Immersed battery heat dissipation structure

Abstract

The utility model discloses an immersed battery heat dissipation structure which comprises a heat dissipation piece which is of a block-shaped structure, the heat dissipation piece is concaved inwards from the top face of the heat dissipation piece in the vertical direction to form a plurality of mounting holes for containing battery cells, and flowing cavities are formed between the outer walls of the battery cells and the inner walls of the mounting holes; the fixing piece is fixed between the battery cell and the mounting hole and seals the flowing cavity; wherein a plurality of medium holes communicated with the flowing cavities are formed in the heat dissipation part in the horizontal direction in a penetrating mode, each medium hole comprises an input end and an output end, and cooling media input from the input ends can be evenly distributed to the different flowing cavities through the medium holes and flow out from the output ends. By the adoption of the structure, the fixing strength of the battery cells can be improved, and the consistency of the temperatures of the battery cells in the heat dissipation process is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heat dissipation, in particular to an immersion type battery heat dissipation structure. Background Art

[0002] As a new type of heat dissipation method, immersion heat dissipation has high heat exchange efficiency and balanced heat dissipation compared to traditional air cooling and water cooling. For example, Chinese invention patent CN106972191A discloses a battery module, including a shell, a fixed bracket and a plurality of battery cells. The shell is surrounded by four side panels. The fixed bracket includes an upper plate covering the top of the shell and a lower plate covering the bottom of the shell. The upper plate and the lower plate are provided with a plurality of mounting holes. The upper end of the battery cell is embedded in the mounting hole of the upper plate, and the lower end is embedded in the mounting hole of the lower plate. The shell and the fixed bracket cooperate to form a flow space. All or most of the battery cells are located in the flow space. The shell is provided with a coolant inlet and a coolant outlet communicating with the flow space to input and output coolant to the flow space to dissipate heat for the battery cells.

[0003] However, with the above structure, the structural strength of the battery cell is low after it is fixed, and the force is concentrated. The battery cell is easily damaged when it falls or collides, and there is a safety hazard in long-term use. In addition, due to the large overall volume of the flow space, it is difficult to control the uniformity of the coolant input and output in each area of ​​the flow space. The temperature consistency of each battery cell during the heat dissipation process is poor, which affects the cycle life and safety of the battery module.

[0004] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0005] The utility model aims to provide an immersed battery heat dissipation structure, which has high reliability and good heat dissipation consistency after each battery cell is installed.

[0006] The purpose of the utility model is achieved through the following technical solutions: an immersion type battery heat dissipation structure, comprising:

[0007] The heat sink is a block structure, wherein the heat sink is vertically recessed inward from the top surface thereof to form a plurality of mounting holes for accommodating the battery cells, and a flow cavity is formed between the outer wall of the battery cell and the inner wall of the mounting hole;

[0008] A fixing member, fixed between the battery core and the mounting hole, and closing the flow cavity;

[0009] The heat sink is provided with a plurality of medium holes connected to the flow cavity in the horizontal direction, and the medium holes include an input end and an output end. The cooling medium input from the input end can be evenly distributed to different flow cavities through the medium holes and flow out from the output end.

[0010] Furthermore, the battery core is a cylindrical battery core, the mounting hole is a circular hole whose inner diameter is larger than the outer diameter of the battery core, and the battery core is coaxially arranged with the mounting hole.

[0011] Further, the mounting hole is a blind hole with a closed bottom, the fixing piece is located near the top of the mounting hole, and the bottoms of several mounting holes are recessed inward to form a positioning groove adapted to the bottom contour of the battery cell; or,

[0012] The mounting hole is a through hole that penetrates in the vertical direction, the fixing piece is located near the top of the mounting hole, a base plate that closes the bottom of the mounting hole is detachably fixed to the bottom of the heat sink, and the top of the base plate is recessed inward to form a positioning groove that matches the bottom contour of the battery cell, and there are multiple positioning grooves, which correspond one-to-one to the mounting holes.

