Battery pack liquid cooling flow control valve

Abstract

The utility model discloses a liquid cooling flow control valve for a battery pack, which is provided with a water inlet joint capable of being connected with a vehicle body; the first end of the water pipe connector is connected with the second end of the water inlet connector; the first end of the corrugated pipe is connected with the second end of the water pipe connector; the first end of the electronic throttle valve is connected with the second end of the corrugated pipe; the first end of the water outlet pipe is connected with the second end of the electronic throttle valve, and the second end of the water outlet pipe is connected with the battery pack liquid cooling plate, so that the problem that the flow in the battery pack liquid cooling loop cannot be controlled is solved; the opening and closing angle of the electronic valve is controlled to control the flow of the cooling liquid, so that the battery cooling rate forms closed-loop control according to the real-time temperature of the battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of power battery packs, and particularly relates to a liquid cooling flow control valve for a battery pack. Background Art

[0002] In the process of implementing the present utility model, the inventor found that the prior art has at least the following problems:

[0003] New energy vehicles have the advantages of low noise, high driving stability, and zero emissions.

[0004] In the new energy PACK industry, the volume of the battery pack is miniaturized, and the utilization rate of the battery space is getting higher and higher. Therefore, the battery pack with a liquid cooling scheme has become the mainstream development direction of the industry. In the new energy industry, the mainstream liquid cooling scheme directly transfers the coolant cooled by the external compressor of the whole vehicle to the liquid cooling plate on the inner bottom plate of the battery pack after refrigeration. The flow rate of the coolant in the liquid cooling plate of the battery pack cannot be controlled, resulting in an uncontrollable cooling rate and affecting the temperature difference inside the battery pack.

[0005] CN112151912A - Battery pack with controllable coolant flow direction, battery pack thermal management system and control method disclose a battery pack with controllable coolant flow direction, battery pack thermal management system and control method, including a battery pack housing and a liquid cooling plate arranged in the battery pack housing. A battery pack water inlet and a battery pack water outlet are arranged on the battery pack housing. The liquid cooling plate includes a first liquid cooling plate pipe interface and a second liquid cooling plate pipe interface located on its left and right sides. A coolant flow channel is arranged between the first liquid cooling plate pipe interface and the second liquid cooling plate pipe interface, and it also cannot solve the above technical problems. Summary of the Utility Model

[0006] The technical problem to be solved by the present utility model is to provide a liquid cooling flow control valve for a battery pack. The BMS in the battery pack controls the opening and closing angle of the electronic valve according to the real-time temperature of the battery to control the coolant flow rate, so as to realize the closed-loop control of the battery cooling rate according to the real-time temperature of the battery.

[0007] In order to solve the above technical problems, the technical solution adopted by the present utility model is: a liquid cooling flow control valve for a battery pack, having:

[0008] An inlet joint, which can be connected to the vehicle body;

[0009] A water pipe joint, the first end of which is connected to the second end of the inlet joint;

[0010] A corrugated pipe, the first end of which is connected to the second end of the water pipe joint;

[0011] An electronic throttle valve, the first end of which is connected to the second end of the corrugated pipe;

[0012] The outlet pipe has its first end connected to the second end of the electronic throttle valve, and the second end of the outlet pipe is connected to the battery pack liquid cooling plate.

[0013] The water pipe joint is a T-shaped joint; a first sealing protrusion adapted to the corrugated pipe is provided on the second end of the water pipe joint.

[0014] A connecting plate is provided on the water inlet joint, and a connecting hole is provided on the connecting plate. The connecting plate is connected to the vehicle body through bolts and the connecting hole.

[0015] The corrugated pipe includes a corrugated portion in the middle and straight pipe portions at both ends. The straight pipe portions at both ends are respectively connected to the water pipe joint and the electronic throttle valve.

[0016] A first clamping block is provided on the water pipe joint, and a water inlet pipe clamping ring adapted to the first clamping block is provided on the water inlet pipe of the water inlet joint.

[0017] A second clamping block is provided on the electronic throttle valve, and an outlet pipe clamping ring adapted to the second clamping block is provided on the outlet pipe.

[0018] One of the above technical solutions has the following advantages or beneficial effects. It solves the problem that the flow rate in the battery pack liquid cooling loop cannot be controlled. By adding a flow control valve (PMW valve) in the liquid cooling loop pipeline, the BMS (Battery Management System) in the battery pack controls the opening and closing angle of the electronic valve according to the real-time temperature of the battery to control the coolant flow rate, so as to realize the closed-loop control of the battery cooling rate according to the real-time temperature of the battery. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the battery pack liquid cooling flow control valve provided in the embodiment of the present invention;

[0020] Figure 2 For Figure 1 the schematic structural diagram of the battery pack liquid cooling flow control valve;

[0021] Figure 3 For Figure 1 the schematic structural diagram of the battery pack liquid cooling flow control valve;

[0022] Figure 4 For Figure 1 the schematic structural diagram of the battery pack liquid cooling flow control valve;

[0023] Figure 5 For Figure 1 the schematic structural diagram of the battery pack liquid cooling flow control valve;

[0024] The markings in the above figures are as follows: 1. Inlet joint, 11. Inlet pipe, 12. Connecting plate, 121. Connecting hole, 13. Inlet pipe retaining ring, 2. Pipe joint, 21. First sealing protrusion, 22. First clamping block, 3. Bellows, 31. Corrugated part, 32. Straight pipe part, 4. Electronic throttle valve, 41. Second sealing protrusion, 42. Second clamping block, 5. Outlet pipe, 51. Outlet pipe retaining ring. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] See Figures 1 to 5 , a battery pack liquid cooling flow control valve, having:

