A lithium-ion battery pack device with a thermal management system

Abstract

The present invention relates to the technical field of battery packs, and more specifically discloses a lithium-ion battery pack device with a thermal management system, including a battery body. A battery housing is fixedly connected to the outside of the battery body. Fire protection modules are fixedly connected to the top and bottom of the battery body. A battery assembly control module is fixedly connected to the front of the battery body. A sampling module is fixedly connected to the front of the battery assembly control module. A reaction linkage frame is movably connected inside the fire protection module; by providing a reaction moving device, when the battery pack generates high temperature, the inert gas in the double chambers of the reaction moving device expands due to heat or generates a slight displacement to the other side due to the extrusion force, so that a gap is generated between the edge of the reaction moving device and the inner wall of the reaction housing, and the reaction is started, and reaction measures are taken for accidents such as battery combustion or bulging, achieving the effect of protecting the battery body and the life and property safety of users.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and more specifically to a lithium-ion battery pack device with a thermal management system. Background Art

[0002] Lithium-ion batteries are one of the power sources currently used in new energy vehicles. Due to their good stability and high capacity, they are often the preferred power source for electric vehicles. However, due to frequent safety accidents involving new energy batteries, lithium-ion battery packs with thermal management systems have attracted much attention.

[0003] The lithium-ion battery pack device with a thermal management system currently consists of a battery case, a sampling module, a battery assembly control module, a heating unit, a liquid cooling unit, a filling unit and an alarm unit. The sampling module detects the battery voltage and temperature during the charging and discharging process through sensors and circuit monitoring elements to ensure that various parameters are within the specified range. The heating unit heats the battery and its circuits in an extremely cold environment to reduce the circuit resistance value during the charging and discharging process to ensure that the charging and discharging process is normal. The liquid cooling unit cools the battery in a high temperature environment to reduce the circuit resistance value while ensuring that the battery temperature is not too high to cause an accident. The alarm unit will cut off the power if it detects excessive temperature during battery charging and discharging, and prompt surrounding personnel through a buzzer and other devices.

[0004] Since lithium battery materials begin to undergo side reactions at around 80 degrees, the cooling effect of existing alarm units and cooling units is limited. The cooling units are not able to meet safety requirements in various environments such as hot summer weather, circuit heating, or circuit short circuits and sparks. Existing lithium-ion battery packs do not have the ability to handle safety hazards such as circuit fires or battery bulging. There is still room for improvement in their safety and ensuring user personal safety. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a lithium-ion battery pack device with a thermal management system to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: A lithium-ion battery pack device with a thermal management system, including a battery main body, a battery housing is fixedly connected to the outside of the battery main body, a fire protection module is fixedly connected to the top and bottom of the battery main body, a battery assembly control module is fixedly connected to the front of the battery main body, a sampling module is fixedly connected to the front of the battery assembly control module, a reaction linkage frame is movably connected inside the fire protection module, a fire protection reaction unit is fixedly connected inside the fire protection module, the fire protection reaction unit includes a reaction housing, the reaction housing includes a unit housing, a flow groove is opened on the outside of the unit housing, a unit connection block is fixedly connected to the front of the unit housing, a unit connection groove is opened on the front of the unit connection block, a plurality of bubble outlets are opened on the outside of the flow groove, a housing connecting rod is fixedly connected inside the unit housing, a displacement block is fixedly connected to the outside of the housing connecting rod, a reaction main body is fixedly connected to the back of the reaction housing, the reaction main body includes a main body housing, a main partition plate is fixedly connected to the front of the main body housing, a main connection hole is opened on the front of the main partition plate, a constant pressure hole is opened on the front of the main connection hole on the outside of the main body housing, two annular stoppers are fixedly connected to the inside of the main body housing, a threaded connection groove is opened on the back of the constant pressure hole, a ventilation groove is opened on the back of the threaded connection groove, a reaction moving device is fixedly connected inside the reaction housing, a liquid blocking disk is fixedly connected to the front of the constant pressure hole, and a rotating positioning rod is fixedly connected to the inside of the constant pressure hole;

