Battery plate, bipolar plate and battery

Abstract

The invention provides a battery plate, a bipolar plate and a battery, and relates to the technical field of fuel cells. The battery pole plate comprises a pole plate body and a flow distribution structure, a cooling inlet and a cooling outlet are respectively formed in the plate surfaces, close to two ends in the length direction, of the polar plate body, a flow field structure is arranged in the middle of the cooling plate surface of the polar plate body, an inlet flow distribution area is arranged on one side, close to the cooling inlet, of the flow field structure, and an outlet flow distribution area is arranged on one side, close to the cooling outlet, of the flow field structure; the flow distribution structures are provided with multi-stage distribution flow channels, and the two flow distribution structures are arranged in the inlet flow distribution area and the outlet flow distribution area correspondingly, so that the cooling inlet and the cooling outlet communicate with the flow field structure through the two flow distribution structures correspondingly. According to the technical scheme, the technical problem that uniform heat exchange is difficult to realize when cooling water flows through a battery plate in the prior art can be solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel cells, and in particular to a battery plate, a bipolar plate and a battery. Background Art

[0002] As an efficient and environmentally friendly energy conversion device, fuel cells work by directly converting fuel (such as hydrogen) and oxidants (such as oxygen) into electrical energy through electrochemical reactions, while only emitting water and heat, making them an ideal choice to replace traditional internal combustion engines. Fuel cell technology has not only received widespread attention in the automotive industry, but is also considered an important part of future distributed power generation and portable power systems. With its high efficiency, low noise and zero emissions, fuel cells are expected to lead the energy transition and promote the development of a green economy.

[0003] As a core component, the fuel cell stack consists of multiple units, each of which contains key components such as bipolar plates and membrane electrodes. The bipolar plates are not only responsible for distributing reactants and removing byproducts, but also for heat dissipation. Their performance directly affects the overall efficiency and reliability of the fuel cell system.

[0004] However, existing bipolar plate designs face many challenges. When cooling water flows through the bipolar plates, it is often difficult to achieve uniform heat exchange, resulting in local overheating and affecting the service life of the battery. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide a battery plate, a bipolar plate and a battery to solve the problem in the prior art that it is difficult to achieve uniform heat exchange in the battery plate, resulting in local overheating.

[0006] To solve the above technical problems, the present disclosure provides the following technical solutions:

[0007] A first aspect of the present disclosure provides a battery plate, comprising:

[0008] The plate body is provided with a cooling inlet and a cooling outlet on the plate surface of the plate body near the two ends along the length direction, a flow field structure is provided in the middle of the cooling plate surface of the plate body, an inlet flow distribution area is provided on the side of the flow field structure near the cooling inlet, and an outlet flow distribution area is provided on the side of the flow field structure near the cooling outlet;

[0009] The flow distribution structure has a multi-level distribution flow channel, and the two flow distribution structures are respectively arranged in the inlet flow distribution area and the outlet flow distribution area, so that the cooling inlet and the cooling outlet are connected to the flow field structure through the two flow distribution structures respectively.

[0010] Furthermore, the flow distribution structure includes:

[0011] Multiple primary flow channels, multiple secondary flow channels, and multiple tertiary flow channels are arranged sequentially along a first direction in an inlet distribution area, and are arranged sequentially along a second direction opposite to the first direction in an outlet distribution area, and the widths of the primary flow channels, the secondary flow channels, and the tertiary flow channels decrease sequentially.

[0012] Furthermore, the cooling inlet and the cooling outlet are both located near the center of the width direction of the electrode body, and the cooling inlet and the cooling outlet are respectively connected to the inlet flow distribution area and the outlet flow distribution area through two connecting channels, and the connecting channels extend along the length direction of the electrode body;

[0013] The primary flow channel includes:

[0014] The central flow channel and the first sub-flow channel are both extended along the length direction of the electrode body and close to the direction of the flow field structure. One end of the central flow channel is located in the middle of the connecting channel. One end of the plurality of first sub-flow channels is flush with one end of the central flow channel. The plurality of first sub-flow channels are respectively arranged on both sides of the central flow channel along the width direction of the electrode plate. The length of the first sub-flow channel gradually decreases from the central flow channel to the edge of the electrode body in the width direction.

