Electrochemical reaction device

Abstract

The utility model relates to the technical field of electrochemical reaction devices, in particular to an electrochemical reaction device. The electrochemical reaction device provided by the utility model comprises a bracket, an electric pile, a series current collector and a parallel current collector, the electric pile is arranged in the bracket, each cathode plate is connected with a first connecting piece, and each anode plate is connected with a second connecting piece; the first connecting piece can be detachably connected with the series current collector and the parallel current collector, and the second connecting piece can be detachably connected with the series current collector and the parallel current collector. Therefore, when series connection and parallel connection switching of the electrochemical reaction devices is carried out, only the first connecting piece and the second connecting piece need to be switched to be connected with the series current collector or the parallel current collector, the galvanic pile does not need to be disassembled, the disassembling cost is reduced, and series connection and parallel connection switching of the electrochemical reaction devices is simpler and more efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrochemical reaction device technical field, concretely relates to a kind of electrochemical reaction devices. BACKGROUND

[0002] Electrochemical reaction devices are equipment used for electrochemical reactions, typically including electrodes, electrolytes, power sources, and other auxiliary equipment. They are widely used in the chemical industry, energy storage (such as batteries), environmental management, material synthesis, and laboratory experiments.

[0003] Electrochemical reaction devices have series and parallel power supply forms, which can meet different power and voltage requirements through different power supply methods. However, existing electrochemical reaction devices can only meet one type of circuit connection (series or parallel), and when switching between series and parallel power supply methods, the stack needs to be disassembled and replaced with corresponding electrode plates and gaskets. Disassembling the stack poses a risk of damaging the membrane and electrodes, and it is time-consuming and labor-intensive. UTILITY MODEL CONTENT

[0004] (I) The technical problem to be solved by the utility model is that existing electrochemical reaction devices can only meet one type of circuit connection, and disassembling the stack is required when switching between connection methods, which is cumbersome and poses a risk of damaging the membrane and electrodes during disassembly.

[0005] (II) Technical solution

[0006] To solve the above technical problems, an embodiment of the utility model provides an electrochemical reaction device, which includes a support, a stack, a series current collector, and a parallel current collector. The stack is arranged in the support.

[0007] The stack includes multiple groups of electrochemical units arranged from top to bottom, and an insulating plate is arranged between adjacent two electrochemical units.

[0008] The electrochemical unit includes a cathode plate, an anode plate, an electrode, and an ion exchange membrane. The cathode plate and the anode plate are electrically connected through the electrode and the ion exchange membrane. Each cathode plate is connected with a first connecting piece, and each anode plate is connected with a second connecting piece.

[0009] The first connecting piece can be detachably connected with the series current collector and the parallel current collector, and the second connecting piece can be detachably connected with the series current collector and the parallel current collector.

[0010] According to an embodiment of the utility model, the first connecting piece includes a first connecting sheet, one end of which is connected with the corresponding cathode plate, and the other end forms a first connecting lug. The connecting part includes a first notch arranged at the first connecting lug.

[0011] The second connecting piece comprises a second connecting plate, one end of which is connected with the corresponding anode plate, and the other end forms a second connecting lug, and the connecting part comprises a second notch provided at the second connecting lug.

[0012] According to an embodiment of the present application, a plurality of the first connecting plates are arranged in a row from top to bottom on one side of the stack, and the first notches of the plurality of the first connecting plates are sequentially corresponding from top to bottom;

[0013] A plurality of the second connecting plates are arranged in a row from top to bottom on the other side of the stack, and the second notches of the plurality of the second connecting plates are sequentially corresponding from top to bottom.

[0014] According to an embodiment of the present application, the series current collector comprises an insulating first current collector rod and a second current collector rod, the first current collector rod is connected with the first notch, and the second current collector rod is connected with the second notch.

[0015] According to an embodiment of the present application, the series current collector further comprises a first fixing nut; the first current collector rod and the second current collector rod are both provided with external threads;

[0016] The first current collector rod is embedded into the plurality of the first notches arranged in a row, and the first fixing nut is arranged on both sides of each of the first connecting plates, and the corresponding first connecting plate is pressed by the screwing of the first fixing nut and the first current collector rod.

[0017] The second current collector rod is embedded into the plurality of the second notches arranged in a row, and the first fixing nut is arranged on both sides of each of the second connecting plates, and the corresponding second connecting plate is pressed by the screwing of the first fixing nut and the second current collector rod.