[0013] Furthermore, the plurality of mounting holes are arranged in a rectangular array along a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, the opening directions of the plurality of medium holes are all in the first horizontal direction or in the second horizontal direction, the input ends of the plurality of medium holes are all located on the same side, and the output ends of the plurality of medium holes are all located on the same side.

[0014] Furthermore, the plurality of mounting holes are divided into a plurality of mounting hole groups, and the plurality of mounting holes in each mounting hole group are arranged at intervals along the opening direction of the medium holes, and in the opening direction of the medium holes, the projections of the plurality of medium holes are evenly distributed at various positions of the projections of the mounting hole group.

[0015] Furthermore, the fixing member is an annular structure, the inner wall of the fixing member is in sealing contact with the outer wall of the battery core, and the outer wall of the fixing member is in sealing contact with the inner wall of the mounting hole.

[0016] Furthermore, the heat sink and the fixing member are both made of insulating material.

[0017] Furthermore, the battery cell portion protrudes relative to the top of the mounting hole, and the heat dissipation structure also includes a cover plate detachably fixed to the top of the heat dissipation component, and the cover plate is provided with avoidance holes through-through in the vertical direction for avoiding the battery cell, and there are multiple avoidance holes, which correspond one-to-one to the battery cells.

[0018] Furthermore, the inner wall of the avoidance hole is in sealed contact with the outer wall of the battery core.

[0019] Furthermore, a plurality of the mounting holes are arranged in a rectangular array along a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, a pressing portion for abutting against the top of the battery cell is provided on the top of the cover plate, and there are a plurality of the pressing portions, which are arranged in a rectangular array along the first horizontal direction and the second horizontal direction, and in the vertical direction, a projection of a single pressing portion is suitable for overlapping with the projection portion of one or more of the battery cells.

[0020] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a heat sink with a block structure, and a plurality of mounting holes are concavely provided inwardly from the top surface of the heat sink. The battery cells are accommodated in different mounting holes, which can enhance the structural strength between the battery cells, and are not easily damaged when falling or colliding, thereby reducing safety hazards; in addition, a flow cavity is formed between each battery cell and the mounting hole, and a plurality of medium holes communicating with the flow cavity are provided, so that the cooling medium input from the input end can be evenly diverted to different flow cavities under the guidance of the medium holes, and finally flow out from the output end, thereby ensuring the consistency of the temperature of each battery cell during the heat dissipation process and improving the cycle life and safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the installation of the heat dissipation structure and the battery core of the utility model.

[0022] Figure 2 yes Figure 1 Schematic cross-section diagram of .

[0023] Figure 3 yes Figure 2 A partial enlarged view of point A.

[0024] Figure 4 It is a structural schematic diagram of the heat dissipation element in the utility model.

[0025] Figure 5 yes Figure 1 Schematic diagram of the structure with the cover installed.

[0026] Figure 6 It is a structural schematic diagram of the cover plate in the utility model.

[0027] Description of reference numerals:

[0028] 100, heat sink; 110, mounting hole; 120, dielectric hole; 130, positioning groove; 140, first side; 150, second side; 200, battery cell; 300, flow cavity; 400, fixing member; 500, bottom plate; 600, cover plate; 610, avoidance hole; 620, pressing portion. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] See also Figures 1 to 4 As shown, an immersion battery heat dissipation structure corresponding to a preferred embodiment of the utility model is used to fix and dissipate heat for the battery. The heat dissipation structure includes a heat dissipation element 100 of a block structure, and the heat dissipation element 100 is recessed inward from its top surface along the vertical direction to form a plurality of mounting holes 110, and a plurality of battery cells 200 of the battery are respectively placed in different mounting holes 110. A flow cavity 300 is formed between the outer wall of the battery cell 200 and the inner wall of the mounting hole 110. The heat dissipation structure also includes a fixing element 400, which is fixed between the battery cell 200 and the mounting hole 110 and closes the flow cavity 300. Among them, the heat dissipation element 100 is provided with a plurality of medium holes 120 through it in the horizontal direction, and the medium holes 120 are connected to the flow cavity 300. The medium holes 120 include an input end and an output end for inputting and outputting cooling medium. The cooling medium input from the input end can be evenly distributed to different flow cavities 300 through the medium holes 120, and finally flows out from the output end.

