Energy storage liquid cooling device and battery pack

Abstract

The utility model provides an energy storage liquid cooling device and a battery pack, the energy storage cooling device comprises an adapter block, a liquid cooling piece and a pass-stop assembly, the liquid cooling piece is provided with a water gap, and the adapter block is installed on the water gap; wherein one end of the pass-stop assembly is arranged in the switching block in a sleeving manner, so that the energy storage liquid cooling device is switched to be in a conducting state or a closed state; the other end of the pass-stop assembly is used for being connected with an external pipeline. According to the utility model, the through-stop device is arranged on the adapter block, so that free insertion and extraction of an external pipeline during maintenance are facilitated, cooling liquid is prevented from flowing out in the maintenance process, and the maintenance efficiency is improved. And meanwhile, the cooling liquid is injected when the battery pack leaves the factory, so that the condition of liquid leakage in the transportation process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to an energy storage liquid cooling device and a battery pack. Background Art

[0002] At present, the cooling methods for energy storage battery packs are mainly air cooling and liquid cooling. Air cooling uses air as a heat exchange medium to achieve heat exchange between the battery cell and the operating environment through the air duct and air conditioning configured in the energy storage system. Air cooling has a certain degree of delay in the heat dissipation and cooling of the battery cell, slow cooling speed, and low heat dissipation efficiency. In addition, when using large battery cells, the large battery cells are thick, difficult to dissipate heat, and easy to bulge. After bulging, the battery cells compress the air cooling channel, causing the air cooling efficiency to decrease again, resulting in uneven temperature distribution of the battery cells and the battery pack as a whole, which can easily cause thermal runaway of the battery and cause the decomposition of the raw materials in the battery cell and accelerate the failure of the battery cell, endangering the safety of the entire battery pack and even the entire energy storage system. Liquid cooling uses liquid as a heat exchange medium. By immersing the entire battery cell in the circulating coolant, the surface of the battery cell is completely in contact with the coolant, which can directly absorb the heat generated when the battery cell is running. The coolant has a large specific heat capacity and a significant heat absorption effect.

[0003] During the maintenance of the existing liquid-cooled energy storage system, it is generally necessary to remove the pipeline and replace the new liquid-cooled battery pack. After installing the new liquid-cooled battery pack, the coolant needs to be injected again on site, which takes 30 minutes to 2 hours and is time-consuming and labor-intensive. Utility Model Content

[0004] In view of the above-mentioned deficiencies, the purpose of the utility model is to provide an energy storage liquid cooling device and a battery pack, so as to achieve the purpose of self-locking the water outlet of the liquid cooling device and reduce the leakage of the energy storage liquid cooling device during transportation; and facilitate the free plugging and unplugging of external pipelines during maintenance, so that no outflow of coolant occurs during the maintenance process, thereby improving the efficiency of maintenance.

[0005] An embodiment of the utility model provides an energy storage liquid cooling device, comprising an adapter block, a liquid cooling component and an on-off assembly, wherein the liquid cooling component is provided with a water outlet, and the adapter block is installed on the water outlet; wherein one end of the on-off assembly is sleeved in the adapter block to switch the energy storage liquid cooling device to an on state or a closed state; and the other end of the on-off assembly is used for connection to an external pipeline.

[0006] Furthermore, the on-off assembly includes a tube body, a limit piece, an elastic piece and a movable piece, and the elastic piece and the movable piece are both arranged in the tube body; one end of the limit piece is connected to the adapter block, and the other end of the limit piece is connected to the end of the tube body; one end of the elastic piece is against the end of the limit piece, and the other end of the elastic piece is sleeved on the movable piece, and when the movable piece moves along the length direction of the tube body, the elastic piece is deformed.

[0007] Furthermore, the middle part of the movable part radially extends to form a plurality of first bosses, which divide the movable part into a sealing part and an elastic connecting part, and the elastic connecting part is connected to the elastic part; the sealing part contacts the inside of the tube body when the energy storage liquid cooling device is in a closed state.

[0008] Furthermore, the inner wall of the tube body is radially contracted on one side away from the limiting member to form a second boss; when the energy storage liquid cooling device is in a closed state, each of the first bosses is in contact with the second boss.

