Polar plate, battery module and electric pile

Abstract

The utility model provides a polar plate, a battery module and an electric pile, one surface of the polar plate is provided with a liquid inlet, a liquid inlet confluence groove, a plurality of water flow channels and a liquid outlet which are communicated in sequence, the plurality of water flow channels are distributed at intervals along the width direction of the polar plate, the water flow channels extend along the length direction of the polar plate, and the liquid outlet is communicated with the liquid inlet confluence groove. The ends, close to the liquid inlet, of the multiple water flow channels are communicated with the liquid inlet confluence groove, the pole plate is further provided with a defoaming channel, one end of the defoaming channel is communicated with the liquid inlet confluence groove, the other end of the defoaming channel extends to the other surfaces, except the surface provided with the water flow channels, of the pole plate, and the defoaming channel is used for water flow circulation. According to the scheme, the problems that in the prior art, small bubbles in the water inlet confluence groove are easily gathered to form long bubbles, the formation of the long bubbles hinders the smoothness of water flow entering the water flow channel, and the gas production rate is possibly affected due to insufficient reaction raw materials can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery stacks, and in particular to a polar plate, a battery module and a battery stack. Background Art

[0002] The battery module usually includes an anode plate, a membrane electrode assembly and a cathode plate stacked in sequence, and a water inlet, a water inlet confluence groove, a water flow channel and a water outlet are arranged on one side of the anode plate close to the membrane electrode assembly, wherein a plurality of water flow channels are arranged at intervals, one end of the plurality of water flow channels is respectively connected to the water inlet confluence groove, and the other end of the plurality of water flow channels is respectively connected to the water outlet. However, through the above-mentioned anode plate, small bubbles in the water inlet confluence groove are easily aggregated to form long bubbles, and the formation of long bubbles hinders the smoothness of water flow entering the water flow channel, and there may be a situation where insufficient reaction raw materials affect the gas production. Utility Model Content

[0003] The utility model provides a polar plate, a battery module and a battery stack to solve the problem in the prior art that small bubbles in a water inlet confluence trough easily aggregate to form long bubbles, and the formation of long bubbles hinders the smoothness of water flow into a water flow channel, which may cause insufficient reaction raw materials and affect gas production.

[0004] According to one aspect of the utility model, a pole plate is provided, on one surface of the pole plate, a liquid inlet, a liquid inlet confluence groove, a water flow channel and a liquid outlet which are connected in sequence are arranged, a plurality of water flow channels are arranged, the plurality of water flow channels are spaced apart along the width direction of the pole plate, the water flow channels extend along the length direction of the pole plate, one end of the plurality of water flow channels close to the liquid inlet are respectively connected with the liquid inlet confluence groove, the pole plate is also provided with a defoaming channel, one end of the defoaming channel is connected with the liquid inlet confluence groove, the other end of the defoaming channel extends to other surfaces of the pole plate except the surface where the water flow channel is arranged, and the defoaming channel is used for supplying water flow.

[0005] Furthermore, one end of the defoaming channel away from the liquid inlet confluence groove extends to the end surface of the electrode plate.

[0006] Furthermore, one end of the liquid inlet away from the liquid inlet confluence groove and one end of the defoaming channel away from the liquid inlet confluence groove extend to the same end surface of the electrode plate, and the defoaming channel is connected to the bottom of the liquid inlet confluence groove.

[0007] Furthermore, the liquid inlet and the defoaming channel are distributed along the thickness direction of the electrode plate, and the defoaming channel is located on a side of the liquid inlet away from the surface of the electrode plate where the water flow channel is provided.

[0008] Furthermore, the extension direction of the liquid inlet confluence groove is the same as the width direction of the electrode plate.

[0009] Furthermore, along the width direction of the electrode plate, the size of one end of the defoaming channel connected to the liquid inlet confluence groove is the same as the size of the liquid inlet confluence groove.