[0018] According to an embodiment of the present application, the series current collector further comprises a plurality of electric connecting plates;

[0019] Two adjacent electrochemical units are connected in series by the electric connecting plates.

[0020] According to an embodiment of the present application, a plurality of the electric connecting plates are arranged in a row from top to bottom;

[0021] One end of the electric connecting plate is provided with a first sliding groove, and a plurality of the first sliding grooves are correspondingly arranged from top to bottom; the other end of the electric connecting plate is provided with a second sliding groove, and a plurality of the second sliding grooves are correspondingly arranged from top to bottom;

[0022] The first current collector rod is embedded into the plurality of the first sliding grooves, and the second current collector rod is embedded into the plurality of the second sliding grooves.

[0023] The electric connection piece is connected with the first connection piece of one of the electrochemical units at one end of a first sliding groove, and is connected with the second connection piece of the adjacent other electrochemical unit at one end of a second sliding groove.

[0024] According to one embodiment of the present application, the parallel current collector comprises a second fixing nut and third and fourth current collector rods made of conductive material; the third and fourth current collector rods are each provided with external threads;

[0025] The third current collector rod is embedded in the plurality of first notches arranged in a row, and a second fixing nut is arranged on the upper and lower sides of each first connection piece, and the corresponding first connection piece is pressed by screwing the second fixing nut and the third current collector rod.

[0026] The fourth current collector rod is embedded in the plurality of second notches arranged in a row, and a second fixing nut is arranged on the upper and lower sides of each second connection piece, and the corresponding second connection piece is pressed by screwing the second fixing nut and the fourth current collector rod.

[0027] According to one embodiment of the present application, the support comprises a bottom plate, a top plate and a connecting rod, the top plate and the bottom plate are arranged in an upper and lower spaced manner, a containing space is formed between the top plate and the bottom plate, and the stack is arranged in the containing space;

[0028] The top plate and the bottom plate are connected by the connecting rod.

[0029] According to one embodiment of the present application, the lower end of the connecting rod is connected with the bottom plate, and the upper end of the connecting rod penetrates through the top plate and is connected with a nut to press the stack between the top plate and the bottom plate.

[0030] The electrochemical reaction device provided by the present application comprises a support, a stack, a series current collector and a parallel current collector, the stack is arranged in the support, the electrochemical unit comprises a cathode plate, an anode plate, an electrode and an ion exchange membrane, the cathode plate and the anode plate are electrically connected by the electrode and the ion exchange membrane, each cathode plate is connected with a first connecting piece, and each anode plate is connected with a second connecting piece; the first connecting piece can be detachably connected with the series current collector and the parallel current collector, and the second connecting piece can be detachably connected with the series current collector and the parallel current collector. Therefore, when the series connection and the parallel connection of the electrochemical reaction device are switched, it is only necessary to switch the first connecting piece and the second connecting piece to be connected with the series current collector or the parallel current collector, without the need to disassemble the stack, thereby reducing the disassembly cost and making the series connection and the parallel connection of the electrochemical reaction device more simple and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the above-mentioned purpose, features and advantages of the present application, the following will be further described in detail in conjunction with the accompanying drawings and specific embodiments. In the case of no conflict, the embodiments and the features in the embodiments of the present application can be combined with each other. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Figure 1 The perspective view of the electrochemical reaction device provided by an embodiment of the present application is shown in the figure.

[0033] Figure 2 The structure schematic diagram of the series current collector provided by an embodiment of the present application is shown in the figure.

[0034] Figure 3 The perspective view of the electrochemical reaction device provided by another embodiment of the present application is shown in the figure.

[0035] Figure 4 The structure schematic diagram of the third current collector provided by the present application is shown in the figure.

[0036] Figure 5 The side view of the electrochemical reaction device provided by an embodiment of the present application is shown in the figure.

