CN221239701U - Flame-retardant box for power battery - Google Patents

Abstract

The utility model discloses a flame-retardant box for a power battery; belongs to the technical field of battery flame retardance; the flame-retardant box comprises a box body and a box cover which are made of fireproof material layers, wherein a positioning structure for fixing each fireproof material layer is arranged outside the box body; at least one accommodating groove for accommodating the battery is formed in the box body along the horizontal direction, and the box cover and the accommodating groove are matched to form an independent flame-retardant chamber for preventing air convection; the side wall of the box body is provided with a wire through hole; the utility model aims to provide a flame-retardant box for a power battery, which has compact structure, high temperature resistance and good use effect; the flame retardant material is used for flame retardance of the power battery.

Description

Flame-retardant box for power battery

Technical Field

The utility model relates to a flame-retardant box, in particular to a flame-retardant box for a power battery.

Background

At present, with the continuous popularization of new energy automobiles and energy storage systems adopting power batteries, the power batteries are increasingly increased, and the recovery treatment of the power batteries becomes an urgent problem. In the energy storage field, the old power battery has obvious cost advantage, but has a very fatal problem that the probability of faults and deflagration is much higher than that of the new power battery, and if the potential safety hazard cannot be treated, the new and old power batteries cannot be used for safe use.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provide the flame-retardant box for the power battery, which has compact structure, high temperature resistance and good use effect.

The technical scheme of the utility model is realized as follows: the flame-retardant box for the power battery comprises a box body and a box cover, wherein the box body and the box cover are made of high-temperature-resistant fireproof material layers, and a positioning structure for fixing each fireproof material layer is arranged outside the box body; at least one accommodating groove for accommodating the battery is formed in the box body along the horizontal direction, and the box cover and the accommodating groove are matched to form an independent flame-retardant chamber for preventing air convection; the side wall of the box body is provided with a wire passing hole.

In the flame-retardant box for the power battery, the positioning structure comprises fastening screws connected with each fireproof material layer, and waterproof patches are coated on the outer side wall of the box along the circumferential direction.

In the flame-retardant box for the power battery, the box body is hinged with the box cover, and the locating piece for fixing the box body and the box cover is arranged at one end far away from the hinged end. Preferably, the positioning member is a snap-on assembly.

In the flame-retardant box for the power battery, the box body comprises a plurality of side plates which are arranged along the circumferential direction to form a closed annular structure and a bottom plate which is arranged at the bottom of the closed annular structure formed by the side plates;

A plurality of partition boards are arranged in the side boards at intervals, and the accommodating groove is formed by matching the side boards, the partition boards and the bottom board; the side plates and the partition plates are fireproof material layers, and the bottom plate is fireproof material layer or fireproof cloth; the box cover is matched with each containing groove in a one-to-one correspondence mode.

In the flame-retardant box for the power battery, the positioning structure comprises a positioning shell, wherein a positioning slot for positioning the fireproof material layers is formed in the positioning shell, a bottom plate is arranged at the inner bottom of the positioning shell, a side plate and a baffle plate are fixed through the positioning slot, and each fireproof material layer is matched to form a single-side open groove body; the opening part of the positioning shell is hinged with a positioning cover matched with the box cover, and the positioning cover is coated on the outer surface of the box cover.

In the flame-retardant box for the power battery, the positioning shell is rectangular, the positioning slots at two ends of the positioning shell are L-shaped, and the L-shaped positioning slots are matched with the positioning shell to form two mutually perpendicular sockets;

The positioning slot positioned in the middle of the positioning shell consists of a slot body in a shape of a Chinese character '[' and vertical flanges at two free ends of the slot body which are integrally formed, the positioning slot is matched with the positioning shell to form three jacks, and two adjacent jacks are mutually vertical; the positioning shell, the positioning slot and the fireproof material layer are matched to form a plurality of mutually independent accommodating grooves.