[0009] Furthermore, the length of the sealing portion is consistent with the length of the second boss.

[0010] Further, one end of the elastic member contacts a surface of each first boss away from the second boss, and a limiting step is formed at a position where the first boss contacts the elastic member.

[0011] Furthermore, the on-off assembly also includes a sealing ring, which is arranged at one end of the tube body away from the limiting member, and the sealing ring is arranged inside the tube body; when the energy storage liquid cooling device is in a closed state, the sealing ring is in contact with the movable part.

[0012] Furthermore, the liquid cooling component is plate-shaped.

[0013] Furthermore, the energy storage liquid cooling device also includes a box body and a liquid cooling component, and the box body and the liquid cooling component are connected to form a semi-enclosed space.

[0014] The present invention also provides a battery pack, including:

[0015] The above energy storage liquid cooling device;

[0016] A battery module, wherein the battery module is installed on the energy storage liquid cooling device.

[0017] The energy storage liquid cooling device provided in this embodiment has the beneficial effect that: a stop device is provided on the adapter block, which facilitates the free plugging and unplugging of the external pipeline during maintenance, so that the cooling liquid does not flow out during the maintenance process, thereby improving the efficiency of maintenance. At the same time, the cooling liquid is injected into the battery pack when it leaves the factory, which reduces the leakage during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the structure of the battery pack in the embodiment of the utility model.

[0020] Figure 2 It is a cross-sectional view of the energy storage liquid cooling device in the closed state in the embodiment of the utility model.

[0021] Figure 3 It is a cross-sectional view of the energy storage liquid cooling device in the conductive state in the embodiment of the utility model.

[0022] Figure 4 for Figure 3 Cross-sectional view of the moving parts.

[0023] Figure 5 for Figure 4 Schematic diagram of the structure of the moving parts. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides an energy storage liquid cooling device, including an adapter block 10, a liquid cooling component 20 and a stop assembly 30, wherein the liquid cooling component 20 is provided with a water inlet 21, and the adapter block 10 is mounted on the water inlet 21; wherein one end of the stop assembly 30 is sleeved in the adapter block 10 to switch the energy storage liquid cooling device to a conducting state or a closed state (such as Figure 2 and Figure 3 The other end of the on-off assembly 30 is used for connection with an external pipeline.

[0028] In this embodiment, two water inlets 21 are provided, namely a water inlet and a water outlet. A transfer block 10 is installed at each water inlet 21. In other embodiments, the number of water inlets 21 can be set according to actual needs.

[0029] In the actual production process, the adapter block 10 can be directly welded to the liquid cooling component 20, or connected through adapter parts, including but not limited to using threaded connection, welding connection, or snap connection.

[0030] In some embodiments, the length of the water inlet 21 can be extended by the adapter block 10, and the on-off assembly 30 can be directly brazed with the adapter block 10 and the liquid cooling component 20, so as to facilitate maintenance during the manufacturing and use process.

[0031] The channel in the switching block 10 is bent, which can facilitate the switching and reversing of the flow path.

[0032] The liquid cooling element 20 is provided with a cooling liquid (not shown), and the cooling liquid may be a mixture of ethylene glycol and water or other media.

[0033] See also Figure 2 and Figure 3 The on-off assembly 30 includes a tube body 31 , a limiter 32 , an elastic member 33 and a movable member 34 . The elastic member 33 and the movable member 34 are both disposed in the tube body 31 , and the movable member 34 can move in the tube body 31 along the length direction of the tube body 31 .

[0034] In some embodiments, the movable part 34 is made of PA66 nylon, EPDM or other organic plastic materials.

[0035] In some embodiments, the tube body 31 is made of aluminum, and aluminum or other metals are arranged or embedded in the inner wall of the tube body 31 to improve the service life of the stop assembly 30. In some embodiments, the tube body 31 is made of PA66 nylon, EPDM or other organic plastic materials.

