Battery pack heat management device and battery pack

Abstract

The utility model relates to the technical field of battery pack thermal management systems, and discloses a battery pack thermal management device and a battery pack, the battery pack thermal management device comprises a liquid cooling plate and a shell, the liquid cooling plate is arranged between two adjacent batteries, and the shell covers the outer side surfaces of the liquid cooling plate and the batteries and is used for protecting the liquid cooling plate and the batteries; a runner plate of the liquid cooling plate is provided with two groups of cooling runners which are symmetrically arranged up and down and are enclosed by convex ribs, the upper end and the lower end of the liquid cooling plate are both provided with bulges extending outwards, and the bulges on the two sides are respectively and correspondingly provided with a liquid inlet and a liquid outlet; the two groups of cooling flow channels are arranged in the flow channel cavity of the liquid cooling plate, and each group of cooling flow channels is respectively provided with one liquid inlet and one liquid outlet, so that compared with an independent cooling flow channel in the traditional technology, the channel flow is shortened, cooling liquid entering from the two liquid inlets can quickly pass through the cooling flow channels, the circulation is quickened, and the cooling efficiency is improved. And the temperature difference of the cooling liquid at the liquid inlet and the liquid outlet is reduced, so that the heat dissipation effect of the whole battery can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pack thermal management systems, and in particular relates to a battery pack thermal management device and a battery pack. Background Art

[0002] The battery pack thermal management system mainly includes the battery pack, liquid cooling plate, coolant circulation system, temperature sensor, battery management system, liquid pump, radiator, etc. The battery pack fits tightly with the liquid cooling plate so that the battery pack can dissipate heat quickly. The liquid cooling plate is connected to the coolant circulation system. The coolant is extracted from the liquid cooling plate by the circulation pump and recycled after being dissipated by the radiator. The coolant circulation system is connected to the liquid pump, which is powered by the liquid pump to circulate the coolant in the system. The liquid pump is connected to the fan, which accelerates the air flow to improve the heat dissipation efficiency. The fan is connected to the radiator, and the airflow generated by the fan dissipates heat from the radiator. The battery management system is connected to the temperature sensor to monitor the temperature inside the battery pack in real time. The temperature sensor is closely connected to the battery pack to monitor the temperature inside the battery pack in real time. Through the interconnection and collaborative work of the above components, the battery pack thermal management system can achieve effective heat dissipation of the battery pack, ensure that the battery pack is within the normal operating temperature range, and extend the service life of the battery pack.

[0003] In traditional technology, the cooling channel on the liquid cooling plate in the thermal management system of the battery pack is often an independent channel, that is, only one liquid inlet and liquid outlet are set to connect with the inlet and outlet of the cooling channel. In this way, the cooling channel adopts a bottom-in and bottom-out flow direction, so that the coolant flows slowly in the cooling channel. For battery cooling, since the coolant can only flow into the cooling channel from one liquid inlet and then flow out along the liquid outlet, the flow rate of the coolant in the independent channel becomes longer, making the flow slow, resulting in uneven temperature distribution in the cooling channel, and the temperature in some areas will be high, affecting the overall heat dissipation effect. The coolant can only flow into multiple channels from one direction and cannot flow effectively. Since the coolant flow rate in the cooling channel is slow, the heat can only be taken away for a long time, resulting in untimely heat dissipation. The cooling channel with this channel design makes the overall heat dissipation effect poor, which is easy to cause battery overheating and affect the performance and life of the battery. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a battery pack thermal management device and a battery pack.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A battery pack thermal management device comprises a liquid cooling plate and a shell, wherein the liquid cooling plate is arranged between two adjacent batteries, and the shell covers the outer side surfaces of the liquid cooling plate and the batteries and is used to protect the liquid cooling plate and the batteries.

