A protective structure for lithium batteries in new energy vehicles

Abstract

This utility model discloses a protective structure for lithium batteries in new energy vehicles, comprising: a protective shell, a protective base plate, and at least two water tanks. The protective shell includes an outer shell, a heat-conducting base plate, and multiple spacer plates. The spacer plates are disposed inside the outer shell, forming multiple lithium battery storage spaces within the shell. The heat-conducting base plate is connected to the bottom of the outer shell and covers the bottom of each storage space. The protective base plate is installed at the bottom of the outer shell, located below the heat-conducting base plate, and spaced apart from the heat-conducting base plate to form a coolant containment cavity. A sliding partition plate is provided within the coolant containment cavity, dividing it into a first cooling space and a second cooling space that are isolated from each other. The sliding partition plate is slidably connected to the shell to adjust the volume of the first cooling space and the second cooling space. Each water tank is connected to the first cooling space and the second cooling space via a water pump. It exhibits good protective and heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery protection technology, and in particular to a protection structure for lithium batteries in new energy vehicles. Background Technology

[0002] Lithium-ion battery packs are a core component of new energy vehicles. They are mainly divided into ternary lithium batteries and lithium iron phosphate batteries, characterized by high energy density and long cycle life. Their core components include the battery cell, battery management system (BMS), and protective structure. The BMS monitors temperature and voltage in real time to ensure safe charging and discharging. Currently, they dominate the market, but challenges such as safety and low-temperature degradation still need to be addressed.

[0003] In recent years, the development of new energy vehicles has become increasingly mature. As a core component of new energy vehicles, the safety of automotive lithium batteries has attracted increasing attention, especially given the current problems of poor protection and heat dissipation in the protective structure of new energy vehicle lithium batteries. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a protective structure for lithium batteries in new energy vehicles, which has good protective and heat dissipation performance.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A protective structure for lithium batteries in new energy vehicles includes: a protective shell, a protective base plate, and at least two water tanks;

[0007] The protective shell includes an outer shell, a heat-conducting base plate, and multiple spacer plates. The multiple spacer plates are disposed inside the outer shell, forming multiple lithium battery storage spaces inside the outer shell. The heat-conducting base plate is connected to the bottom of the outer shell and covers the bottom of each storage space.

[0008] The protective base plate is installed at the bottom of the outer shell and is located below the heat-conducting base plate. It is spaced apart from the heat-conducting base plate to form a coolant accommodating cavity. A sliding partition plate is provided in the coolant accommodating cavity. The sliding partition plate divides the coolant accommodating cavity into a first cooling space and a second cooling space that are isolated from each other. The sliding partition plate is slidably connected to the outer shell to adjust the volume of the first cooling space and the volume of the second cooling space.

[0009] At least two water storage tanks, each of which is connected to the first cooling space and the second cooling space via a water pump.

[0010] Furthermore, the protective base plate is provided with a guide rail, and the sliding partition plate slides in cooperation with the guide rail via a slider.

[0011] Furthermore, the protective base plate is made of stainless steel.

[0012] Furthermore, a dustproof net is provided on the side wall of the protective shell, and the dustproof net connects the lithium battery storage space with the external environment.

[0013] Furthermore, the protective shell has a horizontal mounting hole, and the dustproof net is installed in the horizontal mounting hole.

[0014] Furthermore, the new energy vehicle lithium battery protection structure also includes a control system, which is electrically connected to the water pump.

[0015] Furthermore, both the first cooling space and the second cooling space are connected to temperature sensors, and each of the temperature sensors and the water pump is electrically connected to the control system.

[0016] Furthermore, at least one side wall of the lithium battery holding space is provided with a plurality of first support pads, which are used to abut against the lithium battery.

[0017] Furthermore, each side wall of the lithium battery holding space is provided with the first support pad.

[0018] Furthermore, a ventilation hole is provided at the bottom of the spacer plate, and the ventilation hole connects to two adjacent lithium battery holding spaces.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. Based on the thermally conductive base plate connected to the bottom of the outer shell and covering the bottom of each holding space, on the one hand, when the lithium battery is placed in the holding space, the thermally conductive base plate can provide support for the lithium battery; on the other hand, when the lithium battery generates heat during operation, the thermally conductive base plate can conduct the heat out, thereby dissipating heat from the lithium battery and increasing heat dissipation efficiency.