[0036] One end of the stopper 32 is connected to the adapter block 10, and the other end of the stopper 32 is connected to the end of the tube body 31. It is worth mentioning that in order to facilitate the connection of external pipelines, a part of the stopper 32 radially protrudes outward to form a stopper 321. The outer wall of the tube body 31 can also be provided with a circumferential groove according to actual conditions.

[0037] One end of the elastic member 33 abuts against the end of the stopper 32, and the other end of the elastic member 33 is sleeved on the movable member 34. When the movable member 34 moves along the length direction of the tube body 31, the elastic member 33 is deformed. When the movable member 34 is not subjected to external force, the elastic member 33 causes the movable member 34 to seal the tube opening of the tube body 31, so that the energy storage liquid cooling device is in a closed state, thereby achieving a self-locking sealing effect.

[0038] In this embodiment, the elastic member 33 is a spring. In other embodiments, the elastic member 33 can be other elastic objects.

[0039] The elastic member 33 and the movable member 34 may be fixed as one body, or they may be separately assembled.

[0040] Please combine Figure 2 , Figure 3 , Figure 4 and Figure 5 The middle part of the movable part 34 radially extends to form a plurality of first bosses 341, and the first bosses 341 divide the movable part 34 into a sealing part 342 and an elastic connecting part 343, and the elastic connecting part 343 is connected to the elastic part 33; when the energy storage liquid cooling device is in a closed state, the sealing part 342 contacts the inside of the tube body 31 to seal the tube mouth of the tube body 31.

[0041] In order to ensure the stability of the structure of the energy storage liquid cooling device, the outer wall of the first boss 341 is arc-shaped and contacts the inner wall of the tube body 31 to reduce shaking during use.

[0042] A channel for the coolant to pass through is reserved between two adjacent first bosses 341. When the movable member 34 is subjected to external force, the movable member 34 moves into the tube, so that the energy storage liquid cooling device is in a conducting state. At this time, the coolant can flow from the tube mouth through the channel into the liquid cooling member 20, or flow from the liquid cooling member 20 through the channel to the tube mouth and out.

[0043] The inner wall of the tube body 31 is radially contracted on one side away from the stopper 32 to form a second boss 311. When the energy storage liquid cooling device is in a closed state, each first boss 341 abuts against the second boss 311 to seal the tube opening of the tube body 31.

[0044] In order to further improve the sealing effect, the pass-stop assembly 30 also includes a sealing ring 35, which is arranged at one end of the tube body 31 away from the limit member 32, and the sealing ring 35 is arranged inside the tube body 31; when the energy storage liquid cooling device is in a closed state, the sealing ring 35 is in contact with the movable part 34 (specifically the sealing portion 342 of the movable part 34).

[0045] The length of the sealing portion 342 is consistent with the length of the second boss 311 , which not only ensures the sealing performance, but also avoids the leakage of coolant due to accidental contact with the movable part 34 due to the excessive length of the movable part 34 .

[0046] One end of the elastic member 33 contacts the surface of each first boss 341 away from the second boss 311, and a limiting step 344 is formed at the position where the first boss 341 contacts the elastic member 33. The limiting step 344 is used to limit the elastic member 33, reduce the displacement of the elastic member 33 during use, and ensure the structural stability of the on-off assembly 30.

[0047] In this embodiment, the liquid cooling element 20 is plate-shaped, and a flow channel is provided in the liquid cooling element 20, that is, the liquid cooling element 20 is an integrated design. The flow channel forms a closed loop in the plate, avoiding the risk of coolant outflow caused by plugging and unplugging external pipes when a battery pack or battery cell in the energy storage system needs to be replaced, greatly improving the efficiency of battery pack replacement and maintenance, while avoiding the risk of short circuit of the external circuit system caused by coolant outflow, and improving the overall safety of the energy storage system.

[0048] Understandably, an energy storage liquid cooling device provided by an embodiment of the utility model realizes self-locking of the liquid cooling component 20 through a stop assembly 30. When the movable part 34 of the stop assembly 30 is not subjected to external force, the force of the elastic part 33 causes the movable part 34 to seal the pipe mouth of the tube body 31, so that the energy storage liquid cooling device is in a closed state, thereby achieving a self-locking sealing effect. When the movable part 34 is subjected to external force, the movable part 34 moves into the tube, so that the energy storage liquid cooling device is in a conducting state. At this time, the coolant can flow from the pipe mouth through the channel between the first boss 341 of the movable part 34 into the liquid cooling component 20, or flow from the liquid cooling component 20 through the channel to the pipe mouth and out.