[0007] The liquid cooling plate comprises a flow channel plate and a sealing plate connected to the flow channel plate, wherein the sealing plate and the flow channel plate are connected to form a flow channel chamber, and the flow channel plate is provided with two groups of cooling flow channels which are symmetrically arranged up and down and surrounded by convex ribs, and the upper and lower ends of the liquid cooling plate are provided with protrusions extending outward, and the protrusions on both sides are respectively provided with a liquid inlet and a liquid outlet;

[0008] Two groups of cooling channels are arranged in the channel chamber of the liquid cooling plate, and each group of cooling channels is respectively equipped with a liquid inlet and a liquid outlet. The two groups of cooling channels are arranged on the channel plate. Compared with the independent cooling channels of the traditional technology, the channel flow is shortened, and the coolant entering through the two liquid inlets can quickly pass through the cooling channels, so that the circulation becomes faster, and the temperature difference of the coolant at the liquid inlet and the liquid outlet becomes smaller, so that the temperature distribution of the coolant in the cooling channel is not much different, and there will be no uneven temperature distribution in the cooling channel and the temperature in some areas will be high, which can improve the heat dissipation effect of the overall battery.

[0009] The housing includes a front housing and a rear housing located at two ends and a plurality of protective housings located between the front housing and the rear housing and covering the outer sides of the liquid cooling plate and the battery;

[0010] The protective shell is provided with a plug-in slot for inserting a liquid cooling plate, and positioning slots for positioning and inserting a battery are provided on both sides of the plug-in slot. The liquid cooling plate is inserted into the plug-in slot located at the center of the inner side of the shell, and the battery is inserted into an installation chamber surrounded by the positioning slots on two adjacent protective shells.

[0011] The plug-in slots and positioning slots on the protective shell facilitate the installation and positioning of the liquid cooling plate and battery.

[0012] Preferably, both the liquid inlet and the liquid outlet on the sealing plate are provided with guide ports leading to the flow channel chamber, so as to facilitate the incoming coolant to flow into the cooling flow channel through the guide ports.

[0013] Preferably, one side of the protective shell is provided with a concave groove for the protrusion to fit and insert for positioning, and the side of the protective shell facing away from the concave groove is provided with a protrusion that has the same size as the concave groove. The concave groove is provided with a liquid delivery port that passes through the protective shell and the protrusion, and the liquid delivery port is connected to the liquid inlet or the liquid outlet, and the size of the liquid delivery port is consistent with the size of the liquid inlet and the liquid outlet.

[0014] When two adjacent protective shells are docked, the protrusion on one protective shell can be inserted into the concave groove, and the liquid delivery port can be docked with the liquid inlet or the liquid outlet, which is convenient for the liquid inlet and the liquid delivery port to dock to form a liquid delivery channel, and convenient for the liquid outlet and the liquid delivery port to dock to form a liquid outlet channel.

[0015] Preferably, a placement groove for placing a sealing gasket is provided on the protrusion and located at the outer periphery of the liquid delivery port, and the sealing gasket is placed in the placement groove to improve the sealing effect when two adjacent protective shells are connected.

[0016] Preferably, concave waist-shaped grooves are provided on both sides of the protective shell, and mounting holes are provided in the concave waist-shaped grooves. The front shell, the rear shell and the protective shell are locked and fixed together by bolts passing through the mounting holes, so as to facilitate the assembly of the liquid cooling plate, the outer shell and the battery together.

[0017] Preferably, a waist-shaped pad inserted into the concave waist-shaped groove is provided between two adjacent protective shells and between the protective shell and the front shell or the rear shell to improve the sealing effect when the two adjacent protective shells are connected.

[0018] Preferably, the front shell is provided with two liquid inlet pipes and two liquid outlet pipes corresponding to the liquid inlet and the liquid outlet, the two liquid inlet pipes are connected to a vertically arranged liquid distributor pipe, the side of the liquid distributor pipe facing away from the two liquid inlet pipes is connected to the liquid inlet main pipe, and the two liquid outlet pipes are connected to the liquid outlet main pipe.