[0021] 2. The protective base plate is installed at the bottom of the casing and below the heat-conducting base plate, and is spaced apart from the heat-conducting base plate to form a coolant containment cavity. On the one hand, the protective base plate can block flying stones or other splashes when the car is in motion, thus protecting the lithium battery; on the other hand, the coolant contained in the coolant containment cavity can absorb the large amount of heat generated by the lithium battery during operation, thereby increasing heat dissipation efficiency and improving the service life of the lithium battery.

[0022] 3. The cooling cavity is divided into a first cooling space and a second cooling space by a sliding partition plate installed in the cooling cavity. The first cooling space and the second cooling space are respectively connected to each water tank by a pump. When heat dissipation is performed, one of the two cooling spaces, for example the first cooling space, first draws coolant from the water tank into it through the pump. When the temperature of the coolant in the first cooling space rises and the heat dissipation efficiency decreases, the pump draws the coolant from the first cooling space back to the connected water tank. At the same time, the water tank connected to the second cooling space sends coolant into the second cooling space through the pump, thereby completing the alternating heat dissipation of the coolant in the two cooling spaces and improving the heat dissipation efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first embodiment of a protective structure for lithium batteries in new energy vehicles according to the present invention;

[0024] Figure 2 This is a schematic diagram of the first embodiment of a protective structure for lithium batteries in new energy vehicles according to the present invention;

[0025] Figure 3 This is a schematic diagram of the dustproof netting of the first embodiment of the protective structure for lithium batteries in new energy vehicles according to this utility model;

[0026] Figure 4 This is a partially enlarged structural diagram of the dustproof netting in the first embodiment of the protective structure for lithium batteries in new energy vehicles according to this utility model.

[0027] In the diagram: 1. Outer shell; 2. Heat-conducting base plate; 3. Spare plate; 4. Protective base plate; 5. Coolant containment chamber; 6. Sliding partition plate; 7. First cooling space; 8. Second cooling space; 9. Water tank; 10. Guide rail; 11. Dustproof net; 12. Support pad; 13. Ventilation hole. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] First embodiment:

[0032] See Figures 1-3 A preferred embodiment of the present invention provides a protective structure for lithium batteries in new energy vehicles, comprising: a protective shell, a protective base plate 4, and at least two water tanks 9.

[0033] The protective casing includes an outer shell 1, a heat-conducting base plate 2, and multiple spacers 3. The spacers 3 are located inside the outer shell 1, forming multiple lithium battery storage spaces inside the outer shell 1. Obviously, the number of spacers 3 depends on the number of lithium batteries to be placed. If only one lithium battery needs to be placed, then there is no need to use spacers 3 to divide the interior of the outer shell 1 into lithium battery storage spaces. If two lithium batteries need to be placed, then one spacer 3 is needed to divide the interior of the outer shell 1 into two lithium battery storage spaces, and so on, depending on the number of spacers 3 required. The heat-conducting base plate 2 is connected to the bottom of the outer shell 1 and covers the bottom of each storage space. The heat-conducting base plate 2 can provide support for the lithium batteries on the one hand, and conduct the heat generated by the lithium batteries on the other hand, thereby dissipating heat from the lithium batteries. Therefore, the material of the heat-conducting base plate 2 needs to be selected with certain strength and thermal conductivity, such as stainless steel plate.

[0034] The protective base plate 4 is installed at the bottom of the outer casing 1 and is located below the heat-conducting base plate 2. It is spaced apart from the heat-conducting base plate 2 to form a coolant accommodating cavity 5. The arrangement of placing the protective base plate 4 below the heat-conducting base plate 2 can block flying stones or other splashes when the car is in motion, thereby protecting the lithium battery. Therefore, the material selection of the protective base plate 4 needs to have sufficient strength, and considering cost issues, stainless steel plate is preferably selected. The coolant accommodating cavity 5 formed between the heat-conducting base plate 2 and the protective base plate 4 is used for the entry of coolant, thereby cooling the heat conducted from the heat-conducting base plate 2. The coolant containment chamber 5 is equipped with a sliding partition plate 6, which divides the coolant containment chamber 5 into a first cooling space 7 and a second cooling space 8 that are isolated from each other. The sliding partition plate 6 is slidably connected to the housing to adjust the volume of the first cooling space 7 and the volume of the second cooling space 8. When the coolant temperature in the first cooling space 7 is too high, the sliding partition plate 6 will adjust to reduce the volume of the first cooling space 7 and increase the volume of the second cooling space 8, thereby increasing the coolant in the second cooling space 8. Conversely, when the coolant temperature in the second cooling space 8 is too high, the sliding partition plate 6 will work in the opposite way, thereby exchanging cooling between the two cooling spaces and improving heat dissipation efficiency.

