Lithium battery pack framework with multi-layer protection

Abstract

The utility model relates to a multi-layer protection lithium battery pack framework applied to the technical field of lithium battery packs, which comprises a mounting base, a concentric-square-shaped protective plate, an outer shell and a heat dissipation air bag, a plurality of buffer elastic cushions are arranged in the middle of the mounting base, and a battery pack body is placed at the tops of the buffer elastic cushions; a plurality of inner one-way valves are mounted on the side wall of the concentric-square-shaped protective plate; a plurality of outer one-way valves are mounted on the side wall of the outer shell; a heat dissipation air bag is arranged on the inner wall of the battery pack framework, a pressing plate is arranged on the top surface of the heat dissipation air bag, the top of the heat dissipation air bag is communicated with an exhaust pipe, and the output end of the exhaust pipe is arranged on the inner side of the concentric-square-shaped protective plate. And heat generated by the battery pack body is carried to the outer side through gas flow, so that heat accumulation at the battery pack body is reduced, and the battery pack body is better cooled.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery pack architecture, in particular to a kind of multi-layer protection lithium battery pack architecture applied to lithium battery pack technical field. BACKGROUND

[0002] Lithium battery is a kind of battery by lithium metal or lithium alloy as negative electrode material, using non-aqueous electrolyte solution, since lithium battery has energy density high, power density high, cycle number of times is more, storage time is long and so on Advantage, often used on electric vehicle, provide higher endurance for electric vehicle.

[0003] The patent application with the publication number CN117673603A discloses a kind of lithium battery protection box, including box main body, the box main body bottom side edge is equipped with handle;The box main body outside is equipped with outer protective box, the inner side wall of the outer protective box and the outer side wall of box main body are supported and assembled by support frame, the inner bottom of the box main body is provided with inner bottom guard plate, the inner bottom guard plate and the inner bottom of box main body are equipped with damping assembly.Dual support protection is carried out to the outside of lithium battery, and the bottom is protected by shock absorption.

[0004] When the above-mentioned scheme is implemented, the box with multiple layers of structure is provided to protect the battery pack, which can achieve a certain protection effect, but the multiple layers of structure affect the heat dissipation of the battery pack. During the use of the battery pack, a certain amount of heat will be generated. The heat cannot be effectively dissipated through the multiple layers of protection structure, which causes certain safety hazards during the use of the battery pack. UTILITY MODEL CONTENT

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is that during the use of the battery pack, a certain amount of heat will be generated. The heat cannot be effectively dissipated through the multiple layers of protection structure, which causes certain safety hazards during the use of the battery pack.

[0006] To solve the above-mentioned problems, the utility model provides a kind of multi-layer protection lithium battery pack architecture, comprising:

[0007] Mounting base, the middle part of mounting base is provided with a plurality of buffer elastic pads, and the battery pack body is placed on the top of buffer elastic pad;

[0008] The backplate is sleeved on the outer circle of the battery pack body, and the side wall of the backplate is provided with a plurality of inner check valves, which are used to make the air on the inner side of the backplate flow to the outer side of the backplate in one direction.

[0009] The outer shell is sleeved on the outer side of the backplate, the bottom of the outer shell is connected with the outer wall of the mounting base, and a plurality of outer check valves are installed on the side wall of the outer shell, which are used to make the air inside the outer shell flow to the outside of the outer shell in one direction.

[0010] The heat dissipation air bag is provided with a pressing plate on the top surface, the end of the pressing plate away from the heat dissipation air bag is arranged on the bottom of the battery pack body, and the top of the heat dissipation air bag is communicated with an exhaust pipe, and the output end of the exhaust pipe is arranged on the inner side of the back-shaped guard plate.

[0011] In the above multi-layer protection lithium battery pack architecture, the gas is input into the inner wall of the back-shaped guard plate through the exhaust pipe, and is discharged to the outer wall of the outer shell through the inner one-way valve and the outer one-way valve, the heat generated by the battery pack body is carried to the outside through the gas flow, thereby reducing the heat accumulation at the battery pack body and better dissipating the heat of the battery pack body.

