Safe battery pack structure

Abstract

The utility model provides a safe battery pack structure which comprises a base, a mounting seat, a plastic plate, an insulating plate and a cover plate, a liquid collecting tank is arranged in the center of the base, a plurality of mounting holes are formed in the peripheral end surface of the liquid collecting tank, and the mounting holes are suitable for placing batteries; the mounting seat is arranged on the base, a cavity is formed in the center of the mounting seat, a plurality of battery holes are formed in the periphery of the cavity, a transmission part is mounted in the cavity, and batteries are mounted in the battery holes; the plastic plate is arranged on the battery in a sleeving mode and abuts against the mounting base, a through hole is formed in the center of the plastic plate, and the through hole abuts against the transmission piece; the insulating plate is arranged on the plastic plate; the cover plate is arranged on the insulating plate. According to the utility model, through the arrangement of the structure, the electrolyte generated by the battery can be transmitted into the liquid collecting tank, and the gas generated by the battery can be transmitted into the cavity, so that the gas and the liquid generated by the battery are discharged independently and cannot influence each other, the thermal runaway effect cannot be aggravated, and the safety of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely relates to a safe battery pack structure. BACKGROUND

[0002] With the rapid development of new energy technology, the application of various battery packs is more and more extensive, because a plurality of batteries are included in the battery pack, the battery thermal runaway is easy to cause safety hidden trouble, and then people pay more and more attention to the safe use of the battery, so how to design the battery pack structure, avoid the interaction of the flammable and explosive electrolyte and combustible gas generated after the thermal runaway of the battery cell, make the battery pack ignite and spontaneously combust, and then affect the thermal safety of the battery pack, is a problem to be solved by the person skilled in the art. SUMMARY

[0003] Therefore, the utility model wants to overcome the defect that the battery pack ignites and spontaneously combusts due to the interaction of the flammable and explosive electrolyte and combustible gas generated after the thermal runaway of the battery cell in the prior art.

[0004] Therefore, the utility model provides a safe battery pack structure, which comprises:

[0005] The base is provided with a liquid collecting groove in the center, a plurality of mounting holes are arranged on the peripheral end face of the liquid collecting groove, and the mounting holes are suitable for placing batteries;

[0006] The mounting seat is arranged on the base, the mounting seat is provided with a cavity in the center, a plurality of battery holes are arranged around the cavity, a transmission member is arranged in the cavity, and a battery is arranged in the battery hole;

[0007] The plastic plate is sleeved on the battery and abuts against the mounting seat, the plastic plate is provided with a through hole in the center, and the through hole abuts against the transmission member.

[0008] Optionally, a first flow channel is arranged on the plastic plate, and the first flow channel is connected with the transmission member.

[0009] Optionally, the cross section of the transmission member is in the shape of a hollow annular ring, the transmission member is provided with a second flow channel in the axial direction, one end of the second flow channel is communicated with the first flow channel, the other end of the second flow channel is communicated with the liquid collecting groove, and the liquid collecting groove is suitable for storing the electrolyte generated by the battery.

[0010] Optionally, a plurality of first exhaust holes are arranged on the circumferential wall surface of the transmission member, the first exhaust holes are communicated with the cavity, the first exhaust holes and the second flow channel do not coincide with each other, and the first exhaust holes are suitable for discharging the gas generated by the battery or diffusing heat to the cavity.

[0011] Optionally, the safe battery pack structure further comprises an insulating plate and a cover plate, the insulating plate is arranged on the plastic plate, and the cover plate is arranged on the insulating plate, and the cover plate is provided with a second exhaust hole in the center, and the second exhaust hole is suitable for exhausting the gas in the cavity.

[0012] Optionally, a gap is arranged between the battery and the battery hole, and the gap is suitable for exhausting the gas generated by the battery into the cavity.

[0013] Optionally, two adjacent batteries are connected through a palladium sheet, the palladium sheet is suitable for connecting the positive electrode of one battery and the negative electrode of another battery, the palladium sheet is in a stepped shape, and the palladium sheet is provided with a height difference with the end face of the plastic plate.

[0014] Optionally, an explosion-proof valve is further arranged on the battery, and the explosion-proof valve is suitable for avoiding explosion of the battery.