[0015] A second sub-flow channel, wherein a plurality of second sub-flow channels are arranged along the length direction of the electrode plate, the second sub-flow channels are arranged along the width direction of the electrode plate body, and extend in a direction away from the central flow channel, the plurality of second sub-flow channels correspond to at least part of the first sub-flow channels one by one, one end of each second sub-flow channel is connected to the other end of the corresponding first sub-flow channel, and the other end of the second sub-flow channel is arranged in a stepped shape, and the length increases sequentially from the flow field structure to the two ends of the length direction of the electrode plate body;

[0016] The third sub-channel, multiple third sub-channels are arranged along the width direction of the electrode body, the third sub-channels extend along the length direction of the electrode and close to the direction of the distribution structure, multiple third sub-channels correspond one-to-one with multiple second sub-channels, one end of each third sub-channel is connected to the other end of the corresponding second sub-channel, and the other end of the third sub-channel is flush.

[0017] Furthermore, the battery plate also includes:

[0018] A plurality of first blocking portions correspond one to one with a plurality of second sub-channels, each first blocking portion is arranged in the second sub-channel and extends along the length direction of the second sub-channel to separate the second sub-channel into two secondary channels with equal width.

[0019] Furthermore, it also includes:

[0020] A plurality of second blocking portion groups are provided in the second blocking portion group, the extension direction of the second blocking portion is the length direction of the third sub-channel, the plurality of second blocking portion groups correspond to the plurality of third sub-channels one by one, each second blocking portion group is provided in its corresponding third sub-channel, and the plurality of second blocking portions in each second blocking portion group are evenly arranged along the width direction of the battery plate to separate the third sub-channel into a plurality of tertiary channels.

[0021] Furthermore, the battery plate also includes:

[0022] A plurality of basic flow channels are arranged in the connecting channel and located at a side of one end of the first sub-flow channel away from the flow field structure. The plurality of basic flow channels are arranged along the width direction of the electrode body.

[0023] Furthermore, the battery plate also includes:

[0024] The first protrusion structure, a plurality of protrusion structures, are located between the flow distribution structure and the flow field structure and are arranged at intervals along the width direction of the battery plate.

[0025] Furthermore, the battery plate also includes:

[0026] Multiple second protrusion structures correspond one-to-one to multiple second blocking parts, and multiple second protrusion structures are arranged on the side of the corresponding second blocking part away from the flow field structure. Each second protrusion structure and its corresponding second blocking part are spaced apart along the length direction of the plate body.

[0027] A second aspect of the present disclosure provides a bipolar plate, which includes the battery plate provided by the first aspect of the present disclosure.

[0028] A bipolar plate provided in the second aspect of the present disclosure can directly use a battery plate provided in the first aspect. The specific implementation structure can refer to the relevant content described in the first aspect, which will not be repeated here.

[0029] A third aspect of the present disclosure provides a fuel cell, which includes the bipolar plate provided by the second aspect of the present disclosure.

[0030] A fuel cell provided in the third aspect of the present disclosure can directly use a bipolar plate provided in the second aspect. The specific implementation structure can refer to the relevant content described in the second aspect, which will not be repeated here.

[0031] A first aspect of the present disclosure provides a battery plate, which includes: a plate body and a distribution structure, wherein a cooling inlet and a cooling outlet are respectively arranged at both ends of the plate body along the length direction, a flow field structure is arranged in the middle of the cooling plate surface of the plate body, an inlet distribution area is arranged between the flow field structure and the cooling inlet, and an outlet distribution area is arranged between the flow field structure and the cooling outlet; two distribution structures are respectively arranged in the inlet distribution area and the outlet distribution area, and the distribution structure has a multi-stage distribution flow channel, and the multi-stage distribution flow channel can distribute the coolant from the cooling inlet to the distribution structure more evenly, or distribute the coolant more evenly to the cooling outlet through the distribution structure, so that the heat exchange of the battery plate can be more uniform, local overheating can be avoided, and the service life of the battery can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0033] Figure 1 The schematic diagram of the structure of the battery plate is shown schematically;

