New energy power battery pack structure

Abstract

The invention discloses a new energy power battery pack structure, and the structure comprises a protection shell which comprises a shell and a cover plate, and the top surface of the shell is fixedly connected with the cover plate in a sealing manner; the cooling unit comprises a fixing frame, the fixing frame is detachably connected with the power battery, and the peripheral side face of the fixing frame is fixedly connected with the inner wall of the shell; a plurality of water channels are embedded in the fixing frame, penetrate through the shell and the fixing frame respectively and are communicated with the outside; the water channel is communicated with the fixing frame; one water channel is communicated with an external cooling liquid supply unit; a motor column of the power battery penetrates through the cover plate and is hermetically and fixedly connected with the cover plate; the safety assembly comprises a bracket and a repairing agent, the bracket is arranged between the bottom surface of the inner cavity of the shell and the bottom surface of the power battery, and the repairing agent is embedded in the bracket. The overheated power battery in the battery pack can be emphatically cooled by utilizing the cooling unit, and the battery pack can be temporarily repaired through the repairing agent after being collided, so that an automobile can continue to run conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy power batteries, and in particular to a new energy power battery pack structure. Background Art

[0002] The new energy power battery pack is the core component of new energy vehicles. It is responsible for storing electrical energy and providing power for the vehicle. It is a box for storing electrical energy. It is composed of multiple battery cells to form a module, and then multiple modules to form the final battery pack. The battery pack usually also contains BMS (battery management system), TMS (temperature management system), wiring harness, bracket and other components. It is widely used in new energy vehicles, energy storage systems, drones, mobile communications and other fields. In the field of new energy vehicles, the power battery pack is a core component that directly affects the vehicle's range and charging efficiency.

[0003] Because power batteries are widely used in the field of new energy vehicles, however, because of their large weight, they are mostly installed on the chassis of the car. During the driving process of the car, they will continuously consume the power of the battery pack and generate a large amount of heat. Also, because the road conditions on which the car is driving are very complicated, it is inevitable that the chassis will be bumped. In severe cases, the battery pack may rupture, and the rupture of the battery pack may cause the loss of coolant, which will cause the thermal management of the battery pack to be out of control, posing a serious threat to the safe driving of the car. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a new energy power battery pack structure, which can focus on dissipating the heat of overheated power batteries in the battery pack by utilizing a cooling unit, and can achieve temporary repair of the battery pack through a repair agent when it is bumped, so that the car can continue to drive.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A new energy power battery pack structure, comprising:

[0007] A protective shell, used to defend against external impact force, comprises a shell and a cover plate, wherein the top surface of the shell is sealed and fixedly connected to the cover plate;

[0008] A cooling unit, used to fix and cool all the power batteries in the battery pack, comprising a fixing frame, the fixing frame is detachably connected to the power battery, and the peripheral side surfaces of the fixing frame are respectively fixedly connected to the inner wall of the shell; a plurality of water channels are embedded in the fixing frame, and the water channels respectively penetrate the shell and the fixing frame and are connected to the outside; the water channels are connected to the fixing frame; one of the water channels is connected to an external coolant supply unit; the motor column of the power battery penetrates the cover plate and is sealed and fixedly connected to the cover plate;

[0009] The insurance component is used to repair the shell rupture, which includes a bracket and a repair agent. The bracket is arranged between the bottom surface of the shell cavity and the bottom surface of the power battery, and the repair agent is embedded in the bracket.

[0010] Preferably, the fixing frame includes a ring frame and a plurality of fixing frames, the inner walls of the fixing frames are adapted to and fixedly connected to the power battery, and a plurality of elastic patches are fixedly connected between adjacent fixing frames and between the fixing frames and the inner walls of the ring frames; elastic sealing plates are fixedly connected to the top ends of the opposite side walls of adjacent fixing frames; the sealing plates and the opposite side walls of adjacent fixing frames enclose a cooling cavity; the cooling cavity is connected to the water channel; the inner wall of the ring frame is fixedly connected to and communicated with the water channel; the outer wall of the fixing frame is fixedly connected to the water channel.

[0011] Preferably, the fixing frame is made of elastic aluminum alloy, and the sealing plate and the sticker are both made of elastic polyurethane.