[0012] As a further improvement of the present application, the back-shaped guard plate is composed of a plurality of transverse partitions and longitudinal partitions alternately spliced, the mounting base is provided with a limiting groove at the corresponding position of the transverse partition and the longitudinal partition, and the bottom of the transverse partition and the longitudinal partition is clamped with the corresponding limiting groove.

[0013] As a further improvement of the present application, the two ends of the transverse partition are fixed with a limiting block one, the two ends of the longitudinal partition are fixed with a limiting block two, the limiting block one and the limiting block two are staggered, and the outer side of the limiting block one and the limiting block two abuts against the inner wall of the outer shell.

[0014] As a further improvement of the present application, the inner cavity of the outer shell is fixed with a buffer cotton pad at the top, the bottom of the buffer cotton pad abuts against the top of the battery pack body, and the outer ring of the buffer cotton pad abuts against the inner wall of the corresponding transverse partition and longitudinal partition.

[0015] As another improvement of the present application, the bottom of the heat dissipation air bag is communicated with an air inlet pipe, the opening of the air inlet pipe extends to the outer side of the mounting base, the inner wall of the heat dissipation air bag is provided with a lower one-way membrane at the corresponding position of the air inlet pipe, the lower one-way membrane is used for one-way circulation of air from the air inlet pipe to the inner cavity of the heat dissipation air bag, and the inner wall of the heat dissipation air bag is provided with an upper one-way membrane at the corresponding position of the exhaust pipe, the lower one-way membrane is used for one-way circulation of air from the inner cavity of the heat dissipation air bag to the exhaust pipe.

[0016] As a further improvement of the present application, the two sides of the heat dissipation air bag are inserted with connecting rods, the end of the connecting rod is fixed with a locking block, and the end of the locking block abuts against the inner wall of the outer shell.

[0017] As a further improvement of the present application, the inner wall of the heat dissipation air bag is provided with a side one-way membrane at the corresponding position of the connecting rod, and the side one-way membrane is used for one-way circulation of air from the inner cavity of the heat dissipation air bag to the end of the connecting rod.

[0018] In summary, the outer wall of the battery pack body is formed with a multi-layer protection structure, which can achieve good protection effect when subjected to external force impact, reduce damage to the battery pack body, reduce the entry of pollutants such as water vapor and dust into the battery pack body, and play a certain dustproof and waterproof effect on the battery pack body. When the battery pack body is subjected to vibration, it will vibrate and repeatedly press down the pressing plate, which compresses the heat dissipation air bag, and the gas is input to the inner wall of the back-shaped guard plate through the exhaust pipe and discharged to the outer wall of the outer shell through the inner and outer one-way valves. The heat generated by the battery pack body is carried to the outside through the gas flow, thereby reducing the heat accumulation of the battery pack body and better dissipating heat from the battery pack body. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the first and second embodiments of the application;

[0020] Figure 2 It is a schematic diagram of the outer shell part of the first and second embodiments of the application;

[0021] Figure 3 It is a schematic diagram of the inner part of the outer shell of the first and second embodiments of the application;

[0022] Figure 4 It is a schematic diagram of the transverse partition plate and longitudinal partition plate structure of the first and second embodiments of the application;

[0023] Figure 5 It is a schematic diagram of the mounting base structure of the first and second embodiments of the application;

[0024] Figure 6 It is a schematic diagram of the heat dissipation air bag of the first and second embodiments of the application.

[0025] Explanation of reference numerals in the drawings:

[0026] 1, outer shell; 2, outer one-way valve; 3, battery pack body; 4, mounting base; 5, transverse partition plate; 6, inner one-way valve; 7, longitudinal partition plate; 8, limiting groove; 9, locking block; 10, exhaust pipe; 11, connecting rod; 12, heat dissipation air bag; 13, buffer elastic pad; 14, pressing plate; 15, air inlet pipe; 16, lower one-way membrane; 17, side one-way membrane; 18, upper one-way membrane. DETAILED DESCRIPTION

[0027] The two embodiments of the application will be described in detail below with reference to the accompanying drawings.

