An explosion-proof housing and a power battery containing the housing

Abstract

This utility model discloses an explosion-proof housing and a power battery containing the housing, relating to the field of power battery technology. It includes a housing body, a top cover, a temperature sensor, a heat-conducting box, and a second heat dissipation groove. A fan assembly is installed at the bottom of the heat-conducting box, and the fan assembly is electrically connected to a controller via wires. The housing body is equipped with a lifting mechanism for automatic raising and lowering during overheating or cooling. Through the lifting mechanism, this utility model can activate the fan assembly to discharge air from the heat-conducting box cavity to the outside when the battery body experiences localized overheating due to overcharging or over-discharging. Simultaneously, outside air is transported into the heat-conducting box cavity, thus promoting airflow within the cavity. Combined with the heat-conducting plate and heat dissipation plate, this accelerates the cooling efficiency of the battery body, facilitating efficient active cooling of the battery body.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, specifically an explosion-proof housing and a power battery containing the housing. Background Technology

[0002] A power battery is a rechargeable battery designed specifically for electric vehicle drive systems, with high power, high energy density, long life, and strong safety as its core features. The explosion-proof casing used for power batteries is a robust shell equipped with a pre-set pressure relief valve (weak point) and a directional pressure relief path. It is used to house battery cells or modules. When a fault such as thermal runaway occurs inside the battery, causing a surge in pressure, the pressure relief valve ruptures in a directional manner to safely and controllably release the accumulated pressure, high-temperature gas, flames, and ejected materials, guiding them to a safe area. This effectively isolates danger, prevents the entire casing from bursting, protects personnel safety, and prevents the spread of fire and secondary disasters.

[0003] Existing explosion-proof housings for power batteries can controllably release pressure when internal pressure is too high through materials and structures, preventing the housing from bursting. They can also withstand internal and external impacts through reinforcing ribs and other structures. However, during use, when the power battery experiences localized overheating inside the explosion-proof housing due to overcharging or over-discharging, the pressure relief valve only provides a passive response and it is difficult to actively dissipate heat and cool down the internal cavity of the explosion-proof housing. Based on this, an explosion-proof housing and a power battery containing the housing are now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0004] The purpose of this invention is to provide an explosion-proof housing and a power battery containing the housing, so as to solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An explosion-proof enclosure includes an enclosure body, a top cover rotatably connected to the top of the enclosure body, a temperature sensor installed at the bottom of the top cover, the temperature sensor being electrically connected to a controller via a wire, a heat-conducting box fixedly connected to the inner wall of the enclosure body, and a plurality of second heat dissipation grooves vertically and equidistantly formed on the outer wall of the enclosure body, all of the plurality of second heat dissipation grooves penetrating the enclosure body into the inner cavity of the heat-conducting box, a fan assembly installed at the bottom of the heat-conducting box, the fan assembly being electrically connected to the controller via a wire, and a lifting mechanism for automatically raising and lowering in case of overheating or heat dissipation for cooling is provided on the enclosure body;

[0007] The lifting mechanism includes:

[0008] A lifting frame is slidably connected inside the outer shell. The lifting frame is slidably sleeved on the outer wall of the heat conduction box. The outer wall of the lifting frame is vertically and equally spaced with multiple first heat dissipation grooves. The multiple first heat dissipation grooves all penetrate to the inner side of the lifting frame. The multiple first heat dissipation grooves and multiple second heat dissipation grooves are interleaved.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0010] In one alternative embodiment, the lifting mechanism further includes:

[0011] Support components mounted on the main body of the outer casing;

[0012] The support components include:

[0013] Two heat-conducting cylinders are symmetrically arranged inside the outer shell body. Both heat-conducting cylinders are in contact with the lower surface of the heat-conducting box. The fan assembly is located between the two heat-conducting cylinders. The outer walls of both heat-conducting cylinders are fixedly connected to a support frame, and the support frame is fixedly connected to the outer shell body.

[0014] The outer shell body is provided with a first docking component.

[0015] In one alternative embodiment: the first docking component includes:

[0016] Two lifting slide plates are symmetrically arranged inside the main body of the outer shell. The two lifting slide plates are located between two support frames. The fan assembly is located between the two lifting slide plates. A lifting push plate is provided below each of the two lifting slide plates. The lifting push plate is located below the heat conduction cylinder. The lifting push plate is slidably connected to the support frame and fixedly connected to the lifting frame.

