Explosion-proof shell of battery pack

Abstract

The utility model relates to an explosion-proof housing of a battery pack, which belongs to the technical field of mobile power supplies and comprises a housing comprising an explosion-proof top wall and an explosion-proof bottom wall. The shell further comprises a mounting side wall I and a mounting side wall II, and the structures of the mounting side wall I and the mounting side wall II are symmetrically distributed; the shell further comprises an emergency rear wall, and the emergency rear wall is connected through a connecting strip. The explosion-proof top wall is provided with heat dissipation explosion-proof reinforcing ribs I; the explosion-proof bottom wall is provided with heat dissipation explosion-proof reinforcing ribs II; the explosion-proof top wall, the explosion-proof bottom wall, the mounting side wall I and the mounting side wall II are combined to form a square, and the explosion-proof top wall, the explosion-proof bottom wall, the mounting side wall I and the mounting side wall II are integrally cast and formed; one end of the explosion-proof door body is hinged to the mounting side wall I, and the other end of the explosion-proof door body is buckled to the mounting side wall II; and meanwhile, a heat dissipation structure is added, so that the heat dissipation efficiency of the battery pack in the use process is improved, and the battery pack is prevented from being on fire.

Description

Technical Field

[0001] The utility model relates to an explosion-proof shell of a battery pack and belongs to the technical field of mobile power supplies. Background Art

[0002] With the widespread application of batteries in electronic products such as electric vehicles, smart phones, and laptops, the issue of battery safety has become increasingly prominent. Battery safety is not only related to the normal use of the product, but is also closely related to the safety of users' lives and property. Damage to the internal structure of the battery is the main cause of battery explosion and fire. When the internal temperature of the battery rises, if it cannot be discharged in time, the internal pressure of the battery will increase, which may eventually lead to serious consequences such as battery explosion and fire.

[0003] According to the automobile battery explosion-proof casing disclosed in publication number CN108134021A, this case involves an automobile battery explosion-proof casing, characterized in that it comprises: a casing, which comprises a semi-cylindrical explosion-proof top, the bottom of the explosion-proof top is connected to a venting section, the side of the explosion-proof top is provided with a first side wall and a second side wall, the bottom of the venting section is connected to a straight panel, and the inner wall of the casing is horizontally provided with three slide rails; and a battery inner box, the outer side of which is provided with slide grooves corresponding to the three slide rails; when the battery encounters a dangerous situation, the first blasting strip will firstly detach from the casing, and the end of the venting section between the two first blasting strips connected to the second side wall will also be broken, and the venting section will be opened by the airflow and connected only to the first side wall, forming a larger air outlet, and the air outlet direction is toward the lower front part of the car, so as not to injure the people of the opposite car and the car.

[0004] The above patent has poor heat dissipation effect. During long-term use, the battery pack is prone to fire and explosion. The overall shape is not suitable for the structure of traditional battery packs, and does not involve liquid heat dissipation structure. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to produce a structural shape that conforms to the assembled battery packs on the market, and at the same time add a heat dissipation structure to improve the heat dissipation efficiency of the battery pack during use and prevent the battery pack from catching fire.

[0006] The utility model discloses an explosion-proof housing for a battery pack, comprising a shell, wherein the shell comprises an explosion-proof top wall and an explosion-proof bottom wall;

[0007] The shell also includes a mounting side wall I and a mounting side wall II, and the structures of the mounting side wall I and the mounting side wall II are symmetrically distributed;

[0008] The housing also includes an emergency rear wall, which is connected by a connecting strip;

[0009] The explosion-proof top wall is equipped with heat dissipation explosion-proof reinforcement ribs Ⅰ;

[0010] The explosion-proof bottom wall is equipped with heat dissipation explosion-proof reinforcement ribs II;

[0011] The explosion-proof top wall, explosion-proof bottom wall, installation side wall I and installation side wall II are combined to form a square shape, and the explosion-proof top wall, explosion-proof bottom wall, installation side wall I and installation side wall II are integrally cast;

[0012] It also includes an explosion-proof door body, one end of which is hinged on the installation side wall I, and the other end of which is buckled on the installation side wall II.