[0019] The distances between the two liquid inlet pipes and the main liquid inlet pipe are the same. This design can effectively realize that one liquid inlet pipe supplies liquid to the two liquid inlet pipes and can realize uniform distribution of the coolant.

[0020] Preferably, a plug is provided at the bottom end of the liquid dispensing tube and a flow control valve is provided at the top end, and the flow control valve is a one-way valve that controls the coolant so that it can only flow in but not out.

[0021] A battery pack comprises the above-mentioned battery pack thermal management device.

[0022] Preferably, the battery pack further comprises a battery box, the liquid cooling plate, the battery and the outer shell are all installed in the battery box, the liquid inlet pipe and the liquid outlet pipe are both arranged through the battery box, and the battery box is used to protect the battery.

[0023] Technical effects and advantages of the utility model:

[0024] The battery pack thermal management device and the battery pack are designed with two sets of cooling channels, which can make the coolant circulate more quickly and evenly in the channel chamber, thereby improving the cooling efficiency of the battery assembly and reducing the situation of insufficient heat dissipation. The temperature distribution of the coolant in the cooling channel is more uniform, avoiding the problem of uneven temperature distribution in the cooling channel, thereby ensuring the stability of the temperature inside the battery pack.

[0025] By connecting two liquid inlet pipes to the main liquid inlet pipe at equal distances, the temperature difference between the coolant at the liquid inlet and the liquid outlet can be reduced, so that the coolant can be evenly supplied to all parts of the battery assembly, reducing the problem of local overheating or insufficient cooling. Through a simple layout design, the complexity of the system is reduced, and the manufacturing and maintenance costs are reduced.

[0026] By connecting the two liquid inlet pipes to the main liquid inlet pipe at equal distances, the coolant can be evenly distributed in the main liquid inlet pipe to the two liquid inlet pipes, ensuring that the coolant is evenly supplied to all parts of the battery pack. The uniform coolant layout maintains the temperature stability of the entire system during operation, thereby improving the safety and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 This is an exploded view of the protective housing, battery and liquid cooling plate of the utility model;

[0029] Figure 3 It is an exploded view of two adjacent protective shells of the utility model;

[0030] Figure 4 This is an exploded view of the liquid cooling plate of the utility model;

[0031] Figure 5 This is a structural schematic diagram of the sealing plate of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the protective shell of the utility model from the first perspective;

[0033] Figure 7 This is a schematic structural diagram of the protective shell of the utility model from a second viewing angle.

[0034] In the figure: 1. Liquid cooling plate; 101. Flow channel plate; 102. Closing plate; 103. Raised rib; 104. Cooling flow channel; 105. Protrusion; 106. Liquid inlet; 107. Liquid outlet; 108. Diversion port; 2. Battery; 3. Shell; 301. Front shell; 302. Rear shell; 303. Protective shell; 304. Plug slot; 305. Positioning slot; 306. Concave slot; 307. Bump; 308. Liquid delivery port; 309. Placement slot; 310. Concave waist-shaped slot; 311. Mounting hole; 312. Waist-shaped pad; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Liquid distribution pipe; 7. Liquid inlet main pipe; 8. Liquid outlet main pipe; 9. Plug; 10. Flow control valve. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The following is combined with Figure 1-7 To further explain this application in detail,

[0037] An embodiment of the present application discloses a battery pack thermal management device, including a liquid cooling plate 1 and a shell 3, wherein the liquid cooling plate 1 is arranged between two adjacent batteries 2, and the shell 3 covers the outer side surfaces of the liquid cooling plate 1 and the battery 2 and is used to protect the liquid cooling plate 1 and the battery 2.