[0034] Figure 2 The schematic diagram of the structure of the battery plate C portion is shown schematically;

[0035] Figure 3 The structural diagram of the battery plate D portion is schematically shown;

[0036] Description of Figure Numbers:

[0037] 1. Plate body; 11. Cooling inlet; 12. Cooling outlet; 13. Fuel inlet; 14. Fuel outlet; 15. Combustion-supporting inlet; 16. Combustion-supporting outlet; 17. Flow field structure; 18. Communication channel;

[0038] 2. flow distribution structure; 21. primary flow channel; 22. secondary flow channel; 23. tertiary flow channel; 24. central flow channel; 25. direct flow channel; 26. first sub-flow channel; 27. second sub-flow channel; 28. third sub-flow channel; 29. ​​first blocking part; 210. second blocking part; 211. basic flow channel;

[0039] 3. First protruding structure; 4. Second protruding structure; 5. Third protruding structure;

[0040] A. Inlet distribution area; B. Exit distribution area. DETAILED DESCRIPTION

[0041] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0042] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0043] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0044] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0045] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0046] Embodiment 1

[0047] like Figure 1-3As shown, embodiment 1 of the first aspect of the present disclosure provides a battery plate, which includes: a plate body 1 and a distribution structure 2; a cooling inlet 11 and a cooling outlet 12 are respectively arranged on the plate surface of the plate body 1 near the two end positions along the length direction, and a flow field structure 17 is arranged in the middle of the cooling plate surface of the plate body 1, and an inlet distribution area A is arranged on the side of the flow field structure 17 near the cooling inlet 11, and an outlet distribution area B is arranged on the side of the flow field structure 17 near the cooling outlet 12; the distribution structure 2 has a multi-stage distributed flow channel, and the two distribution structures 2 are respectively arranged in the inlet distribution area A and the outlet distribution area B, so that the cooling inlet 11 and the cooling outlet 12 are connected to the flow field structure 17 through the two distribution structures 2 respectively.

[0048] Specifically, the plate body 1 can be a standard fuel cell bipolar plate, which is not specifically limited. The cooling inlet 11 is used to release the coolant into the battery plate, and the cooling outlet 12 is used to recover the coolant flowing through the flow field structure 17. The flow field structure 17 can be provided with multiple flow channels. After the coolant enters from the cooling inlet 11, it enters the multiple flow channels in the flow field structure 17 through the distribution structure 2 to dissipate heat from the battery plate, and then flows into the distribution structure 2 through the multiple flow channels, and finally flows to the cooling outlet 12 through the distribution structure 2.

[0049] The inlet flow distribution area A and the outlet flow distribution area B are two areas respectively arranged between the cooling inlet 11 and the flow distribution structure 2 and between the cooling outlet 12 and the flow distribution structure 2. The two flow distribution structures 2 can be respectively arranged in the inlet flow distribution area A and the outlet flow distribution area B. The flow distribution structure 2 can be composed of a plurality of protrusions extending along the length direction of the plate body 1, and the inlet flow distribution area A and the outlet flow distribution area B are divided into a plurality of areas along the length direction of the plate body 1, and a plurality of protrusions are arranged in each area along the width direction of the plate body 1, and the protrusions between adjacent areas are staggered along the length direction of the plate body 1 to form a multi-stage distribution flow channel of the flow distribution structure 2. The multi-stage distribution flow channel enables the coolant to fully flow to most areas of the inlet flow distribution area A and the outlet flow distribution area B, so that the heat exchange of the battery plate is more uniform, and local overheating can be effectively avoided.