[0007] Further, the fire protection module includes a module housing, a plurality of unit fixing frames are fixedly connected to the inside of the module housing, a plurality of linkage fixing frames are fixedly connected to the inside of the module housing, the reaction linkage frame includes a linkage main board, two linkage connection blocks are fixedly connected to the front of the linkage main board, a linkage long rod is fixedly connected to the back of the linkage main board behind the linkage connection blocks, a linkage sub-board is fixedly connected to the outside of the linkage long rod, a plurality of unit fixing rods are fixedly connected to the back of the linkage sub-board, a linkage locking block is fixedly connected to the back of the linkage long rod, and a linkage locking block is fixedly connected to the back of the unit fixing rod.

[0008] Further, the reaction moving device includes a moving housing, a sub-partition plate is fixedly connected to the front of the moving housing, a connecting cylinder is fixedly connected to the front of the moving housing, a moving connection hole is opened on the front of the connecting cylinder, a moving positioning rod is fixedly connected to the back of the moving housing, a sliding plate is fixedly connected to the back of the moving positioning rod, and a fixed sliding groove is opened in the moving connection hole.

[0009] Further, the rotary positioning rod includes a rotary main rod, a threaded rod is fixedly connected to the back surface of the rotary main rod, a moving transmission groove is formed in the front surface of the rotary main rod, and a pushing ring is fixedly connected to the front surface of the outer side of the rotary main rod.

[0010] Further, the main partition plate divides the interior of the main body housing into two chambers, a large amount of aluminum sulfate and sodium bicarbonate liquids are respectively placed in the two chambers, a water stop rubber ring is installed on the outer side of the liquid blocking disc, the liquid blocking disc is installed between the annular block and the main partition plate, the position of the constant pressure hole is the same as the position of the annular block, and the length of the fixed sliding groove is 1.5 times the length of the displacement block.

[0011] Further, a spring is movably connected to the outer side of the housing connecting rod at the back of the displacement block, one end of the housing connecting rod is fixedly connected to the bottom of the moving connection hole through a small amount of glue, the distance from the bubble outlet to the front end of the housing connecting rod is the same as the moving distance of the displacement block in the fixed sliding groove, and the bubble outlet is opened at the bottom of the flow groove and has a certain inclination angle.

[0012] Further, linkage locking blocks are fixedly connected to the back surfaces of the unit fixing rod and the linkage long rod. The linkage locking block on the back surface of the linkage long rod is movably connected to the inside of the next linkage connecting block, and the linkage locking block on the back surface of the unit fixing rod is movably connected to the inside of the unit connection groove. The internal structure of the linkage connecting block is the same as that of the unit connection groove, and the internal width of the unit connection groove is twice the width of the linkage locking block.

[0013] Further, a small amount of aluminum sulfate and sodium bicarbonate liquids are respectively placed in the two chambers on both sides of the sub-partition plate, and the liquid accounts for one-third of the total volume. The remaining volume is filled with inert gas.

[0014] Further, a fixing groove for the pushing ring is formed on the back surface of the liquid blocking disc. The moving transmission groove includes a circular groove and a rectangular groove. A single-turn thread groove is formed on the outer side of the threaded rod, and the threaded rod is fixedly connected to the threaded connection groove through the thread groove.

[0015] The technical effects and advantages of the present invention:

[0016] 1. By providing a reaction moving device, when the battery pack generates high temperature, the inert gas in the two chambers of the reaction moving device expands due to heat or is affected by extrusion force at high temperature, resulting in a slight displacement to the other side, so that a gap is generated between the edge of the reaction moving device and the inner wall of the reaction housing, and the reaction is started, and reaction measures are taken for accidents such as battery combustion or bubbling, achieving the effect of protecting the battery main body and the life and property safety of users.

[0017] 2. The present invention is provided with a reaction main body and a reaction linkage frame, which is conducive to expanding the reaction effect, realizing the interlocking effect between fire-fighting reaction units by using the self-driving force generated by the reaction, so as to achieve the function of comprehensive reaction in case of an accident anywhere, and is conducive to achieving the function of isolating air with foam and blocking combustion of the battery main body through mutual action.

