Automatic pressure relief liquid-cooled battery pack

Abstract

The utility model discloses an automatic pressure relief liquid-cooled battery pack, which relates to the technical field of batteries, and mainly comprises a battery pack main body, the bottom of the main body is a bottom plate, the top is provided with a battery management component, an electrical connection point, a safety control component and the like, the left side of the top is provided with an anti-explosion valve, and the upper part is provided with an upper cover, a detection port and a disassembly port; the two sides of the top of the bottom plate are provided with a liquid inlet and outlet and a pressure release valve, a liquid cooling plate and a cooling cavity are arranged in the bottom plate, the cooling cavity is communicated with the liquid inlet and outlet, and the top of the cooling cavity is provided with a sealing strip. A bottom connector of the pressure release valve corresponds to the liquid inlet and outlet and is fixedly connected with the liquid inlet and outlet through a fixing buckle. The battery modules are arranged on the inner side of the bottom plate, the insulating plate is arranged in the middle of the bottom plate, the liquid cooling plate is made of a steel material, the insulating coatings are arranged on the outer sides of the bottom plate and the upper cover, the battery pack has the advantages of good liquid cooling heat dissipation effect, strong automatic pressure relief function, stable structure, good insulating performance and the like, and the battery performance and the safety can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy battery related technical field, concretely relates to an automatic pressure relief liquid cooling battery pack. BACKGROUND

[0002] Battery pack as the power source of new energy automobile, battery pack can store up electric energy, and according to the need in the vehicle driving process, electric energy is released to drive motor, drives the vehicle to travel, battery pack can adjust the size of output current and voltage, thereby control the speed and torque of drive motor, realize the acceleration, deceleration, climbing and other travel functions of vehicle, with the research and development of new material and the continuous progress of battery manufacturing process, the energy density of new energy battery pack is continuously improved, which means that battery pack can store more electric energy under the same volume or weight.

[0003] But the existing battery pack has problems such as poor heat dissipation, safety performance needs to be improved and the like in the use process, the heat dissipation mode of traditional battery pack can not effectively reduce the battery temperature, leading to the decline of battery performance and even the emergence of safety hazard, when the internal pressure of battery pack is too high, lack of effective automatic pressure relief measures, which can cause danger. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an automatic pressure relief liquid cooling battery pack to solve the problems of the existing battery pack in the use process, such as poor heat dissipation, safety performance needs to be improved and the like, the heat dissipation mode of traditional battery pack can not effectively reduce the battery temperature, leading to the decline of battery performance and even the emergence of safety hazard, when the internal pressure of battery pack is too high, lack of effective automatic pressure relief measures, which can cause danger.

[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme: an automatic pressure relief liquid cooling battery pack, comprising a battery pack main body;

[0006] The bottom plate is arranged at the bottom position of the battery pack main body, the battery management assembly is arranged at the top position of the battery pack main body, the electrical connection point is arranged at the right position of the battery management assembly, the safety control assembly is arranged at the left position of the battery management assembly, the positive connector and the negative connector are arranged at the left and right sides of the bottom of the safety control assembly, the explosion-proof valve is arranged at the right position of the top of the battery pack main body, the upper cover is arranged at the top position of the battery pack main body, the detection port is arranged at the upper position of the upper cover, and the dismounting port is arranged at the left side of the detection port;

[0007] The inlet and outlet ports are arranged at the left and right sides of the top of the bottom plate respectively, the joints are arranged at the top position of the inlet and outlet ports, and the pressure relief valve is arranged at the left top position of the battery pack main body.

[0008] Preferably, the bottom plate is provided with a liquid cooling plate at an internal position, and the liquid cooling plate is provided with a cooling cavity at an internal position.

[0009] Preferably, the cooling cavity is connected with the liquid inlet and outlet in a through manner, and the cooling cavity is provided with a sealing strip at a top position.