[0050] Embodiment 1 of the first aspect of the present disclosure provides a battery plate, comprising: a plate body 1 and a distribution structure 2, wherein a cooling inlet 11 and a cooling outlet 12 are respectively provided at both ends of the plate body 1 along the length direction, a flow field structure 17 is provided in the middle of the cooling plate surface of the plate body 1, an inlet distribution area A is provided between the flow field structure 17 and the cooling inlet 11, and an outlet distribution area B is provided between the flow field structure 17 and the cooling outlet 12; the two distribution structures 2 are respectively provided in the inlet distribution area A and the outlet distribution area B, and the distribution structure 2 has a multi-stage distribution flow channel, and the multi-stage distribution flow channel can distribute the coolant from the cooling inlet 11 more evenly to the distribution structure 2, or distribute the coolant more evenly to the cooling outlet 12 through the distribution structure 2, so that the heat exchange of the battery plate can be more uniform, local overheating can be avoided, and the service life of the battery can be effectively improved.

[0051] like Figure 1-3 As shown, in some embodiments, the three are arranged sequentially along a first direction in the inlet distribution area A, and the three are arranged sequentially along a second direction opposite to the first direction in the outlet distribution area B, and the widths of the primary flow channel 21, the secondary flow channel 22, and the tertiary flow channel 23 decrease sequentially.

[0052] Specifically, the first direction may be the flow direction of the coolant in the inlet distribution area A. Taking the flow direction of the coolant in the inlet distribution area A as the direction from the cooling inlet 11 to the distribution structure 2 as an example, along the length direction of the plate body 1 and from the cooling inlet 11 to the flow field structure 17, the inlet area is divided into a first area, a second area and a third area, a plurality of primary channels are arranged in the first area along the width direction of the plate body 1, a plurality of secondary channels 22 are arranged in the second area along the width direction of the plate body 1, and a plurality of tertiary channels 23 are arranged in the third area along the width direction of the plate body 1. Similarly, the outlet distribution area B may be split into a fourth area, a fifth area and a sixth area along the direction from the flow field structure 17 to the cooling outlet 12, a plurality of primary channels 21 are arranged in the fourth area along the width direction of the plate body 1, a plurality of secondary channels 22 are arranged in the fifth area along the width direction of the plate body 1, and a plurality of tertiary channels 23 are arranged in the sixth area along the width direction of the plate body 1. Such an arrangement can effectively reduce the flow resistance of the coolant in the distribution structure 2, and at the same time can make the coolant more evenly distributed in the inlet distribution area A and the outlet distribution area B.

[0053] like Figure 1-3As shown, in some embodiments, the cooling inlet 11 and the cooling outlet 12 are both located near the center of the width direction of the electrode body 1, and the cooling inlet 11 and the cooling outlet 12 are respectively connected to the inlet distribution area A and the outlet distribution area B through two connecting channels 18, and the connecting channel 18 extends along the length direction of the electrode body 1; the primary flow channel 21 includes: a central flow channel 24, a first sub-flow channel 26, a second sub-flow channel 27 and a third sub-flow channel 28; the central flow channel 24 and the first sub-flow channel 26 are both along the length direction of the electrode body 1 and extend in the direction close to the flow field structure 17, one end of the central flow channel 24 is located in the middle of the connecting channel 18, one end of the plurality of first sub-flow channels 26 is flush with one end of the central flow channel 24, and the plurality of first sub-flow channels 26 are respectively arranged on both sides of the central flow channel 24 along the width direction of the electrode, and along the central flow channel 24 to the edge of the width direction of the electrode body 1, The length of the first sub-channel 26 gradually decreases; a plurality of second sub-channels 27 are arranged along the length direction of the electrode plate, the second sub-channels 27 are along the width direction of the electrode body 1, and extend in the direction away from the central channel 24, and the plurality of second sub-channels 27 correspond one-to-one with at least part of the first sub-channels 26, one end of each second sub-channel 27 is connected to the other end of the corresponding first sub-channel 26, and the other end of the second sub-channel 27 is arranged in a stepped manner, and the length increases successively from the flow field structure 17 to the two ends of the length direction of the electrode body 1; a plurality of third sub-channels 28 are arranged along the width direction of the electrode body 1, the third sub-channels 28 are along the length direction of the electrode plate, and extend in the direction close to the distribution structure 2, and the plurality of third sub-channels 28 correspond one-to-one with the plurality of second sub-channels 27, one end of each third sub-channel 28 is connected to the other end of the corresponding second sub-channel 27, and the other end of the third sub-channel 28 is flush.