[0018] 3. The present invention is provided with a linkage locking block, which is conducive to avoiding misreaction caused by battery movement and deformation of its own material while realizing the linkage effect, and is conducive to improving the stability during battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the fire-fighting module structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the unit fixing frame structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the reaction linkage frame structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the fire-fighting reaction unit structure of the present invention.

[0024] Figure 6 It is a sectional view of the fire-fighting reaction unit structure of the present invention.

[0025] Figure 7 It is a schematic diagram of the reaction housing structure of the present invention.

[0026] Figure 8 It is a schematic diagram of the reaction main body structure of the present invention.

[0027] Figure 9 It is a schematic diagram of the reaction moving device structure of the present invention.

[0028] Figure 10 It is a sectional view of the reaction moving device structure of the present invention.

[0029] Figure 11 It is a sectional view of the rotating positioning rod structure of the present invention.

[0030] The reference numerals are: 1, battery main body; 2, battery housing; 3, sampling module; 4, battery assembly control module; 5, fire protection module; 501, module housing; 502, unit fixing bracket; 503, linkage fixing bracket; 6, reaction linkage bracket; 601, linkage main board; 602, linkage connection block; 603, linkage long rod; 604, linkage sub-board; 605, unit fixing rod; 606, linkage locking block; 7, fire protection reaction unit; 701, reaction housing; 7011, unit housing; 7012, flow channel; 7013, unit connection block; 7014, unit connection groove; 7015, bubble outlet; 7016, housing connecting rod; 7017, displacement block; 702, reaction main body; 7021, main body housing; 7022, main partition board; 7023, main connection hole; 7024, constant pressure hole; 7025, annular stop block; 7026, threaded connection groove; 7027, ventilation groove; 703, reaction moving device; 7031, moving housing; 7032, sub-partition board; 7033, connecting cylinder; 7034, moving connection hole; 7035, moving positioning rod; 7036, sliding plate; 7037, fixed sliding groove; 704, liquid blocking disc; 705, rotating positioning rod; 7051, rotating main rod; 7052, threaded rod; 7053, moving transmission groove; 7054, pushing ring. Detailed implementation manners

[0031] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and a lithium-ion battery pack device with a thermal management system involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0032] Refer to Figure 1 and Figures 5 - 9, the present invention provides a lithium-ion battery pack device with a thermal management system, including a battery main body 1. A battery housing 2 is fixedly connected to the outside of the battery main body 1. Fire protection modules 5 are fixedly connected to the top and bottom of the battery main body 1. A battery assembly control module 4 is fixedly connected to the front of the battery main body 1. A sampling module 3 is fixedly connected to the front of the battery assembly control module 4. A reaction linkage frame 6 is movably connected inside the fire protection module 5. A fire reaction unit 7 is fixedly connected inside the fire protection module 5. The fire reaction unit 7 includes a reaction housing 701. The reaction housing 701 includes a unit housing 7011. Flow grooves 7012 are formed on the outside of the unit housing 7011. A unit connection block 7013 is fixedly connected to the front of the unit housing 7011. A unit connection groove 7014 is formed on the front of the unit connection block 7013. A plurality of bubble outlets 7015 are formed on the outside of the flow grooves 7012. An outer housing connecting rod 7016 is fixedly connected inside the unit housing 7011. A displacement block 7017 is fixedly connected to the outside of the outer housing connecting rod 7016. A reaction main body 702 is fixedly connected to the back of the reaction housing 701. The reaction main body 702 includes a main body housing 7021. A main partition plate 7022 is fixedly connected to the front of the main body housing 7021. A main connection hole 7023 is formed on the front of the main partition plate 7022. A constant pressure hole 7024 is formed on the front of the main body housing 7021 outside the main connection hole 7023. Two annular stoppers 7025 are fixedly connected to the inside of the main body housing 7021. A threaded connection groove 7026 is formed on the back of the constant pressure hole 7024. A ventilation groove 7027 is formed on the back of the threaded connection groove 7026. A reaction moving device 703 is fixedly connected inside the reaction housing 701. A liquid blocking disk 704 is fixedly connected to the front of the constant pressure hole 7024. A rotating positioning rod 705 is fixedly connected inside the constant pressure hole 7024;