[0033] The utility model provides a heat sink 100 with a block structure, and the heat sink 100 is provided with a plurality of mounting holes 110 inwardly concave from the top surface thereof. The battery cells 200 are accommodated in different mounting holes 110, which can enhance the structural strength between the battery cells 200, and are not easily damaged when falling or colliding, thereby reducing potential safety hazards. In addition, a flow cavity 300 is formed between each battery cell 200 and the mounting hole 110, and a plurality of medium holes 120 communicating with the flow cavity 300 are provided, so that the cooling medium input from the input end can be evenly diverted to different flow cavities 300 under the guidance of the medium holes 120, and finally flows out from the output end, thereby ensuring the consistency of the temperature of each battery cell 200 during the heat dissipation process, and improving the cycle life and safety of the battery.

[0034] Furthermore, in this embodiment, the battery cell 200 is preferably a cylindrical battery cell, the mounting hole 110 is a circular hole with an inner diameter larger than the outer diameter of the battery cell 200, and the battery cell 200 is coaxially arranged with the mounting hole 110. In this way, the dead angle of the flow cavity 300 is reduced and the smoothness of the cooling medium flow process is improved.

[0035] Furthermore, in one embodiment, the mounting hole 110 is a blind hole with a closed bottom, the fixing member 400 is located near the top of the mounting hole 110, and the bottoms of several mounting holes 110 are recessed inward to form a positioning groove 130 adapted to the bottom contour of the battery cell 200, ensuring that after the battery cell 200 is installed in the mounting hole 110, the battery cell 200 is precisely coaxial with the mounting hole 110, thereby improving the convenience of installation.

[0036] Of course, in other embodiments, the mounting hole 110 can also be a through hole that penetrates in the vertical direction, and a bottom plate 500 that closes the bottom of several mounting holes 110 is detachably fixed to the bottom of the heat sink 100, and threaded fasteners can be used to fix the bottom plate 500 and the heat sink 100, and the top of the bottom plate 500 is recessed inward to form a positioning groove 130 that matches the bottom contour of the battery cell 200, and there are multiple positioning grooves 130, which correspond to the mounting holes 110 one by one. The mounting holes 110 in the form of through holes are more convenient to process and shape with the bottom plate 500 with the positioning grooves 130.

[0037] Furthermore, a plurality of mounting holes 110 are arranged in a rectangular array along a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, a plurality of medium holes 120 are opened in the first horizontal direction or in the second horizontal direction, input ends of the plurality of medium holes 120 are located on the same side, and output ends of the plurality of medium holes 120 are located on the same side to facilitate centralized input and output of cooling medium.

[0038] The plurality of mounting holes 110 are divided into a plurality of mounting hole groups, and the plurality of mounting holes 110 in each mounting hole group are arranged at intervals along the opening direction of the medium hole 120. In the opening direction of the medium hole 120, the projections of the plurality of medium holes 120 are evenly distributed at various positions of the projections of the mounting hole group. In this way, on the basis of ensuring that the cooling medium can flow to different positions of the flow cavity 300, the effect of uniformly cooling different positions of the battery cell 200 is achieved, and by controlling the cooling medium flow rate of each medium hole 120, the temperature consistency of the entire battery can be further ensured.

[0039] Furthermore, the overall profile of the heat sink 100 is preferably in a block shape, so as to effectively and reasonably utilize the space of the heat sink 100 when the array mounting holes 110 and the medium holes 120 are arranged, and it is also convenient to open the mounting holes 110 and the medium holes 120. The heat sink 100 includes a first side surface 140 and a second side surface 150 arranged opposite to each other in the opening direction of the medium holes 120, the medium holes 120 pass through from the first side surface 140 to the second side surface 150, the input ends of the medium holes 120 are all located on the first side surface 140, and the output ends of the medium holes 120 are all located on the second side surface 150.