[0054] Specifically, generally speaking, the plate body 1 has a fuel inlet 13, a fuel outlet 14, a combustion-supporting inlet 15, a combustion-supporting outlet 16, a cooling inlet 11 and a cooling outlet 12. The fuel inlet 13 and the combustion-supporting inlet 15 are respectively arranged at both ends of the cooling inlet 11 along the width direction of the plate. The standard fuel inlet 13 is smaller than the combustion-supporting inlet 15, so generally speaking, the cooling inlet 11 is located near the center of the width direction of the plate body 1, but biased towards the fuel inlet 13. The size of the fuel outlet 14 is smaller than the size of the combustion-supporting outlet 16, and the cooling outlet 12 is located near the center of the width direction of the plate body 1, but more biased towards the fuel inlet 13.

[0055] The central flow channel 24 is located in the middle of the connecting channel 18 in the width direction, and one end of the central flow channel 24 and the first sub-flow channel 26 can be located at the opening of the connecting channel 18 near the flow field structure 17. The length of the multiple first sub-flow channels 26 along the edge direction of the width direction of the central flow channel 24 to the plate body 1 gradually decreases, and one end of the first flow channel is flush with one end of the central flow channel 24, so that the other end of the multiple first flow channels is stepped. In this embodiment, in order to meet the size configuration of the plate body 1, in the inlet distribution area A, a straight flow channel 25 can be set on the side of the central flow channel 24 close to the fuel inlet 13. In the outlet distribution area B, a single flow channel can be set on the side of the centerline flow channel close to the fuel outlet 14 to meet the size arrangement of the multi-stage distribution flow channels in the distribution structure 2 in the inlet distribution area A and the outlet distribution area B.

[0056] The number of the plurality of second sub-channels 27 corresponds to the number of the plurality of first sub-channels 26, one end of the plurality of second sub-channels 27 is connected to the other end of the plurality of first sub-channels 26, and a rounded transition can be provided at the connection between the two to reduce the flow resistance of the coolant. Along the direction from the flow field structure 17 to the cooling inlet 11, and from the flow field structure 17 to the cooling outlet 12, the length of the plurality of second sub-channels 27 gradually becomes longer, and the other end of the plurality of second sub-channels 27 forms a step shape. The number of the plurality of third sub-channels 28 corresponds to the plurality of second sub-channels 27, one end of the plurality of third sub-channels 28 is respectively connected to the other end of the plurality of second sub-channels 27, and the third sub-channels 28 are connected to the first sub-channels 28. The connection between the two sub-flow channels 27 can also be set with a rounded transition. Along the central flow channel 24 to the two ends in the width direction of the plate body 1, the length of the multiple third sub-flow channels 28 gradually becomes longer, and the other ends of the multiple third sub-flow channels 28 are flush. The other end of the third sub-flow channel 28 in the inlet distribution area A is provided with an outlet of the third sub-flow channel 28. The outlets of the multiple third sub-flow channels 28 in the inlet distribution area A correspond to the inlets of all the flow channels in the flow field structure 17. The other end of the multiple third sub-flow channels 28 in the outlet distribution area B is the inlet of the third sub-flow channel 28. All the flow channel outlets in the multiple flow field structures 17 are connected with the inlets of the multiple third flow channels in the outlet distribution area B. In this way, the distribution structure 2 can distribute the coolant from the cooling inlet 11 to the flow field structure 17 more evenly, and at the same time, the coolant is more evenly guided to the cooling outlet 12 through the distribution structure 2 to avoid local overheating of the battery plate.

[0057] like Figure 1-3 As shown, in some embodiments, the battery plate also includes: a plurality of first blocking portions 29, the plurality of first blocking portions 29 corresponding one by one to the plurality of second sub-channels 27, each first blocking portion 29 being arranged in the second sub-channel 27 and extending along the length direction of the second sub-channel 27 to separate the second sub-channel 27 into two secondary channels 22 of equal width.

