Multi-layer battery separator for new energy automobile

Abstract

The utility model discloses a multi-layer battery separator for new energy automobile, including mounting frame, first partition group and second partition group, the inner side of mounting frame is provided with a plurality of mounting groove, the inner side of mounting frame is provided with a plurality of corresponding groove, one side of first partition group is provided with a plurality of second ring groove, one side of second partition group is provided with a plurality of second ring groove, and the other side of second partition group is provided with a plurality of second ring groove. A plurality of first ring grooves are formed in the other side of the first separation group, and first square strips are fixedly mounted at the two ends of the first separation group and the two ends of the second separation group; according to the cylindrical lithium battery, the first separation groups and the second separation groups which are distributed in multiple groups are matched with the first ring grooves and the second ring grooves, so that the utilization of separation spaces of the cylindrical lithium battery is increased, the battery is convenient and tight to install, a plurality of lithium batteries are not in contact with one another, and a certain heat-resistant and flame-retardant effect is achieved; the temperature can be kept relatively stable, the risk of thermal runaway of the lithium battery is reduced, and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of multi-layer battery separators for new energy vehicles, specifically a multi-layer battery separator for new energy vehicles. Background Technology

[0002] New energy vehicles refer to automobiles that use unconventional vehicle fuels as their power source (or use conventional vehicle fuels but employ new onboard power devices), integrating advanced technologies in vehicle power control and drive, resulting in vehicles with advanced technical principles and new technologies and structures. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0003] In the battery installation process of new energy vehicles, cylindrical lithium batteries, as a common type of battery pack, have advantages such as mature manufacturing process, good heat dissipation performance, and excellent cycle performance. They have certain advantages when applied to battery packs for new energy vehicles. Compared with square lithium batteries, they have advantages in terms of slightly lower safety performance and greater thickness. However, cylindrical lithium batteries also have disadvantages such as low space utilization and high system complexity, especially in terms of heat dissipation system and installation method. When applied to small new energy vehicles, the existing battery power mostly uses plate lithium batteries. However, the separation installation of cylindrical lithium batteries does not have multi-layered, convenient, and highly thermally conductive separators, so they cannot be used in conjunction with liquid cooling and air cooling at the same time. Based on this, a multi-layered battery separator for new energy vehicles is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer battery separator for new energy vehicles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer battery separator for new energy vehicles, comprising a mounting frame, a first separator group, and a second separator group. The mounting frame has several mounting grooves on its inner side, and several corresponding grooves on its inner side. One side of the first separator group has several second annular grooves, and the other side of the first separator group has several first annular grooves. First square strips are fixedly installed at both ends of the first and second separator groups, and second square strips are fixedly installed at the other ends of both the first and second separator groups. An inlet is connected to the outer side of the first square strip, and an outlet is connected to the outer side of the second square strip. An aerogel material pad is fixedly installed on the inner side of both the first and second annular grooves. The first separator group includes a ceramic fiber material outer layer, an alumina ceramic layer is fixedly installed inside the ceramic fiber material outer layer, and a boron nitride perforated filling layer is fixedly installed inside the alumina ceramic layer.

[0006] Preferably, the mounting groove and the corresponding groove are linearly and evenly distributed on the inner wall of the mounting frame, and the specifications and dimensions of the corresponding groove are adapted to the specifications and dimensions of the first ring groove and the second ring groove.

[0007] Preferably, the dimensions of the first square strip and the second square strip are adapted to the dimensions of the mounting groove, and the dimensions of the first partition group and the second partition group are adapted to each other.

[0008] Preferably, the first annular groove and the second annular groove are linearly and evenly distributed on the outside of the first partition group, and the specifications of the first annular groove and the specifications of the second annular groove are compatible.

[0009] Preferably, the first and second partition groups are linearly interlaced and uniformly distributed on the inner side of the mounting frame, and the size of the aerogel material pad is one-fifth of the first and second annular grooves.