[0010] Furthermore, a liquid outlet confluence groove is also provided on the electrode plate, and the liquid outlet confluence groove is arranged between multiple water flow channels and the liquid outlet. One end of the liquid outlet confluence groove is respectively connected to one end of the multiple water flow channels away from the liquid inlet confluence groove, and the other end of the liquid outlet confluence groove is connected to the liquid outlet.

[0011] Furthermore, the extension direction of the liquid outlet confluence groove is the same as the width direction of the electrode plate.

[0012] According to another aspect of the present invention, a battery module is provided, comprising an anode plate, a membrane electrode assembly and a cathode plate stacked in sequence, wherein the anode plate is the above-mentioned electrode plate, and a surface of the electrode plate provided with a water flow channel is arranged toward the membrane electrode assembly.

[0013] According to another aspect of the present invention, a battery stack is provided, which includes the above-mentioned electrode plate.

[0014] The technical solution of the utility model is applied, and the defoaming channel is used for water circulation. The water in the defoaming channel flows into the liquid inlet confluence groove and impacts with the water flowing into the liquid inlet confluence groove from the liquid inlet port, which reduces the possibility of long bubbles forming in the liquid inlet confluence groove, reduces the situation where long bubbles hinder the water from flowing into the water flow channel, and improves the smoothness of water entering the water flow channel. In the traditional technical solution, small bubbles are easily generated in the liquid inlet confluence groove, and long bubbles are easily generated after small bubbles gather, and the formation of long bubbles hinders the smoothness of water entering the water flow channel. The plate in the traditional technical solution is prone to insufficient supply of raw materials in the reaction zone and reduced gas production, thereby affecting the performance of the battery module. Compared with the traditional technical solution, the setting of this solution can reduce the possibility of long bubbles forming in the liquid inlet confluence groove, improve the smoothness of water entering the water flow channel, ensure the sufficient supply of raw materials in the reaction zone as much as possible, and improve the performance of the battery module. In addition, the setting of this solution has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A schematic diagram showing the structure of the electrode plate provided by an embodiment of the utility model is shown;

[0017] Figure 2 An axonometric view of a pole plate provided by an embodiment of the utility model is shown;

[0018] Figure 3A cross-sectional view of a plate provided by an embodiment of the utility model is shown;

[0019] Figure 4 A schematic structural diagram of multiple battery modules provided by an embodiment of the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 01. first surface; 02. first end surface;

[0022] 11. Liquid inlet; 12. Liquid inlet confluence groove; 13. Water flow channel; 14. Liquid outlet; 15. Defoaming channel; 16. Liquid outlet confluence groove;

[0023] 20. Anode plate;

[0024] 30. Membrane electrode assembly;

[0025] 40. Cathode plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figures 1 to 3 As shown, embodiment 1 of the utility model provides a pole plate, on one surface of the pole plate, a liquid inlet 11, a liquid inlet confluence groove 12, a water flow channel 13 and a liquid outlet 14 which are connected in sequence are arranged, a plurality of water flow channels 13 are arranged, and the plurality of water flow channels 13 are spaced apart along the width direction of the pole plate, and the water flow channels 13 extend along the length direction of the pole plate, and one end of the plurality of water flow channels 13 close to the liquid inlet 11 is respectively connected with the liquid inlet confluence groove 12, and the pole plate is also provided with a defoaming channel 15, one end of the defoaming channel 15 is connected with the liquid inlet confluence groove 12, and the other end of the defoaming channel 15 extends to other surfaces of the pole plate except the surface where the water flow channel is arranged, and the defoaming channel 15 is used for supplying water flow.

