New energy automobile battery pack protection box body

Abstract

The utility model provides a new energy automobile battery pack protection box body which comprises a box body and a box cover installed on the box body, a containing cavity used for containing a plurality of battery cells is formed in the box body, a buffering cavity is formed in the bottom end of the box body, and a partition plate is arranged between the buffering cavity and the containing cavity; a sliding plate is slidably mounted in the buffer cavity, an air bag assembly is arranged between the sliding plate and the partition plate, and the air bag assembly is filled with a fire extinguishing medium; a through hole is formed in the partition plate, and a plugging assembly used for plugging and releasing the fire extinguishing medium is installed on the air bag assembly. The bottom surface of the box cover is attached to a plurality of battery cells, and a heat exchange runner is arranged in the box cover; the air bag assembly comprises an air bag body and a connecting pipe, and one end of the connecting pipe penetrates through the through hole to be communicated with the containing cavity. The protective assembly solves the problems that in the prior art, an arranged protective assembly is complex in structure, high in manufacturing cost and inconvenient to install.

Description

Technical Field

[0001] The utility model relates to the field of power battery protection, and in particular to a new energy vehicle battery pack protection box. Background Art

[0002] At present, the new energy industry is on the rise, and pure electric vehicles are booming. One of the key parts is the battery. The battery pack on new energy vehicles directly affects the safety of new energy vehicles, so how to optimize the safety performance of the battery pack is particularly important.

[0003] At present, the battery pack is placed directly on the vehicle. When the bottom of the battery pack is subjected to impact force, the batteries in the battery pack are easily damaged, and even the safety problems of the battery cells are caused. In order to solve the problems existing in the prior art, the utility model with publication number CN220233358U discloses a battery protection mechanism for new energy vehicles (hereinafter referred to as: prior art 1), including a shell, a bottom outer wall of the shell is provided with a protection component, and the outer walls on both sides of the shell are welded with equidistantly distributed screw seats, a connecting structure is provided between the protection component and the screw seats, and battery packs distributed equidistantly are fixed inside the shell, and cooling pipes are provided on the inner wall of the shell between the battery packs; the protection component includes a guard plate, contact cotton bonded to the outer wall of the guard plate close to the shell side, and felt cloth bonded to the outer wall of the bottom of the guard plate.

[0004] Although a protective component is provided in the battery housing in order to improve the protective capability of the bottom of the battery pack in the prior art 1, the protective component in the prior art 1 has a relatively complex structure, a high manufacturing cost, and is not easy to install. Utility Model Content

[0005] The purpose of the utility model is to provide a new energy vehicle battery pack protection box, which, in actual use, can solve the problems of the protective components provided in the prior art having a complex structure, high manufacturing cost and inconvenient installation.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A new energy vehicle battery pack protection box, comprising a box body and a box cover installed on the box body, wherein a receiving cavity for receiving a plurality of battery cells is arranged in the box body, a buffer cavity is arranged at the bottom end of the box body, and a partition is arranged between the buffer cavity and the receiving cavity;

[0008] A sliding plate is slidably installed in the buffer cavity, an airbag assembly is arranged between the sliding plate and the partition, and the airbag assembly is filled with a fire extinguishing medium; a through hole is arranged on the partition, and a blocking assembly for blocking and releasing the fire extinguishing medium is installed on the airbag assembly;

[0009] The bottom surface of the box cover is in contact with the multiple battery cells, and a heat exchange channel is arranged inside the box cover.

[0010] Preferably, the airbag assembly includes an airbag body and a connecting tube, one end of the connecting tube passes through the through hole and communicates with the accommodating cavity, the other end of the connecting tube is connected to the airbag body, and the blocking assembly is slidably installed in the connecting tube.

[0011] Preferably, the sealing assembly includes a movable ring, a connecting rod and a sealing plug. A limiting groove is provided in the connecting pipe, and the movable ring is slidably installed in the limiting groove. The movable ring is connected to the sealing plug through the connecting rod, and the sealing plug is used to close or open the connecting pipe.

[0012] Preferably, the sealing plug is in the shape of a truncated cone.

[0013] Preferably, the box body is made of a first metal, and the box cover is made of a second metal, and the thermal conductivity of the first metal is smaller than the thermal conductivity of the second metal.

[0014] Preferably, the fitting surface between the box cover and the battery cell is a plane.

[0015] Preferably, the box cover and the box body are bonded and fixed.

