Shell structure and battery box

Abstract

The utility model discloses a shell structure and a battery box, and relates to the technical field of batteries, the shell structure comprises a lower shell, an upper shell and an explosion-proof structure; a containing cavity with an opening is formed in the lower shell, a through hole is formed in the lower shell, and the through hole is communicated with the containing cavity and the outside; the upper shell seals and covers the opening; the explosion-proof structure comprises an explosion-proof block, a movable part and an elastic part, the explosion-proof block is arranged on the lower shell, one end of the elastic part is connected with one inner wall of the explosion-proof block, the other end of the elastic part is connected with the movable part, the movable part divides the cavity into a first cavity and a second cavity, the first cavity is communicated with the through hole, and under the preset pressure, the second cavity is communicated with the through hole. The movable part moves in the direction away from the through hole so as to increase the size of the first cavity. According to the technical scheme provided by the utility model, the safety of the battery box can be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a housing structure and a battery box. Background Technology

[0002] With the rapid development of electric vehicles and power battery systems, the sealing and safety of the battery box, as a key component, have received widespread attention. During operation, temperature changes or other factors can cause the internal pressure of the battery box to increase. If it remains under high pressure for a prolonged period, it may lead to thermal runaway of the battery, increasing the risk of fire or explosion. Utility Model Content

[0003] The main purpose of this invention is to propose a housing structure and battery box that aims to improve the safety of the battery box.

[0004] To achieve the above objectives, the shell structure proposed in this utility model includes:

[0005] The lower housing has an open receiving cavity and a through hole that connects the receiving cavity to the outside.

[0006] Upper housing, the upper housing sealingly covering the opening; and

[0007] An explosion-proof structure is provided, comprising an explosion-proof block, a movable member, and an elastic member. The explosion-proof block is disposed on the lower housing. One end of the elastic member is connected to an inner wall of the explosion-proof block, and the other end of the elastic member is connected to the movable member. The explosion-proof block forms a cavity, and the movable member divides the cavity into a first chamber and a second chamber. The first chamber communicates with the through hole.

[0008] Under a preset pressure, the movable component moves in a direction away from the through hole to increase the volume of the first chamber.

[0009] In one embodiment, the explosion-proof structure includes two elastic members, one end of each elastic member being connected to an inner wall of the explosion-proof block, and the other end of each elastic member being connected to the movable member.

[0010] In one embodiment, the explosion-proof block has an entrance connecting the cavity and the first chamber, and the entrance is gradually widened from the end of the entrance away from the first chamber to the end of the entrance closer to the first chamber.

[0011] In one embodiment, the lower housing has at least two through holes;

[0012] The housing structure includes at least two explosion-proof structures, each of which corresponds to a through hole.

[0013] In one embodiment, the upper housing is provided with a pressure relief port;

[0014] The housing structure also includes a pressure relief component, which is located at the pressure relief port.

[0015] In one embodiment, the lower housing is formed with a receiving groove, the receiving groove being disposed around the opening;

[0016] The housing structure also includes a sealing gasket, which is disposed within the receiving groove;

[0017] The upper housing covers the receiving groove and is sealed against the sealing gasket.

[0018] In one embodiment, the upper housing is provided with an annular protrusion, which is disposed corresponding to the receiving groove and abuts against the sealing gasket.

[0019] In one embodiment, the lower housing is provided with a plurality of first through holes;

[0020] The sealing gasket is provided with multiple second through holes;

[0021] The upper housing is provided with multiple third through holes;

[0022] The housing structure includes a plurality of locking screws, each of which passes through a first through hole and a second through hole in sequence and is screwed into the third through hole.

[0023] In one embodiment, the housing structure further includes a charging / discharging interface, which is located in the lower housing.

[0024] This utility model also proposes a battery box, the battery box comprising:

[0025] Shell structure, as described above; and

[0026] A battery, wherein the battery is disposed within the receiving cavity.