[0038] The liquid cooling plate 1 comprises a flow channel plate 101 and a sealing plate 102 connected to the flow channel plate 101. The sealing plate 102 is connected to the flow channel plate 101 to form a flow channel chamber. The flow channel plate 101 is provided with two groups of cooling channels 104 which are symmetrically arranged up and down and surrounded by ribs 103. The upper and lower ends of the liquid cooling plate 1 are provided with protrusions 105 extending outwards. The protrusions 105 on both sides are respectively provided with a liquid inlet 106 and a liquid outlet 107.

[0039] Two groups of cooling channels 104 are arranged in the channel chamber of the liquid cooling plate 1, and each group of cooling channels 104 is respectively provided with a liquid inlet 106 and a liquid outlet 107. The two groups of cooling channels 104 are arranged on the channel plate 101. Compared with the independent cooling channels 104 of the traditional technology, the channel flow is shortened, and the coolant entering through the two liquid inlets 106 can quickly pass through the cooling channels 104, so that the circulation becomes faster, and the temperature difference of the coolant at the liquid inlet 106 and the liquid outlet 107 becomes smaller, so that the temperature distribution of the coolant in the cooling channel 104 is not much different, and there will be no uneven temperature distribution in the cooling channel 104 and the temperature in some areas will be high, which can improve the heat dissipation effect of the overall battery 2.

[0040] The housing 3 includes a front housing 301 and a rear housing 302 located at two ends, and a plurality of protective housings 303 located between the front housing 301 and the rear housing 302 and covering the outer sides of the liquid cooling plate 1 and the battery 2;

[0041] The protective shell 303 is provided with a plug-in slot 304 for inserting the liquid cooling plate 1, and positioning slots 305 for positioning and inserting the battery 2 are provided on both sides of the plug-in slot 304. The liquid cooling plate 1 is inserted into the plug-in slot 304 located at the center of the inner side of the outer shell 3, and the battery 2 is inserted into the installation chamber surrounded by the positioning slots 305 connected to each other on two adjacent protective shells 303.

[0042] The arrangement of the plug-in slot 304 and the positioning slot 305 on the protective shell 303 facilitates the installation and positioning of the liquid cooling plate 1 and the battery 2 .

[0043] Specifically, the liquid inlet 106 and the liquid outlet 107 on the sealing plate 102 are both provided with guide ports 108 leading to the flow channel chamber, so that the incoming coolant can flow into the cooling flow channel 104 through the guide ports 108 .

[0044] Specifically, one side of the protective shell 303 is provided with a concave groove 306 for the protrusion 105 to cooperate with and insert into the positioning, and the side of the protective shell 303 facing away from the concave groove 306 is provided with a protrusion 307 of the same size as the concave groove 306, and the concave groove 306 is provided with a liquid delivery port 308 that penetrates the protective shell 303 and the protrusion 307. The liquid delivery port 308 is docked with the liquid inlet 106 or the liquid outlet 107, and the size of the liquid delivery port 308 is consistent with the size of the liquid inlet 106 and the liquid outlet 107, so as to facilitate the docking connection.

[0045] When two adjacent protective shells 303 are docked, the protrusion 307 on one protective shell 303 can be inserted into the concave groove 306. The design of the concave groove 306 and the protrusion 307 on the protective shell 303 allows adjacent protective shells 303 to be easily docked without the need for additional connectors, greatly simplifying the installation process and facilitating subsequent maintenance. The liquid delivery port 308 can be docked with the liquid inlet 106 or the liquid outlet 107, making it convenient for the liquid inlet 106 to dock with the liquid delivery port 308 to form a liquid delivery channel, and for the liquid outlet 107 to dock with the liquid delivery port 308 to form a liquid outlet channel. No additional pipeline connection is required, thereby improving the working efficiency of the entire thermal management system, allowing the coolant to flow more effectively in the battery pack 2, thereby improving the heat dissipation efficiency.

[0046] Specifically, a placement groove 309 for placing a sealing gasket is provided on the protrusion 307 and located at the outer periphery of the liquid delivery port 308 . The sealing gasket is placed in the placement groove 309 to improve the sealing effect when two adjacent protective shells 303 are butt-jointed.

