited, because when stacking, once a certain number is exceeded, the following problems arise: 1) the air distribution is uneven, so that the last batteries are not fully utilized; 2) the single battery is inconsistent, so that the voltage deviation of the single battery is overlarge; 3) the heat dissipation is not uniform, resulting in overheating of the middle monolithic cell. Meanwhile, the fuel cell module has small space, and the high-voltage design in the fuel cell module needs to fully consider the checking of the electrical clearance and the creepage distance and the related insulation design. How to boost the output power of the fuel cell module and ensure stable output of the internal high voltage is one of the key points of the current research.

In order to realize the power improvement of a fuel cell module, optimize the internal high-voltage design and simplify the assembly process on the premise of meeting the electrical safety requirement of a stack, the invention provides a high-voltage component, a fuel cell module and a vehicle, and the content of the invention is explained in detail by five specific embodiments as follows:

it should be noted that, in a certain fuel cell, the end plate near the input end of the reaction medium is defined as the air inlet end, the end plate far from the input end of the reaction medium is defined as the blind end, and correspondingly, the end plate at the air inlet end is defined as the air inlet end plate 210, and the end plate at the blind end is defined as the blind end plate 211. In the galvanic pile, the end plate of inlet end, insulation board, collector plate, a plurality of repetitive units (bipolar plate and membrane electrode), the collector plate of blind end, insulation board, the end plate of blind end pile up in proper order, then there are two kinds of arrangement methods in the negative pole, the positive pole orientation of membrane electrode: the arrangement mode of the membrane electrode anode towards the air inlet end (the air inlet end plate 210) is defined as 'right', and the electric pile adopting the arrangement mode is defined as 'right pile'; the arrangement of the membrane electrode cathodes toward the air inlet end (the air inlet end plate 210) is defined as "left", and the stack adopting the arrangement is defined as "left stack"; the left stack and the right stack can be imagined as a left hand and a right hand of a person, and the two galvanic stacks are in mirror symmetry.

The whole cell stack arrangement type is divided into a horizontal arrangement mode and a vertical arrangement mode, wherein the horizontal arrangement mode is that membrane electrodes, bipolar plates and other parts are arranged vertically to the ground, and the vertical arrangement mode is that the membrane electrodes, the bipolar plates and other parts are arranged in parallel to the ground. Considering that the bipolar plate usually has long sides and short sides, the lateral arrangement mode is divided into a horizontal arrangement and a lateral arrangement, wherein the horizontal arrangement is defined as that the long sides of the bipolar plate are arranged parallel to the ground and the short sides are arranged vertical to the ground; the lateral arrangement is defined as the arrangement of the short sides of the bipolar plates parallel to the ground and the long sides perpendicular to the ground.

In the present application, specific explanations of the concepts such as "left stack", "right stack", "vertical arrangement", "horizontal arrangement", etc. refer to the above contents, and for convenience of description, the following embodiments all adopt short abbreviations of the respective explanations.

Example 1

As shown in fig. 1 to fig. 3, the present embodiment provides a high voltage assembly 100, which is applied to a fuel cell module 1000 including at least two stacks 200 arranged side by side, so as to achieve power boost and ensure high voltage safety. The high voltage assembly 100 includes a copper bar assembly 110, a positive output terminal 120, a negative output terminal 130, a positive connector 140, and a negative connector 150; the copper bar assembly 110 is used to connect the output electrodes of the respective stacks 200 in series and form a positive electrode connection part and a negative electrode connection part.

On the one hand, positive output terminal 120 is connected with the positive connecting portion through positive connecting piece 140, negative output terminal 130 is connected with the negative connecting portion through negative connecting piece 150, in order to realize the circulation of circuit, the high-pressure through terminal that positive output terminal 120 and negative output terminal 130 constitute is used for connecting high-pressure copper bar subassembly 110 and the DCDC of battery package, give DCDC with current output, can realize the integration of pile 200 more than two, export big electric current, reach higher battery efficiency, can realize that less power pile 200 carries out the high-power pile power output that power promoted.

On the other hand, the positive connector 140 and the positive output terminal 120 are disposed at an angle, and the negative connector 150 and the negative output terminal 130 are disposed at an angle, that is, the two spatial postures are different, and the two connectors can be disposed on different surfaces, so that the high-voltage assembly 100 can be conveniently arranged, the distance between the high-voltage assembly 100 and the stack 200 in the membrane electrode stacking direction can be effectively reduced, and the volume power density of the fuel cell module 1000 can be improved. Meanwhile, because the butt joint part of the anode connecting part/the cathode connecting part and the high-voltage through terminal is positioned on the side, when assembling, the high-voltage through terminal composed of the anode output terminal 120 and the cathode output terminal 130 can be connected with the upper box 310 of the fuel cell module 1000 shell 300 in advance, the copper bar assembly 110 is also connected and arranged on the corresponding galvanic pile 200 to realize series connection, the assembly between the high-voltage through terminal and the upper box 310, the fixed assembly between the copper bar assembly 110 and the galvanic pile 200 as well as the fixed assembly between the copper bar assembly 110 and the lower box 320 are relatively independent and do not influence each other, and the operation space is abundant before the upper box 310 and the lower box 320 are buckled and connected; after the upper case 310 and the lower case 320 are fastened, the connecting member is extended into the housing 300 only through the process hole formed in the upper case 310 or the lower case 320, so that the positive connecting portion and the negative connecting portion are respectively connected to the corresponding output terminals, the structure of the high voltage assembly 100 is simple, and the connection and assembly process of the high voltage assembly 100 is simple and convenient.

