A temperature control system for a blade lithium battery

Abstract

The utility model discloses a kind of blade lithium battery temperature control system, including equipment cabinet and partial equipment, further including battery tray, its bottom partial openwork, for carrying battery pack;Heat dissipation component, symmetrically set in equipment cabinet side wall, heat dissipation component includes heat exchanger, circulating air duct and refrigerant circulating fan, heat exchanger is located at heat dissipation component bottom, refrigerant circulating fan is located at heat dissipation component top, and heat exchanger and refrigerant circulating fan are communicated by circulating air duct;Uniform temperature fan, set in battery pack directly above;The utility model passes through the synergic effect of heat dissipation component and uniform temperature fan, the heat generated by partial equipment is quickly converted into cold air and reintroduced into equipment cabinet, then by uniform temperature fan even blows to battery pack, forms efficient internal circulation, ensure that battery pack temperature distribution is even, avoid local overheating or supercooling, improve battery partial equipment precision and consistency.

Description

Technical Field

[0001] This utility model relates to the field of blade battery temperature control technology, specifically to a blade lithium battery temperature control system. Background Technology

[0002] As its name suggests, the blade battery is a lithium battery with a very large aspect ratio; its length is ten to even dozens of times its width and thickness. The production process of blade batteries typically involves fixing the cells in a tray, allowing for the simultaneous charging and discharging of a large number of batteries in one operation to achieve the formation and capacity testing process. Due to the large number of batteries produced in a single process, the capacity of the batteries after the formation process will vary within a certain range due to temperature variations. Therefore, controlling the temperature uniformity of the batteries during blade battery production is a major challenge.

[0003] The capacity grading process is affected by both ambient temperature and the battery's own temperature. This step requires ensuring the temperature rise of the battery storage area and the uniform temperature of the batteries, thereby guaranteeing the consistency of performance within the same batch of batteries. The quality of the capacity grading process directly affects the subsequent battery classification and yield rate. In actual production, due to limitations in area, ceiling height, and layout, the temperature uniformity of the capacity grading workshop environment is often affected by the ambient temperature ventilation system and the battery capacity grading process, resulting in excessive temperature differences among the equipment within the workshop. Therefore, this application proposes a blade lithium battery temperature control system. Utility Model Content

[0004] To overcome the above-mentioned technical defects, this utility model provides a blade lithium battery temperature control system, which uses an internal circulation method in the air duct of a single storage unit to ensure that the heat generated inside the equipment cabinet is not discharged externally, but is absorbed by the internal circulation, thereby achieving uniform temperature control inside the storage unit to meet production needs.

[0005] To solve the above problems, this utility model is implemented according to the following technical solution:

[0006] This utility model discloses a blade lithium battery temperature control system, including an equipment cabinet and a capacity grading device, wherein the capacity grading device is centrally located inside the equipment cabinet, and further includes:

[0007] The battery tray has a partially open bottom to support the battery pack.

[0008] The heat dissipation components are symmetrically arranged on the side wall of the equipment cabinet. The heat dissipation components include a heat exchanger, a circulating air duct, and a refrigerant circulating fan. The heat exchanger is located at the bottom of the heat dissipation components, and the refrigerant circulating fan is located at the top of the heat dissipation components. The heat exchanger and the refrigerant circulating fan are connected by the circulating air duct. The heat generated by the capacity-distributing equipment is drawn into the heat dissipation components for cooling and then forms cold air that re-enters the equipment cabinet.

[0009] A temperature equalization fan is located directly above the battery pack. The temperature equalization fan blows the cold air toward the battery pack and the capacity grading equipment. The heat dissipation gaps of the individual cells in the battery pack and the partially hollowed-out battery tray form an air duct that runs vertically through the pack.

[0010] Furthermore, the equipment cabinet has a central frame, and the temperature equalization fan is fixed at the top of the central frame. Below the temperature equalization fan, the battery tray carrying the battery pack and the capacity equalization device are arranged sequentially from top to bottom on the central frame.

[0011] Furthermore, the heat exchanger and the refrigerant circulating fan form an exhaust mechanism, drawing the heat generated by the capacity distribution equipment into the heat dissipation component. After being cooled by the heat exchanger, the air becomes cold air, which is then guided by the circulating air duct and blown back into the equipment cabinet by the refrigerant circulating fan. Subsequently, the temperature equalization fan blows the air onto the battery pack to achieve temperature equalization of the battery pack.

[0012] Furthermore, the heat exchanger is provided with a fluid inlet and a fluid outlet. The cold medium flows in from the fluid inlet and flows out from the fluid outlet. The heat passing through the heat exchanger is transferred to the cold medium and discharged along with the outflow of the cold medium, thereby dissipating the heat inside the storage space.