[0010] Preferably, the connector is provided with a connecting port at a bottom position, and the connecting port corresponds to the liquid inlet and outlet.

[0011] Preferably, the connector is provided with a fixing buckle at a side position, and the connecting port and the liquid inlet and outlet are fixedly connected through the fixing buckle.

[0012] Preferably, the bottom plate is provided with a top frame at a top position, the bottom plate is connected with the upper cover through the top frame, and the bottom plate is provided with an exhaust port at a side position.

[0013] Preferably, the bottom plate is provided with a battery module at an internal position, and the bottom plate is provided with an insulating plate at a middle position of the battery module.

[0014] Preferably, the liquid cooling plate is made of steel material, and the bottom plate and the upper cover are provided with an insulating plating layer at an external position.

[0015] Compared with the prior art, the automatic pressure relief liquid cooling battery pack has the following beneficial effects:

[0016] The arrangement of the liquid inlet and outlet, the pressure relief valve, the liquid cooling plate, the cooling cavity, the sealing strip, the connecting port, the fixing buckle, the top frame and the exhaust port facilitates the circulation of the cooling liquid, provides efficient liquid cooling heat dissipation for the battery pack, effectively reduces the battery temperature, prolongs the service life of the battery, improves the performance of the battery, the pressure relief valve is automatically opened when the internal pressure of the battery pack is too high, and the pressure relief is performed through the liquid inlet and outlet, thereby guaranteeing the safe operation of the battery pack, reducing the safety risk, the cooling cavity in the liquid cooling plate can fully contact the battery, uniform heat dissipation is achieved, local overheating is avoided, and the heat dissipation efficiency is improved, the cooling cavity is communicated with the liquid inlet and outlet, the smooth flow of the cooling liquid is guaranteed, and stable heat dissipation effect is maintained, the sealing strip can effectively prevent the leakage of the cooling liquid, the sealing property of the cooling system is ensured, the stability of the cooling effect is improved, the fixing buckle firmly connects the connecting port and the liquid inlet and outlet, prevents loosening or leakage in the use process, guarantees the normal work of the pressure relief valve, the bottom plate is connected with the upper cover through the top frame, the connection mode is simple and reliable, installation and dismounting are facilitated, the overall structural stability of the battery pack is guaranteed, the exhaust port can timely exhaust the gas generated in the battery pack, prevents the accumulation of the gas and causes the internal pressure to be too high, and the safety of the battery pack is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structural schematic view of the utility model.

[0018] Fig. 2 It is the structural schematic view of the battery pack main body top part in the utility model.

[0019] Fig. 3 It is the structural schematic view of the upper cover in the utility model.

[0020] Fig. 4 It is the structural schematic view of the bottom plate in the utility model.

[0021] Fig. 5 It is the structural schematic view of the liquid cooling plate in the utility model.

[0022] Fig. 6 It is the structural schematic view of the fixed buckle in the utility model.

[0023] In the drawing: 1, battery pack main body;2, bottom plate;3, electrical connection point;4, battery management assembly;5, safety control assembly;6, explosion-proof valve;7, positive connector;8, negative connector;9, inlet and outlet;10, upper cover;11, detection port;12, dismounting port;13, top frame;14, exhaust port;15, liquid cooling plate;16, cooling cavity;17, sealing strip;18, joint;19, fixed buckle;20, connecting port;21, pressure relief valve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] The utility model provides a kind of automatic pressure relief liquid cooling battery pack as shown in Figs. 1-6 Including battery pack main body 1;

[0026] Battery pack main body 1 bottom position is provided with bottom plate 2, battery pack main body 1 top position is provided with battery management assembly 4, battery management assembly 4 right side position is provided with electrical connection point 3, battery management assembly 4 left side position is provided with safety control assembly 5, safety control assembly 5 bottom left and right sides are provided with positive connector 7 and negative connector 8, battery pack main body 1 top right side position is provided with explosion-proof valve 6, battery pack main body 1 top position is provided with upper cover 10, upper cover 10 upper position is provided with detection port 11, detection port 11 left side is provided with dismounting port 12;

[0027] The bottom plate 2 is provided with inlet and outlet ports 9 at the left and right sides of the top part, and a joint 18 is arranged at the top part of the inlet and outlet ports 9. A pressure relief valve 21 is arranged at the top left side of the battery pack body 1.

