Integrated battery pack box structure with composite heat absorption and cooling functions

Abstract

The utility model belongs to the technical field of lithium battery energy storage, and particularly relates to a composite heat absorption and cooling integrated battery pack box structure which comprises a battery bracket, a battery pack box and a partition plate, according to the height of the battery bracket, a plurality of mounting plates are symmetrically arranged among the left side plate, the right side plate and the middle partition plate, and the height between the mounting plates is set according to the size of the battery pack box; the battery box is a semi-enclosed structure cavity formed by a battery box shell and a battery box cover, and a mounting edge is arranged along the edge of the battery box shell; a bracket is arranged on the battery box cover at the top in the battery box cavity and is locked and fixed with the battery box cover through a screw b; a composite cooling and fire extinguishing material is arranged in the bracket; a plurality of overflow holes are formed in the two side surfaces of the battery box shell, so that the composite cooling fire-extinguishing material flows out from the overflow holes to take away part of heat; and the battery pack boxes are arranged on the mounting plates on each layer of the battery bracket. Heat can be absorbed in time, local heat accumulation is prevented, and fireproof protection is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery energy storage, and specifically relates to an integrated battery pack box structure with composite heat absorption and temperature reduction. Background Art

[0002] The rapid heat accumulation and fire prevention issues of batteries in lithium battery energy storage cabinets and energy storage containers have always restricted the large-scale use of energy storage.

[0003] A large number of lithium-ion batteries are connected in series or in parallel in lithium battery energy storage cabinets and energy storage containers. Due to the physical properties of lithium ions, the dendritic lithium metal formed when lithium ions are reduced during the charging process of lithium batteries can pierce the diaphragm if processed and used improperly, causing the risk of short circuit and spontaneous combustion. Therefore, there is no absolutely safe battery in various complex working conditions.

[0004] The general process of a fire is that a single battery or module experiences thermal runaway, igniting the entire battery pack box. The thermal runaway fire in the battery pack box causes the entire cluster of battery boxes to burn, and then causes the entire cabinet to burn.

[0005] The existing battery management system uses the battery management system to measure the parameters of daily battery operation and maintenance, warns of thermal runaway at an early stage, and prevents and controls fires through early warning of thermal runaway and fire-fighting equipment. It uses fire-extinguishing agent / water as a medium to spray the entire battery cluster and power storage cabinet / container to cool down and extinguish the fire. Its disadvantages are insufficient heat absorption and untimely prevention and control; the heat in the battery is not easy to absorb and reduce; and a chain reaction of battery combustion is prone to occur. Utility Model Content

[0006] The utility model provides an integrated battery pack box structure with composite heat absorption and cooling, and the specific technical scheme is as follows:

[0007] An integrated battery pack box structure with composite heat absorption and cooling, comprising a battery bracket, a battery pack box and a partition;

[0008] The battery bracket comprises a frame, a left side plate, a right side plate, a rear side plate, a middle partition plate and a mounting member, wherein the left side plate, the right side plate and the rear side plate are respectively fixed to the left side, the right side and the rear side of the frame; a middle partition plate is provided between the left side plate and the right side plate, and the middle partition plate divides the box into two cavities;

[0009] According to the height of the battery bracket, a plurality of mounting plates are symmetrically arranged between the left plate, the right plate and the middle partition plate, and the height between the mounting plates is set according to the size of the battery pack box;

[0010] A hook is provided on the rear side of the frame at the top end of the battery bracket;

[0011] The battery pack box includes a battery connecting wire plate, a battery box, a battery, a fan and a handle;

[0012] The battery box is formed of a semi-enclosed structural cavity by a battery box shell and a battery box cover, and a mounting edge is provided along the edge of the battery box shell;

[0013] A bracket is provided on the battery box cover at the top of the battery box cavity, and is locked and fixed to the battery box cover by screws b;

[0014] The bracket is provided with a composite cooling and fire extinguishing material;

[0015] The battery is placed in the battery box and connected to the battery connecting wire board;

[0016] The battery box shell is provided with a plurality of overflow holes on both sides thereof, so that the composite cooling and fire extinguishing material can flow out from the overflow holes and take away some heat;

[0017] A fan and a handle are provided on the top of the battery box shell;

[0018] The battery pack box is arranged on the mounting plate of each layer of the battery bracket, and the battery pack box is fixed on the battery bracket by screws passing through the mounting edge of the battery pack box.