In order to facilitate assembly and fixation, in this embodiment, the high voltage through terminal should preferably be as close to the edge of the stack 200 as possible so as to be close to the edge of the housing 300 of the fuel cell module 1000, so that a person can conveniently arrange the positive electrode connector 140 and the negative electrode connector 150 outside the housing 300.

In this embodiment, the copper bar assembly 110 includes a positive copper bar 111, a negative copper bar 112, and at least one connecting copper bar 113 for connecting at least two galvanic piles 200 in series; because the positive output pole and the negative output pole of the fuel cell module in the prior art are arranged on the same side face of the electric pile 200 and are positioned the same, in order to avoid overlapping, the positive copper bar 111 and the negative copper bar 112 are copper bars with bending structures, the first end of the positive copper bar 111 and the first end of the negative copper bar 112 respectively form a positive connecting part 118 and a negative connecting part 119, the second end of the positive copper bar 111 is used for connecting the positive output pole of one of the electric piles 200, and the second end of the negative copper bar 112 is used for connecting the negative output pole of the other electric pile 200.

The structures of the positive electrode copper bar 111 and the positive electrode connecting part 118 and the structures of the negative electrode copper bar 112 and the positive electrode connecting part 119 are not particularly limited, as long as the positive electrode copper bar and the negative electrode connecting part are respectively connected with the positive electrode output terminal 120 and the negative electrode output terminal 130. As an optional implementation manner, in this embodiment, at least one of the positive electrode connecting portion 118 and the negative electrode connecting portion 119 is coplanar with the positive electrode copper bar 111/the negative electrode copper bar 112; or, the first end of the positive copper bar 111 and the first end of the negative copper bar 112 both include a connecting section and a transition section 117 for transition connection, and the two connecting sections respectively form a positive connecting portion 118 and a negative connecting portion 119, that is, the first end of the positive copper bar 111 is disposed in two types of coplanarity and bending, similarly, the first end of the negative copper bar 112 is also disposed in two types of coplanarity and bending, and the positive connecting portion 118 and the negative connecting portion 119 have four types of combinations.

The effect that the different settings of the transition section have slight differences, but all can guarantee creepage clearance and power consumption safety, the present invention is not specifically limited, for example, the transition section can be bent towards the direction far away from the stack 200 to increase the distance between the connecting part and the side of the stack 200, and the transition section 117 can also be bent towards the direction close to the stack 200 to reserve a certain space on the side of the top of the stack for the installation of other structures, and can also meet the spatial position matching the positive output terminal 120 and the negative output terminal 130. In this embodiment, when the first end of the positive copper bar 111 and/or the negative copper bar 112 has the transition section 117, in order to fully ensure electrical safety, the contact between the connecting member and the stack 200 is fundamentally avoided, and unnecessary space is avoided, and the volume power density of the fuel cell module 1000 is controlled, the positive connecting portion 118/the negative connecting portion 119 connected to the transition section 117 of the fuel cell module 1000 has a projection component parallel to the high voltage through terminal, and the connecting member passes through the corresponding positive connecting portion 118 or the corresponding negative connecting portion 119 and extends into the high voltage through terminal to be connected and fixed by a thread structure.

For ease of installation, in this embodiment, the positive output terminal 120, the negative output terminal 130, the positive connection portion, and the negative connection portion are all parallel to the stacking direction of the membrane electrodes of the stack 200; the positive electrode connector 140 and the negative electrode connector 150 are perpendicular to the stacking direction. Specifically, the positive output terminal 120 and the negative output terminal 130 are radially opened with mounting holes, and the positive connecting portion and the negative connecting portion are correspondingly provided with assembling holes, preferably, the positive connecting portion 118/the negative connecting portion 119 is parallel to the connected output terminal, i.e. the axis of the assembling hole is perpendicular to the positive connecting portion 118/the negative connecting portion 119.

In consideration of the application to the fuel cell module 1000, if the connection site of the copper bar to the output electrode of the cell stack 200 is located between two cell stacks 200, and when the inter-stack gap of the stack 200 is limited, it is inconvenient to connect the copper bar assembly 110 with the stack 200, for the convenience of assembly without affecting the mounting and fixing of the stack 200 in the housing 300 of the fuel cell module 1000, in the present embodiment, each connecting copper bar 113 comprises a first copper bar 114 and a second copper bar 115, the close ends of the first copper bar 114 and the second copper bar 115 are fixedly connected through an auxiliary fastener 116, the separated ends of the first copper bar 114 and the second copper bar 115 are used for respectively connecting different output poles of two galvanic piles 200, the output poles of the galvanic piles 200 are fixedly connected with the connecting ends of the corresponding copper bars in advance, and the galvanic piles 200 are fixed, before connecting first copper bar 114 and second copper bar 115, the position can be adjusted between pile 200, and after no mistake then through supplementary fastener 116 with first copper bar 114 and second copper bar 115 fixed can.

The high-voltage assembly 100 provided by the invention further comprises a high-voltage fastener 160 for connecting the copper bar assembly 110 with an output pole of the galvanic pile 200; the high pressure fasteners 160 are bolts; the copper bar assembly 110 is provided with a connection hole for mounting a high-voltage fastener 160.

In order to ensure the stable connection between the copper bar assembly 110 and the output electrode of the stack 200, in this embodiment, the number of the connecting holes at one end of each copper bar and the number of the high-voltage fasteners 160 are at least two, which is compared with the scheme of one bolt connection in the prior art, thereby avoiding the problem of electric arcs or electric sparks caused by looseness, rotation and the like between the current collecting plate and the copper bar assembly 110 in the random vibration process of the fuel cell module 1000, and improving the electrical safety.