[0016] Preferably, a sealing gasket is connected on the box cover, and the sealing gasket is used to seal the gap between the box cover and the outer side surface of the box body.

[0017] Preferably, a plurality of heat dissipation windows are provided on the box body.

[0018] Preferably, a handle is provided on the box cover.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] In the utility model, by arranging a heat exchange flow channel on the box cover and the bottom surface of the box cover is in contact with a plurality of battery cells, the box cover can be used to dissipate heat from the battery cells, and there is no need to arrange an additional heat exchange plate in the box body, so that the space in the box body is fully utilized, thereby ensuring the overall space utilization of the battery pack;

[0021] By arranging an airbag assembly between the sliding plate and the partition, when the bottom end of the box body is subjected to impact force, the impact force can be buffered and dispersed through the deformation of the airbag assembly, thereby reducing the impact of the impact force on the battery cell, thereby improving the safety of the battery pack;

[0022] When the box body does not receive impact force, the sealing component installed on the airbag assembly is used to seal the fire extinguishing medium filled in the airbag assembly; when the box body receives impact force, the impacted battery cell is prone to thermal runaway and ignition. At this time, the sliding plate that slides after receiving the impact force can drive the airbag assembly to compress. As the airbag assembly is compressed, the sealing component can release the fire extinguishing medium filled in the airbag assembly, so that the fire extinguishing medium can flow into the accommodating cavity through the through hole, which has a better fire extinguishing effect, thereby reducing the impact of thermal runaway and further improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional diagram of the utility model.

[0025] Figure 2 It is a structural schematic diagram of the utility model.

[0026] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 101-box body, 102-box cover, 103-accommodating chamber, 104-buffer chamber, 105-partition, 106-sliding plate, 107-sealing assembly, 108-heat exchange channel, 109-airbag body, 110-connecting pipe, 111-moving ring, 112-connecting rod, 113-sealing plug, 114-slide groove, 115-heat dissipation window, 116-handle, 117-limiting groove, 118-mounting plate, 119-telescopic device. DETAILED DESCRIPTION

[0029] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0030] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0033] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0036] Example

[0037] See also Figure 1-Figure 3 This embodiment discloses a new energy vehicle battery pack protection box, including a box body 101 and a box cover 102 installed on the box body 101, wherein the box body 101 is provided with a receiving cavity 103 for receiving a plurality of battery cells, a buffer cavity 104 is provided at the bottom of the box body 101, and a partition 105 is provided between the buffer cavity 104 and the receiving cavity 103;

[0038] A sliding plate 106 is slidably installed in the buffer cavity 104, an airbag assembly is arranged between the sliding plate 106 and the partition 105, and the airbag assembly is filled with a fire extinguishing medium; a through hole is arranged on the partition 105, and a blocking assembly 107 for blocking and releasing the fire extinguishing medium is installed on the airbag assembly;

[0039] The bottom surface of the box cover 102 is in contact with the plurality of battery cells, and a heat exchange channel 108 is disposed inside the box cover 102 .

[0040] In the utility model, a slide groove 114 is provided on the box body 101, and the sliding plate 106 is slidably hung on the box body 101 through the slide groove 114; a heat exchange channel 108 is provided on the box cover 102, and an opening for connecting with or closing the outside is provided on the heat exchange channel 108, and a cooling medium can be filled into the heat exchange channel 108 through the opening, and heat exchange can be quickly achieved through the flow of the cooling medium. The cooling medium can be a coolant or a cooling gas, etc.; and the bottom surface of the box cover 102 is in contact with the multiple battery cells, so that the box cover 102 can be used to dissipate heat for the battery cells, and there is no need to set an additional heat exchange plate in the box body 101, so that the space in the box body 101 is fully utilized to ensure the overall space utilization of the battery pack; by setting an airbag assembly between the sliding plate 106 and the partition 105, when the bottom end of the box body 101 is subjected to an impact force, the impact force can be buffered and dispersed through the deformation of the airbag assembly, thereby reducing the impact of the impact force on the battery cells, thereby improving the safety of the battery pack; when the box body 101 is not subjected to an impact force The sealing component 107 installed on the airbag assembly is used to seal the fire extinguishing medium filled in the airbag assembly; when the box body 101 receives an impact force, the impacted battery cell is prone to thermal runaway and ignition. At this time, the sliding plate 106 that slides upward after receiving the impact force can drive the airbag assembly to compress. The sealing component 107 no longer blocks the airbag assembly as the airbag assembly is compressed, thereby releasing the fire extinguishing medium filled in the airbag assembly, so that the fire extinguishing medium can flow into the accommodating cavity 103 through the through hole, which has a better fire extinguishing effect, thereby reducing the impact of thermal runaway and improving the safety of the battery.

