Non-return battery pack cooling joint

Abstract

The utility model discloses a non-return battery pack cooling joint, which belongs to the technical field of battery production and comprises an interface shell, one end of the interface shell is fixedly connected to a water outlet of a cold plate, and a cooling water circulation channel communicated to a water pipe joint is arranged in the interface shell; and the self-sealing device comprises a core body which is elastically connected in the interface shell, and the core body elastically moves in the interface shell so as to open and close the cooling water circulation channel. According to the non-return battery pack cooling joint provided by the invention, when the cooling water interface on the cold plate fails, the core body elastically moves in the interface shell to close the cooling water circulation channel in the interface shell, so that the purpose of timely plugging the interface is achieved, and the risk of short circuit in the battery caused by overflow of cooling water is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, and more specifically to a non-return type battery pack cooling joint. Background Art

[0002] At present, the mainstream thermal management method for battery packs on the market is liquid cooling. The liquid cooling system is generally composed of a cold plate, a cooling water outlet, pipes, and an inlet and outlet assembly. Battery packs that use liquid cooling are at risk of cooling water pipe joints falling off or sealing failure during long-term use. Once the coolant leaks, it is easy to cause insulation problems in the battery pack, and even cause internal short circuits due to the coolant, causing thermal runaway of the battery cell, followed by fire and explosion of the battery pack, which seriously threatens the safety of the occupants. For this reason, when the water pipe joint falls off, the joint at the cold plate outlet needs to be adaptively self-sealed to prevent leakage from posing a risk to battery safety. Utility Model Content

[0003] In view of the problem in the prior art that the water pipe joint falls off and the cooling water leaks out of the cold plate outlet, threatening the safety of the battery, the present invention provides a non-returnable battery pack cooling joint, which can achieve self-sealing of the cold plate outlet when the water pipe joint falls off, thereby preventing cooling water leakage and improving the safety of battery use.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0005] The utility model discloses a non-return type battery pack cooling joint, comprising:

[0006] An interface shell, one end of which is fixedly connected to the water outlet of the cold plate, and a cooling water circulation channel leading to the water pipe joint is provided inside the interface shell; a self-sealing device, including a core body elastically connected to the interface shell, and the core body elastically moves inside the interface shell to open and close the cooling water circulation channel. The non-returnable battery pack cooling connector provided in the present application is used for the core body to elastically move inside the interface shell to close the cooling water circulation channel inside the interface shell when the cooling water interface on the cold plate fails, so as to achieve the purpose of timely blocking this interface and avoid the risk of internal short circuit of the battery caused by overflow of cooling water.

[0007] In a non-returnable battery pack cooling connector provided in the present application, further, the interface shell includes a first tube body and a second tube body connected end to end and formed integrally, and the second tube body is a tapered tube.

[0008] In a non-returnable battery pack cooling joint provided in the present application, further, the self-sealing device includes a fixing sleeve, the fixing sleeve has a connecting pipe with one end fixedly connected to the water outlet of the cold plate, and a first retaining ring fixed to the outer ring of the connecting pipe.

[0009] In a non-returnable battery pack cooling connector provided in the present application, further, the first sleeve and the second sleeve, the first sleeve is connected to the water outlet of the cold plate, and a spring is sleeved on the outer ring of the second sleeve, and one end of the spring is pressed against the first retaining ring.

[0010] In a non-returnable battery pack cooling connector provided in the present application, further, the second sleeve is provided with a first opening penetrating through the wall of the second sleeve.

[0011] In a non-returnable battery pack cooling connector provided in the present application, further, the core body includes a movable tube and a second retaining ring fixedly connected to the movable tube, and the second retaining ring is used to press one end of the spring to provide a restoring elastic force for the core body.

[0012] In a non-returnable battery pack cooling connector provided in the present application, further, the movable tube includes a third sleeve, the third sleeve is provided with a tube groove, and the tube groove is sleeved on the outer ring of the second sleeve to enable the core to move axially along the second sleeve.

