Battery pack
By adopting a comb-shaped heat-diffusion-free cooling structure in the battery pack and using the cavity structure for air cooling, the problem of low heat dissipation efficiency in the battery pack is solved, achieving more efficient cooling performance and extended battery life.
Patent Information
- Application Number
- CN202420582492.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-07-21
- Filing Date
- 2024-03-25
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-03-25
AI Technical Summary
The heat generated by existing battery packs during charging and discharging is difficult to effectively disperse, resulting in heat transfer problems between battery cells, which may lead to overheating and battery damage.
Using a battery pack with a comb-shaped heat-diffusion-free cooling structure, the heat conduction block, substrate and fins are arranged between the battery cell and the radiator, and the cavity structure is used to cool air to block heat conduction between the heat conduction blocks to ensure Heat is quickly dissipated to the outside through the radiator.
It effectively improves the cooling performance of the battery pack, prevents heat transfer between the battery cells, ensures rapid heat dissipation, reduces the internal temperature of the battery pack, and extends the battery life.
Smart Images
Figure CN222214266U_ABST
Abstract
Description
[0001] CROSS-REFERENCE TO RELATED APPLICATIONS
[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0039350 filed in the Korean Intellectual Property Office on March 26, 2023, and Korean Patent Application No. 10-2023-0095482 filed in the Korean Intellectual Property Office on July 21, 2023, the disclosures of which are incorporated herein by reference in their entirety. Technical Field
[0003] Embodiments relate to a battery pack provided with a heat-diffusion-free cooling structure having a comb shape. Background Art
[0004] Recently, the production and use of vehicles or hybrid vehicles using electric energy have increased significantly. Electric vehicles or hybrid vehicles are equipped with battery packs. The battery pack may include a plurality of battery modules, each of which includes a plurality of battery cells. Each battery cell may include a positive electrode, a negative electrode, a separator, an active material, an electrolyte, etc., and may be repeatedly charged and discharged through an electrochemical reaction. Utility Model Content
[0005] An embodiment may be implemented by providing a battery pack equipped with a heat-diffusion-free cooling structure having a comb shape, the battery pack comprising: a plurality of battery cells arranged along a first direction; a heat sink facing the plurality of battery cells in a second direction different from the first direction, the heat sink continuously extending along the plurality of battery cells; and a heat-conducting block between the heat sink and the plurality of battery cells, wherein each of the heat-conducting blocks comprises: a substrate on one side of one of the plurality of battery cells; and a first cavity and a plurality of fins alternately arranged along the first direction, the first cavity and the plurality of fins being between the substrate and the heat sink.
[0006] The plurality of fins may be adjacent to each other in a first direction with the first cavity between the plurality of fins, and the plurality of fins may be adjacent to each other in a third direction with the second cavity between the plurality of fins, the third direction being different from the first direction and the second direction.
[0007] The plurality of fins may be arranged along the first direction and the third direction such that a width of the first cavity in the first direction is smaller than a width of the second cavity in the third direction.
[0008] The battery pack may further include a third cavity between the outwardly facing fins of the thermally conductive block adjacent to each other in the first direction.
[0009] The third cavity may be between the adjacent substrate and the heat sink and be at the same level as the first cavity and the second cavity.
[0010] The battery pack may further include an insulating sheet, the insulating sheet may be between the plurality of battery cells adjacent to each other in the first direction, and the insulating sheet may at least partially extend between the thermally conductive blocks adjacent to each other in the first direction.
[0011] An insulating sheet may be further between adjacent substrates, wherein the third cavity is between the adjacent substrates and the heat sink and spans the insulating sheet between the adjacent substrates, and a width of the third cavity in the first direction is greater than a width of the first cavity in the first direction.
[0012] The insulating sheet may extend from between adjacent battery cells among the plurality of battery cells to between adjacent thermally conductive blocks in the second direction, and the extending end of the insulating sheet may be in the third cavity between outwardly facing fins of thermally conductive blocks adjacent to each other in the first direction.
[0013] The insulating sheet may have a first thickness between the plurality of battery cells adjacent to each other in the first direction, and may have a second thickness between the substrates of the thermally conductive blocks adjacent to each other in the first direction, the second thickness being different from the first thickness.
[0014] The second thickness may be less than the first thickness.