In the flame-retardant box for the power battery, the heat-conducting plate for heating or radiating is arranged at the inner bottom of the positioning shell.

In the flame-retardant box for the power battery, the bottom of the side wall of the positioning shell is provided with the mounting notch, and the sealing plate internally covered with the fireproof material layer is arranged at the mounting notch.

In the flame-retardant box for the power battery, the positioning shell and the positioning slot are of an integrally formed integral structure, the positioning slot is L-shaped, and the positioning slot at two ends and the positioning slot matched with the positioning shell form two mutually perpendicular sockets;

The positioning slots positioned in the middle of the positioning shell are symmetrically arranged in pairs at intervals, the two positioning slots are matched to form three jacks, and the two adjacent jacks are mutually perpendicular.

In the flame-retardant box for the power battery, the opening parts of the two adjacent accommodating grooves are provided with the isolation structures matched with the box cover; gaps between two adjacent accommodating grooves and the case cover are separated by an isolating structure or are not opposite.

In the flame-retardant box for the power battery, the isolation structure is formed by two isolation planes which are arranged on the upper end surfaces of the partition plates between two adjacent accommodating grooves and are at different heights; the case covers on the two adjacent accommodating grooves are contacted with the corresponding isolation planes to seal the accommodating grooves.

In the flame-retardant box for the power battery, the isolation structure is a partition plate or a partition groove arranged on the partition plate between two adjacent accommodating grooves, and the partition plate or the partition groove is positioned between two adjacent box covers.

In the flame-retardant box for the power battery, the side plate is opposite to the long side of the battery in the corresponding accommodating groove.

In the flame-retardant box for the power battery, the distance between the inner wall of the accommodating groove and the internal discharging battery module is 2-20mm.

After the structure is adopted, the box body and the box cover are matched through the fireproof material layer to form the flame-retardant chamber for preventing air convection, when the interior knocks, the internal pressure is increased to open the gap between the box cover and the box body so as to enable high temperature generated by the battery to quickly overflow, meanwhile, when the internal pressure is reduced, the amount of oxygen entering the box body can be reduced to the greatest extent, and further combustion is prevented, and according to the test, the highest temperature point inside the battery reaches about 1300 ℃ when the battery is in thermal runaway, and the gas discharged out of the box body is not too much, so that the ambient temperature is not too high. When the flame-retardant box is used for protecting various batteries, when the batteries are out of control, the fire disaster caused by igniting surrounding batteries can be effectively avoided, so that the safety usability of the new and old power batteries is greatly improved.

Drawings

The utility model is described in further detail below in connection with the embodiments in the drawings, but is not to be construed as limiting the utility model in any way.

FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;

FIG. 2 is a schematic structural view of embodiment 2 of the present utility model;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

FIG. 4 is a schematic cross-sectional view of embodiment 2 of the present utility model;

FIG. 5 is an enlarged partial schematic view at B in FIG. 4;

FIG. 6 is a schematic structural view of embodiment 3 of the present utility model;

FIG. 7 is an enlarged partial schematic view at C in FIG. 6;

fig. 8 is a schematic structural view of embodiment 4 of the present utility model;

FIG. 9 is a partially enlarged schematic illustration of FIG. 8 at D;

FIG. 10 is a schematic view of the structure of embodiment 5 of the present utility model;

FIG. 11 is a schematic cross-sectional view of the structure of FIG. 10;

FIG. 12 is a schematic view showing the structure of embodiment 6 of the present utility model;

Fig. 13 is a schematic cross-sectional structure of fig. 12.

In the figure: 1. a case; 1a, side plates; 1c, a separator; 1b, a bottom plate; 2. a case cover; 3. a receiving groove; 4. a wire through hole; 5. waterproof plaster; 6. a snap-on assembly; 7. positioning a shell; 7a, positioning a cover; 8. positioning the slot; 9. a heat conductive plate; 10. a sealing plate; 11. an isolation plane; 12. a partition plate; 13. a separation groove.

