Heat distribution plate, battery and battery module

Abstract

Heat distribution plate (100), comprising: a plate (101) in which an internal cavity (13) is formed, wherein the plate (101) comprises a first plate body (103) and a second plate body (104) arranged opposite the first plate body (103), wherein the first plate body (103) comprises a first daughter plate body (105), a bending plate (107) and a second daughter plate body (106), wherein the bending plate (107) is connected between the first daughter plate body (105) and the second daughter plate body (106); and a first reinforcing structure (108) connected to the first plate body (103) and located in the inner cavity (13), wherein the first reinforcing structure (108) has a bending portion (110), wherein the bending portion (110) corresponds to the bending plate (107).

Description

Technical area

[0001] The present application relates to the field of battery technology, in particular to a heat distribution plate, a battery and a battery module. State of the art

[0002] A heat distribution plate is a phase-change heat transfer element that utilizes the latent heat of the phase change in the working fluid to dissipate heat, making it a promising thermal management method for solving product and equipment heat dissipation problems. Currently, the heat distribution plate is mainly used for heat dissipation of electronic devices. It features excellent thermal conductivity, a large heat transfer area, and good temperature distribution performance. In particular, the heat distribution plate has an ultra-thin thickness, and the outer dimensions can be customized according to actual heat dissipation needs. Disclosure of the application

[0003] In related technologies, the heat distribution plate can be bent and used as the outer shell of the battery. The thickness of the heat distribution plate is relatively thin, and during the bending process, the bent part is prone to deformation or even fracture due to weak compressive strength and internal expansion resistance.

[0004] The present application provides a heat distribution plate. The heat distribution plate comprises: a plate in which an internal cavity is formed, the plate comprising a first plate body and a second plate body arranged opposite the first plate body, the first plate body comprising a first daughter plate body, a flexure plate, and a second daughter plate body, the flexure plate being connected between the first daughter plate body and the second daughter plate body; and a first reinforcing structure connected to the first plate body and located in the inner cavity, the first reinforcing structure having a bending portion, the bending portion corresponding to the bending plate.

[0005] The present application further provides a battery. The battery includes the heat distribution plate.

[0006] The present application further provides a battery module. The battery module includes the heat distribution plate or the battery. Beneficial effects

[0007] The heat distribution plate of the present application includes a plate provided with an internal cavity. The first reinforcement structure is provided in the internal cavity. The first reinforcement structure can support the plate and enhance the structural strength of the plate, thereby improving the compressive strength and expansion resistance of the heat distribution plate, improving the structural strength of the heat distribution plate, preventing the occurrence of breakage of the heat distribution plate during bending, and improving the service life of the heat distribution plate. Meanwhile, the first reinforcement structure is provided in the internal cavity and does not occupy additional space. Brief description of the drawings Fig. 1 is a schematic structural view of a heat distribution plate according to some embodiments of the present application; Fig. 2 is a schematic structural view of a first plate body in Fig. 1; Fig. 3 is a schematic structural view of a second plate body in Fig. 1; Fig. 4 is a schematic structural view of a first reinforcement structure in Fig. 1 according to some embodiments; Fig. Figure 5 is an enlarged schematic view of A in Fig. 4; Fig. 6 is a main view of Fig. 5; Fig. Figure 7 is an enlarged schematic view of B in Fig. 6; Fig. 8 is a side view of Fig. 5; Fig. 9 is a schematic view of a partial structure of a first reinforcement structure in Fig. 1 according to some other embodiments; Fig. 10 is a schematic structural view of a second plate body in Fig. 1; Fig. 11 is a schematic structural view of a first reinforcement structure in Fig. 1; Fig. 12 is a partially enlarged view of a first reinforcing structure in Fig. 11 according to some embodiments; Fig. 13 is a partially enlarged view of a first reinforcing structure in Fig. 11 according to some other embodiments; Fig. 14 is a partially enlarged view of a first reinforcing structure in Fig. 11 according to some still other embodiments; Fig. 15 is a partially enlarged view of a first reinforcing structure in Fig. 11 according to further embodiments; Fig. 16 is a partially enlarged schematic view of C in Fig. 12; Fig. 17 is a schematic structural view of a first plate body in Fig. 1; Fig. Figure 18 is an enlarged schematic view of C0 in Fig. 17; Fig. 19 is a schematic structural view of a second plate body in Fig. 1; Fig. Figure 20 is an enlarged schematic view of D0 in Fig. 19; Fig. 21 is a sectional view of a heat distribution plate in Fig. 1; Fig. Figure 22 is an enlarged schematic view of E0 in Fig. 21; Fig. Figure 23 is an enlarged schematic view of F0 in Fig. 22; Fig. 24 is a schematic structural view of a heat distribution plate according to some other embodiments of the application; Fig. 25 is a schematic structural view of a heat distribution plate according to some still other embodiments of the application; Fig. 26 is a schematic structural view of a heat distribution plate according to further embodiments of the application. Reference symbol:

[0008] 100: heat distribution plate; 101: plate; 103: first plate body; 104: second plate body; 105: first daughter plate body; 106: second daughter plate body; 107: bending plate; 108: first reinforcement structure; 109: first section; 110: bending section; 111: second section; 112: reinforcement bottom plate; 113: reinforcement rib group; 114: first reinforcement rib; 115: first daughter reinforcement rib; 116: second daughter reinforcement rib; 117: support pillar; 118: mounting channel for liquid absorption core; 119: liquid absorption core; 120: wire mesh; 121: liquid inlet; 122: second reinforcement structure; 123: first reinforcement plate; 124: first fluid channel; 125: second fluid channel; 126: third daughter plate body; 127: bending daughter plate; 128: fourth daughter plate body; a1: separating plate; a2: daughter channel; c1: first reinforcement plate; c2: first groove; c3: second groove; d1: first fluid channel; d2: second fluid channel; 111b: first receiving slot;112b: first connecting wall; 121b: second receiving slot; 122b: second connecting wall; 13: inner cavity; 21: first groove; 211: first side edge; 212: second side edge; 22: projection; 23: receiving cavity.; EmbodimentsFirst embodiment

[0009] In related technologies, the heat distribution plate can be bent and used as the outer shell of the battery. The thickness of the heat distribution plate is relatively thin, and during the bending process, the bent part is prone to deformation or even fracture due to weak compressive strength and internal expansion resistance.

[0010] With this in mind, the present embodiment proposes a heat distribution plate that has strong structural strength, strong compressive strength, and does not affect the overall size of the battery module. The following is a detailed explanation of the heat distribution plate in conjunction with the main figures.

[0011] With reference to Fig. 1, Fig. 2 and Fig. 3, the heat distribution plate 100 comprises a plate 101 and a first reinforcement structure 108. The plate 101 is provided with an internal cavity. The plate 101 comprises a first plate body 103 and a second plate body 104 arranged opposite the first plate body 103. The first plate body 103 comprises a first daughter plate body 105, a bending plate 107, and a second daughter plate body 106. The bending plate 107 is connected between the first daughter plate body 105 and the second daughter plate body 106. The first reinforcement structure 108 is provided on the first plate body 103 and is located in the internal cavity. The first reinforcement structure 108 has a bending portion 110 corresponding to the bending plate 107.

[0012] The heat distribution plate 100 of the present application has a simple structure, low manufacturing cost, and efficient thermal diffusion capability. The heat distribution plate 100 includes a plate 101 provided with an internal cavity. The first reinforcement structure 108 is provided in the internal cavity. The first reinforcement structure 108 can support the plate 101 and enhance the structural strength of the plate 101, thereby improving the compressive strength and expansion resistance of the heat distribution plate 100, improving the structural strength of the heat distribution plate 100, preventing the occurrence of breakage of the heat distribution plate 100 during bending, and improving the service life of the heat distribution plate 100. Meanwhile, the first reinforcement structure 108 is provided in the internal cavity and does not occupy any additional space.

[0013] In some embodiments, a cross section of the bending portion 110 is arcuate, which can disperse the action force borne by the heat distribution plate 100 and improve the durability of the heat distribution plate 100.

[0014] It should be noted that the compressive strength of the heat distribution plate 100 is greater than or equal to 2.5 MPa. During use, the battery generates heat and expands. If the compressive strength of the heat distribution plate 100 is less than 2.5 MPa, the heat distribution plate 100 will be affected by the expansion force and experience bending deformation or even fracture.

[0015] See Fig. 4. The first reinforcement structure 108 further includes a first portion 109 and a second portion 111. The bending portion 110 is connected between the first portion 109 and the second portion 111. The first portion 109 corresponds to the first daughter plate body 105, and the second portion 111 corresponds to the second daughter plate body 106. This arrangement increases the contact area between the first reinforcement structure 108 and the first plate body 103 and increases the connection strength between the two.

[0016] In some embodiments, related to Fig. 3, the second plate body 104 comprises a third daughter plate body 126, a bending daughter plate 127, and a fourth daughter plate body 128. The bending daughter plate 127 is connected between the third daughter plate body 126 and the fourth daughter plate body 128, wherein the third daughter plate body 126 corresponds to the first daughter plate body 105, the fourth daughter plate body 128 corresponds to the second daughter plate body 106, and the bending daughter plate 127 corresponds to the bending plate 107.

[0017] To simplify processing, both the first plate body 103 and the second plate body 104 are initially flat plates, and the connection method between the first plate body 103 and the second plate body 104 is not limited. In some embodiments, the first plate body 103 and the second plate body 104 are welded first, and then the first plate body 103 and the second plate body 104 that are welded together are bent. In this way, the welding operations are facilitated and the difficulty of welding is reduced. In another embodiment, the first plate body 103 and the second plate body 104 are first bent so that the third daughter plate body 126 corresponds to the first daughter plate body 105, the fourth daughter plate body 128 corresponds to the second daughter plate body 106, and the bending daughter plate 127 corresponds to the bending plate 107.Then, the first plate body 103 and the second plate body 104 are welded together. In this way, the heat generation performance of the bending plate 107 and the bending daughter plate 127 can be improved, the loss of heat transfer performance of the bending plate 107 and the bending daughter plate 127 can be avoided, and the overall performance of the heat distribution plate 100 can be improved.

[0018] In some embodiments, please refer to Fig. 1. The first plate body 103 is a lower shell plate, and the second plate body 104 is an upper shell plate. The upper shell plate and the lower shell plate are each provided with a first receiving slot and a second receiving slot. The upper shell plate and the lower shell plate are welded together so that the first receiving slot and the second receiving slot can communicate and form an internal cavity. It should be noted that the specific position of the first reinforcing structure 108 is not limited as long as it can be located in the internal cavity. In the above embodiment, the first reinforcing structure 108 is provided on the first plate body 103. Of course, the first reinforcing structure 108 can also be provided on the second plate body 104, and a selection thereof can be made according to the actual situation.Since the first plate body 103 is the lower shell plate, providing the first reinforcing structure 108 on the first plate body 103 is more convenient for the welding connection between the first plate body 103 and the second plate body 104.