[0013] In a non-returnable battery pack cooling connector provided in the present application, further, the movable tube includes a fourth sleeve, an annular groove is provided on the outer ring of the fourth sleeve, a sealing ring is connected to the annular groove, and when the sealing ring is pressed against the inner wall of the second tube body, the cooling water flow channel is closed.

[0014] In a non-returnable battery pack cooling connector provided in the present application, further, the fourth sleeve is provided with a second opening penetrating through the tube wall of the fourth sleeve.

[0015] In a non-return type battery pack cooling connector provided in the present application, further, a protrusion for snap-fitting and connecting the water pipe connector is provided on the outer ring of the first tube body.

[0016] When the water pipe joint is not connected to the battery pack cooling interface: the core moves axially along the second sleeve under the action of the spring, and makes the core press against the end of the first tube body. At this time, the sealing ring on the fourth sleeve presses against the conical inner wall of the second tube body to complete the sealing action, and the cooling water is blocked at the sealing ring. In this state, the end of the fourth sleeve extends outward from the mouth of the third sleeve for a distance. When the water pipe joint is connected to the battery pack cooling interface: the water pipe joint squeezes the end of the fourth sleeve, so that the entire core moves axially along the second sleeve toward the cold plate, and then the sealing ring on the fourth sleeve breaks away from the conical surface of the inner wall of the second tube body, forming a channel for cooling water to flow. The cooling water circulation path is: cold plate outlet-inside of the connecting tube-first opening-outside of the connecting tube-second tube body-third tube body-second opening-inside the fourth sleeve-water pipe.

[0017] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0018] The utility model discloses a non-return type battery pack cooling joint, including an interface shell, one end of which is fixedly connected to the water outlet of the cold plate, and a cooling water circulation channel leading to the water pipe joint is provided inside the interface shell; a self-sealing device includes a core body elastically connected to the interface shell, and the core body elastically moves in the interface shell to open and close the cooling water circulation channel. The non-return type battery pack cooling joint provided by the present application is used for when the cooling water interface on the cold plate fails, the core body elastically moves in the interface shell, closes the cooling water circulation channel in the interface shell, and achieves the purpose of timely blocking the interface, avoiding the risk of internal short circuit of the battery caused by overflow of cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the explosion of the battery pack cooling connector of the non-return type of the present application;

[0020] Figure 2 This is a schematic cross-sectional view of a non-return type battery pack cooling connector when the cooling water circulation channel of the present application is opened;

[0021] Figure 3 This is a schematic cross-sectional view of a non-return type battery pack cooling connector when the cooling water circulation channel of the present application is closed;

[0022] Description of labels:

[0023] 100, interface housing; 110, cooling water flow channel; 120, first tube body; 130, second tube body; 140, third tube body; 150, protrusion;

[0024] 200, cold plate;

[0025] 300, self-sealing device; 310, fixing sleeve; 311, connecting pipe; 3111, first sleeve; 3112, second sleeve; 3113, first opening; 312, first retaining ring;

[0026] 320, core body; 321, moving tube; 3211, third sleeve; 3212, fourth sleeve; 3213, second opening; 322, second retaining ring; 323, pipe groove; 324, annular groove; 325, sealing ring;

[0027] 330, spring;

[0028] 400. Water pipe joint. DETAILED DESCRIPTION

[0029] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0030] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification, so as to be understood and read by people familiar with this technology, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of narration, and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationship should also be regarded as the scope that the present invention can be implemented without substantially changing the technical content. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described here.