Detailed Description

Example 1

Referring to fig. 1, the flame-retardant box for the power battery comprises a box body 1 and a box cover 2 which are made of fireproof material layers, wherein the fireproof material layers are made of fireproof materials capable of bearing high temperature of 1300 ℃ in short time.

The case 1 and the case cover 2 are hinged, and a positioning member for fixing the case 1 and the case cover 2 is provided at one end far from the hinged end, and preferably, the positioning member is a snap-lock assembly 6. Of course, other connection structures conventional in the art, such as a snap-on latch, and the like, may be used for the assembly of the case and cover, which are equivalent alternatives as would be readily apparent to one skilled in the art. The snap assembly may take on a variety of structures conventional in the art or similar structures having a resilient function, as the case may be. The spring buckle component can enable the case cover to be unfolded when the battery knocks, pressure is released, and when the pressure is reduced due to no oxygen supply after short-time knocking, the case cover is sealed and reset, so that external air is effectively isolated from entering, and internal combustion points are quickly extinguished due to oxygen deficiency. Of course, through testing, even if a positioning piece without an elastic structure is adopted and a conventional positioning piece is adopted, when the battery knocks, the problem is avoided, but only the adjacent battery is impacted by a certain high temperature, and part of heat enters the accommodating groove of the adjacent battery.

A positioning structure for fixing each fireproof material layer is arranged outside the box body 1; at least one accommodating groove 3 for accommodating batteries is formed in the box body 1 along the horizontal direction, and the box cover 2 and the accommodating groove 3 are matched to form an independent flame-retardant chamber for preventing air convection; the side wall of the box body 1 is provided with a wire through hole 4. When the wire passing hole is threaded, the T-shaped silica gel protective coil is adopted for sealing. Or other sealing materials conventional in the art, such as rubber or mastic, etc. The material is preferably a silica gel material, the surface of the material is carbonized under a short-time high-temperature environment, the inside of the material still maintains the characteristic of silica gel, the sealing effect is still achieved, the material can be sealed when the battery fails to detonate, and meanwhile, after the detonation is finished, the sealing at the wire passing hole is still maintained, so that the air is prevented from entering; when mounting terminals are used, the same may be sealed with a rubber ring, as is commonly practiced in the art.

Further preferably, the space between the inner wall of the accommodating groove 3 and the internal discharge cell module is 2-20mm, preferably 5-15mm. The battery module refers to a battery and accessories connected with the battery, such as a switch, a control panel or a protection plate. By adopting the structure, even when the battery in a certain accommodating groove knocks and has huge power, and larger impact is caused on the partition board, the deformation amplitude of the partition board is insufficient to enable the partition board to be seriously damaged such as fracture and the like due to smaller interval between the accommodating groove and the battery, and when the partition board is deformed, larger gaps are generated between the partition board and the box cover, so that effective pressure release space is provided, and the safety of the battery in the adjacent accommodating groove is further ensured.

In this embodiment, the positioning structure includes fastening screws for connecting each fireproof material layer, and a waterproof patch 5 is coated on the outer side wall of the box 1 along the circumferential direction. The mechanical strength box body is further enhanced through the waterproof adhesive, and meanwhile, the box body is prevented from being wetted.

Example 2

Referring to fig. 2 to 5, the flame retardant case for a power battery according to the present utility model has substantially the same structure as that of embodiment 1, except that the case 1 includes a plurality of side plates 1a arranged in a circumferential direction to form a closed loop structure and a bottom plate 1b arranged at the bottom of the closed loop structure formed by the side plates 1 a; a plurality of partition boards 1c are arranged in the side board 1a at intervals, and the accommodating groove 3 is formed by matching the side board 1a, the partition boards 1c and the bottom board 1b; the side plate 1a and the partition plate 1c are both fireproof material layers, and the bottom plate 1b is a fireproof material layer or fireproof cloth; the box cover 2 is matched with the accommodating grooves 3 in a one-to-one correspondence mode. In the embodiment, the bottom plate is made of fireproof cloth, flame upwards flows during combustion, the bottom is minimally influenced, and a larger space can be formed in the accommodating groove.