[0019] The welding method for the first plate body 103 and the second plate body 104 is not limited and may be brazing, laser penetration welding, resistance welding, etc. The selection may be based on the specific materials of the first plate body 103 and the second plate body 104. For example, in some embodiments, when the material of the first plate body 103 and the second plate body 104 is stainless steel, the first plate body 103 and the second plate body 104 are welded by laser penetration welding. In other embodiments, when the material of the first plate body 103 and the second plate body 104 is aluminum alloy or copper alloy, the first plate body 103 and the second plate body 104 are welded by brazing using solder paste or magnesium alloy welding wire as the filler metal.In other embodiments, when the material of the first plate body 103 and the second plate body 104 is aluminum alloy, the first plate body 103 and the second plate body 104 are welded by resistance welding with aluminum alloy welding wire as a filler metal.

[0020] In some embodiments, a working fluid is formed in the internal cavity for heat exchange. Note that the type of working fluid is not limited in the above embodiments and can be selected according to the actual application situation. For example, the working fluid can be lubricating oil, water, cold air, alcohol compounds, and so on.

[0021] In some embodiments, please refer to Fig. 8. In an extending direction of the first daughter plate body 105, the size of the first reinforcement structure 108 in the bending section 110 is L1 (ie, the length of the arc of the bending section 110), the size of the first reinforcement structure 108 in the first section 109 is L2 (ie, the length of the first daughter reinforcement rib 115 in the first section 109), and the size of the first reinforcement structure 108 in the second section 111 is L3 (ie, the length of the first daughter reinforcement rib 115 in the second section 111), where, L1: (L1 + L2 + L3) = (0, 1 ∼ 0.3): 1. It should be noted that when the ratio of L1 to (L1 + L2 + L3) is less than 0.1, the area of ​​the bending section 110 is too small, the difficulty of bending increases, the welding difficulty of the first plate body 103 and the second plate body 104 increases, processing is difficult and processing time increases.When the ratio of L1 to (L1 + L2 + L3) is greater than 0.3, the area of ​​the bending portion 110 increases and the wasted space increases.

[0022] With reference to Fig. 4 and Fig. 5. The first reinforcement structure 108 includes a reinforcement bottom plate 112 and a plurality of reinforcement rib groups 113. The reinforcement bottom plate 112 extends along the width direction of the first daughter plate body 105 and is provided within the first portion 109, the bending portion 110, and the second portion 111. A plurality of reinforcement rib groups 113 are arranged at intervals along the width direction of the first daughter plate body 105 on the reinforcement bottom plate 112 and are provided within the first portion 109, the bending portion 110, and the second portion 111. In this embodiment, the reinforcement bottom plate 112 and a plurality of reinforcement rib groups 113 are integrally formed. Setting the reinforcement bottom plate 112 can facilitate welding of the first reinforcement structure 108 onto the first plate body 103.During the welding process, the reinforcing base plate 112 can be welded onto the first plate body 103, thereby reducing the number of welding steps (if the reinforcing base plate 112 is not set, multiple reinforcing rib groups 113 must be welded onto the first plate body 103, increasing the welding difficulty and the number of welding steps). Another function of the reinforcing base plate 112 is to increase the structural strength of the first plate body 103, so that the first plate body 103 will not break during the bending process. The function of multiple reinforcing rib groups 113 is to increase the structural strength of the first plate body 103. At the same time, the purpose of setting multiple reinforcing rib groups 113 is to form a cavity between two adjacent reinforcing rib groups 113.During the bending process, the cavity can absorb part of the bending force, avoiding the concentration of the bending force that causes irregular deformation or even breakage of the heat distribution plate 100.

[0023] In some embodiments and with respect to Fig. 5, each reinforcing rib group 113 includes a plurality of first reinforcing ribs 114 extending along the length direction of the first daughter plate body 105 and spaced apart along the width direction of the first daughter plate body 105. A first gap configured for the flow of working fluid is formed between two adjacent reinforcing rib groups 113. This allows the first section 109 and the second section 111 to communicate.

[0024] In this embodiment, please refer to the Fig. 6 and Fig. 7. In the width direction of the first daughter plate body 105, the size of the reinforcing bottom plate 112 is L4, and the size of the first reinforcing rib 114 is L5, where, L5: L4 = (0.005 ∼ 0.05): 1. If the ratio of L5 to L4 is less than 0.005, the size of the first reinforcing rib 114 is too small, which easily leads to insufficient strength of the heat distribution plate 100. During use, the heat distribution plate 100 is prone to damage. If the ratio of L5 to L4 is greater than 0.05, the size of the first reinforcing rib 114 is too large, the occupied volume increases, the first gap decreases, the first portion 109 and the second portion 111 cannot communicate, and the heat dissipation ability or thermal conductivity of the heat distribution plate 100 decreases.

[0025] In some embodiments, the size of the first reinforcing rib 114 is 0.1 mm to 0.3 mm. L4 may be 0.1 mm, 0.12 mm, 0.13 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.24 mm, 0.25 mm, 0.28 mm, 0.29 mm, 0.3 mm, or other unspecified values.

[0026] In some embodiments, the width of the first gap is 0.8 mm to 3 mm. It should be noted that if the width of the first gap is less than 0.8 mm, the size of the first gap is too small, which can easily lead to blockages and the inability of the first portion 109 and the second portion 111 to communicate. If the size of the first gap is greater than 3 mm, this results in insufficient strength of the heat distribution plate 100, which is prone to deformation or even breakage. The size of the first gap can be 0.8 mm, 0.85 mm, 0.9 mm, 0.92 mm, 0.95 mm, 0.98 mm, 1 mm, 1.1 mm, 1.4 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.7 mm, 3 mm or other unspecified values.

[0027] The connection method between the first reinforcement structure 108 and the first plate body 103 is not limited. In some embodiments, the first reinforcement structure 108 and the first plate body 103 are bent separately and then joined together. In another embodiment, the first reinforcement structure 108 and the first plate body 103 are first joined together and then both are bent simultaneously.

[0028] In order to avoid stress concentration during the bending process, which causes abnormal deformation or even breakage of the first plate body 103 or the second plate body 104, with reference to Fig. 8, in this embodiment, each first reinforcement rib 114 includes two first daughter reinforcement ribs 115 and a plurality of second daughter reinforcement ribs 116. The two first daughter reinforcement ribs 115 are located within the first section 109 and the second section 111, respectively. A plurality of second daughter reinforcement ribs 116 are arranged between the two first daughter reinforcement ribs 115 and are located within the bending section 110. By placing a plurality of second daughter reinforcement ribs 116 in the bending section 110, each second daughter reinforcement rib 116 has a different orientation. During the bending process, each first reinforcement rib 115 diffuses stress in different directions, thereby avoiding stress concentration and preventing abnormal deformation or fracture of the heat distribution plate 100. At the same time, the heat distribution plate 100 is further provided with a wire mesh 120 and a liquid absorption core 119.A plurality of second daughter reinforcing ribs 116 diffuse the stress in different directions, thereby avoiding compressing the mesh 120 or the liquid absorption core 119, which causes wrinkles of the liquid absorption core 119 or the mesh 120 and blocks the inner cavity.

[0029] In some embodiments, the heat distribution plate further includes a second reinforcement structure 122 provided on the first daughter plate body 105 and the second daughter plate body 106. The second reinforcement structure 122 is used to improve the strength of the first daughter plate body 105 and the second daughter plate body 106. The second reinforcement structure 122 is located in the interior cavity and includes a plurality of sub-reinforcement ribs.

[0030] The density of multiple sub-reinforcement ribs on the plate 101 is V1, and the density of multiple second daughter reinforcement ribs 116 on the plate 101 is V2, where V1: V2 = (2 ∼ 6): 1. It should be noted that when the ratio of V1 to V2 is less than 2, the number of daughter reinforcement ribs is relatively small, and the compressive strength and internal expansion resistance of the first daughter plate body 105 and the second daughter plate body 106 are weak, resulting in easy deformation of the heat distribution plate; when the ratio of V1 to V2 is greater than 6, the density of multiple sub-reinforcement ribs is too dense, resulting in a reduction in the space of the internal cavity, which prevents the working fluid from flowing smoothly and is prone to clogging.

[0031] In some embodiments and with reference to Fig. 4, the number of second daughter reinforcement ribs 116 of each first reinforcement rib 114 is n1, and the number of first reinforcement ribs 114 of each reinforcement rib group 113 is n2, where, n1 = n2. It should be noted that during the bending process, the bending portion 110 is generally bent. During the bending process, the bending portion 110 receives a bending force, and the area near the bending portion 110 also receives the bending force (that is, the area of ​​the first portion 109 corresponding to the first daughter plate body 105 is affected by the bending force, and the area of ​​the second portion 111 corresponding to the second daughter plate body 106 is also affected by the bending force).In this embodiment, the second subsidiary reinforcement rib 116 is used to reinforce the structural strength of the flexure plate 107, and the first subsidiary reinforcement rib 115 is used to increase the structural strength of the first subsidiary plate body 105 and the second subsidiary plate body 106. Since the first reinforcement rib 114 includes two second subsidiary reinforcement ribs 116, the two second subsidiary reinforcement ribs 116 correspond to the first section 109 and the second section 111, respectively. Therefore, in each reinforcement rib group 113, the number of second subsidiary reinforcement ribs in the first section is also n2, and the number of second subsidiary reinforcement ribs in the second section is also n2, where n1 = n2.The purpose of this arrangement is to ensure that the structural strength of the first section 109, the bending section 110 and the second section 111 is equal so that they are evenly stressed and local deformations are avoided.

[0032] In some embodiments, in the length direction of the first daughter plate body 105, the size of the first reinforcement structure 108 in the bending section 110 is L1, the size of the first reinforcement structure 108 in the first section 109 is L2, the size of the first reinforcement structure 108 in the second section 111 is L3, and the size of the second daughter reinforcement rib 116 is L6, where, L6: (L1 + L2 + L3) = (0.03 ∼ 0.2): 1. It should be noted that when the ratio of L6 to (L1 + L2 + L3) is less than 0.03, the size of the second daughter reinforcement rib 116 is smaller. During the bending process, the second daughter reinforcing rib 116 itself is slightly compressed and deformed, thereby compressing other parts (such as wire mesh 120 or liquid absorption core 119) to bend and deform other parts.If the ratio of L6 to (L1 + L2 + L3) is greater than 0.2, the size of the second daughter reinforcing rib 116 is too large, and it requires a larger bending force to bend the first reinforcing structure 108 during the bending process, which may affect other parts and cause deformation or even breakage of these parts.

[0033] In some embodiments, the size of L6 is 0.05 mm to 0.1 mm. L6 may be 0.05 mm, 0.055 mm, 0.06 mm, 0.065 mm, 0.07 mm, 0.075 mm, 0.08 mm, 0.085 mm, 0.09 mm, 0.095 mm, 0.1 mm, or other unspecified values.