[0047] Specifically, concave waist-shaped grooves 310 are provided on both sides of the protective shell 303, and mounting holes 311 are provided in the concave waist-shaped grooves 310. The front shell 301, the rear shell 302 and the protective shell 303 are locked and fixed together by bolts passing through the mounting holes 311, which can ensure the stability of the structure of the battery 2 assembly and prevent loosening or deformation during use, facilitate the assembly of the liquid cooling plate 1, the outer shell 3, and the battery 2, and reduce the time and complexity of the assembly process. Through the structure of the bolts, the various components inside the battery 2 assembly can be easily disassembled and replaced, which is convenient for maintenance and repair.

[0048] Specifically, a waist-shaped pad 312 inserted into the concave waist-shaped groove 310 is provided between two adjacent protective shells 303 and between the protective shell 303 and the front shell 301 or the rear shell 302 to improve the sealing effect when the two adjacent protective shells 303 are connected.

[0049] Specifically, the front shell 301 is provided with two liquid inlet pipes 4 and two liquid outlet pipes 5 corresponding to the liquid inlet port 106 and the liquid outlet port 107. The two liquid inlet pipes 4 are connected to a vertically arranged liquid distributor 6. The side of the liquid distributor 6 facing away from the two liquid inlet pipes 4 is connected to a liquid inlet main pipe 7. The two liquid outlet pipes 5 are connected to a liquid outlet main pipe 8.

[0050] The distances between the two liquid inlet pipes 4 and the main liquid inlet pipe 7 are the same. This design can effectively realize that one main liquid inlet pipe 7 supplies liquid to the two liquid inlet pipes 4 and can realize uniform distribution of the coolant.

[0051] By connecting the two liquid inlet pipes 4 to the liquid inlet main pipe 7 at equal distances, the coolant can be evenly distributed in the liquid inlet main pipe 7 to the two liquid inlet pipes 4, ensuring that the coolant is evenly supplied to each part of the battery group 2, ensuring a balanced cooling effect, and the uniform coolant arrangement helps to improve the uniformity of the coolant supply, thereby improving the cooling efficiency of the entire battery 2 assembly, avoiding the problem of local overheating or insufficient cooling, and achieving a uniform supply of coolant through a simple arrangement design, avoiding complex design and manufacturing of coolant circulation, reducing the complexity of the system, and reducing manufacturing and maintenance costs. The uniform coolant arrangement is conducive to maintaining the temperature stability of the entire system during operation, and improving the safety and reliability of the system.

[0052] The bottom end of the liquid dispensing tube 6 is provided with a plug 9 and the top end is provided with a flow control valve 10, and the flow control valve 10 is a one-way valve, which controls the coolant to only enter but not exit.

[0053] A battery pack comprises the above-mentioned battery pack thermal management device.

[0054] The battery pack also includes a battery box, the liquid cooling plate 1, battery 2 and shell 3 are all installed in the battery box, the liquid inlet pipe 4 and liquid outlet pipe 5 are both arranged through the battery box, the liquid cooling plate 1, battery 2 and shell 3 are installed in the battery box, and are protected by the battery box.

[0055] Compared with the independent cooling channel 104 design, the battery pack thermal management device and battery pack, the two groups of cooling channels 104 can better meet the heat dissipation requirements of the battery 2 in a high temperature environment, ensure the normal operation of the battery 2 pack, and increase the flow rate of the coolant inside the liquid cooling plate 1, thereby increasing the heat transfer rate. This helps to shorten the cooling time of the battery 2 pack, improve the charging and discharging efficiency of the battery 2 pack, and extend the life of the battery 2. The design of the two groups of cooling channels 104 can reduce the temperature difference inside the battery 2 pack and make the temperature of each part of the battery 2 pack more uniform. In this way, the cells inside the battery 2 pack can work together better, reduce the risk of thermal runaway, improve the stability of the entire battery 2 system, and improve the cooling efficiency of the battery 2 pack.