In consideration of the phenomena of material degradation and stress relaxation of the sealing rings, thermal expansion and contraction due to environmental influences on the single cells, and the like, the single cell stack 200 of the fuel cell module 1000 generally has a structure such as a disc spring, a coil spring, and the like on the dead end plate 211 on the end side, and the relative positions of the collector plates at both ends of the cell stack 200 may also change. On the other hand, because the types of the components of the electric stack 200 are various, the number of the single cells is large, usually more than 100 segments, and the number of the single cells is gradually increased along with the improvement of the power requirement of the whole vehicle, the electric stack 200 formed by 300 single cells has appeared at present, the structural uniformity of the single cells gradually becomes a key factor influencing the product uniformity of the single electric stack 200 of the fuel cell module 1000, and the size of the single electric stack 200 in the stacking direction has a certain deviation. For the above two reasons, the high voltage design inside the single stack 200 needs to have a certain fault tolerance.

The soft copper bar of current technical scheme can only be used in the battery that the electric current is less (below 300A), and the soft copper bar of 3mm thickness above bends and can appear the condition of copper bar fault. In a large-current environment, only the hard copper bar can be selected. In order to take fault tolerance into consideration, in the embodiment, the aperture D of the connecting hole satisfies 1 < D/D < 1.5, wherein D is the nominal diameter of the bolt. For example, the bolt is of M5 type, and the connecting hole is set to be M6.5.

In order to further ensure the electrical safety, the high-voltage assembly 100 provided by the invention is provided with an insulating layer on at least part of the surface of the copper bar assembly 110. In this embodiment, the surfaces of the copper bar assembly 110 except for the high-voltage fasteners 160, the auxiliary fasteners 116 and the connecting members, i.e., the areas where the bolts are connected, are coated with epoxy resin materials, and the epoxy resin is used as an insulating material to ensure an electrical safety gap between the copper bar and the surrounding environment.

The application method and the working principle of the high-voltage assembly 100 provided by the embodiment are as follows:

each copper bar in the copper bar assembly 110 is connected with the output pole of the corresponding galvanic pile 200 in advance respectively, and the galvanic pile 200 can be connected and fixed with the lower box body 320 independently, after the final position of each copper bar and each galvanic pile 200 is determined to be correct, the auxiliary fastener 116 is utilized to connect the second copper bar 115 of the first copper bar 114 of the fixedly connected copper bar 113, and the series connection of at least two galvanic piles 200 is completed. The positive output terminal 120 and the negative output terminal 130 are pre-mounted on the upper case 310 of the fuel cell module 1000, after the upper case 310 and the lower case 320 are fastened, the positive output terminal 120 is aligned with the positive connecting portion 118 of the positive copper bar 111, the negative output terminal 130 is aligned with the negative connecting portion 119 of the negative copper bar 112, and the alignment positions are located on the side surface of the output terminal, and the positive connecting piece 140 and the negative connecting piece 150 are assembled through the side surface fabrication hole of the upper case 310, so that the assembly is completed.

The invention can solve the difficulty of considering the electrical clearance, creepage distance and electrical safety requirements in the process of integrating the galvanic pile 200, thereby improving the electrical safety of integrating the galvanic pile 200. The invention can meet the high-voltage design fault-tolerant requirement of the galvanic pile 200 in the integration process of the galvanic pile 200, allows the relative positions of the current collecting plates at two ends of a single galvanic pile 200 to change in the actual operation process, has certain deviation in the size of the operated single galvanic pile 200 in the stacking direction, and reduces the risk that the galvanic pile 200 cannot be assembled.

Example 2

Based on the same inventive concept, the present embodiment provides a fuel cell module 1000 including the high voltage assembly 100 of embodiment 1, a case 300, and at least two stacks 200, as shown in fig. 1 to 9. That is, the fuel cell module 1000 may adopt a double stack integration, a three stack integration, a four stack integration, a six stack integration, and the like.

When the high-voltage assembly 100 of embodiment 1 is applied to the fuel cell module 1000, the fuel cell module 1000 naturally has all the advantageous effects described above. The housing 300 comprises an upper case 310 and a lower case 320, wherein the upper case 310 and the lower case 320 enclose an installation cavity; at least two electric piles 200 are arranged in the installation cavity side by side along the direction parallel to the short sides of the bipolar plates of each electric pile 200; the electric piles 200 are arranged side by side in the same posture and arranged in short sides, the volume of the integrated multi-electric pile is effectively controlled, the length and the width of the integrated whole pile are not greatly different, arrangement of parts is facilitated, all output electrodes are located on the same section, and arrangement and connection of the high-voltage assembly 100 are simplified. The positive output terminal 120 and the negative output terminal 130 are alternately disposed on the upper case 310, the output electrodes of the respective stacks 200 are connected in series through the copper bar assembly 110, and connect the high pressure through terminal and realize power output, realize the integration of two galvanic piles 200 on the one hand, realize the technological effect that power promoted, on the other hand only needs before last box 310 and lower box 320 encapsulation, positive output terminal 120 and negative output terminal 130 are fixed respectively on last box 310, set up copper bar subassembly 110 on galvanic pile 200, the butt joint portion that positive connecting portion/negative connecting portion and high pressure through terminal is located the side, only need make this butt joint portion be close to the edge of casing 300 as far as possible, the staff can stretch into the connecting piece and accomplish the connection of high-voltage component 100 in the installation cavity through the fabrication hole that this last box 310 or lower box 320 seted up and fix, the technical problem that the high-voltage component 100 of inconvenience was assembled, be unfavorable for high-voltage component 100 to arrange has been solved. Other configurations of the fuel cell module 1000 not mentioned can be found in the prior art.