[0010] Preferably, the aerogel material pad is fixedly installed on the outside of the outer layer of the ceramic fiber material, the boron nitride hollow filling layer is located on the inside of the alumina ceramic layer, the liquid inlet and liquid outlet are respectively connected to the inside of the first square strip and the second square strip, the first square strip and the second square strip are respectively connected to the inside of the boron nitride hollow filling layer, and the internal structure of the first square strip and the second square strip is the same as the structure of the first partition group.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: When in use, the first and second partition groups are linearly installed inside the mounting frame, and the cylindrical lithium battery is placed on the opposite side of the first and second annular grooves. The lithium battery is installed on the opposite side of the second annular groove and is subjected to elastic compression by the aerogel material pad layer, leaving a certain gap. Then, the inlet and outlet are connected to the battery's cooling system. When the silicone oil or coolant flows into the interior of the first partition group, the contact part between the cylindrical lithium battery and the outer layer of the ceramic fiber material leaves a certain small gap with the aerogel material pad layer, which facilitates the airflow to pass through and perform air cooling. After the coolant flows in, the liquid carries away the heat conduction of the alumina ceramic layer and the boron nitride hollow filling layer through the boron nitride hollow filling layer. Combined with the airflow cooling effect, the battery is kept in a relatively stable range, improving the heat dissipation effect and increasing the upper limit of heat dissipation. Moreover, when the weather is cold, the external air cooling inlet is closed to implement internal circulation to maintain the relative temperature. The overall structure of the first and second partition groups can effectively adapt to the battery installation of small new energy vehicles, increase the heat dissipation efficiency, and increase the space utilization effect.

[0012] This invention increases the utilization of the separation space of the cylindrical lithium battery by using multiple distributed first and second partition groups and the fit of the first and second annular grooves. This makes the battery installation convenient and tight, prevents multiple lithium batteries from contacting each other, and has a certain heat resistance and flame retardant effect. It helps to maintain a relatively stable temperature, reduces the risk of thermal runaway of lithium batteries, and increases safety. Attached Figure Description

[0013] Figure 1 This is a front-view stereoscopic structural diagram of the present utility model.

[0014] Figure 2 This is a front-view three-dimensional appearance structural diagram of the first partition group of this utility model.

[0015] Figure 3 This is a top-view cross-sectional schematic diagram of the internal structure of the first partition group of this utility model.

[0016] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Mounting frame; 101. Mounting groove; 102. Corresponding groove; 2. First partition group; 201. Outer layer of ceramic fiber material; 202. Alumina ceramic layer; 203. Boron nitride hollow filling layer; 3. Second partition group; 4. First annular groove; 5. Second annular groove; 6. Liquid inlet; 7. Liquid outlet; 8. First square strip; 9. Second square strip; 10. Aerogel material pad layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4This utility model provides a technical solution: a multi-layer battery separator for new energy vehicles, including a mounting frame 1, a first separator group 2, and a second separator group 3. The mounting frame 1 has several mounting grooves 101 and several corresponding grooves 102 on its inner side. The first separator group 2 has several second annular grooves 5 on one side and several first annular grooves 4 on the other side. First square strips 8 are fixedly installed at both ends of the first separator group 2 and the second separator group 3. Second square strips 9 are fixedly installed at the other ends of the first separator group 2 and the second separator group 3. An inlet 6 is connected to the outer side of the first square strip 8, and an outlet 7 is connected to the outer side of the second square strip 9. An aerogel material pad 10 is fixedly installed on the inner side of the first annular grooves 4 and the second annular grooves 5. The first separator group 2 includes a ceramic fiber material outer layer 201. An alumina ceramic layer 202 is fixedly installed inside the ceramic fiber material outer layer 201, and a boron nitride hollow filling layer 203 is fixedly installed inside the alumina ceramic layer 202.