[0033] In this embodiment, it should be specifically noted that: The main difference between this embodiment and the prior art is that in this embodiment, the air expansion and extrusion force generated by high temperature or bubbling extrusion are used to cause a large amount of aluminum sulfate and sodium bicarbonate liquids to react to wrap the battery main body and block the battery combustion, achieving the effect of avoiding a large amount of property losses caused by battery combustion. Specifically, it lies in the fire reaction unit 7.

[0034] The above structure is the main structure of this embodiment, which solves the problem that the cooling unit cannot handle the fire that has occurred in the event of a fire accident or an accident such as battery bulging. The battery main body 1, the sampling module 3, and the battery assembly control module 4 are existing structures. The specific connection methods and detailed structural relationships thereof are not specifically described in this embodiment. In addition, the battery housing 2 also belongs to the prior art. Therefore, no detailed explanation is given in this application.

[0035] Refer to Figures 2 - 4, the fire protection module 5 includes a module housing 501. Inside the module housing 501, a plurality of unit fixing brackets 502 are fixedly connected. Inside the module housing 501, a plurality of linkage fixing brackets 503 are fixedly connected. The reaction linkage frame 6 includes a linkage main board 601. On the front of the linkage main board 601, two linkage connection blocks 602 are fixedly connected. On the back of the linkage main board 601 and located on the back of the linkage connection blocks 602, a linkage long rod 603 is fixedly connected. On the outside of the linkage long rod 603, a linkage sub-board 604 is fixedly connected. On the back of the linkage sub-board 604, a plurality of unit fixing rods 605 are fixedly connected. On the back of the linkage long rod 603, a linkage locking block 606 is fixedly connected. On the back of the unit fixing rods 605, a linkage locking block 606 is fixedly connected.

[0036] In this embodiment, it should be specifically noted that: the main partition board 7022 divides the interior of the main housing 7021 into two chambers. A large amount of aluminum sulfate and sodium bicarbonate liquids are placed in the two chambers respectively. A water-stop rubber ring is installed on the outside of the liquid blocking disk 704. The liquid blocking disk 704 is installed between the annular blocking block 7025 and the main partition board 7022. The annular blocking block 7025 plays a blocking role for it. The position of the constant pressure hole 7024 is the same as the position of the annular blocking block 7025, which is beneficial to keeping the gap between the reaction moving device 703 and the liquid blocking disk 704 consistent with the external pressure. The length of the fixed sliding groove 7037 is 1.5 times the length of the displacement block 7017. The displacement block 7017 is located on the back of the fixed sliding groove 7037 under normal conditions, which plays three roles. One is that it is beneficial for a certain distance displacement to occur between the reaction housing 701 and the reaction moving device 703. The size of the displacement distance is related to the position of the bubble outlet 7015. The second is to prevent the reaction housing 701 and the reaction moving device 703 from detaching during displacement. Due to the reaction of aluminum sulfate and sodium bicarbonate liquids, the foam generated makes the space occupancy increase by about two times. If the reaction housing 701 and the reaction moving device 703 are detached, the effect of a large amount of foam overflowing from the bubble outlet 7015 to generate a rotational force cannot be achieved. Preventing the reaction housing 701 and the reaction moving device 703 from detaching is also beneficial for transmitting the rotational force by using the connection relationship between the displacement block 7017 and the reaction moving device 703. This is the third role.