Each cell stack 200 of the fuel cell module 1000 is arranged in the short side direction parallel to the bipolar plate in the cell stack 200, that is, the posture of each cell stack 200 of the fuel cell module 1000 is the same, for example, the cell stacks can be arranged vertically or horizontally, and are distributed at intervals along the short side direction of the bipolar plate, and the inter-stack distance is used for routing, arranging parts such as high-voltage copper bars.

In this embodiment, the fuel cell module 1000 includes three stacks 200, and the number of the repeating units (bipolar plates + membrane electrodes) in the three stacks 200 is the same, so that the heights (the dimensions in the stacking direction of the repeating units) of the three stacks 200 are substantially uniform.

Each stack 200 of the fuel cell module 1000 is disposed in a posture in which the bipolar plate is parallel to the horizontal plane and the stacking direction of the bipolar plate is parallel to the vertical direction, that is, the three stacks 200 are disposed vertically. In the case where the cell stack 200 is vertically arranged, the positive output terminal 120 and the negative output terminal 130 are located at the top of the cell stack 200 and close to the end plate of the cell stack 200, and the axial directions of the positive output terminal 120 and the negative output terminal 130 are parallel to the stacking direction of the membrane electrodes of the cell stack 200. In the fuel cell module 1000, the anodes of the membrane electrodes in the respective stacks 200 face the same direction and all face the inlet end. That is, each cell stack 200 of the fuel cell module 1000 of the present application is a "right stack" as shown in fig. 1 to 9.

In order to make the length and width of the fuel cell module 1000 more consistent, and at the same time facilitate the layout of other systems and structures of the fuel cell module 1000, such as the distribution manifold, the sealing assembly, and the low voltage apparatus, in this embodiment, at least two cell stacks 200 are spaced apart along the width direction of the inlet end plate 210.

In order to control the volumetric power density of the fuel cell module 1000, in the present embodiment, the arrangement directions of the electric stacks 200 are preferably the same, so that the output electrodes of the remaining electric stacks 200 are all located in the inter-stack gap between two adjacent electric stacks 200 except for one of the outer electric stacks 200.

The specific structure of the copper bar assembly 110 and the position relationship among the positive copper bar 111, the negative copper bar 112 and the connecting copper bar 113 are not specifically limited, as long as the creepage clearance and the electric safety can be met. In order to further control the volumetric power density of the fuel cell module 1000, in the present embodiment, the positive electrode copper bar 111 and the connecting copper bar 113 each have a first portion parallel to the inlet end plate 210 of the stack 200 and a second portion parallel to the stacking direction of the membrane electrodes; the positive electrode connecting part 118 is connected to the outer end of the first part and is parallel to the second part, and the second part is positioned in the inter-stack gap; the part of the negative electrode copper bar 112 covering the membrane electrode is parallel to the side where the long side of the bipolar plate is located, and the negative electrode connecting part 119 is located at the part of the negative electrode copper bar 112, which exceeds the membrane electrode and is far away from the negative output electrode. The layout of the copper bar makes full use of the inter-stack gap generated by the layout of the galvanic pile 200 and the gap between the galvanic pile 200 and the upper box body 310, so that the copper bar is prevented from expanding the occupied space at the two ends of the air inlet end plate 210 in the length direction, the volume of the copper bar assembly 110 and the galvanic pile 200 is effectively reduced, and the volume power density of the fuel cell module 1000 is improved.

In order to achieve insulation and ensure high-voltage electricity utilization safety, the fuel cell module 1000 in this embodiment further includes an insulation plate set 400 disposed on the upper case 310 and/or the stack 200, and the copper bar assembly 110 and the upper case 310/stack 200 are distributed on two sides of the insulation plate set 400.

In order to realize the insulation between the high-voltage through terminal and the housing 300 and the insulation between the positive copper bar 111 and the negative copper bar 112 and the housing 300, in the present embodiment, the insulation plate group 400 includes a first insulation plate 410 disposed on the upper case 310; the positive output terminal 120 and the negative output terminal 130 penetrate the first insulating plate 410 with a gap therebetween.

Specifically, in this embodiment, the positive connector 140 and the negative connector 150 are perpendicular to the output terminal, the first insulating plate 410 is provided with a terminal installation hole, and the first insulating plate 410 is convexly provided with a guide cylinder 411 for the positive connector 140 and the negative connector 150 to pass through respectively, the terminal installation hole is perpendicular to the guide cylinder 411, and after the assembly and the alignment, the connection portion of the positive copper bar 111 and the connection portion of the negative copper bar 112 are located between the guide cylinder 411 and the high-voltage through terminal.

In order to add first insulating plate 410 and guarantee the installation location the time, the volume of control box, in this embodiment, the first end of anodal copper bar 111 and the first end of negative pole copper bar 112 all include the linkage segment and be used for transitional coupling's changeover portion 117, anodal connecting portion 118 and the negative pole connecting portion 119 that the linkage segment constitutes are all on a parallel with the orientation of piling up of membrane electrode, and the changeover portion 117 of negative pole copper bar 112 is buckled to the direction that is close to pile 200, anodal connecting portion 118 is wound to one side of negative pole connecting portion 119 with the changeover portion 117 of anodal copper bar 111.

