Cooling assembly for power battery and power battery module safety device

Abstract

The invention belongs to the technical field of power batteries, particularly relates to a cooling assembly for a power battery and a power battery module safety device, and aims to solve the problems that in the running process of an existing electric vehicle, the power battery can generate a large amount of heat, and if the battery cannot be quickly and effectively cooled, heat is easily accumulated in the power battery, and the power battery module safety device cannot be quickly and effectively cooled. In order to solve the problems in the prior art that the service life of a power battery is influenced, and the power battery is also expanded and even exploded, the invention provides the following scheme: the power battery module comprises a power battery module box; the plurality of accommodating grooves are formed in the power battery module box and are used for accommodating power battery packs; the plurality of groups of liquid cooling mechanisms are respectively arranged in the plurality of accommodating grooves and are used for radiating and cooling the power battery; the side ends of the cooling liquid box and the power battery module box are fixedly connected with a fixed block, and a cooling bin is formed in the fixed block, so that the heat dissipation and cooling efficiency of the power battery is greatly improved, and the temperature of the power battery can be continuously and effectively kept stable.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and particularly to a cooling component for a power battery and a safety device for a power battery module. Background Art

[0002] A power battery is a power source that provides power for tools. Currently, it mostly refers to a storage battery that provides power for electric vehicles such as electric cars, electric trains, and electric bicycles. Battery full technology is an important research field of power batteries.

[0003] During the driving process of an electric vehicle, a large amount of heat is generated by the power battery. If the battery cannot be cooled quickly and effectively, heat is likely to accumulate in the power battery, affecting the lifespan of the power battery. Seriously, it may even cause the power battery to expand or even explode. In the prior art, there are three common heat dissipation methods for power batteries: natural cooling, air cooling, and water cooling. The heat dissipation rates of all three are not as fast as the heat generation rate of the power battery, resulting in the temperature of the power battery not being effectively guaranteed.

[0004] In view of the above problems, this invention document proposes a cooling component for a power battery and a safety device for a power battery module. Summary of the Invention

[0005] The present invention provides a cooling component for a power battery and a safety device for a power battery module, solving the drawbacks in the prior art that during the driving process of an electric vehicle, a large amount of heat is generated by the power battery. If the battery cannot be cooled quickly and effectively, heat is likely to accumulate in the power battery, affecting the lifespan of the power battery. Seriously, it may even cause the power battery to expand or even explode.

[0006] The present invention provides the following technical solutions: A cooling component for a power battery, comprising a power battery module box; a plurality of accommodation grooves, which are all opened in the power battery module box for installing and storing a power battery pack; a plurality of liquid cooling mechanisms, which are respectively arranged in the plurality of accommodation grooves for dissipating heat from the power battery; a coolant tank, a fixing block is fixedly connected to the side end of the power battery module box, a cooling chamber is opened in the fixing block, and the coolant tank is arranged in the cooling chamber for storing the coolant used by the plurality of liquid cooling mechanisms for heat dissipation; a micro refrigeration air conditioner, which is arranged in the fixing block for generating cold air; a power battery module cover, which is arranged on the upper side of the power battery module box, and the power battery module cover and the power battery module box are fixedly connected by buckles; a refrigerant heat dissipation mechanism, which is arranged in the power battery module cover for respectively conveying the cold air in the micro refrigeration air conditioner into the plurality of accommodation grooves to dissipate heat and cool the power battery; a communication mechanism, which is arranged between the power battery module cover and the fixing block for connecting the micro refrigeration air conditioner and the refrigerant heat dissipation mechanism; a coolant heat dissipation mechanism, which is arranged in the cooling chamber for cooling the coolant; a reciprocating mechanism, which is arranged in the fixing block.

[0007] In a possible design, each group of the liquid cooling mechanisms includes two first accommodation grooves opened on both sides in the accommodation groove, two U-shaped liquid cooling belts are fixedly connected in the two first accommodation grooves respectively, the two U-shaped liquid cooling belts are respectively in contact with both sides of the power battery, and water channels for the coolant to flow through are opened in the two U-shaped liquid cooling belts.

[0008] In a possible design, a second accommodation groove and a third accommodation groove are opened at the side end of the power battery module cover, a first communication plate and a second communication plate are respectively fixedly connected in the second accommodation groove and the third accommodation groove, the first communication plate and the second communication plate are respectively fixedly connected to both ends of the plurality of U-shaped liquid cooling belts, the first communication plate and the second communication plate are respectively communicated with the plurality of U-shaped liquid cooling belts, a second groove and a third groove are opened in the fixing block, a second water pump and a first water pump are respectively fixedly connected in the second groove and the third groove, both the second water pump and the first water pump are provided with water inlets and water outlets, the water inlet of the second water pump is communicated with the coolant tank, the water outlet of the second water pump is communicated with the first communication plate, the water inlet of the first water pump is communicated with the second communication plate, and the water outlet of the first water pump is communicated with the cooling chamber.

