An immersed self-circulating liquid-cooled battery pack

Abstract

The utility model relates to battery pack technical field especially, especially one kind is immersed self -circulation liquid -cooled battery pack, including a liquid -cooled box (10) and a battery box (20) set in the liquid -cooled box (10) and with the liquid -cooled box (10) intercommunication, the bottom of the liquid -cooled box (10) is provided with a recess (111), a micro pump (30) for pumping the coolant in the liquid -cooled box (10) into the battery box (20) is provided in the recess (111), and a plurality of electric core (40) are provided in the battery box (20). The utility model liquid -cooled box and liquid box stack arrangement, are convenient for maintenance and independently have coolant circulating system, and any unit failure will not affect the operation and refrigeration of other units;Coolant is used to immerse the electric core and carry out the immersion cooling, and heating component or position and coolant directly contact, and heat can be more quickly and efficiently taken away through coolant, and transient heat dissipation effect is better.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to an immersion self-circulating liquid-cooled battery pack. Background Technology

[0002] Immersion cooling involves directly immersing the battery cell in a non-toxic, insulating, high thermal conductivity, and high specific heat capacity immersion liquid, allowing the battery cell to directly contact the immersion liquid for heat exchange, thereby improving the heat dissipation performance of the battery cell and the temperature uniformity between the battery cells.

[0003] Immersion liquid cooling, due to its direct heat exchange with the battery cells, offers higher heat transfer efficiency than indirect liquid cooling via liquid cooling plates. However, it places higher demands on flow channel design. If the flow organization of the immersion liquid is not optimized, localized flow dead zones can easily appear, causing localized heat accumulation and affecting the temperature characteristics of the battery pack. Furthermore, the flow channel design must also consider sealing and manufacturability. An overly complex flow channel design may not guarantee structural sealing at all points and can also lead to manufacturing difficulties and high costs.

[0004] Furthermore, considering that submersible liquid-cooled battery packs typically immerse all materials inside the battery pack (such as cells, wiring harnesses, BMUs, fuses, etc.) in the immersion liquid, this approach simplifies the design and fabrication of the battery pack casing, as all internal materials are located in the same area within the casing. Although this allows for a smaller battery pack size compared to semi-submersible designs, it requires openings on the front of the battery pack for the placement of through-wall terminals, connectors, liquid inlet / outlet ports, and immersion liquid inlets / outlets, making the immersion liquid prone to leakage.

[0005] Therefore, existing technologies need to be improved and enhanced. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an immersion self-circulating liquid-cooled battery pack that can quickly and efficiently remove heat and has a better heat dissipation effect.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An immersion-type self-circulating liquid-cooled battery pack includes a liquid-cooled housing and a battery housing disposed on and connected to the liquid-cooled housing. A groove is provided at the bottom of the liquid-cooled housing, and a micro pump for pumping coolant from the liquid-cooled housing into the battery housing is disposed in the groove. A plurality of battery cells are disposed in the battery housing.

[0008] As a further embodiment of this utility model, the liquid cooling box includes a liquid cooling box body, the liquid cooling box body includes a first bottom plate, a first front end plate, a first rear end plate, two first side plates and a first cover plate, and the first cover plate is provided with a liquid injection port.

[0009] As a further embodiment of this utility model, the groove opening is lower than the bottom plane of the first base plate.

[0010] As a further embodiment of this utility model, the bottom plane of the first base plate is composed of several inclined surfaces, and the bottom edge of each inclined surface is connected to the groove.

[0011] As a further embodiment of this utility model, the micro pump is connected to a first pipe, the first pipe extends out of the liquid cooling box and connects to a second pipe inside the battery box, the second pipe having several liquid outlets.

[0012] As a further embodiment of this utility model, an internally threaded bend joint is provided between the first pipe and the second pipe.

[0013] As a further embodiment of this utility model, the top ends of the two first side plates extend towards each other with an extension portion, and the inner walls of the two first side plates are provided with a guide limiting strip corresponding to the extension portion. A guide groove is formed between the guide limiting strip and the corresponding extension portion to facilitate the insertion of the first cover plate.

[0014] As a further embodiment of this utility model, the first rear end plate is provided with a plurality of guide support members, and the plurality of guide support members are flush with the guide limiting strip.

[0015] As a further embodiment of this utility model, the battery box includes a battery box body, which includes a second bottom plate, a second front end plate, a second rear end plate, two second side plates, and a second cover plate.

[0016] As a further embodiment of this utility model, a partition plate is provided inside the battery housing to divide the cavity of the battery housing body into a first cavity and a first second cavity. A main liquid return port connected to the liquid-cooled housing is provided on the second bottom plate near the partition plate. An auxiliary liquid return port is provided at the bottom of the partition plate near the main liquid return port.

