Phase change heat dissipation battery box body structure
By combining a U-shaped separator and a thermally conductive silicone layer inside the battery box, a rapid heat dissipation network is formed, which solves the problem of high space and airtightness requirements for battery module cooling methods, achieves rapid heat dissipation and low-cost maintenance, and extends the service life of individual battery cells.
Patent Information
- Application Number
- CN202422762791.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Existing battery module cooling methods have high requirements for structural space and airtightness, high maintenance costs, and limited application of air cooling.
The battery housing structure adopts phase change heat dissipation. By setting the first and second U-shaped separators and the thermally conductive silicone layer, a rapid heat dissipation network is formed to achieve rapid heat dissipation of module units and individual cells.
The compact design enables rapid heat dissipation, reduces maintenance costs, and improves the lifespan and safety of individual battery cells. The structure is also simple and easy to maintain.
Smart Images
Figure CN223501974U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of battery technology, and in particular relates to a battery housing structure for phase change heat dissipation. Background Technology
[0002] With the in-depth development of new energy industries such as energy storage, photovoltaics, and wind power, various new energy sources are integrating to form complementary energy stations. Complementary energy stations generally include wind power-storage power stations, photovoltaic power-storage power stations, and wind-solar-storage power stations.
[0003] With the vigorous development of new energy sources, the current of various new energy products is increasing, and the performance requirements for these products are also becoming more stringent. Currently, the existing battery structures on the market generally employ air cooling and liquid cooling methods. Conventional liquid cooling methods have high requirements for product space and airtightness, resulting in higher overall costs. Furthermore, the maintenance of liquid cooling units is relatively complicated, requiring a large space for installation and incurring high maintenance costs. Air cooling requires air ducts within the module to effectively cool the battery module, placing high demands on the module's spatial dimensions. The module structure must have fixed air ducts and be able to generate effective air convection to achieve effective cooling, thus limiting its application. Utility Model Content
[0004] The purpose of this utility model is to provide a battery box structure with phase change heat dissipation, so as to solve the technical problems of high requirements for structural space and airtightness and high maintenance costs of existing battery module cooling methods.
[0005] To achieve the above objectives, this utility model provides a battery housing structure for phase change heat dissipation, including a cover plate, a housing, and a cell module; the cell module is disposed inside the housing, and the cover plate covers the top of the housing; the cell module includes multiple module units arranged in parallel, and a first U-shaped partition is disposed between adjacent module units, the first U-shaped partition abutting against the module unit and the housing respectively; the first U-shaped partition includes a first U-shaped mica sheet and a first phase change heat sink disposed in abutting position, the first U-shaped mica sheet being circumferentially disposed on the outside of the first phase change heat sink.
[0006] In a preferred embodiment, the length of the first square-shaped mica sheet is the same as the length of the module unit, and the height of the first square-shaped mica sheet is the same as the height of the module unit.
[0007] In a preferred embodiment, each module unit includes several parallel battery cells; in the same module unit, a second U-shaped spacer is provided between adjacent battery cells.
[0008] In a preferred embodiment, each of the second U-shaped spacers is disposed in contact with the adjacent first U-shaped spacer; each of the second U-shaped spacers is disposed in contact with the adjacent battery cell.
[0009] In a preferred embodiment, the length of the second U-shaped separator is the same as the length of the battery cell, and the height of the second U-shaped separator is the same as the height of the battery cell.
[0010] In a preferred embodiment, the second U-shaped partition includes a second U-shaped mica sheet and a second phase change heat sink that are disposed in contact with each other, wherein the second U-shaped mica sheet is circumferentially disposed on the outer side of the second phase change heat sink.
[0011] In a preferred embodiment, a thermally conductive silicone layer is provided between the housing and the bottom surface of the battery cell module. The thermally conductive silicone layer is sleeved on the bottom of the battery cell module, and the thermally conductive silicone layer is respectively abutted against the bottom surface of the battery cell module and the bottom surface of the housing.
