An integrated device for a high-efficiency thermal management system for cylindrical batteries

Abstract

This utility model belongs to the technical field of cylindrical battery structure, specifically relating to an integrated device for a high-efficiency thermal management system for cylindrical batteries. It includes a housing and multiple cylindrical batteries, each consisting of a cover plate, a cylindrical shell surface, and a bottom shell from top to bottom. A battery explosion-proof valve is provided on the bottom shell. The cylindrical batteries are arranged in rows within the housing, with two rows forming a group. A first thermal management section is provided between adjacent rows within the same group. The housing consists of side beams and a bottom plate. A crossbeam is provided on the bottom plate, and cavities are formed within the side beams and crossbeams. Multiple grooves are also provided on the bottom plate, with flow channels between adjacent grooves forming a second thermal management section. This utility model has higher thermal conductivity, allowing for high-rate charging and discharging of large-size cylindrical batteries, thus improving the fast-charging performance of large-size cylindrical batteries.

Description

Technical Field

[0001] This utility model belongs to the technical field of cylindrical battery structure, specifically relating to an integrated device for a high-efficiency thermal management system for cylindrical batteries. Background Technology

[0002] Lithium-ion or sodium-ion batteries have advantages such as light weight, large energy storage, high power, no pollution, long life, low self-discharge coefficient, and wide temperature adaptability. Therefore, they have gradually gained popularity and have gradually replaced other traditional batteries in the fields of energy storage and power batteries.

[0003] Cylindrical batteries are characterized by high production efficiency, low production cost, and good product consistency. However, cylindrical batteries, especially large cylindrical batteries, have poor internal heat dissipation due to their numerous winding layers. During high-rate charging and discharging, if heat cannot be dissipated in time, it will severely affect the fast-charging performance of the cylindrical battery and also significantly impact its lifespan. Therefore, for large cylindrical batteries, it is essential to design a thermal management system integration scheme with higher thermal conductivity to improve their fast-charging performance. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated device for a high-efficiency thermal management system for cylindrical batteries, which has higher thermal conductivity, allows large-size cylindrical batteries to be charged and discharged at high rates, and improves the fast-charging performance of large-size cylindrical batteries.

[0005] The purpose of this utility model is achieved as follows: an integrated device for a high-efficiency thermal management system for cylindrical batteries includes a housing and multiple cylindrical batteries. The cylindrical batteries, from top to bottom, consist of a cover plate, a cylindrical shell surface, and a shell bottom. A battery explosion-proof valve is provided on the shell bottom. The cylindrical batteries are arranged in rows inside the housing, with two rows of cylindrical batteries forming a group. A first thermal management section is provided between two adjacent rows of cylindrical batteries in the same group. Heat conduction between the cylindrical shell surfaces of two adjacent rows of cylindrical batteries in the same group can be achieved through the first thermal management section.

[0006] The housing consists of side beams and a bottom plate. A crossbeam is provided on the bottom plate, and cavities are provided in the side beams and the crossbeam. Multiple grooves are also provided on the bottom plate, and flow channels are provided between adjacent grooves to form a second thermal management section. The bottom of the cylindrical battery casing contacts the bottom plate, and heat conduction between the bottom plate and the cylindrical battery can be achieved through the second thermal management section.

[0007] The first thermal management unit 6 is a serpentine cooling plate arranged along both sides of the two adjacent rows of cylindrical batteries 5, and the first thermal management unit 6 and the second thermal management unit 2-7 are connected liquid cooling mechanisms; the rear end face of the side beam 2-1 of the housing is provided with a liquid inlet 2-8 and a liquid outlet 2-9, and the coolant enters the first thermal management unit 6 and the second thermal management unit 2-7 from the liquid inlet 2-8 and flows out from the liquid outlet 2-9 to realize the circulation of coolant.

[0008] Furthermore, an explosion-proof valve is provided on the front end face of the side beam of the enclosure. When the cylindrical battery experiences thermal runaway, the high-temperature flue gas can eventually be discharged from the enclosure through the explosion-proof valve.

[0009] Furthermore, the housing contains multiple sets of cylindrical batteries, and a heat insulation plate is provided between two adjacent sets of cylindrical batteries.

[0010] Furthermore, a positioning bracket is provided on the bottom plate of the housing, and the cylindrical battery is positioned between two adjacent positioning brackets.

[0011] Furthermore, an insulating plate is provided on the bottom plate of the casing, and the insulating plate is located below the cylindrical battery.

[0012] Furthermore, a CCS assembly is disposed on the top of the cylindrical battery, and a foamed structural adhesive is disposed on the outside of the cylindrical battery.

[0013] Furthermore, the enclosure is a box-shaped structure with one open side and a lid on top, through which the insulating board, positioning bracket, heat insulation board, cylindrical battery, CCS assembly, foamed structural adhesive, etc. are sealed inside the enclosure.

[0014] Furthermore, the integrated device for a high-efficiency thermal management system for cylindrical batteries also includes a lower protective plate, which is disposed at the bottom of the housing.