[0017] As a further embodiment of this utility model, a plurality of the battery cells are mounted on a battery cell support fixing member, and the second pipe is mounted on the battery cell support fixing member through a plurality of fixing brackets.

[0018] Compared with the prior art, the beneficial effects of this utility model are: Due to the aforementioned structural design, namely the liquid-cooled housing and the battery housing mounted on the liquid-cooled housing, a micro-pump is installed inside the liquid-cooled housing to pump the coolant from the liquid-cooled housing into the battery housing. The battery housing and the liquid housing are stacked, which facilitates maintenance and provides an independent coolant circulation system. The failure of any unit will not affect the operation and cooling of other units. The coolant is used to immerse the battery cells for cooling, and the heat-generating components or locations are in direct contact with the coolant. The coolant can remove heat more quickly and efficiently, resulting in better transient heat dissipation. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Appendix Figure 2 This is a schematic diagram of the structure of the liquid-cooled box in an embodiment of the present invention; Appendix Figure 3 This is a schematic diagram of the structure of the first cover plate in an embodiment of the present utility model; Appendix Figure 4 This is a schematic diagram of the liquid cooling box body after the first cover plate has been removed, according to an embodiment of the present invention. Appendix Figure 5 This is a schematic diagram of the battery box structure according to an embodiment of the present utility model; Appendix Figure 6 This is an exploded structural diagram of the battery box body according to an embodiment of the present invention; Appendix Figure 7 This is a cross-sectional structural diagram of the battery box body according to an embodiment of the present utility model; Appendix Figure 8 This is a schematic diagram of the battery box after the second cover plate has been removed in an embodiment of this utility model.

[0020] The labels in the diagram are as follows: 10-Liquid cooling box, 20-Battery box, 30-Micro pump, 40-Battery cell, 50-First pipe, 60-Second pipe; 11-First base plate, 12-First front end plate, 13-First rear end plate, 14-First side plate, 15-First cover plate; 21-Second base plate, 22-Second front end plate, 23-Second rear end plate, 24-Second side plate, 25-Second cover plate, 26-Cavity partition plate 111 - Groove; 151-Injection port; 61-Dispensing port, 62-Fixed bracket; 51-Internal threaded bend fitting; 141 - Extension, 142 - Guide limit strip, 143 - Guide support component; 211-Main return port; 261-Auxiliary return port; 41-Cell bracket fixing component. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings: The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0022] In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0024] like Figure 1-8As shown, this application discloses an immersion-type self-circulating liquid-cooled battery pack, including a liquid-cooled housing 10 and a battery housing 20 disposed on and connected to the liquid-cooled housing 10. The liquid-cooled housing 10 includes a liquid-cooled housing body, which includes a first bottom plate 11, a first front end plate 12, a first rear end plate 13, two first side plates 14, and a first cover plate 15. The first cover plate 15 is provided with an injection port 151 for injecting coolant, and the first bottom plate 11 is provided with a groove 111. The groove 111 is equipped with a micro pump 30 for pumping the coolant in the liquid cooling box into the battery box. The battery box 20 is equipped with several battery cells 40. That is, the battery box 20 and the liquid box 10 are stacked, which facilitates maintenance and each has its own coolant circulation system. The failure of one unit will not affect the operation and cooling of other units. The coolant is used to immerse the battery cells for cooling. The heat-generating parts or positions are in direct contact with the coolant. The coolant can remove heat more quickly and efficiently, and the transient heat dissipation effect is better.

[0025] Specifically, the groove 111 has an opening lower than the bottom plane of the first base plate 11. The bottom plane of the first base plate is composed of several inclined surfaces, and the base plate of each inclined surface is connected to the groove. Through the above structural design, the coolant can quickly gather into the groove.

[0026] Specifically, the micro pump 30 is connected to the first pipe 50, which extends out of the liquid cooling box 10 and connects to the second pipe 60 inside the battery box 20. An internally threaded elbow joint 51 is provided between the first pipe 50 and the second pipe 60. The second pipe includes a long pipe arranged along the length of the battery box and a short pipe arranged along the width of the battery box and connected to the long pipe. The short pipe is evenly provided with three liquid distribution ports 61, which are located at the end of the battery box away from the first pipe. When the coolant flows into the battery box from the liquid distribution ports, the coolant flows from the end away from the first pipe to the other end, thus carrying away the heat generated when the battery cell is working.