[0012] In a preferred embodiment, the thermally conductive silicone layer is respectively disposed in contact with each of the first U-shaped partitions and each of the second U-shaped partitions.
[0013] In a preferred embodiment, a top cover fixing frame is provided between the battery cell module and the cover plate. The top cover fixing frame is located at the top of the battery cell module and is fixedly connected to the housing. The cover plate is closed on the top cover fixing frame.
[0014] In a preferred embodiment, the top cover fixing frame is adapted to the end face of the top of the battery cell module; a gap is provided between the cover plate and the top cover fixing frame.
[0015] In a preferred embodiment, the phase change heat dissipation battery housing structure further includes a first fixing strap and a second fixing strap, wherein the first fixing strap is sleeved on the upper part of the housing and the second fixing strap is sleeved on the lower part of the housing.
[0016] The technical solution proposed in this utility model has the following beneficial effects: By setting a first U-shaped separator and a second U-shaped separator, the heat generated by the individual battery cells and module units can be quickly dissipated to the thermally conductive silicone layer and the housing (aluminum alloy housing), achieving rapid heat dissipation. By having the first and second U-shaped separators abut against the thermally conductive silicone layer, the entire battery housing structure forms a good heat dissipation network, which can effectively dissipate heat from each individual battery cell (especially those in the middle of the module unit), resulting in fast and effective heat dissipation. In situations where the module space is compact and there is no effective airflow, this application combines a phase change heat sink with a thermally conductive silicone layer (2mm thick, with a thermal conductivity of 1.5W), enabling the individual battery cells (especially those in the middle of the module) to cool down rapidly, thereby effectively extending the service life of the individual battery cells. This utility model has a simple structure, good heat dissipation effect, is easy to disassemble and assemble, convenient to maintain, has good stability, is economical, safe, and practical, and can well meet the needs of actual use. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a phase change heat dissipation battery box structure according to an embodiment of the present invention.
[0018] Figure 2 for Figure 1 A partial structural diagram of the battery housing structure for phase change heat dissipation;
[0019] Figure 3 for Figure 2 A partial structural diagram of the battery housing structure for phase change heat dissipation;
[0020] Figure 4 for Figure 3 A schematic diagram of the heat dissipation network structure formed by the first U-shaped separator, the second U-shaped separator, and the thermally conductive silicone layer in the phase change heat dissipation battery housing structure;
[0021] Figure 5 for Figure 2 An exploded view of the battery housing structure for phase change heat dissipation. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0025] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.
[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0027] like Figures 1 to 5 As shown, this utility model embodiment provides a battery box structure for phase change heat dissipation, including a cover plate 10, a box body 20, and a cell module 30; the cell module 30 is disposed inside the box body 20, and the cover plate 10 covers the top of the box body 20; the cell module 30 includes a plurality of module units 31 arranged in parallel, and a first U-shaped partition 40 is disposed between adjacent module units 31, the first U-shaped partition 40 abutting against the module unit 31 and the box body 20 respectively; the first U-shaped partition 40 includes a first U-shaped mica sheet 41 and a first phase change heat sink 42 abutting against each other, the first U-shaped mica sheet 41 being circumferentially disposed on the outside of the first phase change heat sink 42.
[0028] In a preferred embodiment, the length of the first U-shaped mica sheet 41 is the same as the length of the module unit 31, and the height of the first U-shaped mica sheet 41 is the same as the height of the module unit 31. This effectively ensures insulation while also enabling rapid cooling of the module unit 31. The U-shaped mica sheet serves as insulation; when the temperature of the module unit reaches 37°C during discharge, the phase change heat sink begins to absorb heat from the module unit, slowing down the temperature rise during high-rate discharge and keeping the module unit temperature below 50°C.
[0029] In a preferred embodiment, each module unit 31 includes several parallel battery cells 311; within the same module unit 31, a second U-shaped spacer 50 is provided between adjacent battery cells 311. The outer shell of the battery cell 311 is made of plastic, which provides good insulation and is safe and reliable.