[0058] Specifically, the plurality of first blocking portions 29 may be long strip blocking portions, the extension direction of the first blocking portions 29 is consistent with the length direction of the second sub-channel 27, that is, the width direction of the plate body 1, the number and position of the plurality of first blocking portions 29 and the plurality of second sub-channels 27 correspond one to one, and each first blocking portion 29 is arranged in the middle of the width direction of the corresponding second sub-channel 27 to form two secondary channels 22 in each second sub-channel 27. In this arrangement, the coolant is divided into two parts when passing through the first blocking portion 29, and flows into the two secondary channels 22 respectively. While achieving flow distribution, the flow resistance of the coolant can be limitedly reduced.

[0059] like Figure 1-3 As shown, in some embodiments, the battery plate further includes: a plurality of second blocking portion 210 groups, a plurality of second blocking portions 210 are arranged in the second blocking portion 210 group, the extension direction of the second blocking portion 210 is the length direction of the third sub-channel 28, the plurality of second blocking portion 210 groups correspond one-to-one to the plurality of third sub-channels 28, each second blocking portion 210 group is arranged in its corresponding third sub-channel 28, and the plurality of second blocking portions 210 in each second blocking portion 210 group are evenly arranged along the width direction of the battery plate to separate the third sub-channel 28 into a plurality of tertiary channels 23.

[0060] Specifically, the number and position of the plurality of second blocking portions 210 groups correspond to the plurality of third sub-channels 28 one by one. The specific number of second blocking portions 210 provided in the second blocking portion 210 group can be determined according to the width of the third sub-channel 28, and is not specifically limited thereto. The second blocking portions 210 extend along the length direction of the third sub-channel 28, that is, the length direction of the electrode body 1. The plurality of second blocking portions 210 in each group of second blocking portions 210 are arranged in the third sub-channel 28 along the width direction of the electrode plate, so as to split the plurality of third sub-channels 28 into a plurality of tertiary channels 23. When the coolant passes through the second blocking portion 210, it will be divided into two parts, which can make the coolant distribution more uniform and avoid heat concentration on the battery plate.

[0061] In this embodiment, a plurality of second blocking portions 210 may be provided between the direct flow channel 25 and the third sub-flow adjacent to the direct flow channel to divide the area therebetween into a plurality of tertiary flow channels 23 to accommodate the battery plate size and the spatial arrangement of components.

[0062] like Figure 1-3 As shown, in some embodiments, the battery plate further includes: a plurality of basic flow channels 211, the plurality of basic flow channels 211 are arranged in the connecting channel 18, and are located on a side of the first sub-flow channel 26 away from the flow field structure 17, and the plurality of basic flow channels 211 are arranged along the width direction of the plate body 1.

[0063] Specifically, multiple basic flow channels 211 are arranged in the connecting channel, and the multiple basic flow channels 211 can distribute the coolant flowing out of the cooling inlet 11 more evenly to the distribution structure 2, or distribute the coolant released from the distribution structure 2 more evenly to the cooling outlet 12, while reducing the flow resistance of the coolant.

[0064] In some embodiments, the battery plate further includes: a first protruding structure 3, a plurality of protruding structures are located between the flow distribution structure 2 and the flow field structure 17, and are arranged at intervals along the width direction of the battery plate.

[0065] Specifically, the multiple first protrusion structures 3 can be cylindrical protrusion columns or protrusion square columns, without specific limitation. The first protrusion structures 3 can further divide the coolant flowing through into multiple parts to increase the uniformity of flow distribution and reduce flow resistance.

[0066] like Figure 1-3 As shown, in some embodiments, the battery plate further includes: a plurality of second protrusion structures 4, the plurality of second protrusion structures 4 corresponding one to the plurality of second blocking portions 210, the plurality of second protrusion structures 4 being arranged on a side of the corresponding second blocking portion 210 away from the flow field structure 17, and each second protrusion structure 4 and its corresponding second blocking portion 210 being spaced apart along the length direction of the plate body 1.