[0020] The working principle of the above technical solution is as follows: In use, the first partition group 2 and the second partition group 3 are linearly installed inside the mounting frame 1, and the cylindrical lithium battery is placed on the opposite side of the first annular groove 4 and the second annular groove 5. The lithium battery is installed on the opposite side of the first annular groove 4 and the second annular groove 5 and is subjected to elastic compression by the aerogel material pad layer 10, leaving a certain gap. Then, the liquid inlet 6 and the liquid outlet 7 are connected to the battery's cooling system. When silicone oil or coolant flows into the interior of the first partition group 2, the contact part between the cylindrical lithium battery and the outer layer 201 of the ceramic fiber material leaves a certain small gap with the aerogel material pad layer 10. This design facilitates airflow and air cooling. After the cooling liquid flows in, it carries away the conductive heat of the alumina ceramic layer 202 and the boron nitride perforated filling layer 203 through the boron nitride perforated filling layer 203. Combined with the airflow cooling effect, this keeps the battery in a relatively stable range, improving the heat dissipation effect and increasing the upper limit of heat dissipation. Moreover, when the weather is cold, the external air-cooling inlet is closed to implement internal circulation and maintain a relative temperature. The overall structure of the first partition group 2 and the second partition group 3 can effectively adapt to the battery installation of small new energy vehicles, increasing heat dissipation efficiency and space utilization.

[0021] In another implementation scheme, such as Figures 1-4 As shown, the mounting groove 101 and the corresponding groove 102 are linearly and evenly distributed on the inner wall of the mounting frame 1, and the specifications and dimensions of the corresponding groove 102 are adapted to the specifications and dimensions of the first ring groove 4 and the second ring groove 5.

[0022] Mounting slot 101 provides a fixed position for the installation of the first partition group 2 and the second partition group 3, and demonstrates the installation fit position and method of the first partition group 2 and the second partition group 3. The overall structure is relatively stable. Corresponding slot 102 provides a limit for the contact position between the first ring slot 4 and the battery and the battery on the inner side of the mounting frame 1 when the battery is installed in the first ring slot 4 and the second ring slot 5, which facilitates a convenient and stable position example installation method.

[0023] In another implementation scheme, such as Figures 1-4 As shown, the dimensions of the first square strip 8 and the second square strip 9 are compatible with the dimensions of the mounting groove 101, and the dimensions of the first partition group 2 and the second partition group 3 are compatible with each other.

[0024] The first square strip 8 and the second square strip 9 are fitted inside the mounting groove 101, which facilitates positioning and connection with other structures inside the mounting frame 1. The first partition group 2 and the second partition group 3 have the same thickness, the same structure and opposite directions. The overall scheme is to demonstrate how to install, mainly showing the function and effect of the first partition group 2.

[0025] In another implementation scheme, such as Figures 1-4 As shown, the first annular groove 4 and the second annular groove 5 are linearly interleaved and evenly distributed on the outside of the first partition group 2, and the specifications and dimensions of the first annular groove 4 and the second annular groove 5 are matched.

[0026] The uniform distribution of the first annular groove 4 and the second annular groove 5 facilitates battery installation, makes it easier to separate the batteries, reduces the probability of a large number of cells undergoing characteristic variation under uneven operating temperature conditions when using cylindrical lithium batteries, and stabilizes the performance of the structure.

[0027] In another implementation scheme, such as Figures 1-4 As shown, the first partition group 2 and the second partition group 3 are linearly intersecting and uniformly distributed on the inner side of the mounting frame 1, and the size of the aerogel material pad 10 is one-fifth of the size of the first annular groove 4 and the second annular groove 5.

[0028] The first partition group 2 and the second partition group 3 have the same structure but opposite directions. This scheme increases the utilization of the partition space of the cylindrical lithium battery by using multiple distributed first partition groups 2 and second partition groups 3, and cooperating with the first annular groove 4 and the second annular groove 5. It also makes the battery installation convenient and tight, prevents multiple lithium batteries from contacting each other, and has a certain heat resistance and flame retardant effect. It is beneficial to maintain a relatively stable temperature and reduce the risk of thermal runaway of lithium batteries, thus increasing safety.