[0013] Furthermore, the emergency rear wall includes a wall body, and at least five safety seams are transversely provided in the wall body, and the safety seams include hollow strips and connecting strips;

[0014] The walls divided by the safety seams are connected by connecting strips;

[0015] Two safety seams are opened at the edge of the wall, and a number of connecting strips are filled in the safety seams.

[0016] Furthermore, a U-shaped cooling medium hole is provided in the explosion-proof top wall, the water inlet of the cooling medium hole is located at the end of the explosion-proof top wall close to the explosion-proof door body, and the water outlet of the cooling medium hole is located in the middle of the explosion-proof top wall;

[0017] The distance between two adjacent cooling medium holes ranges from 170mm to 200mm;

[0018] The radius of the cooling medium hole is in the range of 8mm-12mm.

[0019] Furthermore, the height of the heat dissipation explosion-proof reinforcement rib I is greater than the height of the heat dissipation explosion-proof reinforcement rib II.

[0020] Furthermore, a positioning block is provided on the inner side of the installation side wall I, and a plurality of positioning installation holes are provided on the positioning block.

[0021] Furthermore, lifting rings are provided on both sides of the top of the explosion-proof top wall.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] The utility model discloses an explosion-proof housing for a battery pack, in which the shell is hinged with an explosion-proof door body, a battery pack is placed in the shell, and both ends of the battery pack are connected to the shell by standard parts. The explosion-proof top wall and the explosion-proof bottom wall are larger in area than the mounting side wall I and the mounting side wall II, and heat dissipation explosion-proof reinforcement ribs I and heat dissipation explosion-proof reinforcement ribs II are respectively provided on the surfaces thereof. The emergency rear wall connected by the connecting strip can disconnect the connecting strip when the battery pack bulges and explodes, thereby guiding the explosion direction and avoiding causing greater destructive force. The structural shape of the battery pack on the market is produced, and a heat dissipation structure is added at the same time to improve the heat dissipation efficiency of the battery pack during use and prevent the battery pack from catching fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional embodiment of the utility model Figure Ⅰ ;

[0025] Figure 2 It is the main view of an embodiment of the utility model Figure II ;

[0026] Figure 3 It is a right side view of an embodiment of the utility model;

[0027] Figure 4 yes Figure 3 Sectional view at the middle BB;

[0028] Figure 5 The three-dimensional shell Figure Ⅰ ;

[0029] Figure 6 The three-dimensional shell Figure II ;

[0030] Figure 7 is the front view of the shell;

[0031] Figure 8 yes Figure 7 Sectional view at CC;

[0032] In the figure: 1. Shell; 2. Explosion-proof door; 3. Grouped battery pack;

[0033] 11. Explosion-proof top wall; 12. Explosion-proof bottom wall; 13. Install side wall I; 14. Install side wall II; 15. Emergency rear wall; 16. Positioning block;

[0034] 111. Explosion-proof reinforcement rib I; 112. Explosion-proof reinforcement rib II; 113. U-shaped cooling medium hole; 114. Lifting ring;

[0035] 151. Safety seam;

[0036] 1131, water inlet of cooling medium hole; 1132, water outlet of cooling medium hole;

[0037] 1511. hollow strip; 1512. connecting strip;

[0038] 161.Mounting hole. DETAILED DESCRIPTION

[0039] Example 1

[0040] like Figures 1 to 8 As shown, an explosion-proof housing of a battery pack described in the utility model comprises a housing 1, and the housing 1 comprises an explosion-proof top wall 11 and an explosion-proof bottom wall 12;

[0041] The housing 1 further comprises an installation side wall Ⅰ13 and an installation side wall Ⅱ14, and the structures of the installation side wall Ⅰ13 and the installation side wall Ⅱ14 are symmetrically distributed;

