Molecular sieve device, nitrogen protection system, power battery system and new energy vehicle

Abstract

The utility model relates to the field of fire prevention and suppression devices suitable for road vehicle battery packs, in particular to a molecular sieve device, a nitrogen protection system, a power battery system and a new energy vehicle. The molecular sieve device comprises a tank body, a series molecular sieve group is arranged in the tank body, the series molecular sieve group comprises at least two molecular sieves which are connected in series and arranged side by side so as to meet the separation purity of nitrogen, separation cavities corresponding to the molecular sieves are formed in the tank body, and the molecular sieves are arranged in the corresponding separation cavities. And the separation cavities corresponding to the molecular sieves in the same series molecular sieve group are connected in series. As the separation cavities corresponding to the molecular sieves are arranged in the same tank body, compared with the prior art, the molecular sieve device does not need to be assembled on the sieve beds of the molecular sieves, so that the structure of the molecular sieve device can be simplified, the mounting process of the molecular sieve device is simpler, and the whole molecular sieve device is more compact by adopting the structure.

Description

Technical Field

[0001] This utility model relates to the field of fire prevention and suppression devices applicable to battery packs of highway vehicles, and in particular to a molecular sieve device, a nitrogen protection system, a power battery system, and new energy vehicles. Background Technology

[0002] A battery pack nitrogen protection system prevents fires by filling the battery pack with nitrogen to create an oxygen-free environment. For example, patent specification CN217908665U, published on November 29, 2022, discloses a battery pack nitrogen protection system. This system utilizes the vehicle's air supply, separates the nitrogen, and then, under the control of a controller and a series of solenoid valves, delivers the nitrogen into the battery pack in a specific strategy, thus maintaining a constant nitrogen level and preventing fires.

[0003] The aforementioned patent specification discloses methods for nitrogen production using nitrogen separation membranes and molecular sieves. Nitrogen separation membranes are expensive, a major reason for the high cost of battery pack nitrogen protection systems. Molecular sieve nitrogen production offers the advantage of low cost, but it also has certain drawbacks. Specifically, to achieve a certain purity, the molecular sieve must have sufficient processing stroke. However, the tanks used for nitrogen production are generally vertical, requiring considerable height to meet purity requirements. Due to space limitations, applying this method to battery pack nitrogen protection systems presents certain challenges.

[0004] Patent specification CN213790801U, with authorization announcement date of July 27, 2021, discloses a low-height airborne oxygen-generating molecular sieve bed, which is actually a molecular sieve for nitrogen-oxygen separation. The patent specification discloses a scheme of arranging two straight-cylinder molecular sieve beds side-by-side and connecting them in series via a bridging pipe, thereby reducing the height of the molecular sieve while ensuring the purity of the generated gas. While this scheme can reduce the height of the molecular sieve, the assembly of the two molecular sieve beds and their installation within the small space of the battery pack nitrogen protection system still present challenges due to complex installation processes and low efficiency. Utility Model Content

[0005] One of the objectives of this invention is to provide a molecular sieve device to solve the problem of complex structure and inconvenient installation caused by the need to assemble multiple molecular sieves in existing series molecular sieve devices.

[0006] Meanwhile, the purpose of this utility model is also to provide a nitrogen protection system, a power battery system, and a new energy vehicle that uses the above-mentioned molecular sieve device.

[0007] To solve the above problems, the molecular sieve device of this utility model adopts the following technical solution:

[0008] A molecular sieve device includes a tank containing a series molecular sieve group. The series molecular sieve group includes at least two molecular sieves connected in series and arranged side by side to meet the separation purity of nitrogen. The tank contains separation chambers corresponding to each molecular sieve, and each molecular sieve is arranged in its corresponding separation chamber. The separation chambers corresponding to each molecular sieve in the same series molecular sieve group are connected in series.

[0009] Furthermore, the separation chambers of each molecular sieve within the same series molecular sieve group are connected in series via pipelines provided outside the tank.

[0010] Furthermore, the separation chambers of each molecular sieve in the same series molecular sieve group are connected in series through channels provided in the partition walls between the corresponding separation chambers.

[0011] Furthermore, the tank body includes a cylindrical body and cylindrical covers at both ends of the cylindrical body, the cylindrical covers being an integral structure.

[0012] Furthermore, the caps at both ends of the cylinder are connected to the cylinder body by clamping screws, and are sealed to the corresponding ends of the cylinder body under the clamping action of the clamping screws.

[0013] Furthermore, the outer wall of the cylinder is provided with axially extending ribs, and the ribs are provided with connecting holes corresponding to the clamping screws.