[0037] Figure 6 The A part of the figure is shown in the enlarged view. Figure 5

[0038] Figure legend: 1-electrochemical reaction device; 11-bracket; 111-top plate; 112-bottom plate; 113-linkage; 12-electric pile; 121-cathode plate; 1211-first connecting sheet; 1212-first notch; 122-anode plate; 1221-second connecting sheet; 1222-second notch; 123-insulating plate; 13-series current collector; 131-first current collector rod; 132-second current collector rod; 133-first fixed nut; 134-electric connecting sheet; 14-parallel current collector; 141-third current collector rod; 142-fourth current collector rod; 143-second fixed nut. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the above-mentioned purpose, features and advantages of the present application, the following will be further described in detail in conjunction with the accompanying drawings and specific embodiments. In the case of no conflict, the embodiments and the features in the embodiments of the present application can be combined with each other. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0040] As​Figures 1 to 6 The utility model provides a kind of electrochemical reaction device, including support 11, electric pile 12, series current collector 13 and parallel current collector 14, the electric pile 12 is located in the support 11;The electric pile 12 includes by upper to lower sequentially arranged multiple groups of electrochemical unit, and the insulating plate 123 is equipped between adjacent two electrochemical units;The electrochemical unit includes cathode plate 121, anode plate 122, electrode and ion exchange membrane, the cathode plate 121 and the anode plate 122 are connected by electrode and ion exchange membrane, each first connecting piece is connected to the cathode plate 121, and each second connecting piece is connected to the anode plate 122;The first connecting piece can be detachably connected with the series current collector 13 and the parallel current collector 14, and the second connecting piece can be detachably connected with the series current collector 13 and the parallel current collector 14.

[0041] The electric pile 12 includes multiple electrochemical units, and each electrochemical unit includes a cathode plate 121, an anode plate 122, an electrode and an ion exchange membrane. The cathode plate 121 and the anode plate 122 of the same battery unit are provided with three sealing gaskets (one cathode electrode, one ion exchange membrane and one anode electrode are respectively placed inside). The cathode plate 121 and the anode plate 122 are connected and conducted through the cathode electrode, the anode electrode and the ion exchange membrane. The existing electrochemical reaction device 1 needs to be disassembled when switching in series and in parallel, which is very inconvenient to operate, and the electrode and the ion exchange membrane are easily damaged during disassembly.

[0042] Therefore, the electrochemical reaction device 1 provided by the embodiment comprises a support 11, a stack 12, a series current collector 13 and a parallel current collector 14, the stack 12 is arranged in the support 11, the stack 12 comprises a plurality of groups of electrochemical units arranged in sequence from top to bottom, and the adjacent two electrochemical units are provided with the insulating plate 123, the electrochemical unit comprises a cathode plate 121, an anode plate 122, an electrode and an ion exchange film, the cathode plate 121 and the anode plate 122 are electrically connected through the electrode and the ion exchange film, each cathode plate 121 is connected with a first connecting piece, and each anode plate 122 is connected with a second connecting piece; the first connecting piece can be detachably connected with the series current collector 13 and the parallel current collector 14, and the second connecting piece can be detachably connected with the series current collector 13 and the parallel current collector 14. Since the first connecting piece is connected to the cathode plate 121 and the second connecting piece is connected to the anode plate 122 in the application, when the electrochemical reaction device 1 is connected in series, only the first connecting piece and the second connecting piece need to be connected with an external power supply through the series current collector 13. When the electrochemical reaction device 1 needs to be connected in parallel, only the series current collector 13 needs to be removed, and then the first connecting piece and the second connecting piece are connected with the external power supply through the parallel current collector 14, without disassembling the stack 12, thereby reducing the disassembly cost and making the series-parallel switching of the electrochemical reaction device 1 more simple and efficient.

[0043] According to one embodiment of the present application, as shown in Figure 1 、 Figure 3 、 Figure 5 and Figure 6 , the first connecting piece 1211 comprises a first connecting plate 1211, one end of the first connecting plate 1211 is connected with the corresponding cathode plate 121, the other end forms a first connecting lug, and the connecting part comprises a first notch 1212 arranged at the first connecting lug; the second connecting piece 1221 comprises a second connecting plate 1221, one end of the second connecting plate 1221 is connected with the corresponding anode plate 122, the other end forms a second connecting lug, and the connecting part comprises a second notch 1222 arranged at the second connecting lug.

[0044] According to one embodiment of the present application, as shown in Figure 1 、 Figure 3 and Figure 5 , a plurality of first connecting plates 1211 are arranged in a row from top to bottom on one side of the electrochemical reaction device 1, and the first notches 1212 of the plurality of first connecting plates 1211 are sequentially corresponding from top to bottom; a plurality of second connecting plates 1221 are arranged in a row from top to bottom on the other side of the electrochemical reaction device 1, and the second notches 1222 of the plurality of second connecting plates 1221 are sequentially corresponding from top to bottom.

