Air-cooled heat dissipation energy storage battery pack

Abstract

The utility model discloses a kind of air-cooled heat dissipation energy storage battery pack, including shell, first electric core module and second electric core module are provided with in shell parallel, central air duct is reserved between first electric core module and second electric core module, the corresponding position of central air duct is equipped with heat dissipation fan on the one end side wall of shell, and the one end of heat dissipation fan on shell is equipped with main air inlet;Multiple first spoiler and multiple second spoiler are equipped in shell, and first spoiler and second spoiler respectively extend into central air duct, the side wall of first electric core module is connected with first spoiler, and the side wall of second electric core module is connected with second spoiler, and first spoiler and second spoiler are distributed in central air duct with dislocation.The utility model simplifies mechanical structure, can reduce production and design cost;And energy storage battery pack's heat dissipation efficiency can be improved by prolonging the contact time of cold air and electric core.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, specifically to an air-cooled energy storage battery pack. Background Technology

[0002] A battery energy storage system is an energy storage system consisting of batteries and parallel voltage-source converters. There are multiple battery modules in a battery energy storage system, and each battery module consists of multiple cells connected in series. The cells will inevitably generate heat during charging and discharging. Therefore, existing battery modules are basically equipped with heat dissipation structures to ensure the safety of cell operation.

[0003] Currently, common heat dissipation methods in energy storage battery packs include: natural heat dissipation, air cooling, liquid cooling, and direct cooling; among these, air cooling is the most commonly used method. Existing single-fan energy storage battery packs with two modules typically employ large-area heat dissipation for the cells, with air intake on the side of the casing and a ventilation plate sandwiched between the cells as a heat dissipation channel. A single fan then draws air out from the central channel between the two modules for cooling. Existing patented technologies such as CN218333968U and CN117525672A can be referenced. This structural approach has the following problems:

[0004] 1. Large-area cooling of battery cells requires leaving a certain gap between the cells and adding ventilation plates in the gap, which increases the number of structural components, increases structural complexity and design cost.

[0005] 2. In existing energy storage battery packs, the central channel between the two modules is mostly a straight-through structure. When the fan is working, the cold air drawn in will quickly pass through each cell, resulting in too short a contact time between the cold air and the cell, leading to poor heat dissipation efficiency. Utility Model Content

[0006] To address some or all of the problems existing in the prior art, this utility model provides an air-cooled energy storage battery pack, including a shell. A first cell module and a second cell module are arranged parallel to each other inside the shell. A central air duct is reserved between the first and second cell modules. A cooling fan is provided on one side wall of the shell at a position corresponding to the central air duct. A main air inlet is provided on the end of the shell away from the cooling fan. Multiple first and second baffles are provided inside the shell. The first and second baffles extend into the central air duct. The first baffles are connected to the side walls of the first cell modules, and the second baffles are connected to the side walls of the second cell modules. The first and second baffles are staggered within the central air duct.

[0007] As a further improvement of this utility model, side air inlets are provided on the left and right side walls of the outer casing, and side air ducts are reserved between the first battery cell module and the second battery cell module and the side walls of the outer casing.

[0008] As a further improvement of this utility model, throttling blocks are respectively provided on the left and right inner sidewalls of the outer shell, and the throttling blocks extend into the side air duct.

[0009] As a further improvement of this utility model, the height of the throttling block extending into the side air duct gradually increases from the side air inlet towards the cooling fan.

[0010] As a further improvement of this utility model, a first isolation plate and a second isolation plate are respectively provided on the left and right inner side walls of the outer shell. The first isolation plate and the second isolation plate are respectively disposed between the main air inlet and the side air inlet. The first isolation plate is connected to the first battery cell module, and the second isolation plate is connected to the second battery cell module.

[0011] As a further improvement of this utility model, the outer shell is provided with an air duct sealing plate, which is sealed and connected to the upper end face of the first battery cell module and the second battery cell module respectively.