[0034] In some embodiments, the heat distribution plate 100 further includes a second reinforcement structure 122 including a plurality of support pillars 117. The first support pillars 117 are located in the interior cavity, and one end of the support pillars 117 is connected to the first plate body 103, while the other end of the support pillars 117 is connected to the second plate body 104. The support pillars 117 are used to support the first plate body 103 and the second plate body 104. Note that the arrangement of the plurality of support pillars 117 is not limited. In one embodiment, the plurality of first support pillars 117 are regularly arranged. In other embodiments, the plurality of first support pillars 117 are irregularly arranged.

[0035] In this embodiment, the reinforcing bottom plate 112 and the reinforcing rib group 113 are connected between the first plate body 103 and the second plate body 104 to prevent bending deformation of the heat distribution plate 100. The reinforcing bottom plate 112 is connected to the bending plate 107, and the reinforcing rib group 113 is connected to the bending daughter plate 127. The reinforcing bottom plate 112 and the reinforcing rib group 113 support the bending plate 107 and the bending daughter plate 127, thereby improving the structural strength of the bending portion 110.

[0036] In some embodiments and with respect to Fig. 1, the heat distribution plate 100 further includes a plurality of fluid receiving cores 119 extending along the length direction of the plate 101 and spaced apart along the width direction of the plate 101 in the internal cavity. A fluid receiving core mounting channel 118 is formed between two adjacent reinforcing rib groups 113. The fluid receiving core mounting channel 118 extends along the length direction of the plate 101 and is configured for mounting the fluid receiving core 119. The fluid receiving core 119 can receive the working fluid and diffuse it into the internal cavity, allowing the internal cavity to be filled with the working fluid and increasing the heat dissipation capacity.

[0037] In some embodiments, the width of the mounting channel for the fluid receiving core 118 is 14 mm to 20 mm. More specifically, the width of the mounting channel for the fluid receiving core 118 may be 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, or other unspecified values.

[0038] In some embodiments, please continue to refer to Fig. 1, the heat distribution plate 100 further includes a mesh wire 120 provided in the inner cavity and located above a plurality of liquid absorption cores 119.

[0039] In some embodiments, please refer to Fig. 2. The bending angle of the bending plate 107 is α, where 90° ≤ α ≤ 95°. If α is less than 90°, the space occupied by the bending plate 107 increases. If α is greater than 95°, the space between the two walls of the bending plate 107 cannot be utilized, and the space utilization rate is low. α can be 90°, 91°, 92°, 93°, 94°, 95°, or other unspecified values. As a preferred embodiment, α is 90°.

[0040] In some embodiments, please refer to Fig. 4. The bending angle of the bending section is β, where 90° ≤ β ≤ 95°. If β is less than 90°, the space occupied by the bending section 110 increases. If β is greater than 95°, the angle between the first section 109 and the second section 111 is too large, and the space between the bending sections 110 cannot be utilized, resulting in a low space utilization rate. β can be 90°, 91°, 92°, 93°, 94°, 95°, or other unspecified values. As a preferred embodiment, β is 90°.

[0041] In some embodiments, please refer to Fig. 3. The bending angle of the bending daughter plate is θ, where 90° ≤ θ ≤ 95°. If θ is less than 90°, the space occupied by the bending daughter plate 127 increases. If θ is greater than 95°, the space between the two walls of the bending daughter plate 127 cannot be utilized, and the space utilization rate is low. θ can be 90°, 91°, 92°, 93°, 94°, 95°, or other unspecified values. As a preferred embodiment, θ is 90°.

[0042] In this embodiment, α = β = θ, the first reinforcing structure 108 is thereby more tightly abutted against the first plate body 103 and the second plate body 104, thereby avoiding a gap between the three and improving the structural strength of the heat distribution plate 100.

[0043] In some embodiments and with respect to Fig. 1, a liquid inlet 121 is further formed on the heat distribution plate 100. The liquid inlet 121 communicates with the internal cavity and is configured to introduce working fluid into the internal cavity.

[0044] In one embodiment, the plate 101 comprises a stainless steel plate. The first reinforcement structure 108 comprises a first stainless steel reinforcement structure. The material of the plate 101 comprises stainless steel, that is, the materials of the first plate body 103 and the second plate body 104 are both stainless steel. At the same time, the material of the first reinforcement structure 108 is also stainless steel. Stainless steel material has poor reactivity and generally does not react with other substances, with good corrosion resistance. At the same time, the structural strength of the stainless steel material is strong and does not deform easily, which can increase the service life of the heat distribution plate 100. In this embodiment, the stainless steel material is preferably 304 stainless steel.

[0045] In other embodiments, the plate 101 comprises a copper alloy plate, and the first reinforcement structure 108 comprises a first copper alloy reinforcement structure. In other embodiments, the plate 101 comprises an aluminum alloy plate, and the first reinforcement structure 108 comprises a first aluminum alloy reinforcement structure. The materials of the plate 101 and the first reinforcement structure 108 can be selected depending on the actual situation.

[0046] Of course, in other embodiments, in order to improve the corrosion resistance of the plate 101, a protective layer is often placed on the outer surface of the plate 101, which is wrapped around the outer surface of the plate 101 to insulate the plate 101 from the outside, thereby preventing corrosion of the plate 101 and improving the service life of the plate 101. The protective layer includes each of a nickel layer, a chromium layer, and a zinc layer. The nickel layer, chromium layer, and zinc layer have poor activity and basically do not react with other substances. The protective layer is wrapped around the outer surface of the plate and can protect the plate 101. A dense passivation film layer is formed on the outer surface of the plate 101, effectively preventing the plate 101 from reacting with other substances and extending the service life of the heat distribution plate 100.

[0047] Likewise, in some embodiments, a protective layer may also be formed on the outer side of the first reinforcing structure 108, and the specific setting method may relate to the setting method of the plate and is not repeated here.

[0048] The present application further proposes a battery including a heat distribution plate 100. The specific structure of the heat distribution plate 100 is related to the above embodiments. Since this battery adopts all the technical solutions of the above embodiments, it has at least all the advantageous effects brought about by the technical solutions of the above embodiments, which are not repeated here.

[0049] In one embodiment, the battery further includes a battery case composed of the heat distribution plate 100. That is, six sides of the battery case may be composed of the heat distribution plate 100. This arrangement can save space and increase space utilization. Note that the six heat distribution plates 100 may be in communication or not in communication, which can be selected according to the actual situation.

[0050] In some embodiments, the battery case has six housing surfaces, and the heat distribution plate 100 can be applied to each housing surface of the battery case or can be applied to multiple housing surfaces at the same time. For example, the heat distribution plate 100 can be applied to two adjacent housing surfaces of the battery case. The first portion 109 of the heat distribution plate 100 corresponds to one housing surface, and the second portion 111 of the heat distribution plate 100 corresponds to the other housing surface, so that the heat distribution plate 100 can serve as two housing surfaces of the battery case. Specifically, the selection can be made according to the size of the battery module.

[0051] In other embodiments, the heat distribution plate 100 may further be applied within the battery, which includes the battery casing and a cell pack group. The cell pack group is mounted in the battery casing and includes at least one cell pack. The first portion 109 of the heat distribution plate 100 corresponds to one side of the cell pack, and the second portion 111 of the heat distribution plate 100 corresponds to the other side of the cell pack. To further equalize the temperature of adjacent cell packs, a heat distribution plate 100 may be disposed between two adjacent cell packs to achieve temperature equalization of the multiple sides, thereby transferring the temperature from the high-temperature part to the low-temperature part directly cooled by the cooling plate, increasing the cooling efficiency and preventing thermal runaway.

[0052] In other embodiments, the heat distribution plate 100 can be further applied to the battery module. The battery module includes multiple batteries. The first portion 109 of the heat distribution plate 100 corresponds to one side of the battery case, and the second portion 111 of the heat distribution plate 100 corresponds to the other side of the battery case. To further equalize the temperature of adjacent batteries, a heat distribution plate 100 can be arranged between two adjacent batteries to achieve temperature equalization of the multiple sides, thereby transferring the temperature from the high-temperature part to the low-temperature part, which is directly cooled by the cooling plate. Second embodiment

[0053] In related technologies, the heat distribution plate can be bent and used as the outer shell of the battery. The thickness of the heat distribution plate is relatively thin, and during the bending process, the bent part is prone to deformation or even fracture due to weak compressive strength and internal expansion resistance.

[0054] Against this background, the present embodiment proposes a heat distribution plate 100. Referring to Fig. 1, Fig. 2 and Fig. 3, the heat distribution plate 100 comprises a plate 101 and a first reinforcement structure 108. The plate 101 is provided with an internal cavity. The plate 101 comprises a first plate body 103 and a second plate body 104 arranged opposite the first plate body 103. The first plate body 103 comprises a first daughter plate body 105, a bending plate 107, and a second daughter plate body 106. The bending plate 107 is connected between the first daughter plate body 105 and the second daughter plate body 106. The first reinforcement structure 108 is provided on the first plate body 103 and is located in the internal cavity. The first reinforcement structure 108 has a bending portion 110 corresponding to the bending plate 107.

[0055] The heat distribution plate 100 of the present application has a simple structure, low manufacturing cost, and efficient thermal diffusion capability. The heat distribution plate 100 includes a plate 101 provided with an internal cavity. The first reinforcement structure 108 is provided in the internal cavity. The first reinforcement structure 108 can support the plate 101 and enhance the structural strength of the plate 101, thereby improving the compressive strength and expansion resistance of the heat distribution plate 100, improving the structural strength of the heat distribution plate 100, preventing the occurrence of breakage of the heat distribution plate 100 during bending, and improving the service life of the heat distribution plate 100. Meanwhile, the first reinforcement structure 108 is provided in the internal cavity and does not occupy any additional space.

[0056] In some embodiments, the first reinforcement structure 108 includes a first reinforcement plate 123, and the first reinforcement plate 123 includes a concave portion. In another embodiment, the first reinforcement plate 123 includes a convex portion. In yet another embodiment, the first reinforcement plate 123 includes a concave portion and a convex portion.

[0057] In this embodiment, please refer to Fig. 9. The first reinforcement structure 108 includes a convex portion and a concave portion. The first reinforcement structure 108 includes a first reinforcement plate 123 formed with concave and convex shapes. The first reinforcement plate 123 in Fig. 8 is taken as an example, and the portion facing the first plate body 103 is the convex portion, and the portion facing the second plate body 104 is the concave portion. The concave portion and the first plate body 103 define a first fluid channel 124. The convex portion and the second plate body 104 define a second fluid channel 125. The first fluid channel 124 and the second fluid channel 125 are arranged at intervals. In this embodiment, by setting the first reinforcing plate with concave and convex shapes, the space is appropriately utilized, the space occupied by the first reinforcing structure 108 is reduced, and the cooling efficiency is increased. In the traditional reinforcing structures, a plurality of reinforcing ribs are often provided in the internal cavity, and the plurality of reinforcing ribs are arranged at intervals, resulting in an increase in the space occupied by the reinforcing ribs.The position where the reinforcing ribs are located prevents the working fluid from passing through. In this embodiment, by setting the first reinforcing structure 108 with concave and convex shapes, flow channels are formed between the first reinforcing plate 123 and the first plate body 103 and the second plate body 104, thereby improving the structural strength of the heat dissipation plate and preventing the space in the internal cavity from being wasted. Cooling efficiency is improved by utilizing the first fluid channel 124 and the second fluid channel 125 for the passage of the working fluid.