[0009] In a possible design, the refrigerant heat dissipation mechanism includes a first communication groove opened in the power battery module cover. A plurality of first grooves are opened at the bottom end of the power battery module cover, and the plurality of first grooves respectively match a plurality of accommodation grooves. A plurality of air outlet through holes are opened in the power battery module cover, and the plurality of air outlet through holes are respectively communicated with the first communication groove and the plurality of first grooves.

[0010] In a possible design, the communication mechanism includes a first communication pipe fixedly connected to the bottom end of the micro refrigeration air conditioner. The first communication pipe is communicated with the air outlet of the micro refrigeration air conditioner. A second communication pipe is fixedly connected to the circumferential surface of the first communication pipe. A matching groove is opened at the top end of the fixed block. A matching block matching the matching groove is fixedly connected to the side end of the power battery module cover. A fourth communication pipe communicated with the first communication groove is fixedly connected in the power battery module cover and the matching block. The second communication pipe is respectively communicated with the fourth communication pipe and the first communication pipe. A second hollow plate is fixedly connected in the second communication pipe. A second limiting rod is slidably connected in the second hollow plate. A limiting plate is fixedly connected to the bottom end of the second limiting rod. A sealing plate for sealing the end of the second communication pipe is fixedly connected to the top end of the second limiting rod. A sealing spring is fixedly connected to the bottom end of the sealing plate. The sealing spring is fixedly connected to the top end of the second hollow plate. The sealing spring is sleeved on the circumferential surface of the second limiting rod. A first hollow plate is fixedly connected in the fourth communication pipe. An extrusion rod is fixedly connected to the bottom end of the first hollow plate. The extrusion rod is in contact with the sealing plate.

[0011] In a possible design, the coolant heat dissipation mechanism includes a U-shaped communication plate slidably connected in the cooling bin. A plurality of jet heads are fixedly connected in the U-shaped communication plate. The first communication pipe movably penetrates downward into the cooling bin. A third communication pipe is fixedly connected to the circumferential surface of the first communication pipe. The third communication pipe is respectively communicated with the first communication pipe and the U-shaped communication plate.

[0012] In a possible design, the coolant tank is made of aluminum alloy.

[0013] In a possible design, the reciprocating mechanism includes a fourth groove opened in the fixed block. Two first limiting rods are fixedly connected in the fourth groove. The same threaded plate is slidably connected to the circumferential surfaces of the two first limiting rods. The U-shaped communication plate is fixedly connected to the side end of the threaded plate. A reciprocating lead screw is rotatably connected in the fourth groove. The threaded plate is threadedly connected to the circumferential surface of the reciprocating lead screw. A driving motor is fixedly connected to the top end of the fixed block. The driving motor is connected to the reciprocating lead screw through a coupling.

[0014] In a possible design, second pressing plates in contact with the power battery are fixedly connected to the inner sides of both sides in the plurality of accommodating grooves, and two first pressing plates in contact with the power battery are fixedly connected to each of the plurality of first grooves.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present invention.

[0016] In the present invention, when installing the power battery module cover, it is necessary to align the matching groove and the matching block. After the power battery module cover and the power battery module box are fixedly connected by a buckle, the matching block is also inserted into the matching groove. The pressing rod in the fourth communication pipe will press down the sealing plate, thereby releasing the sealing of the side end of the second communication pipe by the sealing plate. The initial state of the sealing plate is pressed upward by the elastic force of the sealing spring so that it closely adheres to the end of the second communication pipe to achieve the sealing of the end of the second communication pipe. After the pressing rod presses the sealing plate, the mutual communication between the second communication pipe and the fourth communication pipe will be realized, and the cold air discharged from the air outlet of the micro refrigeration air conditioner can enter the first communication groove through the second communication pipe and the fourth communication pipe to cool the power battery with refrigerant; In the present invention, the cold air discharged from the micro refrigeration air conditioner enters the U-shaped communication plate through the first communication pipe and the third communication pipe, and is directly irradiated onto the surface of the coolant tank through a plurality of jet heads provided in the U-shaped communication plate to cool the coolant in the coolant tank. By starting the driving motor to drive the reciprocating lead screw to rotate, the reciprocating lead screw rotates to drive the threaded plate to move up and down reciprocally, and the threaded plate thereby drives the U-shaped communication plate to perform a reciprocating linear motion up and down, so that the upper and lower surfaces of the coolant tank can be cooled by the jet heads, making the cooling of the coolant more uniform; In the present invention, the second water pump pumps the coolant in the coolant tank into the first communication plate, and then enters the plurality of U-shaped liquid cooling belts from the first communication plate respectively. The contact heat exchange with the power battery is realized through the U-shaped water channels of the U-shaped liquid cooling belts to dissipate heat from the power battery. After the heat exchange, the coolant enters the second communication plate. The first water pump pumps the heat-absorbed coolant in the second communication plate and re-transports it to the coolant tank to cool it again; In the present invention, the device contacts the power battery body by means of a liquid cooling mechanism, exchanges heat with the power battery through the coolant to take away heat, and at the same time uses a micro-refrigeration air conditioner to produce cold air, and conveys the cold air into the power battery module cover through a refrigerant heat dissipation mechanism to achieve the cooling of the power battery. Moreover, the dual heat dissipation greatly improves the heat dissipation and cooling efficiency of the power battery, enables the temperature of the power battery to be continuously and effectively maintained stable. At the same time, the cold air of the micro-refrigeration air conditioner is divided into two parts, one part is used for refrigerant heat dissipation, and the other part is conveyed into the cooling bin to cool the coolant that exchanges heat with the power battery, preventing the low heat dissipation rate of the coolant and preventing the problem of low heat dissipation efficiency caused by the high temperature of the coolant that enters the U-shaped liquid cooling belt and exchanges heat with the power battery, and can ensure that the coolant can still maintain a relatively low temperature when continuously working. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The front perspective view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 2 The first partial perspective view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 3 The first partial cross-sectional view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 4 The second partial perspective view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 5 The second partial cross-sectional view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 6 The third partial perspective view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 7 The third partial cross-sectional view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 8 The fourth partial cross-sectional view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 9 The fifth partial cross-sectional view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 10 The fourth partial perspective view of a cooling component for a power battery and a power battery module safety device provided by an embodiment of the present invention; Figure 11 The fifth partial perspective view of a cooling component for a power battery and a safety device for a power battery module provided by an embodiment of the present invention.