[0017] The lifting slide plate is equipped with a second docking component for transmitting signals;

[0018] The lifting push plate is equipped with a moving component for driving the lifting push plate to move.

[0019] In one alternative embodiment, the second docking component includes:

[0020] Two conductive plates are symmetrically arranged between the lifting slide plate and the lifting push plate. One conductive plate is fixedly connected to the bottom end of the lifting slide plate, and the other conductive plate is fixedly connected to the top end of the lifting push plate. Both conductive plates are electrically connected to the controller through wires.

[0021] The lifting slide plate is equipped with a limiting component for limiting the lifting and lowering of the lifting slide plate.

[0022] In one alternative embodiment, the moving component includes:

[0023] A connecting slide rod is fixedly connected to the top of the lifting push plate. The connecting slide rod extends into the interior of the heat-conducting cylinder. A movable push plate is fixedly connected to the top of the connecting slide rod. Both the movable push plate and the connecting slide rod are slidably connected to the heat-conducting cylinder.

[0024] In one alternative embodiment, the limiting component includes:

[0025] Two limiting baffles are symmetrically arranged on the lower surface of the lifting slide plate. The conductive sheet is located between the two limiting baffles. A fixed guide rod is fixedly connected to the top of each of the two limiting baffles. The fixed guide rod passes through the lifting slide plate and is fixedly connected to the heat conduction box. The lifting slide plate is slidably connected to the fixed guide rod.

[0026] A reset component is provided on the fixed guide rod.

[0027] In one alternative: the reset component is a spring sleeved on the outer wall of the fixed guide rod, one end of the spring is in contact with the outer wall of the lifting slide plate, and the other end of the spring is in contact with the outer wall of the outer shell body.

[0028] A power battery includes the aforementioned explosion-proof housing and a battery body located inside a heat-conducting box. Two sets of heat-conducting plates are symmetrically installed on the outer wall of the battery body, and multiple heat dissipation plates are horizontally and equidistantly fixedly connected to the ends of the two sets of heat-conducting plates away from the battery body.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] This invention, through a lifting mechanism, can activate a fan assembly to discharge air from the heat-conducting box cavity to the outside when the battery body's local temperature becomes too high due to overcharging or over-discharging. At the same time, outside air is transported into the heat-conducting box cavity, thereby enabling air circulation within the cavity. Combined with the heat-conducting plate and heat dissipation plate, this accelerates the cooling efficiency of the battery body, facilitating efficient heat dissipation of the battery body. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 This is a schematic diagram of the internal structure of the outer shell of this utility model.

[0033] Figure 3 This is a schematic diagram of the internal structure of the heat-conducting box of this utility model.

[0034] Figure 4 This is a schematic diagram of the internal structure of the lifting frame of this utility model.

[0035] Figure 5This is a schematic diagram of the connection structure between the lifting slide plate and the fixed guide rod of this utility model.

[0036] Figure 6 For the present utility model Figure 4 A magnified schematic diagram of the structure at point B in the diagram.

[0037] Figure reference numerals: 1. Outer shell; 201. Lifting frame; 202. First heat dissipation groove; 203. Lifting slide plate; 204. Conductive sheet; 205. Limiting baffle; 206. Fixed guide rod; 207. Moving push plate; 208. Connecting slide rod; 209. Lifting push plate; 2010. Heat conduction cylinder; 2011. Support frame; 2012. Spring; 3. Temperature sensor; 4. Second heat dissipation groove; 5. Top cover; 6. Fan assembly; 7. Heat conduction box; 8. Battery body; 9. Heat conduction plate; 10. Heat dissipation plate. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] In one embodiment, such as Figures 1-6 As shown, a power battery includes a housing body 1, a top cover 5 rotatably connected to the top of the housing body 1, a temperature sensor 3 installed at the bottom of the top cover 5, the temperature sensor 3 being electrically connected to a controller via wires, a heat conduction box 7 fixedly connected to the inner wall of the housing body 1, multiple ventilation holes opened at the bottom of the heat conduction box 7, two sets of support blocks symmetrically installed at the bottom of the housing body 1, multiple second heat dissipation grooves 4 vertically and equidistantly opened on the outer wall of the housing body 1, the multiple second heat dissipation grooves 4 all penetrating the housing body 1 to the inner cavity of the heat conduction box 7, a fan assembly 6 installed at the bottom of the heat conduction box 7, the fan assembly 6 being electrically connected to the controller via wires, a filter screen installed in the inner cavity of the second heat dissipation grooves 4, an exhaust vent opened at the bottom of the housing body 1 at the fan assembly 6, and a lifting mechanism for automatic lifting and lowering during overheating or heat dissipation cooling on the housing body 1.