[0028] The bottom plate 2 is provided with a liquid cooling plate 15 at the inner position, and a cooling cavity 16 is arranged at the inner position of the liquid cooling plate 15.

[0029] The cooling cavity 16 is connected to the inlet and outlet ports 9, and a sealing strip 17 is arranged at the top part of the cooling cavity 16.

[0030] The joint 18 is provided with a connecting port 20 at the bottom part, and the connecting port 20 corresponds to the inlet and outlet ports 9.

[0031] The joint 18 is provided with a fixed buckle 19 at the side position, and the connecting port 20 is fixedly connected to the inlet and outlet ports 9 through the fixed buckle 19.

[0032] The bottom plate 2 is provided with a top frame 13 at the top part, and the bottom plate 2 is clamped and connected to the upper cover 10 through the top frame 13. An exhaust port 14 is arranged at the side position of the bottom plate 2.

[0033] The bottom plate 2 is provided with a battery module at the inner position, and an insulating plate is arranged at the middle position of the bottom plate 2 and the battery module.

[0034] The liquid cooling plate 15 is made of steel material, and the outer position of the bottom plate 2 and the upper cover 10 is provided with an insulating coating.

[0035] In this embodiment, the specific implementation steps of an automatic pressure relief liquid-cooled battery pack. First, the appearance of the battery pack body 1 is inspected to check whether there are obvious scratches, bumps or other damage on the surface of the battery pack, including the upper cover 10, the bottom plate 2 and the connecting parts of each component, etc. Check whether the key components such as battery management assembly 4, safety control assembly 5, electrical connection point 3, positive connector 7 and negative connector 8 are normal, ensure that each component is not loose, deformed or damaged, check whether the explosion-proof valve 6, the inlet and outlet liquid port 9, the detection port 11 and the dismounting port 12 are unobstructed, there is no blockage, and the sealing of each component is good. Place the battery pack in the predetermined installation position, ensure that the bottom plate 2 is placed stably, make the bottom fully contact with the installation plane, pay attention not to block the exhaust port 14 on the side of the bottom plate 2, to ensure that the gas can be normally discharged in the subsequent use process, according to the correct electrical connection specification, connect the external equipment with the electrical connection point 3 of the battery pack and the positive and negative connectors 7 and 8. During the connection process, ensure that the connection is firm to avoid loose connection, check the sealing condition of the inlet and outlet liquid port 9 and the cooling cavity 16 connected thereto, confirm whether the sealing strip 17 is intact, if damaged, replace it in time to prevent cooling liquid leakage, inject an appropriate amount of cooling liquid into the cooling cavity 16 through the inlet and outlet liquid port 9, and observe the liquid level in the cooling cavity 16 during the injection process to avoid too much or too little cooling liquid. After the injection is completed, check the sealing condition of the inlet and outlet liquid port 9 again, check the integrity of the pressure relief valve 21, check whether its connecting port 20, fixing buckle 19 and other components are normal, and whether there is damage or deformation, correspond the connecting port 20 of the connector 18 with the inlet and outlet liquid port 9, and fix and connect them through the fixing buckle 19. After the connection is completed, check the firmness of the connection to ensure that the connector 18 can work normally when needed. During the operation of the battery pack, the parameters in the battery pack can be detected periodically through the detection port 11, such as temperature, voltage, etc., so as to timely master the running state of the battery pack and handle the abnormal situation in time. At the same time, attention should be paid to whether the pressure relief valve 21 is abnormally opened or closed. If abnormalities are found, the operation of the battery pack should be stopped immediately, and whether there is a problem with the pressure relief valve 21 and the related components of the entire battery pack should be checked. When the battery pack needs to be maintained or repaired, first disconnect all electrical connections, then open the dismounting port 12, carefully dismount the upper cover 10 and other components according to the specified procedure, and operate inside the battery pack. During the maintenance or repair process, the liquid cooling system should be checked, including the cleaning condition of the cooling cavity 16, the liquid level and quality of the cooling liquid, etc. If necessary, corresponding adjustment or replacement can be made. The pressure relief valve 21 should also be checked to ensure its normal function, such as whether the fixing buckle 19 is firm, whether the connecting port 20 is unobstructed, etc. After maintenance or repair is completed, reinstall each component according to the reverse procedure to ensure good sealing and firm connection. When the battery pack reaches the service life or appears serious failure that cannot be repaired, first disconnect all electrical connections, then carefully remove the battery pack from the installation position,The removed battery pack is properly disposed of according to relevant regulations, such as recycling and other disposal methods, to meet environmental protection requirements.

