Liquid-cooled battery pack leakage-proof structure

Abstract

This application relates to a leak-proof structure for a liquid-cooled battery pack, comprising a top cover, a battery module, a leak-proof tray, and a liquid-cooling plate. The leak-proof tray is disposed on the liquid-cooling plate, and the battery module is disposed within the leak-proof tray, with the battery module and the leak-proof tray being adapted to each other. The top cover is fitted onto the battery module, and the top cover abuts against the liquid-cooling plate. The leak-proof tray includes a heat-conducting sheet and a PC tray, with the heat-conducting sheet disposed on the PC tray, and the battery module abutting against both the heat-conducting sheet and the PC tray. This application significantly reduces the risk of battery pack leakage due to cell leakage, effectively avoiding short circuits between modules and between the battery module and the inner wall of the battery pack caused by cell leakage, thus improving the safety of the battery pack and consequently the safety of the energy storage system. This application has a simple structure, is easy to implement, has low cost, and good stability, and can well meet the needs of practical use.

Description

Technical Field

[0001] This utility model relates to the field of energy storage system technology, and in particular to a leak-proof structure for a liquid-cooled battery pack. Background Technology

[0002] With the advancement of technology, the requirements for energy storage systems are becoming increasingly stringent. During the operation of an energy storage system, the reliability of the battery cells is paramount. The end plates and inner walls of battery pack modules are generally made of metal, and the modules are typically secured with steel cable ties. When a cell leaks, short circuits can easily form between modules through the cable ties or metal end plates. There is also a chance that a battery module can short-circuit with the metal inner wall of the battery pack, generating a large current and potentially leading to fires, combustion, or even explosions, posing significant safety hazards.

[0003] In numerous energy storage system fires worldwide, the cause has been battery cell leakage. Therefore, implementing effective measures to prevent short circuits in energy storage systems caused by battery cell leakage is of paramount importance. Utility Model Content

[0004] Based on this, the present invention provides a liquid-cooled battery pack anti-leakage structure, which aims to solve the problems of battery pack fire, combustion and explosion caused by leakage of battery cells leading to short circuits in the energy storage system.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a liquid-cooled battery pack leak-proof structure, comprising a top cover, a battery module, a leak-proof tray, and a liquid-cooling plate; the leak-proof tray is disposed on the liquid-cooling plate, the battery module is disposed within the leak-proof tray, and the battery module is adapted to fit the leak-proof tray; the top cover is fitted onto the battery module, and the top cover abuts against the liquid-cooling plate; the leak-proof tray comprises a heat-conducting sheet and a PC tray, the heat-conducting sheet is disposed on the PC tray, and the battery module abuts against both the heat-conducting sheet and the PC tray.

[0006] In a preferred embodiment, the PC tray is a PC tray frame, which surrounds the outside of the heat-conducting sheet; the heat-conducting sheet abuts against the liquid cooling plate.

[0007] In a preferred embodiment, the heat-conducting sheet is laid on the PC tray, and the frame of the PC tray surrounds the outside of the heat-conducting sheet; the PC tray abuts against the liquid cooling plate.

[0008] In a preferred embodiment, the heat-conducting sheet is adapted to the PC tray; the battery module is adapted to the heat-conducting sheet.

[0009] In a preferred embodiment, the battery module includes at least a first battery module and a second battery module, wherein the first battery module and the second battery module are disposed adjacent to each other, and a gap is provided between the first battery module and the second battery module.

[0010] In a preferred embodiment, the first battery module and the second battery module are fixed to the liquid cooling plate by a fixing rod; the fixing rod is adapted to the liquid cooling plate.

[0011] In a preferred embodiment, the first battery module includes a plurality of first module units arranged in parallel phases; the second battery module includes a plurality of second module units arranged in parallel phases; the first module units and the second module units are respectively arranged in a one-to-one correspondence with the leak-proof tray.

[0012] In a preferred embodiment, the liquid cooling plate has a plurality of grooves on its side near the leak-proof tray; the plurality of grooves are arranged parallel to each other.

[0013] In a preferred embodiment, the depth of the groove is less than the thickness of the liquid cooling plate; the groove is a serpentine groove.

[0014] In a preferred embodiment, the heat-conducting sheet is a thermally conductive silicone pad or a thermal pad; the battery module is a lithium battery module.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0016] (1) By setting a leak-proof tray, this application achieves electrical isolation between battery modules, avoids short-circuit failure between modules, and improves the safety of the energy storage system.