[0027] In the technical solution of this utility model, the receiving cavity is used to place the battery. The movable part divides the cavity of the explosion-proof block into a first chamber and a second chamber. The first chamber is connected to the through hole, that is, the first chamber is connected to the receiving cavity. When the pressure in the receiving cavity increases to the preset pressure, the movable part will move under the action of pressure, so that the volume of the first chamber increases and the volume of the second chamber decreases. In this way, the pressure in the receiving cavity can be reduced, avoiding safety accidents caused by excessive pressure in the receiving cavity, and improving safety. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 A schematic diagram of an embodiment of the shell structure provided by this utility model;

[0030] Figure 2 An exploded view of an embodiment of the shell structure provided by this utility model;

[0031] Figure 3 A schematic diagram of an embodiment of the explosion-proof structure provided by this utility model;

[0032] Figure 4 This is a schematic diagram of the upper shell structure.

[0033] Explanation of icon numbers:

[0034] 1000. Shell structure; 1. Lower shell; 11. Receiving groove; 12. Through hole; 13. First through hole; 2. Sealing gasket; 21. Second through hole; 3. Upper shell; 31. Pressure relief port; 32. Annular protrusion; 33. Third through hole; 4. Explosion-proof structure; 41. Explosion-proof block; 411. Inlet; 42. Moving part; 43. Elastic part; 44. Telescopic rod; 5. Pressure relief part; 6. Locking screw; 7. Charging and discharging interface.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] 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 scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] This utility model proposes a shell structure 1000.

[0040] Please see Figures 1 to 3 In one embodiment of this utility model, the housing structure 1000 includes a lower housing 1, an upper housing 3, and an explosion-proof structure 4; the lower housing 1 forms an accommodating cavity with an opening, and the lower housing 1 has a through hole 12 that connects the accommodating cavity to the outside; the upper housing 3 seals and covers the opening; the explosion-proof structure 4 includes an explosion-proof block 41, a movable member 42, and an elastic member 43. The explosion-proof block 41 is disposed on the lower housing 1, one end of the elastic member 43 is connected to an inner wall of the explosion-proof block 41, and the other end of the elastic member 43 is connected to the movable member 42. The explosion-proof block 41 forms a cavity, and the movable member divides the cavity into a first chamber 411 and a second chamber 412. The first chamber 411 is connected to the through hole 12. Under a preset pressure, the movable member 42 moves in a direction away from the through hole 12 to increase the volume of the first chamber 411.

[0041] The elastic element 43 can be a spring, elastic sleeve or other elastic structure, and the movable element 42 fits against the inner wall of the cavity during installation.

[0042] The preset pressure is a pressure value higher than the normal pressure inside the receiving cavity. A battery is placed inside the receiving cavity. When the battery is working, factors such as heat generation or chemical reactions cause the pressure inside the receiving cavity to increase. When the pressure inside the receiving cavity increases to the preset pressure, since the pressure inside the first chamber 411 is the same as the pressure inside the receiving cavity, a pressure difference will exist between the first chamber 411 and the second chamber 412. Under the action of this pressure difference, the movable component 42 will move, causing the volume of the first chamber to increase and the volume of the second chamber to decrease. The movable component 42 is preferably a plate-like structure, allowing for relatively stable movement.

[0043] In the technical solution of this utility model, the receiving cavity is used to place the battery. The movable part divides the cavity of the explosion-proof block into a first chamber and a second chamber. The first chamber is connected to the through hole, that is, the first chamber is connected to the receiving cavity. When the pressure in the receiving cavity increases to the preset pressure, the movable part will move under the action of pressure, so that the volume of the first chamber increases and the volume of the second chamber decreases. In this way, the pressure in the receiving cavity can be reduced, avoiding safety accidents caused by excessive pressure in the receiving cavity, and improving safety.

[0044] To stabilize the pressure relief, please refer to one embodiment of this utility model. Figure 3 The explosion-proof structure 4 includes two elastic elements 43. One end of each elastic element 43 is connected to an inner wall of the explosion-proof block 41, and the other end of each elastic element 43 is connected to the movable element 42. The design of the two elastic elements 43 can provide a more uniform force distribution, thereby more stably controlling the movement of the movable element 42 when the pressure increases, and reducing structural damage caused by local stress concentration. Preferably, the two elastic elements 43 are symmetrically arranged about the geometric center of the movable element 42, so that the two elastic elements 43 are subjected to uniform force.