[0037] On the outside of the outer shell connecting rod 7016 and located on the back of the displacement block 7017, a spring is movably connected. One end of the outer shell connecting rod 7016 is fixedly connected to the bottom of the moving connection hole 7034 through a small amount of glue. The starting melting temperature of the used glue is 135 degrees Celsius. After the glue melts, the spring serves the purpose of separating the reaction outer shell 701 from the reaction moving device 703 to initiate the initial reaction. The distance from the bubble outlet 7015 to one end of the front of the outer shell connecting rod 7016 is the same as the moving distance of the displacement block 7017 within the fixed sliding groove 7037. The bubble outlet 7015 is opened at the bottom of the flow groove 7012 and has a certain inclination angle, which is conducive to generating a certain rotational force when the foam overflows. The back of the ventilation groove 7027 is in communication with the outside, which is conducive to keeping the internal pressure of the threaded connection groove 7026 the same as the outside, and is conducive to preventing the negative pressure suction generated by the closed space of the threaded connection groove 7026 from affecting the rotation effect during rotation.

[0038] Linkage locking blocks 606 are fixedly connected to the backs of both the unit fixed rod 605 and the linkage long rod 603. The linkage locking block 606 on the back of the linkage long rod 603 is movably connected inside the next linkage connection block 602, and the linkage locking block 606 on the back of the unit fixed rod 605 is movably connected inside the unit connection groove 7014. The internal structure of the linkage connection block 602 is the same as that of the unit connection groove 7014. The internal width of the unit connection groove 7014 is twice the width of the linkage locking block 606, which is conducive to playing a certain buffering effect when the reaction linkage frame 6 undergoes minor deformation, avoiding accidental activation of the reaction program, and increasing the stability of the device.

[0039] Refer to Figure 10 Refer to

[0040] In this embodiment, it should be specifically noted that: A small amount of aluminum sulfate and sodium bicarbonate liquids are respectively placed in the two chambers on both sides of the sub-separator plate 7032. The liquid accounts for one-third of the total volume, and the remaining volume is filled with inert gas. Both the moving positioning rod 7035 and the sliding plate 7036 are installed inside the moving transmission groove 7053, which is conducive to the sliding of the moving positioning rod 7035 inside the moving transmission groove 7053 when the reaction moving device 703 moves backward.

[0041] Refer to Figure 11, the rotating positioning rod 705 includes a rotating main rod 7051. A threaded rod 7052 is fixedly connected to the back of the rotating main rod 7051. A moving transmission groove 7053 is formed on the front of the rotating main rod 7051. A pushing ring 7054 is fixedly connected to the front of the outer side of the rotating main rod 7051.

[0042] In this embodiment, it should be specifically noted that: a fixing groove for the pushing ring 7054 is formed on the back of the liquid blocking disc 704. The moving transmission groove 7053 includes a circular groove and a rectangular groove. The circular groove is used to buffer the movement of the reaction moving device 703, and the rectangular groove is used to transmit the rotating force. A single-turn thread groove is formed on the outer side of the threaded rod 7052, and the threaded rod 7052 is fixedly connected to the threaded connection groove 7026 through the thread groove.

[0043] The working principle of the present invention:

[0044] The main problem solved by this embodiment is: in the event of a fire accident or battery bulging and other unexpected situations, the fire protection unit takes reaction measures to achieve the effect of protecting the battery body and the safety of the user's life and property;

[0045] The specific steps are as follows: The first stage: When the battery pack generates high temperature, the inert gas in the double cavity on one side of the reaction moving device 703 expands due to high temperature or generates a slight moving force to the other side due to the extrusion force, causing a gap between the edge of the reaction moving device 703 and the inner wall of the reaction housing 701. The aluminum sulfate and sodium bicarbonate placed in the double cavities come into contact and react to generate a large expansion force and a large amount of foam, causing the position of the reaction moving device 703 to move significantly. At the same time, the displacement block 7017 slides inside the fixed sliding groove 7037 until it reaches the end close to the edge. When the edge of one side of the reaction moving device 703 moves away from the foam outlet 7015, the foam is discharged to the outside through the foam outlet 7015. Due to the certain inclination angle of the foam outlet 7015, a certain rotating force is generated during the discharge process, and the reaction housing 701 drives the reaction moving device 703 and the rotating positioning rod 705 to rotate, causing the threaded rod 7052 to disengage from the threaded connection groove 7026, and causing the rotating positioning rod 705 to move a certain distance towards one side of the reaction moving device 703;