[0018] Reference numerals: 1. Power battery module box; 2. Power battery module cover; 3. Fixed block; 4. Accommodating groove; 5. First groove; 6. First pressing plate; 7. First communication groove; 8. U-shaped liquid cooling belt; 9. Second pressing plate; 10. Miniature refrigeration air conditioner; 11. Driving motor; 12. Matching groove; 13. Matching block; 14. First communication plate; 15. Second communication plate; 16. First accommodating groove; 17. Second groove; 18. Third groove; 19. First water pump; 20. Second water pump; 21. First communication pipe; 22. Second communication pipe; 23. Third communication pipe; 24. Second accommodating groove; 25. Third accommodating groove; 26. Fourth groove; 27. First limiting rod; 28. Threaded plate; 29. Reciprocating lead screw; 30. Cooling chamber; 31. Cooling liquid tank; 32. U-shaped communication plate; 33. Jet head; 34. Fourth communication pipe; 35. First hollow plate; 36. Extrusion rod; 37. Second hollow plate; 38. Limiting plate; 39. Sealing spring; 40. Second limiting rod; 41. Sealing plate; 42. Air outlet through hole. Detailed implementation manners

[0019] The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct communication or an indirect communication through an intermediate medium. Among them, "fixing" means that they are connected to each other and the relative positional relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only for reference to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present invention.

[0021] In the embodiments of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0022] In the embodiments of the present invention, "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0023] References to "one embodiment" or "some embodiments" etc. described in this specification mean that specific features, structures, or characteristics described in connection with that embodiment are included in one or more embodiments of the present invention. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but rather mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprise", "include", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0024] Embodiment 1 Refer to Figures 1 - 11 , a cooling assembly for a power battery, comprising a power battery module box 1; a plurality of accommodation grooves 4, all of the plurality of accommodation grooves 4 are opened in the power battery module box 1 for installing and storing a power battery pack; a plurality of groups of liquid cooling mechanisms, the plurality of groups of liquid cooling mechanisms are respectively arranged in the plurality of accommodation grooves 4 for dissipating heat from the power battery; a coolant tank 31, a fixing block 3 is fixedly connected to the side end of the power battery module box 1, a cooling chamber 30 is opened in the fixing block 3, and the coolant tank 31 is arranged in the cooling chamber 30 for storing the coolant used by the plurality of groups of liquid cooling mechanisms for heat dissipation; a micro refrigeration air conditioner 10, the micro refrigeration air conditioner 10 is arranged in the fixing block 3 for generating cold air; a power battery module cover 2, the power battery module cover 2 is arranged on the upper side of the power battery module box 1, and the power battery module cover 2 and the power battery module box 1 are fixedly connected by buckles; a refrigerant heat dissipation mechanism, the refrigerant heat dissipation mechanism is arranged in the power battery module cover 2 for respectively delivering the cold air in the micro refrigeration air conditioner 10 into the plurality of accommodation grooves 4 to dissipate heat from the power battery; a communication mechanism, the communication mechanism is arranged between the power battery module cover 2 and the fixing block 3 for connecting the micro refrigeration air conditioner 10 and the refrigerant heat dissipation mechanism; a coolant heat dissipation mechanism, the coolant heat dissipation mechanism is arranged in the cooling chamber 30 for cooling the coolant; a reciprocating mechanism, the reciprocating mechanism is arranged in the fixing block 3.

[0025] The above technical solution can achieve the following: making contact with the power battery body by means of the liquid cooling mechanism, taking away heat through heat exchange between the coolant and the power battery, and at the same time using the micro refrigeration air conditioner 10 to produce cold air, and transporting the cold air to the inside of the power battery module cover 2 through the refrigerant heat dissipation mechanism to achieve the cooling of the power battery. Moreover, the dual heat dissipation greatly improves the heat dissipation and cooling efficiency of the power battery, enabling the temperature of the power battery to be continuously and effectively maintained stable. At the same time, the cold air of the micro refrigeration air conditioner 10 is divided into two parts, one part is used for refrigerant heat dissipation, and the other part is transported into the cooling chamber 30 to cool down the coolant that exchanges heat with the power battery, preventing the low heat dissipation rate of the coolant and preventing the problem of low heat dissipation efficiency caused by the high temperature of the coolant that enters the U-shaped liquid cooling belt 8 and exchanges heat with the power battery, and being able to ensure that the coolant can still maintain a low temperature in continuous operation.