[0012] As a further improvement of this utility model, there are two main air inlets, one of which is aligned with the first battery cell module and the other is aligned with the second battery cell module.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention utilizes air intake on the end face of the outer casing, eliminating the need for ventilation plates between the battery cells, thus reducing structural components, simplifying the mechanical structure, and lowering production and design costs. Furthermore, by incorporating a first and second baffle plate within the outer casing, and by staggering these baffle plates within the central air duct, the contact time between the cool air and the battery cells can be extended, effectively improving the heat dissipation efficiency of the energy storage battery pack. Attached Figure Description

[0015] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external structure of an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this utility model;

[0018] Figure 3 This is an exploded structural diagram of an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the measured temperature distribution of the battery cell module under the working state of this utility model embodiment. Detailed Implementation

[0020] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0021] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figure 1-3As shown, a wind-cooled energy storage battery pack includes a housing 1. A first cell module 2 and a second cell module 3 are arranged in parallel inside the housing 1. Each cell module 2 and cell module 3 is composed of multiple stacked cells. A central air duct 4 is provided between the first cell module 2 and the second cell module 3. A cooling fan 5 is fixedly installed on one side wall of the housing 1, positioned corresponding to the central air duct 4. A main air inlet 6 is located on the end of the housing 1 away from the cooling fan 5. During operation, the cooling fan 5 draws air from inside the housing 1, creating a negative pressure inside. External air then flows into the housing 1 through the main air inlet 6, then through the central air duct 4, contacting the cells of the first cell module 2 and the second cell module 3, carrying away the heat generated by the cells. The air then flows out of the housing 1 from the cooling fan 5, thus achieving the purpose of cooling the first cell module 2 and the second cell module 3. This air-cooled energy storage battery pack uses air intake on one end of the outer casing, eliminating the need for ventilation plates between the cells. This reduces structural components, simplifies the mechanical structure of the battery pack, and lowers the production and design costs.

[0024] The outer casing 1 contains multiple first baffles 7 and multiple second baffles 8. The first baffles 7 and second baffles 8 extend into the central air duct 4. The first baffles 7 are connected to the side wall of the first battery cell module 2, and the second baffles 8 are connected to the side wall of the second battery cell module 3. The first baffles 7 and second baffles 8 are staggered within the central air duct 4. When the cooling fan 5 operates, air flows within the central air duct 4. The flowing air is blocked by the first baffles 7 and second baffles 8, allowing the cool air to make more thorough contact with the battery cells, prolonging the contact time between the cool air and the battery cells, and enabling the cool air to carry away as much heat generated by the battery cells as possible, thereby improving heat dissipation efficiency.

[0025] In this embodiment, the first spoiler 7 and the second spoiler 8 are respectively welded to the inner sidewall of the outer shell 1. In other embodiments, the first spoiler 7 and the second spoiler 8 can also be sealed and fixedly connected to the outer shell 1 by other fixing methods such as adhesive bonding.

[0026] In this embodiment, there are two main air inlets 6. One main air inlet 6 is aligned with the first battery cell module 2, and the other main air inlet 6 is aligned with the second battery cell module 3. By setting two main air inlets 6, the total amount of air entering the housing 1 when the cooling fan 5 is working can be increased. Aligning the main air inlets 6 with the battery cell modules can dissipate heat from the end faces of the battery cell modules, thereby improving the heat dissipation efficiency.

[0027] Side air inlets 9 are provided on the left and right side walls of the outer casing 1, and side air ducts 10 are reserved between the first battery cell module 2 and the second battery cell module 3 and the side walls of the outer casing 1. By providing side air inlets 9 on both sides of the outer casing 1, the total amount of air flowing into the outer casing 1 can be increased, thereby improving heat dissipation efficiency. The side air ducts 10 reserved between the battery cell module and the outer casing 1 allow air to flow within the side air ducts 10. The air flowing within the side air ducts 10 can carry away the heat generated by the battery cell during operation, thereby dissipating heat from the sides of the battery cell and improving heat dissipation efficiency.

[0028] To further improve heat dissipation efficiency, throttling blocks 11 are respectively provided on the left and right inner sidewalls of the outer casing 1, extending into the side air duct 10. Moreover, the throttling blocks 11 have a wedge-shaped structure, and the height of the throttling blocks 11 extending into the side air duct 10 gradually increases from the side air inlet 9 towards the cooling fan 5. When air flows in the side air duct 10, the throttling blocks 11 can reduce the air flow area, thereby increasing the air flow velocity, allowing the air to flow fully over the side of the battery cell, increasing the heat exchange capacity, and further improving heat dissipation efficiency.