[0040] In one embodiment, each end of the medium hole 120 may be connected to a delivery pipeline (not shown), and the delivery pipeline is used to connect with a medium circulation device (not shown) to deliver cooling medium to the input end of the medium hole 120 and receive cooling medium at the output end of the medium hole 120. Of course, in other embodiments, in order to facilitate the input and output of cooling medium, the heat dissipation structure is provided with a cover (not shown) at the first side 140 and the second side 150, and a plurality of sealed cavities are formed in the cover, and the cavity is provided with a medium inlet and outlet connected to the medium circulation device, and each cavity is connected to a preset number of medium holes 120, thereby reducing the setting of the delivery pipeline. The cooling medium can be gas or liquid, which is not limited by the present invention.

[0041] Further, the fixing member 400 is an annular structure, the inner wall of the fixing member 400 is in sealing contact with the outer wall of the battery cell 200, and the outer wall of the fixing member 400 is in sealing contact with the inner wall of the mounting hole 110 to close the flow cavity 300. The fixing member 400 can be integrally formed with the battery cell 200 or the heat sink 100 to simplify the assembly process. There are multiple fixing members 400, and they correspond one to one with the mounting holes 110 and / or the battery cells 200.

[0042] Preferably, the heat sink 100 and the fixing member 400 are both made of insulating material to insulate each battery cell 200 after installation. When the heat dissipation structure falls or collides, the battery cells 200 will not contact each other due to the obstruction of the inner wall of the mounting hole 110, thereby avoiding a direct short circuit between the positive and negative poles of the battery cells 200.

[0043] Furthermore, the battery cell 200 may protrude relative to the top of the mounting hole 110 or may not protrude relative to the top of the mounting hole 110. When the battery cell 200 does not protrude relative to the top of the mounting hole 110, the heat dissipation effect of the battery cell 200 is better, and the top of the battery cell 200 is preferably flush or substantially flush with the top of the heat sink 100, so as to facilitate the installation of the conductive member (not shown) for connecting the battery cells 200 in series and parallel.

[0044] In addition, refer to Figure 5 and Figure 6 As shown, when the battery cell 200 partially protrudes relative to the top of the mounting hole 110, the heat dissipation structure also includes a cover plate 600 detachably fixed to the top of the heat sink 100, and the cover plate 600 and the heat sink 100 can be fixed by threaded fasteners. The cover plate 600 is provided with a avoidance hole 610 for avoiding the battery cell 200 in the vertical direction. There are multiple avoidance holes 610, and they correspond to the battery cells 200 one by one. The inner wall of the avoidance hole 610 is preferably in sealing contact with the outer wall of the battery cell 200 to further improve the sealing effect of the flow chamber 300. The top of the battery cell 200 is preferably flush or approximately flush with the top of the avoidance hole 610 to facilitate the installation of the conductive member.

[0045] Preferably, a pressing portion 620 is provided on the top of the cover plate 600. The pressing portion 620 is used to abut against the top of the battery cell 200. There are multiple pressing portions 620, which are arranged in a rectangular array along the first horizontal direction and the second horizontal direction. In the vertical direction, the projection of a single pressing portion 620 is suitable for partially overlapping with the projection of one or more battery cells 200. By adopting the above structure, the battery cell 200 can be limited in the vertical direction, and the reliability and stability of the battery cell 200 after installation are improved. Since the pressing portions 620 are arranged in a rectangular array along the first horizontal direction and the second horizontal direction, there is a non-zero gap between two adjacent pressing portions 620, so that an installation space 630 arranged along the first horizontal direction and the second horizontal direction is formed between the pressing portions 620. The installation space 630 can accommodate and position the conductive member, and the installation convenience is improved.