[0040] The lifting mechanism includes: a lifting frame 201 that is slidably connected inside the outer shell 1, the lifting frame 201 being slidably sleeved on the outer wall of the heat conduction box 7, and a plurality of first heat dissipation grooves 202 being vertically and equidistantly provided on the outer wall of the lifting frame 201, the plurality of first heat dissipation grooves 202 extending through to the inner side of the lifting frame 201, and the plurality of first heat dissipation grooves 202 and the plurality of second heat dissipation grooves 4 being interleaved with each other.

[0041] It also includes a battery body 8, which is located inside the heat conduction box 7. Two sets of heat conduction plates 9 are symmetrically installed on the outer wall of the battery body 8. Multiple heat dissipation plates 10 are fixedly connected horizontally and equidistantly at the ends of the two sets of heat conduction plates 9 away from the battery body 8.

[0042] In this embodiment, when the battery body 8 experiences excessively high local temperatures due to overcharging or over-discharging, the heat from the battery body 8 can be conducted into the inner cavity of the heat-conducting box 7 via the heat-conducting plate 9 and the heat dissipation plate 10. At this time, the lifting mechanism can gradually align the inner cavity of the heat-conducting box 7 with the port of the second heat dissipation groove 4. The fan assembly 6 is activated by the controller to discharge the air in the inner cavity of the heat-conducting box 7 to the outside. At this time, the outside air enters the inner cavity of the heat-conducting box 7 through the second heat dissipation groove 4. Thus, the flowing air can cool down the heat dissipation plate 10, thereby facilitating efficient heat dissipation of the battery body 8.

[0043] When the temperature of the battery body 8 returns to normal, the above operation is reversed by the lifting mechanism, thereby releasing the heat dissipation and cooling operation of the battery body 8.

[0044] In one embodiment, such as Figures 2-6 As shown, the lifting mechanism also includes a support assembly disposed on the outer casing 1;

[0045] The support assembly includes: two heat-conducting cylinders 2010 symmetrically arranged inside the outer shell body 1, both heat-conducting cylinders 2010 are in contact with the lower surface of the heat-conducting box 7, the fan assembly 6 is located between the two heat-conducting cylinders 2010, and the outer walls of the two heat-conducting cylinders 2010 are fixedly connected to the support frame 2011, which is fixedly connected to the outer shell body 1.

[0046] The outer shell body 1 is provided with a first docking component;

[0047] The first docking assembly includes: two lifting slide plates 203 symmetrically arranged inside the outer shell body 1, the two lifting slide plates 203 being located between two support frames 2011, a fan assembly 6 being located between the two lifting slide plates 203, and a lifting push plate 209 being provided below each of the two lifting slide plates 203, the lifting push plate 209 being located below the heat conduction cylinder 2010, the lifting push plate 209 being slidably connected to the support frame 2011, and the lifting push plate 209 being fixedly connected to the lifting frame 201;

[0048] The lifting slide plate 203 is equipped with a second docking component for transmitting signals;

[0049] The lifting push plate 209 is provided with a moving component for driving the lifting push plate 209 to move;

[0050] The second docking assembly includes two conductive plates 204 symmetrically arranged between the lifting slide plate 203 and the lifting push plate 209. One conductive plate 204 is fixedly connected to the bottom end of the lifting slide plate 203, and the other conductive plate 204 is fixedly connected to the top end of the lifting push plate 209. Both conductive plates 204 are electrically connected to the controller through wires. Through the cooperation of the support assembly, the first docking assembly and the second docking assembly, the inner cavity of the heat conduction box 7 and the port of the second heat dissipation slot 4 can be gradually aligned with each other. The controller starts the fan assembly 6 to discharge the heat in the inner cavity of the heat conduction box 7 to the outside.