[0036] As shown in Figs. 1-2 and Figs. 5-6 , the top and left and right sides of the bottom plate 2 are provided with inlet and outlet ports 9, the top of the inlet and outlet ports 9 is provided with a connector 18, the left top of the battery pack body 1 is provided with a pressure relief valve 21, the inside of the bottom plate 2 is provided with a liquid cooling plate 15, the inside of the liquid cooling plate 15 is provided with a cooling cavity 16, the cooling cavity 16 is connected with the inlet and outlet ports 9, the top of the cooling cavity 16 is provided with a sealing strip 17, the bottom of the connector 18 is provided with a connecting port 20, the connecting port 20 corresponds to the inlet and outlet ports 9, the side of the connector 18 is provided with a fixed buckle 19, the connecting port 20 and the inlet and outlet ports 9 are fixedly connected through the fixed buckle 19, the top of the bottom plate 2 is provided with a top frame 13, the bottom plate 2 is connected with the upper cover 10 through the top frame 13, and the side of the bottom plate 2 is provided with an exhaust port 14.

[0037] Preferably, the inlet and outlet ports 9 facilitate the circulation of the cooling liquid, provide efficient liquid cooling heat dissipation for the battery pack, effectively reduce the battery temperature, prolong the service life of the battery, improve the performance of the battery, the pressure relief valve 21 is automatically opened when the internal pressure of the battery pack is too high, and the pressure is released through the inlet and outlet ports 9 to ensure the safe operation of the battery pack and reduce the safety risk, the cooling cavity 16 in the liquid cooling plate 15 can fully contact the battery to achieve uniform heat dissipation and avoid local overheating, improve the heat dissipation efficiency, the cooling cavity 16 is communicated with the inlet and outlet ports 9 to ensure the smooth flow of the cooling liquid and maintain stable heat dissipation effect, the sealing strip 17 can effectively prevent the cooling liquid from leaking to ensure the sealing of the cooling system and improve the stability of the cooling effect, the fixed buckle 19 makes the connecting port 20 and the inlet and outlet ports 9 connected firmly to prevent loosening or leakage during use, ensure the normal work of the pressure relief valve 21, the bottom plate 2 is connected with the upper cover 10 through the top frame 13, the connection mode is simple and reliable, convenient for installation and disassembly, and the overall structural stability of the battery pack is ensured, the exhaust port 14 can timely discharge the gas generated in the battery pack to prevent the gas from accumulating to cause the internal pressure to be too high, and further improve the safety of the battery pack.

[0038] As shown in Figs. 1-4 , the inside of the bottom plate 2 is provided with a battery module, and the middle of the bottom plate 2 and the battery module is provided with an insulating plate.