[0012] Preferably, the water channel is a hollow cubic plate-like structure, and two groups of guide components are fixedly connected to the inner wall of the water channel at equal intervals, and the two groups of guide components are arranged opposite to each other. The guide components include a diverter block and a guide block, and a guide cavity is formed between the two guide blocks, and the guide cavity is inclined toward the outflow direction of the cooling water in the water channel; the inner wall corners of the guide cavity are chamfered; the diverter block is a streamlined structure, and the tip of the diverter block is arranged toward the opening of the guide cavity; the side wall of the water channel is provided with a plurality of outflow holes, and the outflow holes are connected to the cooling cavity.

[0013] Preferably, the diverter block in one of the flow guide components is arranged opposite to one end of the flow guide block in another of the flow guide components.

[0014] Preferably, the bracket is a frame-shaped structure, a plurality of mounting holes are provided at equal intervals on the top surface of the bracket, a plurality of rupture plates are fixedly connected in the mounting holes, the repair agent is placed on the top surface of the rupture plates; the repair agent is arranged in the mounting holes; the top surface of the bracket is arranged to conflict with the bottom surface of the power battery.

[0015] Preferably, the repair agent includes a water absorbent and a water coagulant, the water absorbent includes polymer water-absorbing resin particles and a first mesh bag, the first mesh bag is a sealed plastic bag made of polypropylene, polyester or nylon; the water-absorbing resin particles are placed in the first mesh bag; the water coagulant includes fast-hardening sulphoaluminate cement with a coagulant added and a second mesh bag, the second mesh bag is made of the same material as the first mesh bag, and the fast-hardening sulphoaluminate cement is placed in the second mesh bag.

[0016] Preferably, the repair agent is in contact with the top surface of the rupture plate, and the water coagulant is in contact with the repair agent.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] The present invention uses a fixing frame to fix the power battery to prevent the power battery from shaking due to vibration or movement during use, thereby preventing the power battery from rubbing against other components and causing damage to the power battery. At the same time, the water channel can use the supply unit to continuously flush the coolant into the cooling chamber, contact the outer side of the power battery, exchange the heat generated by the power battery during use, and conduct it from the water channels on both sides of the power battery. At the same time, when the bottom surface of the battery pack is impacted and ruptured, the bracket will be squeezed to break the repair agent, and the repair agent and cooling water will react to generate condensed water and solidification reaction, and the rupture will be blocked by gel to prevent the coolant from leaking, causing the power battery to fail and causing inconvenience to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a side view stereoscopic structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the main structure of some insurance components;

[0023] Figure 4 Schematic diagram of the internal structure of the flow channel;

[0024] Figure 5 for Figure 4 The enlarged structural diagram at A in the middle;

[0025] Among them, 1. shell; 2. cover plate; 3. water channel; 4. power battery; 5. bracket; 6. water absorbent; 7. water condensing agent; 8. ring frame; 9. fixing frame; 10. sticker; 11. sealing plate; 12. cooling chamber; 13. diverter block; 14. guide block; 15. guide chamber; 16. outflow hole; 17. mounting hole; 18. rupture plate; 19. one-way valve. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that all components in the technical solution of this application require the necessary additional facilities of water supply, oil supply, electricity supply and gas supply to be driven and / or controlled. If there is no further explanation, it is assumed that the existing technology is used and equipped without special explanation.

[0028] It should be noted that, in order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Depend on Figure 1-5 A new energy power battery pack structure shown includes:

[0030] The protective shell is used to defend against external impact force, and comprises a shell 1 and a cover plate 2, wherein the top surface of the shell 1 is sealed and fixedly connected to the cover plate 2;

[0031] The cooling unit is used to fix and cool all the power batteries 4 inside the battery pack, and includes a fixing frame, which is detachably connected to the power battery 4, and the peripheral side surfaces of the fixing frame are respectively fixedly connected to the inner wall of the shell 1; a plurality of water channels 3 are embedded in the fixing frame, and the water channels 3 respectively penetrate the shell 1 and the fixing frame and are connected to the outside; the water channels 3 are connected to the fixing frame; one of the water channels 3 is connected to the external coolant supply unit; the motor column of the power battery 4 penetrates the cover plate 2 and is sealed and fixedly connected to the cover plate 2;

[0032] The insurance component is used to repair the crack of the shell 1, which includes a bracket 5 and a repair agent. The bracket 5 is arranged between the bottom surface of the inner cavity of the shell 1 and the bottom surface of the power battery 4, and the repair agent is embedded in the bracket 5.