[0051] The lifting slide plate 203 is equipped with a limiting component for limiting the lifting of the lifting slide plate 203;

[0052] In one embodiment, such as Figures 2-5 As shown, the movable component includes: a connecting slide rod 208 fixedly connected to the top of the lifting push plate 209, the connecting slide rod 208 extending into the interior of the heat-conducting cylinder 2010, a movable push plate 207 fixedly connected to the top of the connecting slide rod 208, both the movable push plate 207 and the connecting slide rod 208 being slidably connected to the heat-conducting cylinder 2010, ethylene glycol being disposed inside the heat-conducting cylinder 2010, the ethylene glycol being located below the movable push plate 207, a first sealing ring being disposed at the contact position between the heat-conducting cylinder 2010 and the connecting slide rod 208, and a second sealing ring being disposed at the contact position between the movable push plate 207 and the heat-conducting cylinder 2010;

[0053] In one embodiment, such as Figures 2-5 As shown, the limiting component includes: two limiting baffles 205 symmetrically arranged on the lower surface of the lifting slide plate 203, a conductive sheet 204 located between the two limiting baffles 205, and a fixed guide rod 206 fixedly connected to the top of each of the two limiting baffles 205. The fixed guide rod 206 passes through the lifting slide plate 203 and is fixedly connected to the heat conduction box 7. The lifting slide plate 203 is slidably connected to the fixed guide rod 206.

[0054] A reset assembly is provided on the fixed guide rod 206;

[0055] The reset component is a spring 2012 sleeved on the outer wall of the fixed guide rod 206. One end of the spring 2012 is in contact with the outer wall of the lifting slide plate 203, and the other end of the spring 2012 is in contact with the outer wall of the outer shell body 1.

[0056] The above embodiments disclose an explosion-proof housing and a power battery containing the housing. In use, when the battery body 8 experiences excessively high local temperatures due to overcharging or over-discharging, the heat from the battery body 8 can be conducted to the inner cavity of the heat-conducting box 7 via the heat-conducting plate 9 and the heat dissipation plate 10. At this time, the heat can be conducted to ethylene glycol via the heat-conducting box 7 and the heat-conducting cylinder 2010. During this process, when the ethylene glycol expands due to heat, the moving push plate 207, driven by the expansion of the ethylene glycol, drives the lifting push plate 209 to slide and rise along the inner wall of the support frame 2011 via the connecting slide rod 208. At the same time, another conductive sheet 204 rises synchronously under the push of the lifting push plate 209. At this time, the lifting frame 201, driven by the lifting push plate 209, slides and rises along the inner wall of the housing body 1 and the outer wall of the heat-conducting box 7. Simultaneously, the first heat dissipation groove 202 rises synchronously under the drive of the lifting frame 201, thereby gradually aligning the inner cavity of the first heat dissipation groove 202 with the port of the second heat dissipation groove 4.

[0057] When the lifting push plate 209 rises and contacts the lower surface of the lifting slide plate 203, another conductive plate 204, driven by the lifting push plate 209, contacts the first conductive plate 204. At the same time, an electrical signal can be transmitted to the controller through the wire. The controller then starts the fan assembly 6. Simultaneously, the fan assembly 6 draws air from the inner cavity of the heat conduction box 7 through the exhaust vent and ventilation holes and discharges it to the outside. At this time, the outside air enters the inner cavity of the heat conduction box 7 through the second heat dissipation slot 4 and the first heat dissipation slot 202. Simultaneously, the flowing air can perform heat dissipation and cooling operation on the heat dissipation plate 10, so as to actively and efficiently dissipate heat from the battery body 8.

[0058] During this process, ethylene glycol continues to expand due to heat. At this time, the lifting slide plate 203 is pushed by the lifting push plate 209, separates from the outer wall of the limiting baffle 205, and slides along the outer wall of the fixed guide rod 206. At the same time, the lifting slide plate 203 contracts by moving the compression spring 2012.

[0059] When the temperature of the battery body 8 returns to normal, the ethylene glycol gradually contracts by cooling down, thus reversing the above operation. This allows the lifting frame 201 to descend and reset. At this time, the ports of the first heat sink 202 and the second heat sink 4 are misaligned, thereby releasing the heat dissipation and cooling operation on the battery body 8.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An explosion-proof shell, comprising a shell body (1), the top end of the shell body (1) is rotatably connected with a top cover (5), the bottom end of the top cover (5) is installed with a temperature sensor (3), the temperature sensor (3) is electrically connected with a controller through a wire, the inner wall of the shell body (1) is fixedly connected with a heat conduction box (7), the outer wall of the shell body (1) is vertically and equidistantly provided with a plurality of second heat dissipation grooves (4), the plurality of second heat dissipation grooves (4) all penetrate the shell body (1) to the inner cavity of the heat conduction box (7), the bottom end of the heat conduction box (7) is installed with a fan assembly (6), the fan assembly (6) is electrically connected with the controller through a wire, characterized in that, The outer shell body (1) is provided with a lifting mechanism for automatic lifting and lowering when overheating or cooling down; The lifting mechanism includes a lifting frame (201) that is slidably connected inside the outer shell body (1). The lifting frame (201) is slidably sleeved on the outer wall of the heat conduction box (7). The outer wall of the lifting frame (201) is vertically and equidistantly provided with a plurality of first heat dissipation grooves (202). The plurality of first heat dissipation grooves (202) all penetrate to the inner side of the lifting frame (201). The plurality of first heat dissipation grooves (202) and the plurality of second heat dissipation grooves (4) are interleaved.