In order to facilitate the operation of the positive connector 140 and the negative connector 150 outside the casing 300 after the upper case 310 and the lower case 320 are fastened, in this embodiment, the positive output terminal 120 and the negative output terminal 130 are disposed above one of the stacks 200 located outside, the two output terminals should be parallel to the edge of the casing 300 as much as possible and close to the edge of the casing 300, and the casing 300 is correspondingly provided with process holes for disposing the positive connector 140 and the negative connector 150.

In order to facilitate hoisting galvanic pile 200 into box 320 one by one, and be convenient for connect the assembly, the dismouting adjustment of being convenient for, the degree of depth of going up box 310 is greater than the degree of depth of box 320 down, under the prerequisite that satisfies other demands, will descend box 320 to design into shallower structure, the location of being convenient for galvanic pile 200 is fixed and fixed with being connected of copper bar subassembly 110, make simultaneously to go up box 310 and have the space of seting up the fabrication hole.

In order to ensure the sealing of the fuel cell module 1000 after assembly, in the present embodiment, the fuel cell module 1000 further includes a cover 330 for sealing the process hole, and the cover 330 is detachably disposed on the upper case 310.

Because this embodiment does not inject the relation of connection and the length of each copper bar in the copper bar subassembly 110, so the mode of can carrying out is a lot of, probably leads to copper bar subassembly 110 to include long copper bar and/or split type copper bar that covers two electric heaps 200 at least, in order to guarantee that long copper bar is highly stable in electric heap 200 emission direction, is provided with support piece 170 on long copper bar, in order to guarantee the electrically conductive intercommunication of split type copper bar, is provided with the connecting piece on the split type copper bar. In order to achieve insulation, the insulation plate group 400 includes at least one second insulation plate 420 disposed on the upper case 310 and at least one third insulation plate 430 disposed on the stack 200; the second insulation plate 420 is located at the supporter 170 and/or the connector; at least one third insulation board 430 is located the connecting piece department, and the connecting piece clamp of split type copper bar is located between second insulation board 420 and the third insulation, guarantees the insulation of connecting piece department.

In order to simplify the installation, in this embodiment, the copper bar where the positive electrode connecting portion is located and the copper bar where the negative electrode connecting portion is located are respectively connected to the two galvanic piles 200 located outside, and preferably, other copper bars of the copper bar assembly 110 are connected to the two adjacent galvanic piles 200.

Due to the above layout, it is inevitable that at least the arrangement of the positive copper bar 111 or the negative copper bar 112 needs to cover at least two galvanic piles 200, and in order to ensure the height in the discharge direction of the galvanic piles 200, for example, three galvanic piles 200 are integrated, and the support member 170 is arranged on the positive copper bar 111 or the negative copper bar 112 crossing at least two galvanic piles 200; the connecting copper bar 113 of the copper bar assembly 110 in embodiment 1 includes a first copper bar 114 and a second copper bar 115, that is, the above-mentioned split copper bar is formed, and the auxiliary fastener 116 for connecting the first copper bar 114 and the second copper bar 115 forms the above-mentioned connecting member. In this embodiment, for insulation, the supporting member 170 is a bolt, and the portion of the bolt for connecting the stack 200 is an insulation screw. The second insulating plate 420 is two, one of which is located at the supporter 170 to insulate the head of the supporter 170 from the upper case 310; another second insulation plate 420 covers the auxiliary fasteners 116 of the two connecting copper bars 113 at the same time to achieve insulation between the heads of the auxiliary fasteners 116 and the upper case 310. The number of the third insulation plates 430 is two, and the third insulation plates are respectively located at positions corresponding to the auxiliary fasteners 116 on the two stacks 200, so as to realize insulation between the tail portions of the auxiliary fasteners 116 and the stacks 200.

The surface insulating material of the insulating plate is not limited, and may be selected according to actual requirements, and in this embodiment, the first insulating plate 410, the second insulating plate 420, and the third insulating plate 430 all use epoxy resin materials.

In order to cooperate with the stack 200 to form a complete fuel cell module, the fuel cell module 1000 further includes a gas distribution assembly and a voltage routing inspection device. A distribution assembly is in communication with each stack 200 for providing an oxidizing medium (e.g., air), a reducing medium (e.g., hydrogen), and a cooling medium (e.g., coolant) to each stack 200. This distribution subassembly and voltage inspection device specifically can adopt built-in or external scheme, also according to actual need, can locate the distribution subassembly and voltage inspection device in that casing 300 is outside or inside. The gas distribution assembly and the voltage inspection device can adopt relevant disclosures in the prior art, and the specific content is not limited in the application.

Example 3

Based on the same inventive concept, the present embodiment provides a fuel cell module 1000 including the high-voltage assembly 100 of embodiment 1, a case 300, and at least two stacks 200, as shown in fig. 10 to 11. That is, the fuel cell module 1000 may adopt a double stack integration, a three stack integration, a four stack integration, a six stack integration, and the like. In this embodiment, the fuel cell module 1000 includes three stacks 200, the three stacks are distributed at intervals along the short side direction of the bipolar plate, and the inter-stack distance is used for routing and arranging parts such as high-voltage copper bars. And the number of the repeating units (bipolar plates + membrane electrodes) in the three stacks 200 is the same so that the heights (the dimensions in the stacking direction of the repeating units) of the three stacks 200 are substantially uniform.