[0028] First embodiment:

[0029] Figures 1-5The application discloses a multi-layer protection lithium battery pack structure which comprises a mounting base 4, a backplate, an outer shell 1 and a heat dissipation air bag 12. The middle part of the mounting base 4 is provided with a plurality of buffer elastic pads 13, the battery pack body 3 is placed on the top of the buffer elastic pads 13, the buffer elastic pads 13 can buffer the vibration received by the battery pack body 3, reduce the impact of the vibration on the battery pack body 3 and reduce the damage. The backplate is sleeved on the outer circle of the battery pack body 3, the side wall of the backplate is provided with a plurality of inner one-way valves 6, the inner one-way valves 6 are used for allowing the air on the inner side of the backplate to flow to the outer side of the backplate in a one-way manner, the heat generated by the battery pack body 3 flows to the outer side of the backplate through the inner one-way valves 6, and the battery pack body 3 is subjected to a certain heat dissipation effect. The outer shell 1 is sleeved on the outer side of the backplate. By arranging the backplate and the outer shell 1 on the outer side of the battery pack body 3, a multi-layer protection structure can be formed on the outer wall of the battery pack body 3, when the battery pack structure is subjected to an external force impact, a better protection effect can be achieved, the damage to the battery pack body 3 is reduced, the bottom of the outer shell 1 is clamped with the outer wall of the mounting base 4, a plurality of outer one-way valves 2 are arranged on the side wall of the outer shell 1, the outer one-way valves 2 are used for allowing the air on the inner side of the outer shell 1 to flow to the outer side of the outer shell 1 in a one-way manner, the heat generated by the battery pack body 3 is conducted to the outer wall of the outer shell 1 through the outer one-way valves 2 after being conducted to the outer side of the backplate, the heat generated by the battery pack body 3 is better released, the outer one-way valves 2 and the inner one-way valves 6 are arranged, the pollutants such as water vapor and dust in the outside world are prevented from entering the battery pack body 3, and a certain dustproof and waterproof performance is achieved on the battery pack body 3. In addition, the top surface of the heat dissipation air bag 12 is provided with a pressing plate 14, one end of the pressing plate 14 away from the heat dissipation air bag 12 is arranged on the bottom of the battery pack body 3, the top of the heat dissipation air bag 12 is communicated with an exhaust pipe 10, and the output end of the exhaust pipe 10 is arranged on the inner side of the backplate. When the battery pack body 3 is subjected to vibration, the battery pack body 3 will vibrate and repeatedly press the pressing plate 14, the pressing plate 14 is compressed to the heat dissipation air bag 12, the gas is input to the inner wall of the backplate through the exhaust pipe 10 and is discharged to the outer wall of the outer shell 1 through the inner one-way valves 6 and the outer one-way valves 2, the heat generated by the battery pack body 3 is carried to the outer side through the gas flow, so that the heat accumulation of the battery pack body 3 is reduced, and the battery pack body 3 is better heat-dissipated.

[0030] It is worth mentioning that the backplate is composed of a plurality of transverse partitions 5 and longitudinal partitions 7 which are alternately spliced, the mounting base 4 is provided with a limiting groove 8 at the positions corresponding to the transverse partitions 5 and the longitudinal partitions 7, the bottom of each of the transverse partitions 5 and the longitudinal partitions 7 is clamped with the corresponding limiting groove 8, the transverse partitions 5 and the longitudinal partitions 7 are clamped with the limiting grooves 8 on the mounting base 4, so that the transverse partitions 5 and the longitudinal partitions 7 are conveniently installed and fixed, and a certain gap is formed between the outer wall of the battery pack body 3 and the inner wall of the outer shell 1, when the battery pack structure is subjected to an impact, a certain buffering effect is achieved.