[0026] Refer to Figure 4 、 Figure 6 and Figure 7 Each liquid cooling mechanism includes two first accommodation grooves 16 opened on both sides in the accommodation groove 4. U-shaped liquid cooling belts 8 are fixedly connected in both of the two first accommodation grooves 16. The two U-shaped liquid cooling belts 8 are respectively in contact with both sides of the power battery, and water channels for the coolant to flow through are opened in both of the two U-shaped liquid cooling belts 8.

[0027] The above technical solution can achieve the technical effect that the coolant enters the first communication plate 14, and then enters the multiple U-shaped liquid cooling belts 8 respectively from the first communication plate 14, and realizes contact heat exchange with the power battery through the U-shaped water channels of the U-shaped liquid cooling belts 8 to dissipate heat from the power battery, and the coolant after heat exchange enters the second communication plate 15.

[0028] Refer to Figure 3 、 Figure 9 and Figure 10 The refrigerant heat dissipation mechanism includes a first communication groove 7 opened in the power battery module cover 2. A plurality of first grooves 5 are opened at the bottom end of the power battery module cover 2. The plurality of first grooves 5 respectively match the plurality of accommodation grooves 4. A plurality of air outlet through holes 42 are opened in the power battery module cover 2, and the plurality of air outlet through holes 42 are respectively communicated with the first communication groove 7 and the plurality of first grooves 5.

[0029] The above technical solution can achieve the technical effect that after the second communication pipe 22 and the fourth communication pipe 34 are communicated with each other, the cold air discharged from the air outlet of the micro refrigeration air conditioner 10 can enter the first communication groove 7 through the second communication pipe 22 and the fourth communication pipe 34 to achieve refrigerant cooling of the power battery.

[0030] Refer to Figure 9 and Figure 10, the connecting mechanism includes a first connecting pipe 21 fixedly connected to the bottom end of the micro-refrigeration air conditioner 10. The first connecting pipe 21 is communicated with the air outlet of the micro-refrigeration air conditioner 10. A second connecting pipe 22 is fixedly connected to the circumferential surface of the first connecting pipe 21. A matching groove 12 is formed at the top end of the fixed block 3. A matching block 13 matching with the matching groove 12 is fixedly connected to the side end of the power battery module cover 2. A fourth connecting pipe 34 communicated with the first connecting groove 7 is fixedly connected inside the power battery module cover 2 and the matching block 13. The second connecting pipe 22 is respectively communicated with the fourth connecting pipe 34 and the first connecting pipe 21. A second hollow plate 37 is fixedly connected inside the second connecting pipe 22. A second limiting rod 40 is slidably connected inside the second hollow plate 37. A limiting plate 38 is fixedly connected to the bottom end of the second limiting rod 40. A sealing plate 41 for sealing the end of the second connecting pipe 22 is fixedly connected to the top end of the second limiting rod 40. A sealing spring 39 is fixedly connected to the bottom end of the sealing plate 41. The sealing spring 39 is fixedly connected to the top end of the second hollow plate 37. The sealing spring 39 is sleeved on the circumferential surface of the second limiting rod 40. A first hollow plate 35 is fixedly connected inside the fourth connecting pipe 34. An extrusion rod 36 is fixedly connected to the bottom end of the first hollow plate 35. The extrusion rod 36 is in contact with the sealing plate 41.

[0031] The above technical solution can achieve that when installing the power battery module cover 2, it is necessary to align the matching groove 12 and the matching block 13. After the power battery module cover 2 and the power battery module box 1 are fixedly connected by a buckle, the matching block 13 is also inserted into the matching groove 12. The extrusion rod 36 in the fourth connecting pipe 34 will downwardly extrude the sealing plate 41, thereby releasing the sealing of the side end of the second connecting pipe 22 by the sealing plate 41. The initial state of the sealing plate 41 is upwardly extruded by the elastic force of the sealing spring 39, so that it closely adheres to the end of the second connecting pipe 22 to achieve the sealing of the end of the second connecting pipe 22. After the extrusion rod 36 extrudes the sealing plate 41, the technical effect of mutual communication between the second connecting pipe 22 and the fourth connecting pipe 34 can be achieved.

[0032] Refer to Figure 9 , the coolant heat dissipation mechanism includes a U-shaped connecting plate 32 slidably connected inside the cooling bin 30. A plurality of air jet heads 33 are fixedly connected inside the U-shaped connecting plate 32. The first connecting pipe 21 movably penetrates downward into the cooling bin 30. A third connecting pipe 23 is fixedly connected to the circumferential surface of the first connecting pipe 21. The third connecting pipe 23 is respectively communicated with the first connecting pipe 21 and the U-shaped connecting plate 32.