In this embodiment, each stack 200 of the fuel cell module 1000 is disposed in a posture in which the bipolar plates are parallel to the horizontal plane and the stacking direction of the bipolar plates is parallel to the vertical direction, that is, when the stacks are all vertically disposed, the positive output terminal 120 and the negative output terminal 130 are both located at the top of the stack 200 and close to the end plate of the stack 200, and the axial directions of the positive output terminal 120 and the negative output terminal 130 are both parallel to the stacking direction of the membrane electrodes of the stack 200. In the fuel cell module 1000, the anodes of the membrane electrodes in the respective stacks 200 face the same direction and all face the dead end. That is, each cell stack 200 of the fuel cell module 1000 of the present application is a "left stack".

The structures of the stacks 200 and the high-voltage components of the fuel cell module 1000 in this embodiment, which are not described in detail, can be referred to the structures of embodiments 1 and 2 and the related disclosure of the prior art, and will not be described herein.

In the layout of "left stack" + vertical placement, the cathode output electrode of the stack is close to the top of the stack, and the anode output electrode is close to the bottom of the stack, which is opposite to the layout of "right stack" + vertical placement, in order to not change other layouts and the relative positions of the anode output terminal and the cathode output terminal, in this embodiment, the connection mode of the stack 200 of the fuel cell module and the high-voltage assembly 100 is different from that of embodiment 2, and the anode copper bar 111 has a first part parallel to the gas inlet end plate 210 of the stack 200 and two second parts parallel to the stacking direction of the membrane electrodes; the first portion of positive pole copper bar 111 passes by the bottom below of galvanic pile 200, and is used for connecting the second portion of positive pole output terminal 120 and extends to the top by the bottom of galvanic pile 200, and negative pole copper bar 112 is on a parallel with the side that the long limit of bipolar plate of galvanic pile 200 was located, bends after negative output electrode is connected to negative pole copper bar 112 and extends to the top of galvanic pile 200.

When the high-voltage assembly 100 of embodiment 1 is applied to the fuel cell module 1000, the fuel cell module 1000 naturally has all the advantageous effects described above. The output pole of two at least galvanic piles 200 passes through copper bar subassembly 110 and establishes ties, and connect the high pressure to run through the terminal and realize power output, realize the integration of two galvanic piles 200 on the one hand, realize the technological effect that power promoted, on the other hand only needs before last box 310 and lower box 320 encapsulation, fixed anodal output terminal 120 and negative pole output terminal 130 on last box 310 respectively, set up copper bar subassembly 110 on galvanic pile 200, anodal connecting portion/negative pole connecting portion and the butt joint portion of high pressure through the terminal are located the side, only need make this butt joint portion be close to the edge of casing 300 as far as possible, the staff can stretch into the connecting piece and accomplish the connection of high-voltage component 100 in the installation cavity through the fabrication hole that this last box 310 or lower box 320 was seted up and fix, the inconvenient high-voltage component 100 equipment has been solved, be unfavorable for the technical problem that high-voltage component 100 arranged. Other structures not mentioned for the fuel cell module 1000 can be found in the prior art.

Similarly, in order to cooperate with the stack 200 to form a complete fuel cell module, the fuel cell module 1000 further includes a gas distribution assembly and a voltage routing inspection device. A distribution assembly is in communication with each stack 200 for providing an oxidizing medium (e.g., air), a reducing medium (e.g., hydrogen), and a cooling medium (e.g., coolant) to each stack 200. This distribution subassembly and voltage inspection device specifically can adopt built-in or external scheme, also according to actual need, can locate the distribution subassembly and voltage inspection device in that casing 300 is outside or inside. The gas distribution assembly and the voltage inspection device can adopt relevant disclosures in the prior art, and the specific content is not limited in the application.

Example 4

Based on the same inventive concept, the present embodiment provides a fuel cell module 1000 including the high-voltage assembly 100 of embodiment 1, a case 300, and at least two stacks 200, as shown in fig. 12. That is, the fuel cell module 1000 may adopt a double stack integration, a three stack integration, a four stack integration, a six stack integration, and the like. In this embodiment, the fuel cell module 1000 includes three stacks 200, the three stacks are all distributed at intervals along the short side direction of the bipolar plate, and the inter-stack distance is used for routing and arranging parts such as high-voltage copper bars. And the number of the repeating units (bipolar plates + membrane electrodes) in the three stacks 200 is the same so that the heights (the dimensions in the stacking direction of the repeating units) of the three stacks 200 are substantially uniform.

In this embodiment, each stack 200 of the fuel cell module 1000 is disposed in a posture that the long side of the bipolar plate is parallel to the vertical direction and the stacking direction of the bipolar plate is parallel to the horizontal direction, that is, the stacks are all disposed on the side, at this time, the positive output terminal 120 and the negative output terminal 130 are both located at the top of the stack 200 and are close to one of four circumferential side faces formed by membrane electrode stacking of the stack 200, that is, the side face where the long side of the bipolar plate is located; the axial directions of the positive output terminal 120 and the negative output terminal 130 are perpendicular to the stacking direction of the membrane electrodes of the stack 200. In the fuel cell module 1000, the anodes of the membrane electrodes in the respective stacks 200 face the same direction and face the dead end or the intake end. That is, each cell stack 200 of the fuel cell module 1000 of the present application is a "left stack" or a "right stack".

Other detailed structures of the stacks 200 and the high voltage assembly 100 of the fuel cell module 1000 in this embodiment can be referred to the related structures in embodiments 1 and 2 and the related disclosures in the prior art, and will not be described herein.