[0029] In another implementation scheme, such as Figure 3 and Figure 4As shown, the aerogel material pad 10 is fixedly installed on the outside of the ceramic fiber material outer layer 201, the boron nitride hollow filling layer 203 is located on the inside of the alumina ceramic layer 202, the liquid inlet 6 and the liquid outlet 7 are respectively connected to the inside of the first square strip 8 and the second square strip 9, the first square strip 8 and the second square strip 9 are respectively connected to the inside of the boron nitride hollow filling layer 203, and the internal structure of the first square strip 8 and the second square strip 9 is the same as the structure of the first partition group 2.

[0030] The aerogel material pad 10 provides a limiting function for the battery and ensures a certain small gap during battery installation. In addition, the aerogel material pad 10 can also be replaced with other thermally conductive and elastically deformable materials. When the coolant enters the inlet 6, it enters the first square strip 8 and flows into the interior of the boron nitride hollow filling layer 203. Through the thermal conductivity of the alumina ceramic layer 202 and the boron nitride hollow filling layer 203, the ambient temperature inside is kept relatively stable. The coolant flows out through the outlet 7, which facilitates connection to the battery cooling management system and facilitates heat dissipation of the structure. This promotes battery stability in different areas and makes up for some of the disadvantages of cylindrical lithium batteries.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer battery separator for new energy vehicles, comprising a mounting frame (1), a first separator group (2), and a second separator group (3), characterized in that: The mounting frame (1) has several mounting grooves (101) on its inner side and several corresponding grooves (102) on its inner side. The first partition group (2) has several second annular grooves (5) on one side and several first annular grooves (4) on the other side. Both ends of the first partition group (2) and the second partition group (3) are fixedly installed with first square strips (8), and the other ends of the first partition group (2) and the second partition group (3) are fixedly installed with second square strips (9). The outer side of the first square strip (8) is connected to a liquid inlet (6), and the outer side of the second square strip (9) is connected to a liquid outlet (7). Aerogel material pads (10) are fixedly installed on the inner sides of the first annular groove (4) and the second annular groove (5). The first partition group (2) includes a ceramic fiber material outer layer (201). An alumina ceramic layer (202) is fixedly installed inside the ceramic fiber material outer layer (201). A boron nitride hollow filling layer (203) is fixedly installed inside the alumina ceramic layer (202).

2. The multi-layer battery separator for new energy vehicles according to claim 1, characterized in that: The mounting groove (101) and the corresponding groove (102) are linearly and evenly distributed on the inner wall of the mounting frame (1), and the size of the corresponding groove (102) is adapted to the size of the first ring groove (4) and the second ring groove (5).

3. The multi-layer battery separator for new energy vehicles according to claim 1, characterized in that: The dimensions of the first square strip (8) and the second square strip (9) are compatible with the dimensions of the mounting groove (101), and the dimensions of the first partition group (2) and the second partition group (3) are compatible.

4. The multi-layer battery separator for new energy vehicles according to claim 1, characterized in that: The first annular groove (4) and the second annular groove (5) are linearly intersected and evenly distributed on the outside of the first partition group (2), and the specifications of the first annular groove (4) and the specifications of the second annular groove (5) are compatible.

5. A multi-layer battery separator for new energy vehicles according to claim 1, characterized in that: The first partition group (2) and the second partition group (3) are linearly intersecting and evenly distributed on the inner side of the mounting frame (1), and the size of the aerogel material pad (10) is one-fifth of the size of the first annular groove (4) and the second annular groove (5).

6. A multi-layer battery separator for new energy vehicles according to claim 1, characterized in that: The aerogel material pad (10) is fixedly installed on the outside of the ceramic fiber material outer layer (201). The boron nitride hollow filling layer (203) is located on the inside of the alumina ceramic layer (202). The liquid inlet (6) and the liquid outlet (7) are respectively connected to the inside of the first square strip (8) and the second square strip (9). The first square strip (8) and the second square strip (9) are respectively connected to the inside of the boron nitride hollow filling layer (203). The internal structure of the first square strip (8) and the second square strip (9) is the same as the structure of the first partition group (2).

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