[0041] The airbag assembly includes an airbag body 109 and a connecting tube 110 , one end of the connecting tube 110 passes through the through hole and communicates with the accommodating cavity 103 , the other end of the connecting tube 110 is connected to the airbag body 109 , and the blocking assembly 107 is slidably installed in the connecting tube 110 . The connecting tube 110 is fixedly connected to the airbag body 109 and communicated with the airbag body 109. When the box body 101 does not receive an impact force, the sealing component 107 installed on the connecting tube 110 is used to close the connecting tube 110 so as to seal the fire extinguishing medium filled in the airbag body 109; when the box body 101 receives an impact force, the sealing component 107 moves vertically downward under the action of the pressure generated after the compression of the airbag body 109. After the movement, the sealing component 107 no longer seals the connecting tube 110, and the fire extinguishing medium filled in the airbag body 109 can be released through the connecting tube 110, so that the fire extinguishing medium can flow into the accommodating cavity 103 through the through hole, which has a better fire extinguishing effect, thereby reducing the impact of thermal runaway and improving the safety of the battery.

[0042] Further optimized, the sealing assembly 107 includes a movable ring 111, a connecting rod 112 and a sealing plug 113. A limiting groove 117 is provided in the connecting tube 110. The movable ring 111 is slidably installed in the limiting groove 117. The movable ring 111 is connected to the sealing plug 113 through the connecting rod 112. The sealing plug 113 is used to close or open the connecting tube 110. When the box body 101 does not receive an impact force, the sealing plug 113 is used to close the connecting tube 110 to seal the fire extinguishing medium filled in the airbag assembly; when the box body 101 receives an impact force, the sliding plate 106 that slides upward after receiving the impact force can drive the airbag assembly to compress, and the pressure generated in the compressed airbag causes the seal to move upward to the outside of the connecting sealing plug 113 and no longer seal the connecting tube 110. The limiting groove 117 guides and limits the movable ring 111, so that the sealing plug 113 will not be separated from the connecting tube 110 under the action of the pressure generated in the airbag body 109; the fire extinguishing medium filled in the airbag assembly can be released through the connecting tube 110, so that the fire extinguishing medium can flow into the accommodating cavity 103 through the through hole, thereby achieving a better fire extinguishing effect.

[0043] The sealing plug 113 is in a truncated cone shape, which can facilitate the sealing or opening of the connecting pipe 110 .

[0044] Further optimization, the box body 101 is made of a first metal, the box cover 102 is made of a second metal, the thermal conductivity of the first metal is less than the thermal conductivity of the second metal. The first metal is steel metal, and the second metal is aluminum metal. By using a box cover 102 with a higher thermal conductivity and integrating a heat exchange channel 108 in the box cover 102, the heat exchange efficiency of the battery cell can be improved.

[0045] The contact surface between the box cover 102 and the battery cell is a plane. By making the contact surface between the box cover 102 and the battery cell a plane, the contact area between the battery cell and the box cover 102 can be increased, thereby further improving the heat exchange efficiency of the battery cell.

[0046] Further optimization is that the box cover 102 is bonded and fixed to the box body 101. By bonding the box cover 102 and the box body 101, the gap between the box cover 102 and the box body 101 can be initially sealed while the box cover 102 is fixed.

[0047] The box cover 102 is connected with a sealing gasket, which is used to seal the gap between the box cover 102 and the outer side of the box body 101. The sealing gasket is made of rubber material, and the gap between the box cover 102 and the box body 101 can be sealed by the sealing gasket to prevent dust and impurities from entering the accommodating cavity 103.

[0048] Further optimization, a plurality of heat dissipation windows 115 are provided on the box body 101. The heat dissipation windows 115 provided on the box body 101 can further dissipate heat for a plurality of battery cells placed in the box body 101.

[0049] The box cover 102 is provided with a handle 116. The handle 116 provided on the box cover 102 can facilitate the transfer and installation of the box body 101.