[0042] The housing 1 further comprises an emergency rear wall 15, which is connected via a connecting strip 1512;

[0043] The explosion-proof top wall 11 is provided with heat dissipation explosion-proof reinforcing ribs Ⅰ111;

[0044] The explosion-proof bottom wall 12 is provided with heat dissipation explosion-proof reinforcing ribs II 112;

[0045] The explosion-proof top wall 11, the explosion-proof bottom wall 12, the installation side wall I 13 and the installation side wall II 14 are square in shape, and the explosion-proof top wall 11, the explosion-proof bottom wall 12, the installation side wall I 13 and the installation side wall II 14 are integrally cast;

[0046] It also includes an explosion-proof door body 2, one end of the explosion-proof door body 2 is hinged to the installation side wall I13, and the other end of the explosion-proof door body 2 is buckled to the installation side wall II14.

[0047] The shell 1 is hinged to the explosion-proof door body 2, and a battery pack 3 is placed in the shell 1. Both ends of the battery pack 3 are connected to the shell 1 through standard parts. The explosion-proof top wall 11 and the explosion-proof bottom wall 12 are larger in area than the installation side wall Ⅰ13 and the installation side wall Ⅱ14, and heat dissipation explosion-proof reinforcement ribs Ⅰ111 and heat dissipation explosion-proof reinforcement ribs Ⅱ112 are respectively provided on the surfaces thereof. The emergency rear wall 15 connected by the connecting strip 1512 can disconnect the connecting strip 1512 when the battery pack bulges and explodes, thereby guiding the direction of the explosion to avoid causing greater destructive force.

[0048] like Figure 2 and Figure 6 As shown, as an optimization, the emergency rear wall 15 includes a wall body, and at least five safety seams 151 are transversely opened in the wall body. The safety seams 151 include hollow strips 1511 and connecting strips 1512;

[0049] The walls divided by the safety seam 151 are connected by connecting strips 1512;

[0050] Two safety seams 151 are provided at the edge of the wall, and a plurality of connecting strips 1512 are filled and connected in the safety seams 151 .

[0051] As an optimization, five safety seams 151 are opened in the wall, and the hollow strips 1511 are used to weaken the wall and to support the wall after the explosion. At the same time, the connecting strips 1512 play the role of weak connection and can break by themselves when encountering large deformation and explosion.

[0052] like Figure 8As shown, as an optimization, a U-shaped cooling medium hole 113 is opened in the explosion-proof top wall 11, a cooling medium hole water inlet 1131 is located at the end of the explosion-proof top wall 11 close to the explosion-proof door body 2, and a cooling medium hole water outlet 1132 is located in the middle of the explosion-proof top wall 11;

[0053] The distance between two adjacent cooling medium holes ranges from 170mm to 200mm;

[0054] The radius of the cooling medium hole is in the range of 8mm-12mm.

[0055] The cooling medium hole is used to pass the cooling medium, thereby taking away the heat generated by the battery pack 3, and avoiding explosion caused by heat accumulation;

[0056] As an optimization, the distance between two adjacent cooling medium holes can be 170mm, 185mm or 200mm;

[0057] As an optimization, the radius of the cooling medium hole can be 8 mm, 10 mm or 12 mm.

[0058] like Figure 7 As shown, as an optimization, the height of the heat dissipation and explosion-proof reinforcement rib I111 is greater than the height of the heat dissipation and explosion-proof reinforcement rib II112.

[0059] Due to the characteristics of heat transfer, most of the heat will be transferred to the explosion-proof top wall 11, so a higher explosion-proof reinforcement rib I111 is required to improve the heat dissipation efficiency.

[0060] like Figure 4 and Figure 7 As shown, as an optimization, a positioning block 16 is provided on the inner side of the installation side wall Ⅰ13, and the positioning block 16 has a plurality of positioning installation holes 161.

[0061] Standard parts are provided through both ends of the positioning block 16 and the assembled battery pack 3, so as to play a fixing role.