[0013] Furthermore, an on / off valve for controlling the opening and closing of the refrigerant is installed at the fluid inlet.

[0014] Furthermore, in the equipment cabinet, the horizontal height of the temperature equalization fan in the central frame is lower than the horizontal height of the refrigerant circulation fan in the heat dissipation assembly.

[0015] Furthermore, above the temperature equalization fan, there is a duct baffle that separates the air duct. One end of the duct baffle is connected to the equipment cabinet, and the other end is connected to the middle frame.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This application provides a blade lithium battery temperature control system. Through the synergistic action of a heat dissipation component and a temperature-equalizing fan, the heat generated by the capacity grading equipment is rapidly converted into cold air and reintroduced into the equipment cabinet. The temperature-equalizing fan then evenly blows the air onto the battery pack and the capacity grading equipment. The heat dissipation gaps between individual cells in the battery pack and the partially perforated battery tray form a vertically penetrating airflow channel. Cold air is blown into this channel and carries away the heat from the battery pack and capacity grading equipment to the bottom of the equipment cabinet, where it is then drawn back into the heat dissipation component. This creates an internal circulation system, ensuring uniform temperature distribution within the battery pack, preventing localized overheating or undercooling, and improving the accuracy and consistency of battery capacity grading. This application optimizes the internal space of the equipment cabinet by using a single-slot internal airflow circulation method. The heat generated inside the equipment cabinet is not exhausted externally; all heat is absorbed through internal circulation. Because the equipment cabinet does not exhaust heat into the workshop, it reduces energy consumption for temperature control and improves temperature uniformity, achieving energy-saving and emission-reducing green manufacturing effects. Attached Figure Description

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the overall structure of a blade lithium battery temperature control system proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of a blade lithium battery temperature control system proposed in this utility model;

[0021] Figure 3 This is a side view of a blade lithium battery temperature control system proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the battery pack and its tray of a blade lithium battery temperature control system proposed in this utility model.

[0023] Figure 5 This is a bottom view of the tray of a blade lithium battery temperature control system proposed in this utility model;

[0024] Figure 6 This is a schematic diagram of the airflow direction of a blade lithium battery temperature control system proposed in this utility model;

[0025] Figure 7 This is a schematic diagram of a double-layer battery cabinet for a blade lithium battery temperature control system proposed in this utility model;

[0026] Figure 8 This is a schematic diagram of a multi-layer battery cabinet for a blade lithium battery temperature control system proposed in this utility model.

[0027] In the picture:

[0028] 1-Equipment cabinet; 2-Capacity distribution equipment; 3-Battery pack; 4-Central frame; 5-Heat dissipation components; 6-Equalizing fan; 7-Battery tray; 8-Heat exchanger; 9-Circulating air duct; 10-Refrigerant circulating fan; 11-Air duct baffle. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] The detailed features and advantages of this utility model are described below in the embodiments. This content is sufficient to enable anyone skilled in the art to understand the technical content of this utility model and implement it accordingly. Furthermore, based on the disclosure, claims, and drawings in this specification, anyone skilled in the art can easily understand the related objectives and advantages of this utility model. The following embodiments are further detailed in illustrating the viewpoints of this utility model, but are not intended to limit the scope of this utility model in any way.

[0031] Furthermore, embodiments of this utility model will be disclosed below with reference to the accompanying drawings. For the purpose of neatness, some conventional structures and components may be shown in a simple schematic manner in the drawings, and some features in the drawings may be slightly enlarged or their scale or size changed to facilitate understanding and viewing of the technical features of this utility model. However, this is not intended to limit this utility model. In addition, coordinate axes are provided in the drawings to facilitate understanding the relative positional relationships and directions of operation of the components.

[0032] It should be understood that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0034] Additionally, the terms "end," "section," "part," "area," and "location" may be used below to describe specific elements and structures or specific technical features thereon or therebetween, but these elements and structures are not limited by these terms. The term "and / or" may also be used below, referring to a combination that includes one or more of the listed related elements or structures. Furthermore, the terms "substantially," "basically," "about," or "approximately" may be used below, and when used in conjunction with ranges of dimensions, concentrations, temperatures, or other physical or chemical properties or characteristics, they are intended to cover deviations that may exist within the upper and / or lower limits of the range of such properties or characteristics, or to indicate acceptable deviations caused by manufacturing tolerances or analytical processes, while still achieving the intended effect.