[0030] In a preferred embodiment, each of the second U-shaped spacers 50 is disposed in contact with the adjacent first U-shaped spacer 40; each of the second U-shaped spacers 50 is disposed in contact with the adjacent battery cell 311. In this way, insulation can be effectively guaranteed, and rapid cooling of the battery cell 311 (especially the battery cell located in the middle of the module) can be further guaranteed.
[0031] In a preferred embodiment, the length of the second U-shaped spacer 50 is the same as the length of the battery cell 311, and the height of the second U-shaped spacer 50 is the same as the height of the battery cell 311. This effectively ensures insulation while also enabling rapid cooling of the battery cell 311.
[0032] As a preferred embodiment, such as Figure 4 As shown, the second U-shaped spacer 50 includes a second U-shaped mica sheet 51 and a second phase change heat sink 52 that are disposed in contact with each other. The second U-shaped mica sheet 51 is circumferentially disposed on the outer side of the second phase change heat sink 52. The U-shaped mica sheet serves as insulation; when the temperature of a single cell reaches 37°C during discharge, the phase change heat sink begins to absorb heat from the single cell, slowing down the temperature rise of the single cell during high-rate discharge and keeping the temperature of the single cell below 50°C.
[0033] In a preferred embodiment, a thermally conductive silicone layer 60 is provided between the bottom surface of the housing 20 and the bottom surface of the battery cell module 30. The thermally conductive silicone layer 60 is sleeved on the bottom of the battery cell module 30 and is respectively abutted against the bottom surface of the battery cell module 30 and the bottom surface of the housing 20.
[0034] In a preferred embodiment, the thermally conductive silicone layer 60 is respectively disposed in contact with each of the first U-shaped spacers 40 and each of the second U-shaped spacers 50. This arrangement enables the entire battery box structure to form a good heat dissipation network, which can effectively dissipate heat from each individual battery cell 311 (especially the individual battery cells in the middle of the module unit), resulting in fast heat dissipation and good heat dissipation effect.
[0035] In situations where the module space is compact and no effective airflow is formed, the heat generated by the individual battery cells 311 and the module unit 31 can be quickly dissipated to the thermally conductive silicone layer 60 and the housing 20 through the first U-shaped partition 40 and the second U-shaped partition 50. The heat is then quickly transferred to the bottom of the housing 20 through the thermally conductive silicone layer 60, thereby achieving rapid heat dissipation. In other words, this application can achieve rapid heat dissipation of individual battery cells and module units without forming an airflow, enabling individual battery cells (especially those located in the middle of the module) to cool down quickly, thereby effectively extending the service life of individual battery cells.
[0036] In a preferred embodiment, a top cover fixing frame 70 is provided between the battery cell module 30 and the cover plate 10. The top cover fixing frame 70 is located at the top of the battery cell module 30 and is fixedly connected to the housing 20. The cover plate 10 is covered by the top cover fixing frame 70.
[0037] In a preferred embodiment, the top cover fixing bracket 70 is adapted to the end face of the top of the battery cell module 30; a gap is provided between the cover plate 10 and the top cover fixing bracket 70. By providing a gap, the heat at the top of the battery cell module 30 can be dissipated through the gap, further ensuring the heat dissipation effect.
[0038] In a preferred embodiment, the phase-change heat dissipation battery housing structure further includes a first fixing strap 80 and a second fixing strap 90. The first fixing strap 80 is fitted onto the upper part of the housing 20, and the second fixing strap 90 is fitted onto the lower part of the housing 20. In this application, the first fixing strap 80 abuts against the top cover fixing frame 70, which effectively secures the battery cell module while reducing the internal space occupied by the securing mechanism.
[0039] This application effectively secures the battery cell module 30 using a first fixing strap 80, a top cover fixing bracket 70, and a second fixing strap 90. This effectively reduces the internal space occupied by the securing mechanism, thereby reducing the overall size of the battery pack for the same capacity. It also ensures the consistency of the module units during high-rate discharge. The structure of this application allows for upright placement, matching the structure of the individual battery cells and avoiding the risk of short circuits due to leakage.