[0033] Further optimization scheme, the fixed frame includes a ring frame 8 and a plurality of fixed frames 9, all the power batteries 4 are arranged at equal intervals and divided into a plurality of rows and columns, and water channels 3 are sandwiched between adjacent columns, and three adjacent water channels 3 form a group. The water channel 3 in the middle is the main pipeline for cooling water to enter, and the other two water channels 3 respectively penetrate the ring frame 8 and the shell 1, and are connected to the external cooling circulation water circuit. The inner wall of the fixed frame 9 is adapted to the power battery 4 and fixedly connected by adhesive. A plurality of elastic stickers 10 are fixedly connected between adjacent fixed frames 9 and between the fixed frame 9 and the inner wall of the ring frame 8. When the power battery 4 shakes or swells and deforms due to charging, the power battery 4 can be compensated by the contraction of the stickers 10 to prevent the battery pack from expanding and rupturing. The top of the opposite side wall of the adjacent fixed frame 9 is fixedly connected with an elastic sealing plate 11. The sealing plate 11 and the opposite side wall of the adjacent fixed frame 9 enclose a cooling chamber 12. The sealing plate 11, the fixed frame 9, the ring frame 8 and the power battery 4 can seal the cooling water below the sealing plate 11 to prevent contact with the electrode column of the power battery 4 and cause a short circuit. The cooling chamber 12 is connected to the water channel 3, and the inner wall of the ring frame 8 is fixedly connected and connected to the water channel 3; the outer wall of the fixed frame 9 is fixedly connected to the water channel 3.

[0034] Further optimization scheme, the fixing frame 9 is made of elastic aluminum alloy, which can be deformed to a certain extent after being subjected to external force, and quickly return to its original state after the external force disappears, which makes them very suitable for occasions that need to withstand repeated stress or vibration. The specific model is 2014-T4, 2014-T6, 2017-T6, 7075-T6 aluminum alloy, 6061-T6 aluminum alloy. The sealing plate 11 and the patch 10 are both made of elastic polyurethane.

[0035] A further optimization scheme is that the water channel 3 is a hollow cubic plate structure, and two groups of guide components are fixedly connected to the inner wall of the water channel 3 at equal intervals. The two groups of guide components are arranged oppositely, and the guide components include a diverter block 13 and a guide block 14. A guide cavity 15 is formed between the two guide blocks 14, and the guide cavity 15 is inclined toward the outflow direction of the cooling water in the water channel 3. When the cooling water enters from the water inlet of the water channel 3, it will flow from the area between the two guide blocks 14 arranged opposite to each other up and down. At this time, the flow direction of the cooling water is arranged opposite to the inclination direction of the guide cavity 15, which can achieve the reduction of the resistance generated by the water flow when the water flows through. At the same time, when the water flows in the opposite direction, the water flow will impact into the guide cavity 15 and be split into two streams by the guide block 14. The two streams will re-enter the main channel of the water channel 3 after being guided by the guide cavity 15, but their flow directions are opposite, which will produce great resistance to the water flow, resulting in poor water flow and a significant reduction in water pressure. The inner wall corners of the guide cavity 15 are all chamfered; the diverter block 13 is a streamlined structure, and the tip of the diverter block 13 is arranged toward the opening of the guide cavity 15; a plurality of outflow holes 16 are opened on the side wall of the water channel 3, and the outflow holes 16 are connected to the cooling cavity 12.

[0036] Furthermore, a plurality of water inlet holes are evenly spaced on the top surface of the water channel 3 serving as the main pipeline, and the water inlet holes are fixedly connected and connected to a one-way valve 19, which is connected to an external coolant supply unit, so that cooling water can be supplied to different water inlets through the temperature collector on the power battery 4 and the external coolant supply unit controlled by the BMS battery management system unit of the battery pack, thereby realizing precise temperature control of the power battery 4 and ensuring that the power battery 4 works in the most suitable temperature range. The temperature collector, the BMS battery management system unit and the external coolant supply unit are all prior art and will not be described in detail here. Because cooling water is poured into the middle of the water channel 3, the water flow will cause most of the cooling water to flow toward the outlet of the water channel 3 due to the resistance of the reverse flow, and then the power battery after the filling port can be controlled.

