Battery system cooling liquid self-stopping structure and battery pack

Abstract

The utility model provides a battery system cooling liquid self-stop structure and battery pack, battery system cooling liquid self-stop structure includes liquid cooling pipe, connector and connecting pipe, the inner wall of connector is provided with limit step, the inside of connector is slidingly provided with piston, the piston includes rod body and disc body, and the rod body and the disc body are connected through the connecting pipe. A pushing part is fixedly arranged in the connecting pipe, the liquid cooling pipe is connected with one end of the connector, the connecting pipe is inserted into the other end of the connector, so that the pushing part abuts against the rod body, and when the connecting pipe is detached, the disc body is pressed on the limiting step under the action of cooling liquid, and the connector is plugged. According to the utility model, the piston is arranged in the connector, and the pushing part matched with the piston is arranged in the connecting pipe, so that the self-stopping function of the cooling liquid can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling systems, in particular to a battery system coolant self-stop structure and a battery pack. Background Art

[0002] To ensure battery safety and stability, existing fast-charging liquid-cooled battery systems are equipped with bottom liquid cooling plates or large-surface liquid cooling plates. The liquid cooling plates are connected in series / parallel and then converged to the main inlet / outlet. When the vehicle's three-electric system is disassembled or the battery system needs maintenance, the coolant must be drained, resulting in coolant waste and the coolant is also prone to contaminating surrounding parts.

[0003] A Chinese invention patent application, publication number CN114204201A, discloses a quick-change battery terminal liquid-cooling connection device, a battery pack, and an electric vehicle. The quick-change battery terminal liquid-cooling connection device includes a first liquid-cooling connection device and a second liquid-cooling connection device. The first liquid-cooling connection device includes a first mounting seat and a first connecting valve. The second liquid-cooling connection device includes a second mounting seat and a second connecting valve. The first connecting valve includes a first core and a valve plug. The flow channel can be opened or closed by the telescopic movement of the valve plug. The second connecting valve includes a second housing and a second valve core. When the first and second connecting valves are connected, the second housing pushes the valve plug open, opening the internal channel of the first liquid-cooling connection device. The first core pushes the second valve core open, opening the internal channel of the second liquid-cooling connection device. When disassembled, the internal channels of the first and second liquid-cooling connection devices automatically close. However, this structure is relatively complex, requiring two sets of valve cores and two mounting seats, making production, installation, and disassembly inconvenient. Utility Model Content

[0004] The purpose of the present utility model is to address the defects of the existing technology and provide a battery system coolant self-stopping structure and a battery pack. By arranging a piston inside the connecting head and arranging a pushing part that cooperates with the piston inside the connecting tube, the self-stopping function of the coolant can be achieved.

[0005] In order to solve the above technical problems, the utility model provides a battery system coolant self-stopping structure, including a liquid cooling tube, a connecting head and a connecting tube, a limiting step is provided on the inner wall of the connecting head, a piston is slidably provided in the connecting head, the piston includes a rod body and a disk body, a pushing part is fixedly provided in the connecting tube, the liquid cooling tube is connected to one end of the connecting head, and the connecting tube is inserted into the other end of the connecting head so that the pushing part is against the rod body. When the connecting tube is removed, the disk body is pressed on the limiting step under the action of the coolant to seal the connecting head.

[0006] Furthermore, a connecting rod is provided in the connecting head, one end of the connecting rod is connected to the inner wall of the connecting head, and a connecting tube is fixedly provided at the other end of the connecting rod, the axial direction of the connecting tube is parallel to the axial direction of the connecting head, and the rod body is slidably provided in the connecting tube.

[0007] In some embodiments, a limiting portion is provided on the rod body, and the limiting portion cooperates with one end of the connecting tube to limit the length of the piston extending into the liquid cooling tube.

[0008] In some embodiments, the piston is elastically connected to the connector via a spring, so that when the connecting pipe is removed, the disc is pressed onto the limiting step under the combined action of the coolant and the spring to seal the connector.

[0009] Furthermore, a limiting portion is provided on the rod body, and the limiting portion is arranged on a side of the connecting tube away from the disc body. One end of the spring is connected to the limiting portion, and the other end of the spring is connected to the connecting tube.

[0010] In some embodiments, a bell mouth is provided at one end of the connector connected to the liquid cooling tube, and the limiting step is arranged on a side of the bell mouth away from the liquid cooling tube.

[0011] In some embodiments, the connector is plug-connected or threadedly connected to the connecting pipe.

[0012] In some embodiments, a sealing ring is provided on the outer edge of the disk.

[0013] In some embodiments, the pushing portion includes a plurality of push rods, one end of each push rod is connected to the inner wall of the connecting tube, and the other end of each push rod is connected to the end of the other push rods.

[0014] In the second aspect, the utility model provides a battery pack, including the battery system coolant self-stopping structure, and also including a box body, one end of the liquid cooling tube extends out of the box body, and one end of the connecting head is connected to the part of the liquid cooling tube extending out of the box body and rests on the box body.