2. The explosion-proof enclosure according to claim 1, characterized in that, The lifting mechanism also includes: A support assembly is provided on the outer shell body (1); The support assembly includes two heat-conducting cylinders (2010) symmetrically arranged inside the outer shell body (1), both heat-conducting cylinders (2010) are in contact with the lower surface of the heat-conducting box (7), the fan assembly (6) is located between the two heat-conducting cylinders (2010), and the outer walls of the two heat-conducting cylinders (2010) are fixedly connected to a support frame (2011), the support frame (2011) is fixedly connected to the outer shell body (1); The outer shell body (1) is provided with a first docking component.

3. The explosion-proof enclosure according to claim 2, characterized in that, The first docking component includes: Two lifting slide plates (203) are symmetrically arranged inside the outer shell body (1). The two lifting slide plates (203) are located between two support frames (2011). The fan assembly (6) is located between the two lifting slide plates (203). A lifting push plate (209) is provided below each of the two lifting slide plates (203). The lifting push plate (209) is located below the heat conduction cylinder (2010). The lifting push plate (209) is slidably connected to the support frame (2011). The lifting push plate (209) is fixedly connected to the lifting frame (201). The lifting slide plate (203) is provided with a second docking component for transmitting signals; The lifting push plate (209) is provided with a moving component for driving the lifting push plate (209) to move.

4. The explosion-proof enclosure according to claim 3, characterized in that, The second docking component includes: Two conductive plates (204) are symmetrically arranged between the lifting slide plate (203) and the lifting push plate (209). One conductive plate (204) is fixedly connected to the bottom end of the lifting slide plate (203), and the other conductive plate (204) is fixedly connected to the top end of the lifting push plate (209). Both conductive plates (204) are electrically connected to the controller through wires. The lifting slide (203) is provided with a limiting component for limiting the lifting of the lifting slide (203).

5. The explosion-proof enclosure according to claim 3, characterized in that, The moving component includes: A connecting slide rod (208) is fixedly connected to the top of the lifting push plate (209). The connecting slide rod (208) extends into the interior of the heat-conducting cylinder (2010). A movable push plate (207) is fixedly connected to the top of the connecting slide rod (208). Both the movable push plate (207) and the connecting slide rod (208) are slidably connected to the heat-conducting cylinder (2010).

6. The explosion-proof enclosure according to claim 4, characterized in that, The limiting component includes: two limiting baffles (205) symmetrically arranged on the lower surface of the lifting slide plate (203), the conductive sheet (204) being located between the two limiting baffles (205), and a fixed guide rod (206) being fixedly connected to the top of each of the two limiting baffles (205). The fixed guide rod (206) passes through the lifting slide plate (203) and is fixedly connected to the heat conduction box (7). The lifting slide plate (203) is slidably connected to the fixed guide rod (206). A reset assembly is provided on the fixed guide rod (206).

7. The explosion-proof enclosure according to claim 6, characterized in that, The reset component is a spring (2012) sleeved on the outer wall of the fixed guide rod (206). One end of the spring (2012) is in contact with the outer wall of the lifting slide plate (203), and the other end of the spring (2012) is in contact with the outer wall of the outer shell body (1).

8. A power battery, comprising the explosion-proof casing as described in any one of claims 1-7, characterized in that, It also includes a battery body (8), which is located inside the heat conduction box (7). Two sets of heat conduction plates (9) are symmetrically installed on the outer wall of the battery body (8). Multiple heat dissipation plates (10) are fixedly connected horizontally and equidistantly at the ends of the two sets of heat conduction plates (9) away from the battery body (8).

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