[0058] In some embodiments, the first reinforcement structure 108 is arranged separately from the plate 101, and the first reinforcement structure 108 is integrally formed by stamping. Specifically, in practical operation, the first reinforcement structure 108 is first formed by stamping, then the convex portion of the first reinforcement structure 108 is welded to the first plate body 103, and the concave portion of the first reinforcement structure 108 is welded to the second plate body 104, thereby securing the first reinforcement structure 108 to the plate 101.

[0059] In one embodiment, the first reinforcement structure 108 may also be integrally formed by aluminum extrusion. The specific steps of integral aluminum extrusion molding may refer to conventional settings in this field and will not be repeated here.

[0060] The first reinforcing structure 108 further includes a plurality of reinforcing rib groups 113, and the setting method of the plurality of reinforcing rib groups 113 may refer to the first embodiment and will not be repeated here.

[0061] The heat distribution plate 100 further includes a second reinforcing structure 122, and the adjustment method of the second reinforcing structure 122 may refer to the first embodiment and will not be repeated here. Third embodiment

[0062] In related technologies, the heat distribution plate can be bent and used as the outer shell of the battery. The thickness of the heat distribution plate is relatively thin, and during the bending process, the bent part is prone to deformation or even fracture due to weak compressive strength and internal expansion resistance.

[0063] Against this background, this embodiment proposes a method for manufacturing a heat distribution plate 100, which comprises the following steps:

[0064] S1: Bending the first plate body 103 and the second plate body 104;

[0065] The material is selected. The first plate body 103, the second plate body 104, the mesh 120, the liquid receiving core 119, and the injection pipe are all made of stainless steel. Then, the first plate body 103 and the second plate body 104 are placed on a punching machine, and a first groove is formed on the first plate body 103 and a second groove is formed on the second plate body 104 by punching. The first plate body 103 and the second plate body 104 are bent by a bending machine, and the bending size is determined according to the specific process requirements. Then, the bent first plate body 103, the bent second plate body 104, the mesh 120, the liquid receiving core 119, and the injection pipe are ultrasonically cleaned.

[0066] S2: Overlaying the first plate body 103, the liquid absorption core 119, the wire mesh 120 and the second plate body 104 from bottom to top;

[0067] By coating the first plate body 103 and the second plate body 104 using vacuum ion plating, a protective layer can be coated on the outer surface of the first plate body 103 and the second plate body 104. Then, the first reinforcement structure 108 is welded to the first plate body 103. The first plate body 103 is placed on an operating table, and the fluid absorption core 119 is installed on the first plate body 103. Then, the mesh 120 is placed on the fluid absorption core 119, and the second plate body 104 is placed on the first plate body 103.

[0068] S3: After the step of bending the first plate body 103 and the second plate body 104, the first plate body 103 and the second plate body 104 are welded to obtain the heat distribution plate.

[0069] Edge sealing by laser welding and welding together the first plate body 103 and the second plate body 104. (Note that in this step, the bent first plate body 103 and the bent second plate body 104 are welded.)

[0070] Then, the injection pipe is welded to the liquid inlet 121, pure water is injected into the inner cavity through the injection pipe, then the inner cavity is evacuated (with a vacuum of 0.08 torr), followed by welding sealing by laser welding to obtain a heat distribution plate 100.

[0071] An aging test on the heat distribution plate 100 (test conditions: 85±5°C, 12 ∼ 24h) is conducted to check whether its performance deteriorates.

[0072] A gas sealing test on the heat distribution plate 100 (test conditions: helium pressure of 0.16 ∼ 0.6 Mpa, 4h) is conducted to check whether its performance deteriorates.

[0073] It should be noted that the test methods and performance verifications for the aging test and gas seal test may refer to the conventional settings in this area and are not repeated here. Fourth embodiment

[0074] In related technologies, to increase the strength of the heat distribution plate, reinforcement ribs are often arranged inside the heat distribution plate for support. These reinforcement ribs have a high fin density, a small gap, and occupy more space, resulting in a reduction in the internal space of the heat distribution plate, a reduction in the absorbed working fluid, and a reduction in the performance of the heat distribution plate.

[0075] In view of this, the present embodiment proposes a heat distribution plate 100. The heat distribution plate 100 according to the present application has strong structural strength, strong compressive strength, and excellent performance. The following provides a detailed explanation of the heat distribution plate 100 in conjunction with the main figures.

[0076] See Fig. 1, the heat distribution plate 100 comprises a plate 101 and a first reinforcement structure 108. The plate 101 is provided with an internal cavity. The plate 101 comprises a first plate body 103 and a second plate body 104 arranged opposite the first plate body 103. The first reinforcement structure 108 is connected to the first plate body 103 and is located within the internal cavity. A fluid channel is formed between the first reinforcement structure 108 and the first plate body 103 and / or the second plate body 104, through which the working fluid flows within the internal cavity.

[0077] The heat distribution plate 100 according to the present application comprises a plate 101 provided with an internal cavity. The first reinforcement structure 108 is provided in the internal cavity. The first reinforcement structure 108 can support the plate 101 and reinforce the structural strength of the plate 101. At the same time, a fluid channel is formed between the first reinforcement structure 108 and the first plate body 103 and / or the second plate body 104, through which the working fluid flows in the internal cavity. In this way, the first reinforcement structure 108 can reinforce the structural strength of the plate 101 without reducing the working fluid contained in the internal cavity, thereby ensuring that the performance of the heat distribution plate 100 remains unchanged.

[0078] It should be noted that the compressive strength of the heat distribution plate 100 is greater than or equal to 0.5 MPa. During use, the battery generates heat and expands. If the compressive strength of the heat distribution plate 100 is less than 0.5 MPa, the heat distribution plate 100 will be affected by the expansion force and experience bending deformation or even fracture.

[0079] The specific shape of the heat distribution plate 100 is not limited and may be a "L"-shaped structure, an "L"-shaped structure, or a "T"-shaped structure (by combining two "L"-shaped heat distribution plates 100). The specific shape can be selected according to the actual situation. In this embodiment, for ease of explanation, the "L"-shaped heat distribution plate 100 is taken as an example to describe the first reinforcement structure 108 in detail.

[0080] In this embodiment, please refer to Fig. 2, Fig. 10 and Fig. 11. The first plate body 103 comprises a first daughter plate body 105, a flexure plate 107, and a second daughter plate body 106. The flexure plate 107 is connected between the first daughter plate body 105 and the second daughter plate body 106. The second plate body 104 comprises a third daughter plate body 126, a flexure daughter plate 127, and a fourth daughter plate body 128. The flexure daughter plate 127 is connected between the third daughter plate body 126 and the fourth daughter plate body 128, wherein the third daughter plate body 126 corresponds to the first daughter plate body 105, the fourth daughter plate body 128 corresponds to the second daughter plate body 106, and the flexure daughter plate 127 corresponds to the flexure plate 107. The first reinforcement structure 108 comprises a first portion 109, a flexure portion 110, and a second portion 111.The bending portion 110 is connected between the first portion 109 and the second portion 111. The first portion 109 corresponds to the first daughter plate body 105 and the third daughter plate body 126, and the second portion 111 corresponds to the second daughter plate body 106 and the fourth daughter plate body 128. This arrangement increases the contact area between the first reinforcement structure 108 and the first plate body 103 and increases the connection strength between the two.

[0081] To simplify processing, both the first plate body 103 and the second plate body 104 are initially flat plates, and the connection method between the first plate body 103 and the second plate body 104 is not limited. In some embodiments, the first plate body 103 and the second plate body 104 are welded first, and then the first plate body 103 and the second plate body 104 that are welded together are bent. This arrangement facilitates the welding process and reduces the difficulty of welding. In another embodiment, the first plate body 103 and the second plate body 104 are first bent so that the third daughter plate body 126 corresponds to the first daughter plate body 105, the fourth daughter plate body 128 corresponds to the second daughter plate body 106, and the bending daughter plate 127 corresponds to the bending plate 107.Then, the first plate body 103 and the second plate body 104 are welded together. This arrangement can improve the heat generation performance of the bending plate 107 and the bending daughter plate 127, prevent the loss of heat transfer performance of the bending plate 107 and the bending daughter plate 127, and improve the overall performance of the heat distribution plate 100.

[0082] In some embodiments, a cross section of the bending portion 110 is arcuate, which can disperse the action force borne by the heat distribution plate 100 and improve the durability of the heat distribution plate 100.

[0083] In some embodiments, please refer to Fig. 1. The first plate body 103 is a lower shell plate, and the second plate body 104 is an upper shell plate. The upper shell plate and the lower shell plate are each provided with a first receiving slot and a second receiving slot. The upper shell plate and the lower shell plate are welded so that the first receiving slot and the second receiving slot communicate and form the internal cavity. It should be noted that the specific position of the first reinforcing structure 108 is not limited, as long as it can be located at the internal cavity. In the above embodiment, the first reinforcing structure 108 is provided on the first plate body 103. Of course, the first reinforcing structure 108 may also be provided on the second plate body 104 and can be selected according to the actual situation.Since the first plate body 103 is the lower shell plate, providing the first reinforcing structure 108 on the first plate body 103 is more convenient for the welding connection of the first plate body 103 and the second plate body 104.

[0084] In some embodiments, the working fluid for heat exchange is formed in the internal cavity. Note that the type of working fluid is not limited in the above embodiments and can be selected according to the actual application situation. For example, the working fluid can be lubricating oil, water, cold air, alcohol compounds, and so on.

[0085] Please refer to Fig. 12 and Fig. 16, the first reinforcement structure 108 in this embodiment includes a first reinforcement plate c1, a second reinforcement plate c0, and a plurality of partition plates a1. The first reinforcement plate c1 and the second reinforcement plate c0 are arranged opposite each other, and the first reinforcement plate c1 and the second reinforcement plate c0 are connected to each other to enclose an overall channel extending along the length direction of the first plate body 103. The overall channel is used for the flow of working fluid. To increase the structural strength of the overall channel, the plurality of partition plates a1 are connected between the first reinforcement plate c1 and the second reinforcement plate c0 to divide the overall channel into a plurality of subsidiary channels a2 along the width direction of the first plate body 103. The subsidiary channels a2 are used for the flow of working fluid. The fluid channel includes a plurality of subsidiary channels a2.In this way, the daughter channels a2 are used for the passage of the working fluid. The partition plates a1 are used for support, thereby increasing the structural strength of the heat distribution plate 100.

[0086] In some embodiments, the first reinforcement plate c1 is provided with a plurality of reinforcement rib groups 113 at the part corresponding to the bending portion 110. The reinforcement rib groups 113 are arranged at intervals along the width direction of the first plate body 103. The function of the reinforcement rib groups 113 is to further increase the structural strength of the first plate body 103. At the same time, the purpose of setting a plurality of reinforcement rib groups 113 is to form a cavity between two adjacent reinforcement rib groups 113. During the bending process, the cavity can absorb part of the bending force, preventing the concentration of the bending force that causes the heat distribution plate 100 to experience abnormal deformation or even breakage.