[0015] The beneficial effects of the utility model are:

[0016] 1. In the present invention, when the connecting tube is inserted into the connector, the pusher pushes the rod, separating the disc from the limiting step, thereby opening the connector. The liquid cooling medium can enter the liquid cooling plate through the connector and the liquid cooling tube. When maintenance is required, after the connecting tube is removed from the connector, the coolant inside the liquid cooling tube has a certain pressure, which pushes the disc to fit tightly against the limiting step, thereby sealing the connector and completing the self-stop function of the coolant. The coolant inside the power battery system will not flow out, and the amount of coolant used can be greatly reduced when refilling, saving costs. At the same time, it also solves the problem of traditional methods where the coolant sprays out under pressure and contaminates surrounding components, causing inconvenience in repair and maintenance. Compared with the existing technology, the structure is simple.

[0017] 2. The utility model is provided with a spring. Under the action of the spring and the coolant, the disc body can be tightly pressed against the limit step, thereby ensuring the sealing effect and preventing the coolant from flowing out.

[0018] 3. The utility model can reduce the resistance of the coolant by setting the bell mouth, ensure the flow rate of the coolant, and avoid affecting the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 Schematic diagram of the connection structure between the connector and the connecting pipe in some embodiments of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the connecting pipe of the utility model;

[0022] Figure 4 Schematic diagram of the structure of the connector in some embodiments of the present invention.

[0023] Reference numerals: 1-liquid cooling tube;

[0024] 2-connector; 21-bell mouth; 22-limiting step; 23-connecting rod; 24-connecting cylinder; 25-rod body; 26-spring; 27-limiting part; 28-disc body; 29-sealing ring;

[0025] 3-connecting pipe; 31-push rod;

[0026] 4-Box. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0028] like Figure 1 As shown, the utility model provides a battery system coolant self-stop structure, including a liquid cooling tube 1, a connector 2 and a connecting tube 3 connected in sequence, two liquid cooling tubes 1, two connectors 2 and two connecting tubes 3 are provided, respectively used for liquid inlet and liquid outlet, one end of the liquid cooling tube 1 is connected to the liquid cooling plate, the other end of the liquid cooling tube 1 is connected to one end of the connector 2 by a thread, and the other end of the connector 2 is connected to the connecting tube 3 by a quick plug connector or a threaded connection.

[0029] like Figure 2 As shown, the connector 2 is a variable diameter structure, a limiting step 22 is provided on the inner wall of the connector 2, a piston is slidably provided in the connector 2, the piston includes a rod body 25 and a disc body 28, a pushing portion is fixedly provided in the connecting tube 3, and the pushing portion rests on the rod body 25. When the connecting tube 3 is removed, the disc body 28 is pressed on the limiting step 22 under the action of the coolant, thereby sealing the connector 2.

[0030] It is understandable that when the connecting tube 3 is inserted into the connector 2, the pushing part will push the rod 25, causing the disc 28 to separate from the limiting step 22, thereby opening the connector 2 and allowing the liquid cooling medium to enter the liquid cooling plate through the connector 2 and the liquid cooling tube 1. When maintenance is required, after the connecting tube 3 is removed from the connector 2, the coolant inside the liquid cooling tube 1 has a certain pressure, which will push the disc 28 to fit tightly against the limiting step 22, thereby sealing the connector 2 and completing the self-stop function of the coolant. The coolant inside the power battery system will not flow out, and the amount used can be greatly reduced when refilling the liquid, saving costs. At the same time, it also solves the problem that the traditional method of coolant spraying due to pressure will contaminate surrounding components, causing inconvenience in repair and maintenance.

[0031] like Figure 4 As shown, in some embodiments, a connecting rod 23 is provided in the connector 2, one end of the connecting rod 23 is fixedly welded to the inner wall of the connector 2, and the other end of the connecting rod 23 is fixedly welded to a connecting cylinder 24, which is coaxially arranged with the connector 2, and a rod body 25 is slidably disposed in the connecting cylinder 24. This method can achieve a sliding connection between the piston and the connector 2.

[0032] To prevent the piston from disengaging from the connecting tube 24, a stopper 27 is provided on the rod 25. The stopper 27 cooperates with one end of the connecting tube 24 to limit the length of the piston extending into the liquid cooling tube 1. The stopper 27 can be a stopper ring or multiple stopper protrusions. After the piston moves a certain distance, the stopper 27 abuts against the connecting tube 24, limiting further movement of the piston.

[0033] like Figure 2As shown, in some embodiments, the piston and connector 2 are elastically connected via a spring 26, so that when the connecting tube 3 is removed, the disc 28 is pressed against the limiting step 22 by the combined action of the coolant and the spring 26, thereby sealing the connector 2. A limiting portion 27 is disposed on the side of the connecting tube 24 away from the disc 28. One end of the spring 26 is fixedly connected to the limiting portion 27, and the other end of the spring 26 is fixedly connected to the connecting tube 24. Figure 2 In the state shown, the spring 26 is in a compressed state. Under the action of the spring 26 and the coolant, the disc 28 can be tightly pressed against the limiting step 22 to ensure a blocking effect and prevent the coolant from flowing out.