[0015] The technical scheme of the utility model has the following advantages:

[0016] 1. The utility model provides a safe battery pack structure, including base, mounting seat, plastic plate, insulating plate and cover plate, the base center is provided with the collecting groove, the collecting groove periphery end face is provided with a plurality of mounting holes, the mounting hole is suitable for placing battery, the mounting seat sets up on the base, the mounting seat center is provided with the cavity, the cavity around is provided with a plurality of battery holes, the cavity installs transmission spare, the battery hole installs battery, the plastic plate sets up in the battery, and with the mounting seat abuts, the plastic plate center is provided with the through -hole, the through -hole with transmission spare abuts.

[0017] The existing battery pack structure is prone to thermal runaway, when thermal runaway occurs, the flammable and explosive electrolyte and combustible gas generated by the battery are prone to interact, making the battery pack fire burn more fiercely, affecting the use of the battery pack. In the embodiment of the utility model, by arranging the transmission part, the electrolyte generated by the battery can be transmitted into the collecting groove, at the same time, the gas generated by the battery can be transmitted into the cavity, and then the gas can be discharged to the outside through the insulating plate and the cover plate. In addition, the heat generated by the battery can be transmitted into the cavity more quickly through the transmission part, so that the heat generated by the battery can be diffused more quickly, thereby avoiding thermal runaway and improving the thermal safety of the battery pack.

[0018] 2. The utility model provides a safe battery pack structure, the plastic plate is provided with first runner, first runner with second runner intercommunication. In the embodiment of the utility model, by arranging the first runner on the plastic plate, the electrolyte sprayed by the battery can flow into the collecting groove through the first runner, thereby improving the discharge efficiency of the electrolyte and improving the safety of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 It is a schematic diagram of the overall explosion structure of the present application.

[0021] Figure 2 It is a schematic diagram of the plastic plate structure of the present application.

[0022] Figure 3 It is a schematic diagram of the transmission structure of the present application.

[0023] Figure 4 It is a schematic diagram of the base structure of the present application.

[0024] In the embodiments, the reference signs are explained as follows:

[0025] 1, base; 2, mounting seat; 3, plastic plate; 4, insulating plate; 5, cover plate; 6, transmission; 7, battery; 8, palladium sheet; 9, explosion-proof valve;

[0026] 11, liquid collecting groove;

[0027] 21, cavity; 22, battery hole;

[0028] 31, first flow channel;

[0029] 51, second exhaust hole;

[0030] 61, second flow channel; 62, first exhaust hole. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the restriction of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the restriction of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0035] Embodiment

[0036] As Figures 1 to 4 shown, the utility model provides a safe battery pack structure, including base 1, mounting seat 2, plastic plate 3, insulating plate 4 and cover plate 5, the base 1 center is provided with liquid collecting groove 11, the periphery end surface of liquid collecting groove 11 is provided with a plurality of mounting holes, the mounting hole is suitable for placing battery 7;The mounting seat 2 is arranged on the base 1, the mounting seat 2 center is provided with cavity 21, a plurality of battery holes 22 are provided around the cavity 21, the transmission part 6 is installed in the cavity 21, and the battery 7 is installed in the battery hole 22;The plastic plate 3 is sleeved on the battery 7, and abuts with the mounting seat 2, the plastic plate 3 center is provided with through hole, and the through hole abuts with the transmission part 6.

[0037] In the utility model embodiment, first, the mounting seat 2 is installed on the base 1, then the battery 7 is inserted into the battery hole 22, then the plastic plate 3 is installed on the battery 7, and then the insulating plate 4 and the cover plate 5 are sequentially installed on the plastic plate 3, when the battery 7 is abnormal, electrolyte and combustible gas will be generated, the electrolyte flows into the liquid collecting groove 11 through the transmission part 6, and the combustible gas enters the cavity 21 through the transmission part 6, and then is discharged to the outside through the cover plate 5.

[0038] Existing battery pack structures are prone to thermal runaway. When thermal runaway occurs, the flammable and explosive electrolyte and combustible gas produced by the battery can easily interact, causing the battery pack to catch fire more violently and affecting its usability. In this invention, by setting the transmission component 6, the electrolyte produced by the battery can be transferred to the collection tank 11, and the gas produced by the battery can be transferred to the cavity 21 and then discharged to the outside. In addition, the transmission component 6 can also transfer the heat generated by the battery to the cavity 21 more quickly, separating the transmission paths of combustible gas and combustible electrolyte, allowing the heat generated by the battery to dissipate more quickly, thereby reducing the risk of thermal runaway and improving the thermal safety of the battery pack.

[0039] In this embodiment of the utility model, the mounting base 2 is cylindrical, and a circular cavity 21 is provided in the center of the cylindrical mounting base 2. The transmission component 6 is installed in the circular cavity 21. The transmission component 6 enables the combustible gas and combustible electrolyte generated by the battery 7 to be separated into gas and liquid and discharged along different paths without affecting each other, thereby avoiding further aggravation of thermal runaway effect and improving the safety of the battery pack.