[0031] like Figure 1 As shown, a non-return type battery pack cooling connector of the present invention includes an interface shell 100, one end of which is fixedly connected to the water outlet of the cold plate 200, and a cooling water circulation channel 110 leading to the water pipe connector 400 is provided inside the interface shell 100; a self-sealing device 300 includes a core 320 elastically connected to the interface shell 100, and the core 320 elastically moves in the interface shell 100 to open and close the cooling water circulation channel 110. The non-return type battery pack cooling connector provided by the present application is used for the core 320 to elastically move in the interface shell 100 to close the cooling water circulation channel 110 in the interface shell 100 when the cooling water interface on the cold plate 200 fails, so as to achieve the purpose of timely blocking this interface and avoid the risk of internal short circuit of the battery caused by overflow of cooling water.

[0032] like Figure 2-3As shown, the interface housing 100 is a metal tube or a plastic tube, which includes a first tube body 120 and a second tube body 130, which are integrally formed and internally connected to each other. The first tube body 120 is cylindrical, and one end of which is sealed and fixed at the cooling water outlet of the cold plate 200. The cooling water in the cold plate 200 flows out from the outlet and enters the interface housing 100. A protrusion 150 is provided on the outer wall of the first tube body 120, and the shape of this protrusion 150 can be a circular convex ring or a convex hull, as long as it can play a role in mutual engagement with the barb on the water pipe connector 400 to prevent the water pipe connector 400 from falling off the first tube body 120. The second tube body 130 is a tapered tube, and its end is fixedly connected to the first tube body 120. The tapered tube is used to cooperate with the self-sealing device 300 to play the role of opening and closing the interface. One end of the second tube body 130 is also fixedly connected to the third tube body 140 , which is a cylindrical tube and plays a limiting role.

[0033] like Figure 2-3 As shown, the self-sealing device 300 includes a fixed sleeve 310, a spring 330, a core 320 and a sealing ring 325. The fixed sleeve 310 has a connecting pipe 311, and a first retaining ring 312 is fixed on the outer ring of the connecting pipe 311. The first retaining ring 312 divides the connecting pipe 311 into a first sleeve 3111 and a second sleeve 3112. The first retaining ring 312 is provided with a plurality of through holes for connecting screws, and the first retaining ring 312 is fixed to the cold plate 200 by screw connection, thereby fixing the entire fixed sleeve 310. The first sleeve 3111 is inserted into the water outlet of the cold plate 200. The second sleeve 3112 of the connecting pipe 311 is provided with a first opening 3113, and cooling water flows from the inside of the connecting pipe 311 to the outside of the connecting pipe 311 through the first opening 3113.

[0034] like Figure 2-3 As shown, the spring 330 is sleeved on the outer ring of the second sleeve 3112 of the connecting pipe 311 , with one end of the spring 330 pressing against the first retaining ring 312 and the other end pressing against the core 320 .

[0035] like Figure 2-3As shown, the core 320 includes a moving tube 321 and a second retaining ring 322, the second retaining ring 322 is fixed on the outer ring of the moving tube 321, and one end of the spring 330 is pressed against the second retaining ring 322. The second retaining ring 322 divides the moving tube 321 into a third sleeve 3211 and a fourth sleeve 3212. A tube groove 323 is provided in the third sleeve 3211, and the tube groove 323 is used to be sleeved on the outer ring of the second sleeve 3112, so that the core 320 can slide axially along the second sleeve 3112. An annular groove 324 is provided on the fourth sleeve 3212, and a sealing ring 325 is connected in the annular groove 324, and the sealing ring 325 is an O-type sealing ring 325. A second opening 3213 is also provided on the fourth sleeve 3212, and the second opening 3213 penetrates the wall of the fourth sleeve 3212, so that cooling water can flow from the outside of the fourth sleeve 3212 into the fourth sleeve 3212 through the second opening 3213.

[0036] like Figure 3 As shown, when the water pipe connector 400 is not connected to the battery pack cooling interface:

[0037] The core 320 moves axially along the second sleeve 3112 under the action of the spring 330, and makes the core 320 press against the end of the first tube 120. At this time, the sealing ring 325 on the fourth sleeve 3212 presses against the conical inner wall of the second tube 130 to complete the sealing action, and the cooling water is blocked at the sealing ring 325. In this state, the end of the fourth sleeve 3212 extends outward from the mouth of the third sleeve 3211 for a distance.