[0031] In the present embodiment, please refer to Figure 3 and Figure 4 , both ends of the transverse partition plate 5 are fixed with a limiting block one, both ends of the longitudinal partition plate 7 are fixed with a limiting block two, the limiting block one and the limiting block two are staggered, the outer side of the limiting block one and the limiting block two abuts against the inner wall of the outer shell 1, the inner wall of the transverse partition plate 5 and the longitudinal partition plate 7 forms a sealing cavity, the battery pack body 3 is sealed and protected, and through the setting of the limiting block one and the limiting block two, the two ends of the transverse partition plate 5 and the longitudinal partition plate 7 can abut against the inner wall of the outer shell 1, when the outer shell 1 is impacted, the end of the transverse partition plate 5 and the longitudinal partition plate 7 can support the inner wall of the outer shell 1, which can strengthen the impact resistance of the outer shell 1 and improve the overall strength of the battery pack structure.

[0032] In addition, the inner cavity of the outer shell 1 is fixed with a buffer cotton pad at the top, the bottom of the buffer cotton pad abuts against the top of the battery pack body 3, and the outer circle of the buffer cotton pad abuts against the inner wall of the corresponding transverse partition plate 5 and longitudinal partition plate 7, which can buffer the vibration of the battery pack body 3 and form a certain sealing effect in the inner cavity of the transverse partition plate 5 and the longitudinal partition plate 7.

[0033] Second embodiment:

[0034] Figures 4-6 The illustrated multi-layer protected lithium battery pack structure is different from the first embodiment in that the bottom of the heat dissipation air bag 12 is communicated with an air inlet pipe 15, the opening of the air inlet pipe 15 extends to the outer side of the mounting base 4, the inner wall of the heat dissipation air bag 12 is provided with a lower one-way membrane 16 at the corresponding position of the air inlet pipe 15, the lower one-way membrane 16 is used for one-way circulation of air from the air inlet pipe 15 to the inner cavity of the heat dissipation air bag 12, the inner wall of the heat dissipation air bag 12 is provided with an upper one-way membrane 18 at the corresponding position of the air outlet pipe 10, the lower one-way membrane 16 is used for one-way circulation of air from the inner cavity of the heat dissipation air bag 12 to the air outlet pipe 10, when the battery pack structure vibrates, the battery pack body 3 will move up and down, when the battery pack body 3 presses down the pressing plate 14, the heat dissipation air bag 12 will be compressed, during the compression process, the gas in the heat dissipation air bag 12 will flow to the inner wall of the back-shaped guard plate from the upper one-way membrane 18 and the air outlet pipe 10, and after the battery pack body 3 moves up, the heat dissipation air bag 12 resets, the external gas flows into the inner cavity of the heat dissipation air bag 12 through the air inlet pipe 15 and the lower one-way membrane 16, and supplements the gas in the inner cavity of the heat dissipation air bag 12, so during the vibration of the battery pack body 3, the external gas will be pumped into the inner wall of the back-shaped guard plate through the repeated compression of the heat dissipation air bag 12, and then flow to the outside through the inner one-way valve 6 and the outer one-way valve 2, forming a circulating air flow, which circulates the heat to the outside, and has a good heat dissipation effect on the battery pack body 3, without the need to increase additional heat dissipation components, reducing production cost.

[0035] It is worth mentioning that, please refer toFigure 5 And Figure 6 Two sides of the heat dissipation air bag 12 are inserted with connecting rods 11, end portions of the connecting rods 11 are fixed with locking blocks 9, end portions of the locking blocks 9 abut against inner walls of the outer shell 1, in the vibration process, the battery pack structure, the air pressure in the inner cavity of the heat dissipation air bag 12 increases, will push the connecting rods 11 to move away from the heat dissipation air bag 12, and push the locking blocks 9 to abut against the inner walls of the outer shell 1 all the time, reduce the situation that the battery pack structure loosens because of vibration, increase the stability of the structure, in addition, the inner walls of the heat dissipation air bag 12 are provided with side one-way membranes 17 at the corresponding positions of the connecting rods 11, the side one-way membranes 17 are used for making the air unidirectionally flow from the inner cavity of the heat dissipation air bag 12 to the end portions of the connecting rods 11, so that the gas in the heat dissipation air bag 12 unidirectionally flows to the end portions of the connecting rods 11 all the time, thereby pushing the end portions of the connecting rods 11, control the locking blocks 9 to abut against the inner walls of the outer shell 1 all the time, achieve better locking effect.