[0040] Furthermore, such as Figure 2 As shown, a first flow channel 31 is provided on the plastic sheet 3, and the first flow channel 31 is connected to the transmission member 6. In this embodiment of the present invention, the arrangement of the first flow channel 31 is irregularly curved. Of course, it can also be set as a straight line. This embodiment does not limit the arrangement of the first flow channel 31. Those skilled in the art can modify the arrangement of the first flow channel 31 according to the actual situation, as long as the same technical effect can be achieved.

[0041] Furthermore, such as Figure 3 As shown, the cross-section of the transmission component 6 is a hollow annular shape. The upper end of the transmission component 6 abuts against the plastic plate 3, and the lower end of the transmission component 6 abuts against the base 1. The transmission component 6 has a second flow channel 61 arranged axially. One end of the second flow channel 61 is connected to the first flow channel 31, and the other end of the second flow channel 61 is connected to the liquid collection tank 11. The liquid collection tank 11 is suitable for storing the electrolyte generated by the battery 7. When the battery 7 experiences thermal runaway, the battery 7 sprays electrolyte onto the plastic plate 3. The electrolyte enters the second flow channel 61 through the first flow channel 31, and then passes through the second flow channel 61 into the liquid collection tank 11 for storage, preventing the electrolyte from accumulating in the battery pack and causing combustion.

[0042] In the embodiment of the utility model, the liquid collecting groove 11 is provided with adsorbing resin, adsorbing foam and other substances, electrolyte is adsorbed and treated by the adsorbing substances, and combustible gas generated by the evaporation of electrolyte is avoided. In addition, a plurality of battery cell positions are further provided on the base 1, the battery cell positions correspond to the battery holes 22 one by one, and are suitable for placing the batteries 7.

[0043] Further, the transmission member 6 is provided with a plurality of first exhaust holes 62 on the circumferential wall surface, the first exhaust holes 62 are communicated with the cavity 21, the first exhaust holes 62 are not coincided with the second flow channel 61, and the first exhaust holes 62 are suitable for exhausting the gas generated by the batteries 7 or diffusing heat into the cavity 21. When the thermal runaway effect occurs in the batteries 7, the gas generated by the batteries 7 flows into the cavity 21 through the first exhaust holes 62 and is then exhausted to the outside from the cavity 21. In addition, the batteries 7 also generate a large amount of heat, the first exhaust holes 62 can dissipate the heat into the cavity 21, and then the heat is diffused through the axial direction, thereby reducing the heat accumulation of the battery pack and preventing the batteries 7 from burning, and the safety of the battery pack is improved.

[0044] Further, the safety battery pack structure further comprises an insulating plate 4 and a cover plate 5, the insulating plate 4 is arranged on the plastic plate 3, and the cover plate 5 is arranged on the insulating plate 4. The cover plate 5 is provided with a second exhaust hole 51 in the center, and the second exhaust hole 51 is suitable for exhausting the gas in the cavity 21. In the embodiment of the utility model, the second exhaust hole 51 is circumscribed by an air extraction device, and the air extraction device can be an air extraction fan to accelerate the discharge of combustible gas. When the cavity 21 contains combustible gas and a large amount of heat, the combustible gas and the large amount of heat are exhausted through the second exhaust hole 51 by the air extraction device, and the discharge efficiency of the combustible gas and the heat is improved.

[0045] Further, a gap is arranged between the batteries 7 and the battery holes 22, the gap is suitable for installing the batteries 7 into the battery holes 22 and discharging the generated gas into the cavity 21, and in addition, a gap is also arranged between adjacent batteries 7, and the gap can discharge the gas and heat generated by the batteries 7 into the cavity 21. By arranging the gap between the batteries 7 and the battery holes 22 and the gap between adjacent batteries 7, the gas generated by the batteries 7 can flow quickly into the cavity 21, and then is exhausted through the second exhaust hole 51, and the discharge efficiency of the gas is improved.

[0046] Further, two adjacent batteries 7 are connected by a palladium sheet 8, which is suitable for connecting the positive electrode of one battery 7 and the negative electrode of another battery 7, the palladium sheet 8 is stepped, and the palladium sheet 8 is provided with a height difference with the end face of the plastic plate 3. In addition, the plastic plate 3 is also integrated with a compact cooling system, which can cool the battery pack.