[0014] Furthermore, the cylindrical body is a cylindrical body cut from a profile.

[0015] The beneficial effects of this molecular sieve device are as follows: This molecular sieve device is a pioneering invention. Specifically, by setting up a series of molecular sieve groups in the tank, the purity of nitrogen production can be guaranteed. By arranging the molecular sieves in the series group side by side, the overall height of the device can be reduced to meet space requirements. Since the separation chambers corresponding to each molecular sieve are set in the same tank, and each molecular sieve is set in its corresponding separation chamber, compared with the prior art, there is no need to assemble the sieve beds of each molecular sieve, thereby simplifying the structure of the molecular sieve device and making its installation process simpler. Furthermore, by adopting the above structure, the molecular sieve device as a whole will be more compact.

[0016] The nitrogen protection system of this utility model adopts the following technical solution:

[0017] A nitrogen protection system includes a gas source and a molecular sieve device connected to the gas source. The molecular sieve device includes a tank, in which a series molecular sieve group is arranged. The series molecular sieve group includes at least two molecular sieves connected in series and arranged side by side to meet the separation purity of nitrogen. The tank is provided with a separation chamber corresponding to each molecular sieve, and each molecular sieve is arranged in the corresponding separation chamber. The separation chambers corresponding to each molecular sieve in the same series molecular sieve group are connected in series.

[0018] Furthermore, the separation chambers of each molecular sieve within the same series molecular sieve group are connected in series via pipelines provided outside the tank.

[0019] Furthermore, the separation chambers of each molecular sieve in the same series molecular sieve group are connected in series through channels provided in the partition walls between the corresponding separation chambers.

[0020] Furthermore, the tank body includes a cylindrical body and cylindrical covers at both ends of the cylindrical body, the cylindrical covers being an integral structure.

[0021] Furthermore, the caps at both ends of the cylinder are connected to the cylinder body by clamping screws, and are sealed to the corresponding ends of the cylinder body under the clamping action of the clamping screws.

[0022] Furthermore, the outer wall of the cylinder is provided with axially extending ribs, and the ribs are provided with connecting holes corresponding to the clamping screws.

[0023] Furthermore, the cylindrical body is a cylindrical body cut from a profile.

[0024] The beneficial effects of the nitrogen protection system of this utility model are as follows: The nitrogen protection system of this utility model is an improved invention. Specifically, the molecular sieve device of the nitrogen protection system of this utility model can ensure the purity of nitrogen production by setting a series of molecular sieve groups in the tank. By arranging the molecular sieves of the series molecular sieve group side by side, the overall height of the device can be reduced to meet the space requirements. Since the separation chambers corresponding to each molecular sieve are set in the same tank, and each molecular sieve is set in its corresponding separation chamber, compared with the prior art, there is no need to assemble the sieve beds of each molecular sieve, thereby simplifying the structure of the molecular sieve device and making its installation process simpler. Furthermore, by adopting the above structure, the molecular sieve device as a whole will be more compact.

[0025] The power battery system of this utility model adopts the following technical solution:

[0026] A power battery system includes a battery pack, the battery pack being equipped with a nitrogen protection system. The nitrogen protection system includes a gas source and a molecular sieve device connected to the gas source. The molecular sieve device includes a tank, in which a series molecular sieve group is arranged. The series molecular sieve group includes at least two molecular sieves connected in series and arranged side by side to meet the separation purity of nitrogen. A separation chamber corresponding to each molecular sieve is provided in the tank, and each molecular sieve is arranged in its corresponding separation chamber. The separation chambers corresponding to each molecular sieve in the same series molecular sieve group are connected in series.

[0027] Furthermore, the separation chambers of each molecular sieve within the same series molecular sieve group are connected in series via pipelines provided outside the tank.

[0028] Furthermore, the separation chambers of each molecular sieve in the same series molecular sieve group are connected in series through channels provided in the partition walls between the corresponding separation chambers.

[0029] Furthermore, the tank body includes a cylindrical body and cylindrical covers at both ends of the cylindrical body, the cylindrical covers being an integral structure.

[0030] Furthermore, the caps at both ends of the cylinder are connected to the cylinder body by clamping screws, and are sealed to the corresponding ends of the cylinder body under the clamping action of the clamping screws.

[0031] Furthermore, the outer wall of the cylinder is provided with axially extending ribs, and the ribs are provided with connecting holes corresponding to the clamping screws.

[0032] Furthermore, the cylindrical body is a cylindrical body cut from a profile.