[0046] The second stage: During the movement of the rotating positioning rod 705, since the gap between the pushing ring 7054 and the liquid blocking disc 704 is smaller than its moving distance, the pushing ring 7054 generates a pushing force towards the reaction housing 701 side on the liquid blocking disc 704, causing it to disengage from the fixation of the annular block 7025. At this time, the aluminum sulfate and sodium bicarbonate liquids on both sides of the main partition plate 7022 come into contact and react rapidly to generate a greater force;

[0047] The third stage: When the fire reaction unit 7 fixed at any position inside the fire module 5 undergoes the above-stage reaction, a force will be generated to push the reaction housing 701 away from the reaction main body 702. During the process of the reaction housing 701 separating from the reaction main body 702, since the unit fixing rod 605 is fixed inside the unit connection groove 7014, the movement of the reaction housing 701 drives the movement of the reaction linkage frame 6 at the same time, causing a row of reaction housings 701 on the unit fixing frame 502 to separate from the reaction main body 702 and then undergo the above reaction. As the reaction progresses, since the linkage locking block 606 at one end of the linkage long rod 603 is fixed inside the next row of linkage connection blocks 602, the reaction linkage frames 6 move relative to each other to enable all the fire reaction units 7 to react. The foam generated after the reaction has a large volume and the liquid reaction is fast, achieving the effect of wrapping the battery main body 1 in a very short time. Since the foam has the effect of blocking the contact between the battery and oxygen, it solves the serious damage to the equipment main body caused by the battery combustion and maximally protects the property safety of users in case of an accident;

[0048] Secondly, it also solves the problem of false reflection caused by the slight movement or deformation of the individual fire reaction unit 7 or reaction linkage frame 6 during the movement of the battery;

[0049] When the reaction linkage frame 6 undergoes slight deformation, since the structure of the linkage connection block 602 is the same as that of the unit connection block 7013 and the height of the unit connection groove 7014 is twice that of the linkage locking block 606, and the minimum thickness of the linkage fixing frame 503 is twice the distance between the linkage main board 601 and the linkage sub-board 604, the linkage locking blocks 606 at one end of the unit fixing rod 605 and the linkage locking block 606 at one end of the linkage long rod 603 will both move inside the unit connection groove 7014 without generating sufficient force to cause the reaction housing 701 to move;

[0050] Secondly, it also solves the problem that the reaction moving device 703 moves or the sealing effect is reduced during the natural state of the battery, causing the reaction moving device 703 to start the reaction;

[0051] A spring is installed inside the movement connection hole 7034 on the outer side of the housing connection rod 7016 and the spring is in a slightly compressed state. One end of the housing connection rod 7016 is fixedly connected to the bottom of the movement connection hole 7034 by glue. In the case of high temperature, the glue melts, and the spring and the air expansion effect act together to generate the first-stage reaction.