[0027] Specifically, each of the two first side plates 14 has an extension 141 extending towards each other from its top end. Each of the two first side plates 14 has a guide limiting strip 142 on its inner wall corresponding to the extension 141. A guide groove is formed between the guide limiting strip 142 and the corresponding extension 141 to facilitate the insertion of the first cover plate 15. Three guide support members 143 are provided on the first rear end plate 13. The three guide support members 143 are flush with the guide limiting strip 142. Through the above structural design, after the first cover plate is pushed in along the two guide grooves, the front and rear ends of the first cover plate are fixed to the first front end plate and the first rear end plate with fasteners, respectively.

[0028] Specifically, the battery housing 20 includes a battery housing body, which includes a second bottom plate 21, a second front end plate 22, a second rear end plate 23, two second side plates 24, and a second cover plate 25. A partition plate 26 is provided within the battery housing body to divide the cavity of the battery housing body into a first cavity and a first and second cavity. The second bottom plate 21 has a main return port 211 connected to the liquid-cooled housing 10 near the partition plate 26. An auxiliary return port 261 is provided at the bottom of the partition plate 26 near the main return port 211. The size of the auxiliary return port is much smaller than the size of the main return port. When coolant flows into the partition port, the coolant first flows from the auxiliary return port to the main return port. Figure 7 In path A, when the first chamber is full of coolant, the coolant overflows the partition and flows into the second chamber, then flows out from the main return port and returns to the liquid cooling tank, as shown in the diagram. Figure 7 In path B, when the liquid injection stops, the coolant slowly flows from the auxiliary return port to the main return port to continue cooling the battery cell.

[0029] Specifically, a plurality of the battery cells 40 are mounted on the battery cell bracket fixing member 41, and the second pipe 60 is mounted on the battery cell bracket fixing member 41 by a plurality of fixing brackets 62 for fixing the second pipe.

[0030] In summary, this utility model, through the above-described structural design, overcomes the shortcomings of the prior art and features a reasonable structure, excellent heat dissipation, and high practicality.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A submersible self-circulating liquid-cooled battery pack, characterized in that: It includes a liquid-cooled box (10) and a battery box (20) disposed on the liquid-cooled box (10) and connected to the liquid-cooled box (10). A groove (111) is provided at the bottom of the liquid-cooled box (10). A micro pump (30) for pumping the coolant in the liquid-cooled box (10) into the battery box (20) is provided in the groove (111). A number of battery cells (40) are provided in the battery box (20).

2. The immersion self-circulating liquid-cooled battery pack according to claim 1, characterized in that: The liquid cooling box (10) includes a liquid cooling box body, which includes a first bottom plate (11), a first front end plate (12), a first rear end plate (13), two first side plates (14) and a first cover plate (15). The first cover plate (15) is provided with a liquid injection port (151).

3. The immersion self-circulating liquid-cooled battery pack according to claim 2, characterized in that: The groove (111) has an opening that is lower than the bottom plane of the first base plate (11).

4. The immersion self-circulating liquid-cooled battery pack according to claim 3, characterized in that: The bottom plane of the first base plate (11) is composed of several inclined surfaces, and the bottom edge of each inclined surface is connected to the slot.

5. The immersion self-circulating liquid-cooled battery pack according to claim 4, characterized in that: The micro pump (30) is connected to the first pipe (50), which extends out of the liquid cooling box (10) and connects to the second pipe (60) inside the battery box (20). The second pipe (60) has several liquid outlets (61).

6. The immersion self-circulating liquid-cooled battery pack according to claim 5, characterized in that: An internally threaded bend joint (51) is provided between the first pipe (50) and the second pipe (60).

7. The immersion self-circulating liquid-cooled battery pack according to claim 6, characterized in that: The top ends of the two first side plates (14) extend towards each other with an extension (141). The inner walls of the two first side plates (14) are provided with a guide limiting strip (142) corresponding to the extension (141). A guide groove is formed between the guide limiting strip (142) and the corresponding extension (141) to facilitate the insertion of the first cover plate (15).

8. The immersion self-circulating liquid-cooled battery pack according to claim 7, characterized in that: The first rear end plate (13) is provided with a plurality of guide support members (143), and the plurality of guide support members (143) are flush with the guide limit strip (142).

9. The immersion self-circulating liquid-cooled battery pack according to claim 8, characterized in that: The battery housing (20) includes a battery housing body, which includes a second bottom plate (21), a second front end plate (22), a second rear end plate (23), two second side plates (24) and a second cover plate (25).

10. The immersion self-circulating liquid-cooled battery pack according to claim 9, characterized in that: The battery housing is provided with a partition plate (26) to divide the cavity of the battery housing into a first cavity and a first second cavity. The second bottom plate (21) is provided with a main return port (211) connected to the liquid cooling housing (10) near the partition plate (26). The bottom of the partition plate (26) is provided with an auxiliary return port (261) near the main return port (211).

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