[0033] The beneficial effects of this utility model's power battery system: This utility model's power battery system is an improved invention. Specifically, in this utility model's power battery system, the molecular sieve device of the nitrogen protection system can ensure the purity of nitrogen production by setting a series of molecular sieve groups in the tank. By arranging the molecular sieves of the series molecular sieve group side by side, the overall height of the device can be reduced to meet space requirements. Since the separation chambers corresponding to each molecular sieve are set in the same tank, and each molecular sieve is set in its corresponding separation chamber, compared with the prior art, there is no need to assemble the sieve beds of each molecular sieve, thereby simplifying the structure of the molecular sieve device and making its installation process simpler. Furthermore, by adopting the above structure, the molecular sieve device as a whole will be more compact.

[0034] The new energy vehicle of this utility model adopts the following technical solution:

[0035] A new energy vehicle includes a power battery system, the power battery system including a battery pack, the battery pack being equipped with a nitrogen protection system, the nitrogen protection system including a gas source and a molecular sieve device connected to the gas source, the molecular sieve device including a tank, the tank containing a series molecular sieve group, the series molecular sieve group including at least two molecular sieves connected in series and arranged side by side to meet the separation purity of nitrogen, the tank containing separation chambers corresponding to each molecular sieve, each molecular sieve being arranged in a corresponding separation chamber, the separation chambers corresponding to each molecular sieve in the same series molecular sieve group being connected in series.

[0036] Furthermore, the separation chambers of each molecular sieve within the same series molecular sieve group are connected in series via pipelines provided outside the tank.

[0037] Furthermore, the separation chambers of each molecular sieve in the same series molecular sieve group are connected in series through channels provided in the partition walls between the corresponding separation chambers.

[0038] Furthermore, the tank body includes a cylindrical body and cylindrical covers at both ends of the cylindrical body, the cylindrical covers being an integral structure.

[0039] Furthermore, the caps at both ends of the cylinder are connected to the cylinder body by clamping screws, and are sealed to the corresponding ends of the cylinder body under the clamping action of the clamping screws.

[0040] Furthermore, the outer wall of the cylinder is provided with axially extending ribs, and the ribs are provided with connecting holes corresponding to the clamping screws.

[0041] Furthermore, the cylindrical body is a cylindrical body cut from a profile.

[0042] The beneficial effects of this new energy vehicle: This new energy vehicle is an improved invention. Specifically, in this new energy vehicle, the molecular sieve device of the nitrogen protection system ensures the purity of nitrogen production by setting a series of molecular sieve groups in the tank. By arranging the molecular sieves of the series molecular sieve group side by side, the overall height of the device can be reduced to meet space requirements. Since the separation chambers corresponding to each molecular sieve are set in the same tank, and each molecular sieve is set in its corresponding separation chamber, compared with the prior art, there is no need to assemble the sieve beds of each molecular sieve, thereby simplifying the structure of the molecular sieve device and making its installation process simpler. Furthermore, by adopting the above structure, the molecular sieve device as a whole becomes more compact. Attached Figure Description

[0043] Figure 1 This is a perspective view of one embodiment of a molecular sieve device;

[0044] Figure 2 yes Figure 1Front view of the molecular sieve device in the image;

[0045] Figure 3 yes Figure 2 The left view;

[0046] Figure 4 yes Figure 3 AA section view;

[0047] Figure 5 yes Figure 1 A schematic diagram of the structure of the cylinder;

[0048] Figure 6 This is a perspective view of another embodiment of the molecular sieve device;

[0049] Figure 7 yes Figure 6 First perspective view of the cylinder in the middle;

[0050] Figure 8 yes Figure 6 The second perspective view of the cylinder in the middle;

[0051] Figure 9 This is a schematic diagram of one embodiment of a nitrogen protection device;

[0052] Figure 10 yes Figure 9 A schematic diagram of the nitrogen protection device after removing the cover.

[0053] In the diagram: 1. Tank body; 101. Separation chamber; 102. Inlet; 103. Outlet; 104. Partition wall; 105. Channel; 106. Cylinder body; 107. Cylinder cover; 108. Rib; 2. Pipeline; 3. Clamping screw; 4. Molecular sieve device; 5. Box body. Detailed Implementation

[0054] The features and performance of this utility model will be further described in detail below with reference to specific embodiments.