[0036] In combination with the current actual demand, the above-mentioned embodiments adopted by the present application are not limited to the scope, various changes made within the knowledge range of the technical personnel in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. A multi-layer protected lithium battery pack architecture, characterized in that, The utility model provides a battery pack cooling device, which comprises the following parts: a mounting base (4) provided with a plurality of buffer elastic pads (13) in the middle part, and a battery pack body (3) placed on the top of the buffer elastic pads (13); a back-shaped protective plate sleeved on the outer ring of the battery pack body (3), a plurality of inner one-way valves (6) mounted on the side wall of the back-shaped protective plate for allowing the air inside the back-shaped protective plate to flow outward unidirectionally; an outer shell (1) sleeved on the outside of the back-shaped protective plate, the bottom of the outer shell (1) is clamped with the outer wall of the mounting base (4), and a plurality of outer one-way valves (2) are mounted on the side wall of the outer shell (1) for allowing the air inside the outer shell (1) to flow outward unidirectionally; a heat dissipation air bag (12) provided with a pressing plate (14) on the top surface, the end of the pressing plate (14) away from the heat dissipation air bag (12) is placed on the bottom of the battery pack body (3), and the top of the heat dissipation air bag (12) is communicated with an exhaust pipe (10), and the output end of the exhaust pipe (10) is placed on the inside of the back-shaped protective plate.

2. A multi-layer protected lithium battery pack architecture according to claim 1, wherein: The back-shaped protective plate is composed of a plurality of transverse partitions (5) and longitudinal partitions (7) alternately spliced, the mounting base (4) is provided with a limiting groove (8) at the corresponding position of the transverse partitions (5) and the longitudinal partitions (7), and the bottom of the transverse partitions (5) and the longitudinal partitions (7) is clamped with the corresponding limiting groove (8).

3. A multi-layer protected lithium battery pack architecture according to claim 2, wherein: The two ends of the transverse partitions (5) are fixed with limiting blocks one, the two ends of the longitudinal partitions (7) are fixed with limiting blocks two, the limiting blocks one and the limiting blocks two are staggered, and the outer sides of the limiting blocks one and the limiting blocks two abut against the inner wall of the outer shell (1).

4. The multi-layer protected lithium battery pack architecture of claim 2, wherein: The inner cavity of the outer shell (1) is fixed with a buffer cotton pad, the bottom of the buffer cotton pad abuts against the top of the battery pack body (3), and the outer ring of the buffer cotton pad abuts against the inner wall of the corresponding transverse partitions (5) and longitudinal partitions (7).

5. The multi-layer protected lithium battery pack architecture of claim 1, wherein: The bottom of the heat dissipation air bag (12) is communicated with an air inlet pipe (15), the opening of the air inlet pipe (15) extends to the outside of the mounting base (4), the inner wall of the heat dissipation air bag (12) is provided with a lower one-way membrane (16) at the corresponding position of the air inlet pipe (15), the lower one-way membrane (16) is used for allowing the air to flow unidirectionally from the air inlet pipe (15) to the inner cavity of the heat dissipation air bag (12), the inner wall of the heat dissipation air bag (12) is provided with an upper one-way membrane (18) at the corresponding position of the exhaust pipe (10), and the lower one-way membrane (16) is used for allowing the air to flow unidirectionally from the inner cavity of the heat dissipation air bag (12) to the exhaust pipe (10).

6. A multi-layer protected lithium battery pack architecture according to claim 5, wherein: The two sides of the heat dissipation air bag (12) are inserted with connecting rods (11), the end of the connecting rod (11) is fixed with a locking block (9), and the end of the locking block (9) abuts against the inner wall of the outer shell (1).

7. A multi-layer protected lithium battery pack architecture according to claim 6, wherein: The inner wall of the heat dissipation air bag (12) is provided with a side one-way membrane (17) at the corresponding position of the connecting rod (11), and the side one-way membrane (17) is used for allowing the air to flow unidirectionally from the inner cavity of the heat dissipation air bag (12) to the end of the connecting rod (11).

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