[0028] By applying the technical solution of the utility model, the defoaming channel 15 is used for water circulation. The water in the defoaming channel 15 flows into the liquid inlet confluence groove 12 and impacts with the water flowing into the liquid inlet confluence groove 12 from the liquid inlet 11, reducing the possibility of long bubbles forming in the liquid inlet confluence groove 12, reducing the situation where long bubbles hinder the water from flowing into the water flow channel 13, and improving the smoothness of water entering the water flow channel 13. In the traditional technical solution, small bubbles are easily generated in the liquid inlet confluence groove 12, and long bubbles are easily generated after small bubbles gather, and the formation of long bubbles hinders the smoothness of water entering the water flow channel 13. The electrode plate in the traditional technical solution is prone to insufficient supply of raw materials in the reaction zone and reduced gas production, thereby affecting the performance of the battery module. Compared with the traditional technical solution, the setting of this solution can reduce the possibility of long bubbles forming in the liquid inlet confluence groove 12, improve the smoothness of water flow entering the water flow channel 13, ensure the sufficient supply of raw materials in the reaction zone as much as possible, and improve the performance of the battery module. Moreover, the arrangement of this solution has a simple structure. Moreover, the electrode plate of this solution can adjust the flow rate of water in the water flow channel 13 according to the actual working conditions of the battery module, thereby improving the adaptability of this solution.

[0029] In this embodiment, the electrode plate is roughly a rectangular plate structure, and includes a first surface 01 and a second surface arranged opposite to each other along the thickness direction. The liquid inlet 11, the liquid inlet confluence groove 12, the water flow channel 13 and the liquid outlet 14 are all arranged on the first surface 01.

[0030] Furthermore, one end of the defoaming channel 15 away from the liquid inlet confluence groove 12 extends to the end surface of the electrode plate. This arrangement can improve the convenience of injecting water into the defoaming channel 15.

[0031] In this embodiment, the electrode plate includes a first end face 02, a second end face, a third end face and a fourth end face arranged in sequence along the circumferential direction, the first end face 02 and the third end face are parallel to each other and extend along the width direction of the electrode plate, the second end face and the fourth end face are parallel to each other and extend along the length direction of the electrode plate. The liquid inlet 11, the liquid inlet confluence groove 12, the water flow channel 13 and the liquid outlet 14 are distributed along the direction from the first end face 02 to the third end face.

[0032] In this embodiment, the end of the liquid inlet 11 away from the liquid inlet confluence groove 12 and the end of the defoaming channel 15 away from the liquid inlet confluence groove 12 both extend to the first end surface 02 of the electrode plate. This arrangement can further improve the convenience of injecting water into the defoaming channel 15.

[0033] In other embodiments of the present scheme, one end of the liquid inlet 11 away from the liquid inlet confluence groove 12 extends to the first end surface 02 of the electrode plate, and one end of the defoaming channel 15 away from the liquid inlet confluence groove 12 extends to the second end surface, the third end surface, the fourth end surface or the second surface.

[0034] Further, the liquid inlet 11 and the defoaming channel 15 are distributed along the thickness direction of the electrode plate, and the defoaming channel 15 is located on the side of the liquid inlet 11 away from the surface of the electrode plate provided with the water flow channel 13. In this embodiment, the liquid inlet 11 is a slot-shaped opening, and a first opening is formed on the side of the liquid inlet 11 facing the first surface 01. The defoaming channel 15 is located on the side of the liquid inlet 11 away from the first opening.

[0035] In this embodiment, the liquid inlet 11 and the defoaming channel 15 are both extended along the length direction of the electrode plate. In this way, the electrode plate of this solution can be formed without changing the main structure of the electrode plate in the prior art solution, and the structural design is relatively reasonable.

[0036] In this embodiment, the extending direction of the liquid inlet confluence groove 12 is the same as the width direction of the electrode plate. This arrangement can improve the uniformity of water in the liquid inlet confluence groove 12 flowing into each water flow channel 13.

[0037] Furthermore, along the width direction of the electrode plate, the size of one end of the defoaming channel 15 connected to the liquid inlet confluence groove 12 is the same as the size of the liquid inlet confluence groove 12. This arrangement can improve the uniformity of the water in the defoaming channel 15 flowing into the liquid inlet confluence groove 12, improve the disturbance effect on the water flow in the liquid inlet confluence groove 12, and reduce the possibility of long bubbles being generated.

[0038] In this embodiment, the defoaming channel 15 has the same dimensions along the length direction and width direction of the electrode plate. This arrangement makes it easy to control the speed of the water flow in the defoaming channel 15 and to process and shape the defoaming channel 15.