[0029] The left and right inner walls of the outer casing 1 are respectively provided with a first isolation plate 12 and a second isolation plate 13. The first isolation plate 12 and the second isolation plate 13 are respectively located between the main air inlet 6 and the side air inlet 9. The first isolation plate 12 is connected to the first battery cell module 2, and the second isolation plate 13 is connected to the second battery cell module 3. The first isolation plate 12 and the second isolation plate 13 can separate the side air duct and the central air duct 4 from each other, avoid the air flowing into the side air inlet 9 and the main air inlet 6 from affecting each other, reduce the possibility of turbulence inside the outer casing 1, and allow the cold air to circulate smoothly inside the outer casing 1, thereby improving the heat dissipation efficiency.

[0030] An air duct sealing plate 14 is provided inside the outer casing 1. The air duct sealing plate 14 is sealed and connected to the upper end face of the first battery cell module 2 and the second battery cell module 3 respectively, and the air duct sealing plate 14 is connected to the inner side wall of the outer casing 1. The air duct sealing plate 14 isolates the central air duct 4 and the side air duct 10 from each other, reduces the crossflow between the two air ducts, improves the airflow in the outer casing 1, and thus improves the heat dissipation efficiency.

[0031] This air-cooled energy storage battery pack eliminates the need for additional structural supports between the cells, reducing material usage, simplifying the structure, and saving costs. It employs a rear-entry air intake design, with throttling blocks 11 on both sides of the outer casing 1 and a baffle plate in the central air duct 4. Figure 4 As shown, in actual operation, CFD simulation tools were used to calculate that under 0.5P conditions and an ambient temperature of 25℃, the steady-state temperature difference of the cells was 3.1℃, achieving the effect of uniform temperature for each cell. The highest temperature was 37.9℃, which met the design requirements of the air-cooled battery pack.

[0032] The above-described specific embodiments are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A wind-cooled heat dissipation energy storage battery pack, characterized in that: The device includes an outer casing, inside which a first battery cell module and a second battery cell module are arranged in parallel. A central air duct is reserved between the first battery cell module and the second battery cell module. A cooling fan is provided on one side wall of the outer casing at a position corresponding to the central air duct. A main air inlet is provided on the outer casing at the end away from the cooling fan. The housing is provided with a plurality of first spoilers and a plurality of second spoilers. The first spoilers and the second spoilers extend into the central air duct. The first spoilers are connected to the side wall of the first battery cell module, and the second spoilers are connected to the side wall of the second battery cell module. The first spoilers and the second spoilers are staggered and distributed in the central air duct.

2. The air-cooled heat dissipation energy storage battery pack according to claim 1, characterized in that: Side air inlets are provided on the left and right side walls of the housing, and side air ducts are reserved between the first battery cell module and the second battery cell module and the side walls of the housing.

3. The air-cooled heat dissipation energy storage battery pack according to claim 2, characterized in that: Throttling blocks are provided on the left and right inner sidewalls of the outer casing, and the throttling blocks extend into the side air duct.

4. The air-cooled heat dissipation energy storage battery pack according to claim 3, characterized in that: The height at which the throttling block extends into the side air duct gradually increases from the side air inlet toward the cooling fan.

5. The air-cooled heat dissipation energy storage battery pack according to claim 2, characterized in that: The outer casing has a first isolation plate and a second isolation plate on its left and right inner side walls, respectively. The first isolation plate and the second isolation plate are respectively disposed between the main air inlet and the side air inlet. The first isolation plate is connected to the first battery cell module, and the second isolation plate is connected to the second battery cell module.

6. The air-cooled heat dissipation energy storage battery pack according to claim 1, characterized in that: The housing is equipped with an air duct sealing plate, which is sealed to the upper end face of the first battery cell module and the second battery cell module respectively.

7. The air-cooled heat dissipation energy storage battery pack according to claim 1, characterized in that: There are two main air inlets, one of which is aligned with the first battery cell module and the other is aligned with the second battery cell module.

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