[0038] like Figure 2 As shown, when the water pipe connector 400 is connected to the battery pack cooling interface:

[0039] The water pipe joint 400 squeezes the end of the fourth sleeve 3212, so that the entire core 320 moves axially along the second sleeve 3112 toward the cold plate 200, thereby causing the sealing ring 325 on the fourth sleeve 3212 to separate from the conical surface of the inner wall of the second tube body 130, forming a channel for cooling water to flow. The flow path of the cooling water flow channel 110 is: the water outlet of the cold plate 200 - the inside of the connecting pipe 311 - the first opening 3113 - the outside of the connecting pipe 311 - the inside of the second tube body 130 - the inside of the third tube body 140 - the second opening 3213 - the inside of the fourth sleeve 3212 - the water pipe joint 400.

[0040] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A non-returnable battery pack cooling connector, characterized in that: include An interface shell (100), one end of the interface shell (100) being fixedly connected to the water outlet of the cold plate (200), and a cooling water circulation channel (110) leading to a water pipe joint (400) being provided inside the interface shell (100); The self-sealing device (300) comprises a core (320) elastically connected to the interface shell (100), wherein the core (320) elastically moves in the interface shell (100) to open and close the cooling water circulation channel (110).

2. The non-returnable battery pack cooling connector according to claim 1, characterized in that: The interface housing (100) comprises a first tube body (120) and a second tube body (130) which are connected end to end and formed integrally, and the second tube body (130) is a tapered tube.

3. The non-returnable battery pack cooling connector according to claim 2, characterized in that: The self-sealing device (300) comprises a fixing sleeve (310), wherein the fixing sleeve (310) has a connecting pipe (311) with one end fixedly connected to the water outlet of the cold plate (200), and a first retaining ring (312) fixed to the outer ring of the connecting pipe (311).

4. The non-returnable battery pack cooling connector according to claim 3, characterized in that: The connecting pipe (311) comprises a first sleeve (3111) and a second sleeve (3112), wherein the first sleeve (3111) is connected to the water outlet of the cold plate (200), and a spring (330) is sleeved on the outer ring of the second sleeve (3112), and one end of the spring (330) is pressed against the first retaining ring (312).

5. The non-returnable battery pack cooling connector according to claim 4, characterized in that: The second sleeve (3112) is provided with a first opening (3113) penetrating the wall of the second sleeve (3112).

6. The non-returnable battery pack cooling connector according to claim 4, characterized in that: The core body (320) comprises a moving tube (321) and a second retaining ring (322) fixedly connected to the moving tube (321), wherein the second retaining ring (322) is used to press against one end of the spring (330) to provide a restoring elastic force for the core body (320).

7. The non-returnable battery pack cooling connector according to claim 6, characterized in that: The movable tube (321) comprises a third sleeve (3211), a tube groove (323) is provided in the third sleeve (3211), and the tube groove (323) is sleeved on the outer ring of the second sleeve (3112) so that the core body (320) can move axially along the second sleeve (3112).

8. The non-returnable battery pack cooling connector according to claim 6, characterized in that: The movable tube (321) includes a fourth sleeve (3212), an annular groove (324) is provided on the outer ring of the fourth sleeve (3212), a sealing ring (325) is connected inside the annular groove (324), and when the sealing ring (325) is pressed against the inner wall of the second tube body (130), the cooling water circulation channel (110) is closed.

9. The non-returnable battery pack cooling connector according to claim 8, characterized in that: The fourth sleeve (3212) is provided with a second opening (3213) penetrating the tube wall of the fourth sleeve (3212).

10. The non-returnable battery pack cooling connector according to claim 2, characterized in that: A protrusion (150) for snap-fitting and connecting with the water pipe joint (400) is provided on the outer ring of the first tube body (120).

Images