[0045] According to one embodiment of the utility model, as shown in Figure 1 and Figure 2 The series current collector 13 includes a first current collecting rod 131 and a second current collecting rod 132, the first current collecting rod 131 is connected with the first aperture 1212, and the second current collecting rod 132 is connected with the second aperture 1222; in the embodiment, a plurality of first connecting pieces 1211 are arranged in a row from top to bottom, and the first apertures 1212 of the plurality of first connecting pieces 1211 are also sequentially corresponding from top to bottom, so that the first current collecting rod 131 can be placed into the plurality of first apertures 1212, and the preliminary connection positioning is realized through the cooperation of the first apertures 1212 and the first current collecting rod 131.

[0046] According to one embodiment of the utility model, as shown in Figure 1 and Figure 2 The current collecting assembly further includes a first fixing nut 133; the first current collecting rod 131 and the second current collecting rod 132 are both provided with external threads; the first current collecting rod 131 is embedded into the plurality of first apertures 1212 arranged in a row, and the first fixing nut 133 is arranged on the upper and lower sides of each first connecting piece 1211, and the corresponding first connecting piece 1211 is pressed tightly through the screwing of the first fixing nut 133 and the first current collecting rod 131; the second current collecting rod 132 is embedded into the plurality of second apertures 1222 arranged in a row, and the first fixing nut 133 is arranged on the upper and lower sides of each second connecting piece 1221, and the corresponding second connecting piece 1221 is pressed tightly through the screwing of the first fixing nut 133 and the second current collecting rod 132.

[0047] According to one embodiment of the utility model, as shown in Figure 1And Figure 2 As shown, the series busbar 13 further comprises a plurality of electrical connection pieces 134; two adjacent electrochemical units are connected in series by the electrical connection pieces 134. Specifically, the plurality of electrical connection pieces 134 are arranged in a row from top to bottom; one end of the electrical connection piece 134 is provided with a first sliding groove, and a plurality of first sliding grooves are correspondingly provided from top to bottom; the other end of the electrical connection piece 134 is provided with a second sliding groove, and a plurality of second sliding grooves are correspondingly provided from top to bottom; the first busbar 131 is embedded in a plurality of first sliding grooves, and the second busbar 132 is embedded in a plurality of second sliding grooves; one end of the electrical connection piece 134 provided with the first sliding groove is connected with the first connecting piece 1211 of one electrochemical unit, and the other end of the electrical connection piece 134 provided with the second sliding groove is connected with the second connecting piece 1221 of the adjacent another electrochemical unit.

[0048] When the electrochemical reaction device 1 needs to be connected in series, the first busbar 131 is placed into a plurality of first notches 1212, and the second busbar 132 is placed into a plurality of second notches 1222, to realize the preliminary positioning of the first busbar 131 and the second busbar 132; the first busbar 131 is embedded in a plurality of first sliding grooves, and the second busbar 132 is embedded in a plurality of second sliding grooves; one end of the electrical connection piece 134 provided with the first sliding groove is connected with the first connecting piece 1211 of one electrochemical unit, and the other end of the electrical connection piece 134 provided with the second sliding groove is connected with the second connecting piece 1221 of the adjacent another electrochemical unit; then the first fixing nut 133 on the upper and lower sides of each first connecting piece 1211 is tightened, and the first fixing nut 133 on the upper and lower sides of each second connecting piece 1221 is tightened, to realize the fixation of the first connecting piece 1211 and the first busbar 131 by the first fixing nut 133, and the fixation of the second connecting piece 1221 and the second busbar 132 by the first fixing nut 133. The positive electrode of the external power supply is connected with the uppermost first connecting piece 1211, and the negative electrode of the external power supply is connected with the lowermost second connecting piece 1221, because the nut is made of metal material, such as Figure 2 Figure 6 As shown, the plurality of first connecting pieces 1211 on the same side are connected in sequence by the first fixing nut 133 and the electrical connection piece 134, that is, two first connecting pieces 1211 are connected by the first fixing nut 133 and the electrical connection piece 134; similarly, the plurality of second connecting pieces 1221 on the same side are connected by the first fixing nut 133 and the electrical connection piece 134, to realize the series connection of the plurality of electrochemical units.