[0017] (2) By setting a leak-proof tray at the bottom of the battery module, the insulation of the battery module can be further enhanced, reducing the risk of insulation failure. This application has a simple structure, is easy to implement, has low cost, and good stability, which can well meet the needs of practical use.

[0018] (3) By setting a leak-proof tray at the bottom of the battery module, even if there is leakage in the cell, the leak-proof tray can receive all the electrolyte, thereby effectively cutting off the short circuit between modules and between the module and the battery pack. This greatly reduces the risk of battery pack leakage caused by cell leakage, effectively avoids short circuits between modules and between the battery module and the inner wall of the battery pack caused by cell leakage, effectively improves the safety of the battery pack, and thus improves the safety of the battery energy storage system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a leak-proof liquid-cooled battery pack according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 An exploded structural diagram of the leak-proof structure of a liquid-cooled battery pack;

[0022] Figure 3 for Figure 2 A magnified structural diagram at point A;

[0023] Figure 4 for Figure 2 A schematic diagram of the exploded structure of the leak-proof tray;

[0024] Figure 5 for Figure 2 A schematic diagram of the structure of the leak-proof tray and the liquid cooling plate.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Specifically, such as Figures 1 to 5 As shown, the present invention provides the following technical solution: a leak-proof structure for a liquid-cooled battery pack, comprising a top cover 10, a battery module 20, a leak-proof tray 30, and a liquid-cooling plate 40; the leak-proof tray 30 is disposed on the liquid-cooling plate 40, the battery module 20 is disposed within the leak-proof tray 30, and the battery module 20 is adapted to the leak-proof tray 30; the top cover 10 covers the battery module 20, and the top cover 10 abuts against the liquid-cooling plate 40; the leak-proof tray 30 includes a heat-conducting sheet 31 and a PC tray 32, the heat-conducting sheet 31 is disposed on the PC tray 32, and the battery module 20 abuts against the heat-conducting sheet 31 and the PC tray 32 respectively.

[0032] As a preferred embodiment, such as Figure 4As shown, in this embodiment, the PC tray 32 is a PC tray frame, which surrounds the outside of the heat-conducting sheet 31; the heat-conducting sheet 31 abuts against the liquid cooling plate 40. This arrangement ensures the function of a leak-proof tray while effectively saving PC insulation material and reducing costs.

[0033] In a preferred embodiment, the heat-conducting sheet 31 is laid on the PC tray 32, and the frame of the PC tray 32 surrounds the outside of the heat-conducting sheet 31; the PC tray 32 abuts against the liquid cooling plate 40. When the heat-conducting sheet 31 uses thermally conductive structural adhesive, the thermally conductive structural adhesive can be laid on the PC tray, and the frame of the PC tray can surround the heat-conducting sheet.

[0034] In a preferred embodiment, the heat-conducting sheet 31 is adapted to the PC tray 32; the battery module 20 is adapted to the heat-conducting sheet 31. This arrangement ensures that the heat-conducting sheet dissipates heat from the battery module 20 in a timely manner, guaranteeing the heat dissipation effect.

[0035] In a preferred embodiment, the battery module 20 includes at least a first battery module 21 and a second battery module 22, wherein the first battery module 21 and the second battery module 22 are arranged adjacent to each other, and a gap is provided between the first battery module 21 and the second battery module 22. By providing a gap, heat dissipation between adjacent battery modules can be ensured; the number of battery modules can be set according to actual needs, and can be two, three, or even more groups.

[0036] In a preferred embodiment, the first battery module 21 and the second battery module 22 are fixed to the liquid cooling plate 40 by a fixing rod 23; the fixing rod 23 is adapted to the liquid cooling plate 40. This arrangement ensures that the liquid cooling plate 40 dissipates heat from the battery module 20 in a timely manner, thus guaranteeing the heat dissipation effect.

[0037] In a preferred embodiment, the first battery module 21 includes a plurality of first module units 211 arranged in parallel; the second battery module 22 includes a plurality of second module units 221 arranged in parallel; the first module unit 211 and the second module unit 221 are respectively corresponding one-to-one with the leak-proof tray 30. That is, in this embodiment, one first module unit 211 corresponds to one leak-proof tray 30, and one second module unit 221 corresponds to one leak-proof tray 30. In this way, each module unit is independent of each other, and leakage in one module unit will not affect the normal use of other module units.