[0045] Furthermore, in one embodiment of this utility model, please refer to... Figure 3 The explosion-proof structure 4 also includes a telescopic rod 44. One end of the telescopic rod 44 is connected to an inner wall of the explosion-proof block 41, and the other end is connected to the movable member 42. An elastic member 43 is sleeved on the telescopic rod 44. By setting the telescopic rod 44, the elastic member 43 can deform along the telescopic length direction of the telescopic rod 44 during deformation, thereby limiting the position of the elastic member 43 relative to the movable member 42, and thus limiting the stroke of the movable member 42. For example, when the movable member 42 is a plate-like structure, the telescopic rod 44 can be set at the geometric center of the movable member 42. In this way, when the pressure in the first chamber 411 increases, the movable member 42 will not move towards the first chamber 411 at one end and the second chamber 412 at the other end, but will move in the direction of the stroke of the movable member 42 as a whole. In addition, two elastic members 43 symmetrically arranged along the geometric center of the movable member 42 can be set, and two telescopic rods 44 are set accordingly, which can better limit the stroke of the movable member 42.

[0046] Furthermore, in one embodiment of this utility model, please refer to... Figure 3 The explosion-proof block 41 has an inlet 411 connecting the cavity and the first chamber 411. From the end of the inlet 411 away from the first chamber 411 to the end of the inlet 411 closer to the first chamber 411, the inlet 411 gradually widens. The gradually widening design of the inlet 411 helps to disperse the gas in the cavity to different positions of the movable member 42 after passing through the through hole when the pressure in the cavity increases. This avoids the movable member 42 from tilting relative to the outer wall of the lower housing 1 due to excessive local stress, thus preventing pressure relief.

[0047] To distribute pressure, in one embodiment of this utility model, please refer to... Figure 1 and Figure 2 The lower housing 1 has at least two through holes 12; the housing structure 1000 includes at least two explosion-proof structures 4, each explosion-proof structure 4 corresponding to one through hole 12. More explosion-proof structures 4 correspond to more first chambers 411, so that when the pressure inside the chamber increases to a preset pressure, the volume of multiple first chambers 411 can increase, resulting in stronger pressure relief capacity. The multiple through holes 12 can be distributed on different sides of the lower housing 1, so that when the pressure increases, the gas inside the chamber can flow in different directions, better dispersing the pressure inside the chamber. At the same time, the design of multiple through holes 12 and explosion-proof structures 4 provides safety redundancy; even if one or more explosion-proof structures 4 fail, the other structures can still function, ensuring the overall safety of the housing structure 1000.

[0048] Furthermore, the upper housing 3 is provided with a pressure relief port 31; the housing structure 1000 also includes a pressure relief component 5, which is disposed at the pressure relief port 31. The pressure relief port 31 is designed to automatically open when the internal pressure exceeds a safety threshold, releasing excessive pressure and preventing the housing from rupturing or exploding due to excessive pressure. Specifically, in one embodiment of this utility model, the pressure relief component 5 is an explosion-proof valve, which can automatically open and release pressure when the internal pressure of the receiving cavity exceeds a set value; in other embodiments, the pressure relief component 5 is a rupture disc, which ruptures to release pressure when the internal pressure of the receiving cavity is too high.

[0049] Furthermore, in one embodiment of this utility model, the lower housing 1 forms a receiving groove 11, which is arranged around the opening; the housing structure 1000 also includes a sealing gasket 2, which is disposed within the receiving groove 11; the upper housing 3 covers the receiving groove 11 and is in sealing contact with the sealing gasket 2. By providing the sealing gasket 2 within the receiving groove, and simultaneously sealing the upper housing 3 with the sealing gasket 2, the sealing performance of the housing structure 1000 is ensured, effectively preventing external substances (such as water, dust, etc.) from entering the receiving cavity and ensuring the stability of the internal environment.

[0050] To enhance the sealing effect, please refer to one embodiment of this utility model. Figure 4The upper housing 3 is provided with an annular protrusion 32, which corresponds to the receiving groove 11 and abuts against the sealing gasket 2. The annular protrusion 32 can provide additional contact area and pressure, thereby enhancing the sealing effect of the sealing gasket 2. The annular protrusion 32 also helps to form a stable support structure between the upper housing 3 and the sealing gasket 2, reducing displacement caused by pressure changes or temperature fluctuations, thereby improving the stability and reliability of the entire housing structure 1000. The sealing gasket 2 is made of silicone, which has good waterproof and sealing performance. Using it as a sealing element is more conducive to improving the sealing performance. The shape of the annular protrusion 32 is the same as the shape of the receiving groove 11, so that the annular protrusion 32 can be inserted into the receiving groove 11.