Of course, it should be emphasized that the materials of the case body and the case cover can be made of other fireproof materials with high temperature resistance on the premise of having an external positioning structure, so long as the case body and the case cover can effectively isolate high temperature in a short time.

It should be noted that, the box body in this embodiment is in a strip shape and is divided into a plurality of grids by the partition board, and is in a form of a row and a plurality of columns. Of course, as a person skilled in the art, according to the actual needs, the box body can be made large to form a plurality of rows and columns, or the box body with one row and a plurality of columns can be combined to form a plurality of rows and columns, which are equivalent alternatives which can be easily considered by the person skilled in the art.

In this embodiment, the positioning structure includes a positioning housing 7, a positioning slot 8 for positioning a fireproof material layer is provided in the positioning housing 7, a bottom plate 1b is provided at the bottom of the positioning housing 7, a side plate 1a and a partition plate 1c are fixed by the positioning slot 8, and each fireproof material layer is matched to form a slot body with a single side opening; the opening of the positioning shell 7 is hinged with a positioning cover 7a matched with the box cover 2, the positioning cover 7a is coated on the outer surface of the box cover 2, namely one surface facing the accommodating groove is not coated, and the other surfaces are coated in the positioning cover. The positioning shell is provided with a through hole corresponding to the wire passing hole.

The fireproof material layer at the bottom can be placed from the opening part of the positioning shell or can be inserted from the side edge of the positioning shell, and the shape of the fireproof material layer can be changed adaptively according to different placement modes, which is easy to think of a person skilled in the art. When inserted from the side, a mounting notch is arranged at the bottom of the side wall of the positioning shell 7, and a sealing plate 10 internally covered with a fireproof material layer is arranged at the mounting notch.

Of course, the fireproof material layer on the bottom can also be replaced by a fireproof material layer commonly used in the art, such as fireproof cloth, which is an equivalent alternative easily imaginable to the person skilled in the art, according to the concept of the utility model.

Preferably, in this embodiment, the positioning housing 7 is rectangular, and the positioning slots 8 at two ends of the positioning housing 7 are L-shaped, and the L-shaped positioning slots 8 and the positioning housing 7 cooperate to form two mutually perpendicular sockets.

The positioning slot 8 positioned in the middle of the positioning shell 7 consists of a slot body in a shape of a Chinese character '[' and vertical flanges at two free ends of the slot body which are integrally formed, the positioning slot 8 is matched with the positioning shell 7 to form three sockets, and two adjacent sockets are mutually vertical and are in a T shape; the positioning shell 7, the positioning slot 8 and the fireproof material layer are matched to form a plurality of mutually independent accommodating grooves 3. The positioning slot can be fixed on the positioning shell by welding, riveting, screw fixing connection or the like.

Preferably, the side plate 1a is opposite to the long side of the battery in the corresponding receiving groove 3. I.e. opposite the larger end face of the cell. For example, a soft pack battery or a power battery is taken as an example, namely, the soft pack battery or the power battery is opposite to the large surface of each battery inside. This has the effect that, when the battery knocks, a large impact force does not strike the separator and is received by the side plates. The advantage is that even if the explosion power of the battery is huge, the battery can not damage the separator, and the explosion can not affect the battery in the adjacent accommodating groove.

Further preferably, in order to prevent flame or high-temperature gas from channeling into the adjacent accommodating grooves when the battery in one of the accommodating grooves knocks, the opening parts of the two adjacent accommodating grooves 3 are provided with isolation structures matched with the case cover 2; the gaps between two adjacent accommodating grooves 3 and the case cover 2 are separated by a separation structure or are not opposite. In this embodiment, the isolation structures are two isolation planes 11 at different heights, which are arranged on the upper end face of the partition board 1c between two adjacent accommodating grooves 3; the case covers 2 on two adjacent accommodating grooves 3 are contacted with the corresponding isolation planes 11 to seal the accommodating grooves 3.