[0087] In some embodiments, each reinforcing rib group 113 includes a plurality of first reinforcing ribs 114 spaced apart along the length direction of the first daughter plate body 105. The orientations of respective first reinforcing ribs 114 are different. During the bending process, each first reinforcing rib 114 diffuses stress in different directions, thereby preventing stress concentration and abnormal deformation or fracture of the heat distribution plate 100. A first gap is formed between both adjacent reinforcing rib groups 113, which is configured for the flow of working fluid to reduce the space occupied by the first reinforcing structure 108. Based on more space for the working fluid, the performance of the heat distribution plate 100 is increased.

[0088] In some embodiments, the width of the first gap is 0.8 mm to 3 mm. It should be noted that if the width of the first gap is less than 0.8 mm, the size of the first gap is too small, which can easily lead to clogging and the inability to connect the first portion 109 and the second portion 111. If the size of the first gap is greater than 3 mm, this results in insufficient strength of the heat distribution plate 100, which is prone to deformation or even breakage. In particular, the size of the first gap may be 0.8 mm, 0.85 mm, 0.9 mm, 0.92 mm, 0.95 mm, 0.98 mm, 1 mm, 1.1 mm, 1.4 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.7 mm, 3 mm or other unspecified values.

[0089] The connection method between the first reinforcement structure 108 and the first plate body 103 is not limited. In some embodiments, the first reinforcement structure 108 and the first plate body 103 are bent separately and then connected to each other. In another embodiment, the first reinforcement structure 108 and the first plate body 103 are first connected together and then both are bent simultaneously.

[0090] In some embodiments and with respect to Fig. 1, the heat distribution plate 100 further includes a plurality of fluid receiving cores 119 extending along the length direction of the plate 101 and arranged at intervals in the internal cavity along the width direction of the plate 101. A fluid receiving core mounting channel 118 is formed between both adjacent reinforcing rib groups 113. The fluid receiving core mounting channel 118 extends along the length direction of the plate 101 and is configured for mounting the fluid receiving core 119. The fluid receiving core 119 can receive the working fluid and diffuse it into the internal cavity, so that the internal cavity can be filled with the working fluid and the heat dissipation capacity is increased.

[0091] In some embodiments, the width of the mounting channel for the fluid receiving core 118 is 14 mm to 20 mm. The width of the mounting channel for the fluid receiving core 118 may be 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, or other unspecified values.

[0092] In some embodiments, please continue to refer to Fig. 1, the heat distribution plate 100 further includes a mesh wire 120 provided in the inner cavity and located above a plurality of liquid absorption cores 119.

[0093] In some embodiments and with respect to Fig. 1, a liquid inlet 121 is further formed on the heat distribution plate 100. The liquid inlet 121 communicates with the internal cavity and is configured to introduce working fluid into the internal cavity.

[0094] In one embodiment, the plate 101 comprises a stainless steel plate. The first reinforcement structure 108 comprises a first stainless steel reinforcement structure. Specifically, the material of the plate 101 comprises stainless steel, that is, the materials of the first plate body 103 and the second plate body 104 are both stainless steel. At the same time, the material of the first reinforcement structure 108 is also stainless steel. Stainless steel material has poor reactivity and generally does not react with other substances, with good corrosion resistance. At the same time, the structural strength of the stainless steel material is strong and does not deform easily, which can increase the service life of the heat distribution plate 100. In this embodiment, the stainless steel material is preferably 304 stainless steel.

[0095] Of course, in other embodiments, in order to increase the corrosion resistance of the plate 101, a protective layer is often placed on the outer surface of the plate 101, and the protective layer is wrapped around the outer surface of the plate 101 to insulate the plate 101 from the outside, thereby preventing corrosion of the plate 101 and extending the service life of the plate 101. Specifically, the protective layer includes any one of a nickel layer, a chromium layer, and a zinc layer. The nickel layer, chromium layer, and zinc layer have poor activity and basically do not react with other substances. The protective layer is wrapped around the outer surface of the plate 101 and can protect the plate 101. A dense passivation film layer is formed on the outer surface of the plate 101, which effectively prevents the plate 101 from reacting with other substances, thereby extending the service life of the heat distribution plate 100.

[0096] Likewise, in some embodiments, a protective layer may also be provided on the outer side of the first reinforcement structure 108. The specific adjustment may relate to the adjustment of the plate 101 and will not be repeated here.

[0097] The application further proposes a battery including the heat distribution plate 100. The specific structure of the heat distribution plate 100 is related to the above embodiments. Since this battery adopts all the technical solutions of the above embodiments, it has at least all the advantageous effects brought about by the technical solutions of the above embodiments, which are not repeated here.

[0098] In one embodiment, the battery further includes a battery case composed of the heat distribution plate 100. That is, six sides of the battery case may be composed of the heat distribution plate 100. This arrangement can save space and increase space utilization. Note that the six heat distribution plates 100 may be in communication or not in communication, which can be selected according to the actual situation.

[0099] In some embodiments, the battery case has six housing surfaces, and the heat distribution plate 100 can be applied to each housing surface of the battery case or can be applied to multiple housing surfaces at the same time. For example, the heat distribution plate 100 can be applied to two adjacent housing surfaces of the battery case. The first portion 109 of the heat distribution plate 100 corresponds to one housing surface, and the second portion 111 of the heat distribution plate 100 corresponds to the other housing surface, so that the heat distribution plate 100 can serve as two housing surfaces of the battery case. Specifically, the selection can be made according to the size of the battery module.

[0100] In other embodiments, the heat distribution plate 100 may further be applied within the battery, which includes the battery casing and a cell pack assembly. The cell pack assembly is mounted within the battery casing and includes at least one cell pack. The first portion 109 of the heat distribution plate 100 corresponds to one side of the cell pack, and the second portion 111 of the heat distribution plate 100 corresponds to the other side of the cell pack. To equalize the temperature of adjacent cell packs, a heat distribution plate 100 may further be disposed between two adjacent cell packs to achieve temperature equalization of the multiple sides, thereby transferring the temperature from the high-temperature part to the low-temperature part directly cooled by the cooling plate, increasing the cooling efficiency and preventing thermal runaway.

[0101] In other embodiments, the heat distribution plate 100 can be further applied to the battery module. The battery module includes multiple batteries. The first portion 109 of the heat distribution plate 100 corresponds to one side of the battery case, and the second portion 111 of the heat distribution plate 100 corresponds to the other side of the battery case. To equalize the temperature of adjacent batteries, a heat distribution plate 100 can be further arranged between two adjacent batteries to achieve temperature equalization of the multiple sides, thereby transferring the temperature from the high-temperature part to the low-temperature part, which is directly cooled by the cooling plate. Fifth embodiment

[0102] In related technologies, to increase the strength of the heat distribution plate, reinforcement ribs are often arranged inside the heat distribution plate for support. These reinforcement ribs have a high fin density, a small gap, and occupy more space, resulting in a reduction in the internal space of the heat distribution plate, a reduction in the absorbed working fluid, and a reduction in the performance of the heat distribution plate.

[0103] In view of this, the present embodiment proposes a heat distribution plate 100. The heat distribution plate 100 according to the present application has strong structural strength, strong compressive strength, and excellent performance. The following provides a detailed explanation of the heat distribution plate 100 in conjunction with the main figures.

[0104] It should be noted that the difference between the fifth embodiment and the fourth embodiment is the first reinforcement structure 108, and all other structures are the same.

[0105] In this embodiment, please refer to Fig. 13. The first reinforcement structure 108 includes a first reinforcement plate c1. A plurality of first grooves c2 are formed on a side of the first reinforcement plate c1 facing the first plate body 103. In actual operation, the first reinforcement plate c1 is first placed on a punching machine, and a plurality of first grooves c2 are punched out on the first reinforcement plate c1. The side of the first reinforcement plate c1 having a plurality of first grooves c2 is connected to the first plate body 103, and the groove walls of the first grooves c2 and the first plate body 103 enclose a first channel. In this way, the groove walls of the first grooves c2 are used to support the heat distribution plate 100. The first channel is used for the passage of working fluid.In this way, the structural strength of the heat distribution plate 100 can be ensured, and the first channel is reserved for the passage of working fluid, and not too much space is occupied in the inner cavity, and no reduction in the performance of the heat distribution plate 100 is caused.

[0106] In some embodiments, the first reinforcement structure 108 is integrally formed by stamping. In practical operation, the first reinforcement structure 108 is first stamped, and then the side of the first reinforcement structure 108 having the first grooves c2 is welded to the first plate body 103, and the other side thereof abuts the second plate body 104 (similarly, the other side thereof may also be welded to the second plate body 104), thereby securing the first reinforcement structure 108 to the plate 101.

[0107] In one embodiment, the first reinforcement structure 108 may also be integrally formed by aluminum extrusion. The specific steps of integral aluminum extrusion molding may refer to conventional settings in this field and will not be repeated here.

[0108] The other structures of the fifth embodiment may refer to the settings in the fourth embodiment and will not be repeated here. Sixth embodiment

[0109] In related technologies, to increase the strength of the heat distribution plate, reinforcement ribs are often arranged inside the heat distribution plate for support. These reinforcement ribs have a high fin density, a small gap, and occupy more space, resulting in a reduction in the internal space of the heat distribution plate, a reduction in the absorbed working fluid, and a reduction in the performance of the heat distribution plate.

[0110] In view of this, the present embodiment proposes a heat distribution plate 100. The heat distribution plate 100 according to the present application has strong structural strength, strong compressive strength, and excellent performance. The following provides a detailed explanation of the heat distribution plate 100 in conjunction with the main figures.

[0111] It should be noted that the difference between the sixth embodiment and the fourth embodiment is the first reinforcing structure 108, and all other structures are the same.

[0112] In this embodiment, please refer to Fig. 14. The first reinforcement structure 108 includes a first reinforcement plate c1. A plurality of second grooves c3 are formed on a side of the first reinforcement plate c1 facing away from the first plate body 103. In actual operation, the first reinforcement plate c1 is first placed on a punching machine, and a plurality of second grooves c3 are punched out on the first reinforcement plate c1. The side of the first reinforcement plate c1 having a plurality of second grooves c3 is connected to the second plate body 104, and the groove walls of the second grooves c3 and the second plate body 104 enclose a second channel used for the passage of working fluid. In this way, the groove walls of the second grooves c3 are used to support the heat distribution plate 100. The second channel is used for the passage of working fluid.In this way, the structural strength of the heat distribution plate 100 can be ensured, and the second channel is reserved for the passage of working fluid, and not too much space is occupied in the inner cavity, and no reduction in the performance of the heat distribution plate 100 is caused.