[0019] The preferred embodiment of the composite heat-absorbing and cooling integrated battery pack box structure is that 12 sets of the battery pack boxes form a battery cluster.

[0020] The composite heat-absorbing and cooling integrated battery pack box structure, the preferred embodiment of which is that the composite cooling and fire-extinguishing material consists of two layers, namely, a composite cooling and fire-extinguishing material layer a and a composite cooling and fire-extinguishing material layer b;

[0021] Preparation of the first layer of composite cooling fire extinguishing material: Na2CO3 with a particle size of 200 mesh and clay powder with a particle size of 100 mesh are screened, and Na2CO3 powder and clay powder are mixed in a mass ratio of 6.5:3.5. The mixed materials are pressed into shape using a perforated mold and a press. The pressure of the press is set to 5MPa, and then the pressed part is placed in a heating furnace for heating at a heating temperature of 980°C to form a composite cooling fire extinguishing material layer a;

[0022] Preparation of the second layer of composite cooling fire extinguishing material: Mix 7% alumina powder, 60% quartz powder, 0.02% iron oxide powder, 10% quicklime powder, and 23% boron oxide powder, heat the mixed raw materials to 1100°C in a square mold, heat for 2 hours, air cool and keep warm for 30 minutes to form a composite cooling fire extinguishing material layer b.

[0023] The composite heat-absorbing and cooling integrated battery pack box structure, its preferred embodiment is that the composite cooling and fire-extinguishing material layer a is in the shape of a plate, and through holes are symmetrically distributed on the plate surface; the composite cooling and fire-extinguishing material layer b is in the shape of a plate, and circular protrusions are symmetrically distributed on the plate surface, and installation openings are provided on both sides of the protrusions; the composite cooling and fire-extinguishing material layer a is arranged in the installation opening of the composite cooling and fire-extinguishing material layer b.

[0024] The preferred embodiment of the composite heat-absorbing and cooling integrated battery pack box structure is that the thickness of the composite cooling and fire-extinguishing material in the bracket is 49 mm.

[0025] The working principle of an integrated battery pack box structure with composite heat absorption and cooling: the ignition temperature of lithium battery is 300℃, and the combustion temperature is 500℃-800℃. The composite cooling and fire extinguishing material fixedly installed on the top of the battery box is a flame-retardant material. The material is divided into two layers of composite. When the battery temperature rises to 300℃, the composite cooling and fire extinguishing material layer a falls off from the top, covers the battery, and absorbs the heat of the battery; when the battery temperature reaches 500℃, the composite cooling and fire extinguishing material layer b begins to absorb a large amount of heat and becomes liquid, flowing down from the top to completely cover the top of the battery, absorbing a large amount of battery heat, preventing the flame from transmitting to the upper battery box, and the composite cooling and fire extinguishing material layer b flows out from the overflow hole, taking out part of the heat. Remove the battery pack box with a quick connection device under safe conditions to gain time for later fire rescue and protect the surrounding battery boxes to the maximum extent.

[0026] Beneficial Effects

[0027] The technical aspects of this utility model change the safety of the existing battery cluster. The composite material is used in the battery pack box as a cooling heat absorber and fire protection for the battery. The added composite material has a greater heat absorption capacity than the existing fire retardants, such as heptafluoropropane, perfluorohexanone, water mist, etc. The heat absorption capacity of the composite material is 5 times that of water; it can absorb heat in time to prevent local heat accumulation and fire protection, and quickly take away the heat in the battery through the drain port; it can accurately and effectively react to deal with the failed battery; it can be used when there is a fault in the external water and electricity and the alarm system fails; it can be used in conjunction with the external alarm system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front view of an integrated battery pack box structure with composite heat absorption and cooling;

[0029] Figure 2 A side view of an integrated battery pack box structure with composite heat absorption and cooling;

[0030] Figure 3 A top view of an integrated battery pack box structure with composite heat absorption and cooling;

[0031] Figure 4 This is the main view of the battery pack box;

[0032] Figure 5 This is a side view of the battery pack box;

[0033] Figure 6 This is a top view of the battery pack box;

[0034] Figure 7 for Figure 6 Schematic diagram of the structure of composite cooling and fire extinguishing materials installed in a AA cross-section battery pack box;

[0035] Figure 8 It is the main view of the composite cooling fire extinguishing material a;

[0036] Fig. 9 It is a top view of the composite cooling fire extinguishing material a;

[0037] Fig.10 This is the main view of the composite cooling and fire extinguishing material b;

[0038] Fig.11 It is a top view of composite cooling fire extinguishing material b.