[0015] The insulating sheet may surround side surfaces of the substrates of the heat conductive blocks adjacent to each other and portions of the top and bottom surfaces of the substrates adjacent to the side surfaces. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Features will become apparent to those skilled in the art by describing in detail exemplary embodiments with reference to the accompanying drawings, in which:
[0017] Figure 1 An example of a cooling structure of a comparative battery pack is shown;
[0018] Figure 2 for Figure 1 A side view of a battery pack shown in FIG.
[0019] Figure 3 Showing a cooling structure of a battery pack according to the present disclosure;
[0020] Figure 4 for Figure 3 An exploded perspective view of the main components of the cooling structure of the battery pack shown in FIG.
[0021] Figure 5 For Figure 3 A view from a third direction Z shown in FIG.
[0022] Figure 6 for Figure 5 A magnified view of the thermal block area; and
[0023] Figure 7 For Figure 3 A view viewed in a first direction X is shown. DETAILED DESCRIPTION
[0024] Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey exemplary implementations to those skilled in the art.
[0025] In the drawn figures, the dimensions of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when a layer or element is referred to as being "on" another layer or element, it can be directly on the other layer or element, or there can be intervening layers or elements. Further, it will be understood that when a layer is referred to as being "below" another layer, it can be directly below the other layer, or there can be one or more intervening layers. In addition, it will be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more intervening layers. Throughout the text, the same reference numerals refer to the same elements.
[0026] When a part is said to "include" a component, the part may not exclude another component, but may further include another component, unless otherwise specified. More specifically, it should be understood that the terms "include", "have", etc. used in this document are used to indicate the presence of the features, numbers, steps, operations, components, parts or combinations thereof described in the specification, and do not exclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.
[0027] Singular forms include plural forms unless the context clearly indicates otherwise.
[0028] Figure 3 A cooling structure of a battery pack according to the present disclosure is shown. Figure 4 for Figure 3 An exploded perspective view of the main components of the cooling structure of the battery pack is shown in FIG. Figure 5 For Figure 3 A third view viewed from direction Z is shown in FIG. Figure 6 for Figure 5 Magnified view of the thermal block area. Figure 7 For Figure 3 A view viewed in a first direction X is shown.
[0029] refer to Figure 3 to Figure 7A battery pack (hereinafter, referred to as a “battery pack”) equipped with a heat-diffusion-free cooling structure having a comb shape according to an embodiment of the present disclosure may include a plurality of battery cells 20 , a heat sink 30 , and a thermally conductive block 40 .
[0030] A plurality of battery cells 20 may be arranged inside the housing at intervals along the first direction X. The plurality of battery cells 20 may form a battery module.
[0031] The heat sink 30 may face the battery cell 20 in a second direction Y different from the first direction X. The heat sink 30 may extend continuously in the first direction X along one side (e.g., bottom side) of the adjacent battery cell 20. The heat sink 30 may be made of a material having excellent thermal conductivity. The heat sink 30 may quickly transfer the heat generated in the battery cell 20 to the outside to dissipate the heat.
[0032] The heat conductive block 40 may be between the heat sink 30 and the battery cell 20. The heat conductive block 40 may include a base plate 42 and fins 44.
[0033] The substrate 42 may be separated or separated for each battery cell 20 in the first direction X. In one embodiment, one substrate 42 may be used for or correspond to one battery cell 20, for example, each substrate 42 may be on one side of the corresponding battery cell 20. The fin 44 may be a structure between the substrate 42 and the heat sink 30. The fin 44 may include a cantilever structure extending from the substrate 42. In one embodiment, a plurality of fins 44 may be provided. The first cavity 46 may be between the fins 44 and between the substrate 42 and the heat sink 30. The fins 44 and the first cavities 46 may be alternately arranged along the first direction X.
[0034] The fins 44 may be adjacent to each other in a first direction X with first cavities 46 between the fins 44. The fins 44 may be adjacent to each other in a third direction Z (which is different from the first direction X and the second direction Y) with second cavities 47 between the fins 44.
[0035] The fins 44 may be arranged along the first direction X and the third direction Z such that a width w1 of the first cavity 46 in the first direction X is smaller than a width w2 of the second cavity 47 in the third direction Z.
[0036] The third cavity 48 may be between the thermally conductive blocks 40 adjacent to each other in the first direction X and between the fins 44 closest to each other (eg, the third cavity 48 may be between the outwardly facing fins 44 of the thermally conductive blocks 40 corresponding to the battery cells 20 adjacent to each other in the first direction X).