[0113] In some embodiments, the first reinforcement structure 108 is integrally formed by stamping. In practical operation, the first reinforcement structure 108 is first stamped, and then the side of the first reinforcement structure 108 having the second grooves c3 is welded to the second plate body 104, and the other side thereof abuts the first plate body 103 (similarly, the other side thereof may also be welded to the first plate body 103), thereby securing the first reinforcement structure 108 to the plate 101.

[0114] In one embodiment, the first reinforcement structure 108 may also be integrally formed by aluminum extrusion. The specific steps of integral aluminum extrusion molding may refer to conventional settings in this field and will not be repeated here.

[0115] The other structures of the sixth embodiment may refer to the settings in the fourth embodiment and will not be repeated here. Seventh embodiment

[0116] In related technologies, to increase the strength of the heat distribution plate, reinforcement ribs are often arranged inside the heat distribution plate for support. These reinforcement ribs have a high fin density, a small gap, and occupy more space, resulting in a reduction in the internal space of the heat distribution plate, a reduction in the absorbed working fluid, and a reduction in the performance of the heat distribution plate.

[0117] In view of this, the present embodiment proposes a heat distribution plate 100. The heat distribution plate 100 according to the present application has strong structural strength, strong compressive strength, and excellent performance. The following provides a detailed explanation of the heat distribution plate 100 in conjunction with the main figures.

[0118] In this embodiment, please refer to Fig. 15. The first reinforcement structure 108 includes a convex portion and a concave portion. The first reinforcement structure 108 includes a first reinforcement plate c1 formed with concave and convex shapes. The first reinforcement plate c1 in Fig. 15 is taken as an example, and the portion of the first reinforcement plate c1 facing the first plate body 103 is the convex portion, and the portion of the first reinforcement plate c1 facing the second plate body 104 is the concave portion. The concave portion and the first plate body 103 define a first fluid channel d1. The convex portion and the second plate body 104 define a second fluid channel d2. The first fluid channel d1 and the second fluid channel d2 are arranged at intervals. In this embodiment, by setting the first reinforcement plate c1 with concave and convex shapes, the space is appropriately utilized, the space occupied by the first reinforcement structure 108 is reduced, and the cooling efficiency is increased.

[0119] In this embodiment, the convex portion includes a third groove. The first reinforcement plate c1 is placed on a punching machine such that the side of the first reinforcement plate c1 facing the first plate body 103 aligns with a punching head. The punching head punches out a third groove on the first reinforcement plate c1. The groove wall of the third groove and the first plate body 103 define a first fluid channel d1. Similarly, the concave portion includes a fourth groove, and the side of the first reinforcement plate c1 facing the second plate body 104 aligns with the punching head. The punching head punches out a fourth groove on the first reinforcement plate c1. The groove wall of the fourth groove and the second plate body 104 define a second fluid channel d2.

[0120] In some embodiments, the first reinforcement structure 108 is arranged separately from the plate 101, and the first reinforcement structure 108 is integrally formed by stamping. In practical operation, the first reinforcement structure 108 is first formed by stamping, then the convex portion of the first reinforcement structure 108 is welded to the first plate body 103, and the concave portion of the first reinforcement structure 108 is welded to the second plate body 104, thereby securing the first reinforcement structure 108 to the plate 101.

[0121] In one embodiment, the first reinforcement structure 108 may also be integrally formed by aluminum extrusion. The specific steps of integral aluminum extrusion molding may refer to conventional settings in this field and will not be repeated here.

[0122] The other structures of the seventh embodiment may refer to the settings in the fourth embodiment and will not be repeated here. Eighth embodiment

[0123] In related technologies, the heat distribution plate comprises an upper shell plate and a lower shell plate. The upper shell plate and the lower shell plate are connected by welding. During the welding process, solder overflow is prone to contaminating the fluid absorption core and other structures within the heat distribution plate. Furthermore, solder overflow can cause an increase in the local thickness of the heat distribution plate and a reduction in the heat conduction effect.

[0124] In view of this, this embodiment proposes a heat distribution plate 100 with a simple structure. This can prevent solder penetration, prevent contamination of the internal structure of the heat distribution plate 100, and improve the heat conduction efficiency of the heat distribution plate 100. A detailed explanation of the heat distribution plate 100 is provided below in conjunction with the main figures.

[0125] With reference to Fig. 1, Fig. 17 and Fig. 19, the heat distribution plate comprises a plate 101 comprising a first plate body 103 and a second plate body 104 arranged opposite the first plate body 103. The first plate body 103 and the second plate body 104 enclose an internal cavity 13, a first groove 21 is provided on the first plate body 103 and / or the second plate body 104, and the first groove 21 surrounds the internal cavity 13. A solder for welding the first plate body 103 and the second plate body 104 is formed in the first groove 21.

[0126] In the technical solution of the present application, the first groove 21 is provided on the first plate body 103 and / or the second plate body 104, and the solder is formed in the first groove 21. During welding of the first plate body 103 and the second plate body 104, the solder melts and the first groove 21 is filled with the solder, which can prevent the solder from overflowing into the inner cavity 13 and contaminating other structures in the inner cavity 13.At the same time, setting the solder in the first groove 21 can not only improve the joining strength between the first plate body 103 and the second plate body 104, but also prevent the solder in the first groove 21 from overflowing during the welding process, thereby ensuring that the thickness of the heat distribution plate 100 is basically uniform, and avoiding the solder overflow, which causes the local increase in thickness of the heat distribution plate 100 and impairs the heat conduction effect of the heat distribution plate 100.

[0127] It should be noted that the specific position of the first groove 21 is not limited and can be selected according to the actual situation. In some embodiments, the first groove 21 is formed on the first plate body 103. In other embodiments, the first groove 21 is formed on the second plate body 104. In other embodiments, the first groove 21 is formed simultaneously on both the first plate body 103 and the second plate body 104.

[0128] In some embodiments, please refer to Fig. 1. The first plate body 103 is the lower shell plate, and the second plate body 104 is the upper shell plate. The upper shell plate and the lower shell plate are each provided with a first receiving slot 111b and a second receiving slot 121b. The upper shell plate and the lower shell plate are welded together so that the first receiving slot 111b and the second receiving slot 121b can communicate and form the internal cavity. It should be noted that the first reinforcement structure 108 is also provided on the heat distribution plate 100, and the specific position of the first reinforcement structure 108 is not limited as long as it can be located in the internal cavity 13. In the above embodiments, the first reinforcement structure 108 is provided on the first plate body 103.Of course, the first reinforcement structure 108 can also be provided on the second plate body 104, and the selection thereof can be made according to the actual situation. Since the first plate body 103 is the lower shell plate, providing the first reinforcement structure 108 on the first plate body 103 is more convenient for the welded connection between the first plate body 103 and the second plate body 104.

[0129] In some embodiments, a working fluid is formed in the internal cavity 13 for heat exchange. Note that the type of working fluid is not limited in the above embodiments and can be selected according to the actual application situation. For example, the working fluid can be lubricating oil, water, cold air, alcohol compounds, and so on.

[0130] See Fig. 17, Fig. 18 and Fig. 19. The first receiving slot 111b is formed on the first plate body 103. The edge of the first receiving slot 111b is folded outward to form a first connecting wall 112b. The second receiving slot 121b is formed on the second plate body 104. The edge of the second receiving slot 121b is folded outward to form a second connecting wall 122b. The first connecting wall 112b corresponds to the second connecting wall 122b. In the actual welding process, the first plate body 103 and the second plate body 104 are welded together by welding the first connecting wall 112b and the second connecting wall 122b. The first groove 21 is formed on a side of the first connecting wall 112b facing the second plate body 104, and the second plate body 104 covers the first groove 21.In this embodiment, the first groove 21 is used to receive the solder, and the second connecting wall 122b serves as a "cover plate" that covers the first groove 21 and forms a receiving cavity 23 between them. During welding, the solder melts and the receiving cavity 23 is filled with the solder. Because the second connecting wall 122b covers the first groove 21, the overflow of solder from the first groove 21 can be blocked, thereby preventing the solder from overflowing into the inner cavity 13 and contaminating the inner cavity 13.

[0131] See Fig. 21, Fig. 22 and Fig. 23. The first groove 21 has a first side edge 211 facing the inner cavity 13 and a second side edge 212 facing away from the inner cavity 13. The vertical distance from the first side edge 211 to the second side edge 212 is D1, and the width of the first connecting wall 112b is D4, where 0.05 ≤ D1 / D4 ≤ 0.25. It should be noted that the width of the first groove 21 should not be too wide or too small. If D1 / D4 is less than 0.05, the width of the first groove 21 is too narrow, and the volume of the first groove 21 decreases. If the volume of the solder remains unchanged and because the first groove 21 is too small, the solder will still overflow from the first groove 21 during welding and flow into the inner cavity 13 and contaminate the inner cavity 13.If the solder is reduced accordingly, this will cause a reduction in the joint strength between the first plate body 103 and the second plate body 104, which are prone to cracking during use. If D1 / D4 is greater than 0.25, the width of the first groove 21 is too large, resulting in a reduction in the strength of the first joint wall 112b, which is prone to fracture during the welding process.

[0132] It should be noted that the specific position of the first groove 21 is not limited and can be adjusted according to the actual situation. In this embodiment, the vertical distance from the first side edge 211 to the edge of the inner cavity 13 is D2, and the vertical distance from the second side edge 212 to a side of the first connecting wall 112b facing away from the inner cavity 13 is D3, where, 0.9 ≤ D2 / D3 ≤ 1.1. If D2 / D3 is less than 0.9, the first groove 21 is too close to the inner cavity 13, and during the welding process, the solder is still prone to intruding into and contaminating the inner cavity 13. When D2 / D3 is greater than 1.1, the first groove 21 is too far from the inner cavity 13, which can effectively avoid the penetration and contamination of the solder.However, if the first groove 21 is too close to the edge of the first connecting wall 112b, the edge of the first connecting wall 112b is prone to cracking due to heat during the welding process. The first groove 21 is located in the middle position of the first connecting wall 112b, i.e., D2 = D3. This setting can also ensure the uniformity of the force on the first connecting wall 112b during the welding process.

[0133] In some embodiments, related to Fig. 19 and Fig. 20, the edge of the second plate body 104 is formed with a second connecting wall 122b corresponding to the first connecting wall 112b. The second connecting wall 122b is provided with a protrusion 22 on a side facing the first connecting wall 112b, and the protrusion 22 covers the first groove 21. In the actual assembly process, the solder is first placed in the first groove 21, and then the second plate body 104 covers the first plate body 103 so that the protrusion 22 corresponds to the first groove 21. During the covering process, the protrusion 22 can be clamped in the first groove 21.On the one hand, the protrusion 22 cooperates with the first groove 21, which can enable pre-fixing of the first plate body 103 and the second plate body 104 and facilitate the welding operation for the operator; On the other hand, the protrusion 22 cooperates with the first groove 21, which can enable fixing of the solder in the first groove 21 and prevent penetration of solder, thereby protecting the inner cavity 13 and avoiding contamination of the inner cavity 13.