[0046] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An immersion battery heat dissipation structure, characterized in that: include: The heat sink (100) is a block structure, the heat sink (100) is recessed inwardly along the vertical direction from the top surface thereof to form a plurality of mounting holes (110) for accommodating the battery cells (200), and a flow cavity (300) is formed between the outer wall of the battery cell (200) and the inner wall of the mounting hole (110); A fixing member (400) is fixed between the battery core (200) and the mounting hole (110) and closes the flow cavity (300); The heat sink (100) is provided with a plurality of medium holes (120) in a horizontal direction and connected to the flow cavity (300); the medium holes (120) include an input end and an output end; the cooling medium input from the input end can be evenly distributed to different flow cavities (300) through the medium holes (120) and flow out from the output end.

2. The submerged battery heat dissipation structure according to claim 1, characterized in that: The battery core (200) is a cylindrical battery core, the mounting hole (110) is a circular hole with an inner diameter greater than an outer diameter of the battery core (200), and the battery core (200) and the mounting hole (110) are coaxially arranged.

3. The submerged battery heat dissipation structure according to claim 1, characterized in that: The mounting hole (110) is a blind hole with a closed bottom, the fixing member (400) is located near the top of the mounting hole (110), and the bottoms of several mounting holes (110) are recessed inward to form positioning grooves (130) that match the bottom contour of the battery cell (200); or, The mounting hole (110) is a through hole that penetrates in the vertical direction. The fixing member (400) is located near the top of the mounting hole (110). A bottom plate (500) that closes the bottom of the mounting hole (110) is detachably fixed to the bottom of the heat sink (100). The top of the bottom plate (500) is recessed inward to form a positioning groove (130) that matches the bottom contour of the battery cell (200). There are a plurality of positioning grooves (130) that correspond one to one with the mounting holes (110).

4. The submerged battery heat dissipation structure according to claim 1, characterized in that: The plurality of mounting holes (110) are arranged in a rectangular array along a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, the opening directions of the plurality of medium holes (120) are all in the first horizontal direction or in the second horizontal direction, the input ends of the plurality of medium holes (120) are all located on the same side, and the output ends of the plurality of medium holes (120) are all located on the same side.

5. The submerged battery heat dissipation structure according to claim 4, characterized in that: The plurality of mounting holes (110) are divided into a plurality of mounting hole groups, the plurality of mounting holes (110) in each mounting hole group are arranged at intervals along the opening direction of the medium hole (120), the mounting hole group forms a projection in the opening direction of the medium hole (120), and in the opening direction of the medium hole (120), the projections of the plurality of medium holes (120) are evenly distributed at various positions of the projection of the mounting hole group.

6. The submerged battery heat dissipation structure according to claim 1, characterized in that: The fixing member (400) is an annular structure, the inner wall of the fixing member (400) is in sealing contact with the outer wall of the battery core (200), and the outer wall of the fixing member (400) is in sealing contact with the inner wall of the mounting hole (110).

7. The submerged battery heat dissipation structure according to claim 1, characterized in that: The heat sink (100) and the fixing member (400) are both made of insulating material.

8. The submerged battery heat dissipation structure according to claim 1, characterized in that: The battery cell (200) partly protrudes relative to the top of the mounting hole (110), and the heat dissipation structure further comprises a cover plate (600) detachably fixed to the top of the heat dissipation element (100), and the cover plate (600) is provided with an escape hole (610) penetrating in a vertical direction for evading the battery cell (200), and the escape holes (610) are multiple in number and correspond one to one to the battery cells (200).

9. The submerged battery heat dissipation structure according to claim 8, characterized in that: The inner wall of the avoidance hole (610) is in sealing contact with the outer wall of the battery core (200).

10. The submerged battery heat dissipation structure according to claim 8, characterized in that: The plurality of mounting holes (110) are arranged in a rectangular array along a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction. The top of the cover plate (600) is provided with a pressing portion (620) for abutting against the top of the battery cell (200). There are a plurality of pressing portions (620) and they are arranged in a rectangular array along the first horizontal direction and the second horizontal direction. In the vertical direction, the projection of a single pressing portion (620) is suitable for partially overlapping with the projection of one or more battery cells (200).

Images