[0033] The above technical solution can achieve the technical effect that the cold air discharged from the micro-refrigeration air conditioner 10 enters the U-shaped connecting plate 32 through the first connecting pipe 21 and the third connecting pipe 23, and is directly irradiated onto the surface of the coolant tank 31 through a plurality of air jet heads 33 provided inside the U-shaped connecting plate 32 to cool the coolant in the coolant tank 31.

[0034] Reference Figure 8 and Figure 9 Figure 8 and Figure 9 , the reciprocating mechanism includes a fourth groove 26 opened in the fixed block 3. Two first limiting rods 27 are fixedly connected in the fourth groove 26. The circumferential surfaces of the two first limiting rods 27 are slidably connected with the same threaded plate 28. The U-shaped communication plate 32 is fixedly connected to the side end of the threaded plate 28. A reciprocating lead screw 29 is rotatably connected in the fourth groove 26. The threaded plate 28 is threadedly connected to the circumferential surface of the reciprocating lead screw 29. The top end of the fixed block 3 is fixedly connected with a driving motor 11. The driving motor 11 is connected to the reciprocating lead screw 29 through a coupling.

[0035] and

[0035] . The above technical solution can achieve the technical effect that by starting the driving motor 11 to drive the reciprocating lead screw 29 to rotate, the reciprocating lead screw 29 rotates to drive the threaded plate 28 to move up and down reciprocally, and the threaded plate 28 thereby drives the U-shaped communication plate 32 to perform a linear reciprocating motion up and down, so that the upper and lower surfaces of the coolant tank 31 can be cooled by the jet head 33, making the cooling of the coolant more uniform.

[0036] Embodiment 2 Reference Figures 1 - 11 and Figures 1 - 11 , a cooling assembly for a power battery includes a power battery module box 1; a plurality of accommodation grooves 4, and the plurality of accommodation grooves 4 are all opened in the power battery module box 1 for installing and storing power battery packs; a plurality of liquid cooling mechanisms, and the plurality of liquid cooling mechanisms are respectively arranged in the plurality of accommodation grooves 4 for dissipating heat from the power battery; a coolant tank 31, a fixed block 3 is fixedly connected to the side end of the power battery module box 1, a cooling chamber 30 is opened in the fixed block 3, and the coolant tank 31 is arranged in the cooling chamber 30 for storing the coolant used by the plurality of liquid cooling mechanisms for heat dissipation; a micro refrigeration air conditioner 10, and the micro refrigeration air conditioner 10 is arranged in the fixed block 3 for generating cold air; a power battery module cover 2, and the power battery module cover 2 is arranged on the upper side of the power battery module box 1. The power battery module cover 2 and the power battery module box 1 are fixedly connected by buckles; a refrigerant heat dissipation mechanism, and the refrigerant heat dissipation mechanism is arranged in the power battery module cover 2 for respectively conveying the cold air in the micro refrigeration air conditioner 10 into the plurality of accommodation grooves 4 for dissipating heat from the power battery; a communication mechanism, and the communication mechanism is arranged between the power battery module cover 2 and the fixed block 3 for connecting the micro refrigeration air conditioner 10 and the refrigerant heat dissipation mechanism; a coolant heat dissipation mechanism, and the coolant heat dissipation mechanism is arranged in the cooling chamber 30 for cooling the coolant; a reciprocating mechanism, and the reciprocating mechanism is arranged in the fixed block 3.

[0037] The above technical solution can achieve the following: the liquid cooling mechanism is in contact with the power battery body, heat is taken away through heat exchange between the coolant and the power battery, and at the same time, the micro-refrigeration air conditioner 10 is used to produce cold air, and the cold air is transported to the inside of the power battery module cover 2 through the refrigerant heat dissipation mechanism to realize the cooling of the power battery. Moreover, the dual heat dissipation greatly improves the heat dissipation and cooling efficiency of the power battery, enabling the temperature of the power battery to be continuously and effectively maintained stable. At the same time, the cold air of the micro-refrigeration air conditioner 10 is divided into two parts, one part is used for refrigerant heat dissipation, and the other part is transported into the cooling chamber 30 to cool the coolant that exchanges heat with the power battery, preventing the low heat dissipation rate of the coolant and preventing the problem of low heat dissipation efficiency caused by the high temperature of the coolant that enters the U-shaped liquid cooling belt 8 and exchanges heat with the power battery, and being able to ensure that the coolant can still maintain a relatively low temperature during continuous operation.

[0038] Referring to Figure 4 、 Figure 6 and Figure 7 , each group of liquid cooling mechanisms includes two first accommodation grooves 16 opened on both sides inside the accommodation groove 4. U-shaped liquid cooling belts 8 are fixedly connected inside both first accommodation grooves 16. The two U-shaped liquid cooling belts 8 are respectively in contact with both sides of the power battery. Water channels for the coolant to flow through are opened inside both U-shaped liquid cooling belts 8.

[0039] The above technical solution can achieve the technical effect that the coolant enters the first communication plate 14, and then enters the multiple U-shaped liquid cooling belts 8 respectively from the first communication plate 14, and realizes contact heat exchange with the power battery through the U-shaped water channels of the U-shaped liquid cooling belt 8 to dissipate heat from the power battery, and the coolant after heat exchange enters the second communication plate 15.