[0015] The beneficial effects of this utility model are as follows: This utility model provides an integrated device for a high-efficiency thermal management system for cylindrical batteries. The cylindrical battery utilizes a first thermal management unit and a second thermal management unit to manage the thermal properties of the cylindrical surface and bottom of the casing, respectively. This results in higher thermal conductivity, allowing for high-rate charging and discharging of the cylindrical battery and improving its fast-charging performance. In the event of thermal runaway in a localized cylindrical battery, high-temperature fumes can enter the bottom groove of the casing through the battery explosion-proof valve, then enter the crossbeam and side beam cavities, and finally exit the casing through the casing explosion-proof valve, preventing overall thermal runaway of the battery pack. Attached Figure Description

[0016] Figure 1 The diagram shown is an exploded view of the structure of this utility model.

[0017] Figure 2The diagram shown is a schematic of the top state of the cylindrical battery of this utility model.

[0018] Figure 3 The diagram shown is a schematic of the bottom state of the cylindrical battery of this utility model.

[0019] Figure 4 The diagram shown is a structural schematic of the housing of this utility model.

[0020] Figure 5 The image shown is an enlarged view of a portion A of the housing of this utility model.

[0021] Figure 6 The diagram shown is a schematic of the top of the cylindrical battery pack of this utility model.

[0022] Figure 7 The image shown is a cross-sectional view of the battery pack of this utility model.

[0023] Figure 8 The image shown is an enlarged view of a portion B of the cross-sectional view of the battery pack of this utility model. Detailed Implementation

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] It should be noted that all directional indications (such as up-down-left-right-forward-backward...) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0027] like Figure 1-8As shown, an integrated device for a high-efficiency thermal management system for cylindrical batteries includes a housing 2 and multiple cylindrical batteries 5. The cylindrical batteries 5, from top to bottom, consist of a cover plate 5-1, a cylindrical shell surface 5-2, and a bottom shell 5-3. A battery explosion-proof valve 5-4 is installed on the bottom shell 5-3. In the event of thermal runaway, high-temperature fumes can be discharged from the battery through the battery explosion-proof valve 5-4, preventing the battery from exploding. The cylindrical batteries 5 are arranged in rows within the housing 2, with two rows of cylindrical batteries 5 forming a group. A first thermal management unit 6 is installed between adjacent rows of cylindrical batteries 5 within the same group. Heat conduction between the cylindrical shell surfaces 5-2 of adjacent rows of cylindrical batteries 5 within the same group can occur through the first thermal management unit 6.

[0028] The box body 2 is composed of box body side beams 2-1 and box body bottom plate 2-2. A crossbeam 2-3 is provided on the box body bottom plate 2-2. A cavity 2-4 is provided in the box body side beams 2-1 and crossbeams 2-3. A plurality of grooves 2-6 are also provided on the box body bottom plate 2-2. A flow channel is provided between two adjacent grooves 2-6 to form a second heat management section 2-7.

[0029] The first thermal management unit 6 is a serpentine cooling plate arranged along both sides of two adjacent rows of cylindrical batteries 5, and the first thermal management unit 6 and the second thermal management unit 2-7 are connected liquid cooling mechanisms; the rear end face of the side beam 2-1 of the housing is provided with a liquid inlet 2-8 and a liquid outlet 2-9. The coolant enters the first thermal management unit 6 and the second thermal management unit 2-7 from the liquid inlet 2-8 and flows out from the liquid outlet 2-9 to realize the circulation of the coolant, thereby performing efficient and stable thermal management and control of the cylindrical battery 5 through the first thermal management unit 6 and the second thermal management unit 2-7.

[0030] The bottom 5-3 of the cylindrical battery 5 is in contact with the bottom plate 2-2 of the housing. Heat conduction between the bottom plate 2-2 and the cylindrical battery 5 can be achieved through the second thermal management unit 2-7. The cylindrical battery 5 performs thermal management on the cylindrical surface 5-2 and the bottom 5-3 of the housing through the first thermal management unit 6 and the second thermal management unit 2-7 respectively, which has higher thermal conductivity and allows the cylindrical battery 5 to be charged and discharged at high rates, thereby improving the fast charging performance of the cylindrical battery 5.

[0031] Furthermore, in one embodiment, an explosion-proof valve 2-5 is provided on the front end face of the side beam 2-1 of the housing. When the cylindrical battery 5 experiences thermal runaway, high-temperature flue gas can enter the crossbeam 2-3 and the cavity 2-4 in the side beam 2-1 of the housing through the groove 2-6, and finally be discharged from the housing 2 through the explosion-proof valve 2-5, preventing the housing 2 from exploding and catching fire.

[0032] Furthermore, in one embodiment, the housing 2 is provided with multiple sets of cylindrical batteries 5, and a heat insulation plate 7 is provided between two adjacent sets of cylindrical batteries 5. The heat insulation plate 7 can thermally isolate the two sets of cylindrical batteries 5 to prevent the heat from spreading between the sets when a cylindrical battery 5 in a certain set experiences thermal runaway.