By arranging the isolation plane, gaps between two adjacent containing grooves and the case cover are not on the same plane, and flame or high-temperature gas can be effectively prevented from entering the adjacent containing grooves when the battery knocks.

Example 3

Referring to fig. 6 and 7, a flame retardant case for a power battery of the present utility model has substantially the same structure as that of embodiment 1, except that a heat conductive plate 9 for heating or radiating heat is provided at the inner bottom of the positioning case 7. The heat-conducting plate is also inserted from the mounting notch in the same way as the bottom layer of fire-resistant material. The structure is suitable for environments and application scenes with high requirements on temperature, and the constant temperature of the battery is better.

Meanwhile, in the present embodiment, the partition structure is a partition plate 12 provided on the partition plate 1c between the adjacent two receiving grooves 3, the partition plate 12 being located between the adjacent two box covers 2.

Example 4

Referring to fig. 8 and 9, the flame retardant box for a power battery of the present utility model has a structure substantially the same as that of the embodiment 2, and is different in that the positioning housing 7 and the positioning slot 8 are integrally formed, the positioning slot 8 is L-shaped, and the positioning slots 8 at two ends and two sockets perpendicular to each other are formed by cooperation with the positioning housing 7;

The positioning slots 8 positioned in the middle of the positioning shell 7 are symmetrically arranged in pairs at intervals, the two positioning slots 8 are matched to form three jacks, and the two adjacent jacks are mutually perpendicular. The positioning shell can be directly cast and formed by the structure, and the assembly cost can be saved.

The isolation structure in this embodiment is the same as that of embodiment 2.

Example 5

Referring to fig. 10 and 11, a flame retardant case for a power battery of the present utility model has substantially the same structure as that of embodiment 4, except that a heat conductive plate 9 for heating or radiating heat is provided at the inner bottom of the positioning case 7. The structure is suitable for environments and application scenes with high requirements on temperature, and the constant temperature of the battery is better.

Meanwhile, in the present embodiment, the isolation structure is a partition groove 13 provided on the partition plate 1c between the adjacent two accommodation grooves 3, the partition groove 13 being located between the adjacent two box covers 2. The gap formed by the separation groove can provide a buffer space for high-speed air flow sprayed out of the gap formed by the containing groove and the box cover, and turbulent flow is formed in the separation groove, so that flame and high-temperature gas can be effectively prevented from flowing into the adjacent containing groove.

Example 6

Referring to fig. 12 and 13, a flame retardant case for a power battery according to the present utility model has substantially the same structure as that of embodiment 5, except that the sealing plate 10 is not required to be separately coated with a fireproof material layer, but the fireproof sealing is formed by skillfully using the cooperation of the bottom fireproof material layer and the end fireproof material layer, and the sealing plate is only a metal plate. Correspondingly, a yielding gap is arranged at the lower end of the end fireproof material layer for the circulation water inlet and outlet of the cooling plate to be communicated with the outside. The effect was the same as in example 5.

The above examples are provided for convenience of description of the present utility model and are not to be construed as limiting the utility model in any way, and any person skilled in the art will make partial changes or modifications to the utility model by using the disclosed technical content without departing from the technical features of the utility model.

Claims (12)

1. The flame-retardant box for the power battery is characterized by comprising a box body (1) and a box cover (2), wherein the box body (1) is made of high-temperature-resistant fireproof material layers, and a positioning structure for fixing each fireproof material layer is arranged outside the box body (1); at least one accommodating groove (3) for accommodating a battery is formed in the box body (1), and the box cover (2) and the accommodating groove (3) are matched to form an independent flame-retardant chamber for preventing air convection; the side wall of the box body (1) is provided with a wire through hole (4).