[0035] Furthermore, unless otherwise defined, all words or terms used herein, including technical and scientific terms, have their ordinary meanings that can be understood by those skilled in the art. In other words, the definitions of the above-mentioned words or terms should be interpreted in this specification as having the same meaning as those in the relevant technical field of this invention. Unless specifically defined, these words or terms will not be interpreted as having overly idealized or formal meanings.

[0036] like Figures 1 to 8 As shown, this is the preferred structure of the present invention.

[0037] This embodiment discloses a blade lithium battery temperature control system, including an equipment cabinet 1 and a capacity testing device 2, wherein the capacity testing device 2 is centrally located inside the equipment cabinet 1, and further includes:

[0038] The battery tray 7 has a partially hollowed-out bottom to support the battery pack 3;

[0039] Heat dissipation components 5 are symmetrically arranged on the side wall of equipment cabinet 1. The heat dissipation components 5 include heat exchangers 8, circulating air ducts 9, and refrigerant circulating fans 10. The heat exchangers 8 are located at the bottom of the heat dissipation components 5, and the refrigerant circulating fans 10 are located at the top of the heat dissipation components 5. The heat exchangers 8 and the refrigerant circulating fans 10 are connected by the circulating air ducts 9. The heat generated by the capacity distribution equipment 2 is drawn into the heat dissipation components 5 for cooling and then forms cold air that re-enters the equipment cabinet 1.

[0040] A temperature equalization fan 6 is located directly above the battery pack 3. The temperature equalization fan 6 blows the cold air toward the battery pack 3 and the capacity grading device 2. The heat dissipation gap of the individual cells in the battery pack 3 and the partially hollowed-out battery tray 7 form an air duct that runs vertically through the battery pack.

[0041] Cold air is blown into the vertically penetrating air duct and carries away the heat from the battery pack 3 and the capacity testing device 2 to the bottom of the equipment cabinet 1, where it is drawn back into the heat dissipation component 5, thus forming an internal circulation in the air duct of the temperature control system.

[0042] This embodiment provides a blade lithium battery temperature control system. Through the synergistic action of the heat dissipation component 5 and the temperature equalization fan 6, the heat generated by the capacity grading device 2 is quickly converted into cold air and reintroduced into the equipment cabinet 1. The temperature equalization fan 6 then blows the air evenly onto the battery pack 3, forming an efficient internal circulation. This ensures uniform temperature distribution in the battery pack 3, avoids localized overheating or undercooling, and improves the accuracy and consistency of battery capacity grading. This embodiment optimizes the internal space of the equipment cabinet 1. By using a single-cabinet air duct internal circulation method, the heat generated inside the equipment cabinet 1 is not discharged externally; all the heat generated is absorbed through internal circulation. Since the equipment cabinet 1 does not discharge heat into the workshop, it reduces the energy consumption for temperature control in the workshop and better achieves temperature uniformity, thus achieving the green manufacturing effect of energy saving and emission reduction.

[0043] like Figure 2 As shown, the heat dissipation component 5 includes:

[0044] Heat exchanger 8 is located at the bottom of heat dissipation assembly 5 to cool the heat generated by the volume distribution device 2 and form cold air;

[0045] Circulating air duct 9, the path for exhausting cold air;

[0046] The refrigerant circulating fan 10 is located at the top of the heat dissipation component 5, and its airflow direction is from the inside of the heat dissipation component 5 to the inside of the equipment cabinet 1.

[0047] The core function of the heat dissipation component 5 in this example is:

[0048] Heat absorption and conversion: The heat generated by the split-capacity device 2 is absorbed by the heat exchanger 8 and carried away by the refrigerant (such as cooling water or refrigerant), thereby converting hot air into cold air.

[0049] Directional airflow circulation: The circulating air duct 9 guides the flow of cold air, ensuring that the airflow enters the equipment cabinet 1 in an orderly manner, avoiding turbulence or heat accumulation.

[0050] Forced convection cooling: The refrigerant circulation fan 10 is located at the top, forming a top-down airflow circulation, which enhances heat dissipation efficiency and ensures uniform temperature distribution.

[0051] like Figure 2 , Figure 3As shown, this embodiment is provided with two sets of heat dissipation components 5, which are symmetrically arranged on the side wall of the equipment cabinet 1. In order to ensure the ambient temperature of the secondary batteries in the charging and discharging compartment in the area covered by the battery tray 7, water-cooled heat exchangers 8 are set on both sides of the bottom of the heat dissipation components 5. A refrigerant circulation fan 10 is set above the heat dissipation components 5 to input the cold air passing through the heat exchanger 8 into the compartment. The heat exchanger 8 and the refrigerant circulation fan 10 are connected by a sealed air duct to form two independent air ducts for system heat exchange.