[0050] Further optimization, a mounting plate 118 is fixedly connected in the box body 101, a telescopic device 119 is connected to the mounting plate 118, a fixed end of the telescopic device 119 is fixedly connected to the mounting plate, the telescopic end of the telescopic device 119 passes through the partition 105 and is connected to the sliding plate 106, and the telescopic end of the telescopic device 119 is slidably and sealedly connected to the partition 105; a sensor is installed in the box body 101, and a controller connected to the sensor is installed on the telescopic device 119; when the sensor detects that the temperature in the box body 101 rises suddenly and the battery cell has thermal runaway, a signal is sent to the controller installed on the telescopic device 119, and the controller is used to The telescopic end of the telescopic device 119 is driven to move the partition vertically upward to ensure that the sealing assembly can release the fire extinguishing medium in the airbag body 109 when the battery cell is overheated, so that the fire extinguishing medium can enter the accommodating cavity 103 for fire extinguishing and cooling; in this embodiment, the structure of the sensor, controller and telescopic device 119 and the connection relationship and function between the sensor, controller and telescopic device 119 are all conventional settings in the prior art. This embodiment no longer explains one by one the principle of the sensor driving the telescopic device 119 to extend and retract through the controller. The telescopic device in this embodiment is a telescopic rod structure commonly used in the prior art.

[0051] The telescopic end of the telescopic device 119 is fixedly connected with a damper, and the telescopic end of the telescopic device 119 is connected to the sliding plate 106 through the damper. When the impact force on the bottom of the box body 101 is small, the airbag body 109 and the damper placed between the partition 105 and the sliding plate 106 only slightly deform to play a buffering role; the slightly deformed airbag body 109 will not drive the blocking component 107 to move and release the fire extinguishing medium; the battery cell in the box body 101 does not have thermal runaway, and the telescopic device 119 will not be extended or retracted under the action of the controller. The damper can protect the telescopic device 119 and avoid damage to the telescopic device 119 caused by a collision between the moving sliding plate 106 and the telescopic device 119.

[0052] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy vehicle battery pack protection box, comprising a box body (101) and a box cover (102) mounted on the box body (101), characterized in that: A receiving cavity (103) for receiving a plurality of battery cells is provided in the box body (101), a buffer cavity (104) is provided at the bottom end of the box body (101), and a partition (105) is provided between the buffer cavity (104) and the receiving cavity (103); A sliding plate (106) is slidably installed in the buffer cavity (104); an airbag assembly is arranged between the sliding plate (106) and the partition (105); the airbag assembly is filled with a fire extinguishing medium; a through hole is arranged on the partition (105); a blocking assembly (107) for blocking and releasing the fire extinguishing medium is installed on the airbag assembly; The bottom surface of the box cover (102) is in contact with the plurality of battery cells, and a heat exchange flow channel (108) is provided inside the box cover (102).

2. A new energy vehicle battery pack protection box according to claim 1, characterized in that: The airbag assembly comprises an airbag body (109) and a connecting tube (110), one end of the connecting tube (110) passes through the through hole to communicate with the accommodating cavity (103), the other end of the connecting tube (110) is connected to the airbag body (109), and the blocking assembly (107) is slidably installed in the connecting tube (110).

3. A new energy vehicle battery pack protection box according to claim 2, characterized in that: The sealing assembly (107) comprises a movable ring (111), a connecting rod (112) and a sealing plug (113); a limiting groove (117) is provided in the connecting pipe (110); the movable ring (111) is slidably installed in the limiting groove (117); the movable ring (111) is connected to the sealing plug (113) via the connecting rod (112); and the sealing plug (113) is used to close or open the connecting pipe (110).

4. A new energy vehicle battery pack protection box according to claim 3, characterized in that: The sealing plug (113) is in the shape of a truncated cone.

5. The new energy vehicle battery pack protection box according to claim 1, characterized in that: The box body (101) is made of a first metal, and the box cover (102) is made of a second metal, wherein the thermal conductivity of the first metal is smaller than the thermal conductivity of the second metal.

6. The new energy vehicle battery pack protection box according to claim 1, characterized in that: The bonding surface between the box cover (102) and the battery core is a flat surface.

7. The new energy vehicle battery pack protection box according to claim 1, characterized in that: The box cover (102) and the box body (101) are bonded and fixed.

8. The new energy vehicle battery pack protection box according to claim 1, characterized in that: A sealing gasket is connected to the box cover (102), and the sealing gasket is used to seal the gap between the box cover (102) and the outer side surface of the box body (101).

9. The new energy vehicle battery pack protection box according to claim 1, characterized in that: A plurality of heat dissipation windows (115) are provided on the box body (101).

10. A new energy vehicle battery pack protection box according to claim 1, characterized in that: A handle (116) is provided on the box cover (102).

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