[0067] Specifically, the number and position of the plurality of second protrusion structures 4 correspond to the plurality of second blocking portions 210, and the plurality of second protrusion structures 4 may be the same as the first protrusion structure 3, and are not specifically limited thereto. The second protrusion structures 4 may further divide the coolant flowing through the second protrusion structures 4, so that the coolant flowing into the third flow channel is more uniform, and the flow resistance of the coolant is further reduced.

[0068] like Figure 1-3 As shown, in this embodiment, multiple third protruding structures 5 can also be provided, and the third blocking portion can also be the same blocking portion as the first blocking portion 29. Multiple third blocking portions can be provided in the area between the central flow channel 24 and the adjacent third sub-flow channel 28, and multiple third protruding structures 5 are arranged in a rectangular array. The purpose of such a setting is that the area between the central flow and the adjacent third sub-flow channel 28 is small, and the process difficulty of providing the second blocking portion 210 is relatively large. The provision of multiple third protruding structures 5 can make the flow distribution more uniform, and can reduce the process difficulty and cost.

[0069] Embodiment 2

[0070] Embodiment 2 of the second aspect of the present disclosure provides a bipolar plate, which includes the battery plate provided in Embodiment 1 of the first aspect of the present disclosure.

[0071] Specifically, the battery plate described in the second embodiment can directly use the battery plate provided in the first embodiment. The specific implementation structure can refer to the relevant content described in the first embodiment, which will not be repeated here.

[0072] The bipolar plate provided in Example 2 of the second aspect of the present disclosure adopts the battery plate provided in the first aspect of the present disclosure, and the heat exchange of the battery plate is more uniform, so that the bipolar plate provided in Example 2 is heated more evenly while avoiding local heating of the bipolar plate.

[0073] Embodiment 3

[0074] Embodiment 3 of the third aspect of the present disclosure provides a battery, which includes the bipolar plate provided by Embodiment 2 of the second aspect of the present disclosure.

[0075] Specifically, the bipolar plate described in the third embodiment can directly use the electric bipolar plate provided in the second embodiment. The specific implementation structure can refer to the relevant content described in the second embodiment, which will not be repeated here.

[0076] Since the battery provided in Example 3 of the third aspect of the present disclosure adopts a bipolar plate that is heated more evenly, the life of the battery provided by the present disclosure is effectively improved.

[0077] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

[0078] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0079] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

Claims

1. A battery plate, characterized in that: include: A plate body (1), wherein a cooling inlet (11) and a cooling outlet (12) are respectively arranged on the plate surface of the plate body (1) near the two ends along the length direction, a flow field structure (17) is arranged in the middle of the cooling plate surface of the plate body (1), an inlet flow distribution area (A) is arranged on the side of the flow field structure (17) near the cooling inlet (11), and an outlet flow distribution area (B) is arranged on the side of the flow field structure (17) near the cooling outlet (12); A flow distribution structure (2), wherein the flow distribution structure (2) has a multi-stage distribution flow channel, and two of the flow distribution structures (2) are respectively arranged in the inlet flow distribution area (A) and the outlet flow distribution area (B), so that the cooling inlet (11) and the cooling outlet (12) are connected to the flow field structure (17) through the two flow distribution structures (2).

2. The battery plate according to claim 1, characterized in that: The flow distribution structure (2) comprises: A plurality of primary flow channels (21), a plurality of secondary flow channels (22) and a plurality of tertiary flow channels (23), the three of which are arranged in sequence along a first direction in the inlet flow distribution area (A), and the three of which are arranged in sequence along a second direction opposite to the first direction in the outlet flow distribution area (B), and the widths of the primary flow channels (21), the secondary flow channels (22) and the tertiary flow channels (23) decrease in sequence.