[0049] As shown, Figure 3 Figure 4 ​​As shown, the parallel current collector 14 includes a second fixed nut 143 and a third current collector rod 141 and a fourth current collector rod 142 made of conductive material; the third current collector rod 141 and the fourth current collector rod 142 are both provided with external threads; the third current collector rod 141 is embedded in a plurality of the first notches 1212 arranged in a row, and a second fixed nut 143 is arranged on the upper and lower sides of each first connecting piece 1211, and the corresponding first connecting piece 1211 is pressed by the screwing of the second fixed nut 143 and the third current collector rod 141; the fourth current collector rod 142 is embedded in a plurality of the second notches 1222 arranged in a row, and a second fixed nut 143 is arranged on the upper and lower sides of each second connecting piece 1221, and the corresponding second connecting piece 1221 is pressed by the screwing of the second fixed nut 143 and the fourth current collector rod 142.

[0050] When the electrochemical reaction device 1 is switched in parallel, the first fixed nut 133 on the upper and lower sides of each first connecting piece 1211 and second connecting piece 1221 is manually loosened, and then the first current collector rod 131 is taken out of the first notch 1212, and the second current collector rod 132 is taken out of the second notch 1222. Then the third current collector rod 141 can be placed into a plurality of first notches 1212, and the fourth current collector rod 142 is placed into a plurality of second notches 1222, to achieve the preliminary positioning of the third current collector rod 141 and the fourth current collector rod 142, and then the second fixed nut 143 on the upper and lower sides of each first connecting piece 1211 is tightened, and the second fixed nut 143 on the upper and lower sides of each second connecting piece 1221 is tightened, to fix the first connecting piece 1211 with the third current collector rod 141 and the second connecting piece 1221 with the fourth current collector rod 142 by the second fixed nut 143. The third current collector rod 141 and the fourth current collector rod 142 are made of conductive material, such as copper, iron and other conductive metals; the positive pole of the external power source is connected to the lower end of the third current collector rod 141, and the negative pole of the power source is connected to the upper end of the fourth current collector rod 142, each electrochemical unit is independently connected through the third current collector rod 141 and the fourth current collector rod 142, and the third current collector rod 141 and the fourth current collector rod 142 supply power to a plurality of electrochemical units in series.

[0051] According to an embodiment of the present application, as shown in Figure 1 , Figure 3 and Figure 5 , the bracket 11 includes a bottom plate 112, a top plate 111 and a connecting rod 113, the top plate 111 and the bottom plate 112 are arranged in an upper and lower spaced manner, a containing space is formed between the top plate 111 and the bottom plate 112, and the stack 12 is arranged in the containing space; the top plate 111 and the bottom plate 112 are connected through the connecting rod 113. Among them, as shown in Figure 1 and Figure 3As shown, the lower end of the connecting rod 113 is connected with the bottom plate 112, and the upper end of the connecting rod 113 is connected with a nut through the top plate 111 to press the stack 12 between the top plate 111 and the bottom plate 112. Preferably, a plurality of connecting rods 113 are arranged at the edge positions of the top plate 111 and the bottom plate 112 to better fix the top plate 111 and the bottom plate 112.