[0037] A further optimized solution is that the diverter block 13 in one diversion component is arranged opposite to one end of the diversion block 14 in another diversion component. The staggered arrangement of the two diversion components can utilize the diversion cavity 15 to fully reduce the water pressure of the water flow when the water flows through the diversion cavity 15.

[0038] Further optimization scheme, the bracket 5 is a frame-shaped structure, and a plurality of mounting holes 17 are opened at equal intervals on the top surface of the bracket 5. A plurality of rupture plates 18 are fixedly connected in the mounting holes 17. Two rupture plates 18 are cross-fixed and connected to each other, and the top surfaces of the rupture plates 18 are chamfered, so that when the shell 1 is broken, the rupture plates 18 can be pushed to squeeze the patching agent, and the patching agent can be quickly broken, thereby releasing the patching agent to temporarily repair the hole. The patching agent is placed on the top surface of the rupture plate 18, and the patching agent is set in the mounting holes 17 to prevent the patching agent from being squeezed by the power battery 4 and causing rupture. The top surface of the bracket 5 is set to conflict with the bottom surface of the power battery 4.

[0039] Further optimization scheme, the repair agent includes water absorbent 6 and water coagulating agent 7, the water absorbent 6 includes polymer water-absorbing resin particles and a first mesh bag, the first mesh bag is a sealed plastic bag made of polypropylene, polyester or nylon; the water-absorbing resin particles are placed in the first mesh bag; the water coagulating agent 7 includes fast-hardening sulfoaluminate cement added with a coagulant and a second mesh bag, the second mesh bag is made of the same material as the first mesh bag, and the fast-hardening sulfoaluminate cement is placed in the second mesh bag. The repair agent is attached to the top surface of the rupture plate 18, and the water coagulating agent 7 is attached to the repair agent. Through the water absorption and expansion of the fast-absorbing water-absorbing resin particles, the broken part of the shell 1 can be quickly blocked to prevent the loss of a large flow of coolant, and the fast-hardening sulfoaluminate cement is gathered at the broken part for solidification to achieve temporary repair of the broken part.

[0040] Furthermore, the bracket 5 is a mesh plate, which can facilitate the overall flow of the coolant in the shell 1. At the same time, the top surface of the mounting hole 17 is covered and fixedly connected with a nylon mesh for filtering excess fast-hardening sulphoaluminate cement to prevent it from mixing into the entire cooling water circulation waterway and causing failure of the cooling water circulation waterway.

[0041] The working process of this embodiment is as follows:

[0042] Cooling water is supplied to the water channel 3 through an external coolant supply unit, and the cooling water flows from one end of the water channel 3 to the other end. During the process, the cooling water is continuously diverted into the guide cavity 15 through the outflow hole 16 opened on the side of the water channel 3. Both sides of the guide cavity 15 are in contact with the power battery 4 respectively, thereby realizing the heat exchange operation of the power battery 4.

[0043] When the BMS battery management system unit detects that the temperature of the power battery 4 at certain positions is too high and needs cooling water for focused cooling operations, it will control the external coolant supply unit to inject focused cooling water through several water inlet holes opened on the top surface of the water channel 3, and use a large amount of low-temperature cooling water to cool the power battery 4 with high temperature first, thereby achieving rapid temperature control of the power battery 4.

[0044] At the same time, the water channel 3 can prevent the water from flowing in reverse, thereby avoiding the cooling water from cooling other batteries that do not need to be cooled urgently, and further improving the efficiency of temperature control of the power battery 4.