[0056] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack thermal management device, characterized in that: include: A liquid cooling plate (1), the liquid cooling plate (1) being arranged between two adjacent batteries (2), the liquid cooling plate (1) comprising a flow channel plate (101) and a sealing plate (102) connected to the flow channel plate (101), the sealing plate (102) and the flow channel plate (101) being connected to form a flow channel chamber, the flow channel plate (101) being provided with two groups of cooling channels (104) symmetrically arranged up and down and surrounded by convex ribs (103), the liquid cooling plate (1) being provided with protrusions (105) extending outward at both upper and lower ends, and the protrusions (105) on both sides being provided with liquid inlets (106) and liquid outlets (107) respectively; A housing (3), the housing (3) comprising a front housing (301) and a rear housing (302) located at two ends, and a plurality of protective housings (303) located between the front housing (301) and the rear housing (302) and covering the outer sides of the liquid cooling plate (1) and the battery (2); The protective shell (303) is provided with a plug-in slot (304) for inserting the liquid cooling plate (1), and positioning slots (305) for positioning and plugging the battery (2) are provided on both sides of the plug-in slot (304).

2. A battery pack thermal management device according to claim 1, characterized in that: The liquid inlet (106) and the liquid outlet (107) on the sealing plate (102) are both provided with flow guide ports (108) leading to the flow channel chamber.

3. A battery pack thermal management device according to claim 1, characterized in that: One side of the protective shell (303) is provided with a concave groove (306) for the protrusion (105) to be inserted and positioned; one side of the protective shell (303) facing away from the concave groove (306) is provided with a convex block (307) of the same size as the concave groove (306); the concave groove (306) is provided with a liquid delivery port (308) penetrating the protective shell (303) and the convex block (307); the liquid delivery port (308) is connected to the liquid inlet (106) or the liquid outlet (107), and the size of the liquid delivery port (308) is consistent with the size of the liquid inlet (106) or the liquid outlet (107).

4. A battery pack thermal management device according to claim 3, characterized in that: A placement groove (309) for placing a sealing gasket is provided on the protrusion (307) and located on the outer periphery of the liquid delivery port (308).

5. A battery pack thermal management device according to claim 1, characterized in that: Both sides of the protective shell (303) are provided with concave waist-shaped grooves (310), and mounting holes (311) are provided in the concave waist-shaped grooves (310). Bolts passing through the mounting holes (311) are used to lock and fix the front shell (301), the rear shell (302) and the protective shell (303) together.

6. A battery pack thermal management device according to claim 5, characterized in that: A waist-shaped cushion block (312) inserted into the concave waist-shaped groove (310) is provided between two adjacent protective shells (303) and between the protective shell (303) and the front shell (301) or the rear shell (302).

7. A battery pack thermal management device according to claim 1, characterized in that: The front shell (301) is provided with two liquid inlet pipes (4) and two liquid outlet pipes (5) corresponding to the liquid inlet port (106) and the liquid outlet port (107); the two liquid inlet pipes (4) are connected to a vertically arranged liquid distributor pipe (6); the side of the liquid distributor pipe (6) facing away from the two liquid inlet pipes (4) is connected to a liquid inlet main pipe (7); and the two liquid outlet pipes (5) are connected to a liquid outlet main pipe (8).

8. A battery pack thermal management device according to claim 7, characterized in that: The bottom end of the liquid dispensing tube (6) is provided with a plug (9) and the top end is provided with a flow control valve (10).

9. A battery pack, characterized in that: The battery pack includes a battery pack thermal management device as described in any one of claims 1-8.

10. A battery pack according to claim 9, characterized in that: The battery pack also includes a battery box, the liquid cooling plate (1), the battery (2) and the outer shell (3) are all installed in the battery box, and the liquid inlet pipe (4) and the liquid outlet pipe (5) are both arranged through the battery box.

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