[0055] Molecular sieve nitrogen generation has advantages such as low cost and mature technology, but it also has the characteristics of high height and complex structure. This limitation restricts its application in confined spaces. While parallel series connection of molecular sieves can effectively reduce the height of the nitrogen generation device, series connection involves practical issues such as the fixed assembly of the sieve beds, resulting in complex structure and inconvenient installation. Integrating series-connected molecular sieves into a single unified tank can effectively alleviate these problems. Based on the above inventive concept, this invention proposes technical solutions for a molecular sieve device, a nitrogen protection system, a power battery system, and new energy vehicles.

[0056] Based on the above inventive concept, the specific implementation of the molecular sieve device of this utility model is as follows:

[0057] The molecular sieve device of this invention includes a tank 1, which provides a sieve bed for the molecular sieve (not shown in the figure). Therefore, a separation chamber 101 is arranged within the tank, which is the chamber in which the molecular sieve performs its separation function. To meet the requirements of the molecular sieve operation, the separation chamber 101 needs to have an inlet 102 for the gas to be separated and an outlet 103 for the gas to be produced. This should be understandable to those skilled in the art. In actual manufacturing, the tank 1 can be formed by casting, injection molding, or sheet metal, etc., only needing to ensure the position and size of the separation chamber 101. In fact, it can be formed using any available method. Since heating may be required during use, preferably, the tank 1 can be made of a thermally conductive metal material. When heating is required, a heating device is installed on the outside of the tank. Specifically, an electric heating film can be used.

[0058] A series molecular sieve assembly is provided in the tank 1. This assembly comprises at least two molecular sieves connected in series and arranged side-by-side to meet the required purity for nitrogen separation. Depending on the required nitrogen purity, each series molecular sieve assembly may contain two, three, four, or more molecular sieves. For a nitrogen protection system used in a battery pack, two molecular sieves connected in series are generally sufficient. Regarding the selection of molecular sieve materials, the choice of materials for nitrogen production is common knowledge in this field and will not be elaborated upon here.

[0059] Corresponding to each molecular sieve, multiple separation chambers 101 are provided in the tank 1, and each molecular sieve is arranged in a corresponding separation chamber 101. The separation chambers 101 of each molecular sieve in the same series molecular sieve group are connected in series. Specifically, the outlet of the separation chamber of one of the two molecular sieves connected in series is connected to the inlet of the other, which is also to realize the series connection between each molecular sieve in the same series molecular sieve group.

[0060] The molecular sieve device of this invention sets multiple separation chambers 101 in a tank 1, and uses multiple separation chambers to house the series molecular sieve group. This simplifies the structure of the molecular sieve device while meeting the separation purity requirements and reducing the height of the molecular sieve device, and brings convenience to its installation and other operations.

[0061] The series connection between the separation cavities 101 can be implemented in different ways as needed. For example, in Figure 1-5In the illustrated embodiment, the series connection between different separation chambers 101 is achieved through a pipeline 2 located outside the tank body 1. Specifically, in this embodiment, two separation chambers 101 are provided on the tank body 1. An inlet 102 is provided at the bottom of the upstream separation chamber (this inlet can be configured with a tee connector to simultaneously form an outlet for discharging oxygen-enriched gas generated during the separation process), and an outlet 103 is provided at the top. This outlet is connected to the inlet 102 located at the bottom of the downstream separation chamber through the pipeline 2 outside the tank body, thereby connecting the two separation chambers in series. When the number of separation chambers 101 is greater than two, the separation chambers 101 can be connected in series sequentially in the above manner. Of course, when a larger gas volume is required, more series molecular sieve groups can be set up. In this case, only the separation chambers corresponding to the molecular sieves within the series molecular sieve groups are connected in series. Different series molecular sieve groups are connected in parallel.

[0062] exist Figure 6-8 In the illustrated embodiment, the separation chambers 101 corresponding to each molecular sieve in the same series molecular sieve group are connected in series via channels 105 provided on the partition walls 104 between the respective separation chambers. The channels 105 are formed by drilling holes in the partition walls; for example, a blind hole is drilled at the top of the upstream separation chamber to form an outlet, and a hole is drilled at the bottom of the downstream separation chamber to form an inlet. In other embodiments, a blind hole can also be drilled at the top of the upstream separation chamber to form an outlet, and a blind hole can be drilled at the bottom of the downstream separation chamber to form an inlet. A vertical blind hole is drilled in the partition wall to connect the inlet and outlet, and then the opening end of the vertical blind hole is sealed with a plug.