[0037] The third cavity 48 may be formed to span across or between the substrates 42 adjacent to each other in the first direction X. The third cavity 48 may be formed at the same level in the extending direction of the first cavity 46 and the second cavity 47, between the substrate 42 and the heat sink 30. In one embodiment, the third cavity 48 may be at the same level as the first cavity 46 and the second cavity 47.
[0038] The third cavity 48 may be between the substrates 42 (and the fins 44) adjacent to each other in the first direction X, and may span the insulating sheet 50 between the adjacent substrates 42 (e.g., surrounding the bottom surface of the insulating sheet 50). The width w3 of the third cavity 48 in the first direction X may be greater than the width w1 of the first cavity 46 in the first direction X.
[0039] The insulating sheet 50 may be between the battery cells 20 adjacent to each other in the first direction X. The insulating sheet 50 may extend between (at least a portion of) the thermally conductive blocks 40 adjacent to each other in the first direction X.
[0040] The insulating sheet 50 may extend (in the second direction Y) from between adjacent battery cells 20 to between adjacent thermally conductive blocks 40. In one embodiment, the extending end (e.g., the bottom end) of the insulating sheet 50 may be in the third cavity 48 between the outwardly facing fins 44 of the thermally conductive blocks 40 adjacent to each other in the first direction X.
[0041] The insulating sheet 50 may have a first thickness t1 at a portion between adjacent battery cells 20 (in the first direction X). The insulating sheet 50 may have a second thickness t2 at a portion between the substrates 42 of adjacent thermally conductive blocks 40 (in the first direction X), the second thickness t2 being different from the first thickness t1. In one embodiment, the second thickness t2 may be less than the first thickness t1. In one embodiment, the insulating sheet 50 may be compressed to form or provide a second thickness t2 less than the first thickness t1 between the substrates 42 of adjacent thermally conductive blocks 40.
[0042] The insulating sheet 50 may surround or cover the end-facing corners of the adjacent substrate 42. In one embodiment, the insulating sheet 50 may surround or cover the side surfaces of the substrate 42 of the thermal block 40 and the portions of the top and bottom surfaces adjacent to the side surfaces.
[0043] Hereinafter, the working effects of the present disclosure will be described in detail along a heat transfer path in a battery pack including the above-mentioned components.
[0044] refer to Figure 6, when charging and discharging are repeated in the battery cell 20, heat may be generated or produced in the battery cell 20. The heat in the battery cell 20 may be transferred to the substrate 42 of the heat conductive block 40. The heat transferred to the substrate 42 may be transferred to the heat sink 30 in the second direction Y through the plurality of fins 44. The heat transferred to the heat sink 30 may be quickly conducted and dissipated to the outside in the second direction Y. In this process, the heat transferred to the heat sink 30 should be prevented from being transferred to another adjacent battery cell 20 through the adjacent heat conductive block 40. Due to the structure of the heat conductive block 40, heat transfer from the substrate 42 to the fin 44 may be easily achieved, and heat transfer from the fin 44 to the substrate 42 may not be easily achieved. This may be because the heat may be cooled or dissipated by air due to the presence of the first cavity 46, the second cavity 47, and the third cavity 48 between the fins 44. The heat conductive blocks 40 corresponding to each battery cell 20 may be spaced apart from each other, such as not connected, thereby preventing heat conduction between adjacent heat conductive blocks 40. The insulating sheet 50 may be between adjacent battery cells 20, thereby effectively blocking heat transfer between the battery cells 20 (and between adjacent heat conductive blocks 40). Therefore, heat transfer from the battery cells 20 to the heat sink 30 may be easily and quickly performed, and heat transfer from the heat sink 30 to the battery cells 20 may be reduced or prevented. Therefore, even if any one of the adjacent battery cells 20 is overheated, heat transfer to the adjacent battery cells 20 may be effectively blocked, and the heat may be quickly dissipated to the outside through the heat sink 30, thereby greatly improving the cooling efficiency of the battery pack.
[0045] As described above, according to the present disclosure, the first cavity and the fins of the thermally conductive block (between a plurality of battery cells and a heat sink) may face the battery cells in a second direction different from the first direction, and heat transfer between adjacent battery cells through the thermally conductive block may be blocked, thereby improving cooling performance.
[0046] By way of summary and review, a battery pack may include a plurality of battery modules, and a large amount of heat may be generated during repeated charging and discharging processes in battery cells densely arranged in a small space. The battery pack may have a structure for effectively dissipating and cooling the heat generated or produced in the battery cells accommodated therein.