[0052] Among them, the heat exchanger 8 is located at the bottom of the heat dissipation component 5, and the heat rises naturally, which can efficiently capture the high-temperature airflow and improve the cooling efficiency; the circulating air duct 9 guides the airflow, optimizes the airflow path to avoid the mixing of hot and cold air, and ensures that cold air directly enters the equipment cabinet 1, reducing ineffective circulation and improving energy efficiency; the overall heat dissipation component 5 is installed independently, which is convenient for maintenance or replacement of refrigerant pipelines and does not affect the overall air duct structure.

[0053] In addition, to ensure smooth airflow, such as Figure 4 , Figure 5 As shown, the heat dissipation gaps between individual cells in the battery pack 3 and the partially perforated battery tray 7 form a vertically penetrating airflow channel, enabling the temperature control system's airflow channel to form an internal circulation. The heat dissipation gaps between individual cells and the perforated battery tray 7 together constitute a vertically penetrating airflow channel, forming a complete closed-loop airflow channel. This ensures that cold air can smoothly and evenly pass through each cell from top to bottom, eliminating airflow dead zones and allowing the airflow to directly contact the cell surface, accelerating heat transfer and avoiding the "edge cooling, center overheating" problem caused by traditional lateral airflow channels. Secondly, the tray used in this embodiment is a vertical tray, which carries 48 short-blade batteries. Compared to a horizontal tray, the vertical tray structure used in this embodiment can accommodate more batteries per tray, saving internal space and improving the utilization rate of vertical space within the tray.

[0054] In this embodiment, the equipment cabinet 1 has a central frame 4, the temperature equalization fan 6 is fixed on the top of the central frame 4, and below the temperature equalization fan 6, the battery tray 7 carrying the battery pack 3 and the capacity equalization device 2 are arranged sequentially from top to bottom on the central frame 4.

[0055] The specific internal air circulation in this embodiment is as follows: Figure 6 As shown, the heat exchanger 8 and the refrigerant circulating fan 10 form an exhaust mechanism, which draws the heat generated by the capacity distribution device 2 into the heat dissipation component 5. After being cooled by the heat exchanger 8, the air becomes cold air. Under the guidance of the circulating air duct 9, the air is blown back into the equipment cabinet 1 by the refrigerant circulating fan 10, and then blown towards the battery pack 3 by the temperature equalization fan 6 to achieve temperature equalization of the battery pack 3.

[0056] The specific text description is as follows: The heat generated by the capacity grading device 2 is drawn into the heat dissipation component 5, cooled by the heat exchanger 8 to form cold air, rises naturally in the circulating air duct 9, is blown back into the equipment cabinet 1 by the refrigerant circulating fan 10, and blown towards the battery pack 3 and the capacity grading device 2 by the temperature equalization fan 6.

[0057] The refrigerant circulating fan 10 and the heat exchanger 8 constitute the exhaust mechanism, which actively draws the heat generated by the distribution equipment 2 into the heat dissipation component 5, preventing heat from accumulating in the equipment cabinet 1. Compared with natural convection, active exhaust can quickly transfer heat, and the response speed is improved by more than 50%, which is especially suitable for high heat generation conditions. All airflow circulates in the closed system, which not only avoids energy waste but also prevents external pollutants from entering. The circulating air duct 9 ensures 100% effective utilization of cold air, and the airflow utilization rate is greatly improved compared with the open system.

[0058] To ensure the thermal balance of the entire system, in this embodiment, the heat exchanger 8 is provided with a fluid inlet and a fluid outlet. The cold medium flows in from the fluid inlet and flows out from the fluid outlet. The heat transferred through the heat exchanger 8 is transferred to the cold medium and discharged along with the outflow of the cold medium, thereby dissipating the heat inside the storage space. The heat exchanger 8 serves as the only heat outlet of the internal circulation system, transferring the heat inside the equipment to the external environment and realizing the core cooling function.

[0059] In addition, to further realize the real-time switching of the working state of heat exchanger 8, an on / off valve for controlling the opening and closing of the refrigerant is installed at the fluid inlet; the on / off valve can automatically adjust the valve opening according to the real-time temperature. The on / off valve supports multiple working modes such as fully open / half open / fully closed, and can completely cut off the refrigerant supply during low heat load periods to avoid energy waste.

[0060] In this embodiment, as Figure 2 or Figure 6 As shown, in the equipment cabinet 1, the horizontal height of the temperature equalization fan 6 in the central frame 4 is lower than the horizontal height of the refrigerant circulation fan 10 in the heat dissipation assembly 5. The staggered arrangement of the temperature equalization fan 6 and the refrigerant circulation fan 10 ensures that the cold air discharged from the refrigerant circulation fan 10 is smoothly blown towards the temperature equalization fan 6. The height difference between them forms the natural gas flow direction, ensuring unidirectional airflow and preventing short-circuiting.