[0033] Furthermore, in one embodiment, a positioning bracket 4 is provided on the bottom plate 2-2 of the housing, and the cylindrical battery 5 is disposed between two adjacent positioning brackets 4. The cylindrical battery 5 can be positioned and fixed on the bottom plate 2-2 of the housing through the positioning bracket 4.

[0034] Furthermore, in one embodiment, an insulating plate 3 is provided on the bottom plate 2-2 of the housing, and the insulating plate 3 is disposed below the cylindrical battery 5.

[0035] Furthermore, in one embodiment, a CCS component 8 is disposed above the cylindrical battery 5, and a foamed structural adhesive 9 is disposed on the outside of the cylindrical battery 5.

[0036] Furthermore, in one embodiment, the housing 2 is a box-shaped structure with one open side, and a cover 10 is provided on the top of it. The cover 10 seals the insulating board 3, positioning bracket 4, heat insulation board 7, cylindrical battery 5, CCS component 8, foamed structural adhesive 9, etc. inside the housing 2.

[0037] Furthermore, in one embodiment, the integrated device for a high-efficiency thermal management system for cylindrical batteries further includes a lower protective plate 1, which is disposed at the bottom of the housing 2. The housing 2 is protected at its bottom by the lower protective plate 1 to prevent the bottom from colliding with and squeezing the cylindrical battery 5.

[0038] In summary, this utility model discloses an integrated device for a high-efficiency thermal management system for cylindrical batteries. The cylindrical battery utilizes a first thermal management unit and a second thermal management unit to manage the thermal properties of the cylindrical surface and bottom of the casing, respectively. This results in higher thermal conductivity, allowing for high-rate charging and discharging of the cylindrical battery and improving its fast-charging performance. In the event of thermal runaway in a localized cylindrical battery, high-temperature fumes can enter the bottom groove of the casing through the battery explosion-proof valve, then enter the cavities of the crossbeams and side beams, and finally be discharged from the casing through the casing explosion-proof valve, preventing overall thermal runaway of the battery pack.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cylindrical battery high-efficiency thermal management system integrated device, characterized by, The device includes a housing (2) and multiple cylindrical batteries (5). The cylindrical batteries (5) are arranged from top to bottom as a cover plate (5-1), a cylindrical shell surface (5-2), and a shell bottom (5-3). A battery explosion-proof valve (5-4) is provided on the shell bottom (5-3). The cylindrical batteries (5) are arranged in rows inside the housing (2), with two rows of cylindrical batteries (5) forming a group. A first thermal management section (6) is provided between two adjacent rows of cylindrical batteries (5) in the same group. The box body (2) is composed of a box body side beam (2-1) and a box body bottom plate (2-2). A crossbeam (2-3) is provided on the box body bottom plate (2-2). A cavity (2-4) is provided in the box body side beam (2-1) and the crossbeam (2-3). A plurality of grooves (2-6) are also provided on the box body bottom plate (2-2). A flow channel is provided between two adjacent grooves (2-6) to form a second heat management section (2-7). The first thermal management unit (6) is a serpentine cooling plate arranged along both sides of the two adjacent rows of cylindrical batteries (5), and the first thermal management unit (6) and the second thermal management unit (2-7) are connected liquid cooling mechanisms; the rear end face of the box side beam (2-1) is provided with a liquid inlet (2-8) and a liquid outlet (2-9).

2. The integrated device for a high-efficiency thermal management system for cylindrical batteries according to claim 1, characterized in that, An explosion-proof valve (2-5) is provided on the front end face of the box side beam (2-1).

3. The integrated device for a high-efficiency thermal management system for cylindrical batteries according to claim 1, characterized in that, Multiple sets of cylindrical batteries (5) are installed inside the housing (2), and a heat insulation plate (7) is provided between two adjacent sets of cylindrical batteries (5).

4. The integrated device for a high-efficiency thermal management system for cylindrical batteries according to claim 1, characterized in that, A positioning bracket (4) is provided on the bottom plate (2-2) of the box, and the cylindrical battery (5) is positioned between two adjacent positioning brackets (4).

5. The integrated device for a high-efficiency thermal management system for cylindrical batteries according to claim 4, characterized in that, An insulating plate (3) is provided on the bottom plate (2-2) of the box body, and the insulating plate (3) is located below the cylindrical battery (5).

6. The integrated device for a high-efficiency thermal management system for cylindrical batteries according to claim 1, characterized in that, A CCS assembly (8) is disposed on the top of the cylindrical battery (5), and a foamed structural adhesive (9) is disposed on the outside of the cylindrical battery (5).

7. The integrated device for a high-efficiency thermal management system for cylindrical batteries according to claim 1, characterized in that, The box (2) is a box-shaped structure with one side open, and a box cover (10) is provided on the top.

8. The integrated device for a high-efficiency thermal management system for cylindrical batteries according to claim 1, characterized in that, It also includes a lower guard plate (1), which is disposed at the bottom of the box body (2).

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