Taking three "right stacks" + sides as an example, as shown in fig. 12, the positive output terminal 120 and the negative output terminal 130 are both located at the top of the stacks 200 and are close to one of the four circumferential sides formed by the membrane electrode stack of one of the outermost stacks 200. The positive electrode copper bar 111 and the connecting copper bar 113 have a first portion parallel to the inlet end plate 210 of the stack 200 and a second portion perpendicular to the stacking direction of the membrane electrode, that is, the plane of the second portion is parallel to the side surface where the long side of the bipolar plate of the stack 200 is located, the positive electrode connecting portion 118 is located on the second portion far away from the negative output electrode, and the positive electrode output terminal is perpendicular to the stacking direction of the membrane electrode. The negative copper bar 112 is parallel to the side where the long side of the bipolar plate of the stack 200 is located, and the negative copper bar 112 is bent and extends to the top of the stack 200 after being connected with the negative output electrode.

Similarly, in order to cooperate with the stack 200 to form a complete fuel cell module, the fuel cell module 1000 further includes a gas distribution assembly and a voltage routing inspection device. An air distribution assembly is in communication with each stack 200 for providing an oxidizing medium (e.g., air), a reducing medium (e.g., hydrogen), and a cooling medium (e.g., coolant) to each stack 200. This distribution subassembly and voltage inspection device specifically can adopt built-in or external scheme, also according to actual need, can locate the distribution subassembly and voltage inspection device in that casing 300 is outside or inside. The gas distribution assembly and the voltage inspection device can adopt relevant disclosures in the prior art, and the specific content is not limited in the application.

Example 5

Based on the same inventive concept, the present embodiment provides a vehicle equipped with at least one of the fuel cell modules 1000 of embodiments 2, 3, and 4 described above. Referring specifically to fig. 13, the fuel cell power system of the vehicle is provided with the fuel cell module of any one of embodiments 2 to 4 described above, and more specifically, the fuel cell system of the fuel cell power system of the vehicle is provided with the fuel cell module of any one of embodiments 2 to 4 described above. In addition, the vehicle needs to include a transmission system that transmits torque to drive the electric motor to rotate the drive wheels, and a fuel storage device for storing fuel that acts like a fuel tank in a fuel-powered vehicle that communicates with a fuel supply subsystem of the fuel cell system via a conduit.

Referring specifically to fig. 13, the fuel cell system includes a fuel cell module and a fuel cell auxiliary system, and the fuel cell system can be normally operated under the condition of an external fuel supply source. The fuel cell module in the fuel cell system may adopt the fuel cell module in any of embodiments 2 to 4, and details thereof are not repeated herein.

The fuel cell auxiliary system comprises an air supply subsystem, a fuel supply subsystem, a thermal management subsystem and an automatic control system, wherein the air supply subsystem is used for supplying air to each electric pile of the fuel cell module and selectively processing the air in aspects of filtration, humidification, pressure regulation and the like; the fuel supply subsystem is used for supplying fuel to each electric pile of the fuel cell module, and selectively carrying out humidification, pressure regulation and other aspects on the fuel so as to convert the fuel into fuel gas suitable for running in the fuel cell pile, taking hydrogen as fuel for example, the fuel supply subsystem is communicated with a hydrogen inlet and a hydrogen outlet of each electric pile of the fuel cell module; and the heat management subsystem is communicated with each electric pile of the fuel cell module to provide cooling liquid to cool and/or heat the electric pile and recover and treat the water generated by the electric pile.

The automatic control system is electrically connected with the fuel cell module, the air supply subsystem, the fuel supply subsystem and the heat management subsystem respectively, and is an assembly comprising a sensor, an actuator, a valve, a switch and a control logic component, so that the fuel cell system can work normally without manual interference. In other embodiments, the fuel cell auxiliary system may further include a ventilation system for mechanically exhausting the gas inside the cabinet of the fuel cell system to the outside. In the present embodiment, the fuel cell auxiliary system in the fuel cell system is not modified, so that reference may be made to the related disclosure of the prior art for more details, which will not be described herein.

Referring to fig. 13, the fuel cell power system includes the fuel cell system, a DC/DC converter, a driving motor, a motor controller thereof, and a vehicle-mounted energy storage device, where the DC/DC converter is electrically connected to each stack of the fuel cell system to implement voltage conversion, and regulates the voltage generated by each stack and outputs the regulated voltage to the driving motor, high-voltage devices such as an automobile air conditioner compressor, and a battery, and other energy storage devices. The driving motor is electrically connected with the DC/DC converter and is used for providing torque required by vehicle running; the motor controller is electrically connected with the driving motor to control the starting, stopping, torque output and the like of the driving motor, is connected with the vehicle controller to receive driving signals sent by the vehicle controller, and can also be electrically connected with an automatic control system of the fuel cell system. The vehicle-mounted energy storage device is used for storing electric energy to supply power to other electronic equipment in the vehicle, and is electrically connected with the DC/DC converter, for example, the vehicle-mounted energy storage device is a storage battery.

In the present embodiment, the DC/DC converter, the driving motor and its motor controller, and the vehicle-mounted energy storage device in the fuel cell power system are not modified, so that reference may be made to the related disclosure of the prior art for more details, and the description thereof is omitted here.

Thus, the vehicle may be a hydrogen energy vehicle or a hydrogen + charged hybrid electric vehicle. Since the specific structure of the vehicle is not improved in the embodiment, the structure of the vehicle where no change is made in the embodiment can refer to the prior art, and the specific content is not described herein. Thus, the vehicle has all of the features and advantages previously described for the fuel cell module and will not be described in detail herein.