[0039] Figure 1 Middle: 1-battery bracket, 2-battery pack box, 3-middle partition, 4-skeleton, 5-left side plate, 6-right side plate, 7-rear side plate, 8-mounting part, 9-mounting plate, 10-battery connecting wire plate, 11-battery box, 12-battery, 13-fan, 14-handle, 15-battery box shell, 16-battery box cover, 17-mounting edge, 18-bracket, 19-screw b, 20-overflow hole, 21-screw a, 22-composite cooling and fire extinguishing material layer a, 23 composite cooling and fire extinguishing material layer b, 24-through hole, 25-protrusion, 26-mounting port. DETAILED DESCRIPTION

[0040] The utility model is further described below in conjunction with the drawings in the utility model, but it should not be understood that the above-mentioned subject scope of the utility model is limited to the following embodiments. Without departing from the above-mentioned ideas of the utility model, various substitutions and changes are made according to the common technical knowledge and customary means in the field, which should be included in the protection scope of the utility model.

[0041] An integrated battery pack box structure with composite heat absorption and cooling, comprising a battery bracket 1, a battery pack box 2 and a middle partition 3;

[0042] The battery holder 1 comprises a frame 4, a left side plate 5, a right side plate 6, a rear side plate 7, a middle partition plate 3 and a mounting member 8. The left side plate 5, the right side plate 6 and the rear side plate 7 are respectively fixed on the left side, the right side and the rear side of the frame 4; a middle partition plate 3 is arranged between the left side plate 5 and the right side plate 6, and the middle partition plate 3 divides the box into two cavities;

[0043] According to the height of the battery bracket 1, a plurality of mounting plates 9 are symmetrically arranged between the left side plate 5, the right side plate 6 and the middle partition plate 3, and the height between the mounting plates is set according to the size of the battery pack box;

[0044] A hook 8 is provided on the rear side of the frame at the top of the battery holder 1;

[0045] The battery pack box 2 includes a battery connecting line plate 10, a battery box 11, a battery 12, a fan 13 and a handle 14;

[0046] The battery box 11 is formed of a battery box shell 15 and a battery box cover 16 to form a semi-enclosed structure cavity, and a mounting edge 17 is provided along the edge of the battery box shell 15;

[0047] A bracket 18 is provided on the battery box cover 16 at the top of the battery box 11 cavity, and is locked and fixed to the battery box cover 16 by screws b19;

[0048] The bracket 18 is provided with a composite cooling and fire extinguishing material;

[0049] The battery 12 is placed in the battery box 11 and connected to the battery connecting line board 10;

[0050] The battery box housing 15 is provided with a plurality of overflow holes 20 on both sides, for the composite cooling and fire extinguishing material to flow out from the overflow holes 20 and take away some heat;

[0051] The top of the battery box housing 15 is provided with a fan 13 and a handle 14;

[0052] The battery pack box 2 is arranged on the mounting plate 9 of each layer of the battery holder 1, and the battery pack box 2 is fixed to the battery holder 1 by screws a21 passing through the mounting edge 17 of the battery pack box 2.

[0053] Twelve sets of the battery pack boxes 2 form a battery cluster.

[0054] The composite cooling fire extinguishing material is composed of two layers, namely, a composite cooling fire extinguishing material layer a22 and a composite cooling fire extinguishing material layer b23;

[0055] Preparation of the first layer of composite cooling fire extinguishing material: Na2CO3 with a particle size of 200 mesh and clay powder with a particle size of 100 mesh are screened, and the Na2CO3 powder and clay powder are mixed in a mass ratio of 6.5:3.5. The mixed materials are pressed into shape using a perforated mold and a press. The pressure of the press is set to 5MPa, and then the pressed part is placed in a heating furnace for heating at a heating temperature of 980°C to form a composite cooling fire extinguishing material layer a22;

[0056] Preparation of the second layer of composite cooling fire extinguishing material: Mix 7% alumina powder, 60% quartz powder, 0.02% iron oxide powder, 10% quicklime powder and 23% boron oxide powder, heat the mixed raw materials to 1100°C in a square mold, heat for 2 hours, air cool and keep warm for 30 minutes to form a composite cooling fire extinguishing material layer b23.