[0040] Referring to Figure 5 and Figure 6 , a second accommodation groove 24 and a third accommodation groove 25 are opened at the side end of the power battery module cover 2. A first communication plate 14 and a second communication plate 15 are respectively fixedly connected inside the second accommodation groove 24 and the third accommodation groove 25. The first communication plate 14 and the second communication plate 15 are respectively fixedly connected to both ends of the multiple U-shaped liquid cooling belts 8. The first communication plate 14 and the second communication plate 15 are respectively in communication with the multiple U-shaped liquid cooling belts 8. A second groove 17 and a third groove 18 are opened inside the fixed block 3. A second water pump 20 and a first water pump 19 are respectively fixedly connected inside the second groove 17 and the third groove 18. Both the second water pump 20 and the first water pump 19 are provided with water inlets and water outlets. The water inlet of the second water pump 20 is in communication with the coolant tank 31, the water outlet of the second water pump 20 is in communication with the first communication plate 14, the water inlet of the first water pump 19 is in communication with the second communication plate 15, and the water outlet of the first water pump 19 is in communication with the cooling chamber 30.

[0041] The above technical solution can achieve the technical effect that the second water pump 20 extracts the coolant in the coolant tank 31 into the first communication plate 14, and then enters the plurality of U-shaped liquid cooling belts 8 from the first communication plate 14 respectively. The contact heat exchange with the power battery is realized through the U-shaped water channels of the U-shaped liquid cooling belts 8 to dissipate heat from the power battery. The coolant after heat exchange enters the second communication plate 15, and the first water pump 19 extracts the heat-absorbed coolant in the second communication plate 15, transports it back to the coolant tank 31, and then cools it again.

[0042] Refer to Figure 3 、 Figure 9 and Figure 10 Refer to

[0043] The above technical solution can achieve the technical effect that after the second communication pipe 22 and the fourth communication pipe 34 are interconnected, the cold air discharged from the air outlet of the micro-refrigeration air conditioner 10 can enter the first communication groove 7 through the second communication pipe 22 and the fourth communication pipe 34 to achieve refrigerant cooling of the power battery.

[0044] Refer to Figure 9 and Figure 10 Refer to

[0045] In the above technical solution, when installing the power battery module cover 2, it is necessary to align the matching groove 12 and the matching block 13. After the power battery module cover 2 and the power battery module box 1 are fixedly connected by a buckle, the matching block 13 is also embedded into the matching groove 12. The pressing rod 36 in the fourth communication pipe 34 will press down the sealing plate 41, thereby releasing the seal of the sealing plate 41 on the side end of the second communication pipe 22. The initial state of the sealing plate 41 is pressed upward by the elastic force of the sealing spring 39, so that it is close to the end of the second communication pipe 22 to realize the sealing of the end of the second communication pipe 22. After the pressing rod 36 presses the sealing plate 41, the technical effect of mutual communication between the second communication pipe 22 and the fourth communication pipe 34 can be achieved.

[0046] Referring to Figure 9 , the coolant heat dissipation mechanism includes a U-shaped communication plate 32 slidably connected in the cooling chamber 30. A plurality of jet heads 33 are fixedly connected in the U-shaped communication plate 32. The first communication pipe 21 movably penetrates downward into the cooling chamber 30. A third communication pipe 23 is fixedly connected to the circumferential surface of the first communication pipe 21. The third communication pipe 23 is respectively communicated with the first communication pipe 21 and the U-shaped communication plate 32.

[0047] The above technical solution can achieve the technical effect that the cold air discharged from the micro-refrigeration air conditioner 10 enters the U-shaped communication plate 32 through the first communication pipe 21 and the third communication pipe 23, and is directly irradiated to the surface of the coolant tank 31 through a plurality of jet heads 33 provided in the U-shaped communication plate 32 to cool the coolant in the coolant tank 31.

[0048] The coolant tank 31 is made of aluminum alloy, which is not shown in the figure.

[0049] Aluminum alloy has a high heat dissipation rate and can quickly complete the cooling of the coolant.

[0050] Referring to Figure 8 and Figure 9 , the reciprocating mechanism includes a fourth groove 26 opened in the fixed block 3. Two first limiting rods 27 are fixedly connected in the fourth groove 26. The circumferential surfaces of the two first limiting rods 27 are slidably connected with the same threaded plate 28. The U-shaped communication plate 32 is fixedly connected to the side end of the threaded plate 28. A reciprocating screw rod 29 is rotatably connected in the fourth groove 26. The threaded plate 28 is threadedly connected to the circumferential surface of the reciprocating screw rod 29. A driving motor 11 is fixedly connected to the top of the fixed block 3. The driving motor 11 is connected to the reciprocating screw rod 29 through a coupling.