[0038] In a preferred embodiment, the liquid cooling plate 40 has a plurality of grooves (not shown in the figure) on the side near the leak-proof tray 30; the plurality of grooves are arranged parallel to each other.

[0039] In a preferred embodiment, the depth of the groove is less than the thickness of the liquid cooling plate 40; the groove is a serpentine groove. The serpentine groove provides a flow channel for the coolant, ensuring the heat dissipation effect of the liquid cooling plate.

[0040] In a preferred embodiment, the heat-conducting sheet 31 is a thermally conductive silicone pad or a thermal pad; the battery module 20 is a lithium battery module.

[0041] In this embodiment, by setting a leak-proof tray, electrical isolation between battery modules is achieved, short-circuit failure between modules is avoided, and the safety of the energy storage system is improved.

[0042] This application's structure, by incorporating a leak-proof tray at the bottom of the battery module, further enhances the module's insulation and reduces the risk of insulation failure. The structure is simple, easy to implement, low-cost, and exhibits good stability, effectively meeting the needs of practical applications.

[0043] In the structure of this application, a leak-proof tray is set at the bottom of the battery module. Even if there is leakage in the battery cell, the leak-proof tray can receive all the electrolyte, thereby effectively cutting off the short circuit between modules and between the module and the battery pack. This greatly reduces the risk of battery pack leakage caused by battery cell leakage, effectively avoids short circuits between modules and between the battery module and the inner wall of the battery pack caused by battery cell leakage, effectively improves the safety of the battery pack, and thus improves the safety of the battery energy storage system.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A leak-proof structure for a liquid-cooled battery pack, characterized in that, The device includes a top cover, a battery module, a leak-proof tray, and a liquid cooling plate. The leak-proof tray is disposed on the liquid cooling plate, and the battery module is disposed within the leak-proof tray, with the battery module and the leak-proof tray being adapted to each other. The top cover is fitted onto the battery module, and the top cover abuts against the liquid cooling plate. The leak-proof tray includes a heat-conducting sheet and a PC tray, with the heat-conducting sheet disposed on the PC tray, and the battery module abutting against both the heat-conducting sheet and the PC tray.

2. The leak-proof structure for a liquid-cooled battery pack according to claim 1, characterized in that, The PC tray is a PC tray frame, which surrounds the outside of the heat-conducting sheet; the heat-conducting sheet is in contact with the liquid cooling plate.

3. The leak-proof structure for a liquid-cooled battery pack according to claim 1, characterized in that, The heat-conducting sheet is laid on the PC tray, and the frame of the PC tray surrounds the outside of the heat-conducting sheet; the PC tray abuts against the liquid cooling plate.

4. The leak-proof structure for a liquid-cooled battery pack according to claim 1, characterized in that, The heat-conducting sheet is adapted to the PC tray; the battery module is adapted to the heat-conducting sheet.

5. The leak-proof structure for a liquid-cooled battery pack according to claim 1, characterized in that, The battery module includes at least a first battery module and a second battery module, wherein the first battery module and the second battery module are arranged adjacent to each other and a gap is provided between the first battery module and the second battery module.

6. The leak-proof structure for a liquid-cooled battery pack according to claim 5, characterized in that, The first battery module and the second battery module are fixed to the liquid cooling plate by a fixing rod; the fixing rod is adapted to the liquid cooling plate.

7. The leak-proof structure for a liquid-cooled battery pack according to claim 5, characterized in that, The first battery module includes multiple first module units arranged in parallel phases; the second battery module includes multiple second module units arranged in parallel phases; the first module units and the second module units are respectively arranged in a one-to-one correspondence with the leak-proof tray.

8. The leak-proof structure for a liquid-cooled battery pack according to claim 1, characterized in that, The liquid cooling plate has multiple grooves on its side near the leak-proof tray; the multiple grooves are arranged parallel to each other.

9. The leak-proof structure for a liquid-cooled battery pack according to claim 8, characterized in that, The depth of the groove is less than the thickness of the liquid cooling plate; the groove is a serpentine groove.

10. The leak-proof structure for a liquid-cooled battery pack according to claim 1, characterized in that, The heat-conducting sheet is a thermally conductive silicone pad or a thermal pad; the battery module is a lithium battery module.

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