[0047] Further, the battery 7 is also provided with an explosion-proof valve 9, which is suitable for avoiding explosion of the battery 7. When the battery pack appears thermal runaway, the internal air pressure rises sharply, and the explosion-proof valve 9 can timely release pressure to prevent the battery 7 from exploding.

[0048] The specific working process of the safety battery pack structure provided by the utility model is as follows:

[0049] First, the mounting seat 2 is installed on the base 1, then the battery 7 is inserted into the battery hole 22, then the plastic plate 3 is installed on the battery 7, then the palladium sheet 8 is used to connect two adjacent batteries 7, and then the insulating plate 4 and the cover plate 5 are sequentially installed on the plastic plate 3. When the battery 7 appears thermal runaway, the battery 7 will spray electrolyte and produce combustible gas, the electrolyte is sprayed onto the first flow channel 31 of the plastic plate 3, the electrolyte in the first flow channel 31 enters the liquid collecting groove 11 through the second flow channel 61 and is adsorbed by the adsorbent, and the produced combustible gas enters the cavity 21 through the first exhaust hole 62 and then enters the air extraction device through the second exhaust hole 51. The discharge of electrolyte and combustible gas is independent of each other and will not affect each other, so as to not aggravate the thermal runaway effect. In addition, the battery 7 will also produce a large amount of heat, the heat is diffused into the cavity 21 through the first exhaust hole 62 and then is axially discharged through the second exhaust hole 51, thereby reducing the heat accumulation of the battery pack and improving the safety of the battery pack.

[0050] Obviously, the above embodiments are only examples for clearly illustrating, and not limiting the embodiments. For those skilled in the art, other different forms of changes or modifications can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or modifications derived therefrom are still within the protection scope of the utility model.

Claims

1. A safety battery pack structure, characterized by, The utility model relates to a battery pack, including: Base (1), the center is provided with the sump (11), the sump (11) is provided with a plurality of mounting holes on the periphery end surface, the mounting hole is suitable for placing battery (7); Mounting seat (2) is arranged on the base (1), the mounting seat (2) is provided with cavity (21) in the center, and a plurality of battery holes (22) are arranged around the cavity (21), the transmission part (6) is installed in the cavity (21), and the battery (7) is installed in the battery hole (22); Plastic plate (3) is sleeved on the battery (7), and the plastic plate (3) is in abutment with the mounting seat (2), the plastic plate (3) is provided with a through hole in the center, and the through hole is in abutment with the transmission part (6).

2. The safe battery pack structure according to claim 1, wherein, The plastic plate (3) is provided with a first flow channel (31), and the first flow channel (31) is connected with the transmission part (6).

3. The safety battery pack structure according to claim 2, wherein The cross section of the transmission part (6) is hollow annular, the transmission part (6) is provided with a second flow channel (61) in the axial direction, one end of the second flow channel (61) is communicated with the first flow channel (31), the other end of the second flow channel (61) is communicated with the sump (11), and the sump (11) is suitable for storing electrolyte generated by the battery (7).

4. The safety battery pack structure according to claim 3, wherein A plurality of first exhaust holes (62) are arranged on the circumferential wall surface of the transmission part (6), the first exhaust holes (62) are communicated with the cavity (21), the first exhaust holes (62) and the second flow channel (61) do not coincide with each other, and the first exhaust holes (62) are suitable for exhausting gas generated by the battery (7) or diffusing heat into the cavity (21).

5. The safety battery pack structure according to any one of claims 1 to 4, wherein Further including: Insulating plate (4) is arranged on the plastic plate (3); Cover plate (5) is arranged on the insulating plate (4), and the cover plate (5) is provided with a second exhaust hole (51) in the center, and the second exhaust hole (51) is suitable for exhausting gas in the cavity (21).

6. The safety battery pack structure according to claim 5, wherein The battery (7) and the battery hole (22) are provided with a gap, and the adjacent batteries (7) are also provided with a gap, and the gap is suitable for discharging the gas and heat generated by the battery (7) into the cavity (21).

7. The safety battery pack structure according to claim 6, wherein Two adjacent batteries (7) are connected by palladium sheet (8), the palladium sheet (8) is suitable for connecting the positive electrode of one battery (7) and the negative electrode of another battery (7), the palladium sheet (8) is in the form of ladder, and the palladium sheet (8) is provided with a height difference with the end surface of the plastic plate (3).

8. The safety battery pack structure according to claim 7, wherein The battery (7) is also provided with an explosion-proof valve (9), and the explosion-proof valve (9) is suitable for avoiding explosion of the battery (7).

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