[0051] The above technical solution can achieve the technical effect that by starting the driving motor 11 to drive the reciprocating lead screw 29 to rotate, the rotation of the reciprocating lead screw 29 drives the threaded plate 28 to move up and down reciprocally, and the threaded plate 28 thereby drives the U-shaped connecting plate 32 to perform a linear reciprocating motion up and down, so that the upper and lower surfaces of the coolant tank 31 can be cooled by the jet head 33, making the cooling of the coolant more uniform.

[0052] Referring to Figure 2 and Figure 3 On both inner sides of the plurality of accommodating grooves 4, a second pressing plate 9 in contact with the power battery is fixedly connected, and two first pressing plates 6 in contact with the power battery are fixedly connected in each of the plurality of first grooves 5.

[0053] The above technical solution can achieve the technical effect of fixing the position of the power battery to keep it stable, and at the same time enabling there to be more gaps around the power battery, facilitating the cold air of the refrigerant heat dissipation mechanism to better wrap the power battery.

[0054] However, as is well known to those skilled in the art, the working principles and wiring methods of the micro refrigeration air conditioner 10 and the driving motor 11 are common knowledge, and they both belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0055] The working principle and usage process of this technical solution are as follows: When installing the power battery module cover 2, it is necessary to align the matching groove 12 and the matching block 13. After the power battery module cover 2 and the power battery module box 1 are fixedly connected by a buckle, the matching block 13 is also embedded into the matching groove 12. The extrusion rod 36 in the fourth communication pipe 34 will squeeze the sealing plate 41 downward, thereby releasing the seal of the sealing plate 41 on the side end of the second communication pipe 22. The initial state of the sealing plate 41 is upwardly squeezed by the elastic force of the sealing spring 39, making it closely adhere to the end of the second communication pipe 22 to achieve the sealing of the end of the second communication pipe 22. After the extrusion rod 36 squeezes the sealing plate 41, the mutual communication between the second communication pipe 22 and the fourth communication pipe 34 will be realized. The cold air discharged from the air outlet of the micro refrigeration air conditioner 10 can enter the first communication groove 7 through the second communication pipe 22 and the fourth communication pipe 34 to cool the refrigerant of the power battery. The cold air discharged from the micro refrigeration air conditioner 10 passes through the first communication pipe 21 and the third communication pipe 23 and enters the U-shaped communication plate 32, and is directly irradiated onto the surface of the coolant tank 31 through a plurality of jet nozzles 33 provided in the U-shaped communication plate 32 to cool the coolant in the coolant tank 31. By starting the driving motor 11 to drive the reciprocating screw rod 29 to rotate, the reciprocating screw rod 29 rotates to drive the threaded plate 28 to move up and down reciprocally, and the threaded plate 28 thereby drives the U-shaped communication plate 32 to perform a reciprocating linear motion up and down, so that the upper and lower surfaces of the coolant tank 31 can be cooled by the jet nozzles 33, making the cooling of the coolant more uniform. The second water pump 20 pumps the coolant in the coolant tank 31 into the first communication plate 14, and then enters a plurality of U-shaped liquid cooling belts 8 respectively from the first communication plate 14, and realizes the contact heat exchange with the power battery through the U-shaped water channels of the U-shaped liquid cooling belts 8 to dissipate heat from the power battery. The coolant after heat exchange enters the second communication plate 15, and the first water pump 19 pumps the heat-absorbed coolant in the second communication plate 15 and re-transports it to the coolant tank 31 for cooling again.

[0056] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention; without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A cooling component for a power battery, characterized in that, Comprising: Power battery module box (1); Multiple accommodation grooves (4), which are all opened in the power battery module box (1) for installing and storing power battery packs; Multiple groups of liquid cooling mechanisms, which are respectively arranged in multiple accommodation grooves (4) for dissipating heat and cooling the power batteries; Coolant tank (31), a fixing block (3) is fixedly connected to the side end of the power battery module box (1), a cooling chamber (30) is opened in the fixing block (3), and the coolant tank (31) is arranged in the cooling chamber (30) for storing the coolant used by multiple groups of liquid cooling mechanisms for heat dissipation and cooling; Miniature refrigeration air conditioner (10), which is arranged in the fixing block (3) for manufacturing cold air; Power battery module cover (2), the power battery module cover (2) is arranged on the upper side of the power battery module box (1), and the power battery module cover (2) and the power battery module box (1) are fixedly connected by buckles; Refrigerant heat dissipation mechanism, which is arranged in the power battery module cover (2) for respectively conveying the cold air in the miniature refrigeration air conditioner (10) into multiple accommodation grooves (4) to dissipate heat and cool the power batteries; Connecting mechanism, which is arranged between the power battery module cover (2) and the fixing block (3) for connecting the miniature refrigeration air conditioner (10) and the refrigerant heat dissipation mechanism; Coolant heat dissipation mechanism, which is arranged in the cooling chamber (30) for cooling the coolant; Reciprocating mechanism, which is arranged in the fixing block (3).

2. The cooling component for a power battery according to claim 1, characterized in that Each group of the liquid cooling mechanisms includes two first accommodation grooves (16) opened on both sides in the accommodation groove (4), U-shaped liquid cooling belts (8) are fixedly connected in both of the two first accommodation grooves (16), the two U-shaped liquid cooling belts (8) are respectively in contact with both sides of the power battery, and water channels for the coolant to flow through are opened in both of the two U-shaped liquid cooling belts (8).