[0035] At least two water tanks 9 are provided, each connected to a first cooling space 7 and a second cooling space 8 via a water pump. The water tanks 9 contain coolant, such as water-glycol-based coolant.

[0036] During heat dissipation, the water pump can draw coolant from the water tank 9 and the cooling space. For example, the coolant in the water tank 9 connected to the first cooling space 7 is first drawn into the first cooling space 7 by the water pump. When the temperature of the coolant in the first cooling space 7 rises to a certain level, the water pump draws the coolant back into the connected water tank 9. At the same time, the water pump connected to the second cooling space 8 draws the coolant into the second cooling space 8. The sliding partition 6 adjusts the volume of the two cooling spaces, thereby performing alternating heat dissipation of the coolant in the two cooling spaces, thus improving the heat dissipation efficiency during heat dissipation.

[0037] Since the heat-conducting base plate 2 is connected to the bottom of the outer shell 1 and covers the bottom of each holding space, on the one hand, when the lithium battery is placed in the holding space, the heat-conducting base plate 2 can provide support for the lithium battery; on the other hand, when the lithium battery generates heat during operation, the heat-conducting base plate 2 can conduct the heat out, thereby dissipating heat from the lithium battery and increasing heat dissipation efficiency.

[0038] The protective base plate 4 is installed at the bottom of the outer casing 1 and is located below the heat-conducting base plate 2. It is spaced apart from the heat-conducting base plate 2 to form a coolant accommodating cavity 5. On the one hand, when the car is in motion, the protective base plate 4 can block flying stones or other splashing objects, thereby protecting the lithium battery. On the other hand, the coolant accommodating cavity 5 contains coolant, which can absorb the large amount of heat generated by the lithium battery during operation, thereby increasing heat dissipation efficiency and improving the service life of the lithium battery.

[0039] Based on the sliding partition plate 6 installed in the coolant receiving cavity 5, the coolant receiving cavity 5 is divided into a first cooling space 7 and a second cooling space 8. The first cooling space 7 and the second cooling space 8 are respectively connected to each water tank 9 through pumps. When heat dissipation is performed, one of the two cooling spaces, for example the first cooling space 7, firstly draws coolant from the water tank 9 into it through the pump. When the temperature of the coolant in the first cooling space 7 rises and the heat dissipation efficiency decreases, the pump draws the coolant in the first cooling space 7 back to the connected water tank 9. At the same time, the water tank 9 connected to the second cooling space 8 sends coolant into the second cooling space 8 through the pump, thereby completing the alternating heat dissipation of the coolant in the two cooling spaces and improving the heat dissipation efficiency.

[0040] Preferably, the protective base plate 4 is provided with a guide rail 10, which is located inside the coolant accommodating cavity 5. The sliding partition plate 6 is slidably engaged with the guide rail 10 via a slider, thereby allowing the sliding partition plate 6 to slide freely within the coolant accommodating cavity 5 to adjust the volume of the first cooling space 7 and the second cooling space 8. Preferably, in addition to the protective base plate 4 being provided with a guide rail 10, the heat-conducting base plate 2 may also be provided with a guide rail 10. Either one of them may be provided with a guide rail 10, or both may be provided with a guide rail 10. The guide rail 10 is located inside the coolant accommodating cavity 5, which allows the sliding partition plate 6 to slide more smoothly.

[0041] Preferably, the protective base plate 4 is made of stainless steel. Since the protective base plate 4 is responsible for blocking stones that are splashed when the car is driving, and considering the cost, it is preferable to choose stainless steel as the protective base plate 4.

[0042] Preferably, the protective shell has a dustproof net 11 on its side wall. The dustproof net 11 connects the lithium battery storage space and the external environment. On the one hand, it allows natural wind to enter the lithium battery storage space when the car is in motion, promoting gas exchange and thus enhancing heat dissipation. On the other hand, it can block dust from entering the lithium battery storage space, thereby reducing the need to clean the lithium battery dust and lowering costs.