[0134] Please refer to Fig. 21 and Fig. 22. Along the thickness direction of the first plate body 103, the height of the protrusion 22 is E1 and the depth of the first groove 21 is E2. E1 is smaller than E2. In this embodiment, the height of the protrusion 22 is smaller than the depth of the first groove 21. The purpose of this setting is to prevent the solder from being squeezed out when the protrusion 22 cooperates with the first groove 21, which may cause the solder to penetrate and contaminate the internal cavity 13. At the same time, because the height of the protrusion 22 is smaller than the depth of the first groove 21, the receiving cavity 23 is formed between the first groove 21 and the protrusion 22, and the solder is formed in the receiving cavity 23. The receiving cavity 23 is used to receive the solder, thereby preventing solder overflow and contamination of the internal cavity 13.

[0135] In some embodiments, E2 - E1 + e1, where e1 is a first coefficient, 0.05 mm ≤ e1 ≤ 0.15 mm. It should be noted that e1 is the depth of the receiving cavity 23. If e1 is less than 0.05 mm, the height of the protrusion 22 is too high, resulting in the receiving cavity 23 being too shallow. If the volume of the solder remains unchanged, the solder will still overflow from the first groove 21 during welding and flow into the inner cavity 13, contaminating the inner cavity 13. If the solder volume is reduced accordingly, this will cause a reduction in the joint strength between the first plate body 103 and the second plate body 104, which are prone to cracking during use. If e1 is larger than 0.15, the height of the protrusion 22 is too small, resulting in an increase in the volume of the receiving cavity 23 and a reduction in the sealing effect of the receiving cavity 23 and a tendency for solder overflow.In this embodiment, e1 may be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, or other data not listed.

[0136] See Fig. 21, Fig. 22 and Fig. 23. The thickness of the first joint wall 112b is E3, where 0.06 ≤ E2 / E3 ≤ 0.7. It should be noted that if E2 / E3 is less than 0.06, the depth of the first groove 21 is too small and the volume of the first groove 21 is reduced. If the volume of the solder remains unchanged, the solder will still overflow from the first groove 21 during welding and flow into the inner cavity 13, contaminating the inner cavity 13. If the solder is reduced accordingly, this will cause a reduction in the joint strength between the first plate body 103 and the second plate body 104, which are prone to cracking during use. When E2 / E3 is greater than 0.7, the depth of the first groove 21 increases, and the first connecting wall 112b has reduced structural strength and is susceptible to damage.

[0137] In some embodiments, the thickness of the second connecting wall 122b is E4, where 0.05 ≤ E1 / E4 ≤ 0.6. If E1 / E4 is less than 0.05, the height of the protrusion 22 is too small, resulting in an increase in the volume of the receiving cavity 23 and a reduction in the sealing effect of the receiving cavity 23, and a tendency for solder overflow. If E1 / E4 is greater than 0.6, the height of the protrusion 22 is too high, resulting in an overly shallow depth of the receiving cavity 23. If the volume of the solder remains unchanged, the solder will still overflow from the first groove 21 during welding and flow into the inner cavity 13, contaminating the inner cavity 13; If the solder is reduced accordingly, a reduction in the joining strength between the first plate body 103 and the second plate body 104 is caused, which are prone to splitting during use.

[0138] In some embodiments, the volume of the receiving cavity 23 is V1, the volume of the solder is V2, with 0.65 ≤ V2 / V1 ≤ 1. It should be noted that if V2 / V1 is less than 0.65, the volume of the solder is too small, and the welding strength of the first plate body 103 and the second plate body 104 is reduced, which can easily lead to defects such as virtual welding; if V2 / V1 is greater than 1, the volume of the solder is too large, and it is prone to the occurrence of solder penetration during the welding process, and thus the flow of solder into the inner cavity 13 and contaminating the inner cavity 13.

[0139] See Fig. 21 and Fig. 22. The width of the first groove 21 is F1, and the width of the projection 22 is F2, where F1 = F2 + e2, where e2 is a second coefficient, and 0.03 mm ≤ e2 ≤ 0.05 mm. Note that the purpose of such adjustment is to facilitate the covering of the first plate body 103 and the second plate body 104, and the projection 22 is in a clearance fit with the first groove 21, which facilitates operation for the operator. E2 can be 0.03 mm, 0.04 mm, 0.05 mm, or other unlisted data.

[0140] In some embodiments, the heat distribution plate 100 further includes a plurality of liquid absorption cores and a mesh 120. The plurality of liquid absorption cores are located within the inner cavity 13 and are arranged on the first plate body 103 and extend along the length direction of the plate 101. The plurality of liquid absorption cores are arranged at intervals in the inner cavity 13 along the width direction of the plate 101, and the mesh 120 is arranged between the liquid absorption cores and the second plate body 104.

[0141] It should be noted that the specific materials of the fluid absorption core and the mesh 120 are not limited and can be selected according to the actual situation. In this embodiment, the fluid absorption core is a stainless steel fluid absorption core, and the mesh 120 is a stainless steel mesh 120. Stainless steel material has strong corrosion resistance and strong structural strength and cannot be damaged. In other embodiments, the fluid absorption core is a copper fluid absorption core, and the mesh 120 is a copper mesh 120.

[0142] In some embodiments, please refer to Fig. 1. Further formed on the heat distribution plate 100 is a fluid inlet 121 that communicates with the internal cavity 13. The fluid inlet 121 is provided with an injection pipe connected to the outside and used to introduce working fluid into the internal cavity 13.

[0143] The plate 101 comprises a first part, a second part, and a third part, wherein the second part is connected between the first part and the third part. See Fig. 24, in some embodiments, the first part and the third part are on the same plane, and the heat distribution plate 100 has a "1"-shaped structure. See Fig. 25, in other embodiments, the first part and the third part are located on different levels, and the heat distribution plate 100 has an "L"-shaped structure. See Fig.26, two "L"-shaped heat distribution plates 100 are joined together to form a "T"-shaped heat distribution plate 100. The selection can be made according to the actual situation.

[0144] The present application also proposes a battery including the heat distribution plate 100. The specific structure of the heat distribution plate 100 is related to the above embodiments. Since this battery adopts all the technical solutions of the above embodiments, it has at least all the advantageous effects brought about by the technical solutions of the above embodiments, which are not repeated here.

[0145] In one embodiment, the battery further includes a battery case composed of the heat distribution plate 100. That is, six sides of the battery case may be composed of the heat distribution plate 100. This arrangement can save space and increase space utilization. Note that the six heat distribution plates 100 may be in communication or not in communication, which can be selected according to the actual situation.

[0146] In some embodiments, the battery case has six housing surfaces, and the heat distribution plate 100 can be applied to each housing surface of the battery case or can be applied to multiple housing surfaces simultaneously. For example, the heat distribution plate 100 can be applied to two adjacent housing surfaces of the battery case. A first part of the heat distribution plate 100 corresponds to one housing surface, and a second part of the heat distribution plate 100 corresponds to the other housing surface, so that the heat distribution plate 100 can serve as two housing surfaces of the battery case. Specifically, the selection can be made according to the size of the battery module.

[0147] In other embodiments, the heat distribution plate 100 may further be applied within the battery, which includes the battery casing and a cell pack group. The cell pack group is mounted in the battery casing and includes at least one cell pack. The first part of the heat distribution plate 100 corresponds to one side of the cell pack, and the second part of the heat distribution plate 100 corresponds to the other side of the cell pack. To further equalize the temperature of adjacent cell packs, a heat distribution plate 100 may be arranged between two adjacent cell packs to achieve temperature equalization of the multiple sides, thereby transferring the temperature from the high-temperature part to the low-temperature part directly cooled by the cooling plate, increasing the cooling efficiency and preventing thermal runaway.

[0148] In other embodiments, the heat distribution plate 100 can be further applied to the battery module. The battery module includes multiple batteries. The first part of the heat distribution plate 100 corresponds to one side of the battery case, and the second part of the heat distribution plate 100 corresponds to the other side of the battery case. To further equalize the temperature of adjacent batteries, a heat distribution plate 100 can be arranged between two adjacent batteries to achieve temperature equalization of the multiple sides, thereby transferring the temperature from the high-temperature part to the low-temperature part, which is directly cooled by the cooling plate.

[0149] The technical solution of the eighth embodiment will be explained in more detail below using specific examples and data. It should be understood that the following examples are used only to illustrate the eighth embodiment and do not limit it.

[0150] It should be noted that the welding methods in the first to third embodiments and in the first and second comparative examples are soldering, and the solder used is solder paste. First embodiment

[0151] The first groove is formed on the first plate body, and the protrusion is formed on the second plate body. The height of the protrusion is 0.1 mm, and the depth of the first groove is 0.15 mm. Examination:

[0152] Conduct an airtightness test of the heat distribution plate, and the airtightness of the heat distribution plate is qualified;

[0153] Cut the heat distribution plate and observe the internal structure of the heat distribution plate after cutting. It is found that there is no solder on the fluid absorption core and mesh wire. Second embodiment

[0154] The first groove is formed on the first plate body, and the protrusion is formed on the second plate body. The height of the protrusion is 0.1 mm, and the depth of the first groove is 0.2 mm. Examination:

[0155] Conduct an airtightness test of the heat distribution plate, and the airtightness of the heat distribution plate is qualified;

[0156] Cut the heat distribution plate and observe the internal structure of the heat distribution plate after cutting. It is found that there is no solder on the fluid absorption core and mesh wire. Third embodiment

[0157] The first groove is formed on the first plate body, and the protrusion is formed on the second plate body. The height of the protrusion is 0.1 mm, and the depth of the first groove is 0.25 mm. Examination:

[0158] Conduct an airtightness test of the heat distribution plate, and the airtightness of the heat distribution plate is qualified;

[0159] Cut the heat distribution plate and observe the internal structure of the heat distribution plate after cutting. It is found that there is no solder on the fluid absorption core and mesh wire. First comparison example

[0160] The first groove is formed on the first plate body, and the protrusion is formed on the second plate body. The height of the protrusion is 0.15 mm, and the depth of the first groove is 0.1 mm. Examination:

[0161] Conduct air tightness test of heat distribution plate, and it shows NG in air tightness;

[0162] Cut off the heat distribution plate and observe the internal structure of the heat distribution plate after cutting. It is found that there is solder on the fluid absorption core, and the fluid absorption core is contaminated. Second comparison example

[0163] The first groove is formed on the first plate body, and the protrusion is formed on the second plate body. The height of the protrusion is 0.05 mm, and the depth of the first groove is 0.2 mm. Examination:

[0164] Conduct air tightness test of heat distribution plate, and it shows NG in air tightness;

[0165] Cut the heat distribution plate and observe the internal structure of the heat distribution plate after cutting. It is found that there is no solder on the fluid absorption core and mesh wire.