[0039] Preferably, the battery module arranged in the inner side of the bottom plate 2 is the core part of the whole battery pack, which provides the energy source for the equipment, and the insulating plate arranged in the middle can effectively prevent the leakage phenomenon between the battery module and the bottom plate 2, greatly improving the safety of the battery pack, and ensuring the safety of the user even in a complex working environment, and at the same time, the insulating plate can also play a certain buffering role, reduce the vibration and impact of the battery module in the use process, and prolong the service life of the battery module.

[0040] As shown in Figs. 1-6 The liquid cooling plate 15 is made of steel material, and the outer side of the bottom plate 2 and the upper cover 10 is provided with an insulating plating layer.

[0041] Optionally, the steel material has high strength and good heat conductivity, can withstand a certain pressure, ensure the stability of the liquid cooling plate 15 in the working process, at the same time, the good heat conductivity can quickly transfer the heat generated by the battery to the cooling liquid, improve the heat dissipation efficiency, ensure the battery works in the appropriate temperature range, prolong the service life and performance stability of the battery, the insulating plating layer can effectively prevent the influence of external current on the inside of the battery pack, avoid damage to the battery due to external leakage and the like, improve the safety of the battery pack, at the same time, the insulating plating layer can also play a certain role in moisture-proof and corrosion-proof, protect the bottom plate 2 and the upper cover 10 from being eroded by external environmental factors, prolong the overall service life of the battery pack.

[0042] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part of technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. An automatic pressure relief liquid-cooled battery pack, comprising a battery pack body (1); The bottom plate (2) is arranged at the bottom position of the battery pack body (1), the battery management assembly (4) is arranged at the top position of the battery pack body (1), the electrical connection point (3) is arranged at the right position of the battery management assembly (4), the safety control assembly (5) is arranged at the left position of the battery management assembly (4), the positive connector (7) and the negative connector (8) are arranged at the bottom left and right sides of the safety control assembly (5), the explosion-proof valve (6) is arranged at the top right position of the battery pack body (1), the upper cover (10) is arranged at the top position of the battery pack body (1), the detection port (11) is arranged at the upper position of the upper cover (10), and the dismounting port (12) is arranged at the left side of the detection port (11). characterized in that The inlet and outlet ports (9) are arranged at the top left and right positions of the bottom plate (2), the connectors (18) are arranged at the top positions of the inlet and outlet ports (9), and the pressure relief valve (21) is arranged at the top left position of the battery pack body (1).

2. The self-venting liquid-cooled battery pack of claim 1, wherein: The liquid cooling plate (15) is arranged at the inner position of the bottom plate (2), and the cooling cavity (16) is arranged at the inner position of the liquid cooling plate (15).

3. The self-venting liquid-cooled battery pack of claim 2, wherein: The cooling cavity (16) is connected with the inlet and outlet ports (9) in a through manner, and the sealing strip (17) is arranged at the top position of the cooling cavity (16).

4. The self-venting liquid-cooled battery pack of claim 3, wherein: The connector (18) is arranged at the bottom position of the bottom plate (2), and the connection port (20) is arranged at the bottom position of the connector (18).

5. The self-venting liquid-cooled battery pack of claim 4, wherein: The connector (18) is arranged at the side position of the bottom plate (2), the connection port (20) is fixedly connected with the inlet and outlet ports (9) through the fixing buckle (19).

6. The self-venting liquid-cooled battery pack of claim 5, wherein: The top frame (13) is arranged at the top position of the bottom plate (2), the bottom plate (2) is clamped and connected with the upper cover (10) through the top frame (13), and the exhaust port (14) is arranged at the side position of the bottom plate (2).

7. The self-venting liquid-cooled battery pack of claim 1, wherein: The battery module is arranged at the inner position of the bottom plate (2), and the insulating plate is arranged at the middle position of the bottom plate (2) and the battery module.

8. The self-venting liquid-cooled battery pack of claim 2, wherein: The liquid cooling plate (15) is made of steel material, and the insulating plating layer is arranged at the outer position of the bottom plate (2) and the upper cover (10).

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