3. The cooling component for a power battery according to claim 2, characterized in that, A second accommodation groove (24) and a third accommodation groove (25) are opened at the side end of the power battery module cover (2), a first connecting plate (14) and a second connecting plate (15) are respectively fixedly connected in the second accommodation groove (24) and the third accommodation groove (25), the first connecting plate (14) and the second connecting plate (15) are respectively fixedly connected to both ends of multiple U-shaped liquid cooling belts (8), the first connecting plate (14) and the second connecting plate (15) are respectively communicated with multiple U-shaped liquid cooling belts (8), a second groove (17) and a third groove (18) are opened in the fixing block (3), a second water pump (20) and a first water pump (19) are respectively fixedly connected in the second groove (17) and the third groove (18), both the second water pump (20) and the first water pump (19) are provided with water inlets and outlets, the water inlet of the second water pump (20) is communicated with the coolant tank (31), the water outlet of the second water pump (20) is communicated with the first connecting plate (14), the water inlet of the first water pump (19) is communicated with the second connecting plate (15), and the water outlet of the first water pump (19) is communicated with the cooling chamber (30).

4. The cooling component for a power battery according to claim 3, characterized in that, The refrigerant heat dissipation mechanism includes a first communication groove (7) formed in the power battery module cover (2). A plurality of first grooves (5) are formed at the bottom end of the power battery module cover (2). The plurality of first grooves (5) are respectively matched with a plurality of accommodation grooves (4). A plurality of air outlet through holes (42) are formed in the power battery module cover (2). The plurality of air outlet through holes (42) are respectively communicated with the first communication groove (7) and the plurality of first grooves (5).

5. The cooling assembly for a power battery according to claim 4, wherein, The communication mechanism includes a first communication pipe (21) fixedly connected to the bottom end of the micro refrigeration air conditioner (10). The first communication pipe (21) is communicated with the air outlet of the micro refrigeration air conditioner (10). A second communication pipe (22) is fixedly connected to the circumferential surface of the first communication pipe (21). A matching groove (12) is formed at the top end of the fixed block (3). A matching block (13) matched with the matching groove (12) is fixedly connected to the side end of the power battery module cover (2). A fourth communication pipe (34) communicated with the first communication groove (7) is fixedly connected in the power battery module cover (2) and the matching block (13). The second communication pipe (22) is respectively communicated with the fourth communication pipe (34) and the first communication pipe (21). A second hollow plate (37) is fixedly connected in the second communication pipe (22). A second limiting rod (40) is slidably connected in the second hollow plate (37). A limiting plate (38) is fixedly connected to the bottom end of the second limiting rod (40). A sealing plate (41) for sealing the end of the second communication pipe (22) is fixedly connected to the top end of the second limiting rod (40). A sealing spring (39) is fixedly connected to the bottom end of the sealing plate (41). The sealing spring (39) is fixedly connected to the top end of the second hollow plate (37). The sealing spring (39) is sleeved on the circumferential surface of the second limiting rod (40). A first hollow plate (35) is fixedly connected in the fourth communication pipe (34). An extrusion rod (36) is fixedly connected to the bottom end of the first hollow plate (35). The extrusion rod (36) is in contact with the sealing plate (41).

6. The cooling component for a power battery according to claim 5, wherein The coolant heat dissipation mechanism includes a U-shaped communication plate (32) slidably connected in the cooling chamber (30). A plurality of jet heads (33) are fixedly connected in the U-shaped communication plate (32). The first communication pipe (21) extends downward and movably penetrates into the cooling chamber (30). A third communication pipe (23) is fixedly connected to the circumferential surface of the first communication pipe (21). The third communication pipe (23) is respectively communicated with the first communication pipe (21) and the U-shaped communication plate (32).

7. The cooling assembly for a power battery according to claim 6, characterized in that, The coolant tank (31) is made of aluminum alloy.

8. The cooling component for a power battery according to claim 7, characterized in that, The reciprocating mechanism includes a fourth groove (26) formed in the fixed block (3). Two first limiting rods (27) are fixedly connected in the fourth groove (26). The circumferential surfaces of the two first limiting rods (27) are slidably connected with the same threaded plate (28). The U-shaped communicating plate (32) is fixedly connected to the side end of the threaded plate (28). A reciprocating lead screw (29) is rotatably connected in the fourth groove (26). The threaded plate (28) is threadedly connected to the circumferential surface of the reciprocating lead screw (29). A driving motor (11) is fixedly connected to the top of the fixed block (3). The driving motor (11) is connected to the reciprocating lead screw (29) through a coupling.

9. The cooling assembly for a power battery according to claim 8, wherein, Two first pressing plates (6) in contact with the power battery are fixedly connected to the inner sides of both sides in each of the plurality of accommodating grooves (4). Two first pressing plates (6) in contact with the power battery are fixedly connected to each of the plurality of first grooves (5).

10. A safety device for a power battery module, characterized in that, It includes a cooling assembly for a power battery according to any one of claims 1-9.

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