[0039] Furthermore, the electrode plate is also provided with a liquid outlet confluence groove 16, which is provided between the plurality of water flow channels 13 and the liquid outlet 14, and the extension direction of the liquid outlet confluence groove 16 is the same as the width direction of the electrode plate, one end of the liquid outlet confluence groove 16 is respectively connected with one end of the plurality of water flow channels 13 away from the liquid inlet confluence groove 12, and the other end of the liquid outlet confluence groove 16 is connected with the liquid outlet 14. The provision of the liquid outlet confluence groove 16 facilitates the discharge of water flow.

[0040] In this embodiment, the liquid outlet 14 is a groove-shaped structure, and a second opening is formed in the direction of the liquid outlet 14 toward the first surface 01 .

[0041] like Figure 4 As shown, the second embodiment of the utility model provides a battery module, including an anode plate 20, a membrane electrode assembly 30 and a cathode plate 40 stacked in sequence, the anode plate 20 is the electrode plate of the above embodiment, and the surface of the electrode plate provided with the water flow channel 13 is arranged toward the membrane electrode assembly 30.

[0042] The third embodiment of the present invention provides a battery stack, which includes the electrode plate in the first embodiment.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A plate, characterized in that: A liquid inlet (11), a liquid inlet confluence groove (12), a water flow channel (13) and a liquid outlet (14) are provided on one surface of the electrode plate, and the water flow channels (13) are provided in plurality. The plurality of water flow channels (13) are spaced apart along the width direction of the electrode plate, and the water flow channels (13) extend along the length direction of the electrode plate. One end of the plurality of water flow channels (13) close to the liquid inlet (11) is respectively connected to the liquid inlet confluence groove (12). The electrode plate is also provided with a defoaming channel (15), one end of the defoaming channel (15) is connected to the liquid inlet confluence groove (12), and the other end of the defoaming channel (15) extends to other surfaces of the electrode plate except the surface provided with the water flow channel, and the defoaming channel (15) is used for water flow.

2. The electrode plate according to claim 1, characterized in that: One end of the defoaming channel (15) away from the liquid inlet confluence groove (12) extends to the end surface of the electrode plate.

3. The electrode plate according to claim 2, characterized in that: One end of the liquid inlet (11) away from the liquid inlet confluence groove (12) and one end of the defoaming channel (15) away from the liquid inlet confluence groove (12) extend to the same end surface of the electrode plate, and the defoaming channel (15) is connected to the bottom of the liquid inlet confluence groove (12).

4. The electrode plate according to claim 3, characterized in that: The defoaming channel (15) is located on a side of the liquid inlet (11) away from the surface of the electrode plate provided with the water flow channel (13).

5. The electrode plate according to claim 1, characterized in that: The extension direction of the liquid inlet confluence groove (12) is the same as the width direction of the electrode plate.

6. The electrode plate according to claim 1, characterized in that: Along the width direction of the electrode plate, the size of one end of the defoaming channel (15) that is connected to the liquid inlet confluence groove (12) is the same as the size of the liquid inlet confluence groove (12).

7. The electrode plate according to claim 1, characterized in that: The electrode plate is also provided with a liquid outlet confluence groove (16), which is arranged between the plurality of water flow channels (13) and the liquid outlet (14), one end of the liquid outlet confluence groove (16) is respectively connected to one end of the plurality of water flow channels (13) away from the liquid inlet confluence groove (12), and the other end of the liquid outlet confluence groove (16) is connected to the liquid outlet (14).

8. The electrode plate according to claim 7, characterized in that: The extension direction of the liquid outlet confluence groove (16) is the same as the width direction of the electrode plate.

9. A battery module, characterized in that: It comprises an anode plate (20), a membrane electrode assembly (30) and a cathode plate (40) stacked in sequence, wherein the anode plate (20) is the electrode plate according to any one of claims 1 to 8, and the surface of the electrode plate provided with a water flow channel (13) is arranged toward the membrane electrode assembly (30).

10. A battery stack, characterized in that: The electrode plate comprises the electrode plate according to any one of claims 1 to 8.

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