[0063] In a preferred embodiment, such as Figure 5 As shown, the tank 1 includes a cylindrical body 106 and caps 107 at both ends of the cylindrical body 106, with the caps 107 being an integral structure. In this embodiment, the tank 1 has two separation chambers 101, each formed by two parallel holes on the cylindrical body 106. Therefore, the cross-section of the cylindrical body 106 is figure-eight shaped. The caps seal both ends of the cylindrical body, thus forming corresponding separation chambers. Both caps are integral structures, which further simplifies the structure of the molecular sieve device. The cap at the top of the cylindrical body 106 is the top cap, and the cap at the bottom of the cylindrical body is the bottom cap. Regarding the connection method between the caps 107 and the cylindrical body, it can be achieved by screw connection, riveting, welding, bonding, or a combination of these methods, as needed, which will not be elaborated here. In this embodiment, the inlet 102 and outlet 103 are respectively located on the corresponding caps. This is because the cylindrical body 106 is cut from a profile, in order to simplify the structure of the cylindrical body. In other embodiments, holes may be drilled in the cylinder 106 to form the inlet and outlet.

[0064] In a preferred embodiment, to facilitate the assembly of the two cylindrical caps 107, the cap clamping screws at both ends of the cylindrical body 106 are used for fixing, and under the clamping action of the clamping screws 3, they seal with the corresponding ends of the cylindrical body 106. Meanwhile, as a further optimization, axially extending ribs 108 are provided on the outer wall of the cylindrical body 106. The ribs 108 have connecting holes corresponding to the clamping screws 3, and the clamping screws 3 engage with the corresponding connecting holes. In this way, both the clamping screws and the ribs form a reinforcing structure for the cylindrical body, which can better protect the cylindrical body.

[0065] Specific implementation of the nitrogen protection system of this utility model:

[0066] like Figures 9-10 As shown, the nitrogen protection system of this utility model includes a gas source (not shown in the figure) and a molecular sieve device 4 connected to the gas source. The gas source can be a vehicle gas source or a separately configured independent gas source. The molecular sieve device is set in a box 5 and is used for nitrogen separation. It is the molecular sieve device of this utility model, which will not be described in detail here.

[0067] Specific implementation of the power battery system of this utility model:

[0068] The power battery system of this utility model includes a battery pack (electric box) and a battery pack nitrogen protection system. The battery pack nitrogen protection system is the nitrogen protection system of this utility model. The structure of the battery pack and its cooperation structure with the battery pack nitrogen protection system are existing technologies and will not be described in detail here.

[0069] Specific implementation method of the new energy vehicle of this utility model:

[0070] The new energy vehicle of this utility model includes a power battery system, wherein the power battery system is the power battery system of this utility model, which will not be described in detail here.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A molecular sieve device, characterized in that, The device includes a tank containing a series molecular sieve assembly. The series molecular sieve assembly includes at least two molecular sieves connected in series and arranged side by side to meet the separation purity requirements for nitrogen. The tank contains separation chambers corresponding to each molecular sieve, and each molecular sieve is arranged in its corresponding separation chamber. The separation chambers corresponding to each molecular sieve in the same series molecular sieve assembly are connected in series.

2. The molecular sieve device according to claim 1, characterized in that, The separation chambers of each molecular sieve in the same series molecular sieve group are connected in series through pipelines provided outside the tank.

3. The molecular sieve device according to claim 1, characterized in that, The separation chambers of each molecular sieve in the same series molecular sieve group are connected in series through channels set in the partition wall between the corresponding separation chambers.

4. The molecular sieve device according to claim 1, 2, or 3, characterized in that, The tank body includes a cylindrical body and cylindrical covers at both ends of the cylindrical body, and the cylindrical covers are an integral structure.

5. The molecular sieve device according to claim 4, characterized in that, The caps at both ends of the cylinder are connected to the cylinder body by clamping screws, and are sealed to the corresponding ends of the cylinder body under the clamping action of the clamping screws.

6. The molecular sieve device according to claim 5, characterized in that, The outer wall of the cylinder is provided with axially extending ribs, and the ribs are provided with connecting holes corresponding to the clamping screws.

7. The molecular sieve device according to claim 4, characterized in that, The cylinder is a cylinder cut from a profile.

8. A nitrogen protection system, comprising a gas source and a molecular sieve device connected to the gas source, characterized in that, The molecular sieve device is the molecular sieve device according to any one of claims 1-7.

9. A power battery system, comprising a battery pack, wherein the battery pack is equipped with a nitrogen protection system, characterized in that, The nitrogen protection system is the nitrogen protection system as described in claim 8.

10. A new energy vehicle, including a power battery system, characterized in that, The power battery system is the power battery system as described in claim 9.

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