[0062] like Figure 1 As shown, as an optimization, lifting rings 114 are provided on both sides of the top of the explosion-proof top wall 11 .

[0063] The lifting ring 114 is used to lift and store the structure using an external structure.

[0064] Working process or working principle:

[0065] Place the assembled battery pack 3 in the housing 1, fix the assembled battery pack 3 on the positioning blocks 16 provided on the mounting side wall Ⅰ 13 and the mounting side wall Ⅱ 14 using standard parts, and close the explosion-proof door 2;

[0066] The cooling medium enters the U-shaped cooling medium hole 113 through the water inlet, and most of the heat generated by the battery pack 3 is discharged through the cooling medium, and the remaining heat is released through the explosion-proof reinforcement ribs I 111 and II 112;

[0067] When the assembled battery pack 3 bulges and explodes, the explosion-proof reinforcement ribs I111 and II112 play a role in strengthening the structure. On the other hand, the hollow strips 1511 opened in the emergency rear wall 15 and the resulting connecting strips 1512 are weak connections, which may break during the explosion and bulging process, allowing the energy to be discharged along the emergency rear wall 15, thereby reducing the range of the explosion.

[0068] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. An explosion-proof housing for a battery pack, characterized in that: The invention comprises a shell (1), wherein the shell (1) comprises an explosion-proof top wall (11) and an explosion-proof bottom wall (12); The housing (1) further comprises a mounting side wall I (13) and a mounting side wall II (14), wherein the structures of the mounting side wall I (13) and the mounting side wall II (14) are symmetrically distributed; The housing (1) further comprises an emergency rear wall (15), and the emergency rear wall (15) is connected via a connecting strip (1512); The explosion-proof top wall (11) is provided with heat dissipation explosion-proof reinforcing ribs I (111); The explosion-proof bottom wall (12) is provided with heat dissipation explosion-proof reinforcing ribs II (112); The explosion-proof top wall (11), the explosion-proof bottom wall (12), the installation side wall I (13) and the installation side wall II (14) are combined to form a square shape, and the explosion-proof top wall (11), the explosion-proof bottom wall (12), the installation side wall I (13) and the installation side wall II (14) are integrally cast; It also comprises an explosion-proof door body (2), one end of the explosion-proof door body (2) is hinged to the installation side wall I (13), and the other end of the explosion-proof door body (2) is buckled to the installation side wall II (14).

2. The explosion-proof housing of the battery pack according to claim 1, characterized in that: The emergency rear wall (15) comprises a wall body, in which at least five safety seams (151) are transversely arranged, and the safety seams (151) comprise hollow strips (1511) and connecting strips (1512); The walls divided by the safety seam (151) are connected by connecting strips (1512); Two safety seams (151) are provided at the edge of the wall, and a plurality of connecting strips (1512) are filled and connected in the safety seams (151).

3. The explosion-proof housing of the battery pack according to claim 2, characterized in that: A U-shaped cooling medium hole (113) is provided in the explosion-proof top wall (11), a cooling medium hole water inlet (1131) is located at the end of the explosion-proof top wall (11) close to the explosion-proof door body (2), and a cooling medium hole water outlet (1132) is located in the middle of the explosion-proof top wall (11); The distance between two adjacent cooling medium holes ranges from 170mm to 200mm; The radius of the cooling medium hole is in the range of 8mm-12mm.

4. The explosion-proof housing of the battery pack according to claim 3, characterized in that: The height of the heat dissipation explosion-proof reinforcement rib I (111) is greater than the height of the heat dissipation explosion-proof reinforcement rib II (112).

5. The explosion-proof housing of the battery pack according to claim 4, characterized in that: A positioning block (16) is provided on the inner side of the installation side wall I (13), and a plurality of positioning installation holes (161) are provided on the positioning block (16).

6. The explosion-proof housing of the battery pack according to claim 5, characterized in that: Lifting rings (114) are provided on both sides of the top of the explosion-proof top wall (11).

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