[0061] To coordinate the operation of the two symmetrically arranged heat dissipation components 5, based on the aforementioned height difference setting:

[0062] like Figure 1 As shown, above the temperature equalization fan 6, there is a duct baffle 11 that separates the air duct. One end of the duct baffle 11 is connected to the equipment cabinet 1, and the other end is connected to the middle frame 4. In this embodiment, the duct baffle 11 separates the airflow paths of the heat dissipation components 5 on both sides to prevent the airflow of the refrigerant circulation fans 10 on both sides from interfering with each other.

[0063] The working principle described in this utility model is as follows:

[0064] During the capacity testing process, the heat exchanger 8 and the refrigerant circulating fan 10 form an exhaust mechanism, drawing the heat generated by the capacity testing equipment 2 into the heat dissipation components 5. After being cooled by the heat exchanger 8, the air becomes cold air, which is then guided by the circulating air duct 9 and re-enters the equipment cabinet 1 by the refrigerant circulating fan 10. Subsequently, it is blown by the temperature equalization fan 6 onto the battery pack 3 to achieve temperature equalization of the battery pack 3. Since the heat dissipation gaps of the individual cells in the battery pack 3 and the partially perforated battery tray 7 form a vertically penetrating air duct, the air blown by the temperature equalization fan 6 passes through the air duct, reaches the bottom of the temperature control system, and carries away the heat from the battery pack 3 and the capacity testing equipment 2, which is then drawn back into the heat dissipation components 5 on both sides. This forms an internal circulation within the air duct of the temperature control system.

[0065] Other structures described in this embodiment are described in the prior art.

[0066] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A blade lithium battery temperature control system, comprising an equipment cabinet and a capacity grading device, wherein the capacity grading device is centrally located within the equipment cabinet, characterized in that, Also includes: The battery tray has a partially open bottom to support the battery pack. A heat dissipation assembly is symmetrically arranged on the side wall of the equipment cabinet. The heat dissipation assembly includes a heat exchanger, a circulating air duct, and a refrigerant circulating fan. The heat exchanger is located at the bottom of the heat dissipation assembly, and the refrigerant circulating fan is located at the top of the heat dissipation assembly. The heat exchanger and the refrigerant circulating fan are connected by the circulating air duct. The heat generated by the capacity-distributing equipment is drawn into the heat dissipation assembly for cooling and then forms cold air that re-enters the equipment cabinet. A temperature equalization fan is located directly above the battery pack. The temperature equalization fan blows the cold air toward the battery pack and the capacity grading equipment. The heat dissipation gaps of the individual cells in the battery pack and the partially hollowed-out battery tray form an air duct that runs vertically through the pack.

2. The blade lithium battery temperature control system according to claim 1, characterized in that, The equipment cabinet has a central frame, and the temperature equalization fan is fixed at the top of the central frame. Below the temperature equalization fan, the battery tray carrying the battery pack and the capacity equalization device are arranged sequentially from top to bottom on the central frame.

3. The blade lithium battery temperature control system according to claim 1, characterized in that, The heat exchanger and refrigerant circulating fan form an exhaust mechanism that draws the heat generated by the capacity distribution equipment into the heat dissipation component. After being cooled by the heat exchanger, the air becomes cold air and, guided by the circulating air duct, re-enters the equipment cabinet through the refrigerant circulating fan. Subsequently, the temperature equalization fan blows the air onto the battery pack to achieve temperature equalization of the battery pack.

4. The blade lithium battery temperature control system according to claim 1, characterized in that, The heat exchanger is provided with a fluid inlet and a fluid outlet. The cold medium flows in from the fluid inlet and flows out from the fluid outlet. The heat is transferred to the cold medium through the heat exchanger and discharged along with the outflow of the cold medium, thereby removing the heat inside the storage space.

5. The blade lithium battery temperature control system according to claim 4, characterized in that, An on / off valve is installed at the fluid inlet to control the opening and closing of the refrigerant.

6. The blade lithium battery temperature control system according to claim 2, characterized in that, In the equipment cabinet, the horizontal height of the temperature equalization fan in the middle frame is lower than the horizontal height of the refrigerant circulation fan in the heat dissipation assembly.

7. The blade lithium battery temperature control system according to claim 6, characterized in that, Above the temperature equalization fan, there is a duct baffle that separates the air duct. One end of the duct baffle is connected to the equipment cabinet, and the other end is connected to the middle frame.

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