[0040] In the structure of this application, the first fixing strap 80 and the second fixing strap 90 are disposed on the outside of the housing 20, rather than on the outside of the cell module 30, which can effectively reduce the internal space occupied by fastening, and also effectively ensure the consistency of the module units during high-rate discharge.
[0041] The top cover mounting bracket 70 effectively secures the battery cell module while facilitating the series and parallel connection between module units 31 in the battery cell module 30. This further reduces the internal space occupied by fastening and series and parallel connection, and also effectively ensures the consistency of module units during high-rate discharge.
[0042] This application, by setting a first U-shaped partition and a second U-shaped partition, enables the heat of the individual battery cells to be quickly transferred to the housing (aluminum alloy housing), thereby achieving the purpose of rapid and effective cooling of the battery cell module, which can well meet the needs of actual use.
[0043] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A battery housing structure for phase change heat dissipation, characterized in that, The device includes a cover plate, a housing, and a battery cell module. The battery cell module is disposed inside the housing, and the cover plate covers the top of the housing. The battery cell module includes multiple module units arranged in parallel, and a first U-shaped partition is provided between adjacent module units. The first U-shaped partition abuts against the module unit and the housing respectively. The first U-shaped partition includes a first U-shaped mica sheet and a first phase change heat sink that abut against each other. The first U-shaped mica sheet is circumferentially disposed on the outside of the first phase change heat sink.
2. The battery housing structure for phase change heat dissipation according to claim 1, characterized in that, The length of the first square-shaped mica sheet is the same as the length of the module unit, and the height of the first square-shaped mica sheet is the same as the height of the module unit.
3. The battery housing structure for phase change heat dissipation according to claim 1, characterized in that, Each module unit includes several parallel battery cells; within the same module unit, a second U-shaped spacer is provided between adjacent battery cells.
4. The battery housing structure for phase change heat dissipation according to claim 3, characterized in that, Each of the second U-shaped spacers is disposed in contact with the adjacent first U-shaped spacer; each of the second U-shaped spacers is disposed in contact with the adjacent battery cell.
5. The battery housing structure for phase change heat dissipation according to claim 3, characterized in that, The length of the second U-shaped separator is the same as the length of the battery cell, and the height of the second U-shaped separator is the same as the height of the battery cell.
6. The battery housing structure for phase change heat dissipation according to claim 3, characterized in that, The second U-shaped partition includes a second U-shaped mica sheet and a second phase change heat sink that are abutted together, with the second U-shaped mica sheet circumferentially disposed on the outer side of the second phase change heat sink.
7. The battery housing structure for phase change heat dissipation according to claim 3, characterized in that, A thermally conductive silicone layer is provided between the housing and the bottom surface of the battery cell module. The thermally conductive silicone layer is sleeved on the bottom of the battery cell module and abuts against the bottom surface of the battery cell module and the bottom surface of the housing, respectively.
8. The battery housing structure for phase change heat dissipation according to claim 7, characterized in that, The thermally conductive silicone layer is respectively abutted against each of the first and second square-shaped partitions.
9. The battery housing structure for phase change heat dissipation according to claim 1, characterized in that, A top cover fixing frame is provided between the battery cell module and the cover plate. The top cover fixing frame is located at the top of the battery cell module and is fixedly connected to the housing. The cover plate is closed on the top cover fixing frame. The top cover fixing frame is adapted to the end face of the top of the battery cell module; a gap is provided between the cover plate and the top cover fixing frame.
10. The battery housing structure for phase change heat dissipation according to claim 1, characterized in that, The phase change heat dissipation battery housing structure further includes a first fixing strap and a second fixing strap, wherein the first fixing strap is sleeved on the upper part of the housing and the second fixing strap is sleeved on the lower part of the housing.