[0047] In order to reduce the temperature increase due to the heat generated in the battery cells inside the battery pack, the heat generated in the battery cells 1 can be Figure 1 and Figure 2The cooling plate 2 shown in FIG. 1 is installed below the battery cell 1 to dissipate heat to the outside. In this process, the heat generated in the battery cell 1 may be transferred to the cooling plate 2, and the heat is also transferred to the adjacent battery cell 1, which may damage the adjacent battery cell 1. If abnormal heat dissipation (such as thermal runaway) occurs in one battery cell 1, the cooling plate 2 heated to a high temperature may transfer heat to the adjacent battery cell 1, which may damage the adjacent battery cell 1. This problem may occur in a structure in which the heat transfer between the battery cell 1 and the cooling plate 2 is bidirectional.
[0048] According to the present disclosure, since a plurality of battery cells arranged in a first direction are connected to a heat sink to face the first cavity and fins in the thermally conductive block of the battery cells in a second direction, heat transfer between adjacent battery cells through the thermally conductive block can be blocked, thereby improving cooling performance.
[0049] One or more embodiments may provide a battery pack having improved cooling performance by effectively blocking heat transfer between battery cells.
[0050] One or more embodiments may provide a battery pack having improved cooling performance by preventing heat transferred from a battery cell to a heat sink from also being transferred to adjacent battery cells using an improved cooling structure of the battery pack.
[0051] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and interpreted in a general and descriptive sense only and not for purposes of limitation. In some cases, as will be apparent to one of ordinary skill in the art at the time of filing this application, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless specifically indicated otherwise. Accordingly, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the spirit and scope of the present invention as set forth in the claims.
Claims
1. A battery pack, characterized in that: The battery pack comprises: A plurality of battery cells arranged along a first direction; a heat sink facing the plurality of battery cells in a second direction different from the first direction, the heat sink continuously extending along the plurality of battery cells; and A heat conducting block is provided between the heat sink and the plurality of battery cells. The heat conducting blocks each include: a substrate on one side of one of the plurality of battery cells; and The first cavities and the plurality of fins are alternately arranged along the first direction, and the first cavities and the plurality of fins are between the substrate and the heat sink.
2. The battery pack according to claim 1, characterized in that: The plurality of fins are adjacent to each other in the first direction and the first cavity is between the plurality of fins, and The plurality of fins are adjacent to each other in a third direction different from the first direction and the second direction with a second cavity between the plurality of fins.
3. The battery pack according to claim 2, characterized in that: The plurality of fins are arranged along the first direction and the third direction such that a width of the first cavity in the first direction is smaller than a width of the second cavity in the third direction.
4. The battery pack according to claim 3, characterized in that: The battery pack further includes a third cavity between outwardly facing fins of the thermally conductive block adjacent to each other in the first direction.
5. The battery pack according to claim 4, characterized in that: The third cavity is between the adjacent substrate and the heat sink and is at the same level as the first cavity and the second cavity.
6. The battery pack according to claim 4, characterized in that: The battery pack further includes an insulating sheet between the plurality of battery cells adjacent to each other in the first direction, and The insulating sheet at least partially extends between the heat conducting blocks adjacent to each other in the first direction.
7. The battery pack according to claim 6, characterized in that: The insulating sheet is further between adjacent substrates, and in: The third cavity is between adjacent substrates and the heat sink and spans across the insulating sheet between the adjacent substrates, and A width of the third cavity in the first direction is greater than the width of the first cavity in the first direction.
8. The battery pack according to claim 6, characterized in that: The insulating sheet extends from between adjacent battery cells among the plurality of battery cells to between adjacent heat conductive blocks in the second direction, and The extending end of the insulating sheet is in the third cavity between the outwardly facing fins of the heat conducting blocks adjacent to each other in the first direction.
9. The battery pack according to claim 6, characterized in that: The insulating sheet has a first thickness between the plurality of battery cells adjacent to each other in the first direction, and The insulating sheet has a second thickness between the substrates of the thermally conductive blocks adjacent to each other in the first direction, the second thickness being different from the first thickness.
10. The battery pack according to claim 9, characterized in that: The second thickness is smaller than the first thickness.
11. The battery pack according to claim 6, characterized in that: The insulating sheet surrounds side surfaces of the substrates of the heat conductive blocks adjacent to each other and portions of top and bottom surfaces of the substrates adjacent to the side surfaces.