[0052] In the description of the present application, it should be pointed out that the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "communication", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct communication, or indirect communication through intermediate medium, or communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0054] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electrochemical reaction device, characterized in that, The application relates to a fuel cell system, which comprises a support (11), a stack (12), a series current collector (13) and a parallel current collector (14), wherein the stack (12) is arranged in the support (11); the stack (12) comprises a plurality of groups of electrochemical units arranged from top to bottom, and an insulating plate (123) is arranged between adjacent two electrochemical units; each electrochemical unit comprises a cathode plate (121), an anode plate (122), an electrode and an ion exchange film, the cathode plate (121) and the anode plate (122) are electrically connected through the electrode and the ion exchange film, each cathode plate (121) is connected with a first connecting piece, and each anode plate (122) is connected with a second connecting piece; the first connecting piece can be detachably connected with the series current collector (13) and the parallel current collector (14), and the second connecting piece can be detachably connected with the series current collector (13) and the parallel current collector (14). The first connecting piece comprises a first connecting sheet (1211), one end of the first connecting sheet (1211) is connected with a corresponding cathode plate (121), the other end forms a first connecting lug, and a first notch (1212) is arranged at the first connecting lug; the second connecting piece comprises a second connecting sheet (1221), one end of the second connecting sheet (1221) is connected with a corresponding anode plate (122), the other end forms a second connecting lug, and a second notch (1222) is arranged at the second connecting lug. A plurality of first connecting sheets (1211) are arranged in a row from top to bottom on one side of the stack, and the first notches (1212) of the plurality of first connecting sheets (1211) are sequentially corresponded from top to bottom; a plurality of second connecting sheets (1221) are arranged in a row from top to bottom on the other side of the stack, and the second notches (1222) of the plurality of second connecting sheets (1221) are sequentially corresponded from top to bottom. The series current collector (13) comprises an insulating first current collector rod (131) and a second current collector rod (132), the first current collector rod (131) is connected with the first notch (1212), and the second current collector rod (132) is connected with the second notch (1222). The series current collector (13) further comprises a first fixing nut (133); the first current collector rod (131) and the second current collector rod (132) are both provided with external threads; 2. The electrochemical reactor of claim 1, wherein The first current collector rod (131) is embedded into the plurality of first notches (1212) arranged in a row, and the first fixing nut (133) is arranged on the upper and lower sides of each first connecting sheet (1211), and the corresponding first connecting sheet (1211) is pressed and fixed through the screwing of the first fixing nut (133) and the first current collector rod (131); The second current collector rod (132) is embedded into the plurality of second notches (1222) arranged in a row, and the first fixing nut (133) is arranged on the upper and lower sides of each second connecting sheet (1221), and the corresponding second connecting sheet (1221) is pressed and fixed through the screwing of the first fixing nut (133) and the second current collector rod (132).

3. The electrochemical reactor of claim 2, wherein, ​ ​ 4. The electrochemical reactor of claim 3, wherein ​ 5. The electrochemical reactor of claim 4, wherein ​ ​ ​ 6. The electrochemical reactor of claim 5, wherein, The series busbar (13) further comprises a plurality of electric connecting pieces (134); Two adjacent electrochemical units are connected in series by the electric connecting pieces (134).

7. The electrochemical reactor of claim 6, wherein The plurality of electric connecting pieces (134) are arranged in a row from top to bottom. One end of the electric connecting piece (134) is provided with a first sliding groove, and a plurality of first sliding grooves are correspondingly provided from top to bottom. The other end of the electric connecting piece (134) is provided with a second sliding groove, and a plurality of second sliding grooves are correspondingly provided from top to bottom. The first busbar (131) is embedded in the plurality of first sliding grooves, and the second busbar (132) is embedded in the plurality of second sliding grooves. The end of the electric connecting piece (134) provided with the first sliding groove is connected with the first connecting piece (1211) of one electrochemical unit, and the end of the electric connecting piece (134) provided with the second sliding groove is connected with the second connecting piece (1221) of the adjacent another electrochemical unit.

8. The electrochemical reactor of claim 3, wherein, The parallel busbar (14) comprises a second fixing nut (143) and third and fourth busbars (141) and (142) made of conductive material, and the third and fourth busbars (141) and (142) are both provided with external threads. The third busbar (141) is embedded in the plurality of first notches (1212) arranged in a row, and a second fixing nut (143) is arranged on the upper and lower sides of each first connecting piece (1211), and the corresponding first connecting piece (1211) is pressed by the screwing of the second fixing nut (143) and the third busbar (141). The fourth busbar (142) is embedded in the plurality of second notches (1222) arranged in a row, and a second fixing nut (143) is arranged on the upper and lower sides of each second connecting piece (1221), and the corresponding second connecting piece (1221) is pressed by the screwing of the second fixing nut (143) and the fourth busbar (142).

9. The electrochemical reactor of any one of claims 1 to 8, wherein, The bracket (11) comprises a bottom plate (112), a top plate (111) and a connecting rod (113), the top plate (111) and the bottom plate (112) are arranged in a spaced manner, and a containing space is formed between the top plate (111) and the bottom plate (112), and the stack (12) is arranged in the containing space. The top plate (111) and the bottom plate (112) are connected by the connecting rod (113).

10. The electrochemical reactor of claim 9, wherein, The lower end of the connecting rod (113) is connected with the bottom plate (112), and the upper end of the connecting rod (113) penetrates through the top plate (111) and is connected with a nut to press the stack (12) between the top plate (111) and the bottom plate (112).

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