[0049] See also Figure 1 The energy storage liquid cooling device also includes a box body 1 and a liquid cooling component 20, and the box body 1 and the liquid cooling component 20 are connected to form a semi-enclosed space.

[0050] See also Figure 1The embodiment of the utility model also provides a battery pack, including: the above-mentioned energy storage liquid cooling device and the battery module 40, the battery module 40 is installed on the energy storage liquid cooling device, which is convenient for free plugging and unplugging of external pipes during maintenance, so that no coolant outflow occurs during maintenance, thereby improving the efficiency of maintenance. At the same time, the coolant is injected into the battery pack when it leaves the factory to reduce the leakage during transportation.

[0051] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage liquid cooling device, characterized in that: The invention comprises an adapter block (10), a liquid cooling component (20) and an on-off assembly (30); the liquid cooling component (20) is provided with a water inlet (21), and the adapter block (10) is mounted on the water inlet (21); one end of the on-off assembly (30) is sleeved in the adapter block (10) to switch the energy storage liquid cooling device to an on state or a closed state; and the other end of the on-off assembly (30) is used for connection with an external pipeline.

2. The energy storage liquid cooling device according to claim 1, characterized in that: The on-off assembly (30) comprises a tube body (31), a limiting member (32), an elastic member (33) and a movable member (34); the elastic member (33) and the movable member (34) are both arranged in the tube body (31); one end of the limiting member (32) is connected to the adapter block (10), and the other end of the limiting member (32) is connected to the end of the tube body (31); one end of the elastic member (33) abuts against the end of the limiting member (32), and the other end of the elastic member (33) is sleeved on the movable member (34); when the movable member (34) moves along the length direction of the tube body (31), the elastic member (33) is deformed.

3. The energy storage liquid cooling device according to claim 2, characterized in that: The middle part of the movable part (34) radially extends to form a plurality of first bosses (341), and the first bosses (341) divide the movable part (34) into a sealing part (342) and an elastic connecting part (343), and the elastic connecting part (343) is connected to the elastic part (33); the sealing part (342) is in contact with the inside of the tube body (31) when the energy storage liquid cooling device is in a closed state.

4. The energy storage liquid cooling device according to claim 3, characterized in that: The inner wall of the tube body (31) is radially contracted on one side away from the limiting member (32) to form a second boss (311); when the energy storage liquid cooling device is in a closed state, each of the first bosses (341) is in contact with the second boss (311).

5. The energy storage liquid cooling device according to claim 4, characterized in that: The length of the sealing portion (342) is consistent with the length of the second boss (311).

6. The energy storage liquid cooling device according to claim 4, characterized in that: One end of the elastic member (33) contacts the surface of each first boss (341) away from the second boss (311), and a limiting step (344) is formed at the contact position between the first boss (341) and the elastic member (33).

7. The energy storage liquid cooling device according to claim 2, characterized in that: The on-off assembly (30) further comprises a sealing ring (35), wherein the sealing ring (35) is arranged at one end of the tube body (31) away from the limiting member (32), and the sealing ring (35) is arranged inside the tube body (31); when the energy storage liquid cooling device is in a closed state, the sealing ring (35) is in contact with the movable member (34).

8. The energy storage liquid cooling device according to claim 1, characterized in that: The liquid cooling element (20) is plate-shaped.

9. The energy storage liquid cooling device according to claim 1, characterized in that: The energy storage liquid cooling device further comprises a box body (1) and a liquid cooling component (20), wherein the box body (1) and the liquid cooling component (20) are connected to form a semi-enclosed space.

10. A battery pack comprising: The energy storage liquid cooling device according to any one of claims 1 to 9; A battery module (40), wherein the battery module (40) is mounted on the energy storage liquid cooling device.

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