Claims

[1] Heat distribution plate (100) comprising: a plate (101) in which an internal cavity (13) is formed, wherein the plate (101) comprises a first plate body (103) and a second plate body (104) arranged opposite the first plate body (103), wherein the first plate body (103) comprises a first daughter plate body (105), a bending plate (107) and a second daughter plate body (106), wherein the bending plate (107) is connected between the first daughter plate body (105) and the second daughter plate body (106); and a first reinforcing structure (108) connected to the first plate body (103) and located in the inner cavity (13), wherein the first reinforcing structure (108) has a bending portion (110), wherein the bending portion (110) corresponds to the bending plate (107). [2] The heat distribution plate (100) according to claim 1, wherein the first reinforcement structure (108) comprises a first reinforcement plate (c1) which is bent, a first fluid channel (d1) being provided on a side of the first reinforcement plate (c1) facing the first plate body (103), and a second fluid channel (d2) being provided on a side of the first reinforcement plate (c1) facing the second plate body (104). [3] The heat distribution plate (100) according to claim 2, wherein the first reinforcement structure (108) is arranged separately from the plate (101); and / or the first reinforcement plate (c1) is integrally formed. [4] The heat distribution plate (100) according to claim 2 or 3, wherein the first reinforcing plate (c1) comprises at least one of a concave portion and a convex portion. [5] The heat distribution plate (100) according to any one of claims 1 to 4, wherein the first reinforcement structure (108) further comprises a first portion (109) and a second portion (111), the bending portion (110) being connected between the first portion (109) and the second portion (111), the first portion (109) corresponding to the first daughter plate body (105) and the second portion (111) corresponding to the second daughter plate body (106). [6] The heat distribution plate (100) according to claim 5, wherein, in an extending direction of the first daughter plate body (105), a size of the first reinforcement structure (108) in the bending portion (110) is L1, a size of the first reinforcement structure (108) in the first portion (109) is L2, and a size of the first reinforcement structure (108) in the second portion (111) is L3, where L1: (L1 + L2 + L3) = (0.1 ∼ 0.3):

1. [7] The heat distribution plate (100) according to any one of claims 1 to 6, wherein the first reinforcement structure (108) comprises a plurality of reinforcement rib groups (113) and a reinforcement bottom plate (112), the plurality of reinforcement rib groups (113) being arranged at intervals along a width direction of the first daughter plate body (105) on the reinforcement bottom plate (112), each reinforcement rib group (113) comprising a plurality of first reinforcement ribs (114) arranged at intervals along the width direction of the first daughter plate body (105), wherein in the width direction of the first daughter plate body (105), a size of the reinforcement bottom plate (112) is L4 and a size of the first reinforcement rib (114) is L5, where L5: L4 = (0.005 ∼ 0.05):

1. [8] The heat distribution plate (100) according to any one of claims 5 to 7, wherein the first reinforcement structure (108) comprises a plurality of reinforcement rib groups (113), each reinforcement rib group (113) comprising a plurality of first reinforcement ribs (114), the plurality of first reinforcement ribs (114) being arranged at intervals along the width direction of the first daughter plate body (105), each first reinforcement rib (114) comprising two first daughter reinforcement ribs (115) and a plurality of second daughter reinforcement ribs (116), the two first daughter reinforcement ribs (115) being located in the first section (110) and the second section (111), respectively, the plurality of second daughter reinforcement ribs (116) being arranged between the two daughter reinforcement ribs (115) and being located in the bending section (110). [9] The heat distribution plate (100) according to claim 8, wherein a number of the second subsidiary reinforcing ribs (116) of each first reinforcing rib (114) is n1 and a number of the first reinforcing ribs (114) of each reinforcing rib group (113) is n2, with n1 = n2. [10] The heat distribution plate (100) according to any one of claims 1 to 9, further comprising a second reinforcement structure (122), wherein the second reinforcement structure (122) is provided on the first daughter plate body (105) and the second daughter plate body (106), and the second reinforcement structure (122) is located in the inner cavity (13), wherein the second reinforcement structure (122) comprises a plurality of sub-reinforcement ribs, wherein a density of the plurality of sub-reinforcement ribs on the plate (101) is V1, and a density of the plurality of second daughter reinforcement ribs (116) on the plate (101) is V2, where V1 : V2 = (2 ∼ 6) :

1. [11] The heat distribution plate (100) according to any one of claims 8 to 10, wherein, in a length direction of the first daughter plate body (105), a size of the first reinforcement structure (108) in the bending portion (110) is L1, a size of the first reinforcement structure (108) in the first portion (109) is L2, a size of the first reinforcement structure (108) in the second portion (111) is L3, and a size of each second daughter reinforcement rib (116) is L6, where L6: (L1 + L2 + L3) = (0.03 ∼ 0.2):

1. [12] The heat distribution plate (100) according to any one of claims 1 to 11, wherein the first reinforcement structure (108) is integrally formed with the plate (101). [13] The heat distribution plate (100) according to any one of claims 1 to 12, wherein a bending angle of the bending plate (107) is α, a bending angle of the bending portion (110) is β, with 90° ≤ α ≤ 95°, 90° ≤ β ≤ 95°, and α = β. [14] Heat distribution plate (100) according to one of claims 1 to 13, wherein a fluid channel is formed between the first reinforcing structure (108) and the first plate body (103) and / or the second plate body (104), and the fluid channel is configured for a flow of working fluid in the internal cavity (13). [15] The heat distribution plate (100) according to claim 14, wherein the first reinforcement structure (108) comprises a first reinforcement plate (c1), a second reinforcement plate (c0), and a plurality of partition plates (a1); wherein the first reinforcement plate (c1) and the second reinforcement plate (c0) are arranged opposite each other and connected to each other to enclose an overall channel extending along a length direction of the first plate body (103), wherein the plurality of partition plates (a1) are connected between the first reinforcement plate (c1) and the second reinforcement plate (c0) to divide the overall channel into a plurality of subsidiary channels (a2) along a width direction of the first plate body (103) configured for the passage of working fluid; wherein the fluid channel comprises a plurality of subsidiary channels (a2). [16] The heat distribution plate (100) according to claim 14 or 15, wherein the first reinforcement structure (108) comprises a first reinforcement plate (c1), wherein a plurality of first grooves (c2) are formed on a side of the first reinforcement plate (c1) facing the first plate body (103), wherein the groove walls of the first grooves (c2) and the first plate body (103) enclose a first channel configured for a passage of working fluid; wherein the fluid channel comprises the first channel. [17] The heat distribution plate according to any one of claims 14 to 16, wherein the first reinforcement structure (108) comprises a first reinforcement plate (c1), wherein a plurality of second grooves (c3) are formed on a side of the first reinforcement plate (c1) facing away from the first plate body (103), wherein the groove walls of the second grooves (c3) and the second plate body (104) enclose a second channel configured for the passage of working fluid; wherein the fluid channel comprises the second channel. [18] Heat distribution plate (100) according to one of claims 1 to 17, wherein the first reinforcement structure (108) comprises a first reinforcement plate (c1), the first reinforcement plate (c1) being formed with concave and convex shapes, a first fluid channel (d1) being provided on a side of the first reinforcement plate (c1) facing the first plate body (103), and a second fluid channel (d2) being provided on a side of the first reinforcement plate (c1) facing the second plate body (104). [19] Heat distribution plate (100) according to one of claims 15 to 18, wherein a third groove is provided on a side of the first reinforcement plate (c1) facing the first plate body (103), wherein a groove wall of the third groove and the first plate body (103) enclose the first fluid channel (d1); wherein a fourth groove is provided on a side of the first reinforcement plate (c1) facing the second plate body (104), wherein a groove wall of the fourth groove and the second plate body (104) enclose the second fluid channel (d2). [20] The heat distribution plate (100) according to any one of claims 15 to 19, wherein the first reinforcing plate (c1) is integrally formed. [21] The heat distribution plate (100) according to any one of claims 1 to 20, wherein the plate (101) comprises a stainless steel plate (101); and / or wherein the first reinforcement structure (108) comprises a first stainless steel reinforcement structure. [22] Heat distribution plate (100) according to one of claims 1 to 21, wherein the first reinforcing structure (108) abuts the second plate body (104). [23] Heat distribution plate (100) according to one of claims 1 to 22, wherein a first groove (21) is arranged on the first plate body (103) and / or the second plate body (104), wherein the first groove (21) surrounds the inner cavity (13), wherein a solder for welding the first plate body (103) and the second plate body (104) is formed in the first groove (21). [24] Heat distribution plate (100) according to claim 23, wherein a first connecting wall (112b) is formed on an edge of the first plate body (103) and the first connecting wall (112b) abuts the inner cavity (13), wherein the first groove (21) is formed on a side of the first connecting wall (112b) facing the second plate body (104), wherein the second plate body (104) covers the first groove (21). [25] Heat distribution plate (100) according to claim 24, wherein the first groove (21) has a first side edge (211) facing the inner cavity (13) and a second side edge (212) facing away from the inner cavity (13), wherein a vertical distance from the first side edge (211) to the second side edge (212) is D1, and a width of the first connecting wall (112b) is D4, with 0.05 ≤ D1 / D4 ≤ 0.

25. [26] Heat distribution plate (100) according to claim 25, wherein a vertical distance from the first side edge (211) to the edge of the inner cavity (13) is D2, and a vertical distance from the second side edge (212) to the side of the first connecting wall (112b) facing away from the inner cavity (13) is D3, with 0.9 ≤ D2 / D3 ≤ 1.

1. [27] Heat distribution plate (100) according to one of claims 24 to 26, wherein a second connecting wall (122b) is formed on an edge of the second plate body (104) and the second connecting wall (122b) abuts against the inner cavity (13), the second connecting wall (122b) corresponding to the first connecting wall (112b), a projection (22) being provided on a side of the second connecting wall (122b) facing the first connecting wall (112b), the projection (22) being embedded in the first groove (21). [28] The heat distribution plate (100) according to claim 27, wherein along a thickness direction of the first plate body (103), a height of the projection (22) is E1, a depth of the first groove (21) is E2, where E1 is smaller than E2, so that a receiving cavity (23) is formed between the first groove (21) and the projection (22), and the solder is formed in the receiving cavity (23). [29] Heat distribution plate (100) according to claim 28, wherein E2 = E1 + e1, where e1 is a first coefficient, with 0.05 mm ≤ e1 ≤ 0.15 mm. [30] Heat distribution plate (100) according to one of claims 27 to 29, wherein a thickness of the first connecting wall (112b) is E3, with 0.06 ≤ E2 / E3 ≤ 0.7; and / or wherein a thickness of the second connecting wall (122b) is E4, with 0.05 ≤ E1 / E4 ≤ 0.

6. [31] Heat distribution plate (100) according to one of claims 28 to 30, wherein a volume of the receiving cavity (23) is V1, a volume of the solder is V2, with 0.65 ≤ V2 / V1 ≤ 1. [32] Heat distribution plate (100) according to one of claims 27 to 31, wherein a width of the first groove (21) is F1, a width of the projection (22) is F2, with F1 = F2 + e2, where e2 is a second coefficient, with 0.03 mm ≤ e2 ≤ 0.05 mm. [33] A battery comprising a heat distribution plate (100) according to any one of claims 1 to 32. [34] A battery module comprising a heat distribution plate (100) according to any one of claims 1 to 32 or a battery according to claim 33.

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