[0057] The composite cooling fire extinguishing material layer a22 is in a plate shape, and through holes 24 are symmetrically distributed on the plate surface; the composite cooling fire extinguishing material layer b23 is in a plate shape, and circular protrusions 25 are symmetrically distributed on the plate surface, and installation openings 26 are provided on both sides of the protrusions 25; the composite cooling fire extinguishing material layer a22 is arranged in the installation opening 26 of the composite cooling fire extinguishing material layer b23.

[0058] The thickness of the composite cooling and fire extinguishing material in the bracket 18 is 49 mm.

[0059] The working principle of an integrated battery pack box structure with composite heat absorption and cooling: the ignition temperature of lithium battery is 300℃, and the combustion temperature is 500℃-800℃. The composite cooling and fire extinguishing material fixedly installed on the top of the battery box is a flame-retardant material. The material is divided into two layers of composite. When the battery temperature rises to 300℃, the composite cooling and fire extinguishing material layer a22 falls off from the top, covers the battery, and absorbs the heat of the battery; when the battery temperature reaches 500℃, the composite cooling and fire extinguishing material layer b23 begins to absorb a large amount of heat and becomes liquid, flowing down from the top to completely cover the top of the battery, absorbing a large amount of battery heat, and preventing the flame from transmitting to the upper battery box. The composite cooling and fire extinguishing material layer b23 flows out from the overflow hole 20, taking out part of the heat. Remove the battery pack box 2 with a quick connection device under safe conditions to gain time for later fire rescue and protect the surrounding battery boxes to the maximum extent.

Claims

1. An integrated battery pack box structure with composite heat absorption and cooling, characterized in that: Including battery bracket, battery pack box and partition; The battery bracket comprises a frame, a left side plate, a right side plate, a rear side plate, a middle partition plate and a mounting member, wherein the left side plate, the right side plate and the rear side plate are respectively fixed to the left side, the right side and the rear side of the frame; a middle partition plate is provided between the left side plate and the right side plate, and the middle partition plate divides the box into two cavities; According to the height of the battery bracket, a plurality of mounting plates are symmetrically arranged between the left plate, the right plate and the middle partition plate, and the height between the mounting plates is set according to the size of the battery pack box; A hook is provided on the rear side of the frame at the top end of the battery bracket; The battery pack box includes a battery connecting wire plate, a battery box, a battery, a fan and a handle; The battery box is formed of a semi-enclosed structural cavity by a battery box shell and a battery box cover, and a mounting edge is provided along the edge of the battery box shell; A bracket is provided on the battery box cover at the top of the battery box cavity, and is locked and fixed to the battery box cover by screws b; The bracket is provided with a composite cooling and fire extinguishing material; The battery is placed in the battery box and connected to the battery connecting wire board; The battery box shell is provided with a plurality of overflow holes on both sides thereof, so that the composite cooling and fire extinguishing material can flow out from the overflow holes and take away some heat; A fan and a handle are provided on the top of the battery box shell; The battery pack box is arranged on the mounting plate of each layer of the battery bracket, and the battery pack box is fixed on the battery bracket by screws passing through the mounting edge of the battery pack box.

2. The integrated battery pack structure with composite heat absorption and cooling according to claim 1 is characterized in that: Twelve sets of the battery pack boxes constitute a battery cluster.

3. The integrated battery pack structure with composite heat absorption and cooling according to claim 1 is characterized in that: The composite cooling fire extinguishing material consists of two layers, namely, a composite cooling fire extinguishing material layer a and a composite cooling fire extinguishing material layer b.

4. The integrated battery pack structure with composite heat absorption and cooling according to claim 1 is characterized in that: The composite cooling fire extinguishing material layer a is in the shape of a plate, and through holes are symmetrically distributed on the plate surface; the composite cooling fire extinguishing material layer b is in the shape of a plate, and circular protrusions are symmetrically distributed on the plate surface, and installation openings are provided on both sides of the protrusions; the composite cooling fire extinguishing material layer a is arranged in the installation opening of the composite cooling fire extinguishing material layer b.

5. The integrated battery pack structure with composite heat absorption and cooling according to claim 1 is characterized in that: The thickness of the composite cooling and fire-extinguishing material in the bracket is 49 mm.

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