Claims

1. A lithium-ion battery pack device with a thermal management system, comprising a battery body, characterized in that: The outer side of the battery main body is fixedly connected with a battery housing. The top and bottom of the battery main body are fixedly connected with a fire protection module. The front of the battery main body is fixedly connected with a battery assembly control module. The front of the battery assembly control module is fixedly connected with a sampling module. A reaction linkage frame is movably connected inside the fire protection module. A fire reaction unit is fixedly connected inside the fire protection module; The fire reaction unit includes a reaction housing. The reaction housing includes a unit housing. A flow groove is formed on the outer side of the unit housing. A unit connection block is fixedly connected to the front of the unit housing. A unit connection groove is formed on the front of the unit connection block. A plurality of bubble outlets are formed on the outer side of the flow groove. A housing connecting rod is fixedly connected inside the unit housing. A displacement block is fixedly connected to the outer side of the housing connecting rod. The back of the reaction housing is fixedly connected with a reaction main body. The reaction main body includes a main body housing. A main partition plate is fixedly connected to the front of the main body housing. A main connection hole is formed on the front of the main partition plate. A constant pressure hole is formed on the front of the main body housing outside the main connection hole. Two annular stoppers are fixedly connected to the inner side of the main body housing. A threaded connection groove is formed on the back of the constant pressure hole. A ventilation groove is formed on the back of the threaded connection groove. A reaction moving device is fixedly connected inside the reaction housing. A liquid blocking disc is fixedly connected to the front of the constant pressure hole. A rotating positioning rod is fixedly connected inside the constant pressure hole; The reaction moving device includes a moving housing. A secondary partition plate is fixedly connected to the front of the moving housing. A connecting cylinder is fixedly connected to the front of the moving housing. A moving connection hole is formed on the front of the connecting cylinder. A moving positioning rod is fixedly connected to the back of the moving housing. A sliding plate is fixedly connected to the back of the moving positioning rod. A fixed sliding groove is formed inside the moving connection hole; A small amount of aluminum sulfate and sodium bicarbonate liquids are respectively placed in two chambers on both sides of the secondary partition plate, and the liquid accounts for one-third of the total volume. The remaining volume is filled with inert gas.

2. The lithium-ion battery pack device with a thermal management system according to claim 1, wherein: The fire protection module includes a module housing. A plurality of unit fixing frames are fixedly connected inside the module housing. A plurality of linkage fixing frames are fixedly connected inside the module housing. The reaction linkage frame includes a linkage main board. Two linkage connection blocks are fixedly connected to the front of the linkage main board. A linkage long rod is fixedly connected to the back of the linkage main board behind the linkage connection blocks. A linkage secondary board is fixedly connected to the outer side of the linkage long rod. A plurality of unit fixing rods are fixedly connected to the back of the linkage secondary board. A linkage locking block is fixedly connected to the back of the linkage long rod. A linkage locking block is fixedly connected to the back of the unit fixing rod.

3. The lithium-ion battery pack device with a thermal management system according to claim 1, characterized in that: The rotating positioning rod includes a rotating main rod. A threaded rod is fixedly connected to the back of the rotating main rod. A moving transmission groove is formed on the front of the rotating main rod. A pushing ring is fixedly connected to the front of the outer side of the rotating main rod.

4. The lithium-ion battery pack device with a thermal management system according to claim 1, characterized in that: The main partition divides the interior of the main body housing into two chambers, with a large amount of aluminum sulfate and sodium bicarbonate liquids placed in the two chambers respectively. A water-stop rubber ring is installed on the outer side of the liquid blocking disc. The liquid blocking disc is installed between the annular block and the main partition. The position of the constant pressure hole is the same as that of the annular block. The length of the fixed sliding groove is 1.5 times the length of the displacement block.

5. The lithium-ion battery pack device with a thermal management system according to claim 1, characterized in that: A spring is movably connected to the outer side of the housing connecting rod on the back of the displacement block. One end of the housing connecting rod is fixedly connected to the bottom of the moving connection hole through a small amount of glue. The distance from the bubble outlet to the front end of the housing connecting rod is the same as the moving distance of the displacement block in the fixed sliding groove. The bubble outlet is opened at the bottom of the flow groove and has a certain inclination angle.

6. The lithium-ion battery pack device with a thermal management system according to claim 2, characterized in that: Linkage locking blocks are fixedly connected to the backs of both the unit fixing rod and the linkage long rod. The linkage locking block on the back of the linkage long rod is movably connected to the inside of the next linkage connection block. The linkage locking block on the back of the unit fixing rod is movably connected to the inside of the unit connection groove. The internal structure of the linkage connection block is the same as that of the unit connection groove. The internal width of the unit connection groove is twice the width of the linkage locking block.

7. A lithium-ion battery pack device with a thermal management system according to claim 3, characterized in that: A fixing groove for the pushing ring is formed on the back of the liquid blocking disc. The moving transmission groove includes a circular groove and a rectangular groove. A single-turn thread groove is formed on the outer side of the threaded rod. The threaded rod is fixedly connected to the threaded connection groove through the thread groove.

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