[0043] Preferably, the protective shell has horizontal mounting holes, and the dustproof net 11 is installed in the horizontal mounting holes to fix the dustproof net 11; of course, vertical mounting holes or both can also be provided to more firmly fix the dustproof net 11.

[0044] Preferably, a protective junction for lithium batteries in new energy vehicles also includes a control system, which is electrically connected to a water pump to control the water pump to draw coolant.

[0045] Preferably, both the first cooling space 7 and the second cooling space 8 are connected to temperature sensors. Each temperature sensor and water pump is electrically connected to the control system. When the temperature sensor detects that the coolant temperature in a certain cooling space is too high, it can feed back information to the control system. Then, the control system controls the water pump to draw the coolant, drawing the overheated coolant back to the water tank 9 for cooling, while drawing the coolant at normal temperature out to the cooling space, thereby completing the alternating heat dissipation of the coolant.

[0046] Preferably, at least one side wall of the lithium battery holding space is provided with a plurality of first support pads 12, which are used to abut against the lithium battery to fix the lithium battery so that it will not shift due to vibration during vehicle operation.

[0047] Preferably, each side wall of the lithium battery holding space is provided with a first support pad 12, so as to fix the lithium battery from all directions.

[0048] Preferably, the bottom of the spacer 3 is provided with a ventilation hole 13, which connects two adjacent lithium battery storage spaces.

[0049] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A protective structure for lithium batteries in new energy vehicles, characterized in that, include: The protective shell includes an outer shell (1), a heat-conducting base plate (2), and multiple spacer plates (3). The multiple spacer plates (3) are disposed inside the outer shell (1) and form multiple lithium battery storage spaces inside the outer shell (1). The heat-conducting base plate (2) is connected to the bottom of the outer shell (1) and covers the bottom of each storage space. A protective base plate (4) is installed at the bottom of the outer shell (1) and located below the heat-conducting base plate (2), and is spaced apart from the heat-conducting base plate (2) to form a coolant accommodating cavity (5). A sliding partition plate (6) is provided in the coolant accommodating cavity (5). The sliding partition plate (6) divides the coolant accommodating cavity (5) into a first cooling space (7) and a second cooling space (8) that are isolated from each other. The sliding partition plate (6) is slidably connected to the outer shell to adjust the volume of the first cooling space (7) and the volume of the second cooling space (8). At least two water storage tanks (9) are provided, and each water storage tank (9) is connected to the first cooling space (7) and the second cooling space (8) respectively via a water pump.

2. The protective structure for lithium batteries in new energy vehicles according to claim 1, characterized in that, The protective base plate (4) is provided with a guide rail (10), and the sliding partition plate (6) slides with the guide rail (10) through a slider.

3. The protective structure for a new energy vehicle lithium battery according to claim 2, characterized in that, The protective base plate (4) is made of stainless steel.

4. The protective structure for a new energy vehicle lithium battery according to claim 1, characterized in that, The protective shell has a dustproof net (11) on its side wall, which connects the lithium battery storage space with the external environment.

5. The protective structure for a new energy vehicle lithium battery according to claim 4, characterized in that, The protective shell has a horizontal mounting hole, and the dustproof net (11) is installed in the horizontal mounting hole.

6. The protective structure for lithium batteries in new energy vehicles according to claim 1, characterized in that, The new energy vehicle lithium battery protection structure also includes a control system, which is electrically connected to the water pump.

7. The protective structure for a new energy vehicle lithium battery according to claim 1, characterized in that, Both the first cooling space (7) and the second cooling space (8) are connected to temperature sensors, and each of the temperature sensors and the water pump is electrically connected to the control system.

8. The protective structure for lithium batteries in new energy vehicles according to claim 1, characterized in that, At least one side wall of the lithium battery holding space is provided with a plurality of first support pads (12), which are used to abut against the lithium battery.

9. A protective structure for lithium batteries in new energy vehicles according to claim 8, characterized in that, Each side wall of the lithium battery holding space is provided with the first support pad (12).

10. A protective structure for lithium batteries in new energy vehicles according to claim 1, characterized in that, The bottom of the partition plate (3) is provided with a ventilation hole (13), which connects two adjacent lithium battery storage spaces.

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