[0034] like Figure 2 As shown, in some embodiments, a bell mouth 21 is provided at one end of the connector 2 connected to the liquid cooling pipe 1, and a limiting step 22 is arranged on the side of the bell mouth 21 away from the liquid cooling pipe 1. It can be understood that when the piston is pushed toward the liquid cooling pipe 1 by the pushing portion, the disc 28 of the piston has a certain resistance to the flow of the coolant. If the connector 2 is set to Figure 4 In the structure shown, the flow resistance of the coolant is relatively large. By providing the bell mouth 21, the resistance to the coolant can be reduced, the flow rate of the coolant can be guaranteed, and the cooling effect can be avoided from being affected.

[0035] like Figure 2 As shown, in some embodiments, a sealing ring 29 is provided on the outer edge of the disk body 28 to further improve the sealing effect.

[0036] like Figure 3 As shown, in some embodiments, the pushing portion includes multiple push rods 31, one end of the push rod 31 is connected to the inner wall of the connecting tube 3, and the other end of the push rod 31 is connected to the end of other push rods 31. Two, three or more push rods 31 can be provided, but the number and cross-sectional area of the push rods 31 should be reduced as much as possible to reduce the resistance of the push rods 31 to the flow of coolant.

[0037] like Figure 1 As shown, the utility model also provides a battery pack, including the above-mentioned battery system coolant self-stopping structure, and also includes a box body 4, one end of the liquid cooling tube 1 extends out of the box body 4, and one end of the connector 2 is threadedly connected to the part of the liquid cooling tube 1 extending out of the box body 4 and rests on the box body 4.

[0038] The utility model only needs to add a few simple structures on the inner walls of the connecting head 2 and the connecting pipe 3 to achieve the self-stopping function of the coolant, and has a simple structure and strong applicability.

[0039] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A battery system coolant self-stop structure, characterized by: The invention comprises a liquid cooling tube (1), a connector (2) and a connecting tube (3); a limiting step (22) is provided on the inner wall of the connecting tube (2); a piston is slidably provided in the connecting tube (2); the piston comprises a rod body (25) and a disk body (28); a pushing portion is fixedly provided in the connecting tube (3); the liquid cooling tube (1) is connected to one end of the connecting tube (2); the connecting tube (3) is inserted into the other end of the connecting tube (2) so that the pushing portion abuts against the rod body (25); when the connecting tube (3) is removed, the disk body (28) is pressed on the limiting step (22) under the action of the cooling liquid, thereby sealing the connecting tube (2).

2. The battery system coolant self-stop structure according to claim 1, characterized in that: A connecting rod (23) is provided in the connecting head (2), one end of the connecting rod (23) is connected to the inner wall of the connecting head (2), and a connecting cylinder (24) is fixedly provided at the other end of the connecting rod (23), the axial direction of the connecting cylinder (24) is parallel to the axial direction of the connecting head (2), and the rod body (25) is slidably provided in the connecting cylinder (24).

3. The battery system coolant self-stop structure according to claim 2, characterized in that: A limiting portion (27) is provided on the rod body (25), and the limiting portion (27) cooperates with one end of the connecting tube (24) to limit the length of the piston extending into the liquid cooling tube (1).

4. The battery system coolant self-stop structure according to claim 2, characterized in that: The piston is elastically connected to the connector (2) via a spring (26), so that when the connecting pipe (3) is removed, the disc (28) is pressed onto the limiting step (22) under the combined action of the coolant and the spring (26), thereby sealing the connector (2).

5. The battery system coolant self-stop structure according to claim 4, characterized in that: A limiting portion (27) is provided on the rod body (25), and the limiting portion (27) is arranged on a side of the connecting tube (24) away from the disc body (28). One end of the spring (26) is connected to the limiting portion (27), and the other end of the spring (26) is connected to the connecting tube (24).

6. The battery system coolant self-stop structure according to any one of claims 1 to 5, characterized in that: A bell mouth (21) is provided at one end of the connector (2) connected to the liquid cooling pipe (1), and the limiting step (22) is arranged on a side of the bell mouth (21) away from the liquid cooling pipe (1).

7. The battery system coolant self-stop structure according to any one of claims 1 to 5, characterized in that: The connector (2) is plug-connected or threadedly connected to the connecting pipe (3).

8. The battery system coolant self-stop structure according to any one of claims 1 to 5, characterized in that: A sealing ring (29) is provided on the outer edge of the disk body (28).

9. The battery system coolant self-stop structure according to any one of claims 1 to 5, characterized in that: The pushing portion comprises a plurality of push rods (31), one end of each push rod (31) is connected to the inner wall of the connecting tube (3), and the other end of each push rod (31) is connected to the end of the other push rods (31).

10. A battery pack, characterized in that: The battery system coolant self-stopping structure comprises the structure according to any one of claims 1 to 9, and further comprises a box body (4), one end of the liquid cooling tube (1) extends out of the box body (4), and one end of the connector (2) is connected to the portion of the liquid cooling tube (1) extending out of the box body (4) and abuts against the box body (4).

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