3. The battery plate according to claim 2, characterized in that: The cooling inlet (11) and the cooling outlet (12) are both located near the center of the width direction of the electrode body (1); the cooling inlet (11) and the cooling outlet (12) are respectively connected to the inlet flow distribution area (A) and the outlet flow distribution area (B) through two connecting channels (18); the connecting channels (18) extend along the length direction of the electrode body (1); The primary flow channel (21) comprises: a central flow channel (24) and a first sub-flow channel (26), wherein the central flow channel (24) and the first sub-flow channel (26) are both extended along the length direction of the electrode body (1) and close to the direction of the flow field structure (17); one end of the central flow channel (24) is located in the middle of the connecting channel (18); one end of a plurality of the first sub-flow channels (26) is flush with one end of the central flow channel (24); the plurality of the first sub-flow channels (26) are respectively arranged on both sides of the central flow channel (24) along the width direction of the electrode; and the length of the first sub-flow channel (26) gradually decreases from the central flow channel (24) to the edge of the electrode body (1) in the width direction; a second sub-flow channel (27), wherein a plurality of the second sub-flow channels (27) are arranged along the length direction of the electrode plate, the second sub-flow channels (27) are arranged along the width direction of the electrode plate body (1) and extend in a direction away from the central flow channel (24), the plurality of the second sub-flow channels (27) correspond to at least part of the first sub-flow channels (26) one by one, one end of each of the second sub-flow channels (27) is connected to the other end of the corresponding first sub-flow channel (26), the other ends of the second sub-flow channels (27) are arranged in a stepped manner, and the length increases successively from the flow field structure (17) to the two ends of the length direction of the electrode plate body (1); A third sub-flow channel (28), wherein a plurality of the third sub-flow channels (28) are arranged along the width direction of the electrode body (1), and the third sub-flow channel (28) extends along the length direction of the electrode and in a direction close to the flow distribution structure (2). The plurality of the third sub-flow channels (28) correspond one-to-one to the plurality of the second sub-flow channels (27), and one end of each of the third sub-flow channels (28) is connected to the other end of the corresponding second sub-flow channel (27), and the other end of the third sub-flow channel (28) is flush.

4. The battery plate according to claim 3, characterized in that: Also includes: A plurality of first blocking portions (29), wherein the plurality of first blocking portions (29) correspond one-to-one to the plurality of second sub-channels (27), and each first blocking portion (29) is arranged in the second sub-channel (27) and extends along the length direction of the second sub-channel (27) to separate the second sub-channel (27) into two secondary channels (22) of equal width.

5. The battery plate according to claim 3, characterized in that: Also includes: A plurality of second blocking portion (210) groups, wherein a plurality of second blocking portions (210) are arranged in the second blocking portion (210) group, wherein the extension direction of the second blocking portion (210) is the length direction of the third sub-flow channel (28), wherein the plurality of second blocking portion (210) groups correspond to the plurality of third sub-flow channels (28) one by one, wherein each second blocking portion (210) group is arranged in the corresponding third sub-flow channel (28), and wherein the plurality of second blocking portions (210) in each second blocking portion (210) group are evenly arranged along the width direction of the battery plate so as to separate the third sub-flow channel (28) into a plurality of tertiary flow channels (23).

6. The battery plate according to claim 3, characterized in that: Also includes: A plurality of basic flow channels (211), wherein the plurality of basic flow channels (211) are arranged in the connecting channel (18) and are located on a side of one end of the first sub-flow channel (26) away from the flow field structure (17), and the plurality of basic flow channels (211) are arranged along the width direction of the electrode body (1).

7. The battery plate according to claim 2, characterized in that: Also includes: A first protruding structure (3), wherein a plurality of the protruding structures are located between the flow distribution structure (2) and the flow field structure (17), and are arranged at intervals along the width direction of the battery plate.

8. The battery plate according to claim 5, characterized in that: Also includes: A plurality of second protruding structures (4), the plurality of second protruding structures (4) corresponding one to the plurality of second blocking portions (210), the plurality of second protruding structures (4) being arranged on a side of the corresponding second blocking portion (210) away from the flow field structure (17), and each second protruding structure (4) and its corresponding second blocking portion (210) being arranged at intervals along the length direction of the electrode plate body (1).

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

10. A battery, characterized in that: The battery comprises the bipolar plate of claim 9.

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