Through the embodiment, the invention has the following beneficial effects or advantages:

1) according to the high-voltage component and the fuel cell module, on one hand, integration of more than two galvanic piles is achieved, the high-voltage component and the fuel cell module are particularly suitable for integration of three galvanic piles, the technical effect of power improvement is achieved, on the other hand, only before an upper box body and a lower box body are packaged, an anode output terminal and a cathode output terminal are fixed on the upper box body respectively, a copper bar component is arranged on the galvanic piles, the butt joint portion of an anode connecting portion/a cathode connecting portion and a high-voltage through terminal is located on the side face, the butt joint portion is close to the edge of a shell as far as possible, a worker can extend a connecting piece into a mounting cavity through a process hole formed in the upper box body or the lower box body to complete connection and fixation of the high-voltage component, and the technical problems that assembly of the high-voltage component is inconvenient to assemble and arrangement of the high-voltage component is not facilitated are solved.

2) The high-voltage component and the fuel cell module provided by the invention can solve the difficulty of considering both the electrical clearance, the creepage distance and the electrical safety requirement in the galvanic pile integration process, thereby improving the electrical safety of galvanic pile integration. The invention can meet the high-voltage design fault tolerance requirement of the galvanic pile in the process of the galvanic pile integration, allows the relative positions of the current collecting plates at the two ends of the fuel cell galvanic pile to change in the actual operation process, has certain deviation in the size of the fuel cell galvanic pile in the stacking direction, and reduces the risk that the galvanic pile cannot be assembled.

While the preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A high-voltage component is applied to a fuel cell module comprising at least two electric piles arranged side by side and is characterized by comprising a copper bar component, a positive output terminal, a negative output terminal, a positive connecting piece and a negative connecting piece; the copper bar assembly is used for connecting the output electrodes of the electric piles in series and forming a positive electrode connecting part and a negative electrode connecting part; the positive electrode output terminal is connected with the positive electrode connecting part through the positive electrode connecting piece, and the positive electrode connecting piece and the positive electrode output terminal are arranged at an angle; the negative electrode output terminal is connected with the negative electrode connecting part through the negative electrode connecting piece, and the negative electrode connecting piece and the negative electrode output terminal are arranged at an angle.

2. The high voltage assembly of claim 1, wherein said copper bar assembly comprises a positive copper bar, a negative copper bar, and at least one connecting copper bar for connecting said at least two galvanic stacks in series; anodal copper bar with the negative pole copper bar is the copper bar that has bending structure, the first end of anodal copper bar with the first end of negative pole copper bar constitutes respectively anodal connecting portion with the negative pole connecting portion, the second end of anodal copper bar is used for connecting the positive output pole of one of them pile, the second end of negative pole copper bar is used for connecting the negative output pole of another pile.

3. The high-voltage assembly according to claim 2, wherein each of the connecting copper bars comprises a first copper bar and a second copper bar, the adjacent ends of the first copper bar and the second copper bar are fixedly connected through an auxiliary fastener, and the separated ends of the first copper bar and the second copper bar are respectively connected with different output poles of the two galvanic piles.

4. The high voltage assembly of claim 2, wherein the positive output terminal, the negative output terminal, the positive connection portion, and the negative connection portion are parallel to each other and perpendicular to the positive connection member and the negative connection member, respectively, perpendicular to the stacking direction.

5. The high voltage assembly of any one of claims 1-4, wherein at least one of the positive connection and the negative connection is coplanar with the positive copper bar/negative copper bar on which it is located;

or the first end of the positive electrode copper bar and the first end of the negative electrode copper bar both comprise connecting sections and transition sections, and the connecting sections respectively form the positive electrode connecting part and the negative electrode connecting part.

6. The high voltage assembly of claim 5, further comprising a high voltage fastener for connecting the copper bar assembly with an output pole of the stack; the high-pressure fastener is a bolt; the copper bar assembly is provided with a connecting hole for mounting the high-voltage fastener, the aperture D of the connecting hole satisfies that D/D is more than 1 and less than or equal to 1.5, and D is the nominal diameter of the bolt.

7. The high voltage assembly of claim 6, wherein at least a portion of a surface of said copper bar assembly is provided with an insulating layer.

8. A fuel cell module comprising a housing, at least two stacks, and the high voltage assembly of any one of claims 1-7; the shell comprises an upper box body and a lower box body, and the upper box body and the lower box body surround to form an installation cavity; the at least two electric piles are arranged in the mounting cavity side by side along the direction parallel to the short sides of the bipolar plates of each electric pile; the positive output terminal and the negative output terminal are arranged on the upper box body at intervals, and the output electrodes of the at least two galvanic piles are connected in series through the copper bar assembly.

9. The fuel cell module of claim 8, wherein the anodes of the membrane electrodes in each stack are oriented the same and are each oriented toward the inlet or blind end of the stack.

10. The fuel cell module according to claim 9, wherein each of the stacks is disposed in a posture in which the bipolar plate is parallel to a horizontal plane and a stacking direction of the bipolar plate is parallel to a vertical direction;

11. The fuel cell module according to claim 9, wherein each of the stacks is disposed in a posture in which the long side of the bipolar plate is parallel to a vertical direction and the stacking direction of the bipolar plate is parallel to a horizontal direction;

12. The fuel cell module according to any one of claims 8 to 11, further comprising an insulation plate group provided on the upper tank and/or the stack, wherein the copper bar assembly and the upper tank/stack are distributed on both sides of the insulation plate group.

13. The fuel cell module according to claim 12, wherein the insulation plate group includes a first insulation plate provided on the upper case; the positive output terminal and the negative output terminal penetrate through the first insulating plate;

14. A vehicle characterized by comprising the fuel cell module of any one of claims 8-13.