[0027] An inlet joint 1, which can be connected to the vehicle body; serving the purpose of connecting to the vehicle body cooling system. A pipe joint 2, whose first end is connected to the second end of the inlet joint 1; the pipe joint 2 is a T-shaped joint, serving the purpose of turning; a first sealing protrusion 21 adapted to the bellows 3 is provided on the second end of the pipe joint 2, serving the role of sealed connection. A bellows 3, whose first end is connected to the second end of the pipe joint 2; the bellows 3 can facilitate the layout of the pipeline and can change the direction arbitrarily. An electronic throttle valve 4, whose first end is connected to the second end of the bellows 3; by adding a flow control valve (PMW type valve) to the liquid cooling circuit pipeline, the BMS (battery management system) in the battery pack controls the opening and closing angle of the electronic valve according to the real-time temperature of the battery to control the coolant flow rate, so as to realize the closed-loop control of the battery cooling rate according to the real-time temperature of the battery. An outlet pipe, whose first end is connected to the second end of the electronic throttle valve 4, and the second end of the outlet pipe is connected to the battery pack liquid cooling plate. Serving the purpose of providing a cooling medium for the liquid cooling plate.

[0028] A connecting plate 12 is provided on the inlet joint 1, and a connecting hole 121 is provided on the connecting plate 12. The connecting plate 12 is connected to the vehicle body through bolts and the connecting hole 121. Facilitating the connection between the inlet joint 1 and the vehicle body, the connection is more stable and reliable.

[0029] The bellows 3 includes a corrugated part 31 in the middle and straight pipe parts 32 at both ends. The straight pipe parts 32 at both ends are respectively connected to the pipe joint 2 and the electronic throttle valve 4. The straight pipe parts 32 at both ends serve the role of connection, and the corrugated part 31 in the middle can change the direction arbitrarily, facilitating the layout of the pipeline.

[0030] The water pipe joint 2 is provided with a first clamping block 22, and the water inlet pipe of the water inlet joint 1 is provided with a water inlet pipe clamping ring 13 adapted to the first clamping block 22. The first clamping block 22 is movably arranged to facilitate the detachable connection between the water pipe joint 2 and the water inlet pipe.

[0031] The electronic throttle valve 4 is provided with a second clamping block 42, and the water outlet pipe is provided with a water outlet pipe clamping ring 51 adapted to the second clamping block 42. The second clamping block 42 is movably arranged to facilitate the detachable connection between the electronic throttle valve 4 and the water outlet pipe.

[0032] The liquid cooling plate circuit is composed of 4 components: a liquid cooling inlet and outlet joint, a corrugated pipe 3, a T-shaped water pipe joint 2, and an electronic throttle valve 4 (PMW type valve). The opening and closing angle of the electronic throttle valve 4 is adjusted in real time by the BMS (battery management system) according to the real-time temperature of the battery through a temperature / flow calculation model, so as to achieve the purpose of controlling the flow rate.

[0033] It can accurately control the coolant flow rate; accurately control the battery temperature and minimize the internal temperature difference of the experimental battery.

[0034] After adopting the above structure, the problem that the flow rate in the liquid cooling circuit of the battery pack cannot be controlled is solved. By adding a flow control valve (PMW type valve) in the liquid cooling circuit pipeline, the BMS (battery management system) in the battery pack controls the opening and closing angle of the electronic valve according to the real-time temperature of the battery to control the coolant flow rate, so as to realize the closed-loop control of the battery cooling rate according to the real-time temperature of the battery.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, 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 therefore should not be construed as a limitation of the present invention.

[0036] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A battery pack liquid cooling flow control valve, characterized in that: have: A water inlet connector, which can be connected to the vehicle body; A water pipe joint, a first end of which is connected to the second end of the water inlet joint; a bellows, a first end of which is connected to the second end of the water pipe connector; an electronic throttle valve, a first end of which is connected to the second end of the bellows; A water outlet pipe, a first end of which is connected to the second end of the electronic throttle valve, and a second end of which is connected to the battery pack liquid cooling plate.

2. The battery pack liquid cooling flow control valve according to claim 1, characterized in that: The water pipe joint is a T-shaped joint; a first sealing protrusion adapted to the corrugated pipe is provided on the second end of the water pipe joint.

3. The battery pack liquid cooling flow control valve according to claim 2, characterized in that: The water inlet joint is provided with a connecting plate, the connecting plate is provided with connecting holes, and the connecting plate is connected to the vehicle body through bolts and the connecting holes.

4. The battery pack liquid cooling flow control valve according to claim 3, characterized in that: The bellows comprises a corrugated portion located in the middle and straight pipe portions located at two ends, and the straight pipe portions at the two ends are respectively connected to a water pipe joint and an electronic throttle valve.

5. The battery pack liquid cooling flow control valve according to claim 4, characterized in that: The water pipe joint is provided with a first clamping block, and the water inlet pipe of the water inlet joint is provided with a water inlet pipe clamping ring matched with the first clamping block.

6. The battery pack liquid cooling flow control valve according to claim 5, characterized in that: The electronic throttle valve is provided with a second clamping block, and the water outlet pipe is provided with a water outlet pipe clamping ring adapted to the second clamping block.

Images