[0051] Furthermore, in one embodiment of this utility model, please refer to... Figure 2 The lower housing 1 has multiple first through holes 13; the sealing gasket 2 has multiple second through holes 21; the upper housing 3 has multiple third through holes 33; the housing structure 1000 includes multiple locking screws 6, each locking screw 6 passing through a first through hole 13 and a second through hole 21 sequentially and being screwed into a third through hole 33. The multiple second through holes 21 on the sealing gasket 2 correspond to the first through holes 13 of the lower housing 1 and the third through holes 33 of the upper housing 3, ensuring good contact between the sealing gasket 2 and the housing, thereby improving the overall sealing performance. In addition, in other embodiments, the locking screw 6 may also pass through the first through hole 13, the second through hole 21 and the third through hole 33 sequentially and then be screwed into a nut.

[0052] For ease of use, please refer to one embodiment of this utility model. Figure 1 The housing structure 1000 also includes a charging / discharging interface 7, which is located in the lower housing 1. Positioning the charging / discharging interface 7 in the lower housing 1 facilitates direct access and connection of charging / discharging devices for the user, improving ease of use.

[0053] This utility model also proposes a battery box, which includes the aforementioned housing structure 1000 and a battery. The specific structure of the housing structure 1000 is as described in the above embodiments. Since this battery box adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. The battery is disposed in the receiving cavity of the housing structure 1000. Specifically, the battery can be disposed in the receiving cavity in the form of a battery pack or in the form of a battery module, depending on the requirements. At the same time, the shape of the receiving cavity is correspondingly set to adapt to different installation requirements.

[0054] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A shell structure, characterized in that, include: The lower housing has an open receiving cavity and a through hole that connects the receiving cavity to the outside. Upper housing, the upper housing sealingly covering the opening; as well as An explosion-proof structure is provided, comprising an explosion-proof block, a movable member, and an elastic member. The explosion-proof block is disposed on the lower housing. One end of the elastic member is connected to an inner wall of the explosion-proof block, and the other end of the elastic member is connected to the movable member. The explosion-proof block forms a cavity, and the movable member divides the cavity into a first chamber and a second chamber. The first chamber communicates with the through hole. Under a preset pressure, the movable component moves in a direction away from the through hole to increase the volume of the first chamber.

2. The shell structure as described in claim 1, characterized in that, The explosion-proof structure includes two elastic elements, one end of each elastic element is connected to an inner wall of the explosion-proof block, and the other end of each elastic element is connected to the movable element.

3. The shell structure as described in claim 1, characterized in that, The explosion-proof block has an entrance connecting the cavity and the first chamber, and the entrance gradually widens from the end away from the first chamber to the end closer to the first chamber.

4. The shell structure as described in claim 1, characterized in that, The lower housing has at least two through holes; The housing structure includes at least two explosion-proof structures, each of which corresponds to a through hole.

5. The shell structure as described in any one of claims 1 to 4, characterized in that, The upper housing is provided with a pressure relief port; The housing structure also includes a pressure relief component, which is located at the pressure relief port.

6. The shell structure as described in any one of claims 1 to 4, characterized in that, The lower housing has a receiving groove, which is arranged around the opening; The housing structure also includes a sealing gasket, which is disposed within the receiving groove; The upper housing covers the receiving groove and is sealed against the sealing gasket.

7. The shell structure as described in claim 6, characterized in that, The upper housing is provided with an annular protrusion, which is arranged corresponding to the receiving groove and abuts against the sealing gasket.

8. The shell structure as described in claim 6, characterized in that, The lower housing is provided with multiple first through holes; The sealing gasket is provided with multiple second through holes; The upper housing is provided with multiple third through holes; The housing structure includes a plurality of locking screws, each of which passes through a first through hole and a second through hole in sequence and is screwed into the third through hole.

9. The shell structure as described in any one of claims 1 to 4, characterized in that, The housing structure also includes a charging / discharging interface, which is located in the lower housing.

10. A battery box, characterized in that, include: The shell structure as described in any one of claims 1 to 9; and A battery, which is disposed within the receiving cavity.

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