2. The flame-retardant box for the power battery according to claim 1, wherein the positioning structure comprises fastening screws for connecting each fireproof material layer, and a waterproof patch (5) is coated on the outer side wall of the box body (1) along the circumferential direction.

3. The flame-retardant box for the power battery according to claim 1, wherein the box body (1) and the box cover (2) are hinged, and a positioning piece for fixing the box body (1) and the box cover (2) is arranged at one end far away from the hinged end.

4. The flame retardant box for a power battery according to claim 1, wherein the box body (1) comprises a plurality of side plates (1 a) which are arranged along the circumferential direction to form a closed annular structure and a bottom plate (1 b) which is arranged at the bottom of the closed annular structure formed by each side plate (1 a);

A plurality of partition boards (1 c) are arranged in the side board (1 a) at intervals, and the accommodating groove (3) is formed by matching the side board (1 a), the partition boards (1 c) and the bottom board (1 b); the side plates (1 a) and the partition plates (1 c) are fireproof material layers, and the bottom plate (1 b) is fireproof material layer or fireproof cloth; the box cover (2) is matched with the accommodating grooves (3) in a one-to-one correspondence mode.

5. The flame-retardant box for the power battery according to claim 4, wherein the positioning structure comprises a positioning shell (7), a positioning slot (8) for positioning a fireproof material layer is arranged in the positioning shell (7), a bottom plate (1 b) is arranged at the inner bottom of the positioning shell (7), a side plate (1 a) and a partition plate (1 c) are fixed through the positioning slot (8), and each fireproof material layer is matched to form a slot body with a single side opening;

A positioning cover (7 a) matched with the box cover (2) is hinged at the opening part of the positioning shell (7), and the positioning cover (7 a) is coated on the outer surface of the box cover (2).

6. The flame-retardant box for the power battery according to claim 5, wherein the positioning shell (7) is rectangular, positioning slots (8) at two ends of the positioning shell (7) are L-shaped, and the L-shaped positioning slots (8) are matched with the positioning shell (7) to form two mutually perpendicular sockets;

The positioning slot (8) positioned in the middle of the positioning shell (7) consists of a slot body in a shape of a Chinese character '[' and vertical flanges at two free ends of the slot body which are integrally formed, the positioning slot (8) is matched with the positioning shell (7) to form three sockets, and two adjacent sockets are mutually vertical; the positioning shell (7), the positioning slot (8) and the fireproof material layer are matched to form a plurality of mutually independent accommodating grooves (3).

7. The flame retardant box for a power battery according to claim 6, wherein a heat conducting plate (9) for heating or radiating heat is provided at an inner bottom of the positioning housing (7).

8. The flame-retardant box for power batteries according to claim 4, wherein the opening parts of two adjacent accommodating grooves (3) are provided with isolation structures matched with the box cover (2); gaps between two adjacent accommodating grooves (3) and the box cover (2) are separated by an isolating structure or are not opposite.

9. The flame-retardant box for the power battery according to claim 8, wherein the isolation structure is two isolation planes (11) which are arranged at different heights and are arranged on the upper end face of the partition board (1 c) between two adjacent accommodating grooves (3); the box covers (2) on two adjacent containing grooves (3) are contacted with the corresponding isolation planes (11) to seal the containing grooves (3).

10. The flame retardant box for a power battery according to claim 8, wherein the isolation structure is a partition plate (12) or a partition groove (13) provided on a partition plate (1 c) between two adjacent accommodating grooves (3), and the partition plate (12) or the partition groove (13) is located between two adjacent case covers (2).

11. A flame retardant box for a power battery according to claim 4, wherein the side plate (1 a) is opposed to the long side of the battery in the corresponding accommodation groove (3).

12. The flame-retardant box for the power battery according to claim 1, wherein the distance between the inner wall of the accommodating groove (3) and the internal discharged battery module is 2-20mm.