[0045] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A new energy power battery (4) package structure, characterized in that: include: A protective shell, used for protecting against external impact force, comprising a shell (1) and a cover plate (2), wherein the top surface of the shell (1) is sealed and fixedly connected to the cover plate (2); A cooling unit, used for fixing and cooling all power batteries (4) inside a battery pack, comprising a fixing frame, the fixing frame being detachably connected to the power battery (4), the peripheral side surfaces of the fixing frame being respectively fixedly connected to the inner wall of the shell (1); a plurality of water channels (3) are embedded in the fixing frame, the water channels (3) respectively penetrate the shell (1) and the fixing frame and are connected to the outside; the water channels (3) are connected to the fixing frame; one of the water channels (3) is connected to an external coolant supply unit; the motor column of the power battery (4) penetrates the cover plate (2) and is sealed and fixedly connected to the cover plate (2); A safety component is used to repair a rupture of the shell (1), comprising a bracket (5) and a repair agent, wherein the bracket (5) is arranged between the bottom surface of the inner cavity of the shell (1) and the bottom surface of the power battery (4), and the repair agent is embedded in the bracket (5).

2. The new energy power battery (4) package structure according to claim 1, characterized in that: The fixing frame comprises a ring frame (8) and a plurality of fixing frames (9); the inner wall of the fixing frame (9) is adapted to and fixedly connected with the power battery (4); a plurality of elastic stickers (10) are fixedly connected between adjacent fixing frames (9) and between the fixing frames (9) and the inner wall of the ring frame (8); an elastic sealing plate (11) is fixedly connected to the top of the opposite side wall of the adjacent fixing frame (9); the sealing plate (11) and the opposite side wall of the adjacent fixing frame (9) enclose a cooling cavity (12); the cooling cavity (12) is connected with the water channel (3); the inner wall of the ring frame (8) is fixedly connected with and communicated with the water channel (3); and the outer wall of the fixing frame (9) is fixedly connected with the water channel (3).

3. The new energy power battery (4) package structure according to claim 2 is characterized in that: The fixing frame (9) is made of an elastic aluminum alloy material, and the sealing plate (11) and the patch (10) are both made of an elastic polyurethane material.

4. The new energy power battery (4) package structure according to claim 2 is characterized in that: The water channel (3) is a hollow cubic plate-shaped structure. Two groups of flow guide components are fixedly connected to the inner wall of the water channel (3) at equal intervals. The two groups of flow guide components are arranged opposite to each other. The flow guide components include a diverter block (13) and a diverter block (14). A diverter cavity (15) is formed between the two diverter blocks (14). The diverter cavity (15) is inclined toward the outflow direction of the cooling water in the water channel (3). The inner wall corners of the diverter cavity (15) are all chamfered. The diverter block (13) is a streamlined structure. The tip of the diverter block (13) is arranged toward the opening of the diverter cavity (15). The side wall of the water channel (3) is provided with a plurality of outflow holes (16), and the outflow holes (16) are connected to the cooling cavity (12).

5. The new energy power battery (4) package structure according to claim 4 is characterized in that: The diverter block (13) in one of the flow guide components is arranged opposite to one end of a flow guide block (14) in another of the flow guide components.

6. The new energy power battery (4) package structure according to claim 1, characterized in that: The bracket (5) is a frame-shaped structure. A plurality of mounting holes (17) are provided on the top surface of the bracket (5) at equal intervals. A plurality of rupture plates (18) are fixedly connected in the mounting holes (17). The repair agent is placed on the top surface of the rupture plates (18); the repair agent is arranged in the mounting holes (17); and the top surface of the bracket (5) is arranged to contact the bottom surface of the power battery (4).

7. The new energy power battery (4) package structure according to claim 6, characterized in that: The repair agent comprises a water absorbent (6) and a water coagulating agent (7), wherein the water absorbent (6) comprises polymer water-absorbing resin particles and a first mesh bag, wherein the first mesh bag is a sealed plastic bag made of polypropylene, polyester or nylon; the water-absorbing resin particles are placed in the first mesh bag; the water coagulating agent (7) comprises fast-hardening sulphoaluminate cement added with a coagulant and a second mesh bag, wherein the second mesh bag is made of the same material as the first mesh bag, and the fast-hardening sulphoaluminate cement is placed in the second mesh bag.

8. The new energy power battery (4) package structure according to claim 7, characterized in that: The repairing agent is in contact with the top surface of the rupture plate (18), and the water-condensing agent (7) is in contact with the repairing agent.

Images